Reinforcing steel bar connection lock bolt sleeve and manufacturing method thereof

Abstract

The invention discloses a reinforcing steel bar connection lock bolt sleeve and a manufacturing method thereof.The reinforcing steel bar connection lock bolt sleeve comprises a sleeve shell, the outer surface of the sleeve shell is fixedly connected with a fixing seat, the inner surface of the fixing seat is rotatably connected with a bidirectional screw, and the outer surface of the bidirectional screw is in threaded connection with a limiting plate; a sliding groove is formed in the outer surface of the sleeve shell, a sliding block is slidably connected to the inner surface of the sliding groove, a connecting base is fixedly connected to the inner surface of the sliding block, and the wedge-shaped clamping mechanism comprises an upper wedge-shaped base, a lower wedge-shaped base, an upper connecting block, a lower connecting block, a connecting rod, an anti-falling buckle and an anti-skid rubber pad. According to the reinforcing steel bar connecting anti-loosening bolt sleeve and the manufacturing method thereof, design is reasonable, reinforcing steel bars are convenient to install and can be prevented from falling off by arranging the clamping anti-loosening mechanism, the outer surface of the reinforcing steel bar connecting anti-loosening bolt sleeve is coated with the anti-corrosion coating, corrosion resistance is improved, the connecting firmness degree of the reinforcing steel bars is improved, and the service life of the reinforcing steel bars is prolonged. And potential safety hazards are reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of steel bar connection sleeves, and in particular relates to a steel bar connection anti-loosening bolt sleeve and a manufacturing method thereof. Background Art

[0002] When high-strength steel bars are used, they often need to be connected, which requires the use of high-strength steel bar connection equipment. High-strength steel bar connection equipment basically has the advantages of light weight, strong structure, and long service life, which can meet the use requirements of high-strength steel bar connection work. The bolt sleeve for steel bar connection is an efficient and reliable steel bar connection method. It ensures the stability and reliability of steel bar connection by mechanical means and is widely used in modern construction.

[0003] Most of the steel bar connection devices in the prior art are connected only by threads. This connection method often causes the steel bars on both sides of the sleeve to have inconsistent connection lengths when threaded, resulting in uneven force on the threads on both sides when subjected to tension. The shorter side of the threaded connection is prone to loosening and causing the steel bar to detach, reducing the firmness of the connection, affecting the quality of construction and causing safety hazards.

[0004] In order to solve this problem, the present invention provides a structure of a steel bar connection anti-loosening bolt sleeve and a manufacturing method thereof. First, by setting a clamping and anti-loosening mechanism, the steel bars can be easily installed and prevented from falling off. Second, an anti-corrosion coating is coated on the outer surface of the steel bar connection anti-loosening bolt sleeve to improve corrosion resistance, avoid failure of the steel bar connection due to corrosion, improve the connection firmness of the steel bars, improve construction quality, and reduce safety hazards. Summary of the invention

[0005] Purpose of the invention: In order to overcome the above shortcomings, the purpose of the present invention is to provide a steel bar connection anti-loosening bolt sleeve and a manufacturing method thereof. The design is reasonable. By setting a clamping and anti-loosening mechanism, it not only makes it easy to install the steel bars, but also prevents the steel bars from falling off. By coating the outer surface of the steel bar connection anti-loosening bolt sleeve with an anti-corrosion coating, the corrosion resistance is improved, the connection firmness of the steel bars is improved, the safety hazards are reduced, and the application prospects are broad.

[0006] The objective of the present invention is achieved through the following technical solutions: Technical solution: A steel bar connection anti-loosening bolt sleeve, the steel bar connection anti-loosening bolt sleeve comprising: Sleeve housing; A fixing seat, the outer surface of the sleeve shell is fixedly connected with the fixing seat; A bidirectional screw, the inner surface of the fixing seat is rotatably connected with the bidirectional screw; a limit plate, the outer surface of the bidirectional screw is threadedly connected with the limit plate; A slider, wherein a slide groove is provided on the outer surface of the sleeve shell, and the inner surface of the slide groove is slidably connected with the slider; A connecting seat, the inner surface of the slider is fixedly connected with the connecting seat, and the inner surface of the connecting seat is provided with a threaded hole; A clamping and anti-loosening mechanism, the clamping and anti-loosening mechanism comprises an upper wedge-shaped seat, a lower wedge-shaped seat, an upper connecting block, a lower connecting block, a connecting rod, an anti-drop buckle, and an anti-slip rubber pad; the outer surface of the upper wedge-shaped seat is fixedly connected to the upper connecting block, the lower surface of the upper connecting block is fixedly connected to the connecting rod, the outer surface of the connecting rod is slidably connected to the lower connecting block, one end of the connecting rod away from the upper connecting block is fixedly connected to the anti-drop buckle, the outer surface of the lower connecting block is fixedly connected to the lower wedge-shaped seat, and the inner surface of the upper wedge-shaped seat is fixedly connected with an anti-slip rubber pad; The outer surface of the steel bar connection anti-loosening bolt sleeve is coated with anti-corrosion paint.

