CN212030908U - Safety valve performance test tool - Google Patents
Safety valve performance test tool Download PDFInfo
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- CN212030908U CN212030908U CN202021175388.6U CN202021175388U CN212030908U CN 212030908 U CN212030908 U CN 212030908U CN 202021175388 U CN202021175388 U CN 202021175388U CN 212030908 U CN212030908 U CN 212030908U
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Abstract
The utility model relates to a relief valve capability test frock, include: the cylinder body is internally provided with a hollow inner cavity, one end of the cylinder body is provided with a pressure input end and a first opening, the other end of the cylinder body is provided with a valve body connecting end and a second opening, and the first opening and the second opening are communicated with the inner cavity; and the piston is positioned in the inner cavity and can slide up and down relative to the cylinder body. The utility model has simplified structure, reduces the influence of the processing error of the upper part on the experimental result, has high reliability of the experimental result, and is beneficial to the development and the structural optimization of products; the structure is simple, the processing and the calculation are convenient, the installation and the disassembly are convenient, and the damage is not easy; the operation is convenient, simple and fast, and the structure has stronger universality through standardized design.
Description
Technical Field
The utility model belongs to the mechanical valve field relates to a relief valve capability test frock.
Background
In the prior art, performance tests (setting and sealing) of the safety valve are generally carried out after the complete machine is assembled. When a new product is researched and developed, the structure and the characteristics of a sealing surface (a valve clack and a valve seat) and a guide surface (a guide sleeve and a recoil disc or a valve clack seat) are required to be researched and are also tested by using a complete machine, at the moment, the influence of parts such as a spring, a valve cover, a spring seat, an adjusting screw rod and the like on a test result needs to be considered, and the influence factors easily cause misjudgment of the test result, as shown in fig. 1.
The prior method has the following problems: the number of parts involved in the test is too many, and the superposition of machining errors of the parts can have great influence on the result; when the pressure of the spring is adjusted, the friction force between parts can cause relative movement of the sealing surface, so that the sealing surface is damaged (particularly under the condition of high setting pressure); the gravity center of the whole safety valve structure is high, the gap between the upper parts is relatively large, and the test result is unstable due to vibration during the test, so that the reliability of the test result of the traditional safety valve performance test and tool is not high.
Disclosure of Invention
The utility model aims at providing a relief valve capability test frock to simplify relief valve capability test's experimental frock, simplify experimental operation, improve the test result reliability.
In order to achieve the above purpose, the utility model adopts the technical scheme that:
the utility model provides a relief valve capability test frock, includes:
the cylinder body is internally provided with a hollow inner cavity, one end of the cylinder body is provided with a pressure input end and a first opening, the other end of the cylinder body is provided with a valve body connecting end and a second opening, and the first opening and the second opening are communicated with the inner cavity;
and the piston is positioned in the inner cavity and can slide up and down relative to the cylinder body.
Preferably, a first groove is formed in the connecting end of the valve body of the cylinder body, and the first groove is used for positioning a guide sleeve of the safety valve, so that the stability of the device during testing is improved.
Further preferably, in the use state, a sealing member is arranged at the joint of the cylinder body and the guide sleeve of the safety valve.
Preferably, the valve body connection end of the cylinder body has a connection portion to be connected with the valve body of the safety valve.
Further preferably, the cylinder block further comprises a fastening assembly for connecting the cylinder block and a valve body of the safety valve, including a nut and a stud.
Preferably, a seal is provided between an outer circumferential surface of the piston and an inner circumferential surface of the inner chamber.
Further preferably, the sealing member is a gasket or an O-ring.
Further preferably, a second groove is formed in the outer peripheral surface of the piston, and the sealing member is arranged between the second groove and the inner peripheral surface of the inner cavity.
Preferably, the tool further comprises a pressure supply device.
Preferably, the tool further comprises a test rod.
