High-pressure sand blasting and passivation integrated steel pretreatment device

Abstract

The invention belongs to the technical field of metal material surface treatment, and provides a high-pressure sand blasting and passivating integrated steel pretreatment device which comprises a treatment box, separation plates are arranged on opposite side walls in the treatment box, the opposite faces of the two separation plates are movably attached, and the treatment box is divided into a first treatment cavity and a second treatment cavity through the two separation plates; a bearing box for storing a passivating agent is arranged at the bottom of the treatment chamber II; a placing hole is formed in a top plate of the treatment box; steel enters the treatment box through the placing hole; hoisting assemblies are arranged on the top of the treatment box and located on the two sides of the placing hole; the hoisting assembly is connected with the locking and clamping assembly; according to the device, sand blasting and steel are integrally designed, so that secondary transfer is avoided, the treatment time is shortened, and meanwhile, the situation that the steel is subjected to secondary pollution is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of metal material surface treatment, and particularly relates to a high-pressure sandblasting and passivation integrated steel pretreatment device. Background Art

[0002] The marine environment has a significant accelerating effect on the corrosion and damage of metal materials. Especially for steel in complex working conditions such as marine atmosphere, splash zone, and seawater immersion, when it is exposed to harsh conditions such as high humidity, high salt mist, and chloride ion erosion for a long time, it is extremely easy to cause problems such as pitting corrosion, crevice corrosion, and stress corrosion cracking, resulting in the failure of engineering structures and safety risks.

[0003] To improve the service life of marine engineering equipment and facilities, the steel surface pretreatment technology has become a key link. At present, the conventional pretreatment processes for marine engineering steel mainly include: sandblasting. The purpose of sandblasting is to remove oxides, rust, old paint layers, and other impurities on the steel surface, ensure the cleanliness of the steel surface, form a certain surface roughness through the injection of particles. Sandblasting can effectively enhance the adhesion of coatings or bonding materials, prevent coating peeling, extend the service life of coatings, and sandblasting can also enhance the corrosion resistance of steel by generating a tiny surface rough structure.

[0004] Passivation treatment: A thin and dense oxide film (passivation film) is formed on the steel surface through a chemical reaction. This film has extremely high chemical stability and corrosion resistance, and can effectively prevent oxygen, moisture, and other corrosive substances in the external environment from contacting the steel substrate, prevent the penetration of corrosive media, thereby significantly reducing the risks of pitting corrosion, uniform corrosion, and crevice corrosion.

[0005] Moreover, the existing sandblasting and passivation processes are carried out step by step, and multiple clamping and transfer operations are required. This not only prolongs the production cycle, but also the intermediate exposure links are prone to cause secondary oxidation or pollution of the steel, affecting the treatment effect. Summary of the Invention

[0006] In order to solve the above technical problems, the present invention provides a high-pressure sandblasting and passivation integrated steel pretreatment device to solve the problems such as secondary oxidation or pollution of steel caused by multiple clamping during the separate sandblasting and passivation processes in the prior art.

[0007] A high-pressure sandblasting and passivation integrated steel pretreatment device includes a treatment tank. On the opposite side walls inside the treatment tank, there are isolation plates. The opposite surfaces of the two isolation plates are movably attached. The two isolation plates divide the treatment tank into treatment chamber one and treatment chamber two.

[0008] It also includes a sandblasting component, which is located inside the first processing chamber. A carrier box for storing the passivator is provided at the bottom of the second processing chamber. A placement hole is provided on the top plate of the processing box, and the steel enters the inside of the processing box through the placement hole. Hoisting components are provided on both sides of the placement hole at the top of the processing box. Locking and clamping components are provided at both ends of the steel, and the hoisting components are connected to the locking and clamping components.

[0009] Preferably, rotating shafts are provided at the ends of the two partition plates away from each other. The rotating shafts are movably arranged inside the side plates of the processing box. A motor I connected to an external power supply is provided on the outer side wall of the processing box body, and the output shaft of the motor I is connected to the rotating shaft.