[0007] The steel bar connection anti-loosening bolt sleeve of the present invention is provided with a clamping and anti-loosening mechanism, which not only facilitates the installation of the steel bar, but also prevents the steel bar from falling off. When the steel bar is subjected to axial tension, the clamping and anti-loosening mechanism will be driven to contract, so that the clamping force is increased, thereby preventing the steel bar from loosening, improving the connection firmness of the steel bar, improving the construction quality and reducing safety hazards.

[0008] Corrosion will weaken the strength of the steel bar connection bolt sleeve. When the strength of the steel bar connection bolt sleeve is reduced to a certain extent, it will not be able to withstand the stress of the steel bar connection part and may break. This will cause the steel bar connection to fail, thereby affecting the integrity and stability of the building structure. By applying an anti-corrosion coating on the outer surface of the steel bar connection anti-loosening bolt sleeve, the corrosion resistance of the steel bar connection bolt sleeve can be improved, and the connection firmness of the steel bar can be improved.

[0009] Furthermore, in the above-mentioned steel bar connection anti-loosening bolt sleeve, the inner surface of the anti-slip rubber pad is slidably connected to the steel bar body, the outer surface of the steel bar body is provided with a straight thread, and the straight thread is threadedly connected to the threaded hole of the connecting seat, and the inner surface of the lower wedge-shaped seat is fixedly connected to the anti-slip rubber pad.

[0010] The anti-skid rubber pad arranged inside the wedge seat can increase the friction between the steel bar body and the wedge seat, so that the steel bar is not easy to loosen when the wedge seat is clamped.

[0011] Furthermore, in the above-mentioned steel bar connection anti-loosening bolt sleeve, the number of the bidirectional screws is 4 and they are in a rectangular array; the inner surface of the limit plate is slidably connected to the sleeve outer shell, the number of the limit plates is 2 and they are distributed on the left and right; the outer surface of the connecting seat is slidably connected to the sleeve outer shell, the number of the connecting seats is 2 and they are distributed on the left and right.

[0012] The four bidirectional screws in a rectangular array are conducive to driving the two limit plates distributed on the left and right to move and fix the position of the slider to prevent the connection seat from moving. The two connection seats distributed on the left and right are conducive to the movement of the connection seat, thereby driving the movement of the wedge seat to achieve the clamping and loosening of the steel bar body.

[0013] Furthermore, in the above-mentioned steel bar connection anti-loosening bolt sleeve, the outer surface of the upper wedge seat is slidably connected to the sleeve shell, and the outer surface of the lower wedge seat is slidably connected to the sleeve shell; the outer surface of the connecting seat is slidably connected to the upper wedge seat, and the outer surface of the connecting seat is slidably connected to the lower wedge seat; the outer surface of the limit plate is slidably connected to the slider, and the outer surface of the connecting seat is slidably connected to the anti-slip rubber pad.

[0014] Furthermore, the above-mentioned steel bar connection anti-loosening bolt sleeve is made of high-strength alloy steel.

[0015] In steel bar connections, bolt sleeves made of high-strength alloy steel can ensure the stability of the steel bar connection, and because of its light weight, it is easy for construction workers to operate and install.

[0016] Preferably, the material of the steel bar connection anti-loosening bolt sleeve is 42CrMo.

[0017] Furthermore, in the above-mentioned steel bar connection anti-loosening bolt sleeve, the anti-corrosion coating comprises the following raw materials in parts by weight: Liquid A: 20-40 parts of zinc powder, 5-10 parts of aluminum powder, 20-40 parts of polyethylene glycol-400, and 20-40 parts of silane coupling agent; Liquid B: 10-30 parts of deionized water, 10-30 parts of ethanol, 1-5 parts of emulsifier NP-10, 0.5-2 parts of silicon dioxide, 0.5-2 parts of sodium molybdate, 0.5-2 parts of carboxymethyl cellulose, 0.5-2 parts of hydroxyethyl cellulose, 0.5-2 parts of succinic acid The present invention also relates to a method for manufacturing the steel bar connection anti-loosening bolt sleeve, comprising the following steps: S1: heat treatment of the bar; S2: The heat-treated rods are cut and threaded, and then assembled to obtain steel bar connection anti-loosening bolt sleeves; S3: Anti-corrosion paint is applied on the outer surface of the steel bar connection anti-loosening bolt sleeve.

