Electrochemical rust removal equipment for stainless steel parts

Abstract

The utility model provides electrochemical rust removal equipment for stainless steel parts. The electrochemical rust removal equipment comprises a cleaning gun, a movable working box, a cathode plate and an anode plate, the cleaning gun is provided with a gun body, a control switch and a brush head; power supply equipment, a three-way valve, a liquid pump, an electrolyte storage barrel and a pure water storage barrel are arranged in the movable working box, and a liquid path and current are managed through a control switch. And the two-stage switch firstly starts electrolyte to perform electrochemical rust removal and then switches to pure water to wash residues, so that thorough cleaning of a welding seam is realized. On one hand, a user can conveniently and directly operate the brush head to brush the stainless steel surface to be derusted, and weld joints are cleaned; and on the other hand, pure water can be seamlessly switched, the stainless steel surface weld joint obtained after scrubbing is completed is flushed, impurities left on the surface of the stainless steel surface are flushed away, and the weld joint can be thoroughly cleaned conveniently.

Description

Technical Field

[0001] This utility model relates to the technical field of electrochemical rust removal equipment, and in particular to an electrochemical rust removal equipment for stainless steel parts. Background Technology

[0002] During the arc welding process of stainless steel, a thick oxide scale inevitably forms on the surface of the weld area. Simultaneously, the weld area may also experience localized defects, increased inclusions, alloy composition deterioration, and changes in microstructure. The welding process itself may also induce various structural defects and residual internal stresses. These factors increase the risk of localized corrosion and may even lead to severe, sudden corrosion accidents. Traditional surface treatment methods, such as mechanical and chemical rust removal, are not ideal for stainless steel weld areas, failing to effectively remove oxide scale and completely eliminate surface defects and inclusions.

[0003] To address the aforementioned problems, existing technologies have proposed a cleaning method using a cleaning gun. This method involves fixing the cathode to the surface of the workpiece to be cleaned and connecting the anode to the brush head of the cleaning gun, using an electrolyte solution to clean the stainless steel welds. However, this method is not only cumbersome and time-consuming, but also requires additional rinsing of the welds with clean water after brushing, increasing the complexity and workload of the process.

[0004] Therefore, there is a need to develop a more efficient, simple, and thorough cleaning technology to remove oxide scale and surface defects from weld areas, so as to improve the quality and corrosion resistance of stainless steel welds, while reducing operation time and costs.

[0005] In view of this, the inventor has specifically designed an electrochemical rust removal device for stainless steel parts, which leads to this invention. Summary of the Invention

[0006] To solve the above problems, the technical solution of this utility model is as follows:

[0007] An electrochemical rust removal device for stainless steel parts, comprising:

[0008] A cleaning gun, including the gun body, control switch, and brush head;

[0009] The mobile work box contains a power supply device, a three-way valve, a liquid pump, an electrolyte storage tank, and a pure water storage tank. The control switch is electrically connected to the three-way valve, the power supply device, and the liquid pump, and is used to control the liquid pump and the three-way valve to draw electrolyte or pure water from the electrolyte storage tank or the pure water storage tank to the brush head of the cleaning gun.

[0010] The cathode plate is electrically connected to the power supply equipment and led out along the movable work box. It is used to receive rust-removing metal parts and serves as the cathode of the dual-electrode system.

[0011] The anode plate, electrically connected to the power supply equipment and led out along the movable working box to the brush head position of the cleaning gun, is used to mix the electrolyte and serves as the anode of the dual-electrode system to cooperate with the cathode.

[0012] in:

[0013] The control switch is a two-stage switch. The initial stage switch is used to control the three-way valve to switch to the liquid circuit of the electrolyte storage tank and drive the power supply equipment to generate the working current of the dual-electrode system. The second stage switch is used to control the three-way valve to switch to the liquid circuit of the pure water storage tank and to disconnect the power supply equipment from the dual-electrode system.

[0014] Preferably, it also includes a control board, the output of which is electrically connected to a three-way valve, a liquid pump, and a power supply device.

[0015] Preferably, the control board is an STM32 circuit board or an MCU microprocessor.

[0016] Preferably, the three-way valve is a three-way solenoid valve.

[0017] Preferably, the liquid pump is a miniature water pump and is connected in the liquid path between the three-way valve and the cleaning gun.

