CN216899490U - Air tightness testing device - Google Patents
Air tightness testing device Download PDFInfo
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- CN216899490U CN216899490U CN202123225883.0U CN202123225883U CN216899490U CN 216899490 U CN216899490 U CN 216899490U CN 202123225883 U CN202123225883 U CN 202123225883U CN 216899490 U CN216899490 U CN 216899490U
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Abstract
The utility model discloses an air tightness testing device which comprises a base, wherein a detection chamber and a mounting groove are arranged in the base, one end of the detection chamber is communicated with the mounting groove, and the other end of the detection chamber is communicated with detection equipment; a sealing element is arranged in the mounting groove, and the distance between the sealing element and the detection chamber is adjustable to form a space for accommodating a workpiece to be detected; a gas channel corresponding to the position of the detection chamber is arranged in the sealing element; the device also comprises a force application mechanism for applying pressure to the bonding position of the workpiece to be detected, and the force application point of the force application mechanism is positioned in the gas channel. The utility model can simulate the stress condition and the temperature condition of the bonding piece in the practical application environment, fully considers the influence of stress and temperature on the air tightness of the bonding agent and ensures the accuracy of the air tightness test result.
Description
Technical Field
The utility model belongs to the technical field of air tightness detection, and particularly relates to an air tightness testing device
Background
The adhesive bonding technology is a connecting technology, and compared with the traditional welding, riveting and other technologies, the adhesive bonding technology has the advantages that the quality of a connecting body can be obviously reduced, the connecting strength is improved, components made of different materials can be connected, and the like.
The adhesive surface can be completely sealed, and has flat and smooth surface and good aerodynamic performance. The air tightness test of the adhesive is an important index for evaluating the adhesive piece.
In actual use, most of bonding pieces work under the action of a certain force, so that the working state of the bonding agent can be better reflected only by evaluating the air tightness of the bonding agent under the action of a certain force, and the air tightness evaluation capable of simulating the working performance of the bonding agent is obtained.
Meanwhile, part of the bonding piece needs to work at a certain temperature, so the influence of the temperature on the air tightness sometimes needs to be considered when the air tightness of the bonding agent is evaluated, but at present, no device and method capable of evaluating the air tightness of the bonding agent bonding piece under the action of certain temperature and pressure exist.
SUMMERY OF THE UTILITY MODEL
In order to solve the defects of the prior art, the utility model discloses a binder airtightness testing device for a bonding piece, and specifically discloses the following technical scheme:
an air tightness testing device comprises a base, wherein a detection chamber and a mounting groove are arranged in the base,
one end of the detection chamber is communicated with the mounting groove, and the other end of the detection chamber is communicated with detection equipment;
a sealing element is arranged in the mounting groove, and the distance between the sealing element and the detection chamber is adjustable to form a space for accommodating a workpiece to be detected;
a gas channel corresponding to the position of the detection chamber is arranged in the sealing element;
the device also comprises a force application mechanism for applying pressure to the bonding position of the workpiece to be detected, and the force application point of the force application mechanism is positioned in the gas channel.
Furthermore, still include the casing, the casing is heat preservation material and is equipped with the heating member in the casing, the base is located the casing.
Furthermore, the force application mechanism comprises a force application rod, a positioning piece is further arranged between the force application rod and the sealing piece, and the gas channel is arranged in the positioning piece.
Further, in the above-mentioned case,
the shell is provided with a first channel, and one end of the force application rod penetrates through the first channel and extends to the outer side of the shell and is connected with force application equipment.
Furthermore, a second channel is arranged on the shell and connected with the detection equipment.
Further, in the above-mentioned case,
also comprises a first cooling part and a second cooling part which are arranged outside the shell,
the first cooling part is provided with a third channel communicated with the first channel, and the force application rod penetrates through the first channel and the third channel to be connected with force application equipment;
and a fourth channel communicated with the second channel is arranged on the second cooling part, and the fourth channel is connected with the detection equipment.
Furthermore, a cooling liquid inlet and a cooling liquid outlet are formed in the first cooling part and the second cooling part respectively.
Further, the shell is a non-closed shell.
Further, the detection device is a pressing device or a vacuum pump.
Further, the bottom of the shell is also provided with a base.
