Patent Application
20250010313
The present application is based on, and claims priority from JP Application Serial Number 2023-112260, filed Jul. 7, 2023, the disclosure of which is hereby incorporated by reference herein in its entirety.
The present disclosure relates to a liquid spray nozzle and a liquid spray device.
In the related art, various liquid spray nozzles and liquid spray devices including the liquid spray nozzles have been used. Among these, there is a liquid spray nozzle which includes a liquid sending member in which a flow path through which liquid flows is formed and a nozzle member in which a nozzle aperture is formed. For example, there is disclosed in JP-A-10-230190 a washing nozzle in which an inner metal fitting with a closed tip end is inserted into a hose tip end section. The hose tip end section includes a configuration in which a hose is fastened and fixed to the inner metal fitting by a crimping metal tightening from the outer periphery of the hose. The hose tip end section is inserted into a hole of a base body. The base body and the hose tip end section are fixed by a solid agent. A plurality of nozzle apertures is formed in the crimped metal fitting, the hose, and the inner metal fitting from the outer periphery of the base body.
However, although the washing nozzle disclosed in JP-A-10-230190 is capable of washing an inner surface of a tube along the inner surface of the tube having a complex bend, the base body tends to become larger and larger with respect to the hose because washing nozzles intended for this purpose need a base body spherical and the like. In addition, it cannot be said that liquid can be sprayed with sufficient collision pressure for use in applications other than washing of an inner surface of a tube. Thus, related art liquid spray nozzles, such as that disclosed in JP-A-10-230190, are not compact and capable of spraying liquid at high collision pressure.
The liquid spray nozzle of the present disclosure for solving the above-described problem includes a liquid sending member in which a flow path through which liquid flows is formed; a nozzle member formed with at least one nozzle aperture that sprays the liquid in a continuous flow and that changes the continuous flow into droplets; a first member that is provided with a flowing path configured to enable flow of the liquid, that is arranged between the liquid sending member and the nozzle member, and that has one end inserted into the flow path of the liquid sending member; a nozzle pressing member that presses and fixes the nozzle member against the first member; and a second member that is fixed to the liquid sending member by pressing the liquid sending member from an outer side of the liquid sending member in a state where the one end is inserted into the flow path.
First, the present disclosure will be schematically described.
A liquid spray nozzle according to a first aspect of the present disclosure for solving the above-described problem includes a liquid sending member in which a flow path through which liquid flows is formed; a nozzle member formed with at least one nozzle aperture that sprays the liquid in a continuous flow and that changes the continuous flow into droplets; a first member that is provided with a flowing path configured to enable flow of the liquid, that is arranged between the liquid sending member and the nozzle member, and that has one end inserted into the flow path of the liquid sending member; a nozzle pressing member that presses and fixes the nozzle member against the first member; and a second member that is fixed to the liquid sending member by pressing the liquid sending member from an outer side of the liquid sending member in a state where the one end is inserted into the flow path.
According to the aspect, it is possible to cause liquid to collide with a target by spraying liquid in a continuous flow and changing the continuous flow into droplets. As described above, by spraying liquid in a continuous flow and changing the continuous flow into droplets and collide with the target in droplets form, collision pressure caused by liquid is dramatically improved as compared with a configuration in which the liquid is simply sprayed in a continuous flow and collides with the target in continuous flow. In addition, in a state where one end of the first member to which the nozzle member is fixed by the nozzle pressing member is inserted into the flow path, the liquid spray nozzle is fixed to the liquid sending member by pressing the liquid sending member by the second member from an outside of the liquid sending member, and thus, it is possible to miniaturize the liquid spray nozzle.
A liquid spray nozzle according to a second aspect of the present disclosure is an aspect according to the first aspect, and the liquid spray nozzle further includes a spray tip end section spaced apart from the nozzle aperture by a first distance in a spray direction of the liquid, wherein the first distance is longer than a droplet formation distance until the continuous flow sprayed from the nozzle aperture changes into droplets.
According to the aspect, the first distance from the nozzle aperture to the spray tip end section is longer than the droplet formation distance. That is, when liquid is sprayed from the spray tip end section, the liquid is in a state of being changed into droplets. Therefore, even in a case where the spray tip end section is brought close to the target, it is possible to suppress liquid from colliding with the target in a state of a continuous flow, which is a state before liquid is changed into droplets. Therefore, even when the spray tip end section is brought close to the target, it is possible to cause liquid to collide with the target with strong collision pressure.
A liquid spray nozzle according to a third aspect of the present disclosure is an aspect according to the first or second aspect, and the second member is in a state where a portion of the second member bites into the liquid sending member at a position facing the first member via the liquid sending member.
According to the aspect, the second member is in a state where a portion of the second member bites into the liquid sending member at a position facing the first member via the liquid sending member. With such a configuration, it is possible to suppress the second member from coming off with respect to the liquid sending member.
