A steel bar rust prevention device and a method of using the same

Abstract

The present invention discloses a steel bar anti-rust device and a method of using the same, comprising a heating tank, a conduit and a vertical steel bar sprayer, wherein the vertical steel bar sprayer comprises a cylindrical spray wall, wherein the inner diameter of the cylindrical spray wall is greater than the outer diameter of the steel bar to be sprayed, and a cavity structure is formed between the inner wall and the outer wall of the cylindrical spray wall; the heating tank is used to melt the thermoplastic anti-rust material, and a gas pressure device for pressing out the melted thermoplastic anti-rust material is provided in the heating tank, wherein the heating tank is connected to one end of the conduit, and the other end of the conduit is connected to the cavity between the inner wall and the outer wall of the cylindrical spray wall; the inner wall of the cylindrical spray wall is evenly provided with a plurality of nozzles, and each of the nozzles is connected to the cavity between the inner wall and the outer wall of the cylindrical spray wall. The present invention can quickly and efficiently realize the anti-rust treatment of steel bars, the removal means are simple, and there is no adverse effect on the performance of the steel bars, and the problem of corrosion of exposed steel bars in bridges can be effectively prevented.

Description

Technical Field

[0001] The invention belongs to the technical field of steel bar rust prevention in highway construction, and particularly relates to a steel bar rust prevention device and a use method thereof. Background Art

[0002] With the vigorous development of infrastructure construction in my country and the extension of highway infrastructure construction to mountainous areas, it is inevitable to build a large number of highway bridges on steep slopes in mountainous areas. In order to ensure the integrity of the bridge structure, it is inevitable to embed steel bars at the joints to facilitate later welding and extension. For example, embedded steel bars for casting guardrails will be reserved on both sides of the bridge panel. It will take several months from the completion of the bridge panel casting to the casting of guardrail concrete. The embedded steel bars at the joints are exposed to the external environment and are easily corroded. After the steel bars are corroded, the functionality of the bridge is reduced and the safety cannot be effectively guaranteed. The existing anti-rust means mainly use artificial application of cement mortar on the surface of steel bars. Although this method can effectively isolate air contact and perform anti-rust treatment, the construction efficiency is low, and after the cement solidifies, it is not easy to separate from the steel bars. When the next step of steel bar welding is carried out, foreign matter still exists on the surface of the steel bars, which brings difficulties to the welding of steel bars and causes deviations in their performance and design. It can be seen that the existing rust removal means cannot effectively solve the problems encountered in the current actual construction.

[0003] In response to the technical problems in the prior art, the present invention provides a steel bar anti-rust device and a method of using the same, which can quickly and efficiently achieve anti-rust treatment of the steel bars, has a simple removal method, and has no adverse effect on the performance of the steel bars, thereby ensuring its effectiveness and effectively preventing the rust problem of exposed steel bars on bridges. Summary of the invention

[0004] In order to solve the above technical problems, the present invention is implemented by the following technical solutions:

[0005] A steel bar anti-rust device comprises a heating tank, a conduit and a vertical steel bar sprayer, wherein the vertical steel bar sprayer comprises a cylindrical spray wall, the inner diameter of the cylindrical spray wall is larger than the outer diameter of the steel bar to be sprayed, and a cavity structure is formed between the inner wall and the outer wall of the cylindrical spray wall; the heating tank is used to melt a thermoplastic anti-rust material, and an air pressure device for pressing out the melted thermoplastic anti-rust material is arranged in the heating tank, the heating tank is connected to one end of the conduit, and the other end of the conduit is connected to the cavity between the inner wall and the outer wall of the cylindrical spray wall; a plurality of nozzles are evenly arranged on the inner wall of the cylindrical spray wall, and each of the nozzles is connected to the cavity between the inner wall and the outer wall of the cylindrical spray wall.

