Assisted machining apparatus for pipe welding

Abstract

An assisted machining apparatus for pipe welding, which relates to the technical field of assisted machining for welding and comprises a positioning unit (100), which comprises a driving assembly (101), two movable pressing assemblies (102) symmetrically arranged at two ends of the driving assembly (101), a limiting assembly (103) arranged at one end of each movable pressing assembly (102), a locking assembly (104) arranged outside of each limiting assembly (103), and a protection assembly (105) arranged at one end of each limiting assembly (104). The positioning unit (100) is provided to activate the driving assembly (101) to drive the two movable pressing assemblies (102) to each move toward the middle until a pushing rod (102b) is in contact with a contraction member (104f) and pushes the contraction member (104f) to pull the locking assembly (104) fixedly connected at the top to move toward the middle and release the limiting assembly (103) from a locked state. When the movement continues until the movable pressing assemblies (102) are each engaged inside of a locking assembly (104), the contraction member (104f), pushed by an unlocking rod (104f-8), is unlocked from a locked state and then loses contact with the pushing rod (102b), and the locking assembly (104) returns to the initial position to lock the limiting assembly (103) and the movable pressing assembly (102) that are in an engaged state, thus improving the accuracy of positioning in the radial direction during pipe docking. Each protection assembly (105), pushed by the movement of a locking assembly (104), is completely unfolded to achieve locking by means of engagement, and protect against strong light and spatter generated during welding.

Description

Pipeline welding auxiliary processing device TECHNICAL FIELD

[0001] The present application relates to the technical field of welding auxiliary processing, in particular to a pipeline welding auxiliary processing device. BACKGROUND

[0002] The pipeline is a kind of equipment composed of multiple parts such as pipes, pipe connecting pieces and valves, mainly used for conveying gas, liquid or liquid medium with solid particles. In the petroleum, chemical, electric power, construction and other industries in China, metal pipeline welding technology is a very important link. In the welding process of metal pipeline, it must be precisely butt welded.

[0003] However, in the current pipeline welding technology, there are some problems. For example, in the splicing and welding stage of multi-section pipeline, the two sections of pipeline to be welded need to be aligned manually by manual operation, but due to the limited precision of manual operation, the pipeline butt joint may be misaligned, affecting the welding quality. The existing pipeline welding tools, such as welding tooling, can play a fixing role, but due to the limitation of design, it is difficult to accurately center the butt welding end of the two pipelines, which needs to be adjusted left and right repeatedly, which not only reduces the welding efficiency, but also easily causes errors, thereby affecting the welding quality. SUMMARY

[0004] In view of the above or existing problems in the prior art, the present application is proposed.

[0005] Therefore, the purpose of the present application is to provide a pipeline welding auxiliary processing device which can position the pipeline during welding, lock after positioning to avoid sliding during welding and affect the welding quality, and protect the workers during welding.

[0006] To solve the above technical problems, the present application provides the following technical scheme: a pipeline welding auxiliary processing device, comprising a positioning unit, including a driving assembly, two groups of moving extrusion assemblies symmetrically arranged at both ends of the driving assembly, a limiting assembly arranged at one end of the moving extrusion assembly, a locking assembly arranged outside the limiting assembly, and a protection assembly arranged at one end of the limiting assembly;

[0007] The moving extrusion assembly comprises a moving limiting rod, a push rod fixedly connected with the inner wall of the moving limiting rod, a clamping sleeve fixedly connected with the top of the moving limiting rod, a limiting groove arranged at one end of the clamping sleeve, an extrusion clamping block arranged at one end of the limiting groove, and a clamping groove arranged at one end of the extrusion clamping block;

[0008] The limiting assembly comprises a fixed rod, a limiting sleeve fixedly connected to the top of the fixed rod, two groups of sliding limiting grooves symmetrically arranged on both sides of the limiting sleeve, a plurality of groups of extrusion holes arranged around one end of the limiting sleeve, a limiting ball arranged in the extrusion hole, a fixed ring arranged in the middle of the limiting sleeve, and an extrusion spring fixedly connected to one end of the fixed ring.

