CN219084327U - Air tightness testing device - Google Patents
Air tightness testing device Download PDFInfo
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- CN219084327U CN219084327U CN202223115891.4U CN202223115891U CN219084327U CN 219084327 U CN219084327 U CN 219084327U CN 202223115891 U CN202223115891 U CN 202223115891U CN 219084327 U CN219084327 U CN 219084327U
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Abstract
The utility model relates to the technical field of air tightness test, in particular to an air tightness test device, which comprises a test device main body, wherein the test device main body is provided with a positive pressure test flow path and a negative pressure test flow path, an air source inlet for accessing an external air source, an air source control device for switching on and off the external air source, a pressure regulating device for regulating the positive pressure test flow path and the negative pressure test flow path, and a flow path selecting device for selecting the test flow paths; one end of the air source control device is connected with an air source inlet pipeline, and the other end of the air source control device is connected with the pressure regulating device pipeline; the flow path selecting device is connected with the pressure adjusting device, the positive pressure test flow path and the negative pressure test flow path through pipelines respectively. The utility model can detect the air tightness of the system or the piece to be detected in a negative pressure detection mode, and can detect the air tightness of the system or the piece to be detected in a positive pressure maintaining mode.
Description
Technical Field
The utility model relates to the technical field of air tightness test, in particular to an air tightness test device.
Background
The continuous monitoring system for flue gas emission (CEMS) monitors the concentration and discharge capacity of pollutants emitted by a fixed source on line, and transmits data to an environmental protection department in real time, wherein the data is basic data for environmental protection supervision, the reality and effectiveness of the data must be ensured, and the air tightness of the system is ensured to be accurate and reliable. The air tightness seriously affects the accuracy, the authenticity and the repeatability of the system measurement data, is an important index for inspection, and the system measurement data is distorted due to the fact that the air tightness of the system does not reach standards.
The traditional continuous monitoring system (CEMS) for flue gas emission adopts a conventional leakage testing liquid mode to check the air tightness of the system, namely, the detected equipment is continuously ventilated, the positive pressure environment is ensured, the leakage points needing to be checked such as joint joints are smeared with the leakage testing liquid, and whether bubbles emerge at the joints of air pipes or not is checked. The air tightness detection method is time-consuming and labor-consuming, extremely depends on manual judgment, lacks rigor, is difficult to find for tiny leakage, is limited by the assembly form of products, cannot be checked in inaccessible places, cannot check the internal air tightness of a structure, and lacks rigor. On the other hand, when a flow path closer to the circuit system is inspected, the electronic component is easily touched, and the component and the system are irreversibly damaged.
Based on the above, the present utility model provides an air tightness testing device to solve the above problems.
Disclosure of Invention
The utility model aims to solve the technical problem of providing an air tightness testing device which can effectively solve the problem in the background technology.
In order to solve the problems, the utility model adopts the following technical scheme: the air tightness testing device comprises a testing device main body, wherein the testing device main body is provided with a positive pressure testing flow path and a negative pressure testing flow path, an air source inlet for accessing an external air source, an air source control device for switching on and off the external air source, a pressure regulating device for regulating the positive pressure testing flow path and the negative pressure testing flow path, and a flow path selecting device for selecting the testing flow paths; one end of the air source control device is connected with an air source inlet pipeline, and the other end of the air source control device is connected with the pressure regulating device pipeline; the flow path selecting device is connected with the pressure adjusting device, the positive pressure test flow path and the negative pressure test flow path through pipelines respectively.
As a preferred embodiment of the present utility model, the positive pressure test flow path includes an air source control device, a pressure adjusting device, a flow path selecting device, and a positive pressure test interface; one end of the air source control device is connected with an air source inlet pipeline, and the other end of the air source control device is connected with the pressure regulating device pipeline; one end of the flow path selecting device is connected with the pressure regulating device pipeline, and the other end of the flow path selecting device is connected with the positive pressure test interface pipeline.
As a preferred embodiment of the present utility model, the negative pressure test flow path includes an air source control device, a pressure adjusting device, a flow path selecting device, a vacuum generating device, a filter, a vacuum pressure gauge, an exhaust outlet, and a negative pressure test interface; one end of the air source control device is connected with an air source inlet pipeline, and the other end of the air source control device is connected with the pressure regulating device pipeline; one end of the flow path selecting device is connected with the pressure regulating device through a pipeline, and the other end of the flow path selecting device is connected with the vacuum generating device through a pipeline; one end of the vacuum generating device is connected with the exhaust outlet pipeline, and the other end of the vacuum generating device is respectively connected with the vacuum pressure gauge and the filter pipeline through the three-way joint; the other end of the filter is connected with the negative pressure test interface pipeline.
