CN110146233A - Gas leak detection apparatus - Google Patents
Gas leak detection apparatus Download PDFInfo
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- CN110146233A CN110146233A CN201910552783.7A CN201910552783A CN110146233A CN 110146233 A CN110146233 A CN 110146233A CN 201910552783 A CN201910552783 A CN 201910552783A CN 110146233 A CN110146233 A CN 110146233A
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- 239000001257 hydrogen Substances 0.000 claims description 8
- 229910052739 hydrogen Inorganic materials 0.000 claims description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims description 8
- 239000008246 gaseous mixture Substances 0.000 claims description 7
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- 238000009530 blood pressure measurement Methods 0.000 description 7
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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
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
- G01M3/22—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
- G01M3/221—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators for cables
-
- 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
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
- G01M3/22—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators
- G01M3/223—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material for pipes, cables or tubes; for pipe joints or seals; for valves; for welds; for containers, e.g. radiators for pipe joints or seals
-
- 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
- G01M3/2807—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 pipes
-
- 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
- G01M3/2853—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 pipe joints or seals
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention discloses a kind of gas leak detection apparatus, for detecting the leakage situation of Pneumatic pressure measuring device, it include: the storage cylinder being connected to the gas outlet of each pressure scanning valve of Pneumatic pressure measuring device, it is stored with high pressure detection gas in storage cylinder, and is provided with the valve for being connected and being truncated storage cylinder；It is set in the collector box of the pressure guiding pipe of Pneumatic pressure measuring device and the junction of air pressure acquisition part；The air-leakage detector of the leak rate of detection gas is connected to and is able to detect and show with the inner cavity of collector box；With the control system of pressure scanning valve communication connection, control system can control the opening and closing of each measurement port.It is arranged such, gas leak detection apparatus provided by the invention, the accurate detection that leak condition can not only be carried out with the junction of air pressure acquisition part to each pressure guiding pipe, can also measure leak rate and show, intuitively to learn whether the connection of pressure guiding pipe is qualified.
Description
Technical field
The present invention relates to aviation auxiliary products gas detection technology fields, are suitable for more specifically to one kind pneumatic
The gas leak detection apparatus of device for pressure measurement.
Background technique
Aero-engine is after the completion of with machine assembly, it is necessary to monitor its motion state by test run, examine its property
Whether can satisfy the criteria, could formally come into operation.Wherein Pneumatic pressure measurement is important a content of the test, is to aviation
The measurement of engine interior air-flow pressure.In the prior art, as shown in Figure 1, being used to carry out the Pneumatic pressure of Pneumatic pressure measurement
Measuring device, including stretching to multiple air pressure acquisition parts 1 of position and each air pressure acquisition part 1 inside aero-engine
It connects one to one and the pressure guiding pipe 2 being connected to, the pressure for connecting one to one and being connected to each pressure guiding pipe 2 by measurement port 5
Power scans valve 3 and acquires the computer 4 of 3 data information of pressure scanning valve.Each air pressure acquisition part 1 is provided with gas supply stream and enters
And the air cavity passed through, air cavity are connected to by fairlead 6 with the first end of pressure guiding pipe 2；Each pressure scanning valve 3 is provided with several
A measurement port 5 can measure any pressure range, and built-in newest microprocessor；The second end of each pressure guiding pipe 2
It connect and is connected to a measurement port 5, each measurement port 5 can measure pressure information and store calibration data, pressure
The information such as strength journey, factory calibration data and each calibration date set by user；Computer 4 can be to pressure scanning valve 3
Data information carries out automatic data acquisition and data analysis, so that experimenter checks.
After aero-engine starting, the air-flow that different location generates is entered each by the air cavity of each air pressure acquisition part 1
Pressure guiding pipe 2 then by with cause pipe 2 to connect one to one measurement port 5 enter pressure scanning valve 3 with each measurement end
The inner cavity that mouth is connected to.The EEPROM of pressure scanning valve 3 records the pressure information of each measurement port 5, then computer 4 into
The data operations such as row pressure value calibration and analysis of pressure changes, thus testing crew can learn it is right with each pressure acquisition part 1
Pressure inside the aero-engine answered at each position.
