Patent Application
20230304619
The present invention relates to a system, an adapter member, an adapter housing, and an adapter system comprising the adapter member and the adapter housing, all of which are configured to establish a flow-conducting or fluid-conducting, in particular gas-conducting, connection between an element, such as a sensor or system connector, and a counterpart, such as a component selected from the group consisting of: a pressure vessel, a valve, a valve assembly, a valve block and the like. The present invention furthermore relates to a method for connecting an element to a counterpart in a flow-conducting or fluid-conducting, in particular a gas-conducting manner.
Devices for establishing a connection, in particular a flow-conducting or fluid-conducting connection, between an element, such as a pressure sensor, and a counterpart, such as a high-pressure vessel, are known from the prior art. Therein, for example, a pressure sensor for detecting the pressure in the high-pressure vessel is connected to a component (counterpart), such as an on-tank valve (OTV) or a gas handling unit (GHU), or is screwed directly into the high-pressure vessel or gas pressure tank. The pressure sensor can alternatively also be connected into other gas-conducting parts that are directly connected to the high-pressure vessel. Since sealing plays a decisive role in the case of gases, sealing members are typically used, which seal the connection point between the element (pressure sensor) and the counterpart (component). This also applies in particular in the case of high-pressure applications, such as in pipe elements for compressed natural gases or for compressed hydrogen. In particular when sealing hydrogen, appropriate sealing members that offer high diffusion resistance to the hydrogen are of vital importance.
Furthermore, in particular in the case of hydrogen applications, parts such as pressure sensors, pressure gauges, temperature sensors and many other parts installed in hydrogen supply systems must be regularly inspected and demounted. In this regard, it is problematic, in particular in the case of high-pressure systems with a pressure of 700 bar and more, to drain the components, such as valve blocks or pipes, that are connected to the part to be removed. The component (counterpart) must be free of gas and secured in such a manner that a large amount of hydrogen can under no circumstances escape from the system. In particular high-pressure sensors must be replaced annually. In some hydrogen applications, the pressure sensors are screwed directly onto the high-pressure vessels, which means that these must be completely drained before the high-pressure sensor can be removed. This is a difficult, dangerous and expensive matter since after the system has been drained, it must be inerted with nitrogen gas, and only when it has been ensured that there is no oxygen in the system can it be filled with hydrogen. Since the two gases do not mix, this is a time-consuming process and there is always a residual risk of nitrogen remaining in the system.
A further disadvantage of conventional connection techniques for gas-conducting elements is the fact that both the sealing members and the screw members used to create the sealing effect come into direct contact with the medium to be sealed, in particular the gas. This is not dramatic in the case of conventional gases such as natural gases, but can be a major source of danger for connections used for parts in hydrogen applications. Since many materials, in particular metals, are prone to so-called “hydrogen embrittlement” when they come into contact with hydrogen, this, in particular when combined with alternating stress (changes in temperature and tension) and vibrations, can often lead to leaks in the case of known connecting techniques. Since hydrogen is the lightest of all the chemical elements, permanently sealed connection points are difficult to realise.
For example, U.S. Pat. No. 5,528,941 A describes a pressure sensor 10 that can be connected to a fuel tank 40 by means of an adapter. For this purpose, the adapter comprises a housing 4 and a chamber 11 for receiving the sensor. The housing 4 is sealed in the fuel tank 40 by means of an O-ring seal 5. The pressure sensor 10 is also secured and sealed in a cylindrical recess 12 by means of a sealing ring. However, if the pressure sensor 10 must now be removed from the adapter 10 and thus from the recess 12 for inspection or maintenance, a direct connection to the interior of the fuel tank 40 is created, which is why the fuel tank must be completely drained before the pressure sensor 10 is detached.
