Electrolytic polishing device for nuclear power product

Abstract

The utility model relates to the technical field of electropolishing equipment, in particular to a nuclear power product electrolytic polishing device which comprises a device body, the device body comprises a liquid supply assembly, a machining assembly and a power source, the machining assembly is connected with the liquid supply assembly and the negative electrode of the power source, and a workpiece is connected with the positive electrode of the power source. The processing assembly comprises a brush head, the brush head is provided with an inner cavity and liquid outlet holes, and the liquid outlet holes are densely distributed in the surface of one side of the brush head and communicate with the inner cavity of the brush head; an inner cavity of the brush head is connected with a liquid supply assembly; a liquid storage layer is arranged on the surface of the side, provided with the liquid outlet holes, of the brush head and covers the liquid outlet holes. The nuclear power evaporator surface treatment device can achieve the effect of conveniently and rapidly conducting surface treatment on a nuclear power evaporator, the brush head structure capable of being held by a human hand can stretch into the evaporator to conduct fixed-point and fixed-area treatment, various treatment conditions can be flexibly handled, the recovery structure can effectively improve the utilization rate of liquid medicine, and the whole structure is compact and good in economical efficiency.

Description

TECHNICAL FIELD

[0001] The utility model relates to electro polishing equipment technical field, concretely relates to a nuclear power product electrolytic polishing device. BACKGROUND

[0002] The steam generator (abbreviation evaporator) in nuclear power equipment is generally made of stainless steel or 690 nickel base alloy, after long time operation, radioactive particles are easily accumulated in the concave marks of the rough surface, which causes high radiation risk after the residual radiation particles, and is very unfavorable for the inspection, maintenance and other operations of the equipment. Based on the limitation of the real conditions and technical level, it is currently impossible to completely eliminate the residual radioactive particles in the evaporator after operation, therefore, in the design of the evaporator, various factors must be considered to control the radiation at a reasonable, feasible and as low as possible level to reduce the irradiation dose of personnel and control the hidden danger caused thereby within the safety limit. Based on this consideration, it is very necessary to use the evaporator with smoother inner surface to reduce the unevenness of the device surface and thus reduce the accumulation of radioactive substances on the surface.

[0003] At present, the electrolytic chemical polishing process is commonly used for smooth machining treatment of the surface of stainless steel, and this kind of treatment process usually adopts the mode of immersing the machined part in the electro polishing solution for electrolytic polishing. However, the evaporator of the nuclear power equipment is not required to be electrolytically polished at all positions, for example, the internal structure of part of the evaporators is not a complete closed container structure, or the inner wall structure has a special-shaped structure or other irregular structure which does not require electro polishing treatment, and the traditional electro polishing process directly electrolytically polishes the evaporator with this structure, which has a technical obstacle that cannot be overcome temporarily; part of the evaporator design is large in size, and after shielding the positions which do not require electrolytic polishing, the evaporator is immersed in the electro polishing solution to treat the positions requiring electro polishing, which is extremely costly, and the preparation process of the previous work also consumes a lot of time, which greatly slows down the work efficiency of the whole production process. In addition, some evaporators have grooves or holes with special functions in the inner cavity, these positions generally do not require polishing treatment, and it is not easy to effectively shield these positions for electrolytic polishing treatment by immersion. UTILITARY MODEL

[0004] The utility model aims at providing a nuclear power product electrolytic polishing device to solve the above technical problems.

[0005] The technical problem solved by the utility model can be realized by the following technical scheme:

[0006] The utility model discloses an electrolytic polishing device for nuclear power product, comprising a device body, electrolytic chemical polishing treatment is carried out to the workpiece waiting for processing through the device body, wherein the device body includes liquid supply assembly, processing assembly and power supply, the processing assembly is connected with the negative pole of the liquid supply assembly and the power supply, and the workpiece is connected with the positive pole of the power supply.

