CN116105078B - Testing device and testing method for ultralow-pressure gas leakage detection agent - Google Patents
Testing device and testing method for ultralow-pressure gas leakage detection agent Download PDFInfo
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- CN116105078B CN116105078B CN202310309040.3A CN202310309040A CN116105078B CN 116105078 B CN116105078 B CN 116105078B CN 202310309040 A CN202310309040 A CN 202310309040A CN 116105078 B CN116105078 B CN 116105078B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
- F17D1/04—Pipe-line systems for gases or vapours for distribution of gas
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
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Abstract
The invention relates to the technical field of gas leakage detection devices, and provides a testing device for an ultralow-pressure gas leakage detection agent. The back pressure piece with leak between the module subassembly and be connected with the tee bend, the tee bend still is connected with electron micropressure meter, still includes first stop valve, first stop valve is connected the tee bend with leak between the module subassembly, the second stop valve sets up the tee bend with between the electron micropressure meter. A method for testing the ultra-low pressure gas leakage detection agent is also provided. Through the technical scheme, the technical problem that the ultra-low pressure gas leakage detection device which is not suitable in the related technology can continuously and stably manufacture the ultra-low pressure venting pressure to be used for the ultra-low pressure gas leakage agent test research is solved.
Description
Technical Field
The invention relates to the technical field of gas leakage detection devices, in particular to an ultralow-pressure gas leakage detection device.
Background
Whether the natural gas pipeline leaks gas or not can be detected by adopting a pumping type combustible gas detector or a bubble method or a gas membrane method according to the use scene and the requirement, and helium detection cannot be generally used. The detection by the bubble method or the detection by the gas membrane method needs to detect whether natural gas leakage occurs in the natural gas pipeline by a leakage detection agent, for example, by covering the leakage detection agent on the natural gas pipeline. The bubble method detection, also called as foam coverage method, is usually to spray a leakage agent at the flange connection position and the valve position of the natural gas pipeline for detection, and determine whether gas leakage exists according to whether the leakage agent is sprayed to the flange connection position and the valve position of the pipeline to generate foam.
According to different use scenes, the leakage detection agents can be divided into common gas leakage detection agents and ultra-low pressure gas leakage detection agents, and the ultra-low pressure gas leakage detection agents are one difficulty in the current gas leakage detection research, because most of the gas leakage detection agents cannot foam under the ultra-low pressure condition, and the purpose of gas leakage detection can be achieved only by designing the targeted gas leakage detection agents. A large number of experiments are required for developing an ultra-low pressure gas leakage detecting agent which is suitable for the ultra-low gas pressure of about 230Pa and can also perform gas leakage detection. The research of the ultra-low pressure gas leakage detecting agent needs corresponding research equipment, so that equipment for continuously generating the ultra-low gas pressure of about 230Pa is required to be designed, and the performance test of the designed gas leakage detecting agent is convenient for technicians.
In the gas leakage detection, the required pressure is an opening pressure, that is, the generated ultra-low pressure is an ultra-low pressure to the atmosphere, and therefore, the opening pressure having a steady pressure value of about 230Pa needs to be generated by the apparatus. In the prior art, although related devices can generate ultra-low pressure through the precise valves, the outlets of the precise valves must be connected with a workpiece to control, such as connecting with a high-precision cylinder to control the high-precision cylinder, and the like, but the precise valves cannot be directly used for ultra-low pressure gas leakage detection, because the outlets of the precise valves cannot be directly opened to the atmosphere, otherwise, the outlets of the precise valves cannot be kept under pressure, so that the precise valves are in a "normally open state" and cannot be controlled. When the test research of ultra-low pressure gas leakage detection is carried out, on one hand, a technician does not know how to continuously and stably generate the ultra-low pressure open pressure of 230Pa, the air pressure is small and is lower than the air pressure equivalent to human expiration, on the other hand, the ultra-low pressure of 230Pa needs to be the open pressure, namely the air pressure, so as to meet the requirement of continuously carrying out the foam coverage test of an open pressure detection point, the aim is to test the performance of a gas leakage agent, however, when the foam coverage mode carries out the gas leakage detection of a detection position, the detection position cannot be completely sealed as a gas film, so that the detection position always has the foam leakage, the gas leakage process can lead the outlet of a precision valve to be in a 'normally open state' because the pressure is not maintained, the ultra-low pressure output of 230Pa is not provided any more, and the gas leakage detection is carried out on site, so that the research of the ultra-low pressure gas leakage detection agent is still caused to a certain extent. Therefore, it is necessary to design an ultra-low pressure gas leakage generating device capable of generating an opening pressure so as to realize an experimental development stage and conveniently perform a performance test of ultra-low pressure gas leakage in the experiment.
