CN203785876U - Stop valve testing stand for low-temperature heat-insulation gas cylinder - Google Patents
Stop valve testing stand for low-temperature heat-insulation gas cylinder Download PDFInfo
- Publication number
- CN203785876U CN203785876U CN201420109672.1U CN201420109672U CN203785876U CN 203785876 U CN203785876 U CN 203785876U CN 201420109672 U CN201420109672 U CN 201420109672U CN 203785876 U CN203785876 U CN 203785876U
- Authority
- CN
- China
- Prior art keywords
- liquid nitrogen
- stop valve
- valve
- control box
- temperature control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The utility model relates to a stop valve testing stand for a low-temperature heat-insulation gas cylinder. The testing stand comprises a liquid nitrogen tank, a temperature control box, a helium bottle and a Dewar flask, wherein the helium bottle is connected with a tested station in the liquid nitrogen tank successively through a filter, a pressure-reducing valve, a solenoid valve, a first stop valve and a first pressure sensor, the Dewar flask is connected with the liquid nitrogen tank via a second stop valve and with a tested station in the temperature control box via a first solenoid valve and a second pressure sensor, and the tested station in the temperature control box is connected with the second pressure sensor via a second solenoid valve. The testing stand realizes low-temperature start and stop test, low-temperature airtightness test and low-temperature durability test for the stop valve via the liquid nitrogen tank, the temperature control box, the helium bottle and the Dewar flask, and the realization manner is flexible and variable.
Description
Technical field
The utility model relates to stop valve technical field of measurement and test, particularly relates to a kind of cryogenic insulated cylinder stop valve testing table.
Background technology
Stop valve, is also pipe valve, is one of most popular a kind of valve, and why very popular it is, be due in switching process between sealing surface friction force little, more durable, Lift is little, easy to manufacture, easy to maintenance, be not only applicable to mesolow, and be applicable to high pressure.The closed principle of stop valve is that dependence valve thick stick pressure, fits tightly valve clack sealing surface and sealing surface of seat, stops medium circulation.Stop valve is only permitted medium uniflux, has directivity when installation.The structure length of stop valve is greater than gate valve, and fluid resistance is large simultaneously, and when long-time running, sealing reliability is not strong.Therefore need a kind of testing table that can detect stop valve performance badly.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of cryogenic insulated cylinder stop valve testing table, can detect the performance of stop valve.
The utility model solves the technical scheme that its technical matters adopts: a kind of cryogenic insulated cylinder stop valve testing table is provided, comprise liquid nitrogen case, temperature control box, helium tank and Dewar flask, described helium tank is connected with the tested station in described liquid nitrogen case by filtrator, reduction valve, solenoid valve, the first stop valve, the first pressure transducer successively; Described Dewar flask is connected with liquid nitrogen case by the second stop valve; Described Dewar flask is also connected with the tested station in temperature control box with the second pressure transducer by the first solenoid valve, and the tested station in described temperature control box is also connected with described the second pressure transducer by the second solenoid valve.
On tested station in tested station and temperature control box in described liquid nitrogen case, torque spanner is all installed, described torque spanner is connected with torque sensor by Hooks coupling universal coupling, described torque sensor is connected with speed reduction unit by shaft coupling, and described speed reduction unit is connected with servomotor.
In described liquid nitrogen case, be also provided with temperature sensor.
Between measured workpiece in described the first pressure transducer and described liquid nitrogen case, be also provided with verification gas cylinder, described verification gas cylinder is connected on the pipeline between the measured workpiece in described the first pressure transducer and described liquid nitrogen case by verification stop valve.
The air intake opening of described Dewar flask is connected with gas supplementing opening with reduction valve by gas admittance valve successively.
Beneficial effect
Owing to having adopted above-mentioned technical scheme, the utility model compared with prior art, there is following advantage and good effect: the utility model has been realized the test of low temperature keying property, low temperature airtightness test and the low-temperature durability test of stop valve by liquid nitrogen case, temperature control box, helium tank and high pressure liquid helium bottle, can complete three kinds of different tests by a testing table, implementation is flexible and changeable.
Brief description of the drawings
Fig. 1 is systematic schematic diagram of the present utility model.
Embodiment
Below in conjunction with specific embodiment, further set forth the utility model.Should be understood that these embodiment are only not used in restriction scope of the present utility model for the utility model is described.In addition should be understood that those skilled in the art can make various changes or modifications the utility model after having read the content of the utility model instruction, these equivalent form of values fall within the application's appended claims limited range equally.
Embodiment of the present utility model relates to a kind of cryogenic insulated cylinder stop valve testing table, as shown in Figure 1, comprise liquid nitrogen case 1, temperature control box 2, helium tank 3 and Dewar flask 4, described helium tank 3 is connected with the tested station in described liquid nitrogen case 1 by filtrator 5, reduction valve 6, solenoid valve 7, the first stop valve 8, the first pressure transducer 9 successively; Described Dewar flask 4 is connected with liquid nitrogen case 1 by the second stop valve 10; Described Dewar flask 4 is also connected with the tested station in temperature control box 2 with the second pressure transducer 12 by the first solenoid valve 11, and the tested station in described temperature control box 2 is also connected with described the second pressure transducer 12 by the second solenoid valve 13.