By adopting the scheme, the utility model has the beneficial effects that:
according to the utility model, the force applying mechanism is used for applying pressure to the bonding piece, so that the stress condition of the bonding piece in an actual application environment can be simulated, the influence of stress on the air tightness of the bonding agent is fully considered, and the accuracy of an air tightness test result is ensured;
the heating body heats the environment in the shell, so that the temperature condition in the practical application environment of the adhesive can be simulated, and the influence of temperature factors on the performance of the adhesive is fully considered;
the utility model can also test the critical temperature and critical stress which can be born by the adhesive, provides reference for the use condition of the adhesive piece, and avoids the damage of the air tightness of the adhesive caused by overhigh temperature or overlarge stress in the actual use process.
Drawings
FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present invention
FIG. 2 is a schematic view of a ring-shaped adhesive member
FIG. 3 is a schematic view of a sealing member according to an embodiment of the present invention
FIG. 4 is a top view of the seal of FIG. 3
FIG. 5 is a schematic view of a positioning element according to an embodiment of the present invention
The device comprises a shell, a force application rod, a sealing element, a base, a mounting groove, a detection chamber, a detection device, a bonding agent, a positioning element, a gas channel, a first channel, a force application device, a second channel, a heating body, a first cooling part, a second cooling part, a third channel, a fourth channel, a base and a thread, wherein the shell is 1-the shell, the force application rod is 2-the sealing element is 3-the base is 4-the mounting groove is 5-the mounting groove is 6-the detection chamber is 7-the detection device, the bonding agent is 8-the positioning element is 9-the gas channel is 10-the first channel is 12-the force application device is 13-the second channel is 14-the heating body is 15-the first cooling part, the second cooling part is 16-the third channel is 17-the fourth channel is 18-the base is 19-the thread.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The bonding piece is an assembly bonded by a bonding agent, a structural schematic diagram of an annular bonding piece is shown in fig. 5, the piece A and the piece B are bonded together by the bonding agent 8 in the middle, the air tightness of the bonding agent 8 on the bonding piece is an important factor influencing the performance of the bonding piece, and in order to detect the air tightness of the bonding agent 8 in a working environment, the utility model discloses an air tightness testing device.
As shown in fig. 1 to 4, the air tightness testing device of the present invention includes a base 4, a detection chamber 6 and an installation groove 5 are arranged in the base 4, one end of the detection chamber 6 is communicated with the installation groove 5, the other end is communicated with a detection device 7, the detection device 7 can be a pressurizing device or a vacuum pump, and is used for pressurizing or vacuumizing the detection chamber 6;
be equipped with sealing member 4 in mounting groove 5, sealing member 4 forms with the adjustable space that is used for holding the work piece of waiting to examine with the distance that detects room 6, wait to examine the work piece and be bonding piece promptly, sealing member 4 is used for waiting to examine the work piece sealed in mounting groove 5, prevents to detect room 6 and external atmospheric pressure intercommunication.
A gas channel corresponding to the position of the detection chamber 6 is arranged in the sealing element 4; the correspondence here means that a gas passage is located above the detection chamber 6, and the detection chamber 6 can communicate with the gas passage when the adhesive on the workpiece to be inspected is broken.
The testing device further comprises a force application mechanism for applying pressure to the bonding position of the workpiece to be tested, and the force application point of the force application mechanism is located in the gas channel. The method is characterized in that the pressure is applied to the bonding position of the workpiece to be tested indirectly, and in the testing process, the force application mechanism directly applies stress to the workpiece to be tested, as shown in fig. 1, the force application mechanism applies the stress to a part A, so that the stress applied to two sides of the bonding position is different, the bonding position is indirectly pressed, and the influence of the stress difference acting on the workpieces at two ends of the bonding agent in the actual environment on the air tightness of the bonding agent is simulated.
The test principle of the utility model is as follows: when waiting to examine the work piece and arranging in mounting groove 5, 8 one sides of the binder on the work piece of examining communicate with the external world, the opposite side and detection room 6 intercommunication, the purpose makes the pressure of 8 one sides of binder be atmospheric pressure all the time, and the opposite side is the atmospheric pressure or the vacuum environment that check out test set 7 provided, and when 8 gas leakage of binder, atmospheric pressure or the vacuum environment in the detection room 6 will change, so can be through detecting atmospheric pressure value or the vacuum in the detection room 6, test the gas tightness of binder.
Will wait to examine the work piece and arrange in mounting groove 5 bottom during the test, then connect sealing member 3 in waiting to examine the mounting groove 5 of work piece top, the purpose is the sealed edge of waiting to examine the work piece, prevent external environment through waiting to examine work piece edge and detection room 6 intercommunication, and then influence the atmospheric pressure value or the vacuum in the detection room 6, sealing member 3 still is used for waiting to examine the work piece and fixes in mounting groove 5 simultaneously, application of force mechanism locates in the gas passage of sealing member 3, be used for giving the work piece pressure of examining, exert the stress on waiting to examine the work piece in the simulation application environment, as shown in figure 1, after waiting to examine the work piece after the installation, give the work piece of examining (piece A) and exert pressure through application of force mechanism, then suppress or the evacuation for detection room 6 through detection equipment 7, whether pressure or vacuum change in the detection room 6, detect the gas tightness of waiting to examine the work piece.
