Leak-proof bolt

Abstract

The utility model provides a leakproof bolt, including body, end cover and nut, the body is connected with the connecting piece thread, is provided with the first recess on the outer surface of body, is provided with the first sealing washer in the first recess, the first recess surrounds the outer surface of body a round, the outer surface of body is provided with the external thread, the end cover with nut all sets up on the body, the end cover is located between the nut with the connecting piece, tightens the nut after, the end cover can compress the first sealing washer. This leakproof bolt realizes multilayer sealing effect through first sealing washer, second sealing washer and hemp or polytetrafluoroethylene band, compresses the first sealing washer through the end cover, realizes the waterproof of end, this leakproof bolt is applicable to the connecting structure that needs to dismantle frequently, has increased the operation cycle of equipment and reduced the difficulty of overhaul, has reduced the overhaul cost.

Description

Technical Field

[0001] This utility model relates to the field of bolt technology, and in particular to a leak-proof bolt. Background Technology

[0002] When connecting equipment containing liquid media with bolts, the liquid media inside the equipment may leak out from the gap between the bolts and nuts due to the pressure of the medium. If leakage occurs, it is necessary to stop the normal operation of the equipment and then maintain the leaking part, which seriously affects the working efficiency of the equipment and may even shorten the service life of the equipment. Utility Model Content

[0003] The purpose of this invention is to provide a leak-proof bolt that achieves double-layer sealing through a sealing ring and hemp thread. It is suitable for connection structures that require frequent disassembly, increases the equipment's operating cycle, reduces maintenance difficulty, and lowers maintenance costs.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A leak-proof bolt includes a body, an end cap, and a nut. The body is threadedly connected to a connected component. A first groove is provided on the outer surface of the body, and a first sealing ring is disposed within the first groove. The first groove surrounds the outer surface of the body. The outer surface of the body is provided with external threads. The end cap and the nut are both fitted onto the body, with the end cap located between the nut and the connected component. After the nut is tightened, the end cap can press against the first sealing ring.

[0006] Furthermore, in the aforementioned anti-leakage bolt, after the body is screwed into the bolt hole of the connected component, the first sealing ring contacts both the surface of the connected component and the end cap.

[0007] Furthermore, in the aforementioned anti-leakage bolt, the inner surface of the end cap is provided with a receiving groove, the outer periphery of the first sealing ring protrudes from the outer surface of the body, and the shape of the receiving groove is adapted to the shape of the first sealing ring.

[0008] Furthermore, in the aforementioned anti-leakage bolt, the inner surface of the nut is provided with a second groove, and a second sealing ring is provided in the second groove.

[0009] Furthermore, in the aforementioned anti-leakage bolts, both the first sealing ring and the second sealing ring are O-rings.

[0010] Furthermore, in the aforementioned anti-leakage bolts, both the first sealing ring and the second sealing ring are made of either fluororubber or hydrogenated nitrile rubber.

[0011] Furthermore, in the aforementioned anti-leakage bolt, the depth of the second groove is 2mm, and the cross-sectional diameter of the second sealing ring is 2.5mm.

[0012] Furthermore, in the aforementioned leak-proof bolts, hemp thread or polytetrafluoroethylene tape is wound around the external thread of the body.

[0013] Analysis shows that this utility model discloses a leak-proof bolt, which achieves a multi-layer sealing effect through a first sealing ring, a second sealing ring, and hemp thread or polytetrafluoroethylene tape. The end cap is used to press the first sealing ring to achieve waterproofing at the end. This leak-proof bolt is suitable for connection structures that require frequent disassembly, increases the equipment's operating cycle, reduces maintenance difficulty, and lowers maintenance costs. Attached Figure Description

[0014] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. Wherein:

[0015] Figure 1 A schematic diagram of the structure of an embodiment of this utility model.

[0016] Explanation of reference numerals in the attached drawings: 1. Body; 2. End cap; 3. Nut; 4. Groove; 5. Connected part. Detailed Implementation

[0017] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. Various examples are provided by way of explanation of the present invention and not by way of limitation. In fact, those skilled in the art will recognize that modifications and variations can be made to the present invention without departing from the scope or spirit of the invention. For example, a feature shown or described as part of one embodiment may be used in another embodiment to produce yet another embodiment. Therefore, it is desirable that the present invention encompass such modifications and variations that fall within the scope of the appended claims and their equivalents.

[0018] In the description of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and do not require that this utility model be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. The terms "connected," "linked," and "set up" used in this utility model should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a direct connection or an indirect connection through intermediate components; a wired connection, a radio connection, or a wireless communication signal connection. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0019] The accompanying drawings illustrate one or more examples of the present invention. The detailed description uses numerals and letters to refer to features in the drawings. Similar or analogous reference numerals in the drawings and description have been used to refer to similar or analogous parts of the present invention. As used herein, the terms “first,” “second,” and “third,” etc., are used interchangeably to distinguish one component from another and are not intended to indicate the location or importance of individual components.