[0009] The locking assembly comprises a locking sleeve, two groups of sliding blocks symmetrically arranged on the inner wall of the locking sleeve, a pushing groove arranged at one end of the locking sleeve, an extrusion block arranged at one end of the pushing groove, a spring contraction groove arranged at one end of the extrusion block, and a contraction piece fixedly connected to the bottom of the locking sleeve.

[0010] As a preferred scheme of the pipeline welding auxiliary processing device, the driving assembly comprises a support bottom plate, a fixed seat fixedly connected to the top of the support bottom plate, a driving motor fixedly connected to the top of the fixed seat, a driving rod arranged at one end of the driving motor, a connecting plate arranged at one end of the driving rod, two groups of threaded rods symmetrically arranged at both ends of the driving rod, and a moving limiting groove arranged at the bottom of the threaded rod.

[0011] As a preferred scheme of the pipeline welding auxiliary processing device, the protection assembly comprises a first protection fixed block fixedly connected to the top of the limiting sleeve, a first sliding groove arranged in the middle of the first protection fixed block, a first spring contraction hole arranged at one end of the first protection fixed block, a first return spring fixedly connected to one end of the first spring contraction hole, a protection storage plate fixedly connected to one end of the first return spring, a storage groove arranged in the middle of the protection storage plate, two groups of fixed holes symmetrically arranged at both ends of the storage groove, and a protection clamping piece symmetrically arranged at one end of the first protection fixed block.

[0012] As a preferred scheme of the pipeline welding auxiliary processing device, the contraction piece comprises a contraction limiting block, a contraction limiting groove arranged at the bottom of the contraction limiting block, a contraction spring fixedly connected to the top of the contraction limiting groove, a contraction block fixedly connected to one end of the contraction spring, a limiting spring fixedly connected to the side wall of the contraction block, a locking block fixedly connected to one end of the limiting spring, a locking hole arranged in the inner side of the contraction limiting block, and an unlocking rod fixedly connected to the middle of the moving limiting rod.

[0013] As a preferred scheme of the pipeline welding auxiliary processing device, the protection clamping piece comprises a second protection fixed block, a second sliding groove arranged in the middle of the second protection fixed block, a second spring contraction hole arranged at one end of the second protection fixed block, a second return spring fixedly connected to one end of the second spring contraction hole, a protection clamping plate fixedly connected to one end of the second return spring, and two groups of spring fixed blocks symmetrically arranged at both ends of the protection clamping plate.

[0014] As a preferred scheme of the pipeline welding auxiliary processing device, the moving limiting groove is arranged on the top of the support bottom plate, the inner side wall of the connecting plate is rotationally connected with one end of the driving rod, the middle part of the driving rod is arranged as a smooth surface, and the moving limiting rod is threadedly connected with the threaded rod.

[0015] As a preferred scheme of the pipeline welding auxiliary processing device, the spring fixing block is matched with the fixing hole, the unlocking rod is in a horizontal position, the locking hole is matched with the unlocking rod, and the locking block is matched with the locking hole.

[0016] The pipeline welding auxiliary processing device has the following beneficial effects: the positioning unit is arranged, the two groups of moving extrusion assemblies are driven by the driving assembly to move to the middle part, the pushing rod is in contact with the contraction piece, the contraction piece pulls the top fixedly connected locking assembly to move to the middle part to release the locking state of the limiting assembly, when the moving extrusion assembly is clamped into the locking assembly, the contraction piece is released from the locking state to shrink under the pushing of the unlocking rod, the contact between the pushing rod and the contraction piece is lost, the locking assembly returns to the initial position, the clamped limiting assembly and the moving extrusion assembly are locked, the positioning accuracy of the pipeline in the radial direction is improved, the protection assembly is completely expanded to be clamped and locked under the pushing of the moving locking assembly, and the strong light and splashes generated during welding are protected. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort. Among them:

[0018] Fig. 1 is a schematic diagram of the overall structure of the pipeline welding auxiliary processing device.

[0019] Fig. 2 is another perspective view of the overall structure of the pipeline welding auxiliary processing device.

