Stainless steel tube pickling device

Abstract

A stainless steel pipe pickling device comprises a pickling tank, a steel pipe conveying belt and a driving assembly used for driving the steel pipe conveying belt to act, and a pickling bath with a conical opening is formed in the middle of the top of the pickling tank and used for feeding guiding of stainless steel pipes. The pickling tank is symmetrically provided with a motor placing groove and a notch for placing the steel pipe conveying belt on the left side and the right side of the pickling tank by taking the central axis of the pickling tank as a symmetry axis, the motor placing groove is provided with a driving assembly, an output shaft of the driving assembly is connected with a driving shaft of the upper belt wheel, and the steel pipe conveying belt is arranged on the upper belt wheel and the lower belt wheel in a sleeving manner; the lower belt wheel is mounted on the rotating shaft; a plurality of arc grooves are formed in the outward surfaces of the steel pipe conveying belts, and the arc grooves of the left steel pipe conveying belt and the right steel pipe conveying belt are matched to form stations for arranging stainless steel pipes at intervals. The pickling device improves the pickling effect and ensures the pickling quality of the stainless steel pipe.

Description

Technical Field

[0001] The utility model belongs to the technical field of pickling equipment, and in particular relates to a stainless steel pipe pickling device. Background Art

[0002] Stainless steel pipe is a type of steel pipe without joints and is commonly used as a pipeline for conveying fluids such as oil, natural gas, and coal gas. During the production process, stainless steel pipes need to undergo a pickling step to remove surface oxides and other impurities, improving their surface quality and corrosion resistance.

[0003] In the prior art, the method for pickling stainless steel pipes is usually to place them in bundles and soak them in a pickling tank for a period of time. However, this method has the following significant problems:

[0004] 1. The solution in the pickling tank will precipitate over time, resulting in a lower concentration of pickling solution on the surface of the tank, thus affecting the pickling effect. Especially for stainless steel pipes with high quality requirements, secondary pickling is often required. However, the existing pickling equipment is not easy to carry and operate, which increases the complexity and inconvenience of the production process and thus affects production efficiency.

[0005] 2. Since stainless steel pipes are usually placed in the pickling tank in bundles during the pickling process, the bundles of steel pipes will contact each other, resulting in the pickling liquid in some positions unable to be fully immersed, resulting in uneven pickling and affecting the pickling quality of various parts of the stainless steel pipes.

[0006] Therefore, in view of these problems existing in the prior art, it is necessary to propose a stainless steel pipe pickling device to improve the pickling effect and ensure the pickling quality of the stainless steel pipe. Summary of the Invention

[0007] In order to overcome the deficiencies of the prior art, the utility model provides a stainless steel pipe pickling device to improve the pickling effect and ensure the pickling quality of the stainless steel pipe.

[0008] The technical solution adopted by the utility model to solve its technical problems is:

[0009] A stainless steel pipe pickling device comprises a pickling tank, a steel pipe conveyor belt and a driving assembly for driving the steel pipe conveyor belt. A pickling tank with a conical opening is opened in the middle of the top of the pickling tank for guiding the loading of stainless steel pipes. The pickling tank is symmetrically provided with motor mounting grooves and notches for mounting the steel pipe conveyor belt on the left and right sides of the pickling tank with the central axis of the pickling tank as the symmetry axis. The motor mounting groove is provided with a driving assembly. The output shaft of the driving assembly is connected to the driving shaft of the upper pulley. The steel pipe conveyor belt is sleeved on the upper pulley and the lower pulley, and the lower pulley is installed on the rotating shaft; a plurality of arc grooves are provided on the outward surface of the steel pipe conveyor belt, and the arc grooves of the left and right steel pipe conveyor belts cooperate to form a work station for arranging stainless steel pipes at intervals.

[0010] Furthermore, drive assemblies are provided at both the front and rear ends of the motor mounting slot. The stainless steel pipe pickling device includes two sets of steel pipe conveyor belts, each set of which includes two left and right steel pipe conveyor belts. The drive assembly at the front end is in driving connection with the front set of steel pipe conveyor belts, while the drive assembly at the rear end is in driving connection with the rear set of steel pipe conveyor belts. Of course, if the steel pipes are longer, a third drive assembly can be provided in the middle, thereby providing another set of steel pipe conveyor belts in the middle.

[0011] Preferably, the driving assembly includes a worm gear reduction motor, which is composed of a motor and a worm gear reducer, and the output shaft of the motor is connected to the driving shaft of the upper pulley.