Because of the application of the technical scheme, compared with the prior art, the utility model has the following advantages:
the utility model has simplified structure, reduces the influence of the processing error of the upper part on the experimental result, has high reliability of the experimental result, and is beneficial to the development and the structural optimization of products; the structure is simple, the processing and the calculation are convenient, the installation and the disassembly are convenient, and the damage is not easy; the operation is convenient, simple and fast, and the structure has stronger universality through standardized design.
Drawings
Fig. 1 is a schematic structural view of a safety valve.
Fig. 2 is a schematic structural diagram of the safety valve performance testing tool in this embodiment.
Fig. 3 is a schematic structural diagram of the safety valve performance testing tool in this embodiment during testing.
In the above drawings:
1. adjusting the screw rod; 2. a spring seat; 3. a valve stem; 4. a spring; 5. nuts and studs; 6. a valve cover; 7. a guide sleeve; 8. cushion blocks; 9. a kick plate; 10. a valve flap; 11. a valve body; 12. a valve seat; 13. a cylinder body; 14. a piston; 15. a pressure input; 16. a valve body connecting end; 17. an inner cavity; 18. a first opening; 19. a second opening; 20. a first groove; 21. a second groove; 22. a seal member; 23. a connecting portion; 24. a fastening assembly; 25. a seal member; 26. and (6) testing the rod.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 2, a safety valve performance test tool includes:
the safety valve comprises a cylinder body 13, wherein a hollow inner cavity 17 is formed in the cylinder body 13, one end of the cylinder body 13 is provided with a pressure input end 15 for inputting external pressure and is provided with a first opening 18, the other end of the cylinder body 13 is provided with a valve body connecting end 16, the cylinder body is connected with a valve body 11 and a guide sleeve 7 of the safety valve and is provided with a second opening 19, and the first opening 18 and the second opening 19 are communicated with the inner cavity 17;
and a piston 14, wherein the piston 14 is positioned in the inner cavity 17, and the piston 14 can slide up and down relative to the cylinder 13.
As shown in fig. 2 and 3, the valve body connecting end 16 of the cylinder 13 is provided with a first groove 20, when the valve body connecting end 16 is connected with the safety valve, the first groove 20 is used for positioning the guide sleeve 7 of the safety valve, so as to prevent the device damage and test result deviation caused by the deviation of the guide sleeve 7 under a large pressure, and in a use state, a sealing member 22 is arranged at the connection position between the cylinder 13 and the guide sleeve 7 of the safety valve.
As shown in fig. 3, the valve body connection end 16 of the cylinder 13 has a connection portion 23 connected to the valve body 11 of the safety valve, and the cylinder 13 further includes a fastening assembly 24 including a nut and a stud for connecting the cylinder 13 and the valve body 11 of the safety valve on the connection portion 23, so as to ensure the stability of the entire apparatus when a performance test of the safety valve is performed.
As shown in fig. 2 and 3, a seal 25 is provided between the outer peripheral surface of the piston 14 and the inner peripheral surface of the cavity 17. The seals 22 and 25 typically use gaskets or O-rings. The outer peripheral surface of the piston 14 is provided with a second groove 21, and a sealing member 25 is arranged between the second groove 21 and the inner peripheral surface of the inner cavity 17.
As shown in fig. 3, the tool further includes a pressure supply device for providing an external pressure, which is usually a gas source, the gas has compressibility, the tool adopts a corresponding pneumatic cylinder structure to perform pressure setting and sealing tests, so as to meet the requirements of the basic performance test of the safety valve, the tool further includes a test rod 26, and two ends of the test rod 26 are matched with the cushion block 8 and the piston 14 by using spherical surfaces.
The method for testing the performance of the safety valve is specifically described below, and the test is carried out by adopting the tool shown in fig. 2 and 3, and comprises the following steps:
the cross-sectional area of the piston 14 is set to S1, the set pressure is P1, the seal pressure is P2, and the supply pressure is P3.
