Pipeline welding equipment

Abstract

The invention relates to the technical field of pipeline welding, in particular to pipeline welding equipment which comprises a workbench, a welding machine, a clamping mechanism for clamping and conveying a pipe fitting and a machining mechanism for machining the clamped pipe fitting before welding. According to the pipeline welding equipment, the sleeving rod is driven to rotate only through the forward and reverse rotation motor, the interior of a pipe fitting is clamped by arranging the fixing assembly, and the pipeline welding equipment adapts to pipe fittings with different pipe diameters; the cutting knife is moved to the pipeline welding position while the interior of the pipe fitting is supported, groove cutting can be conducted on the pipeline before welding, grinding and cutting can be conducted on grooves, with different depths, of the pipe fitting, and the cut grooves are made to have the optimal welding inclination all the time. The welding effect is better; and meanwhile, when the threaded disc 441 moves, the grinding piece gets close to the pipe fitting along a guide groove in the threaded disc, the outer wall of the pipe fitting is ground while the groove of the pipeline is ground, and the welding effect is further improved.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline welding, and in particular to a pipeline welding device. Background Art

[0002] In the modern industrial field, pipeline systems play a vital role, especially in the energy, chemical, oil and gas industries. Efficient and stable pipeline systems are the key to ensuring smooth and safe operation of the process. Pipeline welding is a key link in the construction of pipeline systems, and its quality and efficiency directly affect the performance and life of the entire system.

[0003] At present, when welding pipes at the construction site, due to changes in weather, humidity and moisture, the pipes piled up at the construction site may rust or be attached with foreign matter before welding. Therefore, manual grinding equipment is required for individual grinding before welding, which affects welding efficiency and increases labor.

[0004] At the same time, when welding pipes at the construction site, the length of the pipes used varies due to different usage scenarios. Existing pipe manufacturers usually produce pipes in specified lengths, so workers mostly cut them according to the specific length of use. However, when welding the cut end faces after cutting, the edges of the pipes may have defects such as unevenness, oxidation, and slag inclusions, which will affect the welding quality.

[0005] Patent application number CN202110148565.4 discloses a pipe beveling machine, which belongs to the field of pipe welding technology. The pipe beveling machine includes: a main shaft, and a first drive assembly, a tensioning assembly, a cutting assembly and a second drive assembly sleeved on the main shaft. When the first drive assembly and the tensioning assembly are located in the pipe to be cut, the first drive assembly can drive the multiple tensioning blocks in the tensioning assembly to move in the direction of the inner wall of the pipe to be cut. Under the action of the synchronization ring, the multiple tensioning blocks can move in the direction of the inner wall of the pipe to be cut at the same time. Therefore, the multiple tensioning blocks will abut on the inner wall of the pipe at the same time, so that after the tensioning assembly is fixed on the inner wall of the pipe to be cut, the axis center line of the main shaft sleeved by the tensioning assembly and the axis center line of the pipe to be cut have a high degree of coincidence. In this way, after the end face of one end of the pipe to be cut is cut by the cutting assembly, the quality of the groove formed is high.

[0006] The above patent mentions a pipe bevel cutting device; by opening the bevel, it can not only increase the depth and width of the weld, thereby ensuring the strength and durability of the welded joint, but also effectively reduce the thermal stress generated during the welding process, and reduce the risk of joint deformation and cracking; however, the patent cannot adapt to different pipe diameters to give the best grinding bevel angle, and grind the outer surface of the pipe while cutting the bevel.

[0007] Therefore, it is necessary to provide a new technical solution to overcome the above-mentioned defects. Summary of the invention

[0008] The object of the present invention is to provide a pipeline welding device which can effectively solve the above technical problems.

