CN108332958B - Multifunctional electromagnetic pneumatic stop valve test bed - Google Patents
Multifunctional electromagnetic pneumatic stop valve test bed Download PDFInfo
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- CN108332958B CN108332958B CN201810027125.1A CN201810027125A CN108332958B CN 108332958 B CN108332958 B CN 108332958B CN 201810027125 A CN201810027125 A CN 201810027125A CN 108332958 B CN108332958 B CN 108332958B
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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
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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
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2876—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for valves
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Abstract
The invention discloses a multifunctional electromagnetic pneumatic stop valve test bed which comprises a main passage pipeline system, a control gas circuit system, a helium pipeline system, a low-temperature pipeline system and a measurement and control system, wherein the main passage pipeline system comprises a first pressure reducing valve (4), a second stop valve (7), a first pressure sensor (12), a test station (20) and a second pressure sensor (13), one end of the control gas circuit system is arranged in the main passage pipeline in front of the first pressure reducing valve (4), the other end of the control gas circuit system is connected with the test station (20), outlets of the low-temperature pipeline system and the helium pipeline system are connected in the main passage pipeline between the second stop valve (7) and the first pressure sensor (12), and the measurement and control system comprises a signal collector and a PLC (programmable logic controller). The multifunctional electromagnetic pneumatic stop valve test bed can simultaneously meet the requirements of a normal-temperature airtight test, a normal-temperature functional test, a low-temperature airtight test, a low-temperature functional test and a response time test of an electromagnetic pneumatic stop valve.
Description
Technical Field
The invention belongs to the technical field of valve tests, and particularly relates to a multifunctional electromagnetic pneumatic stop valve test bed.
Background
The electromagnetic pneumatic stop valve is a valve which controls the opening and closing of an electromagnetic valve by controlling the on-off of current and further controls the discharge of an air source to control the opening or closing of the pneumatic stop valve, is used on an air path or a liquid path, is an automatic basic element for controlling fluid, and is used for adjusting the direction, flow rate, speed and other parameters of a medium in an industrial control system.
The air tightness test, the function test and the response time test of the electromagnetic pneumatic stop valve are necessary test items, the requirements of test beds for testing the electromagnetic pneumatic stop valve are different according to different working conditions and different drift diameters and working pressures, a special test bed needs to be designed according to the requirements of each electromagnetic pneumatic stop valve, the cost is high, the detection is complex, and therefore the test bed capable of meeting the test requirements of various electromagnetic pneumatic stop valves is needed; and the pipeline drift diameter in the compressed gas pipeline system of the general gas source station supply system is 10mm, and when the pipeline drift diameter of the electromagnetic pneumatic stop valve is larger than 10mm, the short-time flow is insufficient.
Disclosure of Invention
Aiming at the defects or improvement requirements in the prior art, the invention provides a multifunctional electromagnetic pneumatic stop valve test bed which comprises a normal-temperature pipeline control system, a helium pipeline system, a low-temperature pipeline system and a measurement and control system and can meet the test requirements of a normal-temperature airtight test, a normal-temperature functional test, a low-temperature airtight test, a low-temperature functional test and a response time test of an electromagnetic pneumatic stop valve at the same time.
In order to achieve the aim, the invention provides a multifunctional electromagnetic pneumatic stop valve test bed which comprises a main passage pipeline system, a control gas circuit system, a helium gas pipeline system, a low-temperature pipeline system and a measurement and control system;
the measurement and control system comprises a signal collector and a PLC (programmable logic controller), the signal collector comprises a first pressure sensor and a second pressure sensor, the signal collector is used for collecting information in each pipeline system, and the PLC is used for calculating the response time of the electromagnetic valve according to the information collected by the signal collector;
the main passage pipeline system sequentially comprises a first pressure reducing valve, a second stop valve, a first pressure sensor, a test station and a second pressure sensor from an air inlet to an outlet, and is used for judging the air tightness of the electromagnetic pneumatic stop valve according to the difference value of the first pressure sensor and the second pressure sensor;
one end of the control gas circuit system is arranged in a main passage pipeline in front of the first pressure reducing valve, and the other end of the control gas circuit system is connected with the test station and used for providing a gas source of a control valve of the electromagnetic pneumatic stop valve and carrying out corresponding gas tightness detection;
outlets of the low-temperature pipeline system and the helium pipeline system are connected in a main channel pipeline between the second stop valve and the first pressure sensor, the low-temperature pipeline system is used for precooling low-temperature performance detection, and the helium pipeline system is used for detecting low-temperature performance.
Further, the main passage pipeline system further comprises a first stop valve and a fifth stop valve, and the first stop valve and the fifth stop valve are respectively arranged at an air inlet and an outlet of the main passage correlation system.
