A type of corrosion-resistant bolt

Abstract

This utility model provides an anti-corrosion bolt, relating to the field of bolt technology, comprising: a bolt head, wherein a hexagonal groove is formed at the axial center of the top surface of the bolt head, a sealing groove is formed at the center of the bottom surface of the inner end of the hexagonal groove, and a guide hole is formed at the axial center of the bottom surface of the inner end of the sealing groove, the guide hole penetrating the bottom end face of the bolt; the four guide grooves at the bottom of the bolt and the guide hole penetrating the bolt form a water guiding channel. When water seeps into the bottom of the threaded hole along the thread gap, it will enter the guide hole through the guide groove. With the help of the water-absorbing cotton strip in the guide hole, the accumulated water can be quickly absorbed, thus preventing water from accumulating in the thread gap and at the bottom of the threaded hole. This fundamentally reduces the risk of corrosion of the bolt and the threaded hole, and solves the problem that the annular gap formed by the bolt and the threaded hole of traditional bolts is also prone to water accumulation at the bottom of the threaded hole, causing local corrosion of the thread contact surface.

Description

Technical Field

[0001] This utility model relates to the field of bolt technology, and in particular to an anti-corrosion bolt. Background Technology

[0002] In outdoor construction, bridges, and offshore platforms, bolts are exposed to rain, dew, high-humidity air, or seawater for extended periods. Moisture accumulates along the hexagonal grooves on the bolt head and penetrates into the gap between the bolt and the threaded hole. If the bolt surface is not treated with long-term anti-corrosion measures (such as galvanizing or painting), or if the coating is damaged due to installation wear or long-term aging, moisture will react with the bolt material (mostly carbon steel or alloy steel) to form rust. The expansion of the rust will further compromise the thread fit accuracy, causing the bolt to loosen and even leading to displacement of connected components and structural instability.

[0003] Traditional bolts have a closed hexagonal groove structure with only an opening at the top for loading and unloading tools. There is no drainage channel at the bottom of the groove. When rainwater, dew, or ambient moisture enters the groove, it cannot drain naturally. Long-term accumulation will cause corrosion of the groove wall and bottom, which not only affects the appearance of the bolt, but may also increase the clearance between the wrench and the groove, resulting in a "slippage" phenomenon, making it impossible to properly disassemble or tighten the bolt. After the screw and the threaded hole are fitted, a small annular gap is formed between them. After water seeps in along the thread gap, due to gravity and structural constraints, it is easy to form a water accumulation area at the bottom of the threaded hole (the end of the screw), which is difficult to drain naturally. Long-term retention of water will cause localized corrosion of the thread contact surface. Utility Model Content

[0004] This utility model relates to an anti-corrosion bolt, which solves the problems of traditional bolts where the hexagonal closed groove is prone to water accumulation and corrosion due to the lack of drainage channels, and the annular gap formed by the screw and the threaded hole is also prone to water accumulation at the bottom of the threaded hole, causing local corrosion on the threaded contact surface.

[0005] This utility model provides a corrosion-resistant bolt, specifically comprising: a bolt head, wherein a hexagonal groove is formed at the axial center of the top surface of the bolt head, and a screw is fixedly installed at the axial center of the bottom surface of the bolt head; a sealing groove is formed at the center of the bottom surface of the hexagonal groove, and the sealing groove has a circular groove structure; a guide hole is formed at the axial center of the bottom surface of the sealing groove, and the guide hole is a circular hole that penetrates the bottom surface of the screw; four guide grooves are formed in a ring array on the bottom surface of the screw, and the guide grooves have a rectangular groove structure, one end of the guide groove is connected to the guide hole, and the other end of the guide hole penetrates the outer circumference of the screw.

[0006] Furthermore, a rubber sealing block is inserted into the sealing groove, a circular plate is fixedly installed on the bottom end face of the rubber sealing block, a plug rod is fixedly installed at the axial part of the bottom end face of the circular plate, and a spiral blade is fixedly installed on the outer circumference of the plug rod.

[0007] Furthermore, an absorbent cotton strip matching its structural dimensions is inserted into the guide hole, and an insertion groove is provided at the axial part of the top surface of the absorbent cotton strip; the insertion rod is screwed into the insertion groove through a spiral blade.

