CN104568397B - A kind of multi-functional automatic performance test device of Subzero valve - Google Patents
A kind of multi-functional automatic performance test device of Subzero valve Download PDFInfo
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- CN104568397B CN104568397B CN201310522050.1A CN201310522050A CN104568397B CN 104568397 B CN104568397 B CN 104568397B CN 201310522050 A CN201310522050 A CN 201310522050A CN 104568397 B CN104568397 B CN 104568397B
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Abstract
It is main by frame the present invention relates to a kind of multi-functional automatic low-temp equipment for testing valve performance, upper cover locking cylinder, locked position mobile cylinder, upper lid, Computer Control Unit, outlet pipe, motor encoder, lifting deceleration machine, upper lid lifting compression cylinder, torque sensor, air inlet pipeline, rinse and cold liquid suction line, exhaust pipe, vavuum pump, low temperature flow container, detect nitrogen pot, pressure sensor, adpting flange, test valve, adjustable valve mounting seat, cryogenic box, technique stopple is constituted.Compared with prior art, the present invention has the advantages that automaticity height, a tractor serves several purposes.
Description
Technical field
The present invention relates to valve test and performance detection, tested more particularly, to a kind of multi-functional automatic performance of Subzero valve
Device, can carry out Subzero valve performance test and quality inspection.
Background technology
The quality of valve mass directly influences sealing and the leaking performance of finished product packing, so its quality makes as valve
With the emphasis paid close attention to manufacturing enterprise, valve type experiment is mainly to valve under low temperature (- 198 DEG C~50 DEG C) state
The test and evaluation of free switch number of times, valve leak and switch parameter.The main temperature with valve body, bonnet of its test system,
Based on leakage and valve inlet and outlet pressure, on-off times, switching torque and leak detection.Pass through the automatic data collection to these parameters
Then data processing is carried out by computer, finally makes the report of valve type conclusion (of pressure testing).
Subzero valve measuring technology is one of Subzero valve manufacture key technology.On domestic valve manufacture industry size
International prostatitis is in, is valve manufacture big country.But there is larger gap with developed country in valve production technology, particularly special type
Also there is larger gap in valve, high/low temperature valve, fine adjustment valve, production, measuring technology, some special trades, steel,
Chemical industry, the Special valve overwhelming majority of oil and gas industry application are still imported valve, and Subzero valve of the present invention is multi-functional
Automatic performance test device cannot only be applied to Subzero valve, can also be generalized to other similar application scenarios, with pushing away
Wide meaning.
The content of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of many work(of Subzero valve
Can automatic performance test device.
The purpose of the present invention can be achieved through the following technical solutions：A kind of multi-functional automatic performance test of Subzero valve
Device, it is characterised in that including
Cryogenic box valve system：Including pressure sensor 17, adpting flange 18, valve to be tested 19, adjustable valve peace
Seat 20, cryogenic box 21 are filled, described valve to be tested 19 is arranged in cryogenic box 21 by adjustable valve mounting seat 20, and
The both sides of valve 19 to be tested are provided with the adpting flange 18 of connection air inlet pipeline and outlet pipe, and detect the pressure of gas pressure
Force snesor 17；
Upper lid operating system：Including frame 1, upper cover locking cylinder 2, locked position mobile cylinder 3, upper lid 4, upper lid lifting
Compression cylinder 9, described cryogenic box 21 is arranged in frame 1, and described upper lid 4 is covers on cryogenic box 21, described frame 1
Cover locking cylinder 2 and locked position mobile cylinder 3 are installed with the side of cryogenic box 21, is pacified between described upper lid 4 and frame 1
Load onto lid lifting compression cylinder 9；Lid 4 is realized rise and closed under the control of the computer in realization, and with closing cover locking gas
Cylinder 2 realizes that the sealing covered is compressed.
Valve rod operating mechanism：Including motor encoder 7, lifting deceleration machine 8, torque sensor 10, described lift
Reductor 8 connects the valve rod of valve 19 to be tested, and install on the motor of lifting deceleration machine 8 motor encoder 7,
Torque sensor 10 is installed on output shaft；The length that output shaft can be determined according to the model of valve in operation adapts to valve
The requirement of gate number, can be tracked adjustment according to the length change in valve rod rotary course, can automatically turn on valve
Door；Test the unlatching moment of valve, carry out valve opening life test.