[0007] The processing assembly comprises a brush head, the brush head has an inner cavity and liquid outlet holes, the liquid outlet holes are densely distributed on one side surface of the brush head and communicate with the inner cavity of the brush head.

[0008] The inner cavity of the brush head is connected with the liquid supply assembly.

[0009] One side surface of the brush head provided with the liquid outlet holes is provided with a liquid storage layer, and the liquid storage layer covers the liquid outlet holes.

[0010] In the working process of the utility model, the liquid supply assembly stores chemical liquid for electrolytic polishing treatment, the positive and negative poles of the power supply are connected with the processing assembly and the workpiece respectively, the processing assembly (chemical liquid) is set as a negative pole, the workpiece is set as a positive pole, the liquid supply assembly provides chemical liquid for the processing assembly, the working head of the processing assembly is placed on the surface of the workpiece to be treated, the liquid storage layer filled with chemical liquid is used as an intermediate medium to fill the surface of the workpiece (positive pole) and the processing assembly (negative pole), the two are isolated, the workpiece and the processing assembly are not in direct contact, and after power-on, the brush head moves on the surface of the workpiece to perform electrolytic polishing treatment on the corresponding area.

[0011] Preferably, the liquid storage layer is made of non-woven fabric or dust-free cloth.

[0012] Preferably, the liquid outlet holes on the side surface of the brush head provided with the liquid storage layer are arranged as follows: from the center area of the surface of the brush head provided with the liquid outlet holes to the outside, the diameters of the liquid outlet holes gradually increase.

[0013] Preferably, in order to make the overflow process of viscous electrolytic polishing liquid more uniform, the inner wall of one side connected with the liquid inlet in the inner cavity of the brush head is in a concave arc surface structure, so that the chemical liquid is guided to disperse when the chemical liquid is delivered into the inner cavity of the brush head, and then the chemical liquid is uniformly overflowed to the liquid storage layer.

[0014] Preferably, the liquid supply assembly comprises a liquid storage tank and a first delivery pump, the first delivery pump obtains power after being connected with the power supply, and the first delivery pump is connected with the liquid storage tank and the processing assembly through a delivery pipeline.

[0015] Preferably, the liquid supply assembly comprises a heating module, the heating module obtains power after being connected with the power supply, and the heating module is arranged in the liquid storage tank, so that the chemical liquid is controlled in temperature, and the chemical liquid is better suitable for processing conditions.

[0016] Preferably, the heating module can be selected from a stainless steel heater, a quartz heater or a Teflon heater.

[0017] Preferably, the liquid storage tank is made of corrosion-resistant material.

[0018] Preferably, the liquid supply assembly comprises a first filter barrel connected between the first delivery pump and the liquid storage tank.

[0019] Preferably, the first delivery pump is a diaphragm metering pump.

[0020] Preferably, the device body comprises a recovery assembly for recycling and recycling the residual chemical liquid after treatment; the recovery assembly is connected to the liquid supply assembly; and the workpiece is placed in the recovery assembly for electrochemical polishing treatment.

[0021] Preferably, in some embodiments, the recovery assembly comprises a liquid collecting tank, and the workpiece is placed in the liquid collecting tank for electrolytic polishing treatment; and the liquid collecting tank is connected to the liquid supply assembly.

[0022] Preferably, the recovery assembly comprises a second delivery pump for providing active delivery power when the chemical liquid is recovered, so as to cope with the situation that the liquid supply assembly cannot be flexibly arranged at a certain height.

[0023] The second delivery pump is connected to the liquid collecting tank and the liquid supply assembly.

[0024] Preferably, the recovery assembly comprises a second filter barrel connected between the second delivery pump and the liquid supply assembly.

