CN213956689U - Multifunctional air tightness detector - Google Patents
Multifunctional air tightness detector Download PDFInfo
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- CN213956689U CN213956689U CN202120128656.7U CN202120128656U CN213956689U CN 213956689 U CN213956689 U CN 213956689U CN 202120128656 U CN202120128656 U CN 202120128656U CN 213956689 U CN213956689 U CN 213956689U
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- air
- tightness detector
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Abstract
The utility model relates to an air tightness detector, concretely relates to multifunctional air tightness detector, including high-pressure air pump, tracer air chamber, vacuum pump, gas collecting tank and main pipeline, the main pipeline passes through bleed-off line and vacuum pump connection, the main pipeline links to each other with the exhaust duct, the main pipeline passes through high-pressure gas pipeline and is connected with high-pressure air pump, the main pipeline is connected with a measured gas pipeline, comparison gas pipeline, a measured gas pipeline communicates with a measured piece, comparison gas pipeline communicates with a comparison piece, a differential pressure sensor D is arranged between the measured gas pipeline and the comparison gas pipeline; the utility model provides a technical scheme can effectively overcome the easy false retrieval that prior art exists, can't detect the defect of the concrete position of leak source.
Description
Technical Field
The utility model relates to an air tightness detector, concretely relates to multi-functional air tightness detector.
Background
The air tightness detection is also called leakage detection, and the air tightness of a sealing part is one of important factors influencing the product quality, so that the air tightness detection is a necessary inspection item in the production process of many important parts and assemblies, such as cylinder bodies, cylinder covers, engine assemblies, refrigeration systems and the like, in the industries of automobiles, air conditioners, refrigerators and the like. The traditional methods for detecting the air tightness include a bubble method, a helium mass spectrometry method, a direct pressure method and the like. The bubble method is visual, but the testing efficiency is low, the influence of subjective factors is large, misjudgment is easy, only qualitative judgment can be made, and quantitative judgment is difficult to be made; helium mass spectrometry has high accuracy, but is cost prohibitive.
The direct pressure method needs to detect through an air tightness detector, the traditional air tightness detector has single function, only a single method can be adopted for leak detection, false detection is easy to occur, and the specific position of a leak point cannot be detected.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
To the above-mentioned shortcoming that prior art exists, the utility model provides a multi-functional gas tightness detector can effectively overcome the easy false retrieval that prior art exists, can't detect the defect of the concrete position of leak source.
(II) technical scheme
In order to achieve the above purpose, the utility model discloses a following technical scheme realizes:
a multifunctional air tightness detector comprises a high-pressure air pump, a tracer air chamber, a vacuum pump, a gas collection box and a main pipeline, wherein the main pipeline is connected with the vacuum pump through an air exhaust pipeline, and the main pipeline is connected with an exhaust pipeline;
the main pipeline is connected with a high-pressure air pump through a high-pressure air pipeline, the main pipeline is connected with a measured piece air pipeline and a comparison piece air pipeline, the measured piece air pipeline is communicated with a measured piece, the comparison piece air pipeline is communicated with a comparison piece, and a differential pressure sensor D is arranged between the measured piece air pipeline and the comparison piece air pipeline;
the main pipeline is connected with a trace gas pump through a trace gas pipeline, the main pipeline is connected with a gas collecting tank through a gas collecting pipeline, a gas flow sensor is arranged on the gas collecting pipeline, the gas collecting pipeline is connected with a gas probe through a measuring pipeline, and the trace gas chamber is connected with a gas spray gun through a connecting pipe.
Preferably, a sixth valve is arranged on the main pipeline, a first valve is arranged on the high-pressure gas pipeline, an eighth valve is arranged on the measured part gas pipeline, and a ninth valve is arranged on the comparison part gas pipeline.
Preferably, a differential pressure sensor D is arranged between the eighth valve, the ninth valve and the sixth valve.
Preferably, a second valve is arranged on the tracer gas pipeline, and a fourth valve is arranged on the gas collection pipeline.
Preferably, a measuring pipeline is arranged between the fourth valve and the gas flow sensor, and a seventh valve is arranged on the measuring pipeline.
Preferably, the end of the measuring pipe is connected to the gas probe by a hose.
Preferably, the air exhaust pipeline is provided with a third valve, and the exhaust pipeline is provided with a fifth valve.
Preferably, a pressure sensor is arranged on the main pipeline.
(III) advantageous effects
Compared with the prior art, the utility model provides a multi-functional gas tightness detector can use two kinds of methods of positive pressure method, negative pressure method to leak hunting to the use is sniffed the cooperation of method, jet-propelled method and is carried out the leak hunting, effectively improves the degree of accuracy of leak hunting, can also accurately detect the specific position of leak source through sniffing method, jet-propelled method.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
A multifunctional air tightness detector is shown in figure 1 and comprises a high-pressure air pump 7, a tracing air pump 8, a tracing air chamber 17, a vacuum pump 9, a gas collection box 10 and a main pipeline 1, wherein the main pipeline 1 is connected with the vacuum pump 9 through an air suction pipeline 4, and the main pipeline 1 is connected with an exhaust pipeline 6.