Test nitrogen system：Including detection nitrogen pot 16, air inlet pipeline 11, outlet pipe 6, described detection nitrogen pot 16
One end of valve 19 to be tested is connected by air inlet pipeline 11, described outlet pipe 6 connects the other end of valve 19 to be tested；
Low temperature cold liquid system canister：Including flushing and cold liquid suction line 12, exhaust pipe 13, vavuum pump 14, low temperature flow container
15th, technique stopple 22, described flushing and cold liquid suction line 12 and exhaust pipe 13 are connected on low temperature flow container 15, institute
The connection exhaust pipe 13 of vavuum pump 14 stated, described technique stopple 22 is arranged on lid 4；
Computer Control Unit 5：Respectively connection source nitrogen, low temperature flow container 15, upper lid operating system, valve rod operating mechanism and
Nitrogen system is tested, and exports testing result.
Described adjustable valve mounting seat 20 includes 2 V-blocks with valve standing finish, is fixed with the bottom of guide rail
Plate, bottom plate is bolted on the bottom surface of cryogenic box 21, and 2 V-blocks fix valve 19 to be tested, and are slided on guide rail.
The size and shape of 2 described V-blocks matches with valve 19 to be tested.2 V-blocks can be according to valve
Profile is slided on guide rail, adapts to the requirement of different valve sizes, when valve to be tested exceed V-block can installation dimension when can
Change the installation that other V-blocks adapt to different size series valve, it is ensured that valve position in test process is fixed, full
Sufficient valve opening and torque test requirement.
Described upper lid 4, which is provided with two technique consents, each technique consent, is respectively provided with one for sealed technique
Stopple 22, before detection, two technique consents are opened, and insert flexible pipe connection Nitrogen source gases in wherein one hole, by cryogenic box
In air displace, then with two seal and openings of technique stopple 22.
Described low temperature flow container 15 is by switching the technique consent that switch is connected on upper lid 4, in discharge cryogenic box 21
Gas after, by switch switch switching the cryogenic liquid in low temperature flow container 15 is pressed into cryogenic box by same pipeline
Technique stopple 22 is blocked, after detection terminates, passes through vavuum pump 14 and pipeline being recovered to the cryogenic liquid in cryogenic box of sobbing
Low temperature flow container 15.Enter pipeline in the increase nitrogen of low temperature flow container 15, realization nitrogen is in cryogenic box 21, low temperature flow container 15, pipe
Air in road enters line replacement, and carries out the recovery of cryogenic liquid using vavuum pump 14, is carried out using the pressure of external nitrogen low
The conveying of geothermal liquid.
Pressure sensor 17, test bolt lock in the environment of low temperature are installed on the fixing bolt of described adpting flange 18
The situation of change of clamp force, type selecting and locking for installation bolt provide design considerations.
Wherein frame 1 is that the whole parts of basic part of device are fitted into frame.Upper cover locking cylinder 2 is according to low temperature
The size and seal request of case are set, for locking upper lid.Locked position mobile cylinder 3 is that cover lock is adjusted when being covered on switch
The position of tight cylinder 2.Upper lid 4 is to prevent cryogenic liquid from issuing additional.Computer Control Unit 5 is that the maincenter of device is used for receiving, locating
Manage data；Control system, output examining report.Leakage gas outlet pipe in the valve of outlet pipe 6.Motor encoder 7, which is arranged on, to be risen
On the drive motor axle of drop formula reductor 8, by motor speed, measurement is arranged on the shifting that lifting deceleration machine 8 exports screw mandrel
Dynamic length.Upper lid lifting compression cylinder 9 is used for being lifted, being compressed；Upper lid 4.It is defeated that torque sensor 10 is arranged on lifting deceleration machine 8
Valve rod operation moment of torsion is measured on shaft.Air inlet pipeline 11 is to detect the connecting line between nitrogen pot 16 and Subzero valve, conveying
Test nitrogen.Rinse and cold liquid suction line 12 connects external source nitrogen and cryogenic box 21, the supplying nitrogen of low temperature flow container 15 and low
Geothermal liquid.The connection of exhaust pipe 13 vavuum pump 14, low temperature flow container 15 reclaim cryogenic liquid, the storage cryogenic liquid of low temperature flow container 15.
