Cutting knot removing device for continuous casting cutting trolley

Abstract

The utility model relates to steel billet cutting equipment in a continuous casting operation area of a steel plant, in particular to a cutting nodule removing device for a continuous casting cutting trolley. The subsequent rolling quality can be guaranteed, cutting slag can be rapidly cooled and granulated, and a large amount of smoke generated in the cutting process is reduced. Comprising a walking trolley body, and a cutting gun is arranged at the bottom of the walking trolley body; a slag blowing unit is arranged at the bottom of the walking trolley body and on one side of the cutting gun, and a water cooling unit is arranged at the bottom of the walking trolley body and on the other side of the cutting gun. The slag blowing unit comprises a steel billet supporting and guiding structure used for containing steel billets. An air injection device is fixed to the side, facing the steel billet, of the steel billet supporting and guiding structure. The water cooling unit comprises a connecting rod installed at the bottom of the walking trolley body, a slag baffle is arranged at the tail end of the connecting rod, a water inlet main pipe connected with a water source is installed on the side, opposite to a steel billet, of the slag baffle, and at least ten water outlets are formed in the bottom of the water inlet main pipe and used for forming waterfall water flow along the slag baffle.

Description

Technical Field

[0001] The utility model relates to steel billet cutting equipment in a continuous casting operation area of ​​a steelmaking plant, in particular to a cutting tumor removing device for a continuous casting cutting trolley. Background Art

[0002] The continuous casting cutting trolley is an important component of the continuous casting production line. It is used to cut the continuously cast ingot (usually slab or billet) into standard lengths of steel according to predetermined lengths during the continuous casting process.

[0003] When flame cutting is used to cut the continuous casting billet to length, the liquid steel may adhere to the lower edge of the cut of the continuous casting billet and form a cut nodule on the lower edge of the two cut sections. After cooling, these cut nodules will firmly adhere to the lower edge and lower surface of the end of the billet. When entering the subsequent steel rolling process, the cut nodules become harder because their cooling speed is much faster than that of the billet matrix. This will cause the cut nodules to damage the surface of the rolling groove when the rolling mill bites, or fall off and stick to the rolling groove. As the rollers rotate, the cut nodules may be pressed into the surface of the continuous casting billet again, and after multiple rolling and extension, long strip defects will eventually form on the surface of the finished steel product, causing the product to fail to meet quality standards.

[0004] In addition, even if the cut edge does not directly damage the rolling groove or adhere to it, it may be pressed into the head of the steel and form a scar. In order to remove this defective part, the length of the cut head must be increased, which will reduce the yield rate. Therefore, in order to ensure the production of high-quality products, the cut edge on the continuous casting billet must be thoroughly removed before rolling. Summary of the invention

[0005] The utility model aims to provide a device for removing cutting nodules of a continuous casting cutting trolley in view of the defects of the prior art. The purpose is to provide a device for removing cutting nodules of steel billets, which can ensure the quality of subsequent rolling, and is provided with a water cooling device to quickly cool and granulate the cutting slag, thereby reducing a large amount of smoke and dust generated during the cutting process, and at the same time can reduce labor intensity and improve the quality of steel billets.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme, including a walking trolley body, a cutting gun is arranged at the bottom of the walking trolley body; a slag blowing unit is arranged at the bottom of the walking trolley body and one side of the cutting gun, and a water cooling unit is arranged at the bottom of the walking trolley body and the other side of the cutting gun.

[0007] The slag blowing unit comprises a billet supporting and guiding structure for placing the billet; an air injection device is fixed on a side of the billet supporting and guiding structure facing the billet.

[0008] The water-cooling unit includes a connecting rod installed at the bottom of the walking trolley body. A slag baffle is provided at the end of the connecting rod. An inlet main pipe connected to a water source is installed on one side of the slag baffle facing the billet. At least 10 water outlet holes are provided at the bottom of the inlet main pipe to form a waterfall water flow along the slag baffle for cooling the liquid cutting tumor in contact with the slag baffle.

[0009] Further, the billet support and guiding structure includes two vertically arranged support and guiding columns and a floating plate slidably connected to the two support and guiding columns. The first ends of the support and guiding columns are connected to the bottom of the walking trolley body, and a circumferential end baffle is provided at the end of the support and guiding columns. A compression spring is sleeved outside each support and guiding column, and the compression spring is located between the floating plate and the end baffle for supporting the floating plate. The floating plate is connected to the jetting device. A pneumatic jack is arranged between the bottom of the walking trolley body and the two support and guiding columns for compressing the compression spring to make room for the billet to pass through smoothly.

[0010] Further, a top rod is arranged on the floating plate and below the pneumatic jack. The top rod is parallel to the support and guiding column, and the bottom end of the top rod is fixed to the floating plate. When the piston rod of the pneumatic jack extends, it applies force to the end of the top rod to press down the floating plate through the top rod.