[0010] Preferably, rubber pads are provided on the opposite surfaces of the two partition plates. When the two rubber pads are in contact with each other, the two partition plates are inclined relative to each other and inclined downward toward the direction close to the rotating shaft. Positioned opposite discharge holes are provided on the front and rear side plates of the partition plate. The discharge holes are located above the rotating shaft. A sealing plate I for sealing the discharge holes is provided inside the discharge holes. Handles are symmetrically provided on the outer wall of the sealing plate I. A sealing plate II for sealing the placement hole is provided on the placement hole, and handles identical to those are installed on the top of the sealing plate II.

[0011] Preferably, the hoisting component includes a cable reel, a lifting rope, a lifting ring, and a mounting plate. The cable reels are symmetrically arranged above the top plate of the processing box. A shaft body is provided inside the cable reel. The mounting plate is fixedly installed on the top plate of the processing box and is rotatably connected to both ends of the cable reel. The lifting rope is wound around the cable reel. The lifting ring is fixedly connected to the other end of the lifting rope and enters the inside of the processing box through the placement hole. Motors II connected to an external power supply are provided on the two mounting plates on both sides. The output shafts of the motors II pass through the mounting plates and are connected to the shaft bodies inside the cable reels.

[0012] Preferably, the locking and clamping component includes clamping blocks, fixed blocks, threaded rods, and locking nuts. The number of clamping blocks at one end of the steel is two, and the vertical cross-sectional profile of the clamping blocks is "V"-shaped. The "V"-shaped openings of the two clamping blocks face each other. Anti-slip pads are provided on the opposite surfaces of the two clamping blocks. The anti-slip pads are in contact with the steel. The fixed blocks are fixedly installed at the top and bottom of the clamping blocks.

[0013] Preferably, the threaded rods are horizontally symmetrically arranged above and below the clamping blocks, and the threaded rods pass through the two fixed blocks at the same horizontal height. A limiting ring is provided on the threaded rod between the two fixed blocks. The lifting ring is stuck on the threaded rod between the two limiting rings. The locking nuts are symmetrically installed on the threaded rods. After the clamping blocks complete clamping of the steel, the locking nuts are in close contact with the fixed blocks.

[0014] Preferably, plastic buckles are symmetrically arranged on the outer side wall of the clamping block. One end of the plastic buckle away from the clamping block is open. Transparent observation windows are arranged on the left and right side plates of the treatment box. A push rod is movably connected to the transparent observation window. A positioning rod is arranged at one end of the push rod extending into the treatment box. The vertical cross-sectional profile of the positioning rod is "X"-shaped, and the positioning rod cooperates with the plastic buckle.

[0015] Preferably, the sandblasting assembly includes an arc plate, sandblasting nozzles, a sand delivery pipe and a sand storage tank. Horizontal bearing plates are arranged on the front and rear side walls of the treatment box. The sand storage tank is installed on the bearing plate. The arc plate is arranged on the left and right sides of the steel. The sandblasting nozzles are distributed at intervals on the arc plate and are circumferentially distributed around the center of the arc plate. One end of the sand delivery pipe is connected to the sandblasting nozzle, and the other end is connected to the sand storage tank.

[0016] Preferably, control cylinders are arranged on the bearing plate on both sides of the sand storage tank. An adjusting plate is arranged at the end of the air rod of the control cylinder. The adjusting plate movably penetrates into the treatment box, and the other end of the adjusting plate is fixedly connected to the arc plate. A conveying pipe with a valve is arranged on one side of the bearing box. The other end of the conveying pipe extends out of the treatment box.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. Through the arranged treatment box of the present invention, two movably fitted isolation plates are installed inside the treatment box. The isolation plates divide it into an upper treatment chamber one and treatment chamber two. The steel is fixed by the locking and clamping assembly. It enters treatment chamber one through the placement hole by the hoisting assembly. A sandblasting assembly is installed in treatment chamber one. The steel can be sandblasted through the sandblasting assembly. The sand material will accumulate on the two isolation plates. After sandblasting is completed, the sand material is discharged by opening the discharge hole. Then the steel is lowered so that it can enter treatment chamber two. A passivator is placed in the bearing box. Thus, passivation of the steel can be realized, and the integrated treatment of sandblasting and passivation of the steel is achieved. It can be realized in one device, and at the same time, sandblasting and passivation will not interfere with each other. Compared with the traditional sequential method, multiple transfers are avoided, and the treatment effect of the steel is improved. Description of the Drawings