But pressure guiding pipe 2 is nylon tube, and the fairlead 6 that air pressure acquisition part 1 is connected with pressure guiding pipe 2 is stainless steel tube, two
A pipeline grafting and internal-and external diameter tolerance fit by two pipelines and outer cover compress solid steel ring to realize the sealing of interface, due to
The reasons such as the difference of material, artificial fault cause junction 7 serious flow leakage problem often occur, and by artificial
The connectivity of detection interface be difficult to before the ride test of aero-engine discovery interface whether gas leakage, and in on-test
Afterwards, due to air pressure acquisition part 1 and cause number up to hundreds and thousands of of pipe 2, air pressure measuring point is the four single surveys for dissipating distribution
Point, no reference pair ratio, if certain causes pipe 2, there are flow leakages, it is also difficult to judge, and it is a plurality of cause pipe 2 leakage can be to pneumatic
The measurement result of pressure causes biggish interference, seriously affects the reliability and measurement accuracy of the test result of aero-engine.
Therefore, how Pneumatic pressure measuring device accurately to be let out before aero-engine carries out ride test
Leak detection, to check whether the connection of each pressure guiding pipe qualified, guarantee Pneumatic pressure measuring device measurement result reliable and
Precision, the problem of becoming those skilled in the art's urgent need to resolve.
Summary of the invention
The purpose of the present invention is to provide a kind of gas leak detection apparatus, can be suitable for Pneumatic pressure measurement dress
Set, not only can the junction to each pressure guiding pipe and air pressure acquisition part carry out the accurate detection of leak condition, can also be to letting out
Leakage rate is measured and is shown, operator is allow intuitively to learn whether the connection of each pressure guiding pipe is qualified.
A kind of gas leak detection apparatus provided by the invention, for detecting the leakage situation of Pneumatic pressure measuring device,
The Pneumatic pressure measuring device include multiple air pressure acquisition parts, first end correspondingly with multiple air pressure acquisition parts
Multiple pressure guiding pipes that fairlead is connected, multiple pressure scanning valves, the pressure scanning valve includes second with the pressure guiding pipe
Hold the measurement port to connect one to one and the gas outlet that can be connected to and be truncated with multiple measurement ports, comprising:
The storage cylinder being connected to the gas outlet of each pressure scanning valve is stored with high pressure detection gas in the storage cylinder
Body, and it is provided with the valve connecting for being connected and being truncated the storage cylinder with the gas outlet；It is set in the pressure guiding pipe
With the collector box of the junction of the air pressure acquisition part, the collector box is provided with for accommodating the pressure guiding pipe and the air pressure
The inner cavity and the confession pressure guiding pipe and the fairlead respectively in communication with the inner cavity for acquiring the junction of the fairlead of part are stretched
Opening out；The gas leakage for the detection gas for being connected to and being able to detect that in the storage cylinder with the inner cavity of the collector box is examined
Instrument is surveyed, the air-leakage detector is able to detect and shows the leak rate of the detection gas；With the pressure scanning valve
The control system of communication connection, the control system can control the opening and closing of each measurement port.
Preferably, the control system and the air-leakage detector communicate to connect, and the set-up of control system has pre-
If value, received each leak rate and the preset value are compared and export comparing result by the control system.
Preferably, the opening of the collector box is provided with the gasket with the collector box integrally connected.
Preferably, the collector box is provided with the box cover of the opening of the box body with cavity and the sealing cavity, the box
Lid can be opened and closed to be connected to the box body.
Preferably, the valve of the storage cylinder is set as pressure-regulating valve.
It preferably, further include the valve opening and closing being electrically connected with the pressure-regulating valve, for controlling the pressure-regulating valve
Valve positioner.
Preferably, the outlet end of the pressure-regulating valve is provided with pressure sensor, the valve positioner and the pressure
Force snesor is electrically connected with the control system.
Preferably, the air-leakage detector is provided with vacuum pump and accommodates the chamber of the vacuum pump, the gas
The detecting element of leakage instrument is set in the chamber, and the chamber setting is there are two air inlet port and the collector box passes through one
A air inlet port and the chamber.
Preferably, the detection gas are set as helium, and the air-leakage detector is set as helium mass spectrometer leak detector；Or
, the detection gas are set as the gaseous mixture of helium and nitrogen, and the air-leakage detector is set as helium mass spectrometer leak detector.
Preferably, the detection gas are set as the gaseous mixture of hydrogen and nitrogen, and the air-leakage detector is set as
Hydrogen helium mass spectrometer leak detector.
