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 effect is improved, and the pickling quality of the stainless steel pipe is ensured.

Description

Technical Field

[0001] The invention 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 steel pipe without joints, usually used as a pipeline for conveying fluids, such as oil, natural gas, coal gas, etc. During the production process, stainless steel pipes need to go through a pickling step to remove surface oxides and other impurities and improve their surface quality and corrosion resistance.

[0003] In the prior art, the method of pickling stainless steel pipes is usually to put them into a pickling tank in bundles and soak them 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 low 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, but the existing pickling equipment is not easy to carry and operate, which increases the complexity and inconvenience of the production process, thereby affecting 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 pipe.

[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 shortcomings of the prior art, the present invention 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 present invention to solve its technical problem 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 provided in the middle of the top of the pickling tank for guiding the feeding of stainless steel pipes. The pickling tank has motor placement grooves and notches for placing the steel pipe conveyor belt symmetrically provided on the left and right sides of the pickling tank with the central axis of the pickling tank as the symmetry axis. The motor placement 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, the motor placement slot is provided with drive components at both ends, and 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 drive component at the front end is connected to the front group of steel pipe conveyor belts, and the drive component at the rear end is connected to the rear group of steel pipe conveyor belts. Of course, if the steel pipe is long, a third drive component can be provided in the middle, so that another group of steel pipe conveyor belts can be provided in the middle.

[0011] Preferably, the driving assembly comprises 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 of the left side of the pickling tank, and a circular through hole for connecting the acid inlet pipe is opened at the top 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 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 acid mist to avoid damaging 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 arranged 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 opening in the middle of the pickling tank.

[0016] More preferably, an acid mist processor is provided in the middle of the motor mounting groove, and an exhaust pipe is fixedly connected to the top of the acid mist processor. 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 out of the device.

[0017] The technical concept of the present invention is as follows: when in use, a plurality of 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 in the pickling tank at intervals, 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 be fully in contact with the pickling liquid, and at the same time, the pickling liquid in the pickling tank can be stirred, so that the pickling liquid has good fluidity, avoiding stratification of the pickling liquid, and further achieving 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 present invention 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 It is a top view of the stainless steel pipe pickling device of the present invention with the partition plate and the acid tank cover removed;

[0020] Figure 2 It is a schematic diagram of the state of the stainless steel pipe pickling device of the present invention being immersed in the pickling steel pipe;

[0021] Figure 3 It is a schematic diagram of the state of the steel pipe when the stainless steel pipe pickling device of the present invention is loading;

[0022] Figure 4 It is a side cross-sectional view of a stainless steel pipe pickling device of the present invention immersed in a pickling steel pipe;

[0023] Figure 5 It is a schematic diagram of the state of the stainless steel pipe pickling device of the present invention when the steel pipe is tilted to discharge acid;

[0024] The accompanying drawings are marked as: 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 Figure 1 to Figure 5A stainless steel pipe pickling device comprises a pickling tank 1, a steel pipe conveyor belt 5 and a driving assembly for driving the steel pipe conveyor belt 5. A pickling tank 14 with a conical opening is opened in the middle of the top of the pickling tank 1 for guiding the feeding 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 symmetry 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; a plurality of arc grooves are provided on the outward surface of the steel pipe conveyor belt 5, and the arc grooves of the left and right steel pipe conveyor belts 5 cooperate to form a station for arranging the stainless steel pipes 4 at intervals.

[0027] Furthermore, the motor placement slot 15 is provided with drive components at both ends, and the stainless steel pipe pickling device includes two groups of steel pipe conveyor belts, each group of steel pipe conveyor belts includes two left and right steel pipe conveyor belts 5. The drive component at the front end is connected to the front group of steel pipe conveyor belts, and the drive component at the rear end is connected to the rear group of steel pipe conveyor belts. Of course, if the steel pipe is long, a third drive component can be provided in the middle, so that another group of steel pipe conveyor belts can be provided 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 disposed 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 for connecting the acid discharge pipe 12 is opened at the bottom left side of the pickling tank 1, and a circular through hole for connecting the acid inlet pipe 13 is opened at the top right side of the pickling tank 1. 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 plate 2 is arranged 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 cocentrically arranged with the circular through hole of the partition plate 2, and the opening directions of the two exhaust pipes 9 are opposite, so as to efficiently extract the acid mist and prevent the acid mist from overflowing outside the device.

[0034] In this embodiment, the steel pipe conveyor belt 5 is symmetrically arranged in the pickling tank 1 with 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 the stainless steel pipe 4 is loaded, the four motors 10 synchronously drive the drive shaft 6 to rotate forward, 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 vertically arranged and immersed in the pickling liquid of the pickling tank 14.

[0036] During the 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 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, and extracts the acid mist in the device through the exhaust pipe 9 to prevent the overflow of the acid mist, which will cause environmental pollution and harm to the health of workers, until the pickling is completed.

[0039] After the stainless steel pipe 4 is immersed 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 precipitate 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, and 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 contents described in the embodiments of this specification are merely enumerations of implementation forms of the inventive concept and are for illustrative purposes only. The protection scope of the present invention should not be considered to be limited to the specific forms described in this embodiment, and the protection scope of the present invention also extends to equivalent technical means that can be thought of by ordinary technicians in this field based on the inventive concept.

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 component 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 has motor placement grooves and notches for placing the steel pipe conveyor belt symmetrically opened on the left and right sides of the pickling tank with the central axis of the pickling tank as the symmetry axis. The motor placement groove is provided with a driving component, and the output shaft of the driving component 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 as claimed in claim 1, characterized in that: The motor mounting groove is provided with driving components at both ends thereof; the stainless steel pipe pickling device comprises two groups of front and rear steel pipe conveyor belts, each group of steel pipe conveyor belts comprises two left and right steel pipe conveyor belts; the driving component at the front end is drivingly connected to the front group of steel pipe conveyor belts, and the driving component at the rear end is drivingly connected to the rear group of steel pipe conveyor belts.

3. A stainless steel pipe pickling device as claimed in claim 1 or 2, characterized in that: The driving assembly comprises 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 as claimed in claim 1 or 2, characterized in that: A circular through hole for connecting the acid discharge pipe is opened at the bottom of the left side of the pickling tank, and a circular through hole for connecting the acid inlet pipe is opened at the top of the right side of the pickling tank.

5. A stainless steel pipe pickling device as claimed in 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 as claimed in 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 driving shaft, and a partition is arranged above the motor placement groove for isolating the pickling liquid and the acid mist.

7. A stainless steel pipe pickling device as claimed in 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 arranged 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 opening in the middle of the pickling tank.

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

Images