Disclosure of Invention
The invention provides an ultralow pressure gas leakage detection device, which solves the technical problem that no proper ultralow pressure gas leakage detection device in the related art can continuously and stably manufacture the ultralow pressure venting pressure for the experimental research of an ultralow pressure gas leakage agent.
The technical scheme of the invention is as follows:
the utility model provides an ultralow pressure gas leakage detection device, includes air supply, air supply relief pressure valve, accurate pressure regulating subassembly, the leakage module subassembly that connects gradually, wherein, accurate pressure regulating subassembly is including accurate air-vent valve, the backpressure spare that connects gradually.
As a further technical proposal, a tee joint is connected between the back pressure piece and the leakage module assembly, and the tee joint is also connected with an electronic micro-manometer and also comprises
A first shut-off valve connected between the tee and the leakage module assembly,
and the second stop valve is arranged between the tee joint and the electronic micro-pressure meter.
As a further technical scheme, the precise pressure regulating assembly further comprises
A bypass line connected in parallel with the precise pressure regulating valve and the back pressure piece,
a third shut-off valve provided on the bypass line,
the fourth stop valve and the fifth stop valve are connected in series with the precise pressure regulating valve and are respectively positioned at two sides of the precise pressure regulating valve, and the fourth stop valve and the fifth stop valve are connected in parallel with the third stop valve.
As a further technical scheme, the precise pressure regulating valve is an electric proportional valve and further comprises
A mechanical pressure reducing valve connected between the air source pressure reducing valve and the precise pressure regulating assembly,
a mechanical micro-pressure gauge connected to the mechanical pressure reducing valve,
a signal amplifier connected to the precise pressure regulating valve,
the front-end gas filter is connected between the gas source pressure reducing valve and the mechanical pressure reducing valve.
As a further technical scheme, the back pressing piece is a titanium sintering piece and comprises a plurality of titanium sintering layers which are arranged at intervals.
As a further aspect, the leakage module assembly includes a microporous member, and the outlet end of the back pressure member opens into the microporous member.
As a further technical solution, the leakage module assembly further comprises
The seat body is provided with a first connecting channel, a second connecting channel, a third channel and a fourth channel which are circumferentially arranged, the outlet of the back pressing piece is communicated with the first connecting channel,
the rotating piece is rotationally arranged on the seat body, the microporous piece is provided with an inlet, the microporous pieces are arranged on the rotating piece in four circles, after each microporous piece follows the rotating piece to rotate, the inlet of the microporous piece is sequentially communicated with the first connecting channel, the second connecting channel, the third channel and the fourth channel,
a rotation driving member which drives the rotation member to rotate,
the water spraying device is communicated with the second communicating channel,
an air injection device, which is communicated with the third channel,
and the hot air device is communicated with the fourth channel.
As a further technical scheme, the seat body is provided with a first fitting blocking surface, the rotating piece is provided with a second fitting blocking surface, and the first fitting blocking surface and the second fitting blocking surface are tightly attached to slide.
As a further technical scheme, the rotation shaft of the rotation piece is horizontal, and the leakage module assembly further comprises
And the soaking tank is positioned below the rotating driving piece, and is immersed by the soaking tank when the microporous piece rotates to the bottommost end along with the rotating piece.
As a further technical scheme, the micropore piece is a sintered muffler.
