Descaling box capable of preventing scale from splashing

Abstract

The utility model discloses a descaling box capable of preventing scale from splashing, which belongs to the technical field of metallurgy and comprises a descaling box and a door curtain, the descaling box comprises a hollow box body and a plurality of high-pressure nozzles arranged on the inner wall of the box body, openings are arranged in the middle of the front side and the middle of the back side of the box body, and roller ways are positioned in the openings and penetrate through the box body. The high-pressure nozzles are connected with the water tank through water conveying pipes penetrating through the wall of the box body. And door curtains are arranged on the two openings. The steel billet descaling device has the beneficial effects that the high-pressure nozzle is used for removing oxide scale on the surface of a steel billet, and the door curtain arranged on the descaling box is matched, so that the oxide scale can be effectively prevented from splashing out of the descaling box; and small scale particles can be fully flushed by water flow in the descaling box for sufficient sealing time to be mixed into the slag flushing trough.

Description

Technical Field

[0001] The utility model relates to the technical field of metallurgy, in particular to a descaling box for preventing splashing of oxidized iron scale. Background Art

[0002] When steel is heated in a high-temperature furnace, its surface will oxidize due to the large amount of oxidizing gas in the furnace, thus forming a layer of iron oxide scale on the surface of the steel billet. If the iron oxide scale cannot be removed in time during the rolling process of the steel billet and is pressed into the steel surface, it will cause pitting on the steel surface and damage the surface quality. Therefore, removing the surface iron oxide scale of the steel billet out of the furnace is an important step at the front end of the steel rolling production line, which plays a key role in improving the quality of the strip coil and the appearance of the finished product.

[0003] In the prior art, a high-pressure water gun is usually used to remove the residual oxide layer on the surface of the steel billet. During descaling, the iron oxide scale on the surface of the steel billet will splash around under the impact of the high-pressure water flow and cannot be completely collected by the slag flushing ditch, resulting in an increase in the cleaning cost of the workshop, and the relatively fine iron oxide scale particles will be suspended in the workshop, posing a greater threat to the respiratory health of the workers. For example, the utility model patent with announcement number CN220479751U discloses a steel billet descaling device, including: a high-pressure air source and a nozzle, wherein the high-pressure air source is connected to the nozzle, and the nozzle is used to descale the steel billet. This solution uses a descaling hood in combination with water vapor to flush the iron oxide scale into the ditch, but during the descaling process, the iron oxide scale will still fly out from the junction of the descaling hood and the steel billet conveying roller. Utility Model Content

[0004] In order to overcome the problems in the prior art that when descaling steel billets, iron oxide scale splashes everywhere under the impact of high-pressure water flow and is difficult to collect, and smaller iron oxide scale particles are suspended in the air and pollute the workshop environment, the utility model provides a descaling box that can prevent iron oxide scale from splashing, which is installed on a roller table and is used to remove the residual oxide layer on the steel billet, and comprises a descaling box and a door curtain. The descaling box comprises a hollow box body and a plurality of high-pressure nozzles arranged on the inner wall of the box body, openings are arranged in the middle of the front side and the middle of the back side of the box body, the roller table is located in the opening and passes through the box body, and the plurality of high-pressure nozzles are connected to the water tank through a water pipe passing through the body wall of the box body; door curtains are arranged on the two openings.

[0005] The water stored in the water tank is sprayed onto the steel billet on the roller table through a high-pressure nozzle to remove the iron oxide scale on the surface of the steel billet. In combination with the door curtain installed on the descaling box, the iron oxide scale can be effectively prevented from splashing out of the descaling box, and smaller iron oxide scale particles can have sufficient sealing time in the descaling box to be fully washed by the water flow and mixed into the slag flushing ditch.

[0006] Preferably, the door curtain is arranged at a position directly above the roller, and the end of the door curtain close to the roller is a movable end, and the movable end is composed of several long strips. The design of several separated long strips can make the door curtain adaptable to the shapes of steel billets of different specifications to the maximum, and prevent the steel billet from causing the entire door curtain to shift, resulting in a large gap between the door curtain and the opening of the descaling box, causing the oxidized iron scale to fly out.

