An energy-saving high-pressure water descaling unit and device

Abstract

The present invention belongs to the technical field of hot strip continuous casting and rolling, and provides an energy-saving high-pressure water descaling unit and device. The descaling unit includes a rotating shaft and a bearing seat. A sleeve with a relative rotational relationship with the rotating shaft is provided on the rotating shaft. An inlet communicating with the water inlet pipe and outlets respectively corresponding to a plurality of nozzles in one-to-one correspondence are provided on the sleeve. An upper water trough communicating with the inlet and covering all the outlets is provided on the inner wall of the sleeve along the axial direction. A series of water through holes are provided along the axial direction of the rotating shaft, which can be respectively in one-to-one correspondence with the plurality of outlets provided on the sleeve and are arranged in a staggered manner in a 360° range in the radial direction of the rotating shaft. The series of water through holes can also communicate with the upper water trough. The descaling unit of the present invention can uniformly remove the oxide layer on the surface of the slab under the condition of a small descaling water volume, reduce the temperature drop of the hot rolled slab, avoid the use of a rotary joint, reduce the failure rate, simplify the structural type, and reduce the investment.

Description

Technical Field

[0001] The present invention belongs to the technical field of hot-rolled thin slab continuous casting and rolling, and particularly relates to an energy-saving high-pressure water descaling unit and device. Background Art

[0002] In a hot-rolled thin slab continuous casting and rolling mill, before rough rolling the hot-rolled slab, it is necessary to use high-pressure water to remove the oxide layer on the surface of the slab to prevent the scale from being pressed into the hot-rolled slab during rough rolling, which affects the product quality. At the same time, the hot-rolled slab needs to maintain a certain high temperature for rough rolling and subsequent finishing processes. Therefore, during the descaling process, it is not desirable to reduce the temperature of the hot-rolled slab too much.

[0003] Currently, the descaling method adopted is rotational treatment, that is, a number of groups of rotating nozzles are arranged along the width range of the slab. During the descaling process of the slab, the nozzles rotate within a certain radius range, so as to reduce the number of nozzles while achieving descaling within the entire width range of the slab. However, this method has many problems, including: since the nozzles rotate in a certain radius, its lateral speed is constantly changing, resulting in uneven distribution during the descaling process and uneven descaling effect; since the nozzles need to rotate, a rotary joint is required for water supply. Under such high-speed and high-pressure working conditions, the rotary joint is very easy to be damaged; in order to drive each group of rotating nozzles, multiple sets of transmission devices are required, with high investment costs, etc., resulting in difficulties in popularization at present. Even if it has been adopted in China, it has been abandoned due to its high failure rate and difficult maintenance.

[0004] Therefore, it is very necessary to explore an energy-saving high-pressure water descaling unit, which can avoid the unevenness of descaling, avoid using a rotary joint, reduce the failure rate, simplify the structure type, and reduce the investment on the premise of meeting the descaling effect. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide an energy-saving high-pressure water descaling unit and device, aiming to solve the problems of uneven descaling and high failure rate.

[0006] The innovative idea of the present invention is to design an energy-saving high-pressure water descaling device, including a rotating shaft and bearing seats arranged on both sides of the rotating shaft. A sleeve with a relative rotational relationship with the rotating shaft is arranged on the rotating shaft. The sleeve is provided with a water inlet communicating with the water inlet pipe and water outlets respectively corresponding to a plurality of nozzles. An upper water trough communicating with the water inlet and covering all the water outlets is arranged on the inner wall of the sleeve along the axial direction. A series of water through holes are arranged along the axial direction of the rotating shaft, which can respectively correspond to and communicate with the plurality of water outlets arranged on the sleeve and are arranged in a staggered manner within a 360° range in the radial direction of the rotating shaft. The series of water through holes can also communicate with the upper water trough.

[0007] The working principle of the present invention is as follows: By uniformly and staggeredly arranging a series of water through-holes at 360° intervals on the rotating shaft, and each water through-hole is provided with a corresponding nozzle. As the rotating shaft rotates, the channels between the water inlet and the nozzles are successively and briefly connected, so as to achieve spraying descaling at equal time intervals for each nozzle, thereby realizing uniform descaling within the width range of the hot-rolled slab.

[0008] Further, the radial angles between two adjacent water through-holes are the same.

