Anti-corrosion lock nut

Abstract

The utility model relates to the technical field of lock nuts, and discloses an anti-corrosion lock nut which comprises a swivel pipe, a second straight pipe, a protective pipe and a movable ring, one end of the swivel pipe is fixedly connected with a first straight pipe, the first straight pipe is in threaded connection with the second straight pipe, and one end, away from the first straight pipe, of the second straight pipe is fixedly connected with a fixed ring. The side face, close to the second straight pipe, of the fixing ring is fixedly connected with a limiting ring, the limiting ring is located on the outer ring side of the second straight pipe, and the protection pipe comprises a chlorosulfonated polyethylene coating layer, a reinforcing layer and an aluminum triphosphate coating layer. When in use, the protective pipe is slidably arranged on the outer surface of the circumference of the straight pipe II, so that the lock nut has corrosion resistance, and the technical problem that in the prior art, the area where water and electricity lines are located is generally high in humidity, the surface of the lock nut is not protected, so that oxidation reaction is prone to occurring, and the lock nut is corroded is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of lock nuts, and particularly relates to an anti-corrosion lock nut. Background Art

[0002] During the renovation and installation of water and electricity lines, the lock nut is a standard accessory for connecting the bottom box and the wire pipe. Its main function is to accurately align the holes of the wire pipe and the bottom box, make the installation of the wire pipe and the bottom box more firm, ensure smooth wire pulling, prevent hole deviation, and facilitate later maintenance and replacement of the lines.

[0003] Since the area where the water and electricity lines are located generally has a high humidity, the surface of the lock nut is not protected, which easily leads to an oxidation reaction, and then causes the lock nut to be corroded. Content of the Utility Model

[0004] Technical Problem to be Solved

[0005] In view of the above-mentioned drawbacks of the prior art, the utility model provides an anti-corrosion lock nut, which solves the technical problem that in the prior art, the area where the water and electricity lines are located generally has a high humidity, and the surface of the lock nut is not protected, which easily leads to an oxidation reaction, and then causes the lock nut to be corroded.

[0006] Technical Solution

[0007] To achieve the above object, the utility model is realized through the following technical solutions:

[0008] The utility model provides an anti-corrosion lock nut, which includes a swivel tube, a straight tube II, a protective tube, and a movable ring; one end of the swivel tube is fixedly connected to a straight tube I, an external thread is provided on the circumferential outer surface of the straight tube I, an internal thread is provided on the circumferential inner surface of the straight tube II, and the straight tube I is threadedly connected to the straight tube II; one end of the straight tube II away from the straight tube I is fixedly connected to a fixing ring, a limiting ring is fixedly connected to one side surface of the fixing ring close to the straight tube II, and the limiting ring is located on the outer ring side of the straight tube II; the protective tube is slidably arranged on the circumferential outer surface of the straight tube II and is located on the inner ring side of the limiting ring. The protective tube includes a chlorosulfonated polyethylene coating layer, a reinforcing layer, and a tripolyphosphate aluminum coating layer which are arranged in sequence from the inside to the outside; the reinforcing layer includes a nickel-tungsten alloy layer, a glass fiber layer, and an epoxy zinc-rich primer layer which are arranged in sequence from the inside to the outside; the movable ring is coaxially arranged with the fixing ring, and a plurality of spring I are arranged circumferentially between the two.

[0009] Further, the movable ring is located on the inner ring side of the limiting ring, and one end surface of the protective tube abuts against the side surface of the movable ring away from the spring I.

[0010] Further, two spring II are symmetrically and fixedly connected to the circumferential outer surface of the limiting ring. One end of the spring II away from the limiting ring is connected to a straight plate, and a sealing member is fixedly connected to one side surface of the straight plate.

[0011] Further, the seal is of an arc structure, and the arc concave surfaces of the two seals are arranged opposite to each other.

[0012] Further, the material of the seal is one of ethylene propylene diene monomer rubber, chlorinated butyl rubber, nitrile rubber or silicone rubber.

[0013] Further, a telescopic rod is arranged inside the second spring. One end of the telescopic rod is fixedly connected to the straight plate, and the other end of the telescopic rod is fixedly connected to the circumferential outer surface of the limiting ring.