In technical solution provided by the invention, gas leak detection apparatus, for detecting letting out for Pneumatic pressure measuring device
Leakage state and it is connected with Pneumatic pressure measuring device, the air cavity including the pressure scanning valve with Pneumatic pressure measuring device is connected
Logical storage cylinder, be set in Pneumatic pressure measuring device the junction for causing pipe and air pressure acquisition part collector box and gas collection
The air-leakage detector of the inner cavity connection of box and the control system communicated to connect with pressure scanning valve.
Wherein, high pressure detection gas are stored in storage cylinder, after the valve of storage cylinder is opened, detection gas can enter pressure
Power scans the inner cavity of valve being connected to each measurement port, then enters pressure guiding pipe by measurement port again, flows through pressure guiding pipe
With the junction of air pressure acquisition part；Collector box is provided with closed inner cavity, if the junction of pressure guiding pipe and air pressure acquisition part leaks,
Detection gas can enter the inner cavity of collector box, and detect leakage speed by the air-leakage detector that the inner cavity with collector box is connected to
Rate；Control system can control the opening and closing of each measurement port of pressure scanning valve, then may be implemented successively to open by control system
Each measurement port is closed, since pressure guiding pipe and measurement port connect one to one, each pressure guiding pipe can be sequentially turned on, and detect gas
Body can sequentially enter in each pressure guiding pipe, adopt to can detecte out each pressure guiding pipe by air-leakage detector with air pressure
Whether the junction of collection part leaks, and the gas leak rate of each junction can be shown by display screen, thus operator
Member can intuitively obtain leak rate whether within a preset range, the connection of each pressure guiding pipe whether He Ge result.
So set, gas leak detection apparatus provided by the invention, it is suitable for Pneumatic pressure measuring device, it not only can be with
The accurate detection of leak condition is carried out to the junction of each pressure guiding pipe and air pressure acquisition part, it can also leakage speed to pressure guiding pipe
Rate is measured and is shown, operator is allow intuitively to learn whether the connection of each pressure guiding pipe is qualified.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of Pneumatic pressure measuring device in the prior art；
Fig. 2 is the structural schematic diagram of gas leak detection apparatus in the embodiment of the present invention.
In Fig. 1-2:
Air pressure acquisition part -1, pressure guiding pipe -2, pressure scanning valve -3, storage cylinder -301, valve -302, valve positioner -
303, control system -401, measurement port -5, fairlead -6, junction -7, collector box -701, air-leakage detector -702,
Gas outlet -8.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, technical solution of the present invention will be carried out below
Detailed description.Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, those of ordinary skill in the art are obtained all without making creative work
Other embodiment belongs to the range that the present invention is protected.
Present embodiment is designed to provide a kind of gas leak detection apparatus, is suitable for Pneumatic pressure measurement dress
Set, not only can the junction to each pressure guiding pipe and air pressure acquisition part carry out the accurate detection of leak condition, can also be to letting out
Leakage rate is measured and is shown, operator is allow intuitively to learn whether the connection of each pressure guiding pipe is qualified.
Hereinafter, elaborating in conjunction with attached drawing to embodiment.In addition, embodiments illustrated below is not remembered claim
The content of the invention of load plays any restriction effect.In addition, the full content of composition represented by following example is not limited to conduct
Necessary to the solution of the invention described in the claims.
Please refer to attached drawing 1-2, a kind of gas leak detection apparatus provided in this embodiment, suitable for gas as shown in Figure 1
Whether dynamic pressure force measuring device, the connection state that can measure each pressure guiding pipe 2 of Pneumatic pressure measuring device are qualified.Such as Fig. 1
Or shown in Fig. 2, which is provided with multiple air pressure acquisition parts 1 and the one-to-one impulse of air pressure acquisition part 1
Pipe 2 and the pressure scanning valve 3 being connect with each pressure guiding pipe 2.Pressure scanning valve 3 is provided with several and corresponds with pressure guiding pipe 2
Each measurement port 5 of the measurement port 5 of connection, pressure scanning valve 3 is connected to the air cavity of the pressure scanning valve 3.The air cavity
It is provided with gas outlet 8.In practical applications, the item number of pressure guiding pipe 2 is hundreds and thousands of, then needs multiple pressure scanning valves 3, each pressure
Power scanning valve 3 can by connected with gas-guide tube each adjacent two pressure scanning valve 3 gas outlet 8 or a respective measurement end
Mouth 5 interconnects to realize.As shown in Figure 1, gas outlet 8 can also be exactly a measurement port 5 of pressure scanning valve 3.
