CN209673361U - A kind of intelligent valve testboard - Google Patents
A kind of intelligent valve testboard Download PDFInfo
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- CN209673361U CN209673361U CN201920709838.6U CN201920709838U CN209673361U CN 209673361 U CN209673361 U CN 209673361U CN 201920709838 U CN201920709838 U CN 201920709838U CN 209673361 U CN209673361 U CN 209673361U
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Abstract
The utility model discloses a kind of intelligent valve testboards, including gas source unit, clamping device and control recording unit, the gas source unit includes air compressor, first surge tank, second surge tank and vacuum pump, the clamping device includes clamping bench, the clamping bench side is equipped with aperture, sliding groove is equipped at the top of the aperture, sealing plate is equipped with inside the sliding groove, the sealing plate surface is equipped with the first hexagon socket head cap screw, the sealing plate is fixedly connected by the first hexagon socket head cap screw with clamping bench, first hexagon socket head cap screw side is equipped with clip, the clip surface is equipped with the second hexagon socket head cap screw, the clip is fixedly connected by the second hexagon socket head cap screw with sealing plate.The utility model is by being equipped with gas source unit and control recording unit, computer corrects the breathing valve opening pressure measured and data on flows according to temperature and air pressure, valve test platform uses flow sub-control principle, to improve by flow and pressure as the testing precision of the breather valve of index.
Description
Technical field
The utility model relates to breather valve the field of test technology, in particular to a kind of intelligent valve testboard.
Background technique
For the quality for the valve that ensures respiration, before factory must cracking pressure to breather valve and leakproofness test, use
Also breather valve is periodically detected in the process, with prevent breather valve due to freeze, corrode or product quality in terms of
Reason stops working or sealing performance decline.
Existing breathing valve opening pressure determines that method has theoretical calculation and manual test method, the former is according to valve disc quality
Cracking pressure is calculated, for result often with practical cracking pressure there are relatively large deviation, the latter generally uses U-tube pressure gauge to survey pressure
Power needs artificial observation pressure gauge data the disadvantage is that measured data is unable to Real-time Feedback, and this pressure gauge is easy by temperature and humidity
It is also required to artificial observation with the release pressure numerical value of the influence of ambient atmosphere pressure, while breather valve, causes really reflect feelings
Condition has that bulky, the degree of automation is low low with detection accuracy, and in addition some breather valve testboard can not be surveyed
The data for obtaining amount of leakage, can not accomplish that testboard function is complete.
Therefore, it is necessary to solve the above problems to invent a kind of intelligent valve testboard.
Utility model content
The purpose of this utility model is to provide a kind of intelligent valve testboard, computer is surveyed according to temperature and air pressure correction
The breathing valve opening pressure and data on flows obtained, valve test platform use flow sub-control principle, to improve by flow and pressure as finger
The testing precision of target breather valve, using computer interlocked control, other than four-way valve needs manual switch, all fingers
Order can be inputted and be completed on computers, and all instrumented datas can be shown on computers, and can be by calculating
Machine directly outputs test result, easy to use, has used the first surge tank and the second surge tank, the air pressure wave of buffer system
It is dynamic, be conducive to keep the flowing of air in systems more stable, the flow and pressure change of steady testing air, to solve above-mentioned back
The problem of being proposed in scape technology.
To achieve the above object, the utility model provides the following technical solutions: a kind of intelligent valve testboard, including gas source
Unit, clamping device and control recording unit, the gas source unit includes air compressor, the first surge tank, the second surge tank
And vacuum pump, the clamping device include clamping bench, the clamping bench side is equipped with aperture, is equipped with sliding at the top of the aperture
Slot, is equipped with sealing plate inside the sliding groove, and the sealing plate surface is equipped with the first hexagon socket head cap screw, and the sealing plate passes through the
One hexagon socket head cap screw is fixedly connected with clamping bench, and first hexagon socket head cap screw side is equipped with clip, and the clip surface is equipped with
Second hexagon socket head cap screw, the clip are fixedly connected by the second hexagon socket head cap screw with sealing plate, the control recording unit packet
Include the first full signal adjustment type silicon pressure sensor, the first heat-conducting flow meter, four-way valve, the first electronic needle valve, blow valve,
Air gauge, the first thermometer, the first gate valve, the second full signal adjustment type silicon pressure sensor, the second heat-conducting flow meter, second
Electronic needle valve, second temperature meter, the second gate valve, digital/analog signal converter, signal amplifier, central processing unit and meter
Calculation machine.