[0014] Beneficial effects

[0015] The technical solution provided by the present utility model has the following beneficial effects compared with the prior art:

[0016] 1. By providing a protective tube, through the setting of the chlorosulfonated polyethylene coating layer, the protective tube has the characteristics of good ozone resistance, chemical corrosion resistance, oil resistance, heat resistance, light resistance and wear resistance; through the setting of the aluminum tripolyphosphate coating layer, the protective tube has wide applicability, non-toxicity and good thermal stability, and at the same time has the effects of rust prevention, corrosion prevention and flame retardancy; through the setting of the nickel-tungsten alloy layer, the protective tube has an alloy with a high melting point, high hardness and high corrosion resistance; through the setting of the glass fiber layer, the protective tube has the characteristics of good insulation, strong heat resistance, good corrosion resistance and high mechanical strength; through the setting of the epoxy zinc-rich primer layer, the protective tube has good mechanical properties, high hardness, good plasticity, water resistance, rust prevention and corrosion resistance. When in use, by sliding the protective tube on the circumferential outer surface of the second straight tube, the lock nut has corrosion resistance, solving the technical problem that the area where the water and electricity wires are located is generally humid in the prior art, and the surface of the lock nut has no protection, resulting in its easy oxidation reaction and further causing corrosion of the lock nut.

[0017] 2. By providing that one end surface of the protective tube abuts against the side surface of the movable ring away from the first spring, due to the tension of the first spring, the protective tube tightly adheres to the surface at the bottom box hole position, preventing moisture from penetrating into the contact surfaces of the lock nut with the bottom box and the wire pipe and the surfaces of the first straight tube and the second straight tube, further enhancing the corrosion resistance of the lock nut, and at the same time facilitating the installation and replacement of the protective tube.

[0018] 3. By providing two seals, due to the tension of the second spring, the arc concave surfaces of the two seals tightly adhere to the circumferential side surface of the wire pipe, preventing moisture from penetrating into the contact surfaces of the lock nut with the wire pipe and the surfaces of the first straight tube and the second straight tube, further enhancing the corrosion resistance of the lock nut. Description of the drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0020] Figure 1 It is a perspective three-dimensional structural schematic diagram of an anti-corrosion lock nut according to this embodiment;

[0021] Figure 2 For Figure 1 It is a schematic diagram of the partial enlarged structure at A in

[0022] Figure 3 It is another perspective three-dimensional structural schematic diagram of an anti-corrosion lock nut according to this embodiment;

[0023] Figure 4 It is a three-dimensional structural schematic diagram of the connection of the second straight pipe, the fixing ring, the limiting ring, the movable ring, and the first spring;

[0024] Figure 5 For Figure 4 It is a schematic diagram of the partial enlarged structure at B in

[0025] Figure 6 It is a cross-sectional view of the inside of the protective pipe;

[0026] Figure 7 It is a cross-sectional view of the inside of the reinforcing layer.

[0027] The reference numerals in the figure respectively represent: 1, the rotating head pipe; 2, the first straight pipe; 3, the second straight pipe; 4, the fixing ring; 5, the limiting ring; 6, the protective pipe; 7, the movable ring; 8, the first spring; 9, the second spring; 10, the straight plate; 11, the seal; 12, the telescopic rod; 21, the external thread; 31, the internal thread; 61, the chlorosulfonated polyethylene coating layer; 62, the reinforcing layer; 63, the aluminum tripolyphosphate coating layer; 621, the nickel-tungsten alloy layer; 622, the glass fiber layer; 623, the epoxy zinc-rich primer layer. Specific embodiments

[0028] In order to make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0029] The present utility model will be further described below in conjunction with embodiments.

[0030] Embodiment:

[0031] Please refer to Figures 1-7 , the present utility model provides a technical solution: an anti-corrosion lock nut, including a rotating head tube 1, a straight tube two 3, a protective tube 6, and a movable ring 7.

[0032] One end of the rotating head tube 1 is fixedly connected to a straight tube one 2. An external thread 21 is provided on the circumferential outer surface of the straight tube one 2, and an internal thread 31 is provided on the circumferential inner surface of the straight tube two 3. By rotating the rotating head tube 1, the straight tube one 2 is threadedly connected inside the straight tube two 3 (the internal thread 31 meshes with the external thread 21).

[0033] One end of the straight tube two 3 away from the straight tube one 2 is fixedly connected to a fixing ring 4, and the circumferential inner side surface of the fixing ring 4 is fixedly connected to the circumferential outer side surface of the straight tube two 3. A limiting ring 5 is fixedly connected to one side surface of the fixing ring 4 close to the straight tube two 3, and the limiting ring 5 is located on the outer ring side of the straight tube two 3.

[0034] The protective tube 6 is slidably arranged on the circumferential outer surface of the straight tube two 3 and is located on the inner ring side of the limiting ring 5. The protective tube 6 includes a chlorosulfonated polyethylene coating layer 61, a reinforcing layer 62, and a tripolyphosphate aluminum coating layer 63 arranged in sequence from the inside to the outside. Preferably, the thickness of the chlorosulfonated polyethylene coating layer 61 can be set to be less than the thickness of the reinforcing layer 62, and the thickness of the reinforcing layer 62 is less than the thickness of the tripolyphosphate aluminum coating layer 63.