In view of the above-described problems when connecting or joining an element to a counterpart, such as a component selected from the group consisting of: a pressure vessel, a valve, a valve assembly, a valve block and the like, it is an object of the present invention to provide a system, an adapter member, an adapter housing, an adapter system comprising the adapter member and the adapter housing as well as a method, which are capable, on the one hand, of allowing the element to be demounted from the counterpart (component) without the need, for example, to reduce the pressure present in the counterpart (draining), and, on the other hand, are capable of taking into account the problems described above, such as hydrogen embrittlement, the occurrence of leakages caused by temperature and tension changes as well as vibrations.
The cited object is solved by a system for connecting/joining an element to a counterpart in a flow-conducting or fluid-conducting manner according to claim 1, an adapter member according to claim 15, an adapter housing according to claim 20, an adapter system according to claim 23, and a method according to claim 24.
Preferred embodiments of the invention are specified in the dependent claims, and the subject matters of the system can be used within the framework of the adapter member, the adapter housing, the adapter system and the method for connecting an element to a counterpart, and vice versa.
One of the basic ideas of the present invention is to provide a system for connecting/joining an element to a counterpart in a flow-conducting or fluid-conducting manner, which system comprises two seals disposed in a fluid channel one behind the other in an outflow direction of a fluid, in particular a gas, out of the counterpart, which fluid channel connects the element to the counterpart in a flow-conducting or fluid-conducting, in particular a gas-conducting manner, the first seal being formed from a valve body and a first sealing member, the valve body being configured to be shifted or movable between an open position, in which a fluid, in particular gas, can flow through the fluid channel, and a closed position, in which no fluid can flow through the channel. The second seal, which is disposed in the fluid channel downstream of the first seal in the outflow direction of the fluid flowing through/flowing out through the fluid channel is configured to seal, in particular in a gas-tight manner, a connecting region between the fluid channel and the element, the second seal being configured such that when connecting/joining the element to the counterpart, it seals the connecting region before the first seal can be/is mechanically shifted or moved into the open position.
A system (coupling system) can thus be provided which, on the one hand, can ensure that before a seal (first seal) sealing a counterpart, in particular a component, is released or opened, an additional or further seal (second seal) can be realised between the same parts, which prevents or minimises the escape into the environment of the gas present, for example stored, in the counterpart when the first seal is released or opened, and which, on the other hand, protects parts of the system, in particular seals, from contact with the fluid, in particular hydrogen, and the associated ageing of the material, in particular hydrogen embrittlement. Minimisation of the outflowing fluid, in particular the gas, when producing or releasing the connection between the element and the counterpart, in particular the component, is extremely advantageous, in particular in the field of explosion protection.
According to one aspect of the present invention, a system for connecting or joining an element, in particular a sensor or a system connector, to a counterpart in a flow-conducting or fluid-conducting, in particular a gas-conducting manner, in particular to a component selected from the group consisting of: a pressure vessel, a valve, a valve assembly, a valve block and the like, comprises: a first seal consisting of a valve body and a first sealing member, said sealing member being disposed in a fluid channel that in particular connects the element to the counterpart in a flow-conducting or fluid-conducting, in particular a gas-conducting manner, and said valve body being configured such that it can be shifted or moved, by means of interaction with the first sealing member, between an open position, in which a fluid, in particular gas, can flow through the fluid channel, and a closed position, in which no fluid, in particular gas, can flow through the fluid channel, and a second seal which is disposed in the fluid channel downstream of the first seal in an outflow direction of the fluid flowing through or flowing out through the fluid channel, and which is configured to seal, in particular in a gas-tight manner, a connecting region between the fluid channel and the element, said second seal being configured such that when connecting or joining the element to the counterpart, it seals the connecting region before the first seal can be or is shifted or moved into the open position, in particular can be or is mechanically shifted or moved into the open position.
In this context, the term “interaction” is to be understood to mean that, by enabling a relative movement, in particular a translatory movement, of the valve body relative to the first valve member, the valve body can be brought into contact, in particular gas-tight contact, with the first sealing member, as a result of which the first seal can be brought into the closed position in which no fluid, in particular gas, can flow through the first seal and thus the fluid channel. On the other hand, when the contact between the valve body and the first sealing member is released by spacing the valve body apart from the first sealing member, the first seal can be brought into the open state in which the fluid can flow through the first seal and the fluid channel.
