A slag blowing gun, a slag continuous cleaning device, and a continuous casting billet cutting and slag cleaning device

Abstract

The present invention discloses a slag blowing gun, a slag continuous cleaning device, and a continuous casting billet cutting and slag cleaning device. The disclosed slag blowing gun comprises a gun barrel, and a slag blowing nozzle mounting section is provided at a local position of the gun barrel; the shape of the slag blowing nozzle mounting section matches the shape of the workpiece to which the slag is attached, and the nozzle mounting section is provided with at least one gas outlet with an outlet facing the workpiece to which the slag is attached; or the nozzle mounting end is provided with at least one gas outlet facing the workpiece to which the slag is attached, and a branch pipe is provided at the gas outlet, and the lengths of the branch pipes at each gas outlet are the same or different. The continuous slag cleaning device comprises a slag blowing gun and a mounting portion movably arranged on a fixing device; the mounting portion moves in the same direction as or synchronously with the moving direction of the processing tool for the slag attached workpiece. At the same time, a continuous casting billet cutting and slag cleaning device equipped with the above-mentioned slag continuous cleaning device is disclosed. The present invention can realize synchronous processing and slag cleaning of moving workpieces.

Description

Technical Field

[0001] The invention relates to workpiece processing and slag cleaning technology in metallurgy and related fields, and in particular to a slag blowing gun, a slag continuous cleaning device and a continuous casting billet cutting and slag cleaning device. Background Art

[0002] In metallurgy, machinery and other related fields, slag will appear during the workpiece processing, affecting subsequent production, so it is necessary to clean the slag on the workpiece surface in time. For example: the continuous casting billet is the product obtained by casting the molten steel from the steelmaking furnace through the continuous casting machine. It is mainly divided into square billets, rectangular billets, slabs, round billets, and special-shaped billets in terms of appearance. In the continuous casting and cutting production, a certain amount of slag will inevitably form at the bottom of the billet after cutting. Before entering the rolling process, if the slag is not cleaned in time, the slag generated during the cutting process will solidify and harden and form many uneven oxide slag holes on the surface of the rolled material, thereby turning the rolled material into defective waste, seriously affecting the quality and yield of the rolled material. At present, the steel industry does not have a slag blowing and cleaning device for round billets. Summary of the invention

[0003] In view of the defects or shortcomings of the prior art, the present invention first provides a slag blowing gun.

[0004] To this end, the slag blowing gun of the present invention comprises a gun barrel, the gun barrel is provided with an air inlet, and a slag blowing nozzle installation section is provided at a local position of the gun barrel;

[0005] The shape of the slag blowing nozzle mounting section matches the outer shape of the workpiece to which the slag is attached, and the nozzle mounting section is provided with at least one gas outlet with its outlet facing the workpiece to which the slag is attached; or, the nozzle mounting end is provided with at least one gas outlet facing the workpiece to which the slag is attached, and a branch pipe is provided at the gas outlet, and the lengths of the branch pipes at each gas outlet are the same or different.

[0006] Optionally, the slag blowing nozzle installation section is arc-shaped, and the inner concave side of the arc-shaped slag blowing nozzle installation section is provided with at least one gas outlet facing the workpiece to which the slag is attached.

[0007] Optionally, an air inlet is provided at one end of the gun barrel, and the nozzle mounting section is provided with more than two gas outlets with outlets facing the slag attachment, and one of the gas outlets is located at the other end of the gun barrel.

[0008] Optionally, the non-slag blowing nozzle installation section of the gun barrel is a straight tube or a bent tube partially provided with at least one bend.

[0009] Optionally, the non-slag blowing nozzle installation section of the gun barrel is a curved pipe with two continuous local 90° bends, and the slag blowing nozzle installation section is arranged at one end after the bend.

[0010] Furthermore, a slag discharge nozzle is installed at the gas outlet.

[0011] Preferably, the slag blowing nozzles are installed at the gas outlet via a universal joint, and the blowing directions of the slag blowing nozzles are the same or different.

[0012] The invention further provides a slag continuous cleaning device.

