Pipeline valve surface rust-proof treatment process
The shot peening and electroplating box design that carries cast iron balls through water flow solves the problem of rust on the surface of the pipe valve, realizes fully automated shot peening and electroplating, simplifies the process flow, reduces costs and improves efficiency.
Patent Information
- Application Number
- CN202510711291.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-29
- Publication Date
- 2025-07-11
AI Technical Summary
The surface of existing pipeline valves is prone to rust in humid environments, the shot peening operation is difficult to fully automate, the clamping position of the fixture is not easy to be in place, the electroplating solution is easy to react and inconvenient to manage, resulting in complex process and high cost.
The method of carrying cast iron balls is shot peened by water flow, combined with the electroplating box design, fully automatic shot peening and electroplating are achieved to avoid mid-transportation. The electroplating solution is only injected during use, and the cast iron balls and iron filings are recovered to reduce the difficulty of cleaning and the reaction of the electroplating solution.
The process flow is simplified, costs are reduced, fully automated shot peening and electroplating are realized, avoiding hanging point leakage plating, and improving efficiency and electroplating solution management efficiency.
Smart Images
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Abstract
Description
Technical Field
[0001] The present invention relates to the field of metal electroplating, and particularly to an anti-rust treatment process for the surface of pipeline valves. Background Art
[0002] Due to being in a humid environment for a long time, the surface of pipeline valves is prone to rust. In order to improve the performance of pipeline valves, enhance their anti-rust ability, and extend their service life, it is necessary to perform anti-rust treatment on the surface of pipeline valves. Commonly used methods are painting and coating.
[0003] Before metal coating, generally, cleaning, rust removal, deburring, polishing and other treatments are required. This is not only cumbersome but also consumes a large amount. Among them, rust removal, deburring, and polishing can all be treated by shot peening. Generally, there are four types of shots for shot peening: cast iron shots, cast iron shots, glass shots, and ceramic shots.
[0004] Among them, cast iron shots have good toughness and long service life, but their hardness is relatively low. Cast iron shots have high hardness but are brittle and easy to break. Glass shots and ceramic shots are relatively costly and are generally used in materials that do not allow iron contamination. Cast iron shots are prone to breakage after multiple uses, generating a large amount of iron filings, which need to be removed, while intact cast iron shots are worthy of recycling and reuse.
[0005] Some shot peening operations are carried out in a closed space. In this case, it is relatively easy to recycle cast iron shots, but iron filings are likely to adhere to various chamber walls, corners, and gaps, making them difficult to clean.
[0006] At the same time, during shot peening, due to the irregularity of pipeline valves, it is necessary to manually hold the spray nozzle to align with the corners of pipeline valves to ensure the comprehensiveness of shot peening operations. Therefore, it is very difficult to achieve fully automated shot peening. Even so, it is also very difficult to take care of the positions where the pipeline valves are clamped by jigs. Moreover, the positions where the pipeline valves are clamped by jigs are not only difficult to take care of during shot peening but also prone to the phenomenon of missed plating at the hanging points during electroplating.
[0007] In factories, electroplating solutions are generally placed in the open for convenient use. Not only are some of their components prone to react with air, but also water evaporation and loss during long-term placement lead to crystallization of the plating solution. Therefore, after a long time, it is necessary to appropriately replenish water, but it is very difficult to grasp the appropriate amount. At the same time, electroplating solutions are prone to impurities after long-term use and need to be treated regularly to extend their service life. Summary of the Invention
[0008] The purpose of the present invention is to provide a process for rust prevention treatment of pipeline valve surfaces, which uses water flow to carry cast iron shots for shot peening, and combined with the restrictions of the electroplating box, the cast iron shots can completely flow into the preset pipeline along the water flow, which is convenient for collecting cast iron shots, iron filings and sewage, and then the box is flushed with clean water in the valve cleaning process after shot peening, and the cast iron shots are cleaned at the same time. This solution greatly reduces the process complexity and saves costs through process optimization and equipment improvement.