[0012] A circular through hole for connecting the acid discharge pipe is opened at the bottom end of the left side of the pickling tank, and a circular through hole for connecting the acid inlet pipe is opened at the top end of the right side of the pickling tank.

[0013] Preferably, the bottom plane of the pickling tank is inclined toward the acid discharge port and is stepped.

[0014] The motor placement groove is provided with a circular through hole on the side close to the steel pipe conveyor belt for installing the drive shaft. A partition is provided above the motor placement groove for isolating the pickling liquid and acid mist to avoid damage to the electrical equipment in the motor placement groove.

[0015] The partition is provided with a conical opening in the middle of the pickling tank, and two circular through holes are symmetrically provided on both sides of the partition with the central axis of the opening as the symmetry line. The partition is fixedly installed above the pickling tank, and the conical surface of the partition is coplanar with the conical surface of the central opening of the pickling tank.

[0016] More preferably, an acid mist processor is provided in the middle of the motor mounting groove, and the top of the acid mist processor is fixedly connected to an exhaust pipe. The exhaust pipe is arranged to pass through the circular through hole of the partition concentrically, and the opening directions of the two exhaust pipes are opposite, so as to efficiently extract the acid mist and prevent the acid mist from overflowing outside the device.

[0017] The technical concept of the present invention is as follows: when in use, multiple stainless steel pipes are placed at the opening of the pickling tank, and then the worm gear reduction motor is started to drive two pairs of steel pipe conveyor belts to rotate synchronously, so that the stainless steel pipes are arranged at intervals in the pickling tank, and there is no contact between the steel pipes, thereby improving the pickling efficiency. In addition, the worm gear reduction motor drives the two pairs of steel pipe conveyor belts to rotate forward and reverse periodically, so that the stainless steel pipes move up and down in the pickling tank, so that all parts of the stainless steel pipes can fully contact with the pickling liquid, and at the same time can stir the pickling liquid in the pickling tank, so that the pickling liquid has good fluidity, avoids stratification of the pickling liquid, and can further achieve full contact between the pickling liquid and the stainless steel pipe, thereby achieving the effect of further improving the pickling quality of the stainless steel pipe.

[0018] The beneficial effects of the utility model are mainly manifested in: improving the pickling effect and ensuring the pickling quality of the stainless steel pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a top view of the stainless steel pipe pickling device of the utility model with the partition plate and the acid tank cover removed;

[0020] Figure 2 This is a schematic diagram of the state of the stainless steel pipe pickling device of the utility model being immersed in the pickling steel pipe;

[0021] Figure 3 This is a schematic diagram of the state of the steel pipe when the stainless steel pipe pickling device of the utility model is loading;

[0022] Figure 4 This is a side sectional view of the stainless steel pipe pickling device of the utility model immersed in the pickling of the steel pipe;

[0023] Figure 5 This is a schematic diagram of the state of the stainless steel pipe pickling device of the utility model when the steel pipe is tilted to discharge acid;

[0024] The accompanying drawings are marked as follows: 1-pickling tank, 2-partition, 3-acid tank cover, 4-stainless steel pipe, 5-steel pipe conveyor belt, 6-drive shaft, 7-rotating shaft, 8-acid mist processor, 9-exhaust pipe, 10-motor, 11-worm gear reducer, 12-acid discharge pipe, 13-acid inlet pipe, 14-pickling tank, 15-motor placement tank, 16-upper pulley, 17-lower pulley. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with the accompanying drawings.

[0026] Reference Figures 1 to 5, a stainless steel pipe pickling device includes a pickling tank 1, a steel pipe conveyor belt 5 and a driving assembly for driving the steel pipe conveyor belt 5. The pickling tank 1 is provided with a pickling tank 14 with a conical opening in the middle of the top, which is used for guiding the loading of the stainless steel pipe 4. The pickling tank 1 is symmetrically provided with a motor placement groove 15 and a notch for placing the steel pipe conveyor belt 5 on the left and right sides of the pickling tank 14 with the central axis of the pickling tank 14 as the symmetrical axis. The motor placement groove 15 is provided with a driving assembly, and the output shaft of the driving assembly is connected to the driving shaft 6 of the upper pulley 16. The steel pipe conveyor belt 5 is sleeved on the upper pulley 16 and the lower pulley 17, and the lower pulley 17 is installed on the rotating shaft 7; the outward surface of the steel pipe conveyor belt 5 is provided with a plurality of arc grooves, and the arc grooves of the left and right steel pipe conveyor belts 5 cooperate to form a station for arranging the stainless steel pipe 4 at intervals.

