Underground pipeline cutting equipment

Abstract

The utility model discloses underground pipeline cutting equipment which comprises a workbench, a first sliding groove is formed in the upper surface of the workbench, an inner supporting limiting assembly is installed in the first sliding groove in a sliding mode, and the inner supporting limiting assembly comprises two adjusting sliding blocks connected into the first sliding groove in a sliding mode. Two opposite inner side fixing mechanisms are fixedly installed on the two adjusting sliding blocks, each adjusting sliding block is further connected with a corresponding driving mechanism, a cutting assembly is fixedly installed on the portion, located on the upper surface of the workbench, of one side of a first sliding groove, and the inner side fixing mechanisms in an inner supporting limiting assembly can be adjusted according to the pipe diameters of different pipelines; the inner wall of the pipeline is circumferentially abutted from the interiors of the two ends of the pipeline to fix and limit the pipeline, stability of the pipeline in the cutting process is guaranteed, limitation in use is reduced, and meanwhile, due to the fact that the inner wall of the pipeline is abutted in the limiting process, an anti-corrosion and anti-rust coating on the outer wall of the pipeline can be prevented from being abraded due to friction in the cutting process of the pipeline.

Description

Technical Field

[0001] The utility model relates to the field of cutting devices, in particular to downhole pipeline cutting equipment. Background Art

[0002] As mining progresses, natural ventilation can no longer meet the needs of safe production, and forced ventilation devices are then used. In order to avoid dust storms caused by excessive dust concentration during mining and transportation, water supply and drainage devices are used underground in coal mines. At this point, coal mine pipes appear. In the production of underground pipes, it is necessary to cut the pipes and use cutting devices. Among the existing pipe cutting devices, for example, application number: CN201621464168.9 discloses a pipe cutting machine, including a frame and a clamping mechanism. The frame is provided with a clamping mechanism. The rotating sleeve is coaxial with the tightening mechanism, the rotating sleeve is rotatably connected with the frame, a knife inlet is opened on the outer wall of the rotating sleeve, a cutting mechanism extending into the knife inlet is fixed on the rotating sleeve, and two clamping mechanisms are symmetrically arranged with the rotating sleeve as the center, the clamping mechanism includes a linear slide rail fixed on the frame and extending along the length direction of the frame, a bracket frame slidingly arranged on the linear slide rail, a driving member driving the bracket frame to move along the linear slide rail, and a clamping sleeve arranged in the bracket frame for clamping the pipe; in this way, the distance between the two clamping mechanisms can be shortened to adapt to pipes with shorter lengths. Most of the above-mentioned solutions have the problem that the clamping diameter of the pipe cannot be adjusted, and the clamping is performed from the outside of the pipe, which will result in poor adaptability to pipes of different diameters during use, resulting in certain limitations in use. At the same time, when the pipe is clamped from the outside of the pipe, the clamping member is very likely to rub against the outer wall of the pipe during the cutting process, resulting in damage to the anti-corrosion and anti-rust layer coated on the outer wall of the pipe, thereby increasing the loss in underground pipe production.

[0003] How to invent a downhole pipe cutting device to improve these problems has become an urgent problem to be solved by technical personnel in this field. Utility Model Content

[0004] In order to make up for the above shortcomings, the utility model provides a downhole pipe cutting device, which aims to improve the problem that the clamping diameter of the pipe cannot be adjusted, and clamping from the outside of the pipe will result in poor adaptability to pipes of different diameters during use, resulting in certain limitations in use. At the same time, when clamping the pipe from the outside of the pipe, the clamping piece is very likely to rub against the outer wall of the pipe during the cutting process, causing damage to the anti-corrosion and anti-rust layer coated on the outer wall of the pipe, thereby raising the problem of loss in downhole pipe production.

[0005] 4. The repairing kit for automotive dents, according to claim 1, wherein a bottom of the foot stand comprises a through-hole, and the two foot pieces comprise two bosses, wherein the bosses comprise a through-hole, a screw bolt, and a nut. The bosses comprise a through-hole, a screw bolt, and a nut. The bosses comprise a through-hole, a screw bolt, and a nut.

[0006] In a preferred technical solution of the utility model, a plurality of installation grooves are evenly distributed in a ring shape on the outer wall of each displacement nut, one end of a corresponding connecting rod is rotatably connected between the inner walls on both sides of each installation groove, and the other end of each connecting rod is rotatably connected to one side of the bottom of the corresponding inner support block.