[0025] Beneficial effects: According to the above technical scheme, the utility model can realize the effect of conveniently and quickly treating the surface of the nuclear power evaporator. The brush head structure held by hand can be inserted into the evaporator for fixed-point and fixed-area treatment, and can flexibly cope with various situations including special-shaped treatment surfaces. The recovery structure can effectively improve the utilization rate of the chemical liquid, and the overall structure is compact and economical. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 FIG. 1 is a structural schematic view of the utility model;

[0027] Figure 2 FIG. 2 is a structural schematic view of the utility model when viewed from the front;

[0028] Figure 3 FIG. 3 is a structural schematic view of the utility model when viewed from the top;

[0029] Figure 4 FIG. 4 is a structural schematic view of the utility model when viewed from the left side;

[0030] Figure 5 Fig. 2 is a structure schematic view of the utility model from the right side;

[0031] Figure 6 Fig. 3 is a function connection schematic view of the utility model;

[0032] Figure 7 Fig. 4 is a structure schematic view of the brush head of the utility model;

[0033] Figure 8 Fig. 5 is a sectional structure schematic view of the utility model; Figure 7

[0034] Figure 9 Fig. 6 is a structure schematic view of one side surface of the brush head of the utility model;

[0035] Figure 10 Fig. 7 is a sectional structure schematic view of the brush head of the utility model. DETAILED DESCRIPTION

[0036] In order to make the technical means, creative features, purposes and effects realized by the utility model easy to understand, the utility model is further described below in combination with specific drawings. It should be noted that the terms "first", "second", "third", "fourth" and the like (if any) in the specification and claims of the utility model are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" or "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a product or device including a series of components or units does not have to be limited to only those components or units clearly listed, but can include other components or units not clearly listed or inherent to these products or devices.

[0037] Referring to Figures 1 to 5 , the nuclear power product electrolytic polishing device comprises a device body, electrolytic chemical polishing treatment is carried out on the workpiece waiting for processing through the device body, wherein the device body comprises a liquid supply assembly, a processing assembly and a power supply, the processing assembly is connected to the negative pole of the liquid supply assembly and the power supply, and the workpiece is connected to the positive pole of the power supply; the processing assembly comprises a brush head, the brush head has an inner cavity and a liquid outlet hole, the liquid outlet hole is densely distributed on one side surface of the brush head and is communicated with the inner cavity of the brush head; the inner cavity of the brush head is connected to the liquid supply assembly; the one side surface of the brush head provided with the liquid outlet hole is provided with a liquid storage layer, and the liquid storage layer covers the liquid outlet hole.

[0038] As Figures 1 to 5 ​As shown, the brush head 10 is connected to the negative terminal of the power supply 1 via the cathode wire 2, and the workpiece 11 is connected to the positive terminal of the power supply 1 via the anode wire 13. The brush head 10 covers the workpiece 11. The power supply 1 is connected to the electrical control cabinet 14.

[0039] like Figure 7 , Figure 8 As shown, the brush head structure of this utility model includes a hollow main body 101 and a matching liquid supply pipe 102. A plurality of holes 1001 are formed on the inner surface of the main body 101 facing the workpiece, densely distributed on the brush head surface, so that the polishing liquid flows out and wets the outer liquid reservoir layer. The liquid reservoir layer is not shown in the figure. Meanwhile, the brush head 10 serves as an electrode, and its material can be a conductive metal, preferably a corrosion-resistant conductive metal, such as copper or other copper alloys, various stainless steels (iron), titanium or titanium alloys.

[0040] It should be noted that the workpieces to be processed by this utility model include steam generators used in nuclear power equipment (mainly referring to electrolytic polishing of uneven or irregular inner walls of the inner cavity using the brush head of this utility model).

[0041] In some preferred embodiments, the brush head is made of titanium alloy. Since the operation is a manual process, requiring the operator to hold the brush head (in which case a handle is typically attached to the outside of the brush head) for random polishing (this is generally suitable for irregular electropolishing paths, such as locations with different curvatures or structural component connections), using a lightweight titanium alloy brush head effectively reduces the workload for the operator.

