Efficient workpiece surface treatment device based on liquid soaking

Abstract

The invention discloses an efficient workpiece surface treatment device based on liquid soaking. The efficient workpiece surface treatment device comprises a rack and a vacuumizing main machine. One side of the rack is provided with a containing pool with an upper opening, and the other side of the rack is provided with a mounting position for mounting the vacuumizing main machine; a vacuumizing opening and a vacuum breaking opening are formed in the side wall, close to the mounting position, of the containing pool; a sealing cover driven by an air cylinder is arranged on the upper side of the rack, rails extending from the mounting position side to the containing pool side are arranged on the two side walls of the rack, the rails comprise bottom rails and side rails, wheel assemblies are arranged on the two sides of the sealing cover, and the wheel assemblies comprise vertical wheels and horizontal wheels; the vertical wheels roll along the bottom rail, and the horizontal wheels roll along the side rails, so that the sealing cover moves between the mounting position and the containing pool; a concave groove is formed in the bottom rail, and when the sealing cover moves to the side of the containing pool, the vertical wheel enters the concave groove to enable the sealing cover to move downwards and extrude the sealing ring on the upper edge of the containing pool to seal the containing pool; and the vacuum host is used for performing vacuum defoaming on the liquid in the accommodating tank through the vacuumizing opening.

Description

Technical Field

[0001] The present invention relates to the technical field of surface treatment of die-castings, and more particularly to an efficient workpiece surface treatment device based on liquid immersion. Background Art

[0002] In modern industrial production, the surface treatment of small shell-like products is a key link, especially in the fields of electronics, machinery, and chemical engineering. These products usually need to be treated by chemical solution immersion to achieve processes such as cleaning, etching, and coating. However, due to many small holes at the corners and edges of the products, when the products are put into the liquid, due to the surface tension of water, a part of the air cannot be excluded at the bottom of the holes, resulting in the chemical solution not being able to completely enter the interior of the product holes, thus affecting the product quality. This phenomenon is relatively common in actual production, resulting in a high defective rate of products.

[0003] Early treatment methods usually required manual treatment or the use of centrifugal force equipment. Manual treatment is not only inefficient but also difficult to ensure the uniformity and consistency of treatment, resulting in a low qualified rate of products. Although centrifugal force equipment can solve the bubble problem to a certain extent, its structure is complex, its stability is poor, and its technical requirements for operators are high, further limiting its wide application in actual production. Vacuum bubble-breaking technology, as a relatively advanced bubble-breaking method, is widely used. Its principle is to reduce the pressure in the system to make the bubbles in the liquid expand and burst.

[0004] For example, the patent of CN112490145B discloses a vacuum degassing device. This device places a semiconductor material silicon wafer in a feeding container and uses a feeding device to send it into the degassing device, and removes the bubbles on the bonding surface of the silicon wafer by evacuating and filling inert gas. However, this device is mainly for the degassing treatment of semiconductor materials, and its applicability and efficiency for the surface treatment of small shell-like products, especially the bubble problem during the chemical solution immersion process, still need to be improved.

[0005] Another example is that the patent of CN214913622U discloses a vacuum degassing device for liquid crystal materials. This device firmly installs a vacuum pump on the vacuum degassing device through a fixing device and ensures the sealing between the protection door and the device through a limiting device. Although this device has certain improvements in vacuum degassing, its main target is the degassing treatment of liquid crystal materials, and its solution to the bubble problem encountered by small shell-like products during the chemical solution immersion process still has limitations.

[0006] In summary, the existing surface treatment equipment and technology still have obvious shortcomings when treating small shell products, especially in the process of chemical solution immersion. For example, the vacuum degree of some vacuum bubble breaking equipment is not high enough to effectively remove tiny bubbles, resulting in unsatisfactory treatment effect. Therefore, developing a new type of surface treatment equipment that can effectively solve the bubble problem, improve treatment efficiency and product quality is a technical problem that needs to be solved urgently in current industrial production. Summary of the invention

[0007] The technical problem to be solved by the present invention is to provide a more efficient workpiece surface treatment device based on liquid immersion.