The invention also provides an ultralow pressure gas leakage detection method, and the ultralow pressure gas leakage detection device is used for detecting the gas leakage detection agent.
The working principle and the beneficial effects of the invention are as follows:
in the invention, an air source is designed to provide air pressure, the air source can be an air bottle, the air pressure is reduced to the acceptable pressure input range of the precise pressure regulating valve of the precise pressure regulating assembly after being connected with the air source pressure reducing valve, and finally the pressure is led to the atmosphere through the leakage module assembly, and the air discharging position is the testing position of the leakage detecting agent. After the pressure is regulated by the precise pressure regulating valve, the pressure can be reduced to the required detection pressure, for example, the 230Pa leakage module assembly is vented, the pressure is the relative pressure with the atmosphere, namely the pressure higher than the atmospheric pressure, in order to realize the pressure maintenance of the 230Pa relative pressure, the outlet of the precise pressure regulating valve is prevented from being in a 'normally open state' caused by the subsequent venting, the back pressure piece is specially designed to be connected with the precise pressure regulating valve, so that the leakage module assembly which is subsequently connected with the precise pressure regulating valve is even vented, but due to the blocking of the back pressure piece, the outlet of the precise pressure regulating valve can also have certain pressure, the continuous stable output of the 230Pa relative pressure of the precise pressure regulating valve is possible, the normally open state of the precise pressure regulating valve is avoided, the set 230Pa venting pressure can be continuously output by the leakage module assembly, the technical problem which cannot be solved all the time is solved, and the stable venting pressure with the output of hundreds of Pa pressure is reached.
Drawings
The invention will be described in further detail with reference to the drawings and the detailed description.
FIG. 1 is a schematic diagram of the structure of an embodiment 1 of the present invention;
FIG. 2 is a schematic view of a leakage module assembly according to embodiment 2 of the present invention;
FIG. 3 is a schematic view of a leakage module assembly according to another embodiment 2 of the present invention;
in the figure: the device comprises an air source-1, an air source pressure reducing valve-2, a precision pressure regulating assembly-3, a precision pressure regulating valve-301, a back pressure piece-302, a titanium sintered layer-3021, a bypass pipeline-303, a third stop valve-304, a fourth stop valve-305, a fifth stop valve-306, a leakage module assembly-4, a micropore piece-401, an inlet-4011, a seat body-402, a first attaching baffle-4021, a first connecting channel-403, a second connecting channel-404, a third channel-405, a fourth channel-406, a rotating piece-407, a second attaching baffle-4071, a rotating driving piece-408, a soaking tank-409, a tee joint-5, an electronic micro-manometer-6, a first stop valve-7, a second stop valve-8, a mechanical pressure reducing valve-9, a mechanical micro-manometer-10, a signal amplifier-11 and a front air filter-12.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
As shown in fig. 1, this embodiment provides an ultra-low pressure gas leakage detection device, which includes a gas source 1, a gas source pressure reducing valve 2, a precision pressure regulating assembly 3, and a leakage module assembly 4 that are sequentially connected, wherein the precision pressure regulating assembly 3 includes a precision pressure regulating valve 301 and a back pressure member 302 that are sequentially connected.