In this context, the “outflow direction” furthermore describes a direction in which the fluid, in particular the gas, flows out of the counterpart, in particular the component, in which it is pressurised, to the element, in particular the sensor or the system connector, when the first seal is brought into the open position. For example, in the case of a system connector of a high-pressure tank for hydrogen or a plurality of high-pressure tanks that are combined to form a bundle, for example in an exchangeable container or exchangeable cartridge, the system connector can be configured as a quick coupling that enables the high-pressure tank(s) to be connected to a fuel cell system in an uncomplicated manner without hydrogen being able to escape when coupling the high-pressure tank(s) to the system. In this context, the outflow direction is from the high-pressure tanks to the fuel cell system or out of the quick coupling.
Furthermore, the term “mechanical” used here in connection with “can be brought into the open position” describes that the valve body can be or is moved into the open position by means of a mechanically initiated movement, for example by means of contact with a plunger (projection of the element).
It may be advantageous here if the first seal and/or the second seal, in particular the first sealing member and/or the second sealing member, is formed as a radial seal, a resilient seal, an O-ring, a delta ring, a liquid seal, a metal seal and the like, wherein in particular the second seal is preferably formed between an outer surface of the element and an inner surface of the fluid channel. It does not matter whether the second seal, in particular a sealing member (second sealing member) of the second seal, is provided on the inner surface of the fluid channel or the outer surface of the element, as long as it achieves a sealing effect between the inner surface of the fluid channel and the outer surface of the element.
It is furthermore advantageous if the valve body is configured to be brought into contact, in particular gas-tight contact, with a valve seat formed on the first sealing member, the valve seat preferably being in the form of a tapered surface, in particular a conical surface. A seal formed in such a manner is also called a “metal seal”.
A “metal seal” is understood to mean that two elements made of metal are pressed against each other under the influence of force such that a fluid-tight connection is created between the two elements. In such a case, an annular contact surface is usually created between the two elements, through which the fluid to be sealed, in particular gas, can flow if the seal is in the open state.
The valve body can alternatively be configured so as to descend into the first sealing member, which is formed, for example, as a radial seal, in particular an O-ring, and thereby close the fluid channel. If the first seal is to be opened, the valve body must preferably be forced or pressed out of the first sealing member by an adapter body of an adapter member of the element.
It is furthermore advantageous if the valve body has an at least partially conical shape, rounded shape, spherical shape or globular shape, in particular at an end face that is configured to be brought into contact with a valve seat of the first sealing member.
According to a further embodiment, the valve body and the valve seat are configured in such a manner that an annular contact surface is formed, with a central axis of the valve seat and a central axis of the valve body being disposed parallel to one another, in particular coaxially to one another, and the valve body being displaceable parallel to the two central axes, in particular in a mounting direction (opposite to the outflow direction).
It is furthermore preferred that a projection, in particular an annular projection, is formed in the fluid channel, which is configured to receive or support the first sealing member that is preferably annular.
It is furthermore advantageous if the projection forms a stop against which the first sealing member can be fixed and/or pressed, whereby the sealing member can preferably be pressed against the projection by a clamping member. It is preferred if the clamping member is in the form of a clamping nut with an external thread.
It is furthermore preferred that the clamping member comprises an external thread, by means of which the clamping member can be adjusted against the first sealing member, as a result of which the first sealing member can be pressed against the projection, and/or that a portion of the fluid channel extends through the clamping member, in particular through the centre thereof, with in particular the connecting region being formed within said portion of the fluid channel.