[0042] In some embodiments, the liquid reservoir is made of nonwoven fabric or dust-free cloth.

[0043] During operation, the brush head does not directly contact the workpiece surface. Therefore, a reservoir layer for storing the electropolishing solution is wrapped around the workpiece-facing side of the brush head. This reservoir layer not only needs to store the solution but also needs to have certain deformation properties to effectively cover the uneven areas of the workpiece surface, eliminating blind spots. Simultaneously, its flexibility also helps protect the workpiece surface, preventing damage during frequent operation. Therefore, the reservoir layer of this invention is made of a non-conductive, porous, flexible material in a layered structure covering the brush head surface. This flexible material can be a cleanroom cloth or non-woven fabric, including cleanroom cloths or non-woven fabrics made of polyester fiber (PET), polypropylene (PP), nylon (PA), spandex (PU), acrylic fiber (PAN), polypropylene (PP), aramid fiber (ARA), natural fibers, hot air cotton, HD / PE combined fibers, PP / PE composite fibers, etc.

[0044] It should be noted that the electrode area corresponding to the brush head (liquid medicine) is generally smaller than the workpiece contact area when the workpiece is subjected to electrochemical polishing treatment, and the tip discharge phenomenon (which refers to a discharge phenomenon occurring in the sharp part of an object under the action of a strong electric field, which is a kind of corona phenomenon) is easy to form. In order to prevent the phenomenon from causing the non-woven fabric wrapped by the brush head to be burned through, thereby causing electrolysis injury to the surface of the workpiece, resulting in an increase in product defect rate, the brush head needs to be treated with edge wrapping (that is, the edges of the brush head are wrapped with non-conductive hard materials or at least the four corners are wrapped). As shown in Figure 9 It should be noted that after the four corners of the main part 101 are wrapped with the insulating wrapping layer 103, the side surface of the main part 101 where the liquid hole 1001 is provided has a certain protruding height, which is equivalent to the insulating wrapping layer 103 and the liquid storage layer together, lifting the brush head (the side surface where the liquid hole 1001 is provided) relative to the surface of the workpiece to be treated by a certain height. At the same time, due to the lifting of the gap between the electrode and the workpiece, the production advantage is that the electrochemical polishing liquid flows more smoothly, and the bubbles generated during the electrochemical polishing process are more easily removed. The wrapping (edge) material (different from the liquid storage layer material) can be selected from materials that are non-conductive and have high temperature resistance and corrosion resistance, including wood, polyimide (PI), polyphenylene sulfide (PPS), polyether ether ketone (PEEK), polybenzimidazole (PBI), polyarylsulfone (PAR), polyetherimide (PEI), polysulfone (PSU), polytetrafluoroethylene (PTFE), polycarbonate (PC), polyvinylidene fluoride (PVDF), high-temperature nylon (PPA), nylon 46, polyarylate (PAR), chlorinated polyether, POB, aminoplast, etc.

[0045] In some embodiments, the side edges of the side surface of the brush head facing the workpiece (i.e., the surface provided with the liquid hole) are chamfered, and any corner thereof is also chamfered, so that the edge or sharp part is in a smooth arc structure, reducing the tip discharge phenomenon.

[0046] In some embodiments, the liquid holes of the brush head are arranged as follows: from the center region outward, the diameters of the liquid holes increase in turn.

[0047] Specifically, as shown in Figure 9 In some embodiments, the liquid holes of the brush head are arranged as follows: from the center region outward, the diameters of the liquid holes increase in turn.

[0048] After the present example is set, the liquid medicine is more evenly distributed in the liquid storage layer of the brush head (corresponding to the corresponding uniform distribution effect on the workpiece contact surface). The diameter of the outlet hole can be set to 1 / 5-1 / 3 times. For example, if the increase is 1 / 5, the diameter of the outlet hole in the center area is A, and the diameter of the outlet hole in the outer ring is 1.2 times the diameter of A.

