Circulating filtering device of pickling tank

Abstract

The utility model discloses a circulating filtering device for a pickling tank, which comprises a tank body with an opening at the top, a filter cartridge is arranged outside the tank body, a liquid pumping pipe and a return pipe are connected between the filter cartridge and the tank body, a circulating pump is arranged on the liquid pumping pipe, and a filtering piece for filtering impurities is arranged inside the filter cartridge. The pickling solution in the pool body is pumped into the filter cartridge through the circulating pump, the pickling solution is filtered in a classified mode through the filter plate in the filter cartridge, impurities difficult to ablate in the pickling solution are removed, the pickling solution is purer, and the pickling efficiency of the pickling solution on the metal pipe fitting is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of rust removal of metal pipe fittings, in particular to a circulating filtering device for a pickling tank. Background Art

[0002] Metal pipes are common in special scenarios such as fluid transportation, refrigerant systems, and circuits. After production and processing, these metal pipes will be piled up in warehouses waiting to be sold and used. During long-term storage, a large amount of rust will form on the metal pipes. Therefore, the rust on the surface of the metal pipes needs to be cleaned, galvanized, and treated with other anti-rust treatments every once in a while. The existing method of rust removal for metal pipes is mostly to immerse them in a pickling tank for acid rust removal.

[0003] The existing pickling tank lacks a circulating filtration system, so there are the following problems during pickling and rust removal: due to the large volume of the pickling tank, the pickling liquid is not easy to filter and replace frequently. After the pickling liquid is repeatedly used, a large amount of solid impurities that are difficult to corrode will be suspended in the pickling liquid. These solid impurities adhere to the surface of the metal pipe fittings, affecting the pickling effect, such as sand and other particles adhering to the surface of the metal pipe fittings. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a pickling tank circulating filtration device to solve the problems that the pickling liquid in the existing pickling tank is difficult to filter and replace, resulting in excessive impurities in the pickling liquid and affecting the pickling effect.

[0005] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] A circulating filtration device for a pickling tank comprises a tank body with an opening at the top, a filter cartridge is arranged outside the tank body, a liquid extraction pipe and a return pipe are connected between the filter cartridge and the tank body, a circulating pump is arranged on the liquid extraction pipe, and a filter element for filtering impurities is arranged inside the filter cartridge.

[0007] Preferably, the top of the filter cartridge is sealed with a top cover, one end of the liquid extraction tube is connected to the bottom of the pool body, and the other end of the liquid extraction tube is connected to the top cover.

[0008] By setting the top cover, it is convenient to open the filter cartridge from the top, which is convenient for taking and placing the filter element. By connecting the two ends of the liquid extraction tube to the bottom of the pool body and the center point of the top cover respectively, since the density mass of the insoluble particles is mostly greater than the density mass of the pickling liquid, the content of the insoluble particles at the bottom of the pool body is the largest. This arrangement makes it easy to extract the pickling liquid at the bottom of the pool body into the filter cartridge for filtration, thereby improving the filtration effect of the pickling liquid.

[0009] Preferably, a horizontal buffer plate is provided at the inner bottom of the top cover, and the buffer plate is located directly below the end of the liquid extraction tube.

[0010] When the pickling liquid is pumped by the circulation pump and enters the filter cartridge from the suction pipe, there is a large impact force. By setting a buffer plate under the suction pipe, the impact force of the pickling liquid can be reduced by the buffer plate, avoiding the pickling liquid from directly impacting the filter plate and extending the service life of the filter plate.

[0011] Preferably, a gathering bucket is provided at the inner bottom of the filter cartridge, and a partition plate inclined to one side is provided at the top of the gathering bucket.

[0012] Preferably, one end of the return pipe is connected to the top edge of the pool body, and the other end of the return pipe is connected to the filter cartridge, and the connecting portion between the return pipe and the filter cartridge is located above the higher end of the partition plate.

[0013] By setting up a gathering bucket, the fine particles that pass through the filter plate can be gathered on the bottom plate of the filter cartridge. By setting up a partition plate, the fine particles can be isolated under the partition plate. When the reflux pipe refluxes the filtered pickling liquid, the number of fine particles returning to the tank body can be reduced.

