CN108775992A - A kind of simple multifunctional operated pneumatic valve leak detection device and leakage inspection method - Google Patents
A kind of simple multifunctional operated pneumatic valve leak detection device and leakage inspection method Download PDFInfo
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- CN108775992A CN108775992A CN201810750178.6A CN201810750178A CN108775992A CN 108775992 A CN108775992 A CN 108775992A CN 201810750178 A CN201810750178 A CN 201810750178A CN 108775992 A CN108775992 A CN 108775992A
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- 238000001514 detection method Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000007689 inspection Methods 0.000 title claims abstract description 8
- 238000001914 filtration Methods 0.000 claims abstract description 24
- 238000007789 sealing Methods 0.000 claims description 33
- 230000008676 import Effects 0.000 claims description 8
- 230000033228 biological regulation Effects 0.000 claims description 6
- 230000001276 controlling effect Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
- Indication Of The Valve Opening Or Closing Status (AREA)
Abstract
The present invention relates to a kind of simple multifunctional operated pneumatic valve leak detection device and leakage inspection methods.The leak detection device includes air supply unit and the first gas circuit being connect with the air supply unit and the second gas circuit；Two-position switch valve, the first filtering pressure reducing valve and the two five logical control valves being sequentially arranged along airflow direction are installed in first gas circuit, the second filtering pressure reducing valve and spinner flowmeter being sequentially arranged along airflow direction are installed in second gas circuit.The present invention can judge operated pneumatic valve seal leakage situation with simple and quick, and can make positioning in piston seal face leakage position to cylinder, consequently facilitating quickly making assessment to the safety in operation of corresponding process units.I.e. present invention ensures that safety that operated pneumatic valve uses and stability.
Description
Technical field
The invention belongs to valve detection technical field, be specifically related to a kind of simple multifunctional operated pneumatic valve leak detection device with
And leakage inspection method.
Background technology
Industrial instruments regulating valve is mostly pneumatic control valve, valve in the long-term use, since valve frequently moves
Work or medium erosion corrosion etc. cause valve seal surface wear, valve seal performance to decline；Meanwhile executing agency's piston or
The frequent movement of diaphragm also results in executing agency's gas leakage, the phenomenon that valve fluctuation occur or lose adjustment effect.These phenomenons
All there is sizable harm to producing.Reason cannot be quickly found after generally there are these failures, for manufacturing enterprise,
It will produce considerable damage.
Invention content
In order to solve the above technical problem, the present invention provides a kind of simple multifunctional operated pneumatic valve leak detection device and leakage detections
Method.
In order to achieve the object of the present invention, present invention employs following technical schemes：
A kind of simple multifunctional operated pneumatic valve leak detection device, including air supply unit and connect with the air supply unit
One gas circuit and the second gas circuit；The two-position switch valve being sequentially arranged along airflow direction, the first filtering are installed in first gas circuit
Pressure reducing valve and two five logical control valves are equipped with the second filtering decompression being sequentially arranged along airflow direction in second gas circuit
Valve and spinner flowmeter.
Further technical solution：It is equipped with and first gas circuit between the two-position switch valve, the first filtering pressure reducing valve
Connection and the control gas circuit that gas circuit switching is carried out for controlling described two five logical control valves, the control gas circuit are equipped with and are used for
The reversing three-way valve whether switching control gas circuit ventilates.
Further technical solution：When valve body sealing surface leakage detection, the first venthole of described two five logical control valves with
The air inlet connection of cylinder, the second venthole of described two five logical control valves go out with cylinder in operated pneumatic valve in operated pneumatic valve
Gas port is connected to, and second gas circuit outlet end is communicated with the valve body import of operated pneumatic valve；When cylinder seal face leakage detection, described
Two gas circuit outlet ends are connected to the air inlet of cylinder in operated pneumatic valve.