Step 1, connecting a cylinder body 13 with a valve body 11 of a safety valve, fixing the cylinder body 13 and the valve body 11 by using a fastening assembly 24, arranging a sealing element 22 between the cylinder body 13 and the valve body 11 for sealing, connecting a pressure supply device with the cylinder body 13 at a pressure input end 15 through a first opening 18, checking the sealing performance of a test tool, and determining that the sealing performance is qualified if no bubbles emerge from a sealing connection surface;
step 3, applying test pressure at the inlet of the safety valve, and performing a sealing test on the valve seat 12 of the safety valve according to the standard when the test pressure at the inlet of the safety valve reaches the sealing pressure P2; and when the inlet pressure reaches the setting pressure P1, performing a setting pressure test according to the standard.
The structure of the embodiment is simplified, the influence of the machining error of upper parts (such as a spring, a valve cover, a spring seat, an adjusting screw rod and the like) on the experimental result in the existing tool is reduced, the reliability of the experimental result is high, and the product development and the structure optimization design are facilitated; this embodiment simple structure, convenient processing and calculation, installation, dismantlement convenience simultaneously, convenient operation, simple, swift do not need to adjust many times (if with the spring structure, need many times the adjustment just can reach test pressure), through standardized design, this structure has stronger commonality.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.
Claims (10)
1. The utility model provides a relief valve capability test frock which characterized in that includes:
the cylinder body is internally provided with a hollow inner cavity, one end of the cylinder body is provided with a pressure input end and a first opening, the other end of the cylinder body is provided with a valve body connecting end and a second opening, and the first opening and the second opening are communicated with the inner cavity;
and the piston is positioned in the inner cavity and can slide up and down relative to the cylinder body.
2. The safety valve performance testing tool according to claim 1, wherein a first groove is formed in the connecting end of the valve body of the cylinder body, and the first groove is used for positioning a guide sleeve of the safety valve.
3. The safety valve performance testing tool according to claim 2, wherein a sealing member is arranged at a joint of the cylinder body and the guide sleeve of the safety valve in a use state.
4. The safety valve performance testing tool according to claim 1, wherein the valve body connecting end of the cylinder body is provided with a connecting portion connected with a valve body of the safety valve.
5. The safety valve performance testing tool of claim 4, wherein the cylinder further comprises a fastening assembly for connecting the cylinder and a valve body of the safety valve.
6. The safety valve performance testing tool of claim 1, wherein a seal is arranged between the outer circumferential surface of the piston and the inner circumferential surface of the inner cavity.
7. The safety valve performance testing tool of claim 3 or 6, wherein the sealing element is a gasket or an O-ring.
8. The safety valve performance testing tool of claim 6, wherein a second groove is formed in the outer peripheral surface of the piston, and the sealing element is arranged between the second groove and the inner peripheral surface of the inner cavity.
9. The safety valve performance testing tool of claim 1, further comprising a pressure supply device.
10. The safety valve performance testing tool of claim 1, further comprising a test rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021175388.6U CN212030908U (en) | 2020-06-23 | 2020-06-23 | Safety valve performance test tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021175388.6U CN212030908U (en) | 2020-06-23 | 2020-06-23 | Safety valve performance test tool |
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| Publication Number | Publication Date |
|---|---|
| CN212030908U true CN212030908U (en) | 2020-11-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021175388.6U Active CN212030908U (en) | 2020-06-23 | 2020-06-23 | Safety valve performance test tool |
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| CN (1) | CN212030908U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111610016A (en) * | 2020-06-23 | 2020-09-01 | 吴江市东吴机械有限责任公司 | Safety valve performance testing tool and method |
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2020
- 2020-06-23 CN CN202021175388.6U patent/CN212030908U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111610016A (en) * | 2020-06-23 | 2020-09-01 | 吴江市东吴机械有限责任公司 | Safety valve performance testing tool and method |
| CN111610016B (en) * | 2020-06-23 | 2024-07-12 | 吴江市东吴机械有限责任公司 | Safety valve performance testing tool and method |
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