Continuous casting and continuous rolling apparatus for large-caliber thick-walled pipe

Abstract

Disclosed in the present invention is a continuous casting and continuous rolling apparatus for a large-caliber thick-walled pipe. The continuous casting and continuous rolling apparatus comprises a plurality of material guide frames, wherein supports are arranged on surfaces of the plurality of material guide frames, pressing parts are rotationally connected to two sides of each support, air cylinders are arranged on inner walls of the two sides of each support, output ends of the air cylinders are rotationally connected to surfaces of the pressing parts, a processing device is arranged on a surface of each material guide frame, the processing device comprises suction head frames, each suction head frame is formed by combining two L-shaped frames and a rectangular suction head, surfaces of the plurality of suction head frames are fixedly connected to connecting pipes, a water tank is fixedly connected to one side of each material guide frame, and a surface of the water tank is fixedly connected to an exhaust fan. By means of providing a purification device, a waste gas generated by materials can be purified, the waste gas generated during transportation of the materials in the apparatus can be effectively reduced, and a situation in which the health of workers is compromised by the inhaling of the waste gas during apparatus survey is mitigated, thereby improving the overall practicability of the apparatus.

Description

A large-diameter thick-walled pipe continuous casting and rolling equipment Technical Field

[0001] The invention relates to the technical field of large-diameter thick-walled pipe processing, in particular to large-diameter thick-walled pipe continuous casting and rolling equipment. Background Art

[0002] During the production of large-diameter, thick-walled pipes, continuous casting and rolling are performed. This process, also known as continuous casting and rolling, involves pouring liquid steel into a continuous casting machine to cast a billet. The billet is then held in a soaking furnace for a specified period of time without cooling, and then directly rolled into a hot rolling mill. This process cleverly combines casting and rolling. Compared to the traditional process of casting the billet, heating it in a heating furnace, and then rolling, it offers advantages such as simplified production, improved labor conditions, increased metal yield, energy conservation, improved billet quality, and ease of mechanization and automation.

[0003] However, the existing processing equipment has the following deficiencies:

[0004] When the existing equipment is used, such as CN105848795B, the rolling equipment of one embodiment of the present invention may include: a billet supply part for producing billets; a rolling mill connected to the billet supply part for receiving billets for rolling; and a heating unit arranged between the billet supply part and the rolling mill, and the central part of the billet in the thickness direction is reheated while the latent heat is maintained by preheating. In addition, the continuous casting and rolling equipment of another embodiment of the present invention may include: a continuous casting machine for producing billets; a rolling mill connected to the rolling mill for receiving the billets; and a heating unit arranged at the front end of the rolling mill for repeatedly heating the billets at multiple positions to achieve uniform heating. In addition, the continuous casting and rolling method of another embodiment of the present invention may include: a continuous casting step for producing billets; a uniform heating step for repeatedly heating the billets at multiple positions in the transfer direction of the billets; and a rolling step for pressing down the billets after the uniform heating step, which solves the problem of poor quality of raw materials produced by traditional equipment.

[0005] The inventors discovered in their daily work that during continuous casting and rolling, the raw materials would be transported to the continuous casting and straightening machine for adjustment. However, a large amount of waste gas would be generated when the materials were discharged. There were also a large number of impurities in the waste gas that could easily pollute the factory environment. This caused people to inhale the waste gas to maintain their health when surveying the equipment, which in turn made it inconvenient to purify the waste gas when the equipment was in use.

[0006] Therefore, we proposed a large-diameter thick-walled pipe continuous casting and rolling equipment to solve the above problems. Summary of the Invention

[0007] The purpose of the present invention is to provide a large-diameter thick-walled pipe continuous casting and rolling equipment. The exhaust fan cooperates with the suction pipe and the connecting pipe to enable the suction head frame to suck the exhaust gas from the feed point, and discharge the exhaust gas into the water tank through the intake pipe. The water in the water tank filters the impurities in the exhaust gas, and the filtered gas enters the purifier from the exhaust port for purification treatment, so as to solve the problems raised by the above-mentioned background technology.