In this embodiment, considering that the prior art does not have an ultra-low pressure generating device, the gas leakage detecting device in the prior art cannot continuously generate an ultra-low pressure which is an open pressure, that is, cannot generate an empty ultra-low pressure, although the pressure range of the precise pressure regulating valve in the prior art may be 0-600 pa, but the pressure range of 0-600 pa is not an open pressure, and the output port of the precise pressure regulating valve must be connected with a working device and cannot be empty, for example, the precise pressure regulating valve can be connected with a precise cylinder to control the precise cylinder. If the outlet of the precise pressure regulating valve is designed to be empty, the precise pressure regulating valve is in a normally open state quickly, and the reason that the outlet pressure is smaller than the set pressure and is required to be continuously complemented is that the precise pressure regulating valve is in the normally open state, and the precise pressure regulating valve is in the normally open state and has only two working states, namely an open circuit or a broken circuit, and only an adjustable output range of 0-600 Pa. In this embodiment, in order to realize the output of the vented ultra-low pressure, the air source 1 is designed to provide air pressure, the air source 1 may be an air bottle, the air pressure is reduced to the pressure input range acceptable by the precise pressure regulating valve 301 of the precise pressure regulating assembly 3 after being connected with the air source pressure reducing valve 2, and finally the pressure is led to the atmosphere through the leakage module assembly 4, and the venting position is the testing position of the leakage detecting agent. After the pressure of the precise pressure regulating valve 301 is regulated, the pressure can be reduced to a required detection pressure, for example, the 230Pa leakage module assembly is vented, the pressure is the relative pressure with the atmosphere, namely the pressure higher than the atmospheric pressure, in order to keep the pressure of 230Pa relative pressure, the outlet of the precise pressure regulating valve 301 is prevented from being in a "normally open state" due to subsequent venting, the back pressure piece 302 is specially designed to be connected with the precise pressure regulating valve 301, so that the leakage module assembly 4 connected with the precise pressure regulating valve 301 subsequently is vented, but due to the blocking of the back pressure piece 302, a certain pressure can exist at the outlet of the precise pressure regulating valve 301, so that the possibility of continuously and stably outputting 230Pa relative pressure of the precise pressure regulating valve 301 is realized, the problem that the precise pressure regulating valve 301 is in the "normally open state" is avoided, the leakage module assembly 4 can continuously output the set venting pressure of 230Pa is solved, and the technical problem which cannot be solved all the time is solved, and the stable venting pressure of several hundred pascals is achieved.
Further, a tee joint 5 is connected between the back pressure piece 302 and the leakage module assembly 4, the tee joint 5 is further connected with an electronic micro-pressure meter 6, the electronic micro-pressure meter further comprises a first stop valve 7, the first stop valve 7 is connected between the tee joint 5 and the leakage module assembly 4, and a second stop valve 8 is arranged between the tee joint 5 and the electronic micro-pressure meter 6.
In this embodiment, in order to ensure that the pressure output by the back pressure member 302 connected after the precise pressure regulating valve 301 is stable enough, an instant detection device is specially designed, that is, an electronic micro-pressure meter 6 is connected after the back pressure member 302, and the electronic micro-pressure meter 6 is used to determine whether the pressure output after the back pressure member 302 is stable at a set pressure value of 230Pa, so as to ensure the accuracy of the test detection of the gas leakage detection agent, meanwhile, when the pressure of 230Pa is very small, the pressure delivered to the leakage module assembly 4 is extremely easy to influence during the measurement of the electronic micro-pressure meter 6, and therefore, a tee joint 5 is specially connected with the back pressure member 302, and the back pressure member 302 can be respectively connected with the electronic micro-pressure meter 6 and the leakage module assembly 4 through the tee joint 5. When the first stop valve 7 is closed and the second stop valve 8 is opened, the back pressing piece 302 is communicated with the electronic micro-pressure gauge 6, so that the output pressure after the back pressing piece 302 can be measured, when the first stop valve 7 is opened and the second stop valve 8 is closed, the back pressing piece 302 is communicated with the leakage module assembly 4, and the set ultralow pressure can be continuously and stably fed into the leakage module assembly 4, so that the performance test of the gas leakage detection agent can be accurately performed, wherein the leakage module assembly 4 can be designed into a flange opening with a large diameter hole and used for detecting the corresponding gas film ultralow pressure gas leakage detection agent through a gas film detection method, and can also be of a micropore structure and used for detecting the corresponding foaming ultralow pressure gas leakage detection agent through a bubble method.
Further, the precision pressure regulating assembly 3 further includes a bypass line 303, the bypass line 303 is connected in parallel with the precision pressure regulating valve 301 and the back pressure member 302, a third stop valve 304 is disposed on the bypass line 303, a fourth stop valve 305 and a fifth stop valve 306 are both connected in series with the precision pressure regulating valve 301, and are respectively located at two sides of the precision pressure regulating valve 301, and the fourth stop valve 305 and the fifth stop valve 306 are both connected in parallel with the third stop valve 304.