The air exhaust pipeline 4 is provided with a third valve V3, and the exhaust pipeline 6 is provided with a fifth valve V5.
The main pipeline 1 is provided with a pressure sensor P1.
Main pipeline 1 is connected with high compression pump 7 through high-pressure gas pipeline 2, and main pipeline 1 is connected with a measured gas pipeline 11, comparison gas pipeline 12, and measured a gas pipeline 11 and a measured intercommunication, comparison gas pipeline 12 and comparison intercommunication are equipped with differential pressure sensor D between measured a gas pipeline 11, the comparison gas pipeline 12.
The main pipeline 1 is provided with a sixth valve V6, the high-pressure gas pipeline 2 is provided with a first valve V1, the tested piece gas pipeline 11 is provided with an eighth valve V8, and the comparison piece gas pipeline 12 is provided with a ninth valve V9.
A differential pressure sensor D is provided between the eighth valve V8, the ninth valve V9, and the sixth valve V6.
The positive pressure method leak detection method comprises the following specific steps:
s1, inflation: opening valves V1, V6, V8 and V9, and inflating the tested piece and the comparison piece by using a high-pressure air pump 7;
s2, balancing: closing the valves V1 and V6 to balance the gas in the tested piece gas pipeline 11 and the reference piece gas pipeline 12;
s3, detection: detecting the pressure difference inside the gas pipeline 11 of the detected piece and the gas pipeline 12 of the comparison piece through a differential pressure sensor D to judge the leakage;
s4, exhaust: the valves V6, V5 are opened and the gas is discharged through the exhaust pipe 6.
The method for detecting the leakage by the negative pressure method comprises the following specific steps:
s1, inflation: opening valves V3, V6, V8 and V9, and vacuumizing the tested piece and the comparison piece by using a vacuum pump 9;
s2, balancing: closing the valves V3 and V6 to balance the gas in the tested piece gas pipeline 11 and the reference piece gas pipeline 12;
s3, detection: detecting the pressure difference inside the gas pipeline 11 of the detected piece and the gas pipeline 12 of the comparison piece through a differential pressure sensor D to judge the leakage;
s4, breaking empty: the vacuum was broken by opening valves V6 and V5.
In the technical scheme of the application, in the detection process of positive pressure method leak detection and negative pressure method leak detection, if the differential pressure sensor D can detect the pressure difference, the leakage point of the tested piece is indicated, and the differential pressure sensor D can adopt an SZ1151/3051/3351GP type pressure transmitter.
The pressure sensor P1 on the main pipeline 1 can detect the gas pressure inside the gas pipeline 11 of the tested piece and the gas pipeline 12 of the contrast piece, so as to prevent the over-inflation, and the pressure sensor P1 can adopt an MIK-P300 series pressure transmitter.
The main pipeline 1 is connected with the trace gas pump 8 through the trace gas pipeline 3, the main pipeline 1 is connected with the gas collecting tank 10 through the gas collecting pipeline 5, the gas collecting pipeline 5 is provided with a gas flow sensor P2, the gas collecting pipeline 5 is connected with the gas probe 15 through the measuring pipeline 14, and the trace gas chamber 17 is connected with the gas spray gun 16 through a connecting pipe.
The tracer gas pipeline 3 is provided with a second valve V2, and the gas collection pipeline 5 is provided with a fourth valve V4.
A measuring pipeline 14 is arranged between the fourth valve V4 and the gas flow sensor P2, and a seventh valve V7 is arranged on the measuring pipeline 14.
The end of the measuring pipe 14 is connected to a gas probe 15 via a hose.
The specific steps of finding the missing point by the sniffing method comprise:
s1, emptying: opening valves V3, V6 and V8, and vacuumizing the tested piece by using a vacuum pump 9;
s2, filling a tracer gas: closing the third valve V3, opening the second valve V2, and filling the detected piece with tracer gas by using a tracer gas pump 8;
s3, detecting a leakage hole: closing the valves V2, V6 and V8, opening the seventh valve V7, and performing leak point sniffing on the tested piece through the gas probe 15 to search for a leak point;
s4, exhaust: the valves V8, V6, V5 are opened and the tracer gas is vented through the exhaust line 6.
In the sniffing method, the gas probe 15 is moved on the surface of the detected piece, when the gas flow sensor P2 detects the trace gas, the position is a leak point, and the size of the leak point can be determined according to the leak flow rate of the trace gas at the leak point.
