CN217442791U

CN217442791U - Air tightness testing device

Info

Publication number: CN217442791U
Application number: CN202220799123.6U
Authority: CN
Inventors: 陈茁; 陈景胜
Original assignee: Guangzhou Jiadu Technology Software Development Co ltd; PCI Technology Group Co Ltd
Current assignee: Guangzhou Jiadu Technology Software Development Co ltd; PCI Technology Group Co Ltd
Priority date: 2022-04-07
Filing date: 2022-04-07
Publication date: 2022-09-16
Anticipated expiration: 2032-04-07

Abstract

The utility model relates to a test equipment technical field specifically discloses an air tightness testing device, include: a suction cup having an adsorption part for covering a test hole of a product and a connection part for communicating with a pipe; the barometer is provided with a collecting end which is communicated with the connecting part through a pipeline; the air pumping mechanism is provided with a pumping and exhausting part, the pumping and exhausting part is communicated with the collecting end and the connecting part through a pipeline, and the pumping and exhausting part can pump air between the product and the barometer; the first one-way valve is arranged in a pipeline between the pumping and discharging part and the collecting end and the connecting part and is used for limiting the gas from the pumping and discharging part to pass through; and the second one-way valve is arranged in the pipeline between the first one-way valve and the pumping part and is connected with the atmospheric environment, and the second one-way valve is used for limiting the gas from the atmospheric environment to pass through. Through setting up sucking disc, barometer, the mechanism of bleeding, first check valve and second check valve, the gas tightness testing arrangement of this application is small, simple structure, and it is long when with low costs and convenient operation can reduce the test.

Description

Air tightness testing device

Technical Field

The application relates to the technical field of test equipment, in particular to an air tightness test device.

Background

At present, in the production of products with air tightness requirements, air tightness tests are generally required to be carried out on produced finished products, and only products passing the air tightness tests can be put into the market for sale.

However, when the product is usually subjected to an air tightness test, a plurality of large-scale devices, such as a tester, an air storage tank, a pressure sensing device, a valve switch, a product sealing mold and the like, are required, so that the air tightness test device has the problems of large volume, high cost, inconvenience in use and long test time.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides an aim at: the utility model provides a gas tightness testing arrangement, it can solve among the prior art gas tightness testing equipment exist bulky, with high costs, use inconvenient, the long problem of test time.

In order to achieve the purpose, the following technical scheme is adopted in the application:

provided is a airtightness testing apparatus including:

a suction cup having an adsorption part for covering a test hole of a product and a connection part for communicating with a pipe;

the barometer is provided with a collecting end which is communicated with the connecting part through the pipeline;

the air pumping mechanism is provided with an air pumping and exhausting part, the air pumping and exhausting part is communicated with the collecting end and the connecting part through the pipeline, and the air pumping and exhausting part can pump the air between the product and the barometer;

a first one-way valve disposed in the conduit between the pumping section and the collection end and the connection section, the first one-way valve for restricting the passage of gas from the pumping section and allowing the passage of gas from the product and the barometer;

and a second check valve disposed in the pipe between the first check valve and the pumping part and connected to an atmospheric environment, the second check valve being configured to restrict passage of gas from the atmospheric environment and to allow passage of gas from the pumping mechanism.

As a preferable embodiment of the airtightness testing apparatus, the apparatus further comprises:

the barometer with the air exhaust mechanism is fixedly arranged on the frame.

As an optimal scheme of the air tightness testing device, the rack is provided with a first fixing block and a second fixing block, the barometer is detachably connected with the first fixing block, and the air exhaust mechanism is detachably connected with the second fixing block.

As a preferable aspect of the airtightness testing apparatus, the frame is provided with a reel for winding and housing the pipe.

As a preferable scheme of the air tightness testing device, the bottom of the machine frame is provided with universal wheels.

As a preferable scheme of the air tightness testing device, the machine frame is provided with a connecting sleeve, and the connecting sleeve is used for sleeving and connecting the product.

As a preferable embodiment of the air tightness testing device, the air tightness testing device further comprises:

and the adhesive sticker is adhered to the surface of the product where the test hole is located, and is adhered to the adsorption part.