[0011] Further, the floating plate is horizontally arranged, and a cushion block is provided on each side of the upper surface of the floating plate.

[0012] Further, the floating plate adopts a U-shaped structure, and the jetting device is installed inside the U-shaped structure. The jetting device includes a V-shaped jetting main pipe, and a row of jetting branch pipes arranged from short to long are provided on the jetting main pipe. An air inlet channel is opened on the floating plate for supplying air to the V-shaped jetting main pipe. The air inlet channel is communicated with the V-shaped jetting main pipe and is also communicated with a high-pressure air source.

[0013] Further, the number of jetting branch pipes on each jetting main pipe is at least 8.

[0014] Further, the outlets of the jetting branch pipes face the lower end of the cutting opening, and are used for blowing the formed liquid cutting tumor towards the slag baffle during the cutting process.

[0015] Further, the longitudinal section of the slag baffle is in a trapezoidal structure, with a wide bottom and a narrow top, so as to facilitate the downward flow of water along the inclined surface and enhance the cooling effect.

[0016] Further, the slag baffle is provided with air permeable holes, that is, the air permeable holes are densely distributed to facilitate the passage of the gas blown by the jetting branch pipes.

[0017] Further, the connecting rod is vertically arranged and parallel to the support and guiding column.

[0018] Compared with the prior art, the beneficial effects of the present utility model.

[0019] In the present utility model, a slag blowing unit is added to the original cutting trolley (i.e., the traveling trolley). This unit can perform high-pressure gas purging on the generated liquid metal tumors during the billet cutting process, thereby effectively removing these cutting tumors from the lower surface of the billet. At the same time, a water cooling unit is configured on the other side of the billet cutting position. This unit can cool the high-temperature cutting tumors that are blown off, which not only helps to reduce the soot pollution caused by hot slag, but also improves the safety and cleanliness of the working environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present utility model will be further described below in conjunction with the drawings and specific embodiments. The protection scope of the present utility model is not limited only to the description of the following content.

[0021] Figure 1 is the front view of a device for removing cutting tumors from a continuous casting cutting trolley.

[0022] Figure 2 is the side view of a device for removing cutting tumors from a continuous casting cutting trolley.

[0023] Figure 3 is a three-dimensional view of a device for removing cutting tumors from a continuous casting cutting trolley Figure 1 .

[0024] Figure 4 is a three-dimensional view of a device for removing cutting tumors from a continuous casting cutting trolley Figure 2 .

[0025] Figure 5 is a three-dimensional view of a device for removing cutting tumors from a continuous casting cutting trolley Figure 3 .

[0026] Figure 6 is a three-dimensional view of the slag blowing unit of a device for removing cutting tumors from a continuous casting cutting trolley.

[0027] Figure 7 is the front view of the slag blowing unit of a device for removing cutting tumors from a continuous casting cutting trolley.

[0028] In the figures, 1 is the traveling trolley body, 2 is the slag blowing unit, 3 is the water cooling unit, 4 is the cutting torch, 5 is the billet; 201 is the support and guiding column, 202 is the pneumatic jack cylinder, 203 is the push rod, 204 is the compression spring, 205 is the end stop, 206 is the floating plate, 207 is the spacer block, 208 is the main jet pipe, 209 is the jet branch pipe, 210 is the air intake channel; 301 is the connecting rod, 302 is the slag blocking plate, 303 is the air permeable hole, 304 is the main water inlet pipe, 305 is the water outlet. SPECIFIC EMBODIMENTS

[0029] To make the objectives, technical solutions, and beneficial effects of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model.

[0030] Embodiment 1: As Figures 1-7 shown, the structural description of the device for removing cutting tumors from the continuous casting cutting trolley:

[0031] At both ends corresponding to the cutting gun 4 on the lower end surface of the traveling trolley body 11 for cutting the steel billet 5, a slag blowing unit 2 is fixedly arranged at one end, and a water cooling unit 3 is fixedly arranged at the other end; the slag blowing unit 2, the water cooling unit 3, and the cutting gun 4 on the traveling trolley are arranged on the same straight line, and the slag blowing unit 2 and the water cooling unit 3 are respectively arranged on both sides of the cutting gun 4; during the cutting of the steel billet 5 by the cutting gun 4, the slag blowing unit 2 can blow air at the cutting tumor, blowing the cutting tumor towards the opposite slag baffle 302 to realize the water cooling process.

[0032] The slag blowing unit 2 is composed of two support and guiding columns 201 fixedly arranged on the lower end surface of one side of the traveling trolley and a floating plate 206 installed on the support and guiding columns 201. A guiding hole cooperating with the guiding column is arranged on the floating plate 206.

[0033] An end stop 205 is arranged on the lower end surface of the support and guiding column 201. A compression spring 204 is sleeved on the guiding column above the end stop 205. The compression spring 204 is arranged between the floating plate 206 and the end stop 205.

