Bolt of composite sealing protective structure

Abstract

The utility model belongs to the technical field of bolts, and particularly relates to a bolt with a composite sealing protection structure, which comprises a bolt head and a bolt bar welded on the bolt head, a sealing mechanism is arranged on the lower surface of the bolt head, and the sealing mechanism comprises a nylon gasket. The nylon gasket seals a gap between the bolt head and a connected object through elastic deformation of the nylon gasket, the bolt head is protected by arranging the protection mechanism, the threaded outer surface of the anti-corrosion coating is coated with the anti-loosening coating, the friction force of threaded connection can be increased, the bolt is prevented from loosening automatically in the vibration environment, and the service life of the bolt is prolonged. The outer surface of the bolt head, the outer surface of the bolt rod and the outer surface of the insertion block are each coated with an anti-corrosion coating, a physical isolation barrier is formed, moisture, oxygen and corrosive media are prevented from making contact with a metal base body, and therefore corrosion is prevented, the anti-corrosion coatings are epoxy resin coatings, the corrosion environment can be effectively isolated, and the service life of the bolt under the severe condition is remarkably prolonged.

Description

Technical Field

[0001] This utility model relates to the field of bolt technology, and in particular to a bolt with a composite sealing and protective structure. Background Technology

[0002] Bolts, as fundamental components in the field of mechanical connections, are widely used in many industries such as automobiles, machinery and equipment, and aerospace. However, the sealing and protection of bolts has always been a technical challenge. Commonly used sealing and anti-loosening methods on the market are mainly friction anti-loosening, mechanical anti-loosening, and permanent anti-loosening. Friction anti-loosening methods include spring washers, double nut structures, or toothed bearing surfaces, while mechanical anti-loosening methods include slotted nuts, connected steel wires, and locking washers.

[0003] In the prior art, although spring washers and self-locking nuts can prevent loosening, their sealing performance is insufficient and cannot effectively prevent the leakage of liquids or gases. Furthermore, bolts are prone to chemical reactions with oxygen and moisture in the air in humid or corrosive environments, forming oxides. Corrosion can lead to bolt breakage or loosening, which in turn can cause equipment failure or safety accidents. Therefore, a bolt with a composite sealing and protective structure is proposed to solve the above-mentioned problems. Utility Model Content

[0004] In order to address the technical problems in the prior art where the sealing performance of spring washers and self-locking nuts is insufficient, failing to effectively prevent the leakage of liquids or gases, and where rust formation on bolts in humid or corrosive environments can lead to bolt breakage or loosening, thereby causing equipment failure or safety accidents, this application provides a bolt with a composite sealing and protective structure.

[0005] This utility model proposes a composite sealing and protective structure for a bolt, including a bolt head and a bolt shank welded to the bolt head. A sealing mechanism is provided on the lower surface of the bolt head, and the sealing mechanism includes a nylon washer. The nylon washer seals the gap between the bolt head and the connected object through its own elastic deformation.

[0006] The outer surface of the bolt head is provided with a protective mechanism, which includes an anti-corrosion coating. The anti-corrosion coating protects the bolt head by forming a physical isolation layer.

[0007] Preferably, the sealing mechanism further includes a mounting groove formed on the lower surface of the bolt head.

[0008] Preferably, the inner wall of the mounting groove is welded with an insert block, the nylon washer is slidably connected to the inner wall of the mounting groove, and the inner ring surface of the nylon washer is in contact with the outer surface of the bolt rod.

[0009] Preferably, the outer surface of the nylon washer has a slot, and the inner wall of the slot is slidably connected to the outer surface of the insert.

[0010] Preferably, the protective mechanism further includes an anti-loosening coating, which is applied to the threaded outer surface of the anti-corrosion coating.

[0011] Preferably, the anti-corrosion coating is applied to the outer surfaces of the bolt head, the bolt shank, and the insert, and the anti-corrosion coating is made of epoxy resin.