As a preferable embodiment of the airtightness testing apparatus, the suction cup is made of silicone or rubber.

As a preferable embodiment of the airtightness testing apparatus, the pipe is made of silica gel, polyurethane, or polyvinyl chloride.

As a preferable scheme of the air tightness testing device, the air exhaust mechanism is a needle cylinder or an air pump.

The beneficial effect of this application does:

the test hole of product is covered through the absorption portion of sucking disc, and the one end of pipeline is connected to the connecting portion of rethread sucking disc, can be with test hole and pipeline intercommunication. The other end of the pipeline is communicated to the collecting end of the barometer, and the barometer can detect the relative air pressure of the interior of the product relative to the atmospheric environment. The pumping and exhausting part of the pumping and exhausting mechanism is communicated with the collecting end and the connecting part through a pipeline, air pressure in the product is reduced through pumping air in the pipeline, namely relative air pressure is increased, if the pumping is stopped, the relative air pressure is unchanged within a certain time, the product can be considered to pass through an air tightness test, and otherwise the product does not pass through the air tightness test.

In addition, set up first check valve in the pipeline between pump drainage portion and collection end and connecting portion to pipeline between first check valve and pump drainage portion is provided with the second check valve, can restrict the gas that comes from pump drainage portion through first check valve and get into inside the product and influence the relative atmospheric pressure after the product stops bleeding, can also discharge the gas in the mechanism of bleeding to atmospheric environment through the second check valve, make the mechanism of bleeding can continue to pump and discharge the gas that comes from the product inside, can reduce the volume of the cylinder of the mechanism of bleeding.

Therefore, the air tightness testing device is small in size, simple in structure, low in cost, convenient to operate and capable of shortening testing time.

Drawings

The present application will be described in further detail below with reference to the accompanying drawings and examples.

Fig. 1 is a schematic structural diagram of a hermeticity testing apparatus and a product according to an embodiment of the present disclosure.

Fig. 2 is a schematic structural diagram of a suction cup and a pipe according to an embodiment of the present disclosure.

In the figure:

1. an air tightness testing device; 10. a pipeline; 11. a suction cup; 111. an adsorption part; 112. a connecting portion; 12. a barometer; 121. a collection end; 13. an air extraction mechanism; 131. a pumping and discharging part; 14. a first check valve; 15. a second one-way valve; 16. a frame; 161. a first fixed block; 162. a second fixed block; 163. coiling; 164. a universal wheel; 165. connecting sleeves; 17. sticking with adhesive; 2. producing a product; 21. and (6) testing the holes.

Detailed Description

In order to make the technical problems solved, technical solutions adopted, and technical effects achieved by the present application clearer, the following describes technical solutions of embodiments of the present application in further detail, and it is obvious that the described embodiments are only a part of embodiments of the present application, but 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 application.

In the description of the present application, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; 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 invention can be understood in specific cases to those skilled in the art.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

As shown in fig. 1 and 2, the present embodiment provides a airtightness testing apparatus 1 including:

a suction cup 11 having a suction portion 111 for covering the test hole 21 of the product 2 and a connection portion 112 communicating with the duct 10;

the barometer 12 is provided with a collecting end 121, and the collecting end 121 is communicated with the connecting part 112 through the pipeline 10;

an air suction mechanism 13 having a suction and discharge part 131, the suction and discharge part 131 communicating the collection end 121 and the connection part 112 through the pipe 10, the suction and discharge part 131 being capable of sucking air between the product 2 and the barometer 12;

a first check valve 14 disposed in the pipe 10 between the pumping part 131 and the collecting end 121 and the connection part 112, the first check valve 14 for restricting the passage of gas from the pumping part 131 and allowing the passage of gas from the product 2 and the barometer 12;

and a second check valve 15 disposed in the duct 10 between the first check valve 14 and the pumping part 131 and connected to the atmosphere, the second check valve 15 restricting the passage of gas from the atmosphere and allowing the passage of gas from the pumping mechanism 13.