[0049] In some embodiments, the present application is to make the overflow process of viscous electrochemical polishing liquid more uniform, which is set as follows: as shown in the figure Figure 10 The inner wall 10102 connected to the liquid inlet in the inner cavity of the brush head is an arc-shaped concave curved surface structure, so that the liquid is guided to disperse when the liquid is transported into the inner cavity of the brush head, thereby uniformly overflowing to the liquid storage layer.

[0050] It should be noted that in some application occasions, the electrochemical polishing liquid has high viscosity, and the brush head works to make the processing effect more stable, so the liquid pumping pressure and liquid flow rate cannot be set too large, thereby ensuring that the liquid only fully wets the entire area of the liquid storage layer. Therefore, the inner wall of the inner cavity of the brush head connected to the liquid inlet can be set as an arc-shaped concave curved surface structure, so that the liquid can flow uniformly to all outlet holes in a dispersed manner after entering the inner cavity, thereby uniformly wetting the entire area of the liquid storage layer.

[0051] In some preferred embodiments, the inner wall of the inner cavity of the brush head connected to the liquid inlet is an ellipsoidal surface or a parabolic surface.

[0052] In some embodiments, as shown in the figure Figure 10 The edge of the liquid inlet 10103 in the inner cavity of the brush head is set as a chamfered structure, that is, the opening edge of the hole on the inner wall connected to the liquid pipeline on the brush head is chamfered, so that it can play a guiding role when the liquid enters the inner cavity of the brush head, thereby cooperating with the inner wall of the concave curved surface structure to make the liquid entering the inner cavity of the brush head flow to the outlet hole in a dispersed manner.

[0053] In some embodiments, the liquid supply assembly includes a liquid storage tank and a first delivery pump, and the first delivery pump is connected to a power source to obtain power; the first delivery pump is connected to the liquid storage tank and the processing assembly through a delivery pipeline.

[0054] Specifically, as shown in the figure Figures 1 to 5As shown, the inlet pipe of the first delivery pump 9 is connected to the liquid storage tank 15, and the outlet pipe 8 is connected to the brush head 10 of the processing component. For ease of operation of the processing component, the outlet pipe uses a flexible hose structure. The inner cavity of the brush head is connected to the first delivery pump 9 via a delivery hose and then to the liquid storage tank 15 to obtain the processing solution. During operation, the first delivery pump delivers the solution to the inner cavity of the brush head, allowing it to wet the liquid storage layer through the outlet hole. The solution then contacts the workpiece surface as the brush head approaches it. After energizing, the brush head moves back and forth along the workpiece surface to achieve electrolytic polishing of the workpiece.

[0055] The liquid storage tank of this utility model is made of corrosion-resistant material, and the optional alloy steel models include 309S, 310S, 201, 202, 2205, 2507, 2520, 301, 304, 316, 317L, 347H253MA, 254SMO, 904L, 420, 410, 409, 0Cr18Ni11Ti, etc.

[0056] In some embodiments, the liquid supply assembly includes a heating module that receives power after being connected to a power source;

[0057] The heating module is located inside the liquid storage tank to control the temperature of the liquid medicine, so that the liquid medicine can better meet the processing and use conditions.

[0058] Specifically, such as Figures 1 to 5 As shown, the heating module 5 is connected to the power supply 1 via cable 4 to obtain power.

[0059] It should be noted that the power supply of this invention uses a high-frequency electroplating power supply or a silicon controlled rectifier (SCR) rectifier. A current-stabilizing method is used to control the current density, which is controlled between 10-200 A / dm². 2 ,for example:

[0060] When the workpiece material is 690 nickel-based alloy, the current density is set to 52-68 A / dm. 2 ;

[0061] When the workpiece material is 316 stainless steel, the current density is set to 44-56 A / dm. 2 ;

[0062] When the workpiece material is 304 stainless steel, the current density is set to 20-40 A / dm. 2 .