[0008] The technical solution adopted by the present invention to solve the above technical problems is: a high-efficiency workpiece surface treatment device based on liquid immersion, comprising a frame and a vacuum mainframe; a holding pool with an upper opening is provided on one side of the frame and a mounting position for placing the vacuum mainframe is provided on the other side; a vacuum port and a vacuum breaking port are provided on the side wall of the holding pool close to the mounting position;

[0009] A closed cover driven by a cylinder is provided on the upper side of the frame, and tracks extending from the mounting position to the receiving pool are provided on both side walls of the frame, the tracks include a bottom track and a side track, and wheel assemblies are provided on both sides of the closed cover, the wheel assemblies include vertical wheels and horizontal wheels; the vertical wheels roll along the bottom track, and the horizontal wheels roll along the side track, so that the closed cover moves between the mounting position and the receiving pool;

[0010] The bottom rail is provided with a recessed groove, and when the closing cover moves to the side of the receiving pool, the vertical wheel enters the recessed groove to move the closing cover downward and squeeze the sealing ring on the upper edge of the receiving pool to close the receiving pool;

[0011] The vacuum host performs a vacuum operation on the containing pool through the vacuum port.

[0012] The preferred technical solution adopted by the present invention to solve the above-mentioned technical problems is: a base connected to the piston rod of the cylinder is provided above the closing cover, the base is provided with a U-shaped groove, a limit head is provided at the end of the piston rod, the limit head is provided with a first limit wall and a second limit wall, and an annular limit recess is provided between the first limit wall and the second limit wall; the limit head passes through the U-shaped groove of the base, the first limit wall and the second limit wall are respectively located on both sides of the base, and the annular limit recess is located in the U-shaped groove and can move up and down in the U-shaped groove.

[0013] The preferred technical solution adopted by the present invention to solve the above technical problem is: a U-shaped recessed area surrounding the U-shaped groove is provided on the side of the base away from the piston rod, and the first limiting wall is located in the U-shaped recessed area.

[0014] The preferred technical solution adopted by the present invention to solve the above technical problems is as follows: grating sensors are provided on both side walls of the frame on the side of the receiving pool, and the grating sensors detect the displacement of the closing cover and foreign objects within the sensing area.

[0015] The preferred technical solution adopted by the present invention to solve the above technical problems is as follows: there is also a protective cover above the closing cover on the side of the installation position, and the closing cover moves below the protective cover.

[0016] The preferred technical solution adopted by the present invention to solve the above technical problems is as follows: a wheel assembly is provided at each of the four corners of the closing cover. Each wheel assembly includes a vertical wheel and a horizontal wheel. In the same wheel assembly, the vertical wheel is located on the side closer to the receiving pool relative to the horizontal wheel, and there is a gap distance between the bottom of the horizontal wheel and the upper surface of the bottom rail.

[0017] The preferred technical solution adopted by the present invention to solve the above technical problems is as follows: three recessed grooves are provided on each side of the bottom rail: a front recessed groove, a middle recessed groove, and a rear recessed groove; the front recessed groove is located at the end of the bottom rail on the side of the receiving pool, the middle recessed groove is located at a position close to the side of the receiving pool on the installation position side, and the rear recessed groove is located at the end of the bottom rail on the installation position side.

[0018] When the vertical wheels of the closing cover are respectively located in the front recessed groove and the middle recessed groove, the closing cover closes the receiving pool; when the vertical wheels of the closing cover are respectively located in the middle recessed groove and the rear recessed groove, the closing cover closes the upper part of the installation position.

[0019] The preferred technical solution adopted by the present invention to solve the above technical problems is as follows: it further includes an oil-water separator and a gas-water separator located on one side of the frame and connected to each other through pipelines. The upstream of the oil-water separator is connected to the receiving pool, and the downstream of the gas-water separator is connected to the vacuum pumping host.

