Seamless steel tube pickling device

Abstract

The utility model discloses a seamless steel pipe pickling device, and aims to solve the problem that waste residues after pickling are accumulated in a pickling tank, and subsequent cleaning is troublesome. According to the technical scheme, the seamless steel pipe pickling device is characterized by comprising a pickling box and a residue filtering box which are arranged up and down, a guide-out pipe is arranged between the bottom of the pickling box and the top of the residue filtering box, a control valve is arranged on the guide-out pipe, and a first rectangular frame is slidably connected to the upper end of the interior of the residue filtering box; a through groove allowing the first rectangular frame to slide out is formed in one side of the residue filtering box, and a fixing plate matched with the through groove is arranged on one side of the first rectangular frame. According to the seamless steel pipe pickling device, waste liquid obtained after pickling is guided into the residue filtering box, waste residues are intercepted through the filter screen, pickling liquid with the waste residues filtered out is pumped into the pickling box by the water suction pump to be reused, the filter frame for fixing the filter screen can be pulled out along with the first rectangular frame and the second rectangular frame, and the filter frame freely rotates after being limited, so that the waste residues are removed, and the pickling effect is good. And waste residues on the filter screen are convenient to clean.

Description

Technical Field

[0001] The utility model relates to the technical field of steel pipe processing, and more specifically, it relates to an acid pickling device for seamless steel pipes. Background Art

[0002] The acid pickling of seamless steel pipes is a chemical treatment method aimed at removing impurities such as rust, scale, and oil stains on the surface of seamless steel pipes to improve the surface quality and processing performance of seamless steel pipes. Its main principle is to utilize the chemical reaction between the acid solution and metal oxides to dissolve and remove the oxides and rust on the metal surface. Sulfuric acid, hydrochloric acid and other acidic solutions are usually used as pickling solutions for steel pipes.

[0003] During the acid pickling process of steel pipes, the waste residue after acid pickling will accumulate in the pickling tank, and it is more troublesome to clean up later. Therefore, it is necessary to propose an acid pickling device for seamless steel pipes to solve the above problems. Summary of the Utility Model

[0004] Aiming at the deficiencies of the existing technology, the purpose of the utility model is to provide an acid pickling device for seamless steel pipes. The waste liquid after acid pickling is introduced into the filter residue box, the waste residue is intercepted by the filter screen, and the pickling solution filtered out of the waste residue is pumped by a water pump to the pickling box for reuse. The filter frame fixing the filter screen can be pulled out with the first rectangular frame and the second rectangular frame, and the filter frame rotates freely after the limit is released, which is convenient for cleaning the waste residue on the filter screen.

[0005] The above technical purpose of the utility model is achieved by the following technical solutions: an acid pickling device for seamless steel pipes, including a pickling box and a filter residue box arranged up and down. A lead-out pipe is arranged between the bottom of the pickling box and the top of the filter residue box, and a control valve is arranged on the lead-out pipe. The upper end inside the filter residue box is slidably connected with a first rectangular frame. A through groove for the first rectangular frame to slide out is arranged on one side of the filter residue box. A fixing plate adapted to the through groove is arranged on one side of the first rectangular frame. A second rectangular frame is fixedly connected to the inside of the first rectangular frame. A rotating shaft is rotatably connected to the middle of the second rectangular frame. A filter frame is fixedly arranged on the rotating shaft. The outer wall of the filter frame fits with the inner wall of the second rectangular frame. A filter screen is arranged in the filter frame. It also includes a first limiting part for preventing the first rectangular frame from separating from the filter residue box and a second limiting part for restricting the relative rotation of the filter frame with respect to the second rectangular frame. The lower end of the filter residue box is connected with a return pipe in a communicating way, the other end of the return pipe is communicated with the pickling box, and a water pump is arranged on the return pipe.

[0006] The utility model is further arranged as follows: the first limiting part includes a limiting block arranged on the top of the filter residue box. The limiting block is located on the side close to the through groove. A limiting groove for the limiting block to slide is arranged on the second rectangular frame. When the second rectangular frame is completely pulled out, the limiting block abuts against the end of the limiting groove.

[0007] The present utility model is further configured as follows: the second limiting portion includes a bolt inserted through the second rectangular frame, a slot for inserting the bolt is provided on the filter frame, a pull ring is provided at the end of the bolt, and a sunk groove for accommodating the pull ring is provided on the outer wall of the second rectangular frame.

[0008] The present utility model is further configured as follows: a chamfer is provided at one end of the bolt close to the slot.

[0009] The present utility model is further configured as follows: sliding strips are symmetrically provided on both inner walls of the filter residue box, and sliding grooves slidably matched with the sliding strips are provided on the outer wall of the first rectangular frame.

[0010] The present utility model is further configured as follows: the sliding strip has an I-shaped structure, and the sliding groove has a shape adapted to the sliding strip.

[0011] The present utility model is further configured as follows: the bottom of the pickling tank has a conical structure.

[0012] The present utility model is further configured as follows: a handle is provided on the fixing plate.