[0006] Furthermore, the vertical steel bar sprayer also includes a wall spray fixing frame, a mounting tube, a transition tube and a traction line. The inner wall and outer wall of the wall spray fixing frame are a cavity structure; one side outer wall of the wall spray fixing frame is connected to one end of the mounting tube, the other end of the mounting tube is connected to one end of the transition tube, and the other end of the transition tube is connected to the other end of the conduit; a knob is provided on the transition tube, one end of the knob extends into the transition tube; the cylindrical spray wall includes three arc plates, each of which is provided with the nozzle on the inner arc surface, and each of the The outer arc surface of the arc plate is connected to the inner wall of the spray wall fixing frame through a connecting tube, and the three arc plates surround the cylindrical spray wall; each of the connecting tubes is slidably connected to the inner wall of the spray wall fixing frame, and each of the connecting tubes is sleeved with a spring; one end of each connecting tube connected to the inner wall of the spray wall fixing frame is connected to one end of the corresponding traction line, and the other end of each traction line passes through the cavity between the inner wall and the outer wall of the spray wall fixing frame, the mounting tube and the transition tube in turn, and is wound around the part of the knob extending into the transition tube.

[0007] Furthermore, the wall spray fixing frame includes a first fixing plate, a second fixing plate and a third fixing plate, the second fixing plate and the third fixing plate are respectively hinged to the first fixing plate, and the second fixing plate and the third fixing plate can be opened to both ends of the first fixing plate respectively; the third fixing plate is connected to one end of the mounting tube, and the second fixing plate and the third fixing plate are respectively connected to the first fixing plate through a bellows.

[0008] Furthermore, the second fixing plate and the third fixing plate are fastened together by snap fastening.

[0009] Furthermore, a blowing frame is connected to the wall spray fixing frame via a connecting column directly below the wall spray fixing frame. The blowing frame can be mounted on the steel bars to be sprayed, and a cavity structure is formed between the inner wall and the outer wall of the blowing frame. A plurality of air nozzles are arranged on the inner wall of the blowing frame, and a fan is installed on the outer wall of the blowing frame.

[0010] Furthermore, the blowing frame includes a first blowing plate and a second blowing plate, the inner walls of the first blowing plate and the second blowing plate are provided with a plurality of air nozzles, and the outer walls of the first blowing plate and the second blowing plate are respectively installed with the fans; the first blowing plate and the second blowing plate are respectively hinged to the connecting column.

[0011] Furthermore, the first blowing plate and the second blowing plate are buckled together by the buckle.

[0012] Furthermore, a handle is provided on the transition pipe.

[0013] Furthermore, the heating tank is provided with a switch for controlling the start and stop of the air pressure device.

[0014] A method for using a steel bar anti-rust device comprises: setting the cylindrical spray wall sleeve on the steel bar to be sprayed, opening the heating tank, and after the thermoplastic anti-rust material melts, controlling the air pressure device to press the thermoplastic anti-rust material out of the heating tank, and the thermoplastic anti-rust material enters the cylindrical spray wall along the conduit and is sprayed out from the nozzle, thereby completing the steel bar spraying.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects: the present invention provides a steel bar anti-rust device. After the bridge deck panel is cast, the steel bars at the connection are exposed and need to be anti-rusted. A thermoplastic anti-rust material, such as a fluorinated thermoplastic foam, is loaded into the heating tank, and the heating tank is turned on. The thermoplastic anti-rust material can melt and flow when heated. After the heating is completed, the foam becomes a fluid plastic body. The cylindrical spray wall is set on the exposed steel bar, and the air pressure device is controlled to press the thermoplastic anti-rust material out of the heating tank. The thermoplastic anti-rust material enters the cylindrical spray wall along the conduit and is sprayed out from the nozzle. The operator controls the cylindrical spray wall to move up and down along the steel bar, and the thermoplastic anti-rust material is evenly sprayed onto the surface of the steel bar to complete the steel bar spraying. The present invention can quickly and efficiently achieve anti-rust treatment of steel bars, and the thermoplastic anti-rust material is easy to remove compared to cement mortar, and the removal means are simple, and there is no adverse effect on the performance of the steel bar, ensuring its effect and effectively preventing the rust problem of exposed steel bars of the bridge.