This application covers the test hole 21 of product 2 through the absorption portion 111 of sucking disc 11, and the one end of pipeline 10 is connected to the connecting portion 112 of rethread sucking disc 11, can communicate test hole 21 and pipeline 10. The other end of the duct 10 is connected to the collecting end 121 of the barometer 12, and the relative air pressure inside the product 2 with respect to the atmosphere can be detected by the barometer 12. The pumping part 131 of the pumping mechanism 13 is communicated with the collecting end 121 and the connecting part 112 through the pipeline 10, and the air pressure in the product 2 is reduced by pumping the gas in the pipeline 10, that is, the relative air pressure is increased, if the pumping is stopped for a certain time, the product 2 can be considered to pass the air tightness test, otherwise, the product 2 does not pass the air tightness test.

In addition, the first one-way valve 14 is arranged in the pipeline 10 between the pumping part 131 and the collection end 121 and the connecting part 112, the second one-way valve 15 is arranged in the pipeline 10 between the first one-way valve 14 and the pumping part 131, the gas from the pumping part 131 can be limited to enter the product 2 through the first one-way valve 14 to influence the relative gas pressure after the pumping of the product 2 is stopped, and the gas in the pumping mechanism 13 can be exhausted to the atmosphere through the second one-way valve 15, so that the pumping mechanism 13 can continuously pump and exhaust the gas from the interior of the product 2, and the volume of a cylinder of the pumping mechanism 13 can be reduced.

The working principle of the tightness testing device 1 is described below in a specific pumping process:

since only the test hole 21 of the product 2 is communicated with the atmosphere, after the suction portion 111 of the suction cup 11 is aligned with the test hole 21, the suction cup 11 is pressed and the gas in the suction portion 111 is discharged, so that a closed space can be formed between the pipe 10, the barometer 12 and the first check valve 14 communicated with the connection portion 112 of the suction cup 11, and a negative pressure is formed between the suction cup 11 and the product 2 and is absorbed in the test hole 21. When the pumping part 131 of the pumping mechanism 13 pumps the gas in the pipe 10, the gas from the product 2 and the barometer 12 is collected at the first one-way valve 14 through the pipe 10 and passes through the first one-way valve 14 to reach the pumping part 131, and the gas in the atmospheric environment is blocked by the second one-way valve 15 and cannot enter the pumping mechanism 13, so that the gas from the product 2 and the barometer 12 is pumped into the cylinder of the pumping mechanism 13 by the pumping part 131, and at this time, the relative pressure value of the product 2 read by the barometer 12 relative to the atmospheric environment is increased.

When the gas pumped into the cylinder of the pumping mechanism 13 is exhausted through the pumping and exhausting part 131, the gas is blocked by the first check valve 14 after entering the pipeline 10 and cannot enter the product 2 and the barometer 12, and can only be exhausted to the atmosphere along the second check valve 15. By repeatedly sucking and discharging the gas in the cylinder by the air suction mechanism 13, the gas of the product 2 and the barometer 12 can be repeatedly sucked into the air suction mechanism 13 and discharged into the atmosphere, and the relative pressure value read by the barometer 12 is gradually increased along with the repeated suction by the air suction mechanism 13.

Because the suction cup 11, the pipeline 10 and the first one-way valve 14 can be kept airtight, after the air exhaust mechanism 13 stops exhausting air, if the reading of the barometer 12 is kept unchanged for a certain time, the air tightness test of the product 2 is passed, otherwise, the product does not pass.

Preferably, the target reading of the barometer 12 is set to 10kpa, that is, the target reading is equivalent to the pressure of placing the product 2 in the depth of one meter of water, and if the barometer 12 cannot reach 10kpa all the time or the reading decreases after reaching 10kpa in the process of repeatedly pumping the product 2 by the pumping mechanism 13, it indicates that the air tightness test of the product 2 does not pass.

Therefore, the air tightness testing device 1 is small in size, simple in structure, low in cost and convenient to operate, and long in testing time can be reduced.

