Descaling box suitable for high-pressure water descaling of large-diameter steel pipe

Abstract

The descaling box comprises a descaling box body and is characterized in that an inlet guide sleeve is arranged on the front portion of the descaling box body, and a water guide groove is formed in the lower portion of the descaling box body; the inclination direction of the mounting angle of the descaling nozzle is consistent with the moving direction of the steel pipe, and the inclination angle is 8 degrees; water baffles are arranged in front of and behind the descaling collecting pipe, a double-V-shaped water retaining device is arranged in the middle of the descaling box body, and a water retaining iron chain is arranged at an outlet of the descaling box body; the descaling header is connected with a high-pressure water pipeline of the descaling system through a high-pressure clamp type quick coupler, and a bottom plate of the descaling header and a box body of the descaling box are locked through a wedge-shaped quick locking device; the problems that the steel pipe specification span of a large-diameter steel pipe heat treatment production line is large, and descaling high-pressure water splashes seriously can be effectively solved, and the situation that a high-pressure water descaling device is close to an outlet of a heating furnace, and the descaling high-pressure water splashes into the heating furnace is effectively prevented; and meanwhile, the problems that the descaling header is troublesome in specification replacement and long in replacement time are effectively solved, and quick replacement of the descaling header is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of heat treatment in steel pipe manufacturing industry, in particular to a descaling box suitable for high-pressure water descaling of large-diameter steel pipes, mainly used in a large-diameter steel pipe heat treatment production line. Background Art

[0002] At present, the steel pipe specifications of the large-diameter steel pipe heat treatment production line span a large range. To ensure the descaling effect of the high-pressure water descaling device, the distance between the descaling nozzle and the steel pipe surface must be small enough. Therefore, corresponding descaling headers are set according to different specifications of steel pipes. The descaling headers have many specifications and are frequently replaced; but the installation position of the existing high-pressure water descaling descaling box is close to the outlet of the heating furnace, and the main problems are: 1. The inclination direction of the existing descaling nozzle installation angle is opposite to the movement direction of the steel pipe, and the high-pressure descaling water is sprayed in the reverse direction. Although a water retaining nozzle, a V-shaped water retaining device, and a three-layer water retaining chain are arranged in front of the descaling nozzle, the water retaining effect is not ideal. The descaling high-pressure water splashes seriously and can splash into the heating furnace, seriously affecting the stable operation of the heating furnace; 2. The connection between the high-pressure water pipeline of the descaling system and the descaling header is flange-connected, and the bottom plate of the descaling header is fixed with bolts. The specifications of the descaling header are difficult to change and the replacement time is long. Summary of the invention

[0003] The object of the present invention is to overcome the deficiencies of the above-mentioned prior art and to provide a descaling box suitable for high-pressure water descaling of large-diameter steel pipes.

[0004] The technical solution provided by the present invention is: a descaling box suitable for high-pressure water descaling of large-diameter steel pipes, including a descaling box body, which is special in that an inlet guide sleeve is arranged at the front end of the descaling box body, and a water guide groove is arranged at the lower part of the descaling box body; a descaling manifold is arranged in the descaling box body behind the inlet guide sleeve, the descaling manifold is suspended below the descaling manifold bottom plate, and the descaling manifold bottom plate is fixed on the top plate above the front part of the descaling box body; a descaling nozzle is installed on the inner ring of the descaling manifold, and the inclination direction of the installation angle of the descaling nozzle is aligned with the movement of the steel pipe The directions are consistent; water retaining plates are respectively arranged in front and behind the descaling manifold; a double V-shaped water retaining device is arranged in the middle of the descaling box body, and the double V-shaped water retaining device is fixed on the inner wall of the descaling box body; a water retaining iron chain is arranged at the outlet at the rear end of the descaling box body, and the water retaining iron chain is suspended on the bottom plate of the water retaining iron chain, and the bottom plate of the water retaining iron chain is fixed on the top plate above the rear part of the descaling box body; the descaling nozzle is connected with the descaling manifold connecting pipeline through the descaling manifold, and the descaling manifold connecting pipeline is connected with the high-pressure water pipeline of the descaling system through a clamp-type high-pressure quick-release joint.

[0005] Furthermore, the descaling nozzle has an inclination angle of 8°, and the high-pressure descaling water is sprayed in a forward direction.