[0009] In order to achieve the purpose of the present invention, the following technical scheme is adopted:

[0010] A pipeline welding device comprises: a workbench, a welding machine, a clamping mechanism for clamping and transmitting pipe fittings, and a processing mechanism for performing pre-welding processing on the clamped pipe fittings;

[0011] The processing mechanism is composed of a forward and reverse motor, a sleeve rod coaxially connected to the forward and reverse motor, a fixing assembly, a cutting assembly for cutting a groove on the inner wall of the pipe, and a grinding assembly for grinding the pipe;

[0012] The sleeve rod is divided into a threaded area and a sleeve area; and the threaded area of ​​the sleeve rod is also provided with a sliding groove;

[0013] The fixing assembly comprises: a support member; the support member is hinged to the sleeve area of ​​the sleeve rod through a hinge rod; a sliding member; the sliding member is slidably mounted on the sleeve area of ​​the sleeve rod; the sliding member and the support member are hinged through a hinge rod;

[0014] The cutting assembly comprises: a threaded disk threadedly connected to the threaded area of ​​the sleeve rod; a cutting piece hinged on the threaded disk; and an adjusting assembly for driving the cutting piece to adjust its height and angle is fixedly mounted on the threaded disk.

[0015] The threaded disk is divided into a rotating area and a fixed area; and a guide groove is also provided on the fixed area of ​​the threaded disk;

[0016] The grinding assembly consists of a grinding piece, a fixing plate, and a connecting rod; the grinding piece is slidably mounted on the fixing plate via the connecting rod; the connecting rod passes through the guide groove and is slidably connected to the guide groove.

[0017] Furthermore, the threaded disk abuts against the sliding member through a locking mechanism.

[0018] Furthermore, the locking mechanism consists of a push rod fixedly installed in the rotating area of ​​the threaded disk; a sliding block slidably installed in the sliding groove; the interior of the sliding block is elastically connected to the extrusion bevel block via a return spring; the extrusion bevel block is elastically connected to the interior of the sliding block via a return spring; and the push rod abuts against the extrusion bevel block.

[0019] Furthermore, a one-way cone thorn is provided at the bottom of the extrusion inclined block, and a one-way fixing groove matching with the one-way cone thorn is provided at the bottom of the sliding groove.

[0020] Furthermore, the threads of the threaded area of ​​the sleeve rod are divided into two sections; the threads close to the pipe fitting section are denser than the threads far from the pipe fitting section.

[0021] Furthermore, the upper end of the grinding piece is elastically connected to the connecting rod through a spring.

[0022] Furthermore, the clamping mechanism is composed of a second motor, a rotating roller, an electric push rod, a clamping piece, and a transmission mechanism for the second motor to drive the rotating roller to rotate; the clamping piece is fixedly installed inside the rotating roller; the telescopic end of the electric push rod is fixedly connected to the clamping end of the clamping piece.

[0023] Furthermore, the adjustment component includes: a first cylinder 4431 for driving the cutting piece to move up and down; and a second cylinder for driving the cutting piece to adjust the slope.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The pipeline welding equipment of the present invention only needs to drive the sleeve rod to rotate through the forward and reverse motors, and clamp the inside of the pipe fitting by setting a fixed component, and can adapt to pipe fittings of different diameters; while supporting the inside of the pipe fitting, the cutting knife is moved to the pipe welding position, which can not only perform bevel cutting on the pipe before welding, but also grind and cut the grooves of different depths of the pipe fitting, so that the cut grooves are always at the optimal welding inclination; the welding effect is better; at the same time, when the threaded disk 441 moves, the grinding piece will approach the pipe fitting along the guide groove on the threaded disk, and grind the outer wall of the pipe fitting while grinding the pipe groove, further improving the welding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0027] Figure 1 It is a structural schematic diagram of a pipeline welding device of the present invention;

[0028] Figure 2 A front view of a pipeline welding device according to the present invention;

[0029] Figure 3 It is a structural schematic diagram of the processing mechanism in the present invention;

[0030] Figure 4 It is a front view of the processing mechanism in the present invention;

[0031] Figure 5 for Figure 4 A partial enlarged view of part A;

[0032] Figure 6 It is a schematic diagram of the structure of the sleeve rod in the invention;

[0033] Figure 7 for Figure 4 A partial cross-sectional view of section C;

[0034] Figure 8 for Figure 7 A partial enlarged view of part E in the middle;

[0035] Fig. 9 It is a structural schematic diagram of the threaded disk in the present invention;

[0036] Fig.10 is a side sectional view of the threaded disk of the present invention;

[0037] Fig.11 It is a structural schematic diagram of the cutting assembly in the present invention; Fig.12 It is a structural schematic diagram of the clamping mechanism in the present invention.

