CN217520688U - Air tightness testing device - Google Patents
Air tightness testing device Download PDFInfo
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- CN217520688U CN217520688U CN202221343664.4U CN202221343664U CN217520688U CN 217520688 U CN217520688 U CN 217520688U CN 202221343664 U CN202221343664 U CN 202221343664U CN 217520688 U CN217520688 U CN 217520688U
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Abstract
The application is suitable for the technical field of testing, and provides an air tightness testing device which comprises an air supply assembly, a pipeline assembly and a testing assembly; the pipeline assembly comprises a first pipeline, a second pipeline and a third pipeline; the first end of the first pipeline is connected with the air outlet end of the air supply assembly, and the second pipeline is connected with the second end of the first pipeline and is used for connecting a piece to be tested; the third pipeline is connected with the second end of the first pipeline or is configured to be connected with a piece to be tested; the testing assembly comprises a pressure gauge, the pressure gauge is provided with a first air hole communicated with the third pipeline and a second air hole communicated with the outside, and the first air hole and the second air hole are respectively arranged at two opposite ends of the pressure gauge; the pressure gauge is configured to acquire a pressure value through a liquid level position in the pressure gauge, and is configured to acquire the pressure value before and after a preset interval time, respectively, so as to acquire a pressure difference of the piece to be tested. So set up for gas tightness testing arrangement's structure is very simple, and helps reducing gas tightness testing arrangement's cost.
Description
Technical Field
The application belongs to the technical field of testing, and more specifically relates to an air tightness testing device.
Background
Before the battery box is used, the air tightness of the battery box is generally required to be detected so as to improve the safety performance of the battery box. At present, a battery box generally uses a microcomputer chip, a high-precision sensor, a zero-leakage electromagnetic valve and the like to carry out air tightness test, so that the test process and data acquisition can be strictly controlled during test, and special software is subsequently adopted to analyze and process data to realize air tightness test; however, the structure of the airtightness test is complicated and the cost is high.
SUMMERY OF THE UTILITY MODEL
One of the purposes of the embodiment of the application is as follows: the utility model provides an air tightness testing device, aims at solving among the prior art, air tightness testing device is with high costs, the technical problem of structure complicacy.
In order to solve the technical problem, the embodiment of the application adopts the following technical scheme:
provided is a airtightness testing apparatus including:
a gas delivery assembly configured to deliver gas under pressure;
the pipeline assembly comprises a first pipeline, a second pipeline and a third pipeline; the first end of the first pipeline is connected with the air outlet end of the air supply assembly, and the second pipeline is connected with the second end of the first pipeline and is used for connecting a piece to be tested; the third pipeline is connected with the second end of the first pipeline or is configured to be connected with a piece to be tested;
the test component comprises a pressure gauge, and the pressure gauge is a U-shaped pipe; the pressure gauge is provided with a first air hole communicated with the third pipeline and a second air hole communicated with the outside, and the first air hole and the second air hole are respectively arranged at two opposite ends of the pressure gauge; the pressure gauge is configured to acquire a pressure value through a liquid level position in the pressure gauge, and is configured to acquire the pressure value before and after a preset interval time, respectively, so as to acquire a pressure difference of the piece to be tested.
In one embodiment, the pressure gauge comprises a first section and a second section which are distributed at intervals, and a connecting section connected between the first section and the second section; the first air hole is formed in the first section, the second air hole is formed in the second section, and the pressure gauge is configured to obtain a pressure value through the liquid level position of the first section and/or the second section; the test assembly further includes a scale positioned between the first section and the second section.
In one embodiment, the test assembly further comprises a housing, the housing defining a first interface and a second interface; the pressure gauge is arranged in the shell, the first air hole is communicated with the first interface, and the first interface is also communicated with the third pipeline; the second air hole is communicated with the second interface, and the second interface is also communicated with the outside.
In one embodiment, the airtightness testing apparatus further comprises a pressurization gun provided in the first pipeline, the pressurization gun having a pressurization switch, the pressurization gun being configured to allow a gas pressurized by the gas supply assembly to pass therethrough when the pressurization switch is turned on.
