Pickling internal circulation device for stainless steel seamless steel pipe

Abstract

The utility model provides a stainless steel seamless steel pipe pickling internal circulation device which comprises a pickling tank, a mounting bracket arranged above the pickling tank and a steel pipe limiting frame capable of being immersed in the pickling tank, the steel pipe limiting frame is connected to the telescopic end of a lifting air cylinder, and the lifting air cylinder penetrates through a transverse through groove formed in the mounting bracket; the end of the pickling tank is fixed to a movable frame, the movable frame is slidably mounted on the mounting support, a pneumatic push rod is arranged at one side end of the movable frame, a pickling solution cavity is formed in one side in the pickling tank, a through groove matched with a steel pipe is formed in one side face of the pickling solution cavity, a circulating pipe is arranged on the outer side of the pickling solution cavity, and one end of the circulating pipe communicates with a tank body of the pickling tank. And the other end of the circulating pipe is communicated with the pickling solution cavity, and a circulating pump is mounted on the circulating pipe. The contact effect of acid liquor and the pipe wall is improved, the acid pickling effect and the acid pickling efficiency are further improved, and meanwhile the acid pickling effect on the outer wall of the steel pipe is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pickling devices, in particular to an internal circulation device for pickling stainless steel seamless steel pipes. Background Technique

[0002] Pickling is an essential process in the production of seamless steel pipes. It uses acid solutions to remove the scale and rust on the inner and outer surfaces of the steel pipes, so that subsequent processing operations can be better completed and better-quality steel pipe products can be obtained. Conventionally, pickling seamless steel pipes is simply to lift and place the steel pipes into the pickling tank and soak and pickle them by adding acid solution into the pickling tank. Since the steel pipes are slender, when there is a large amount of rust in the steel pipes, because the pickling time cannot be too long, and at the same time, the acid solution inside the steel pipes is difficult to convect and exchange with the external acid solution, thus affecting the pickling effect inside the steel pipes.

[0003] Therefore, how to provide an internal circulation device for pickling steel pipes is an urgent problem to be solved by those skilled in the art. Content of the Utility Model

[0004] The purpose of the utility model is to provide an internal circulation device for pickling stainless steel seamless steel pipes to solve the problems raised in the above background technique.

[0005] To solve the above technical problems, the utility model provides the following technical solution: An internal circulation device for pickling stainless steel seamless steel pipes, including a pickling tank, a mounting bracket arranged above the pickling tank, and a steel pipe limiting frame that can be immersed in the pickling tank. The steel pipe limiting frame is connected to the telescopic end of a lifting cylinder. The lifting cylinder passes through a transverse through groove arranged on the mounting bracket, and its end is fixed on the moving frame. The moving frame is slidably installed on the mounting bracket, and a pneumatic push rod is arranged at one side end of the moving frame. One side inside the pickling tank is provided with an acid solution chamber. One side surface of the acid solution chamber is provided with a through groove adapted to the steel pipe, and a circulation pipe is arranged outside it. One end of the circulation pipe is communicated with the tank body of the pickling tank, and the other end is communicated with the acid solution chamber. A circulation pump is installed on the circulation pipe.

[0006] Guide rails are respectively arranged on both sides opposite to the transverse through groove, and the moving frame is slidably installed on the guide rails.

[0007] The cross section of the through groove is a structure in which a large-diameter groove and a small-diameter groove are communicated with each other.

[0008] An acid liquid filter is installed on the circulation pipe.

[0009] Compared with the prior art, the beneficial effects achieved by the utility model are as follows: The utility model uses a pneumatic push rod to push one end of the steel pipe on the steel pipe limiting frame into the through groove adapted to the steel pipe, and then starts the circulation pump to pump the pickling solution into the pickling solution chamber until it is full. Under the strong pressure generated by the continuous input of the pickling solution, the pickling solution continuously passes through the steel pipe through the through groove, so that the pickling solution forms a circulating flushing in the pickling tank, improving the contact effect between the acid solution and the pipe wall, further improving the pickling effect and pickling efficiency, and at the same time improving the pickling effect on the outer wall of the steel pipe; The circulating pipe of the utility model is equipped with an acid solution filter, which can filter out large pieces of rust that are not completely corroded in the acid solution, collect the rust, prevent a large amount of rust from entering the pickling tank again during the circulation of the acid solution and affecting the subsequent pickling effect, and effectively improve the quality of the acid solution in the acid solution circulation during the acidification treatment of stainless steel pipes. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The drawings are used to provide a further understanding of the present utility model and form a part of the specification. In the drawings:

[0011] Figure 1 is a schematic structural diagram of the present utility model;

[0012] Figure 2 is a top view of the mounting bracket of the present utility model;

[0013] Figure 3 is Figure 1 an enlarged view of part A in

[0014] Figure 4 is a state diagram of the present utility model;

[0015] In the figure: 1 pickling tank; 2 mounting bracket; 3 steel pipe limiting frame; 4 lifting cylinder; 5 transverse through groove; 6 moving frame; 7 pneumatic push rod; 8 pickling solution chamber; 9 steel pipe; 10 through groove; 11 circulating pipe; 12 circulating pump; 13 guide rail; 14 acid solution filter. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to 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.

