Air tight test tool for air tight nut

Abstract

The utility model provides a kind of air-tight test tool of air-tight nut, including top open can body, the top of can body is detachably fixed with cover by fixed bolt, and cover is equipped with through-hole, each through-hole is equipped with fastening bolt, and fastening bolt is equipped with air hole, air plug is fixed in air hole, can body right end is equipped with gas injection pipe, and the right side of can body is equipped with air pump;It also includes the transparent box of being arranged in the left side of can body, and the detection liquid for detecting air-tightness is arranged in box, and the top of box is detachably equipped with box cover, and box cover is fixed with several vertical and with fastening bolt one-to-one corresponding detection tube, and the lower end of detection tube extends to detection liquid, and the upper end of detection tube extends out of box cover, and detection tube and air plug are equipped with hose for gas passing between them.The utility model structure is simple, and convenient to use.

Description

Technical Field

[0001] This utility model belongs to the field of airtight nut testing technology, and in particular relates to an airtight testing fixture for airtight nuts. Background Technology

[0002] A nut is a fastener that is screwed onto a bolt or threaded rod to secure a fastener. It's an essential component in all manufacturing machinery. Based on their material, nuts are categorized into several types, including carbon steel, stainless steel, and non-ferrous metals (such as copper), as shown in the instruction manual. Figure 1 For a type of airtight double-ear self-locking nut (airtight nut 5) conforming to GB / T 933-1988, airtightness testing is required during production. However, there is currently a lack of specialized testing equipment for this type of nut on the market. Most existing testing methods and technologies are either too complex and costly, or have low testing efficiency and are not convenient for intuitive observation of the airtightness of the nut. Utility Model Content

[0003] This invention addresses the technical problems of inconvenient and inefficient testing of airtight nuts by providing an airtightness testing fixture for airtight nuts. The fixture includes a top-opening container with a detachable cover secured to the top via bolts. The cover has several vertically arranged through holes, each containing a fastening bolt. Each fastening bolt has a vertically penetrating vent hole into which a plug-in connector can be inserted. This connector connects a flexible hose inside the container to the outside, facilitating hose insertion and removal. An air injection port is located at the right end of the container, and an air pump is also located on the right side. The air pump is connected to the air injection port via a vent pipe. When testing the airtightness of the nut, the air pump is activated, pressurizing the container through the air injection port until the internal pressure exceeds the external atmospheric pressure. It also includes a transparent enclosure located on the left side of the tank. The enclosure can be made of transparent glass, allowing staff to easily observe the contents. The enclosure contains a testing liquid for airtightness testing; the testing liquid can be water or a transparent liquid oil. A detachable cover is installed at the top of the enclosure. Several vertically aligned testing tubes, each corresponding to a fastening bolt, are fixed to the cover. The lower ends of the testing tubes extend downwards into the testing liquid, while the upper ends extend upwards out of the cover. A flexible hose connects the testing tubes to the plug-in connector to facilitate gas passage. During use, an air pump pressurizes the tank through the vent pipe, increasing the pressure inside.

[0004] Preferably, the top of the cover is provided with an exhaust port. When the airtight nut leaks air, the gas flows through the hose into the detection liquid inside the box and is discharged from the box through the exhaust port.

[0005] Preferably, a sealing ring is provided between the tank body and the lid body to provide a sealing effect.

[0006] Preferably, the cover has two threaded holes on both sides of the through hole, which correspond to the airtight nut. In use, the sealing nut to be tested is fixed to the through hole of the cover by fixing screws.

[0007] Preferably, the vent pipe is equipped with a battery valve.

[0008] The above-mentioned approach has the following advantages:

[0009] Several airtight nuts can be fixed on the cover at one time. The airtightness of the nuts can be confirmed by observing whether gas is discharged from the corresponding detection tube inside the chamber, which improves the detection efficiency and allows multiple airtight nuts to be tested at once. The plug-in connector makes it easy to insert the hose into the fastening bolt. The sealing ring improves the sealing between the cover and the tank. The exhaust port facilitates the discharge of gas from the detection tube into the chamber. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of an airtight nut;

[0011] Figure 2 This is a schematic diagram of the structure of this utility model;

[0012] Figure 3 for Figure 1 Enlarged view of part A.