A kind of leakage inspection method based on the simple multifunctional operated pneumatic valve leak detection device, including valve body sealing surface leakage detection
And cylinder seal face leakage detection；
Steps are as follows for the valve body sealing surface leakage detection：
Step 1, the first venthole of described two five logical control valves is connected to the air inlet of cylinder in operated pneumatic valve, institute
The second venthole for stating two five logical control valves is connected to the gas outlet of cylinder in operated pneumatic valve, second gas circuit outlet end with
The valve body import of operated pneumatic valve communicates；
Step 2, open two-position switch valve, adjust the first filtering pressure reducing valve pressure show value to cylinder drive rated pressure with
Realize that piston moves and keeps valve in the completely closed state, while by the second filtering pressure reducing valve and spinner flowmeter
Aperture regulation is to maximum；
Step 3, after pressure stability in second gas circuit, the spinner flowmeter is observed, if the spinner flowmeter
Show value is zero, then illustrates the valve body sealing surface No leakage, otherwise illustrates that the valve body sealing surface has leakage；
Steps are as follows for cylinder seal face leakage detection：
Step 1, second gas circuit outlet end is connected to the air inlet of cylinder in operated pneumatic valve；
Step 2, it by spinner flowmeter aperture regulation to maximum, and slowly adjusts the second filtering pressure reducing valve pressure and shows
Value is moved with to realize piston and valve is made to be in setting aperture, is then stopped adjusting second filtering pressure reducing valve and be seen
The spinner flowmeter is examined, if the spinner flowmeter show value is zero, illustrates cylinder and piston sealing surface No leakage, otherwise
Illustrate that cylinder and piston sealing surface has leakage；
Step 3, above step 1, step 2 are repeated so that valve is in multiple apertures, and determines in each aperture lower cylinder
The leak case of sealing surface.
Further technical solution：The valve body sealing surface leakage detection step repeats repeatedly, and the valve body sealing surface is looked into
It leaks and controls the reversing three-way valve in gas circuit by switching described two five logical control valves to realize cylinder before step repeats every time
Inner carrier moves back and forth.
The beneficial effects of the present invention are：
The present invention can judge operated pneumatic valve seal leakage situation with simple and quick, and can be close to cylinder and piston
Positioning is made in cover leakage position, consequently facilitating quickly making assessment to the safety in operation of corresponding process units.It is i.e. of the invention
Ensure the safety and stability that operated pneumatic valve uses.
Description of the drawings
Fig. 1 is valve body sealing surface leakage detection mounting structure schematic diagram.
Fig. 2 is cylinder seal face leakage detection mounting structure schematic diagram.
The meaning marked in attached drawing is as follows：
1- two-position switch valves；The first filtering pressure reducing valves of 2-；3- reversing three-way valves；The first gas source pipes of 3a-；The second air sources of 3b-
Pipe；3c- third gas source pipes；Two five logical Pneumatic valves of 4-；4a- first row stomatas；The first ventholes of 4b-；4c- second row stomatas；
The second ventholes of 4d-；4e- air admission holes；5- cylinders；5a- pistons；5b- springs；The second filtering pressure reducing valves of 6-；7- spinner flowmeters；
8- valve bodies；9- spools；10- valve seats；11- flanged plates；12- air supply units.
Specific implementation mode
More specific detail is made to technical solution of the present invention with reference to embodiment：
Simple multifunctional operated pneumatic valve leak detection device of the present invention include air supply unit 12 and with the air supply unit
The first gas circuit and the second gas circuit of 12 connections；The two-position switch valve being sequentially arranged along airflow direction is installed in first gas circuit
1, the first filtering pressure reducing valve 2 and two five logical control valves 4 are equipped in second gas circuit and to be sequentially arranged along airflow direction
Second filtering pressure reducing valve 6 and micro spinner flowmeter 7.
It is equipped with and is connected to first gas circuit and for controlling institute between the two-position switch valve 1, the first filtering pressure reducing valve 2
The control gas circuit that two five logical control valves 4 carry out gas circuit switching is stated, the control gas circuit is equipped with reversing three-way valve 3.
Gas circuit switching principle is in described two five logical Pneumatic valves as shown in Figure 1：As the second gas source pipe 3b in control gas circuit
In have gas by when, air admission hole 4e and the first venthole 4b connections, second row stomata 4c and the second venthole 4d connections；Work as control
In gas circuit in the second gas source pipe 3b without gas by when, air admission hole 4e and the second venthole 4d connections, first row stomata 4a and first
Venthole 4d connections.