[0018] Furthermore, in the manufacturing method of the above-mentioned steel bar connection anti-loosening bolt sleeve, the heat treatment of S2 is carried out in a medium frequency induction furnace, specifically including the following contents: first quenching, the quenching temperature is 800-900°C, the time is 1-10min, and then high temperature tempering, the high temperature tempering temperature is 600-700°C, and the time is 2-4h.

[0019] Before processing, the rods are heat treated in a medium frequency induction furnace to give them higher strength and toughness.

[0020] Further, the manufacturing method of the above-mentioned steel bar connection anti-loosening bolt sleeve, the said S3, specifically comprises the following contents: adding a silane coupling agent to a stirrer, adding zinc powder while stirring, adding aluminum powder after stirring evenly, continuing to stir for 30-60 minutes, adding polyethylene glycol-400, continuing to stir for 2-3 hours, and obtaining liquid A; adding deionized water and ethanol to a stirrer, adding silicon dioxide and sodium molybdate after stirring evenly, adding emulsifier NP-10 while stirring, continuing to stir for 30-60 minutes, adding carboxymethyl cellulose, hydroxyethyl fiber, succinic acid, adjusting the pH to 7-8, continuing to stir for 6-8 hours, and obtaining liquid B; adding liquid B to liquid A, continuing to stir for 2-3 hours, and obtaining an anti-corrosion coating; firstly dip-coating and then brush-coating the steel bar connection anti-loosening bolt sleeve with the obtained anti-corrosion coating, and then drying and curing, the drying temperature is 100-110°C, the time is 10-15 minutes, and the curing temperature is 200-220°C, and the time is 40-50 min.

[0021] The anti-corrosion coating is evenly applied to the entire sleeve of the steel bar connection anti-loosening bolt by first dipping and then brushing. After drying and curing, the anti-corrosion coating forms a uniform anti-corrosion coating on the surface of the steel bar connection anti-loosening bolt sleeve.

[0022] Compared with the prior art, the present invention has the following beneficial effects: (1) The steel bar connection anti-loosening bolt sleeve of the present invention, by providing a clamping and anti-loosening mechanism, not only facilitates the installation of the steel bar, but also prevents the steel bar from falling off. When the steel bar is subjected to axial tension, the clamping and anti-loosening mechanism will be driven to contract, so that the clamping force is increased, thereby preventing the steel bar from loosening, improving the firmness of the steel bar connection, improving the construction quality and reducing safety hazards; (2) The steel bar connection anti-loosening bolt sleeve of the present invention is coated with an anti-corrosion coating on the outer surface of the steel bar connection anti-loosening bolt sleeve. The anti-corrosion coating can play a shielding protection role, an electrochemical protection role, and a bimetallic protection role, thereby avoiding the problem of failure of the steel bar connection caused by corrosion, thereby affecting the integrity and stability of the building structure; (3) The manufacturing method of the steel bar connection anti-loosening bolt sleeve described in the present invention is reasonably designed. Before the rod is cut and threaded, the rod is first heat treated in a medium frequency induction furnace, which can make the rod have higher strength and toughness. The surface of the steel bar connection anti-loosening bolt sleeve is uniformly coated by dipping, brushing, drying and curing. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1This is a schematic diagram of the overall structure of a steel bar connection anti-loosening bolt sleeve according to the present invention; Figure 2 A cross-sectional view of a steel bar connection anti-loosening bolt sleeve according to the present invention; Figure 3 This is a schematic diagram of the internal structure of a steel bar connection anti-loosening bolt sleeve according to the present invention; Figure 4 It is a partial explosion schematic diagram of a steel bar connection anti-loosening bolt sleeve according to the present invention; In the figure: sleeve housing 1, slide groove 11, fixed seat 2, bidirectional screw 3, limit plate 4, slider 5, connecting seat 6, threaded hole 61, clamping and anti-loosening mechanism 7, upper wedge seat 71, lower wedge seat 72, upper connecting block 73, lower connecting block 74, connecting rod 75, anti-drop buckle 76, anti-slip rubber pad 77, steel bar body a. DETAILED DESCRIPTION

[0024] The following will be combined with specific embodiments and appendix Figure 1 , 2 , 3, and 4 provide a clear and complete description of the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present invention. The following embodiment 1 provides a structure of a steel bar connection anti-loosening bolt sleeve.