On tested station in tested station and temperature control box 2 in described liquid nitrogen case 1, torque spanner is all installed, described torque spanner is connected with torque sensor 21 by Hooks coupling universal coupling 20, described torque sensor 21 is connected with speed reduction unit 23 by shaft coupling 22, and described speed reduction unit 23 is connected with servomotor 24.Described servomotor can be controlled by PLC, and it is proven technique in this area that PLC controls, and this case does not improve control method, therefore repeats no more.
In described liquid nitrogen case 1, be also provided with temperature sensor 14, this temperature sensor 14 can adopt thermopair, is used for gathering the temperature conditions in liquid nitrogen case.
Between measured workpiece in described the first pressure transducer 9 and described liquid nitrogen case 1, be also provided with verification gas cylinder 15, described verification gas cylinder 15 is connected on the pipeline between the measured workpiece in described the first pressure transducer 9 and described liquid nitrogen case 1 by verification stop valve 16.
The air intake opening of described Dewar flask 4 is connected with gas supplementing opening 19 with reduction valve 18 by gas admittance valve 17 successively, can be in real time for Dewar flask carries out tonifying Qi by gas supplementing opening 19.
The utility model can carry out the test of low temperature keying property.Open and close when test property carrying out low temperature, first liquid nitrogen outlet and helium high-pressure outlet and test piece and liquid nitrogen case are connected to the position of temperature sensor on regulator solution nitrogenous hood; Open the liquid in-out valve on Dewar flask, open liquid nitrogen and export liquid nitrogen case to, the liquid nitrogen in Dewar flask starts liquid nitrogen case to inject liquid nitrogen, when the temperature on the temperature sensor of observing on liquid nitrogen case reaches-196 while spending, closes tested stop valve.Rotate the torque spanner of tested station by servomotor, and observe the moment values on torque spanner, total travel opens and closes 5 times, and pressurize 1Min, records moment values three times, thereby completes the test of low temperature keying property.
After low temperature actuation test is carried out, can carry out low temperature airtightness test.In the time carrying out low temperature airtightness test, by helium tank, helium is inflated and pressurization the cryogenic globe valve immersing in liquid nitrogen case, when being forced into after set pressure, solenoid valve quits work, Helium leak detector is stretched into the slip of surveying helium in liquid nitrogen case simultaneously, thereby complete low temperature airtightness test.
The utility model also can carry out low-temperature durability test.In the time carrying out low-temperature durability test, in the time that the temperature in temperature control box reaches the temperature of setting, low temperature liquid nitrogen in Dewar flask passes through the first solenoid valve to stop valve topping up and pressurization in temperature control box, when pressure transducer detects after set pressure, system starts driven by servomotor reductor and drives the manual operation section of stop valve to start working, torque sensor imports the moment of torsion of detection into PLC, after the manual operation section of cryogenic globe valve is rotated in place, the manual operation section of PLC signalling reversion cryogenic globe valve, torque sensor imports the moment of torsion of detection into PLC, when durable number of times reaches after set point number, system auto stop, complete low-temperature durability test.
Claims (5)
1. a cryogenic insulated cylinder stop valve testing table, comprise liquid nitrogen case (1), temperature control box (2), helium tank (3) and Dewar flask (4), it is characterized in that, described helium tank (3) is connected with the tested station in described liquid nitrogen case (1) by filtrator (5), reduction valve (6), solenoid valve (7), the first stop valve (8), the first pressure transducer (9) successively; Described Dewar flask (3) is connected with liquid nitrogen case (1) by the second stop valve (10); Described Dewar flask (3) is also connected with the tested station in temperature control box (2) with the second pressure transducer (12) by the first solenoid valve (11), and the tested station in described temperature control box (2) is also connected with described the second pressure transducer (12) by the second solenoid valve (13).
2. cryogenic insulated cylinder according to claim 1 stop valve testing table, it is characterized in that, on tested station in tested station and temperature control box (2) in described liquid nitrogen case (1), torque spanner is all installed, described torque spanner is connected with torque sensor (21) by Hooks coupling universal coupling (20), described torque sensor (21) is connected with speed reduction unit (23) by shaft coupling (22), and described speed reduction unit (23) is connected with servomotor (24).
3. cryogenic insulated cylinder according to claim 1 stop valve testing table, is characterized in that, is also provided with temperature sensor (14) in described liquid nitrogen case (1).