[0063] The current control during operation of this utility model is calculated based on the current density under different processed materials. Generally, the larger the workpiece, the greater the current and the corresponding increase in voltage.

[0064] The temperature control probe is inserted into the liquid storage tank 15, and the temperature of the heating module 5 is adjusted and controlled after the real-time temperature data is collected by the electric control cabinet 14.

[0065] In some embodiments, the heating module can be selected from a stainless steel heater, a quartz heater or a Teflon heater.

[0066] In some embodiments, the liquid supply assembly comprises a first filter barrel connected between the first delivery pump and the liquid storage tank.

[0067] Specifically, as shown in the drawings, Figures 1 to 5 The inlet pipe 6 of the first filter barrel 7 is connected to the liquid storage tank 15, and the outlet pipe is connected to the first delivery pump 9, so as to filter the liquid medicine in the delivery process, avoid the damage of the back delivery of sundries to the pumping components, and avoid affecting the processing quality.

[0068] The first filter barrel and the matching pipe piece of the utility model are made of corresponding products made of corrosion-resistant plastic parts, including polyvinyl chloride (PVC), polyethylene (PE), polypropylene (PP), polyvinyl fluoride (PVDF), polytetrafluoroethylene (PTFE), soluble polytetrafluoroethylene (PFA), fluorinated ethylene propylene copolymer (FEP), polyether ether ketone (PEEK), liquid crystal polymer (LCP) and polyphenylene sulfide (PPS).

[0069] In some embodiments, the first delivery pump adopts a diaphragm metering pump, so as to more accurately control the delivery flow, and correspondingly, the liquid medicine can be fully infiltrated into the liquid storage layer to a certain extent.

[0070] In order to improve the economy and improve the energy saving effect, the device body can be set as follows: in some embodiments, the device body comprises a recovery assembly for recycling and recycling the residual liquid medicine after treatment, and the recovery assembly is connected to the liquid supply assembly to recover the liquid medicine.

[0071] The workpiece is placed in the recovery assembly for electric throwing treatment.

[0072] In some embodiments, as shown in the drawings, Figures 1 to 6 The recovery assembly comprises a liquid collecting tank 12, and the workpiece 11 is placed in the liquid collecting tank 12 for electrolytic polishing treatment.

[0073] The liquid collecting tank 12 is connected to the liquid supply assembly.

[0074] Specifically, as shown in the drawings, Figure 6 The liquid collecting tank 12 is connected to the liquid supply assembly through the delivery pipe connected to the liquid storage tank 15 at the lower position of the liquid collecting tank 12, and the recovery pump (i.e. the second delivery pump in the following text) is connected to the inlet of the pump.

[0075] It should be noted that, in order to facilitate the recovery of the liquid, in this example, the horizontal height of the liquid collecting tank 12 is higher than the horizontal height of the liquid storage unit of the liquid supply assembly (i.e. the horizontal height of the liquid storage tank 15). Here, the horizontal height generally refers to the horizontal height of the bottom of the container.

[0076] In some embodiments, as shown in Figure 6 the recovery assembly includes a second delivery pump 16 for providing active delivery power during the recovery of the liquid, so as to cope with the situation that the horizontal height of the liquid supply assembly cannot be flexibly set;

[0077] The second delivery pump 16 is connected to the liquid collecting tank 12 and the liquid supply assembly.

[0078] Specifically, the second delivery pump 16 is located between the liquid collecting tank 12 and the liquid storage tank 15, and is connected to the three through a corrosion-resistant delivery hose.

[0079] In some possible embodiments, the recovery assembly includes a second filter bucket (not shown in the figure), which is connected between the second delivery pump and the liquid collecting tank, so as to avoid the debris falling into the liquid collecting tank during the operation from being delivered to the second delivery pump and the subsequent pipeline, eliminate the damage risk of the debris to the subsequent pumping mechanism and pipeline, and also reduce the burden of the subsequent delivery unit (including the first delivery pump and the filtering mechanism).