[0012] The beneficial effects of this utility model are as follows:

[0013] 1. By setting a sealing mechanism, the gap between the bolt head and the connected object is sealed. An installation groove is opened on the lower surface of the bolt head to provide a precise installation position and accommodation space for the nylon washer, ensuring its stable placement and guiding it to be evenly stressed. The nylon washer is slidably connected to the installation groove. A slot is opened on the nylon washer, and the insert on the bolt head is slidably connected to the slot to limit its movement and limit the rotation of the nylon washer. Since the nylon washer is firmly positioned and cannot rotate, when subjected to pressure applied to the upper surface of the bolt head and the upper surface of the connecting part, the washer can undergo uniform elastic deformation, effectively filling all the tiny gaps and uneven areas between the bolt head and the connecting part, thereby forming a stable and reliable sealing interface. This solves the technical problem in the prior art that although spring washers and self-locking nuts can prevent loosening, their sealing performance is insufficient and cannot effectively prevent the leakage of liquids or gases.

[0014] 2. By setting up a protective mechanism to protect the bolt head, an anti-loosening coating is applied to the outer surface of the anti-corrosion coating thread, which can increase the friction of the threaded connection and prevent the bolt from loosening on its own under vibration. The bolt head, bolt shank, and outer surface of the insert are all coated with an anti-corrosion coating, forming a physical isolation barrier to prevent moisture, oxygen, and corrosive media from contacting the metal substrate, thereby preventing rust. The anti-corrosion coating is made of epoxy resin, which can effectively isolate the corrosive environment and significantly extend the service life of the bolt under harsh conditions. This solves the technical problem in the prior art that bolts in humid or corrosive environments are prone to chemical reactions with oxygen and moisture in the air to form oxides, and rust can lead to bolt breakage or loosening, which in turn can cause equipment failure or safety accidents. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a bolt for a composite sealing and protective structure proposed in this utility model;

[0016] Figure 2 This is a perspective view of the anti-corrosion coating structure of a bolt in a composite sealing and protective structure proposed in this utility model.

[0017] Figure 3 A perspective view of the nylon washer structure of a bolt in a composite sealing and protective structure proposed in this utility model;

[0018] Figure 4 This is a perspective view of the bolt mounting groove structure of a composite sealing and protective structure proposed in this utility model.

[0019] In the diagram: 1. Bolt head; 11. Bolt shank; 2. Mounting groove; 3. Insert block; 31. Nylon washer; 4. Slot; 5. Anti-loosening coating; 51. Anti-corrosion coating. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] Reference Figures 1-4 A bolt with a composite sealing and protective structure includes a bolt head 1 and a bolt shank 11 welded to the bolt head 1. A sealing mechanism is provided on the lower surface of the bolt head 1. The sealing mechanism includes a nylon washer 31. The nylon washer 31 seals the gap between the bolt head 1 and the connected object through its own elastic deformation.

[0022] In order to provide a precise installation position and accommodating space for the nylon washer 31, the sealing mechanism also includes an installation groove 2, which is opened on the lower surface of the bolt head 1. The installation groove 2 is opened on the lower surface of the bolt head 1 to provide a precise installation position and accommodating space for the nylon washer 31, ensuring its stable placement and guiding it to be subjected to uniform force.

[0023] To ensure the strength and safety of the connection, a plug block 3 is welded to the inner wall of the mounting groove 2. A nylon washer 31 is slidably connected to the inner wall of the mounting groove 2. The inner surface of the nylon washer 31 contacts the outer surface of the bolt rod 11. It is fixed by welding the plug block 3 to the mounting groove 2. The nylon washer 31 is slidably connected to the mounting groove 2, and its inner ring contacts the outer surface of the bolt rod 11. While fixing it, it does not affect the removal of the nylon washer 31. The bolt head 1, bolt rod 11 and plug block 3 are all made of high-strength stainless steel, which can withstand large preload and working load and is not prone to plastic deformation or breakage, thereby ensuring the strength and safety of the connection.