[0020] Fig. 3 is an enlarged schematic diagram of A in Fig. 2 of the pipeline welding auxiliary processing device.

[0021] Fig. 4 is an exploded schematic diagram of the limiting assembly of the pipeline welding auxiliary processing device.

[0022] Fig. 5 is another perspective view of the overall structure of the pipeline welding auxiliary processing device.

[0023] Fig. 6 is an enlarged schematic diagram of B in Fig. 5 of the pipeline welding auxiliary processing device.

[0024] Fig. 7 is an exploded schematic diagram of the contraction piece of the pipeline welding auxiliary processing device.

[0025] Fig. 8 is an enlarged view of the pipe welding auxiliary processing device at C in Fig. 7.

[0026] Fig. 9 is a cross-sectional view of the locking assembly of the pipe welding auxiliary processing device.

[0027] In the drawings: 100, positioning unit; 101, driving assembly; 102, moving extrusion assembly; 103, limiting assembly; 104, locking assembly; 105, protection assembly; 101a, support bottom plate; 101b, fixed seat; 101c, driving motor; 101d, driving rod; 101e, connecting plate; 101f, threaded rod; 101g, moving limiting groove; 102a, moving limiting rod; 102b, pushing rod; 102c, clamping sleeve; 102d, limiting groove; 102e, extrusion clamping block; 102f, clamping groove; 103a, fixed rod; 103b, limiting sleeve; 103c, sliding limiting groove; 103d, extrusion hole; 103e, limiting ball; 103f, fixed ring; 103g, extrusion spring; 104a, locking sleeve; 104b, sliding block; 104c, pushing groove; 104d, extrusion stop block; 104e, spring contraction groove; 104f, contraction piece; 104f-1, contraction limiting block; 104f-2, contraction limiting groove; 104f-3, contraction spring; 104f-4, contraction block; 104f-5, limiting spring; 104f-6, locking block; 104f-7, locking hole; 104f-8, unlocking rod; 105a, first protection fixed block; 105b, first sliding groove; 105c, first spring contraction hole; 105d, first return spring; 105e, protection storage plate; 105f, storage groove; 105g, fixed hole; 105h, protection clamping piece; 105h-1, second protection fixed block; 105h-2, second sliding groove; 105h-3, second spring contraction hole; 105h-4, second return spring; 105h-5, protection clamping plate; 105h-6, spring fixed block. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objectives, characteristics and advantages of the present application more apparent and comprehensible, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0029] In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the concept of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0030] Secondly, the "one embodiment" or "embodiment" referred to herein is intended to mean a specific feature, structure, characteristic, or combination of features and characteristics described herein that is included in at least one implementation of the present application. Each of the various embodiments described throughout this description are not necessarily all referring to the same embodiment; however, neither are the various embodiments mutually exclusive, but can also be combined with one another.

[0031] In an embodiment, referring to FIGS. 1-9, a first embodiment of the present application provides a pipeline welding auxiliary processing device, which comprises a positioning unit 100. Two groups of mobile extrusion assemblies 102 are driven by a driving assembly 101 to move towards the middle, and a locking assembly 104 is pushed to one side to release the limiting state of a limiting assembly 103. The mobile extrusion assemblies 102 continue to be driven to move towards the middle, and when the mobile extrusion assemblies 102 and the limiting assembly 103 complete the clamping state, the locking assembly 104 releases the pushing of the mobile extrusion assemblies 102 to return to the initial position, and locks the limiting assembly 103 and the mobile extrusion assemblies 102, thereby maintaining the stability during welding and improving the protection during welding.

[0032] Specifically, the positioning unit 100 comprises the driving assembly 101, two groups of mobile extrusion assemblies 102 symmetrically arranged at both ends of the driving assembly 101, the limiting assembly 103 arranged at one end of the mobile extrusion assemblies 102, the locking assembly 104 arranged outside the limiting assembly 103, and the protection assembly 105 arranged at one end of the limiting assembly 103.

