PE pipeline sweat soldering equipment

Abstract

The PE pipeline hot melting welding equipment comprises a workbench, moving plates are slidably connected to the two opposite sides of the workbench, fixing cylinders are arranged on the opposite end faces of the moving plates, the two fixing cylinders are coaxially arranged, a plurality of inner supporting assemblies are evenly arranged on the fixing cylinders in the axial direction at equal intervals, and each inner supporting assembly comprises a plurality of inner supporting plates; the multiple inner supporting plates are evenly distributed in the circumferential direction of the outer surfaces of the fixing barrels, each fixing barrel is provided with a driving assembly for driving the multiple inner supporting plates to synchronously move in the radial direction, and the driving assemblies drive the multiple inner supporting plates to synchronously expand outwards in the radial direction till the multiple inner supporting plates abut against the inner wall of the pipeline. The PE pipe welding device has the effect of improving the PE pipe welding quality.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of pipeline welding, in particular to a PE pipeline hot melting welding device. BACKGROUND

[0002] PE pipes include medium-density polyethylene pipes and high-density polyethylene pipes, the former is suitable for conveying gaseous artificial gas, natural gas and liquefied petroleum gas, and the latter is mainly used for conveying natural gas. Compared with steel pipes, the PE pipes have simple construction technology, certain flexibility and more importantly, do not need to be subjected to anticorrosion treatment, thereby saving a large number of processes.

[0003] At present, when the PE pipeline is welded, a ring-shaped heating plate is usually used to heat the opposite ends of the two pipelines, so that the surfaces of the two pipeline connections are in a molten state, thereby realizing the welding of the two plastic pipelines. However, the existing PE pipes are usually fixed by an external clamping mode. Since the PE pipe has certain flexibility, when the PE pipe is heated to a molten state, the pipe wall will soften. At this time, the clamping force of the external clamping will cause the local pipe wall to be pressed and deformed or even collapse inward, thereby reducing the welding quality of the PE pipe and having obvious defects. CONTENT OF THE UTILITY MODEL

[0004] In order to improve the welding quality of the PE pipeline, the application provides a PE pipeline hot melting welding device.

[0005] The PE pipeline hot melting welding device provided by the application adopts the following technical scheme:

[0006] The PE pipeline hot melting welding device comprises a workbench, a hot melting assembly is arranged on the workbench, opposite sides of the workbench are slidably connected with moving plates, opposite end faces of each moving plate are provided with fixed cylinders, the two fixed cylinders are coaxially arranged, a plurality of inner support assemblies are uniformly arranged on the fixed cylinders at equal intervals in the axial direction, the inner support assembly comprises a plurality of inner support plates, the plurality of inner support plates are uniformly distributed along the circumferences of the outer surfaces of the fixed cylinders, a driving assembly that drives the plurality of inner support plates to move synchronously in the radial direction is arranged on each fixed cylinder, and the driving assembly drives the plurality of inner support plates to abut against the inner sidewalls of the pipelines.

[0007] By adopting the above technical scheme, when welding is needed, workers suit two pipelines to the outer surfaces of the fixed cylinders, and then drive the plurality of inner support plates to synchronously expand outward in the radial direction until the inner support plates abut against the inner walls of the pipelines by the driving assembly. At this time, the plurality of inner support assemblies generate uniform upward supporting force on the pipelines, thereby effectively offsetting the downward pressure on the pipelines during hot melting, reducing the possibility of the pipe wall collapsing or locally deforming when hot melting, and improving the welding quality of the PE pipe.

[0008] Optionally, the driving assembly comprises a screw rod rotationally connected in the fixed cylinder, a driving block corresponding to each of the inner support assemblies is threadedly connected to the screw rod, the driving block is in the shape of a circular truncated cone, the outer surface of the driving block is provided with a connecting rod corresponding to each of the inner support plates, each of the connecting rods is slidingly connected to the surface of the driving block along the generatrix direction of the driving block, the fixed cylinder is provided with a limiting hole corresponding to each of the connecting rods, the connecting rod is slidingly arranged in the corresponding limiting hole, the end of the connecting rod extends to the outer surface of the fixed cylinder and is connected to the corresponding inner support plate, and the end of the screw rod is coaxially provided with a hand wheel, and the hand wheel is rotationally connected to the end of the fixed cylinder.