[0018] Preferably, the gun body is cylindrical and has a receiving cavity extending through its inner side along its axial direction. One end of the receiving cavity is locked and sealed by a sealing plate. A conductive cable and an infusion tube are led out from the side wall of the movable working box. Both the conductive cable and the infusion tube pass through the receiving cavity along the sealing plate.

[0019] Preferably, the other end of the accommodating cavity is provided with a connecting screw, the brush head includes a connecting shaft and a bristle structure fixed to one end of the connecting shaft, the other end of the connecting shaft is provided with a connecting end that is threaded into the connecting screw, and the connecting shaft passes through it along its axial direction to form a liquid flow channel.

[0020] Preferably, the side of the connecting shaft away from the connecting end is provided with a flow equalization cover that seals the liquid flow channel, and the end face of the flow equalization cover is provided with a plurality of flow equalization holes, and the bristle structure is distributed around the periphery of the flow equalization cover.

[0021] Preferably, the bristle structure includes a plurality of linear fixed areas evenly distributed around the periphery of the flow equalization cover, bristle clusters disposed within the fixed areas, and conductive brushes disposed between adjacent fixed areas.

[0022] Preferably, the gun body and the connecting shaft are both covered with insulating protective sleeves.

[0023] The beneficial effects of this utility model are as follows:

[0024] This invention uses a two-stage switch to control the switching between electrolyte and pure water. On the one hand, the initial switch enables the supply of electrolyte and the conduction of the dual-electrode system, allowing users to directly operate the brush head to scrub the stainless steel surface to be derusted and clean the welds. On the other hand, the two-stage switch allows for seamless switching to pure water to rinse the stainless steel surface welds after scrubbing, removing any residual impurities and facilitating thorough cleaning of the welds. Attached Figure Description

[0025] The accompanying drawings, which are provided to further illustrate the present invention and constitute a part of the present invention, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.

[0026] in:

[0027] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0028] Figure 2 This is a wiring diagram highlighting the connection of the cleaning gun to the liquid circuit in this utility model;

[0029] Figure 3 This is a schematic diagram showing a partial explosion of the cleaning gun in this utility model;

[0030] Figure 4 This is a partial cross-sectional view of the cleaning gun in this utility model;

[0031] Figure 5 This is a partial cross-sectional view of the control switch in this utility model;

[0032] Figure 6 This is a partial structural diagram highlighting the end face of the connecting shaft in this utility model;

[0033] Figure 7 This is a block diagram illustrating the connection principle of this utility model.

[0034] Label Explanation:

[0035] 10. Cleaning gun; 20. Mobile work box; 21. Conductive cable; 211. Branch line; 22. Infusion tube; 23. Power supply equipment; 24. Three-way valve; 25. Liquid pump; 26. Electrolyte storage tank; 27. Pure water storage tank; 28. Control board; 30. Cathode plate; 40. Anode plate; 50. Gun body; 51. Receptacle; 52. Sealing plate; 53. Connecting screw; 60. Control switch; 61. Mounting shell; 62. Control button; 63. Trigger button; 70. Brush head; 71. Connecting shaft; 711. Connecting end; 72. Brush bristle structure; 721. Fixing area; 722. Brush bristle tuft; 723. Conductive brush; 73. Liquid flow channel; 74. Flow equalization cover; 741. Flow equalization hole; 742. Mounting area; 75. Filling area; 80. Insulating protective sleeve. Detailed Implementation

[0036] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0037] Please see Figures 1 to 7 This is a preferred embodiment of an electrochemical rust removal device for stainless steel parts, comprising a cleaning gun 10, a movable working box 20, a cathode plate 30, and an anode plate 40, wherein:

[0038] like Figure 3 , 4 As shown, the cleaning gun 10 includes a gun body 50, a control switch 60, and a brush head 70, specifically:

[0039] In this embodiment, the gun body 50 is cylindrical in shape and a receiving cavity 51 is provided through the inner side of the gun body 50 along its axial direction. One end of the receiving cavity 51 is fastened to the side wall of the receiving cavity 51 by a sealing plate 52 to lock and seal the opening of the receiving cavity 51. A conductive cable 21 and an infusion tube 22 are led out from the side wall of the movable working box 20. Both the conductive cable 21 and the infusion tube 22 pass through the receiving cavity 51 along the sealing plate 52.

[0040] The control switch 60 is fixed to the mounting housing 61 on the outer periphery of the gun body 50 by a snap-fit ​​connection. The control switch 60 includes a control button 62 and a trigger button 63. Figure 5 The control button 62 is pivotally connected to the front end of the mounting housing 61, and a torsion spring (not shown in the figure) is provided for pressing and resetting the control button 62. The trigger button 63 is hidden below the control button 62. When the control button 62 is rotated downwards to contact the trigger button 63, the control switch 60 is activated and produces the corresponding control effect.

