Corrosion-resistant fastener of multi-layer protection structure
Through multi-layered protective structures and component design, the problem of liquid seepage during fastener use has been solved, achieving higher sealing performance and safety, and extending service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-13
- Publication Date
- 2026-03-03
AI Technical Summary
When existing corrosion-resistant fasteners are in use, external liquids such as rainwater or corrosive media can easily seep into the joint between the bolt and the object, causing the fastener to corrode and reducing its service life.
It adopts a multi-layer protective structure, including a galvanized layer, an anti-corrosion layer, and a protective layer, combined with sealing components and buffer components. The sliding ring and support spring design of the sealing component prevents liquid from entering the gap, while the slider and telescopic spring design of the buffer component prevents excessive pressure during the screwing process from causing breakage.
It improves the sealing performance and service life of fasteners, prevents corrosion, increases installation safety and makes the screwing progress visible, and extends service life.
Smart Images
Figure CN223964747U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of corrosion-resistant fastener technology, specifically to a corrosion-resistant fastener with a multi-layer protective structure. Background Technology
[0002] Multi-layered protective corrosion-resistant fasteners are specifically designed to provide durable protection in harsh environments. They are commonly found in various industrial and engineering applications, especially in marine, chemical, wastewater treatment, and outdoor construction sectors where corrosion resistance is crucial. These fasteners effectively resist the erosion of corrosive substances in the environment through their multi-layered protective design, thereby extending their service life and reducing maintenance costs. Multi-layered protective corrosion-resistant fasteners enhance corrosion resistance by adding multiple layers of protective material to the surface of the metal substrate, forming one or more barriers to prevent corrosive substances from directly contacting the metal surface.
[0003] However, with existing corrosion-resistant fasteners, external liquids (such as rainwater and corrosive media) can easily seep into the joint between the bolt and the object, causing the fastener to corrode and reducing its service life. Utility Model Content
[0004] The technical problem to be solved by this utility model is as follows: to provide a corrosion-resistant fastener with a multi-layer protective structure that is highly practical, easy to operate, and has a simple structure, thereby solving the problem mentioned in the background art that when existing corrosion-resistant fasteners are used, external liquids (such as rainwater or corrosive media) can easily seep into the joint between the bolt and the object, causing the fastener to be corroded and reducing its service life.
[0005] The objective of this utility model can be achieved through the following technical solutions:
[0006] A corrosion-resistant fastener with a multi-layer protective structure includes a bolt body with a galvanized layer on its surface, a nut on one end of the bolt body, a protective cap on the surface of the nut, a sealing assembly fixedly connected inside the protective cap, and a buffer assembly slidably connected to the surface of the bolt body. The sealing assembly includes a positioning ring fixedly connected inside the protective cap, several sets of support springs fixedly connected to one side of the positioning ring, and a connecting ring fixedly connected to one end of each support spring. The buffer assembly includes two sets of sliders slidably connected to the surface of the bolt body, a support ring fixedly connected to one side of each slider, a telescopic spring fixedly connected to one side of each support ring, and a pressure ring fixedly connected to one end of each telescopic spring.
[0007] As a further embodiment of this utility model: the surface of the galvanized layer is coated with an anti-corrosion layer, and the surface of the anti-corrosion layer is coated with a protective layer. The anti-corrosion layer enhances the corrosion resistance.
[0008] As a further embodiment of this utility model: the anti-corrosion layer is made of ceramic coating material, and the protective layer is made of epoxy resin coating material. By setting the protective layer, the surface protection is increased.
[0009] As a further embodiment of this utility model: a sliding ring is sleeved on the surface of the connecting ring, and an insert ring is fixedly connected to one side of the sliding ring. The insert ring enhances the sealing performance.
[0010] As a further embodiment of this utility model: the insert ring is slidably connected to one side of the protective cap, and a slot adapted to the insert ring is provided on one side of the protective cap. The slot facilitates the insertion of the insert ring.
[0011] As a further embodiment of this utility model: the surface of the bolt body is provided with a sliding groove that matches the slider, and four sets of sliding rods are fixedly connected to one side of the support ring. The sliding rods facilitate the observation of the screw-in depth.
[0012] As a further embodiment of this utility model: the surfaces of the nut and the pressure ring are provided with sliding holes, and the sliding rod is slidably connected inside the sliding holes. The sliding holes facilitate the sliding of the sliding rod.