[0016] Furthermore, the present invention allows the operator to rotate the knob to wrap the traction wire around the knob, and then pull the corresponding connected arc plate through the traction wire, the arc plate moves to the side close to the spray wall fixing frame, the arc plate compresses the spring, and the inner diameter of the cylindrical spray wall surrounded by the arc plate increases; when the knob is released, the spring restores its deformation and pushes the corresponding arc plate in the direction of deformation recovery, and the inner diameter of the cylindrical spray wall surrounded by the arc plate decreases. It can be seen that the present invention can be applied to the rust prevention treatment of steel bars of different diameters, which greatly increases the practicality of the present invention, and steel bars of different positions and different specifications and diameters can be rust-proofed, and its use will not be restricted by the position and size of the steel bars.

[0017] Furthermore, the wall spray fixing frame of the present invention includes a first fixing plate, a second fixing plate and a third fixing plate, the second fixing plate and the third fixing plate are respectively hinged to the first fixing plate, and the second fixing plate and the third fixing plate can be opened to both ends of the first fixing plate respectively. Such a structural design allows the anti-rust device to be directly inserted from the position where the steel bar needs to be anti-rusted, without the need to be inserted from the top of the steel bar downwards, thereby greatly increasing the efficiency of the anti-rust treatment.

[0018] Furthermore, the second fixing plate and the third fixing plate of the present invention are fastened together by snaps, the steel bars are placed in the cylindrical sprayed wall, the position of the arc plate is adjusted according to the diameter of the steel bars, so that the arc plate is in close contact with the steel bars, and after adjustment, the stability can be ensured by snapping together.

[0019] Furthermore, the present invention is connected with a blowing frame through a connecting column directly below the wall spraying fixing frame, and the blowing frame can be sleeved on the steel bar to be sprayed, and there is a cavity structure between the inner wall and the outer wall of the blowing frame; the inner wall of the blowing frame is provided with a plurality of air nozzles, and the outer wall of the blowing frame is installed with a fan. The advantage of this design is that when the anti-rust material is sprayed, the fan is turned on, and a large amount of external air is blown toward the steel bar through the air nozzle, accelerating the cooling of the thermoplastic foam, which can greatly increase its solidification speed and improve the efficiency of the entire process.

[0020] Furthermore, the blowing frame of the present invention comprises a first blowing plate and a second blowing plate, the inner walls of the first blowing plate and the second blowing plate are both provided with a plurality of air nozzles, and the outer walls of the first blowing plate and the second blowing plate are respectively provided with fans; the first blowing plate and the second blowing plate are respectively hinged to the connecting column. Such a structural design allows the anti-rust device to be directly inserted from the position where the steel bar needs to be anti-rusted, without having to be inserted from the top of the steel bar downwards, which greatly increases the efficiency of the anti-rust treatment.

[0021] Furthermore, a handle is provided on the transition pipe to facilitate operation by operators.

[0022] Furthermore, a switch for controlling the start and stop of the air pressure device is provided on the heating tank. The start and stop of the air pressure device can be conveniently controlled by the switch, thereby realizing the control of the entire spraying process.

[0023] A method for using a steel bar anti-rust device comprises the following steps: placing a cylindrical spray wall sleeve on the steel bar to be sprayed, opening a heating tank, and after a thermoplastic anti-rust material is melted, controlling an air pressure device to press the thermoplastic anti-rust material out of the heating tank. The thermoplastic anti-rust material enters the cylindrical spray wall along a conduit and is sprayed out from a nozzle, thereby completing the steel bar spraying. The operation is convenient and the efficiency is high.