[0019] Figure 1 It is a schematic diagram of the component structure of the overall steel pretreatment device of the present invention;

[0020] Figure 2 It is a schematic diagram of the internal component structure of the treatment box of the present invention;

[0021] Figure 3Cross-sectional view of the internal structure of the processing side of the present invention;

[0022] Figure 4 Schematic diagram of the component structure of the hoisting assembly of the present invention;

[0023] Figure 5 Schematic diagram of the structure of the locking and clamping component of the present invention;

[0024] Figure 6 Schematic diagram of the structures of components such as the clamping block and the positioning rod of the present invention;

[0025] Figure 7 Schematic diagram of the component structure of the sandblasting assembly of the present invention.

[0026] In the figure:

[0027] 1. Processing box; 2. Partition board; 3. First processing chamber; 4. Second processing chamber; 5. Bearing box; 6. Placing hole; 7. Rotating shaft; 8. First motor; 9. Rubber pad; 10. Discharge hole; 11. First sealing plate; 12. Handle; 13. Second sealing plate; 14. Cable reel; 15. Suspension rope; 16. Suspension ring; 17. Mounting plate; 18. Second motor; 19. Clamping block; 20. Fixed block; 21. Threaded rod; 22. Locking nut; 23. Anti-slip pad; 24. Limit ring; 25. Plastic buckle; 26. Transparent observation window; 27. Push rod; 28. Positioning rod; 29. Arc-shaped plate; 30. Sandblasting head; 31. Sand conveying pipe; 32. Sand storage tank; 33. Control cylinder; 34. Adjusting plate; 35. Delivery pipe; 36. Steel; 37. Bearing plate. Specific embodiments

[0028] The following further describes in detail the embodiments of the present invention in conjunction with the drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0029] As shown in Figure 1 to Figure 7 shown:

[0030] Embodiment 1: The present invention provides a high-pressure sandblasting and passivation integrated steel pretreatment device, including a processing box 1. Partition boards 2 are provided on the opposite inner sidewalls of the processing box 1, and the opposite surfaces of the two partition boards 2 are movably attached. The two partition boards 2 divide the processing box 1 into a first processing chamber 3 and a second processing chamber 4;

[0031] It further includes a sandblasting assembly. The sandblasting assembly is located in the first processing chamber 3. A bearing box 5 for storing the passivation agent is provided at the bottom of the second processing chamber 4. A placing hole 6 is provided on the top plate of the processing box 1. The steel 36 enters the inside of the processing box 1 through the placing hole 6. Hoisting assemblies are provided on both sides of the placing hole 6 at the top of the processing box 1. Locking and clamping assemblies are provided at both ends of the steel 36, and the hoisting assemblies are connected to the locking and clamping assemblies.

[0032] It should be noted that through the provided processing box 1, two movable and fitting isolation plates 2 are installed inside the processing box 1. The isolation plates 2 divide it into an upper processing chamber one 3 and a processing chamber two 4. The steel material 36 is fixed by a locking and clamping assembly, and through a hoisting assembly, it enters the processing chamber one 3 through the placement hole 6. A sandblasting assembly is installed in the processing chamber one 3, and the steel material 36 can be sandblasted through the sandblasting assembly. The sand material will accumulate on the two isolation plates 2. After sandblasting is completed, the sand material is discharged by opening the discharge hole 10, and then the steel material 36 is lowered so that it can enter the processing chamber two 4. A passivator is placed in the bearing box 5, so that passivation of the steel material 36 can be achieved, realizing the integrated processing of sandblasting and passivation of the steel material 36, which can be achieved in one device, and at the same time, sandblasting and passivation will not interfere with each other. Compared with the traditional sequential method, multiple transfers are avoided, and the processing effect of the steel material 36 is improved.

[0033] In this embodiment, at one end of the two isolation plates 2 away from each other, there is a rotating shaft 7. The rotating shaft 7 is movably arranged in the side plate of the processing box 1. On the outer side wall of the processing box 1 body, there is a motor one 8 connected to an external power supply. The output shaft of the motor one 8 is connected to the rotating shaft 7.