[0020] The preferred technical solution adopted by the present invention to solve the above technical problems is as follows: it includes a controller, and the vacuum pumping host, the cylinder, and the grating sensors are signal-connected to the controller.

[0021] Two toggle switches are provided on one side of the frame, and there is a distance between the two toggle switches.

[0022] The preferred technical solution adopted by the present invention to solve the above technical problems is as follows: when the two toggle switches are toggled simultaneously, the controller controls the cylinder to move so that the closing door moves towards the side of the receiving pool; when the grating sensor senses that the closing door closes the receiving pool and transmits the signal to the controller, the controller sends an instruction to the vacuum pumping host to start the vacuum pumping operation.

[0023] The grating sensor senses that there is a foreign object on the moving path of the enclosed door. The grating sensor conducts the signal to the controller, and the controller sends an instruction to the cylinder, causing the cylinder to stop running.

[0024] Compared with the prior art, the advantages of the present invention are as follows: By using the movement of the closing cover and its downward movement after reaching the position, the sealing and opening of the accommodating pool are realized, ensuring the sealing performance under the vacuum pumping state. Through vacuum pumping, the bubbles on the surface of the workpiece and in the liquid fully expand and escape, making it easier to escape from the liquid and be evacuated by the vacuum, thereby improving the wetting degree of the product surface and enhancing the surface treatment performance of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described in detail below in conjunction with the drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are only drawn for the purpose of explaining the preferred embodiments and should not be construed as limiting the scope of the present invention. In addition, unless otherwise specified, the drawings only schematically show the composition or structure of the described object and may include exaggerated displays, and the drawings are not necessarily drawn to scale.

[0026] Figure 1 Schematic diagram of a high-efficiency workpiece surface treatment device based on liquid immersion Figure 1 ;

[0027] Figure 2 Schematic diagram of a high-efficiency workpiece surface treatment device based on liquid immersion Figure 2 ;

[0028] Figure 3 Separation diagram of a high-efficiency workpiece surface treatment device based on liquid immersion Figure 1 ;

[0029] Figure 4 Exploded view of a high-efficiency workpiece surface treatment device based on liquid immersion Figure 2 ;

[0030] Figure 5 Schematic diagram of a high-efficiency workpiece surface treatment device based on liquid immersion Figure 3 ;

[0031] Figure 6 Partial schematic diagram of a high-efficiency workpiece surface treatment device based on liquid immersion Figure 1 ;

[0032] Figure 7 Partial schematic diagram of a high-efficiency workpiece surface treatment device based on liquid immersion Figure 2 ;

[0033] Figure 8Partial schematic of an efficient workpiece surface treatment device based on liquid immersion Figure 3 ;

[0034] Figure 9 Schematic diagram of the base of an efficient workpiece surface treatment device based on liquid immersion Detailed implementation mode

[0035] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are only descriptive and exemplary, and should not be construed as limiting the protection scope of the present invention.

[0036] It should be noted that: similar reference numerals represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it will not be further defined and explained in subsequent drawings.

[0037] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the invention product is usually placed during use. It is only for the convenience of describing the present invention 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 should not be construed as a limitation of the present invention. The terms "first" and "second" are only for descriptive convenience and have no other directional meaning, and should not be construed as a limitation of the present invention.

[0038] This embodiment provides an efficient workpiece surface treatment device based on liquid immersion. This device integrates a vacuum pumping host 1 and a receiving pool 2 through a frame 3, uses the movement of a sealing cover 8 to achieve the sealing and opening of the receiving pool 2, and cooperates with the vacuum pumping host 1 to achieve efficient degassing. Its structural design is ingenious, the operation process is simple, it can significantly improve the quality and efficiency of workpiece surface treatment, is applicable to various workpieces that require liquid immersion treatment, and has broad application prospects.

