CN111610016B - Safety valve performance testing tool and method - Google Patents
Safety valve performance testing tool and method Download PDFInfo
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- CN111610016B CN111610016B CN202010577579.3A CN202010577579A CN111610016B CN 111610016 B CN111610016 B CN 111610016B CN 202010577579 A CN202010577579 A CN 202010577579A CN 111610016 B CN111610016 B CN 111610016B
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- safety valve
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- 238000012360 testing method Methods 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims description 6
- 238000011056 performance test Methods 0.000 claims abstract description 18
- 238000007789 sealing Methods 0.000 claims description 23
- 230000002093 peripheral effect Effects 0.000 claims description 12
- 238000013461 design Methods 0.000 abstract description 4
- 238000003754 machining Methods 0.000 abstract description 4
- 238000012356 Product development Methods 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract description 3
- 238000005457 optimization Methods 0.000 abstract description 3
- 238000012545 processing Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/003—Machine valves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/06—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing bubbles in a liquid pool
- G01M3/08—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing bubbles in a liquid pool for pipes, cables or tubes; for pipe joints or seals; for valves; for welds
- G01M3/086—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing bubbles in a liquid pool for pipes, cables or tubes; for pipe joints or seals; for valves; for welds for valves
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Safety Valves (AREA)
Abstract
The invention relates to a safety valve performance test fixture, which comprises: 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 is provided with a first opening, the other end of the cylinder body is provided with a valve body connecting end and is provided with a second opening, and the first opening and the second opening are communicated with the inner cavity; the piston is positioned in the inner cavity and can slide up and down relative to the cylinder body. A safety valve performance testing method adopts the safety valve performance testing tool to conduct testing. The invention has the advantages of simplified structure, reduced influence of upper part machining errors on experimental results, high experimental result reliability, and contribution to product development and structure optimization; the structure is simple, the processing and calculation are convenient, the installation and the disassembly are convenient, and the damage is not easy to damage; the structure is convenient, simple and quick to operate, and has strong universality through standardized design.
Description
Technical Field
The invention belongs to the field of mechanical valves, and particularly relates to a safety valve performance testing tool and a safety valve performance testing method.
Background
The performance test (tuning and sealing) of the prior art safety valve is typically performed after the complete machine assembly is completed. When a new product is developed, the structure and 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 the whole machine is used for testing, so that the influence of parts such as a spring, a valve cover, a spring seat and an adjusting screw on a test result is required to be considered, and the influence factors easily cause misjudgment of the test result, as shown in fig. 1.
The existing method has the following problems: too many parts are involved in the test, and the superposition of machining errors of the parts can have great influence on the result; when the spring pressure is regulated, the friction force between parts can cause the relative movement of sealing surfaces, so that the sealing surfaces are damaged (particularly under the condition of high setting pressure); the center of gravity of the whole structure is higher, the gap between upper parts is relatively larger, and the test result is unstable due to vibration during test, so that the reliability of the test result of the traditional safety valve performance test and the tool is not high.
Disclosure of Invention
The invention aims to provide a safety valve performance testing tool, which is used for simplifying the testing tool for testing the safety valve performance, simplifying the testing operation and improving the reliability of the testing result.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a safety valve performance test fixture, comprising:
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 is provided with a first opening, the other end of the cylinder body is provided with a valve body connecting end and is provided with a second opening, and the first opening and the second opening are communicated with the inner cavity;
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, the first groove is used for positioning a guide sleeve of the safety valve, and stability of the device during testing is improved.
It is further preferred that in use a seal is provided at the junction of the cylinder and the guide sleeve of the safety valve.
Preferably, the valve body connecting end of the cylinder body is provided with a connecting part connected with a valve body of the safety valve.
Further preferably, the cylinder further comprises a fastening assembly for connecting the cylinder and the valve body of the safety valve, comprising a nut and a stud.
Preferably, a seal is provided between the outer peripheral surface of the piston and the inner peripheral surface of the inner chamber.
Further preferably, the seal 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.
Another object of the present invention is to provide a safety valve performance test method,
In order to achieve the above purpose, the invention adopts the following technical scheme:
A safety valve performance testing method, comprising:
The cross-sectional area of the piston is set to S1, the setting pressure to P1, the sealing pressure to P2, and the supply pressure to P3.