In this embodiment, the pressure relief output of other air pressure intervals is designed while the ultra-low pressure relief output is realized, so that the output of high pressure, low pressure and ultra-low pressure can be realized, the precision pressure regulating assembly 3 is connected in parallel with the bypass pipeline 303, when other pressures need to be output, the fourth stop valve 305 and the fifth stop valve 306 on two sides of the precision pressure regulating valve 301 are closed, the third stop valve 304 beside the bypass pipeline 303 is opened, at this time, the pressure output by the back pressure piece 302 does not pass through the precision pressure regulating valve 301 any more, the back pressure piece 302 does not output ultra-low pressure any more, and the higher pressure is output, so as to meet the relief pressure output of a wider interval range.
Further, the precise pressure regulating valve 301 is an electric proportional valve, and further comprises a mechanical pressure reducing valve 9, wherein the mechanical pressure reducing valve 9 is connected between the air source pressure reducing valve 2 and the precise pressure regulating assembly 3, the mechanical micro-pressure gauge 10 is connected to the mechanical pressure reducing valve 9, the signal amplifier 11 is connected to the precise pressure regulating valve 301, and the front air filter 12 is connected between the air source pressure reducing valve 2 and the mechanical pressure reducing valve 9.
In this embodiment, the precise pressure regulating valve 301 is selected as an electro proportional valve, so that a lower interval and a more stable pressure output can be realized. A mechanical pressure reducing valve 9 may be further connected between the air source pressure reducing valve 2 and the precision pressure regulating assembly 3, so that the pressure of the air source pressure reducing valve 2 can be reduced to the safe input pressure of the precision pressure regulating valve 301, because the air inlet pressure of the precision pressure regulating valve 301 cannot be too high or is easy to damage, the air inlet pressure of the precision pressure regulating valve 301 is limited by the mechanical pressure reducing valve 9, so that the air inlet pressure of the precision pressure regulating valve 301 cannot be higher than 230Pa when the exhaust pressure of the precision pressure regulating valve 301 is set to 200Pa, otherwise, the meter jump is easy. In this embodiment, the signal amplifier 11 may be installed on the precise pressure regulating valve 301, so as to control the output pressure value of the precise pressure regulating valve 301, for example, in the adjustment range of 0-600 Pa, and set the exhaust pressure of 200Pa to be output, where the electric proportional valve may be DURY PQ1EE-A4H4, the mechanical pressure reducing valve 9 may be DURYR317-03E, and the signal amplifier 11 may be henry SG-003. In this embodiment, the air source pressure reducing valve 2 may also be connected to the front air filter 12 to filter the air in the air bottle, so as to ensure the purity of the exhaust.
Further, the back pressure member 302 is a titanium sintered member including a plurality of titanium sintered layers 3021 arranged at intervals.
In this embodiment, the back pressing member 302 may be a titanium sintered member, specifically, a plurality of titanium sintered layers 3021 arranged at intervals, the titanium sintered member has a microporous structure, and the leakage module assembly 4 further includes a microporous member 401, and an outlet end of the back pressing member 302 opens into the microporous member 401.
In this embodiment, when the leakage module assembly 4 is used for detecting the corresponding foaming ultra-low pressure gas leakage detection agent by using the bubble method, the leakage module assembly 4 is designed to be the microporous member 401, for example, when the leakage module assembly 4 is set to discharge ultra-low pressure of several hundred Pa, the microporous member 401 needs to have more micropores so as to meet the requirement of foaming detection agent to realize foaming, and the purpose of detecting the performance of the leakage detection agent is achieved.