[0034] A push rod 203 is fixedly connected between the two support and guiding columns 201 on the upper end surface of the floating plate 206. A pneumatic jack 202 (installed downward) is installed on the lower end of the traveling trolley corresponding to the vertical direction of the push rod 203. When the rod of the pneumatic jack 202 extends, it can contact the upper surface of the push rod 203 and push the push rod 203 downward by a certain distance.

[0035] The floating plate 206 is of a U-shaped structure. Block 207 structures are fixedly arranged on the upper surfaces of the two ends of the U-shaped structure of the U-shaped structure, which is convenient for contacting the cut steel billet 5.

[0036] A V-shaped main jet pipe 208 is installed in the middle of the floating plate 206. Jet branch pipes 209 arranged in sequence from short to long are arranged on the main pipe (two groups are arranged in mirror image and the nozzles of the jet branch pipes 209 are inclined upward at a certain angle). An air inlet channel 210 is arranged in the middle of the floating plate 206 to facilitate supplying air to the V-shaped main jet pipe 208.

[0037] Before the billet is discharged from the crystallizer, the pneumatic push cylinder 202 moves the push rod 203 downward and compresses the compression spring 204, thereby making room for the billet to pass smoothly and avoid collision with the cushion block 207. When the billet is clamped and begins to be transported, the traveling carriage moves forward at the same speed as the billet; then the pneumatic push cylinder 202 is retracted, and the push rod 203 and the floating plate 206 are reset upward under the action of the compression spring 204, so that the cushion block 207 is close to the lower surface of the billet, maintaining a predetermined distance between the water spray branch pipe 209 and the bottom surface of the billet.

[0038] The water cooling unit 3 is composed of a connecting rod 301 fixedly arranged on the lower end surface of the other side of the traveling trolley and a slag blocking plate 302 fixedly connected to the lower end surface of the connecting rod 301 . The slag blocking plate 302 is provided with densely distributed circular air holes 303 .

[0039] The slag retaining plate 302 is arranged as a trapezoidal structure, which is narrow at the upper end and wide at the lower end; a transverse water inlet pipe 304 is arranged at the upper end of the slag retaining plate 302 and on the side corresponding to the steel billet 5 and is fixedly connected to the slag retaining plate 302, and a plurality of water outlets 305 are arranged below the water inlet pipe 304, and the water flowing out of the water outlets 305 can cover the corresponding surface of the slag retaining plate 302.

[0040] Working principle and working process description of the continuous casting cutting car cutting tumor removal device:

[0041] S1. Before the billet 5 is conveyed out of the crystallizer, the pneumatic push cylinder 202 is actuated, and the extension rod of the pneumatic push cylinder 202 extends out to support the upper end of the push rod 203, so that the push rod 203 moves downward a certain distance under the action of the push force. The push rod 203 moves downward under the action of the pneumatic push cylinder 202, and the push rod 203 drives the floating plate 206 to move downward along the support guide column 201. The floating plate 206 presses the compression spring 204 to facilitate the smooth passage of the billet 5 and avoid the collision of the billet 5 with the cushion block 207 mechanism during the output process.

[0042] S2. When the billet 5 is conveyed out from the crystallizer outlet, the billet 5 is clamped by a clamp on a cutting trolley (i.e., a traveling trolley) (not shown in the figure), and the traction force of the billet 5 conveyed drives the cutting trolley to move forward at the same speed as the billet 5.

[0043] S3. At this time, the pneumatic push rod 203 moves to retract the rod and detach it from the upper end surface of the push rod 203, so that the push rod 203 and the floating plate 206 move upward under the spring force of the compression spring 204 to restore the original shape, so that the cushion block 207 is close to the lower surface of the billet 5 (the purpose is to ensure the distance between the water spray pipe and the bottom surface of the billet 5).

[0044] S4. Start the cutting torch 4 carried on the traveling trolley. The cutting torch 4 starts to perform following cutting on the billet 5. During the cutting process, the molten steel forms a cutting tumor at the lower end of the cutting opening. At this time, high-pressure gas is ejected from the nozzle of the gas injection pipe. Since the outlet of the gas injection pipe is directly facing the lower end position of the cutting opening, under the blowing action of the high-pressure gas, the liquid cutting tumor is blown off from the lower end of the cutting opening and laterally flies towards the slag baffle 302 on the opposite side.

[0045] S5. The slag baffle 302 is provided with dense air holes to facilitate the passage of the high-pressure gas from the outlet of the gas injection pipe.

[0046] S6. An inlet main pipe 304 is arranged above the slag baffle 302, and a plurality of outlet ports 305 are arranged below the inlet main pipe 304. The water flowing out from the outlet ports 305 forms a waterfall flow on the inclined surface on the slag blocking side of the slag baffle 302 (the slag baffle 302 is set to be a trapezoidal structure in cross-section, with a wide bottom and a narrow top, which is convenient for the water to flow down to form a sloped waterfall).