[0013] In summary, the present utility model has the following beneficial effects:

[0014] The pickling device discharges the pickling waste liquid into the filter residue box, intercepts the waste residue through the filter screen, and the pickling solution filtered from the waste residue is pumped by a water pump into the pickling tank for reuse. The filter frame for fixing the filter screen can be pulled out along with the first rectangular frame and the second rectangular frame, and the filter frame rotates freely after the limit is released, which is convenient for cleaning the waste residue on the filter screen, thereby realizing the recycling of the pickling solution, saving energy, and facilitating the cleaning of the waste residue. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural view of the pickling device of the present utility model Figure 1 ;

[0016] Figure 2 is a schematic structural view of the pickling device of the present utility model Figure 2 ;

[0017] Figure 3 is Figure 2 an enlarged schematic view of part A of

[0018] Figure 4 is a schematic structural view of the second rectangular frame, the filter frame, the bolt and the slot of the present utility model.

[0019] In the figure: 1, pickling tank; 2, filter residue tank; 3, outlet pipe; 4, control valve; 5, first rectangular frame; 6, through slot; 7, fixing plate; 8, second rectangular frame; 9, rotating shaft; 10, filter frame; 11, filter screen; 12, return pipe; 13, water pump; 14, limit block; 15, limit slot; 16, sliding strip; 17, sliding groove; 18, bolt; 19, slot; 20, pull ring; 21, sunk groove; 22, handle. Detailed implementation manners

[0020] In order to enable those skilled in the art to better understand the technical solution of the present utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

[0021] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "top / bottom end", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0022] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "provided with", "sheathed / connected", "connected", etc. should be understood in a broad sense. For example, "connected" may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0023] The present utility model will be described in detail below with reference to the accompanying drawings.

[0024] Referring to Figures 1 - 4 , a seamless steel pipe pickling device, including a pickling tank 1 and a filter residue tank 2 arranged up and down. An outlet pipe 3 is fixedly installed between the bottom of the pickling tank 1 and the top of the filter residue tank 2. A control valve 4 is fixedly installed on the outlet pipe 3. The upper end inside the filter residue tank 2 is slidably connected with a first rectangular frame 5. A through slot 6 for the first rectangular frame 5 to slide out is opened on one side of the filter residue tank 2. A fixing plate 7 adapted to the through slot 6 is fixedly provided on one side of the first rectangular frame 5;

[0025] The inner side of the first rectangular frame 5 is fixedly connected with a second rectangular frame 8. A rotating shaft 9 is rotatably connected to the middle of the second rectangular frame 8. A filter frame 10 is fixedly arranged on the rotating shaft 9. The outer wall of the filter frame 10 is in fit with the inner wall of the second rectangular frame 8. A filter screen 11 is arranged in the filter frame 10. It can be understood that in order to enable the filter frame 10 to rotate smoothly, the two ends of the filter frame 10 for rotation are in arc-shaped structures, which can not only make the filter frame 10 fit with the second rectangular frame 8 to place waste residues leaking down, but also prevent the filter frame 10 from interfering with the second rectangular frame 8 when the filter frame 10 rotates;

[0026] It further includes a first limiting part for preventing the first rectangular frame 5 from separating from the filter residue box 2 and a second limiting part for restricting the relative rotation of the filter frame 10 with respect to the second rectangular frame 8. A return pipe 12 is communicated and arranged at the lower end of the filter residue box 2. The other end of the return pipe 12 is communicated with the pickling tank 1. A water pump 13 is fixedly installed on the return pipe 12.

[0027] The first limiting part includes a limiting block 14 fixedly arranged at the top of the filter residue box 2. The limiting block 14 is located on one side close to the through groove 6. A limiting groove 15 for the limiting block 14 to slide is formed on the second rectangular frame 8. When the second rectangular frame 8 is completely pulled out, the limiting block 14 abuts against the end of the limiting groove 15. By limiting the second rectangular frame 8, the first rectangular frame 5 is prevented from separating from the filter residue box 2.

[0028] The second limiting part includes a bolt 18 inserted through the second rectangular frame 8. A slot 19 for the bolt 18 to insert is formed on the filter frame 10. A pull ring 20 is fixedly arranged at the end of the bolt 18. A sunk groove 21 for accommodating the pull ring 20 is formed on the outer wall of the second rectangular frame 8. By pulling and inserting the bolt 18, the second rectangular frame 8 is limited, and the method is simple and fast; and a chamfer is arranged at one end of the bolt 18 close to the slot 19. Through the arranged chamfer for guiding, the bolt 18 can be quickly and smoothly inserted into the slot 19.

[0029] Sliding strips 16 are symmetrically and fixedly arranged on the inner walls on both sides of the filter residue box 2. A sliding groove 17 in sliding fit with the sliding strips 16 is fixedly arranged on the outer wall of the first rectangular frame 5. And the sliding strips 16 are in an I-shaped structure, and the sliding groove 17 is in a shape adapted to the sliding strips 16, so as to increase the contact area between the sliding strips 16 and the sliding groove 17 and further enhance the stability of the sliding process.

