Airtight seal detection device based on thin-wall shell

Abstract

The utility model relates to an air-tight seal detection device based on a thin-wall shell, which comprises a detection table, a fixing plate, a product placing mechanism, a downward pressing mechanism and a horizontal pressing mechanism, and is characterized in that the fixing plate is fixed on the detection table, and the product placing mechanism, the downward pressing mechanism and the horizontal pressing mechanism are arranged above the fixing plate; the product placing mechanism comprises a sealing gasket, a sealing pressing block and a supporting block; the supporting block is the same as the interior of the shell in shape; the middle of the sealing pressing block is a square cavity, the width of the cavity is matched with the length of the shell, and a circle of protruding rib is arranged outside the square cavity on the downward face of the sealing pressing block. A screw penetrates through the supporting block and the sealing gasket and is fixed on the fixing plate; the horizontal pressing mechanism comprises a finger air cylinder, a horizontal pressing plate and a rubber pad, the horizontal pressing plate is fixed to a movable part of the finger air cylinder, and the rubber pad is fixed to the horizontal pressing plate; according to the utility model, the thin-wall shell is not easy to deform during air tightness detection through the supporting block, and the bottom, the left opening and the right opening of the shell are sealed through the design of the product placing mechanism.

Description

Technical Field

[0001] This utility model belongs to the field of shell sealing detection, and specifically relates to a thin-walled shell gas seal detection device. Background Technology

[0002] Gas tightness testing uses a tracer gas (helium) to determine the sealing performance of components with internal cavities that are either vacuum-sealed or contain air or other gases. Defects on any part of the surface of a sealing element can allow harmful impurities to enter the internal cavity, thereby reducing the effective lifespan of the element. Gas tightness testing can detect leaks caused by the use of inferior sealing materials or poor sealing processes.

[0003] The sealing process of the outer shell involves welding at the top. The bottom and left / right parts of the outer shell have openings and are not sealed. The airtightness test of the outer shell is performed on the welding process at the top. During the test, the bottom, left and right parts of the outer shell must be sealed in order to achieve the airtightness test.

[0004] Chinese patent application number CN202023190524.1 discloses a convenient testing device for the casing of a large water pump. The testing device has a first electric telescopic rod in the vertical direction and a second electric telescopic rod in the horizontal direction, which can be used with a base to fix the casing to be tested from two directions.

[0005] However, this detection device has the following problems:

[0006] 1) The testing mechanism lacks support blocks, which can easily cause deformation of the shell when testing thin-walled shells;

[0007] 2) The testing agency was unable to seal the lower and left / right parts of the outer casing; Utility Model Content

[0008] To solve the above problems, this utility model provides a thin-walled shell gas tightness testing device, 1. comprising: a testing platform, a fixing plate, a product placement mechanism, a pressing mechanism and a horizontal pressing mechanism, wherein the fixing plate is fixed on the testing platform, and the product placement mechanism, the pressing mechanism and the horizontal pressing mechanism are installed above the fixing plate;

[0009] The product placement mechanism includes a sealing gasket and a support block;

[0010] The horizontal pressing mechanism includes: a finger cylinder, a horizontal pressing plate, and a rubber pad. The horizontal pressing plate is installed on the moving part of the finger cylinder, and the rubber pad is installed on the horizontal pressing plate.

[0011] The fixed plate is provided with mounting holes for the pressing mechanism, the sealing gasket, the fixed plate, and the horizontal pressing mechanism. Screws pass through the mounting holes of the fixed plate to install the fixed plate on the testing table; a square groove is provided in the middle of the fixed plate as the installation position for the sealing groove.

[0012] The product placement mechanism also includes a sealing block, which has a square cavity in the middle, the width of which matches the length of the outer shell; the sealing block is provided with a sealing block mounting hole, and screws pass through the sealing block mounting hole and the fixing plate to install the sealing block.

[0013] A raised rib is provided around the square hole on the downward side of the sealing block.

[0014] The sealing gasket is square, with an area larger than the central cavity of the sealing block, and is placed between the fixing plate and the sealing block.

[0015] The support block is provided with support block mounting holes, and screws pass through the support block mounting holes, sealing gaskets, and fixing plates to fix the three together.

