An acid pickling tank
By designing a detachable filter screen structure and filtration channel in the pickling tank, the problems of frequent filter screen replacement and difficulty in recycling pickling liquid are solved, achieving efficient filtration and reuse, reducing waste liquid treatment costs, and improving the economy and environmental friendliness of the pickling process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG BAITONG ANTICORROSION EQUIP CO LTD
- Filing Date
- 2025-07-31
- Publication Date
- 2026-08-04
AI Technical Summary
After prolonged operation, the existing pickling tanks require frequent filter replacement and cleaning, which affects the filtration effect. Furthermore, the pickling solution is difficult to recycle and reuse, increasing the cost of waste liquid treatment.
A detachable filter structure was designed, which can be quickly fixed and unlocked through locking rails and connecting blocks in the filter channel. Combined with the filter channel, the pickling solution is pre-filtered, and the filter residue is concentrated on the outside of the channel, avoiding blockage in the tank. This improves the efficiency of filter replacement and cleaning, and extends the service life.
It significantly reduces maintenance difficulty, saves downtime, improves the reusability of acid, reduces waste liquid treatment costs, and enhances the economy and environmental friendliness of the pickling process.
Smart Images
Figure CN224591032U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to an acid pickling tank, belonging to the field of acid pickling equipment. Background Technology
[0002] A pickling tank is an industrial device used for metal surface treatment. It removes oxides, rust, welding slag, and other impurities from metal surfaces by immersing them in an acidic solution, thereby improving the adhesion and quality of subsequent processing (such as electroplating and spraying). It promotes the removal of stubborn oxide scale on metal surfaces, especially high-temperature oxide scale generated during hot rolling, annealing, and tempering, while preventing hydrogen embrittlement. In existing pickling tanks, under prolonged operation, the material flaking off the metal parts needs to be filtered, as does the pickling solution. Current filtration typically uses filter baskets, but the filter screens require timely replacement and cleaning, and the pickling solution needs to be recycled and reused. The filter baskets also need to be cleaned promptly to prevent affecting the cleaning effect. Utility Model Content
[0003] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide a pickling tank.
[0004] A pickling tank includes a tank body with a tank cover. One side of the tank body has a filter channel for filtering pickling solution. A filter screen detachably connected to the filter channel is located within the filter channel. The filter screen includes a fixing part on one side. One side of the filter channel has a fixing groove for fixed connection to the fixing part. The other side of the filter screen has an insertion groove. The filter channel has a connecting block that engages with the insertion groove. A locking rail is located within the insertion groove. The connecting block has a locking shaft for engaging with the locking rail to form a fixed connection. The filter screen, with its insertion groove and fixing part, can be securely fixed by engaging with the connecting block and locking shaft on the filter channel. When replacement or cleaning is required, simply loosening the locking shaft allows the filter screen to be quickly removed from the fixing groove, significantly reducing maintenance difficulty and saving downtime. By placing the filter screen within a dedicated filter channel, filter residue is concentrated on the outside of the channel, preventing clogging of the filter screen throughout the tank. The detachable design allows for timely replacement or cleaning of the filter screen, ensuring stable filtration efficiency during long-term operation and extending the service life of the filter screen and the pickling tank. The filtration channel pre-filters the pickling solution, removing large impurities before returning it to the tank. This reduces the burden on downstream processing equipment, improves the reusability of the acid solution, lowers wastewater treatment costs, and enhances the economy and environmental friendliness of the entire pickling process.
[0005] Preferably, the locking track includes a locking groove on the side wall, a first rotating wheel is rotatably connected to the connecting block, a second rotating wheel is fixedly connected to the first rotating wheel via a connecting rod, and a locking shaft is disposed on the second rotating wheel. The locking shaft engages with the locking groove to fix the connecting block and the filter screen. The engagement between the locking groove and the locking shaft, combined with the circumferential guide on the rotating wheel, ensures that the locking shaft is inserted at a constant angle and constant speed, resulting in precise locking. This ensures that the lock remains firmly in place and does not loosen under liquid flow impact or vibration conditions, guaranteeing that the filter screen does not shift or leak during the pickling process.
[0006] Furthermore, the first rotating wheel is provided with a first groove and a second groove, and the connecting block is provided with a hook. When the connecting block is connected to the filter screen, the hook locks into the first groove; when the connecting block is released from the filter screen, the hook connects to the second groove, used to lift the second rotating wheel and release the locking shaft from the locking groove. The cooperation between the first groove and the hook achieves a secure lock, while switching to the second groove automatically lifts the second rotating wheel, releasing the locking shaft from the locking groove. This dual-mode design requires no additional buttons or tools; simply moving the hook to different groove positions allows for quick switching between "locked" and "unlocked" modes, making operation intuitive and efficient.
