Workpiece rust pre-treatment cleaning apparatus

Abstract

The utility model relates to a kind of workpiece rust trace pretreatment cleaning equipment, including soaking pool, the bottom of the soaking pool is connectable with the collection of slag pipe of filtering recovery component, the recovery clear liquid output end of the filtering recovery component is connected with the liquid mixing module capable of being supplemented with rust removal agent by backflow infusion pipeline, the output end of the liquid mixing component is also connected with liquid storage tank, and the liquid outlet of the liquid storage tank is communicated with the soaking pool;The liquid mixing component is according to the mode of annular multiple-point injection rust removal agent on the flow guide main pipe and is equipped with injection ring. The utility model can maintain the rust removal efficiency and rust removal quality of rust removal solution in rust removal soaking pool and reduce the waste amount of water resources by circulating treatment to rust removal solution.

Description

Technical Field

[0001] This utility model relates to the field of rust removal equipment technology, and in particular to a workpiece rust pretreatment and cleaning equipment. Background Technology

[0002] To improve the lifespan, surface properties, and aesthetics of workpieces, spray coating is often required. This results in superior sound insulation, heat insulation, and fire resistance. Conventional metal workpieces are typically made of ferrous metals, often resulting in rust on the surface of raw materials such as sheet metal or rough blanks. This prevents direct spray coating, necessitating rust removal as a pretreatment to improve the workpiece's appearance and the subsequent coating effect and quality. Rust removal is a technique that uses chemical, electrochemical, and mechanical methods to remove oxides from the surface of equipment and its components. Chemical rust removal, also known as etching or pickling, utilizes acidic or alkaline solutions to react chemically with the rust layer on the metal surface, dissolving and peeling off the rust.

[0003] For example, patent document CN219342298U discloses a workpiece immersion rust removal device, which improves the comprehensiveness and efficiency of rust removal by modifying the workpiece holding structure. However, after a long period of operation, a large amount of rust residue accumulates at the bottom of the rust removal immersion tank, and the concentration of rust-removing solutes in the solution gradually decreases as they react with the rust, affecting the rust removal effect during batch continuous processing. Since the content of rust-removing agent in the tank decreases after a long reaction, the existing operation method is to periodically empty the solution in the tank and replace it with a new batch of solution for rust removal. However, this overall replacement operation is cumbersome, and there is also a large difference in the actual rust removal effect due to the higher concentration of agent in the early stage than in the later stage within a single use cycle. It is impossible to guarantee the approximate uniformity of the rust removal effect of multiple batches of workpieces treated within a single use cycle. This replacement method also leads to a large waste of water resources and increases the processing cost. Utility Model Content

[0004] The purpose of this invention is to provide a pretreatment and cleaning device for workpiece rust that can circulate the rust removal solution to maintain the rust removal efficiency and quality of the rust removal solution in the rust removal soaking tank, while reducing water waste. This addresses the problems of existing immersion rust removal devices, which require periodic replacement of the entire tank solution, resulting in high costs and maintenance difficulties. These devices are not suitable for long-term continuous rust removal and cause significant water waste. Furthermore, the immersion rust removal device suffers from a continuous decrease in the concentration of the reagent, leading to significant differences in the rust removal effect between the early and later stages. This makes it impossible to guarantee the treatment quality of multiple batches of rust-removed workpieces, resulting in obvious quality deviations. Direct replacement also leads to reagent loss, causing some residual reagent to be unusable and increasing processing costs.

[0005] The technical solution adopted by this utility model is as follows: a workpiece rust pretreatment and cleaning device, including an immersion tank, a slag collection pipe that can be connected to a filtration and recovery component is provided at the bottom of the immersion tank, the output end of the filtration and recovery component is connected to a mixing module that can replenish rust removal agent through a return liquid pipeline, the output end of the mixing component is also connected to a storage tank, and the outlet of the storage tank is connected to the immersion tank; the mixing component is fitted with a filling ring on the guide pipe in a circumferential multi-point filling manner for rust removal agent.

[0006] According to a preferred embodiment, a coaxial partition column is provided inside the main flow guide to separate multiple streams of rust-removing agent injected radially into the annular surface. The working position of the coaxial partition column in the main flow guide is positioned by support rods spaced around its column body. A turbulence turbine is also provided inside the main flow guide. Multiple injection ports are inserted into the annular wall of the main flow guide in a rotationally symmetrical manner around its central axis.

