High-safety mounting hole protection device for temperature test product

Abstract

The utility model relates to the technical field of temperature test, in particular to a high-safety mounting hole protection device for a temperature test product, which comprises a mounting plate, a through hole is formed in the top of the mounting plate, a polytetrafluoroethylene sleeve is placed in an inner cavity of the through hole, a screw is connected to an inner cavity of the polytetrafluoroethylene sleeve in a penetrating manner, and the mounting plate is provided with a through hole. The top and the bottom of the surface of the screw are sleeved with a first polytetrafluoroethylene gasket and a second polytetrafluoroethylene gasket respectively. The polytetrafluoroethylene sleeve is placed in the through hole, the first polytetrafluoroethylene gasket is arranged on the top of the surface of the screw in a sleeved mode, the screw penetrates through the polytetrafluoroethylene sleeve and is arranged in the second polytetrafluoroethylene gasket in a sleeved mode, the nut is screwed to position and install the installation plate, and the polytetrafluoroethylene material has excellent heat resistance and cold resistance and can be used for a long time at the temperature ranging from-180 DEG C to 260 DEG C; meanwhile, excellent chemical stability, corrosion resistance, sealing performance, high lubrication non-stick performance, electrical insulation performance and good anti-aging endurance are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of temperature testing, in particular to a mounting hole protection device for a temperature testing product with high safety. Background Art

[0002] Temperature tests include high and low temperature tests in temperature chambers, high and low temperature and humidity tests, thermal vacuum high and low temperature tests, high and low temperature aging tests, etc. When the product is installed or fastened in the test equipment, the main means is to fasten it with screws. During the installation of the screws, the threads, screw caps and nuts of the screws will rub and squeeze against the inner wall and surface of the product's mounting hole, thereby damaging the physical appearance of the product, and seriously affecting the product performance.

[0003] At present, most laboratories choose the method of heat shrink tube and flat spring sheet. They use heat shrink tube to wrap the screws and then install them to protect the inner wall of the product installation hole, and add flat spring pads to the screw caps to protect the hole surface. However, the temperature resistance range of heat shrink tube is low, and the hardness is low. It is easy to be damaged in the case of thread extrusion and cannot play a protective effect. At the same time, the hardness of flat spring pads is high, and the hole surface will be damaged by extrusion. The friction coefficient is high and it is easy to be damaged by friction. In order to solve the above technical problems, we have designed a high-safety temperature test product installation hole protection device. Utility Model Content

[0004] The purpose of the utility model is to provide a high-safety installation hole protection device for temperature test products, which has the advantages of high and low temperature resistance, low friction coefficient, electrical insulation, strong anti-aging ability, and good mechanical toughness under high and low temperatures, and solves the problems of low temperature resistance range, easy damage and inability to play a protective effect, and high friction coefficient, which easily causes damage to the hole surface.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a mounting hole protection device for a high-safety temperature test product, comprising a mounting plate, a through hole is opened on the top of the mounting plate, a polytetrafluoroethylene sleeve is placed in the inner cavity of the through hole, a screw is connected through the inner cavity of the polytetrafluoroethylene sleeve, and a first polytetrafluoroethylene gasket and a second polytetrafluoroethylene gasket are respectively sleeved on the top and bottom of the screw surface.

[0006] Preferably, a positioning plate is placed at the bottom of the second polytetrafluoroethylene gasket, and the bottom of the screw penetrates through the bottom of the positioning plate and is threadedly sleeved with a nut.

[0007] Preferably, the polytetrafluoroethylene sleeve comprises a sleeve body, a surface on the front side of the sleeve body is provided with scale lines, and a rubber gasket is glued to the inner cavity of the sleeve body.

[0008] Preferably, the rubber gasket comprises a gasket body, and a thin film easy-tear tape is adhered to the outer surface of the gasket body.

[0009] Preferably, the gasket body and the film easy-tear adhesive tape are both composed of several layers, and the gasket body is distributed front to back.

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0011] The polytetrafluoroethylene sleeve is placed in the through hole, the first polytetrafluoroethylene gasket is put on the top of the screw surface, the screw passes through the polytetrafluoroethylene sleeve, and is inserted into the second polytetrafluoroethylene gasket. The nut is tightened to position and install the mounting plate. The polytetrafluoroethylene material has excellent heat resistance and cold resistance, and can be used for a long time at -180 ~ 260 ℃. It also has excellent chemical stability, corrosion resistance, sealing, high lubricity and non-stickiness, electrical insulation and good anti-aging resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is an axonometric drawing of the structure of the utility model;

[0013] Figure 2 It is an exploded view of the local structure of the utility model;

[0014] Figure 3 This is an axonometric view of the polytetrafluoroethylene sleeve of the utility model;

[0015] Figure 4 It is an axonometric view of the rubber gasket and the sleeve body of the utility model.