[0007] In a preferred technical solution of the present invention, the two ends of two limit rods are fixedly connected to the surface of one side of the L-shaped mounting plate on both sides of the bidirectional threaded rod, and limit grooves corresponding to the limit rods are arranged on both sides of the outer walls of the two displacement nuts, and the two displacement nuts are slidably connected to the limit rods on both sides through the limit grooves.

[0008] In a preferred technical solution of the present utility model, the other ends of the two limit rods are fixedly connected via a limit plate.

[0009] In a preferred technical solution of the present invention, each of the driving mechanisms includes a connecting plate fixedly mounted on the upper surface of the adjusting slider, a threaded hole is penetrated through the surface of one side of the connecting plate, a displacement screw is threadedly connected in the threaded hole, one end of the displacement screw is fixedly connected to one end of the output shaft of the second motor, and the other end of the displacement screw is rotatably connected to the surface of one side of the mounting plate, the second motor and the mounting plate in the same driving mechanism are located at both ends of the same side of the first slide groove and are fixedly connected to the upper surface of the workbench.

[0010] In a preferred technical solution of the utility model, the cutting assembly includes a lifting mechanism and a cutting blade and a driving device for driving the cutting blade to rotate, and the cutting blade is rotatably connected to the displacement part of the lifting mechanism.

[0011] In a preferred technical solution of the present invention, the lifting mechanism includes a mounting column, the mounting column is fixedly mounted on the upper surface of the workbench and located on one side of the first slide groove, a second slide groove is provided on one side surface of the mounting column, one end of a lifting screw is rotatably mounted on the inner wall at the bottom of the second slide groove, the other end of the lifting screw is fixedly connected to one end of an output shaft of a third motor through a through hole on the inner wall at the top of the second slide groove, the third motor is fixedly mounted on the top surface of the mounting column, a lifting slider is slidably mounted in the second slide groove, a threaded hole is penetrated through the upper surface of the lifting slider and is threadedly connected to the lifting screw through the threaded hole, one end of the lifting slider extends out of the second slide groove and is fixedly connected to the mounting bracket, the mounting bracket is N-shaped, and the cutting blade is rotatably mounted between the inner walls on both sides of the mounting bracket.

[0012] In a preferred technical solution of the present utility model, one end of a rotating shaft is fixedly connected to the central part of the two side surfaces of the cutting blade, and the other ends of the two rotating shafts are rotatably connected to the inner walls on both sides of the mounting frame. A fourth motor is fixedly installed on the surface of one side of the mounting frame, and one end of the output shaft of the fourth motor is fixedly connected to one end of the rotating shaft on the corresponding side through a through hole.

[0013] The beneficial effect of the utility model is that the utility model obtains a downhole pipe cutting device through the above-mentioned design. When in use, the two inner fixing mechanisms in the inner support limit assembly can be adjusted according to the pipe diameters of different pipes, and the inner wall of the pipe is circumferentially supported from the inside of the two ends of the pipe to complete the fixed limitation of the pipe, thereby ensuring the stability of the pipe during the cutting process, reducing the limitations in use, and increasing adaptability. At the same time, because the limitation is to support the inner wall of the pipe, the anti-corrosion and anti-rust coating of the outer wall of the pipe can also be prevented from being worn due to friction during the cutting process of the pipe, thereby reducing the loss during the production and processing of the downhole pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 This is a schematic three-dimensional diagram of the overall structure of the inner support limiter assembly provided in the embodiment of the utility model;

[0016] Figure 2 A schematic three-dimensional diagram of the overall structure of the inner support limiter assembly provided in the embodiment of the utility model;

[0017] Figure 3A schematic three-dimensional diagram of the overall structure of the inner fixing mechanism provided in an embodiment of the utility model;

[0018] Figure 4 A schematic three-dimensional diagram of the core structure of the inner fixing mechanism provided in the embodiment of the utility model;

[0019] Figure 5 A schematic three-dimensional diagram of the overall structure of the cutting assembly provided in an embodiment of the utility model.