[0035] Through the setting of the chlorosulfonated polyethylene coating layer 61, the protective tube 6 has the characteristics of good ozone resistance, chemical corrosion resistance, oil resistance, heat resistance, light resistance, and wear resistance. Through the setting of the tripolyphosphate aluminum coating layer 63, the protective tube 6 has a wide range of applicability, non-toxicity, and good thermal stability, and at the same time has the effects of rust prevention, corrosion prevention, and flame retardancy.

[0036] Preferably, the reinforcing layer 62 includes a nickel-tungsten alloy layer 621, a glass fiber layer 622, and an epoxy zinc-rich primer layer 623 arranged in sequence from the inside to the outside. Preferably, the thickness of the nickel-tungsten alloy layer 621 can be set to be less than the thickness of the glass fiber layer 622, and the thickness of the glass fiber layer 622 is greater than the thickness of the epoxy zinc-rich primer layer 623.

[0037] Through the setting of the nickel-tungsten alloy layer 621, the protective tube 6 has an alloy with a high melting point, high hardness, and high corrosion resistance. Through the setting of the glass fiber layer 622, the protective tube 6 has the characteristics of good insulation, strong heat resistance, good corrosion resistance, and high mechanical strength. Through the setting of the epoxy zinc-rich primer layer 623, the protective tube 6 has good mechanical properties, high hardness, good plasticity, water resistance, rust prevention, and erosion resistance.

[0038] The movable ring 7 is located between the inner ring side of the limiting ring 5 and the outer ring side of the second straight pipe 3. The movable ring 7 is coaxially arranged with the fixed ring 4, and a plurality of first springs 8 are arranged circumferentially between the two. One end of the first spring 8 is connected to the movable ring 7, and the other end of the first spring 8 is connected to the fixed ring 4. One end face of the protective pipe 6 abuts against the side face of the movable ring 7 away from the first spring 8.

[0039] Two second springs 9 are symmetrically and fixedly connected to the circumferential outer surface of the limiting ring 5. One end of the second spring 9 away from the limiting ring 5 is connected to a straight plate 10, and a sealing member 11 is fixedly connected to one side face of the straight plate 10.

[0040] The sealing member 11 is of an arc-shaped structure, and the arc concave surfaces of the two sealing members 11 are arranged opposite to each other, facilitating the arc concave surfaces of the two sealing members 11 to closely adhere to the circumferential side face of the wire pipe.

[0041] Preferably, the material of the sealing member 11 is one of ethylene propylene diene monomer rubber, chlorinated butyl rubber, nitrile rubber or silicone rubber. The sealing member 11 has good sanitary and environmental protection performance, long service life and strong sealing performance.

[0042] A telescopic rod 12 is arranged inside the second spring 9. One end of the telescopic rod 12 is fixedly connected to the straight plate 10, and the other end of the telescopic rod 12 is fixedly connected to the circumferential outer surface of the limiting ring 5. The telescopic rod 12 facilitates the straight-line movement of the straight plate 10.

[0043] The working principle and usage process of this embodiment are as follows:

[0044] The first step: First, place the rotating head pipe 1 in the bottom box, and place the second straight pipe 3 outside the bottom box;

[0045] The second step: Insert the protective pipe 6 between the inner ring side of the limiting ring 5 and the outer ring side of the second straight pipe 3, and then press the protective pipe 6 to make the movable ring 7 move towards the direction close to the fixed ring 4, thereby compressing the first spring 8;

[0046] The third step: Pass the first straight pipe 2 through the hole of the bottom box, and then rotate the first straight pipe 2 to threadedly install the first straight pipe 2 inside the second straight pipe 3;

[0047] The fourth step: Release the protective pipe 6. Due to the tension of the first spring 8, the protective pipe 6 tightly adheres to the surface at the hole position of the bottom box, preventing moisture from penetrating into the contact surfaces between the lock nut and the bottom box, the wire pipe, and the surfaces of the first straight pipe 2 and the second straight pipe 3, further enhancing the corrosion resistance of the lock nut, and at the same time facilitating the installation and replacement of the protective pipe 6;

[0048] The fifth step: Pull the sealing member 11 to make the two sealing members 11 move away from each other, compress the second spring 9, and then pass the wire pipe through the second straight pipe 3, the first straight pipe 2, and the rotating head pipe 1 in sequence;

[0049] Step 6: Loosen the two seals 11. Due to the tension of the second spring 9, the arc concave surfaces of the two seals 11 closely adhere to the circumferential side surface of the wire pipe, preventing moisture from penetrating into the contact surface between the locknut and the wire pipe and the surfaces of the first straight pipe 2 and the second straight pipe 3, further enhancing the corrosion resistance of the locknut.