[0034] It should be noted that by setting the rotating shaft 7 on the isolation plate 2, the motor one 8 can drive the rotating shaft 7 to rotate, so that the intercommunication and closing of the processing chamber one 3 and the processing chamber two 4 can be realized. After being closely attached to each other, sand material will not fall into the bearing box 5 in the lower processing chamber two 4 during the sandblasting process of the steel material 36.

[0035] In this embodiment, rubber pads 9 are provided on the opposite surfaces of the two isolation plates 2. When the two rubber pads 9 are attached to each other, the two isolation plates 2 are in a mutually inclined manner and inclined downward toward the direction close to the rotating shaft. On the front and rear side plates of the isolation plate 2, there are discharge holes 10 opposite in position. The discharge holes 10 are located above the rotating shaft. A sealing plate one 11 is provided in the discharge holes 10 for sealing. Symmetrically provided on the outer wall of the sealing plate one 11 are handles 12. On the placement hole 6, there is a sealing plate two 13 for sealing. The same handles 12 are installed on the top of the sealing plate two 13.

[0036] It should be noted that rubber pads 9 are provided on the opposite surfaces of the two isolation plates 2. When the two isolation plates 2 approach and fit each other, the rubber pads 9 are attached to each other. On the one hand, it can protect the isolation plates 2 and improve the tightness between the two isolation plates 2. Moreover, when the isolation plates 2 are designed to be inclined when they are attached, during the sandblasting process, after the sand material falls on the isolation plates 2, it will slide downward on the isolation plates 2 and gradually accumulate at the discharge port. Therefore, after the sealing plate one 11 is opened later, the sand material can directly come out from the discharge port, which is simple and convenient;

[0037] The first sealing plate 11 is fixed on the discharge hole 10 by means of threaded connection. After sandblasting is completed, the first sealing plate 11 can be removed to allow the sand material to come out of the discharge port, enabling the collection of the sand material, which can be put back into the sand storage tank 32 for the next sandblasting.

[0038] In this embodiment, the hoisting assembly includes a cable reel 14, a lifting rope 15, a lifting ring 16 and a mounting plate 17. The cable reels 14 are symmetrically arranged above the top plate of the processing box 1. There is a shaft body inside the cable reel 14. The mounting plate 17 is fixedly installed on the top plate of the processing box 1 and is rotatably connected to both ends of the cable reel 14. The lifting rope 15 is wound around the cable reel 14. The lifting ring 16 is fixedly connected to the other end of the lifting rope 15 and enters the processing box 1 through the placement hole 6. Motors 18 connected to an external power supply are provided on the two sides of the mounting plate 17. The output shaft of the motor 18 passes through the mounting plate 17 and is connected to the shaft body inside the cable reel 14.

[0039] It should be noted that through the set hoisting assembly, the hoisting assembly and the locking and clamping assembly cooperate with each other. After the steel material 36 is fixed, the steel material 36 is placed into the processing box 1 through the placement hole 6. The motor drives the cable reel 14 to rotate, and the length of the lifting rope 15 can be controlled. Thus, after sandblasting is completed, it can be lowered into the second processing chamber 4 for passivation, realizing an integrated processing.

[0040] In this embodiment, the locking and clamping assembly includes clamping blocks 19, fixed blocks 20, threaded rods 21 and locking nuts 22. The number of clamping blocks 19 at one end of the steel material 36 is two, and the vertical cross-sectional profile of the clamping block 19 is "V"-shaped, and the "V"-shaped openings of the two clamping blocks 19 face each other. Anti-slip pads 23 are provided on the opposite surfaces of the two clamping blocks 19, and the anti-slip pads 23 are in mutual contact with the steel material 36. The fixed blocks 20 are fixedly installed at the top and bottom of the clamping blocks 19.

[0041] It should be noted that through the set clamping blocks 19, the clamping blocks 19 are designed in a "V"-shaped manner. On the one hand, it can clamp and fix steel materials 36 with different vertical cross-sectional profiles, improving the flexibility of clamping of the device. Moreover, anti-slip pads 23 are provided on the clamping blocks 19, which can increase the friction between the clamping blocks 19 and the steel material 36, thereby improving the clamping degree.

