CN212156010U - Device for protecting set pressure of safety valve from being influenced by external force - Google Patents
Device for protecting set pressure of safety valve from being influenced by external force Download PDFInfo
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- CN212156010U CN212156010U CN202020138523.3U CN202020138523U CN212156010U CN 212156010 U CN212156010 U CN 212156010U CN 202020138523 U CN202020138523 U CN 202020138523U CN 212156010 U CN212156010 U CN 212156010U
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Abstract
The utility model relates to a device that settlement pressure of protection relief valve does not receive external force to influence, can dismantle fixed connection including the valve body upper end spring housing, spring housing inner chamber are provided with the valve rod, embolia the screw rod above the valve rod, and the drive shaft is adjusted as relief valve main spring's clamp plate, and rubber O type circle is gone into to the side fluting at the clamp plate simultaneously in the inslot, makes the outer contact that produces pressure along the inner chamber edge with relief valve spring housing of O type circle, produces frictional force, and then the removal of restriction top board. When the pressure plate of the safety valve spring finishes the setting of the working pressure of the main spring, the friction force can provide a position fixing effect for the pressure plate, and the pressure of the main spring cannot be influenced in the states of transportation, vibration, inversion, working and the like, so that the screw thread between the screw rod and the pressure plate does not rotate any more and is in a locking state, and the working pressure of the safety valve is ensured to be always on the set value required by a customer.
Description
Technical Field
The utility model belongs to a screw thread self-lock device, concretely relates to protection relief valve's settlement pressure does not receive the device of external force influence.
Background
The safety valve is a special valve, wherein the opening and closing part is in a normally closed state under the action of external force, and when the pressure of a medium in equipment or a pipeline rises to exceed a specified value, the medium is discharged to the outside of the system to prevent the pressure of the medium in the pipeline or the equipment from exceeding the specified value. The safety valve is mainly used for boiler, pressure container and pipeline, and its control pressure is not greater than specified value, so that it can play important role in protecting personal safety and equipment operation. The injection and safety valve must be pressure tested before it can be used. The safety valve plays a safety protection role in the system. When the system pressure exceeds the specified value, the safety valve is opened to discharge a part of gas/fluid in the system to the outside of the atmosphere/pipeline, so that the system pressure does not exceed the allowable value, and the system is ensured not to have accidents due to overhigh pressure.
Traditional relief valve is in the transportation, vibrations, and reverse, all probably cause the removal of top board under the state such as work, and then cause the influence to the set pressure of relief valve, can not ensure that the set pressure of relief valve is in a fixed value all the time, consequently can cause the influence to system pressure in the use of relief valve to can not guarantee that the system causes the influence because of the pressure is too high or low, also can be because of the too high emergence accident of pressure.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the not enough of above-mentioned prior art, provide a device that the settlement pressure of protection relief valve does not receive external force to influence, can ensure steadily that the settlement pressure of relief valve is in on the fixed value all the time. In order to achieve the above purpose, the utility model adopts the technical scheme that: a device for protecting the set pressure of a safety valve from being influenced by external force comprises a valve body, wherein a feed inlet is formed in the lower portion of the valve body, a discharge outlet is formed in the side portion of the valve body, a valve plate, an upper valve cover, an upper pressing cap, a guide block and a sliding bearing are sequentially arranged on the upper portion of the feed inlet of the valve body from bottom to top, one end of the valve plate is matched with the top end of the feed inlet, the other end of the valve plate is arranged into a cylinder, a steel ball is arranged in the cylinder, a first end of a valve rod is inserted into the cylinder and abutted against the steel ball, the upper valve cover is sleeved outside the cylinder of the valve plate, the; the valve rod is also sleeved with a guide block, and the guide block is matched with the valve rod through a sliding bearing;
the bottom of the guide block is provided with a cavity matched with an upper pressing cap, and the upper pressing cap is connected with the upper valve cover in a clamping manner to connect the diaphragm; the second end of the valve rod penetrates through the upper pressing cap and the guide block from the inner cavity of the valve body and extends to the outside of the valve body;
the upper end of the valve body is detachably and fixedly connected with the spring housing; the spring cover comprises a spring cover shell, a spring cover plate, a valve cap and a sealing cover, wherein the spring cover shell is sequentially assembled at the top of the spring cover shell from bottom to top, a screw rod is sleeved at the second end of the valve rod in a sliding manner, the screw rod is assembled with the spring cover shell, an upper pressing plate and a lower pressing plate are installed in an inner cavity of the spring cover shell, the upper pressing plate is sleeved on the screw rod, the lower pressing plate is fixedly connected to the position, close to the first end, of the valve rod, the spring cover is arranged outside the screw rod;
a groove is formed in the side edge of the upper pressure plate, and an O-shaped ring is sleeved in the groove, so that the outer edge of the O-shaped ring is in contact with the edge of an inner cavity of the safety valve spring housing, and friction force is also generated for the movement of the upper pressure plate.