In one embodiment, the pressurizing gun is provided with a release switch, and the release switch and the pressurizing switch can be selectively opened; the pressurization gun is configured to: when the air release switch is turned on and the pressure switch is turned off, the air of the pressure gauge and the test piece is released.
In one embodiment, a muffler is provided at the bleed switch.
In one embodiment, the first conduit is provided with a flow meter.
In one embodiment, the first conduit is provided with a moisture separator.
In one embodiment, the first line is provided with a speed regulating valve and/or a pressure regulating valve.
In one embodiment, the gas supply assembly comprises a gas storage tank and an air compressor, the first end of the first pipeline is connected with the gas outlet end of the gas storage tank, and the air compressor is arranged on the gas storage tank and is configured to pump gas in the gas storage tank.
The beneficial effects of the gas tightness testing arrangement that this application embodiment provided lie in:
according to the air tightness testing device provided by the embodiment of the application, during testing, a to-be-tested piece can be connected with the second pipeline, the air supply assembly supplies air under pressure, so that the air is supplied to the first pipeline under pressure and enters the to-be-tested piece and the pressure gauge through the second pipeline and the third pipeline, after the air supply assembly supplies a proper amount of air under pressure, corresponding pressure values are obtained through the liquid level position in the pressure gauge before and after the preset interval time, the pressure values obtained before and after the preset interval time can be calculated, the pressure difference of the to-be-tested piece before and after the preset interval time can be obtained, and therefore the air tightness of the to-be-tested piece can be obtained through the pressure difference; based on this, in this embodiment, acquire the pressure differential of waiting to test the piece before and after preset interval time through the pressure gauge for the U type pipe, can acquire the gas tightness of waiting to test the piece, so set up for gas tightness testing arrangement's structure is very simple, and helps reducing gas tightness testing arrangement's cost.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a tightness testing device provided in an embodiment of the present application;
fig. 2 is a schematic view of fig. 1.
Wherein, in the figures, the various reference numbers:
10-a gas delivery assembly; 11-a gas storage tank; 12-an air compressor; 20-a tubing assembly; 21-a first conduit; 211-a first tube section; 212-a second tube section; 22-a second conduit; 23-a third line; 30-a test component; 31-a pressure gauge; 3101-a first air hole; 3102-a second air hole; 311-first section; 312-a second segment; 313-a connecting segment; 32-a housing; 40-a pressurized gun; 401 — a first channel; 402-a second channel; 41-a pressure switch; 42-air release switch; 43-a gun body; 44-a muffler; 50-a flow meter; 60-a moisture separator; 70-speed regulating valve; 80-pressure regulating valve; m-a test piece to be tested.
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative and intended to explain the present application and should not be construed as limiting the present application.
In the description of the present application, it is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be considered limiting of the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise, wherein two or more includes two.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
The following detailed description is made with reference to the specific drawings and examples:
example one
Referring to fig. 1 to 2, the air tightness testing apparatus provided in the embodiment of the present application is mainly used for testing the air tightness of a test piece m to be tested, wherein the test piece m to be tested may be a battery pack, a battery box or other structures requiring air tightness.
Specifically, the airtightness testing apparatus includes a gas supply assembly 10, a piping assembly 20 and a testing assembly 30.
The gas delivery assembly 10 is configured to deliver gas under pressure.
The pipeline assembly 20 comprises a first pipeline 21, a second pipeline 22 and a third pipeline 23, wherein the first pipeline 21, the second pipeline 22 and the third pipeline 23 are respectively provided with a first end and a second end which are arranged oppositely; the first end of first pipeline 21 is connected the end of giving vent to anger of sending gas subassembly 10, and the second end of first pipeline 21 is all connected to the first end of second pipeline 22 and the first end of third pipeline 23, and the second end of second pipeline 22 is used for connecting waiting to test a piece m. Based on this, it can be understood that the first pipeline 21, the second pipeline 22 and the third pipeline 23 are combined to form a three-way pipeline, and the present embodiment does not limit the first pipeline 21, the second pipeline 22 or the third pipeline 23 to be a pipeline with a large length, and in fact, as long as the first pipeline 21, the second pipeline 22 and the third pipeline 23 can all be ventilated, even the first pipeline 21, the second pipeline 22 and the third pipeline 23 can form a three-way joint, that is, the first pipeline 21, the second pipeline 22 and the third pipeline 23 are respectively three ends of the three-way joint.