[0008] To achieve the above-mentioned object, the present invention provides the following technical solution: A large-diameter thick-walled pipe continuous casting and rolling equipment includes a guide rack, wherein the guide rack is provided with a plurality of brackets on the surfaces of the plurality of guide racks, and pressure pieces are rotatably connected on both sides of the brackets. Cylinders are provided on the inner walls of both sides of the brackets, and the output ends of the cylinders are rotatably connected to the surfaces of the pressure pieces. A processing device is provided on the surface of the guide rack, and the processing device includes a suction head rack, which is composed of two L-shaped racks and rectangular suction heads. The surfaces of the plurality of suction head racks are fixedly connected to connecting pipes, one side of the guide rack is fixedly connected to a water tank, and the surface of the water tank is fixedly connected to an exhaust fan, the input end of the exhaust fan is fixedly connected to an intake pipe, one end of the intake pipe is fixedly connected to the surface of the connecting pipe, the output end of the exhaust fan is fixedly connected to an intake pipe, and one end of the intake pipe extends into the water tank. The exhaust fan cooperates with the connecting pipe and the suction head to extract the waste gas generated when the material discharge is adjusted into the water tank, and filter the impurities in the waste gas.

[0009] Preferably, a purifier is fixedly connected to one side of the water tank, the input end of the purifier is fixedly connected to an exhaust pipe, one end of the exhaust pipe is fixedly connected to the surface of the water tank. By setting up the exhaust pipe, the gas from which impurities are filtered out of the water tank can be transported to the purifier for purification.

[0010] Preferably, a pump body is fixedly connected to one side surface of the water tank, the input end of the pump body is fixedly connected to the water tank through conduit 1, a treatment box is fixedly connected to one side surface of the water tank, the output end of the pump body is fixedly connected to the surface of the treatment box through conduit 2, a sealing cover is provided on the surface of the treatment box, and an intercepting net is provided on the lower surface of the sealing cover. The sewage filtered in the water tank is transported to the treatment box through the pump body, and the intercepting net can intercept and filter impurities.

[0011] Preferably, one end of the treatment box is fixedly connected to a circulation pipe, and one end of the circulation pipe is fixedly connected to the surface of the water tank. By setting the circulation pipe, the filtered water can be discharged into the water tank.

[0012] Preferably, an auxiliary device is provided on one side of the processing box close to the sealing cover, and the auxiliary device includes a positioning block. There are two positioning blocks, and the two positioning blocks are fixedly connected to the surface of the processing box. Two positioning holes are provided on the surface of the sealing cover, and the positioning blocks are plugged into the inner walls of the positioning holes. A threaded hole is provided on one side surface of the sealing block, and a screw is threadedly connected to the inner wall of the threaded hole. A socket is provided on the surface of the positioning block, and the socket is for the screw to pass through. A knob is fixedly connected to one end of the screw. By providing the screw, the sealing cover is conveniently placed, and it is convenient to quickly open and clean the interception net when cleaning it later.

[0013] Preferably, one side surface of the knob is rotatably connected to a connector, one end of the connector is fixedly connected to a pull rope, one end of the pull rope is fixedly connected to the surface of the sealing cover, and the pull rope cooperates with the connector to limit and protect the knob and the screw to prevent the screw from falling.

[0014] Preferably, a handle is fixedly connected to the upper surface of the sealing cover, and the handle makes it easy to take out the sealing cover and the intercepting net together and clean the intercepting net.

[0015] Preferably, a limiting device is provided on the surface of the material guide rack, and the limiting device includes a fixing rack, which is fixedly connected to the surface of the material guide rack, a rectangular hole is provided on the surface of the fixing rack, and a stopper 1 and a stopper 2 are slidably connected to the inner wall of the rectangular hole, a connecting hole is provided on the surface of the fixing rack, and a rotating rod is rotatably connected to the inner wall of the connecting hole, and a thread groove 1 and a thread groove 2 are provided on the surface of the rotating rod, and a hole 1 and a hole 2 are provided on the surfaces of the stopper 1 and the stopper 2, and the hole 1 and the hole 2 are threadedly connected to the thread groove 1 and the thread groove 2 respectively, and the stopper 1 and the stopper 2 can be adjusted by rotating the rotating rod, so as to facilitate the limiting and blocking of materials of different calibers.

[0016] Preferably, the stopper 1 and the stopper 2 are composed of a square block and a rectangular plate, and the cross-section of the rectangular plate is angled. The larger cross-section of the rectangular plate on the surface of the stopper 1 and the stopper 2 can improve the limiting stability.