[0013] The beneficial effects of this utility model are:
[0014] 1. This multi-layered protective corrosion-resistant fastener, through the setting of sealing components and protective caps, allows the bolt body to be screwed into the corresponding object surface during use. The object surface then compresses the sliding ring, causing the insert ring to slide into the slot on the protective cap. Simultaneously, the sliding ring drives the connecting ring to compress the support spring, causing the support spring to compress the positioning ring and deform under force, generating elastic force that pushes the sliding ring in the opposite direction, making the sliding ring tightly adhere to the object surface. This increases the sealing effect of the protective cap, preventing liquids or impurities from entering the gap between the bolt body and the object surface, thus improving service life.
[0015] 2. This multi-layered protective corrosion-resistant fastener, through the setting of the buffer component, during use, as the bolt body is continuously screwed into the object surface, the object surface squeezes the support ring, and the slider slides in the groove on the bolt body. In turn, the support ring is forced to compress the telescopic spring, which in turn drives the pressure ring to squeeze the nut. The telescopic spring is then deformed by the force to generate elastic force, thereby avoiding bolt breakage or stretching due to excessive pressure during screwing. At the same time, the sliding rod protrudes from one end on the outside of the nut, allowing personnel to visually observe the screwing progress, thus improving the safety during installation. Attached Figure Description
[0016] The present invention will be further described below with reference to the accompanying drawings.
[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0018] Figure 2 This is a schematic diagram of the disassembled structure of this utility model;
[0019] Figure 3 This is a schematic diagram of the sealing assembly structure of this utility model;
[0020] Figure 4 This is a schematic diagram of the buffer component structure of this utility model;
[0021] Figure 5 This is a schematic diagram of the anti-corrosion layer and protective layer structure of this utility model.
[0022] In the diagram: 1. Bolt body; 2. Galvanized layer; 3. Nut; 4. Protective cap; 5. Sealing assembly; 501. Positioning ring; 502. Support spring; 503. Connecting ring; 6. Buffer assembly; 601. Slider; 602. Support ring; 603. Telescopic spring; 604. Pressure ring; 7. Anti-corrosion layer; 8. Protective layer; 9. Sliding ring; 10. Insert ring; 11. Sliding rod. Detailed Implementation
[0023] 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 skilled in the art without creative effort are within the protection scope of the present utility model.
[0024] like Figure 1-5As shown, a corrosion-resistant fastener with a multi-layer protective structure includes a bolt body 1, a galvanized layer 2 covering the surface of the bolt body 1, a nut 3 fitted onto one end of the bolt body 1, a protective cap 4 fitted onto the surface of the nut 3, and a sealing component 5 fixedly connected inside the protective cap 4. The sealing component 5 and the protective cap 4 enhance the sealing performance of the protective cap 4, preventing liquids or impurities from entering the gap between the bolt body 1 and the object surface, thus improving service life. A buffer component 6 is slidably connected to the surface of the bolt body 1. The buffer component 6 prevents excessive pressure during screwing, which could lead to bolt breakage or stretching. Meanwhile, the sliding rod 11 protrudes from one end on the outside of the nut 3, allowing personnel to visually observe the screwing progress and improving safety during installation. The sealing assembly 5 includes a positioning ring 501 fixedly connected inside the protective cap 4. Several sets of support springs 502 are fixedly connected to one side of the positioning ring 501, and a connecting ring 503 is fixedly connected to one end of the support springs 502. The buffer assembly 6 includes two sets of sliders 601 slidably connected to the surface of the bolt body 1. A support ring 602 is fixedly connected to one side of the slider 601, and a telescopic spring 603 is fixedly connected to one side of the support ring 602. A pressure ring 604 is fixedly connected to one end of the telescopic spring 603.
[0025] like Figure 5 As shown, the surface of the galvanized layer 2 is coated with an anti-corrosion layer 7, and the surface of the anti-corrosion layer 7 is coated with a protective layer 8. The anti-corrosion layer 7 is used to increase the corrosion resistance.
[0026] like Figure 5 As shown, the anti-corrosion layer 7 is made of ceramic coating material, and the protective layer 8 is made of epoxy resin coating material. The protective layer 8 is designed to increase surface protection.
[0027] like Figure 3 As shown, a sliding ring 9 is sleeved on the surface of the connecting ring 503, and an insert ring 10 is fixedly connected to one side of the sliding ring 9. The insert ring 10 is used to increase the sealing performance.
[0028] like Figure 3 As shown, the insertion ring 10 is slidably connected to one side of the protective cap 4. A slot adapted to the insertion ring 10 is provided on one side of the protective cap 4. The slot facilitates the insertion of the insertion ring 10.