[0009] A pipeline valve surface anti-rust treatment device, comprising a treatment box, a drive assembly, a shot blasting and cleaning assembly and an electroplating assembly, wherein the drive assembly is provided with a pair of and respectively fixedly connected to the left and right side walls of the treatment box, and a friction roller is connected to the drive assembly through a connecting piece, and the shot blasting and cleaning assembly comprises an inner shot blasting mechanism and an outer shot blasting mechanism;
[0010] The internal shot blasting mechanism includes an internal shot blasting tube, an internal shot blasting nozzle and a telescopic control member, wherein a pair of telescopic control members are provided and are respectively fixedly connected to the front and rear side walls of the processing box, the internal shot blasting tube is telescopically connected to the telescopic control member and is slidably connected to the processing box, and the internal shot blasting nozzle is fixedly connected to the outer end of the internal shot blasting tube;
[0011] The external shot blasting mechanism includes an external shot blasting tube, an external shot blasting nozzle and a telescopic rotating control member. A pair of the telescopic rotating control members are provided and are respectively fixedly connected to the left and right side walls of the processing box. Four external shot blasting tubes are movably connected to each telescopic rotating control member, and the outer end of each external shot blasting tube is connected to the external shot blasting nozzle.
[0012] The electroplating assembly comprises a magnetic wheel and an anode seat. The magnetic wheel is rotatably connected to the connecting piece through a bracket and is communicated with the cathode. The anode seat is fixedly connected to the bottom plate of the processing box and is communicated with the anode.
[0013] The anti-rust treatment process implemented by the right anti-rust treatment equipment includes the following steps:
[0014] Step 1: Positioning the valve body
[0015] Place the valve body on the friction roller and ensure that the valve body is located in the center of the treatment box;
[0016] Step 2: Shot Peening
[0017] After the valve body is placed, the telescopic rotation control component controls the outer shot blasting tube to extend to the predetermined position, and then the drive assembly is started to drive the friction roller to rotate, the friction roller rotates to drive the valve body to rotate, and then the inner shot blasting nozzle and the outer shot blasting nozzle spray cast iron shots toward the valve body;
[0018] During the shot blasting process, the telescopic control part controls the inner shot blasting tube to slowly extend forward, and the telescopic rotation control part controls the outer shot blasting tube to repeatedly rotate within the range of °;
[0019] Step 3: Cleaning by Spraying with Clear Water
[0020] After shot peening, clear water is sprayed onto the valve body through the inner shot peening nozzle and the outer shot peening nozzle to clean the valve body. During the water spraying cleaning process, the telescopic control member controls the inner shot peening pipe to slowly retreat, and the telescopic rotation control member controls the outer shot peening pipe to rotate repeatedly within a range of °;
[0021] Step 4: Electroplating
[0022] After the cleaning operation is completed, the telescopic rotation control member controls the outer shot peening pipe to retract, then an electrolytic solution is injected into the processing box body, an electroplating rod is inserted on the anode seat, and then the magnetic wheel and the anode seat are energized for electroplating.
[0023] Preferably, a funnel is provided at the bottom of the processing box body. A funnel sealing plate is also slidably connected to the connection between the upper end of the funnel and the processing box body. A filter screen is further provided in the funnel. A cast iron shot discharge pipe is fixedly connected to the side wall of the funnel above the filter screen. A drain pipe is also connected to the bottom of the funnel.
[0024] Preferably, a discharge pipe opening and closing plate is also slidably connected to the connection between the cast iron shot discharge pipe and the funnel.
[0025] Preferably, a support is provided at the bottom of the processing box body, and a support plate is also fixedly connected to the bottom of the processing box body. The driving assembly is fixedly connected to the support plate through the driving assembly support column.
[0026] Preferably, a servo motor is provided in the driving assembly, and the servo motor is connected to the friction roller through a belt pulley and a belt. A telescopic motor is provided in the telescopic control member, and the inner end of the inner shot peening pipe is connected to the output shaft of the telescopic motor. A rotary telescopic cylinder is provided in the telescopic rotation control member, and the inner end of the outer shot peening pipe is connected to the output shaft of the rotary telescopic cylinder.
[0027] Preferably, a delivery pipe is connected to both the telescopic control member and the telescopic rotation control member. The inner shot peening pipe and the outer shot peening pipe are communicated with the delivery pipe.
[0028] Preferably, an electroplating solution delivery pipe is also connected to the bottom of the processing box body.