Preferably, the air compressor output end is equipped with the first gate valve, and it is slow that the first gate valve output end is equipped with first
Tank is rushed, the first surge tank output end is equipped with the first electronic needle valve, is equipped with the first heat inside the first electronic needle valve
Conduct flowmeter.
Preferably, the first heat-conducting flow meter side is equipped with the first full signal adjustment type silicon pressure sensor, described
First full signal adjustment type silicon pressure sensor side is equipped with the first thermometer.
Preferably, the described first electronic needle valve output end is equipped with four-way valve, and the four-way valve is fixedly connected with clamping bench,
The four-way valve bottom is equipped with blow valve, is equipped with second temperature meter inside the four-way valve.
Preferably, the four-way valve output end is equipped with the second electronic needle valve, is equipped with inside the second electronic needle valve
Second heat-conducting flow meter, the second heat-conducting flow meter side are equipped with the second full signal adjustment type silicon pressure sensor.
Preferably, the described second electronic needle valve output end is equipped with the second surge tank, and the second surge tank output end is set
There is the second gate valve, the second gate valve output end is equipped with vacuum pump.
The technical effect and advantage of the utility model:
1, by being equipped with gas source unit and control recording unit, computer corrects the breather valve measured according to temperature and air pressure
Cracking pressure and data on flows, valve test platform use flow sub-control principle, to improve by flow and pressure as the breather valve of index
Testing precision, using computer interlocked control, other than four-way valve needs manual switch, all instructions can be
It inputs and completes on computer, all instrumented datas can be shown on computers, and can directly be exported by computer
Test result, it is easy to use, the first surge tank and the second surge tank are used, the air pressure fluctuation of buffer system is conducive to
Keep the flowing of air in systems more stable, the flow and pressure change of steady testing air；
2, by being equipped with clamping device, four-way valve is connect by pipeline with clamping bench bottom, and aperture is arranged at clamping bench bottom, so
It is connect afterwards with sealing plate, sealing plate bottom is connect with pipeline, and the edge of sealing plate sets four clips, and clip passes through six in first
Corner bolt is mounted on sliding groove, and clip horizontal sliding in sliding groove can be allowed to twist when breather valve is placed on sealing plate
The first hexagon socket head cap screw and the second hexagon socket head cap screw on tight clip and sealing plate, can fix breather valve, can be to sealing
Disk is replaced, and is promoted fixed efficiency, is increased fixed stability.
Detailed description of the invention
Fig. 1 is the overall structure diagram of the utility model.
Fig. 2 is the clamping device top view of the utility model.
Fig. 3 is the clamping device cross-sectional view of the utility model.
Fig. 4 is the system structure diagram of the utility model.