[0013] To this end, the slag continuous cleaning device provided by the present invention can be arranged on a slag attached workpiece processing device, the slag attached workpiece processing device comprises a fixing device and a slag attached workpiece processing tool movably mounted on the fixing device, the slag continuous cleaning device comprises a slag blowing gun and a mounting portion movably arranged on the fixing device;

[0014] The mounting portion and the slag-attached workpiece processing tool move in the same direction or synchronously;

[0015] The mounting portion is provided with a slag blowing gun mounting structure, on which the slag blowing gun according to claim 1 is movably mounted, and the moving direction of the slag blowing gun is the same as the moving direction of the slag-attached workpiece processing tool.

[0016] Optionally, the mounting portion includes a guide rail, which is movably mounted on the fixing device and extends along a moving direction of the slag-attached workpiece processing tool, and in the moving direction, the guide rail is located in front of the slag-attached workpiece processing tool; the slag blowing gun is movably mounted in the guide rail.

[0017] Furthermore, it also includes a movable vehicle, which can be movably installed on the fixing device, and the movable vehicle is provided with a slag attachment processing tool installation part, and the installation part or the guide rail is installed on the movable vehicle.

[0018] Preferably, the device of the present invention also includes a limiting mechanism, which is fixedly arranged relative to the fixing device or arranged on the fixing device and is located on the movable path of the slag blowing gun. At the same time, the limiting mechanism is close to the processing site; under the action of external force, the slag blowing gun can be stuck into the limiting mechanism to be fixed and detached from the limiting mechanism.

[0019] Optionally, the limiting mechanism includes a limiting plate, a sleeve, a spring, a limiting pin and a limiting block; the limiting plate is fixedly arranged relative to the fixing device or is arranged on the fixing device; the sleeve is arranged on the limiting plate; the spring is arranged in the sleeve, and the compression direction of the spring is consistent with the axial direction in the sleeve, the limiting pin is arranged at one end of the sleeve and connected to the end of the spring, and a first reserved space is arranged between the limiting pin and the limiting plate, the limiting block is fixedly arranged on the slag blowing gun, and during the movement of the slag blowing gun, the limiting block contacts and squeezes the limiting pin so that the limiting block is stuck in the first reserved space and is limited or escapes from the first reserved space.

[0020] Optionally, the limit mechanism includes a limit plate, a sleeve, a spring, a limit pin, a first limit block and a second limit block; the limit plate is fixedly arranged relative to the fixing device or is arranged on the fixing device; the sleeve is arranged on the limit plate; the spring is arranged in the sleeve, and the compression direction of the spring is consistent with the axial direction in the sleeve, the limit pin is arranged at one end of the sleeve and connected to the end of the spring, and a second reserved space is arranged between the limit pin and the limit plate; the first limit block and the second limit block are fixedly arranged on the guide rail in sequence along the guide rail extension method. The invention relates to a movable mounting structure on the guide rail and is independent of the slag blowing gun on the guide rail, wherein the first limit block and the second limit block are respectively installed close to the two ends of the guide rail, and the first limit block and the second limit block both have overlapping intervals with the movable interval of the slag blowing gun on the guide rail, and the overlapping interval distance is at least the diameter of the slag blowing gun. During the movement of the guide rail, the first limit block contacts and squeezes the limit pin so that the slag blowing gun is stuck in the second reserved space and is limited, and the second limit block contacts and squeezes the limit pin so that the slag blowing gun escapes from the second reserved space.

[0021] Preferably, the limit block contacts the arc surface of the limit pin. The limit block includes the above-mentioned limit block, the first limit block and / or the second limit block.

[0022] The invention also provides a continuous casting billet cutting and slag cleaning device.

[0023] To this end, the continuous casting billet cutting and slag cleaning device provided by the present invention comprises a continuous casting billet cutting device, on which the above-mentioned slag continuous cleaning device is installed.

[0024] Preferably, two sets of the above-mentioned slag continuous cleaning devices are symmetrically installed on the continuous casting and cutting device on both sides of the cut ingot.

[0025] The present invention designs a slag blowing gun and related auxiliary components according to the causes, rules and forms of slag formation and on-site processing conditions. The structure is simple and scientific, the cleaning efficiency is high, and the smoothness of the processed surface is ensured. Taking the continuous casting billet cutting working environment as an example, the present invention adopts a three-dimensional slag blowing gun to meet the slag blowing requirements, and further adopts a limit mechanism to provide synchronization between processing and cleaning, while avoiding interference between the slag blowing gun and the roller, ensuring the smoothness of the cut surface, and improving product quality and yield rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a reference schematic diagram of the slag blowing gun structure of the present invention;

