High-temperature air tightness detection device for sealing gasket

Abstract

The utility model belongs to the sealing gasket air tightness detection technical field, and discloses a sealing gasket high temperature air tightness detection apparatus comprising a movable disc, a plurality of air supply cylinders arranged on the bottom of the movable disc, a fixed disc arranged below the movable disc, a plurality of detection grooves arranged on the fixed disc and used for placing sealing gaskets, and the air supply cylinders are in one-to-one correspondence with the detection grooves. A heating plate is installed at the bottom of the detection groove, the side wall of the detection groove is communicated with an exhaust pipe, the end of the exhaust pipe extends into water, the movable disc moves downwards to drive the air supply cylinder to extend into the detection groove and press the sealing gasket downwards to be fixed in the detection groove, the air supply cylinder introduces air into the detection groove, and the air supply cylinder is connected with the movable disc; and gas penetrating through the sealing gasket is introduced into water through the exhaust pipe. According to the utility model, the plurality of detection grooves are arranged on the fixed disc, the airtightness of multiple batches of sealing gaskets can be detected at the same time, and after gas is introduced, if continuous bubbles emerge from one end, extending into water, of the exhaust pipe, the airtightness of the sealing gaskets is not qualified.

Description

Technical Field

[0001] This utility model relates to the field of gasket airtightness testing technology, specifically to a high-temperature gasket airtightness testing device. Background Technology

[0002] In the automotive industry, gaskets are mainly used for the connection between components such as the compressor and condenser in automotive air conditioning systems. During operation, the compressor produces high-temperature gas, which enters the condenser and cools into a liquid. The gasket needs to maintain its sealing effect in this high-temperature environment to ensure the normal operation of the air conditioning system.

[0003] To ensure the proper functioning of gaskets in high-temperature environments, their airtightness needs to be tested before use. Existing technology includes a high-temperature sealing tester for gaskets. This device connects to a computer. During use, the temperature inside the sealing chamber is raised to a preset test temperature. Once the preset temperature is reached, the tester automatically fills the gasket with a certain amount of gas. After filling, the instrument monitors the gas changes inside the gasket in real time and records the data on the display screen. The computer calculates the data and analyzes whether the gas difference is within a reasonable threshold, thereby determining whether the gasket's airtightness is good under high-temperature conditions.

[0004] In the existing technology, if multiple batches of gaskets need to be tested in batches, each gasket needs to be placed into the sealing tester and the sealing performance needs to be tested one by one. The airtightness test operation is cumbersome and the batch testing efficiency is low. Utility Model Content

[0005] Therefore, this utility model provides a high-temperature airtightness testing device for gaskets to solve the technical problem that when performing batch testing on multiple batches of gaskets, it is necessary to test the airtightness of each gasket individually, which is a cumbersome operation.

[0006] To solve the above-mentioned technical problems, this utility model specifically provides the following technical solution:

[0007] A high-temperature airtightness testing device for a sealing gasket includes a movable plate, a plurality of air supply cylinders installed at the bottom of the movable plate, and a fixed plate installed below the movable plate;

[0008] The fixed plate has several detection slots for placing the sealing gasket, and the air supply cylinder corresponds to each detection slot and opens towards one side of the detection slot.

[0009] A heating plate is installed at the bottom of the detection tank, and an exhaust pipe is connected to the side wall of the detection tank, with the end of the exhaust pipe extending into the water;

[0010] The movable disc moves downward, causing the air supply cylinder to extend into the detection groove and press the sealing gasket down to fix it in the detection groove. The air supply cylinder introduces gas into the detection groove, and the gas passing through the sealing gasket is introduced into the water through the exhaust pipe.

[0011] Furthermore,

[0012] The detection groove includes a first groove and a second groove arranged sequentially from top to bottom;

[0013] The heating plate is installed at the bottom of the second tank, and the radius of the first tank is greater than the radius of the second tank.

[0014] Furthermore,

[0015] The air supply cylinder is equipped with a sealing column inside, and the diameter of the sealing column is equal to the diameter of the hole on the sealing gasket.

[0016] Furthermore,

[0017] The air supply cylinder presses the sealing gasket against the opening of the second groove, the sealing post extends into the hole on the sealing gasket, the bottom surface of the sealing gasket completely covers the opening of the second groove, and the top surface of the sealing gasket completely covers the opening of the air supply cylinder.

[0018] The outer diameter of the air supply cylinder is larger than the inner diameter of the second trough.

[0019] Furthermore,

[0020] The side wall of the detection tank is provided with a through hole, which is connected to the exhaust pipe;

[0021] The end of the through hole faces the inside of the second groove.