[0008] Furthermore, each of the six side end faces of the hexagonal groove has a drainage hole that penetrates the outer periphery of the bolt head at the middle part of the bottom edge, and the drainage hole is set at an angle.

[0009] This utility model provides a corrosion-resistant bolt, which has the following beneficial effects:

[0010] This invention features inclined drainage holes at the bottom edges of six side faces of a hexagonal groove, forming a directional drainage channel. When rainwater, dew, or ambient moisture enters the hexagonal groove, the accumulated water will flow naturally along the groove wall to the bottom of the groove, and then be quickly discharged from the outside of the bolt through the inclined drainage holes, thus solving the problem of head corrosion caused by water accumulation in the hexagonal groove of traditional bolts.

[0011] The four guide grooves at the bottom of the screw and the guide hole through the screw form a water channel. When water seeps into the bottom of the threaded hole along the thread gap, it will enter the guide hole through the guide groove. With the help of the water-absorbing cotton strip in the guide hole, it can quickly absorb the water and prevent the water from lingering in the thread gap and the bottom of the threaded hole, thus fundamentally reducing the risk of corrosion of the screw and the threaded hole. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly described below.

[0013] The accompanying drawings described below are only related to some embodiments of the present invention and are not intended to limit the scope of the present invention.

[0014] In the attached diagram:

[0015] Figure 1 A schematic diagram of the top isometric structure of this utility model is shown;

[0016] Figure 2 A schematic diagram of the bottom isometric structure of this utility model is shown;

[0017] Figure 3 A cross-sectional structural schematic diagram of the present invention is shown;

[0018] Figure 4 This utility model illustrates Figure 3 Schematic diagram of the structure with the rubber sealing block removed;

[0019] Figure 5 This diagram shows a top isometric view of the structure of the present invention in its disassembled state.

[0020] Figure 6 This diagram shows the bottom isometric structure of the present invention in its disassembled state;

[0021] List of reference numerals

[0022] 1. Bolt head; 101. Hexagonal groove; 102. Drain hole; 103. Screw; 104. Guide groove; 105. Sealing groove; 106. Guide hole; 2. Rubber sealing block; 201. Absorbent cotton strip; 202. Round plate; 203. Insert rod; 204. Spiral blade; 205. Insert groove. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the described embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0024] Example: Please refer to Figures 1 to 6 :

[0025] This utility model discloses an anti-corrosion bolt, comprising: a bolt head 1, a hexagonal groove 101 formed at the axial center of the top surface of the bolt head 1, a screw 103 fixedly installed at the axial center of the bottom surface of the bolt head 1, a sealing groove 105 formed at the center of the bottom surface of the inner end of the hexagonal groove 101, the sealing groove 105 having a circular groove structure; a guide hole 106 formed at the axial center of the bottom surface of the inner end of the sealing groove 105, the guide hole 106 being a circular hole, the guide hole 106 penetrating the bottom surface of the screw 103; and four guide grooves 104 formed in a circular array on the bottom surface of the screw 103, the guide grooves 104 having a rectangular groove structure, one end of the guide groove 104 communicating with the guide hole 106, the other end of the guide hole 106 penetrating the screw 103. 3. Outer circumference; A rubber sealing block 2 is inserted into the sealing groove 105. A circular plate 202 is fixedly installed on the bottom end face of the rubber sealing block 2. A plug rod 203 is fixedly installed at the axial part of the bottom end face of the circular plate 202. A spiral blade 204 is fixedly installed on the outer circumference of the plug rod 203. A water-absorbing cotton strip 201 matching its structural dimensions is inserted into the guide hole 106. A plug groove 205 is opened at the axial part of the top surface of the water-absorbing cotton strip 201. The plug rod 203 is screwed into the plug groove 205 through the spiral blade 204. A drainage hole 102 penetrating the outer circumference of the bolt head 1 is opened at the middle part of the bottom edge of the six side end faces of the hexagonal groove 101. The drainage hole 102 is set in an inclined shape.

[0026] The working principle of this embodiment:

[0027] This bolt has an active drainage channel by creating drainage holes 102 at the middle of the bottom edge of six side end faces of the hexagonal groove 101, which extend to the outer periphery of the bolt head 1. When rainwater or moisture enters the hexagonal groove 101, the water will flow along the inclined inner wall of the hexagonal groove 101 to the bottom of the groove, and then be quickly discharged to the outside of the bolt head 1 through the inclined drainage holes 102, thus preventing water from stagnating in the hexagonal groove 101 and reducing the risk of corrosion in the groove from the source.