[0033] The mobile extrusion assembly 102 comprises a mobile limiting rod 102a, a pushing rod 102b fixedly connected with the inner wall of the mobile limiting rod 102a, a clamping sleeve 102c fixedly connected with the top of the mobile limiting rod 102a, a limiting groove 102d arranged at one end of the clamping sleeve 102c, an extrusion clamping block 102e arranged at one end of the limiting groove 102d, and a clamping groove 102f arranged at one end of the extrusion clamping block 102e.

[0034] The limiting assembly 103 comprises a fixed rod 103a, a limiting sleeve 103b fixedly connected with the top of the fixed rod 103a, two groups of sliding limiting grooves 103c symmetrically arranged at both sides of the limiting sleeve 103b, a plurality of groups of extrusion holes 103d circumferentially arranged at one end of the limiting sleeve 103b, a limiting ball 103e arranged inside the extrusion hole 103d, a fixed ring 103f arranged at the middle of the limiting sleeve 103b, and an extrusion spring 103g fixedly connected with one end of the fixed ring 103f.

[0035] The locking assembly 104 comprises a locking ring 104a, two groups of sliding blocks 104b symmetrically arranged on the inner wall of the locking ring 104a, a pushing groove 104c arranged at one end of the locking ring 104a, an extrusion stop block 104d arranged at one end of the pushing groove 104c, a spring retraction groove 104e arranged at one end of the extrusion stop block 104d, and a retraction piece 104f fixedly connected to the bottom of the locking ring 104a.

[0036] Further, the driving assembly 101 comprises a supporting bottom plate 101a, a fixed seat 101b fixedly connected to the top of the supporting bottom plate 101a, a driving motor 101c fixedly connected to the top of the fixed seat 101b, a driving rod 101d arranged at one end of the driving motor 101c, a connecting plate 101e arranged at one end of the driving rod 101d, two groups of threaded rods 101f symmetrically arranged at two ends of the driving rod 101d, and a movement limiting groove 101g arranged at the bottom of the threaded rod 101f.

[0037] Further, the protection assembly 105 comprises a first protection fixed block 105a fixedly connected to the top of the limiting sleeve 103b, a first sliding groove 105b arranged in the middle of the first protection fixed block 105a, a first spring retraction hole 105c arranged at one end of the first protection fixed block 105a, a first return spring 105d fixedly connected to one end of the first spring retraction hole 105c, a protection storage plate 105e fixedly connected to one end of the first return spring 105d, a storage groove 105f arranged in the middle of the protection storage plate 105e, two groups of fixed holes 105g symmetrically arranged at two ends of the storage groove 105f, and protection clamping pieces 105h symmetrically arranged at one end of the first protection fixed block 105a.

[0038] Preferably, the driving motor 101c is started to drive the driving rod 101d to rotate, the two groups of threaded rods 101f at two ends of the driving rod 101d drive the two groups of movement limiting rods 102a connected by threads to move to the middle under the limitation of the movement limiting groove 101g at the bottom, the pushing rod 102b fixedly connected to the inner wall of the movement limiting rod 102a moves to contact the side wall of the retraction block 104f-4 in the locked state, the retraction block 104f-4 moves to one side, the retraction limiting block 104f-1 fixedly connected to the top retraction spring 104f-3 pulls the retraction block 104f-4, the two groups of sliding blocks 104b fixedly connected to the inner wall of the locking ring 104a slide to the middle under the limitation of the two groups of sliding limiting grooves 103c on the two sides of the limiting sleeve 103b, the limiting ball 103e extruded by the inner wall of the extrusion stop block 104d is released from the extrusion state after the extrusion stop block 104d moves out of the range of the extrusion hole 103d, the vertical surface at one end of the extrusion stop block 104d pushes the extrusion spring 103g to retract in the spring retraction groove 104e, the limiting sleeve 103b is released from the limiting state, and the clamping sleeve 102c and the limiting sleeve 103b are clamped.