Example 2
As shown in fig. 2 and 3, based on embodiment 1, the leakage module assembly 4 further includes a base 402, where the base 402 has a first communication channel 403, a second communication channel 404, a third communication channel 405, and a fourth communication channel 406 that are circumferentially arranged, the outlet of the back pressure member 302 is connected to the first communication channel 403, the rotating member 407 is rotatably disposed on the base 402, the microporous members 401 have inlets 4011, and four microporous members 401 are circumferentially arranged on the rotating member 407, each microporous member 401 is sequentially connected to the first communication channel 403, the second communication channel 404, the third communication channel 405, and the fourth communication channel 406 after rotating the rotating member 407, the rotating driving member 408 drives the rotating member 407 to rotate, the water spraying device is connected to the second communication channel 404, the air spraying device is connected to the third communication channel 405, and the hot air device is connected to the fourth communication channel 406.
When the gas leakage detecting device in this embodiment is used to detect the leakage detecting agent, a large number of test tests are usually required, and in the case that the leakage module assembly 4 detects the foaming detecting agent for the microporous member 401, after one detecting agent is sprayed to the microporous member 401, the problem of inaccurate detection occurs when the next detecting agent is detected, on the one hand, the detecting agent remains in the microporous member 401 to affect the next detecting agent, on the other hand, the leakage detecting agent on the microporous member 401 needs to be blown by the relative pressure of 230Pa to not affect the detection of the next leakage detecting agent, at least more than 60 seconds or more are required, and this process results in a decrease in the measuring efficiency. In order to reduce the waiting process, or to avoid the influence of the previous detection on the next detection caused by using one microporous member 401 to detect all the detection agents, the embodiment specially designs a plurality of microporous members 401, and the microporous members 401 perform various treatments and then detect, so that the influence of the previous detection on the next detection is well avoided.
Specifically, the rotating member 407 has four microporous members 401, each microporous member 401 rotates along with the rotating member 407 and sequentially passes through the first connecting channel 403, the second connecting channel 404, the third connecting channel 405 and the fourth connecting channel 406, that is, each microporous member 401 passes through four stations, namely, a detection position corresponding to the first connecting channel 403, a water spraying cleaning position corresponding to the second connecting channel 404, a soaking air spraying cleaning position corresponding to the third connecting channel 405 and a hot air drying position corresponding to the fourth connecting channel 406, so that each microporous member 401 is well cleaned and dried after being used for testing a gas leakage agent, and the influence on the detection of the next gas leakage agent is avoided. In addition, when one microporous member 401 detects leakage agent, the other three microporous members 401 are respectively subjected to water spraying cleaning, soaking and air spraying cleaning and hot air drying, so that after one microporous member 401 detects leakage agent, the microporous member 401 just dried can be quickly sent to a detection position, and the problems that after the microporous member 401 detects leakage liquid, the later detection can be carried out after waiting more than 60 seconds and the detection accuracy is affected are avoided.
The water spraying device is communicated with the second connecting channel 404 to realize water spraying for cleaning, the air spraying device is communicated with the third channel 405 to realize air pressure for air spraying cleaning, and the hot air device is communicated with the fourth channel 406 to realize hot air for blow-drying.
Further, the base 402 has a first fitting stop surface 4021, and the rotating member 407 has a second fitting stop surface 4071, and the first fitting stop surface 4021 and the second fitting stop surface 4071 slide in close contact.
In this embodiment, in order to ensure that the microporous member 401 on the rotating member 407 is communicated with the first connecting channel 403, the second connecting channel 404, the third channel 405 and the fourth channel 406, or is blocked by the first fitting blocking surface 4021, and simultaneously ensure that the first connecting channel 403, the second connecting channel 404, the third channel 405 and the fourth channel 406 can be well blocked by the second fitting blocking surface 4071 when not communicated with the four microporous members 401, the first fitting blocking surface 4021 and the second fitting blocking surface 4071 are designed to be tightly contacted and slid, so that water and air leakage are avoided, and in order to further improve the sealing effect, a sealing strip or a sealing ring can be additionally arranged to avoid the occurrence of air and water leakage.
Further, the rotation shaft of the rotation member 407 is horizontal, and the leakage module assembly 4 further includes a soaking tank 409, the soaking tank 409 being located below the rotation driving member 408, and being submerged by the soaking tank 409 when the microporous member 401 rotates to the bottommost end following the rotation member 407.