[0041] The other end of the accommodating cavity 51 is provided with a connecting screw 53. The brush head 70 includes a connecting shaft 71 and a bristle structure 72 fixed to one end of the connecting shaft 71. The other end of the connecting shaft 71 is provided with a connecting end 711 that is threaded into the connecting screw 53. The connecting shaft 71 passes through along its axial direction to form a liquid flow channel 73.

[0042] like Figure 1 , 7 As shown, the mobile work box 20 is equipped with a power supply device 23, a three-way valve 24, a liquid pump 25, an electrolyte storage tank 26, and a pure water storage tank 27. The control switch 60 is electrically connected to the three-way valve 24, the power supply device 23, and the liquid pump 25, and is used to control the liquid pump 25 and the three-way valve 24 to draw electrolyte or pure water from the electrolyte storage tank 26 or the pure water storage tank 27 to the brush head 70 of the cleaning gun 10.

[0043] Among them, the power supply device 23 is a lithium battery, which forms two output sides with opposite polarities. It is connected to the anode plate 40 and the cathode plate 30 respectively through two conductive cables 21, which serve as the basis for current generation of the dual electrode system. After being powered on, when the anode plate 40 and the cathode plate 30 come into contact with the same electrolyte at the same time, a dense and chemically stable chemical superpassivation film can be efficiently formed on the stainless steel surface. At the same time, it can eliminate surface defects, improve the uniformity of stainless steel, and greatly improve the resistance of stainless steel to local corrosion.

[0044] In order to achieve contact between the anode plate 40 and the electrolyte, it is inserted into the accommodating cavity 51 through the sealing plate 52 at one end of the gun body 50, and then passes through the liquid flow channel 73 inside the connecting shaft 71 along the accommodating cavity 51 to enter the end of the brush head 70. When the electrolyte flows out of the brush head 70 along the liquid flow channel 73, it comes into contact with the anode plate 40. When the electrolyte flows out to the surface of the stainless steel part, the cathode becomes connected to the anode.

[0045] In addition, in order to facilitate the control of the control switch 60 and maintain the sealing of the accommodating cavity 51, a branch line 211 is branched off from the conductive cable 21 before entering the accommodating cavity 51, which is used to connect to the control switch 60, thereby transmitting the control signal of the control switch 60.

[0046] The cathode plate 30 is electrically connected to the power supply device 23 and extends along the movable work box 20. It is used to receive the rust-removing metal parts and serves as the cathode of the dual-electrode system. The anode plate 40 is electrically connected to the power supply device 23 and extends along the movable work box 20 to the brush head 70 of the cleaning gun 10. It is used to mix the electrolyte and serves as the anode of the dual-electrode system to cooperate with the cathode.

[0047] in:

[0048] The control switch 60 is a two-stage switch. Its initial stage is used to control the three-way valve 24 to switch to the liquid circuit of the electrolyte storage tank 26 and drive the power supply device 23 to generate the working current of the dual-electrode system. Its second stage is used to control the three-way valve 24 to switch to the liquid circuit of the pure water storage tank 27 and to disconnect the power supply device 23 from the current of the dual-electrode system.

[0049] To better control the electrochemical rust removal equipment, this embodiment also includes a control board 28, the output of which is electrically connected to a three-way valve 24, a liquid pump 25, and a power supply device 23.

[0050] In this embodiment, the control board 28 is an STM32 circuit board or an MCU microprocessor. In this embodiment, it is preferably an MCU microprocessor and is set in a corresponding area inside the mobile work box 20. It is electrically connected to each part through conductive cables 21, i.e., corresponding wires.

[0051] Preferred, such as Figure 2 As shown, the three-way valve 24 is a three-way solenoid valve. The two input terminals of the three-way solenoid valve are connected to the electrolyte storage tank 26 and the pure water storage tank 27, respectively. The output terminal of the three-way solenoid valve is connected to the accommodating cavity 51 through a water pump. After receiving the control signal from the control board 28, the three-way solenoid valve switches between two states: the accommodating cavity 51 is connected to the electrolyte storage tank 26 and the accommodating cavity 51 is connected to the pure water storage tank 27, thereby realizing the supply of electrolyte and the supply of pure water, respectively.