[0007] Preferably, a friction block is provided at the bottom of the door curtain, and the distance between the lower surface of the friction block and the upper surface of the roller is 1 to 10 cm. By providing a friction block in contact with the surface of the steel billet at the lower end of the door curtain, the iron oxide scale adhering to the surface of the steel billet is caused to fall off under the action of the friction block due to friction during the transportation of the steel billet, thereby enhancing the descaling effect of the descaling box.

[0008] Preferably, a counterweight is provided inside the door curtain near one end of the roller, and a counterweight is installed at the lower end of the door curtain, so that the door curtain has a certain weight to avoid large gaps caused by splashing of water, movement of steel billets and other external forces.

[0009] Preferably, the door curtain is made of a flexible high temperature resistant material, which can adapt to the shape of the steel billet with the long strip movable end while preventing the door curtain from contacting the high temperature steel billet and causing burning.

[0010] Preferably, the high-pressure nozzle is installed on the inner wall of the box and is perpendicular to the length direction of the roller table.

[0011] Preferably, the angle between the central axis of the plurality of high-pressure nozzles located on the top of the box and the upper surface of the box is 45-90°; the angle between the central axis of the plurality of high-pressure nozzles located on the side wall of the box and the side wall of the box is 30-90°.

[0012] The iron oxide scale on the surface of the steel billet can be fully washed away by high-pressure nozzles arranged on the inner wall of the box along the length direction of the roller and at a certain angle to the inner wall of the box.

[0013] Preferably, a filter is provided at one end of the water pipe close to the water tank. The filter provided at the water pipe outlet can effectively block the oxidized iron scale in the slag flushing ditch, preventing the oxidized iron scale from entering the water pipe and the nozzle and causing blockage. The slag flushing ditch can be used as a water tank, so that the turbid water in the slag flushing ditch can be recycled, reducing production costs and increasing environmental protection.

[0014] Preferably, the number of the high-pressure nozzles is 5 to 10, which enhances the ability of the descaling box to remove iron oxide scale.

[0015] Preferably, a pressure pump is provided on the water delivery pipe, and the water pressure sprayed by the high-pressure nozzle is 10-20 MPa. The water pressure is increased by the pressure pump to enhance the impact force of the water flow, thereby enhancing the removal of iron oxide.

[0016] Beneficial effects:

[0017] The beneficial effects produced by adopting the technical solution of the utility model are as follows:

[0018] (1) The water stored in the water tank is sprayed onto the steel billet on the roller table through a high-pressure nozzle to remove the iron oxide scale on the surface of the steel billet. In combination with the door curtain installed on the descaling box, the iron oxide scale can be effectively prevented from splashing out of the descaling box, and the smaller iron oxide scale particles can have sufficient sealing time in the descaling box to be fully washed by the water flow and mixed into the slag flushing ditch.

[0019] (2) The design of the partition strip at the movable end can maximize the adaptability of the door curtain to the shape of steel billets of different specifications, preventing the entire door curtain from being displaced due to the steel billet, resulting in a large gap between the door curtain and the opening of the descaling box, causing the oxidized iron scale to fly out.

[0020] (3) The filter screen installed at the water pipe outlet can effectively block the oxidized iron scale in the slag flushing ditch, preventing the oxidized iron scale from entering the water pipe and nozzle and causing blockage. The slag flushing ditch can be used as a water tank, so that the turbid water in the slag flushing ditch can be recycled, reducing production costs and increasing environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the overall structure of the descaling box for preventing the splashing of oxidized iron scale of the utility model;

[0023] Figure 2 It is a schematic diagram of the door curtain structure of the descaling box for preventing the splashing of oxidized iron scale of the utility model;

[0024] Figure 3 It is a schematic diagram of the opening structure of the water delivery pipe of the descaling box for preventing the splash of oxidized iron scale of the utility model near one end of the water tank;

[0025] Figure 4 The utility model is a schematic diagram of the cross-sectional structure of a descaling box for preventing splashing of oxidized iron scale.

