Metal surface treatment reaction platform capable of recycling waste liquid

By designing a metal surface treatment platform including lifting frames, curved frames and recycling components, the safety problem of metal surface treatment agent splash is solved, and the recycling of waste liquid is realized, improving operational safety and reducing costs.

CN120060864AInactive Publication Date: 2025-05-30TONGLING HUIPING ENVIRONMENTAL PROTECTION TECH CO LTD
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Patent Information

Application Number
CN202510320005.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-03-18
Publication Date
2025-05-30
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

In the existing metal surface treatment technology, the metal surface treatment agent needs to be fully in contact with and soaked with the metal surface, resulting in the possible splash of the treatment agent during the treatment process, endangering the health of the operator.

Method used

A reaction platform for metal surface treatment for recyclable waste liquid was designed. The platform includes a lifting frame, a curved frame, a motor-driven thread sleeve and recycling components. Through the lifting frame and the flip of the curved frame, the metal surface can be fully treated, and the recycling of waste liquid can be realized through the recycling components.

Benefits of technology

Through this platform, the risk of metal surface treatment agent splashing is avoided, operational safety is improved, and treatment costs are reduced through the recycling of waste liquid.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention belongs to the technical field of metal surface treatment, and discloses a metal surface treatment reaction platform capable of recycling waste liquid, the metal surface treatment reaction platform comprises a soaking pool, a treatment mechanism is arranged in the soaking pool, and the treatment mechanism extends to the outer side of the soaking pool. After metal is placed in the lifting frame, the motor is started to rotate reversely, after the lifting frame is completely embedded into the soaking pool, reaction liquid is poured into the soaking pool, after the surface of the metal is fully soaked in the reaction liquid, the bottom of the metal can be lifted to the top of the soaking pool according to the same principle, the arc-shaped frame is opened, and then the metal is soaked in the reaction liquid. According to the metal surface treatment device, after metal is turned over, soaking is conducted again, reaction treatment can be conducted on each face of the metal surface, and through the structure, the problem that health is damaged due to the risk that a metal surface treatment agent splashes and makes direct contact with limbs possibly is solved.
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Description

Technical Field

[0001] This application relates to the technical field of metal surface treatment. More specifically, it relates to a reaction platform for metal surface treatment that can recycle waste liquid. Background Art

[0002] Traditionally, sulfuric acid, hydrochloric acid, phosphoric acid, etc. are usually used to clean the metal surface. In addition to the rust removal function, a phosphating film can also be formed on the metal surface to play an anti-rust role. Since it is corrosive, it will cause environmental pollution. Now, metal surface treatment agents are mostly used to replace this reagent to treat the metal surface. Since the metal surface treatment agent needs to be in full contact with and soak the metal surface for further reaction on the metal surface, reaction equipment is required to cooperate with the metal surface treatment agent to react on metal objects.

[0003] When the existing metal surface treatment agent is used in reaction, the metal needs to be immersed in the metal surface treatment agent. Most of them clamp the metal through a fixture, place the metal in the metal surface treatment agent, and then soak it for a long time. Due to the relatively single functionality, the metal inside the metal surface treatment agent needs to be directly clamped and flipped later. If the clamping is unstable and the metal falls, there may be a risk of the metal surface treatment agent splashing and directly contacting the body, resulting in health damage.

[0004] To solve the above problems, this application provides a reaction platform for metal surface treatment that can recycle waste liquid. Summary of the Invention

[0005] The reaction platform for metal surface treatment that can recycle waste liquid provided by this application adopts the following technical solutions:

[0006] A reaction platform for metal surface treatment that can recycle waste liquid, including a soaking pool. A treatment mechanism is provided inside the soaking pool, and the treatment mechanism extends outside the soaking pool. The treatment mechanism includes a recycling component and a disassembly and assembly component;