[0030] The bottom of the pickling tank 1 is in a conical structure, which is beneficial to the rapid and complete flow of the waste liquid in the pickling tank 1 to the filter residue box 2.

[0031] A handle 22 is fixedly arranged on the fixing plate 7. By arranging the handle 22, it is convenient to pull out the filter frame 10, and it is more convenient and labor-saving to use.

[0032] Working principle: When this pickling device is in use, after the steel pipe is pickled in the pickling tank 1, the control valve 4 is controlled to open the outlet pipe 3, and the waste water in the pickling tank 1 enters the filter residue tank 2. The filter screen 11 intercepts the waste residue. The outlet pipe 3 is closed, and the water pump 13 is turned on. The pickling solution filtered from the waste residue is pumped into the pickling tank 1 by the water pump 13 for reuse. After filtering for a period of time, too much waste residue will accumulate on the filter screen 11. The first rectangular frame 5 is pulled out, and the second rectangular frame 8 is disengaged from the limit of the filter frame 10, so that the filter frame 10 can rotate freely around the rotating shaft 9. The inclination of the filter frame 10 is convenient for cleaning the waste residue on the filter screen 11, thereby realizing the recycling of the pickling solution, saving energy, and facilitating the cleaning of the waste residue.

[0033] For the control valve 4 and the water pump 13 of the present utility model, they are both controlled and cooperated through electrical connection with the controller. The control circuit of the controller can be realized by simple programming by those skilled in the art. The provision of power supply also belongs to the common knowledge in this field. And the present utility model is mainly used to protect mechanical devices, so the control method and circuit connection of the present utility model will not be explained in detail.

[0034] The above is only the preferred embodiment of the present utility model. The protection scope of the present utility model is not limited to the above embodiments. All technical solutions falling within the idea of the present utility model belong to the protection scope of the present utility model. It should be noted that for those of ordinary skill in the art in this technical field, several improvements and refinements made without departing from the principle of the present utility model should also be regarded as the protection scope of the present utility model.

Claims

1. A seamless steel pipe pickling device, characterized in that: The invention comprises a pickling box (1) and a filter residue box (2) arranged in a vertical direction, a guide pipe (3) is arranged between the bottom of the pickling box (1) and the top of the filter residue box (2), a control valve (4) is arranged on the guide pipe (3), a first rectangular frame (5) is slidably connected to the upper end of the inner part of the filter residue box (2), a through groove (6) for the first rectangular frame (5) to slide out is provided on one side of the filter residue box (2), a fixing plate (7) adapted to the through groove (6) is provided on one side of the first rectangular frame (5), a second rectangular frame (8) is fixedly connected to the inner side of the first rectangular frame (5), and the middle part of the second rectangular frame (8) is provided with a through groove (6) for the first rectangular frame (5) to slide out. A rotating shaft (9) is rotatably connected, a filter frame (10) is fixedly provided on the rotating shaft (9), the outer wall of the filter frame (10) is in contact with the inner wall of the second rectangular frame (8), a filter screen (11) is arranged inside the filter frame (10), and the filter frame (10) further comprises a first limiting portion for preventing the first rectangular frame (5) from separating from the filter residue box (2) and a second limiting portion for limiting the rotation of the filter frame (10) relative to the second rectangular frame (8), a return pipe (12) is provided at the lower end of the filter residue box (2), the other end of the return pipe (12) is connected to the pickling box (1), and a water pump (13) is provided on the return pipe (12).

2. A seamless steel pipe pickling device according to claim 1, characterized in that: The first limiting portion comprises a limiting block (14) arranged on the top of the filter residue box (2), the limiting block (14) being located on a side close to the through groove (6), and the second rectangular frame (8) is provided with a limiting groove (15) for the limiting block (14) to slide, and when the second rectangular frame (8) is fully pulled out, the limiting block (14) abuts against the end of the limiting groove (15).

3. A seamless steel pipe pickling device according to claim 1, characterized in that: The second limiting portion comprises a latch (18) inserted into the second rectangular frame (8); a slot (19) for inserting the latch (18) is provided on the filter frame (10); a pull ring (20) is provided at the end of the latch (18); and a recess (21) for accommodating the pull ring (20) is provided on the outer wall of the second rectangular frame (8).

4. A seamless steel pipe pickling device according to claim 3, characterized in that: One end of the latch pin (18) close to the slot (19) is provided with a chamfer.

5. A seamless steel pipe pickling device according to claim 1, characterized in that: Slide bars (16) are symmetrically arranged on the inner walls of both sides of the filter residue box (2), and a slide groove (17) slidably matched with the slide bar (16) is arranged on the outer wall of the first rectangular frame (5).

6. A seamless steel pipe pickling device according to claim 5, characterized in that: The slide bar (16) is in an I-shaped structure, and the slide groove (17) is in a shape corresponding to the slide bar (16).

7. A seamless steel pipe pickling device according to claim 1, characterized in that: The bottom of the pickling box (1) is a conical structure.

8. A seamless steel pipe pickling device according to claim 1, characterized in that: The fixing plate (7) is provided with a handle (22).

Images