Valve casting pickling device

Abstract

The utility model relates to the field of valve casting, and discloses a valve casting pickling device which comprises a pickling tank, a drain pipe is arranged on the side wall of the pickling tank, a pickling structure is arranged on the surface of the pickling tank, the pickling structure comprises a motor, the output end of the motor is fixedly connected with a rotating shaft, and the rotating shaft is connected with the pickling tank. Stirring blades are fixedly connected to the outer wall of the rotating shaft, a sieve plate is arranged in the pickling tank, a lifting assembly is arranged on the surface of the pickling tank, a filtering assembly is arranged on the surface of the pickling tank, the outer wall of the motor is fixedly connected with the outer wall of the pickling tank, and the outer wall of the sieve plate is matched with the inner wall of the pickling tank. The lifting assembly comprises a connecting rod, the top end of the connecting rod is fixedly connected with a lifting plate, and the bottom of the lifting plate is fixedly connected with an electric push rod. According to the acid pickling device, the acid pickling structure is arranged, so that the replacement frequency of acid pickling liquid caused by impurity accumulation is reduced, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of valve casting, in particular to an acid pickling device for valve castings. Background Art

[0002] During the casting process of valve castings, an oxide skin or other impurities will form on the metal surface. Acid pickling can effectively remove these oxide skins and expose the original surface of the metal. Acid pickling can remove impurities and impurities on the surface of the castings, reduce surface roughness, improve the surface quality of the castings, and provide a good foundation for subsequent processes such as machining, painting, or heat treatment. The oxides and impurities on the surface of the castings may become the starting point of corrosion. By removing these substances through acid pickling, the risk of corrosion can be reduced and the service life of the valve castings can be extended.

[0003] After retrieval, Chinese Patent Publication No.: CN215050713U discloses an acid pickling device for marine valve castings. By setting a first motor, a push rod, and a screw, the slider is pushed to the left to compress the telescopic spring. The valve casting is placed between the slider and the right clamping plate. After releasing the slider, the telescopic spring returns to clamp the valve casting. The screw is turned to contact the slider for fixation. The push rod is operated to enter the acid pickling tank downward, and the first motor is started to drive the valve casting to clean back and forth left and right to prevent oxides from accumulating inside the valve casting.

[0004] In the above technical solution, structures such as a motor, a push rod, and a screw are used to clean the valve back and forth to prevent oxides from accumulating inside the valve casting. However, when acid pickling the valve casting, impurities will gradually peel off from the surface of the valve casting. If the impurities cannot be removed in time, it will lead to the risk of the valve casting being scratched or worn by the impurities during the acid pickling process, thereby reducing the surface quality of the casting. Therefore, an acid pickling device for valve castings is proposed to solve the above problems. Summary of the Utility Model

[0005] In order to make up for the above deficiencies, the utility model provides an acid pickling device for valve castings, aiming to improve the problem that the acid pickling device for valve castings in the prior art cannot remove the impurities generated during the acid pickling process in time, resulting in the contact between the impurities and the surface of the valve casting, thereby reducing the surface quality of the casting.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme: an acid pickling device for valve castings, including an acid pickling tank, a drain pipe is provided on the side wall of the acid pickling tank, an acid pickling structure is arranged on the surface of the acid pickling tank, the acid pickling structure includes a motor, the output end of the motor is fixedly connected with a rotating shaft, a stirring blade is fixedly connected to the outer wall of the rotating shaft, a sieve plate is arranged inside the acid pickling tank, a lifting component is arranged on the surface of the acid pickling tank, and a filtering component is arranged on the surface of the acid pickling tank.

[0007] As a further description of the above technical solution:

[0008] A fixing seat is fixedly connected to the top of the sieve plate. A connecting groove is formed on the upper surface of the fixing seat, and a rotating ring is threadedly connected to the inner wall of the connecting groove.

[0009] As a further description of the above technical solution:

[0010] The outer wall of the motor is fixedly connected to the outer wall of the pickling tank, and the outer wall of the sieve plate is adapted to the inner wall of the pickling tank.

[0011] As a further description of the above technical solution:

[0012] The lifting assembly includes a connecting rod. The top of the connecting rod is fixedly connected to a lifting plate. The bottom of the lifting plate is fixedly connected to an electric push rod, and the fixed end of the electric push rod is fixedly connected to a mounting plate.

[0013] As a further description of the above technical solution:

[0014] The filtering assembly includes a fixing plate. The top of the fixing plate is fixedly connected to a liquid extraction pump. The output end of the liquid extraction pump is fixedly connected to a transmission pipe. A filter impurity box is fixedly connected to the outer wall of the transmission pipe. A filter screen is inserted into the inner wall of the filter impurity box. A return pipe is fixedly connected to the inner wall of the filter impurity box, and a one-way valve is arranged on the surface of the return pipe.

[0015] As a further description of the above technical solution:

[0016] The outer wall of the connecting rod is threadedly connected to the inner wall of the rotating ring, and the side wall of the mounting plate is fixedly connected to the outer wall of the pickling tank.