[0009] Further, it further includes a sliding sleeve arranged between the rotating shaft and the sleeve. A lower water through-groove communicating with the upper water through-groove provided on the sleeve and a series of water through-holes provided on the rotating shaft is arranged on the outer wall of the sliding sleeve along the axial direction. The sliding sleeve is also provided with water through-openings respectively corresponding and communicating with a plurality of water outlet openings provided on the sleeve. And the lower water through-groove covers all the water through-openings, and the plurality of water through-openings can also be respectively corresponding and communicating with a series of water through-holes provided on the rotating shaft.

[0010] Further, the sleeve and the sliding sleeve are positioned and connected through a pin shaft and a pressing plate. The sliding sleeve is rotatably connected with the rotating shaft. The sleeve is provided with an upper positioning groove, the sliding sleeve is provided with a lower positioning groove for placing the pin shaft and matching with the upper positioning groove provided on the sleeve, and the sleeve is provided with a groove for placing the pressing plate.

[0011] Further, the upper water through-groove provided on the sleeve covers the lower water through-groove provided on the sliding sleeve, and the upper water through-groove and the lower water through-groove are in a rectangular long hole structure.

[0012] Further, the cross-section of the sleeve is in a structure with a square outside and a circle inside.

[0013] Further, the sleeve is fixedly installed through a support.

[0014] The present invention also mentions a descaling device applying the above-mentioned energy-saving high-pressure water descaling unit.

[0015] Further, it includes a transmission system and an energy-saving high-pressure water descaling unit. The energy-saving high-pressure water descaling unit is provided with multiple units and is arranged corresponding up and down and at intervals relative to the hot-rolled slab. A plurality of energy-saving high-pressure water descaling units are all connected to one transmission system.

[0016] The advantages of the present invention are as follows: The energy-saving high-pressure water descaling unit of the present invention can uniformly remove the oxide layer on the surface of the slab under the condition of a smaller descaling water volume, reduce the temperature drop of the hot-rolled slab, avoid using a rotary joint, reduce the failure rate, simplify the structural type, and reduce the investment.

[0017] Other advantages, objects and features of the present invention will be set forth in part in the following description, and in part will be obvious to those skilled in the art upon examination of the following, or may be learned by practice of the present invention. The objects and other advantages of the present invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to make the objects, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the drawings, wherein:

[0019] Figure 1 is a schematic cross-sectional view of the overall structure of the energy-saving high-pressure water descaling unit of the present invention.

[0020] Figure 2 is Figure 1 a schematic view of the sleeve structure in; a is an axial cross-sectional view, and b is a radial cross-sectional view.

[0021] Figure 3 is Figure 1 a schematic view of the sliding sleeve structure in; a is an axial cross-sectional view, and b is a radial cross-sectional view.

[0022] Figure 4 is Figure 1 a schematic perspective view of the rotating shaft in.

[0023] Figure 5 is an application schematic view of the energy-saving high-pressure water descaling unit of the present invention.

[0024] Figure 6 is Figure 5 a schematic top view of.

[0025] Reference numerals: 100 is a drive system, 200 is an energy-saving high-pressure water descaling unit, 300 is a hot-rolled slab; 1 is a rotating shaft, 2 is a bearing seat, 3 is a sleeve, 4 is a sliding sleeve, 5 is a nozzle, 6 is a water inlet pipe, 7 is a support, 8 is a pin shaft, 9 is a pressing plate; 11 is a water through hole; 31 is an upper water trough, 32 is a water outlet, 33 is a water inlet, 34 is an upper positioning groove, 35 is a groove; 41 is a lower water trough, 42 is a water through port, 43 is a lower positioning groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The following specific examples illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the diagrams provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0027] As Figures 1-4 shown, in this embodiment, the energy-saving high-pressure water descaling unit mentioned is achieved by sequentially and evenly staggering a series of water through-holes within a 360° range on the rotating shaft. Each water through-hole has a corresponding nozzle. As the rotating shaft rotates, the channels between the water inlet and the nozzles are sequentially and briefly connected, so as to achieve water spraying descaling at equal time intervals for each nozzle, thereby realizing uniform descaling within the width range of the hot-rolled slab.