As shown in Fig. 2, gas leak detection apparatus provided in this embodiment includes the pressure with Pneumatic pressure measuring device
Storage cylinder 301 that the gas outlet 8 of scanning valve 3 is connected has and closed inner cavity and is set in pressure guiding pipe 2 and air pressure acquisition part 1
The collector box 701 of junction 7, the air-leakage detector 702 that is connected to the inner cavity of collector box 701 and with pressure scanning valve 3
The control system 401 of communication connection.
Wherein, high pressure detection gas are stored in storage cylinder 301, and storage cylinder 301 is provided with can be connected or be truncated inspection
Survey the valve 302 of gas circulation status.After the valve 302 of storage cylinder 301 is opened, detection gas can pass through pressure scanning valve 3
Gas outlet 8 enter in the air cavity that is connected to each measurement port 5, pressure guiding pipe 2, stream are then entered by measurement port 5 again
Junction 7 through pressure guiding pipe 2 Yu air pressure acquisition part 1.Collector box 701 is provided with the connection for accommodating pressure guiding pipe 2 and air pressure acquisition part 1
The closed inner cavity at place 7；Air-leakage detector 702 has the detecting element, vacuum pump and appearance that can sense detection gas
Receive the chamber of vacuum pump, detecting element is located in the chamber, is connected to the inner cavity of the chamber Yu collector box 701, can by vacuum pump
Extracting the inner cavity of collector box 701 for vacuum area or negative pressuren zone.If the junction 7 of pressure guiding pipe 2 and air pressure acquisition part 1 exists and lets out
Leakage, detection gas can enter the inner cavity of collector box 701 from leakage point and then enter in chamber, can be by air-leakage detector
702 detecting element is perceived.
And control system 401 can control the opening and closing of each measurement port 5 of pressure scanning valve 3, then pass through control system 401
It may be implemented successively to be opened and closed each measurement port 5 or be successively opened and closed each measurement port 5 of each pressure scanning valve 3, per this
The time of opening and closing is adjustable and controls.When being successively opened and closed each measurement port 5, since pressure guiding pipe 2 and measurement port 5 one are a pair of
It should connect, each pressure guiding pipe 2 can sequentially turn on, and detection gas can sequentially enter in each pressure guiding pipe 2, set opening/closing time
The turn-on time of i.e. each pressure guiding pipe 2, the stable junction 7 for flowing through pressure guiding pipe 2 Yu air pressure acquisition part 1 of gas to be detected lead to
It crosses air-leakage detector 702 and can detecte out the junction 7 of each pressure guiding pipe 2 and air pressure acquisition part 1 and whether leak, and show
The gas leak rate of each junction 7 out；All measurement ports 5 of each pressure scanning valve 3 are successively opened and closed, are swept with pressure
Retouching valve 3 is unit, is grouped detection, if there is no problem for group detection, can directly carry out next group of detection, if the group is examined
Existing gas leakage situation is measured, then all measurement ports 5 of the group are carried out sequentially turning on detection, specifically which impulse checked
There are leakage situations for pipe 2.To which operator can check each pressure guiding pipe 2 by the display screen of air-leakage detector 702
With the presence or absence of the leak rate for leaking and learning the pressure guiding pipe 2 in the presence of leakage, by by the leakage of each leak rate and standard
Rate value compares, and can quickly, intuitively learn whether the connection of pressure guiding pipe 2 is qualified.
So set, gas leak detection apparatus provided in this embodiment, is suitable for Pneumatic pressure measuring device, utilizes gas
The architectural characteristic of the pressure scanning valve 3 of dynamic pressure force measuring device, not only can be to the company of each pressure guiding pipe 2 and air pressure acquisition part 1
The accurate detection that place 7 carries out leak condition is connect, the leak rate of pressure guiding pipe 2 can also be measured and be shown, so as to
Intuitively learn whether the connection of each pressure guiding pipe 2 is qualified；And entire detection process realizes automatic control, determines impulse automatically
Whether the connection of pipe 2 is qualified, and artificial maloperation is avoided to influence testing result.