It is furthermore advantageous if the element comprises a projection which is preferably cylindrical and is configured to be insertable into the fluid channel, with a distance from an end face of the projection, which is configured to come into or be brought into contact with the valve body, to a second sealing member of the second seal, which is disposed on an outer surface of the projection, being set in such a manner that the second sealing member of the second seal seals the connecting region between the fluid channel and the outer surface, in particular in a gas-tight manner, before the end face comes into or is brought into contact with the valve body, in particular when the element is connected or joined to the counterpart.
It is furthermore preferred that the clamping member and the first sealing member comprise a sealing surface on the end sides respectively facing one another, which create or form a gas-tight contact when the clamping member is pressed against the first sealing member.
According to a further embodiment of the present invention, the valve body is pretensioned by means of a spring element, in particular a spring, against the first sealing member, in particular the valve seat formed therein.
It is furthermore preferred if the valve body is movably, in particular in a translatory manner, received and supported in a recess, and the spring element is provided in a bottom region of the recess, wherein at least the bottom region is sealed with respect to the fluid flowing through the fluid channel by means of a third seal that is preferably provided on an outer surface of the valve body or an inner surface of the recess.
It is advantageous here if the element comprises an adapter body that is configured to be screwed into the counterpart, in particular an adapter housing, by means of an external thread or to be inserted into the counterpart, in particular the adapter housing, and to be fastened thereto by means of at least one fastening element, in particular a plurality of screws, wherein the projection is formed on a side of the adapter body that is facing the counterpart, in particular in the inserted or mounted state.
It can be particularly advantageous if the system, in particular the element or the adapter body of the element, is configured to perform a purely translatory movement, in particular in the mounting direction, during the creation of the gas-tight connection between the element, in particular the adapter body, and the counterpart. In other words, the system can be configured such that no relative rotational movement of the element or the adapter body to the counterpart occurs or is necessary during connection of the element to the counterpart. This makes mounting easier, in particular in the case of long pipe elements provided with a plurality of bends. This constitutes a major advantage over known screw connections, which, in most cases, are screwed into a counterpart via an external thread.
The element, in particular the adapter body, can advantageously be provided with at least two, preferably four, through-holes for receiving fastening screws, the through-holes preferably being provided on a flange projection of the element, in particular of the adapter body, and the through-holes or fastening screws preferably being disposed behind the two seals in the outflow direction of the fluid.
The adapter body can furthermore be formed with an (internal) fluid channel which, in the state in which the element is screwed or inserted in the counterpart, is connected in a flow-conducting or fluid-conducting, in particular a gas-conducting manner to the fluid channel that is preferably formed at least partially in the counterpart, said fluid channel of the adapter body preferably having at least one opening (hole) provided laterally on the outer surface of the element, in particular of the adapter body, via which the fluid channel is connected in a flow-conducting or fluid-conducting, in particular a gas-conducting manner to the fluid channel (412).
According to a further embodiment of the present invention, the adapter body further comprises a fourth seal which is disposed downstream of the first seal and the second seal in the outflow direction and which is configured to provide a seal, in particular a gas-tight seal, between an outer surface of the adapter body (element) and an inner surface of the fluid channel.
It is furthermore advantageous if the element and the adapter body are integrally formed or if the adapter body is part of an adapter member into which the element can be inserted in a gas-tight manner so as to be connectable or joinable in a flow-conducting or fluid-conducting manner, in particular a gas-conducting manner, to the counterpart, in particular to an adapter housing integrated or incorporated in the counterpart.
The present invention furthermore relates to an adapter member for connecting or joining an element, in particular a sensor or a system connector, to a counterpart in a flow-conducting or fluid-conducting, in particular a gas-conducting manner, in particular to a component from the group consisting of: a pressure vessel, a valve, a valve assembly, a valve block and the like, preferably for use in the system described above, comprising: an adapter body that is configured to be screwed into the counterpart by means of an external thread or to be inserted into the counterpart and fastened thereto by means of at least one fastening element, preferably a plurality of screws, a projection that is configured to be insertable into a fluid channel formed in the counterpart and to be brought into contact with a valve body of a first seal disposed in the fluid channel in order to bring the first seal into an open position in which a fluid, in particular a gas, can flow through the fluid channel into the element, and a second seal, which is disposed in the fluid channel downstream of the first seal in an outflow direction of the fluid flowing through or flowing out through the fluid channel, and which is configured to seal, in particular in a gas-tight manner, a connecting region between the fluid channel and the adapter body, wherein the second seal is configured such that when connecting or joining the element, in particular the adapter member, to the counterpart, it seals the connecting region before the first seal is shifted or moved into the open position by contact of the projection with the valve body.