[0038] In the figure: 1, workbench; 2, welding machine; 3, clamping mechanism; 4, processing mechanism; 41, forward and reverse motor; 42, sleeve rod; 43, fixing assembly; 44, cutting assembly; 45, grinding assembly; 421, threaded area; 422, sleeve area; 423, sliding groove; 431, supporting member; 432, hinged rod; 433, sliding member; 441, threaded disk; 442, cutting member; 443, adjusting assembly; 4411, rotating area; 441 2. Fixed area; 4413. Guide groove; 451. Grinding piece; 452. Fixed plate; 453. Connecting rod; 46. Locking mechanism; 461. Push rod; 462. Sliding block; 463. Return spring; 464. Extrusion bevel block; 465. One-way cone thorn; 466. One-way fixed groove; 454. Spring; 31. Motor 2; 32. Rotating roller; 33. Electric push rod; 34. Clamping piece; 4431. First cylinder; 4432. Second cylinder. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are partial embodiments of the present invention, rather than all embodiments.

[0040] In the description of the present invention, it should be understood that the terms "center", "lateral", "longitudinal", "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention. When a mechanism is referred to as being "fixed to" another mechanism, it may be directly on the other mechanism or there may also be a centered mechanism. When a mechanism is considered to be "connected to" another mechanism, it may be directly connected to the other mechanism or there may be a centered mechanism at the same time. When a mechanism is considered to be "set on" another mechanism, it may be directly set on the other mechanism or there may be a centered mechanism at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0041] like Figures 1 to 12 As shown, a pipeline welding device of the present invention comprises: a workbench 1, a welding machine 2, a clamping mechanism 3 for clamping and transmitting pipe fittings, and a processing mechanism 4 for performing pre-welding processing on the clamped pipe fittings; through the above-mentioned mechanism, before welding the pipe fittings, it is only necessary to pass the pipe fittings to be welded through the clamping mechanism 3, sleeved on the processing mechanism 4, and the processing mechanism 4 performs pre-processing before welding, and a cylinder is provided at the bottom of the processing mechanism 4 to drive the processing mechanism 4 to move up and down. After the processing mechanism 4 processes the pipe fittings to be welded, the processing mechanism 4 is driven by the cylinder to retract to the lower end of the workbench 1, which does not affect subsequent welding and improves work coordination.

[0042] It should be added here that when the device is used, it needs to be used in conjunction with a transmission mechanism. The transmission mechanism mentioned above is preferably: a pushing cylinder that pushes the pipe to be processed to move toward the processing mechanism 4. Of course, for cost considerations, it is also possible to use manual handheld pipes to push.

[0043] The processing mechanism 4 is composed of a forward and reverse motor 41, a sleeve rod 42 coaxially connected to the forward and reverse motor 41, a fixing assembly 43, a cutting assembly 44 for cutting a groove on the inner wall of the pipe fitting, and a grinding assembly 45 for grinding the pipe fitting; the sleeve rod 42 is divided into a threaded area 421 and a sleeve area 422; and the threaded area 421 of the sleeve rod 42 is also provided with a sliding groove 423; by sleeve-shrouding the pipe fitting passing through the clamping mechanism 3 on the sleeve rod 42, the sleeve rod 42 is driven to rotate by the forward and reverse motor 41, thereby driving the fixing assembly 43, the cutting assembly 44, and the grinding assembly 45 to run synchronously; thereby improving the processing accuracy and efficiency, and enhancing the flexibility and ease of use of the system.

[0044] The cutting assembly 44 includes: a threaded disk 441 threadedly connected to the threaded area 421 in the sleeve rod 42; a cutting piece 442 hinged on the threaded disk 441; and an adjustment assembly 443 for driving the cutting piece 442 to adjust the height and angle is fixedly installed on the threaded disk 441. When the forward and reverse motor 41 rotates, the threaded disk 441 threadedly connected to the sleeve rod 42 moves along the sleeve rod 42. Since the cutting piece 442 is hinged on the threaded disk 441, when the threaded disk 441 moves along the sleeve rod 42 toward the pipe fitting, the cutting piece 442 approaches the pipe fitting synchronously to cut a groove for the subsequently rotating pipe fitting.

[0045] Beveling the pipe before welding can not only increase the depth and width of the weld, thereby improving the strength and durability of the weld joint, but also promote the flow and filling of the welding material, ensuring the integrity and sealing of the weld.