In this embodiment, when the microporous member 401 rotated to the soaking and air-jetting washing position is cleaned, it can be designed that the microporous member 401 is rotated to the soaking tank 409 to be immersed, and at this time, the cleaning effect of the microporous member 401 when being soaked and cleaned can be sufficiently improved by feeding high-pressure gas through the third channel 405, so that no residue of detection liquid exists on the microporous member 401, and thus, a good preparation is made for the next detection.
Further, the microporous member 401 is a sintered muffler.
In this embodiment, the microporous member 401 is designed as a sintering muffler, so that on one hand, sintering micropores of the sintering muffler can be well utilized, and the existing product can be directly used for testing and detecting the gas leakage agent by purchasing, on the other hand, a good foaming effect is achieved, so that the foaming gas leakage detection agent is well identified, and the foaming agent with the best foaming effect and most suitable for gas leakage detection is found.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (6)
1. The testing device of the ultra-low pressure gas leakage detection agent is characterized by comprising a gas source (1), a gas source pressure reducing valve (2), a precise pressure regulating assembly (3) and a leakage module assembly (4) which are connected in sequence, wherein the precise pressure regulating assembly (3) comprises a precise pressure regulating valve (301) and a back pressure piece (302) which are connected in sequence;
wherein a tee joint (5) is connected between the back pressure piece (302) and the leakage module assembly (4), the tee joint (5) is also connected with an electronic micro-manometer (6),
and also comprises
A first shut-off valve (7), the first shut-off valve (7) being connected between the tee (5) and the leakage module assembly (4),
a second stop valve (8), wherein the second stop valve (8) is arranged between the tee joint (5) and the electronic micro-manometer (6);
wherein, the precise pressure regulating component (3) also comprises
A bypass line (303), the bypass line (303) being connected in parallel with the precision pressure regulating valve (301) and the back pressure member (302),
a third shut-off valve (304), the third shut-off valve (304) being arranged on the bypass line (303),
a fourth stop valve (305) and a fifth stop valve (306), wherein the fourth stop valve (305) and the fifth stop valve (306) are connected in series with the precise pressure regulating valve (301) and are respectively positioned at two sides of the precise pressure regulating valve (301), and the fourth stop valve (305) and the fifth stop valve (306) are connected in parallel with the third stop valve (304);
wherein the leakage module assembly (4) comprises a microporous member (401), the outlet end of the back pressure member (302) opening into the microporous member (401);
wherein the leakage module assembly (4) further comprises
The base body (402), the base body (402) is provided with a first connecting channel (403), a second connecting channel (404), a third channel (405) and a fourth channel (406) which are circumferentially arranged, the outlet of the back pressure piece (302) is communicated with the first connecting channel (403),
the rotating piece (407), the rotating piece (407) is rotationally arranged on the base body (402), the microporous pieces (401) are provided with inlets (4011), the microporous pieces (401) are four and are circumferentially arranged on the rotating piece (407), after each microporous piece (401) rotates along with the rotating piece (407), the inlets (4011) of the microporous pieces (401) are sequentially communicated with the first connecting channel (403), the second connecting channel (404), the third channel (405) and the fourth channel (406),
a rotation driving member (408), the rotation driving member (408) driving the rotation member (407) to rotate,
a water spraying device, which is communicated with the second connecting channel (404),
an air injection device in communication with the third channel (405),
and the hot air device is communicated with the fourth channel (406).
2. The device for testing an ultra-low pressure gas leakage detecting agent according to claim 1, wherein the precise pressure regulating valve (301) is an electric proportional valve, further comprising
A mechanical pressure reducing valve (9), wherein the mechanical pressure reducing valve (9) is connected between the air source pressure reducing valve (2) and the precise pressure regulating assembly (3),
a mechanical micro-pressure gauge (10), wherein the mechanical micro-pressure gauge (10) is connected to the mechanical pressure reducing valve (9),
a signal amplifier (11), wherein the signal amplifier (11) is connected to the precise pressure regulating valve (301),
and the prepositive air filter (12) is connected between the air source pressure reducing valve (2) and the mechanical pressure reducing valve (9).