[0007] According to a preferred embodiment, the injection ring includes a liquid guiding ring tube, a liquid guiding tube, and an equal pressure conducting valve, wherein a liquid guiding tube capable of introducing rust removal agent is inserted into the outer ring surface of the liquid guiding ring tube, and the equal pressure conducting valve is also inserted at intervals into the inner ring surface of the liquid guiding ring tube.

[0008] According to a preferred embodiment, an open baffle and a cross support frame perpendicular to the axis of the valve body are provided inside the equal pressure valve. A sealing column is installed at the center intersection of the cross support frame, and a connecting sleeve is movably fitted on the sealing column. A pre-tightening spring capable of limiting the insertion depth of the sealing column is provided inside the connecting sleeve. A movable baffle that limits the movement of the sealing column against the surface of the open baffle is also provided at the end of the connecting sleeve away from the sealing column. An auxiliary guide rod is also centrally provided on the plate surface of the movable baffle away from the connecting sleeve, and the auxiliary guide rod movably passes through the open baffle.

[0009] According to a preferred embodiment, a pressurized supply tank for supplying rust-removing agents is also connected to the inlet end of the liquid guide pipe, and a pressurized supply pump is provided inside the pressurized supply tank.

[0010] According to a preferred embodiment, the filtration and recovery assembly is equipped with a sedimentation module and a filtration module in a manner that allows the rust removal solution to settle and be filtered to separate the recovered clear liquid.

[0011] According to a preferred embodiment, the input end of the settling module is connected to the slag collection pipe through a recovery pipe head, and multiple slow-flow inclined plates are arranged alternately in the U-shaped tube body of the settling module, and a slag discharge port is provided on the bottom sedimentation cavity of the U-shaped tube body.

[0012] According to a preferred embodiment, the filtration module includes a connecting elbow fitting onto the output end of the U-shaped tube, and the output end of the connecting elbow is connected to a filter, and the output end of the filter is connected to the return infusion pipeline via a storage tank with a pumping unit.

[0013] The beneficial effects of this utility model are:

[0014] The mixing component in this application replenishes the concentration of the reflux solution output from the filtration and recovery component, effectively increasing the concentration of the rust-removing solution. This ensures that the concentration of the recycled rust-removing agent remains within an optimal threshold range, guaranteeing the rust removal effect during continuous large-scale workpiece removal and significantly improving the stability of batch processing. The mixing component adds rust-removing agent to the directional flow of the recovered solution in a circumferential, multi-point injection manner, accelerating the mixing of the recovered solution and the rust-removing agent, improving mixing uniformity and efficiency. This application constructs a circulation loop through the cooperation of the soaking tank, filtration and recovery component, slag collection pipe, reflux delivery pipeline, mixing module, and storage tank. This allows the rust-removing solution to be recycled, reducing water and agent waste, lowering processing costs, and minimizing the amount of wastewater requiring additional environmental treatment, thus improving environmental friendliness and continuous rust removal efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a preferred workpiece rust pretreatment and cleaning device proposed in this utility model;

[0016] Figure 2 This is an enlarged structural schematic diagram of the mixing module of a preferred workpiece rust pretreatment and cleaning device proposed in this utility model;

[0017] Figure 3This is a cross-sectional view of the isobaric valve of a preferred workpiece rust pretreatment and cleaning device proposed in this utility model.

[0018] List of reference numerals

[0019] 1: Soaking tank; 2: Filtration and recovery assembly; 3: Slag collection pipe; 4: Return infusion pipeline; 5: Mixing module; 6: Storage tank; 11: Bottom shell; 12: Cover shell; 13: Elastic clamp; 14: Support rod; 15: Heat insulation plate; 21: Sedimentation module; 22: Filtration module; 23: Recovery pipe head; 211: U-shaped pipe body; 212: Slow flow inclined plate; 213: Slag discharge port; 221: Connecting elbow; 222: Filter; 223: Pumping unit; 224: Storage tank; 51: Main guide pipe; 52: Injection ring; 5 3: Pressurized liquid supply tank; 511: Coaxial partition column; 512: Support rod; 513: Turbulence turbine; 514: Injection port; 521: Liquid guide ring; 522: Liquid guide pipe; 523: Isobaric valve; 531: Pressurized supply pump; 5231: Valve housing; 5232: Perforated baffle; 5233: Movable baffle; 5234: Cross support frame; 5235: Sealing column; 5236: Connecting sleeve; 5237: Preload spring; 5238: Auxiliary guide rod; 61: Inlet port; 62: Injection port; 63: Outlet pipe. Detailed Implementation