In particular, the airtightness testing device 1 of the present application further includes a frame 16, the barometer 12 and the air pumping mechanism 13 are fixedly disposed on the frame 16, two hands can be released to fix the barometer 12 and the air pumping mechanism 13, and the barometer 12 and the air pumping mechanism 13 can be installed at any position of the frame 16, which is more convenient for lifting the barometer 12 and the air pumping mechanism 13 to a height convenient for an operator to use than placing the barometer 12 and the air pumping mechanism 13 on the ground.

Preferably, the frame 16 is provided with a first fixing block 161 and a second fixing block 162, and the first fixing block 161 can be detachably connected with the barometer 12, and the second fixing block 162 can be detachably connected with the air suction mechanism 13, so as to replace different barometers 12 and air suction mechanisms 13.

After the test is finished, the suction cup 11 and the pipeline 10 can be stacked on the rack 16, but the long and thin structure of the pipeline 10 is easy to be knotted after being stacked, so that the pipeline is inconvenient to use subsequently. In another preferred embodiment, a reel 163 may be provided on the rack 16, and after the test is completed, the pipeline 10 connected to the suction cup 11 may be wound around a reel of the reel 163 to wind the pipeline 10 using the reel 163, thereby reducing knotting and space occupation of the pipeline 10. The reel 163 may be rotatable, the suction cup 11 may be fixed to the reel 163, and the pipeline 10 connected to the suction cup 11 may be wound around the reel of the reel 163 by rotating the reel 163.

Still preferably, in order to improve the flexibility of the frame 16 during moving, a universal wheel 164 is disposed at the bottom of the frame 16, and the characteristic that the universal wheel 164 can change the advancing direction at will is utilized, so that the frame 16 can rotate to the corresponding advancing direction according to the difference of the force-receiving direction, so as to facilitate the moving and placing orientation of the frame 16.

In addition, in the air tightness test process, in order to prevent the product 2 from being far away from the rack 16, a connecting sleeve 165 can be arranged on the rack 16, the product 2 is sleeved by the connecting sleeve 165, the corresponding connection between the rack 16 and the product 2 is realized, the relative position relation between the product 2 and the rack 16 can be kept, and the sucking disc 11 can be used as a mark in the test after being separated from the test hole 21 carelessly, so that the product 2 is prevented from being tested in a leakage way.

Optionally, the airtightness testing apparatus 1 further includes a sticker 17, one end of the sticker 17 is attached to the surface of the product 2 where the test hole 21 is located, and when the adsorption portion 111 of the suction cup 11 aligns with the test hole 21, the other end of the sticker 17 is attached to the adsorption portion 111, so as to improve the connection strength between the adsorption portion 111 and the surface of the product 2. After the test is completed and the suction cup 11 is removed from the product 2, the adhesive tape 17 may be separated from the portion where the adsorption part 111 is adhered, and then the complete adhesive tape 17 is directly attached to the test hole 21 to close the product 2, so that the airtightness of the product 2 may be maintained.

In a preferred embodiment, the adhesive sticker 17 is a label sticker for the product 2, so that the label sticker can both close the test hole 21 of the product 2 and describe information corresponding to the product 2 on the surface of the product 2.

In addition, a waterproof layer can be arranged on the surface of the adhesive sticker 17 to prevent the adhesive sticker 17 from being damaged after being wetted and damaging the air tightness of the product 2. Specifically, the suction cup 11 is made of silicone or rubber, and the vacuum suction capability of the suction cup 11 can be provided by using the elasticity and the sealing property of the rubber or silicone.

As for the material of the pipe 10, specifically, the pipe 10 is made of silica gel, polyurethane or polyvinyl chloride, and also by utilizing the plasticity and the sealing property of silica gel, polyurethane or polyvinyl chloride, the pipe 10 with good sealing property can be made, maintaining the precision of the air tightness test.

For the implementation manner of the air pumping mechanism 13, optionally, the air pumping mechanism 13 is a syringe or an air pump, a piston cylinder of the syringe or the air pump is used as an air storage space during air pumping, and a piston rod is used as a power component for air pumping or air exhaust.

In particular, the air pump and the second check valve 15 are combined to form an inflator, that is, the second check valve 15 is arranged on the wall surface of the piston cylinder of the air pump, and the first check valve 14 and the second check valve 15 are both communicated with the piston cylinder of the air pump, so that the volume of the air tightness testing device 1 can be further reduced.