[0024] To effectively fill all the tiny gaps and unevenness between the bolt head 1 and the connector, a slot 4 is provided on the outer surface of the nylon washer 31. The inner wall of the slot 4 is slidably connected to the outer surface of the insert 3. By opening the slot 4 on the nylon washer 31 and slidingly connecting the insert 3 on the bolt head 1 with the slot 4, the nylon washer 31 is limited and rotated. Since the nylon washer 31 is firmly positioned and cannot rotate, when subjected to pressure applied by the upper surface of the bolt head 1 and the upper surface of the connector, the washer can undergo uniform elastic deformation, effectively filling all the tiny gaps and unevenness between the bolt head 1 and the connector, thereby forming a stable and reliable sealing interface, preventing media leakage. At the same time, the compression generates pressure and resistance, thereby achieving an anti-loosening effect. This design makes the bolt less prone to loosening under vibration or external force, ensuring the stability of the connection.

[0025] By setting a sealing mechanism, the gap between the bolt head 1 and the connected object is sealed. An installation groove 2 is opened on the lower surface of the bolt head 1 to provide a precise installation position and accommodating space for the nylon washer 31, ensuring its stable placement and guiding it to be evenly stressed. The nylon washer 31 is slidably connected to the installation groove 2. A slot 4 is opened on the nylon washer 31, and the insert 3 on the bolt head 1 is slidably connected to the slot 4 to limit its movement and limit the rotation of the nylon washer 31. Since the nylon washer 31 is firmly positioned and cannot rotate, when subjected to pressure applied by the upper surface of the bolt head 1 and the upper surface of the connecting part, the washer can undergo uniform elastic deformation, effectively filling all the tiny gaps and uneven areas between the bolt head 1 and the connecting part, thereby forming a stable and reliable sealing interface. This solves the technical problem in the prior art that although spring washers and self-locking nuts can prevent loosening, their sealing performance is insufficient and cannot effectively prevent the leakage of liquids or gases.

[0026] In order to protect the bolt head 1, a protective mechanism is provided on the outer surface of the bolt head 1. The protective mechanism includes an anti-corrosion coating 51, which protects the bolt head 1 by forming a physical isolation layer.

[0027] To increase the friction of the threaded connection, the protective mechanism also includes an anti-loosening coating 5, which is applied to the outer surface of the thread of the anti-corrosion coating 51. The anti-loosening coating 5 is made of nylon 11, which has a low coefficient of friction and a certain degree of adhesion. It can increase the friction of the threaded connection and prevent the bolt from loosening on its own under vibration.

[0028] To extend the service life of bolts under harsh conditions, an anti-corrosion coating 51 is applied to the outer surfaces of the bolt head 1, bolt shank 11, and insert 3. The anti-corrosion coating 51 is made of epoxy resin. By coating the outer surfaces of the bolt head 1, bolt shank 11, and insert 3 with the anti-corrosion coating 51, a physical barrier is formed to prevent moisture, oxygen, and corrosive media from contacting the metal substrate, thereby preventing rust. The epoxy resin material of the anti-corrosion coating 51 effectively isolates the corrosive environment and significantly extends the service life of the bolts under harsh conditions.

[0029] By setting up a protective mechanism to protect the bolt head 1, the anti-loosening coating 5 is applied to the outer surface of the threaded anti-corrosion coating 51, which can increase the friction of the threaded connection and prevent the bolt from loosening on its own under vibration. The outer surfaces of the bolt head 1, bolt shank 11 and insert block 3 are all coated with anti-corrosion coating 51, forming a physical isolation barrier to prevent moisture, oxygen and corrosive media from contacting the metal substrate, thereby preventing rust. The anti-corrosion coating 51 is made of epoxy resin, which can effectively isolate the corrosive environment and significantly extend the service life of the bolt under harsh conditions. This solves the technical problem in the prior art that bolts in humid or corrosive environments are prone to chemical reactions with oxygen and moisture in the air to form oxides, and rust can lead to bolt breakage or loosening, which in turn can cause equipment failure or safety accidents.