[0039] Specifically, as Figures 1-4 shown, an efficient workpiece surface treatment device based on liquid immersion includes a frame 3 and a vacuum pumping host 1. An upper-open receiving pool 2 is provided on one side of the frame 3, and an installation position 4 for installing the vacuum pumping host 1 is provided on the other side. A vacuum pumping port 5 and a vacuum breaking port 6 are provided on the side wall of the receiving pool 2 close to the installation position 4.

[0040] As Figures 2-4 shown, a sealing cover 8 driven by a cylinder 7 is provided on the upper side of the frame 3, and tracks 10 extending from the side of the installation position 4 to the side of the receiving pool 2 are provided on both side walls of the frame 3.

[0041] As Figures 2-6As shown in the figure, the track 10 includes a bottom track 11 and side tracks 12. Wheel assemblies 20 are provided on both sides of the closing cover 8. The wheel assembly 20 includes a vertical wheel 21 and a horizontal wheel 22. The vertical wheel 21 rolls along the bottom track 11, and the horizontal wheel 22 rolls along the side track 12, so that the closing cover 8 moves between the installation position 4 and the receiving tank 2. The cooperation between the track 10 and the wheel assembly 20 enables the closing cover 8 to move smoothly and stably on the frame 3, ensuring the reliability and durability of the entire device. This design not only improves the operation convenience, but also extends the service life of the equipment and reduces the maintenance cost.

[0042] As Figures 2-7 shown, the bottom track 11 is provided with a recessed groove 13. When the closing cover 8 moves to the side of the receiving tank 2, the vertical wheel 21 enters the recessed groove 13 to lower the position of the closing cover 8 and squeeze the sealing ring (not shown in the figure) on the upper edge of the receiving tank 2, thereby closing the receiving tank 2. The vacuum pumping main machine 1 performs vacuum degassing on the inside of the receiving tank 2 through the vacuum pumping port 5.

[0043] During operation, the workpiece to be processed is placed in the receiving tank 2, the surface treatment liquid is added, and then the closing cover 8 is closed so that the receiving tank 2 is in a sealed state. In this state, the vacuum pumping main machine 1 is started, and the air in the receiving tank 2 is gradually pumped out through the pipeline, so that the air pressure in the container is gradually reduced. Generally, the vacuum degree needs to be controlled within a certain range, such as about -0.095 MPa. After reaching the set vacuum degree, maintain this vacuum state for a period of time to allow the bubbles on the surface of the workpiece and in the liquid to fully expand and escape, so that they are more likely to escape from the liquid and be evacuated by vacuum, thereby improving the wetting degree of the product surface and improving the surface treatment performance of the product. The specific time depends on the characteristics of the workpiece and the properties of the liquid, and is usually from a few minutes to dozens of minutes.

[0044] After degassing is completed, slowly open the intake valve of the vacuum breaking port 6 to allow air to gradually enter the receiving tank 2, so that the air pressure in the receiving tank 2 returns to the normal pressure state, avoiding the generation of new bubbles in the liquid due to sudden changes in air pressure. After the air pressure in the closed receiving tank 2 is stable, open the closing cover 8 and carefully take out the degassed workpiece to check the degassing effect.

[0045] In this processing equipment, the bottom track 11 and the side tracks 12 cooperate with the vertical wheel 21 and the horizontal wheel 22 respectively to enable the closing cover 8 to move smoothly on the frame 3. The cooperation between the side track 12 and the horizontal wheel 22 prevents the closing cover 8 from tilting, plays a guiding and assisting role, and determines the precise position of the closing cover 8, which is beneficial to the sealing performance of the closing cover 8 closing the receiving tank 2 in the final vacuum state.

[0046] In this embodiment, when the closing cover 8 moves, the bottom thereof moves away from the sealing ring (not shown in the figure), ensuring that the closing cover 8 moves with low friction and avoiding the wear of the sealing ring (not shown in the figure). After reaching the position, it uses its own downward movement to press the sealing ring (not shown in the figure) with its gravity, ensuring the sealing performance in the vacuum state, thereby improving the vacuum degassing effect. This design avoids the bubble residue caused by poor sealing, ensuring the uniformity and consistency of the workpiece surface treatment.