[0007] Furthermore, the first groove is open, while the second groove is narrow. The open first groove facilitates the quick sliding of the hook, reducing initial alignment difficulties and allowing for rapid locking even in environments with limited visibility or hand vibration. The two different opening shapes create a clear difference in feel and insertion torque: a larger opening requires less insertion force, suitable for locking; a narrower opening requires more lifting force, suitable for unlocking, helping users intuitively distinguish between the two operating states through force and travel.
[0008] Furthermore, the inner wall of the first groove near the hook is vertical, which restricts the position of the hook. The vertical inner wall provides a clear stop surface for the hook, so that the hook can only slide into the predetermined position when locked, ensuring that the engagement height and angle of the locking shaft and the locking groove are always consistent, and improving the accuracy of the structural fit.
[0009] Furthermore, the locking track also includes an unlocking slot located on the innermost side. An inclined step is provided between the unlocking slot and the locking slot, allowing the second rotating wheel to drive the first rotating wheel to rotate, causing the hook to engage with the second groove. The inclined step converts the radial motion of the second rotating wheel into the rotation of the first rotating wheel. Utilizing the inherent mechanical transmission of the internal structure, the hook automatically slides into the second groove when switching from the locking slot to the unlocking slot without additional manual adjustment, simplifying the unlocking action. The unlocking slot and the locking slot are separated by the step; the first rotating wheel will only drive the hook into the second groove when the second rotating wheel moves accurately along the inclined step. Even if the rotating wheel vibrates due to accidental force, it will not mistakenly enter the unlocked state, improving operational safety.
[0010] Preferably, the connecting block extends into a filter channel and is connected to a handle. The extended handle allows the operator to perform locking and unlocking operations without approaching the tank, effectively avoiding occupational injuries caused by pickling solution splashes or the accumulation of harmful gases, and improving overall operational safety.
[0011] Furthermore, the outer wall of the filter channel is provided with a snap-fit groove, on which a protective cover covering the handle is snapped. The protective cover covers the outside of the handle and the connecting parts, which can effectively prevent pickling solution from splashing and metal shavings generated during the filtration process from escaping, reduce the direct contact between the operator and the corrosive medium, and improve the safety of operation.
[0012] Furthermore, the connecting block is fitted with a sealing ring that abuts against the filter screen. The sealing ring fits tightly against the filter screen, effectively preventing pickling solution from leaking around the edges of the filter screen and ensuring that all fluids are filtered through the filter screen, thus improving the overall filtration effect.
[0013] Preferably, the bottom of the tank is further provided with several sets of pads for placing under the metal parts during transport. The pads at the bottom of the tank protect the pickling tank from scratches or tears during metal part transport. The pads are typically made of materials with a certain degree of hardness, such as granite, which protects both the metal parts and the tank while reducing wear. This ensures that the pickling tank will not experience problems even after prolonged use, thus extending its service life.
[0014] The beneficial effects of this utility model are as follows: The filter screen is equipped with an insertion groove and a fixing part, which can be firmly fixed after being engaged with the connecting block and locking shaft on the filter channel; when replacement or cleaning is required, simply loosen the locking shaft to quickly remove the filter screen from the fixing groove, significantly reducing maintenance difficulty and saving downtime. By placing the filter screen in a dedicated filter channel, the filter residue is concentrated on the outside of the channel, avoiding clogging of the filter screen in the entire tank; the detachable design allows the filter screen to be replaced or cleaned in a timely manner, ensuring stable filtration efficiency during long-term operation and extending the service life of the filter screen body and the pickling tank. The filter channel pre-filters the pickling solution, removing large impurities before returning it to the tank, reducing the burden on downstream treatment equipment, improving the reusability of acid, reducing waste liquid treatment costs, and enhancing the economy and environmental friendliness of the entire pickling process. Attached Figure Description
[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.
[0016] Figure 1 This is a schematic diagram of the structure of this utility model;
[0017] Figure 2 This is a cross-sectional structural diagram of the present invention;
[0018] Figure 3 This is a magnified view of the details at point A;
[0019] Figure 4 This is a schematic diagram of the connecting block structure;
[0020] In the diagram, 1. Tank body; 11. Filter channel; 12. Fixing groove; 13. Snap-fit groove; 14. Protective cover; 15. Sealing ring; 2. Filter screen; 21. Fixing part; 22. Insertion groove; 23. Locking track; 24. Unlocking groove; 25. Step; 26. Locking groove; 3. Connecting block; 31. Hook; 32. First rotating wheel; 33. Connecting rod; 34. First groove; 35. Second groove; 36. Second rotating wheel; 37. Locking shaft; 38. Handle; 4. Tank cover; 5. Pad. Detailed Implementation
[0021] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.