The mounting groove 5 may be provided as a cylindrical recess and the corresponding sealing member 3 may be provided as a circular ring (as shown in fig. 2), and the sealing member 3 may be provided with a thread 20 for connection with the mounting groove 5.
In an embodiment of the present invention, the air tightness testing device further includes a housing 1, the housing 1 is made of a heat insulating material, a heating body 14 is disposed in the housing 1, the base 4 is located in the housing 1, and a part of the bonding members needs to operate at a certain temperature, so that an application temperature needs to be further simulated to accurately test the air tightness of the bonding agent, the heating body 14 is used to provide a temperature required for detection, and the housing 1 is made of a heat insulating material to prevent dissipation of the temperature.
In order to ensure that the pressure on the side of the adhesive 8 is always at atmospheric pressure, the housing 1 is preferably configured as a non-hermetic housing to ensure that the pressure in the housing is the same as atmospheric pressure.
In a preferred embodiment of the present invention, the force applying mechanism includes a force applying rod 2, a positioning member 9 is further disposed between the force applying rod 2 and the sealing member 3, a gas channel 10 is disposed in the positioning member 9, one end of the gas channel 10 is communicated with an adhesive 8 (which may be chamfered here), and the other end is communicated with the outside, and the positioning member 9 can ensure that the vertical position of the force applying rod 2 does not deviate or skew, thereby realizing the control of the stress direction.
In one embodiment of the present invention, a first channel 11 is provided on the housing 1, one end of the force application rod 2 extends to the outside of the housing 1 through the first channel 11 to be connected with the force application device 12, and the force application rod 2 extends out of the housing 1 to facilitate installation with the force application device 12; the housing 1 is provided with a second channel 13, the detection chamber 6 is communicated with the second channel 13, and the second channel 13 is arranged to facilitate the connection of the detection equipment outside the housing 1.
Further, the testing device also comprises a first cooling part 15 and a second cooling part 16 which are arranged outside the shell 1, a third channel 17 communicated with the first channel 11 is arranged on the first cooling part 15, and the force application rod 2 penetrates through the first channel 11 and the third channel 17 and then is connected with the force application equipment 12; the second cooling portion 16 is provided with a fourth passage 18 communicating with the second passage 13, and the fourth passage 18 is connected to the detection device 7. The first cooling part 15 and the second cooling part 16 function to cool and protect the exposed heat transfer part of the testing device.
Further, the first cooling portion 15 and the second cooling portion 16 may be cooled by water or other cooling liquid, and both the first cooling portion 15 and the second cooling portion 16 are provided with a cooling liquid inlet and a cooling liquid outlet (not shown in the figure), but of course, the first cooling portion 15 and the second cooling portion 16 may also be cooled by other cooling methods, which are not limited herein.
In an embodiment of the present invention, the detecting device 7 may be a pressurizing device or a vacuum pump, the force applying device 12 may also be a pressurizing device, the pressurizing device may select a gas source such as a high-pressure gas tank or a high-pressure pipeline, and may also be an air compressor or other pressurizing devices, which is not limited herein.
In one embodiment of the present invention, the bottom of the housing 1 is further provided with a base 19 to keep the overall structure stable.
The installation groove 5, the sealing element 3 and the positioning element 9 can be arranged according to the shape of the bonding element to be tested, and the circular installation groove 5, the annular sealing element 3 and the annular positioning element 9 are only exemplary and are not limited to the shapes of the installation groove 5, the sealing element 3 and the positioning element 9.
