Pickling device for stainless steel seamless steel pipe processing

Abstract

The utility model discloses a pickling device for stainless steel seamless steel pipe processing, which relates to the technical field of pickling, and comprises a pickling tank, a support ring is fixedly mounted in the pickling tank, a steel pipe is placed above the support ring, a liquid inlet sleeve is arranged on one side of the pickling tank, and an extrusion pad is arranged at one end, close to the steel pipe, of the liquid inlet sleeve. Telescopic sleeves are fixedly mounted on the side walls of the pickling tank at two ends of the steel pipe. The steel pipe pickling device is reasonable in design structure, a steel pipe can be placed above the supporting ring, the telescopic sleeve on one side works and extrudes the steel pipe to be connected with the extrusion pad in a sleeved mode, the end cover is closed, the power source is started to enable the friction belt to move, and acid liquid is supplied into the steel pipe through the liquid supply sleeve to conduct pickling on the interior of the steel pipe; the acid liquid is accumulated in the pickling tank to clean the outer surface of the rotating steel pipe, and the liquid level is controlled to be located above the central plane of the steel pipe by controlling the opening and closing degree of the valve, so that the acid consumption can be reduced, and acid volatilization is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of pickling, in particular to a pickling device for processing stainless steel seamless steel pipes. Background Art

[0002] In order to improve the corrosion resistance of stainless steel seamless steel pipes, the usual practice is to pickle and passivate the stainless steel seamless steel pipes after completion, remove the oxide scale produced by welding and high-temperature processing, make it silvery and shiny, and form a layer of oxide film with chromium as the main substance on the treated surface, so that secondary oxygen corrosion will no longer occur, thus achieving the purpose of passivation, thereby improving the surface corrosion protection quality of stainless steel seamless steel pipe products and extending the service life of the equipment.

[0003] An existing patent for a steel pipe pickling device (CN 211199418 U) discloses "a substrate, a wiping piece is provided on the substrate, the wiping piece is arranged at a relative position of the substrate, the wiping piece is used to wipe the outside of the steel pipe, and a stirring part is provided on the substrate, the stirring part is used to stir the pickling liquid. An outer tube cleaning mechanism and an inner tube cleaning mechanism, the inner tube cleaning mechanism comprises: an acid extraction tube, one end of the acid extraction tube is used to extend into the interior of the steel pipe, a water outlet is provided on one end of the acid extraction tube, the water outlet is used to pickle the inside of the steel pipe; an adjustment shaft, the adjustment shaft is used to adjust to match the inner diameter of the steel pipe; a wiping part, the number of the wiping parts is the same as the number of the adjustment shafts, and the wiping part is used to wipe the inner wall of the steel pipe". This patent can effectively complete passivation, but uses a large amount of acid. For this reason, we provide a pickling device for stainless steel seamless steel pipe processing to solve the above problems. Utility Model Content

[0004] 1) Technical issues solved

[0005] The utility model aims to make up for the deficiencies of the prior art and provides a pickling device for processing stainless steel seamless pipes.

[0006] 2) Technical solution

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a pickling device for processing seamless stainless steel pipes, comprising a pickling tank, a support ring is fixedly installed inside the pickling tank, the steel pipe is placed above the support ring, a liquid inlet sleeve is arranged on one side of the pickling tank, an extrusion pad is arranged at the end of the liquid inlet sleeve close to the steel pipe, a telescopic sleeve is fixedly installed on the side walls of the pickling tank at both ends of the steel pipe, an extrusion half ring is fixedly installed on the free end of the telescopic sleeve, an end cover is rotatably connected to the outside of the pickling tank, the end cover covers the top of the pickling tank, a liquid supply sleeve is arranged on the side of the liquid inlet sleeve of the pickling tank, and a liquid discharge pipe is arranged on one side of the pickling tank.

[0008] Furthermore, a support frame is fixedly installed in the middle of the end cover, a friction belt is transmission-connected to the outer surface of the support frame, a power source for driving the friction belt to move is fixedly installed inside the end cover, and the liquid inlet sleeve and the extrusion pad are rotationally connected via a rotating ring.

[0009] Furthermore, protrusions are provided inside the pickling tank between adjacent support rings, and the height of the protrusions is higher than the plane where the center points of the support rings are located.