[0025] Example 1 like Figure 1 , 2 As shown in , 3 and 4, the steel bar connection anti-loosening bolt sleeve of Example 1 includes: a sleeve shell 1, a fixing seat 2 is fixedly connected to the outer surface of the sleeve shell 1, a bidirectional screw 3 is rotatably connected to the inner surface of the fixing seat 2, the number of the bidirectional screws 3 is 4 and they are in a rectangular array, the outer surface of the bidirectional screw 3 is threadedly connected to a limiting plate 4, the inner surface of the limiting plate 4 is slidably connected to the sleeve shell 1, the number of the limiting plates 4 is 2 and they are distributed left and right, the outer surface of the sleeve shell 1 is provided with a slide groove 11, the inner surface of the slide groove 11 is slidably connected to a slider 5, the outer surface of the limiting plate 4 is slidably connected to the slider 5, the inner surface of the slider 5 is fixedly connected to a connecting seat 6, the outer surface of the connecting seat 6 is slidably connected to the sleeve shell 1, the number of the connecting seats 6 is 2 and they are distributed left and right, and the inner surface of the connecting seat 6 is provided with a threaded hole 61.

[0026] Furthermore, the steel bar connection anti-loosening bolt sleeve of Example 1 also includes a clamping anti-loosening mechanism 7, which includes an upper wedge-shaped seat 71, a lower wedge-shaped seat 72, an upper connecting block 73, a lower connecting block 74, a connecting rod 75, an anti-drop buckle 76, and an anti-slip rubber pad 77. The outer surface of the upper wedge-shaped seat 71 is fixedly connected to the upper connecting block 73, the outer surface of the upper wedge-shaped seat 71 is slidably connected to the sleeve housing 1, the outer surface of the connecting seat 6 is slidably connected to the upper wedge-shaped seat 71, the lower surface of the upper connecting block 73 is fixedly connected to the connecting rod 75, the outer surface of the connecting rod 75 is slidably connected to the lower connecting block 74, and the connecting rod 75 is away from the upper connecting block One end of 74 is fixedly connected to the anti-drop buckle 76, the outer surface of the lower connecting block 74 is fixedly connected to the lower wedge seat 72, the outer surface of the lower wedge seat 72 is slidably connected to the sleeve housing 1, the outer surface of the connecting seat 6 is slidably connected to the lower wedge seat 72, the inner surface of the upper wedge seat 71 is fixedly connected with an anti-slip rubber pad 77, the outer surface of the connecting seat 6 is slidably connected to the anti-slip rubber pad 77, the inner surface of the lower wedge seat 72 is fixedly connected to the anti-slip rubber pad 77, the inner surface of the anti-slip rubber pad 77 is slidably connected to the steel bar body a, the outer surface of the steel bar body a is provided with a straight thread, and the outer surface of the straight thread is threadedly connected to the threaded hole 61 of the connecting seat 6.

[0027] Furthermore, the outer surface of the steel bar connection anti-loosening bolt sleeve of Example 1 is coated with an anti-corrosion coating.

[0028] The working principle of the steel bar connection anti-loosening bolt sleeve of Example 1 is as follows: When the locking cam 73 is engaged, the locking cam 738 is engaged with the locking cam 74 so that the locking cam 738 is engaged with the locking cam 74. When the locking cam 738 is engaged, the locking cam 738 is engaged with the locking cam 74 and the locking cam 74 is engaged with the locking cam 74.

[0029] The following embodiment 2 provides a method for manufacturing a steel bar connection anti-loosening bolt sleeve.

[0030] Example 2 Manufacturing method of the steel bar connection anti-loosening bolt sleeve of embodiment 2: S1: heat treating the rod, the material of the rod is 42CrMo; Specifically, the heat treatment is carried out in a medium frequency induction furnace, which specifically includes the following contents: first quenching, the quenching temperature is 830°C, the time is 4 minutes, and then high temperature tempering, the high temperature tempering temperature is 680°C, and the time is 3 hours.

[0031] The heat-treated bars have excellent mechanical properties, with a hardness of usually 39HRC, a tensile strength greater than 1030MPa, an elongation greater than 8%, and a cross-sectional shrinkage greater than 50%. The impact energy absorbed is greater than 29J.