[0017] Preferably, one end of the rotating rod is fixedly connected to a handle. By providing the handle, it is easy to control the rotation of the rotating rod, thereby improving ease of use during adjustment.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. When the equipment of the present invention is performing continuous casting and rolling, when the material is discharged, it will fall on the guide angle, and the cylinder drives the pressure piece to make the material distorted. By setting up a processing device, when the equipment needs to be used, the exhaust fan is turned on, and the exhaust fan cooperates with the suction pipe and the connecting pipe to enable the suction head frame to suck the exhaust gas from the feed, and discharge the exhaust gas into the water tank through the intake pipe. The water in the water tank filters the impurities in the exhaust gas, and the filtered gas enters the purifier from the exhaust port for purification treatment. When the water in the water tank needs to be treated, the pump body is opened, and the pump body cooperates with the first and second conduits to draw water into the treatment box. The interception net intercepts and filters the impurities in the water, and the filtered water enters the water tank through the circulation pipe to complete the evolution treatment. By setting up a purification device, it is convenient to purify the exhaust gas generated by the material, which can effectively reduce the exhaust gas generated during the transportation of the material in the equipment, and the phenomenon that a large amount of impurities in the exhaust gas easily pollute the factory environment, reduces the situation of manual inhalation of exhaust gas to maintain health when surveying the equipment, and thus improves the overall practicality of the equipment.

[0020] 2. The present invention provides an auxiliary device. When the intercepting net needs to be cleaned, the knob and the screw are turned to pull the screw out of the positioning block. The pull rope is used to protect and limit the screw. The positioning hole on the surface of the sealing cover is pulled out from the positioning block through the handle. The sealing cover brings out the intercepting net and can be cleaned. By providing the auxiliary device, the use of auxiliary equipment is facilitated, which can effectively reduce the situation where impurities in the exhaust gas are difficult to be centrally treated when the equipment is treating the exhaust gas, causing inconvenience in cleaning and affecting subsequent purification, thereby improving the overall usability of the equipment.

[0021] 3. The present invention sets a limit device. When the equipment needs to be used, the handle is rotated, and the handle drives the rotating rod to rotate. The thread groove one and the thread groove two enable the blocker one and the blocker two to move in the rectangular hole on the surface of the fixed frame, thereby adjusting the position of the blocker one and the blocker two to complete the use. By setting the limit device, it is convenient to limit materials of different sizes and diameters, and it can effectively reduce the inconvenience of limiting different materials when the equipment is in use, which makes it easy for the material to collide during movement and become stuck and unable to move. The damage caused by swinging and collision is reduced, thereby improving the overall stability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] FIG1 is a perspective view of the main structure of a large-diameter thick-walled pipe continuous casting and rolling equipment according to the present invention;

[0023] FIG2 is a side perspective view of a large-diameter thick-walled pipe continuous casting and rolling equipment according to the present invention;

[0024] FIG3 is an enlarged perspective view of the structure at point A in FIG2 of a large-diameter thick-walled pipe continuous casting and rolling equipment according to the present invention;

[0025] FIG4 is a perspective view of a portion of the structure of a processing device in a large-diameter thick-walled pipe continuous casting and rolling equipment according to the present invention;

[0026] FIG5 is a perspective view of the auxiliary device structure of a large-diameter thick-walled pipe continuous casting and rolling equipment according to the present invention;

[0027] FIG6 is an enlarged perspective view of the structure at point B in FIG5 in a large-diameter thick-walled pipe continuous casting and rolling equipment according to the present invention;

[0028] FIG7 is a perspective view of the structure of the auxiliary device in a large-diameter thick-walled pipe continuous casting and rolling equipment according to the present invention;

[0029] FIG8 is a perspective view of the structure of a limiting device in a large-diameter thick-walled pipe continuous casting and rolling equipment according to the present invention.

[0030] In the figure: 1. Material guide rack; 2. Bracket; 3. Cylinder; 4. Pressing piece; 5. Processing device; 51. Suction head rack; 52. Connecting pipe; 53. Exhaust fan; 54. Water tank; 55. Purifier; 56. Inlet pipe; 57. Suction pipe; 58. Exhaust pipe; 59. Processing box; 510. Sealing cover; 511. Pump body; 512. Circulation pipe; 513. Intercepting net; 6. Auxiliary device; 61. Positioning block; 62. Handle; 63. Knob; 64. Screw; 65. Pull rope; 66. Connecting piece; 7. Limiting device; 71. Fixing frame; 72. Rotating rod; 73. Stopper 1; 74. Thread groove 1; 75. Thread groove 2; 76. Handle; 77. Stopper 2. Implementation Method