A liquid spray nozzle according to a fourth aspect of the present disclosure is an aspect according to the third aspect, and at a position where the second member faces the first member via the liquid sending member, a female screw section is provided in the second member, and a male screw section to be fitted to the female screw section is provided in the liquid sending member.
According to the aspect, at a position where the second member faces the first member via the liquid sending member, a female screw section is provided in the second member, and a male screw section to be fitted to the female screw section is provided in the liquid sending member. With such a configuration, it is possible to particularly effectively suppress the second member from coming off with respect to the liquid sending member.
A liquid spray nozzle according to a fifth aspect of the present disclosure is an aspect according to the first or second aspect, and the first member is in a state where a portion of the first member bites into the liquid sending member at a position facing the second member via the liquid sending member.
According to the aspect, the first member is in a state where a portion of the first member bites into the liquid sending member at a position facing the second member via the liquid sending member. With such a configuration, it is possible to suppress the first member from coming off with respect to the liquid sending member.
A liquid spray nozzle according to a sixth aspect of the present disclosure is an aspect according to the first or second aspect, and at a position where the first member and the second member face each other and are in contact with each other, a female screw section is provided in the second member, and a male screw section to be fitted to the female screw section is provided in the first member.
According to the aspect, at a position where the first member and the second member face each other and are in contact with each other, a female screw section is provided in the second member, and a male screw section to be fitted to the female screw section is provided in the first member. With such a configuration, it is possible to particularly effectively suppress the second member from coming off with respect to the first member.
A liquid spray nozzle according to a seventh aspect of the present disclosure is an aspect according to the first or second aspect, and the first member includes a facing region that faces the nozzle pressing member, the first member is provided with a female screw section in the facing region, and the nozzle pressing member is provided with a male screw section to be fitted to the female screw section in the facing region.
According to the aspect, the first member is provided with a female screw section in the facing region, and the nozzle pressing member is provided with a male screw section to be fitted to the female screw section in the facing region. With such a configuration, it is possible to effectively suppress the nozzle pressing member from being detached from the liquid spray nozzle, and it is possible to effectively suppress a situation in which the nozzle pressing member is detached and the nozzle member cannot be pressed and fixed to the first member.
A liquid spray nozzle according to an eighth aspect of the present disclosure is an aspect according to the first or second aspect, and the one end of the first member is provided with a taper that is tapered so that the flowing path is widened toward a tip end.
According to the aspect, the one end of the first member is provided with a taper that is tapered so that the flowing path is widened toward a tip end. When liquid flows from the liquid sending member to the flowing path of the first member, turbulent flow is likely to be generated in the vicinity of the one end of the first member due to a step between the liquid sending member and the one end of the first member, and when turbulent flow is generated, there is a concern that the flow speed of the liquid may decrease. However, by providing the taper at one end of the first member in such a configuration, it is possible to reduce the step between the liquid sending member and the one end of the first member, and to suppress a decrease in the flow speed of liquid.
A liquid spray nozzle according to a ninth aspect of the present disclosure is an aspect according to the first or second aspect, and the second member is configured to cover an outside of the nozzle pressing member.
According to the aspect, the second member is configured to cover an outside of the nozzle pressing member. With such a configuration, it is possible to easily suppress the nozzle pressing member from being detached from the liquid spray nozzle, and it is possible to easily suppress a situation where the nozzle pressing member is detached and the nozzle member cannot be pressed and fixed to the first member.
A liquid spray device according to a tenth aspect of the present disclosure includes a liquid spray nozzle of an aspect according to the first or second aspect and a pump connected to the liquid spray nozzle.
According to the aspect, the liquid spray device includes the pump connected to the liquid spray nozzle. With such a configuration, liquid can be suitably supplied to the nozzle member of the liquid spray nozzle, and liquid can be sprayed with a strong spray pressure.
A liquid spray device according to an eleventh aspect of the present disclosure includes a liquid spray nozzle of an aspect according to the first or second aspect; a syringe connected to the liquid spray nozzle; and a piston configured to move the syringe.
According to the aspect, the liquid spray device includes the syringe connected to the liquid spray nozzle and the piston configured to move the syringe. Therefore, it is possible to suitably send liquid to the nozzle member of the liquid spray nozzle with a simple configuration.
Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. A liquid spray nozzle 1 is capable of spraying liquid 3 in a continuous flow 3a, changing the continuous flow 3a into droplets 3b, and causing the liquid 3 collide with a target in the droplet 3b state. First, a liquid spray nozzle 1A according to a first embodiment, which is an example of the liquid spray nozzle 1 of the present disclosure, will be described with reference to
The liquid spray nozzle 1A of the present embodiment shown in
As with the liquid spray nozzle 1A of the present embodiment, by spraying the liquid 3 in the continuous flow 3a and forming the continuous flow 3a into the droplets 3b to collide with a target in the droplet 3b form, collision pressure by the liquid 3 is remarkably improved as compared with a configuration in which the liquid 3 is simply sprayed in the continuous flow 3a to collide with the target in the continuous flow 3a. As in the liquid spray nozzle 1A of the present embodiment, the liquid spray nozzle 1 can be miniaturized by adopting a configuration in which the one end 4b of the first member 4, to which the nozzle member 5 is fixed by the nozzle pressing member 6, is inserted into the flow path 2a and, in this state, the one end 4b is fixed to the liquid sending member 2 by pressing the liquid sending member 2 by the second member 7 from outside the liquid sending member 2.
By using the liquid spray nozzle 1A of the present embodiment, it is possible to efficiently wash inner walls of containers that are long in the height direction, such as bottles with narrow mouths, such as baby bottles, and the like. In general, when washing a container that is tall in the height direction, there is a long distance from the nozzle member 5 to the target to be washed on which the droplets 3b land, so there is a risk that the spray speed of the droplets 3b attenuates, collision pressure is reduced, and washing power decreases. However, when a small-sized liquid spray nozzle 1 such as the liquid spray nozzle 1A of the present embodiment is used, it is possible to cause the droplets 3b to collide with a target to be washed while appropriately adjusting landing distances, and it is possible to suppress a decrease in washing power which may occur due to a structure of the liquid spray nozzle 1.
In the liquid spray nozzle 1A of the present embodiment, the liquid sending member 2 is a tube made of resins such as polyamide synthetic resin and polyetheretherketone resin. As the liquid sending member 2, for example, a member having a pressure resistance of 10 MPa or more and 20 MPa or less, and a member having an outer diameter of 1 mm or more and an inner diameter of 0.5 mm or more can be desirably used. In the liquid spray nozzle 1A of the present embodiment, the nozzle pressing member 6 is an annular metal rigid member in which an aperture section 6a constituting a flow path of the liquid 3 is formed. However, the configuration of the liquid sending member 2 and the nozzle pressing member 6 is not particularly limited.
In the liquid spray nozzle 1A of the present embodiment, the first member 4 and the second member 7 are made of metal, but the materials and shapes of the first member 4 and the second member 7 are not particularly limited. Furthermore, the nozzle member 5 in the liquid spray nozzle 1A of the present embodiment is a disk-shaped component made of metal with high tensile strength, such as stainless steel or nickel, and one or a plurality of nozzle apertures 5a, ranging from φ0.01 to φ0.15 mm, are formed, but there is no particular limitation on the material and shape of the nozzle member 5, nor on the shape and the number of nozzle apertures 5a formed. Here, in a case where the diameter of the aperture section 6a of the nozzle pressing member 6 is φ0.5 mm, the formation pitch of the nozzle apertures 5a between the nozzle apertures 5a when arranging a plurality of nozzle apertures 5a is in a range of ten times or more the diameter of the nozzle aperture 5a or 0.2 mm or less, and the number of apertures that can be arranged is provided in accordance with the diameter of the nozzle aperture 5a. The thickness of the nozzle member 5 may be, for example, in the range of 0.05 mm or more and 0.5 mm or less, and the nozzle aperture 5a can be formed by a method selected from drilling, etching, punching, and the like, and by forming in this manner, a small-sized liquid spray nozzle 1 can be produced.
Here, the diameter of the flowing path 4a of the first member 4 is desirably ten times or more and fifty times or less the diameter of the nozzle aperture 5a, and more desirably ten times or more and twenty times or less the diameter of the nozzle aperture 5a. It is desirable that the thickness of the second member 7 at a position R1 where the liquid sending member 2 is pressed is 0.8 times or more and 1.2 times or less the thickness of the liquid sending member 2. Further, in order to prevent the liquid spray nozzle 1 from becoming too large, it is desirable that the outer diameter of the second member 7 at the position R1 pressing the liquid sending member 2 is 1.4 times or less the outer diameter of the liquid sending member 2. The second member 7 is formed with an aperture section 7b connected to the nozzle aperture 5a of the nozzle member 5 and the aperture section 6a of the nozzle pressing member 6, but the diameter of the aperture section 7b is not particularly limited. However, the diameter of the aperture section 7b is desirably larger than the diameter of the nozzle aperture 5a.
As shown in
Since the liquid spray nozzle 1A of the present embodiment includes such a configuration, even when the spray tip end section 7a is brought close to a target, it is possible to suppress the liquid 3 from colliding with the target in a state of the continuous flow 3a which is a state before the liquid 3 is formed into droplets 3b. Therefore, the liquid spray nozzle 1A of the present embodiment can cause the liquid 3 to collide with a target not in a state of the continuous flow 3a but in a state of droplets 3b even when the spray tip end section 7a is brought close to a target, and can cause the liquid 3 to collide with a target with strong collision pressure.
