Corrosion-resistant high-strength bolt and nut

Abstract

The utility model discloses a corrosion-resistant high-strength bolt and nut which comprises a bolt body, a nut body is sleeved on the outer wall of the bolt body, and the corrosion-resistant high-strength bolt and nut further comprises a sealing device. The corrosion-resistant high-strength bolt and nut relates to the technical field of bolts and nuts, the threads at the tail end of the bolt are protected through matching of the sealing ring, the sealing ring, the sealing cap, the connecting groove and the second internal threads, and the problem that in the actual use process, some bolts and nuts need to work in the corrosive environment, and the service life of the bolts and the nuts is prolonged is solved. After the bolt and the nut are matched to fix a mechanism needing to be fixed, the tail end, with threads, of the bolt may be exposed in a corrosive environment, the tail end of the threads is extremely prone to chemical reaction with a corrosive medium, the thread form may be damaged, the thread bearing area may be reduced, and then the pre-tightening force of bolt connection is reduced; and the loosening risk of the nut is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to bolt nut technical field, concretely is a kind of corrosion-resistant high-strength bolt nut. BACKGROUND

[0002] Nut is just cap, and bolt or screw rod is screwed together to be used to fasten the part, and all production and manufacture machinery must use a kind of part.

[0003] In daily production and manufacture, staff uses tool to fix the structure needing to be fixed by bolt and nut.

[0004] But in actual use process, some bolts and nuts need to work in corrosive environment, after bolt and nut cooperation fixed the mechanism needing to be fixed, the end of bolt with thread can be exposed in corrosive environment, thread end is prone to chemical reaction with corrosive medium, possibly thread tooth type is damaged, thread bearing area is reduced, in turn lead to the pre-tightening force of bolt connection drop, nut appears loose risk. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies of prior art, the utility model provides a kind of corrosion-resistant high-strength bolt nut, solve the problem that in actual use process, some bolts and nuts need to work in corrosive environment, after bolt and nut cooperation fixed the mechanism needing to be fixed, the end of bolt with thread can be exposed in corrosive environment, thread end is prone to chemical reaction with corrosive medium, possibly thread tooth type is damaged, thread bearing area is reduced, in turn lead to the pre-tightening force of bolt connection drop, nut appears loose risk.

[0006] To realize the above-mentioned purpose, the utility model is realized by the following technical scheme: a kind of corrosion-resistant high-strength bolt nut, including bolt body, the outer wall of bolt body is sleeved with nut body, corrosion-resistant high-strength bolt nut further includes sealing device, sealing device is set to the outer wall of bolt body;Reinforcing device is set between bolt body and nut body;Anti-skid device is set between reinforcing device;Wherein, the end of bolt body is protected by sealing device, the contact area between bolt body and nut body and fastened piece is increased by reinforcing device, the friction between bolt body and nut body and fastened piece is increased by anti-skid device.

[0007] Preferably, the sealing device comprises a sealing ring, the sealing ring is fixedly connected to the bottom of the nut body and sleeved to the outer wall of the bolt body; a sealing ring is sleeved to the outer wall of the sealing ring and fixedly connected to the bottom of the nut body; a sealing cap is sleeved to the outer wall of the bolt body and abuts to the bottom of the sealing ring; a connecting groove is arranged at the top of the sealing cap and sleeved to the outer wall of the sealing ring; a second internal thread is processed on the inner wall of the sealing cap and the inner wall is threadedly connected to the outer wall of the bolt body; wherein, the end of the bolt body is protected by the cooperation of the sealing ring, the sealing ring, the sealing cap, the connecting groove and the second internal thread.

[0008] Preferably, the inner wall of the nut body is processed with a first internal thread, and the inner wall of the first internal thread is threadedly connected to the outer wall of the bolt body.

[0009] Preferably, the reinforcing device comprises a reinforcing ring, the reinforcing ring is fixedly connected to the outer wall of the bolt body; a reinforcing seat is fixedly connected to the outer wall of the nut body; wherein, the contact area between the bolt body, the nut body and the fastened part is increased by the cooperation of the reinforcing ring and the reinforcing seat.

[0010] Preferably, the anti-skid device comprises a first anti-skid ring, the first anti-skid ring is fixedly connected to the bottom of the reinforcing ring and sleeved to the outer wall of the bolt body; a second anti-skid ring is fixedly connected to the top of the reinforcing seat and sleeved to the outer wall of the bolt body; wherein, the friction between the bolt body, the nut body and the fastened part is increased by the cooperation of the first anti-skid ring and the second anti-skid ring.