[0047] S7. When the liquid cutting tumor is blown onto the slag baffle 302 and encounters the water flow, it will immediately cool down and then fall from the slag baffle 302 to the ground.

[0048] S8. After the cutting torch 4 completes the cutting, the pneumatic ejector rod 203 operates, repeating the first step, and then the cutting trolley returns to its original position for the next cutting cycle.

[0049] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that; it is still possible to modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; therefore, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope defined by the claims of the present invention.

Claims

1. A device for removing cutting tumors from a continuous casting cutting trolley, comprising a walking trolley body (1), and a cutting gun (4) is arranged at the bottom of the walking trolley body (1); characterized in that: At the bottom of the walking trolley body (1) and on one side of the cutting torch (4), there is a slag blowing unit (2), and on the other side of the bottom of the walking trolley body (1) and the cutting torch (4), there is a water cooling unit (3); The slag blowing unit (2) includes a billet support and guiding structure for placing the billet; on the side of the billet support and guiding structure facing the billet, there is a jetting device fixed; The water cooling unit (3) includes a connecting rod (301) installed at the bottom of the walking trolley body (1), at the end of the connecting rod (301), there is a slag baffle (302), on the side of the slag baffle (302) facing the billet, there is a main water inlet pipe (304) connected to the water source, at the bottom of the main water inlet pipe (304), there are at least 10 water outlet ports (305) for forming a waterfall flow along the slag baffle (302) to cool the liquid cutting nodules in contact with the slag baffle (302).

2. The device for removing cutting tumors of the continuous casting cutting trolley according to claim 1, wherein: The billet support and guiding structure includes two vertically arranged support and guiding columns (201), a floating plate (206) slidably connected to the two support and guiding columns (201); and the first ends of the support and guiding columns (201) are connected to the bottom of the walking trolley body (1), at the end of the support and guiding columns (201), there is a ring-shaped end baffle (205); a compression spring (204) is sleeved outside each support and guiding column (201), and the compression spring (204) is located between the floating plate (206) and the end baffle (205) for supporting the floating plate (206); the floating plate (206) is connected to the jetting device; between the bottom of the walking trolley body (1) and the two support and guiding columns (201), there is a pneumatic jack (202) for compressing the compression spring (204) so as to make room for the billet to pass through smoothly.

3. The device for removing cutting burrs of the continuous casting cutting trolley according to claim 2, wherein: On the floating plate (206) and below the pneumatic jack (202), there is a push rod (203), the push rod (203) is parallel to the support and guiding column (201), and the bottom end of the push rod (203) is fixed on the floating plate (206). When the piston rod of the pneumatic jack (202) extends, it applies force to the end of the push rod (203) to press down the floating plate (206) through the push rod (203).

4. The device for removing cutting tumors of the continuous casting cutting trolley according to claim 2, wherein: The floating plate (206) is horizontally arranged, and on both sides of the upper surface of the floating plate (206), there is a cushion block (207) respectively.

5. The device for removing cutting tumors of the continuous casting cutting trolley according to claim 2, characterized in that: The floating plate (206) adopts a U-shaped structure, and the jetting device is installed inside the U-shaped structure. The jetting device includes a V-shaped main jetting pipe (208), on the main jetting pipe (208), there is a row of jetting branch pipes (209) arranged from short to long. On the floating plate (206), there is an air inlet channel (210) for supplying air to the V-shaped main jetting pipe (208); the air inlet channel (210) is connected to the V-shaped main jetting pipe and is also connected to a high-pressure air source.

6. The device for removing cutting burrs of the continuous casting cutting trolley according to claim 5, characterized in that: The number of jetting branch pipes (209) on each main jetting pipe (208) is at least 8.

7. The device for removing cutting burrs of the continuous casting cutting trolley according to claim 5, characterized in that: The outlet of the jetting branch pipe (209) faces the lower end of the cutting opening; it is used to blow the formed liquid cutting nodules towards the slag baffle (302) during the cutting process.

8. The device for removing cutting tumors of the continuous casting cutting trolley according to claim 1, wherein: The longitudinal section of the slag baffle (302) is in a trapezoidal structure, with a wide bottom and a narrow top, so as to facilitate the water flow to flow downward along the inclined plane and enhance the cooling effect.

9. The device for removing cutting tumors of the continuous casting cutting trolley according to claim 8, characterized in that: The slag baffle plate (302) is provided with vent holes (303) to facilitate the passage of the gas blown by the jet branch pipe (209).

10. The device for removing cutting tumors of the continuous casting cutting trolley according to claim 2, characterized in that: The connecting rod (301) is vertically arranged and parallel to the support guide post (201).

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