[0014] Preferably, the inner wall of the filter cartridge is provided with a horizontal positioning ring, and the filter element is clamped above the positioning ring.

[0015] The filter element can be fixed in a limited position by providing a positioning ring, so as to prevent the filter element from being difficult to remove from the bottom of the filter cartridge.

[0016] Preferably, the filter element comprises a cylindrical support frame corresponding to the positioning ring, a plurality of filter plates arranged at equal distances are arranged in the support frame, and a plurality of filter holes are formed on the filter plates.

[0017] As a preferred embodiment, the pore size of the filter holes on each layer of filter plates is different, and the pore size of the filter holes decreases from top to bottom. In this way, the pickling liquid is filtered in multiple stages by setting up multiple filter plates, and insoluble particles of different diameters are filtered out respectively, thereby improving the filtering effect.

[0018] Preferably, a water outlet is provided at the bottom of the reflux pipe, a first control valve is installed at the water outlet, and a second control valve is provided at a portion of the reflux pipe close to the pool body.

[0019] A water outlet is arranged at the bottom of the reflux pipe, and the opening and closing of the water outlet is controlled by the first control valve. When the water outlet is opened, the pickling liquid in the pool body can be discharged and replaced. The opening and closing of the reflux pipe is controlled by the second control valve, so as to conveniently control whether the pickling liquid flows back into the pool body.

[0020] Preferably, a cleaning pipe is provided at the bottom of the filter cartridge, and a third control valve is provided on the cleaning pipe.

[0021] A third control valve is arranged at the bottom of the filter cartridge to facilitate the discharge of impurities that have fallen into the bottom of the filter cartridge.

[0022] Preferably, an observation window is provided on the outer side of the filter cartridge.

[0023] The observation window is provided to facilitate the observation of the filtering condition in the filter cartridge at all times. When too many impurities are filtered out in the filter cartridge, the filter element can be removed and cleaned in time.

[0024] The utility model provides a pickling tank circulating filtration device, which has the following beneficial effects:

[0025] The utility model uses a circulation pump to extract the pickling liquid in the pool into the filter cartridge, and performs graded filtration on the pickling liquid through the filter plate in the filter cartridge to remove impurities that are difficult to dissolve in the pickling liquid, making the pickling liquid purer and improving the pickling efficiency of the pickling liquid for metal pipe fittings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the overall structure of a pickling tank circulation filtration device of the utility model;

[0027] Figure 2 This is a schematic diagram of the structure of a filter cartridge in a circulating filter device for a pickling tank according to the utility model;

[0028] Figure 3 This is a schematic diagram of the internal structure of a filter cartridge in a circulating filter device for a pickling tank according to the utility model;

[0029] Figure 4 The utility model is a schematic diagram of the structure of a filter element in a circulating filter device of a pickling tank.

[0030] In the figure:

[0031] 1. Pool body; 2. Filter cartridge; 201. Top cover; 3. Filter element; 301. Support frame; 302. Filter plate; 4. Liquid extraction pipe; 5. Buffer plate; 6. Reflux pipe; 7. Circulation pump; 8. Partition plate; 9. Collection bucket; 10. First control valve; 11. Second control valve; 12. Positioning ring; 13. Third control valve; 14. Observation window. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0033] See also Figure 1-4 The utility model provides a circulating filtering device for a pickling tank, aiming to solve the problem that the pickling liquid in the existing pickling tank is difficult to filter and replace, resulting in excessive impurities in the pickling liquid, thus affecting the pickling effect.

[0034] Structurally, the pickling tank circulation filtration device of the utility model mainly includes a tank body 1 with a top opening, a filter cartridge 2, a liquid extraction pipe 4 and a return pipe 6. Among them, the filter cartridge 2 is arranged outside the tank body 1, the liquid extraction pipe 4 and the return pipe 6 are connected between the filter cartridge 2 and the tank body 1, the liquid extraction pipe 4 is provided with a circulation pump 7, and the filter cartridge 2 is provided inside with a filter element 3 for filtering impurities.