[0016] The pressing mechanism includes: an adjusting column, a cylinder fixing plate, a dual-axis cylinder, a pressing mechanism adjusting valve, and a pressing plate. The adjusting column is mounted on the fixing plate, the cylinder fixing plate is mounted on the adjusting column, and the dual-axis cylinder is mounted on the cylinder fixing plate by screws. The extended end of the dual-axis cylinder is aligned with the product placement mechanism, and the pressing plate is mounted on the extended end of the dual-axis cylinder by screws. The pressing mechanism adjusting valve is located at the inlet and outlet of the dual-axis cylinder.

[0017] The pressure plate has a U-shaped cross-section with the opening facing downwards. The opening width matches the length of the outer casing. There are pressure plate mounting holes on the top of the pressure plate.

[0018] The horizontal pressing mechanism also includes: a horizontal pressing mechanism regulating valve, which is located at the inlet and outlet of the finger cylinder; the finger cylinder has a finger cylinder mounting hole, and a screw passes through the finger cylinder mounting hole to mount the finger cylinder on the fixing plate.

[0019] The spacing, quantity, and size of the rubber pads correspond to the circular openings on the left and right sides of the outer casing.

[0020] This utility model has the following beneficial effects:

[0021] 1) The internal support blocks prevent the thin-walled outer shell from deforming during airtightness testing;

[0022] 2) The bottom of the outer casing is sealed by pressing down on the sealing gasket placed at the bottom of the casing in conjunction with the pressing mechanism;

[0023] 3) The left and right openings of the outer casing are sealed by the pressure of the rubber pad and the finger cylinder;

[0024] 4) The design of screws passing through the support block and the sealing gasket to install it on the fixed plate, and the raised ribs at the bottom of the sealing block, make the sealing gasket less likely to move, be lost, or develop wrinkles that would lead to a poor sealing effect. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of this utility model;

[0026] Figure 2 This utility model is mainly used to display the structural diagram of the fixing plate;

[0027] Figure 3 This utility model is mainly used to display the structural diagram of the product placement mechanism;

[0028] Figure 4 This utility model is mainly used to show the structural schematic diagram of the pressing mechanism;

[0029] Figure 5 This utility model is mainly used to demonstrate the structural schematic diagram of the horizontal pressing mechanism;

[0030] Figure 6 This utility model is mainly used to demonstrate the structural diagram of the sealing block;

[0031] Figure 7 This utility model is mainly used to show the structural diagram of the outer shell;

[0032] In the diagram: 1-Testing platform; 2-Fixing plate; 3-Product placement mechanism; 4-Pressing mechanism; 5-Horizontal pressing mechanism; 201-Adjusting column mounting hole; 202-Sealing gasket installation position; 203-Sealing gasket block mounting hole; 204-Mounting holes for testing platform and fixed plate; 205-Horizontal pressing mechanism mounting hole; 301-Sealing gasket; 302-Sealing pressure block mounting hole; 303-Support block mounting hole; 304-Sealing pressure block; 305-Support block; 306-Raised rib; 401-Adjusting column; 402-Cylinder fixing plate; 403-Dual-axis cylinder; 404-Pressing mechanism adjusting valve; 405-M4 screw; 406-Pressing plate mounting hole; 407-Pressing plate; 501-Finger cylinder; 502-Water pressing mechanism adjusting valve; 503-Finger cylinder mounting hole; 504-Rubber pad; 505-Horizontal pressure plate. Detailed Implementation

[0033] 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.

[0034] The shell to be tested is rectangular in shape, with openings on the bottom and left and right sides that are not sealed. The airtightness test of the shell is to test the airtightness of the welding process on the top of the shell. During the test, the bottom, left and right sides of the shell must be sealed in order to achieve the airtightness test.

[0035] Example 1

[0036] Please see Figure 1 This utility model provides a technical solution: a thin-walled shell gas tightness testing device, including: a testing platform 1, a fixing plate 2, a product placement mechanism 3, a pressing mechanism 4 and a horizontal pressing mechanism 5, wherein the fixing plate 2 is fixed on the testing platform 1, and the product placement mechanism 3, the pressing mechanism 4 and the horizontal pressing mechanism 5 are installed above the fixing plate;

[0037] Please see Figure 2 The fixing plate 2 is provided with mounting holes 201 for the pressing mechanism, 203 for the sealing gasket, 204 for the fixing plate, and 205 for the horizontal pressing mechanism. Screws pass through the mounting holes 204 to mount the fixing plate 2 onto the testing table. A square groove is provided in the middle of the fixing plate 2 as the sealing groove mounting position 202. The mounting holes on the fixing plate 2 are used to install the product placement mechanism 3, the pressing mechanism 4, and the horizontal pressing mechanism 5.