The method of use of the test device of the present invention will be described in detail below:
1. placing the bonding piece to be tested in the mounting groove 5, mounting the sealing element 3, the positioning element 9 and the force application rod 2, starting the force application equipment 12, applying pressure to the bonding piece according to preset pressure, and keeping the pressure for 5-10 min to stabilize the stress on the bonding piece, wherein the preset pressure is equal to the stress borne by the bonding piece in the actual application environment;
2. starting the detection equipment 7, pressurizing or vacuumizing for 5-10 min, and detecting whether the air pressure or vacuum in the detection chamber 6 is stable or not;
3. starting the first cooling part 15, the second cooling part 16 and the heating body 14, increasing the temperature to a preset temperature according to the heating rate of 1-5 ℃/min, observing the air pressure or vacuum state after the preset temperature is reached, and recording the air tightness keeping time, wherein the preset temperature is equal to the temperature of the bonding piece in the practical application environment;
4. if the airtightness is kept for 10-30 min, the bonding agent can keep the airtightness in an application environment, and in addition, a destructive test can be further carried out to research the critical temperature and critical stress of the airtightness keeping of the bonding agent;
(1) keeping the stress applied on the adhesive 8 by the force application rod 2 and the pressure or vacuum state in the detection chamber 6 unchanged, continuously heating at a heating rate of 1-5 ℃/min, observing the air pressure or vacuum state, and recording the critical temperature of air tightness failure.
(2) The temperature and the pressure or vacuum state in the detection chamber 6 were kept constant, the air pressure or vacuum state was observed, and the critical pressure for the airtight failure was recorded.
By testing the critical temperature and the critical stress which can be born by the adhesive, reference is provided for the use condition of the adhesive piece, and the damage of the air tightness of the adhesive caused by overhigh temperature or overlarge stress in the actual use process is avoided.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art may still make modifications to the technical solutions described in the foregoing embodiments, or may substitute some or all of the technical features; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (10)
1. The utility model provides an air tightness testing device which characterized in that: comprises a base, a detection chamber and a mounting groove are arranged in the base,
one end of the detection chamber is communicated with the mounting groove, and the other end of the detection chamber is communicated with detection equipment;
a sealing element is arranged in the mounting groove, and the distance between the sealing element and the detection chamber is adjustable to form a space for accommodating a workpiece to be detected;
a gas channel corresponding to the position of the detection chamber is arranged in the sealing element;
the device also comprises a force application mechanism for applying pressure to the bonding position of the workpiece to be detected, and the force application point of the force application mechanism is positioned in the gas channel.
2. The airtightness testing apparatus according to claim 1, wherein: still include the casing, the casing is heat preservation material and is equipped with the heating member in the casing, the base is located the casing.
3. The airtightness testing apparatus according to claim 2, wherein: the force application mechanism comprises a force application rod, a positioning piece is further arranged between the force application rod and the sealing piece, and the gas channel is arranged in the positioning piece.
4. The airtightness testing apparatus according to claim 3, wherein:
the shell is provided with a first channel, and one end of the force application rod penetrates through the first channel and extends to the outer side of the shell and is connected with force application equipment.
5. The airtightness testing apparatus according to claim 2, wherein: and a second channel is arranged on the shell and is connected with the detection equipment.
6. The airtightness testing apparatus according to claim 3, wherein:
also comprises a first cooling part and a second cooling part which are arranged outside the shell,
the first cooling part is provided with a third channel communicated with the first channel, and the force application rod passes through the first channel and the third channel to be connected with force application equipment;
and a fourth channel communicated with the second channel is arranged on the second cooling part, and the fourth channel is connected with the detection equipment.
7. The airtightness testing apparatus according to claim 6, wherein: and the first cooling part and the second cooling part are both provided with a cooling liquid inlet and a cooling liquid outlet.
8. The airtightness testing apparatus according to claim 2, wherein: the shell is a non-closed shell.
9. The airtightness testing apparatus according to claim 1, wherein the detection device is a pressurizing device or a vacuum pump.
10. The airtightness testing apparatus according to claim 2, wherein: the bottom of the shell is also provided with a base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123225883.0U CN216899490U (en) | 2021-12-21 | 2021-12-21 | Air tightness testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123225883.0U CN216899490U (en) | 2021-12-21 | 2021-12-21 | Air tightness testing device |
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| Publication Number | Publication Date |
|---|---|
| CN216899490U true CN216899490U (en) | 2022-07-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202123225883.0U Active CN216899490U (en) | 2021-12-21 | 2021-12-21 | Air tightness testing device |
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| CN (1) | CN216899490U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116973038A (en) * | 2023-09-25 | 2023-10-31 | 爱德曼氢能源装备有限公司 | Testing device for parts of fuel cell system |
-
2021
- 2021-12-21 CN CN202123225883.0U patent/CN216899490U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116973038A (en) * | 2023-09-25 | 2023-10-31 | 爱德曼氢能源装备有限公司 | Testing device for parts of fuel cell system |
| CN116973038B (en) * | 2023-09-25 | 2024-01-02 | 爱德曼氢能源装备有限公司 | Testing device for parts of fuel cell system |
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