[0010] Furthermore, a connecting frame is provided inside the pickling tank, and the connecting frame is located above the steel pipe. Limiting plates are fixedly installed at both ends of the connecting frame. The limiting plates are respectively on both sides of the steel pipe. A sliding column is slidably connected to the middle of the limiting plate, and the sliding columns on the same side are fixedly connected by the connecting plate.

[0011] Furthermore, a limiting sleeve is fixedly installed on the upper surface of the connecting frame, the limiting sleeve is internally slidably connected to a limiting rod, and the limiting rod is fixedly connected to the connecting plate.

[0012] Furthermore, a control valve is connected to and penetrated on a side of the drain pipe away from the pickling tank.

[0013] Furthermore, the support ring is in a semi-ring shape, and the angle between the planes on both sides of the support ring is less than sixty degrees.

[0014] 3) Beneficial effects:

[0015] Compared with the prior art, the pickling device for stainless steel seamless pipe processing has the following beneficial effects:

[0016] 1. The utility model places a steel pipe on the top of a support ring, squeezes the steel pipe and the extrusion pad through the telescopic sleeve on one side, closes the end cover, starts the power source to move the friction belt, supplies acid to the inside of the steel pipe through the liquid supply sleeve to pickle the inside of the steel pipe, and makes the acid accumulate in the pickling tank to clean the outer surface of the rotating steel pipe. By controlling the size of the valve opening and closing, the liquid level is controlled to be above the center plane of the steel pipe, thereby reducing the amount of acid used and avoiding the volatilization of the acid.

[0017] 2. The utility model is provided with a connecting frame inside the pickling tank, the connecting frame is located above the steel pipe, and limit plates are fixedly installed at both ends of the connecting frame. The limit plates are respectively on both sides of the steel pipe, and a sliding column is slidably connected to the middle of the limit plate. The sliding columns on the same side are fixedly connected by the connecting plate. Through such an arrangement, the steel pipe can be transported out of the pickling tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the connection frame of the utility model;

[0020] Figure 3 This is a schematic diagram of the end cover connection of the utility model;

[0021] Figure 4 This is a schematic diagram of the friction belt connection of the utility model;

[0022] Figure 5 It is a partial schematic diagram of the pickling tank of the utility model.

[0023] In the figure: 1. pickling tank; 2. support ring; 3. liquid inlet sleeve; 4. extrusion pad; 5. telescopic sleeve; 6. extrusion half ring; 7. end cover; 8. support frame; 9. friction belt; 10. power source; 11. liquid supply sleeve; 12. discharge pipe; 13. control valve; 14. protrusion; 15. connecting frame; 16. limit plate; 17. sliding column; 18. connecting plate; 19. limit sleeve; 20. limit rod. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] like Figure 1-4 As shown, the utility model provides a technical solution: a pickling device for processing stainless steel seamless steel pipes, comprising a pickling tank 1, a support ring 2 is fixedly installed inside the pickling tank 1, the steel pipe is placed above the support ring 2, a liquid inlet sleeve 3 is arranged on one side of the pickling tank 1, an extrusion pad 4 is arranged at one end of the liquid inlet sleeve 3 close to the steel pipe, a telescopic sleeve 5 is fixedly installed on the side walls of the pickling tank 1 at both ends of the steel pipe, an extrusion half ring 6 is fixedly installed at the free end of the telescopic sleeve 5, an end cover 7 is rotatably connected to the outside of the pickling tank 1, the end cover 7 covers the top of the pickling tank 1, a liquid supply sleeve 11 is arranged on one side of the liquid inlet sleeve 3 of the pickling tank 1, and a discharge pipe 12 is arranged on one side of the pickling tank 1.

[0026] A support frame 8 is fixedly installed in the middle of the end cover 7, and a friction belt 9 is transmission-connected to the outer surface of the support frame 8. A power source 10 for driving the friction belt 9 to move is fixedly installed inside the end cover 7. The liquid inlet sleeve 3 and the extrusion pad 4 are rotatably connected via a rotating ring. Through such an arrangement, the steel pipe can be rotated by the movement of the friction belt 9, thereby enabling the steel pipe to be pickled evenly.

[0027] A protrusion 14 is provided between adjacent support rings 2 inside the pickling tank 1. The height of the protrusion 14 is higher than the plane where the center point of the support ring is located. This arrangement can occupy the volume of the pickling tank 1, thereby reducing the amount of acid used.