[0028] Meanwhile, a rubber sealing block 2 is inserted into the sealing groove 105 at the bottom center of the hexagonal groove 101. The rubber sealing block 2 fits tightly against the inner wall of the sealing groove 105, which can effectively block external dust and impurities from entering the guide hole 106 below, avoid impurities from clogging the subsequent water absorption structure, and ensure the stable operation of the water absorption function.

[0029] The bottom end face of the screw 103 has four guide grooves 104 arranged in a ring array. One end of the guide groove 104 is connected to the guide hole 106 that passes through the screw 103, and the other end passes through the outer circumference of the screw 103. When the screw 103 of the bolt is engaged with the external threaded hole, when water flows along the thread gap to the bottom of the threaded hole, it will enter the guide groove 104 through the opening and flow along the guide groove 104 to the guide hole 106. Because the guide hole 106 is inserted with a water-absorbing cotton strip 201 that is perfectly matched with the hole structure size, the water-absorbing cotton strip 201 has high water absorption, so it can quickly absorb the water flowing into the guide hole 106 through the guide groove 104, and "actively absorb" the water at the bottom of the threaded hole, avoiding water from stagnating in the thread gap and the bottom of the threaded hole, fundamentally reducing the risk of corrosion of the screw 103 and the threaded hole.

[0030] A groove 205 is formed at the center of the top surface of the absorbent swab 201. The insertion rod 203 at the bottom of the rubber sealing block 2 is screwed into the groove 205 through the outer spiral blades 204. This not only achieves a fixed connection between the rubber sealing block 2 and the absorbent swab 201, preventing the absorbent swab 201 from shifting within the guide hole 106, but also facilitates daily maintenance: when the absorbent swab 201 is full of water or has aged, simply remove the rubber sealing block 2 to remove the absorbent swab 201 from the guide hole 106. The absorbent strip 201 is removed from the guide hole 106. Since the plug rod 203 is screwed into the plug groove 205 through the spiral blade 204, when it is pulled outward, the spiral blade 204 tightens and limits the movement, so that the absorbent strip 201 will not detach from the plug rod 203. When replacing it later, you only need to rotate the plug rod 203 outward along the plug groove 205 to separate the absorbent strip 201 from the plug rod 203, which makes it easy to replace the new absorbent strip 201.

Claims

1. An anticorrosion bolt, comprising a bolt head (1), a hexagonal slot (101) is formed in the axial center of the top end surface of the bolt head (1), a screw rod (103) is fixedly installed in the axial center of the bottom end surface of the bolt head (1), characterized in that, A sealing groove (105) is provided at the center of the bottom surface of the inner end of the hexagonal groove (101), and the sealing groove (105) has a circular groove structure; a guide hole (106) is provided at the axial center of the bottom surface of the inner end of the sealing groove (105), and the guide hole (106) is a circular hole that penetrates the bottom end face of the screw (103); four guide grooves (104) are provided in a ring array on the bottom end face of the screw (103), and the guide grooves (104) have a rectangular groove structure. One end of the guide groove (104) is connected to the guide hole (106), and the other end of the guide hole (106) penetrates the outer circumference of the screw (103).

2. The anti-corrosion bolt according to claim 1, characterized in that, A rubber sealing block (2) is inserted into the sealing groove (105). A circular plate (202) is fixedly installed on the bottom end face of the rubber sealing block (2). A plug rod (203) is fixedly installed at the axial part of the bottom end face of the circular plate (202). A spiral blade (204) is fixedly installed on the outer circumference of the plug rod (203).

3. The anti-corrosion bolt according to claim 2, characterized in that, A water-absorbing cotton strip (201) matching its structural dimensions is inserted into the guide hole (106). A insertion groove (205) is provided at the axial part of the top surface of the water-absorbing cotton strip (201). The insertion rod (203) is screwed into the insertion groove (205) through the spiral blade (204).

4. The anti-corrosion bolt according to claim 3, characterized in that, The six side end faces of the hexagonal groove (101) are each provided with a drainage hole (102) that penetrates the outer periphery of the bolt head (1) at the middle part of the bottom edge. The drainage hole (102) is set in an inclined shape.

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