[0026] In the figure: 1. box body; 2. opening; 3. door curtain; 4. roller table; 5. water pipe; 6. water tank; 7. pressure pump; 8. counterweight; 9. friction block; 10. filter screen; 11. high-pressure nozzle. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0028] This embodiment uses a high-pressure nozzle to spray water stored in the water tank to the steel billet on the roller table to remove the iron oxide scale on the surface of the steel billet. In combination with the door curtain set on the descaling box, it can effectively prevent the iron oxide scale from splashing out of the descaling box, and allow smaller iron oxide scale particles to have sufficient sealing time in the descaling box to be fully washed and mixed into the slag flushing groove by the water flow. The specific implementation is as follows:

[0029] like Figures 1 to 4 As shown, a descaling box for preventing oxidized iron scale from splashing is installed on a roller 4 and is used to remove the residual oxide layer on the steel billet. It includes a descaling box and a door curtain 3. The descaling box includes a hollow box body 1 and a plurality of high-pressure nozzles 11 arranged on the inner wall of the box body 1. Openings 2 are arranged in the middle of the front and the middle of the back of the box body 1. The roller 4 is located in the opening 2 and the roller 4 passes through the box body 1. The plurality of high-pressure nozzles 11 are connected to the water tank 6 through a water pipe 5 that passes through the body wall of the box body 1; door curtains 3 are arranged on the two openings 2.

[0030] The water stored in the water tank 6 is sprayed onto the steel billet on the roller 4 through the high-pressure nozzle 11 to remove the iron oxide scale on the surface of the steel billet. In combination with the door curtain 3 arranged on the descaling box, the iron oxide scale can be effectively prevented from splashing out of the descaling box, and smaller iron oxide scale particles can have sufficient sealing time in the descaling box to be fully washed by the water flow and mixed into the slag flushing ditch.

[0031] Specifically, the door curtain 3 is arranged at a position directly above the roller 4, and the end of the door curtain 3 close to the roller 4 is a movable end, and the movable end is composed of several long strips. The design of several separated long strips can make the door curtain 3 adaptable to the shapes of steel billets of different specifications to the maximum, and prevent the steel billet from causing the entire door curtain 3 to be displaced, resulting in a large gap between the door curtain 3 and the descaling box opening 2, causing the oxidized iron scale to fly out.

[0032] Specifically, a friction block 9 is provided at the bottom of the door curtain 3, and the distance between the lower surface of the friction block 9 and the upper surface of the roller 4 is 1 to 10 cm. By providing the friction block 9 in contact with the surface of the steel billet at the lower end of the door curtain 3, the iron oxide scale adhered to the surface of the steel billet is caused to fall off under the action of the friction block 9 due to friction during the transportation of the steel billet, thereby enhancing the descaling effect of the descaling box.

[0033] Specifically, a counterweight block 8 is arranged inside the door curtain 3 near the roller 4, and a counterweight block 8 is installed at the lower end of the door curtain 3, so that the door curtain 3 has a certain weight to avoid large gaps due to splashing of water, movement of steel billets and other external forces.

[0034] Specifically, the door curtain 3 is made of a flexible high-temperature resistant material, which can adapt to the shape of the steel billet with the long strip-shaped movable end while preventing the door curtain 3 from contacting the high-temperature steel billet and causing burning.

[0035] Specifically, the high-pressure nozzle 11 is installed on the inner wall of the box body 1 and is perpendicular to the length direction of the roller table 4 .

[0036] Specifically, the angle between the central axis of the plurality of high-pressure nozzles 11 located on the top of the box 1 and the upper surface of the box 1 is 45 to 90°; the angle between the central axis of the plurality of high-pressure nozzles 11 located on the side wall of the box 1 and the side wall of the box 1 is 30 to 90°.

[0037] The iron oxide scale on the surface of the steel billet can be fully washed away by the high-pressure nozzles 11 arranged on the inner wall of the box body 1 along the length direction of the roller table 4 and at a certain angle to the inner wall of the box body 1 .

[0038] Specifically, a filter screen 10 is provided at one end of the water pipe 5 close to the water tank 6. The filter screen 10 provided at the mouth of the water pipe 5 can effectively block the oxidized iron scale in the slag flushing ditch, preventing the oxidized iron scale from entering the water pipe 5 and the nozzle to cause blockage. The slag flushing ditch can be used as a water tank 6, so that the turbid water in the slag flushing ditch can be recycled, reducing production costs and increasing environmental protection.