[0035] In this embodiment, the top of the filter cartridge 2 is sealed with a top cover 201, one end of the liquid extraction tube 4 is connected to the bottom of the tank body 1, and the other end of the liquid extraction tube 4 is connected to the top cover 201. By providing the top cover 201, it is convenient to open the filter cartridge 2 from the top, to take and place the filter element 3, and to clean the particle impurities filtered by the filter element 3. By connecting the two ends of the liquid extraction tube 4 to the bottom of the tank body 1 and the center point of the top cover 201 respectively, since the density mass of the insoluble particles is mostly greater than the density mass of the pickling liquid, the insoluble particles at the bottom of the tank body 1 contain the most. Such a configuration facilitates the extraction of the pickling liquid at the bottom of the tank body 1 into the filter cartridge 2 for filtration, thereby improving the filtering effect of the pickling liquid.

[0036] In this embodiment, a horizontal buffer plate 5 is provided at the inner bottom of the top cover 201, and the buffer plate 5 is located directly below the end of the liquid extraction pipe 4. When the pickling liquid enters the interior of the filter cartridge 2 from the liquid extraction pipe 4 under the extraction of the circulating pump 7, there is a large impact force. By providing the buffer plate 5 below the liquid extraction pipe 4, the buffer plate 5 is used to reduce the impact force of the pickling liquid, and the pickling liquid is prevented from directly impacting the filter plate 302, thereby extending the service life of the filter plate 302. A gathering bucket 9 is provided at the inner bottom of the filter cartridge 2, and a partition plate 8 inclined to one side is provided at the top of the gathering bucket 9. One end of the reflux pipe 6 is connected to the top edge of the pool body 1, and the other end of the reflux pipe 6 is connected to the filter cartridge 2, and the connecting portion between the reflux pipe 6 and the filter cartridge 2 is located above the higher end of the partition plate 8. By setting up the gathering bucket 9, the fine particles that pass through the filter plate 302 can be gathered at the bottom of the filter tube 2. By setting up the partition plate 8, the fine particles can be isolated under the partition plate 8. When the reflux pipe 6 refluxes the filtered pickling liquid, the amount of fine particles returning to the pool body 1 can be reduced.

[0037] In this embodiment, the inner wall of the filter cartridge 2 is provided with a horizontal positioning ring 12, and the filter element 3 is stuck above the positioning ring 12. By providing the positioning ring 12, the filter element 3 can be limited and fixed, so as to prevent the filter element 3 from sliding on the bottom of the filter cartridge 2 and being difficult to remove. The filter element 3 includes a cylindrical support frame 301 corresponding to the positioning ring 12, and a plurality of equidistantly arranged filter plates 302 are provided in the support frame 301, and a plurality of filter holes are provided on the filter plate 302. As a preferred embodiment, the aperture of the filter holes on each layer of the filter plate 302 is different, and the aperture of the filter holes decreases from top to bottom. In this way, by providing a plurality of filter plates 302, the pickling liquid is subjected to multi-stage filtration, and insoluble particles of different diameters are filtered out respectively, thereby improving the filtering effect.

[0038] In this embodiment, a water outlet is provided at the bottom of the reflux pipe 6, a first control valve 10 is installed at the water outlet, and a second control valve 11 is provided at the part of the reflux pipe 6 close to the tank body 1. A water outlet is provided at the bottom of the reflux pipe 6, and the opening and closing of the water outlet is controlled by the first control valve 10. When the water outlet is opened, the pickling liquid in the tank body 1 can be discharged and replaced, and the opening and closing of the reflux pipe 6 is controlled by the second control valve 11, so as to conveniently control whether the pickling liquid flows back into the tank body 1. A cleaning pipe is provided at the bottom of the filter cartridge 2, and a third control valve 13 is provided on the cleaning pipe. The third control valve 13 is provided at the bottom of the filter cartridge 2 to facilitate the discharge of impurities that fall from the filter element 3 into the bottom of the filter cartridge 2.

[0039] In this embodiment, an observation window 14 is provided on the outside of the filter cartridge 2. The observation window 14 is provided to facilitate the observation of the filtering condition in the filter cartridge 2 at all times. When too many impurities are filtered out in the filter cartridge 2, the filter element 3 can be removed and cleaned in time.