[0011] Advantages

[0012] The utility model provides a kind of corrosion-resistant high-strength bolt nut.It has the following advantages: the corrosion-resistant high-strength bolt nut realizes the protection of the thread of bolt end by the cooperation of sealing ring, sealing ring, sealing cap, connecting groove and second internal thread, solves the problem that some bolts and nuts need to work in corrosive environment during actual use, after the mechanism to be fixed is fixed by bolt and nut cooperation, the end of bolt with thread may be exposed in corrosive environment, the thread end is prone to chemical reaction with corrosive medium, which may damage thread form, reduce thread bearing area, and further cause the pre-tightening force of bolt connection to decrease and the nut to loosen.

[0013] The cooperation of reinforcing ring and reinforcing seat increases the contact area between bolt nut and fastened part, solves the problem that the contact area between traditional bolt and nut and fastened part is small, which causes local pressure to be too large, and the surface of fastened part is prone to indentation, depression or even crushing when pre-tightening force is applied to tighten bolt, which damages the strength and function of fastened part and further shortens the service life of fastened part. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the appearance schematic view of the utility model;

[0015] Figure 2 It is the installation schematic view of the utility model;

[0016] Figure 3 It is Figure 1 The structure schematic view of the sealing cap, the connecting groove and the second internal thread;

[0017] Figure 4 It is Figure 1 The structure schematic view of the nut body, the first internal thread and the sealing ring.

[0018] In the drawing: 1, bolt body; 2, nut body; 21, first internal thread; 3, sealing device; 31, sealing ring; 32, sealing ring; 33, sealing cap; 34, connecting groove; 35, second internal thread; 4, reinforcing device; 41, reinforcing ring; 42, reinforcing seat; 5, anti-skid device; 51, first anti-skid ring; 52, second anti-skid ring. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0020] In actual use, some bolts and nuts need to work in a corrosive environment. After the bolt and nut cooperate to fix the mechanism to be fixed, the threaded end of the bolt may be exposed to the corrosive environment. The threaded end is prone to chemical reaction with the corrosive medium, which may damage the thread form, reduce the thread bearing area, and further cause the pre-tightening force of the bolt connection to decrease, and the nut to loosen.

[0021] Therefore, the utility model provides a kind of corrosion-resistant high-strength bolt nut, solve the problem that some bolts and nuts need to work in a corrosive environment in actual use, after the bolt and nut cooperate to fix the mechanism to be fixed, the threaded end of the bolt may be exposed to the corrosive environment, the threaded end is prone to chemical reaction with the corrosive medium, which may damage the thread form, reduce the thread bearing area, and further cause the pre-tightening force of the bolt connection to decrease, and the nut to loosen.

[0022] Through the personnel in the art, the parts in the case are connected in turn, the specific connection and operation sequence should be referred to the working principle, the detailed connection means is the public technical knowledge in the art, the following mainly introduces the working principle and process.

[0023] Embodiment one: by Figures 1-4 It can be known that the corrosion-resistant high-strength bolt nut comprises a bolt body 1, characterized in that: a nut body 2 is sleeved on the outer wall of the bolt body 1, and the corrosion-resistant high-strength bolt nut further comprises a sealing device 3, a reinforcing device 4 and an anti-skid device 5, the sealing device 3 is arranged on the outer wall of the bolt body 1; the reinforcing device 4 is arranged between the bolt body 1 and the nut body 2; the anti-skid device 5 is arranged between the reinforcing devices 4; wherein the end of the bolt body 1 is protected through the sealing device 3, the contact area between the bolt body 1, the nut body 2 and the fastened part is increased through the reinforcing device 4, and the friction between the bolt body 1, the nut body 2 and the fastened part is increased through the anti-skid device 5;

[0024] In the specific implementation process, it is particularly worth pointing out that the bolt body 1 is similar to a 'T' shape as a whole, the top is an outer hexagonal, and according to actual needs, it can also be processed into an inner hexagonal, which can meet the work, the material of the bolt body 1 can be selected as duplex stainless steel, which has high strength, and the corrosion-resistant effect is achieved through the passivation film self-repairing capability, the nut body 2 is similar to the top of the bolt body 1 as a whole, and is a hexagonal structure, which is convenient for workers to fix, and the material thereof can be selected as corrosion-resistant stainless steel material, the end of the bolt body 1 is protected through the sealing device 3, and the threaded end is ensured not to be corroded, the contact area between the bolt body 1, the nut body 2 and the fastened part is increased through the reinforcing device 4, the local pressure is dispersed, the friction between the bolt body 1, the nut body 2 and the fastened part is increased through the anti-skid device 5, and the sealing between the bolt body 1, the nut body 2 and the fastened part can also be improved, so that the corrosion medium is prevented from entering and corroding the thread;