[0020] In the figure: 100-workbench; 200-inner support limit assembly; 300-cutting assembly; 110-first slide; 210-adjusting slider; 220-inner fixing mechanism; 230-driving mechanism; 221-L-shaped mounting plate; 222-first motor; 223-bidirectional threaded rod; 224-displacement nut; 225-mounting slot; 226-connecting rod; 227-inner support block; 228-limiting slide; 229-limiting rod; 2210-limiting plate; 231-connecting plate; 232-displacement screw; 233-second motor; 234-mounting plate; 310-mounting column; 311-second slide; 312-lifting screw; 313-third motor; 314-lifting slider; 315-mounting frame; 320-cutting blade; 321-rotating shaft; 322-fourth motor. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the implementation of the utility model clearer, the technical solution in the implementation of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the utility model. Obviously, the described implementation is a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figures 1 to 5The utility model provides a technical solution: a downhole pipe cutting device, including a workbench 100, a first slide groove 110 is opened on the upper surface of the workbench 100, an inner support limit assembly 200 is slidably installed in the first slide groove 110, and the inner support limit assembly 200 includes two adjusting sliders 210 slidably connected to the first slide groove 110, and two relatively arranged inner side fixing mechanisms 220 are fixedly installed on the two adjusting sliders 210, each inner side fixing mechanism 220 includes an L-shaped mounting plate 221, and the L-shaped mounting plate 221 is fixedly installed on the upper surface of the adjusting slider 210, and a side surface of the L-shaped mounting plate 221 is fixed A first motor 222 is installed, and one end of the output shaft of the first motor 222 extends to the inner side of the L-shaped mounting plate 221 through a through hole and is fixedly connected to one end of a bidirectional threaded rod 223. Two displacement nuts 224 are threadedly connected to both ends of the bidirectional threaded rod 223 respectively. One end of a plurality of connecting rods 226 evenly distributed in a ring shape are hinged on the outer walls of the two displacement nuts 224. The other ends of the two corresponding connecting rods 226 on both sides are rotatably connected to an inner support block 227. Each adjusting slider 210 is also connected to the corresponding driving mechanism 230. A cutting assembly 300 is fixedly installed on one side of the first slide groove 110 on the upper surface of the workbench 100.

[0023] See also Figure 3 and Figure 4 A plurality of mounting grooves 225 are evenly distributed in a ring shape on the outer wall of each displacement nut 224 , one end of a corresponding connecting rod 226 is rotatably connected between the inner walls on both sides of each mounting groove 225 , and the other end of each connecting rod 226 is rotatably connected to one side of the bottom of the corresponding inner support block 227 .

[0024] When the first motor 222 is started to drive the bidirectional threaded rod 223 to rotate, because the threads at both ends of the outer wall of the bidirectional threaded rod 223 are in opposite directions and are respectively threadedly connected with corresponding displacement nuts 224, the two displacement nuts 224 will be displaced in opposite directions on the bidirectional threaded rod 223 as the bidirectional threaded rod 223 rotates, thereby adjusting the distance of all inner support blocks 227 relative to the bidirectional threaded rod 223 through the drive of the connecting rod 226. The top structure of the inner support block 227 is an arc shape, and several annularly distributed inner support blocks 227 can evenly support the inner wall of the pipe from the inside of the pipe. In actual use, an anti-slip rubber pad can be set on the top surface of the inner support block 227 to increase the friction between the inner support block 227 and the inner wall of the pipe, thereby making the fixation more firm and reducing the possibility of the pipe rotating. While improving the stability of the fixation during pipe cutting, it can also be adjusted according to the inner diameter of different pipes, thereby improving adaptability during use and reducing limitations.

[0025] Furthermore, one end of two limit rods 229 are fixedly connected to the surface of one side of the L-shaped mounting plate 221 on both sides of the bidirectional threaded rod 223, and limit grooves 228 corresponding to the limit rods 229 are arranged on both sides of the outer wall of the two displacement nuts 224. The two displacement nuts 224 are slidably connected to the limit rods 229 on both sides through the limit grooves 228.

[0026] The two displacement nuts 224 are threadedly connected to the bidirectional threaded rod 223 and are also slidably connected to the limit rods 229 on both sides. Therefore, when the bidirectional threaded rod 223 rotates, the displacement nuts 224 are restricted by the limit rods 229 on both sides and cannot rotate, thereby further improving the stability during use. By adjusting the rotation direction of the bidirectional threaded rod 223, the distance between the two displacement nuts 224 can be changed, thereby adjusting the diameter of the annular structure formed by the inner support block 227.

[0027] Furthermore, the other ends of the two limiting rods 229 are fixedly connected via a limiting plate 2210 .

[0028] By setting the limiting plate 2210 and cooperating with the surface of one side of the L-shaped mounting plate 221, the maximum distance of displacement of the two displacement nuts 224 to both ends can be limited to improve the stability during use.

[0029] See also Figure 2 Each driving mechanism 230 includes a connecting plate 231 fixedly mounted on the upper surface of the adjusting slider 210, a threaded hole is penetrated through the surface of one side of the connecting plate 231, a displacement screw 232 is threadedly connected in the threaded hole, one end of the displacement screw 232 is fixedly connected to one end of the output shaft of the second motor 233, and the other end of the displacement screw 232 is rotatably connected to the surface of one side of the mounting plate 234. The second motor 233 and the mounting plate 234 in the same driving mechanism 230 are located at two ends of the same side of the first slide groove 110 and are both fixedly connected to the upper surface of the workbench 100.