[0032] S2: The heat-treated rods are cut and threaded, and then assembled to obtain steel bar connection anti-loosening bolt sleeves.

[0033] S3: Anti-corrosion coating is applied on the outer surface of the steel bar connection anti-loosening bolt sleeve; Specifically, the anti-corrosion coating comprises the following raw materials in parts by weight: Liquid A: 30 parts of zinc powder, 8 parts of aluminum powder, 30 parts of polyethylene glycol-400, 25 parts of silane coupling agent KH792; Liquid B: 25 parts of deionized water, 25 parts of ethanol, 3.5 parts of emulsifier NP-10, 1.5 parts of silicon dioxide, 1.6 parts of sodium molybdate, 0.5 parts of carboxymethyl cellulose, 0.5 parts of hydroxyethyl cellulose, and 0.6 parts of succinic acid.

[0034] Add silane coupling agent to the blender, add zinc powder while stirring, add aluminum powder after stirring evenly, continue stirring for 45 minutes, add polyethylene glycol-400, continue stirring for 3 hours to obtain liquid A; add deionized water and ethanol to the blender, stir evenly, add silicon dioxide and sodium molybdate, add emulsifier NP-10 while stirring, continue stirring for 60 minutes, add carboxymethyl cellulose, hydroxyethyl cellulose, succinic acid, adjust the pH to about 7, continue stirring for 7 hours to obtain liquid B; add liquid B to liquid A, continue stirring for 3 hours to obtain an anti-corrosion coating.

[0035] The obtained anti-corrosion coating is first dipped and then brushed on the steel bar connection anti-loosening bolt sleeve, and then dried and cured. The drying temperature is 105°C for 15 min, and the curing temperature is 210°C for 45 min.

[0036] After the outer surface of the steel bar connection anti-loosening bolt sleeve is coated with anti-corrosion coating, the average thickness of the anti-corrosion coating is 10μm, the adhesion is 4-5 levels, the hardness is 9H, the surface is smooth and uniform, without bubbles, cracks, etc., and the surface presents a silvery white metallic luster. After 720h of neutral salt spray test, no red sleeves are generated on the outer surface of the steel bar connection anti-loosening bolt sleeve, proving that the anti-corrosion effect of the steel bar connection anti-loosening bolt sleeve is good.

[0037] There are many specific methods and approaches of the present invention, and the above is only a preferred embodiment of the present invention. It should be pointed out that the above embodiments are only used to illustrate the present invention, and are not used to limit the scope of protection of the present invention. For those of ordinary skill in the art, without departing from the principle of the present invention, several improvements can also be made, and these improvements should also be regarded as the scope of protection of the present invention.

Claims

1. A steel bar connection anti-loosening bolt sleeve, characterized in that: The steel bar connection anti-loosening bolt sleeve comprises: Sleeve housing (1); A fixing seat (2), the outer surface of the sleeve housing (1) being fixedly connected to the fixing seat (2); A bidirectional screw (3), the inner surface of the fixing seat (2) being rotatably connected to the bidirectional screw (3); a limit plate (4), the outer surface of the bidirectional screw (3) being threadedly connected to the limit plate (4); A sliding block (5), wherein a sliding groove (11) is provided on the outer surface of the sleeve housing (1), and the sliding block (5) is slidably connected to the inner surface of the sliding groove (11); A connecting seat (6), the inner surface of the sliding block (5) being fixedly connected to the connecting seat (6), the inner surface of the connecting seat (6) being provided with a threaded hole (61); A clamping and anti-loosening mechanism (7), the clamping and anti-loosening mechanism (7) comprising an upper wedge-shaped seat (71), a lower wedge-shaped seat (72), an upper connecting block (73), a lower connecting block (74), a connecting rod (75), an anti-drop buckle (76), and an anti-slip rubber pad (77); the outer surface of the upper wedge-shaped seat (71) is fixedly connected to the upper connecting block (73), the lower surface of the upper connecting block (73) is fixedly connected to the connecting rod (75), the outer surface of the connecting rod (75) is slidably connected to the lower connecting block (74), one end of the connecting rod (75) away from the upper connecting block (73) is fixedly connected to the anti-drop buckle (76), the outer surface of the lower connecting block (74) is fixedly connected to the lower wedge-shaped seat (72), and the inner surface of the upper wedge-shaped seat (71) is fixedly connected with the anti-slip rubber pad (77); The outer surface of the steel bar connection anti-loosening bolt sleeve is coated with anti-corrosion paint.