The test assembly 30 includes a pressure gauge 31, the pressure gauge 31 being a U-tube. The pressure gauge 31 has a first gas hole 3101 and a second gas hole 3102, and the first gas hole 3101 and the second gas hole 3102 are respectively opened at opposite ends of the pressure gauge 31, that is, the first gas hole 3101 and the second gas hole 3102 are respectively opened at opposite ends of the pressure gauge 31. The first air hole 3101 is communicated with the second end of the third pipeline 23, and the second air hole 3102 is configured to communicate with the outside.
The pressure gauge 31 is configured to acquire a pressure value from a liquid level position within the pressure gauge 31. For example, when the pressure gauge 31 is used, a liquid can be contained in the pressure gauge 31, and under natural conditions, the air pressures at the two opposite ends of the pressure gauge 31 are basically equal, so that the liquid levels at the two opposite ends of the pressure gauge 31 are basically even; when gas is introduced into one end of the pressure gauge 31, liquid can flow to the other end of the pressure gauge 31 under the pressure of the gas, the liquid level position of the end, into which the gas is introduced, of the pressure gauge 31 is lowered, and the liquid level position of the other end of the pressure gauge 31 is raised, namely, the liquid level positions of the two opposite ends of the pressure gauge 31 are changed, so that the moving distance of the liquid can be obtained through the liquid level position of at least one end in the pressure gauge 31, and the pressure value of the gas introduced into the pressure gauge 31 can be calculated through the distance.
The pressure gauge 31 is also configured to acquire pressure values before and after a preset interval time, respectively, to acquire a pressure difference of the piece m to be tested.
Based on this, the air tightness testing device provided in the embodiment of the present application may connect the to-be-tested piece m to the second end of the second pipeline 22 during testing, and then, make the air feeding assembly 10 feed air under pressure, so that the air is fed to the first pipeline 21 under pressure and is introduced into the to-be-tested piece m through the second pipeline 22, and at this time, the air may also be introduced into the pressure gauge 31 through the third pipeline 23; after the gas supply assembly 10 pumps a proper amount of gas, stopping pumping the gas supply assembly 10, and acquiring a pressure value of the pressure gauge 31 through the liquid level position of the pressure gauge 31 at the moment, wherein the pressure value is a first preset pressure value; after the preset interval time, acquiring a pressure value of the pressure gauge 31 through the liquid level position of the pressure gauge 31, wherein the pressure value is a second pressure value; thus, the first pressure value and the second pressure value are respectively the pressure values obtained by the pressure gauge 31 before and after the preset interval time. It should be noted that, when the gas feeding assembly 10 stops feeding gas, since the second end of the first pipeline 21 is connected to the first end of the second pipeline 22 and the first end of the third pipeline 23, respectively, so that the first pipeline 21, the second pipeline 22 and the third pipeline 23 form a three-way pipeline, the test piece m to be tested and the pressure gauge 31 are communicated with each other through the three-way pipeline, so that the pressure value tested by the pressure gauge 31 can reflect the gas pressure condition of the test piece m to be tested, and understandably, if the gas inside the test piece m to be tested leaks, the liquid level position inside the pressure gauge 31 also changes; therefore, before and after the preset interval time, if the internal gas of the piece m to be tested leaks, the first pressure value and the second pressure value are different, and based on the difference, the pressure difference of the piece m to be tested before and after the preset interval time can be obtained by calculating the pressure difference of the first pressure value and the second pressure value, so that the air tightness condition of the piece m to be tested can be obtained through the pressure difference, namely, the air tightness test of the piece m to be tested is completed.