[0042] In this embodiment, the threaded rods 21 are horizontally symmetrically arranged above and below the clamping blocks 19, and the threaded rods 21 pass through the two fixed blocks 20 at the same horizontal height. A limit ring 24 is provided on the threaded rod 21 between the two fixed blocks 20. The lifting ring 16 is stuck on the threaded rod 21 and between the two limit rings 24. The locking nuts 22 are symmetrically installed on the threaded rod 21. When the clamping blocks 19 complete clamping of the steel material 36, the locking nuts 22 are in close contact with the fixed blocks 20.

[0043] It should be noted that through the provided threaded rod 21 which passes through the fixed block 20, after the clamping block 19 initially clamps the steel material 36, by rotating the locking screw on the threaded rod 21 to be in close contact with the fixed block 20, the clamping block 19 can achieve the final clamping of the steel material 36, ensuring that during the sandblasting process of the steel material 36, the steel material 36 will not fall, and improving the stability during the sandblasting process.

[0044] The lifting ring 16 is stuck between the two limiting rings 24, so as to prevent the lifting ring 16 from moving on the threaded rod 21 during the hoisting process of the steel material 36.

[0045] In this embodiment, plastic buckles 25 are symmetrically arranged on the outer side wall of the clamping block 19. One end of the plastic buckle 25 away from the clamping block 19 is open. Transparent observation windows 26 are arranged on the left and right side plates of the processing box 1. A push rod 27 is movably connected to the transparent observation window 26. A positioning rod 28 is arranged at one end of the push rod 27 extending into the processing box 1. The vertical cross-sectional profile of the positioning rod 28 is "X"-shaped, and the positioning rod 28 cooperates with the plastic buckle 25.

[0046] It should be noted that through the provided plastic buckle 25, after the locking clamping assembly fixes the steel material 36, the hoisting assembly lowers the steel material 36 to a certain height, pushes the push rod 27, and moves the positioning rod 28 towards the steel material 36. The positioning rod 28 is inserted into the plastic buckle 25 through the transparent observation window 26, thereby realizing the position fixation of the steel material 36, and ensuring that during the sandblasting process of the steel material 36 by the sandblasting assembly, the position of the steel material 36 will not move, further improving the stability during the sandblasting process.

[0047] In this embodiment, the sandblasting assembly includes an arc-shaped plate 29, sandblasting nozzles 30, a sand conveying pipe 31 and a sand storage tank 32. Horizontal bearing plates 37 are arranged on the front and rear side walls of the processing box 1. The sand storage tank 32 is installed on the bearing plate 37. The arc-shaped plate 29 is arranged on the left and right sides of the steel material 36. The sandblasting nozzles 30 are spaced apart and circumferentially distributed around the center of the arc-shaped plate 29. One end of the sand conveying pipe 31 is connected to the sandblasting nozzle 30, and the other end is connected to the sand storage tank 32.

[0048] It should be noted that through the provided sandblasting assembly, after the steel material 36 is lowered into the processing chamber 1, the sandblasting assembly can automatically sandblast the steel material 36. The arc-shaped plate 29 is arranged in the processing box 1, and the sandblasting nozzles 30 are evenly arranged on the arc-shaped plate 29, thereby improving the uniformity of sandblasting on the steel material 36 and enhancing the sandblasting effect.

[0049] In this embodiment, control cylinders 33 are provided above the bearing plate 37 and on both sides of the sand storage tank 32. An adjusting plate 34 is provided at the end of the air rod of the control cylinder 33. The adjusting plate 34 movably penetrates into the processing box 1, and the other end of the adjusting plate 34 is fixedly connected to the arc plate 29. A conveying pipe 35 with a valve is provided on one side of the bearing box 5, and the other end of the conveying pipe 35 extends out of the processing box 1.

[0050] It should be noted that through the arranged control cylinder 33, the air rod of the control cylinder 33 is fixed to the adjusting plate 34, and the adjusting plate 34 is connected to the arc plate 29. Thus, the position of the arc plate 29 can be adjusted through the control cylinder 33, and further the distance between the sandblasting head 30 and the steel 36 can be controlled, which can be adjusted according to different sizes of the steel 36, improving flexibility.

