Corrosion-resistant inside hexagonal bolt for marine pipeline

Abstract

The utility model relates to the technical field of inside hexagonal bolts, in particular to a corrosion-resistant inside hexagonal bolt for a marine pipeline. The utility model relates to a corrosion-resistant inside hexagonal bolt for a marine pipeline. The corrosion-resistant inside hexagonal bolt comprises an inside hexagonal bolt, in seawater, the zinc-rich coating can form a self-repairing corrosion-resistant protective layer, so that the service life of the inside hexagonal bolt is prolonged, and the screw head of the inside hexagonal bolt is wrapped in all directions through mutual cooperation of the first rubber sleeve, the second rubber sleeve, the first rubber ring and the second rubber ring, so that the screw head is prevented from being in contact with the seawater, and the service life of the inside hexagonal bolt is prolonged. Therefore, the corrosion-resistant effect is achieved; after a marine pipeline is fixed through the inner hexagon bolt, the first rubber sleeve can seal a connecting gap between the screw part of the inner hexagon bolt and a bolt hole of the pipeline, and after the inner hexagon bolt is screwed, the contact faces of the first rubber ring and the second rubber ring can be extruded to be tightly attached to each other; in this way, the tightness of wrapping the screw head of the inside hexagonal bolt can be further improved.

Description

Technical Field

[0001] This utility model relates to the field of internal hexagon bolt technology, specifically a corrosion-resistant internal hexagon bolt for marine pipelines. Background Technology

[0002] Bolt: A cylindrical threaded fastener used with a nut in mechanical parts. It consists of a head and a threaded shank, and is used to fasten two parts with through holes. This type of connection is called a bolted connection. Since the two parts can be separated by unscrewing the nut, a bolted connection is a detachable connection.

[0003] Chinese Patent No. CN215720078U discloses a corrosion-resistant internal hexagon bolt for marine pipelines, comprising a bolt body, a bolt shank, and a bolt head at the end of the bolt shank. The bolt head and bolt shank are provided with an anti-corrosion device. The anti-corrosion device includes a bolt shank rubber sleeve fitted onto the bolt shank near the bolt head end. The bolt shank rubber sleeve has a certain elasticity and its outer diameter is larger than the bolt shank diameter. A bolt head rubber washer is provided on the bolt shank near the bolt head end, which can mate with the bottom surface of the bolt head. A lower sealing connector is connected to the outer ring of the bolt head rubber washer. The lower sealing connector is fitted onto the bottom of the bolt head. An upper cover is detachably provided on the lower sealing connector, which can mate with the lower sealing connector to cover the bolt head. This invention can improve the corrosion resistance of the bolt head and enhance the safety of bolt use.

[0004] The existing technical solutions mentioned above have the following drawbacks: when the internal hex bolts are used to fix the pipeline on the seabed, they will come into contact with seawater. When the upper cover is screwed onto the bolt head, seawater is still present between the upper cover and the bolt head, which makes it difficult for the upper cover to provide good protection against seawater corrosion for the bolt head. In view of the above situation, technical innovation is carried out on the basis of existing corrosion-resistant internal hex bolts for marine pipelines. Utility Model Content

[0005] The purpose of this invention is to provide a corrosion-resistant internal hexagon bolt for marine pipelines to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a corrosion-resistant internal hexagon bolt for marine pipelines, comprising:

[0007] The socket head cap screw has a corrosion-resistant coating on its surface. A first rubber sleeve is tightly fitted onto the top of the outer side wall of the socket head cap screw. A first rubber ring is provided at the top of the first rubber sleeve. A second rubber sleeve is tightly fitted onto the outer side wall of the socket head cap screw. A second rubber ring is provided at the bottom of the second rubber sleeve.

[0008] Preferably, the first rubber ring is disposed at the bottom of the head of the internal hex bolt, and the top of the second rubber ring is in close contact with the bottom of the first rubber ring.

[0009] Preferably, the second rubber sleeve and the second rubber ring are integrally molded, and the first rubber sleeve and the first rubber ring are integrally molded.

[0010] Preferably, the inner wall of the first rubber ring is in close contact with the outer wall of the hexagon socket bolt, and the inner wall of the second rubber ring is in close contact with the outer wall of the first rubber sleeve.

[0011] Preferably, the first rubber sleeve, the second rubber sleeve, the first rubber ring, and the second rubber ring are made of corrosion-resistant rubber.

[0012] Preferably, the corrosion-resistant coating is a zinc-rich coating.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] In this invention, the zinc-rich coating can form a self-repairing corrosion-resistant protective layer in seawater, thereby extending the service life of the internal hex bolt. The screw head of the internal hex bolt is fully wrapped by the cooperation of the first rubber sleeve, the second rubber sleeve, the first rubber ring and the second rubber ring, thereby preventing it from contacting seawater and thus achieving a corrosion-resistant effect.

[0015] After the socket head cap screws secure the marine pipeline, the first rubber sleeve seals the gap between the screw portion of the socket head cap screw and the bolt hole of the pipeline. At the same time, when the socket head cap screws are tightened, the contact surfaces of the first rubber ring and the second rubber ring are compressed and fit tightly together, which can further improve the tightness of the socket head cap screw head and thus ensure the reliability of the device.

[0016] By utilizing the elasticity of the second rubber sleeve and the second rubber ring, it can be peeled off from the head of the internal hex bolt by pulling, thus ensuring convenient replacement. Attached Figure Description

[0017] Figure 1 This is a structural schematic diagram of a corrosion-resistant internal hexagon bolt for marine pipelines according to this utility model;

[0018] Figure 2 This is a front sectional view of a corrosion-resistant internal hexagon bolt for marine pipelines according to this utility model;

[0019] Figure 3 This is a partial sectional view of the front of a corrosion-resistant internal hexagon bolt for marine pipelines according to this utility model.