[0007] The treatment mechanism includes a lifting frame. The lifting frame is embedded inside the soaking pool. A plurality of through grooves are opened inside the lifting frame. A rotating rod is fixedly embedded inside the lifting frame. An arc-shaped frame is sleeved outside the rotating rod. The top of the arc-shaped frame is made of anti-slip material. A plurality of straight rods are fixedly embedded inside the arc-shaped frame. A connecting block is fixedly connected to the top of the lifting frame. A cross plate is fixedly sleeved outside the two connecting blocks. A connecting frame is fixedly connected to the top of the cross plate. A threaded rod is fixedly embedded inside the connecting frame. A threaded sleeve is screwed on the outer wall of the threaded rod. The bottom of the soaking pool is fixedly connected to a base. The end of the threaded sleeve extends inside the base. A motor is fixedly connected to the bottom of the base. The output shaft of the motor is fixedly connected to the bottom end of the threaded rod. An auxiliary component is provided outside the motor.

[0008] Further, the auxiliary component includes an anti - detachment block. The anti - detachment block is fixedly connected to the top end of the threaded rod. The anti - detachment block is located at the top of the connecting frame. The connection between the threaded sleeve and the base is movably connected through a bearing. The connection between the rotating rod and the lifting frame is movably connected through a bearing.

[0009] Through the above - mentioned technical solution, by setting the anti - detachment block, the connection between the threaded rod and the connecting frame can be strengthened, avoiding detachment.

[0010] Further, two telescopic rods are fixedly embedded inside the lifting frame. The two telescopic rods are symmetrically arranged with respect to the mid - line of the lifting frame. The bottom ends of the two telescopic rods are both fixedly connected to the base.

[0011] Through the above - mentioned technical solution, by setting two telescopic rods, the purpose of limiting the lifting frame can be achieved, and further, the lifting frame can move up and down more stably and firmly.

[0012] Further, the multiple through - slots and the multiple straight rods are both evenly distributed. The bottom of the base is fixedly connected with multiple support legs, and the multiple support legs are evenly distributed.

[0013] Through the above - mentioned technical solution, by setting multiple support legs, the purpose of supporting the base can be achieved, and further, the equipment can be more firmly used during operation.

[0014] Further, the recycling component includes two recycling pipes. One end of each of the two recycling pipes is fixedly embedded in the inner wall of the soaking pool, and a connection head is fixedly connected to one end of each of the two recycling pipes.

[0015] Further, an L - shaped pipe is fixedly connected to one side of the connection head. A valve one is sleeved outside the L - shaped pipe. A support block is fixedly connected to the top of the base. A purification box is fixedly connected to the top of the support block and the connection head. The purification box is located on one side of the threaded sleeve.

[0016] Through the above - mentioned technical solution, by setting the support block, the purpose of lifting and supporting the purification box can be achieved, avoiding affecting the use of the L - shaped pipe.

[0017] Further, the top end of the L - shaped pipe extends into the purification box and is fixedly connected to a water pump one. A pipe one is fixedly connected to the top of the water pump one. A filter element is provided at the top of the pipe one. A bent pipe is fixedly embedded in one side inner wall of the purification box. One end of the bent pipe is fixedly connected to a water pump two. A pipe two is fixedly connected to one side of the water pump two. A valve two is sleeved outside the pipe two.

[0018] Through the above technical solution, by setting the first water pump, the remaining waste liquid can be transported into the purification tank. At the same time, the second water pump can transport the purified waste liquid back into the soaking pool for secondary utilization, thereby achieving the purpose of reducing costs.

[0019] Further, a hose is fixedly embedded in one inner wall of the soaking pool. A threaded ring is sleeved on the outer side of one end of the hose. The connection between the threaded ring and the hose is movably connected through a bearing. One end of the threaded ring is threadedly sleeved on the outer side of one end of the second pipe.

[0020] Through the above technical solution, by setting the threaded ring, it is convenient to fixedly connect the hose and the second pipe in the later stage.

[0021] Further, the disassembly and assembly component includes two fixing strips. The two fixing strips are respectively fixedly connected to the inner walls on both sides of the purification tank. The two fixing strips are symmetrically arranged with the midline of the purification tank as the axis. An installation frame is provided on the tops of the two fixing strips.