Further, the main passage pipeline system further comprises an emptying stop valve, and the emptying stop valve comprises a first emptying stop valve and a third emptying stop valve.
Further, a filter is arranged between the air inlet and the first stop valve.
Further, a high-pressure gas cylinder is arranged between the first pressure reducing valve and the second stop valve.
Furthermore, in the main passage pipeline, the drift diameter from the high-pressure gas cylinder to the outlet of the main passage pipeline is not less than 40 mm.
Further, the control gas circuit system comprises a third pressure reducing valve, and a fourth pressure gauge is arranged between the third pressure reducing valve and the test station.
Further, the helium piping system is provided with a second pressure reducing valve and a third shut-off valve.
Further, the low-temperature pipeline system is provided with a fourth stop valve.
Further, the third stop valve, the fourth stop valve and the second stop valve are all low-temperature stop valves.
In general, compared with the prior art, the above technical solution contemplated by the present invention can achieve the following beneficial effects:
(1) the multifunctional electromagnetic pneumatic stop valve test bed comprises a normal-temperature pipeline control system, a helium pipeline system, a low-temperature pipeline system and a measurement and control system, and can meet the test requirements of a normal-temperature airtight test, a normal-temperature functional test, a low-temperature airtight test, a low-temperature functional test and a response time test of an electromagnetic valve at the same time.
(2) The multifunctional electromagnetic pneumatic stop valve test bed can simultaneously meet the normal-temperature airtight test of various electromagnetic valves with the electromagnetic pneumatic stop valve drift diameter of 40mm and the nominal pressure of less than 10 MPa.
(3) The invention discloses a multifunctional electromagnetic pneumatic stop valve test bed.A measurement and control system comprises a signal collector, a PLC (programmable logic controller) and a liquid crystal display screen, wherein the signal collector is used for collecting pressure signals, current signals and flow signals and storing the pressure signals, the current signals and the flow signals, and the signal collector sends information to the PLC for calculation and display through the liquid crystal display screen.
Drawings
FIG. 1 is a schematic structural diagram of a multifunctional electromagnetic pneumatic stop valve test bed according to an embodiment of the invention;
the labels in the figure are: 1-filter, 2-first stop valve, 3-first pressure gauge, 4-first pressure reducing valve, 5-high pressure gas cylinder, 6-second pressure gauge, 7-second stop valve, 8-second pressure reducing valve, 9-third pressure gauge, 10-third stop valve, 11-fourth stop valve, 12-first pressure sensor, 13-second pressure sensor, 14-fifth stop valve, 15-first emptying stop valve, 16-second emptying stop valve, 17-fourth pressure gauge, 18-third pressure reducing valve, 19-third emptying stop valve and 20-test station.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Fig. 1 is a schematic structural diagram of a multifunctional electromagnetic pneumatic stop valve test bed according to an embodiment of the invention. As shown in fig. 1, the test bed for the electromagnetic pneumatic stop valve comprises a main passage pipeline system, a control gas circuit system, a helium pipeline system, a cryogenic pipeline system and a measurement and control system, wherein the main passage pipeline system is sequentially connected with a filter 1, a first stop valve 2, a first pressure reducing valve 4, a high-pressure gas cylinder 5, a second stop valve 7, a first pressure sensor 12, a second pressure sensor 13 and a fifth stop valve 14 from an inlet to an outlet; the filter 1 is used for filtering gas flushed into a main channel pipeline system to prevent blockage; the first pressure reducing valve 4 is used for changing the pressure in the main passage pipeline so as to meet the requirements of different electromagnetic pneumatic stop valve test pressures; the high-pressure gas cylinder 5 is used for storing gas so as to meet the flow demand during the test of the large-drift-diameter electromagnetic pneumatic stop valve. The test station of the electromagnetic pneumatic stop valve is arranged between the first pressure sensor 12 and the second pressure sensor 13, and the measured values of the second pressure sensor 13 and the first pressure sensor are used for testing the air tightness of the electromagnetic valve. Be equipped with first manometer 3 between first stop valve 2 and the first relief pressure valve 4 for detect the pressure value in the pipeline before the decompression of first relief pressure valve 4, be equipped with second manometer 6 between gas cylinder 5 and the second stop valve 7, be used for detecting the pressure value in the pipeline after using high-pressure gas.
And a third emptying stop valve 19 is arranged between the first stop valve 2 and the first pressure reducing valve 4, a first emptying stop valve 15 is arranged between the second stop valve 7 and the test station 20, and the first emptying stop valve 15 and the third emptying stop valve 19 are used for emptying gas in the pipeline after the test is finished.