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0032] Please refer to Figures 1-8. The present invention provides a technical solution: a large-diameter thick-walled pipe continuous casting and rolling equipment, including a guide rack 1, a plurality of guide racks 1, a plurality of guide racks 1 having a bracket 2 on the surface thereof, both sides of the bracket 2 being rotatably connected to a pressing piece 4, a cylinder 3 being provided on the inner wall of both sides of the bracket 2, an output end of the cylinder 3 being rotatably connected to the surface of the pressing piece 4, a processing device 5 being provided on the surface of the guide rack 1, the processing device 5 including a suction head rack 51, the suction head rack 51 being composed of two L-shaped racks and a rectangular suction head, and the surfaces of the plurality of suction head racks 51 A connecting pipe 52 is fixedly connected, a water tank 54 is fixedly connected to one side of the guide rack 1, an exhaust fan 53 is fixedly connected to the surface of the water tank 54, the input end of the exhaust fan 53 is fixedly connected to an air suction pipe 57, one end of the air suction pipe 57 is fixedly connected to the surface of the connecting pipe 52, the output end of the exhaust fan 53 is fixedly connected to an air intake pipe 56, one end of the air intake pipe 56 extends into the water tank 54, and the exhaust fan 53 cooperates with the connecting pipe 52 and the suction head to extract the waste gas generated during the material discharging adjustment into the water tank 54, and filter the impurities in the waste gas.

[0033] As shown in Figure 4: Specifically, a purifier 55 is fixedly connected to one side of the water tank 54, and the input end of the purifier 55 is fixedly connected to the exhaust pipe 58. One end of the exhaust pipe 58 is fixedly connected to the surface of the water tank 54. By setting the exhaust pipe 58, the gas from which impurities are filtered out of the water tank 54 can be transported to the purifier 55 for purification.

[0034] As shown in Figure 4: Specifically, a pump body 511 is fixedly connected to the surface of one side of the water tank 54, and the input end of the pump body 511 is fixedly connected to the water tank 54 through a conduit 1. A treatment box 59 is fixedly connected to the surface of the water tank 54, and the output end of the pump body 511 is fixedly connected to the surface of the treatment box 59 through a conduit 2. A sealing cover 510 is provided on the surface of the treatment box 59, and an intercepting net 513 is provided on the lower surface of the sealing cover 510. The sewage filtered in the water tank 54 is transported to the treatment box 59 through the pump body 511, and the intercepting net 513 can intercept and filter impurities.

[0035] As shown in Figure 4: Specifically, one end of the treatment box 59 is fixedly connected to the circulation pipe 512, and one end of the circulation pipe 512 is fixedly connected to the surface of the water tank 54. By setting the circulation pipe 512, the filtered water can be discharged into the water tank 54.

[0036] As shown in Figure 5-6-7: Specifically, an auxiliary device 6 is provided on one side of the processing box 59 close to the sealing cover 510, and the auxiliary device 6 includes a positioning block 61. There are two positioning blocks 61, and the two positioning blocks 61 are fixedly connected to the surface of the processing box 59. Two positioning holes are provided on the surface of the sealing cover 510, and the positioning blocks 61 are plugged into the inner walls of the positioning holes. A threaded hole is provided on one side surface of the sealing block, and a screw 64 is threadedly connected to the inner wall of the threaded hole. A socket is provided on the surface of the positioning block 61 for the screw 64 to pass through, and a knob 63 is fixedly connected to one end of the screw 64. By providing the screw 64, it is convenient to place the sealing cover 510, and it is convenient to quickly open and clean the intercepting net 513 later.

[0037] As shown in Figure 6: Specifically, one side surface of the knob 63 is rotatably connected to a connector 66, one end of the connector 66 is fixedly connected to a pull rope 65, and one end of the pull rope 65 is fixedly connected to the surface of the sealing cover 510. By coordinating the pull rope 65 with the connector 66, the knob 63 and the screw 64 can be restricted and protected to prevent the screw 64 from falling.

[0038] As shown in FIG. 5 , specifically, a handle 62 is fixedly connected to the upper surface of the sealing cover 510 , and the sealing cover 510 and the intercepting net 513 can be taken out together through the handle 62 to clean the intercepting net 513 .

