Patent Application
20150277451
The present invention relates to a driving apparatus and a valve including the same.
Currently, in a driving apparatus and a valve including the driving apparatus, such as an actuator and a regulating valve, for example, in a valve 1 shown in
The present invention provides a driving apparatus and a valve including the same, which can limit the rotation of the drive shaft, so as to protect the sensing device from being damaged.
In one aspect, an example of the present invention provides a driving apparatus. The driving apparatus senses a pressure of a medium and generating a driving force, and includes: a drive shaft, a sensing device, a limiting device, and a support body, where the drive shaft extends through the sensing device, the limiting device and the support body, and one end of the drive shaft is connected to the sensing device; and the limiting device is provided with a groove, the support body is provided with a protruding member, and the protruding member is engaged in the groove; or the limiting device is provided with a protruding member, the support body is provided with a groove, and the protruding member is engaged in the groove.
In the driving apparatus, the limiting device is a cylinder with a central hole, and the groove on the limiting device is an arc groove extending inward along an outer surface of the cylinder.
In the driving apparatus, the arc groove of the limiting device is at least one, and is evenly distributed on the limiting device.
In the driving apparatus, the limiting device further includes a positioning key, the drive shaft is provided with a first key groove, an inner wall of the central hole of the limiting device is provided with a second key groove, and the positioning key can be located in the first key groove and the second key groove at the same time.
In the driving apparatus, the drive shaft is a stepped shaft and has a step, the inner wall of the central hole of the limiting device is further provided with a projecting portion, the projecting portion of the limiting device is supported by the step of the drive shaft, and the second key groove is provided on the projecting portion.
In the driving apparatus, the groove is in clearance fit with the protruding member.
In another aspect, the present invention further provides a valve, including a valve core assembly and a valve body, the valve core assembly being arranged in the valve body, and the valve includes the driving apparatus according to any one of claims 1 to 6 and a connecting component; and the other end of the drive shaft of the driving apparatus is connected to the valve core assembly, and the connecting component connects the driving apparatus and the valve body.
In still another aspect, the present invention further provides another valve, including a valve body, a limiting device and a drive shaft, where the drive shaft is arranged in the valve body, the limiting device is sleeved on the drive shaft; and the limiting device is provided with a groove, the valve body is provided with a protruding member, and the protruding member is mated in the groove; or the limiting device is provided with a protruding member, the valve body is provided with a groove, and the protruding member is engaged in the groove.
In the valve, the limiting device is a cylinder with a central hole, the groove on the limiting device is an arc groove extending inward along an outer surface of the cylinder, the arc groove is at least one, and is evenly distributed on the limiting device.
The valve is a pressure regulating valve, a back pressure valve, or a control valve.
According to the driving apparatus and the valve including the same that are provided by the present invention, as the limiting device with a groove is provided, the limiting device may be located in the driving apparatus or may be located on the drive shaft in the valve body of the valve, and the groove of the limiting device is mated with the protruding member, so that during installation and maintenance of the valve core assembly, the spring cartridge does not need to be removed to clamp the clamping surface at the upper end of the drive shaft, and the drive shaft can be prevented from rotating excessively to drive the connected sensing device to rotate, thereby preventing damage to the sensing device. Such a design greatly facilitates maintenance and installation of the valve.
The technical solutions of the present invention are described in further detail below with reference to the accompanying drawings and specific embodiments.
The present invention provides a example of a driving apparatus, which can sense a pressure of a medium and generate a driving force. The driving apparatus 2 includes a drive shaft 21, a sensing device 22, a limiting device 23 and a support body 24. The drive shaft 21 extends through the sensing device 22, the limiting device 23, and the support body 24, the limiting device is supported by the support body, and the support body may be a housing that forms a sensing cavity of the driving apparatus, or may be a valve body or an upper valve cover. Correspondingly, the limiting device may be located in the sensing cavity inside the driving apparatus, or located on the valve body outside the driving apparatus.
Preferably, as shown in
In one aspect, the limiting device 23 is a cylinder with a central hole, a groove 27 extends inward along an outer surface of the cylinder, and the limiting device 23 is sleeved on the drive shaft 21 and located below the sensing device 22, the support body 24 is provided with a protruding member 25, and the protruding member 25 is engaged in the groove 27 with clearance fit. Therefore, when the drive shaft receives a rotating force, the protruding member 25 on the support body 24 can limit the rotation of the limiting device, and thus limit the amount of rotation of the drive shaft, to avoid damaging the sensing device 22 connected to the drive shaft 21 caused by rotation. The sensing device may specifically be a film. The limiting device can protect the film from being damaged.