[0029] like Figure 4 As shown, the surface of the bolt body 1 is provided with a sliding groove that matches the slider 601. Four sets of sliding rods 11 are fixedly connected to one side of the support ring 602. The sliding rods 11 facilitate the observation of the screw-in depth.
[0030] like Figure 4As shown, the surfaces of the nut 3 and the pressure ring 604 are provided with sliding holes, and the sliding rod 11 is slidably connected inside the sliding holes. The sliding holes facilitate the sliding of the sliding rod 11.
[0031] The working principle of this utility model is as follows: When in use, after the bolt body 1 is screwed into the corresponding object surface, the object surface squeezes the sliding ring 9, causing the insertion ring 10 to slide into the slot on the protective cap 4. At the same time as the squeeze, the sliding ring 9 drives the connecting ring 503 to squeeze the support spring 502, causing the support spring 502 to squeeze the positioning ring 501 and deform under force to generate elastic force, pushing the sliding ring 9 in the opposite direction, so that the sliding ring 9 is tightly attached to the object surface. When in use, as the bolt body 1 is continuously screwed into the object surface, the object surface squeezes the support ring 602, and the slider 601 slides in the groove on the bolt body 1. Then the support ring 602 is forced to squeeze the telescopic spring 603, and drives the pressure ring 604 to squeeze the nut 3. Then the telescopic spring 603 is forced to deform and generate elastic force.
[0032] It should be noted that the device structure and accompanying drawings of this utility model mainly describe the principle of this utility model. In terms of the technical aspects of this design principle, the setting of the power mechanism, power supply system and control system of the device is not fully described. However, under the premise that those skilled in the art understand the principle of the above utility model, the specific details of its power mechanism, power supply system and control system can be clearly understood. The control method in the application document is automatic control through a controller. The control circuit of the controller can be implemented by those skilled in the art through simple programming.
[0033] All standard parts used can be purchased from the market, and can be customized according to the instructions and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the existing technology. The machinery, parts and equipment adopt conventional models in the existing technology, and the structure and principle of the components known to those skilled in the art can be known by those skilled in the art through technical manuals or conventional experimental methods.
[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A corrosion-resistant fastener with a multi-layer protective structure, comprising a bolt body (1), characterized in that: The surface of the bolt body (1) is covered with a galvanized layer (2), and a nut (3) is fitted onto one end of the bolt body (1). A protective cap (4) is fitted onto the surface of the nut (3), and a sealing component (5) is fixedly connected inside the protective cap (4). A buffer component (6) is slidably connected to the surface of the bolt body (1). The sealing assembly (5) includes a positioning ring (501) fixedly connected inside the protective cap (4). A plurality of support springs (502) are fixedly connected to one side of the positioning ring (501), and a connecting ring (503) is fixedly connected to one end of the support springs (502). The buffer assembly (6) includes two sets of sliders (601) slidably connected to the surface of the bolt body (1). A support ring (602) is fixedly connected to one side of the slider (601), and a telescopic spring (603) is fixedly connected to one side of the support ring (602). A pressure ring (604) is fixedly connected to one end of the telescopic spring (603).
2. The corrosion-resistant fastener with a multi-layer protective structure according to claim 1, characterized in that, The surface of the zinc plating layer (2) is coated with an anti-corrosion layer (7), and the surface of the anti-corrosion layer (7) is coated with a protective layer (8).
3. The corrosion-resistant fastener with a multi-layer protective structure according to claim 2, characterized in that, The anti-corrosion layer (7) is made of ceramic coating material, and the protective layer (8) is made of epoxy resin coating material.
4. The corrosion-resistant fastener with a multi-layer protective structure according to claim 1, characterized in that, A sliding ring (9) is sleeved on the surface of the connecting ring (503), and a plug ring (10) is fixedly connected to one side of the sliding ring (9).
5. A corrosion-resistant fastener with a multi-layer protective structure according to claim 4, characterized in that, The insert ring (10) is slidably connected to one side of the protective cap (4), and a slot adapted to the insert ring (10) is provided on one side of the protective cap (4).
6. The corrosion-resistant fastener with a multi-layer protective structure according to claim 1, characterized in that, The surface of the bolt body (1) is provided with a sliding groove that is compatible with the slider (601), and four sets of sliding rods (11) are fixedly connected to one side of the support ring (602).
7. A corrosion-resistant fastener with a multi-layer protective structure according to claim 6, characterized in that, The surfaces of the nut (3) and the pressure ring (604) are provided with sliding holes, and the sliding rod (11) is slidably connected to the inside of the sliding holes.