[0039] As shown in Figure 8: Specifically, a limiting device 7 is provided on the surface of the material guide frame 1, and the limiting device 7 includes a fixing frame 71, which is fixedly connected to the surface of the material guide frame 1, and a rectangular hole is provided on the surface of the fixing frame 71, and a stopper 73 and a stopper 2 77 are slidably connected to the inner wall of the rectangular hole, and a connecting hole is provided on the surface of the fixing frame 71, and a rotating rod 72 is rotatably connected to the inner wall of the connecting hole, and a thread groove 1 74 and a thread groove 2 75 are provided on the surface of the rotating rod 72, and a hole 1 and a hole 2 are provided on the surfaces of the stopper 73 and the stopper 2 77, which are threadedly connected to the thread groove 1 74 and the thread groove 2 75 respectively, and the stopper 1 73 and the stopper 2 77 can be adjusted by rotating the rotating rod 72, so as to facilitate the limiting and blocking of materials of different calibers.

[0040] As shown in Figure 8: Specifically, stopper 1 73 and stopper 2 77 are composed of a square block and a rectangular plate. The cross-section of the rectangular plate is angled. The larger cross-section of the rectangular plate on the surface of stopper 1 73 and stopper 2 77 can improve the limiting stability.

[0041] As shown in FIG8 , specifically, one end of the rotating rod 72 is fixedly connected to a handle 76 . By providing the handle 76 , it is easy to control the rotation of the rotating rod 72 , thereby improving ease of use during adjustment.

[0042] The effect achieved by the entire mechanism is as follows: when the equipment is performing continuous casting and rolling, when the material is discharged, it will fall on the guide angle, and the cylinder 3 drives the pressure piece 4 to prevent the material from becoming crooked. By setting up the processing device 5, when the equipment needs to be used, the exhaust fan 53 is turned on, and the exhaust fan 53 cooperates with the suction pipe 57 and the connecting pipe 52 to make the suction head frame 51 suck the exhaust gas from the feed, and discharge the exhaust gas into the water tank 54 through the intake pipe 56. The water in the water tank 54 filters the impurities in the exhaust gas, and the filtered gas enters the purifier 55 from the exhaust port for purification. When the water in the water tank 54 needs to be processed When the pump body 511 is turned on, the pump body 511 cooperates with the conduit 1 and the conduit 2 to pump water into the treatment box 59, and the interception net 513 intercepts and filters the impurities in the water. The filtered water enters the water tank 54 through the circulation pipe 512, and the evolution treatment is completed. By setting up a purification device, it is convenient to purify the waste gas generated by the material, which can effectively reduce the waste gas generated by the material in the equipment during the transportation process. There are also a lot of impurities in the waste gas that are easy to pollute the factory environment. The phenomenon reduces the situation of manual inhalation of waste gas to maintain health when surveying the equipment, thereby improving the overall practicality of the equipment.

[0043] By setting up the auxiliary device 6, when the interception net 513 needs to be cleaned, the knob 63 and the screw 64 are turned to pull the screw 64 out of the positioning block 61, and the pull rope 65 is used to protect and limit the screw 64. The positioning hole on the surface of the sealing cover 510 is pulled out from the positioning block 61 through the handle 62, and the sealing cover 510 is taken out of the interception net 513 for cleaning. By setting up the auxiliary device 6, the use of auxiliary equipment is facilitated, which can effectively reduce the situation where impurities in the exhaust gas are difficult to be centrally treated when the equipment is treating the exhaust gas, causing inconvenience in cleaning and affecting subsequent purification, thereby improving the overall usability of the equipment.

[0044] By setting the limit device 7, when the equipment needs to be used, the handle 76 is rotated, and the handle 76 drives the rotating rod 72 to rotate, and the thread groove 1 74 and the thread groove 2 75 make the block 1 73 and the block 2 77 move in the rectangular hole on the surface of the fixed frame 71, so as to adjust the position of the block 1 73 and the block 2 77 to complete the use. By setting the limit device 7, it is convenient to limit materials of different sizes and diameters, and it can effectively reduce the inconvenience of limiting different materials when the equipment is in use, which makes it easy for the material to collide during movement and become stuck and unable to move, reduces the damage caused by swinging and collision, and thus improves the overall stability of the equipment.