[0029] The advantages of the present invention are as follows: 1. During the queuing and transfer process of the valves that have just been shot peened and cleaned, their outer surfaces are easily oxidized. Therefore, it is necessary to enter the electroplating process as soon as possible. In this solution, shot peening, cleaning, and electroplating operations are carried out in sequence in the electroplating box body, without the need to transfer the semi-finished products to different workstations multiple times in the middle, greatly reducing the process complexity and saving costs.
[0030] 2. Shot peening uses water flow to carry cast iron shots, and the bottom of the electroplating box adopts a funnel-shaped design, so that the cast iron shots and broken iron filings can flow into the preset pipe along the water flow, which is convenient for recycling cast iron shots, iron filings and sewage;
[0031] 3. The water flow can more easily carry the cast iron shot and spray it out at a faster speed, which increases the shot peening effect. In addition, the water flow itself can also achieve the effect of preliminary cleaning of the valve and cast iron shot.
[0032] 4. The valve cleaning process after shot blasting can not only thoroughly clean the valve, but also the electroplating box and cast iron shot will be flushed again when the clean water is discharged during the process, which can further remove the iron filings and complete the cast iron shot cleaning operation at the same time, so that the cast iron shot can be directly reused after recovery.
[0033] 5. During shot peening, the nozzles on both the horizontal and vertical sides cooperate with the self-rotating pipe valves. Since there is no fixed clamping point, the pipe valves can be shot peened comprehensively and completely. At the same time, there will be no hanging point or missed plating in the subsequent electroplating process.
[0034] 6. The plating solution is injected into the plating box only during the plating operation. After the plating is completed, it will flow back into the sealed storage tank, which not only avoids water evaporation, but also prevents the plating solution from reacting with air. At the same time, all plating solutions are stored in the storage tank, which is also convenient for unified treatment (such as activated carbon cleaning, etc.). BRIEF DESCRIPTION OF THE DRAWINGS
[0035] Figure 1 It is a structural schematic diagram of the upper part of the device of the present invention;
[0036] Figure 2 It is a structural schematic diagram of the lower part of the device of the present invention;
[0037] Figure 3 It is a schematic diagram of the structure inside the processing box in the device of the present invention;
[0038] Figure 4 It is a schematic diagram of the structure inside the funnel in the device of the present invention;
[0039] Figure 5 It is a structural schematic diagram of the valve body in the device of the present invention;
[0040] Among them, 01, valve body; 101, processing box body; 102, inner shot blasting pipe; 103, inner shot blasting nozzle; 104, telescopic control part; 105, outer shot blasting pipe; 106, outer shot blasting nozzle; 107, telescopic and rotary control part; 108, conveying pipe; 109, driving assembly; 110, connecting column; 111, friction roller; 112, magnetic wheel; 113, anode seat; 114, electroplating solution conveying pipe; 115, funnel; 116, funnel sealing plate; 117, filter screen; 118, cast iron shot discharge pipe; 119, drain pipe; 120, discharge pipe opening and closing plate; 121, bracket; 122, support plate; 123, driving assembly support column. Detailed implementation manners
[0041] To make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation manners.
[0042] As Figures 1 to 5 shown, the present invention includes a processing box body 101, a driving assembly 109, a shot blasting and cleaning assembly, and an electroplating assembly. A pair of driving assemblies 109 are provided and are respectively fixedly connected to the left and right side walls of the processing box body 101. A friction roller 111 is connected to the driving assembly 109 through a connecting piece 110. The shot blasting and cleaning assembly includes an inner shot blasting mechanism and an outer shot blasting mechanism;
[0043] The inner shot blasting mechanism includes an inner shot blasting pipe 102, an inner shot blasting nozzle 103, and a telescopic control part 104. A pair of telescopic control parts 104 are provided and are respectively fixedly connected to the front and rear side walls of the processing box body 101. The inner shot blasting pipe 102 is telescopically connected to the telescopic control part 104 and is slidably connected to the processing box body 101. The inner shot blasting nozzle 103 is fixedly connected to the outer end of the inner shot blasting pipe 102. The outer shot blasting mechanism includes an outer shot blasting pipe 105, an outer shot blasting nozzle 106, and a telescopic and rotary control part 107. A pair of telescopic and rotary control parts 107 are provided and are respectively fixedly connected to the left and right side walls of the processing box body 101. Four outer shot blasting pipes 105 are movably connected to each telescopic and rotary control part 107, and an outer shot blasting nozzle 106 is connected to the outer end of each outer shot blasting pipe 105;
[0044] During the shot blasting process, the telescopic control part 104 controls the inner shot blasting pipe 102 to slowly extend forward, and the telescopic and rotary control part 107 controls the outer shot blasting pipe 105 to rotate repeatedly within a range of 90° (move within a range of 90° with the center point directly below).