[0030] Because the adjusting slider 210 is threadedly connected to the corresponding displacement screw 232 through the connecting plate 231, when the second motor 233 is started to drive the displacement screw 232 to rotate, the corresponding adjusting slider 210 can slide and displace in the first slide groove 110, so that the distance between the adjusting sliders 210 on both sides can be adjusted, and the relative position of each adjusting slider 210 in the first slide groove 110 can also be adjusted, which is convenient for adjustment according to the length of the pipeline during use, and the position of the cutting pipeline can be adjusted so that the cutting point is located below the cutting assembly 300.

[0031] See also Figure 5 The cutting assembly 300 includes a lifting mechanism, a cutting blade 320, and a driving device for driving the cutting blade 320 to rotate. The cutting blade 320 is rotatably connected to the displacement part of the lifting mechanism.

[0032] The cutting blade 320 is driven to move up and down by the lifting mechanism, and is driven to rotate by the driving mechanism, thereby completing the cutting of the pipe.

[0033] Furthermore, the lifting mechanism includes a mounting column 310, which is fixedly mounted on the upper surface of the workbench 100 and located on one side of the first slide groove 110. A second slide groove 311 is provided on the surface of one side of the mounting column 310. One end of a lifting screw 312 is rotatably mounted on the inner wall at the bottom of the second slide groove 311. The other end of the lifting screw 312 is fixedly connected to one end of an output shaft of a third motor 313 through a through hole on the inner wall at the top of the second slide groove 311. The third motor 313 is fixedly mounted on the top surface of the mounting column 310. A lifting slider 314 is slidably mounted in the second slide groove 311. A threaded hole is provided on the upper surface of the lifting slider 314 and is threadedly connected to the lifting screw 312 through the threaded hole. One end of the lifting slider 314 extends out of the second slide groove 311 and is fixedly connected to a mounting frame 315. The mounting frame 315 is N-shaped, and the cutting blade 320 is rotatably mounted between the inner walls on both sides of the mounting frame 315.

[0034] Start the third motor 313 to drive the lifting screw 312 to rotate. Since the lifting slider 314 is slidably connected to the second slide groove 311 and is threadedly connected to the lifting screw 312, the lifting slider 314 will slide up and down in the second slide groove 311 as the lifting screw 312 rotates, thereby driving the mounting frame 315 to synchronously move and adjust the height of the cutting blade 320.

[0035] Furthermore, one end of a rotating shaft 321 is fixedly connected to the central part of the two side surfaces of the cutting blade 320, and the other ends of the two rotating shafts 321 are rotatably connected to the inner walls of the two sides of the mounting frame 315. A fourth motor 322 is fixedly installed on the surface of one side of the mounting frame 315, and one end of the output shaft of the fourth motor 322 is fixedly connected to one end of the rotating shaft 321 on the corresponding side through a through hole.

[0036] By starting the fourth motor 322, the cutting blade 320 is driven to rotate independently between the inner walls on both sides of the mounting frame 315, so as to cut the pipe.

[0037] Working principle: According to the length of the pipeline and the cutting position, the positions of the two adjusting slide blocks 210 in the first slide groove 110 are adjusted by the driving mechanism 230, and the two ends of the pipeline are respectively sleeved on the outside of the two-way threaded rods 223 on both sides, and the two first motors 222 are started to drive the corresponding two-way threaded rods 223 to rotate, so as to adjust the distance between the two displacement nuts 224 on the same two-way threaded rod 223, so as to adjust the distance between all the inner support blocks 227 relative to the two-way threaded rod 223 through the driving of the connecting rod 226. The top structure of the inner support block 227 is an arc shape, and a plurality of annularly distributed inner support blocks 227 can be adjusted from the circumferential direction of the inside of the pipeline. The inner wall of the pipe is supported with uniform force. In actual use, a non-slip rubber pad can be set on the top surface of the inner support block 227 to increase the friction between the inner support block 227 and the inner wall of the pipe, thereby making the fixation more secure and reducing the possibility of the pipe rotating. While improving the stability of the fixation during pipe cutting, it can also be adjusted according to the inner diameter of different pipes, thereby improving adaptability during use and reducing limitations. After the pipe is fixed, the cutting blade 320 is driven to rotate by the fourth motor 322, and the height of the cutting blade 320 is gradually reduced by the third motor 313 until the pipe is cut off, thereby completing the cutting work.