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the present utility model will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the drawings is only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] The technical solutions provided by this utility model will be described in detail below with reference to the accompanying drawings and through embodiments. It should be noted that the descriptions of these embodiments are for the purpose of helping to understand this utility model, but do not constitute a limitation thereof. In some examples, because some implementation methods belong to existing or conventional technology, they are not described or are not described in detail. The serial numbers assigned to components in this document, such as "first," "second," etc., are only used to distinguish the described objects and do not have any sequential or technical meaning.

[0022] The following is a detailed explanation with reference to the accompanying drawings.

[0023] Example 1

[0024] This application provides a workpiece rust pretreatment and cleaning device, which includes an immersion tank 1, a filter recovery component 2, a slag collection pipe 3, a return liquid delivery pipeline 4, a mixing module 5, and a liquid storage tank 6.

[0025] according to Figure 1-3 In one specific embodiment, the soaking tank 1 contains a sufficient amount of rust-removing solution, enabling the workpiece to be soaked and rust-removed using the solution. A collection pipe 3, connected to a filtration and recovery assembly 2, is located at the bottom of the soaking tank 1. The output end of the filtration and recovery assembly 2 is connected via a return flow pipeline 4 to a mixing module 5, which replenishes the rust-removing agent in the directional flow of the filtration and recovery solution. The output end of the mixing module 5 is also connected to a storage tank 6, which stores the mixed rust-removing solution. The outlet of the storage tank 6 is connected to the soaking tank 1, allowing it to continuously compensate for the rust-removing solution lost during solution changes and workpiece removal in the soaking tank 1, ensuring sufficient rust-removing solution to effectively submerge the workpiece placed in the soaking tank 1. The mixing module 5 uses a multi-point circumferential rust-removing agent injection method, with an injection ring 52 fitted onto the main guide pipe 51 for conveying the filtration and recovery solution. The mixing component 5 adds rust-removing agent to the directional flow formed by the recovered clear liquid in a circumferential multi-point injection manner, thereby accelerating the mixing of the recovered clear liquid and the rust-removing agent, improving the mixing uniformity and efficiency. The mixing component 5 in this application can replenish the concentration of the return clear liquid output from the filtration and recovery component 2, effectively increasing the agent concentration of the rust-removing solution. This ensures that the concentration of the recycled rust-removing agent is always maintained within an optimal threshold range, guaranteeing the rust-removing effect during continuous large-scale rust removal work and effectively improving the stability of batch processing. This application constructs a circulation loop through the cooperation of the soaking tank 1, the filtration and recovery component 2, the slag collection pipe 3, the return liquid supply pipeline 4, the mixing module 5, and the storage tank 6. This allows the rust-removing solution to be recycled, reducing water and agent waste, lowering processing costs, and reducing the amount of waste liquid requiring additional environmentally friendly treatment, thus improving environmental friendliness and continuous rust removal efficiency.

[0026] Preferably, four support legs are welded to the bottom corners of the soaking tank 1, allowing the soaking tank 1 to be suspended in the air, raising its position and facilitating the installation of the filter recovery assembly 2 and the slag collection pipe 3 at its bottom. Preferably, the soaking tank 1 is equipped with a support grid 11 to prevent the workpiece from touching the bottom. The support grid 11 is composed of several triangular bars interlocked, providing a support structure while preventing falling rust and impurities from accumulating on the bars. Preferably, the sidewalls of the soaking tank 1 can be equipped with functional products such as ultrasonic cleaners as needed, using cavitation bubbles generated by ultrasonic waves to accelerate rust removal. The ultrasonic cleaner is directly connected to an external power source via wires, and as a modular finished product, it allows operators to manually adjust parameters and control operation as needed, without requiring an additional automated control system. The additional installation of the ultrasonic cleaner on the cleaning tank is a direct addition to existing products and is not a necessary technical feature of this application; therefore, it will not be described in detail here.