4. cryogenic insulated cylinder according to claim 1 stop valve testing table, it is characterized in that, between measured workpiece in described the first pressure transducer (9) and described liquid nitrogen case (1), be also provided with verification gas cylinder (15), described verification gas cylinder (15) is connected on the pipeline between the measured workpiece in described the first pressure transducer (9) and described liquid nitrogen case (1) by verification stop valve (16).
5. cryogenic insulated cylinder according to claim 1 stop valve testing table, is characterized in that, the air intake opening of described Dewar flask (4) is connected with gas supplementing opening (19) with reduction valve (18) by gas admittance valve (17) successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420109672.1U CN203785876U (en) | 2014-03-11 | 2014-03-11 | Stop valve testing stand for low-temperature heat-insulation gas cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420109672.1U CN203785876U (en) | 2014-03-11 | 2014-03-11 | Stop valve testing stand for low-temperature heat-insulation gas cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203785876U true CN203785876U (en) | 2014-08-20 |
Family
ID=51322053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420109672.1U Expired - Fee Related CN203785876U (en) | 2014-03-11 | 2014-03-11 | Stop valve testing stand for low-temperature heat-insulation gas cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203785876U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106556511A (en) * | 2016-11-24 | 2017-04-05 | 安徽皖拓自动化有限公司 | Valve low-temperature deep assay device cryogenic system based on liquid nitrogen refrigerant |
| CN107525660A (en) * | 2017-08-07 | 2017-12-29 | 裴渐强 | A kind of low-temperature safety valve calibration equipment |
| CN109612700A (en) * | 2018-12-11 | 2019-04-12 | 东南大学 | Components Performance Test System under deep cooling hyperbaric environment |
| CN111982552A (en) * | 2020-07-29 | 2020-11-24 | 凯迈（洛阳）气源有限公司 | Rapid cooling and heating system and method for Dewar chip fatigue test |
-
2014
- 2014-03-11 CN CN201420109672.1U patent/CN203785876U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106556511A (en) * | 2016-11-24 | 2017-04-05 | 安徽皖拓自动化有限公司 | Valve low-temperature deep assay device cryogenic system based on liquid nitrogen refrigerant |
| CN107525660A (en) * | 2017-08-07 | 2017-12-29 | 裴渐强 | A kind of low-temperature safety valve calibration equipment |
| CN109612700A (en) * | 2018-12-11 | 2019-04-12 | 东南大学 | Components Performance Test System under deep cooling hyperbaric environment |
| CN111982552A (en) * | 2020-07-29 | 2020-11-24 | 凯迈（洛阳）气源有限公司 | Rapid cooling and heating system and method for Dewar chip fatigue test |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203785876U (en) | Stop valve testing stand for low-temperature heat-insulation gas cylinder | |
| CN102297829B (en) | Method and device for measuring gas adsorption quantity and adsorption deformation of coal rock under stress condition | |
| CN105716347A (en) | Liquid nitrogen low-temperature box | |
| CN108196505B (en) | Normal-temperature gaseous working medium quantitative filling system and filling method thereof | |
| CN202533247U (en) | Apparatus for testing durability of cylinder valve | |
| CN205655969U (en) | Device that leaks in simulation gas valve | |
| CN111504701A (en) | Ultrahigh pressure simulation experiment system of fidelity coring device | |
| CN104614164A (en) | High-pressure circulating fatigue testing system for electromagnetic valve | |
| CN203732294U (en) | Ground automation test system of aircraft pressurization system | |
| CN204679232U (en) | A kind of pipe fitting proving installation | |
| CN104697887A (en) | Dynamic desorption-flowing isothermal and constant-pressure experimental facility for gas in coal shale | |
| CN202204808U (en) | Solid coupling parameter tester for coal gas containing mashgas | |
| CN207540742U (en) | A kind of high-pressure ball valve test device for air tightness | |
| CN108760464B (en) | Method and device for realizing positive and negative pressure alternating control of fuel tank | |
| CN210464918U (en) | Detection apparatus for simulation deep sea environment rotary motion sealing washer sealing performance | |
| CN201909706U (en) | Leakproof tightness detector | |
| CN103674718B (en) | Based on cell pressure method of testing and the test macro of explosion-proof mathematical model | |
| CN111720109B (en) | Dry gas well production simulation device and method based on fixed-yield production | |
| CN205656103U (en) | A test device that is used for pressure -bearing container seals circle performance to verify | |
| CN109708712B (en) | Device and method for measuring mass flow of fixed flow guide element based on dynamic differential pressure attenuation | |
| CN111458425A (en) | VOC gas component analysis experimental device in oil tank of oil tanker and use method thereof | |
| CN204788846U (en) | Oily formula distribution transformer atmospheric pressure oil leak test device | |
| CN204988662U (en) | Butterfly valve gas tightness can measuring equipment | |
| CN103033350A (en) | Accelerated failure experimental method for gas pressure regulator and experimental device thereof | |
| CN203417276U (en) | Detector for cardiac valves |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140820 Termination date: 20150311 |
|
| EXPY | Termination of patent right or utility model |