[0017] As a further description of the above technical solution:

[0018] The outer wall of the fixing plate is fixedly connected to the outer wall of the pickling tank, and the side wall of the filter impurity box is fixedly connected to the outer wall of the pickling tank.

[0019] As a further description of the above technical solution:

[0020] One end of the return pipe away from the filter impurity box penetrates into the interior of the pickling tank.

[0021] The utility model has the following beneficial effects:

[0022] 1. In the present utility model, by providing a motor, a rotating shaft, and stirring blades, the pickling solution can be agitated to facilitate better contact between the pickling solution and the valve castings placed on the surface of the sieve plate. The filtering component filters the impurities in the pickling solution and then returns them to the pickling tank again. The lifting component facilitates the lifting of the sieve plate to pick up and place the valve castings, reducing the influence on the cleanliness and pickling effect of the pickling solution caused by the contact between the impurities removed by pickling and the valve castings, reducing the replacement frequency of the pickling solution due to impurity accumulation, and reducing costs.

[0023] 2. In the present utility model, by providing a fixed seat, a connection groove, and a rotating ring, it is convenient to quickly disassemble and assemble the sieve plate, facilitating the cleaning of the sieve plate, avoiding the accumulation of dirt and water scale during long-term use, and ensuring the quality of the pickling solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a front view schematic diagram of the main structure of a valve casting pickling device proposed by the present utility model;

[0025] Figure 2 is a rear view schematic diagram of the main structure of a valve casting pickling device proposed by the present utility model;

[0026] Figure 3 is a separated top view schematic diagram of the main structure of a valve casting pickling device proposed by the present utility model;

[0027] Figure 4 is a Figure 3 magnified schematic diagram of area A in a valve casting pickling device proposed by the present utility model.

[0028] LEGEND DESCRIPTION:

[0029] 1. Pickling tank; 2. Drain pipe; 3. Motor; 4. Rotating shaft; 5. Stirring blade; 6. Sieve plate; 7. Fixed plate; 8. Liquid extraction pump; 9. Transmission pipe; 10. Impurity filtering box; 11. Filter screen; 12. Return pipe; 13. Check valve; 14. Installation plate; 15. Electric push rod; 16. Lifting plate; 17. Connecting rod; 18. Fixed seat; 19. Connection groove; 20. Rotating ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0031] Refer to Figures 1 - 3, an embodiment provided by the present utility model: a pickling device for valve castings, including a pickling tank 1. The inside of the pickling tank 1 is used to place pickling solution. A drain pipe 2 is provided on the side wall of the pickling tank 1. A pickling structure is arranged on the surface of the pickling tank 1. The pickling structure includes a motor 3. The output end of the motor 3 is fixedly connected with a rotating shaft 4. Stirring blades 5 are fixedly connected to the outer wall of the rotating shaft 4. There are several groups of stirring blades 5, and several groups of stirring blades 5 are distributed in a circumferential array with the center point of the rotating shaft 4 as the axis of symmetry. The stirring blades 5 can stir the pickling solution. A sieve plate 6 is arranged inside the pickling tank 1. The surface of the sieve plate 6 is provided with equally spaced sieve holes. A lifting component is arranged on the surface of the pickling tank 1. A filtering component is arranged on the surface of the pickling tank 1.

[0032] Refer to Figures 2 - 4 , the outer wall of the motor 3 is fixedly connected with the outer wall of the pickling tank 1. The outer wall of the sieve plate 6 is adapted to the inner wall of the pickling tank 1. The surface of the sieve plate 6 is used to place valve castings. The lifting component includes a connecting rod 17. The connecting rod 17 is inserted into the pickling tank 1 through the pushing or pulling of an electric push rod 15 to contact the pickling solution. The outer wall of the connecting rod 17 is threadedly connected with the inner wall of a rotating ring 20. The top of the connecting rod 17 is fixedly connected with a lifting plate 16. The bottom of the lifting plate 16 is fixedly connected with an electric push rod 15. The fixed end of the electric push rod 15 is fixedly connected with a mounting plate 14. The side wall of the mounting plate 14 is fixedly connected with the outer wall of the pickling tank 1. There are two groups of lifting components, and the two groups of lifting components are arranged in a mirror image with the central axis of the pickling tank 1 as the axis of symmetry. The filtering component includes a fixing plate 7. The outer wall of the fixing plate 7 is fixedly connected with the outer wall of the pickling tank 1. A liquid extraction pump 8 is fixedly connected to the top of the fixing plate 7. The input end of the liquid extraction pump 8 is connected with a pipeline, and the pipeline penetrates into the pickling tank 1. The output end of the liquid extraction pump 8 is fixedly connected with a transmission pipe 9. A filter impurity box 10 is fixedly connected to the outer wall of the transmission pipe 9. The side wall of the filter impurity box 10 is fixedly connected with the outer wall of the pickling tank 1. A filter screen 11 is inserted into the inner wall of the filter impurity box 10. The filter screen 11 filters the impurities contained in the pickling solution. A return pipe 12 is fixedly connected to the inner wall of the filter impurity box 10. A one-way valve 13 is arranged on the surface of the return pipe 12. When the one-way valve 13 is opened, the return pipe 12 can transmit the pickling solution inside the filter impurity box 10 to the inside of the pickling tank 1, and prevent the pickling solution inside the pickling tank 1 from flowing into the filter impurity box 10. One end of the return pipe 12 far from the filter impurity box 10 penetrates into the pickling tank 1.