Further, control system 401 can also be communicated to connect with air-leakage detector 702, and control system 401 can
The data information that air-leakage detector 702 records is acquired in real time, is carried out each data and preset leak rate
Comparison, and export each leak rate whether comparing result within a preset range, so that operator is learnt each item automatically
Whether the connection of pressure guiding pipe 2 is qualified, and the leak rate and comparing result of measurement can directly be the survey of Pneumatic pressure measuring device
It measures result and data foundation is provided, learn leak rate value for testing crew and its to the pressure measurement in Pneumatic pressure measurement test
Value produces much influences.
Control system 401 has the execution module of each opening and closing of measurement port 5 of command reception module, control, real-time reception
The data information of air-leakage detector 702 and the data processing that the information and preset value are compared, exported comparing result
Module.Control system 401 can use programmable data acquisition software or programmable PLC.Each measurement of pressure scanning valve 3
Port 5 is operated pneumatic valve, includes solenoid valve and Pneumatic valve actuator.The pressure of detection gas itself can be opened pneumatically
Valve actuator, then control system 401 can control each by the on-off of control solenoid valve and the valve 302 of storage cylinder 301
The opening and closing of measurement port 5.
Specifically, collector box 701 is provided with the box body with cavity and can close the box cover of the opening of the cavity, box cover with
Box body can be opened and closed to connect.Box cover and box body closure can form the closed inner cavity of collector box 701, can be with when box cover is opened
The junction 7 of pressure guiding pipe 2 and the fairlead 6 of air pressure acquisition part 1 is put into inner cavity, pressure guiding pipe 2 and fairlead 6 pass through collector box
Opening on 701 is stretched out respectively, and opening be provided with sealing element with sealed opening, avoid damage to closed inner cavity.Sealing element
It can be the gasket connecting with 701 integral type of collector box, not only guarantee sealing effect, but also can prevent gasket from falling.
To gas storage when the pressure of detection gas in storage cylinder 301 can be by storing detection gas into storage cylinder 301
Gas in bottle 301 carries out compression realization；The valve 302 of storage cylinder 301 can be set on 301 body of storage cylinder or set
It sets on the pipeline of connection storage cylinder 301 and pressure scanning valve 3.Storage cylinder 301 can be set to and all 3 phases of pressure scanning valve
One of connection, be also possible to be connected to several pressure scanning valves 3 respectively it is multiple, it is specific depending on actual conditions.
And the valve 302 of storage cylinder 301 may be arranged as pressure-regulating valve, to guarantee to be passed through the inspection of pressure scanning valve 3
Surveying gas has preset positive pressure value.The valve opening and closing of pressure-regulating valve can carry out artificial adjust by operator and set
It can also remotely be controlled by connecting valve controller 303, provide and operate conveniently for operator.Further, may be used also
Pressure sensor is arranged in the outlet end of pressure-regulating valve, and control system by pressure sensor and valve positioner 303
401 electrical connections, then control system 401 can adjust the outlet of pressure-regulating valve in real time according to the pressure value that pressure sensor detects
The output pressure at end simultaneously cooperates with valve positioner 303, when being detected, valve positioner 303 is made to open pressure
The outlet valve of force regulating valve closes the valve of pressure-regulating valve when not needing to be detected.
In the prior art, the chamber of the receiving vacuum pump of air-leakage detector 702 is provided with an air inlet port, should be into
Gas port is connected with suction gun, and suction gun can be held for operator, and the opening of suction gun can be used as air-leakage detector 702
Detection port.Then the inner cavity of collector box 701 can pass through the opening and chamber of suction gun；Can also directly it connect with chamber
It is logical, if chamber setting is there are two air inlet port, one be connected to the inner cavity of collector box 701, another connect suction gun, so set
It sets, air-leakage detector 702 removes outside this detection port of collector box 701, is also equipped with this detection port of suction gun, can be right
Other junctions of Pneumatic pressure measuring device carry out leak detection such as the junction of pressure guiding pipe 2 and measurement port 5.
Specifically, detection gas can be the gaseous mixture of helium or helium and nitrogen or the gaseous mixture of hydrogen and nitrogen,
Correspondingly, air-leakage detector 702 can be set to helium mass spectrometer leak detector or hydrogen helium mass spectrometer leak detector.Nitrogen and helium two
The chemical property torpescence of person, hydrogen are mixed with nitrogen, the chemical property of gaseous mixture also torpescence, under usual state not with it is other
Element or compound combine, and hydrogen is easy to detect with helium, then three is as detection gas, safety with higher and reality
The property used.