[0047] As Figure 1 、 6 shown, a circumferential groove 14 is provided at the upper edge of the receiving pool 2, and the sealing ring (not shown in the figure) is arranged in the circumferential groove 14.

[0048] As Figure 6 、 7 shown, the vertical wheel 21 is arranged on the closing cover 8 through the first wheel bracket 23, and the horizontal wheel 22 is arranged on the closing cover 8 through the second wheel bracket 24.

[0049] As Figure 5 shown, a vacuum gauge 15 and a liquid level sensor 16 are provided on one side of the receiving pool 2. The vacuum gauge 15 is used to detect the vacuum degree in the receiving pool 2 closed by the closing cover 8, and the liquid level sensor 16 is used to sense the liquid level, avoiding the influence of too little liquid on the surface treatment effect and also avoiding the liquid overflow phenomenon during the vacuum pumping process. This design enables the operator to monitor the vacuum degree and liquid level height in the receiving pool 2 in real time, not only improving the treatment effect but also ensuring the stability and safety of the entire treatment process.

[0050] As Figure 8 、 9 shown, a base 18 connected to the piston rod 17 of the air cylinder 7 is provided above the closing cover 8. The base 18 is provided with a U-shaped groove 19. A limit head 30 is provided at the end of the piston rod 17. The limit head 30 is provided with a first limit wall 31 and a second limit wall 32. A ring-shaped limit depression 33 is provided between the first limit wall 31 and the second limit wall 32. The limit head 30 passes through the U-shaped groove 19 of the base 18. The first limit wall 31 and the second limit wall 32 are respectively located on both sides of the base 18, and the ring-shaped limit depression 33 is located in the U-shaped groove 19 and can move up and down in the U-shaped groove 19, thereby ensuring that the pushing of the piston rod 17 of the air cylinder 7 on the closing cover 8 is adaptively adjusted according to the height position of the closing cover 8.

[0051] As Figure 8 、 9 shown, a U-shaped depression area 26 surrounding the U-shaped groove 19 is provided on the side of the base 18 away from the piston rod 17. The first limit wall 31 is located in the U-shaped depression area 26. This design stabilizes the positioning of the piston rod 17 and the closing cover 8, making the pushing of the closing cover 8 more stable.

[0052] As shown Figures 1-5 In the figure, an installation beam 25 is provided on the frame 3 where the accommodation pool 2 and the installation position 4 meet. The installation beam 25 straddles both side walls of the frame 3 and is located above the closing cover 8. The body of the air cylinder 7 is fixed under the installation beam 25. The closing cover 8 can pass under the installation beam 25 and move between the accommodation pool 2 and the installation position 4.

[0053] As shown Figures 1-5 In the figure, there is also a protective cover 27 above the closing cover 8 on the side of the installation position 4 of the frame 3. The closing cover 8 moves under the protective cover 27. Both sides of the protective cover 27 extend to both side walls of the frame 3, one end extends to the end wall of the frame 3, and the other end is docked with the installation beam 25. The height of the upper surface of the protective cover 27 is flush with the upper surface of the installation beam 25. The air cylinder 7, the closing cover 8, and the track 10 on the side of the installation position 4 are all shielded under the protective cover 27, playing a role in decoration, protection, dust prevention, and dirt prevention, extending the service life of the equipment, reducing the maintenance cost, and improving the reliability and durability of the equipment.

[0054] As shown Figures 1-5 In the figure, grating sensors 28 are provided on both side walls of the frame 3 on the side of the accommodation pool 2. The grating sensors 28 detect the displacement of the closing cover 8 and foreign objects in the sensing area. When the grating of the grating sensor 28 continuously detects a signal, it can be judged that the closing cover 8 is in a moving state, and the displacement position of the closing cover 8 can be checked according to the grating induction. If the grating detection signal of the grating sensor 28 is discontinuous, it can be judged that there is foreign object intrusion, such as the hand of the operator being in an unsafe position, the workpiece position in the accommodation pool 2 exceeding the upper limit, etc.