[0038] Please see Figure 3 The product placement mechanism 3 includes a sealing gasket 301 and a support block 305, the support block 305 having the same shape as the inside of the outer shell. This makes the thin-walled outer shell less prone to being squeezed and deformed during testing.

[0039] The sealing gasket 301 is square, with an area larger than the central cavity of the sealing block 304, and is placed between the fixing plate 2 and the sealing block 304 to ensure a sealing effect on the bottom of the outer shell.

[0040] The support block 305 is provided with a support block mounting hole 303. Screws pass through the support block mounting hole 303, the sealing gasket 301, and the fixing plate 2 to fix the three together. The sealing gasket is then fixed.

[0041] The product placement mechanism 3 also includes a sealing block 304, which has a square cavity in the middle, and the width of the cavity matches the length of the outer shell. The sealing block 304 is provided with a sealing block mounting hole 302, and screws are used to install the sealing block 304 through the sealing block mounting hole 302 and the fixing plate mounting hole 204.

[0042] Please see Figure 6 A raised rib 306 is provided around the square hole on the downward-facing side of the sealing block 304. This prevents the sealing gasket from wrinkling and thus reducing the sealing effect.

[0043] Please see Figure 4 The pressing mechanism 4 includes: an adjusting column 401, a cylinder fixing plate 402, a dual-axis cylinder 403, a pressing mechanism adjusting valve 404, and a pressing plate 407. The adjusting column 401 is mounted on the fixing plate 2 through the pressing mechanism mounting hole 201. The cylinder fixing plate 402 is mounted on the adjusting column 401. The dual-axis cylinder 403 is mounted on the cylinder fixing plate 402 through M4 screws 405. The extended end of the dual-axis cylinder 403 is aligned with the product placement mechanism 3. The pressing plate 407 is mounted on the extended end of the dual-axis cylinder 403 through screws. The pressing mechanism adjusting valve 404 is located at the inlet and outlet of the dual-axis cylinder 403.

[0044] The pressure plate 407 has a U-shaped cross-section with the opening facing downwards. The width of the opening matches the length of the outer casing. There is a pressure plate mounting hole 406 on the top of the pressure plate.

[0045] Please see Figure 5 The horizontal pressing mechanism 5 includes: a finger cylinder 501, a horizontal pressing plate 505, and a rubber pad 504. The horizontal pressing plate 505 is installed on the movable part of the finger cylinder 501, and the rubber pad 504 is installed on the horizontal pressing plate 505.

[0046] The horizontal pressing mechanism 5 also includes: a horizontal pressing mechanism regulating valve 502, which is located at the inlet and outlet of the finger cylinder 501; the finger cylinder 501 has a finger cylinder mounting hole 503, and screws pass through the finger cylinder mounting hole 503 and the horizontal pressing mechanism mounting hole 205 to fix the finger cylinder 501 on the fixing plate 2.

[0047] The spacing, quantity, and size of the 504 stainless steel rubber gaskets correspond to the circular openings on the left and right sides of the outer casing. This ensures a tight seal for the openings on the left and right sides of the outer casing.

[0048] Working principle: The dual-axis cylinder is controlled by operating the downward pressing mechanism adjustment valve, and the finger cylinder is controlled by operating the horizontal pressing mechanism adjustment valve. Before use, the pressing plate is raised and the horizontal pressing plate is opened. When testing for air tightness, the shell to be tested is placed in the product placement mechanism, and the support block is inserted into the bottom of the shell. Using the downward pressing mechanism of the device, the dual-axis cylinder extends, so that the pressing plate presses the shell. The extension position of the dual-axis cylinder can be adjusted by the adjustment column to achieve tight contact between the lower part of the shell and the sealing gasket. The finger cylinder is used to achieve sealing on the left and right sides. The finger cylinder opens and closes to the left and right, so that the rubber gasket makes tight contact with the openings on the left and right sides of the shell, achieving the sealing requirements.