[0022] It should be noted that all uses of "first" and "second" in the embodiments of this utility model are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of this utility model. Subsequent embodiments will not explain this in detail.
[0023] The directional and positional terms used in this utility model, such as "up," "down," "front," "back," "left," "right," "inner," "outer," "top," "bottom," and "side," are merely for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.
[0024] like Figures 1-4 The illustration shows an embodiment of an acid pickling tank according to this utility model. It includes a tank body 1 with a tank cover 4. A filter channel 11 for filtering pickling solution is provided on one side of the tank body 1. A filter screen 2 detachably connected to the filter channel 11 is provided within the filter channel 11. The filter screen 2 includes a fixing part 21 on one side. A fixing groove 12 fixedly connected to the fixing part 21 is provided on one side of the filter channel 11. An insertion groove 22 is provided on the other side of the filter screen 2. A connecting block 3 that engages with the insertion groove 22 is provided on the filter channel 11. A locking rail 23 is provided within the insertion groove 22. A locking shaft 37 for engaging with the locking rail 23 to form a fixed connection is provided on the connecting block 3 and locking shaft 37 on the connecting block 3 of the filter channel 11. The filter screen 2, with its insertion groove 22 and fixing part 21, can be securely fixed after engaging with the connecting block 3 and locking shaft 37 on the filter channel 11. When replacement or cleaning is required, the filter screen 2 can be quickly removed from the fixing groove 12 simply by loosening the locking shaft 37, significantly reducing maintenance difficulty and saving downtime. By placing the filter screen 2 within a dedicated filtration channel 11, filter residue is concentrated on the outside of the channel, preventing clogging of the filter screen within the entire tank 1. The detachable design allows for timely replacement or cleaning of the filter screen, ensuring stable filtration efficiency during long-term operation and extending the service life of both the filter screen 2 and the pickling tank. The filtration channel 11 pre-filters the pickling solution, removing large impurities before returning it to the tank 1, reducing the burden on downstream processing equipment, increasing the reusability of the acid solution, lowering wastewater treatment costs, and enhancing the economic and environmental benefits of the entire pickling process.
[0025] The locking track 23 includes a locking groove 26 on the side wall. A first rotating wheel 32 is rotatably connected to the connecting block 3. The first rotating wheel 32 is fixedly connected to a second rotating wheel 36 via a connecting rod 33. The locking shaft 37 is located on the second rotating wheel 36. The locking shaft 37 engages with the locking groove 26 to fix the connecting block 3 to the filter screen 2. The engagement between the locking groove 26 and the locking shaft 37, combined with the circumferential guide on the rotating wheel, ensures that the locking shaft 37 is inserted at a constant angle and constant speed, resulting in precise locking. This ensures that the filter screen remains firmly in place and does not loosen, regardless of liquid flow impact or vibration, thus preventing displacement and leakage during the pickling process.
[0026] The first rotating wheel 32 has a first groove 34 and a second groove 35. The connecting block 3 has a hook 31. When the connecting block 3 is connected to the filter screen 2, the hook 31 is locked to the first groove 34. When the connecting block 3 is unlocked from the filter screen 2, the hook 31 is connected to the second groove 35, which is used to lift the second rotating wheel to release the locking shaft 37 from the locking groove 26. The cooperation between the first groove 34 and the hook 31 achieves a stable lock, while switching to the second groove 35 can automatically lift the second rotating wheel 36, releasing the locking shaft 37 from the locking groove 26. This dual-mode design requires no additional buttons or tools. Simply move the hook 31 to different groove positions to quickly switch between "locked" and "unlocked" modes. The operation is intuitive and efficient.
[0027] The first groove 34 is open, and the second groove 35 is narrow. The open first groove 34 facilitates the quick sliding of the hook 31, reducing the difficulty of initial alignment. Even in environments with limited vision or hand vibration, the locking action can be completed quickly. The two different opening shapes create a clear difference in feel and insertion torque: a large opening requires less insertion force and is suitable for locking; a narrow opening requires more lifting force and is suitable for unlocking. This helps users intuitively distinguish between the two operating states through force and travel.
[0028] The inner wall of the first groove 34 near the hook 31 is vertical, which is used to limit the position of the hook 31. The vertical inner wall provides a clear stop surface for the hook 31, so that the hook 31 can only slide into the predetermined position when locked, ensuring that the engagement height and angle between the locking shaft 37 and the locking groove 26 are always consistent, and improving the accuracy of the structural engagement.