[0009] By adopting the above technical scheme, when fixing, the worker rotates the hand wheel to drive the screw rod to rotate, the screw rod drives the driving block to move from the small-diameter end to the large-diameter end, the movement of the connecting rod is limited in the limiting hole, and the connecting rod is pushed to move along the limiting hole towards the inner wall of the pipeline when the driving block moves, so that the plurality of inner support plates are synchronously moved towards the inner wall of the pipeline, the driving assembly is arranged to realize the synchronous operation of the plurality of inner support assemblies, ensure the expansion of the plurality of inner support plates to be consistent, avoid the local deformation of the pipe wall due to uneven distribution of the supporting force, and further improve the effect during the pipeline welding.

[0010] Optionally, the end of the connecting rod is provided with a limiting block, the driving block is provided with a limiting groove slidingly connected with the limiting block along the generatrix direction, and the limiting block and the limiting groove are both in the shape of a wedge.

[0011] By adopting the above technical scheme, under the limiting of the limiting block and the limiting groove, the connecting rod can only move along the generatrix direction of the driving block, so that the possibility of tilting of the connecting rod during the movement is reduced, and the stability of the inner support plate during the movement is ensured.

[0012] Optionally, the end face of each of the fixed cylinders close to the moving plate is provided with a locking assembly, the locking assembly comprises a mounting frame arranged at the end face of the fixed cylinder, the opposite sides of the mounting frame are both threadedly connected with a clamping stud, the screw rod is provided with a sliding groove along the axis, and a clamping ring plate is slidingly connected in the sliding groove, the clamping ring plate is attached to the end face of the fixed cylinder, and the clamping stud clamps the clamping ring plate against the end face of the fixed cylinder.

[0013] By adopting the technical scheme, when the pipeline is fixed, workers rotate the two abutting studs in turn, the abutting studs push the abutting ring plate to slide along the sliding groove in the axial direction and tightly press on the end face of the fixing cylinder, the abutting force of the abutting stud on the abutting ring plate and the friction force between the abutting ring plate and the end face of the fixing cylinder realize the limitation of the radial rotation of the abutting ring plate, thereby realizing the limitation of the rotation of the screw rod, effectively reducing the possibility that the fixed position of the inner support plate changes due to the accidental touch of the hand wheel by the worker, and thereby ensuring the stable support of the inner support assembly to the pipeline during the welding process.

[0014] Optionally, a plurality of accommodating ring grooves are formed on the fixing cylinder, and the surface of the abutting ring plate facing the fixing cylinder is provided with a plurality of plug-in rings for plug-in cooperation with the plurality of accommodating ring grooves.

[0015] By adopting the technical scheme, the abutting ring plate is abutted on the surface of the fixing cylinder by the rotation of the abutting stud, at this time, the plug-in ring is inserted into the accommodating ring groove along the inclined surface of the accommodating ring groove, under the abutting action of the abutting stud, the elastic plug-in ring is deformed in the accommodating ring groove and fills the accommodating ring groove, the friction force between the abutting ring plate and the end face of the fixing cylinder is enhanced through the interference fit between the plug-in ring and the accommodating ring groove, and thereby the locking effect of the locking assembly is further improved.

[0016] Optionally, a moving groove is formed on the workbench in the length direction, a bidirectional screw rod is rotationally connected in the moving groove, two sliding blocks are threadedly connected on the two ends of the bidirectional screw rod with opposite screw rotation directions, the cross sections of the sliding blocks and the moving groove are square, the two sliding blocks are arranged on the bottom surface of the moving plate respectively, and a driving motor is arranged on the outer surface of the workbench and drives the rotation of the bidirectional screw rod.

[0017] By adopting the technical scheme, when the two pipelines are both fixed, the driving motor drives the rotation of the bidirectional screw rod, the bidirectional screw rod drives the movement of the two moving plates towards opposite directions, the movement of the moving plates drives the two pipelines to move close to the hot melting assembly until abutting with each other, and then the hot melting assembly is started to perform hot melting welding, so that the automatic alignment of the two pipelines is realized, the whole process does not need manual operation of the worker, and the convenience of the operation of the worker during the welding process is improved.