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the specific implementation modes of the present invention, the drawings required for use in the description of the specific implementation modes will be briefly introduced below. Obviously, the drawings described below are some implementation modes of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1It is a schematic diagram of the overall structure of the steel bar anti-rust device of the present invention;

[0027] Figure 2 It is a schematic diagram of the three-dimensional structure of the vertical steel bar sprayer of the present invention;

[0028] Figure 3 for Figure 2 A front view of

[0029] Figure 4 for Figure 2 A top view of

[0030] Figure 5 This is a schematic diagram of the internal adjustment connection of the present invention;

[0031] Figure 6 It is a partial enlarged schematic diagram of the wall spray fixing frame;

[0032] Figure 7 It is a schematic diagram of the transverse reinforcement sprayer after being connected in the embodiment;

[0033] Figure 8 Schematic diagram of the structure of the transverse reinforcement sprayer in the embodiment.

[0034] 1-heating tank; 2-duct; 3-vertical steel bar sprayer; 301-cylindrical spray wall; 3011-arc plate; 302-nozzle; 303-spray wall fixing frame; 3031-first fixing plate; 3032-second fixing plate; 3033-third fixing plate; 3034-bellows; 304-connecting pipe; 305-spring; 306-mounting pipe; 307-transition pipe; 308-knob; 309-traction line; 310-buckle; 311-blowing frame; 3111-first blowing plate; 3112-second blowing plate; 312-nozzle; 313-fan; 314-connecting column; 315-handle; 4-switch; 5-horizontal steel bar sprayer. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] As a specific implementation of the present invention, please combine Figures 1 to 6As shown, a steel bar anti-rust device comprises a heating tank 1, a conduit 2 and a vertical steel bar sprayer 3. The heating tank 1 is used to heat and melt the thermoplastic anti-rust material. A gas pressure device for pressing out the melted thermoplastic anti-rust material is installed in the heating tank 1. A switch 4 for controlling the start and stop of the gas pressure device is installed on the heating tank 1. When the switch 4 is pressed, the heating tank 1 is pressurized. Under the action of the internal and external pressure difference, the fluid foam in the heating tank 1 can flow into the vertical steel bar sprayer 3 through the conduit 2. In this embodiment, the thermoplastic anti-rust material is fluorinated thermoplastic foam. The heating tank 1 heats the blocky fluorinated thermoplastic foam into a fluid in a short time and can also play a storage role. The conduit 2 is a heat-insulating conduit with good heat-insulating effect, which can prevent the fluid foam from solidifying.

[0037] The vertical steel bar sprayer 3 includes a cylindrical spray wall 301, the inner diameter of which is larger than the outer diameter of the steel bar to be sprayed, so as to ensure that the cylindrical spray wall 301 can be mounted on the steel bar to be sprayed, and a cavity structure is formed between the inner wall and the outer wall of the cylindrical spray wall 301, so that the fluid foam can flow in the cavity. The heating tank 1 is connected to one end of the conduit 2, and the other end of the conduit 2 is connected to the cavity between the inner wall and the outer wall of the cylindrical spray wall 301. The inner wall of the cylindrical spray wall 301 is evenly provided with a plurality of nozzles 302, and each nozzle 302 is connected to the cavity between the inner wall and the outer wall of the cylindrical spray wall 301. When the switch 4 is pressed, the heating tank 1 is pressurized. Due to the pressure difference between the inside and the outside, the fluid foam in the heating tank 1 flows into the cavity of the cylindrical spray wall 301 through the conduit 2 and is sprayed out from the nozzle 302. The construction personnel control the cylindrical spray wall 301 to move up and down along the steel bars, so as to quickly complete the rust prevention treatment of the steel bars.