Step 1, fixedly connecting the cylinder body with a valve body of a safety valve, sealing the cylinder body and the valve body, inputting supply pressure into the inner cavity from the pressure supply end, and confirming that the tightness is qualified;
Step 2, setting downward thrust F1 equal to the supply pressure P3 multiplied by the area S1 of the cross section of the piston, wherein the thrust F1 is transmitted to a valve clack of the safety valve through the test rod, so that the valve clack of the safety valve is sealed with a valve seat of the safety valve;
Step 3, applying test pressure to the inlet of the safety valve, and performing a valve seat sealing test of the safety valve according to a standard when the test pressure of the inlet of the safety valve reaches the sealing pressure P2; when the inlet pressure reaches the setting pressure P1, a setting pressure test is performed according to a standard.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
The invention has the advantages of simplified structure, reduced influence of upper part machining errors on experimental results, high experimental result reliability, and contribution to product development and structure optimization; the structure is simple, the processing and calculation are convenient, the installation and the disassembly are convenient, and the damage is not easy to damage; the structure is convenient, simple and quick to operate, and has strong universality through standardized design.
Drawings
FIG. 1 is a schematic diagram of a safety valve;
FIG. 2 is a schematic structural diagram of a safety valve performance test tool in the present embodiment;
FIG. 3 is a schematic structural diagram of the safety valve performance testing tool in the present embodiment during testing;
In the above figures:
1. Adjusting a screw; 2. a spring seat; 3. a valve stem; 4. a spring; 5. a nut and a stud; 6. a valve cover; 7. a guide sleeve; 8. a cushion block; 9. a recoil disc; 10. a valve flap; 11. a valve body; 12. a valve seat; 13. a cylinder; 14. a piston; 15. a pressure input; 16. the 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; 23. a connection part; 24. a fastening assembly; 25. a seal; 26. test bar.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured 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 should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
As shown in fig. 2, a safety valve performance test fixture includes:
the cylinder 13, the inside of the cylinder 13 has hollow inner chamber 17, one end of the cylinder 13 has pressure input end 15, is used for inputting the external pressure, and offer the first opening 18, another end of the cylinder 13 has valve body link 16, connect with valve body 11 and guide sleeve 7 of the relief valve, and offer the second opening 19, the first opening 18 and second opening 19 communicate with inner chamber 17;
the piston 14, the piston 14 is located in the inner chamber 17, 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 guide sleeve 7 from being deviated under high pressure to cause damage to devices and deviation of test results, and in a use state, a sealing piece 22 is arranged at the connecting part between the cylinder 13 and the guide sleeve 7 of the safety valve.
As shown in fig. 3, the valve body connecting end 16 of the cylinder body 13 has a connecting portion 23 connected to the valve body 11 of the relief valve, and the cylinder body 13 further includes a fastening assembly 24 including a nut and a stud for connecting the cylinder body 13 and the valve body 11 of the relief valve on the connecting portion 23, ensuring the stability of the entire apparatus when the performance test of the relief 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 inner chamber 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 seal member 25 is provided between the second groove 21 and the inner peripheral surface of the inner chamber 17.
As shown in fig. 3, the tool further includes a pressure supply device for providing an external pressure, typically an air source, and the air has compressibility, and the tool can perform a setting pressure and a sealing test by adopting a corresponding pneumatic cylinder structure, so as to meet the requirement of a basic performance test of the safety valve, and 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 adopting a spherical surface.
The following specifically describes a method for testing the performance of the safety valve, which uses the tooling shown in fig. 2 and 3 to perform the test, and includes:
setting the area of the cross section of the piston 14 to S1, setting the pressure to P1, sealing the pressure to P2, and supplying the pressure to P3;
Step 1, connecting a cylinder 13 with a valve body 11 of a safety valve, fixing the cylinder 13 and the valve body 11 by using a fastening assembly 24, sealing the cylinder 13 and the valve body 11 by using a sealing piece 22, connecting a pressure supply device with the cylinder 13 at a pressure input end 15 through a first opening 18, checking the tightness of a test tool, and confirming that the tightness is qualified if no air bubble is emitted from a sealing connection surface;
Step 2, setting the downward thrust F1 (equivalent to the spring force of the existing safety valve) to be equal to the supply pressure P3 (which can be read by a pressure gauge) multiplied by the area S1 of the cross section of the piston 14, and transmitting the thrust F1 to the valve clack 10 of the safety valve through a test rod so as to seal between the valve clack 10 of the safety valve and the valve seat 12 of the safety valve;
Step 3, applying test pressure to the inlet of the safety valve, and performing a valve seat 12 sealing test of the safety valve according to the standard when the test pressure of the inlet of the safety valve reaches the sealing pressure P2; when the inlet pressure reaches the setting pressure P1, a setting pressure test is performed according to the standard.
The embodiment has the advantages that the structure is simplified, the influence of machining errors of upper parts (a spring, a valve cover, a spring seat, an adjusting screw rod and the like) in the existing tool on experimental results is reduced, the reliability of the experimental results is high, and the product development and the structure optimization design are facilitated; the embodiment has the advantages of simple structure, convenient processing and calculation, convenient installation and disassembly, convenient operation, simplicity and rapidness, no need of multiple adjustment (such as a spring structure, and multiple adjustment to reach the test pressure), and stronger universality through standardized design.