[0027] Figure 2 It is a schematic diagram of the slag blowing device or the continuous casting billet cutting and blowing device of the present invention (schematic diagram of the initial state);

[0028] Figure 3 It is a structural schematic diagram of the continuous casting billet cutting and slag blowing device of the present invention when performing cutting and slag discharging work;

[0029] Figure 4 This is a schematic diagram of the cutting gun's return process after the slag blowing and cutting are completed;

[0030] Figure 5 It is a schematic diagram of the cutting gun returning to the initial state;

[0031] Figure 6 This is an enlarged view of one end of the limit mechanism;

[0032] Figure 7 This is an enlarged view of the other end of the limit mechanism;

[0033] Figure 8 It is a schematic diagram of the limiting structure. DETAILED DESCRIPTION

[0034] Unless otherwise specified, the terms herein are understood according to the conventional understanding of one of ordinary skill in the relevant art.

[0035] The directions or orientations such as “upper”, “lower”, “front”, “rear”, and “axial” described herein are consistent with the corresponding directions or orientations in the drawings.

[0036] The slag-attached workpiece (also referred to herein as workpiece) of the present invention refers to a workpiece in the fields of machinery, metallurgy, etc., which has slag attached or hanging thereon during or after the workpiece processing. The slag, also referred to as hanging slag, is the slag or burr generated during the workpiece processing process, such as the molten steel and its oxides generated during the flame cutting process of the continuous casting billet, which are attached to the lower end of the cut section of the continuous casting billet to form slag or burr; the slag blowing gun and cleaning device of the present invention can be used to remove the slag attached to the workpiece, such as but not limited to the cut billet, the billet in the cutting process, or the continuous casting billet.

[0037] The slag-attached workpiece processing device (also referred to as the processing device herein) described in the present invention refers to a device for performing corresponding processing on the slag-attached workpiece in motion, and the "processing" includes but is not limited to cutting. The corresponding processing device is a cutting device, which includes a fixing device and a slag-attached workpiece processing tool (also referred to as the processing tool herein) movably installed on the fixing device, wherein the fixing device generally plays the role of installation and support, and the specific structure is a support frame or support seat that meets the actual site and operation requirements; the processing tool is a slag-attached workpiece processing tool that directly performs the "processing" action, and its movably installed on the fixing device is to meet the needs of the workpiece movement state, that is, to realize the processing of the workpiece during the movement of the workpiece. The movable installation can select the conventional movable installation method in the mechanical field, or the processing tool can be movably installed with the aid of other movable parts, such as a movable car.

[0038] Taking the continuous casting billet flame cutting device as an example, the continuous casting billet flame cutting device is used to cut the continuous casting billet 5 in the process of being transported forward on the continuous casting roller 3. Figure 2 The device specifically includes a fixed bracket 41, a flame cutting gun 42 and a driving device. Specifically, the fixed bracket 41 is fixedly installed above the continuous casting roller 3, and a track is arranged on the fixed bracket, and the extension direction of the track is consistent with the movement direction of the continuous casting billet on the continuous casting roller. The flame cutting gun and the driving device are installed on the bracket guide rail through a movable trolley 43, and the driving device is installed in the movable trolley 43. The flame cutting gun 42 is installed at the bottom of the movable trolley 43, and the movable trolley 43 is set on the track. The flame cutting gun 42 is located above the continuous casting roller 3. When the continuous casting billet 5 is conveyed forward on the roller, the cutting gun cuts the continuous casting billet.

[0039] The shape of the slag blowing nozzle installation section of the slag blowing gun of the present invention matches the shape of the workpiece to which the slag is attached, ensuring that the airflow in the slag blowing nozzle can be properly blown onto the surface of the workpiece, and the slag on the surface of the workpiece can be effectively cleaned in all directions. For example, but not limited to, an arc shape that matches the shape of the continuous casting round billet. Further to achieve this effect, the slag blowing nozzle installation end is provided with a plurality of gas outlets, i.e., nozzle installation parts, to achieve effective cleaning of the slag. In a further solution, one of the gas outlets is located at the end of the gun barrel.

[0040] On the basis of the above scheme, the same as the above scheme is that, in order to achieve all-round effective cleaning of the slag on the surface of the workpiece, the slag blowing nozzle installation section is provided with at least one gas outlet facing the workpiece, and each gas outlet is provided with a branch pipe of different lengths or the same lengths. In a further scheme, the line shape or surface shape formed by the outlet sides of the branch pipes of different lengths or the same lengths matches the shape of the workpiece, such as an arc line shape or an arc surface shape.