[0022] Furthermore,

[0023] The bottom of the fixed plate is provided with a water pool, and the end of the exhaust pipe away from the through hole extends into the water pool.

[0024] Furthermore,

[0025] A miniature air pump is installed at the bottom of the movable plate, and the air outlet pipe of the miniature air pump is connected to the air supply cylinder.

[0026] Furthermore,

[0027] A disc support is provided above the movable disc, a drive cylinder is mounted on the disc support, a drive shaft is mounted at the end of the drive cylinder, and the end of the drive shaft is connected to the movable disc.

[0028] Compared with the prior art, this utility model has the following advantages:

[0029] This invention features multiple testing slots on a fixed plate, allowing simultaneous testing of the airtightness of multiple batches of sealing gaskets. During testing, the sealing gaskets are heated by a heating plate at the bottom of the testing slot. A movable plate moves downwards, causing an air supply cylinder to extend into the bottom of the testing slot. This provides a sealed heating environment for the sealing gaskets. Once the gaskets are heated to a preset temperature, gas is introduced into the testing slots via the air supply cylinder. If continuous bubbles emerge from the end of the exhaust pipe that is submerged in water, the sealing gasket's airtightness is unqualified. If a few bubbles or no bubbles emerge from the end of the exhaust pipe that is submerged in water, the sealing gasket's airtightness is good. This invention is simple to operate, suitable for simultaneous testing of multiple batches of sealing gaskets, and improves testing efficiency. Attached Figure Description

[0030] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0031] Figure 1 A schematic diagram of the overall structure of a high-temperature airtightness testing device for a sealing gasket provided in an embodiment of this utility model;

[0032] Figure 2 A front structural schematic diagram of a high-temperature airtightness testing device for a sealing gasket provided in an embodiment of this utility model;

[0033] Figure 3 This is a schematic diagram of the overall structure of the fixed plate and water tank in the embodiment of this utility model;

[0034] Figure 4 This is a top view of the fixed plate and water tank in an embodiment of the present utility model;

[0035] Figure 5 This is a schematic diagram of the overall structure of the air supply cylinder, the first tank, and the second tank in an embodiment of this utility model;

[0036] Figure 6 This is a schematic diagram of the structure of the air supply cylinder extending into the detection groove in an embodiment of this utility model.

[0037] The labels in the diagram represent the following:

[0038] 1-Disc bracket; 2-Fixed disc; 3-Detection groove; 4-Heating plate; 5-Exhaust pipe; 6-Moving disc; 7-Air supply cylinder; 8-Drive cylinder; 9-Drive shaft; 10-Water tank; 11-Miniature air pump; 12-First groove; 13-Second groove; 14-Sealing column. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0040] like Figure 1 and Figure 3 As shown, this utility model provides a high-temperature airtightness testing device for a sealing gasket, including a movable plate 6, a plurality of air supply cylinders 7 installed at the bottom of the movable plate 6, and a fixed plate 2 installed below the movable plate 6;

[0041] The fixed plate 2 has several detection slots 3 for placing the sealing gasket. The air supply cylinder 7 corresponds to each detection slot 3 and opens towards the side of the detection slot 3.

[0042] A heating plate 4 is installed at the bottom of the detection tank 3, and an exhaust pipe 5 is connected to the side wall of the detection tank 3, with the end of the exhaust pipe 5 extending into the water.

[0043] The movable disc 6 moves downward, causing the air supply cylinder 7 to extend into the detection groove 3 and press down and fix the sealing gasket in the detection groove 3. The air supply cylinder 7 introduces gas into the detection groove 3, and the gas passing through the sealing gasket is introduced into the water through the exhaust pipe 5.

[0044] This invention features multiple testing slots 3 on a fixed plate 2, allowing simultaneous testing of the airtightness of multiple batches of sealing gaskets. During testing, the sealing gasket is heated by a heating plate 4 at the bottom of the testing slot 3. The movable plate 6 moves downward, causing the air supply cylinder 7 to extend into the bottom of the testing slot 3. This provides a sealed heating environment for the sealing gasket. Furthermore, once the sealing gasket is heated to a preset temperature, the air supply cylinder 7 can introduce gas into the testing slot. If continuous bubbles emerge from the end of the exhaust pipe 5 that is submerged in water, the airtightness of the sealing gasket is unqualified. If a small number of bubbles or no bubbles emerge from the end of the exhaust pipe 5 that is submerged in water, the airtightness of the sealing gasket is good. This invention is simple to operate, suitable for simultaneous testing of multiple batches of sealing gaskets, and improves testing efficiency.