[0025] Further, the sealing device 3 comprises a sealing ring 31, a sealing ring 32, a sealing cap 33, a connecting groove 34 and a second internal thread 35, the sealing ring 31 is fixedly connected to the bottom of the nut body 2 and is sleeved on the outer wall of the bolt body 1; the sealing ring 32 is sleeved on the outer wall of the sealing ring 31 and is fixedly connected to the bottom of the nut body 2; the sealing cap 33 is sleeved on the outer wall of the bolt body 1 and is attached to the bottom of the sealing ring 32; the connecting groove 34 is formed in the top of the sealing cap 33 and is sleeved on the outer wall of the sealing ring 31; the second internal thread 35 is processed on the inner wall of the sealing cap 33 and is threadedly connected to the outer wall of the bolt body 1; wherein the end of the bolt body 1 is protected through the cooperation of the sealing ring 31, the sealing ring 32, the sealing cap 33, the connecting groove 34 and the second internal thread 35;

[0026] In the implementation process, it is worth pointing out that the sealing ring 31 is a whole annular shape, which is connected with the inner wall of the nut body 2, and its material can be selected as stainless steel material. Its surface is smooth, and the sealing precision can be improved by grinding. The sealing ring 32 is a whole hexagonal ring shape, and the sealing ring 32 is an engineering plastic composite ring body. The inner layer is PTFE, which is a corrosion-resistant main body. The outer layer is coated with fluororubber or silicone rubber. In order to provide elasticity, the bottom of the nut body 2 is tightly attached to the sealing cap 33 through the sealing ring 31, which effectively prevents the corrosive medium from entering between the nut body 2 and the sealing cap 33. The sealing cap 33 has the same cross section as the nut body 2, and its height is higher than that of the nut body 2. The sealing cap 33 and the nut body 2 can completely cover the position of the bolt body 1 outer wall with external threads. The material of the sealing cap 33 can be selected as stainless steel material. The size of the connecting groove 34 is the same as that of the sealing ring 31, which is used to accommodate the sealing ring 31. The sealing ring 31 and the sealing ring 32 work together to form two seals. The second internal thread 35 can be completely matched with the external thread of the bolt body 1. Through the cooperation of the sealing ring 31, the sealing ring 32, the sealing cap 33, the connecting groove 34 and the second internal thread 35, the end of the bolt body 1 is protected, and the service life of the corrosion-resistant high-strength bolt nut is improved.

[0027] Further, the inner wall of the nut body 2 is processed with the first internal thread 21, and the inner wall of the first internal thread 21 is connected with the outer wall of the bolt body 1.

[0028] In the implementation process, it is worth pointing out that the first internal thread 21 is completely the same as the second internal thread 35. The first internal thread 21 is connected with the sealing ring 31. The inner walls of the first internal thread 21 and the second internal thread 35 are sprayed with Teflon coating, which can not only reduce the friction coefficient, but also improve the corrosion resistance, thereby improving the stability of the corrosion-resistant high-strength bolt nut.

[0029] Specifically, when the corrosion-resistant high-strength bolt nut is needed, the worker inserts the bolt body 1 through the fixing hole of the fastening piece, rotates the nut body 2 counterclockwise, and the nut body 2 cooperates with the bolt body 1 to fix the fastening piece. After the nut body 2 is locked, the worker takes the sealing cap 33 and rotates it counterclockwise. The sealing cap 33 drives the second internal thread 35 to be connected with the outer wall of the bolt body 1, and the connecting groove 34 driven by the sealing cap 33 approaches the sealing ring 31 until the sealing ring 31 and the connecting groove 34 are completely attached. At the same time, as the sealing cap 33 gradually approaches the bottom of the nut body 2, the top of the sealing cap 33 is tightly attached to the sealing ring 32. At this time, the threaded part of the bolt body 1 outer wall is completely covered. After that, the worker can spray the whole with anticorrosive material to further improve the service life of the corrosion-resistant high-strength bolt nut.

[0030] Example two:Figures 1-4 It can be known that the reinforcing device 4 comprises a reinforcing ring 41 and a reinforcing seat 42, the reinforcing ring 41 is fixedly connected to the outer wall of the bolt body 1; the reinforcing seat 42 is fixedly connected to the outer wall of the nut body 2; wherein, through the cooperation of the reinforcing ring 41 and the reinforcing seat 42, the contact area between the bolt body 1 and the nut body 2 and the fastened part is increased;

[0031] In the specific implementation process, it is particularly worth pointing out that the material of the reinforcing ring 41 is the same as that of the bolt body 1, and the whole is a hexagonal ring, wherein the shape of the reinforcing ring 41 is not limited, and the shape of the reinforcing ring 41 is reasonably changed according to the actual situation, so that the reinforcing ring 41 can increase the contact area with the fastened part, and in use, the outer wall of the reinforcing ring 41 and the top of the bolt body 1 can be sprayed with a polytetrafluoroethylene coating to achieve corrosion resistance. The reinforcing seat 42 has the same effect as the reinforcing ring 41, and the cross section of the reinforcing seat 42 is trapezoidal, which has stronger load dispersion capability. Through the cooperation of the reinforcing ring 41 and the reinforcing seat 42, the contact area between the bolt body 1 and the nut body 2 and the fastened part is increased, and the local pressure can be relieved when the nut body 2 is tightened;