It should be noted that "after the gas supply module 10 pumps a proper amount of gas, the gas supply module 10 stops pumping gas" as described above may be determined based on the first preset pressure value, that is, the timing when the gas supply module 10 stops pumping gas may be determined by whether the pressure value of the pressure gauge 31 reaches the first preset pressure value; specifically, during testing, a first preset pressure value can be preliminarily set according to the internal capacity of the piece m to be tested, when the pressure value of the gas supply assembly 10 for supplying gas to the pressure gauge 31 is the first preset pressure value, the gas supply assembly 10 stops supplying gas, so that a second preset pressure value of the pressure gauge 31 can be obtained after a preset interval time, and the gas tightness of the piece m to be tested is obtained through the first preset pressure value and the second pressure value.
Therefore, the air tightness testing device provided by the embodiment can obtain the air tightness of the piece m to be tested by obtaining the pressure difference of the piece m to be tested before and after the preset interval time through the pressure gauge 31 of the U-shaped pipe, so as to realize the air tightness test of the piece m to be tested, and the air tightness testing device is arranged so that the structure of the air tightness testing device is very simple and the cost of the air tightness testing device is reduced.
In one embodiment, referring to fig. 1, the pressure gauge 31 includes a first section 311, a second section 312 and a connection section 313, the first section 311 and the second section 312 are spaced apart, the connection section 313 is connected between the first section 311 and the second section 312, and the first section 311, the connection section 313 and the second section 312 are sequentially communicated. The first air hole 3101 is opened at the first section 311, that is, the first air hole 3101 is an opening at an end of the first section 311 far from the connecting section 313; the second air hole 3102 is opened in the second section 312, that is, the second air hole 3102 is an opening in the end of the second section 312 remote from the connection section 313. The pressure gauge 31 is configured to acquire a pressure value from a liquid level position of the first section 311 and/or the second section 312, and specifically, when the liquid inside the pressure gauge 31 flows by the gas, liquid levels of the first section 311 and the second section 312 both change, and based on this, a pressure value can be acquired from a liquid level position of the first section 311 and/or a liquid level position of the second section 312.
The test assembly 30 further comprises a scale positioned between the first section 311 and the second section 312. So set up, the scale sets up between first section 311 and second section 312, then the liquid level position of first section 311 and second section 312 all can obtain through a scale, and need not to set up two scales, so help compressing the volume of test component 30.
In one embodiment, referring to fig. 1, the testing assembly 30 further includes a housing 32, and the pressure gauge 31 is disposed in the housing 32; so set up, pressure gauge 31 can realize spacingly in shell 32, helps improving the positional stability of pressure gauge 31, so effectively prevent that the liquid in the pressure gauge 31 from toppling over the condition that the liquid level position changes appears because of pressure gauge 31, so help improving the accuracy of the pressure value that pressure gauge 31 obtained.
Moreover, the housing 32 is provided with a first interface (not shown in the figure) and a second interface (not shown in the figure) which are distributed at intervals, the first air hole 3101 is communicated with the first interface, and the first interface is also communicated with the second end of the third pipeline 23, that is, the first air hole 3101 and the third pipeline 23 are communicated through the first interface; the second air hole 3102 is communicated with the second interface, and the second interface is also communicated with the outside, that is, the second air hole 3102 is communicated with the outside through the second interface. So set up for the relative both ends of pressure gauge 31 are put through respectively in first interface and second interface, so help further improving the positional stability of pressure gauge 31 to help further improving the test accuracy of pressure gauge 31.
In one embodiment, referring to fig. 1, the airtightness testing apparatus further includes a pressurizing gun 40, the pressurizing gun 40 is disposed on the first pipeline 21, and the pressurizing gun 40 has a pressurizing switch 41. The pressurizing gun 40 is configured to allow the gas pumped by the gas supply assembly 10 to pass through when the pressurizing switch 41 is turned on, and understandably, the gas pumped by the gas supply assembly 10 can pass through the first pipeline 21 into the piece m to be tested and the pressure gauge 31 when the pressurizing switch 41 is turned on; accordingly, when the pressure switch 41 is turned off, the gas pumped by the gas supply unit 10 can be stopped from flowing into the test piece m and the pressure gauge 31. Based on this, during the test, the pressurizing switch 41 can be turned on to enable the gas supply assembly 10 to supply gas to the test piece m to be tested and the pressure gauge 31, and after the gas supply assembly 10 supplies a proper amount of gas, the pressurizing switch 41 can be turned off to enable the gas supply assembly 10 to stop supplying gas to the test piece m to be tested and the pressure gauge 31, so that the air tightness test can be conveniently carried out.