As a preferable scheme of the utility model, the positive pressure test interface is connected with an air inlet interface pipeline of the system to be tested, other interfaces of the system to be tested are all sealed, and a positive pressure test flow path is kept sealed.
As a preferable scheme of the utility model, the negative pressure test interface is connected with an air inlet interface pipeline of the system to be tested, and other interfaces of the system to be tested are all sealed to keep a negative pressure test flow path sealed.
As a preferable scheme of the utility model, the air source control device is a two-way ball valve.
As a preferred embodiment of the present utility model, the pressure regulator is a pressure reducing valve.
As a preferable aspect of the present utility model, the flow path selecting device is a three-way ball valve.
As a preferred embodiment of the present utility model, the vacuum generating device is a jet pump.
As a preferable mode of the utility model, the vacuum pressure gauge is vertically installed and keeps the same level with the test point of the negative pressure test flow path.
Compared with the prior art, the utility model provides the air tightness testing device, which has the following advantages:
1. the utility model can detect the air tightness of the system or the piece to be detected in a negative pressure detection mode, and can detect the air tightness of the system or the piece to be detected in a positive pressure maintaining mode.
2. The utility model can further realize the air tightness test of systems or pieces to be tested with different air tightness requirements by adjusting the pressure of the compressed air.
3. The utility model tests the air tightness of the system or the to-be-tested piece, does not cause hidden troubles such as dirt of a flow path and damage to electronic components, and can detect the air tightness in a structure which is not easy to reach outside.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present utility model;
FIG. 2 is a schematic diagram of the flow of the air source according to the present utility model;
FIG. 3 is a partial enlarged view A of FIG. 2;
wherein: 1. the testing device comprises a testing device main body 2, a positive pressure testing flow path 3, a negative pressure testing flow path 4, an air source inlet 5, an air source control device 6, a pressure regulating device 7, a flow path selecting device 8, a positive pressure testing interface 9, a vacuum generating device 10, a filter 11, a vacuum pressure gauge 12, an exhaust outlet 13, a negative pressure testing interface 14, a system to be tested 15, an air inlet interface 16 and an air path access port.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.
Referring to fig. 1 to 3, one embodiment of the present utility model provides an air tightness testing device, comprising a testing device main body 1, wherein the testing device main body 1 is provided with a positive pressure testing flow path 2 and a negative pressure testing flow path 3, and is provided with an air source inlet 4 for accessing an external air source, an air source control device 5 for switching on and off the external air source, a pressure adjusting device 6 for adjusting the positive pressure testing flow path 2 and the negative pressure testing flow path 3, and a flow path selecting device 7 for selecting the testing flow paths; one end of the air source control device 5 is connected with the air source inlet 4 in a pipeline manner, and the other end of the air source control device is connected with the pressure regulating device 6 in a pipeline manner; the flow path selecting device 7 is connected with the pressure regulating device 6, the positive pressure test flow path 2 and the negative pressure test flow path 3 respectively through pipelines.
In the embodiment, a positive pressure test flow path 2 is arranged, and the air tightness of the system can be detected by a positive pressure maintaining mode; the negative pressure test flow path 3 is arranged, and the air tightness of the system can be detected by the negative pressure principle; the gas source inlet 4 is arranged, and different gases are accessed for testing according to different air tightness requirements of the system to be tested; the device is provided with an air source control device 5, the air source control device 5 is a two-way ball valve, and an accessed external air source is connected and closed; the pressure regulating device 6 is arranged, the pressure regulating device 6 is a pressure reducing valve, and the pressure of compressed gas can be regulated, so that the air tightness test of systems with different air tightness requirements is realized; the flow path selecting device 7 is arranged, the flow path selecting device 7 is a three-way ball valve, and when the three-way ball valve is positioned in different flow paths, the three-way ball valve is in different test modes, namely a positive pressure test mode or a negative pressure test mode.
As a preferable mode of the present utility model, the positive pressure test flow path 2 includes an air source control device 5, a pressure regulating device 6, a flow path selecting device 7 and a positive pressure test interface 8; one end of the air source control device 5 is connected with the air source inlet 4 in a pipeline manner, and the other end of the air source control device is connected with the pressure regulating device 6 in a pipeline manner; one end of the flow path selecting device 7 is connected with the pressure regulating device 6 in a pipeline way, and the other end of the flow path selecting device is connected with the positive pressure test interface 8 in a pipeline way.
In this embodiment, referring to fig. 2 and 3, the air source control device 5 is a two-way ball valve, the pressure adjusting device 6 is a pressure reducing valve, and the flow path selecting device 7 is a three-way ball valve; and (3) when the flow paths of the three-way ball valve are (1) and (2), the positive pressure test mode is adopted.
