Salt-spray-corrosion-resistant metal fastener

Abstract

The utility model discloses a salt spray corrosion prevention metal fastener which comprises a bolt, one end of the bolt is fixedly connected with a hexagon bolt head, the lower end of the hexagon bolt head is fixedly connected with an anti-seepage plate, the bolt is provided with three sets of nut mechanisms, two sets of nut mechanisms close to the hexagon bolt head are provided with protection mechanisms, and the two sets of nut mechanisms close to the hexagon bolt head are provided with anti-seepage plates. Each nut mechanism and the hexagon bolt head are provided with galvanized coatings, the nut mechanism closest to the hexagon bolt head comprises a first nut, a first limiting plate is fixedly connected to the first nut, and a circular groove is formed in the top of the end, close to the hexagon bolt head, of the first nut. The nut mechanism far away from the hexagon bolt head comprises a third nut, and the end, far away from the hexagon bolt head, of the third nut is fixedly connected with a protective cover. By arranging the protection mechanism, air is prevented from entering the nut, and the nut and a bolt making contact with the nut are prevented from being corroded by salt mist.

Description

Technical Field

[0001] The utility model relates to the technical field of metal fasteners, in particular to a metal fastener that is resistant to salt spray corrosion. Background Art

[0002] Salt spray corrosion is a common and most destructive atmospheric corrosion. The salt spray mentioned here refers to the chloride atmosphere, and its main corrosive component is the chloride salt in the ocean - sodium chloride, which mainly comes from the ocean and inland saline-alkali areas. The corrosion of salt spray on the surface of metal materials is caused by the chloride ions contained in it penetrating the oxide layer and protective layer on the metal surface and reacting electrochemically with the internal metal. At the same time, the chloride ions contain a certain hydration energy and are easily adsorbed in the pores and cracks on the metal surface to squeeze out and replace the oxygen in the chloride layer, turning the insoluble oxide into a soluble chloride, and turning the passive surface into an active surface.

[0003] Salt spray corrosion can easily cause rust on the surface of metal products, reducing the strength and bearing capacity of the metal. The commonly used method to prevent salt spray corrosion is to paint the surface of metal products. This method is easily worn out by external forces and becomes ineffective. For metal fasteners such as nuts and bolts, the internal friction between nuts and bolts makes it impossible to prevent salt spray corrosion by painting. Therefore, we need to consider how to solve this problem. Utility Model Content

[0004] The utility model aims to solve the problems in the background technology and proposes a metal fastener that is resistant to salt spray corrosion.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A salt spray corrosion resistant metal fastener comprises a bolt, one end of the bolt is fixedly connected to a hexagonal bolt head, and the lower end of the hexagonal bolt head is fixedly connected to an anti-seepage plate, three groups of nut mechanisms are arranged on the bolt, two groups of nut mechanisms close to the hexagonal bolt head are arranged with protective mechanisms, and each of the nut mechanisms and the hexagonal bolt head is provided with a galvanized coating.

[0007] Preferably, the nut mechanism closest to the hexagonal bolt head includes a first nut, a first limiting plate is fixedly connected to the first nut, and a circular groove is formed on the top of one end of the first nut close to the hexagonal bolt head.

[0008] Preferably, the nut mechanism located in the middle position includes a second nut, two second limit plates are fixedly connected to the outer side wall of the second nut, circular through grooves are opened on the upper and lower surfaces of the second nut, and the protective mechanism is located at the bottom of the first nut and the upper and lower ends of the second nut.

[0009] Preferably, the protective mechanism includes a gasket, one side of which is fixedly connected to a fixing plate, the gasket is inserted on the first nut or the second nut through the fixing plate, and three groups of liquid guide tubes are opened on the outer side wall of the gasket, and a sealing plug is provided at the outer opening of the liquid guide tube. The gasket is fixedly connected to a protective plate on the outside of a side close to the nut, and one side of the protective plate is in contact with the outer side of the first limiting plate or the second limiting plate.

[0010] Preferably, the nut mechanism away from the hexagonal bolt head comprises a third nut, and the third nut is fixedly connected to a protective cover at one end away from the hexagonal bolt head.

[0011] Preferably, the anti-seepage plate can be inserted into the circular groove on the top of the first nut.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. By setting up anti-seepage plates, circular grooves and protective mechanisms, after the locking parts are locked, air is blocked from entering the internal space of the nuts and bolts. At the same time, paraffin is introduced through the liquid guide tube to seal, which can prevent air from entering the thread groove inside the nut and reduce the direct wear of the nuts and bolts.

[0014] 2. Adding a galvanized coating to the hexagonal bolt head and nut mechanism can effectively reduce salt spray corrosion of metal fasteners.

[0015] In summary, the utility model effectively prevents salt spray corrosion of fasteners by adopting a galvanizing process and providing a protective mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of a salt spray corrosion resistant metal fastener proposed by the utility model;

[0017] Figure 2 This is a schematic diagram of the cross-sectional structure of a salt spray corrosion resistant metal fastener proposed by the utility model;

[0018] Figure 3 for Figure 2 Schematic diagram of the structure at point A in the middle.

[0019] Figure 4 for Figure 2 Schematic diagram of the structure at point B in the middle.