[0030] Working principle: When manufacturing bolts, high-strength stainless steel is first used as the base material. The bolt head 1 and bolt shank 11 are manufactured separately through precision metal processing processes such as cold heading and turning, ensuring that the bolt shank 11 has precise threads. The bolt shank 11 and bolt head 1 are firmly connected by welding to form a complete bolt body structure. An installation groove 2 is precisely opened on the lower surface of the bolt head 1. The size and shape of the groove must match the nylon washer 31 to provide installation space. Multiple inserts 3 are fixed by welding on the inner wall of the installation groove 2. The outer surfaces of the bolt head 1, bolt shank 11 and welded inserts 3 that have completed the initial forming are cleaned. Then, a layer of anti-corrosion coating 51 is uniformly coated on their surfaces to form a physical isolation layer to resist environmental corrosion. Finally, an anti-loosening coating 5 is applied to the threaded outer surface of the bolt shank 11 coated with anti-corrosion coating 51 to increase the friction of the threaded connection and prevent the bolt from loosening under vibration conditions.

[0031] When using bolts, the nylon washer 31 with the slot 4 is slidably installed into the mounting groove 2 below the bolt head 1. At this time, the inner ring surface of the nylon washer 31 should be in contact with the outer surface of the bolt shank 11, and the slot 4 on its outer surface should be precisely slidably engaged with the insert block 3 on the inner wall of the mounting groove 2. Then, the worker passes the bolt through the object to be connected, ensuring that the nylon washer 31 is located between the bolt head 1 and the upper surface of one of the connecting parts, and uses tools to tighten the bolt, applying a preload.

[0032] As the bolt is tightened, the lower surface of the bolt head 1 applies vertical pressure to the nylon washer 31. Due to the excellent elastic deformation capability of the nylon washer 31, it is uniformly compressed and tightly fills all the tiny gaps and uneven areas between the lower surface of the bolt head 1 and the upper surface of the connector, thereby forming a reliable sealing interface and effectively preventing the leakage of liquid or gas media. The sliding connection between the slot 4 on the nylon washer 31 and the insert 3 in the mounting groove 2 plays a key role in rotational limiting, thereby ensuring that the nylon washer 31 will not rotate relative to the bolt head 1 when under pressure, thus ensuring that it can withstand pressure evenly and seal effectively.

[0033] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A bolt with a composite sealing and protective structure, comprising a bolt head (1) and a bolt shank (11) welded to the bolt head (1), characterized in that: The lower surface of the bolt head (1) is provided with a sealing mechanism, which includes a nylon washer (31). The nylon washer (31) seals the gap between the bolt head (1) and the connected object through its own elastic deformation. The outer surface of the bolt head (1) is provided with a protective mechanism, which includes an anti-corrosion coating (51). The anti-corrosion coating (51) protects the bolt head (1) by forming a physical isolation layer.

2. The bolt of the composite sealing and protective structure according to claim 1, characterized in that: The sealing mechanism also includes a mounting groove (2), which is formed on the lower surface of the bolt head (1).

3. The bolt of the composite sealing and protective structure according to claim 2, characterized in that: The inner wall of the mounting groove (2) is welded with a plug (3), and the nylon washer (31) is slidably connected to the inner wall of the mounting groove (2). The inner ring surface of the nylon washer (31) is in contact with the outer surface of the bolt rod (11).

4. The bolt of the composite sealing and protective structure according to claim 3, characterized in that: The outer surface of the nylon washer (31) is provided with a slot (4), and the inner wall of the slot (4) is slidably connected to the outer surface of the insert (3).

5. The bolt of the composite sealing and protective structure according to claim 1, characterized in that: The protective mechanism also includes an anti-loosening coating (5), which is applied to the threaded outer surface of the anti-corrosion coating (51).

6. The bolt of the composite sealing and protective structure according to claim 3, characterized in that: The anti-corrosion coating (51) is applied to the outer surfaces of the bolt head (1), the bolt shank (11) and the insert (3), and the anti-corrosion coating (51) is made of epoxy resin coating.

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