In figure: 1 gas source unit, 2 clamping devices, 3 control recording units, 4 air compressors, 5 first surge tanks, 6 second
Surge tank, 7 vacuum pumps, 8 clamping benchs, 9 apertures, 10 sliding grooves, 11 sealing plates, 12 first hexagon socket head cap screws, 13 clips, 14 second
Hexagon socket head cap screw, 15 first full signal adjustment type Silicon pressures sensing, 16 first heat-conducting flow meters, 17 four-way valves, 18 first electricity
Dynamic needle valve, 19 blow valves, 20 air gauges, 21 first thermometers, 22 first gate valves, 23 second full signal adjustment type Silicon pressures pass
Sensor, 24 second heat-conducting flow meters, 25 second electronic needle valves, 26 second temperature meters, 27 second gate valves, 28 digital-to-analogs
Signal adapter, 29 signal amplifiers, 30 central processing units, 31 computers.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
The utility model provides a kind of intelligent valve testboard as shown in Figs 1-4, including gas source unit 1, clamping dress
2 and control recording unit 3 are set, the gas source unit 1 includes air compressor 4, the first surge tank 5, the second surge tank 6 and vacuum
Pump 7, the clamping device 2 include clamping bench 8, and 8 side of clamping bench is equipped with aperture 9, is equipped with sliding groove at the top of the aperture 9
10, sealing plate 11 is equipped with inside the sliding groove 10,11 surface of sealing plate is equipped with the first hexagon socket head cap screw 12, the sealing
Plate 11 is fixedly connected by the first hexagon socket head cap screw 12 with clamping bench 8, and 12 side of the first hexagon socket head cap screw is equipped with clip 13,
13 surface of clip is equipped with the second hexagon socket head cap screw 14, and the clip 13 is solid by the second hexagon socket head cap screw 14 and sealing plate 11
Fixed connection, by being equipped with clamping device 2, four-way valve 17 is connect by pipeline with 8 bottom of clamping bench, and aperture is arranged at 8 bottom of clamping bench
9, it is then connect with sealing plate 11,11 bottom of sealing plate is connect with pipeline, and the edge of sealing plate 11 sets four clips 13, clip
13 are mounted on sliding groove 10 by the first hexagon socket head cap screw 12, can allow clip 13 is horizontal in sliding groove 10 to slide, work as breathing
When valve is placed on sealing plate 11, hexagonal spiral shell in the first hexagon socket head cap screw 12 and second on clip 13 and sealing plate 11 is tightened
Bolt 14 can fix breather valve, can replace to seal disc, promote fixed efficiency, increase fixed stability, described
Control recording unit 3 include the first full signal adjustment type silicon pressure sensor 15, the first heat-conducting flow meter 16, four-way valve 17,
First electronic needle valve 18, blow valve 19, air gauge 20, the first thermometer 21, the first gate valve 22, the second full signal adjustment type silicon
Pressure sensor 23, the second heat-conducting flow meter 24, the second electronic needle valve 25, second temperature meter 26, the second gate valve 27, number
Word/analog signal converter 28, signal amplifier 29, central processing unit 30 and computer 31, by being equipped with gas source unit 1 and control
Recording unit 3 processed, air compressor 4, vacuum pump 7, the first full signal adjustment type silicon pressure sensor 15, the first heat transfer flow
Count 16, four-way valve 17, the first electronic needle valve 18, blow valve 19, air gauge 20, the first thermometer 21, the first gate valve 22, second
Full signal adjustment type silicon pressure sensor 23, the second heat-conducting flow meter 24, the second electronic needle valve 25, second temperature meter 26,
Second gate valve 27 and signal amplifier 29 are connect with 28 signal of digital/analog signal converter, signal amplifier 29 and calculating
Machine 31 is electrically connected with central processing unit 30, computer 31 according to temperature and the air pressure breathing valve opening pressure that measures of correction and
Data on flows, valve test platform use flow sub-control principle, accurate as the test of the breather valve of index by flow and pressure to improve
Degree, using 31 interlocked control of computer, other than four-way valve 17 needs manual switch, all instructions can be in computer
It inputs and completes on 31, all instrumented datas can be shown on computer 31, and can directly be exported by computer 31
Test result, it is easy to use, the first surge tank 5 and the second surge tank 6 are used, the air pressure of buffer system fluctuates, favorably
In keeping the flowing of air in systems more stable, the flow and pressure change of steady testing air.