Preferably, the O-shaped ring is made of rubber materials.
Preferably, the valve rod and the screw rod are both vertically arranged inside the spring housing.
Preferably, the spring housing comprises a first inner cavity and a second inner cavity which are arranged up and down, and the diameter of the first inner cavity is smaller than that of the second inner cavity.
Preferably, the spring housing cover plate is in threaded connection with the spring housing.
Preferably, the spring cover is in fit connection with the upper pressure plate and in threaded connection with the spring cover plate.
Preferably, the spring housing cover plate is in snap fit connection with the valve cap.
The utility model has the advantages that: the outer edge of the rubber O-shaped ring is in certain pressure contact with the edge of the inner cavity of the safety valve spring cover, so that friction force is provided for the movement of the upper pressure plate. When the pressure plate of the safety valve spring finishes the setting of the working pressure of the main spring, the friction force can provide a position fixing effect for the pressure plate, and the pressure of the main spring cannot be influenced in the states of transportation, vibration, inversion, working and the like, so that the screw thread between the screw rod and the pressure plate does not rotate any more and is in a locking state, and the working pressure of the safety valve is ensured to be always on the set value required by a customer.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the screw self-locking mechanism of the present invention;
1. a valve body; 2. a screw; 3. a gasket; 4. an upper pressure plate; 5. a circlip for the shaft; 6. a guide block; 7. a sliding bearing; 8. a spring housing; 9. a spring cage cover plate; 10. a bonnet; 11. clamping a hoop; 12. an O-shaped ring; 13. sealing the cover; 14. an O-shaped ring; 15. a valve plate; 16. a valve stem; 17. a gasket; 18. an upper valve cover; 19. an O-shaped ring; 20. a steel ball; 21. a diaphragm; 22. pressing the cap upwards; 23. a steel wire retainer ring for the shaft; 24. a lower pressing plate; 25. a circlip for the shaft; 26. a spring; 27. a circlip for the shaft; 28. an inner cavity of the valve body; 29. a slope structure; 30. a valve body; 31. a first lumen; 32. a second lumen; 33. a feed inlet; 34. discharge port
Detailed Description
The utility model provides a set pressure of protection relief valve does not receive the device of external force influence. The technical solution of the present invention will be described in detail below with reference to the accompanying drawings so as to be easier to understand and grasp.
Example 1
As shown in fig. 1 and 2, the present invention provides a device for protecting the set pressure of a safety valve from external force, which comprises a valve body 30, the lower part of the valve body 30 is provided with a feed inlet 33, the lateral part is provided with a discharge outlet 34, the diameter of the feed inlet 33 is smaller than that of the discharge outlet 34, the diameter of the feed port 33 is smaller than that of the inner cavity of the spring housing 8, the upper part of the feed port 33 of the valve body 30 is sequentially provided with a valve plate 15, an upper valve cover 18, an upper pressing cap 22, a guide block 6 and a sliding bearing 7 from bottom to top, one end of the valve plate 15 is matched with the top end of the feed port 33, the other end is provided with a cylinder, a steel ball 20 is arranged in the cylinder, the steel ball 20 is made of hard alloy, the first end of the valve rod 16 is inserted into the cylinder and is abutted against the steel ball 20, the upper valve cover 18 is sleeved outside the cylinder of the valve plate 15, the valve rod 16 is sleeved with an upper pressure cap 22, and a protruding part at the lower end of the upper pressure cap 22 is clamped and connected with the upper valve cover 18; the valve rod 16 is also sleeved with a guide block 6, and the guide block 6 is matched with the valve rod 16 through a sliding bearing 7.