It is furthermore preferred if the second seal, in particular a second sealing member, is formed as a radial seal, a resilient seal, an O-ring, a delta ring, a liquid seal, a metal seal and the like, in particular between an outer surface of the adapter body and an inner surface of the fluid channel. The second sealing member is preferably configured on the outer surface of the adapter body or the inner surface of the fluid channel.
It is furthermore advantageous if the second seal is formed as a metal seal or a curved-surface seal, with a valve body portion being formed preferably on the adapter body, which valve body portion at least partially has a conical shape, rounded shape, spherical shape or globular shape, and is configured to be brought into contact, in particular gas-tight contact, with a second valve seat provided in the counterpart, in particular in the adaptor housing or in the clamping member, which second valve seat preferably has a tapered shape, in particular a conical shape.
It is particularly advantageous if, in the sealed state, the valve body of the second seal is pressed against the valve seat formed in the counterpart via a screw connection, in particular at least two, preferably four, clamping screws.
A device or screw connection can be realised in this manner, wherein with a predetermined tightening torque of the clamping screws, a relatively precise pressing of the valve body against the valve seat can be realised, such that a sealing contact of the corresponding elements can be ensured over a wide temperature range, and documentation and thus certification is possible using the applied tightening torques.
According to a further embodiment of the present invention, the valve body and/or the valve seat is made from a metal, in particular a steel material, preferably a stainless steel material, with the valve seat preferably being made of a harder material than the valve body.
If the valve seat is made of a harder material than the valve body, it can be ensured that in the event of a possible plastic deformation when pressing the valve body against or into the valve seat, the valve body will plastically deform, which can easily be replaced.
It is furthermore advantageous if a distance from an end face of the projection of the adapter member, which is configured to come into contact with the valve body, to a second sealing member of the second seal, is set or selected in such a manner that the second sealing member of the second seal seals the connecting region between the fluid channel and the outer surface, in particular in a gas-tight manner, before the end face (when connecting or joining the element, in particular the adapter member, to the counterpart) comes into contact with the valve body.
According to a further embodiment of the present invention, the adapter member is integrated, preferably in one piece, into the element, in particular the sensor or the system connector.
The present invention furthermore relates to an adapter housing, in particular an adapter housing that can be integrated into a counterpart, for connecting or joining an element, in particular a sensor or a system connector, to a counterpart in a flow-conducting or fluid-conducting manner, in particular to a component selected from the group consisting of: a pressure vessel, a valve, a valve assembly, a valve block and the like, preferably for use in the system described above, comprising: a first seal consisting of a valve body and a first sealing member, said first sealing member being disposed in a fluid channel that connects in particular the element to the counterpart in a flow-conducting or fluid-conducting, in particular gas-conducting manner, and said valve body being configured such that it can be shifted or moved, by means of interaction with the sealing member, between an open position, in which a fluid, in particular gas, can flow through the fluid channel, and a closed position, in which no fluid, in particular gas, can flow through the fluid channel, and a second seal which is disposed in the fluid channel downstream of the first seal in an outflow direction of the fluid flowing through or flowing out through the fluid channel, and which is configured to seal, in particular in a gas-tight manner, a connecting region between the fluid channel and the element, said second seal being configured such that when connecting or joining the element to the counterpart, it seals the connecting region, in particular in a gas-tight manner, before the first seal can be or is shifted or moved into the open position.