Wherein, the pipeline latus rectum between 5 to the export of high pressure gas cylinder is not less than 40mm to satisfy the experimental demand of the electromagnetism pneumatic stop valve of latus rectum below 40mm, and only need do corresponding connection frock at experimental station according to the demand of experimental electromagnetism pneumatic stop valve.
The control gas circuit system comprises a third pressure reducing valve 18, a fourth pressure gauge 17 and a second emptying stop valve 16, one end of the control gas circuit system is connected between the first pressure gauge 3 and the first pressure reducing valve 4, and the other end of the control gas circuit system is connected to a test station 20. And a second emptying stop valve 16 is arranged in the control gas circuit system and is used for controlling redundant gas in the gas circuit system after the emptying test is finished. Because the work of the electromagnetic pneumatic stop valve needs an independent air source to control the piston motion of the electromagnetic pneumatic stop valve, and further the opening and closing of the electromagnetic pneumatic stop valve are realized, the control air path system provides the pressure of the control air required by the pneumatic control for the electromagnetic pneumatic stop valve through the third reducing valve 18, and the control air path system is used for providing the air source of the control valve of the electromagnetic pneumatic stop valve and carrying out corresponding air tightness detection.
The helium pipeline system is sequentially provided with a second pressure reducing valve 8 and a third stop valve 10 from the air inlet, and a third pressure gauge 9 is arranged between the second pressure reducing valve 8 and the third stop valve 10 and used for detecting the pressure value in the helium pipeline after the pressure value passes through the second pressure reducing valve 8. The outlet of the helium pipeline is divided into two paths, one path is connected with the main path pipeline system through a tee joint, and the other path is connected with the low-temperature pipeline system. The cryogenic pipe system comprises a fourth shut-off valve 11.
The third stop valve 10, the fourth stop valve 11 and the second stop valve 7 are all low-temperature stop valves, and the first pressure sensor 12, the second pressure sensor 13, the second pressure gauge 6 and the fifth stop valve 14 are all parts which can be normally used at low temperature (-196 ℃).
The measurement and control system comprises a signal collector, a PLC (programmable logic controller) and a liquid crystal display screen, wherein the signal collector comprises a first pressure sensor 12, a second pressure sensor 13, a current signal collector, a flow signal collector and a memory, and the current signal collector is connected with the electromagnetic pneumatic stop valve on the test station 20 and used for detecting a current signal in the electromagnetic pneumatic stop valve; the flow signal collector is arranged in the pipelines of the main channel pipeline system, the control gas circuit system, the helium gas pipeline system and the low-temperature pipeline system and is used for detecting the flow in each pipeline system; the collected pressure information, current information and flow information are stored through a memory. The PLC is connected with the signal collector and the liquid crystal display screen and used for processing the collected information and displaying corresponding data on the liquid crystal display screen.
The main passage pipeline system and the control gas circuit system jointly form a normal temperature pipeline system.
And (3) normal-temperature air tightness test: close the valve of installing the pneumatic stop valve of electromagnetism on experimental station 20, make normal atmospheric temperature high pressure compressed gas supply main entrance pipe-line system through filter 1 and first stop valve 2, detect input pressure by the manometer, the decompression of rethread relief pressure valve makes pressure satisfy the demand of different pneumatic stop valve test pressures of electromagnetism, flow demand when satisfying big latus rectum pneumatic stop valve through high-pressure gas cylinder 5 and testing, detect the pressure value behind the high-pressure gas cylinder 5 through second manometer 6, the difference of rethread first pressure sensor 12 and second pressure sensor 13's pressure judges the gas tightness of the pneumatic stop valve of electromagnetism good or bad.
And (3) low-temperature air tightness test: closing the second stop valve 7 and the third stop valve 10, opening the fourth stop valve 11, and filling low-pressure liquid nitrogen into the low-temperature pipeline system, wherein the outlet of the low-temperature pipeline system is connected with a pipeline between the second stop valve 7 and the first pressure sensor 12 through a tee joint, and the low-pressure liquid nitrogen flows through the pipeline to pre-cool the low-temperature electromagnetic valve test; and closing the fourth stop valve 11 and the second stop valve 7, opening the third stop valve 10, filling helium into the low-temperature pipeline system, reducing the pressure of the filled gas to the pressure required by the test through the second pressure reducing valve 8, and judging the low-temperature air tightness of the electromagnetic pneumatic stop valve through the pressure difference between the first pressure sensor 12 and the second pressure sensor 13.
Response time test: the electromagnetic pneumatic stop valve is controlled to be opened and closed by controlling the on-off of current, further the air source is controlled to be discharged to control the on-off of the pneumatic stop valve, the data of the inlet pressure sensor of the pneumatic stop valve is collected through the signal collector, and the response time is obtained through calculation of the PLC.