Detect the storage detection nitrogen of nitrogen pot 16.Pressure sensor 17 is arranged on the connection of valve 19 to be tested and adpting flange 18
Monitoring test bolt coupling mechanism force on bolt.Adjustable valve mounting seat 20 install test Subzero valve, by 2 V-blocks, bottom plate,
Guide rail is constituted, and V-block can move on guide rail and change model, adapts to different valve test needs.Cryogenic box 21, which is installed, to be surveyed
Try the place of Subzero valve and cryogenic media.Technique stopple 22 is used to block to cover 2 technique perforates, and one is to insert Low Temperature Liquid
Body and nitrogen pipeline, hole is air row's mouth in addition.
Operation principle is：
Adjustable valve mounting seat V-block and fixation, the cover lock on upper lid operating mechanism are adjusted according to Subzero valve model
Tight cylinder 2, locked position mobile cylinder 3, upper lid lifting compression cylinder 9 cover tightly upper lid and cryogenic box, low temperature cold liquid system canister
Source nitrogen passes through flushing and cold liquid suction line 12；Exhaust pipe 13；Nitrogen is inputted after the air in cryogenic box displacement case, led to
Cross to switch to switch the cryogenic liquid in low temperature flow container 15 being pressed into cryogenic box by same pipeline and block technique stopple 22,
Test nitrogen system and pass through (detection nitrogen pot 16；Air inlet pipeline 11；Outlet pipe 6；Test is passed through tested low temperature with nitrogen
Valve, according to test request operating valve lever operating mechanism (motor encoder 7；Lifting deceleration machine 8；Torque sensor 10) carry out
Testing valve performance, whole test process exports test report after the completion of having computer control system control, test.
Compared with prior art, a kind of multistage even pressure type Subzero valve sealing device of the present invention is employed nitrogen as interior test
Using ethanol, liquid nitrogen mixing liquid as low temperature environment medium in gas, cryogenic box, adjustable valve mounting seat can in cryogenic box
A variety of serial Subzero valves can be fixed to be exchanged by local directed complete set and accessory, the air displacement of low temperature case lid, cryogenic liquid
Turnover, open and sealing, the unlatching of valve, controlled to be automatically brought into operation by computer using mechanical device, test signal is adopted
Collection, processing, control, output are handled by computer, allow device carry out it is many in serial Subzero valves low temperature (-
196 DEG C) external seal, operational torque, Bolt Tightening Force, valve material performance in low temperature are carried out under environment change at low ambient temperatures
Parameter, the operation lifetime of valve seal (including valve rod and valve interior sealing) carry out performance dynamic state of parameters detection, in test job
It is middle realize the automating of test operation, it is intelligent.Advanced solution is provided for Subzero valve test.
Present invention has the advantages that：
(1) automatically opening up and closing for low temperature case lid, is realized.
(2) being automatically brought into operation while measuring moment of torsion for valve rod, is realized.
(3) monitoring and measurement of low temperature environment lower flange clamping screw coupling mechanism force, are realized.
(4) a tractor serves several purposes, is realized, multiple indexs are measured.
Brief description of the drawings
Fig. 1 is schematic structural view of the invention；
Fig. 2 is fundamental diagram of the invention.
Identified in figure：1. frame；2. on cover locking cylinder；3. locked position mobile cylinder；4. on cover；5. computer is controlled
Device；6. outlet pipe；7. motor encoder；8. lifting deceleration machine；9. on lid lifting compression cylinder；10. torque sensor；
11. air inlet pipeline；12. rinse and cold liquid suction line；13. exhaust pipe；14. vavuum pump；15. low temperature flow container；16. detection
Nitrogen pot；17. pressure sensor；18. adpting flange；19. test valve；20. adjustable valve mounting seat；21. cryogenic box；
22. technique stopple.
Embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment
As shown in Fig. 1~2, a kind of multi-functional automatic performance test device of Subzero valve, including
Cryogenic box valve system：Including pressure sensor 17, adpting flange 18, valve to be tested 19, adjustable valve peace
Seat 20, cryogenic box 21 are filled, described valve to be tested 19 is arranged in cryogenic box 21 by adjustable valve mounting seat 20, and
The both sides of valve 19 to be tested are provided with the adpting flange 18 of connection air inlet pipeline and outlet pipe, and detect the pressure of gas pressure
Force snesor 17；
Upper lid operating system：Including frame 1, upper cover locking cylinder 2, locked position mobile cylinder 3, upper lid 4, upper lid lifting
Compression cylinder 9, described cryogenic box 21 is arranged in frame 1, and described upper lid 4 is covers on cryogenic box 21, described frame 1
Cover locking cylinder 2 and locked position mobile cylinder 3 are installed with the side of cryogenic box 21, is pacified between described upper lid 4 and frame 1
Load onto lid lifting compression cylinder 9；Lid 4 is realized rise and closed under the control of the computer in realization, and with closing cover locking gas
Cylinder 2 realizes that the sealing covered is compressed.
Valve rod operating mechanism：Including motor encoder 7, lifting deceleration machine 8, torque sensor 10, described lift
Reductor 8 connects the valve rod of valve 19 to be tested, and install on the motor of lifting deceleration machine 8 motor encoder 7,
Torque sensor 10 is installed on output shaft；The length that output shaft can be determined according to the model of valve in operation adapts to valve
The requirement of gate number, can be tracked adjustment according to the length change in valve rod rotary course, can automatically turn on valve
Door；Test the unlatching moment of valve, carry out valve opening life test.
Test nitrogen system：Including detection nitrogen pot 16, air inlet pipeline 11, outlet pipe 6, described detection nitrogen pot 16
One end of valve 19 to be tested is connected by air inlet pipeline 11, described outlet pipe 6 connects the other end of valve 19 to be tested；
Low temperature cold liquid system canister：Including flushing and cold liquid suction line 12, exhaust pipe 13, vavuum pump 14, low temperature flow container
15th, technique stopple 22, described flushing and cold liquid suction line 12 and exhaust pipe 13 are connected on low temperature flow container 15, institute
The connection exhaust pipe 13 of vavuum pump 14 stated, described technique stopple 22 is arranged on lid 4；
Computer Control Unit 5：Respectively connection source nitrogen, low temperature flow container 15, upper lid operating system, valve rod operating mechanism and
Nitrogen system is tested, and exports testing result.
Described adjustable valve mounting seat 20 includes 2 V-blocks with valve standing finish, is fixed with the bottom of guide rail
Plate, bottom plate is bolted on the bottom surface of cryogenic box 21, and 2 V-blocks fix valve 19 to be tested, and are slided on guide rail.
The size and shape of 2 described V-blocks matches with valve 19 to be tested.2 V-blocks can be according to valve
Profile is slided on guide rail, adapts to the requirement of different valve sizes, when valve to be tested exceed V-block can installation dimension when can
Change the installation that other V-blocks adapt to different size series valve, it is ensured that valve position in test process is fixed, full
Sufficient valve opening and torque test requirement.
Described upper lid 4, which is provided with two technique consents, each technique consent, is respectively provided with one for sealed technique
Stopple 22, before detection, two technique consents are opened, and insert flexible pipe connection Nitrogen source gases in wherein one hole, by cryogenic box
In air displace, then with two seal and openings of technique stopple 22.
Described low temperature flow container 15 is by switching the technique consent that switch is connected on upper lid 4, in discharge cryogenic box 21
Gas after, by switch switch switching the cryogenic liquid in low temperature flow container 15 is pressed into cryogenic box by same pipeline
Technique stopple 22 is blocked, after detection terminates, passes through vavuum pump 14 and pipeline being recovered to the cryogenic liquid in cryogenic box of sobbing
Low temperature flow container 15.Enter pipeline in the increase nitrogen of low temperature flow container 15, realization nitrogen is in cryogenic box 21, low temperature flow container 15, pipe
Air in road enters line replacement, and carries out the recovery of cryogenic liquid using vavuum pump 14, is carried out using the pressure of external nitrogen low
The conveying of geothermal liquid.
Pressure sensor 17, test bolt lock in the environment of low temperature are installed on the fixing bolt of described adpting flange 18
The situation of change of clamp force, type selecting and locking for installation bolt provide design considerations.
Detected by following steps：
1st, test device locked position mobile cylinder 3 is moved；Fixed block leaves lid 4, upper lid on upper cover locking cylinder 2
Lift compression cylinder 9, the lifting of lifting deceleration machine 8 and arrive extreme higher position.