Further, in the above-mentioned technical solutions, 4 output end of air compressor is equipped with the first gate valve 22, and described the
One gate valve, 22 output end is equipped with the first surge tank 5, and 5 output end of the first surge tank is equipped with the first electronic needle valve 18, described
It is equipped with the first heat-conducting flow meter 16 inside first electronic needle valve 18, opens air compressor 4 and the first gate valve 22, closes true
Sky pump 7, compressed air keeps pressure by the first surge tank 5, and air is allowed uniformly to pass through pipeline into breather valve to be measured, then
It is discharged by breather valve pressure end valve disc, blow valve 19 is closed state at this time, and electric signal also can control relevant pressure point
The first electronic needle valve 25 of electronic needle valve 18 or the second of section, opens corresponding first needle valve or the second needle valve allows gas
Stream is flowed through from corresponding pipeline, and the first full signal adjustment type silicon pressure sensor 15 and the first heat-conducting flow meter 16 record pass through
Air pressure and flow, the result of obtained pressure and flow is by digital/analog signal converter feedback to central processing unit
30 and result is shown on computer 31；
Further, in the above-mentioned technical solutions, 16 side of the first heat-conducting flow meter is equipped with the first full signal tune
Nodal pattern silicon pressure sensor 15,15 side of the first full signal adjustment type silicon pressure sensor are equipped with the first thermometer 21, In
Increase by the first thermometer 21 in air pipeline between first full signal adjustment type silicon pressure sensor 15 and breather valve to be measured, first
Air themperature data pass to signal amplifier 29 by digital/analog signal converter in the pipeline that thermometer 21 is tested, letter
Number amplifier 29 receives and is transferred to computer 31 by central processing unit 30 after data, while air gauge 20 measures current gas pressure,
Data are also transmitted to computer 31, and computer 31 corrects the breathing valve opening pressure and flow number measured according to temperature and air pressure
According to；
Further, in the above-mentioned technical solutions, the described first electronic 18 output end of needle valve is equipped with four-way valve 17, described
Four-way valve 17 is fixedly connected with clamping bench 8, and 17 bottom of four-way valve is equipped with blow valve 19, and the is equipped with inside the four-way valve 17
Two thermometers 26, air keep pressure by the second surge tank 6, are extracted by breather valve vacuum end valve disc, at this time the second electricity
Dynamic needle valve 25 is constantly in open state, the second full signal adjustment type silicon pressure sensor 23 and the second heat-conducting flow meter 24
Record the air pressure that passes through and flow, the result of obtained pressure and flow by digital/analog signal converter feedback to
Central processing unit 30 is simultaneously shown on computer 31 as a result, increasing by the second temperature between the second electronic needle valve 25 and breather valve to be measured
Degree counts 26, and air themperature data pass to signal by digital/analog signal converter in the pipeline that second temperature meter 26 is tested
Amplifier 29；
Further, in the above-mentioned technical solutions, 17 output end of four-way valve is equipped with the second electronic needle valve 25, described
The second heat-conducting flow meter 24 is equipped with inside second electronic needle valve 25,24 side of the second heat-conducting flow meter is equipped with second
Full signal adjustment type silicon pressure sensor 23；
Further, in the above-mentioned technical solutions, the described second electronic 25 output end of needle valve is equipped with the second surge tank 6,
Second surge tank, 6 output end is equipped with the second gate valve 27, and 27 output end of the second gate valve is equipped with vacuum pump 7, signal amplification
Device 29 receives and is transferred to computer 31 by central processing unit 30 after data, while pressure gauge measures current gas pressure, and data also pass
It is defeated by computer 31, computer 31 corrects the breathing valve opening pressure measured and data on flows, valve test according to temperature and air pressure
Platform uses flow sub-control principle, to improve by flow and pressure as the testing precision of the breather valve of index；
Further, in the above-mentioned technical solutions, the first full signal adjustment type silicon pressure sensor 15 and second is complete
23 model of Signal Regulation type silicon pressure sensor is disposed as MPX5000.