[0050] In summary, compared with the prior art, the embodiments of the present utility model have the following beneficial effects:

[0051] 1. By providing the protective pipe 6, due to the setting of the chlorosulfonated polyethylene coating layer 61, the protective pipe 6 has the characteristics of good ozone resistance, chemical corrosion resistance, oil resistance, heat resistance, light resistance and wear resistance; due to the setting of the aluminum tripolyphosphate coating layer 63, the protective pipe 6 has wide applicability, non-toxicity and good thermal stability, and at the same time has the effects of rust prevention, corrosion prevention and flame retardancy; due to the setting of the nickel-tungsten alloy layer 621, the protective pipe 6 has an alloy with a high melting point, high hardness and high corrosion resistance; due to the setting of the glass fiber layer 622, the protective pipe 6 has the characteristics of good insulation, strong heat resistance, good corrosion resistance and high mechanical strength; due to the setting of the epoxy zinc-rich primer layer 623, the protective pipe 6 has good mechanical properties, high hardness, good plasticity, water resistance, rust prevention and erosion resistance. When in use, by sliding the protective pipe 6 on the circumferential outer surface of the second straight pipe 3, the locknut has corrosion resistance, solving the technical problem in the prior art that the area where the water and electricity wires are located generally has a high humidity, and the surface of the locknut has no protection, resulting in its easy oxidation reaction, and then causing the locknut to be corroded.

[0052] 2. By providing one end surface of the protective pipe 6 to abut against the side surface of the movable ring 7 away from the first spring 8, due to the tension of the first spring 8, the protective pipe 6 closely adheres to the surface at the bottom box hole position, preventing moisture from penetrating into the contact surface between the locknut and the bottom box and the wire pipe and the surfaces of the first straight pipe 2 and the second straight pipe 3, further enhancing the corrosion resistance of the locknut, and at the same time facilitating the installation and replacement of the protective pipe 6.

[0053] 3. By providing two seals 11, due to the tension of the second spring 9, the arc concave surfaces of the two seals 11 closely adhere to the circumferential side surface of the wire pipe, preventing moisture from penetrating into the contact surface between the locknut and the wire pipe and the surfaces of the first straight pipe 2 and the second straight pipe 3, further enhancing the corrosion resistance of the locknut.

[0054] The above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present utility model.

Claims

1. An anti-corrosion lock nut, characterized in that, It includes a swivel tube (1), a straight tube II (3), a protective tube (6), and a movable ring (7); One end of the swivel tube (1) is fixedly connected to a straight tube I (2). An external thread (21) is provided on the circumferential outer surface of the straight tube I (2), and an internal thread (31) is provided on the circumferential inner surface of the straight tube II (3). The straight tube I (2) is threadedly connected to the straight tube II (3); One end of the straight tube II (3) away from the straight tube I (2) is fixedly connected to a fixing ring (4). A limiting ring (5) is fixedly connected to one side surface of the fixing ring (4) close to the straight tube II (3). The limiting ring (5) is located on the outer ring side of the straight tube II (3); The protective tube (6) is slidably arranged on the circumferential outer surface of the straight tube II (3) and is located on the inner ring side of the limiting ring (5). The protective tube (6) includes a chlorosulfonated polyethylene coating layer (61), a reinforcing layer (62), and an aluminum tripolyphosphate coating layer (63) arranged in sequence from the inside to the outside; The reinforcing layer (62) includes a nickel-tungsten alloy layer (621), a glass fiber layer (622), and an epoxy zinc-rich primer layer (623) arranged in sequence from the inside to the outside; The movable ring (7) is coaxially arranged with the fixing ring (4), and a number of first springs (8) are arranged circumferentially between the two; 2. The anti-corrosion lock nut according to claim 1, characterized in that, The movable ring (7) is located on the inner ring side of the limiting ring (5), and one end surface of the protective tube (6) abuts against the side surface of the movable ring (7) away from the first springs (8); 3. An anti-corrosion lock nut according to claim 1, characterized in that, Two second springs (9) are symmetrically and fixedly connected to the circumferential outer surface of the limiting ring (5). One end of the second spring (9) away from the limiting ring (5) is connected to a straight plate (10), and a sealing member (11) is fixedly connected to one side surface of the straight plate (10); 4. The anti-corrosion lock nut according to claim 3, characterized in that, The sealing member (11) is of an arc-shaped structure, and the arc concave surfaces of the two sealing members (11) are arranged oppositely; 5. The corrosion-resistant lock nut according to claim 4, characterized in that, The material of the sealing member (11) is one of ethylene propylene diene monomer rubber, chlorinated butyl rubber, nitrile rubber, or silicone rubber; 6. The corrosion-resistant lock nut according to claim 3, characterized in that, A telescopic rod (12) is arranged inside the second spring (9). One end of the telescopic rod (12) is fixedly connected to the straight plate (10), and the other end of the telescopic rod (12) is fixedly connected to the circumferential outer surface of the limiting ring (5).

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