[0046] Since different pipe fittings have different pipe diameters and wall thicknesses, it is common knowledge that the choice of groove angle is directly related to the welding quality and strength; if the groove angle is too small, it may lead to insufficient welds, pores inside the welds and other problems, affecting the welding quality; and if the groove angle is too large, more filling materials and heat will be required for welding, the welding time will also be extended, and the stress generated during the welding process may be increased, further affecting the welding quality; therefore, when selecting the groove angle, it is necessary to comprehensively consider factors such as pipeline material, wall thickness, pipe diameter and welding process requirements to ensure the best welding effect; therefore, when cutting different pipe fittings, it is necessary to adjust the height and angle of the cutting piece 442.

[0047] The adjustment component 443 includes: a first cylinder 4431 for driving the cutting piece 442 to move up and down; a second cylinder 4432 for driving the cutting piece 442 to adjust the slope; the height of the cutting piece 442 is adjusted according to different pipe diameters by installing the first cylinder 4431 at the bottom of the cutting piece 442; the second cylinder 4432 is fixedly connected to the non-hinged end of the cutting piece 442 by hingedly connecting the cutting piece 442 to the threaded disk 441; and the push-out distance of the second cylinder 4432 is adjusted according to the wall thickness of the pipe; so that the cut groove is always at the best welding inclination; and the welding effect is better.

[0048] It should be noted here that the threads in the threaded area 421 of the sleeve rod 42 are divided into two sections; the threads close to the pipe section are denser than the threads far from the pipe section. By setting the coarse and fine threads, efficient interaction between the sleeve rod 42 and the threaded disk 441 can be achieved; when the threaded disk 441 moves to the coarse threaded area 421 for threaded connection, the rotation of the sleeve rod 42 will quickly drive the movement of the threaded disk 441, thereby improving the overall work efficiency; however, when more delicate operations are required, the threaded disk 441 moves to the fine threaded area 421 for connection with the fine threads; in this case, the rotation of the sleeve rod 42 will slow down the movement speed of the threaded disk 441, thereby ensuring that the cutting operation can be more fully performed in the process of gradually approaching the pipe.

[0049] The fixing assembly 43 includes: a support member 431; the support member 431 is hinged to the sleeve area 422 of the sleeve rod 42 through a hinge rod 432; a sliding member 433; the sliding member 433 is slidably installed on the sleeve area 422 of the sleeve rod 42; the sliding member 433 is hinged to the support member 431 through the hinge rod 432; the threaded disk 441 abuts against the sliding member 433 through a locking mechanism 46; when the forward and reverse motor 41 rotates, the sleeve rod 42 moves accordingly, because the threaded disk 441 abuts against the sliding member 433 through the locking mechanism 46, so that when the threaded disk 441 moves, the sliding member 433 is pushed to move in the same direction; and because the sliding member 433 is hinged to the support member 431 through the hinge rod 432, when the sliding member 433 slides, the hinged member is pushed to move, causing the support member 431 to open and close, thereby auxiliary clamping the pipe to be processed, thereby improving the stability, accuracy and efficiency of the welding process.

[0050] That is, the present application drives the sleeve rod 42 to rotate by the forward and reverse motor 41, so that on the one hand, the threaded disk 441 threadedly connected to the sleeve rod 42 moves toward the pipe fitting, squeezing the sliding block 462 to cause the support member 431 to open inside the pipe fitting and clamp the pipe fitting; on the other hand, when the threaded disk 441 moves toward the pipe fitting, the cutting member 442 hinged on the threaded disk 441 is pushed to the welding port of the pipe fitting for cutting.

[0051] The locking mechanism 46 is composed of a push rod 461 fixedly mounted on the rotating area 4411 of the threaded disk 441; a sliding block 462 slidably mounted in the sliding groove 423; the interior of the sliding block 462 is elastically connected to the extrusion bevel block 464 through a return spring 463; the extrusion bevel block 464 is elastically connected to the interior of the sliding block 462 through the return spring 463; the push rod 461 abuts against the extrusion bevel block 464; through the above mechanism, when the threaded disk 441 moves forward, the push rod 461 will first abut against the extrusion bevel block 464 inside the sliding block 462. It should be noted that: the return spring 463 has a certain elastic strength. When the push rod 461 abuts against the extrusion block, it will not directly push the mortgage bevel downward due to the elastic strength of the spring 454. The push rod 461 pushes the spring 454 to the left of the spring 454, and the push rod 461 passes through the slide block 462, and the slide 433 is no longer driven forward. When the fixing assembly 43 fixes the pipe firmly, the cutting assembly 44 can still move forward to grind and cut the grooves of the pipe with different depths.