Specifically, as shown in fig. 2, the pressurizing gun 40 includes a gun body 43 and the pressurizing switch 41, the gun body 43 is disposed on the first pipeline 21, a first channel 401 is formed in the gun body 43, and the pressurizing switch 41 is disposed at the first channel 401. The pressurizing switch 41 is configured to open the first channel 401 when being turned on, so that the first channel 401 and the first pipeline 21 are communicated, and the gas pumped by the gas feeding assembly 10 can be fed into the piece m to be tested and the pressure gauge 31 through the first pipeline 21; and, the pressurizing switch 41 is further configured to close the first channel 401 when closed, so that the first channel 401 is isolated from the first pipe 21, the first pipe 21 is closed, and the gas feeding unit 10 stops feeding the gas into the test piece m and the pressure gauge 31.
In one embodiment, referring to FIG. 1, the pressurizing gun 40 has a release switch 42, and the release switch 42 and the pressurizing switch 41 can be selectively turned on. The pressurizing gun 40 is configured to: when the air release switch 42 is turned on and the pressurizing switch 41 is turned off, the gas of the pressure gauge 31 and the test piece m to be tested is released; it will be appreciated that when the release switch 42 is open and the pressure switch 41 is closed, the gas in the test piece m and the pressure gauge 31 can enter the pressure gun 40 through the first pipe 21 and be released.
In the arrangement, during testing, the pressurizing switch 41 is turned on, the gas supply component 10 pumps gas to the tested piece m and the pressure gauge 31, and after the gas supply component 10 pumps a proper amount of gas, the pressurizing switch 41 is turned off; after the pressure gauge 31 completes the airtightness test of the test piece m to be tested, the air release switch 42 is turned on so that the gas in the pressure gauge 31 and the test piece m to be tested is released.
Specifically, the gun body 43 also has a second passage 402 therein, and the air release switch 42 is disposed at the second passage 402. After the test is completed, the pressurizing switch 41 is closed, the air release switch 42 is opened, and the second passage 402 is communicated with the first pipeline 21 and the outside, so that the gas in the test piece m and the pressure gauge 31 can be released to the outside through the second passage 402. During testing, the pressurizing switch 41 is turned on, so that the gas pressurized by the gas supply assembly 10 is introduced into the piece m to be tested and the pressure gauge 31 through the first channel 401, and the gas release switch 42 is turned off, so that the gas pressurized by the gas supply assembly 10 can be prevented from being released through the second channel 402.
Wherein, the pressure switch 41 and the air release switch 42 can be selected as a stop valve.
In one embodiment, referring to fig. 2, the muffler 44 is disposed at the release switch 42, that is, the muffler 44 is disposed at the second channel 402, so that when the gas in the test piece m and the pressure gauge 31 is released through the second channel 402, the sound of the gas release can be reduced.
In one embodiment, referring to fig. 2, the first pipe 21 is provided with a flow meter 50, and the flow rate of the gas pumped by the gas feeding assembly 10 can be obtained through the flow meter 50.
It should be noted that, before the air tightness test is performed, the approximate volume of the inside of the test piece m is known, so that the preset flow range can be set according to the approximate volume of the test piece m; because the flow meter 50 is arranged on the first pipeline 21, when the gas supply assembly 10 pumps gas, the flow data acquired by the flow meter 50 will be increased all the time, and when the data of the flow meter 50 exceeds the preset flow range and the test piece m is not filled with the gas pumped by the gas supply assembly 10, it can be said that the gas supply assembly 10 has pumped too much gas, so that it can be said that the degree of gas leakage of the test piece m is large, based on this, the situation of the substantial gas tightness of the test piece m can be known before the pressure gauge 31 acquires the pressure value, that is, the gas tightness of the test piece m can be substantially monitored by the arrangement of the flow meter 50.