[0041] In some schemes, in order to achieve cooperation with other processing parts, such as but not limited to cooperation with workpiece cutting devices, that is, cutting and slag cleaning are carried out synchronously or simultaneously, it is necessary to ensure that the cutting gun and the slag blowing gun are located in the same plane when working. In order to cooperate with the work of related moving workpieces, tools and / or devices, the non-slag blowing nozzle installation section on the slag blowing gun barrel can be designed as a bent pipe structure, and the upper local section thereof is bent toward the direction of other working parts such as the cutting gun, so that the upper section of the gun barrel is close to the cutting gun on the structural upper line. Specifically, two 90° bends can occur, such as Figure 1 As shown, the slag blowing nozzle installation end is arranged below the bending position. Moreover, when used on the continuous casting billet cutting device, the gun barrel is provided with an arc or / and bending structure, which can also avoid the interference of the roller wheel on the movement of the slag blowing gun and the slag blowing.

[0042] In a further solution, a slag blowing nozzle is installed at the gas outlet of the gun barrel. In a preferred solution, to ensure that the slag blowing airflow is effectively blown onto the workpiece surface, the slag blowing nozzle is installed at the gas outlet through a universal joint, and when working, the direction can be adjusted according to the shape of the workpiece such as a steel billet, and the blowing directions of each slag blowing nozzle are the same or different.

[0043] like Figure 1 As shown in the figure, it is a specific example of a slag blowing gun. The shape of the slag blowing gun shown in this example is different in different directions. Figure 1 As shown in the left and right figures in the figure, the upper end of the barrel 11 is an air inlet, and the lower end is provided with a slag blowing nozzle mounting section 12. To match the shape of the cylindrical continuous casting billet, the slag blowing nozzle mounting end is arc-shaped. To achieve synchronous cutting and slag cleaning of the moving continuous casting billet, that is, to ensure that the cutting part and the slag blowing part are in the same plane or synchronized in real time, two 90° bends are provided at the lower middle part of the barrel, and the slag blowing nozzle mounting end is provided at the lower part after the bend. From the front-to-back direction, the slag blowing nozzle mounting end 12 is rearward relative to the air inlet; two nozzle mounting ports are provided on the concave side of the slag blowing nozzle mounting end 12, and a slag blowing nozzle 13 is installed at each nozzle mounting port through a universal joint 14, so that the direction of the nozzle can be adjusted accordingly during the slag blowing process.

[0044] The slag continuous cleaning device of the present invention comprises a mounting portion movably arranged on a fixing device of a slag-attached workpiece processing device and a slag blowing gun movably arranged on the mounting portion. In a specific scheme, the mounting portion is a guide rail structure, and the extension direction of the guide rail is consistent with the movement direction of the processing component, that is, the movement direction of the slag blowing gun is consistent with the movement direction of the processing component.

[0045] Taking the continuous slag cleaning device used in the continuous casting billet cutting device as an example, Figure 2As shown, the device includes a guide rail 21 and a slag blowing gun 1. The guide rail 21 is arranged at the front end face of the movable carriage 43 along the moving direction of the continuous casting billet, and the guide rail is located in front of the cutting gun 42. The slag blowing gun 1 is suspended in the guide rail 21 and can move forward and backward in the guide rail; in this way, when the movable carriage moves forward, the guide rail moves forward, and the slag blowing gun does not move or moves backward until the cutting part (the cutting part is determined according to the length and size requirements of the casting billet) is located in the same plane with the cutting gun and the slag blowing gun, and cutting and slag blowing are performed in the same part. In a further scheme, in order to avoid the loss of the slag blowing gun during the movement, the slag blowing gun may not be in direct contact with the guide rail, but may be suspended in the guide rail through a fixed sleeve 15 whose cross-sectional area is larger than the track width.

[0046] refer to Figure 2-5 The specific working process is explained as follows:

[0047] Figure 2 In the initial state shown, the cutting carriage carries the cutting gun and moves in the direction of the billet conveying;

[0048] When the cutting gun moves to the same plane as the slag blowing gun, cutting and slag blowing operations are performed;

[0049] After the cutting and slag blowing operations are completed, the billet continues to be transported forward;

[0050] The cutting carriage, cutting gun and slag blowing gun begin to return to the starting position to carry out the next cycle of cutting and slag blowing operations.