[0051] The usage method of the above embodiment is as follows. When sandblasting and passivating treatment is required for the steel 36, sand material is added into the sand storage tank 32. The sand storage tank 32 is connected to an air compressor, so that the sand material can be sent into the sand conveying pipe 31 through pressure. The two clamping blocks 19 are moved close to the end of the steel 36. The threaded rod 21 passes through the fixing block 20, and the locking nut 22 is used in cooperation with the threaded rod 21 to fix the steel 36 with the two clamping blocks 19. At this time, the hanging ring 16 at the bottom end of the hanging rope 15 is stuck between the two limiting rings 24, and the second motor 18 is started to drive the cable reel 14 to rotate, and the hanging rope 15 extends, so that the steel 36 passes below the placing hole 6 into the processing chamber 1.

[0052] Through the transparent observation window 26, when it descends to an appropriate height, the two push rods 27 are pushed, so that the positioning rods 28 at the ends are inserted into the plastic buckles 25, thus realizing the complete fixation of the steel 36. The control cylinder 33 is started to drive the adjusting plate 34 to perform reciprocating displacement. The adjusting plate 34 is fixedly connected to the arc plate 29, and the sandblasting heads 30 are evenly distributed on the arc plate 29. When the sandblasting heads 30 are moved to cover the steel 36 as a whole, the movement of the control cylinder 33 is stopped to perform sandblasting on the surface of the steel 36. At this time, the two isolation plates 2 are attached to each other. After the sand material contacts the steel 36, it will fall onto the isolation plate 2, and the isolation plate 2 is inclined, so it will slide to near the discharge hole 10. However, the discharge hole 10 is blocked by the first sealing plate 11. After sandblasting is completed, the discharge hole 10 is opened, and the sand material comes out from the discharge hole 10, and it can be collected.

[0053] After all the abrasive materials are discharged, the first motor 8 is started at this time to drive the rotating shaft 7 to rotate. The two partition plates 2 rotate upward in opposite directions. When they rotate to a position where the steel material 36 can pass through, the steel material 36 is lowered again. There is a bearing box 5 in the second treatment chamber 4. The passivating agent is conveyed into the bearing box 5 through the conveying pipe 35. The steel material 36 is lowered into the bearing box 5 for passivation. After the passivation is completed, the steel material 36 can be lifted out of the treatment box 1, completing the integrated treatment of sandblasting and passivation of the steel material 36.

[0054] The embodiments of the present invention are given for the purpose of illustration and description. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A high-pressure sandblasting and passivation integrated steel pretreatment device, characterized in that: Including: A processing box (1), on the inner opposite side walls of the processing box (1), there are isolation plates (2), the opposite surfaces of the two isolation plates (2) are movably attached, and the two isolation plates (2) divide the processing box (1) into a first processing chamber (3) and a second processing chamber (4); It further includes a sandblasting assembly. The sandblasting assembly is located in the first processing chamber (3). At the bottom of the second processing chamber (4), there is a bearing box (5) for storing passivating agent. On the top plate of the processing box (1), there is a placement hole (6). The steel material (36) enters the interior of the processing box (1) through the placement hole (6). On the top of the processing box (1) and on both sides of the placement hole (6), there is a hoisting assembly. At both ends of the steel material (36), there is a locking and clamping assembly, and the hoisting assembly is connected to the locking and clamping assembly.

2. The integrated high-pressure sandblasting and passivation steel pretreatment device according to claim 1, wherein: At one end of the two isolation plates (2) away from each other, there is a rotating shaft (7). The rotating shaft (7) is movably arranged in the side plate of the processing box (1). On the outer side wall of the processing box (1) body, there is a motor one (8) connected to an external power supply. The output shaft of the motor one (8) is connected to the rotating shaft (7).

3. The integrated high-pressure sandblasting and passivation steel pretreatment device according to claim 2, characterized in that: On the opposite surfaces of the two isolation plates (2), there are rubber pads (9). When the two rubber pads (9) are attached to each other, the two isolation plates (2) are inclined in a mutually inclined manner and inclined downward toward the direction close to the rotating shaft. On the front and rear side plates of the isolation plate (2), there are discharge holes (10) opposite in position. The discharge holes (10) are located above the rotating shaft. In the discharge holes (10), there is a sealing plate one (11) for sealing it. On the outer wall of the sealing plate one (11), there are symmetrically arranged handles (12). On the placement hole (6), there is a sealing plate two (13) for sealing it. On the top of the sealing plate two (13), there is an identical handle (12) installed.