[0006] Furthermore, the descaling header bottom plate and the descaling box body are fixed by a wedge-shaped quick-locking device.

[0007] Furthermore, the outlet at the rear end of the descaling box body is provided with three layers of water retaining iron chains with an interval of 70 mm.

[0008] Beneficial effects of the present invention: 1. An inlet guide sleeve is provided at the front of the descaling box to prevent the incoming steel pipe from directly hitting the descaling box; a water guide trough is provided at the bottom, through which the used high-pressure water and broken iron oxide sheets flow into the production line trench; 2. The inclination direction of the descaling nozzle installation angle is consistent with the movement direction of the steel pipe, and the high-pressure descaling water is sprayed in the forward direction, which effectively avoids the problem of descaling high-pressure water splashing into the heating furnace; 3. The water retaining measures combining the front and rear water retaining plates of the descaling header, the double V-shaped water retaining device and the water retaining iron chain have effectively solved the serious splashing problem of descaling high-pressure water; 4. The use of clamp-type high-pressure quick-release connectors and wedge-type quick-locking devices greatly shortens the replacement time of descaling manifolds of different specifications and enables quick replacement of descaling manifolds. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 yes Figure 1 AA cross-sectional diagram of .

[0010] In the figure: 1. inlet guide sleeve, 2. descaling box body, 3. water guide groove, 4. descaling manifold bottom plate, 5. descaling manifold, 6. descaling nozzle, 7. water retaining plate, 8. wedge-shaped quick locking device, 9. double V-shaped water retaining device, 10. water retaining chain, 11. water retaining chain bottom plate, 12. descaling manifold connecting pipeline, 13. descaling system high-pressure water pipeline, 14. clamp-type high-pressure quick-release connector. DETAILED DESCRIPTION

[0011] For better understanding and implementation, the present invention is described in detail below with reference to the accompanying drawings.

[0012] like Figure 1 , 2As shown, a descaling box suitable for high-pressure water descaling of large-diameter steel pipes includes a descaling box body 2, an inlet guide sleeve 1 is installed at the front end of the descaling box body 2 to prevent the incoming steel pipe from directly hitting the descaling box body 1; a water guide trough 3 is installed at the lower part of the descaling box body 2, and the used high-pressure water and broken iron oxide sheets flow into the production line ditch from there; a descaling manifold 5 is installed in the descaling box body 2 behind the inlet guide sleeve 1, and the descaling manifold 5 is suspended below the descaling manifold bottom plate 4, and the descaling manifold bottom plate 4 is fixed to the top plate above the front part of the descaling box body 2 and locked with a wedge-shaped quick locking device 8; a descaling nozzle 6 is installed on the inner ring of the descaling manifold 5, and the inclination direction of the installation angle of the descaling nozzle 6 is consistent with the movement direction of the steel pipe, and the inclination angle of the descaling nozzle 6 is 8°, and the high-pressure descaling water is sprayed in the forward direction, which effectively avoids the problem of the descaling high-pressure water splashing into the heating furnace; in the descaling manifold 5 A water retaining plate 7 is installed at the front and rear respectively; a double V-shaped water retaining device 9 is installed in the middle of the descaling box body 2, and the double V-shaped water retaining device 9 is fixed on the inner wall of the descaling box body 2; a water retaining iron chain 10 is installed at the rear end outlet of the descaling box body 2, and the water retaining iron chain 10 is suspended on the water retaining iron chain bottom plate 11, and the water retaining iron chain bottom plate 11 is fixed on the top plate above the rear part of the descaling box body 2; by taking water retaining measures combining the front and rear water retaining plates of the descaling manifold, the double V-shaped water retaining device and the water retaining iron chain, the problem of serious splashing of descaling high-pressure water is better solved; the descaling nozzle 6 is connected to the descaling manifold connecting pipeline 12 through the descaling manifold 5, and the descaling manifold connecting pipeline 12 is connected to the descaling system high-pressure water pipeline 13 through a clamp-type high-pressure quick-release joint 14; the clamp-type high-pressure quick-release joint 14 and the wedge-type quick-locking device 8 are selected, which greatly shortens the replacement time of descaling manifolds of different specifications.