[0051] In order to achieve stable suspension of the slag blowing gun, two upper and lower guide rails are provided, and the slag blowing gun vertically passes through the two guide rails and is suspended therein.

[0052] In the further solution, in order to achieve all-round slag blowing, refer to Figure 2 As shown, two sets of the above-mentioned slag blowing and cleaning devices are symmetrically arranged at the front section of the movable carriage, and when working, the two sets of slag blowing and cleaning devices are symmetrically located on both sides of the cutting gun 42. The specific working process is as follows:

[0053] Figure 2 In the initial state shown, the cutting carriage carries the cutting gun and moves in the direction of the billet conveying;

[0054] When the cutting gun moves to the same plane as the slag blowing gun, the slag blowing gun on one side of the cutting gun starts the slag blowing operation;

[0055] When the round billet is cut to the highest point on the top of the round billet, the slag blowing gun on the other side starts the slag blowing operation;

[0056] After the cutting and slag blowing operations are completed, the billet continues to be transported forward;

[0057] The cutting carriage, cutting gun and slag blowing gun begin to return to the starting position to carry out the next cycle of cutting and slag blowing operations.

[0058] To further ensure that slag blowing is carried out simultaneously with processing of the processing tool, a limiting mechanism is provided on the above-mentioned device, which is fixedly arranged relative to the fixing device or directly arranged on the fixing device, and is located on the movable path of the slag blowing gun, and the limiting mechanism is close to the position where processing occurs; the slag blowing gun is stuck in the limiting mechanism as the initial state, when the processing tool moves forward, the slag blowing gun is fixed in the limiting mechanism, and the mounting part and the processing tool move forward together, and when the moving mounting part and the slag blowing gun are in the maximum free position of movement relative to each other, under the action of the thrust of the mounting part, the slag blowing gun escapes from the limiting mechanism and moves forward together with the processing tool, thereby ensuring that the processing tool and the slag blowing nozzle on the slag blowing gun are both located at the processing section.

[0059] An example of a limiting mechanism includes a limiting plate, a sleeve, a spring, a limiting pin and a limiting block; the limiting plate is arranged on the fixed bracket; the sleeve is arranged on the limiting plate; the spring is arranged in the sleeve, and the compression direction of the spring is consistent with the axial direction in the sleeve, the limiting pin is arranged at one end of the sleeve and connected to the end of the spring, and a first reserved space is arranged between the limiting pin and the limiting plate, the limiting block is fixedly arranged on the slag blowing gun, and during the movement of the slag blowing gun, the limiting block contacts and squeezes the limiting pin so that the limiting block is stuck in the first reserved space and is limited or escapes from the first reserved space.

[0060] Another example of a limiting mechanism is as follows Figure 6-8 As shown, the limit block in the limit mechanism is not arranged on the slag blowing gun, and specifically includes a limit plate 221, a sleeve 222, a spring 223, a limit pin 224, a first limit block 2251 and a second limit block 2252. The limit plate 221 is relatively fixedly installed on the bracket, and the sleeve 222 is arranged on the limit plate; the spring 223 is arranged in the sleeve 222, and the compression direction of the spring is consistent with the axial direction in the sleeve, the limit pin is arranged at one end of the sleeve and connected to the end of the spring, and a second reserved space is arranged between the limit pin and the limit plate;

[0061] The first limit block 2251 and the second limit block 2252 are fixedly arranged on the guide rail in sequence along the guide rail extension method and are independent of the movable mounting structure of the slag blowing gun on the guide rail, that is, the first limit block and the second limit block do not directly act on the slag blowing gun or do not contact the slag blowing gun, and the first limit block and the second limit block are respectively arranged close to the two ends of the guide rail, and at the same time, the first limit block and the second limit block do not exceed the movable range of the slag blowing gun on the guide rail, and the distance of the interval not exceeded is at least the diameter of the slag blowing gun; the specific solution is that the length of each limit block along the movable direction of the slag blowing gun is The length is the overlapping interval distance or slightly larger than the overlapping interval distance; or larger than the overlapping interval distance. During installation, part of the structure exceeds the movable interval and part does not exceed the movable interval of the slag blowing gun on the guide rail. The interval distance that does not exceed is at least the diameter of the slag blowing gun, so that the slag blowing gun first contacts the end of the guide rail during the movement of the guide rail; during the movement of the guide rail, the first limit block contacts the limit pin and squeezes the limit pin so that the slag blowing gun is stuck in the second reserved space and is limited, and the second limit block contacts the limit pin and squeezes the limit pin so that the slag blowing gun escapes from the second reserved space.