[0045] The electroplating assembly includes a magnetic wheel 12 and an anode seat 113. The magnetic wheel 12 is rotatably connected to the connecting piece 110 through a bracket and is connected to the cathode, and the anode seat 113 is fixedly connected to the bottom plate of the processing box body 101 and is connected to the anode.
[0046] During electroplating, electrolytic solution is injected into the treatment box body 101 through the electroplating solution delivery pipe 114. An electroplating rod is inserted onto the anode seat 113, and then the magnetic wheel 12 and the anode seat 113 are electrified for electroplating.
[0047] Specifically, a funnel 115 is provided at the bottom of the treatment box body 101. A funnel sealing plate 106 is also slidably connected to the connection between the upper end of the funnel 115 and the treatment box body 101. A filter screen 117 is further provided inside the funnel 115. A cast iron shot discharge pipe 118 is fixedly connected to the side wall of the funnel 115 above the filter screen 117, and a drain pipe 119 is also connected to the bottom of the funnel 115.
[0048] During shot peening, water flow will carry the cast iron shots into the funnel 115 at the bottom of the treatment box body 101 (it is necessary to pull out the funnel sealing plate 106 in advance to open the funnel 115). The cast iron shots will be intercepted by the filter screen 117 in the funnel 115, while dust, oil stains, metal chips, etc. will flow away along with the water through the drain pipe 119 at the bottom of the funnel 115.
[0049] In addition, a discharge pipe opening and closing plate 120 is also slidably connected to the connection between the cast iron shot discharge pipe 118 and the funnel 115.
[0050] The discharge pipe opening and closing plate 120 can be opened to take away the cast iron shots on the filter screen 117 through the cast iron shot discharge pipe 118, so that the cast iron shots can be recycled for the next shot peening, reducing unnecessary waste.
[0051] A support 121 is provided at the bottom of the treatment box body 101, and a support plate 122 is also fixedly connected to the bottom of the treatment box body 101. The driving assembly 109 is fixedly connected to the support plate 122 through the driving assembly support column 123.
[0052] Specifically, a servo motor is provided inside the driving assembly 109, and the servo motor is connected to the friction roller 111 through a belt pulley and a belt. A telescopic motor is provided inside the telescopic control member 104, and the inner end of the inner shot peening pipe 102 is connected to the output shaft of the telescopic motor. A rotary telescopic cylinder is provided inside the telescopic rotary control member 107, and the inner end of the outer shot peening pipe 105 is connected to the output shaft of the rotary telescopic cylinder. Delivery pipes 108 are connected to both the telescopic control member 104 and the telescopic rotary control member 107. The inner shot peening pipe 102 and the outer shot peening pipe 105 are communicated with the delivery pipes 108.
[0053] Among them, a electroplating solution delivery pipe 114 is also connected to the bottom of the treatment box body 101.
[0054] Specific implementation methods and principles:
[0055] Before electroplating, it is necessary to first perform cleaning, rust removal, deburring, polishing, etc. Therefore, firstly, the valve body 01 is placed on the friction roller 111 , and ensure that the valve body 01 is located at the center of the processing box 101 .
[0056] After the valve body 01 is placed, the outer shot blasting tube 105 is extended to a predetermined position through the telescopic rotation control member 107, and then the driving assembly 109 is started to drive the friction roller 111 to rotate. The rotation of the friction roller 111 drives the valve body 01 to rotate, and then the external pump conveys the water flow with cast iron shots to the inner shot blasting tube 102 and the outer shot blasting tube 105 through the conveying pipe 108, and finally the cast iron shots are sprayed toward the valve body 01 through the inner shot blasting nozzle 103 and the outer shot blasting nozzle 106;
[0057] During the shot blasting process, the telescopic control component 104 controls the inner shot blasting tube 102 to slowly extend forward, and the telescopic rotation control component 107 controls the outer shot blasting tube 105 to repeatedly rotate within a range of 90° (moving within a range of 90° with the bottom as the center point). During the shot blasting process, the water flow will carry the cast iron shots to the funnel 115 at the bottom of the processing box 101 (the funnel sealing plate 106 needs to be pulled out in advance to open the funnel 115), and the cast iron shots will be retained by the filter 117 in the funnel 115, while dust, oil stains, metal debris, etc. will be discharged along the water flow through the drain pipe 119 at the bottom of the funnel 115.