Specifically, as shown in fig. 1 and 2, the first pipe 21 includes a first pipe section 211 and a second pipe section 212, a first end of the first pipe section 211 is connected to the gas outlet end of the gas supply assembly 10, a second end of the second pipe section 212 is connected to a first end of the second pipe 22 and a first end of the third pipe 23, and the gun body 43 of the pressurization gun 40 is disposed between the second end of the first pipe section 211 and the first end of the second pipe section 212.
Alternatively, as shown in fig. 2, in the present embodiment, the flow meter 50 is disposed in the second pipe section 212, and based on this, the gas at the flow rate measured by the flow meter 50 is the gas introduced into the piece m to be measured and the pressure gauge 31, without considering the condition that the gas in the first pipeline 21 is introduced into the second channel 402, so that the measurement accuracy of the flow meter 50 can be improved.
In one embodiment, referring to fig. 2, the first pipeline 21 is provided with a water-gas separator 60. Due to the arrangement, the gas pumped to the first pipeline 21 by the gas feeding assembly 10 can be subjected to water-gas separation by the water-gas separator 60, so that on one hand, the drying degree of the gas introduced into the piece m to be tested can be improved, and the moisture in the piece m to be tested can be prevented; on the other hand, can prevent that moisture from letting in the pressure gauge 31, and then avoid the moisture that lets in and the liquid in the pressure gauge 31 to appear mixing and lead to the unsafe condition of data of pressure gauge 31, so help improving the test accuracy of waiting to test piece m.
Alternatively, as shown in fig. 2, the moisture separator 60 is disposed at the first pipe section 211, so that the moisture separation effect of the gas pumped by the gas feeding assembly 10 can be achieved as soon as possible, thereby reducing the moisture in the pipe assembly 20 as much as possible.
In one embodiment, referring to fig. 1, the first pipeline 21 is provided with a pressure regulating valve 80, and the pressure of the gas pumped by the gas feeding assembly 10 can be regulated by the pressure regulating valve 80.
And/or, the first pipeline 21 is provided with a speed regulating valve 70, and the speed of the gas pumped by the gas feeding component 10 in the first pipeline 21 can be realized through the speed regulating valve 70.
So set up, the flexibility of the gas tightness testing arrangement of being convenient for is used.
The positions of the pressure regulating valve 80, the speed regulating valve 70, the water-gas separator 60, the pressurizing gun 40 and the flow meter 50 can be set according to actual use requirements.
In one embodiment, referring to fig. 2, the gas supply assembly 10 includes a gas tank 11 and an air compressor 12, a first end of the first pipeline 21 is connected to a gas outlet end of the gas tank 11, the gas tank 11 is used for storing gas, and the air compressor 12 is disposed in the gas tank 11 and configured to pump the gas in the gas tank 11. In this way, during the test, the air compressor 12 can be started to pump the gas in the gas storage tank 11 to the first pipeline 21, so that the gas is introduced into the piece m to be tested and the pressure gauge 31. The air compressor 12 is an air compressor.
Specifically, a first end of the first pipe segment 211 is connected to an air outlet end of the air storage tank 11.
Example two
The difference between this embodiment and the first embodiment is:
in the present embodiment, the first end of the third pipe 23 is configured to connect to the test piece m, not to connect to the second end of the first pipe 21. Based on this, during the test, on the basis that the to-be-tested piece m needs to be connected to the second end of the second pipeline 22, a ventilation interface needs to be arranged on the to-be-tested piece m, and the first end of the third pipeline 23 is connected with the ventilation interface, so that the gas pumped by the gas supply assembly 10 can be introduced into the to-be-tested piece m through the first pipeline 21 and the second pipeline 22 in sequence, and the gas in the to-be-tested piece m can be introduced into the pressure gauge 31 through the ventilation interface and the third pipeline 23 in sequence, so that the pressure gauge 31 can obtain the gas pressure condition of the to-be-tested piece m through the liquid level position in the pressure gauge 31, and after the gas supply assembly 10 stops pumping the gas for a preset interval time, if the to-be-tested piece m leaks, the liquid level position in the pressure gauge 31 can also change to reflect the gas tightness condition of the to-tested piece m.