Further, in the positive pressure test mode, compressed gas enters from the gas source inlet 4, sequentially passes through the two-way ball valve, the pressure reducing valve and the three-way ball valve to the positive pressure test interface 8, connects the system 14 to be tested to the positive pressure test interface 8, and then seals all other interfaces of the system 14 to be tested except the gas inlet interface 15 to complete the connection of the positive pressure test flow path 2.
Further, when the positive pressure test is performed, an external air source is connected through the two-way ball valve, the test pressure is regulated through the pressure reducing valve, after the pressure meets the requirement, the two-way ball valve is moved to cut off the air source, the numerical change of the pressure gauge on the pressure reducing valve is observed, the pressure drop numerical value in the specified time is recorded, and the comparison between the pressure drop numerical value and the required air tightness index is performed, so as to check whether the air tightness requirement is met.
As a preferred embodiment of the present utility model, the negative pressure test flow path 3 includes an air source control device 5, a pressure adjusting device 6, a flow path selecting device 7, a vacuum generating device 9, a filter 10, a vacuum pressure gauge 11, an exhaust outlet 12, and a negative pressure test interface 13; one end of the air source control device 5 is connected with the air source inlet 4 in a pipeline manner, and the other end of the air source control device is connected with the pressure regulating device 6 in a pipeline manner; one end of the flow path selecting device 7 is connected with the pressure regulating device 6 in a pipeline way, and the other end of the flow path selecting device is connected with the vacuum generating device 9 in a pipeline way; one end of the vacuum generating device 9 is connected with an exhaust outlet 12 through a pipeline, and the other end of the vacuum generating device is connected with a vacuum pressure gauge 11 and a filter 10 through a pipeline respectively through a three-way joint; the other end of the filter 10 is connected with the negative pressure test interface 13 in a pipeline manner.
In the embodiment, an air outlet of the jet pump is connected with an exhaust outlet 12, and a sampling port of the jet pump is connected with a filter 10 and a vacuum pressure gauge 11 through a three-way joint.
Further, referring to fig. 2 and 3, the air source control device 5 is a two-way ball valve, the pressure regulating device 6 is a pressure reducing valve, the flow path selecting device 7 is a three-way ball valve, the vacuum generating device 9 is a jet pump, and the filter 10 is an SMC straight-through filter; the use of the filter 10 can prolong the service life of the jet pump and increase the test accuracy; when the vacuum pressure gauge 11 is used, the vacuum pressure gauge must be vertically installed, the vacuum pressure gauge is required to be kept at the same level with a test point, a three-way joint adopts a stainless steel three-way joint, and the joint can be applied to high vacuum and strong pressure environments; and (3) when the flow paths of the three-way ball valve are (1) and (3), the negative pressure test mode is adopted.
Further, in the negative pressure test mode, all other interfaces except the air path access port 16 of the system 14 to be tested are sealed, so that the connection of the negative pressure test flow path 3 is completed; compressed gas enters from the gas source inlet 4, sequentially passes through the two-way ball valve, the pressure reducing valve and the three-way ball valve to the gas inlet of the jet pump, meanwhile, the jet pump pumps the gas in the system 14 to be tested, vacuumizes the gas, sequentially passes through the negative pressure test interface 13 and the filter 10 to the jet pump, and then is discharged from the exhaust outlet 12.
Further, during negative pressure test, the negative pressure test interface 13 is blocked, and the reading of the vacuum pressure gauge 11 at the moment is observed and recorded; then, all other interfaces except the air path inlet 16 of the system 14 to be tested are sealed, and the air path inlet 16 is connected with the negative pressure test interface 13; and moving the two-way ball valve to be introduced into an external air source, regulating the injection pressure of the jet pump through the pressure reducing valve, enabling compressed air to enter from the air source inlet 4, sequentially passing through the two-way ball valve, the pressure reducing valve and the three-way ball valve to the air inlet of the jet pump, simultaneously pumping air in the system 14 to be tested by the jet pump, vacuumizing the system, at the moment, observing the reading of the vacuum pressure gauge 11, observing the pressure change condition of the vacuum pressure gauge 11, recording the pressure change condition of the vacuum pressure gauge 11 in a specified time, comparing the front pressure value with the rear pressure value to obtain a pressure drop value of the differential representing the system, and comparing the pressure drop value with a required air tightness index to see whether the air tightness requirement is met.
Further, the vacuum test is performed by continuously drawing the vacuum of the system under test 14.
As a preferred scheme of the utility model, the positive pressure test interface 8 is connected with an air inlet interface 15 pipeline of the system to be tested 14, and other interfaces of the system to be tested 14 are all sealed, so that the positive pressure test flow path 2 is kept sealed.