[0027] Preferably, the filtration and recovery assembly 2 is constructed by separating the recovered clear liquid through static settling and filtration of the used rust removal solution. More preferably, the input end of the settling module 21 is connected to the collection and slag collection pipe 3 via a recovery pipe head 23. Specifically, the input end of the recovery pipe head 23 is connected to the collection and slag collection pipe 3 via a sealing flange. Preferably, multiple flow-slowing inclined plates 212 are arranged alternately and in alignment within the U-shaped tube body 211 of the settling module 21. The flow-slowing inclined plates 212 can gradually reduce the flow impact caused by the fluctuation of the liquid flow during waste liquid input, thereby allowing the waste liquid flowing into the bottom deposition cavity of the U-shaped tube body 211 to automatically settle, thus separating large-particle and heavy rust slag impurities. More preferably, a slag discharge port 213 is provided on the bottom deposition cavity of the U-shaped tube body 211. Preferably, the output end of the slag discharge port 213 is also equipped with a switch valve, allowing operators to manually control the discharge and cleaning of deposited rust slag according to the deposition time. Preferably, the U-shaped pipe 211 is connected to the output end of the recovery pipe head 23 by welding. Preferably, the filter module 22 includes a connecting elbow 221 fitted onto the output end of the U-shaped pipe 211. More preferably, a filter 222 is connected to the output end of the connecting elbow 221. Preferably, the output end of the filter 222 is connected to the return infusion pipeline 4 through a storage tank 224 with a pumping unit 223. Preferably, the filter 222 is a clamp-type No. 4 machine / flat flange type stainless steel bag filter or an SKFL series backwash self-cleaning filter, both of which can be adapted to the rust removal tank circulation system, with a processing capacity of 5-150m³. 3The filter offers low cost and convenient maintenance. The clamp-type No. 4 machine / flat flange type stainless steel bag filter can intercept impurities such as rust particles and metal shavings, supporting continuous filtration and filter bag cleaning and reuse. The SKFL series backwash self-cleaning filter integrates high-pressure backwashing technology, automatically removing impurities from the filter screen. The filtration accuracy is customizable from 60-400 mesh, suitable for high-load rust removal fluid filtration scenarios. Specifically, the filter 222 can be pre-assembled with compatible pipe head components at both ends via welding, assembly, or flange connection, thereby connecting to the connecting elbow 221 and the storage tank 224. Preferably, the pumping unit 223 is installed at the end of the return fluid pipeline 4 inserted into the storage tank 224, allowing for the directional output of the return clean liquid collected in the storage tank 224 when the electrical circuit is manually opened and closed. Preferably, the pumping unit 223 uses a corrosion-resistant pump of model LFE300S to assist in the directional delivery of the return clean liquid.

[0028] Preferably, the slag collection pipe 3 uses a conical-shaped irregular tube structure to discharge the lower layer of turbid liquid and settled rust residue from the soaking tank 1, thereby pre-transferring the relatively turbid bottom layer liquid. Preferably, a butterfly valve is installed at the discharge port of the slag collection pipe 3, so that when cleaning of the circulation pipeline is required, the connection between the pipeline and the soaking tank 1 can be cut off by closing the butterfly valve, allowing the soaking tank 1 to continue soaking and rust removal without interruption. Preferably, specifically, the slag collection pipe 3 is fixed to the bottom of the soaking tank 1 by welding and communicating with the tank cavity of the soaking tank 1, and the axial lower end of the slag collection pipe 3 is connected to the recovery pipe head 23 through a sealing flange.

[0029] Preferably, the inlet and outlet ends of the main guide pipe 51 of the mixing assembly 5 are connected to the return liquid supply line 4 and the inlet 61 of the storage tank 6 respectively via sealing flanges. Preferably, a coaxial separator 511 is provided inside the main guide pipe 51 to separate the multiple streams of rust remover injected radially around the annular surface. The working position of the coaxial separator 511 in the main guide pipe 51 is positioned by support rods 512 spaced around its body to prevent cross contact during injection of the multiple streams of rust remover, which would lead to a decrease in mixing force and ensure mobility after injection, thus facilitating effective and thorough mixing. Preferably, a turbulence turbine 513 is also provided inside the main guide pipe 51 near the output side. The turbulence turbine 513 can rotate under the drive of the liquid flow, thereby agitating the liquid flow and further agitating and thoroughly mixing the return liquid and the rust remover. Preferably, both sets of support rods 512 are axially spaced around the coaxial partition column 511, and are fixed at both ends of the support rods 512 to the outer wall of the coaxial partition column 511 and the inner wall of the main guide pipe 51 by welding. Preferably, the front end of the coaxial partition column 511 is configured as a diversion cone to facilitate the uniform diversion of the directional flow of the recovered clear liquid in the main guide pipe 51. The diversion cone can prevent the multiple radially injected rust removers from colliding and disturbing each other, so that the initial kinetic energy carried by the rust remover is used as much as possible to promote its effective dispersion and improve the dispersion effect. Preferably, multiple injection ports 514 are inserted into the annular wall of the main guide pipe 51 in a rotationally symmetrical manner around its central axis. Preferably, the injection ports 514 are sealed to the main guide pipe 51 by welding or other means, and a tight-fitting flange is provided at the end of the injection port 514 away from the main guide pipe 51. Preferably, a one-way inlet valve is also provided inside the injection port 514 to limit the one-way input of the rust remover into the main guide pipe 51. Preferably, the turbulence turbine 513 is positioned by a countersunk screw that penetrates its corner seat and is inserted into the wall of the main guide pipe 51.