[0052] Considering that since the push rod 461 no longer applies a pushing force to the sliding member 433, the tensioned support member 431 may push the sliding member 433 back to move backward, making it impossible to fix the pipe.

[0053] A one-way cone thorn 465 is also provided at the bottom of the extrusion bevel block 464, and a one-way fixed groove 466 matching the one-way cone thorn 465 is provided at the bottom of the sliding groove 423; by providing the one-way cone thorn 465, when the extrusion bevel block 464 is squeezed and moved downward by the push rod 461, it will be snapped into the one-way fixed groove 466, and due to the characteristics of the one-way cone thorn 465, the one-way cone thorn 465 can be pushed smoothly when moving forward, but cannot move when moving in the reverse direction; thereby solving the problem of the sliding member 433 moving backward and preventing the pipe clamping from loosening.

[0054] The threaded disk 441 is divided into a rotating area 4411 and a fixed area 4412; the threaded disk 441 is divided into the rotating area 4411 and the fixed area 4412; the push rod 461 is fixedly installed in the rotating area 4411; when the support member 431 supports the pipe fitting, it will drive the pipe fitting to rotate together; by setting the push rod 461 in the rotating area 4411, when the sleeve rod 42 and the push rod 461 rotate synchronously, the threaded disk 441 can continue to move along the thread on the sleeve rod 42.

[0055] A guide groove 4413 is also provided on the fixed area 4412 of the threaded disk 441; the grinding assembly 45 consists of a grinding piece 451, a fixed plate 452, and a connecting rod 453; the grinding piece 451 is slidably installed on the fixed plate 452 through the connecting rod 453; the connecting rod 453 passes through the guide groove 4413 and is slidably connected to the guide groove 4413; this patent is achieved by slidingly installing the grinding piece 451 on the fixed plate 452, and the connecting rod 453 passes through the guide groove 4413 and is slidably connected to the guide groove 4413; therefore, when the threaded disk 441 moves along the sleeve rod 42, the grinding piece 451 will move along the slotting direction of the guide groove 4413, because the slotting direction is gradually close to the pipe fitting, so when the threaded disk 441 moves, the grinding piece 451 will move toward the pipe fitting.

[0056] Through the above mechanism, when the threaded disk 441 moves along the direction of the pipe fitting, it can not only drive the support member 431 to clamp the pipe fitting inside and drive the pipe fitting to rotate synchronously after clamping, but also the cutting member 442 can still move towards the pipe fitting after clamping, so as to cut the pipe fitting. At the same time, when the threaded disk 441 moves, the grinding member 451 will approach the pipe fitting along the guide groove 4413 on the threaded disk 441 until it fits with the pipe fitting to complete the outer wall grinding.

[0057] It should be noted here that the connecting rod 453 and the guide groove 4413 are connected by ball sliding; the ball here can preferably be a bull's eye ball.

[0058] The upper end of the grinding piece 451 is elastically connected to the connecting rod 453 through a spring 454; by arranging the spring 454 between the grinding piece 451 and the connecting rod 453, pipe fittings of different diameters can be processed without being affected by the fixed travel distance of the grinding piece 451, and pipe fittings of different diameters can be ground.

[0059] The clamping mechanism 3 is composed of a second motor 31, a rotating roller 32, an electric push rod 33, a clamping piece 34, and a transmission mechanism for the second motor 31 to drive the rotating roller 32 to rotate; the clamping piece 34 is fixedly installed inside the rotating roller 32; the telescopic end of the electric push rod 33 is fixedly connected to the clamping end of the clamping piece 34; the staff passes the pipe to be welded through the clamping piece 34, and the electric push rod 33 pushes the clamping end of the clamping piece 34 to fix the pipe in the rotating roller 32, and then starts the second motor 31 to drive the rotating roller 32 to rotate, thereby driving the pipe to rotate, which serves as a rotation power source for subsequent welding processing.