[0038] As a preferred embodiment of the present invention, Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, in order to realize the anti-rust spraying of steel bars of various diameters with a vertical steel bar sprayer 3 and expand its practicality, the vertical steel bar sprayer 3 also includes a wall spray fixing frame 303, a connecting pipe 304, a spring 305, a mounting pipe 306, a transition pipe 307, a knob 308 and a traction line 309. The inner wall and the outer wall of the wall spray fixing frame 303 are a cavity structure, so that the fluid foam can flow in the frame of the wall spray fixing frame 303. One side outer wall of the wall spray fixing frame 303 is connected to one end of the mounting pipe 306, the other end of the mounting pipe 306 is connected to one end of the transition pipe 307, the other end of the transition pipe 307 is connected to the other end of the conduit 2, and the fluid foam flows from the conduit 2 into the transition pipe 307, flows from the transition pipe 307 into the mounting pipe 306, and flows from the mounting pipe 306 into the cavity of the wall spray fixing frame 303. As shown Figure 2As shown, a knob 308 is installed on the transition tube 307, and one end of the knob 308 extends into the transition tube 307; for easy operation, a handle 315 is installed on the transition tube 307, which can accurately insert the device into the steel bar and perform rust prevention treatment. Figure 2 and Figure 4 As shown, the cylindrical spray wall 301 includes three arc plates 3011, and a nozzle 302 is arranged on the inner arc surface of each arc plate 3011. The outer arc surface of each arc plate 3011 is connected to the inner wall of the spray wall fixing frame 303 through a connecting pipe 304. The three arc plates 3011 form a cylindrical spray wall 301. The fluid foam in the cavity of the spray wall fixing frame 303 enters the cavity of the corresponding arc plate 3011 through the connecting pipe 304 and is sprayed out from the nozzle 302. Figure 4 and Figure 5 As shown, each connecting tube 304 is slidably connected to the inner wall of the spray wall fixing frame 303, and each connecting tube 304 is sleeved with a spring 305, one end of the spring 305 abuts against the inner wall of the spray wall fixing frame 303, and the other end abuts against the outer arc surface of the corresponding arc plate 3011. Figure 5 As shown, one end of each connecting tube 304 connected to the inner wall of the spray wall fixing frame 303 is connected to one end of the corresponding traction line 309, and the other end of each traction line 309 passes through the cavity between the inner wall and the outer wall of the spray wall fixing frame 303, the mounting tube 306 and the transition tube 307 in sequence, and is then wrapped around the part of the knob 308 extending into the transition tube 307.

[0039] By turning the knob 308, the traction line 309 inside the transition pipe 307 is wound around the knob 308, and the traction line 309 is connected to the three arc plates 3011, so as to control the size of the inner diameter of the cylinder surrounded by the three arc plates 3011, thereby realizing the use of a vertical steel bar sprayer 3 to spray steel bars of various diameters with anti-rust. Through the deformation recovery force of the spring, the vertical steel bars are closely attached to the arc plates 3011, thereby improving the anti-rust effect.

[0040] As another preferred embodiment of the present invention, the wall spray fixing frame 303 can be opened, and the opening degree can be adjusted, so that it can meet the use of steel bars with different diameters, and the device can be directly inserted from the position where the steel bars need to be sprayed. Figure 2As shown, the wall spraying fixing frame 303 includes a first fixing plate 3031, a second fixing plate 3032 and a third fixing plate 3033, the second fixing plate 3032 and the third fixing plate 3033 are respectively hinged with the first fixing plate 3031, the second fixing plate 3032 and the third fixing plate 3033 can be opened to the two ends of the first fixing plate 3031, and the second fixing plate 3032 and the third fixing plate 3033 are buckled by a buckle 310, and the buckle 310 makes the whole device tightly connected, and the position of the steel bar is well fixed and will not loosen. The third fixing plate 3033 is connected to one end of the installation tube 306, and the second fixing plate 3032 and the third fixing plate 3033 are respectively connected to the first fixing plate 3031 through a bellows 3034 to realize the circulation of fluid foam.