[0018] Optionally, the end face of each fixing cylinder is provided with a circumferential scale mark, and the abutting ring plate is provided with a pointer for indicating the circumferential scale mark.

[0019] By adopting the technical scheme, the worker can intuitively judge the rotation angle of the screw rod through the corresponding relationship between the pointer and the circumferential scale mark, so as to ensure that the rotation angles of the screw rods in the fixing cylinders on both sides are consistent, avoid the reduction of the coaxiality of the two pipelines due to the adjustment difference on both sides, and thereby further improve the welding quality of the pipeline.

[0020] Optionally, each of the inner support plates is provided with a rubber pad towards the end face of the pipeline.

[0021] By adopting the above technical scheme, the rubber pad is arranged to form a flexible contact between the inner support plate and the inner wall of the pipeline, effectively preventing the pipeline from deforming, and the high friction property of the rubber pad can enhance the adhesion between the inner support plate and the pipeline wall, preventing the pipeline from sliding relative to each other during welding, and ensuring the butt joint accuracy.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] The present application sets the driving assembly and the inner support assembly, when welding is needed, the worker sets two pipelines on the outer surface of the fixed cylinder, then drives the driving assembly to expand the plurality of inner support plates radially and outwardly until abutting against the inner wall of the pipeline, at this time, the plurality of inner support assemblies generate uniform upward supporting force on the pipeline, effectively offsetting the downward pressure on the pipeline during hot melting, reducing the possibility of collapse or local concave deformation of the pipeline wall during hot melting, thereby improving the welding quality of the PE pipe.

[0024] The present application sets the locking assembly, when the pipeline is fixed, the worker rotates the two abutting studs in turn, the abutting studs push the abutting ring plate to slide axially along the sliding groove and tightly cover the end face of the fixed cylinder, the abutting force of the abutting stud on the abutting ring plate and the friction force between the abutting ring plate and the end face of the fixed cylinder realize the limitation of the radial rotation of the abutting ring plate, thereby realizing the limitation of the rotation of the screw rod, effectively reducing the possibility of the fixed position of the inner support plate changing due to the worker's accidental touch of the hand wheel, thereby ensuring the stable support of the inner support assembly on the pipeline during welding. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a structural schematic diagram of the present application.

[0026] Figure 2 is a sectional view of the fixed cylinder in the embodiment of the present application.

[0027] Figure 3 is Figure 2 is an enlarged view of A in

[0028] Figure 4 is an exploded schematic diagram of the abutting ring plate, the plug-in ring and the fixed cylinder in the embodiment of the present application.

[0029] Explanation of reference signs: 01, hot melting assembly; 1, workbench; 2, moving groove; 21, bidirectional screw rod; 22, sliding block; 23, moving plate; 24, driving motor; 3, fixed cylinder; 31, limiting hole; 32, containing ring groove; 4, inner support assembly; 41, inner support plate; 42, rubber pad; 5, driving assembly; 51, screw rod; 511, sliding groove; 52, driving block; 521, limiting groove; 53, connecting rod; 531, limiting block; 54, hand wheel; 6, locking assembly; 61, mounting frame; 62, abutting stud; 63, abutting ring plate; 631, plug-in ring; 7, circumferential scale mark; 71, pointer. DETAILED DESCRIPTION

[0030] The following will be described in detail in combination with the accompanying drawings. Figures 1-4 The application is further described in detail.

[0031] The embodiment of the application discloses a PE pipeline hot melting welding equipment.

[0032] Reference Figure 1 A PE pipeline hot melting welding equipment comprises a workbench 1, and a hot melting assembly 01 is arranged at the center of the workbench 1, wherein the hot melting assembly 01 comprises a mounting plate (not shown in the figure) fixedly installed on the workbench 1, and a ring-shaped heating plate (not shown in the figure) for hot melting is installed in the mounting plate.