[0016] In the figure: 1. mounting plate; 2. nut; 3. positioning plate; 4. first polytetrafluoroethylene gasket; 5. screw; 6. second polytetrafluoroethylene gasket; 7. polytetrafluoroethylene sleeve; 8. through hole; 9. rubber gasket; 10. sleeve body; 11. scale line; 12. gasket body; 13. thin film easy-tear tape. DETAILED DESCRIPTION

[0017] See also Figure 1-Figure 4 A mounting hole protection device for a high-safety temperature test product comprises a mounting plate 1, a through hole 8 is formed on the top of the mounting plate 1, a polytetrafluoroethylene sleeve 7 is placed in the inner cavity of the through hole 8, a screw 5 is connected through the inner cavity of the polytetrafluoroethylene sleeve 7, and a first polytetrafluoroethylene gasket 4 and a second polytetrafluoroethylene gasket 6 are respectively sleeved on the top and bottom of the surface of the screw 5;

[0018] See also Figure 2 A positioning plate 3 is placed at the bottom of the second polytetrafluoroethylene gasket 6, and the bottom of the screw 5 penetrates to the bottom of the positioning plate 3 and is threadedly sleeved with a nut 2;

[0019] See also Figure 3 The polytetrafluoroethylene sleeve 7 includes a sleeve body 10. A scale line 11 is provided on the front surface of the sleeve body 10. By providing the scale line 11, it is convenient for personnel to cut off the use length of the sleeve body 10 according to the value on the scale line 11, and no other tools are needed to measure the length. The use is more convenient. A rubber gasket 9 is glued to the inner cavity of the sleeve body 10.

[0020] See also Figure 4 The rubber gasket 9 includes a gasket body 12, and a thin film easy-to-tear tape 13 is glued to the outer surface of the gasket body 12. By providing the thin film easy-to-tear tape 13, the gasket bodies 12 can be conveniently bonded together and easily torn off;

[0021] See also Figure 3 The gasket body 12 and the film easy-tear adhesive tape 13 are both composed of several layers, and the gasket body 12 is distributed front to back.

[0022] When in use, use a vernier caliper to measure the size of the through hole 8, purchase or order a first polytetrafluoroethylene gasket 4, a second polytetrafluoroethylene gasket 6 and a polytetrafluoroethylene sleeve 7 of corresponding sizes, put the polytetrafluoroethylene sleeve 7 into the through hole 8, first put the first polytetrafluoroethylene gasket 4 on the top of the surface of the screw 5, and then make the screw 5 pass through the polytetrafluoroethylene sleeve 7, adjust the diameter of the inside of the polytetrafluoroethylene sleeve 7 according to the diameter of the screw 5, when the diameter of the screw 5 is too large to pass through the polytetrafluoroethylene sleeve 7, the personnel gradually tear off the rubber gasket 9 inside the sleeve body 10, and change the hole diameter of the sleeve body 10 until the screw 5 can be put in. Insert, so that screws 5 of different diameters can be inserted for use, no need to select, and the applicability is better. The screw 5 passes through the polytetrafluoroethylene sleeve 7 and then is inserted into the second polytetrafluoroethylene gasket 6, and finally passes through the positioning plate 3 and tightens the nut 2 to position and install the mounting plate 1. The first polytetrafluoroethylene gasket 4, the second polytetrafluoroethylene gasket 6 and the polytetrafluoroethylene sleeve 7 are all made of polytetrafluoroethylene, which has excellent heat resistance and cold resistance, and can be used for a long time at -180 ~ 260 ° C. At the same time, it has excellent chemical stability, corrosion resistance, sealing, high lubrication and non-stickiness, electrical insulation and good anti-aging resistance.

[0023] In summary: the mounting hole protection device of the high-safety temperature test product, through the coordinated use of the mounting plate 1, the nut 2, the first polytetrafluoroethylene gasket 4, the screw 5, the second polytetrafluoroethylene gasket 6, the polytetrafluoroethylene sleeve 7 and the through hole 8, solves the problems of low temperature resistance range, easy damage and inability to play a protective effect, high friction coefficient and easy damage to the hole surface.

Claims

1. A mounting hole protection device for a high-safety temperature test product, comprising a mounting plate (1), characterized in that: A through hole (8) is provided at the top of the mounting plate (1), a polytetrafluoroethylene sleeve (7) is placed in the inner cavity of the through hole (8), a screw (5) is connected through the inner cavity of the polytetrafluoroethylene sleeve (7), and a first polytetrafluoroethylene gasket (4) and a second polytetrafluoroethylene gasket (6) are respectively sleeved on the top and bottom of the surface of the screw (5).

2. The installation hole protection device of a high-safety temperature test product according to claim 1, characterized in that: A positioning plate (3) is placed at the bottom of the second polytetrafluoroethylene gasket (6), and the bottom of the screw (5) penetrates through the bottom of the positioning plate (3) and is threadedly sleeved with a nut (2).

3. The installation hole protection device of a high-safety temperature test product according to claim 1, characterized in that: The polytetrafluoroethylene sleeve (7) comprises a sleeve body (10), a scale line (11) is provided on the front surface of the sleeve body (10), and a rubber gasket (9) is glued to the inner cavity of the sleeve body (10).

4. The installation hole protection device for a high-safety temperature test product according to claim 3, characterized in that: The rubber gasket (9) comprises a gasket body (12), and a thin film easy-tear adhesive tape (13) is glued to the outer surface of the gasket body (12).

5. The installation hole protection device of a high-safety temperature test product according to claim 4, characterized in that: The gasket body (12) and the film easy-tear adhesive tape (13) are both composed of several layers, and the gasket body (12) is distributed front to back.

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