[0033] Refer to Figures 2 - 4 , a fixing seat 18 is fixedly connected to the top of the sieve plate 6. A connecting groove 19 is provided on the upper surface of the fixing seat 18. The inner wall of the connecting groove 19 is threadedly connected with a rotating ring 20. Reverse the rotating ring 20 so that the rotating ring 20 moves upward on the surface of the connecting rod 17 after moving away from the inside of the connecting groove 19.

[0034] Working principle: Place the valve casting on the surface of the sieve plate 6. At the same time, start two groups of electric push rods 15. The two groups of electric push rods 15 drive the lifting plate 16 to descend, and through the connecting rod 17, the sieve plate 6 is completely immersed in the pickling solution for pickling. Then, turn on the motor 3. The motor 3 drives the rotating shaft 4 to rotate, so that the stirring blades 5 agitate the pickling solution. The flowing pickling solution in the pickling tank 1 can carry away the impurities on the surface of the valve casting. After the stirring blades 5 agitate for a period of time, turn off the motor 3. The pickling solution gradually stops, and the impurities will fall to the bottom of the tank through the sieve holes on the sieve plate 6 due to gravity. At this time, the liquid extraction pump 8 pumps the pickling solution inside the pickling tank 1. The pickling solution enters the impurity filtering box 10 through the transmission pipe 9. After the filter screen 11 filters the impurities in the pickling solution, the pickling solution flows back into the pickling tank 1 again through the return pipe 12 to contact the valve casting, so as to remove the suspended matter and impurities in the pickling solution and reduce the influence on the cleanliness and pickling effect of the pickling solution due to more impurities. When the pickling tank 1 has been performing pickling operations for a long time, use the electric push rod 15 to completely take out the sieve plate 6 from the pickling tank 1, and rotate the rotating ring 20 in the reverse direction until the rotating ring 20 disengages from the connecting groove 19, so as to facilitate the removal of the sieve plate 6 and reduce the problem that the pickling quality is affected by the accumulated dirt and scale due to long-term use.

[0035] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An acid pickling device for valve castings, comprising an acid pickling tank (1), and a liquid discharge pipe (2) is provided on the side wall of the acid pickling tank (1), characterized in that: The surface of the pickling tank (1) is provided with a pickling structure, the pickling structure includes a motor (3), the output end of the motor (3) is fixedly connected with a rotating shaft (4), the outer wall of the rotating shaft (4) is fixedly connected with stirring blades (5), a sieve plate (6) is arranged inside the pickling tank (1), a lifting component is arranged on the surface of the pickling tank (1), and a filtering component is arranged on the surface of the pickling tank (1).

2. The pickling device for a valve casting according to claim 1, characterized in that: A fixing seat (18) is fixedly connected to the top of the sieve plate (6), a connecting groove (19) is formed on the upper surface of the fixing seat (18), and a rotating ring (20) is threadedly connected to the inner wall of the connecting groove (19).

3. The pickling device for a valve casting according to claim 1, wherein: The outer wall of the motor (3) is fixedly connected to the outer wall of the pickling tank (1), and the outer wall of the sieve plate (6) is adapted to the inner wall of the pickling tank (1).

4. The pickling device for a valve casting according to claim 1, characterized in that: The lifting component includes a connecting rod (17), the top of the connecting rod (17) is fixedly connected with a lifting plate (16), the bottom of the lifting plate (16) is fixedly connected with an electric push rod (15), and the fixed end of the electric push rod (15) is fixedly connected with a mounting plate (14).

5. The pickling device for a valve casting according to claim 1, characterized in that: The filtering component includes a fixing plate (7), a liquid extraction pump (8) is fixedly connected to the top of the fixing plate (7), the output end of the liquid extraction pump (8) is fixedly connected with a transmission pipe (9), a filter impurity box (10) is fixedly connected to the outer wall of the transmission pipe (9), a filter net (11) is inserted into the inner wall of the filter impurity box (10), a return pipe (12) is fixedly connected to the inner wall of the filter impurity box (10), and a one-way valve (13) is arranged on the surface of the return pipe (12).

6. The pickling device for a valve casting according to claim 4, wherein: The outer wall of the connecting rod (17) is threadedly connected to the inner wall of the rotating ring (20), and the side wall of the mounting plate (14) is fixedly connected to the outer wall of the pickling tank (1).

7. An acid pickling device for a valve casting according to claim 5, characterized in that: The outer wall of the fixing plate (7) is fixedly connected to the outer wall of the pickling tank (1), and the side wall of the filter impurity box (10) is fixedly connected to the outer wall of the pickling tank (1).

8. An acid pickling device for a valve casting according to claim 5, characterized in that: One end of the return pipe (12) far away from the filter impurity box (10) penetrates into the inside of the pickling tank (1).

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