It should be added that, in this embodiment, during testing, a ventilation interface needs to be provided on the test piece m to be tested, on one hand, a procedure of setting the test piece m to be tested is added, and thus difficulty and cost of testing work are increased; on the other hand, the provision of the vent interface may increase the risk of air leakage from the piece m to be tested. Therefore, the first embodiment is a preferred embodiment compared to the second embodiment, and certainly, the test can be performed on two test pieces m to be tested by using the first embodiment without considering the above-mentioned test difficulty, cost and risk.
The rest of this embodiment is the same as the first embodiment, and the unexplained features in this embodiment are explained by the first embodiment, which is not described herein again.
The above description is only a preferred embodiment of the present application and should not be taken as limiting the present application, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
1. An airtightness testing apparatus comprising:
a gas delivery assembly configured to deliver gas under pressure;
the pipeline assembly comprises a first pipeline, a second pipeline and a third pipeline; the first end of the first pipeline is connected with the air outlet end of the air supply assembly, and the second pipeline is connected with the second end of the first pipeline and is used for connecting a piece to be tested; the third pipeline is connected with the second end of the first pipeline or is configured to be connected with the piece to be tested;
the testing assembly comprises a pressure gauge, and the pressure gauge is a U-shaped pipe; the pressure gauge is provided with a first air hole communicated with the third pipeline and a second air hole communicated with the outside, and the first air hole and the second air hole are respectively formed in two opposite ends of the pressure gauge; the pressure gauge is configured to acquire a pressure value through a liquid level position in the pressure gauge, and is configured to acquire the pressure value before and after a preset interval time, respectively, so as to acquire a pressure difference of the piece to be tested.
2. The airtightness testing apparatus according to claim 1, wherein the pressure gauge includes first and second sections which are spaced apart, and a connecting section which is connected between the first and second sections; the first air hole is formed in the first section, the second air hole is formed in the second section, and the pressure gauge is configured to obtain a pressure value through the liquid level position of the first section and/or the second section; the test assembly further includes a scale positioned between the first section and the second section.
3. The apparatus for testing the hermeticity of claim 1 wherein the test assembly further comprises a housing defining a first port and a second port; the pressure gauge is arranged in the shell, the first air hole is communicated with the first interface, and the first interface is also communicated with the third pipeline; the second air hole is communicated with the second interface, and the second interface is also communicated with the outside.
4. The apparatus according to claim 1, further comprising a pressurization gun disposed on the first pipeline, the pressurization gun having a pressurization switch, the pressurization gun configured to allow a gas pressurized by the gas supply assembly to pass therethrough when the pressurization switch is turned on.
5. The airtightness testing apparatus according to claim 4, wherein said pressurizing gun has a release switch, and said release switch and said pressurizing switch are selectively turned on; the pressurization gun is configured to: when the air release switch is turned on and the pressurizing switch is turned off, the gas of the pressure gauge and the piece to be tested is released.
6. The airtightness testing apparatus according to claim 5, wherein a muffler is provided at said air release switch.
7. The tightness testing device according to any one of claims 1 to 6, wherein the first pipe is provided with a flow meter.
8. The tightness test device according to any one of claims 1 to 6, wherein said first line is provided with a moisture separator.
9. The tightness testing device according to any one of claims 1 to 6, wherein said first line is provided with a speed regulating valve and/or a pressure regulating valve.
10. The airtightness testing apparatus according to any one of claims 1 to 6, wherein the gas supply assembly includes a gas tank and an air compressor, the first end of the first pipeline is connected to the gas outlet end of the gas tank, and the air compressor is disposed in the gas tank and configured to pressure-feed the gas in the gas tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221343664.4U CN217520688U (en) | 2022-05-30 | 2022-05-30 | Air tightness testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221343664.4U CN217520688U (en) | 2022-05-30 | 2022-05-30 | Air tightness testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217520688U true CN217520688U (en) | 2022-09-30 |
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| CN202221343664.4U Active CN217520688U (en) | 2022-05-30 | 2022-05-30 | Air tightness testing device |
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