[0030] Preferably, the injection ring 52 includes a liquid guiding ring tube 521, a liquid guiding tube 522, and an equal pressure valve 523. Preferably, a liquid guiding tube 522 for introducing rust remover is inserted into the outer ring surface of the liquid guiding ring tube 521. More preferably, equal pressure valves 523 for discharging rust remover at multiple points with equal pressure are also inserted at intervals into the inner ring surface of the liquid guiding ring tube 521. Preferably, the end of the equal pressure valve 523 away from the liquid guiding ring tube 521 is connected to the injection port 514. The injection ring 52 provided in this application can effectively disperse the added rust remover in the reflux liquid through radial multi-point injection on the annular surface. This allows the rust remover to mix more quickly and effectively with the reflux liquid. It eliminates the angle between the flow direction of the reflux liquid and the injection direction of the rust remover, and creates a certain degree of counter-current disturbance between the reflux liquid and the rust remover. This promotes faster dispersion of the rust remover in the reflux liquid, achieving efficient and uniform mixing of the rust remover with the reflux liquid.

[0031] Preferably, the equal pressure valve 523 includes a valve housing 5231, an orifice partition 5232, a movable baffle 5233, a cross support frame 5234, a sealing column 5235, a connecting sleeve 5236, a preload spring 5237, and an auxiliary guide rod 5238. Preferably, the orifice partition 5232 and the cross support frame 5234, perpendicular to the valve's axis, are provided within the valve housing 5231 of the equal pressure valve 523. Preferably, the sealing column 5235 is fixedly installed at the center intersection of the cross support frame 5234. More preferably, the connecting sleeve 5236 is movably fitted onto the sealing column 5235. Preferably, a preload spring 5237, capable of limiting the insertion depth of the sealing column 5235, is provided within the connecting sleeve 5236. Specifically, the end of the connecting sleeve 5236 away from the sealing post 5235 is also provided with a movable baffle 5233 that limits and abuts against the surface of the perforated partition 5232 to seal the through hole of the perforated partition 5232. Preferably, an auxiliary guide rod 5238 is also centrally fixedly provided on the plate surface of the movable baffle 5233 away from the connecting sleeve 5236, and the auxiliary guide rod 5238 moves through the perforated partition 5232 to help limit the movement direction of the movable baffle 5233. Preferably, a sealing gasket is affixed to the plate surface of the movable baffle 5233 facing the perforated partition 5232 to ensure the sealing performance of the abutment. Preferably, a sealing gasket is nested on the side wall of the inserted front end of the sealing post 5235. Specifically, the preload spring 5237 is always kept in a compressed state, with only variations in the amount of compression, to ensure that its initial state provides sufficient preload force to maintain the sealing and blocking effect and the stability of the limiting position of the movable baffle 5233. The equal pressure conducting valve 523 provided in this application enables multiple rust remover injection ports to inject equal amounts of rust remover synchronously at equal pressure, ensuring uniform dispersion of the rust remover and avoiding uneven concentrations in certain areas due to inconsistent injection volumes.