[0058] Then, after the shot blasting is completed, the external pump delivers pure water flow to the inner shot blasting tube 102 and the outer shot blasting tube 105 through the delivery pipe 108, and sprays clean water towards the valve body 01 through the inner shot blasting nozzle 103 and the outer shot blasting nozzle 106 to clean the valve body 01, which is mainly used to clean the metal debris remaining on the valve body 01. During the water spray cleaning process, the telescopic control component 104 controls the inner shot blasting tube 102 to slowly retreat, and the telescopic rotation control component 107 controls the outer shot blasting tube 105 to repeatedly rotate within a range of 90° (moving within a range of 90° with the bottom as the center point).
[0059] The clean water used to clean the valve body 01 will eventually flow away from the funnel 115 at the bottom of the treatment box 101, and this process will also perform secondary cleaning on the cast iron shot.
[0060] After the cleaning operation is completed, the telescopic rotation control member 107 controls the outer shot blasting tube 105 to retract (at this time, the inner shot blasting tube 102 has been retracted in the previous process), and then the funnel sealing plate 106 closes the closed funnel 115. Then the discharge pipe opening and closing plate 120 is opened, and the cast iron shots on the filter screen 117 are taken out through the cast iron shot discharge pipe 118, and finally the electrolytic solution is injected into the treatment box 101 through the electroplating solution delivery pipe 114, and the electroplating rod is inserted into the anode seat 113, and then the magnetic wheel 12 and the anode seat 113 are energized to perform electroplating.
[0061] During the electroplating process, the starting drive assembly 109 still drives the valve body 01 to rotate (the magnetic wheel 12 will rotate accordingly, and due to the magnetism of the magnetic wheel 12, the magnetic wheel 12 always keeps in close contact with the valve body 01). Therefore, there is no fixed clamping point, and the phenomenon of missed plating at the hanging point will not occur. After electroplating is completed, the funnel sealing plate 106 is opened, and the electroplating solution flows away through the funnel 115 and the drain pipe 119 for recycling.
[0062] Based on the above, in the present invention, shot peening is carried out by means of water flow carrying cast iron shots, and combined with the limitation of the electroplating box, the cast iron shots can completely flow into the preset pipeline along with the water flow, which is convenient for collecting the cast iron shots, iron filings and sewage. Then, the box body is flushed with clean water in the cleaning valve process after shot peening, and the cast iron shots are cleaned incidentally. This solution greatly reduces the process complexity and saves costs through the optimization of the process and the improvement of the equipment.
[0063] As is known by technical common sense, the present invention can be implemented by other embodiments without departing from its spiritual essence or essential features. Therefore, the above-disclosed embodiments are illustrative in all aspects and not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are encompassed by the present invention.
Claims
1. An anti-rust treatment device for the surface of a pipeline valve, characterized in that, It includes a processing box body (101), a driving assembly (109), a shot blasting and cleaning assembly, and an electroplating assembly. A pair of the driving assemblies (109) are provided and are respectively fixedly connected to the left and right side walls of the processing box body (101). A friction roller (111) is connected to the driving assembly (109) through a connecting piece (110). The shot blasting and cleaning assembly includes an inner shot blasting mechanism and an outer shot blasting mechanism; The inner shot blasting mechanism includes an inner shot blasting pipe (102), an inner shot blasting nozzle (103), and a telescopic control member (104). A pair of the telescopic control members (104) are provided and are respectively fixedly connected to the front and rear side walls of the processing box body (101). The inner shot blasting pipe (102) is telescopically connected to the telescopic control member (104) and is slidably connected to the processing box body (101). The inner shot blasting nozzle (103) is fixedly connected to the outer end of the inner shot blasting pipe (102); The outer shot blasting mechanism includes an outer shot blasting pipe (105), an outer shot blasting nozzle (106), and a telescopic and rotary control member (107). A pair of the telescopic and rotary control members (107) are provided and are respectively fixedly connected to the left and right side walls of the processing box body (101). Four outer shot blasting pipes (105) are movably connected to each telescopic and rotary control member (107). The outer end of each outer shot blasting pipe (105) is connected to an outer shot blasting nozzle (106); The electroplating assembly includes a magnetic wheel (12) and an anode seat (113). The magnetic wheel (12) is rotatably connected to the connecting piece (110) through a bracket and is connected to the cathode. The anode seat (113) is fixedly connected to the bottom plate of the processing box body (101) and is connected to the anode.