4. The integrated high-pressure sandblasting and passivation steel pretreatment device according to claim 1, characterized in that: The hoisting assembly includes a cable reel (14), a lifting rope (15), a lifting ring (16) and a mounting plate (17). The cable reels (14) are symmetrically arranged above the top plate of the processing box (1). Inside the cable reel (14), there is a shaft body. The mounting plate (17) is fixedly installed on the top plate of the processing box (1) and is rotatably connected to both ends of the cable reel (14). The lifting rope (15) is wound around the cable reel (14). The lifting ring (16) is fixedly connected to the other end of the lifting rope (15) and enters the interior of the processing box (1) through the placement hole (6). On both sides of the mounting plate (17), there is a motor two (18) connected to an external power supply. The output shaft of the motor two (18) passes through the mounting plate (17) and is connected to the shaft body inside the cable reel (14).

5. The integrated high-pressure sandblasting and passivation steel pretreatment device according to claim 4, characterized in that: The locking and clamping assembly includes clamping blocks (19), fixed blocks (20), threaded rods (21) and locking nuts (22). There are two clamping blocks (19) at one end of the steel (36). The vertical cross-sectional profile of the clamping blocks (19) is "V"-shaped, and the "V"-shaped openings of the two clamping blocks (19) face each other. Anti-slip pads (23) are provided on the opposite surfaces of the two clamping blocks (19). The anti-slip pads (23) are in mutual contact with the steel (36). The fixed blocks (20) are fixedly installed at the top and bottom of the clamping blocks (19).

6. The integrated high-pressure sandblasting and passivation steel pretreatment device according to claim 5, characterized in that: The threaded rods (21) are horizontally symmetrically arranged above and below the clamping blocks (19), and the threaded rods (21) pass through the two fixed blocks (20) at the same horizontal height. A limit ring (24) is provided on the threaded rod (21) between the two fixed blocks (20). The lifting ring (16) is stuck on the threaded rod (21) between the two limit rings (24). The locking nuts (22) are symmetrically installed on the threaded rods (21). When the clamping blocks (19) complete clamping the steel (36), the locking nuts (22) are in close contact with the fixed blocks (20).

7. The integrated high-pressure sandblasting and passivation steel pretreatment device according to claim 6, characterized in that: Plastic buckles (25) are symmetrically provided on the outer side walls of the clamping blocks (19). One end of the plastic buckle (25) away from the clamping block (19) is open. Transparent observation windows (26) are provided on the left and right side plates of the processing box (1). A push rod (27) with a movable connection is provided on the transparent observation window (26). A positioning rod (28) is provided at one end of the push rod (27) extending into the processing box (1). The vertical cross-sectional profile of the positioning rod (28) is "X"-shaped, and the positioning rod (28) cooperates with the plastic buckle (25).

8. The integrated high-pressure sandblasting and passivation steel pretreatment device according to claim 1, characterized in that: The sandblasting assembly includes an arc plate (29), sandblasting nozzles (30), sand conveying pipes (31) and a sand storage tank (32). Horizontal bearing plates (37) are provided on the front and rear side walls of the processing box (1). The sand storage tank (32) is installed on the bearing plate (37). The arc plate (29) is arranged on the left and right sides of the steel (36). The sandblasting nozzles (30) are spaced apart on the arc plate (29) and are circumferentially distributed around the center of the arc plate (29). One end of the sand conveying pipe (31) is connected to the sandblasting nozzle (30), and the other end is connected to the sand storage tank (32).

9. The integrated high-pressure sandblasting and passivation steel pretreatment device according to claim 8, characterized in that: Control cylinders (33) are provided on the bearing plate (37) on both sides of the sand storage tank (32). An adjusting plate (34) is provided at the end of the air rod of the control cylinder (33). The adjusting plate (34) movably penetrates into the processing box (1), and the other end of the adjusting plate (34) is fixedly connected to the arc plate (29). A conveying pipe (35) with a valve is provided on one side of the loading box (5). The other end of the conveying pipe (35) extends out of the processing box (1).

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