[0080] The utility model is convenient to operate, as Figure 10 shown, the liquid supply pipeline 102 is provided on the outer wall of the brush head at 10103, and then the handle structure 17 made of a pipe made of insulating material is sleeved outside the liquid supply pipeline 102, so that the hand-held handle structure 17 is used for electric polishing operation. For example, the handle structure is made of PVC pipe material, which is heated and then sleeved outside the liquid supply pipeline 102, and then cooled to fix it.

[0081] As described above, during the operation of the utility model, the liquid supply assembly stores the chemical liquid used for electrolytic polishing processing, the positive and negative poles of the power supply are connected to the processing assembly and the workpiece respectively, the processing assembly (liquid) is set as the negative pole, the workpiece is set as the positive pole, the liquid supply assembly provides the liquid to the processing assembly, the working head of the processing assembly is placed close to the surface of the workpiece to be processed, the liquid storage layer immersed in the liquid is used as an intermediate medium to fill the surface (positive pole) of the workpiece and the processing assembly (negative pole), so as to isolate the two and prevent the workpiece and the processing assembly from directly contacting each other. After being powered on, the brush head moves on the surface of the workpiece to perform electrolytic polishing processing on the corresponding area. Therefore, the utility model is suitable for occasions where the traditional electric polishing process is difficult to cope with.

[0082] The basic principle and main features of the present application and the advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. An electrolytic polishing device for nuclear products, comprising a device body for electrolytic chemical polishing of a workpiece to be processed, characterized in that, The device body comprises a liquid supply assembly, a processing assembly and a power supply, the processing assembly is connected to the liquid supply assembly and the negative pole of the power supply, and the workpiece is connected to the positive pole of the power supply; The processing assembly comprises a brush head, the brush head has an inner cavity and liquid outlet holes, the liquid outlet holes are densely arranged on one side surface of the brush head and communicate with the inner cavity of the brush head; The inner cavity of the brush head is connected to the liquid supply assembly; The side surface of the brush head provided with the liquid outlet holes is provided with a liquid storage layer, and the liquid storage layer covers the liquid outlet holes.

2. The nuclear power product electropolishing apparatus of claim 1, wherein The liquid storage layer is made of non-woven fabric or dust-free cloth.

3. The nuclear power product electropolishing apparatus of claim 1, wherein The liquid outlet holes on the side surface of the brush head provided with the liquid storage layer are arranged as follows: From the center area of the surface of the brush head provided with the liquid outlet holes to the outside, the diameters of the liquid outlet holes gradually increase.

4. The nuclear power product electropolishing apparatus of claim 1, wherein In the inner cavity of the brush head, the inner wall connected to the liquid inlet is in a concave arc surface structure.

5. The nuclear power product electropolishing apparatus of claim 1, wherein The liquid supply assembly comprises a liquid storage tank and a first conveying pump, and the first conveying pump is connected to the power supply; The first conveying pump is connected to the liquid storage tank and the processing assembly through a conveying pipeline.

6. The nuclear power product electropolishing apparatus of claim 5, wherein, The liquid supply assembly comprises a heating module, and the heating module is connected to the power supply; The heating module is arranged in the liquid storage tank.

7. The nuclear power product electropolishing apparatus of claim 6, wherein The heating module is selected from a stainless steel heater, a quartz heater or a Teflon heater.

8. The nuclear power product electropolishing apparatus of claim 5, wherein, The liquid supply assembly comprises a first filter barrel, and the first filter barrel is connected between the first conveying pump and the liquid storage tank.

9. The nuclear power product electropolishing apparatus of claim 5, wherein, The first conveying pump is a diaphragm metering pump.

10. The nuclear power product electropolishing apparatus according to any one of claims 1 to 9, characterized by The device body comprises a recovery assembly, and the recovery assembly is connected to the liquid supply assembly; The workpiece is placed in the recovery assembly.

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