It is preferred if the valve body is configured to be shiftable or movable between the closed position and the open position by contact with a projection or plunger, in particular with an end face of the projection of the element.
It is furthermore advantageous if the valve body is pressed under force against the first seal by means of a spring element, in particular a spring, which forces the valve body into the closed position of the first seal.
It is particularly preferred that the adapter housing is formed integrally, in particular in one piece, with the counterpart, in particular the component selected from the group consisting of: a pressure vessel, a valve, a valve assembly, a valve block and the like.
The present invention furthermore relates to an adapter system for connecting or joining an element, in particular a sensor or a system connector, to a counterpart in a flow-conducting or fluid-conducting manner, in particular to a component selected from the group consisting of: a pressure vessel, a valve, a valve assembly, a valve block and the like comprising: the above-described adapter member as well as the above-described adapter housing, the adapter member and the adapter housing being configured as a functional group that can be disposed between the element and the counterpart in a flow-conducting or fluid-conducting manner, and preferably being connectable, in particular screwable, (in a gas-tight manner) to the element or the counterpart, respectively
The system according to the invention for connecting an element to a counterpart in a flow-conducting or fluid-conducting, in particular gas-conducting manner enables a contact point or connection point to be reliably sealed when removing the element from the counterpart by means of a simple and inexpensive design. The system furthermore advantageously enables documentation and certification. It is therefore particularly suitable for connecting elements such as sensors and system connectors in systems in which hydrogen, in particular compressed hydrogen, or compressed natural gas is used. Such systems, which are exposed to particularly high temperature fluctuations, tension fluctuations and vibrations, are found in particular in vehicles in which, for example, hydrogen at pressures of 700 bar and more or natural gas at typically 260 bar is used as fuel to power the vehicle, for example via a fuel cell.
In the context of the present invention, the term “vehicle” or “means of transport” or other similar terms includes motor vehicles in general, such as passenger vehicles including sports utility vehicles (SUVs), buses, lorries, various commercial vehicles, water vehicles including various boats and ships, aircraft, aerial drones and the like, hybrid vehicles, electric vehicles, plug-in hybrid electric vehicles, hydrogen vehicles and other alternative vehicles. As stated herein, a hybrid vehicle is a vehicle with two or more energy sources, for example, petrol-powered and simultaneously electric-powered vehicles.
The present invention furthermore relates to a method for connecting an element, in particular a sensor or a system connector, to a counterpart in a flow-conducting or fluid-conducting, in particular gas-conducting manner, in particular to a component selected from the group consisting of: a pressure vessel, a valve, a valve assembly, a valve block and the like, preferably using the above-described system or the above-described adapter system, comprising:
In other words, according to the method of the invention, opening of the first seal is prevented until the second seal seals the fluid channel against the element to be connected or joined to the counterpart, thereby preventing the pressurised fluid in the counterpart 300 from escaping into the environment.
As already indicated above, the system, the adapter member, the adapter housing and the adapter system for connecting an element to a counterpart in a flow-conducting or fluid-conducting manner can be used for the described method for connecting an element to a counterpart in a flow-conducting or fluid-conducting manner. The further features disclosed in connection with the above description of the device can therefore also be applied to the method. The same is true vice versa for the method.
Further features and advantages of a device, a use and/or a method are apparent from the following description of embodiments with reference to the accompanying figures. In these figures:
Identical reference numbers that are used in different figures designate identical, corresponding or functionally similar elements.
A receiving chamber 11 for receiving the pressure sensor 10 is furthermore formed in the upper region of the connector housing 4. A passage 12 having a larger diameter for receiving the sensing portion 10a of the pressure sensor 10 is formed in a bottom region of the connector housing 4. A passage 14 having a smaller diameter for introducing the internal pressure in the fuel tank 40 into the sensing portion 10a of the pressure sensor 10 is also formed in the bottom region and extends from a lower end of the passage 12 having a larger diameter to a lower surface of the bottom region. An O-ring 8 is provided to seal the pressure sensor 10 in the passage 12 having a larger diameter.