[0039] Further, the contraction member 104f includes a contraction limiting block 104f-1, a contraction limiting groove 104f-2 arranged at the bottom of the contraction limiting block 104f-1, a contraction spring 104f-3 fixedly connected with the top of the contraction limiting groove 104f-2, a contraction block 104f-4 fixedly connected with one end of the contraction spring 104f-3, a limiting spring 104f-5 fixedly connected with the side wall of the contraction block 104f-4, a locking block 104f-6 fixedly connected with one end of the limiting spring 104f-5, a locking hole 104f-7 arranged inside the contraction limiting block 104f-1, and an unlocking rod 104f-8 fixedly connected with the middle part of the movement limiting rod 102a.

[0040] Preferably, the clamping sleeve 102c continues to move to the middle part along with the movement limiting rod 102a at the bottom, is inserted into the inside of the limiting sleeve 103b, extrudes the arc-shaped surface at one side of the clamping block 102e to contact with the plurality of groups of limiting balls 103e, extrudes the limiting balls 103e after losing the limiting, and moves the limiting balls 103e from the inside to the outside of the extrusion hole 103d. The outside surface of the limiting ball 103e enters the pushing groove 104c. When the clamping sleeve 102c continues to move to the state that the clamping groove 102f is parallel to the plurality of groups of extrusion holes 103d, the movement limiting rod 102a reaches the maximum movement distance. The contraction limiting block 104f-1 is moved to the unlocking rod 104f-8 in contact with the locking block 104f-6 under the pushing of the pushing rod 102b, extrudes the locking block 104f-6, and makes the locking block 104f-6 compress the limiting spring 104f-5 to generate deformation and shrink into the inside of the contraction limiting groove 104f-2. After losing the locking and limiting of the locking block 104f-6, the contraction spring 104f-3 in the pulling-up state pulls the contraction block 104f-4 at the bottom to shrink into the inside of the contraction limiting groove 104f-2 upward. The contraction block 104f-4 moves to the top of the pushing rod 102b, loses the pushing force of the pushing rod 102b, and the locking sleeve 104a at the top slides to the initial position under the rebounding force of the extrusion spring 103g. The inclined surface at one end of the extrusion block 104d extrudes the limiting ball 103e, and makes the limiting ball 103e shrink into the inside of the clamping groove 102f. The extrusion block 104d continues to move, the bottom part blocks the outside of the extrusion hole 103d, and the limiting ball 103e limits and locks the clamping sleeve 102c in the clamping state with the limiting sleeve 103b, avoids the disengagement during welding, and maintains the stability during welding.

[0041] Further, the protection clamping piece 105h comprises a second protection fixed block 105h-1, a second sliding groove 105h-2 arranged at the middle of the second protection fixed block 105h-1, a second spring contraction hole 105h-3 arranged at one end of the second protection fixed block 105h-1, a second return spring 105h-4 fixedly connected with one end of the second spring contraction hole 105h-3, a protection clamping plate 105h-5 fixedly connected with one end of the second return spring 105h-4, and two groups of spring fixed blocks 105h-6 symmetrically arranged at both ends of the protection clamping plate 105h-5.

[0042] Further, the moving limiting groove 101g is arranged at the top of the support bottom plate 101a, the inner side wall of the connecting plate 101e is rotationally connected with one end of the driving rod 101d, the middle part of the driving rod 101d is arranged as a smooth surface, and the moving limiting rod 102a is threadedly connected with the threaded rod 101f.

[0043] Further, the spring fixed block 105h-6 is matched with the fixed hole 105g, the unlocking rod 104f-8 is in a horizontal position, the locking hole 104f-7 is matched with the unlocking rod 104f-8, and the locking block 104f-6 is matched with the locking hole 104f-7.