[0028] A connecting frame 15 is provided inside the pickling tank 1. The connecting frame 15 is located above the steel pipe. Limiting plates 16 are fixedly installed at both ends of the connecting frame 15. The limiting plates 16 are respectively on both sides of the steel pipe. A sliding column 17 is slidably connected to the middle of the limiting plate 16. The sliding column 17 on the same side is fixedly connected by a connecting plate 18. Through such an arrangement, the steel pipe can be transported out of the pickling tank.

[0029] A limiting sleeve 19 is fixedly mounted on the upper surface of the connecting frame 15 , and a limiting rod 20 is slidably connected inside the limiting sleeve 19 . The limiting rod 20 is fixedly connected to the connecting plate 18 . This arrangement can prevent the connecting plate 18 from falling off.

[0030] A control valve 13 is connected to and penetrates the side of the drain pipe 12 away from the pickling tank 1 , and the liquid level of the acid solution can be controlled by the control valve 13 .

[0031] The shape of the support ring 2 is semi-circular, and the angle between the planes on both sides of the support ring 2 is less than sixty degrees. This arrangement can provide support while reducing the contact area with the steel pipe.

[0032] Working principle: Place the steel pipe on top of the support ring 2, and squeeze the steel pipe and the extrusion pad 4 through the telescopic sleeve 5 on one side, close the end cover 7, start the power source 10 to move the friction belt 9, supply acid to the inside of the steel pipe through the liquid supply sleeve 11 to pickle the inside of the steel pipe, and make the acid accumulate in the pickling tank 1 to clean the outer surface of the rotating steel pipe, and control the opening and closing size of the valve 13 to control the liquid level to be above the center plane of the steel pipe, so as to reduce the amount of acid used and avoid acid volatilization.

Claims

1. A pickling device for processing seamless stainless steel pipes, comprising a pickling tank (1), characterized in that: A support ring (2) is fixedly installed inside the pickling tank (1), and the steel pipe is placed above the support ring (2). A liquid inlet sleeve (3) is arranged on one side of the pickling tank (1), and an extrusion pad (4) is arranged at one end of the liquid inlet sleeve (3) close to the steel pipe. Telescopic sleeves (5) are fixedly installed on the side walls of the pickling tank (1) at both ends of the steel pipe, and an extrusion half ring (6) is fixedly installed at the free end of the telescopic sleeve (5); The outside of the pickling tank (1) is rotatably connected to an end cover (7), and the end cover (7) covers the top of the pickling tank (1); A liquid supply sleeve (11) is provided on one side of the liquid inlet sleeve (3) of the pickling tank (1), and a liquid discharge pipe (12) is provided on one side of the pickling tank (1).

2. The pickling device for processing stainless steel seamless pipe according to claim 1, characterized in that: A support frame (8) is fixedly installed in the middle of the end cover (7), a friction belt (9) is transmission-connected to the outer surface of the support frame (8), a power source (10) for driving the friction belt (9) to move is fixedly installed inside the end cover (7), and the liquid inlet sleeve (3) and the extrusion pad (4) are rotationally connected via a rotating ring.

3. The pickling device for processing stainless steel seamless pipe according to claim 1, characterized in that: A protrusion (14) is provided inside the pickling tank (1) between adjacent support rings (2), and the height of the protrusion (14) is higher than the plane where the center point of the support ring is located.

4. The pickling device for processing seamless stainless steel pipe according to claim 1, characterized in that: A connecting frame (15) is arranged inside the pickling tank (1), the connecting frame (15) is located above the steel pipe, and limit plates (16) are fixedly installed at both ends of the connecting frame (15), the limit plates (16) are respectively located at both sides of the steel pipe, and a sliding column (17) is slidably connected to the middle of the limit plate (16), and the sliding columns (17) on the same side are fixedly connected via a connecting plate (18).

5. A pickling device for processing stainless steel seamless pipe according to claim 4, characterized in that: A limiting sleeve (19) is fixedly mounted on the upper surface of the connecting frame (15), the interior of the limiting sleeve (19) is slidably connected to a limiting rod (20), and the limiting rod (20) is fixedly connected to the connecting plate (18).

6. The pickling device for processing stainless steel seamless pipe according to claim 1, characterized in that: The side of the liquid discharge pipe (12) away from the pickling tank (1) is connected to and penetrated by a control valve (13).

7. The pickling device for processing stainless steel seamless pipe according to claim 1, characterized in that: The support ring (2) is in the shape of a semi-ring, and the angle between the planes on both sides of the support ring (2) is less than sixty degrees.

Images