[0032] Preferably, a pressurized supply tank 53 for supplying rust-removing agent is connected to the inlet end of the liquid guide pipe 522. More preferably, a pressurized supply pump 531 capable of pressurizing and discharging the rust-removing agent is installed inside the pressurized supply tank 53. Preferably, the pressurized supply pump 531 can be a high-precision hydraulic flow drive pump of model LFE150 / 500a with adjustable flow rate and hydraulic pressure. More preferably, a liquid inlet is provided on the top of the pressurized supply tank 53, which is sealed with a cover when not adding liquid, thus facilitating the periodic addition of rust-removing agent solution. Preferably, a liquid level monitoring sensor is installed inside the pressurized supply tank 53 or a liquid level observation window is provided on its body, thereby facilitating the operator to observe the liquid level in the tank and manually add rust-removing agent when it is insufficient. Preferably, the bottom of the pressurized liquid supply tank 53 is provided with an output port, and a switch valve is fitted on the output port. The output port is sealed to the liquid guide pipe 522 through a flange structure, so that the operator can adjust the supply parameters of the pressurized liquid supply tank 53 according to the needs.

[0033] Preferably, a liquid flow agent concentration detection sensor is provided at the input end of the main flow guide 51. Specifically, the rust remover initially contains specific active additives. The concentration detection sensor can be a fluorescent tracer agent concentration sensor. This sensor can monitor the concentration of specific components, allowing operators to manually adjust the mixing amount of the rust remover over time. The mixing amount is adjusted by regulating the flow rate and pressure during injection, i.e., adjusting the power of the pump. The fluorescent tracer agent concentration sensor works by tracking the concentration of active ingredients using fluorescent labeling technology, suitable for rust removers containing additives. Output signal: Supports RS485 or 4-20mA for easy connection to a PLC system. Specifically, the concentration detection sensor can be an AMT / YJND-400 agent concentration sensor. Applicable scenarios: Real-time monitoring of circulating tank liquid and recovery liquid pipelines. Functions: Self-cleaning design, corrosion-resistant 316L stainless steel, directly outputs concentration percentage signal. The concentration detection sensor can also be a CZ-C series acidic solution sensor, characterized by: optimized for acidic environments such as rust removers, strong corrosion resistance, and a measurement range of 0-100%. Installation methods: Supports immersion or flow-through tank installation, compatible with rust removal tanks, and preferably installed in the chemical circulation pipeline to avoid direct contact with precipitated rust. Specifically, the above concentration detection sensor should be calibrated every 3-6 months; the calibration cycle should be shortened for high-temperature or corrosive environments. During use, when the sensor displays a concentration lower than the set value (e.g., 70% of the initial concentration), add chemical reagent at a ratio of 10% of the tank solution volume. This application uses AMT / YJND-400 or CZ-C series refractive sensors, which can be directly integrated into the circulation system. The automatic dosing equipment is linked via a 4-20mA signal. When the sensor detects the specific concentration data of the reflux solution, it feeds it back to the controller. The controller then automatically calculates the replenishment of rust remover and generates relevant instructions for replenishment. The PLC system is used to control the actual operating parameters of the pressurized supply pump 531, thereby adaptively injecting the agent to compensate for the concentration of the reflux solution.

[0034] Preferably, the top surface of the storage tank 6 is also provided with an injection port 62 for injecting a pre-prepared rust-removing solution of appropriate concentration into the circulation system. Preferably, a stirring structure is also provided inside the storage tank 6 to ensure that the concentration of the prepared rust-removing solution is uniform during the output process, avoiding the problem of separation of components in the solution due to settling. Preferably, an outlet pipe 63 is welded to the side of the storage tank 6 to input the prepared rust-removing solution into the soaking tank 1. Specifically, both ends of the outlet pipe 63 are inserted into the sides of the storage tank 6 and the soaking tank 1, and the pipe connection is sealed by welding. Specifically, a one-way flow valve is provided inside the outlet pipe 63 to allow only one-way flow of the solution into the soaking tank 1.

[0035] Preferably, the mixing assembly 5 and the storage tank 6 are mounted on one side of the soaking tank 1 via a suspended mounting frame to facilitate position adjustment and synchronous movement.

[0036] Preferably, the electrical components involved in this application, such as the backwash self-cleaning filter, pumping unit 223, pressurized supply pump 531, sensor, and stirring structure, are all electrically connected to the controller, PLC system, and power supply. The control method of this application is controlled by the controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the art. Furthermore, this utility model is only used to protect the mechanical device and its mechanical structural features. Therefore, this utility model will not explain the control method and circuit connection in detail.

[0037] For surface connections between components not explicitly specified in this application, conventional bolt connections, snap-fit ​​connections, or fixed connections such as welding can be used. As these are conventional connection methods, this application will not elaborate further on this part. Specifically, the connecting ends of the assembled components all form flange structures, and the two flange structures are connected by bolts, gaskets, or other structures.