[0032] Further, the anti-skid device 5 comprises a first anti-skid ring 51 and a second anti-skid ring 52, the first anti-skid ring 51 is fixedly connected to the bottom of the reinforcing ring 41 and is sleeved on the outer wall of the bolt body 1; the second anti-skid ring 52 is fixedly connected to the top of the reinforcing seat 42 and is sleeved on the outer wall of the bolt body 1; wherein, through the cooperation of the first anti-skid ring 51 and the second anti-skid ring 52, the friction between the bolt body 1 and the nut body 2 and the fastened part is increased;

[0033] In the specific implementation process, it is particularly worth pointing out that the first anti-skid ring 51 and the second anti-skid ring 52 have the same shape, and both are made of fluorine rubber material, which has the effects of anti-skid and increasing friction in use. Through the cooperation of the first anti-skid ring 51 and the second anti-skid ring 52, the friction between the bolt body 1 and the nut body 2 and the fastened part is increased, and the sealing between the bolt body 1 and the nut body 2 and the fastened part is also improved;

[0034] Specifically, when the nut body 2 is counterclockwise rotated, the nut body 2 gradually approaches the fastened part penetrated by the bolt body 1 through the first internal thread 21, the nut body 2 drives the reinforcing seat 42 to move, the reinforcing seat 42 drives the second anti-skid ring 52 to move, the second anti-skid ring 52 is attached to the bottom of the fastened part, and the nut body 2 is continuously counterclockwise rotated to make the first anti-skid ring 51 and the second anti-skid ring 52 tightly abut against the fastened part. At this time, the sealing between the bolt body 1, the fastened part and the nut body 2 can be further improved.

[0035] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A corrosion resistant high strength bolt nut comprising a bolt body (1) characterized in that: The outer wall of the bolt body (1) is sleeved with a nut body (2), the corrosion-resistant high-strength bolt nut further comprises: A sealing device (3) is arranged on the outer wall of the bolt body (1); A reinforcing device (4) is arranged between the bolt body (1) and the nut body (2); An anti-skid device (5) is arranged between the reinforcing devices (4); Wherein, the end of the bolt body (1) is protected by the sealing device (3), the contact area between the bolt body (1) and the nut body (2) and the fastened part is increased by the reinforcing device (4), and the friction between the bolt body (1) and the nut body (2) and the fastened part is increased by the anti-skid device (5).

2. A corrosion resistant high strength bolt and nut as claimed in claim 1 wherein: The sealing device (3) comprises: A sealing ring (31) is fixedly connected to the bottom of the nut body (2) and sleeved on the outer wall of the bolt body (1); A sealing ring (32) is sleeved on the outer wall of the sealing ring (31) and fixedly connected to the bottom of the nut body (2); A sealing cap (33) is sleeved on the outer wall of the bolt body (1) and abuts against the bottom of the sealing ring (32); A connecting groove (34) is arranged on the top of the sealing cap (33) and sleeved on the outer wall of the sealing ring (31); A second internal thread (35) is arranged on the inner wall of the sealing cap (33) and is screw-connected to the outer wall of the bolt body (1); Wherein, the end of the bolt body (1) is protected by the cooperation of the sealing ring (31), the sealing ring (32), the sealing cap (33), the connecting groove (34) and the second internal thread (35).

3. A corrosion resistant high strength bolt and nut as claimed in claim 1 wherein: The inner wall of the nut body (2) is provided with a first internal thread (21), and the inner wall of the first internal thread (21) is screw-connected to the outer wall of the bolt body (1).

4. The corrosion resistant high strength bolt and nut of claim 1 wherein: The reinforcing device (4) comprises: A reinforcing ring (41) is fixedly connected to the outer wall of the bolt body (1); A reinforcing seat (42) is fixedly connected to the outer wall of the nut body (2); Wherein, the contact area between the bolt body (1) and the nut body (2) and the fastened part is increased by the cooperation of the reinforcing ring (41) and the reinforcing seat (42).

5. A corrosion resistant high strength bolt and nut as claimed in claim 4 wherein: The anti-skid device (5) comprises: A first anti-skid ring (51) is fixedly connected to the bottom of the reinforcing ring (41) and sleeved on the outer wall of the bolt body (1); A second anti-skid ring (52) is fixedly connected to the top of the reinforcing seat (42) and sleeved on the outer wall of the bolt body (1); Wherein, the friction between the bolt body (1) and the nut body (2) and the fastened part is increased by the cooperation of the first anti-skid ring (51) and the second anti-skid ring (52).

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