The normal temperature function test and the low temperature function test are mainly used for detecting the performance of the electromagnetic pneumatic cut-off valve switch, if the corresponding time is within 1s, the switch is normal, and if the response time exceeds 1s, the switch is abnormal, namely the performance is poor.
Preferably, the low-temperature pipeline system can provide low-pressure liquid nitrogen of 0-3 MPa for the electromagnetic pneumatic stop valve for the test and is used for precooling the low-temperature test of the electromagnetic pneumatic stop valve;
preferably, the second stop valve 7 and the fifth stop valve 14 are stop valves with a drift diameter not less than 40mm and a flow resistance less than 5% of rated pressure.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. A multifunctional electromagnetic pneumatic stop valve test bed is characterized by comprising a main channel pipeline system, a control gas circuit system, a helium pipeline system, a low-temperature pipeline system and a measurement and control system;
the measurement and control system comprises a signal collector and a PLC (programmable logic controller), the signal collector comprises a first pressure sensor (12) and a second pressure sensor (13), the signal collector is used for collecting information in each pipeline system, and the PLC is used for calculating the response time of the electromagnetic valve according to the information collected by the signal collector;
the main passage pipeline system sequentially comprises a first pressure reducing valve (4), a second stop valve (7), the first pressure sensor (12), a test station (20) and the second pressure sensor (13) from an air inlet to an outlet, and is used for judging the air tightness of the electromagnetic pneumatic stop valve according to the difference value of the first pressure sensor (12) and the second pressure sensor (13);
one end of the control gas circuit system is arranged in a main passage pipeline in front of the first pressure reducing valve (4), and the other end of the control gas circuit system is connected with the test station (20) and is used for providing a gas source of a control valve of the electromagnetic pneumatic stop valve and carrying out corresponding air tightness detection;
low temperature pipe-line system and helium pipe-line system exit linkage second stop valve (7) with in the main access pipeline between first pressure sensor (12), helium pipe-line system is equipped with third stop valve (10), be equipped with fourth stop valve (11) in the low temperature pipe-line system, low temperature pipe-line system is used for the precooling that low temperature performance detected, helium pipe-line system is used for the detection of low temperature performance.
2. A multi-functional electro-magnetic pneumatic shut-off valve test stand according to claim 1, characterized in that the main passageway pipe system further comprises a first shut-off valve (2) and a fifth shut-off valve (14), the first shut-off valve (2) and the fifth shut-off valve (14) being provided at an air inlet and an outlet of the main passageway pipe system, respectively.
3. A multifunctional electromagnetic pneumatic stop valve test bench according to claim 2, characterized in that the main passage piping system further comprises a blow-off stop valve, which comprises a first blow-off stop valve (15) and a third blow-off stop valve (19).
4. A multifunctional electromagnetic pneumatic stop valve test bench according to claim 2, characterized in that a filter (1) is arranged between the air inlet and the first stop valve (2).
5. A multifunctional electromagnetic pneumatic stop valve test bench as claimed in claim 1, characterized in that a high-pressure gas cylinder (5) is arranged between the first pressure reducing valve (4) and the second stop valve (7).
6. The multifunctional electromagnetic pneumatic stop valve test bed according to claim 5, wherein the diameter from the high-pressure gas cylinder (5) to the outlet of the main passage pipeline in the main passage pipeline is not less than 40 mm.
7. The multifunctional electromagnetic pneumatic stop valve test bed according to claim 1, characterized in that the control gas circuit system comprises a third pressure reducing valve (18), and a fourth pressure gauge (17) is arranged between the third pressure reducing valve (18) and the test station (20).
8. A multifunctional electromagnetic pneumatic stop valve test stand according to claim 1, characterized in that the helium piping system is provided with a second pressure reducing valve (8).
9. The multifunctional electromagnetic pneumatic stop valve test bed according to claim 1, wherein the third stop valve (10), the fourth stop valve (11) and the second stop valve (7) are all low-temperature stop valves.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810027125.1A CN108332958B (en) | 2018-01-11 | 2018-01-11 | Multifunctional electromagnetic pneumatic stop valve test bed |
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| CN201810027125.1A CN108332958B (en) | 2018-01-11 | 2018-01-11 | Multifunctional electromagnetic pneumatic stop valve test bed |
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| CN108332958A CN108332958A (en) | 2018-07-27 |
| CN108332958B true CN108332958B (en) | 2019-12-24 |
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| CN113484231B (en) * | 2021-07-09 | 2023-06-16 | 中国人民解放军63796部队 | Online testing method for friction force of low-temperature pneumatic stop valve |
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