The specific steps of finding the leakage point by the air injection method comprise:
s1, emptying: opening valves V3, V6 and V8, and vacuumizing the tested piece by using a vacuum pump 9;
s2, detecting a leakage hole: closing the third valve V3, opening the fourth valve V4, filling tracer gas into the tested piece by using the gas spray gun 16, and searching for a leak point;
s3, breaking empty: the fourth valve V4 is closed and the fifth valve V5 is opened to break the vacuum.
In the gas injection method, a gas flow sensor P2 is used for detecting the gas flow F1 generated inside the gas collecting pipeline 5 when the gas spray gun 16 fills the reference part with the tracer gas; when the gas flow sensor P2 is used to detect that the gas spray gun 16 charges trace gas into the tested piece, the gas flow F2 generated inside the gas collecting pipeline 5 indicates that a leak point exists in the tested piece if the gas flow F2 is less than the gas flow F1, the specific leak point position is the position where the trace gas is sprayed out from the surface of the tested piece, and the gas flow sensor P2 can adopt a LWQ type gas turbine flowmeter.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (8)
1. The utility model provides a multi-functional gas tightness detector which characterized in that: the device comprises a high-pressure air pump (7), a trace air pump (8), a trace air chamber (17), a vacuum pump (9), a gas collection box (10) and a main pipeline (1), wherein the main pipeline (1) is connected with the vacuum pump (9) through an air suction pipeline (4), and the main pipeline (1) is connected with an exhaust pipeline (6);
the main pipeline (1) is connected with a high-pressure air pump (7) through a high-pressure gas pipeline (2), the main pipeline (1) is connected with a measured part gas pipeline (11) and a comparison part gas pipeline (12), the measured part gas pipeline (11) is communicated with a measured part, the comparison part gas pipeline (12) is communicated with a comparison part, and a differential pressure sensor D is arranged between the measured part gas pipeline (11) and the comparison part gas pipeline (12);
the main pipeline (1) is connected with a trace gas pump (8) through a trace gas pipeline (3), the main pipeline (1) is connected with a gas collecting box (10) through a gas collecting pipeline (5), a gas flow sensor (P2) is arranged on the gas collecting pipeline (5), the gas collecting pipeline (5) is connected with a gas probe (15) through a measuring pipeline (14), and a trace gas chamber (17) is connected with a gas spray gun (16) through a connecting pipe.
2. The multi-functional air-tightness detector according to claim 1, characterized in that: be equipped with sixth valve (V6) on trunk line (1), be equipped with first valve (V1) on high-pressure gas pipeline (2), be equipped with eighth valve (V8) on surveyed a gas pipeline (11), be equipped with ninth valve (V9) on comparison gas pipeline (12).
3. The multi-functional air-tightness detector according to claim 2, characterized in that: a differential pressure sensor D is arranged among the eighth valve (V8), the ninth valve (V9) and the sixth valve (V6).
4. The multi-functional air-tightness detector according to claim 1, characterized in that: and a second valve (V2) is arranged on the tracer gas pipeline (3), and a fourth valve (V4) is arranged on the gas collection pipeline (5).
5. The multi-functional air-tightness detector according to claim 4, characterized in that: a measuring pipeline (14) is arranged between the fourth valve (V4) and the gas flow sensor (P2), and a seventh valve (V7) is arranged on the measuring pipeline (14).
6. The multi-functional air-tightness detector according to claim 5, characterized in that: the end part of the measuring pipeline (14) is connected with a gas probe (15) through a hose.
7. The multi-functional air-tightness detector according to claim 1, characterized in that: and a third valve (V3) is arranged on the air exhaust pipeline (4), and a fifth valve (V5) is arranged on the exhaust pipeline (6).
8. The multi-functional air-tightness detector according to claim 1, characterized in that: and a pressure sensor (P1) is arranged on the main pipeline (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120128656.7U CN213956689U (en) | 2021-01-18 | 2021-01-18 | Multifunctional air tightness detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120128656.7U CN213956689U (en) | 2021-01-18 | 2021-01-18 | Multifunctional air tightness detector |
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| Publication Number | Publication Date |
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| CN213956689U true CN213956689U (en) | 2021-08-13 |
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| CN202120128656.7U Expired - Fee Related CN213956689U (en) | 2021-01-18 | 2021-01-18 | Multifunctional air tightness detector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114704777A (en) * | 2022-04-28 | 2022-07-05 | 西安热工研究院有限公司 | Leakage detection device and method for heat supply network circulating water system |
-
2021
- 2021-01-18 CN CN202120128656.7U patent/CN213956689U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114704777A (en) * | 2022-04-28 | 2022-07-05 | 西安热工研究院有限公司 | Leakage detection device and method for heat supply network circulating water system |
| CN114704777B (en) * | 2022-04-28 | 2024-03-12 | 西安热工研究院有限公司 | Leakage detection device and method for heat supply network circulating water system |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210813 Termination date: 20220118 |
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| CF01 | Termination of patent right due to non-payment of annual fee |