The above embodiments are provided to illustrate the technical concept and features of the present invention and are intended to enable those skilled in the art to understand the content of the present invention and implement the same, and are not intended to limit the scope of the present invention. All equivalent changes or modifications made in accordance with the spirit of the present invention should be construed to be included in the scope of the present invention.
Claims (9)
1. Safety valve performance test fixture, its 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 is provided with a first opening, the other end of the cylinder body is provided with a valve body connecting end and is provided with a second opening, and the first opening and the second opening are communicated with the inner cavity;
The piston is positioned in the inner cavity and can slide up and down relative to the cylinder body;
The test rod, the both ends of test rod adopt the sphere to cooperate with the cushion of relief valve and the piston, the cushion set up on the recoil dish that is connected with the valve clack of relief valve.
2. The safety valve performance testing tool according to claim 1, wherein the connecting end of the valve body of the cylinder body is provided with a first groove, and the first groove is used for positioning a guide sleeve of the safety valve.
3. The safety valve performance test fixture according to claim 2, wherein in a use state, a sealing member is arranged at a joint of the cylinder body and the guide sleeve of the safety valve.
4. The safety valve performance test tool according to claim 1, wherein the valve body connecting end of the cylinder body is provided with a connecting part connected with a valve body of the safety valve.
5. The safety valve performance test fixture 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 test fixture according to claim 1, wherein a seal is provided between an outer peripheral surface of the piston and an inner peripheral surface of the inner chamber.
7. The safety valve performance test fixture according to claim 6, wherein 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.
8. The safety valve performance test fixture of claim 1, further comprising a pressure supply device.
9. A safety valve performance test method, characterized in that the safety valve performance test tool according to any one of claims 1 to 8 is used for testing, comprising:
setting the area of the cross section of the piston as S1, setting the pressure as P1, the sealing pressure as P2 and the supply pressure as P3;
step 1, fixedly connecting the cylinder body with a valve body of a safety valve, sealing the cylinder body and the valve body, inputting supply pressure into the inner cavity from the pressure supply end, and confirming that the tightness is qualified;
Step 2, setting downward thrust F1 equal to the supply pressure P3 multiplied by the area S1 of the cross section of the piston, wherein the thrust F1 is transmitted to a valve clack of the safety valve through the test rod, so that the valve clack of the safety valve is sealed with a valve seat of the safety valve;
Step 3, applying test pressure to the inlet of the safety valve, and performing a valve seat sealing test of the safety valve according to a standard when the test pressure of the inlet of the safety valve reaches the sealing pressure P2; when the inlet pressure reaches the setting pressure P1, a setting pressure test is performed according to a standard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010577579.3A CN111610016B (en) | 2020-06-23 | 2020-06-23 | Safety valve performance testing tool and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010577579.3A CN111610016B (en) | 2020-06-23 | 2020-06-23 | Safety valve performance testing tool and method |
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| CN111610016A CN111610016A (en) | 2020-09-01 |
| CN111610016B true CN111610016B (en) | 2024-07-12 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112432784B (en) * | 2020-10-22 | 2022-02-15 | 西南大学 | Automatic fault detection device for valve |
| CN113820074B (en) * | 2021-11-22 | 2022-02-18 | 日照朝力信息科技有限公司 | Split testing equipment and testing method for sealing performance of overflow valve |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212030908U (en) * | 2020-06-23 | 2020-11-27 | 吴江市东吴机械有限责任公司 | Safety valve performance test tool |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4520655A (en) * | 1981-12-18 | 1985-06-04 | Gordon E. Eldridge | Valve testing apparatus |
| CN1183345C (en) * | 2002-11-20 | 2005-01-05 | 大连理工大学 | Safety valve having on line detection function |
| KR100824213B1 (en) * | 2007-02-09 | 2008-04-22 | 에스씨에스 주식회사 | Safety Valve Test Bench |
| CN101368883B (en) * | 2008-09-16 | 2010-06-16 | 江南大学 | On-line check method for safety valve |
| CN103047457B (en) * | 2012-12-19 | 2015-05-06 | 武汉大禹阀门股份有限公司 | Water hammer discharge valve |
| CN106051240B (en) * | 2016-06-30 | 2018-02-13 | 江苏省特种设备安全监督检验研究院南通分院 | Safety valve, the on-line measuring device of safety valve and online test method |
| KR101881471B1 (en) * | 2017-04-06 | 2018-07-24 | 주식회사 대흥이엔텍 | Test Apparatus for Safety Valve |
| CN111076924B (en) * | 2019-12-31 | 2024-05-17 | 深圳市质量安全检验检测研究院 | Safety valve testing device and testing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN212030908U (en) * | 2020-06-23 | 2020-11-27 | 吴江市东吴机械有限责任公司 | Safety valve performance test tool |
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