[0020] In the diagram: 1. Socket head cap screw; 11. First rubber sleeve; 12. Second rubber sleeve; 13. First rubber ring; 14. Second rubber ring. Detailed Implementation

[0021] 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.

[0022] Please see Figures 1-3 A corrosion-resistant hexagon socket head cap screw for marine pipelines includes a hexagon socket head cap screw 1. The surface of the hexagon socket head cap screw 1 is coated with a corrosion-resistant coating. A first rubber sleeve 11 is tightly fitted onto the top of the outer wall of the screw shank of the hexagon socket head cap screw 1. A first rubber ring 13 is fixedly installed on the top of the first rubber sleeve 11. A second rubber sleeve 12 is tightly fitted onto the outer wall of the screw head of the hexagon socket head cap screw 1. A second rubber ring 14 is fixedly installed on the bottom of the second rubber sleeve 12. The first rubber ring 13 is fixedly installed at the bottom of the screw head of the hexagon socket head cap screw 1. The top of the second rubber ring 14 is tightly fitted to the bottom of the first rubber ring 13. Through the cooperation of the first rubber sleeve 11, the second rubber sleeve 12, the first rubber ring 13, and the second rubber ring 14, the screw head of the hexagon socket head cap screw 1 is fully wrapped to prevent it from contacting seawater, thereby achieving a corrosion-resistant effect. When the hexagon socket head cap screw 1 fixes the marine pipeline, the first rubber sleeve 11 seals the connection gap between the screw shank of the hexagon socket head cap screw 1 and the bolt hole of the pipeline. When the socket head cap screw 1 is tightened, the contact surfaces of the first rubber ring 13 and the second rubber ring 14 will be compressed and tightly fitted, which can further improve the tightness of the wrapping of the socket head cap screw 1, thereby ensuring the reliability of the device. Utilizing the elasticity of the second rubber sleeve 12 and the second rubber ring 14, they can be pulled off from the socket head cap screw 1, thus ensuring convenient replacement. The second rubber sleeve 12 and the second rubber ring 14 are integrally molded, as are the first rubber sleeve 11 and the first rubber ring 13. The inner sidewall of the first rubber ring 13 is tightly fitted with the outer sidewall of the socket head cap screw 1, and the inner sidewall of the second rubber ring 14 is tightly fitted with the outer sidewall of the first rubber sleeve 11. The first rubber sleeve 11, the second rubber sleeve 12, the first rubber ring 13, and the second rubber ring 14 are made of corrosion-resistant rubber material, and the corrosion-resistant coating is a zinc-rich coating. In seawater, the zinc-rich coating can form a self-repairing corrosion-resistant protective layer, thereby extending the service life of the socket head cap screw 1.

[0023] Working principle: In seawater, the zinc-rich coating can form a self-repairing corrosion-resistant protective layer, thereby extending the service life of the socket head cap bolt 1. The head of the socket head cap bolt 1 is fully wrapped by the cooperation of the first rubber sleeve 11, the second rubber sleeve 12, the first rubber ring 13, and the second rubber ring 14, thus preventing it from contacting seawater and achieving a corrosion-resistant effect. After the socket head cap bolt 1 fixes the marine pipeline, the first rubber sleeve 11 seals the connection gap between the threaded part of the socket head cap bolt 1 and the bolt hole of the pipeline. At the same time, when the socket head cap bolt 1 is tightened, the contact surfaces of the first rubber ring 13 and the second rubber ring 14 are compressed and tightly fitted, which can further improve the tightness of the wrapping of the socket head cap bolt 1 head, thereby ensuring the reliability of the device. Utilizing the elasticity of the second rubber sleeve 12 and the second rubber ring 14, they can be pulled off the socket head cap bolt 1, thus ensuring convenient replacement.

Claims

1. A corrosion-resistant internal hexagonal bolt for marine pipelines, characterized in that, include: The socket head cap screw (1) has a corrosion-resistant coating on its surface. A first rubber sleeve (11) is tightly fitted on the top of the outer side wall of the socket head cap screw (1). A first rubber ring (13) is provided on the top of the first rubber sleeve (11). A second rubber sleeve (12) is tightly fitted on the outer side wall of the head of the socket head cap screw (1). A second rubber ring (14) is provided on the bottom of the second rubber sleeve (12).

2. The corrosion-resistant internal hexagon bolt for marine pipelines according to claim 1, characterized in that: The first rubber ring (13) is located at the bottom of the head of the internal hex bolt (1), and the top of the second rubber ring (14) is in close contact with the bottom of the first rubber ring (13).

3. The corrosion-resistant internal hexagon bolt for marine pipelines according to claim 1, characterized in that: The second rubber sleeve (12) and the second rubber ring (14) are integrally molded, and the first rubber sleeve (11) and the first rubber ring (13) are integrally molded.

4. The corrosion-resistant internal hexagonal bolt for marine pipelines according to claim 1, characterized in that: The inner wall of the first rubber ring (13) is tightly fitted with the outer wall of the screw of the internal hexagonal bolt (1), and the inner wall of the second rubber ring (14) is tightly fitted with the outer wall of the first rubber sleeve (11).

5. The corrosion-resistant internal hexagon bolt for marine pipelines according to claim 1, characterized in that: The first rubber sleeve (11), the second rubber sleeve (12), the first rubber ring (13), and the second rubber ring (14) are made of corrosion-resistant rubber.

6. The corrosion-resistant internal hexagon socket head cap bolt for marine pipelines according to claim 1, characterized in that: The corrosion-resistant coating is a zinc-rich coating.

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