[0022] Through the above technical solution, by setting the two fixing strips, the installation frame can be supported, so that the filter element can be placed more stably.

[0023] Further, the installation frame is sleeved on the outside of the filter element. A top cover is provided on the top of the purification tank. The inner side of the top cover is attached to the top of the installation frame. The top cover and the purification tank are movably connected through a hinge.

[0024] Through the above technical solution, by setting the hinge, the top cover can be flipped in the later stage to facilitate the quick taking and placing of the filter element.

[0025] In summary, the present application includes the following beneficial technical effects:

[0026] In this invention, after starting the motor and making the lifting frame located on the top of the soaking pool, the arc-shaped frame can be opened. After placing the metal in the lifting frame, start the motor again to make the motor rotate in the reverse direction. When the lifting frame is completely embedded in the soaking pool, pour the reaction liquid into the soaking pool. When the surface of the metal is fully soaked by the reaction liquid, for the bottom of the metal, by the same token, first raise the lifting frame to the top of the soaking pool, open the arc-shaped frame, flip the metal, and then soak it again, so as to complete the reaction treatment of each side of the metal surface. Through the above structure, the risk that the metal surface treatment agent may splash and directly contact the body, resulting in health damage, is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is the overall structural schematic diagram of the present application;

[0028] Figure 2 is the partial cross-sectional perspective view of the present application;

[0029] Figure 3 is the external three-dimensional view of the filter element of the present application;

[0030] Figure 4 is the opened three-dimensional view of the arc-shaped frame of the present application;

[0031] Figure 5 is of the present application Figure 2 is the enlarged view of the structure at A in;

[0032] Figure 6 is of the present application Figure 4 is the enlarged view of the structure at B in.

[0033] Explanation of the reference numerals in the figure:

[0034] 1. Soaking pool; 2. Lifting frame; 3. Rotating rod; 4. Arc-shaped frame; 5. Straight rod; 6. Connecting block; 7. Cross plate; 8. Connecting frame; 9. Threaded rod; 10. Threaded sleeve; 11. Base; 12. Motor; 13. Anti-detachment block; 14. Telescopic rod; 15. Support leg; 16. Recovery pipe; 17. Connector; 18. L-shaped pipe; 19. Valve 1; 20. Support block; 21. Purification tank; 22. Water pump 1; 23. Pipe 1; 24. Filter element; 25. Bent pipe; 26. Water pump 2; 27. Pipe 2; 28. Valve 2; 29. Hose; 30. Threaded ring; 31. Fixed strip; 32. Installation frame; 33. Top cover. Specific embodiments

[0035] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application; obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0036] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "top / bottom end", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0037] In the description of this application, it should be noted that unless otherwise clearly specified and limited, terms such as "installation", "equipped with", "sheathed / connected", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0038] Embodiment:

[0039] An embodiment of this application discloses a reaction platform for metal surface treatment that can recycle waste liquid. Please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6 , including a soaking pool 1. A processing mechanism is provided inside the soaking pool 1, and the processing mechanism extends to the outside of the soaking pool 1. The processing mechanism includes a recycling component and a disassembly and assembly component;

[0040] The processing mechanism includes a lifting frame 2. The lifting frame 2 is embedded inside the soaking pool 1. A plurality of through grooves are opened inside the lifting frame 2. A rotating rod 3 is fixedly embedded inside the lifting frame 2. An arc-shaped frame 4 is sleeved on the outside. The top of the arc-shaped frame 4 is made of anti-slip material. A plurality of straight rods 5 are fixedly embedded inside the arc-shaped frame 4. A connecting block 6 is fixedly connected to the top of the lifting frame 2. A cross plate 7 is fixedly sleeved on the outside of the two connecting blocks 6. A connecting frame 8 is fixedly connected to the top of the cross plate 7. A threaded rod 9 is fixedly embedded inside the connecting frame 8. A threaded sleeve 10 is screwed on the outer wall of the threaded rod 9. A base 11 is fixedly connected to the bottom of the soaking pool 1. The end of the threaded sleeve 10 extends into the base 11. A motor 12 is fixedly connected to the bottom of the base 11. The output shaft of the motor 12 is fixedly connected to the bottom end of the threaded rod 9;