The bottom of the guide block 6 is provided with a cavity matched with an upper pressing cap 22, the upper pressing cap 22 and the upper valve cover 18 are connected with a diaphragm 21 in a clamping mode, and the second end of the valve rod 16 penetrates through the upper pressing cap 22 and the guide block 6 from a valve body inner cavity 28 and extends to the outside of a valve body 30; the utility model discloses a valve, including spring housing 8, valve plate, valve cover 18, O type ring 19, O type ring 12 is right between the guide block 6, spring housing cover 8 with certain sealed effect is played in the cooperation of guide block 6, the valve rod 16 lower extreme with for axle steel wire retainer ring 23 between the draw-in groove that last gland 22 set up, axle steel wire retainer ring 23 is used for fixing the axial motion of valve rod 16, the top of the inside feed inlet 33 of valve body inner chamber 28, valve plate 15 with go up and be O type ring 19 between the valve cover 18, O type ring 19 is right the top of the inside feed inlet 33 of valve body inner chamber 28, valve plate 15 with the cooperation between the last valve cover 18 plays certain sealed effect.
The upper end of the valve body 30 is detachably and fixedly connected with the spring housing 8; the top of the spring housing 8 is sequentially provided with a spring housing cover plate 9, a valve cap 10 and a sealing cover 13 from bottom to top, a screw rod 2 is slidably sleeved at the second end of the valve rod 16, the screw rod 2 is assembled with the spring housing cover plate 9, an upper pressure plate 4 and a lower pressure plate 24 are arranged in an inner cavity of the spring housing 8, the upper pressure plate 4 is sleeved on the screw rod 2, the lower pressure plate 24 is fixedly connected to the position, close to the first end, of the valve rod 16, a spring 26 is sleeved outside the screw rod 2, and the spring 26 is abutted between the upper pressure plate 4 and the lower pressure plate 24; the spring cover plate 9 is connected with the screw rod 2 and the valve cap 10 in a clamping manner and is in threaded connection with the spring cover 8, and the spring cover 8 is in matched connection with the upper pressure plate 4; a cavity is arranged between the sealing cover 13 and the valve cap 10, and the sealing cover 13 is provided with a hole matched with the screw rod 2; the valve rod 16 and the screw rod 2 are both vertically arranged inside the spring housing 8.
A groove is formed in the side edge of the upper pressure plate 4, an O-shaped ring 14 is sleeved in the groove, the outer edge of the O-shaped ring 14 is just in certain contact with the edge of the inner cavity of the safety valve spring housing 8, and friction force is also generated for the movement of the upper pressure plate 4. This frictional force provides a position fixing effect on the upper pressure plate 4 when the upper pressure plate 4 of the relief valve spring 26 is at the completion of the main spring working pressure setting.
Valve body 30 with spring housing 8 adopts 11 swing joint of clamp, 8 inner chambers of spring housing include the first inner chamber 31 and the second inner chamber 32 that set up from top to bottom, first inner chamber 31 diameter is less than second inner chamber 32 diameter, valve body 30 bottom is provided with valve seat 1, valve seat 1 is round platform shape structure.
The process flow is as follows: a circle of O-shaped circular grooves are turned on the outer edge of an upper pressure plate 4 of a spring 26, rubber O-shaped rings 14 are arranged in the grooves, then the rubber O-shaped rings are sleeved into a screw rod 2, the O-shaped rings 14 and the inner wall of a spring housing 8 generate friction, and when the upper pressure plate 4 is adjusted up and down, the friction force between the O-shaped rings 14 and the inner wall of the spring housing 8 just ensures that the position of the upper pressure plate 4 is fixed and is not changed.