[0028] Specifically, the main components of this descaling unit include: a rotating shaft 1, a bearing block 2, a sleeve 3, a sliding sleeve 4, a nozzle 5, a water inlet pipe 6, a support 7, a pin shaft 8, a pressing plate 9, etc. Among them, a sleeve 3 with a relative rotational relationship with the rotating shaft 1 is provided on the rotating shaft 1 through the sliding sleeve 4. Shoulder parts (not marked) matching the bearing blocks 2 are symmetrically provided at both ends thereof, and a keyway (not marked) matching a coupling (not marked) is provided on the driving side; a water inlet 33 communicating with the water inlet pipe 6 and a plurality of water outlet ports 32 respectively corresponding to and communicating with a plurality of nozzles 5 are provided on the sleeve 3. An upper water trough 31 communicating with the water inlet 33 and covering all the water outlet ports 32 is provided on the inner wall of the sleeve 3 along the axial direction. A series of water through holes 11 are provided along the axial direction of the rotating shaft 1, which can respectively correspond to and communicate with the plurality of water outlet ports 32 provided on the sleeve 3 and are arranged in a staggered manner in a 360° range in the radial direction of the rotating shaft. The series of water through holes 11 can also communicate with the upper water trough 31; and a lower water trough 41 communicating with the upper water trough 31 provided on the sleeve 3 and the series of water through holes 11 provided on the rotating shaft 1 is provided on the outer wall of the sliding sleeve 4 along the axial direction. Water through holes 42 respectively corresponding to and communicating with the plurality of water outlet ports 32 provided on the sleeve 3 are also provided on the sliding sleeve 4, and the lower water trough 41 covers all the water through holes 42. The plurality of water through holes 42 can also respectively correspond to and communicate with the series of water through holes 11 provided on the rotating shaft 1. In this way, a series of water through holes 11 are alternately provided in the middle of the rotating shaft 1. The distance between any two adjacent water through holes 11 is the same as the distance between the water through holes 42 and the water outlet ports 32 provided on the sliding sleeve 4 and the sleeve 3. At the same time, the radial included angle between any two adjacent water through holes 11 is the same, such as 30°, and the radial included angle between the first and the last water through holes 11 is 360°; so that during the rotation of the rotating shaft 1, the water through holes thereon are successively communicated with the sliding sleeve 4 and the sleeve 3; that is, water enters the sleeve 3 through the water inlet pipe 6, and successively passes through the water inlet 33, the upper water trough 31, the lower water trough 41, the water through holes 11, the water through holes 42, and the water outlet ports 32 and then enters the nozzle 5, and the nozzle 5 sprays water on the upper and lower surfaces of the hot-rolled slab 300 for descaling treatment.

[0029] In this embodiment, two bearing blocks 2 are provided, which are symmetrically arranged on both sides of the rotating shaft 1, used to provide support for the rotating shaft 1 and allow the rotation of the rotating shaft.

[0030] The sleeve 3 in this embodiment adopts a rectangular cross-sectional structure, and an axial hole is provided in the central part for installing the sliding sleeve 4 and the rotating shaft 1; a water inlet 33 is provided at the top of the sleeve 3, and an upper water groove 31 with a rectangular long hole is provided below the water inlet 33, and the upper water groove 31 with a rectangular long hole can cover all the water holes 11 on the rotating shaft 1; a groove 35 for installing the pressure plate 9 of the sliding sleeve 4 is provided on the operating side of the sleeve 3 to prevent the axial movement of the sliding sleeve 4 relative to the sleeve 3, and an upper positioning groove 34 for positioning the positioning pin 8 is provided on the matching end surface of the sliding sleeve 4, and a lower positioning groove 43 is provided on the sliding sleeve 4 for cooperating with the upper positioning groove 34 provided on the sleeve 3 for placing the pin 8, so that the radial rotation of the sliding sleeve 4 relative to the sleeve 3 can be limited; a series of water outlets 32 are provided at the bottom of the sleeve 3, and the spacing between any two adjacent water outlets 32 is the same as the spacing between the water holes 11 and the water outlets 42 provided on the rotating shaft 1 and the sliding sleeve 4.

[0031] In this embodiment, the sliding sleeve 4 is a copper sleeve, which is installed between the sleeve 3 and the rotating shaft 1 to play a role in sliding lubrication; the top of the sliding sleeve 4 is provided with a lower water groove 41 with a rectangular long hole identical to the sleeve 3, and covers all the water holes on the rotating shaft 1; the bottom is provided with a series of water outlets 42, and the spacing between any two adjacent water outlets 42 is the same as the spacing between the water holes 11 and the water outlets 32 arranged on the rotating shaft 1 and the sleeve 3.