[0041] Please refer to Figure 1 、 Figure 2 and Figure 4 , an auxiliary component is provided outside the motor 12. The auxiliary component includes an anti-detachment block 13. The anti-detachment block 13 is fixedly connected to the top end of the threaded rod 9. The anti-detachment block 13 is located on the top of the connecting frame 8. The connection between the threaded sleeve 10 and the base 11 is movably connected through a bearing. The connection between the rotating rod 3 and the lifting frame 2 is movably connected through a bearing. By setting the anti-detachment block 13, the connection between the threaded rod 9 and the connecting frame 8 can be strengthened, and the occurrence of detachment can be avoided;

[0042] Please refer to Figure 1 and Figure 4, two telescopic rods 14 are fixedly embedded inside the lifting frame 2. The two telescopic rods 14 are symmetrically arranged with the midline of the lifting frame 2 as the axis. The bottom ends of the two telescopic rods 14 are fixedly connected to the base 11. The multiple through slots and the multiple straight rods 5 are both evenly distributed. A plurality of support legs 15 are fixedly connected to the bottom of the base 11, and the multiple support legs 15 are evenly distributed. By setting the two telescopic rods 14, the lifting frame 2 can be limited, so that the lifting frame 2 can move more stably and firmly up and down. At the same time, by setting the multiple support legs 15, the base 11 can be supported, so that the equipment can be more firmly fixed during use;

[0043] Please refer to Figure 1 and Figure 2 , the recycling component includes two recycling pipes 16. One ends of the two recycling pipes 16 are fixedly embedded in the inner wall of the soaking pool 1. One ends of the two recycling pipes 16 are fixedly connected with a connector 17. A connector 17 is fixedly connected with an L-shaped pipe 18 on one side. A valve one 19 is sleeved outside the L-shaped pipe 18. A support block 20 is fixedly connected to the top of the base 11. A purification box 21 is fixedly connected to the top of the support block 20 and the connector 17. The purification box 21 is located on one side of the threaded sleeve 10. By setting the support block 20, the purification box 21 can be supported and elevated to avoid affecting the use of the L-shaped pipe 18;

[0044] Please refer to Figure 1 and Figure 2 , the top end of the L-shaped pipe 18 extends into the purification box 21 and is fixedly connected with a water pump one 22. A water pump one 22 is fixedly connected with a pipe one 23 at the top. A filter element 24 is arranged at the top of the pipe one 23. A bent pipe 25 is fixedly embedded in one side inner wall of the purification box 21. One end of the bent pipe 25 is fixedly connected with a water pump two 26. A water pump two 26 is fixedly connected with a pipe two 27 on one side. A valve two 28 is sleeved outside the pipe two 27. A hose 29 is fixedly embedded in one side inner wall of the soaking pool 1. A threaded ring 30 is sleeved outside one end of the hose 29. The connection between the threaded ring 30 and the hose 29 is movably connected through a bearing. One end of the threaded ring 30 is threadedly sleeved on the outside of one end of the pipe two 27. By setting the water pump one 22, the remaining waste liquid can be transported into the purification box 21. At the same time, the water pump two 26 can transport the purified waste liquid back into the soaking pool 1 for secondary utilization, so as to reduce costs. At the same time, by setting the threaded ring 30, it is convenient to fixedly connect the hose 29 and the pipe two 27 in the later stage;

[0045] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 5, the disassembly and assembly component includes two fixing bars 31, the two fixing bars 31 are respectively fixedly connected to the inner walls on both sides of the purification box 21, the two fixing bars 31 are symmetrically arranged with the central line of the purification box 21 as the axis, an installation frame 32 is provided at the top of the two fixing bars 31, the installation frame 32 is sleeved outside the filter element 24, a top cover 33 is provided at the top of the purification box 21, the inner side of the top cover 33 is fitted with the top of the installation frame, and the top cover 33 is movably connected to the purification box 21 through a hinge. By providing the two fixing bars 31, the installation frame 32 can be supported, so that the filter element 24 can be placed more stably. At the same time, by setting the hinge, the top cover 33 can be flipped later to facilitate the quick taking and placing of the filter element 24.