[0055] As shown Figures 1-5 In the figure, the equipment includes a controller. The vacuum pumping main machine 1, the air cylinder 7, and the grating sensors 28 are signal-connected to the controller. There are two toggle switches 29 on one side of the frame 3, and there is a certain distance between the two toggle switches 29. When the two toggle switches 29 are toggled simultaneously, the controller controls the air cylinder 7 to move so that the closing door moves towards the accommodation pool 2 side. When the grating sensor 28 senses that the closing door closes the accommodation pool 2 and conducts the signal to the controller, the controller sends an instruction to the vacuum pumping main machine 1 to start the vacuum pumping operation.

[0056] When the grating sensor 28 senses that there is a foreign object in the moving path of the closing door, the grating sensor 28 conducts the signal to the controller, and the controller sends an instruction to the air cylinder 7, and the air cylinder 7 stops running.

[0057] As shown Figure 2 、 7As shown, a wheel assembly 20 is provided at each of the four corners of the closed cover 8. Each wheel assembly 20 includes a vertical wheel 21 and a horizontal wheel 22. In the same wheel assembly 20, the vertical wheel 21 is located on the side closer to the receiving pool 2 relative to the horizontal wheel 22, and there is a gap between the bottom of the horizontal wheel 22 and the upper surface of the bottom rail 11.

[0058] As Figure 2 , 4 , as shown in FIGS. 6, three recessed grooves 13 are provided on the bottom rail 11 on each side: a front recessed groove 131, a middle recessed groove 132, and a rear recessed groove 133. The front recessed groove 131 is located at the end of the bottom rail 11 on the side of the receiving pool 2, the middle recessed groove 132 is located at a position close to the side of the receiving pool 2 on the mounting position 4 side, and the rear recessed groove 133 is located at the end of the bottom rail 11 on the mounting position 4 side.

[0059] When the vertical wheels 21 of the closed cover 8 are respectively located in the front recessed groove 131 and the middle recessed groove 132, the closed cover 8 closes the receiving pool 2. When the vertical wheels 21 of the closed cover 8 are respectively located in the middle recessed groove 132 and the rear recessed groove 133, the closed cover 8 closes the upper part of the mounting position 4.

[0060] As Figures 1-4 As shown, it further includes an oil-water separator 41 and a gas-water separator 42 which are located on one side of the frame 3 and are connected to each other through pipelines. The upstream of the oil-water separator 41 is connected to the receiving pool 2, and the downstream of the gas-water separator 42 is connected to the vacuum pumping main unit 1. The settings of the oil-water separator 41 and the gas-water separator 42 can effectively remove the oil mist and water vapor generated during the vacuum pumping process, protect the performance of the vacuum pumping main unit 1, and extend its service life. This design not only improves the operation efficiency of the equipment but also reduces the maintenance cost.

[0061] An efficient workpiece surface treatment device based on liquid immersion provided by the present invention has been introduced. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the present invention and its core idea. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and modifications can still be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. An efficient workpiece surface treatment device based on liquid immersion, characterized in that: It comprises a frame and a vacuum mainframe; one side of the frame is provided with a holding pool with an upper opening and the other side is provided with a mounting position for placing the vacuum mainframe; the side wall of the holding pool close to the mounting position is provided with a vacuum port and a vacuum breaking port; A closed cover driven by a cylinder is provided on the upper side of the frame, and tracks extending from the mounting position to the receiving pool are provided on both side walls of the frame, the tracks include a bottom track and a side track, and wheel assemblies are provided on both sides of the closed cover, the wheel assemblies include vertical wheels and horizontal wheels; the vertical wheels roll along the bottom track, and the horizontal wheels roll along the side track, so that the closed cover moves between the mounting position and the receiving pool; The bottom rail is provided with a recessed groove, and when the closing cover moves to the side of the receiving pool, the vertical wheel enters the recessed groove to move the closing cover downward and squeeze the sealing ring on the upper edge of the receiving pool to close the receiving pool; The vacuum host performs a vacuum operation on the containing pool through the vacuum port.