[0038] It should be noted that the specific models and specifications of the first motor 222, the second motor 233, the third motor 313 and the fourth motor 322 need to be selected and determined according to the actual specifications of the device, and the specific selection calculation method adopts the existing technology in this field, so it will not be described in detail.

[0039] The power supply and principle of the first motor 222 , the second motor 233 , the third motor 313 , and the fourth motor 322 are clear to those skilled in the art and are not described in detail herein.

[0040] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A downhole pipe cutting device, characterized in that: The cam is provided with an inner support limit assembly which is slidably mounted on the upper surface of the workbench and the inner support limit assembly comprises two adjusting blocks which are slidably connected to the first guide slot, and two relatively inner fixing mechanisms are fixedly mounted on the two adjusting blocks. Each of the inner fixing mechanisms comprises an L-shaped mounting plate, and the L-shaped mounting plate is fixedly mounted on the upper surface of the adjusting block. A first motor is fixedly mounted on a surface of one side of the L-shaped mounting plate, and one end of an output shaft of the first motor extends to the inner side of the L-shaped mounting plate through a through hole and is fixedly connected to one end of a bidirectional threaded rod. Two displacement nuts are respectively threadedly connected to two displacement nuts on the outer walls of the two displacement nuts, and one end of a plurality of connecting rods which are evenly distributed in an annular shape is hinged on the outer walls of the two connecting rods, and the other ends of the two connecting rods corresponding to the two sides are rotatably connected to an inner support block. Each of the adjusting blocks is also connected to the corresponding driving mechanism, and one side of the first guide slot is located on the upper surface of the workbench and a cutting assembly is fixedly mounted thereon.

2. The downhole pipe cutting device according to claim 1, characterized in that: A plurality of mounting grooves are evenly distributed in an annular shape on the outer wall of each displacement nut, one end of a corresponding connecting rod is rotatably connected between the inner walls on both sides of each mounting groove, and the other end of each connecting rod is rotatably connected to one side of the bottom of the corresponding inner support block.

3. The downhole pipe cutting device according to claim 1, characterized in that: The two sides of the bidirectional threaded rod are located on the surface of one side of the L-shaped mounting plate and are fixedly connected to one end of two limit rods. The outer walls of the two displacement nuts are provided with limit grooves corresponding to the limit rods on both sides, and the two displacement nuts are slidably connected to the limit rods on both sides through the limit grooves.

4. The downhole pipe cutting device according to claim 3, characterized in that: The other ends of the two limit rods are fixedly connected via a limit plate.

5. The downhole pipe cutting device according to claim 1, characterized in that: Each of the driving mechanisms includes a connecting plate fixedly mounted on the upper surface of the adjusting slider, a threaded hole is penetrated through the surface of one side of the connecting plate, a displacement screw is threadedly connected in the threaded hole, one end of the displacement screw is fixedly connected to one end of the output shaft of the second motor, and the other end of the displacement screw is rotatably connected to the surface of one side of the mounting plate. The second motor and the mounting plate in the same driving mechanism are located at two ends of the same side of the first slide groove and are fixedly connected to the upper surface of the workbench.

6. The downhole pipe cutting device according to claim 1, characterized in that: The cutting assembly comprises a lifting mechanism, a cutting blade and a driving device for driving the cutting blade to rotate, and the cutting blade is rotatably connected to the displacement part of the lifting mechanism.

7. The downhole pipe cutting device according to claim 6, characterized in that: The lifting mechanism includes a mounting column, wherein the mounting column is fixedly mounted on the upper surface of the workbench and is located on one side of the first slide groove, a second slide groove is provided on one side surface of the mounting column, one end of a lifting screw is rotatably mounted on an inner wall at the bottom of the second slide groove, the other end of the lifting screw is fixedly connected to one end of an output shaft of a third motor through a through hole on the inner wall at the top of the second slide groove, the third motor is fixedly mounted on the top surface of the mounting column, a lifting slider is slidably mounted in the second slide groove, a threaded hole is penetrated through the upper surface of the lifting slider and is threadedly connected to the lifting screw through the threaded hole, one end of the lifting slider extends out of the second slide groove and is fixedly connected to a mounting bracket, the mounting bracket is N-shaped, and the cutting blade is rotatably mounted between the inner walls on both sides of the mounting bracket.

8. The downhole pipe cutting device according to claim 7, characterized in that: One end of a rotating shaft is fixedly connected to the central part of the two side surfaces of the cutting blade, and the other ends of the two rotating shafts are rotatably connected to the inner walls of the two sides of the mounting frame. A fourth motor is fixedly installed on the surface of one side of the mounting frame, and one end of the output shaft of the fourth motor is fixedly connected to one end of the rotating shaft on the corresponding side through a through hole.

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