3. The device for testing an ultra-low pressure gas leakage tester according to claim 2, wherein the back pressure member (302) is a titanium sintered member, and comprises a plurality of titanium sintered layers (3021) arranged at intervals.
4. The device for testing an ultra-low pressure gas leakage detecting agent according to claim 1, wherein the base (402) has a first fitting blocking surface (4021), the rotating member (407) has a second fitting blocking surface (4071), and the first fitting blocking surface (4021) and the second fitting blocking surface (4071) are in close sliding contact.
5. The device for testing an ultra-low pressure gas leakage tester according to claim 4, wherein the rotary member (407) has a rotation axis along a horizontal direction, and the leakage module assembly (4) further comprises
-a soaking tank (409), the soaking tank (409) being located below the rotation driving member (408), the microporous member (401) being submerged by the soaking tank (409) when rotated to the bottommost end following the rotation member (407);
wherein the microporous member (401) is a sintered muffler.
6. A method for testing an ultralow pressure gas leakage detecting agent, characterized in that the ultralow pressure gas leakage detecting agent is detected by using the testing device for an ultralow pressure gas leakage detecting agent according to any one of claims 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310309040.3A CN116105078B (en) | 2023-03-28 | 2023-03-28 | Testing device and testing method for ultralow-pressure gas leakage detection agent |
Applications Claiming Priority (1)
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| JPH11248592A (en) * | 1998-02-27 | 1999-09-17 | Osaka Gas Co Ltd | Method and device for inspecting gas piping for airtightness and leakage and pressure measuring instrument used for the device |
| JP2001228047A (en) * | 2000-02-17 | 2001-08-24 | Fukuda:Kk | Volume-adjusting method in air leak testing device and air leak testing device having volume adjusting function |
| JP2002022591A (en) * | 2000-07-06 | 2002-01-23 | Daishinku Corp | Hermetically sealed workpiece holder and gas leak inspection apparatus |
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| CN110486629A (en) * | 2019-08-15 | 2019-11-22 | 上海中船三井造船柴油机有限公司 | Air-tightness detection device and method for double fuel host gas pipeline |
| CN110671605A (en) * | 2019-09-29 | 2020-01-10 | 中国石油工程建设有限公司 | System and method for safely emptying valve chamber of hydrogen-mixed natural gas pipeline |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWM318100U (en) * | 2006-11-23 | 2007-09-01 | Grand Hall Entpr Co Ltd | Gas storage detection and leakage alerting apparatus |
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| US4369647A (en) * | 1980-03-21 | 1983-01-25 | New Cosmos Electric Company Limited | Gas leakage detector |
| JPH11248592A (en) * | 1998-02-27 | 1999-09-17 | Osaka Gas Co Ltd | Method and device for inspecting gas piping for airtightness and leakage and pressure measuring instrument used for the device |
| JP2001228047A (en) * | 2000-02-17 | 2001-08-24 | Fukuda:Kk | Volume-adjusting method in air leak testing device and air leak testing device having volume adjusting function |
| JP2002022591A (en) * | 2000-07-06 | 2002-01-23 | Daishinku Corp | Hermetically sealed workpiece holder and gas leak inspection apparatus |
| JP2010160031A (en) * | 2009-01-07 | 2010-07-22 | Mitsubishi Heavy Ind Ltd | Method and leakage for testing piping leak |
| CN105092174A (en) * | 2015-08-14 | 2015-11-25 | 中国石油化工股份有限公司 | System for detecting gas tightness of compressed natural gas dispenser |
| CN110486629A (en) * | 2019-08-15 | 2019-11-22 | 上海中船三井造船柴油机有限公司 | Air-tightness detection device and method for double fuel host gas pipeline |
| CN110671605A (en) * | 2019-09-29 | 2020-01-10 | 中国石油工程建设有限公司 | System and method for safely emptying valve chamber of hydrogen-mixed natural gas pipeline |
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| CN116105078A (en) | 2023-05-12 |
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