[0044] It should be explained that the distance of the pushing rod 102b close to is greater than the distance of one end of the clamping sleeve 102c close to, when the compression spring 103g is completely contracted, the clamping sleeve 102c moves to the parallel state of the clamping groove 102f of the outer wall and the compression hole 103d, the diameter of the limiting ball 103e is greater than the diameter of the inner wall of the compression hole 103d, the fixed ring 103f is fixedly connected with the middle part of the limiting sleeve 103b, the outer diameter of the compression clamping block 102e is the same as the inner diameter of the limiting sleeve 103b, the limiting ball 103e is matched with the clamping groove 102f, one end of the compression stop block 104d close to the pushing groove 104c is arranged as an inclined surface, the other end of the compression stop block 104d is arranged as a vertical surface and is in contact with the compression spring 103g, the inner diameter of the compression stop block 104d is the same as the outer diameter of the limiting sleeve 103b, the inner diameter of the spring contraction groove 104e is the same as the outer diameter of the fixed ring 103f, the lowest end of the contraction block 104f-4 is at the bottom of the pushing rod 102b, the length of the protection clamping plate 105h-5 is less than the length of the protection storage plate 105e, the thickness of the protection clamping plate 105h-5 is the same as the width of the storage groove 105f, and the screw connection places of the two groups of moving limiting rods 102a and the threaded rod 101f are reverse threads.

[0045] In use, the locking assembly 104 is released from the limiting state of the limiting assembly 103, the driving motor 101c drives the driving rod 101d to rotate, the two groups of threaded rods 101f at both ends of the driving rod 101d drive the two groups of movable limiting rods 102a connected by threads to move to the middle under the limitation of the moving limiting groove 101g at the bottom, the push rod 102b fixedly connected with the inner wall of the movable limiting rod 102a moves to contact the side wall of the contraction block 104f-4 in the locking state, the contraction block 104f-4 moves to one side, the contraction limiting block 104f-1 fixedly connected with the top contraction spring 104f-3 pulls the locking sleeve 104a to slide to the middle under the limitation of the two groups of sliding limiting grooves 103c on both sides of the limiting sleeve 103b through the two groups of sliding blocks 104b fixedly connected with the inner wall, the limiting ball 103e extruded by the inner wall of the extrusion block 104d is released from the extrusion state after the extrusion block 104d moves out of the range of the extrusion hole 103d, the vertical surface at one end of the extrusion block 104d pushes the extrusion spring 103g to contract in the spring contraction groove 104e, and the limiting sleeve 103b is released from the limiting state, so that the clamping sleeve 102c and the limiting sleeve 103b are clamped.

[0046] The mobile extrusion assembly 102 and the limiting assembly 103 are locked, the clamping sleeve 102c continues to follow the movement of the bottom limiting rod 102a to the middle, inserts into the inside of the limiting sleeve 103b, and the arc surface on one side of the extrusion clamping block 102e contacts with several groups of limiting balls 103e, extrudes the limiting balls 103e that have lost the limiting, and makes the limiting balls 103e move from the inside of the extrusion hole 103d to the outside, the outside surface of the limiting ball 103e enters the pushing groove 104c, the clamping sleeve 102c continues to move to the parallel state of the clamping groove 102f and several groups of extrusion holes 103d, the movement limiting rod 102a reaches the maximum movement distance, the contraction limiting block 104f-1 moves to the unlocking rod 104f-8 in contact with the locking block 104f-6 under the pushing of the pushing rod 102b, extrudes the locking block 104f-6, makes the locking block 104f-6 compress the limiting spring 104f-5 to generate deformation and shrink into the inside of the contraction limiting groove 104f-2, the contraction spring 104f-3 in the pulling-up state loses the locking and limiting of the locking block 104f-6, pulls the bottom contraction block 104f-4 upward to shrink into the inside of the contraction limiting groove 104f-2, the contraction block 104f-4 moves to the top of the pushing rod 102b, loses the pushing force of the pushing rod 102b, the top locking sleeve 104a slides to the initial position under the rebounding force of the extrusion spring 103g, extrudes the limiting ball 103e through the inclined surface on one end of the extrusion stop block 104d, makes the limiting ball 103e shrink into the inside of the extrusion hole 103d, enters the inside of the clamping groove 102f, and the extrusion stop block 104d continues to move, the bottom blocks the outside of the extrusion hole 103d, limits the limiting ball 103e, and limits the clamping sleeve 102c in the clamping state with the limiting sleeve 103b, avoids the disengagement during welding, and maintains the stability during welding.