[0045] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A large-diameter thick-walled pipe continuous casting and rolling equipment, characterized by: The invention comprises a material guide rack (1), wherein the number of the material guide racks (1) is plural, and the surfaces of the plurality of material guide racks (1) are provided with brackets (2), both sides of the brackets (2) are rotatably connected with pressure pieces (4), both sides of the inner walls of the brackets (2) are provided with cylinders (3), the output ends of the cylinders (3) are rotatably connected with the surfaces of the pressure pieces (4), and the surfaces of the material guide racks (1) are provided with processing devices (5), and the processing devices (5) comprise suction head racks (51), and the suction head racks (51) are combined by two L-shaped racks and rectangular suction heads. The surfaces of the plurality of suction head racks (51) are fixedly connected to connecting pipes (52), one side of the material guide rack (1) is fixedly connected to a water tank (54), the surface of the water tank (54) is fixedly connected to an exhaust fan (53), the input end of the exhaust fan (53) is fixedly connected to an air intake pipe (57), one end of the air intake pipe (57) is fixedly connected to the surface of the connecting pipe (52), the output end of the exhaust fan (53) is fixedly connected to an air intake pipe (56), and one end of the air intake pipe (56) extends into the water tank (54).

2. The large-diameter thick-walled pipe continuous casting and rolling equipment according to claim 1, characterized in that: A purifier (55) is fixedly connected to one side of the water tank (54); an input end of the purifier (55) is fixedly connected to an exhaust pipe (58); and one end of the exhaust pipe (58) is fixedly connected to the surface of the water tank (54).

3. The large-diameter thick-walled pipe continuous casting and rolling equipment according to claim 2, characterized in that: A pump body (511) is fixedly connected to the surface of one side of the water tank (54); an input end of the pump body (511) is fixedly connected to the water tank (54) via a first conduit; a treatment box (59) is fixedly connected to the surface of one side of the water tank (54); an output end of the pump body (511) is fixedly connected to the surface of the treatment box (59) via a second conduit; a sealing cover (510) is provided on the surface of the treatment box (59); and an interception net (513) is provided on the lower surface of the sealing cover (510).

4. The large-diameter thick-walled pipe continuous casting and rolling equipment according to claim 3, characterized in that: One end of the treatment box (59) is fixedly connected to a circulation pipe (512), and one end of the circulation pipe (512) is fixedly connected to the surface of the water tank (54).

5. The large-diameter thick-walled pipe continuous casting and rolling equipment according to claim 3, characterized in that: An auxiliary device (6) is provided on one side of the processing box (59) close to the sealing cover (510), and the auxiliary device (6) comprises a positioning block (61). There are two positioning blocks (61), and the two positioning blocks (61) are fixedly connected to the surface of the processing box (59). Two positioning holes are provided on the surface of the sealing cover (510), and the positioning blocks (61) are plugged into the inner walls of the positioning holes. A threaded hole is provided on one side of the surface of the sealing block, and a screw rod (64) is threadedly connected to the inner wall of the threaded hole. A plug hole is provided on the surface of the positioning block (61), and the plug hole is for the screw rod (64) to pass through. One end of the screw rod (64) is fixedly connected to a knob (63).

6. The large-diameter thick-walled pipe continuous casting and rolling equipment according to claim 5, characterized in that: A connecting piece (66) is rotatably connected to a surface of one side of the knob (63); one end of the connecting piece (66) is fixedly connected to a pull rope (65); and one end of the pull rope (65) is fixedly connected to a surface of the sealing cover (510).

7. The large-diameter thick-walled pipe continuous casting and rolling equipment according to claim 3, characterized in that: A handle (62) is fixedly connected to the upper surface of the sealing cover (510).

8. The large-diameter thick-walled pipe continuous casting and rolling equipment according to claim 1, characterized in that: A limiting device (7) is provided on the surface of the material guide frame (1), the limiting device (7) comprising a fixing frame (71), the fixing frame (71) being fixedly connected to the surface of the material guide frame (1), a rectangular hole being provided on the surface of the fixing frame (71), a first stopper (73) and a second stopper (77) being slidably connected to the inner wall of the rectangular hole, a connecting hole being provided on the surface of the fixing frame (71), a rotating rod (72) being rotatably connected to the inner wall of the connecting hole, a first thread groove (74) and a second thread groove (75) being provided on the surface of the rotating rod (72), a first hole and a second hole being provided on the surfaces of the first stopper (73) and the second stopper (77), the first hole and the second hole being respectively threadedly connected to the first thread groove (74) and the second thread groove (75).

9. The large-diameter thick-walled pipe continuous casting and rolling equipment according to claim 8, characterized in that: The first stopper (73) and the second stopper (77) are formed by combining a square block and a rectangular plate, and the cross-section of the rectangular plate is angled.

10. The large-diameter thick-walled pipe continuous casting and rolling equipment according to claim 9, characterized in that: One end of the rotating rod (72) is fixedly connected to a handle (76).

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