2nd, according to valve mechanism from 2 V-blocks in adjustable valve mounting seat 20, test Subzero valve, connection are installed
Flange 18 and pressure sensor 10.
3rd, the upper lid lifting movement of compression cylinder 9 covers lid 4 and compressed.Locked position mobile cylinder 3 is moved；Upper cover locking
Covered in the locking of cylinder 2.
4th, technique consent is opened, stainless steel flexible hose is inserted in left hole.
5th, external source nitrogen valve is opened, air in cryogenic box is displaced.
6th, the flexible pipe seal and opening of technique stopple 22 is extracted.
7th, open cryogenic liquid and extrude valve, cryogenic liquid is transported to cryogenic box from low temperature flow container 15 using external nitrogen
21。
8th, the output end of adjustment lifting deceleration machine 8 is connected with valve rod spanner.
9th, open detection nitrogen pot 16, the valve of air inlet pipeline 11, test nitrogen enter test Subzero valve.
10th, start the test control program of Computer Control Unit 5 to start to be tested by test technology.
11st, output test result, include operation lifetime, bolt coupling mechanism force, sealing data and the moment of torsion number of valve to be tested
According to.
12nd, start cryogenic liquid reclaimer, open vavuum pump 14 and cryogenic liquid is recovered to Low Temperature Liquid from cryogenic box 21
Tank 15.
13rd, test device locked position mobile cylinder 3 is moved；Fixed block leaves lid 4, upper lid on upper cover locking cylinder 2
Lift compression cylinder 9, the lifting of lifting deceleration machine 8 and arrive extreme higher position, upper lid 4 is raised to extreme higher position.
14th, dismounting test Subzero valve, completes test.
Claims (5)
1. a kind of multi-functional automatic performance test device of Subzero valve, it is characterised in that including
Cryogenic box valve system：Including pressure sensor (17), adpting flange (18), valve to be tested (19), adjustable valve
Mounting seat (20), cryogenic box (21), described valve to be tested (19) are arranged on low temperature by adjustable valve mounting seat (20)
In case (21), and the adpting flange (18) for connecting air inlet pipeline and outlet pipe is installed in valve to be tested (19) both sides, with
And the pressure sensor (17) of detection gas pressure；
Upper lid operating system：Including frame (1), upper cover locking cylinder (2), locked position mobile cylinder (3), upper lid (4), upper lid
Compression cylinder (9) is lifted, described cryogenic box (21) is arranged in frame (1), described upper lid (4) is on cryogenic box (21)
Lid, described frame (1) and the side of cryogenic box (21) installs cover locking cylinder (2) and locked position mobile cylinder (3), institute
Lid lifting compression cylinder (9) is installed between the upper lid (4) and frame (1) stated；
Valve rod operating mechanism：Including motor encoder (7), lifting deceleration machine (8), torque sensor (10), described lifting
Formula reductor (8) connects the valve rod of valve (19) to be tested, and installation motor is compiled on the motor of lifting deceleration machine (8)
Code device (7), the installation torque sensor (10) on output shaft；
Test nitrogen system：Including detection nitrogen pot (16), air inlet pipeline (11), outlet pipe (6), described detection nitrogen pot
(16) valve (19) one end to be tested is connected by air inlet pipeline (11), described outlet pipe (6) connects valve to be tested
(19) other end；
Low temperature cold liquid system canister：Including flushing and cold liquid suction line (12), exhaust pipe (13), vavuum pump (14), Low Temperature Liquid
Tank (15), technique stopple (22), described flushing and cold liquid suction line (12) and exhaust pipe (13) are connected to low temperature
On flow container (15), described vavuum pump (14) connection exhaust pipe (13), described technique stopple (22) is arranged on lid (4)
On；
Computer Control Unit (5)：Respectively connection source nitrogen, low temperature flow container (15), upper lid operating system, valve rod operating mechanism and
Nitrogen system is tested, and exports testing result；
Described adjustable valve mounting seat (20) includes 2 V-blocks with valve standing finish, is fixed with the bottom of guide rail
Plate, bottom plate is bolted on cryogenic box (21) bottom surface, and 2 V-blocks fix valve (19) to be tested, and sliding on guide rail
It is dynamic.
2. the multi-functional automatic performance test device of a kind of Subzero valve according to claim 1, it is characterised in that described
The size and shape of 2 V-blocks matches with valve to be tested (19).