[0047] The welding position is protected, the locking sleeve 104a moves to the middle, pushes the protection storage plate 105e, extrudes the first reset spring 105d, and limits the first sliding groove 105b in the middle of the first protection fixed block 105a to move to the middle, the protection clamping plate 105h-5 is pushed to the middle by another group of locking sleeves 104a, extrudes the second reset spring 105h-4, and limits the second sliding groove 105h-2 in the middle of the second protection fixed block 105h-1 to move to the middle, the protection clamping plate 105h-5 is inserted into the storage groove 105f in the middle of the protection storage plate 105e, until the two groups of spring fixed blocks 105h-6 and the two groups of fixed holes 105g are in the horizontal state, the two groups of spring fixed blocks 105h-6 enter the inside of the two groups of fixed holes 105g under the action of the spring, and the protection clamping plate 105h-5 and the protection storage plate 105e are in the clamping state, and the strong light and splashes generated during welding are protected.

[0048] To sum up, the application sets the positioning unit, the starting drive assembly drives two groups of mobile extrusion assemblies to move to the middle, moves to the contact of the push rod and the contraction piece, pulls the contraction piece to move to the middle to release the locking state of the limiting assembly, continues to move to the mobile extrusion assembly, and the contraction piece releases the locking state to shrink after the push of the unlocking rod, loses the contact with the push rod, and the locking assembly returns to the initial position, completes the locking of the clamping state of the limiting assembly and the mobile extrusion assembly, improves the positioning accuracy of the radial direction of the pipeline butt joint, and protects the assembly under the push of the locking assembly to completely expand to realize the clamping locking, protects the strong light and splashes generated during welding.

[0049] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not limited. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application, which should be covered in the scope of the claims of the present application.

Claims

1. A pipe welding auxiliary machining device characterized by: The utility model relates to a positioning unit (100) including drive assembly (101), two groups of mobile extrusion assembly (102) that symmetrically arranged in both ends of drive assembly (101), limiting assembly (103) that sets up in one end of mobile extrusion assembly (102), locking assembly (104) that sets up in the outside of limiting assembly (103) and protection assembly (105) that sets up in one end of limiting assembly (103), The mobile extrusion assembly (102) includes a mobile limiting rod (102a), a push rod (102b) fixedly connected with the inner wall of the mobile limiting rod (102a), a clamping sleeve (102c) fixedly connected with the top of the mobile limiting rod (102a), a limiting groove (102d) arranged at one end of the clamping sleeve (102c), an extrusion clamping block (102e) arranged at one end of the limiting groove (102d), and a clamping groove (102f) arranged at one end of the extrusion clamping block (102e). The limiting assembly (103) includes a fixed rod (103a), a limiting sleeve (103b) fixedly connected with the top of the fixed rod (103a), two groups of sliding limiting grooves (103c) symmetrically arranged on both sides of the limiting sleeve (103b), a plurality of extrusion holes (103d) circumferentially arranged at one end of the limiting sleeve (103b), a limiting ball (103e) arranged inside the extrusion hole (103d), a fixed ring (103f) arranged in the middle of the limiting sleeve (103b), and an extrusion spring (103g) fixedly connected with one end of the fixed ring (103f). The locking assembly (104) includes a locking sleeve ring (104a), two groups of sliding blocks (104b) symmetrically arranged on the inner wall of the locking sleeve ring (104a), a push groove (104c) arranged at one end of the locking sleeve ring (104a), an extrusion stop block (104d) arranged at one end of the push groove (104c), a spring contraction groove (104e) arranged at one end of the extrusion stop block (104d), and a contraction piece (104f) fixedly connected with the bottom of the locking sleeve ring (104a). The drive assembly (101) includes a support bottom plate (101a), a fixed seat (101b) fixedly connected with the top of the support bottom plate (101a), a drive motor (101c) fixedly connected with the top of the fixed seat (101b), a drive rod (101d) arranged at one end of the drive motor (101c), a connecting plate (101e) arranged at one end of the drive rod (101d), two groups of threaded rods (101f) symmetrically arranged at both ends of the drive rod (101d), and a mobile limiting groove (101g) arranged at the bottom of the threaded rod (101f).