[0013] The present invention discloses a descaling box suitable for high-pressure water descaling of large-diameter steel pipes. The outer diameter range of the steel pipes heat-treated by the heat treatment line is F177.8~508mm. In order to ensure the descaling effect, four descaling headers of F177-219mm, F245-299mm, F325-406mm and F457-508mm are set. Under the premise of ensuring that the impact force of the descaling nozzle remains unchanged, the inclination direction of the installation angle of the descaling nozzle is consistent with the movement direction of the steel pipe, with an inclination angle of 8°. The high-pressure descaling water is sprayed in the forward direction, which effectively avoids the problem of the descaling high-pressure water splashing into the heating furnace. The water-blocking nozzle is cancelled, and the descaling header is provided with a water-blocking nozzle at the front and rear. The water retaining plates of corresponding specifications are matched, and the middle part of the descaling box body is provided with a double V-shaped water retaining device. The outlet of the descaling box body is provided with 3 layers of water retaining iron chains with an interval of 70mm. By taking water retaining measures combining the front and rear water retaining plates of the descaling manifold, the double V-shaped water retaining device and the water retaining iron chain, the problem of serious splashing of descaling high-pressure water is better solved; the connection between the descaling manifold and the high-pressure water pipeline of the descaling system adopts high-pressure clamp-type quick-release connector, and the fixation of the descaling manifold bottom plate and the descaling box body is locked with a wedge-shaped quick-locking device, which greatly shortens the replacement time of descaling manifolds of different specifications; the descaling box prevents the splashing of descaling high-pressure water and the rapid replacement of the descaling manifold, achieving the expected effect.

[0014] It should be understood that the technical features not elaborated in detail in this specification belong to the prior art. Although the implementation methods of the present invention are described above in conjunction with the accompanying drawings, the present invention is not limited to the above-mentioned specific implementation methods, which are merely illustrative and not restrictive. Ordinary technicians in this field can make more forms under the enlightenment of the present invention without departing from the scope of protection of the present invention and the claims, which are all within the protection scope of the present invention.

Claims

1. A descaling box suitable for high-pressure water descaling of large-diameter steel pipes, comprising a descaling box body (2), characterized in that: The front end of the descaling box body (2) is provided with an inlet guide sleeve (1), and the lower part of the descaling box body (2) is provided with a water guide groove (3); a descaling manifold (5) is provided in the descaling box body (2) behind the inlet guide sleeve (1), and the descaling manifold (5) is suspended below the descaling manifold bottom plate (4), and the descaling manifold bottom plate (4) is fixed to the top plate above the front part of the descaling box body (2); a descaling nozzle (6) is installed on the inner ring of the descaling manifold (5), and the inclination direction of the installation angle of the descaling nozzle (6) is consistent with the movement direction of the steel pipe; water retaining plates (7) are respectively provided at the front and rear of the descaling manifold (5); the descaling box body ( 2) a double V-shaped water retaining device (9) is provided in the middle, and the double V-shaped water retaining device (9) is fixed on the inner wall of the descaling box body (2); a water retaining iron chain (10) is provided at the rear end outlet of the descaling box body (2), and the water retaining iron chain (10) is suspended on a water retaining iron chain bottom plate (11), and the water retaining iron chain bottom plate (11) is fixed on the top plate above the rear part of the descaling box body (2); the descaling nozzle (6) is connected to the descaling manifold connecting pipeline (12) through the descaling manifold (5), and the descaling manifold connecting pipeline (12) is connected to the descaling system high-pressure water pipeline (13) through a clamp-type high-pressure quick-release joint (14).

2. A descaling box suitable for high-pressure water descaling of large-diameter steel pipes according to claim 1, characterized in that: The descaling nozzle (6) has an inclination angle of 8°, and the high-pressure descaling water is sprayed in the forward direction.

3. A descaling box suitable for high-pressure water descaling of large-diameter steel pipes according to claim 1, characterized in that: The descaling header bottom plate (4) and the descaling box body (2) are fixed by a wedge-shaped quick-locking device (8).

4. A descaling box suitable for high-pressure water descaling of large-diameter steel pipes according to claim 1, characterized in that: The outlet at the rear end of the descaling box body (2) is provided with three layers of water retaining iron chains (10) with an interval of 70 mm.

Images