[0020] like Figure 1 As shown in the figure, according to an embodiment of the present invention, a leak-proof bolt is provided, including a body 1, an end cap 2, and a nut 3. The body 1 is threadedly connected to the connected component 5. A first groove 4 is provided on the outer surface of the body 1, and a first sealing ring, which is an O-ring, is provided in the first groove 4. The first groove 4 surrounds the outer surface of the body 1. The outer surface of the body 1 is provided with external threads. The end cap 2 and the nut 3 are both fitted onto the body 1. The end cap 2 is located between the nut 3 and the connected component 5. After tightening the nut 3, the end cap 2 can press the first sealing ring. The first sealing ring seals the gap between the body 1 and the connected component 5, preventing liquid medium from leaking out from the gap between the body 1 and the nut 3, thus ensuring the normal operation of the equipment.

[0021] Furthermore, after the body 1 is screwed into the bolt hole of the connected part 5, the first sealing ring contacts both the surface of the connected part 5 and the end cap 2.

[0022] Furthermore, the inner surface of the end cap 2 is provided with a receiving groove, and the outer periphery of the first sealing ring protrudes from the outer surface of the body 1. The shape of the receiving groove is adapted to the shape of the first sealing ring. This arrangement integrates the receiving groove of the end cap 2 with the first sealing ring. After the nut 3 is tightened, the nut 3 presses the first sealing ring through the end cap 2. The sealing pressure is adjusted by the depth of the body 1 screwed into the connected part 5, thereby achieving waterproofing at the end of the leak-proof bolt.

[0023] Furthermore, a second groove is provided on the inner surface of the nut 3, and a second sealing ring is provided in the second groove. The second sealing ring is an O-ring.

[0024] Furthermore, both the first and second sealing rings are made of either fluororubber or hydrogenated nitrile rubber.

[0025] Furthermore, the depth of the second groove is 2mm, and the cross-sectional diameter of the second sealing ring is 2.5mm.

[0026] Furthermore, hemp thread or PTFE tape is wound around the external thread of the body 1. The hemp thread or PTFE tape, the first sealing ring, and the second sealing ring form a multi-layer seal, which further improves the sealing effect of the bolt.

[0027] This leak-proof bolt is made by machining a first annular groove 4 at the root of the existing bolt (body 1) using a lathe. An O-ring is then inserted into the first groove 4 as a first sealing ring. Hemp thread or PTFE tape is wrapped around the threads of the body 1. After tightening the nut 3, the first sealing ring and the hemp thread or PTFE tape achieve a double-layer seal, ensuring that the liquid medium inside the connected component 5 does not leak from the connection between the body 1 and the connected component 5, thus guaranteeing the normal operation of the equipment. This leak-proof bolt is low in manufacturing cost, has a wide range of applications, is convenient and durable, and improves equipment performance.

[0028] To prevent bolt leakage, a second O-ring is added between the end cap 2 and the nut 3. Specifically, a 2mm deep groove is machined into the inner surface of the nut 3, and a second sealing ring with a cross-sectional diameter of 2.5mm is installed at the location of this groove. Tightening the nut 3 allows it to fit tightly against the end cap 2, compressing the second sealing ring between the nut 3 and the surface of the end cap 2, forming an end-face seal and achieving a multi-layer sealing effect. From the above description, it can be seen that the above embodiments of this utility model achieve the following technical effects:

[0029] A leak-proof bolt achieves a multi-layer sealing effect through a first sealing ring, a second sealing ring, and hemp thread or PTFE tape. The end cap 2 presses the first sealing ring to achieve end waterproofing. This leak-proof bolt is suitable for connection structures that require frequent disassembly, increases the equipment's operating cycle, reduces maintenance difficulty, and lowers maintenance costs.

[0030] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A leakproof bolt, characterized by, Includes the body, end caps, and nuts. The main body is threadedly connected to the connected part, and a first groove is provided on the outer surface of the main body. A first sealing ring is provided in the first groove, and the first groove surrounds the outer surface of the main body. The outer surface of the body is provided with external threads, and the end cap and the nut are both sleeved on the body, with the end cap located between the nut and the connected component; After the nut is tightened, the end cap can press against the first sealing ring.

2. The anti-leakage bolt according to claim 1, characterized in that, After the main body is screwed into the bolt hole of the connected component, the first sealing ring contacts both the surface of the connected component and the end cap.

3. The anti-leakage bolt according to claim 1, characterized in that, The inner surface of the end cap is provided with a receiving groove, and the outer periphery of the first sealing ring protrudes from the outer surface of the body. The shape of the receiving groove is adapted to the shape of the first sealing ring.

4. The anti-leakage bolt according to claim 1, characterized in that, The inner surface of the nut is provided with a second groove, and a second sealing ring is provided in the second groove.

5. The anti-leakage bolt according to claim 4, characterized in that, Both the first sealing ring and the second sealing ring are O-rings.

6. The leak-proof bolt according to claim 4, characterized in that, Both the first sealing ring and the second sealing ring are made of either fluororubber or hydrogenated nitrile rubber.

7. The anti-leakage bolt according to claim 4, characterized in that, The depth of the second groove is 2mm, and the cross-sectional diameter of the second sealing ring is 2.5mm.

8. The anti-leakage bolt according to claim 1, characterized in that, Hemp thread or polytetrafluoroethylene tape is wound around the external thread of the body.

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