2. The pipe welding auxiliary machining device of claim 1, wherein: ​ 3. The pipe welding auxiliary machining device of claim 2, wherein: The protection assembly (105) comprises a first protection fixed block (105a) fixedly connected with the top of the limiting sleeve (103b), a first sliding groove (105b) arranged in the middle of the first protection fixed block (105a), a first spring contraction hole (105c) arranged at one end of the first protection fixed block (105a), a first reset spring (105d) fixedly connected with one end of the first spring contraction hole (105c), a protection storage plate (105e) fixedly connected with one end of the first reset spring (105d), a storage groove (105f) arranged in the middle of the protection storage plate (105e), two groups of fixed holes (105g) symmetrically arranged at both ends of the storage groove (105f), and a protection clamping piece (105h) symmetrically arranged at one end of the first protection fixed block (105a).

4. The pipe welding auxiliary machining device of claim 3, wherein: The contraction piece (104f) comprises a contraction limiting block (104f-1), a contraction limiting groove (104f-2) arranged at the bottom of the contraction limiting block (104f-1), a contraction spring (104f-3) fixedly connected with the top of the contraction limiting groove (104f-2), a contraction block (104f-4) fixedly connected with one end of the contraction spring (104f-3), a limiting spring (104f-5) fixedly connected with the side wall of the contraction block (104f-4), a locking block (104f-6) fixedly connected with one end of the limiting spring (104f-5), a locking hole (104f-7) arranged on the inner side of the contraction limiting block (104f-1), and an unlocking rod (104f-8) fixedly connected with the middle of the movement limiting rod (102a).

5. The pipe welding auxiliary machining device of claim 4, wherein: The protection clamping piece (105h) comprises a second protection fixed block (105h-1), a second sliding groove (105h-2) arranged in the middle of the second protection fixed block (105h-1), a second spring contraction hole (105h-3) arranged at one end of the second protection fixed block (105h-1), a second reset spring (105h-4) fixedly connected with one end of the second spring contraction hole (105h-3), a protection clamping plate (105h-5) fixedly connected with one end of the second reset spring (105h-4), and two groups of spring fixed blocks (105h-6) symmetrically arranged at both ends of the protection clamping plate (105h-5).

6. The pipe welding auxiliary machining device of claim 5, wherein: The movement limiting groove (101g) is arranged at the top of the support bottom plate (101a), the inner side wall of the connecting plate (101e) is rotationally connected with one end of the driving rod (101d), the middle of the driving rod (101d) is arranged as a smooth surface, and the movement limiting rod (102a) is threadedly connected with the threaded rod (101f).

7. The pipe welding auxiliary machining device of claim 6, wherein: The spring fixing block (105h-6) is matched with the fixing hole (105g), the unlocking rod (104f-8) is in a horizontal position with the locking hole (104f-7), the locking hole (104f-7) is matched with the unlocking rod (104f-8), and the locking block (104f-6) is matched with the locking hole (104f-7).

8. The pipe welding aid apparatus of claim 1, wherein: An arc-shaped surface is arranged on one side of the extrusion clamping block (102e) close to the locking assembly (104).

9. The pipe welding aid apparatus of claim 1, wherein: The outer diameter of the extrusion clamping block (102e) is the same as the inner diameter of the limiting sleeve (103b).

10. The pipe welding aid apparatus of claim 1, wherein: An inclined surface is arranged on one end of the extrusion block (104d) close to the pushing groove (104c), and a vertical surface is arranged on the other end of the extrusion block (104d) and is in contact with the extrusion spring (103g).

11. The pipe welding aid apparatus of claim 1, wherein: The lowest end of the contraction block (104f-4) is at the bottom of the pushing rod (102b).

12. The pipe welding auxiliary machining device of claim 4, wherein: The length of the protection clamping plate (105h-5) is less than the length of the protection receiving plate (105e).

13. The pipe welding auxiliary machining device of claim 4, wherein: The thickness of the protection clamping plate (105h-5) is the same as the width of the receiving groove (105f).

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