[0049] This invention utilizes a support block within the device to prevent the thin-walled outer shell from deforming during airtightness testing; a sealing gasket placed at the bottom of the outer shell, combined with a pressing mechanism, seals the bottom of the outer shell; a rubber gasket, combined with the pressing of a finger cylinder, seals the left and right openings of the outer shell; and screws passing through the support block and sealing gasket to mount them on a fixed plate, along with the design of raised ribs at the bottom of the sealing block, prevent the sealing gasket from shifting, being lost, or wrinkling, which could lead to a poorer sealing effect.

[0050] The above-disclosed embodiments are merely specific examples of this utility model. However, this utility model is not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of this utility model.

Claims

1. A device for detecting the gas tightness of a thin-walled shell, characterized in that, include: The test platform (1), the fixing plate (2), the product placement mechanism (3), the pressing mechanism (4) and the horizontal pressing mechanism (5) are provided. The fixing plate (2) is fixed on the test platform (1). The product placement mechanism (3), the pressing mechanism (4) and the horizontal pressing mechanism (5) are installed on the top of the fixing plate. The product placement mechanism (3) includes a sealing gasket (301) and a support block (305); The horizontal pressing mechanism (5) includes: a finger cylinder (501), a horizontal pressing plate (505) and a rubber pad (504). The horizontal pressing plate (505) is installed on the movable part of the finger cylinder (501), and the rubber pad (504) is installed on the horizontal pressing plate (505).

2. The thin-walled shell gas tightness detection device as described in claim 1, characterized in that: The fixing plate (2) is provided with a pressing mechanism mounting hole (201), a sealing gasket mounting hole (203), a fixing plate mounting hole (204) and a horizontal pressing mechanism mounting hole (205). The screw passes through the fixing plate mounting hole (204) to install the fixing plate (2) on the test table; a square groove is provided in the middle of the fixing plate (2) as the sealing groove installation position (202).

3. The thin-walled shell gas tightness detection device as described in claim 1, characterized in that: The product placement mechanism (3) also includes a sealing block (304), the sealing block (304) has a square hole in the middle, and the width of the hole matches the length of the outer shell; the sealing block (304) is provided with a sealing block mounting hole (302), and the screw passes through the sealing block mounting hole (302) and the fixing plate (2) to install the sealing block (304).

4. The thin-walled shell gas tightness detection device as described in claim 3, characterized in that: A raised rib (306) is provided around the square hole on the downward-facing side of the sealing block (304).

5. The thin-walled shell gas tightness detection device as described in claim 3, characterized in that: The sealing gasket (301) is square, with an area larger than the central cavity of the sealing block (304), and is placed between the fixing plate (2) and the sealing block (304).

6. The thin-walled shell gas tightness detection device as described in claim 1, characterized in that: The support block (305) is provided with a support block mounting hole (303), and screws pass through the support block mounting hole (303), the sealing gasket (301) and the fixing plate (2) to fix the three together.

7. The thin-walled shell gas tightness detection device as described in claim 1, characterized in that: The pressing mechanism (4) includes: an adjusting column (401), a cylinder fixing plate (402), a dual-axis cylinder (403), a pressing mechanism regulating valve (404), and a pressing plate (407). The adjusting column (401) is mounted on the fixing plate (2), the cylinder fixing plate (402) is mounted on the adjusting column (401), the dual-axis cylinder (403) is mounted on the cylinder fixing plate (402) by screws, the extended end of the dual-axis cylinder (403) is aligned with the product placement mechanism (3), and the pressing plate (407) is mounted on the extended end of the dual-axis cylinder (403) by screws. The pressing mechanism regulating valve (404) is located at the inlet and outlet of the dual-axis cylinder (403).

8. The thin-walled shell gas tightness detection device as described in claim 7, characterized in that: The pressing plate (407) has a U-shaped cross-section with the opening facing downwards. The opening width matches the length of the outer shell. There is a pressing plate mounting hole (406) on the top of the pressing plate.

9. The thin-walled shell gas tightness detection device as described in claim 1, characterized in that: The horizontal pressing mechanism (5) further includes: a horizontal pressing mechanism regulating valve (502), which is located at the inlet and outlet of the finger cylinder (501); the finger cylinder (501) has a finger cylinder mounting hole (503), and a screw passes through the finger cylinder mounting hole (503) to mount the finger cylinder (501) on the fixing plate (2).

10. The thin-walled shell gas tightness detection device as described in claim 1, characterized in that: The spacing, quantity, and size of the rubber pads (504) correspond to the circular openings on the left and right sides of the outer shell.

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