Leakage inspection method based on the simple multifunctional operated pneumatic valve leak detection device include valve body sealing surface leakage detection and
Cylinder seal face leakage detection；
Steps are as follows for the valve body sealing surface leakage detection, is illustrated in conjunction with Fig. 1：
Step 1, the air inlet of cylinder 5 in the first venthole 4b of described two five logical control valves 4 and operated pneumatic valve is connected
Logical, the second venthole 4d of described two five logical control valves 4 is connected to the gas outlet of cylinder in operated pneumatic valve 5, second gas
Way outlet end is communicated with 8 import of valve body of operated pneumatic valve, in the present embodiment 8 import of valve body sealed by flanged plate 11, described
Two gas circuit outlet ends connect with the import on flanged plate 11 and realize and communicated with 8 import of valve body；
Step 2, two-position switch valve 1 is opened, 2 pressure show value of the first filtering pressure reducing valve to cylinder is adjusted and drives rated pressure
To realize that 5 inner carrier 5a of cylinder is moved and kept valve in the completely closed state, while by the second filtering pressure reducing valve 6 and rotor
7 aperture regulation of flowmeter is to maximum；
Step 3, after pressure stability in second gas circuit, the spinner flowmeter 7 is observed, if the spinner flowmeter
7 show values are zero, then illustrate the valve body sealing surface No leakage, otherwise illustrate that the valve body sealing surface has leakage；
In order to ensure the accuracy of the valve body sealing surface leakage detection, the valve body sealing surface leakage detection step repeats more
Secondary, the valve body sealing surface leakage detection step is controlled by switching two five logical control valves 4 in gas circuit before repeating every time
Reversing three-way valve 3 is to realize that 5 inner carrier 5a of cylinder is moved back and forth, so that piston 5a band movable valve plugs 9 move back and forth, spool 9 is transported
Will produce the air-flow purged to 10 sealing surface of valve seat when dynamic, it is ensured that 10 sealing surface free from admixture of valve seat and realize spool 9 and valve
The close contact of 10 sealing surfaces of seat.
Steps are as follows for cylinder seal face leakage detection, is illustrated in conjunction with Fig. 2：
Step 1, second gas circuit outlet end is connected to the air inlet of cylinder in operated pneumatic valve 5；
Step 2, by 7 aperture regulation of spinner flowmeter to maximum, and it is aobvious slowly to adjust 6 pressure of the second filtering pressure reducing valve
Indicating value (pressure value be less than or equal to the cylinder drive rated pressure) is moved with to realize 5 inner carrier 5a of cylinder and is made at valve
In setting aperture, then stops adjusting second filtering pressure reducing valve 6 and observe the spinner flowmeter 7, if the rotor stream
7 show value of gauge is zero, then illustrates cylinder 5 and piston 5a sealing surface No leakages, otherwise illustrates that cylinder 5 is deposited with piston 5a sealing surfaces
It is leaking；
Step 3, above step 1, step 2 are repeated so that valve is in multiple apertures, and determines in each aperture lower cylinder
The leak case of sealing surface.I.e. the present invention can carry out leakage detection within the scope of piston stroke to cylinder seal face.
Claims (5)
1. a kind of simple multifunctional operated pneumatic valve leak detection device, it is characterised in that：Including air supply unit (12) and with the confession
The first gas circuit and the second gas circuit of gas unit (12) connection；Two be sequentially arranged along airflow direction are installed in first gas circuit
Bit switch valve (1), the first filtering pressure reducing valve (2) and two five logical control valves (4) are equipped with along air-flow in second gas circuit
The second filtering pressure reducing valve (6) and spinner flowmeter (7) that direction is sequentially arranged.
2. simple multifunctional operated pneumatic valve leak detection device as described in claim 1, it is characterised in that：The two-position switch valve
(1), it is equipped with and is connected to first gas circuit and for controlling described two five logical control valves between the first filtering pressure reducing valve (2)
(4) the control gas circuit of gas circuit switching is carried out, the control gas circuit is equipped with the commutation three whether ventilated for switching control gas circuit
Port valve (3).
3. simple multifunctional operated pneumatic valve leak detection device as described in claim 1, it is characterised in that：When valve body sealing surface leakage detection
When, the first venthole (4b) of described two five logical control valves (4) is connected to the air inlet of cylinder in operated pneumatic valve (5), described
The second venthole (4d) of two five logical control valves (4) is connected to the gas outlet of cylinder in operated pneumatic valve (5), second gas circuit
Outlet end is communicated with valve body (8) import of operated pneumatic valve；When cylinder seal face leakage detection, second gas circuit outlet end with it is pneumatic
The air inlet connection of cylinder (5) in valve.