[0033] Reference Figure 1 and Figure 2 The workbench 1 is provided with a moving groove 2 along the length direction, the moving groove 2 is rotationally connected with a bidirectional screw rod 21, the two ends of the bidirectional screw rod 21 are oppositely threaded, and the two ends of the bidirectional screw rod 21 are respectively threadedly connected with sliding blocks 22, the cross sections of the sliding blocks 22 and the moving groove 2 are both square, the surfaces of the two sliding blocks 22 are both fixedly connected with moving plates 23, the moving plates 23 are slidingly connected to the surface of the workbench 1, a driving motor 24 is fixedly installed on the outer surface of the workbench 1, and the output shaft of the driving motor 24 is fixedly connected with the bidirectional screw rod 21 in a same axis.

[0034] Reference Figure 1 and Figure 2 Each moving plate 23 is fixedly connected with a fixed cylinder 3, the axial direction of the fixed cylinder 3 is parallel to the length direction of the workbench 1, the two fixed cylinders 3 are coaxially arranged, and the fixed cylinders 3 are equally and uniformly arranged with a plurality of inner support assemblies 4 along the axial direction, the inner support assembly 4 comprises a plurality of inner support plates 41 slidingly connected to the outer surface of the fixed cylinder 3 along the radial direction, the plurality of inner support plates 41 are uniformly distributed along the circumferential direction of the outer surface of the fixed cylinder 3, the end face of the inner support plate 41 towards the inner wall of the pipeline is fixedly connected with a rubber pad 42, the rubber pad 42 is arranged to make the inner support plate 41 and the inner wall of the pipeline form flexible contact, and effectively prevent the pipeline from deforming.

[0035] Reference Figure 1 and Figure 2Each fixed cylinder 3 is provided with a driving assembly 5, the driving assembly 5 comprises a screw rod 51 rotatably connected in the fixed cylinder 3, the screw rod 51 is coaxially arranged with the fixed cylinder 3, a driving block 52 corresponding to the plurality of inner support assemblies 4 is threadedly connected on the screw rod 51, the driving block 52 is a circular truncated cone, a connecting rod 53 corresponding to the plurality of inner support plates 41 is arranged on the outer surface of the driving block 52, the driving block 52 is provided with a limiting groove 521 corresponding to the plurality of connecting rods 53 along the generatrix direction, the end of the connecting rod 53 close to the driving block 52 is fixedly connected with a limiting block 531, the limiting block 531 is slidably connected in the limiting groove 521, the limiting block 531 and the limiting groove 521 are both wedge-shaped, under the sliding cooperation of the limiting block 531 and the limiting groove 521, the connecting rod 53 is slidably connected on the surface of the driving block 52 along the generatrix direction of the driving block 52.

[0036] With reference to Figure 1 and Figure 2 A limiting hole 31 corresponding to the plurality of connecting rods 53 is arranged on the fixed cylinder 3, the length direction of the limiting hole 31 is parallel to the radial direction of the fixed cylinder 3, the connecting rod 53 is slidably arranged in the corresponding limiting hole 31, the end of the connecting rod 53 extends to the outer surface of the fixed cylinder 3 and is fixedly connected with the corresponding inner support plate 41, the end of the screw rod 51 is coaxially fixedly connected with a hand wheel 54, the hand wheel 54 is rotatably connected at the end of the fixed cylinder 3.

[0037] When welding is needed, the worker sets two pipes on the outer surface of the fixed cylinder 3, then the worker rotates the hand wheel 54 to make the screw rod 51 rotate, the rotation of the screw rod 51 drives the driving block 52 to move from the small diameter end to the large diameter end, since the movement of the connecting rod 53 is limited in the limiting hole 31, the connecting rod 53 will be moved along the limiting hole 31 when the driving block 52 moves, the connecting rod 53 drives the plurality of inner support plates 41 to synchronously expand outward along the radial direction until abutting against the inner wall of the pipe, when the two pipes are both fixed, the driving motor 24 starts to drive the bidirectional screw rod 21 to rotate, the rotation of the bidirectional screw rod 21 drives the two moving plates 23 to move towards the opposite directions, the movement of the moving plates 23 drives the two pipes to move close to the hot melting assembly 01 until abutting against each other, then the hot melting assembly 01 is started to perform hot melting welding;

[0038] The plurality of inner support assemblies 4 generate uniform upward supporting force on the pipes, effectively offset the downward pressure received by the pipes during hot melting, reduce the possibility of collapse or local concave deformation of the pipe wall during hot melting, thereby improving the welding quality of the PE pipe.