[0027] Furthermore, the motor placement slot 15 is provided with drive assemblies at both the front and rear ends. The stainless steel pipe pickling device includes two sets of steel pipe conveyor belts, each set of which includes two left and right steel pipe conveyor belts 5. The drive assembly at the front end is connected to the front set of steel pipe conveyor belts, and the drive assembly at the rear end is connected to the rear set of steel pipe conveyor belts. Of course, if the steel pipe is long, a third drive assembly can be provided in the middle, thereby providing another set of steel pipe conveyor belts in the middle.

[0028] Preferably, the driving assembly includes a worm gear reduction motor, which is composed of a motor 10 and a worm gear reducer 11 , and the output shaft of the motor 10 is connected to the driving shaft 6 of the upper pulley 16 .

[0029] More preferably, an acid mist processor 8 is provided in the middle of the motor placement groove 15 , and the top of the acid mist processor 8 is fixedly connected to the exhaust pipe 9 .

[0030] like Figure 2 As shown, a circular through hole is opened at the bottom left end of the pickling tank 1 for connecting the acid discharge pipe 12, and a circular through hole is opened at the top right end of the pickling tank 1 for connecting the acid inlet pipe 13. Preferably, the bottom plane of the pickling tank 1 is inclined toward the acid discharge port and is stepped.

[0031] like Figure 3 and Figure 4 As shown, a circular through hole is opened on the side of the motor placement groove 15 close to the steel pipe conveyor belt 5 for installing the drive shaft 6, and a partition 2 is provided above the motor placement groove 15 to isolate the pickling liquid and acid mist to avoid damage to the electrical equipment in the motor placement groove 15.

[0032] The partition 2 is provided with a conical opening in the middle that is the same as the pickling tank 1. Two circular through holes are symmetrically provided on both sides of the partition with the central axis of the opening as the symmetry line. The partition 2 is fixedly installed above the pickling tank 1, and the conical surface of the partition is coplanar with the conical surface of the central opening of the pickling tank.

[0033] The exhaust pipe 9 is provided concentrically with the circular through hole of the partition 2, and the opening directions of the two exhaust pipes 9 are opposite to each other, so as to efficiently extract the acid mist and prevent the acid mist from overflowing out of the device.

[0034] In this embodiment, the steel pipe conveyor belt 5 is symmetrically arranged in the pickling tank 1 and there is a certain distance gap. The symmetrically arranged steel pipe conveyor belt 5 is synchronously driven to rotate by a worm gear reduction motor. A pair of steel pipe conveyor belts 5 are arranged at both ends of the stainless steel pipe 4. The steel pipe conveyor belt 5 is connected to the pulley 16. The upper pulley 16 at the upper end of the steel pipe conveyor belt 5 is driven by the drive shaft 6, and the lower pulley 17 at the lower end of the steel pipe conveyor belt 5 is connected by the rotating shaft 7.

[0035] When loading the stainless steel pipe 4, the four motors 10 synchronously drive the drive shaft 6 in forward rotation, so that the four steel pipe conveyor belts 5 move synchronously, and the stainless steel pipe 4 is placed horizontally as a whole and moves downward in turn, and is arranged vertically and immersed in the pickling liquid of the pickling tank 14.

[0036] During the immersion and pickling process of the stainless steel pipe 4, since the worm gear reducer 11 has a self-locking property, the stainless steel pipe 4 can remain stationary in a fixed position, and the stainless steel pipe conveyor belt 5 will not be driven to move due to the self-gravity of the stainless steel pipe 4, causing the stainless steel pipe 4 to fall to the bottom of the pickling tank 14.

[0037] After the stainless steel pipe 4 is soaked in pickling for a period of time, the four motors 10 synchronously drive the steel pipe conveyor belt 5 to rotate forward and reverse, so that the stainless steel pipe 4 performs a small reciprocating up and down motion, stirring the pickling liquid in the pickling tank, so that the pickling liquid has good fluidity and avoids stratification of the pickling liquid.

[0038] At the same time, the acid mist processor 8 continues to work, extracting the acid mist in the device through the exhaust pipe 9 to prevent the acid mist from overflowing, causing environmental pollution and harming the health of workers, until the pickling is completed.