[0045] If the detection groove 3 is a common cylindrical groove, when the air supply cylinder 7 extends into the bottom of the detection groove 3, it will block the connection between the side wall of the detection groove 3 and the exhaust pipe 5, thus preventing the gas that has passed through the sealing gasket from being discharged. Therefore, the present invention makes the following design for the detection groove 3: the detection groove 3 includes a first groove 12 and a second groove 13 arranged sequentially from top to bottom.

[0046] The heating plate 4 is installed at the bottom of the second groove 13. The radius of the first groove 12 is larger than the radius of the second groove 13, and the depth of the second groove 13 is not very deep, so that the heating plate 4 can reach the preset temperature value when heating the sealing gasket, thereby ensuring the heating effect.

[0047] Furthermore, in order to facilitate the passage of gas through the sealing gasket into the exhaust pipe 5, a through hole is provided on the side wall of the test groove 3. The through hole is connected to the exhaust pipe 5, and the end of the through hole faces the inside of the second groove 13. That is to say, the through hole is located on the side wall of the second groove 13 between the heating plate 4 and the sealing gasket. When the gas supply cylinder 7 passes gas, if the airtightness of the sealing gasket is not up to standard, the gas will pass through the sealing gasket into the second groove 13. Since the second groove 13 has a through hole on its side wall, the gas enters the exhaust pipe 5 through the through hole.

[0048] like Figure 5 As shown, in actual use, in order to match the sealing equipment, the sealing gasket usually has small holes for pipes or other structures to pass through. When testing the air tightness, if gas passes through the small holes and enters the exhaust pipe 5, the air tightness of the sealing gasket cannot be verified. Therefore, in this utility model, a sealing column 14 is provided inside the air supply cylinder 7. The diameter of the sealing column 14 is equal to the diameter of the hole on the sealing gasket. When the air supply cylinder 7 is inserted into the bottom of the test groove 3, the sealing column 14 is directly aligned and inserted into the hole on the sealing gasket, blocking the hole, so that gas cannot pass through the hole. In actual operation, the sealing column 14 can be added, reduced or replaced according to the different sizes, quantities and positions of the holes to make the sealing column 14 fit the hole of the sealing gasket.

[0049] During the specific testing, the air supply cylinder 7 presses the sealing gasket against the opening of the second groove 13, and the sealing column 14 extends into the hole on the sealing gasket to block the hole. The bottom surface of the sealing gasket completely covers the opening of the second groove 13, and the top surface of the sealing gasket completely covers the opening of the air supply cylinder 7. The outer diameter of the air supply cylinder 7 is larger than the inner diameter of the second groove 13, so that the air supply cylinder 7 and the second groove 13 press and fix the sealing gasket. In general, the area of ​​the sealing gasket being tested needs to be larger than the area of ​​the opening of the second groove 13, so that the sealing gasket completely covers the opening of the second groove 13. The outer diameter of the air supply cylinder 7 is larger than the inner diameter of the second groove 13, so that when the air supply cylinder 7 is inserted into the testing groove 3, it can only actually reach the opening of the second groove 13. At this time, the air outlet of the air supply cylinder 7 is facing the sealing gasket.

[0050] Meanwhile, in actual testing, the specific shapes of the testing groove 3 and the air supply cylinder 7 can be set according to the shape of the sealing gasket to be tested, so that the bottom surface of the sealing gasket completely covers the groove opening of the second groove 13 and the top surface of the sealing gasket completely covers the opening of the air supply cylinder 7.

[0051] like Figure 6As shown, in order to facilitate the placement of the sealing gasket into the test groove 3, the air supply cylinder 7 needs to be designed as a structure that can move up and down. Therefore, a disc support 1 is set above the movable disc 6, and a drive cylinder 8 is installed on the disc support 1. A drive shaft 9 is installed at the end of the drive cylinder 8, and the end of the drive shaft 9 is connected to the movable disc 6. When it is necessary to introduce gas into the test groove 3, the drive cylinder 8 is turned on, and the drive shaft 9 is controlled to drive the movable disc 6 to move downward. When it is necessary to place the sealing gasket to be tested into the test groove 3, the drive shaft 9 is controlled to drive the movable disc 6 to move upward.

[0052] like Figure 2 As shown, since the air supply cylinder 7 itself cannot actively supply gas into the detection tank 3, it needs to be connected to other air supply devices to supply gas to the air supply cylinder 7. In order to facilitate the supply of gas into the air supply cylinder 7, a miniature air pump 11 is installed at the bottom of the movable plate 6. The air outlet pipe of the miniature air pump 11 is connected to the air supply cylinder 7. When it is necessary to supply gas into the detection tank 3, the miniature air pump 11 is turned on, and the air outlet pipe of the miniature air pump 11 supplies gas into the air supply cylinder 7.