2. The steel bar connection anti-loosening bolt sleeve according to claim 1, characterized in that: The inner surface of the anti-skid rubber pad (77) is slidably connected to a steel bar body, the outer surface of the steel bar body is provided with a straight thread, and the straight thread is threadedly connected to the threaded hole (61) of the connecting seat (6), and the inner surface of the lower wedge-shaped seat (72) is fixedly connected to the anti-skid rubber pad (77).

3. The steel bar connection anti-loosening bolt sleeve according to claim 1, characterized in that: The number of the bidirectional screws (3) is four and they are arranged in a rectangular array; the inner surface of the limit plate (4) is slidably connected to the sleeve outer shell (1), the number of the limit plates (4) is two and they are distributed on the left and right; the outer surface of the connecting seat (6) is slidably connected to the sleeve outer shell (1), the number of the connecting seats (7) is two and they are distributed on the left and right.

4. The steel bar connection anti-loosening bolt sleeve according to claim 1, characterized in that: The outer surface of the upper wedge-shaped seat (71) is slidably connected to the sleeve housing (1), and the outer surface of the lower wedge-shaped seat (72) is slidably connected to the sleeve housing (1); the outer surface of the connecting seat (6) is slidably connected to the upper wedge-shaped seat (71), and the outer surface of the connecting seat (6) is slidably connected to the lower wedge-shaped seat (72); the outer surface of the limit plate (4) is slidably connected to the slider (5), and the outer surface of the connecting seat (6) is slidably connected to the anti-slip rubber pad (77).

5. The steel bar connection anti-loosening bolt sleeve according to claim 1, characterized in that: The material of the steel bar connection anti-loosening bolt sleeve is high-strength alloy steel.

6. The steel bar connection anti-loosening bolt sleeve according to claim 1, characterized in that: The anti-corrosion coating comprises the following raw materials in parts by weight: Liquid A: 20-40 parts of zinc powder, 5-10 parts of aluminum powder, 20-40 parts of polyethylene glycol-400, and 20-40 parts of silane coupling agent; Liquid B: 10-30 parts of deionized water, 10-30 parts of ethanol, 1-5 parts of emulsifier NP-10, 0.5-2 parts of silicon dioxide, 0.5-2 parts of sodium molybdate, 0.5-2 parts of carboxymethyl cellulose, 0.5-2 parts of hydroxyethyl cellulose, and 0.5-2 parts of succinic acid.

7. The method for manufacturing a steel bar connection anti-loosening bolt sleeve according to any one of claims 1 to 6, characterized in that: The steps include: S1: heat treatment of the bar; S2: The heat-treated rods are cut and threaded, and then assembled to obtain steel bar connection anti-loosening bolt sleeves; S3: Anti-corrosion paint is applied on the outer surface of the steel bar connection anti-loosening bolt sleeve.

8. The method for manufacturing the steel bar connection anti-loosening bolt sleeve according to claim 7, characterized in that: The heat treatment of S2 is carried out in a medium frequency induction furnace, specifically including the following contents: first quenching at a quenching temperature of 800-900°C for 1-10 min, and then high temperature tempering at a high temperature of 600-700°C for 2-4 h.

9. The method for manufacturing the steel bar connection anti-loosening bolt sleeve according to claim 7, characterized in that: The S3 specifically includes the following contents: adding silane coupling agent to a stirrer, adding zinc powder while stirring, adding aluminum powder after stirring evenly, continuing stirring for 30-60 minutes, adding polyethylene glycol-400, and continuing stirring for 2-3 hours to obtain liquid A; adding deionized water and ethanol to a stirrer, stirring evenly, adding silicon dioxide and sodium molybdate, adding emulsifier NP-10 while stirring, continuing stirring for 30-60 minutes, adding carboxymethyl cellulose, hydroxyethyl fiber, succinic acid, adjusting the pH to 7-8, continuing stirring for 6-8 hours, and obtaining liquid B; adding liquid B to liquid A, continuing stirring for 2-3 hours, and obtaining an anti-corrosion coating; firstly dip-coating and then brush-coating the obtained anti-corrosion coating on the sleeve of the steel bar connection anti-loosening bolt, and then drying and curing, the drying time is 20 minutes, the drying temperature is 100-110°C, the time is 10-15 minutes, and the curing temperature is 200-220°C, and the time is 40-50 minutes.

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