[0062] When working, start Figure 2 In the initial state shown, the slag blowing gun is stuck in the second reserved space by the limiting plate and the limiting pin, with the moving direction of the continuous casting billet as the front, the first limiting block 2251 is located in front of the limiting pin, and the limiting pin is located in front of the slag blowing gun;

[0063] When the guide rail 21 starts to move driven by the trolley, the slag blowing gun 1 is fixed by the limit pin and the limit plate and cannot move, and keeps sliding relative to the guide rail 21;

[0064] When the guide rail moves to the other end and the maximum limit position of the slag blowing gun, at the same time, the limit pin 224 is squeezed by the second limit block 2252, and the slag blowing gun is pushed out of the limit mechanism, moves forward synchronously with the trolley and starts cutting and slag blowing;

[0065] After completing the cutting and slag blowing work, the trolley starts to move back until the slag blowing gun contacts the other end of the guide rail, and moves with the slag blowing gun to the second limit block and the limit pin to contact and squeeze the limit pin, so that the slag blowing gun is stuck between the limit pin and the limit plate and returns to the starting state.

[0066] On the basis of the above scheme, or in a further scheme, the limit block (or the first limit block and the second limit block) is a semicircular plate, and the end of the limit pin is provided with a spherical shape, so that the semicircular plate side wall slides in contact with the spherical surface when the two move.

[0067] Furthermore, in the actual solution, the length of the guide rail of the present invention is within a reasonable range to limit the range of motion of the slag blowing gun and improve the synchronous working efficiency of processing and slag blowing. For example, in the continuous casting billet cutting device, the length of the track can be selected to be 750-850mm according to the original motion range length of the trolley, taking an existing production situation as an example. At the same time, through the limitation of the limited length of the limit mechanism and the guide rail, it is possible to selectively limit the operation of the slag blowing gun to a certain range, that is, limit the range of motion of the slag blowing gun to avoid roller interference.

[0068] In a further solution, the slag blowing gun is connected to a gas source, and the gas source can be selected from nitrogen, compressed air or inert gas. In a specific solution, the gas source pressure can be selected between 0.3-1.0MPa.

[0069] It should be noted that, in the above specific implementation scheme, the initial state and the return state are working states defined for further explanation of the scheme of the present invention, and are not limitations on the scheme of the present invention. Equivalent combinations and improvements made by those skilled in the art based on the concept of the present invention are within the spirit of the present invention.

Claims

1. A slag continuous cleaning device, which can be arranged on a slag attached workpiece processing device, the slag attached workpiece processing device comprising a fixing device and a slag attached workpiece processing tool movably mounted on the fixing device, characterized in that: The continuous slag cleaning device comprises a slag blowing gun and a mounting portion movably arranged on a fixing device; The mounting portion and the slag-attached workpiece processing tool move in the same direction or synchronously; The mounting portion is provided with a slag blowing gun mounting structure, on which a slag blowing gun is movably mounted, and the moving direction of the slag blowing gun is the same as the moving direction of the slag-attached workpiece processing tool; The slag blowing gun comprises a gun barrel, an air inlet is arranged on the gun barrel, and a slag blowing nozzle mounting section is arranged at a local position of the gun barrel; the shape of the slag blowing nozzle mounting section matches the shape of the workpiece to which the slag is attached, and the nozzle mounting section is provided with at least one gas outlet with an outlet facing the workpiece to which the slag is attached; or, the nozzle mounting section is provided with at least one gas outlet facing the workpiece to which the slag is attached, and a branch pipe is arranged at the gas outlet, and the lengths of the branch pipes at each gas outlet are the same or different; The slag continuous cleaning device also includes a limiting mechanism, which is fixedly arranged relative to the fixing device or arranged on the fixing device and is located on the movable path of the slag blowing gun, and the limiting mechanism is close to the processing location; under the action of external force, the slag blowing gun can be stuck into the limiting mechanism to be fixed and detached from the limiting mechanism; The limiting mechanism comprises a limiting plate, a sleeve, a spring, a limiting pin and a limiting block; The limiting plate is fixedly arranged relative to the fixing device or is arranged on the fixing device; The sleeve is arranged on the limiting plate; The spring is arranged in the sleeve, and the compression direction of the spring is consistent with the axial direction in the sleeve. The limit pin is arranged at one end of the sleeve and connected to the end of the spring. At the same time, a first reserved space is arranged between the limit pin and the limit plate. The limit block is fixedly arranged on the slag blowing gun, and during the movement of the slag blowing gun, the limit block contacts and squeezes the limit pin so that the limit block is stuck in the first reserved space to be limited or escapes from the first reserved space.