[0053] like Figure 4 As shown, one end of the exhaust pipe 5 needs to be inserted into the water tank 10 to verify whether gas has passed through the sealing gasket. In order to facilitate the insertion of one end of the exhaust pipe 5 into the water, a water tank 10 is provided at the bottom of the fixed plate 2, and the end of the exhaust pipe 5 away from the through hole extends into the water tank 10.

[0054] It should be noted that, due to the different materials of the sealing gaskets, their high-temperature test temperature ranges are also different. For example, the temperature range for EPDM sealing gaskets is 90℃-150℃, and for nitrile rubber sealing gaskets it is 90℃-120℃. Therefore, the heating plate 4 can be adjusted to the test temperature corresponding to the material of the sealing gasket.

[0055] When in use, place the gasket to be tested into the test groove 3, control the movable plate 6 to move down and drive the air supply cylinder 7 into the test groove 3, so that the bottom of the air supply cylinder 7 fits with the gasket to form a sealed environment.

[0056] Turn on the heating plate 4 and adjust it to the temperature corresponding to the material of the sealing gasket. After the sealing gasket is heated to the preset temperature, turn on the micro air pump 11 to continuously supply gas to the air supply cylinder 7, and observe whether there are continuous bubbles at the end of the exhaust pipe 5 in the water tank 10, so as to determine whether the airtightness of the sealing gasket is good.

[0057] The above embodiments are merely exemplary embodiments of this application and are not intended to limit this application. The scope of protection of this application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this application within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this application.

Claims

1. A high-temperature airtightness testing device for a sealing gasket, characterized in that, Includes a movable plate (6), with several air supply cylinders (7) installed at the bottom of the movable plate (6), and a fixed plate (2) installed below the movable plate (6); The fixed plate (2) is provided with a number of detection slots (3) for placing the sealing gasket. The air supply cylinder (7) corresponds to the detection slots (3) one by one and opens towards the side of the detection slots (3). A heating plate (4) is installed at the bottom of the detection tank (3), and an exhaust pipe (5) is connected to the side wall of the detection tank (3), with the end of the exhaust pipe (5) extending into the water; The movable disc (6) moves downward, causing the air supply cylinder (7) to extend into the detection groove (3) and press down and fix the sealing gasket in the detection groove (3). The air supply cylinder (7) introduces gas into the detection groove (3), and the gas passing through the sealing gasket passes through the exhaust pipe (5) into the water.

2. The high-temperature airtightness testing device for a sealing gasket according to claim 1, characterized in that, The detection groove (3) includes a first groove (12) and a second groove (13) arranged sequentially from top to bottom; The heating plate (4) is installed at the bottom of the second tank (13), and the radius of the first tank (12) is greater than the radius of the second tank (13).

3. The high-temperature airtightness testing device for a sealing gasket according to claim 2, characterized in that, The air supply cylinder (7) is equipped with a sealing column (14), the diameter of which is equal to the diameter of the hole on the sealing gasket.

4. The high-temperature airtightness testing device for a sealing gasket according to claim 3, characterized in that, The air supply cylinder (7) presses the sealing gasket into the groove of the second groove (13), the sealing column (14) extends into the hole on the sealing gasket, the bottom surface of the sealing gasket completely covers the groove of the second groove (13), and the top surface of the sealing gasket completely covers the opening of the air supply cylinder (7). The outer diameter of the air supply cylinder (7) is larger than the inner diameter of the second trough (13).

5. The high-temperature airtightness testing device for a sealing gasket according to claim 2, characterized in that, The detection groove (3) has a through hole on its side wall, and the through hole is connected to the exhaust pipe (5); The end of the through hole faces the inside of the second groove (13).

6. The high-temperature airtightness testing device for a sealing gasket according to claim 5, characterized in that, The bottom of the fixed plate (2) is provided with a water tank (10), and the end of the exhaust pipe (5) away from the through hole extends into the water tank (10).

7. The high-temperature airtightness testing device for a sealing gasket according to claim 1, characterized in that, A miniature air pump (11) is installed at the bottom of the movable plate (6), and the air outlet pipe of the miniature air pump (11) is connected to the air supply cylinder (7).

8. The high-temperature airtightness testing device for a sealing gasket according to claim 1, characterized in that, A disc support (1) is provided above the movable disc (6), a drive cylinder (8) is installed on the disc support (1), a drive shaft (9) is installed at the end of the drive cylinder (8), and the end of the drive shaft (9) is connected to the movable disc (6).

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