Further, as shown in
Further, as shown in
As shown in
In other words, at the position R1 in the liquid spray nozzle 1A of the present embodiment, where the first member 4 faces the second member 7 via the liquid sending member 2, which is the position at which the indentations and protrusions 4c are formed, the first member 4 is in a state in which a portion of the liquid sending member 2 bites into the first member 4 by the liquid sending member 2 partially entering into recess sections of the indentations and protrusions 4c. With such a configuration, it is possible to suppress the first member 4 from coming off with respect to the liquid sending member 2. Note that a state in which a portion of the liquid sending member 2 bites into something means a structure in which in the cross-sectional shape, a portion of the liquid sending member 2 enters into the first member 4, for example, as a structure other than the present embodiment, the first member 4 and the liquid sending member 2 may be a structure in which indentations and protrusions such as a helical screw groove are provided in advance to fit the indentations and protrusions of both.
Hereinafter, a liquid spray nozzle 1B of a second embodiment will be described with reference to
As shown in
In the liquid spray nozzle 1B of the present embodiment, the angle θ of the taper 4d with respect to the flow path 2a is about 30°. Although there is no particular limitation on the angle, in order to effectively exert the effect of suppressing turbulent flow, or to avoid the cross-sectional area of a flow path of the liquid 3 being suddenly reduced, it is desirably 30° or less.
Hereinafter, a liquid spray nozzle 1C of a third embodiment will be described with reference to
As shown in
As shown in
As shown in
When assembling the liquid spray nozzle 1C of the present embodiment, first, after setting the nozzle member 5, the female screw section 8D and the male screw section 8C are fit together to fix the first member 4 and the nozzle pressing member 6, then the female screw section 8F and the male screw section 8E are fit together to fix the first member 4 and the second member 7, and finally the female screw section 8B and the male screw section 8A are fit together to fix the second member 7 and the liquid sending member 2 performed in this order. The position and the number of a screw fixing sections 8, which fix a female screw section and a male screw section by fitting the female screw section and the male screw section together, are not limited to those of the liquid spray nozzle 1C of the present embodiment. For example, the male screw section 8A and the female screw section 8B, and the male screw section 8C and the female screw section 8D may be omitted, and only the female screw section 8F of the second member 7 and the male screw section 8E of the first member 4 may be provided as the screw fixing section 8, and when such a screw fixing section 8 is provided, any constituent member of the liquid spray nozzle 1 is less likely to come off.
Hereinafter, a liquid spray nozzle 1D of a fourth embodiment will be described with reference to
As shown in
The liquid spray nozzle 1D of the present embodiment passes a hard tube, such as polyamide synthetic resin or polyetheretherketone resin, which is the liquid sending member 2, through the second member 7 as a joint member, and press-fits the first member 4, which is a tube nipple as a joint member, into the flow path 2a, which is an inner diameter section of the liquid sending member 2. As shown in
Here, as shown in
With such a configuration, the nozzle member 5 in which the nozzle aperture 5a is formed is easily attached, detached, or replaced, and washing of the nozzle member 5, replacement of the nozzle member 5 with the nozzle member 5 in which the nozzle aperture 5a having a different nozzle diameter, the different number of nozzles, or a different nozzle aperture shape is formed, and the like are easily performed. It is possible to provide a large number of inexpensive liquid spray nozzles 1, and the liquid spray nozzles 1 can be used as disposable parts in a wide range of fields such as industrial applications and consumer applications. Furthermore, it can be applied to medical applications by making each component suitable for medical use, such as using materials that can undergo a sterilization process for each component. The liquid spray nozzle 1D of the present embodiment is configured to be able to spray liquid at a maximum pressure of about 10 MPa.
As shown in
Hereinafter, a liquid spray device 10A as a fifth embodiment, which is an example of a liquid spray device 10 to which the liquid spray nozzle 1 of the first to fourth embodiments can be mounted, will be described.
As shown in
Hereinafter, a liquid spray device 10B as a sixth embodiment, which is an example of the liquid spray device 10 to which the liquid spray nozzle 1 of the first to fourth embodiments can be mounted, will be described.
As shown in
The present disclosure is not limited to the above-described embodiments, and can be realized by various configurations without departing from the scope of the disclosure. The technical features in the present embodiments corresponding to the technical features in each aspect described in the summary of the disclosure can be appropriately replaced or combined in order to solve a part or all of the problems described above or in order to achieve a part or all of the effects described above. In addition, unless the technical features are described as essential in the present specification, the technical features can be appropriately deleted.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2023-112260 | Jul 2023 | JP | national |