The above technical solutions of the present invention have been fully described, and it should be noted that the present invention is not limited by the above description, and all technical solutions formed by equivalent transformation or equivalent transformation adopted by the spirit of the present invention in the aspects of structure, method or function by those of ordinary skill in the art all fall within the protection scope of the present invention.
Claims (7)
1. A device for protecting the set pressure of a safety valve from being influenced by external force is characterized by comprising a valve body, wherein a feed inlet is formed in the lower portion of the valve body, a discharge outlet is formed in the side portion of the valve body, a valve plate, an upper valve cover, an upper pressing cap, a guide block and a sliding bearing are sequentially arranged on the upper portion of the feed inlet of the valve body from bottom to top, one end of the valve plate is matched with the top end of the feed inlet, the other end of the valve plate is arranged into a cylinder, a steel ball is arranged in the cylinder, a first end of a valve rod is inserted into the cylinder and abutted against the steel ball, the upper valve cover is sleeved outside the cylinder of the valve plate, an upper; the valve rod is also sleeved with a guide block, and the guide block is matched with the valve rod through a sliding bearing;
the bottom of the guide block is provided with a cavity matched with an upper pressing cap, and the upper pressing cap is connected with the upper valve cover in a clamping manner to connect the diaphragm; the second end of the valve rod penetrates through the upper pressing cap and the guide block from the inner cavity of the valve body and extends to the outside of the valve body;
the upper end of the valve body is detachably and fixedly connected with a spring housing; the spring cover comprises a spring cover shell, a spring cover plate, a valve cap and a sealing cover, wherein the spring cover shell is sequentially assembled at the top of the spring cover shell from bottom to top, a screw rod is sleeved at the second end of the valve rod in a sliding manner, the screw rod is assembled with the spring cover shell, an upper pressing plate and a lower pressing plate are installed in an inner cavity of the spring cover shell, the upper pressing plate is sleeved on the screw rod, the lower pressing plate is fixedly connected to the position, close to the first end, of the valve rod, the spring cover is arranged outside the screw rod;
a groove is formed in the side edge of the upper pressure plate, an O-shaped ring is sleeved in the groove, so that the outer edge of the O-shaped ring is in contact with the edge of the inner cavity of the safety valve spring housing to generate friction force, and the movement of the upper pressure plate is limited.
2. The apparatus of claim 1, wherein the O-ring is made of rubber.
3. The apparatus of claim 1, wherein the valve stem and the threaded rod are vertically disposed within the spring housing.
4. The apparatus of claim 1, wherein the spring housing includes a first inner chamber and a second inner chamber disposed one above the other, the first inner chamber having a diameter smaller than the second inner chamber.
5. The apparatus for protecting a set pressure of a safety valve according to claim 1, wherein the spring housing cover plate is screw-coupled to the spring housing.
6. The apparatus of claim 1, wherein the spring housing is cooperatively connected to the upper platen and threadably connected to the spring housing plate.
7. The apparatus of claim 1, wherein the spring-loaded cap is snap-fit into engagement with the bonnet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020138523.3U CN212156010U (en) | 2020-01-21 | 2020-01-21 | Device for protecting set pressure of safety valve from being influenced by external force |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020138523.3U CN212156010U (en) | 2020-01-21 | 2020-01-21 | Device for protecting set pressure of safety valve from being influenced by external force |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212156010U true CN212156010U (en) | 2020-12-15 |
Family
ID=73711384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020138523.3U Active CN212156010U (en) | 2020-01-21 | 2020-01-21 | Device for protecting set pressure of safety valve from being influenced by external force |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212156010U (en) |
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2020
- 2020-01-21 CN CN202020138523.3U patent/CN212156010U/en active Active
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Legal Events
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210531 Address after: 201306 building C, No. 888, Huanhu West 2nd Road, Lingang New District, China (Shanghai) pilot Free Trade Zone, Pudong New Area, Shanghai Patentee after: Jungman valve (Shanghai) Co.,Ltd. Address before: 201800 room 3368, area D, 3 / F, building 2, 755 Xingbang Road, Jiading District, Shanghai Patentee before: Jungman industrial equipment (Shanghai) Co.,Ltd. |