[0039] After the stainless steel pipe 4 is soaked in pickling, the pickling liquid is discharged from the pickling tank 1 through the acid discharge pipe 12. A pair of steel pipe conveyor belts 5 close to the side of the acid discharge pipe 12 of the pickling tank 1 are synchronously driven by the motor 10 connected thereto to rotate forward, so that the stainless steel pipe 4 is tilted toward the side of the acid discharge pipe 12, which is conducive to the discharge of the pickling liquid from the inner wall of the stainless steel pipe 4 and prevents the pickling liquid from being carried away from the stainless steel pipe 4 to the outside of the pickling tank 14. At the same time, the oxide scale precipitates generated on the inner wall during the pickling process can be washed to the bottom of the tank by the pickling liquid, thereby improving the pickling efficiency and reducing the workload of subsequent cleaning of the stainless steel pipe 4.

[0040] When the level of the pickling liquid drops to below the half of the bottom stainless steel pipe 4, the acid tank cover 3 is removed, and the two motors 10 on the left side of the pickling tank 1 are reversed, so that the steel pipe conveyor belt 5 drives one end of the stainless steel pipe 4 to move upward so that the stainless steel pipe 4 is placed horizontally as a whole. Then the four motors 10 are reversed synchronously, and the stainless steel pipe 4 is driven by the steel pipe conveyor belt 5 to move upward as a whole and leave the pickling tank 14 in turn.

[0041] The embodiments of this specification are merely examples of implementations of the utility model and are provided for illustrative purposes only. The scope of protection of this utility model should not be considered limited to the specific forms described in these embodiments. The scope of protection of this utility model also extends to equivalent technical means that can be conceived by ordinary technicians in this field based on the concept of this utility model.

Claims

1. A stainless steel pipe pickling device, characterized in that: The device includes a pickling tank, a steel pipe conveyor belt and a driving assembly for driving the steel pipe conveyor belt. A pickling tank with a conical opening is opened in the middle of the top of the pickling tank, which is used for guiding the loading of stainless steel pipes. The pickling tank is symmetrically provided with motor mounting grooves and notches for mounting the steel pipe conveyor belt on the left and right sides of the pickling tank with the central axis of the pickling tank as the symmetry axis. The motor mounting groove is provided with a driving assembly. The output shaft of the driving assembly is connected to the driving shaft of the upper pulley. The steel pipe conveyor belt is sleeved on the upper pulley and the lower pulley, and the lower pulley is installed on the rotating shaft; a plurality of arc grooves are provided on the outward surface of the steel pipe conveyor belt, and the arc grooves of the left and right steel pipe conveyor belts cooperate to form a work station for arranging stainless steel pipes at intervals.

2. A stainless steel pipe pickling device according to claim 1, characterized in that: The motor mounting groove is provided with a driving assembly at both ends thereof. The stainless steel pipe pickling device includes two groups of front and rear steel pipe conveyor belts. Each group of steel pipe conveyor belts includes two left and right steel pipe conveyor belts. The driving assembly at the front end is connected to the front group of steel pipe conveyor belts, and the driving assembly at the rear end is connected to the rear group of steel pipe conveyor belts.

3. A stainless steel pipe pickling device according to claim 1 or 2, characterized in that: The driving assembly includes a worm gear reduction motor, which is composed of a motor and a worm gear reducer. The output shaft of the motor is connected to the driving shaft of the upper pulley.

4. A stainless steel pipe pickling device according to claim 1 or 2, characterized in that: A circular through hole for connecting the acid discharge pipe is opened at the bottom end of the left side of the pickling tank, and a circular through hole for connecting the acid inlet pipe is opened at the top end of the right side of the pickling tank.

5. A stainless steel pipe pickling device according to claim 1 or 2, characterized in that: The bottom plane of the pickling tank is inclined toward the acid discharge port and is in a stepped shape.

6. A stainless steel pipe pickling device according to claim 1 or 2, characterized in that: The motor placement groove is provided with a circular through hole on one side close to the steel pipe conveyor belt for installing the drive shaft, and a partition is provided above the motor placement groove for isolating the pickling liquid and the acid mist.

7. A stainless steel pipe pickling device according to claim 6, characterized in that: The partition is provided with a conical opening in the middle of the pickling tank, and two circular through holes are symmetrically provided on both sides of the partition with the central axis of the opening as the symmetry line. The partition is fixedly installed above the pickling tank, and the conical surface of the partition is coplanar with the conical surface of the central opening of the pickling tank.

8. A stainless steel pipe pickling device according to claim 1 or 2, characterized in that: An acid mist processor is arranged in the middle of the motor placement groove, and the upper part of the acid mist processor is fixedly connected to an exhaust pipe. The exhaust pipe is arranged to pass through the circular through hole of the partition at the same center, and the opening directions of the two exhaust pipes are the same.

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