[0041] In order to make the foam on the steel bar solidify quickly, in one embodiment of the present invention, a blowing frame 311 is connected to the wall spraying fixing frame 303 through a connecting column 314, and the blowing frame 311 can be set on the steel bar to be sprayed, and the inner wall and outer wall of the blowing frame 311 are a cavity structure; the inner wall of the blowing frame 311 is provided with a plurality of air nozzles 312, and the outer wall of the blowing frame 311 is installed with a fan 313. Preferably, the blowing frame 311 includes a first blowing plate 3111 and a second blowing plate 3112, and the inner walls of the first blowing plate 3111 and the second blowing plate 3112 are both provided with a plurality of air nozzles 312, and the outer walls of the first blowing plate 3111 and the second blowing plate 3112 are respectively installed with fans 313; the first blowing plate 3111 and the second blowing plate 3112 are respectively hinged to the connecting column 314, and the first blowing plate 3111 and the second blowing plate 3112 are buckled by a buckle 310. After the anti-rust material is sprayed, the anti-rust material can be quickly air-dried and solidified.

[0042] As another embodiment of the present invention, although it is mainly aimed at rust-proofing a large number of vertical steel bars exposed to the air, for a small number of transverse steel bars, the vertical steel bar sprayer 3 can also be replaced with a transverse steel bar sprayer 5, such as Figure 7 and Figure 8 As shown, the transverse steel bar sprayer 5 can realize rapid spraying and rust prevention of the transverse steel bars.

[0043] The specific use steps of the present invention are as follows:

[0044] Step 1: After the bridge deck is poured, the exposed steel bars at the joints need to be treated for rust prevention. Figure 2As shown, open the buckle 310, turn the knob 308 at the same time, pull the traction line 309, control the arc plate 3011, make the strong spring 305 in a compressed state, and close the buckle 310; put the cylindrical spray wall 301 surrounded by the arc plate 3011 on the vertical steel bar that needs to be derusted, and also put the blowing frame 311 on the steel bar. After confirming that the steel bar is stable, turn and release the knob 308, the spring 305 recovers its deformation, and the spring 305 is used to push the arc plate 3011 close to the vertical steel bar;

[0045] Step 2: If Figure 1 As shown, the fluorinated thermoplastic foam is placed in a high-temperature heating tank 1. When heated to become a fluid foam, the switch 4 is pressed to press the fluid foam into the transition pipe 307, the mounting pipe 306, the first fixing plate 3031, the bellows 3034, the second fixing plate 3032 and the third fixing plate 3033, the connecting pipe 304 through the insulation conduit 2 in sequence, and finally enters the arc plate 3011 and is evenly sprayed onto the steel bars from the nozzle 302; at the same time, the fan 313 is started to draw air into the anti-rust device and discharge it to the sprayed steel bars through the air nozzle 312, so that the fluid thermoplastic foam is quickly condensed into solid foam, isolating the air, and plays a high-efficiency anti-rust function.

[0046] For rust prevention of transverse reinforcement, such as Figure 7 As shown, it is only necessary to replace the transverse steel bar sprayer 5, aim the nozzle of the transverse steel bar sprayer 5 at the steel bar that needs to be rust-proofed, press the switch 44 to spray the fluid foam evenly onto the steel bar, and the rust-proofing function is significant.