[0040] As a preferred embodiment, in the present invention, except for the pool body 1 which is a cement structure, the other parts are all made of corrosion-resistant materials such as stainless steel.

[0041] The circulating filter device of the utility model is an additional component of the pickling tank. Its working process in the pickling process of metal pipe fittings is as follows:

[0042] First, during the pickling process of pipe fittings, as the number of pickled pipe fittings increases, the pickling liquid inside the tank body 1 contains a large number of insoluble particles, and it is necessary to start the circulation, close the first control valve 10 and the third control valve 13, open the second control valve 11, start the circulation pump 7, and draw the pickling liquid in the tank body 1 into the filter cartridge 2. The pickling liquid is graded and filtered using the multi-layer filter plate 302 to remove the insoluble particles in the pickling liquid. The filtered pickling liquid flows back to the tank body 1 through the reflux pipe 6 to complete the circulation filtration of the pickling liquid;

[0043] Second, when the pickling liquid in the tank body 1 needs to be replaced, close the second control valve 11 and the third control valve 13, connect the water outlet at the bottom of the reflux pipe 6 to the external pipeline, and draw the pickling liquid in the tank body 1 into the filter cartridge 2 and then discharge it from the water outlet;

[0044] Third, when it is necessary to clean the filter cartridge 2, close the first control valve 10 and the second control valve 11, open the third control valve 13, and discharge the fine particles accumulated at the bottom of the filter cartridge 2 through the third control valve 13. At the same time, open the top cover 201, take out the filter element 3 and clean the particulate impurities filtered out of the filter element 3.

[0045] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pickling tank circulation filtration device, comprising a tank body (1) with an opening at the top, characterized in that: A filter cartridge (2) is arranged outside the pool body (1), a liquid extraction pipe (4) and a return pipe (6) are connected between the filter cartridge (2) and the pool body (1), a circulation pump (7) is arranged on the liquid extraction pipe (4), and a filter element (3) for filtering impurities is arranged inside the filter cartridge (2).

2. A pickling tank circulation filtration device according to claim 1, characterized in that: The top of the filter cartridge (2) is sealed with a top cover (201), one end of the liquid extraction tube (4) is connected to the bottom of the pool body (1), and the other end of the liquid extraction tube (4) is connected to the top cover (201).

3. A pickling tank circulation filtration device according to claim 2, characterized in that: A horizontal buffer plate (5) is provided at the inner bottom of the top cover (201), and the buffer plate (5) is located directly below the end of the liquid extraction tube (4).

4. A pickling tank circulation filtration device according to claim 1, characterized in that: The inner bottom of the filter cylinder (2) is provided with a gathering bucket (9), and the top of the gathering bucket (9) is provided with a partition plate (8) inclined to one side.

5. A pickling tank circulation filtration device according to claim 4, characterized in that: One end of the return pipe (6) is in communication with the top edge of the pool body (1), and the other end of the return pipe (6) is in communication with the filter cartridge (2), and the connecting portion between the return pipe (6) and the filter cartridge (2) is located above the higher end of the partition plate (8).

6. A pickling tank circulation filtration device according to claim 1, characterized in that: The inner wall of the filter cartridge (2) is provided with a horizontal positioning ring (12), and the filter element (3) is clamped above the positioning ring (12).

7. A pickling tank circulation filtration device according to claim 6, characterized in that: The filter element (3) comprises a cylindrical support frame (301) corresponding to the positioning ring (12), a plurality of filter plates (302) arranged at equal distances are arranged in the support frame (301), and a plurality of filter holes are opened on the filter plates (302).

8. The pickling tank circulation filtration device according to claim 1, characterized in that: A water outlet is provided at the bottom of the reflux pipe (6), a first control valve (10) is installed at the water outlet, and a second control valve (11) is provided at a portion of the reflux pipe (6) close to the pool body (1).

9. A pickling tank circulation filtration device according to claim 1, characterized in that: A cleaning pipe is provided at the bottom of the filter cartridge (2), and a third control valve (13) is provided on the cleaning pipe.

10. The pickling tank circulation filtration device according to claim 1, characterized in that: An observation window (14) is provided on the outer side of the filter cartridge (2).

Images