4. a kind of leakage inspection method based on simple multifunctional operated pneumatic valve leak detection device as claimed in claim 1 or 2, feature exist
In：Including valve body sealing surface leakage detection and cylinder seal face leakage detection；
Steps are as follows for the valve body sealing surface leakage detection：
Step 1, by the air inlet of cylinder (5) in the first venthole (4b) of described two five logical control valves (4) and operated pneumatic valve
Connection, the second venthole (4d) of described two five logical control valves (4) are connected to the gas outlet of cylinder in operated pneumatic valve (5), institute
The second gas circuit outlet end is stated to communicate with valve body (8) import of operated pneumatic valve；
Step 2, two-position switch valve (1) is opened, the first filtering pressure reducing valve (2) pressure show value to cylinder is adjusted and drives rated pressure
With realize cylinder (5) inner carrier (5a) move and keep valve in the completely closed state, while by the second filtering pressure reducing valve (6) with
And spinner flowmeter (7) aperture regulation is to maximum；
Step 3, after pressure stability in second gas circuit, the spinner flowmeter (7) is observed, if the spinner flowmeter
(7) show value is zero, then illustrates the valve body sealing surface No leakage, otherwise illustrates that the valve body sealing surface has leakage；
Steps are as follows for cylinder seal face leakage detection：
Step 1, second gas circuit outlet end is connected to the air inlet of cylinder in operated pneumatic valve (5)；
Step 2, by spinner flowmeter (7) aperture regulation to maximum, and it is aobvious slowly to adjust the second filtering pressure reducing valve (6) pressure
Then indicating value stops adjusting described second and filters to realize cylinder (5) inner carrier (5a) movement and valve is made to be in setting aperture
Pressure reducing valve (6) simultaneously observes the spinner flowmeter (7), if the spinner flowmeter (7) show value is zero, illustrates cylinder (5)
With piston (5a) sealing surface No leakage, otherwise illustrates that cylinder (5) exists with piston (5a) sealing surface and leak；
Step 3, above step 1, step 2 are repeated so that valve is in multiple apertures, and determines and sealed in each aperture lower cylinder
The leak case in face.
5. the leakage inspection method of simple multifunctional operated pneumatic valve leak detection device as claimed in claim 4, it is characterised in that：The valve
Body sealing surface leakage detection step repeats repeatedly, passes through switching described two before each repetition of the valve body sealing surface leakage detection step
Reversing three-way valve (3) in five logical control valve (4) control gas circuit of position is to realize that cylinder (5) inner carrier (5a) moves back and forth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810750178.6A CN108775992B (en) | 2018-07-10 | 2018-07-10 | Simple multifunctional pneumatic valve leakage detection device and leakage detection method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810750178.6A CN108775992B (en) | 2018-07-10 | 2018-07-10 | Simple multifunctional pneumatic valve leakage detection device and leakage detection method |
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| CN108775992A true CN108775992A (en) | 2018-11-09 |
| CN108775992B CN108775992B (en) | 2024-03-15 |
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| CN201810750178.6A Active CN108775992B (en) | 2018-07-10 | 2018-07-10 | Simple multifunctional pneumatic valve leakage detection device and leakage detection method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111811754A (en) * | 2020-06-28 | 2020-10-23 | 福建福清核电有限公司 | Air chamber tightness testing process for pneumatic piston type regulating valve |
| CN112268654A (en) * | 2020-10-19 | 2021-01-26 | 浙江工业大学 | Method for testing and calibrating stress of pneumatic valve |
| CN113252253A (en) * | 2021-06-24 | 2021-08-13 | 福建慧芯激光科技有限公司 | Pneumatic valve leak detection device |
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| CN205918563U (en) * | 2016-07-28 | 2017-02-01 | 苏州寿力气体设备有限公司 | Intake valve |
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| CN208568203U (en) * | 2018-07-10 | 2019-03-01 | 安徽六国化工股份有限公司 | A kind of simple multifunctional operated pneumatic valve leak detection device |
-
2018
- 2018-07-10 CN CN201810750178.6A patent/CN108775992B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002139400A (en) * | 2000-10-31 | 2002-05-17 | Ricoh Elemex Corp | Air leakage detector and air leakage detecting method for air cylinder |
| CN102927351A (en) * | 2012-11-13 | 2013-02-13 | 济南大学 | Stepless regulation pneumatic control system for opening degree of water-sealing valve |
| CN104565504A (en) * | 2015-01-14 | 2015-04-29 | 江苏海事职业技术学院 | Pneumatic valve control mechanism |
| CN105372025A (en) * | 2015-11-27 | 2016-03-02 | 深圳市招科智控科技有限公司 | Gas tight test board of hydraulic valve |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111811754A (en) * | 2020-06-28 | 2020-10-23 | 福建福清核电有限公司 | Air chamber tightness testing process for pneumatic piston type regulating valve |
| CN112268654A (en) * | 2020-10-19 | 2021-01-26 | 浙江工业大学 | Method for testing and calibrating stress of pneumatic valve |
| CN113252253A (en) * | 2021-06-24 | 2021-08-13 | 福建慧芯激光科技有限公司 | Pneumatic valve leak detection device |
| CN113252253B (en) * | 2021-06-24 | 2024-02-09 | 福建慧芯激光科技有限公司 | Pneumatic valve leak hunting device |
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| CN108775992B (en) | 2024-03-15 |
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