[0047] Finally, it should be noted that the above-described embodiments are only specific implementations of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed by the present invention, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A steel bar anti-rust device, characterized in that: The invention comprises a heating tank (1), a conduit (2) and a vertical steel bar sprayer (3), wherein the vertical steel bar sprayer (3) comprises a cylindrical spray wall (301), the inner diameter of the cylindrical spray wall (301) is larger than the outer diameter of the steel bar to be sprayed, and a cavity structure is formed between the inner wall and the outer wall of the cylindrical spray wall (301); the heating tank (1) is used to melt the thermoplastic anti-rust material, and an air pressure device for pressing out the melted thermoplastic anti-rust material is arranged in the heating tank (1); the heating tank (1) is connected to one end of the conduit (2), and the other end of the conduit (2) is connected to the cavity between the inner wall and the outer wall of the cylindrical spray wall (301); the inner wall of the cylindrical spray wall (301) is evenly provided with a plurality of nozzles (302), and each of the nozzles (302) is connected to the cavity between the inner wall and the outer wall of the cylindrical spray wall (301); The vertical steel bar sprayer (3) also includes a spray wall fixing frame (303), a mounting tube (306), a transition tube (307) and a traction line (309), wherein the inner wall and the outer wall of the spray wall fixing frame (303) are provided with a cavity structure; an outer wall on one side of the spray wall fixing frame (303) is connected to one end of the mounting tube (306), the other end of the mounting tube (306) is connected to one end of the transition tube (307), and the other end of the transition tube (307) is connected to the other end of the guide tube (2); a knob (308) is provided on the transition tube (307), and one end of the knob (308) extends into the transition tube (307); the cylindrical spray wall (301) includes three arc plates (3011), each of which is provided with the nozzle (302) on its inner arc surface, and each of which is provided with a nozzle (302) on its inner arc surface. The outer arc surface of the arc plate (3011) is connected to the inner wall of the spray wall fixing frame (303) through a connecting tube (304), and the three arc plates (3011) surround the cylindrical spray wall (301); each of the connecting tubes (304) is slidably connected to the inner wall of the spray wall fixing frame (303), and each of the connecting tubes (304) is sleeved with a spring (305); one end of each of the connecting tubes (304) connected to the inner wall of the spray wall fixing frame (303) is connected to one end of the corresponding pulling line (309), and the other end of each of the pulling lines (309) passes through the cavity between the inner wall and the outer wall of the spray wall fixing frame (303), the mounting tube (306) and the transition tube (307) in sequence, and is then wound around the portion of the knob (308) extending into the transition tube (307); The heating tank (1) is provided with a switch (4) for controlling the start and stop of the air pressure device.

2. A steel bar anti-rust device according to claim 1, characterized in that: The wall spray fixing frame (303) comprises a first fixing plate (3031), a second fixing plate (3032) and a third fixing plate (3033); the second fixing plate (3032) and the third fixing plate (3033) are respectively hinged to the first fixing plate (3031); the second fixing plate (3032) and the third fixing plate (3033) can be opened to the two ends of the first fixing plate (3031) respectively; the third fixing plate (3033) is connected to one end of the mounting tube (306); the second fixing plate (3032) and the third fixing plate (3033) are respectively connected to the first fixing plate (3031) via a bellows (3034).

3. A steel bar anti-rust device according to claim 2, characterized in that: The second fixing plate (3032) and the third fixing plate (3033) are buckled together via a buckle (310).

4. A steel bar anti-rust device according to claim 3, characterized in that: A blowing frame (311) is connected to the wall spray fixing frame (303) via a connecting column (314). The blowing frame (311) can be sleeved on the steel bars to be sprayed, and a cavity structure is formed between the inner wall and the outer wall of the blowing frame (311). The inner wall of the blowing frame (311) is provided with a plurality of air nozzles (312), and the outer wall of the blowing frame (311) is installed with a fan (313).

5. A steel bar anti-rust device according to claim 4, characterized in that: The blowing frame (311) comprises a first blowing plate (3111) and a second blowing plate (3112); the inner walls of the first blowing plate (3111) and the second blowing plate (3112) are both provided with a plurality of air nozzles (312); the outer walls of the first blowing plate (3111) and the second blowing plate (3112) are respectively provided with the fans (313); the first blowing plate (3111) and the second blowing plate (3112) are respectively hinged to the connecting column (314).

6. A steel bar anti-rust device according to claim 5, characterized in that: The first blowing plate (3111) and the second blowing plate (3112) are buckled together via the buckle (310).

7. A steel bar anti-rust device according to claim 1, characterized in that: The transition pipe (307) is provided with a handle (315).

8. The method for using the steel bar anti-rust device according to any one of claims 1 to 7, characterized in that: The cylindrical spray wall (301) is placed on the steel bar to be sprayed, and the heating tank (1) is turned on. After the thermoplastic anti-rust material is melted, the air pressure device is controlled to press the thermoplastic anti-rust material out of the heating tank (1). The thermoplastic anti-rust material enters the cylindrical spray wall (301) along the conduit (2) and is sprayed out from the nozzle (302), thereby completing the steel bar spraying.

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