[0020] In the figure: 1 hexagonal bolt head, 2 bolts, 3 first nuts, 4 washers, 5 second nuts, 6 first limit plates, 7 sealing plugs, 8 third nuts, 9 protective covers, 10 anti-seepage plates, 11 round grooves, 12 liquid guide tubes, 13 fixing plates, 14 protective plates, and 15 second limit plates. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0022] Reference Figure 1-4 A salt spray corrosion resistant metal fastener comprises a bolt 2, one end of the bolt 2 is fixedly connected to a hexagonal bolt head 1, and the lower end of the hexagonal bolt head 1 is fixedly connected to an anti-seepage plate 10, the end of the anti-seepage plate 10 is provided with a rubber material, and three groups of nut mechanisms are provided on the bolt 2, wherein the two groups of nut mechanisms close to the hexagonal bolt head 1 are provided with protective mechanisms.

[0023] The nut mechanism closest to the hexagonal bolt head 1 includes a first nut 3, to which a first limiting plate 6 is fixedly connected. A circular groove 11 is formed at the top of the first nut 3 at one end close to the hexagonal bolt head 1. An anti-seepage plate 10 can be inserted into the circular groove 11 at the top of the first nut 3. The rubber material of the anti-seepage plate 10 abuts against the bottom of the circular groove 11, thereby preventing air from entering through the circular groove 11.

[0024] The nut mechanism located in the middle position includes a second nut 5, on the outer side wall of which are fixedly connected two second limit plates 15. Circular through grooves are provided on the upper and lower surfaces of the second nut 5, and the protective mechanism is located at the bottom of the first nut 3 and the upper and lower ends of the second nut 5.

[0025] A protective mechanism is provided at the bottom of the other end of the first nut 3 and the upper and lower end surfaces of the second nut 5, and the protective mechanism includes a gasket 4, one side of the gasket 4 is fixedly connected to a fixing plate 13, the gasket 4 is inserted on the first nut 3 or the second nut 5 through the fixing plate 13, and three groups of liquid guide tubes 12 are opened on the outer side wall of the gasket 4, and a sealing plug 7 is provided at the outer opening of the liquid guide tube 12, and the gasket 4 is fixedly connected to a protective plate 14 on the outside of a side close to the nut, and one side of the protective plate 14 is in contact with the outer side of the first limiting plate 6 or the second limiting plate 15.

[0026] The nut mechanism away from the hexagonal bolt head 1 comprises a third nut 8 , and a protective cover 9 is fixedly connected to the end of the third nut 8 away from the hexagonal bolt head 1 . Each nut mechanism and the hexagonal bolt head 1 are provided with a galvanized coating.

[0027] When the utility model is in use, the hexagonal bolt head 1 is rotated to insert the anti-seepage plate 10 into the circular groove 11, the gasket 4 is respectively placed on the first nut 3, the second nut 5, and the third nut 8, the second nut 5 is rotated to lock the fixed part with the first nut 3, paraffin is injected into between the bolt 2 and the nut thread groove through the liquid guide tube 12 to block the air from entering, and then the third nut 8 is rotated to allow the protective cover 9 to cover the bolt 2 extending from the second nut 5, so as to prevent the salt spray corrosion from spreading to the entire fastener through the bolt 2.

[0028] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A salt spray corrosion resistant metal fastener, comprising a bolt (2), characterized in that: One end of the bolt (2) is fixedly connected to a hexagonal bolt head (1), and the lower end of the hexagonal bolt head (1) is fixedly connected to an anti-seepage plate (10). Three groups of nut mechanisms are provided on the bolt (2), wherein two groups of nut mechanisms close to the hexagonal bolt head (1) are provided with protective mechanisms, and each of the nut mechanisms and the hexagonal bolt head (1) is provided with a galvanized coating.

2. The salt spray corrosion resistant metal fastener according to claim 1, characterized in that: The nut mechanism closest to the hexagonal bolt head (1) comprises a first nut (3), to which a first limiting plate (6) is fixedly connected, and a circular groove (11) is formed at the top of one end of the first nut (3) close to the hexagonal bolt head (1).

3. The salt spray corrosion resistant metal fastener according to claim 2, characterized in that: The nut mechanism located in the middle position comprises a second nut (5), two second limit plates (15) are fixedly connected to the outer side wall of the second nut (5), and circular through grooves are provided on the upper and lower surfaces of the second nut (5). The protective mechanism is located at the bottom of the first nut (3) and the upper and lower ends of the second nut (5).

4. The salt spray corrosion resistant metal fastener according to claim 3, characterized in that: The protective mechanism comprises a gasket (4), one side of the gasket (4) is fixedly connected to a fixing plate (13), the gasket (4) is inserted on the first nut (3) or the second nut (5) through the fixing plate (13), and three groups of liquid guide tubes (12) are opened on the outer side wall of the gasket (4), and a sealing plug (7) is provided at the outer opening of the liquid guide tube (12), and the gasket (4) is fixedly connected to a protective plate (14) on the outer side of a side close to the nut, and one side of the protective plate (14) is in contact with the outer side of the first limiting plate (6) or the second limiting plate (15).

5. The salt spray corrosion resistant metal fastener according to claim 1, characterized in that: The nut mechanism away from the hexagonal bolt head (1) comprises a third nut (8), and the third nut (8) is fixedly connected to a protective cover (9) at one end away from the hexagonal bolt head (1).

6. The salt spray corrosion resistant metal fastener according to claim 2, characterized in that: The anti-seepage plate (10) can be inserted into the circular groove (11) at the top of the first nut (3).

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