[0039] Specifically, the number of the high-pressure nozzles 11 is 5 to 10, which enhances the ability of the descaling box to remove iron oxide scale.

[0040] Specifically, a pressure pump 7 is provided on the water delivery pipe 5, and the water pressure sprayed by the high-pressure nozzle 11 is 10-20 MPa. The water pressure is increased by the pressure pump 7 to enhance the impact force of the water flow, thereby enhancing the removal of iron oxide scale.

[0041] Working principle: The steel billet is transported to the descaling box via a roller conveyor. When the steel billet enters the descaling box, the iron oxide scale on the surface of the steel billet that is easier to remove is rubbed off by the friction block at the lower end of the door curtain at the entrance. The slag flushing water in the slag flushing ditch is filtered by the filter and then sprayed from the high-pressure nozzle to the steel billet through the water pipe under the action of the pressure pump. The water with high pressure and impact force sprayed from the high-pressure nozzle removes the iron oxide scale on the surface of the steel billet that is difficult to remove. Subsequently, the iron oxide scale remaining on the surface of the steel billet is further removed by the friction block at the lower end of the door curtain at the exit. In this process, the door curtains set at both ends of the descaling box block the splashing iron oxide scale and slag flushing water, and allow the fine iron oxide scale particles to have enough time to mix with the splashing water droplets in the closed area and flow into the slag flushing ditch along with other iron oxide scales and water flow.

[0042] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A descaling box for preventing iron oxide scale from splashing, installed on a roller table (4) for removing the residual oxide layer on the steel billet, characterized in that: The descaling box comprises a descaling box and a door curtain (3), wherein the descaling box comprises a hollow box body (1) and a plurality of high-pressure nozzles (11) arranged on the inner wall of the box body (1), openings (2) are arranged in the middle of the front side and the middle of the back side of the box body (1), the roller conveyor (4) is located in the openings (2) and the roller conveyor (4) passes through the box body (1), and the plurality of high-pressure nozzles (11) are connected to a water tank (6) via a water pipe (5) passing through the body wall of the box body (1); and door curtains (3) are arranged on the two openings (2).

2. A descaling box for preventing splashing of oxidized iron scale according to claim 1, characterized in that: The door curtain (3) is arranged at a position directly above the roller conveyor (4); one end of the door curtain (3) close to the roller conveyor (4) is a movable end, and the movable end is composed of a plurality of long strips.

3. A descaling box for preventing splashing of oxidized iron scale according to claim 1, characterized in that: A friction block (9) is provided at the bottom of the door curtain (3), and the distance between the lower surface of the friction block (9) and the upper surface of the roller (4) is 1 to 10 cm.

4. A descaling box for preventing splashing of oxidized iron scale according to claim 1, characterized in that: A counterweight block (8) is arranged inside the door curtain (3) near one end of the roller conveyor (4).

5. A descaling box for preventing splashing of oxidized iron scale according to claim 1, characterized in that: The door curtain (3) is made of a flexible high-temperature resistant material.

6. A descaling box for preventing splashing of oxidized iron scale according to claim 1, characterized in that: The high-pressure nozzle (11) is installed on the inner wall of the box (1) and is perpendicular to the length direction of the roller conveyor (4).

7. A descaling box for preventing splashing of oxidized iron scale according to claim 6, characterized in that: The angle between the central axes of the plurality of high-pressure nozzles (11) located on the top of the box (1) and the upper surface of the box (1) is 45 to 90 degrees; the angle between the central axes of the plurality of high-pressure nozzles (11) located on the side wall of the box (1) and the side wall of the box (1) is 30 to 90 degrees.

8. A descaling box for preventing splashing of oxidized iron scale according to claim 1, characterized in that: A filter screen (10) is provided at one end of the water delivery pipe (5) close to the water tank (6).

9. A descaling box for preventing splashing of oxidized iron scale according to claim 1, characterized in that: The number of the high-pressure nozzles (11) is 5 to 10.

10. A descaling box for preventing splashing of oxidized iron scale according to claim 1, characterized in that: The water delivery pipe (5) is provided with a pressure pump (7), and the water pressure of the water sprayed by the high-pressure nozzle (11) is 10-20 MPa.

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