This practical working principle:
Referring to Figure of description 1-4, air compressor 4, vacuum pump 7, the first full signal adjustment type silicon pressure sensor 15,
First heat-conducting flow meter 16, four-way valve 17, the first electronic needle valve 18, blow valve 19, air gauge 20, the first thermometer 21,
First gate valve 22, the second full signal adjustment type silicon pressure sensor 23, the second heat-conducting flow meter 24, the second electronic needle valve
25, second temperature meter 26, the second gate valve 27 and signal amplifier 29 are connect with 28 signal of digital/analog signal converter, letter
Number amplifier 29 and computer 31 are electrically connected with central processing unit 30, when test breather valve pressure end valve disc cracking pressure and
When amount of leakage, four-way valve 17 is opened to left direction, and the pressure end cracking pressure index for the breather valve tested as needed passes through
Computer 31 sends instruction to central processing unit 30, and central processing unit 30 receives the instruction of logger computer 31, by signal
Amplifier 29 and number/analog signal converter 28 open air compressor 4 and the first gate valve 22, close vacuum pump 7, compression
Air keeps pressure by the first surge tank 5, allows air uniformly to pass through pipeline into breather valve to be measured, then passes through breather valve
Pressure end valve disc is discharged, and blow valve 19 is closed state at this time, and electric signal also can control the first electricity of relevant pressure segmentation
The dynamic electronic needle valve 25 of needle valve 18 or the second opens corresponding first needle valve or the second needle valve by air-flow from respective tube
Road flows through, the first full signal adjustment type silicon pressure sensor 15 and the first heat-conducting flow meter 16 air pressure for passing through of record and
The result of flow, obtained pressure and flow to central processing unit 30 and is being calculated by digital/analog signal converter feedback
Display in air pipeline between the first full signal adjustment type silicon pressure sensor 15 and breather valve to be measured as a result, increasing on machine 31
First thermometer 21, air themperature data are passed by digital/analog signal converter in the pipeline that the first thermometer 21 is tested
To signal amplifier 29, signal amplifier 29 receives and is transferred to computer 31, while air pressure by central processing unit 30 after data
Table 20 measures current gas pressure, and data are also transmitted to computer 31, and computer 31 corrects the breather valve measured according to temperature and air pressure
Cracking pressure and data on flows, when needing to test breather valve vacuum end valve disc cracking pressure and amount of leakage, four-way valve 17 to
The right direction is opened, and the unlatching of blow valve 19 drains air in breather valve to be measured, is then turned off, the breather valve tested as needed
Vacuum end cracking pressure index, instruction is sent to central processing unit 30 by computer 31, central processing unit 30 receives meter
The instruction of calculation machine 31 opens vacuum pump 7 and the second gate valve 27 by signal amplifier 29 and number/analog signal converter 28,
Air compressor 4 is closed, air keeps pressure by the second surge tank 6, is extracted by breather valve vacuum end valve disc, and at this time the
Two electronic needle valves 25 are constantly in open state, the second full signal adjustment type silicon pressure sensor 23 and the second heat transfer flow
The air pressure and flow that 24 record of meter passes through, the result of obtained pressure and flow are anti-by digital/analog signal converter
Feed central processing unit 30 and on computer 31 display as a result, increasing by the between the second electronic needle valve 25 and breather valve to be measured
Two thermometers 26, air themperature data are passed to by digital/analog signal converter in the pipeline that second temperature meter 26 is tested
Signal amplifier 29, signal amplifier 29 receive and are transferred to computer 31, while pressure gauge by central processing unit 30 after data
Current gas pressure is measured, data are also transmitted to computer 31, and computer 31 is opened according to the breather valve that temperature and air pressure correction measure
Pressure and data on flows, valve test platform use flow sub-control principle, to improve by flow and pressure as the survey of the breather valve of index
Accuracy is tried, using 31 interlocked control of computer, other than four-way valve 17 needs manual switch, all instructions can be
It inputs and completes on computer 31, all instrumented datas can be shown on computer 31, and can be straight by computer 31
It connects and outputs test result, it is easy to use, use the first surge tank 5 and the second surge tank 6, the air pressure wave of buffer system
It is dynamic, keep the flowing of air in systems more stable, the flow and pressure change of steady testing air；
Referring to Figure of description 3, four-way valve 17 is connect by pipeline with 8 bottom of clamping bench, and aperture 9 is arranged at 8 bottom of clamping bench,
Then it is connect with sealing plate 11,11 bottom of sealing plate is connect with pipeline, and the edge of sealing plate 11 sets four clips 13, clip 13
It is mounted on sliding groove 10 by the first hexagon socket head cap screw 12, can allow clip 13 is horizontal in sliding groove 10 to slide, work as breather valve
When being placed on sealing plate 11, the first hexagon socket head cap screw 12 and the second hexagon socket head cap screw on clip 13 and sealing plate 11 are tightened
14, breather valve can be fixed, seal disc can be replaced, fixed efficiency is promoted, increases fixed stability.
Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention, it is not limited to this
Utility model, although the utility model is described in detail with reference to the foregoing embodiments, for those skilled in the art
For, it is still possible to modify the technical solutions described in the foregoing embodiments, or to part of technical characteristic
It is equivalently replaced, within the spirit and principle of the utility model, any modification, equivalent replacement, improvement and so on,
It should be included within the scope of protection of this utility model.