2. The high-efficiency workpiece surface treatment device based on liquid immersion according to claim 1 is characterized in that: A base connected to the piston rod of the cylinder is provided above the closing cover, the base is provided with a U-shaped groove, a limit head is provided at the end of the piston rod, the limit head is provided with a first limit wall and a second limit wall, an annular limit recess is provided between the first limit wall and the second limit wall; the limit head passes through the U-shaped groove of the base, the first limit wall and the second limit wall are respectively located on both sides of the base, and the annular limit recess is located in the U-shaped groove and can move up and down in the U-shaped groove.

3. The high-efficiency workpiece surface treatment device based on liquid immersion according to claim 2 is characterized in that: A U-shaped recessed area surrounding the U-shaped groove is provided on one side of the base away from the piston rod, and the first limiting wall is located in the U-shaped recessed area.

4. The high-efficiency workpiece surface treatment device based on liquid immersion according to claim 1 is characterized in that: Both side walls of the frame on the side of the containing pool are provided with grating sensors, and the grating sensors detect the displacement of the closing cover and foreign objects in the sensing area.

5. The high-efficiency workpiece surface treatment device based on liquid immersion according to claim 1, characterized in that: The installation position side also has a protective cover located above the closing cover, and the closing cover moves below the protective cover.

6. The high-efficiency workpiece surface treatment device based on liquid immersion according to claim 1, characterized in that: A wheel assembly is provided at each of the four corners of the closure cover, and each wheel assembly includes a vertical wheel and a horizontal wheel. The vertical wheel in the same wheel assembly is located on the side close to the containing pool relative to the horizontal wheel, and the bottom of the horizontal wheel has a spacing distance from the upper surface of the bottom rail.

7. The high-efficiency workpiece surface treatment device based on liquid immersion according to claim 6, characterized in that: The bottom rail on each side is provided with three recessed grooves: a front recessed groove, a middle recessed groove and a rear recessed groove; the front recessed groove is located at the end of the receiving pool side of the bottom rail, the middle recessed groove is located at a position close to the receiving pool side on the installation position side, and the rear recessed groove is located at the end of the installation position side of the bottom rail; When the vertical wheels of the closing cover are respectively located in the front recessed groove and the middle recessed groove, the closing cover closes the containing pool; When the vertical wheels of the closing cover are respectively located in the middle recessed groove and the rear recessed groove, the closing cover closes the upper part of the installation position.

8. The high-efficiency workpiece surface treatment device based on liquid immersion according to claim 1, characterized in that: It also includes an oil-water separator and an air-water separator located on one side of the frame and interconnected through pipelines. The upstream of the oil-water separator is connected to the containing tank, and the downstream of the air-water separator is connected to the vacuum main unit.

9. The high-efficiency workpiece surface treatment device based on liquid immersion according to claim 4, characterized in that: It includes a controller, and the vacuum main unit, cylinder and grating sensor are connected to the controller signal; Two toggle switches are arranged on one side of the frame, and the two toggle switches are spaced a distance apart.

10. The high-efficiency workpiece surface treatment device based on liquid immersion according to claim 1, characterized in that: When the two toggle switches are toggled at the same time, the controller controls the cylinder to move so that the closed door moves toward the side of the holding pool; the grating sensor senses that the closed door closes the holding pool and transmits the signal to the controller, and the controller sends an instruction to the vacuum main unit to start the vacuum operation; The photoelectric grating sensor senses the presence of foreign matter on the moving path of the closed door, and the photoelectric grating sensor transmits a signal to the controller, and the controller sends a command to the cylinder, and the cylinder stops running.

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