For example, when the piston rod of the pump is remote from the cylinder, air can only enter the cylinder from the product 2 and the barometer 12 through the conduit 10 from the first one-way valve 14, with the second one-way valve 15 restricting the entry of air from the atmosphere and the first one-way valve 14 allowing the entry of air from the product 2 and the barometer 12, and air is temporarily stored by the cylinder. At this time, the piston rod is moved close to the piston cylinder, and since the first check valve 14 limits the gas from entering the product 2 and the barometer 12, the gas temporarily stored in the piston cylinder enters the atmosphere through the second check valve 15. If the piston rod moves away from and close to the piston cylinder repeatedly, air from the product 2 and the barometer 12 can be discharged to the atmospheric environment repeatedly, air from the atmospheric environment is prevented from entering the product 2 and the barometer 12, and air tightness in the testing process can be guaranteed.

In the description herein, it is to be understood that the terms "upper," "lower," "left," "right," and the like are used in an orientation or positional relationship merely for convenience in description and simplicity of operation, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the present application. Furthermore, the terms "first" and "second" are used merely for descriptive purposes and are not intended to have any special meaning.

In the description herein, references to the description of "an embodiment," "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be appropriately combined to form other embodiments as will be appreciated by those skilled in the art.

The technical principles of the present application have been described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the present application and is not to be construed in any way as limiting the scope of the application. Based on the explanations herein, a person skilled in the art will be able to conceive of other embodiments of the present application without inventive effort, which shall fall within the scope of protection of the present application.

Claims

1. A tightness testing device (1), characterized in that it comprises:

a suction cup (11) having a suction portion (111) for covering a test hole (21) of a product (2) and a connection portion (112) for communicating with a duct (10);

a barometer (12) having a collection end (121), the collection end (121) communicating with the connection portion (112) through the conduit (10);

an air suction mechanism (13) having an evacuation portion (131), the evacuation portion (131) communicating the collection end (121) and the connection portion (112) through the duct (10), the evacuation portion (131) being capable of sucking air between the product (2) and the barometer (12);

a first one-way valve (14) arranged in the conduit (10) between the pumping section (131) and the collection end (121) and the connection section (112), the first one-way valve (14) being adapted to restrict the passage of gas from the pumping section (131) and to allow the passage of gas from the product (2) and the barometer (12);

a second check valve (15) disposed in the duct (10) between the first check valve (14) and the pumping part (131) and connected to an atmospheric environment, the second check valve (15) being configured to restrict passage of gas from the atmospheric environment and to allow passage of gas from the pumping mechanism (13);

and the adhesive tape (17) is attached to the surface of the product (2) where the test hole (21) is located, and the adhesive tape (17) is used for being adhered to the adsorption part (111).

2. The tightness test device (1) according to claim 1, characterized in that it further comprises:

the air gauge (12) and the air exhaust mechanism (13) are fixedly arranged on the frame (16).

3. The tightness testing device (1) according to claim 2, characterized in that said frame (16) is provided with a first fixed block (161) and a second fixed block (162), said barometer (12) being removably connected to said first fixed block (161), said suction mechanism (13) being removably connected to said second fixed block (162).

4. The tightness testing device (1) according to claim 2, characterized in that said frame (16) is provided with a reel (163), said reel (163) being intended to reel-receive said conduit (10).

5. The tightness testing device (1) according to claim 2, characterized in that the bottom of said frame (16) is provided with universal wheels (164).

6. The tightness testing device (1) according to claim 2, characterized in that said frame (16) is provided with a connecting sleeve (165), said connecting sleeve (165) being adapted to be sleeved with said product (2).

7. The tightness test device (1) according to any one of claims 1 to 6, characterized in that said suction cups (11) are made of silicone or rubber.

8. The tightness test device (1) according to any one of claims 1 to 6, characterized in that said duct (10) is made of silicone, polyurethane or polyvinyl chloride.

9. The tightness test device (1) according to any one of claims 1 to 6, characterized in that said suction mechanism (13) is a syringe or an air pump.