As is apparent from
As is furthermore apparent from
In this manner, the element 200, in particular the pressure sensor, can be connected to a flow-conducting or fluid-conducting, in particular gas-conducting, pipe or part within the counterpart 300, in particular the valve block. The fluid channel 301 thus allows a pressure present in the valve block, for example, or a pressure present in a part communicating with the valve block to be determined by means of the pressure sensor.
The first sealing member 102 is formed as a disc, provided in the centre of which is a through-hole which forms a part of the fluid channel 301. The disc is furthermore formed with a valve seat 102a, which in particular surrounds the through-hole and is configured to come into contact with the valve body 101 so as to realise a fluid-tight, in particular gas-tight, seal. As is apparent from
In order to fix the first sealing member 102, in particular the disc, in the fluid channel 301, the fluid channel 301 is formed with an annular projection 303 which protrudes inwardly into the fluid channel 301 and is configured to support the first sealing member 102 from the left side (in
As shown in
In the shown embodiment, the valve body 101 furthermore has a mushroom shape, with a head side of the valve body 101, which faces the first sealing member 102, having a conical shape. In the shown embodiment, the conical end face 101a of the valve body 101 has a frustum shape. In other words, the valve body 101 has the shape of a truncated cone with a flat stop surface.
The valve body 101 is received in a recess 304 formed in the counterpart 300, said valve body 101 being received in the recess 304 in particular in such manner that it can perform an axial or translatory movement, in particular in the direction of the first sealing member 102. In the recess 304, which is cylindrical in shape, a spring 104, in particular a compression spring, is provided in a bottom region 304a of the recess 304, which acts against the valve body 101. The valve body 101 is pretensioned against the first sealing member 102 by the spring 104, as a result of which the valve body 101 is forced into a closed state by the spring 104, in which the valve body 101 is in a fluid-tight, in particular gas-tight, state with the first sealing member 102, in which no fluid, in particular gas, can flow through the fluid channel 301. This state is shown in particular in
If the element 200, in particular the pressure sensor, is now supposed to be connected to the counterpart 300, an adapter member 400, which can be part of the element 200 or is a separate adapter member that is connected in a fluid-tight or gas-tight manner to the element 200, in particular the pressure sensor, is inserted into the fluid channel 301. In the embodiment shown in
As
In other words, the second seal 120 is configured such that when the element 200 is removed from the counterpart 300, it seals the connecting region 302 at least until the first seal is shifted or moved into the closed position. On the other hand, when the element 200 is connected to the counterpart 300, the second seal 120 is configured such that when connecting the element 200 to the counterpart 300, it seals the connecting region before the first seal is shifted or moved into the open position.
For this purpose, a distance D from the end face 403 of the projection 402 to the second sealing member 121 of the second seal 120 is set such that the second sealing member 121 seals the connecting region 302 between the fluid channel 301 and the outer surface 401 before the end face 403 of the element 200 comes into contact with the valve body 101, in particular the truncated end face thereof, thereby ensuring that the second seal 120 seals before the first seal 110 is opened or brought into a non-sealing state. In other words, before the valve body 101 is lifted off the valve seat 102a against the spring 104.
As is furthermore apparent in
The adapter member 400, in particular an adapter body 410 of the adapter member 400, furthermore comprises a fourth seal. A fourth sealing member 141 of the fourth seal 140 is also formed as an O-ring, which realises a gas-tight seal between an outer surface of the adapter body 410 (outer surface of the adapter member) and the fluid channel 301, as a result of which the gas-tightness of the system 100 can be further improved.
It is also apparent in
As is furthermore apparent from
It is also apparent from
As
| Number | Date | Country | Kind |
|---|---|---|---|
| 10 2020 209 735.6 | Aug 2020 | DE | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/EP2021/071272 | 7/29/2021 | WO |