[0060] As an extension of the present patent, a distance sensing unit is installed between the support member 431 and the polishing member 451; and an information processing unit for receiving the sensor information is provided; and an execution unit for the information processing unit is provided; when the polishing member 451 moves downward to the surface of the pipe and cannot move, the first distance between the two polishing members 451 is extracted; the polishing distance is the diameter of the pipe, and the diameter is converted into the specific moving distance of the first cylinder 4431 by the information processing unit; and it is transmitted to the execution unit, and the execution unit controls the first cylinder 4431 to push out the corresponding distance; and then when the support member 431 cannot continue to expand, the second distance between the support member 431 and the polishing member 451 is extracted; the distance is the wall thickness of the pipe; the wall thickness is converted into the specific moving distance of the first cylinder 4431 by the information processing unit; and it is transmitted to the execution unit, and the execution unit controls the second cylinder 4432 to push out the corresponding distance.

[0061] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. Machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here. The content not described in detail in this specification belongs to the prior art known to professional and technical personnel in this field.

[0062] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. A pipeline welding device, It is characterized in that include: A workbench, a welding machine, a clamping mechanism for clamping and transmitting pipe fittings, and a processing mechanism for pre-welding processing of the clamped pipe fittings; The processing mechanism is composed of a forward and reverse motor, a sleeve rod coaxially connected to the forward and reverse motor, a fixing assembly, a cutting assembly for cutting a groove on the inner wall of the pipe, and a grinding assembly for grinding the pipe; The sleeve rod is divided into a threaded area and a sleeve area; and the threaded area of ​​the sleeve rod is also provided with a sliding groove; The fixing assembly comprises: a support member; the support member is hinged to the sleeve area of ​​the sleeve rod through a hinge rod; a sliding member; the sliding member is slidably mounted on the sleeve area of ​​the sleeve rod; the sliding member and the support member are hinged through a hinge rod; The cutting assembly comprises: a threaded disk threadedly connected to the threaded area of ​​the sleeve rod; a cutting piece hinged on the threaded disk; and an adjusting assembly for driving the cutting piece to adjust its height and angle is fixedly mounted on the threaded disk. The threaded disk is divided into a rotating area and a fixed area; and a guide groove is also provided on the fixed area of ​​the threaded disk; The grinding assembly consists of a grinding piece, a fixing plate, and a connecting rod; the grinding piece is slidably mounted on the fixing plate via the connecting rod; the connecting rod passes through the guide groove and is slidably connected to the guide groove.

2. A pipeline welding device as claimed in claim 1, It is characterized in that The threaded disk abuts against the sliding member through a locking mechanism.

3. A pipeline welding device as claimed in claim 2, It is characterized in that The locking mechanism consists of a push rod fixedly installed in the rotating area of ​​the threaded disk; a sliding block slidably installed in the sliding groove; the interior of the sliding block is elastically connected to the extrusion bevel block via a return spring; the extrusion bevel block is elastically connected to the interior of the sliding block via a return spring; and the push rod abuts against the extrusion bevel block.

4. A pipe welding device as claimed in claim 3, It is characterized in that The bottom of the extrusion inclined block is also provided with a one-way cone thorn, and the bottom of the sliding groove is provided with a one-way fixing groove matching the one-way cone thorn.

5. A pipeline welding device as claimed in claim 1, It is characterized in that The threads of the threaded area of ​​the sleeve rod are divided into two sections; the threads close to the pipe fitting section are denser than the threads far from the pipe fitting section.

6. A pipeline welding device as claimed in claim 1, It is characterized in that The upper end of the grinding piece is elastically connected to the connecting rod through a spring.

7. A pipeline welding device as claimed in claim 1, It is characterized in that The clamping mechanism is composed of a second motor, a rotating roller, an electric push rod, a clamping piece, and a transmission mechanism for the second motor to drive the rotating roller to rotate; the clamping piece is fixedly installed inside the rotating roller; the telescopic end of the electric push rod is fixedly connected to the clamping end of the clamping piece.

8. A pipeline welding device as claimed in claim 1, It is characterized in that The adjustment component comprises: a first cylinder for driving the cutting piece to move up and down; and a second cylinder for driving the cutting piece to adjust the slope.

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