[0013] Reference numerals: 1. Tank; 2. Air pump; 3. Box; 4. Detection fluid; 5. Airtight nut; 11. Cover; 12. Fixing bolt; 13. Air inlet; 14. Fastening bolt; 15. Fixing screw; 16. Plug-in connector; 17. Sealing ring; 21. Vent pipe; 22. Solenoid valve; 31. Box cover; 32. Detection tube; 33. Exhaust port; 34. Hose. Detailed Implementation

[0014] like Figure 1-3As shown, an airtightness testing fixture for an airtight nut includes a tank 1 with an open top. A cover 11 is detachably fixed to the top of the tank 1 via bolts 12. The cover 11 has several vertically arranged through holes, each containing a fastening bolt 14. Each fastening bolt 14 has a vertically extending vent hole 141, into which a plug-in connector 16 can be inserted and fixed. The plug-in connector 16 connects the inside of the tank 1 to a flexible hose 34 outside the tank 1, facilitating the insertion and removal of the hose 34. An air injection port 13 is located at the right end of the tank 1, and an air pump 2 is located on the right side of the tank 1. The air pump 2 is connected to the air injection port 13 via a vent pipe 21. When testing the airtightness of the nut, the air pump 2 is activated, pressurizing the tank 1 through the air injection port 13 until the air pressure inside the tank 1 exceeds the external atmospheric pressure. It also includes a transparent box 3 located on the left side of the tank 1. The box 3 can be made of transparent glass to facilitate observation of the contents by staff. The box 3 contains a test liquid 4 for testing airtightness. The test liquid 4 can be water or a transparent liquid oil for testing. A box cover 31 is detachably installed on the top of the box 3. Several vertical test tubes 32 are fixed on the box cover 31 and are arranged one-to-one with the fastening bolts 14. The lower end of the test tube 32 extends downward into the test liquid 4, and the upper end of the test tube 32 extends upward out of the box cover 31. A flexible hose 34 is provided between the test tube 32 and the plug-in connector 16 to facilitate the passage of gas. In use, the air pump 2 inflates the tank 1 through the air pipe 21, increasing the air pressure inside the tank 1.

[0015] Preferably, the top of the cover 31 is provided with an exhaust port 33. When the airtight nut leaks air, the gas flows through the hose 34 into the detection liquid 4 inside the box 3 and is discharged from the box 3 through the exhaust port 33.

[0016] Preferably, a sealing ring 17 is provided between the tank body 1 and the cover body 11 to provide a sealing function.

[0017] Preferably, the cover 11 has two threaded holes on both sides of the through hole, which correspond to the airtight nut 5. In use, the sealing nut 5 to be tested is fixed to the through hole of the cover 11 by fixing screw 15.

[0018] Preferably, the vent pipe 21 is provided with a battery valve 22.

[0019] Usage process:

[0020] In use, this invention first injects an appropriate amount of test liquid 4 into the housing 3, then fastens the lid 31 onto the top of the housing 3, removes the fixing bolts 12 at the top of the housing 1 one by one, then removes the lid 11, and sequentially threads each airtight nut 5 to be tested onto the fastening bolt 14, and fixes the airtight nut 5 to the lid 11 with the fixing screw 15. Connects the right end of the hose 34 to the lower end of the fastening bolt 14 through the plug-in connector 16, and then secures the lid with the fixing bolt 12. 11 is fixed to the top of the tank 1. The air pump 2 is started. The air pump 2 injects appropriate air into the tank 1 through the air pipe 21 and the air injection port 13, so that the air pressure in the tank 1 is higher than the atmospheric pressure. Observe the condition of the detection tube 32 in the box 3. If there are bubbles coming out of the bottom of the detection tube 32, it means that the airtightness of the airtight nut 5 corresponding to the detection tube 32 is not good and it is a defective product. If there are no bubbles coming out of the bottom of the detection tube 32, it means that the airtightness of the airtight nut 5 corresponding to the detection tube 32 is good.

[0021] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "top", "bottom", "horizontal", "vertical", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the protection scope of the present invention.

Claims

1. A test fixture for airtight nuts, comprising a tank with an open top, a cover detachably fixed to the top of the tank by fixing bolts, and a plurality of vertically arranged through holes on the cover, characterized in that: Each through hole is equipped with a fastening bolt, and the fastening bolt has a vertical and through vent hole. A plug-in connector can be inserted and fixed into the vent hole. There is an air injection port at the right end of the tank. There is an air pump on the right side of the tank. The air pump is connected to the air injection port through a vent pipe. It also includes a transparent box set on the left side of the tank. The box contains a test liquid for testing air tightness. The top of the box is detachably equipped with a box cover. Several vertical test tubes are fixed on the box cover and are set one by one with the fastening bolts. The lower end of the test tube extends downward into the test liquid, and the upper end of the test tube extends upward out of the box cover. There is a flexible tube between the test tube and the plug-in connector to facilitate the passage of gas.

2. The airtightness testing fixture for an airtight nut according to claim 1, characterized in that: The top of the lid has a vent.

3. The airtightness testing fixture for an airtight nut according to claim 1, characterized in that: A sealing ring is provided between the tank body and the lid body to provide a seal.

4. The airtightness testing fixture for an airtight nut according to claim 1, characterized in that: The cover has two threaded holes on both sides of the through hole, which correspond to the airtight nuts.

5. The airtightness testing fixture for an airtight nut according to claim 1, characterized in that: The vent pipe is equipped with a battery valve.

6. The airtightness testing fixture for an airtight nut according to claim 1, characterized in that: The test solution can be water or a transparent liquid oil for testing.

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