[0052] Preferred, such as Figure 2 As shown, the liquid pump 25 is a miniature water pump and is connected to the liquid circuit between the three-way valve 24 and the cleaning gun 10. In this embodiment, the specific model of the miniature water pump is the AM370HPW (miniature liquid pump 25) water pump produced by Dongguan Zongzhi Electronic Technology Co., Ltd.

[0053] Preferred, such as Figure 4 , 6 As shown, a flow equalization cover 74 with a sealed liquid flow channel 73 is provided on the side of the connecting shaft 71 away from the connecting end 711. Several flow equalization holes 741 are opened through the end face of the flow equalization cover 74, and the bristle structure 72 is distributed around the periphery of the flow equalization cover 74.

[0054] In this embodiment, the flow equalization cover 74 is disc-shaped, and the end of the connecting shaft 71 is recessed inward to form an installation area 742 that is adapted to the flow equalization cover 74. The flow equalization cover 74 and the side wall of the installation area 742 are sealed together by a threaded structure and a sealing ring (not shown in the figure). A flow equalization hole 741 is opened through the flow equalization cover 74 so that the liquid flowing out of the liquid channel 73 can flow evenly from the end of the brush head 70 to the position of the brush bristle structure 72, and the brush bristle structure 72 can be used to evenly coat the stainless steel surface.

[0055] Furthermore, the liquid flow channel 73 forms an enlarged filling area 75 at one end near the brush structure 72. The filling area 75 is in direct contact with the flow equalization cover 74. The wires and cables extend along the liquid flow channel 73 to the filling area 75, and the anode plate 40 is exposed in the filling area 75. Thus, when the electrolyte flows to the filling area 75, it contacts the anode plate 40 and then flows out along the flow equalization hole 741. Together with the cathode plate 30, a conductive area is formed on the coating area of ​​the stainless steel surface. This efficiently forms a thick, dense, and chemically stable chemical superpassivation film on the stainless steel surface, while eliminating surface defects, improving the uniformity of the stainless steel, and significantly improving the stainless steel's resistance to localized corrosion.

[0056] Preferred, such as Figure 6 As shown, the bristle structure 72 includes a plurality of linear fixing areas 721 evenly distributed around the periphery of the flow equalization cover 74, bristle clusters 722 disposed in the fixing areas 721, and conductive brushes 723 disposed between adjacent fixing areas 721.

[0057] In this embodiment, 24 fixed areas 721 are evenly arranged around the current equalization cover 74. Nylon bristles are evenly implanted in each fixed area 721 to form a uniform and dense bristle cluster 722. A conductive brush 723 is arranged between adjacent fixed areas 721 and every two fixed areas 721. In this embodiment, copper wire conductive brushes 723 are used. Thus, the copper wire conductive brushes 723 can work with the electrolyte to conduct the current generated by the anode plate 40 to the stainless steel surface, forming a current loop with the cathode plate 30, which facilitates the chemical superpassivation treatment of impurities on the weld.

[0058] Preferred, such as Figure 4 As shown, the gun body 50 and the connecting shaft 71 are both covered with insulating protective sleeves 80. In this embodiment, the insulating protective sleeves 80 are silicone sleeves, and the insulating protective sleeves 80 on the outside of the gun body 50 are double-layered. The mounting shell 61 is also made of plastic material, so as to minimize leakage.

[0059] In particular, combined Figure 7 In this embodiment, the control switch 60 is a two-stage push-button switch. After an initial press, the initial stage switch is triggered, connecting the first circuit. After a deeper press, the second stage switch is triggered, connecting the second circuit.

[0060] After the user initially presses the trigger switch, the first circuit is activated, the three-way solenoid valve switches to the liquid path connected to the electrolyte storage tank 26, the liquid pump 25 operates, drawing the electrolyte into the cleaning gun 10, and the power supply device 23 discharges, forming a conductive circuit through the cathode plate 30 and the anode plate 40 in conjunction with the electrolyte, which facilitates the chemical super-passivation cleaning of the stainless steel surface.

[0061] After the user presses the pressure deeply, the two-stage switch is triggered, the second circuit is turned on, the power supply equipment 23 is taken offline, the three-way solenoid valve switches to the liquid circuit connected to the pure water storage tank 27, the liquid pump 25 continues to work, and draws pure water into the cleaning gun 10 to thoroughly rinse the stainless steel surface that has been chemically passivated.