3. the multi-functional automatic performance test device of a kind of Subzero valve according to claim 1, it is characterised in that described
Upper lid (4), which is provided with two technique consents, each technique consent, is respectively provided with one for sealed technique stopple (22), detection
Before, two technique consents are opened, and insert flexible pipe connection Nitrogen source gases in wherein one hole, and the air in cryogenic box is replaced
Go out, then seal two technique consents with two technique stopples (22).
4. the multi-functional automatic performance test device of a kind of Subzero valve according to claim 3, it is characterised in that described
Low temperature flow container (15) is by switching the technique consent that switch is connected on upper lid (4), after the gas in cryogenic box (21) is discharged,
Work is blocked by switching to switch to switch the cryogenic liquid in low temperature flow container (15) being pressed into cryogenic box by same pipeline
Skill stopple (22) is low by being recovered to for the cryogenic liquid in cryogenic box by vavuum pump (14) and pipeline of sobbing after detection terminates
Warm flow container (15).
5. the multi-functional automatic performance test device of a kind of Subzero valve according to claim 1, it is characterised in that described
Pressure sensor (17) is installed on the fixing bolt of adpting flange (18), the change of the bolt coupling mechanism force in the environment of low temperature is tested
Situation, type selecting and locking for installation bolt provide design considerations.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310522050.1A CN104568397B (en) | 2013-10-29 | 2013-10-29 | A kind of multi-functional automatic performance test device of Subzero valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310522050.1A CN104568397B (en) | 2013-10-29 | 2013-10-29 | A kind of multi-functional automatic performance test device of Subzero valve |
Publications (2)
| Publication Number | Publication Date |
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| CN104568397A CN104568397A (en) | 2015-04-29 |
| CN104568397B true CN104568397B (en) | 2017-10-20 |
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| CN201310522050.1A Active CN104568397B (en) | 2013-10-29 | 2013-10-29 | A kind of multi-functional automatic performance test device of Subzero valve |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105758598A (en) * | 2016-04-22 | 2016-07-13 | 上海市特种设备监督检验技术研究院 | Low temperature test device of valve performance |
| CN106323557B (en) * | 2016-10-24 | 2018-08-14 | 河北科技大学 | Pressure-bearing parts method for conducting leak test and detection device under low temperature environment |
| CN106642994A (en) * | 2016-11-23 | 2017-05-10 | 安徽皖拓自动化有限公司 | Control system for cryogenic experiment device for low-temperature valve |
| 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 |
| CN108871741B (en) * | 2018-04-28 | 2023-03-14 | 上海齐耀动力技术有限公司 | Low-temperature valve low-temperature test clamping device and method thereof |
| CN108844732B (en) * | 2018-08-22 | 2020-01-31 | 长沙星沙新奥燃气有限公司 | Detection equipment for polyethylene ball valves |
| CN108776014A (en) * | 2018-09-08 | 2018-11-09 | 江苏容大材料腐蚀检验有限公司 | Valve detection machine |
| CN111504632B (en) * | 2020-04-20 | 2021-12-10 | 上海发电设备成套设计研究院有限责任公司 | Valve lifting force measuring device and system and lifting force coefficient test method |
| CN112362339B (en) * | 2020-11-16 | 2023-09-26 | 上海廷本流体控制有限公司 | Life testing device for low-temperature valve with air filling port |
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| JPS6088369A (en) * | 1983-10-21 | 1985-05-18 | Hitachi Ltd | Thermal shock testing apparatus |
| CN87214208U (en) * | 1987-10-14 | 1988-06-08 | 袁少勋 | Micro computer-controlled motor-driven device of valve |
| TW512925U (en) * | 2001-10-09 | 2002-12-01 | Chung Shan Inst Of Science | High-variability temperature testing device |
| CN2852090Y (en) * | 2005-12-26 | 2006-12-27 | 保一集团有限公司 | Low-temperature valve testing device based on computer data acquisition |
| CN101620023A (en) * | 2009-08-13 | 2010-01-06 | 鲁锋 | Valve detecting system |
| CN201653784U (en) * | 2009-12-31 | 2010-11-24 | 鲁西工业装备有限公司 | Low-temperature device for impact test |
| CN202267624U (en) * | 2011-07-29 | 2012-06-06 | 攀钢集团有限公司 | Low temperature test box |
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