It is understood that same or similar part can mutually refer in the various embodiments described above, in some embodiments
Unspecified content may refer to the same or similar content in other embodiments.Multiple schemes provided by the invention include
The basic scheme of itself does not condition each other independently of each other, but it can also be combined with each other in the absence of conflict, reach
It is realized jointly to multiple effects.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (10)
1. a kind of gas leak detection apparatus, for detecting the leakage situation of Pneumatic pressure measuring device, the Pneumatic pressure is surveyed
Measuring device includes the fairlead of multiple air pressure acquisition parts (1), first end correspondingly with multiple air pressure acquisition parts (1)
(6) the multiple pressure guiding pipes (2) and multiple pressure scanning valves (3) being connected, the pressure scanning valve (3) include and the pressure guiding pipe
(2) measurement port (5) that second end connects one to one and what can be connected to and be truncated with multiple measurement ports (5) go out
Port (8) characterized by comprising
The storage cylinder (301) being connected to the gas outlet (8) of each pressure scanning valve (3), the interior storage of the storage cylinder (301)
There are high pressure detection gas, and is provided with the valve connecting for being connected and being truncated the storage cylinder with the gas outlet (8)
(302)；
It is set in the collector box (701) of the junction (7) of the pressure guiding pipe (2) and the air pressure acquisition part (1), the collector box
(701) it is provided with the inner cavity of the junction of the fairlead (6) for accommodating the pressure guiding pipe (2) and the air pressure acquisition part (1)
And the opening in communication with the inner cavity stretched out respectively for the pressure guiding pipe (2) and the fairlead (6)；
The gas of detection gas for being connected to and being able to detect that in the storage cylinder (301) with the inner cavity of the collector box (701)
Leakage detector (702), the air-leakage detector (702) are able to detect and show the leak rate of the detection gas；
With the control system (401) of the pressure scanning valve (3), the control system (401) can control each measurement
The opening and closing of port (5).
2. gas leak detection apparatus as described in claim 1, the control system (401) and the air-leakage detector
(702) it communicates to connect, the control system (401) is provided with preset value, and the control system (401) will be received each described
Leak rate and the preset value compare and export comparing result.
3. gas leak detection apparatus as described in claim 1, which is characterized in that the opening of the collector box (701) is equal
It is provided with the gasket with the collector box (701) integrally connected.
4. gas leak detection apparatus as described in claim 1, which is characterized in that the collector box (701) is provided with recessed
The box cover of the opening of the box body and sealing cavity of chamber, the box cover can be opened and closed to be connected to the box body.
5. gas leak detection apparatus as described in claim 1, which is characterized in that the valve (302) of the storage cylinder (301)
It is set as pressure-regulating valve.
6. gas leak detection apparatus as claimed in claim 5, which is characterized in that further include being electrically connected with the pressure-regulating valve
It connects, the valve positioner (303) of valve opening and closing for controlling the pressure-regulating valve.
7. gas leak detection apparatus as claimed in claim 6, which is characterized in that the outlet end of the pressure-regulating valve is arranged
There is pressure sensor, the valve positioner (303) and the pressure sensor are electrically connected with the control system (401).
8. gas leak detection apparatus as described in claim 1, which is characterized in that the air-leakage detector (702) sets
It is equipped with vacuum pump and accommodates the chamber of the vacuum pump, the detecting element of the gas leakage instrument (702) is set to the chamber
Interior, the chamber setting is there are two air inlet port and the collector box (701) passes through an air inlet port and the chamber
Connection.
9. gas leak detection apparatus as described in claim 1, which is characterized in that the detection gas are set as helium, institute
It states air-leakage detector (702) and is set as helium mass spectrometer leak detector；
Alternatively, the detection gas are set as the gaseous mixture of helium and nitrogen, the air-leakage detector (702) is set as helium
Mass-spectrometer leak detector.
10. gas leak detection apparatus as described in claim 1, which is characterized in that the detection gas be set as hydrogen with
The gaseous mixture of nitrogen, the air-leakage detector (702) are set as hydrogen helium mass spectrometer leak detector.
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| CN201910552783.7A CN110146233A (en) | 2019-06-25 | 2019-06-25 | Gas leak detection apparatus |
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| CN201910552783.7A CN110146233A (en) | 2019-06-25 | 2019-06-25 | Gas leak detection apparatus |
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