[0032] The nozzle 5 in this embodiment is used to spray high-pressure water and is installed on the water outlet 32 ​​at the bottom of the sleeve 3. The water inlet pipe 6 is connected to the water inlet 33 at the top of the sleeve 3 for receiving high-pressure water. The support 7 is connected to the sleeve 3 to limit the axial rotation of the sleeve 3 while allowing its radial displacement. The pin 8 is installed in the lower positioning groove 43 and the upper positioning groove 34 of the sleeve 4 and the sleeve 3 to limit the radial rotation of the sleeve 4. The pressure plate 9 is installed on the end surface of the sleeve 3 to press the sleeve 4 and limit the axial movement of the sleeve.

[0033] like Figure 5 , 6 As shown, the descaling device using the above-mentioned energy-saving high-pressure water descaling unit includes a transmission system 100 and an energy-saving high-pressure water descaling unit 200. The energy-saving high-pressure water descaling unit 200 is provided in plurality and corresponds to and is arranged at intervals with respect to the hot-rolled slab 300. The plurality of energy-saving high-pressure water descaling units 200 are all connected to one transmission system 100. The gear motor of the transmission system 100 drives the distribution box that is transmission-connected to the plurality of energy-saving high-pressure water descaling units 200 to drive all the rotating shafts 1 to rotate at the same speed and in the same rotation direction, so that the channels between the water inlet 33 and the nozzle 5 are sequentially and temporarily connected.

[0034] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Obviously, those skilled in the art can make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these modifications and variations.

Claims

1. An energy-saving high-pressure water descaling unit, comprising a rotating shaft (1) and bearing seats (2) arranged on both sides of the rotating shaft, characterized in that, A sleeve (3) with a relative rotational relationship is provided on the rotating shaft. An inlet (33) communicating with the water inlet pipe (6) and outlets (32) respectively corresponding to and communicating with a plurality of nozzles (5) are provided on the sleeve. An upper water trough (31) communicating with the inlet and covering all the outlets is provided on the inner wall of the sleeve along its axial direction. A series of water through holes (11) are provided along the axial direction of the rotating shaft, which can respectively correspond to and communicate with the plurality of outlets provided on the sleeve and are arranged in a staggered manner in a 360° range in the radial direction of the rotating shaft. The series of water through holes can also communicate with the upper water trough. It further includes a sliding sleeve (4) provided between the rotating shaft and the sleeve. A lower water trough (41) communicating with the upper water trough provided on the sleeve and the series of water through holes provided on the rotating shaft is provided on the outer wall of the sliding sleeve along its axial direction. The sliding sleeve is also provided with water through openings (42) respectively corresponding to and communicating with the plurality of outlets provided on the sleeve, and the lower water trough covers all the water through openings. The plurality of water through openings can also respectively correspond to and communicate with the series of water through holes provided on the rotating shaft.

2. The energy-saving high-pressure water descaling unit according to claim 1, wherein The radial angle between two adjacent water through holes is the same.

3. The energy-saving high-pressure water descaling unit according to claim 1, wherein The sleeve and the sliding sleeve are positioned and connected through a pin shaft (8) and a pressing plate (9). The sliding sleeve is rotatably connected to the rotating shaft. An upper positioning groove (34) is provided on the sleeve. A lower positioning groove (43) for placing the pin shaft and cooperating with the upper positioning groove provided on the sleeve is provided on the sliding sleeve. A groove (35) for placing the pressing plate is provided on the sleeve.

4. The energy-saving high-pressure water descaling unit according to claim 3, characterized in that The upper water trough provided on the sleeve covers the lower water trough provided on the sliding sleeve. The upper water trough and the lower water trough are in the structure of rectangular long holes.

5. The energy-saving high-pressure water descaling unit according to claim 1, wherein The cross section of the sleeve is in the structure of a square outside and a circle inside.

6. The energy-saving high-pressure water descaling unit according to claim 1, characterized in that The sleeve is fixedly installed through a support (7).

7. A descaling device applying the energy-saving high-pressure water descaling unit according to any one of claims 1-6.

8. The descaling device according to claim 7, characterized in that, It includes a transmission system (100) and an energy-saving high-pressure water descaling unit (200). The energy-saving high-pressure water descaling units are provided in multiple numbers and are arranged in an up-and-down corresponding and spaced manner relative to the hot-rolled slab (300). The multiple energy-saving high-pressure water descaling units are all connected to one transmission system.

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