[0038] This utility model is not limited to the above-described optional embodiments. Anyone can derive other various forms of products under the guidance of this utility model. However, regardless of any changes in shape or structure, any technical solution falling within the scope of the claims of this utility model is within the protection scope of this utility model. Those skilled in the art should understand that this utility model specification and its drawings are illustrative and do not constitute a limitation on the claims. The protection scope of this utility model is defined by the claims and their equivalents. Throughout the text, features introduced by "preferred" are merely optional and should not be construed as mandatory. Therefore, the applicant reserves the right to abandon or delete relevant preferred features at any time.

Claims

1. A workpiece rust pretreatment and cleaning device, comprising an immersion tank (1), characterized in that, A collection pipe (3) is provided at the bottom of the soaking tank (1) and can be connected to the filter recovery assembly (2). The output end of the recycled liquid of the filter recovery component (2) is connected to the mixing module (5) that can replenish the rust removal agent through the return infusion pipeline (4). The output end of the mixing module (5) is also connected to the storage tank (6), and the outlet of the storage tank (6) is connected to the soaking pool (1). The mixing module (5) is fitted with a filling ring (52) on the main guide pipe (51) in a circumferential multi-point filling manner for adding rust removal agent.

2. The workpiece rust pretreatment and cleaning equipment as described in claim 1, characterized in that, The main guide pipe (51) is provided with a coaxial partition column (511) that can separate multiple streams of rust-removing agent injected radially on the annular surface. The working position of the coaxial partition column (511) in the main guide pipe (511) is positioned by support rods (512) arranged at intervals around its column body. A turbulence turbine (513) is also provided inside the main flow guide (51). Multiple injection ports (514) are inserted into the annular wall of the main flow guide (51) in a rotationally symmetrical manner around its central axis.

3. The workpiece rust pretreatment and cleaning equipment as described in claim 2, characterized in that, The injection ring (52) includes a liquid guide ring (521), a liquid guide pipe (522), and an equal pressure valve (523), wherein, A liquid guide tube (522) capable of introducing rust remover is inserted into the outer ring surface of the liquid guide tube (521), and the equal pressure valve (523) is also inserted at intervals into the inner ring surface of the liquid guide tube (521).

4. The workpiece rust pretreatment and cleaning equipment as described in claim 3, characterized in that, The valve body (5231) of the equal pressure conducting valve (523) is provided with an opening baffle (5232) perpendicular to its axis and a cross support frame (5234). A sealing post (5235) is installed at the center intersection of the cross support frame (5234), and a connecting sleeve (5236) is movably fitted on the sealing post (5235). A pre-tightening spring (5237) is provided in the connecting sleeve (5236) to limit the insertion depth of the sealing post (5235). The end of the connecting sleeve (5236) away from the sealing post (5235) is also provided with a movable baffle (5233) that limits the movement of the sleeve against the surface of the opening partition (5232). An auxiliary guide rod (5238) is centrally located on the plate surface of the movable baffle (5233) away from the connecting sleeve (5236), and the auxiliary guide rod (5238) moves through the perforated partition (5232).

5. The workpiece rust pretreatment and cleaning equipment as described in claim 4, characterized in that, The inlet end of the liquid guide pipe (522) is also connected to a pressurized liquid supply tank (53) for supplying rust removal agent, and a pressurized supply pump (531) is installed inside the pressurized liquid supply tank (53).

6. The workpiece rust pretreatment and cleaning equipment as described in claim 5, characterized in that, The filtration and recovery assembly (2) is equipped with a sedimentation module (21) and a filtration module (22) to separate the rust removal solution into a recovered clear liquid by allowing it to settle and filter.

7. The workpiece rust pretreatment and cleaning equipment as described in claim 6, characterized in that, The input end of the settling module (21) is connected to the slag collection pipe (3) through the recovery pipe head (23). Multiple slow-flow inclined plates (212) are arranged alternately in the U-shaped tube (211) of the settling module (21), and a slag discharge port (213) is provided on the bottom sedimentation cavity of the U-shaped tube (211).

8. The workpiece rust pretreatment and cleaning equipment as described in claim 7, characterized in that, The filter module (22) includes a connecting elbow (221) fitted onto the output end of the U-shaped tube (211), and the output end of the connecting elbow (221) is connected to a filter (222), and the output end of the filter (222) is connected to the return infusion pipeline (4) through a storage tank (224) with a pumping unit (223).

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