[0046] The implementation principle of this embodiment is as follows: First, the motor 12 can be started, and the threaded sleeve 10 is driven to rotate by the output shaft of the motor 12. Since there are two telescopic rods 14, the lifting frame 2 can be limited. Therefore, the lifting frame 2 can be driven to move vertically upward through the connecting frame 8, the cross plate 7 and the two connecting blocks 6. When the lifting frame 2 is located above the soaking pool 1, the arc-shaped frame 4 can be rotated by means of a tool through the rotating rod 3 and opened. Then, after the metal is placed inside the lifting frame 2, the arc-shaped frame 4 can be closed again by means of a tool. Since the top of the arc-shaped frame 4 is made of anti-slip material here, the friction between the arc-shaped frame 4 and the lifting frame 2 can be enhanced, and the self-rotation of the arc-shaped frame 4 can be avoided, which affects the normal use. Then, the motor 12 is started again to make the motor 12 rotate in the reverse direction. When the lifting frame 2 is completely embedded inside the soaking pool 1, the reaction liquid is poured into the soaking pool 1. Here, the density of the metal is greater than the density of the reaction liquid, so the metal will not float on the surface of the reaction liquid. When the surface of the metal is fully soaked in the reaction liquid, the bottom of the metal can be treated in the same way as above. First, the lifting frame 2 is raised to the top of the soaking pool 1, the arc-shaped frame 4 is opened, and after the metal is flipped, it is soaked again, so that each side of the metal surface can be subjected to the reaction treatment. Through the above structure, the risk that the metal surface treatment agent may splash and directly contact the body, resulting in health damage, is avoided;

[0047] Later, the first valve 19 and the first water pump 22 can be opened. At this time, the remaining waste liquid will enter the inside of the connector 17 through the two recovery pipes 16, and then enter the inside of the purification box 21 through the L-shaped pipe 18 and the first pipe 23. With the treatment of the reverse osmosis membrane, the biological adsorbent and the activated carbon inside the filter element 24, the waste liquid is filtered. As the filtered liquid spreads and rises to the top of the filter element 24, at the same time, the second valve 28 and the second water pump 26, under the pumping of the second water pump 26, the recovered liquid is re-injected into the soaking pool 1 through the bent pipe 25 and the hose 29 for recycling;

[0048] When the filter element 24 needs to be replaced, the top cover 33 can be flipped upward and opened through the hinge. Since the sealing gasket is fixedly connected to the inner wall of the top cover 33, the sealing performance between the top cover 33 and the purification tank 21 can be ensured. Subsequently, the filter element 24 can be taken out from the inside of the purification tank 21 through the mounting bracket for replacement.

[0049] The above are all the preferred embodiments of this application, and the protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A reaction platform for metal surface treatment with recyclable waste liquid, comprising a soaking tank (1), characterized in that: A processing mechanism is provided inside the soaking tank (1), the processing mechanism extends to the outside of the soaking tank (1), and the processing mechanism comprises a recovery component and a disassembly component; The processing mechanism comprises a lifting frame (2), the lifting frame (2) is embedded in the soaking tank (1), a plurality of through slots are provided in the lifting frame (2), a rotating rod (3) is fixedly embedded in the lifting frame (2), an arc frame (4) is sleeved on the outside, the top of the arc frame (4) is made of anti-slip material, a plurality of straight rods (5) are fixedly embedded in the arc frame (4), a connecting block (6) is fixedly connected to the top of the lifting frame (2), and a horizontal plate (7) is fixedly sleeved on the outside of the two connecting blocks (6). ), the top of the horizontal plate (7) is fixedly connected to a connecting frame (8), a threaded rod (9) is fixedly embedded inside the connecting frame (8), a threaded sleeve (10) is screwed on the outer wall of the threaded rod (9), the bottom of the immersion tank (1) is fixedly connected to a base (11), the end of the threaded sleeve (10) extends to the inside of the base (11), the bottom of the base (11) is fixedly connected to a motor (12), the output shaft of the motor (12) is fixedly connected to the bottom end of the threaded rod (9), and auxiliary components are provided on the outside of the motor (12).