Claims (6)
1. a kind of intelligent valve testboard, it is characterised in that: including gas source unit (1), clamping device (2) and control recording unit
(3), the gas source unit (1) includes air compressor (4), the first surge tank (5), the second surge tank (6) and vacuum pump (7),
The clamping device (2) includes clamping bench (8), and clamping bench (8) side is equipped with aperture (9), is equipped at the top of the aperture (9)
Sliding groove (10), the sliding groove (10) is internal to be equipped with sealing plate (11), and sealing plate (11) surface is equipped with hexagonal in first
Bolt (12), the sealing plate (11) is fixedly connected by the first hexagon socket head cap screw (12) with clamping bench (8), six in described first
Corner bolt (12) side is equipped with clip (13), and clip (13) surface is equipped with the second hexagon socket head cap screw (14), the clip
(13) it is fixedly connected by the second hexagon socket head cap screw (14) with sealing plate (11), the control recording unit (3) includes first complete
Signal Regulation type silicon pressure sensor (15), the first heat-conducting flow meter (16), four-way valve (17), the first electronic needle valve
(18), blow valve (19), air gauge (20), the first thermometer (21), the first gate valve (22), the second full signal adjustment type Silicon pressure
Sensor (23), the second heat-conducting flow meter (24), the second electronic needle valve (25), second temperature meter (26), the second gate valve
(27), digital/analog signal converter (28), signal amplifier (29), central processing unit (30) and computer (31).
2. a kind of intelligent valve testboard according to claim 1, it is characterised in that: air compressor (4) output
End is equipped with the first gate valve (22), and the first gate valve (22) output end is equipped with the first surge tank (5), first surge tank (5)
Output end is equipped with the first electronic needle valve (18), is equipped with the first heat-conducting flow meter inside the first electronic needle valve (18)
(16)。
3. a kind of intelligent valve testboard according to claim 1, it is characterised in that: the first heat-conducting flow meter
(16) side is equipped with the first full signal adjustment type silicon pressure sensor (15), the first full signal adjustment type silicon pressure sensor
(15) side is equipped with the first thermometer (21).
4. a kind of intelligent valve testboard according to claim 1, it is characterised in that: the first electronic needle valve (18)
Output end is equipped with four-way valve (17), and the four-way valve (17) is fixedly connected with clamping bench (8), and four-way valve (17) bottom is equipped with
Blow valve (19), the four-way valve (17) is internal to be equipped with second temperature meter (26).
5. a kind of intelligent valve testboard according to claim 1, it is characterised in that: four-way valve (17) output end is set
There is the second electronic needle valve (25), is equipped with the second heat-conducting flow meter (24) inside the second electronic needle valve (25), it is described
Second heat-conducting flow meter (24) side is equipped with the second full signal adjustment type silicon pressure sensor (23).
6. a kind of intelligent valve testboard according to claim 1, it is characterised in that: the second electronic needle valve (25)
Output end is equipped with the second surge tank (6), and the second surge tank (6) output end is equipped with the second gate valve (27), second gate valve
(27) output end is equipped with vacuum pump (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920709838.6U CN209673361U (en) | 2019-05-17 | 2019-05-17 | A kind of intelligent valve testboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920709838.6U CN209673361U (en) | 2019-05-17 | 2019-05-17 | A kind of intelligent valve testboard |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209673361U true CN209673361U (en) | 2019-11-22 |
Family
ID=68575227
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920709838.6U Active CN209673361U (en) | 2019-05-17 | 2019-05-17 | A kind of intelligent valve testboard |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111076922A (en) * | 2019-12-17 | 2020-04-28 | 重庆南方数控设备股份有限公司 | Method for judging working state of electromagnetic valve based on pressure detection |
-
2019
- 2019-05-17 CN CN201920709838.6U patent/CN209673361U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111076922A (en) * | 2019-12-17 | 2020-04-28 | 重庆南方数控设备股份有限公司 | Method for judging working state of electromagnetic valve based on pressure detection |
| CN111076922B (en) * | 2019-12-17 | 2021-09-24 | 重庆南方数控设备股份有限公司 | Method for judging working state of electromagnetic valve based on pressure detection |
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