2. The continuous slag cleaning device according to claim 1, characterized in that: The slag blowing nozzle installation section is in an arc shape, and the inner concave side of the arc-shaped slag blowing nozzle installation section is provided with at least one gas outlet with its outlet facing the workpiece to which the slag is attached.

3. The continuous slag cleaning device according to claim 1, characterized in that: An air inlet is arranged at one end of the gun barrel, and the nozzle mounting section is provided with more than two gas outlets with outlets facing the slag attachment, wherein one of the gas outlets is located at the other end of the gun barrel.

4. The continuous slag cleaning device according to claim 1, characterized in that: The non-slag blowing nozzle installation section of the gun barrel is a straight tube or a bent tube partially provided with at least one bend.

5. The continuous slag cleaning device according to claim 1, characterized in that: The non-slag blowing nozzle installation section of the gun barrel is a curved pipe with two continuous local 90° bends, and the slag blowing nozzle installation section is arranged at one end after the bend.

6. The continuous slag cleaning device according to any one of claims 1 to 5, characterized in that: A slag blowing nozzle is installed at the gas outlet.

7. The continuous slag cleaning device according to claim 6, characterized in that: The slag blowing nozzles are installed at the gas outlet through a universal joint, and the blowing directions of the slag blowing nozzles are the same or different.

8. The continuous slag cleaning device according to claim 1, characterized in that: The mounting portion includes a guide rail, which is movably mounted on the fixing device and extends along the moving direction of the slag-attached workpiece processing tool. In the moving direction, the guide rail is located in front of the slag-attached workpiece processing tool; the slag blowing gun is movably mounted in the guide rail.

9. The continuous slag cleaning device according to claim 8, characterized in that: It also includes a movable vehicle, which can be movably installed on the fixing device. The movable vehicle is provided with a slag attachment processing tool installation portion, and the installation portion or the guide rail is installed on the movable vehicle.

10. The continuous slag cleaning device according to claim 1, characterized in that: The limiting mechanism comprises a limiting plate, a sleeve, a spring, a limiting pin, a first limiting block and a second limiting block; The limiting plate is fixedly arranged relative to the fixing device or is arranged on the fixing device; The sleeve is arranged on the limiting plate; The spring is arranged in the sleeve, and the compression direction of the spring is consistent with the axial direction in the sleeve. The limit pin is arranged at one end of the sleeve and connected to the end of the spring, and a second reserved space is arranged between the limit pin and the limit plate; The first limit block and the second limit block are fixedly arranged on the guide rail in sequence along the guide rail extension method and are independent of the movable mounting structure of the slag blowing gun on the guide rail. The first limit block and the second limit block are respectively installed close to the two ends of the guide rail, and at the same time, the first limit block and the second limit block have overlapping intervals with the movable interval of the slag blowing gun on the guide rail, and the overlapping interval distance is at least the diameter of the slag blowing gun. During the movement of the guide rail, the first limit block contacts and squeezes the limit pin so that the slag blowing gun is stuck in the second reserved space and is limited, and the second limit block contacts and squeezes the limit pin so that the slag blowing gun escapes from the second reserved space.

11. The continuous slag cleaning device according to claim 1 or 10, characterized in that: The limiting block contacts the arc surface of the limiting pin.

12. A continuous casting billet cutting and slag cleaning device, comprising a continuous casting billet cutting device, characterized in that: The continuous casting billet cutting device is equipped with the slag continuous cleaning device according to claim 1, 2, 3, 4, 5, 8 or 10.

13. The continuous casting slab cutting and slag cleaning device according to claim 12, characterized in that: The continuous casting billet cutting device is symmetrically provided with two sets of slag continuous cleaning devices as claimed in claim 1, 2, 3, 4, 5, 8 or 10 on both sides of the billet to be cut.

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