2. The reaction platform for metal surface treatment of recyclable waste liquid according to claim 1, characterized in that: The auxiliary component comprises an anti-slip block (13), the anti-slip block (13) is fixedly connected to the top of the threaded rod (9), the anti-slip block (13) is located at the top of the connecting frame (8), the threaded sleeve (10) and the base (11) are movably connected at the connection point via a bearing, and the rotating rod (3) and the lifting frame (2) are movably connected at the connection point via a bearing.

3. The reaction platform for metal surface treatment of recyclable waste liquid according to claim 1, characterized in that: Two telescopic rods (14) are fixedly embedded inside the lifting frame (2). The two telescopic rods (14) are symmetrically arranged with the center line of the lifting frame (2) as an axis, and the bottom ends of the two telescopic rods (14) are fixedly connected to the base (11).

4. The reaction platform for metal surface treatment of recyclable waste liquid according to claim 1, characterized in that: The plurality of through slots and the plurality of straight rods (5) are evenly distributed, the bottom of the base (11) is fixedly connected with a plurality of supporting legs (15), and the plurality of supporting legs (15) are evenly distributed.

5. The reaction platform for metal surface treatment of recyclable waste liquid according to claim 1, characterized in that: The recovery component comprises two recovery pipes (16), one end of each of the two recovery pipes (16) is fixedly embedded in the inner wall of the soaking tank (1), and one end of each of the two recovery pipes (16) is fixedly connected to a connector (17).

6. The reaction platform for metal surface treatment of recyclable waste liquid according to claim 5, characterized in that: An L-shaped tube (18) is fixedly connected to one side of the connector (17), a valve (19) is sleeved on the outside of the L-shaped tube (18), a support block (20) is fixedly connected to the top of the base (11), a purification box (21) is fixedly connected to the support block (20) and the top of the connector (17), and the purification box (21) is located on one side of the threaded sleeve (10).

7. The reaction platform for metal surface treatment of recyclable waste liquid according to claim 6, characterized in that: The top end of the L-shaped tube (18) extends into the interior of the purification box (21) and is fixedly connected to a water pump (22); the top of the water pump (22) is fixedly connected to a pipe (23); a filter element (24) is provided on the top of the pipe (23); a bent tube (25) is fixedly embedded in the inner wall of one side of the purification box (21); one end of the bent tube (25) is fixedly connected to a water pump (26); one side of the water pump (26) is fixedly connected to a pipe (27); and a valve (28) is sleeved on the outer side of the pipe (27).

8. The reaction platform for metal surface treatment of recyclable waste liquid according to claim 1, characterized in that: A hose (29) is fixedly embedded in the inner wall of one side of the soaking tank (1), and a threaded ring (30) is sleeved on the outer side of one end of the hose (29). The threaded ring (30) and the hose (29) are movably connected at the connection point via a bearing, and one end of the threaded ring (30) is threadedly sleeved (10) and connected to the outer side of one end of the second pipe (27).

9. The reaction platform for metal surface treatment of recyclable waste liquid according to claim 1, characterized in that: The disassembly and assembly components include two fixing bars (31), the two fixing bars (31) are respectively fixedly connected to the inner walls on both sides of the purification box (21), the two fixing bars (31) are symmetrically arranged with the center line of the purification box (21) as the axis, and the tops of the two fixing bars (31) are provided with installation frames (32).

10. The reaction platform for metal surface treatment of recyclable waste liquid according to claim 9, characterized in that: The mounting frame (32) is sleeved on the outside of the filter element (24); a top cover (33) is provided on the top of the purification box (21); the inner side of the top cover (33) is in contact with the top of the mounting frame; and the top cover (33) and the purification box (21) are movably connected via a hinge.