[0062] The beneficial effects of this utility model are as follows:

[0063] This invention uses a two-stage switch to control the switching between electrolyte and pure water. On the one hand, the initial switch enables the supply of electrolyte and the conduction of the dual-electrode system, allowing users to directly operate the brush head 70 to brush the stainless steel surface to be derusted and clean the welds. On the other hand, the two-stage switch allows for seamless switching to pure water to rinse the stainless steel surface welds after brushing, removing any residual impurities and facilitating thorough cleaning of the welds.

[0064] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. An electrochemical rust removal device for stainless steel parts, characterized in that, include: The cleaning gun (10) includes a gun body (50), a control switch (60), and a brush head (70). The mobile work box (20) is equipped with a power supply device (23), a three-way valve (24), a liquid pump (25), an electrolyte storage tank (26), and a pure water storage tank (27). The control switch (60) is electrically connected to the three-way valve (24), the power supply device (23), and the liquid pump (25) to control the liquid pump (25) and the three-way valve (24) to draw electrolyte or pure water from the electrolyte storage tank (26) or the pure water storage tank (27) to the brush head (70) of the cleaning gun (10). The cathode plate (30) is electrically connected to the power supply equipment (23) and led out along the movable work box (20) to support the rust-removing metal parts and serve as the cathode of the dual-electrode system; The anode plate (40) is electrically connected to the power supply device (23) and led out along the movable work box (20) to the brush head (70) of the cleaning gun (10), used to mix the electrolyte and serve as the anode of the dual electrode system to cooperate with the cathode; in: The control switch (60) is a two-stage switch. Its initial stage is used to control the three-way valve (24) to switch to the liquid circuit of the electrolyte storage tank (26) and drive the power supply device (23) to generate the working current of the dual-electrode system. Its second stage is used to control the three-way valve (24) to switch to the liquid circuit of the pure water storage tank (27) and the offline power supply device (23) to cut off the current of the dual-electrode system.

2. The electrochemical rust removal equipment for stainless steel parts according to claim 1, characterized in that, It also includes a control board (28), the output of which is electrically connected to a three-way valve (24), a liquid pump (25), and a power supply device (23).

3. The electrochemical rust removal equipment for stainless steel parts according to claim 2, characterized in that, The control board (28) is an STM32 circuit board or an MCU microprocessor.

4. The electrochemical rust removal equipment for stainless steel parts according to claim 2, characterized in that, The three-way valve (24) is a three-way solenoid valve.

5. The electrochemical rust removal equipment for stainless steel parts according to claim 1, characterized in that, The liquid pump (25) is a miniature water pump and is connected to the liquid path between the three-way valve (24) and the cleaning gun (10).

6. The electrochemical rust removal equipment for stainless steel parts according to claim 1, characterized in that, The gun body (50) is cylindrical and has a accommodating cavity (51) extending through its inner side along its axial direction. One end of the accommodating cavity (51) is locked and sealed by a sealing plate (52). A conductive cable (21) and an infusion tube (22) are led out from the side wall of the movable work box (20). Both the conductive cable (21) and the infusion tube (22) are inserted into the accommodating cavity (51) along the sealing plate (52).

7. The electrochemical rust removal equipment for stainless steel parts according to claim 6, characterized in that, The other end of the accommodating cavity (51) is provided with a connecting screw (53). The brush head (70) includes a connecting shaft (71) and a bristle structure (72) fixed to one end of the connecting shaft (71). The other end of the connecting shaft (71) is provided with a connecting end (711) that is threaded into the connecting screw (53). The connecting shaft (71) passes through along its axial direction to form a liquid flow channel (73).

8. The electrochemical rust removal equipment for stainless steel parts according to claim 7, characterized in that, The connecting shaft (71) has a flow equalization cover (74) with a sealed liquid flow channel (73) on the side away from the connecting end (711). The end face of the flow equalization cover (74) has several flow equalization holes (741) through it. The bristle structure (72) is distributed around the periphery of the flow equalization cover (74).

9. The electrochemical rust removal equipment for stainless steel parts according to claim 8, characterized in that, The bristle structure (72) includes a plurality of linear fixed areas (721) evenly distributed around the periphery of the flow equalization cover (74), bristle clusters (722) disposed in the fixed areas (721), and conductive brushes (723) disposed between adjacent fixed areas (721).

10. The electrochemical rust removal equipment for stainless steel parts according to claim 7, characterized in that, The gun body (50) and the connecting shaft (71) are both covered with insulating protective sleeves (80).

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