2. The rust prevention treatment process implemented by the rust prevention treatment equipment described in claim 1, characterized in that, It includes the following steps: Step 1: Positioning and placing the valve body (01) Place the valve body (01) on the friction roller (111) and ensure that the valve body (01) is located at the central position inside the processing box body (101); Step 2: Shot blasting After the valve body (01) is placed well, the telescopic and rotary control member (107) controls the outer shot blasting pipe (105) to extend to a predetermined position. Then start the driving assembly (109) to drive the friction roller (111) to rotate. The rotation of the friction roller (111) drives the valve body (01) to rotate. Then the inner shot blasting nozzle (103) and the outer shot blasting nozzle (106) spray cast iron shots at the valve body (01); During the shot blasting process, the telescopic control member (104) controls the inner shot blasting pipe (102) to slowly extend forward, and the telescopic and rotary control member (107) controls the outer shot blasting pipe (105) to rotate repeatedly within a range of 90°; Step 3: Cleaning by spraying clean water After the shot blasting is completed, spray clean water at the valve body (01) through the inner shot blasting nozzle (103) and the outer shot blasting nozzle (106) to clean the valve body (01). During the water spraying and cleaning process, the telescopic control member (104) controls the inner shot blasting pipe (102) to slowly retract, and the telescopic and rotary control member (107) controls the outer shot blasting pipe (105) to rotate repeatedly within a range of 90°; Step 4: Electroplating After the cleaning operation is completed, the telescopic and rotating control member (107) controls the outer shot blasting pipe (105) to retract, then electrolytic solution is injected into the processing box body (101), an electroplating rod is inserted on the anode seat (113), and then the magnetic wheel (12) and the anode seat (113) are energized for electroplating.
3. A surface rust prevention treatment process for pipeline valves according to claim 1, characterized in that: A funnel (115) is provided at the bottom of the processing box body (101). A funnel sealing plate (106) is also slidably connected to the connection between the upper end of the funnel (115) and the processing box body (101). A filter screen (117) is further provided in the funnel (115). A cast iron shot discharge pipe (118) is fixedly connected to the side wall of the funnel (115) above the filter screen (117). A drain pipe (119) is also connected to the bottom of the funnel (115).
4. A surface rust prevention treatment process for pipeline valves according to claim 3, characterized in that: A discharge pipe opening and closing plate (120) is also slidably connected to the connection between the cast iron shot discharge pipe (118) and the funnel (115).
5. A surface anti-rust treatment process for pipeline valves according to claim 1, characterized in that: A support (121) is provided at the bottom of the processing box body (101), and a support plate (122) is fixedly connected to the bottom of the processing box body (101). The driving assembly (109) is fixedly connected to the support plate (122) through a driving assembly support column (123).
6. A surface rust prevention treatment process for pipeline valves according to claim 1, characterized in that: A servo motor is provided in the driving assembly (109), and the servo motor is connected to the friction roller (111) through a belt pulley and a belt. A telescopic motor is provided in the telescopic control member (104), and the inner end of the inner shot blasting pipe (102) is connected to the output shaft of the telescopic motor. A rotary telescopic cylinder is provided in the telescopic and rotating control member (107), and the inner end of the outer shot blasting pipe (105) is connected to the output shaft of the rotary telescopic cylinder.
7. A surface rust prevention treatment process for pipeline valves according to claim 1, characterized in that: Delivery pipes (108) are connected to both the telescopic control member (104) and the telescopic and rotating control member (107). The inner shot blasting pipe (102) and the outer shot blasting pipe (105) are communicated with the delivery pipes (108).
8. A surface rust prevention treatment process for pipeline valves according to claim 1, characterized in that: A plating solution delivery pipe (114) is also connected to the bottom of the processing box body (101).