[0039] With reference to Figure 2 and Figure 3Each fixed cylinder 3 is provided with a locking assembly 6 near the end face of the moving plate 23, the locking assembly 6 comprises a mounting frame 61 fixedly installed on the end face of the fixed cylinder 3, and the opposite sides of the mounting frame 61 are threadedly connected with abutting studs 62, the screw rod 51 is provided with a sliding groove 511 in the axial direction, and the sliding groove 511 is slidably connected with an abutting ring plate 63, the abutting ring plate 63 is slidably sleeved on the outer surface of the screw rod 51, and the abutting ring plate 63 is attached to the end face of the fixed cylinder 3.

[0040] With reference to Figure 2 and Figure 3 , a plurality of accommodating ring grooves 32 are formed in the fixed cylinder 3, the surface of the abutting ring plate 63 towards the fixed cylinder 3 is fixedly connected with a plurality of plug-in rings 631 in plug-in cooperation with the plurality of accommodating ring grooves 32, the cross sections of the accommodating ring grooves 32 and the plug-in rings 631 are V-shaped, and the plug-in rings 631 are made of elastic material.

[0041] When the pipe is fixed, the workers rotate the two abutting studs 62 in turn, the abutting studs 62 push the abutting ring plate 63 to slide along the sliding groove 511 in the axial direction and tightly cover the end face of the fixed cylinder 3, and when the abutting ring plate 63 moves, the plug-in rings 631 are inserted into the accommodating ring grooves 32, at this time, under the abutting action of the abutting studs 62, the elastic plug-in rings 631 are deformed in the accommodating ring grooves 32 and fill the accommodating ring grooves 32, so that the friction between the abutting ring plate 63 and the end face of the fixed cylinder 3 is increased, and the radial rotation of the abutting ring plate 63 is effectively limited through the friction, so as to realize the limitation of the rotation of the screw rod 51, effectively reduce the possibility that the fixed position of the inner support plate 41 changes due to the worker's accidental touch of the hand wheel 54, and thus ensure the stable support of the inner support assembly 4 to the pipe during the welding process.

[0042] With reference to Figure 2 and Figure 4 , the end face of each fixed cylinder 3 is provided with a circumferential scale mark 7, and the abutting ring plate 63 is fixedly connected with a pointer 71 for indicating the circumferential scale mark 7, the workers can intuitively judge the rotation angle of the screw rod 51 through the corresponding relationship between the pointer 71 and the circumferential scale mark 7, ensure that the rotation angles of the screw rods 51 in the two fixed cylinders 3 remain consistent, and avoid the difference in adjustment of the two sides to reduce the coaxiality of the two pipes.

[0043] The implementation principle of the PE pipe hot melt welding equipment provided in the embodiments of the present application is as follows: when welding is needed, a worker sets two pipes on the outer surface of the fixing cylinder 3, then the worker rotates the hand wheel 54 to rotate the screw rod 51, the rotation of the screw rod 51 drives the driving block 52 to move from the small-diameter end to the large-diameter end, since the movement of the connecting rod 53 is limited in the limiting hole 31, the driving block 52 will push the connecting rod 53 to move along the limiting hole 31 when the driving block 52 moves, the connecting rod 53 drives the plurality of inner support plates 41 to expand radially and synchronously outward until abutting against the inner wall of the pipe, when the two pipes are fixed, the driving motor 24 is started to drive the bidirectional screw rod 21 to rotate, the rotation of the bidirectional screw rod 21 drives the two moving plates 23 to move towards opposite directions, the movement of the moving plates 23 drives the two pipes to be close to the hot melt assembly 01 until abutting against each other, then the hot melt assembly 01 is started to perform hot melt welding;

[0044] The plurality of inner support assemblies 4 generate uniform upward supporting force on the pipes, effectively offset the downward pressure received by the pipes during hot melting, reduce the possibility of collapse or local concave deformation of the pipe wall during hot melting, thereby improving the welding quality of the PE pipe.

[0045] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, therefore: any equivalent changes made according to the structure, shape, principle of the present application should be covered in the protection scope of the present application.