[0029] The locking track 23 also includes an unlocking slot 24 located on the innermost side. An inclined step 25 is provided between the unlocking slot 24 and the locking slot 26, allowing the second rotating wheel 36 to drive the first rotating wheel 32 to rotate via the step 25, causing the hook 31 to engage with the second groove 35. The inclined step 25 converts the radial movement of the second rotating wheel 36 into the rotation of the first rotating wheel 32. Utilizing the inherent mechanical transmission of the internal structure, the hook 31 automatically slides into the second groove 35 when switching from the locking slot 26 to the unlocking slot 24 without additional manual adjustment, simplifying the unlocking action. The unlocking slot 24 and the locking slot 26 are separated by the step 25. Only when the second rotating wheel 36 moves accurately along the inclined step 25 will the first rotating wheel 32 drive the hook 31 into the second groove 35. Even if the rotating wheel vibrates due to accidental force, it will not accidentally enter the unlocked state, improving operational safety.
[0030] The connecting block 3 extends into a filter channel 11 and is connected to a handle 38. The extended handle 38 allows the operator to perform locking and unlocking operations without approaching the tank body 1, effectively avoiding occupational injuries caused by splashing pickling solution or accumulation of harmful gases, and improving overall operational safety.
[0031] The outer wall of the filter channel 11 is provided with a snap-fit groove 13, on which a protective cover 14 covering the outside of the handle 38 is snapped. The protective cover 14 covers the outside of the handle 38 and the connecting parts, which can effectively prevent the splashing of pickling solution and the escape of metal shavings generated during the filtration process, reduce the direct contact between the operator and the corrosive medium, and improve the safety of operation.
[0032] The connecting block 3 is fitted with a sealing ring 15 that abuts against the filter screen 2. The sealing ring 15 fits tightly against the filter screen 2, effectively preventing pickling liquid from leaking around the edge of the filter screen 2, ensuring that all fluids are filtered by the filter screen 2, and improving the overall filtration effect.
[0033] The bottom of the tank 1 is also equipped with several sets of pads 5 for placing under the metal parts during transport. These pads protect the pickling tank from scratches or tears during metal part transport. The pads are typically made of hard materials such as granite, which protects both the metal parts and the tank, reduces wear, and ensures long-term durability, thus extending the service life of the pickling tank.
[0034] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.
[0035] Although the present invention has been described with reference to several specific embodiments, it should be understood that the present invention is not limited to the specific embodiments disclosed. The present invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims
1. An acid wash tank characterized by: The device includes a tank body with a tank cover. One side of the tank body has a filter channel for filtering pickling solution. The filter channel contains a filter screen that is detachably connected to the filter channel. The filter screen includes a fixing part on one side. One side of the filter channel has a fixing groove that is fixedly connected to the fixing part. The other side of the filter screen has an insertion groove. The filter channel has a connecting block that engages with the insertion groove. The insertion groove contains a locking rail. The connecting block has a locking shaft that engages with the locking rail to form a fixed connection.
2. The pickling tank of claim 1, wherein: The locking track includes a locking groove on the side wall, a first rotating wheel is rotatably connected to the connecting block, a second rotating wheel is fixedly connected to the first rotating wheel via a connecting rod, the locking shaft is located on the second rotating wheel, and the locking shaft engages with the locking groove to fix the connecting block to the filter screen.
3. The pickling tank of claim 2, wherein: The first rotating wheel is provided with a first groove and a second groove, and the connecting block is provided with a hook. When the connecting block is connected to the filter screen, the hook is locked to the first groove. When the connecting block is unlocked from the filter screen, the hook is connected to the second groove, which is used to lift the second rotating wheel to release the locking shaft from the locking groove.
4. The pickling tank of claim 3, wherein: The first groove is open, and the second groove is narrow.
5. The pickling tank of claim 4, wherein: The inner wall of the first groove near the hook is vertical, which is used to limit the position of the hook.
6. The pickling tank of claim 2, wherein: The locking track also includes an unlocking groove located on the innermost side. An inclined step is provided between the unlocking groove and the locking groove, which is used by the second rotating wheel to drive the first rotating wheel to rotate so that the hook engages with the second groove.
7. The pickling tank of claim 1, wherein: The connecting block extends into a filter channel and is connected to a handle.
8. The pickling tank of claim 7, wherein: The outer wall of the filter channel is provided with a snap-fit groove, and a protective cover covering the outside of the handle is snapped into the snap-fit groove.
9. The pickling tank of claim 8, wherein: The connecting block is fitted with a sealing ring that abuts against the filter screen.
10. The pickling tank as described in claim 1, characterized in that: The bottom of the trough is also provided with several sets of pads for placing on the bottom of the metal parts when conveying them.