[0017] Please refer to Figures 1-3, the present utility model provides a technical solution: a pickling internal circulation device for stainless steel seamless steel pipes, including a pickling tank 1, a mounting bracket 2 arranged above the pickling tank 1, and a steel pipe limiting frame 3 that can be immersed in the pickling tank 1. The steel pipe limiting frame 3 is connected to the telescopic end of a lifting cylinder 4. The lifting cylinder 4 passes through a transverse through groove 5 arranged on the mounting bracket 3, and its end is fixed on the moving frame 6. The moving frame 6 is slidably mounted on the mounting bracket 2, and a pneumatic push rod 7 is arranged at one side end thereof. On one side inside the pickling tank 1, there is an acid cleaning solution chamber 8. One side surface of the acid cleaning solution chamber 8 is provided with a through groove 10 adapted to the steel pipe 9, and a circulation pipe 11 is arranged outside it. One end of the circulation pipe 11 is communicated with the tank body of the pickling tank 1, and the other end is communicated with the acid cleaning solution chamber 8. A circulation pump 12 is installed on the circulation pipe 11.

[0018] Guide rails 13 are respectively arranged on two opposite sides of the transverse through groove 5. The moving frame 6 is slidably mounted on the guide rails 13.

[0019] The cross-section of the through groove 10 is a structure in which a large-diameter groove and a small-diameter groove are interconnected.

[0020] An acid solution filter 14 is installed on the circulation pipe 11;

[0021] The working principle of the present utility model: As Figure 4 shown, one end of the steel pipe 9 on the steel pipe limiting frame 3 is pushed by the pneumatic push rod 7 into the through groove 10 adapted to the steel pipe 9. Then, the circulation pump 12 is started to pump the acid cleaning solution into the acid cleaning solution chamber 8 until the acid cleaning solution is full. Under the strong pressure generated by the continuous input of the acid cleaning solution, the acid cleaning solution continuously passes through the steel pipe 9 from the through groove 10, so that the acid cleaning solution forms a circulating rinse in the pickling tank 1, improving the contact effect between the acid solution and the pipe wall, further improving the pickling effect and pickling efficiency, and at the same time improving the pickling effect on the outer wall of the steel pipe 9. The acid solution filter 14 can filter large pieces of rust that are not completely corroded in the acid solution, collect the rust, prevent a large amount of rust from entering the pickling tank again during the circulation of the acid solution and affecting the subsequent pickling effect, and effectively improve the quality of the acid solution during the acid solution circulation in the acidification treatment of stainless steel pipes.

[0022] It should be noted that relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0023] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A stainless steel seamless steel pipe pickling internal circulation device, comprising a pickling tank, a mounting bracket arranged above the pickling tank and a steel pipe limit frame that can be immersed in the pickling tank, the steel pipe limit frame is connected to the telescopic end of the lifting cylinder, characterized in that: The lifting cylinder passes through a transverse through groove arranged on the mounting bracket, and an end portion thereof is fixed on a movable frame, the movable frame is slidably mounted on the mounting bracket, and a pneumatic push rod is arranged on one side end thereof, a pickling liquid cavity is arranged on one side of the pickling tank, a through groove matched with a steel pipe is arranged on one side of the pickling liquid cavity, and a circulation pipe is arranged on the outside thereof, one end of the circulation pipe is connected with the tank body of the pickling tank, and the other end is connected with the pickling liquid cavity, and a circulation pump is installed on the circulation pipe.

2. The pickling internal circulation device for stainless steel seamless pipe according to claim 1, characterized in that: Guide rails are respectively arranged on opposite sides of the transverse through slot, and the movable frame is slidably mounted on the guide rails.

3. The pickling internal circulation device for stainless steel seamless pipe according to claim 1, characterized in that: The cross section of the through groove is a structure in which a large diameter groove and a small diameter groove are interconnected.

4. The pickling internal circulation device for stainless steel seamless pipe according to claim 1, characterized in that: The circulation pipe is equipped with an acid filter.

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