Claims

1. A PE pipe hot-melt welding device, comprising a workbench (1), wherein a hot-melt assembly (01) is provided on the workbench (1), characterized in that, The workbench (1) has movable plates (23) slidably connected to its opposite sides. Each movable plate (23) has a fixed cylinder (3) on its opposite end face. The two fixed cylinders (3) are coaxially arranged. The fixed cylinders (3) are evenly arranged with multiple inner support components (4) at equal intervals along the axial direction. Each inner support component (4) includes multiple inner support plates (41). The multiple inner support plates (41) are evenly distributed along the outer surface of the fixed cylinder (3). Each fixed cylinder (3) is provided with a driving component (5) that drives the multiple inner support plates (41) to move synchronously in the radial direction. The driving component (5) drives the multiple inner support plates (41) to abut against the inner wall of the pipe.

2. The PE pipe hot melt welding equipment according to claim 1, characterized in that, The drive assembly (5) includes a screw (51) rotatably connected inside the fixed cylinder (3). The screw (51) is threaded with drive blocks (52) corresponding to a plurality of inner support assemblies (4). The drive blocks (52) are frustoconical in shape. The outer surface of the drive blocks (52) is provided with connecting rods (53) corresponding to a plurality of inner support plates (41). Each connecting rod (53) is slidably connected to the surface of the drive block (52) along the generatrix direction of the drive block (52). The fixed cylinder (3) is provided with limiting holes (31) corresponding to a plurality of connecting rods (53). The connecting rods (53) slide through the corresponding limiting holes (31). The end of the connecting rod (53) extends to the outer surface of the fixed cylinder (3) and is connected to the corresponding inner support plate (41). The end of the screw (51) is coaxially provided with a handwheel (54). The handwheel (54) is rotatably connected to the end of the fixed cylinder (3).

3. The PE pipe hot melt welding equipment according to claim 2, characterized in that, The end of the connecting rod (53) is provided with a limiting block (531), and the driving block (52) is provided with a limiting groove (521) along the generatrix direction that is slidably connected to the limiting block (531). Both the limiting block (531) and the limiting groove (521) are wedge-shaped.

4. The PE pipe hot melt welding equipment according to claim 2, characterized in that, Each of the fixed cylinders (3) is provided with a locking assembly (6) on the end face near the moving plate (23). The locking assembly (6) includes a mounting frame (61) provided on the end face of the fixed cylinder (3). The mounting frame (61) is threaded with abutting studs (62) on both sides opposite to each other. The screw (51) is provided with a sliding groove (511) along the axis. Abutting ring plate (63) is slidably connected in the sliding groove (511). The abutting ring plate (63) is in contact with the end face of the fixed cylinder (3). The abutting studs (62) press the abutting ring plate (63) against the end face of the fixed cylinder (3).

5. The PE pipe hot melt welding equipment according to claim 4, characterized in that, The fixed cylinder (3) is provided with a plurality of receiving ring grooves (32). The surface of the abutting ring plate (63) facing the fixed cylinder (3) is provided with a plug-in ring (631) that is inserted into and cooperates with the plurality of receiving ring grooves (32). The cross sections of the receiving ring grooves (32) and the plug-in ring (631) are both V-shaped. The plug-in ring (631) is made of elastic material.

6. The PE pipe hot melt welding equipment according to claim 1, characterized in that, The workbench (1) has a moving groove (2) along its length. A bidirectional lead screw (21) is rotatably connected in the moving groove (2). Sliding blocks (22) are threaded onto the two ends of the bidirectional lead screw (21) with opposite thread directions. The cross-sections of the sliding blocks (22) and the moving groove (2) are both square. The two sliding blocks (22) are respectively set on the bottom surface of the moving plate (23). A drive motor (24) for driving the bidirectional lead screw (21) to rotate is provided on the outer surface of the workbench (1).

7. The PE pipe hot melt welding equipment according to claim 4, characterized in that, Each of the fixed cylinders (3) has a circumferential scale mark (7) on its end face, and the abutting ring plate (63) has a pointer (71) for indicating the circumferential scale mark (7).

8. The PE pipe hot melt welding equipment according to claim 1, characterized in that, Each of the inner support plates (41) is provided with a rubber pad (42) on the end face facing the pipe.

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