As a preferred scheme of the utility model, the negative pressure test interface 13 is connected with an air inlet interface 15 pipeline of the system to be tested 14, and other interfaces of the system to be tested 14 are all sealed, so that the negative pressure test flow path 3 is kept sealed.
As a preferable mode of the present utility model, the air source control device 5 is a two-way ball valve.
As a preferred embodiment of the present utility model, the pressure regulator 6 is a pressure reducing valve.
As a preferable embodiment of the present utility model, the flow path selecting means 7 is a three-way ball valve.
As a preferred embodiment of the present utility model, the vacuum generating device 9 is a jet pump.
As a preferable mode of the present utility model, the vacuum gauge 11 is installed vertically, and is kept at the same level as the test point of the negative pressure test flow path 3.
The above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims (10)
1. The air tightness testing device comprises a testing device main body (1), and is characterized in that the testing device main body (1) is provided with a positive pressure testing flow path (2) and a negative pressure testing flow path (3) and is provided with an air source inlet (4) for accessing an external air source, an air source control device (5) for switching on and off the external air source, a pressure regulating device (6) for regulating the positive pressure testing flow path (2) and the negative pressure testing flow path (3) and a flow path selecting device (7) for selecting the testing flow paths;
one end of the air source control device (5) is connected with the air source inlet (4) in a pipeline, and the other end of the air source control device is connected with the pressure regulating device (6) in a pipeline;
the flow path selecting device (7) is respectively connected with the pressure adjusting device (6), the positive pressure test flow path (2) and the negative pressure test flow path (3) in a pipeline mode.
2. The air tightness testing device according to claim 1, wherein the positive pressure testing flow path (2) comprises an air source control device (5), a pressure regulating device (6), a flow path selecting device (7) and a positive pressure testing interface (8);
one end of the air source control device (5) is connected with the air source inlet (4) in a pipeline, and the other end of the air source control device is connected with the pressure regulating device (6) in a pipeline; one end of the flow path selecting device (7) is connected with the pressure regulating device (6) in a pipeline way, and the other end of the flow path selecting device is connected with the positive pressure test interface (8) in a pipeline way.
3. The air tightness testing device according to claim 2, wherein the negative pressure testing flow path (3) comprises an air source control device (5), a pressure regulating device (6), a flow path selecting device (7), a vacuum generating device (9), a filter (10), a vacuum pressure gauge (11), an exhaust outlet (12) and a negative pressure testing interface (13);
one end of the air source control device (5) is connected with the air source inlet (4) in a pipeline, and the other end of the air source control device is connected with the pressure regulating device (6) in a pipeline; one end of the flow path selecting device (7) is connected with the pressure regulating device (6) in a pipeline, and the other end of the flow path selecting device is connected with the vacuum generating device (9) in a pipeline;
one end of the vacuum generating device (9) is connected with an exhaust outlet (12) in a pipeline, and the other end of the vacuum generating device is respectively connected with a vacuum pressure gauge (11) and a filter (10) in a pipeline through a three-way joint;
the other end of the filter (10) is connected with the negative pressure test interface (13) in a pipeline manner.
4. A gas tightness test device according to claim 3, wherein the positive pressure test interface (8) is in pipe connection with the gas inlet interface (15) of the system under test (14), and the other interfaces of the system under test (14) are all sealed, keeping the positive pressure test flow path (2) sealed.
5. A gas tightness test device according to claim 3, wherein the negative pressure test interface (13) is in pipe connection with the gas inlet interface (15) of the system under test (14), and the other interfaces of the system under test (14) are all sealed, keeping the negative pressure test flow path (3) sealed.
6. A gas tightness testing device according to claim 3, wherein said gas source control means (5) is a two-way ball valve.
7. A gas tightness test device according to claim 3, characterized in that the pressure regulating means (6) is a pressure reducing valve.
8. A gas tightness test device according to claim 3, wherein said flow path selection means (7) is a three-way ball valve.
9. A gas tightness test device according to claim 3, characterized in that the vacuum generating means (9) is a jet pump.
10. A gas tightness test device according to claim 3, characterized in that said vacuum pressure gauge (11) is mounted vertically, level with the test point of said negative pressure test flow path (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223115891.4U CN219084327U (en) | 2022-11-23 | 2022-11-23 | Air tightness testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223115891.4U CN219084327U (en) | 2022-11-23 | 2022-11-23 | Air tightness testing device |
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| Publication Number | Publication Date |
|---|---|
| CN219084327U true CN219084327U (en) | 2023-05-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223115891.4U Active CN219084327U (en) | 2022-11-23 | 2022-11-23 | Air tightness testing device |
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| CN (1) | CN219084327U (en) |
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- 2022-11-23 CN CN202223115891.4U patent/CN219084327U/en active Active
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