In addition, the support body of the driving apparatus in this example of the present invention is further provided with a protruding connecting component, for connecting the driving apparatus and other devices mated with the driving apparatus. Therefore, the connecting component may be used as the protruding member to mate with the groove of the limiting device, so as to limit the rotation of the drive shaft, thereby preventing damage to the sensing device. Specifically, the connecting component may be a screw, a pin or the like.
In addition, the groove on the limiting device is at least one, and the protruding member may be correspondingly mated in the groove, and maintain a clearance fit with the groove. Preferably, the groove is an arc groove extending inward along the outer surface of the cylinder, the amount of the grooves may be four, and the four arc grooves are evenly distributed on the limiting device.
Further, because the limiting device is sleeved on the drive shaft, an inner wall of the central hole of the limiting device may further be provided with a positioning key. Specifically, in a driving apparatus 3 shown in
Optionally,
Optionally, the inner wall of the limiting device of the present invention may also be provided with an annular groove for receiving an elastic element such as an O-ring, so as to provide a sealing effect.
In another aspect, the limiting device is sleeved on the drive shaft and located below the sensing device, the limiting device is provided with a protruding member, the support body is provided with a groove, and the protruding member is in clearance fit with the groove. Similarly, when the drive shaft receives a rotating force, because the protruding member of the limiting device is engaged in the groove of the support body, the amount of rotation of the drive shaft can be limited, preventing damage to the sensing device connected to the drive shaft caused by rotation.
The present invention provides a example of a valve 5. The valve may include any one of the driving apparatuses described in Example 1. Preferably, as shown in
During maintenance and installation of the valve 5, a fastener 54 of the second end of the drive shaft needs to be rotated and drived to remove the valve core assembly; however, when the fastener 54 is rotated, the drive shaft is driven to rotate along with the fastener 54. Because the first end of the drive shaft is connected to the sensing device 502, the rotation of the drive shaft drives the sensing device to rotate, but excessive rotation of the drive shaft may cause damage to the sensing device. Because the valve is provided with the limiting device 503, and the limiting device 503 is mated with the connecting component 53 to limit the rotation of the drive shaft, damage to the sensing device is further prevented. The sensing device may be a film, but is not limited thereto.
Optionally, the inner wall of the central hole 506 of the limiting device may further be provided with threads, and the limiting device can be fixedly screwed onto the drive shaft by means of the threads.
As in Example 1, the groove on the limiting device is at least one, and the connecting component 53 may be correspondingly mated in the groove 505, and maintain a clearance fit with the groove. Preferably, the groove 505 is an arc groove extending inward along the outer surface of the cylinder, the amount of the arc grooves may be four, and the four arc grooves are evenly distributed on the limiting device.
As in Example 1, the inner wall of the central hole of the limiting device of the present invention may also be provided with an annular groove for receiving an elastic element such as an O-ring, so as to provide a sealing effect.
This example of the present invention provides a variation of the valve of Example 2, which is specifically characterized in that the limiting device can be sleeved at other positions on the drive shaft, which can also prevent axial rotation of the drive shaft, protecting the sensing device from being damaged;
Specifically, the valve includes a valve body, a limiting device, and a drive shaft, where the drive shaft is partially located in the valve body, the limiting device is sleeved on the drive shaft, the limiting device is provided with a groove, the valve body is provided with a protruding member, and the protruding member is mated in the groove of the limiting device.
Further, the groove of the limiting device is at least one, and the protruding member may be correspondingly mated in the groove, and maintain a clearance fit with the groove. Preferably, the limiting device is a cylinder with a central hole, the groove on the limiting device may be an arc groove extending inward along an outer surface of the cylinder, the amount of the groove may be four, and the four arc grooves are evenly distributed on the limiting device.
The valve of the present invention may specifically be a pressure regulating valve, a back pressure valve, or a control valve, but is not limited thereto.
It should be noted that as used herein, the terms “comprises”, “comprising” or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such a process, method, article, or apparatus. An element proceeded by “a”, “an”, or the like does not, without more constraints, preclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.
The above descriptions are merely preferred examples of the present invention, and are not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, or improvements made within the spirit and principle of the present invention shall be encompassed in the protection scope of the present invention.
| Number | Date | Country | Kind |
|---|---|---|---|
| 201220566015.0 | Oct 2012 | CN | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/CN13/85713 | 10/22/2013 | WO | 00 |
