A welding positioning device for HDPE pipes

Abstract

The utility model relates to pipeline positioning technical field, concretely relates to a kind of welding positioning device for HDPE pipeline, including mesa, recess is opened in the length direction on mesa upper surface;At least two sliding seats are slidably arranged in the recess;The upper surface of each sliding seat is fixedly provided with the clamping group for clamping the end of pipeline and the support group for supporting the bottom of pipeline;The clamping group includes the clamping frame fixed on the sliding seat, chuck center on one of the sliding seat is fixedly provided with infrared emitter, chuck center on the other sliding seat is fixedly provided with infrared receiver matched with infrared emitter;The infrared light beam emitted by infrared emitter is received by infrared receiver, for indicating and adjusting the axial alignment of two chucks, to realize the axial alignment of the two HDPE pipelines being clamped, by setting infrared emitter in chuck center and infrared receiver in the other chuck, the axial alignment of two pipelines when welding can be accurately adjusted.

Description

Technical Field

[0001] This utility model relates to the field of pipeline positioning technology, and more specifically, to a welding positioning device for HDPE pipelines. Background Technology

[0002] In HDPE pipe welding operations, the accuracy of the pipe welding positioning device directly affects the welding quality.

[0003] Existing welding positioning devices often lack an effective axis alignment mechanism when welding pipelines, making it difficult to ensure accurate alignment of the axes of two pipelines. This leads to pipeline misalignment and displacement during the welding process, resulting in weak welds and poor sealing. This not only affects the performance and service life of the pipelines but may also cause safety hazards such as leaks during use, increasing the cost of later maintenance and repair.

[0004] Therefore, there is an urgent need for a welding positioning device for HDPE pipes to improve the shortcomings of existing technologies. Utility Model Content

[0005] The purpose of this invention is to provide a welding positioning device for HDPE pipes. By placing an infrared transmitter at the center of the chuck and cooperating with an infrared receiver in the chuck on the other side, it is possible to precisely adjust the alignment of the axes of two pipes during welding, thereby solving the problems mentioned in the background art.

[0006] Existing welding positioning devices often lack an effective axis alignment mechanism when welding pipes, making it difficult to ensure that the axes of two pipes are accurately aligned. This leads to pipe misalignment and displacement during the welding process, resulting in problems such as weak welds and poor sealing.

[0007] To achieve the above objectives, this utility model provides a welding positioning device for HDPE pipes, including a table, the upper surface of which has a groove along its length; at least two sliding seats are slidably disposed in the groove; each sliding seat has a clamping assembly for clamping the pipe end and a support assembly for supporting the pipe bottom fixedly disposed on its upper surface;

[0008] The clamping assembly includes a clamping frame fixed on a sliding seat. The clamping frame includes a lower fixed part and an upper movable part, and the upper movable part is vertically and vertically connected to the lower fixed part.

[0009] A hydraulic push rod for driving its lifting and lowering is fixedly connected to the lower surface of the upper movable part; a chuck for clamping the pipe is fixedly installed at the upper end of the upper movable part.

[0010] An infrared transmitter is fixedly installed at the center of the chuck on one of the sliding seats, and an infrared receiver that cooperates with the infrared transmitter is fixedly installed at the center of the chuck on the other sliding seat. The infrared beam emitted by the infrared transmitter is received by the infrared receiver, which is used to indicate and adjust the axial alignment of the two chucks, thereby achieving the axial alignment of the two clamped HDPE pipes.

[0011] In the above technical solution, at least two sliding seats are slidably installed in the groove on the table, and their positions can be adjusted according to the pipe welding requirements. The support group on each sliding seat first supports the bottom of the pipe. The lower fixed part and the upper movable part of the clamping group are connected by a hydraulic push rod. When the pipe is placed, the hydraulic push rod drives the upper movable part to rise and fall, so that the chuck clamps the end of the pipe. The infrared emitter in the center of one chuck emits an infrared beam. If the infrared receiver in the center of the other chuck receives the beam, it indicates that the two chucks are aligned. At this time, the two HDPE pipes are also aligned. If they are not received, the position of the sliding seat or the height of the hydraulic push rod is adjusted until the infrared receiver receives the beam, thereby achieving precise alignment of the pipe's axis before welding.

[0012] Based on this, when the pipe is placed on top of the support frame, the rollers contact the outer wall of the pipe to form rolling support; the support frame is driven to rise and fall vertically by rotating the screw, which drives the pipe to make synchronous height fine adjustments; the design that the rollers are aligned with the pipe axis means that the pipe only needs to overcome rolling friction when moving horizontally to center, which not only ensures the smooth translation of the sliding seat, but also avoids scratches on the pipe surface, and finally achieves coordinated and precise adjustment of the pipe welding posture.

[0013] In another technical solution, sliding grooves are respectively opened on the inner walls of both sides of the groove along its length direction, and several pulleys are respectively provided on both sides of the sliding seat. The pulleys are embedded in the sliding grooves and slide along them. The cylinder of the hydraulic push rod is fixedly connected to the lower fixed part, and the piston rod end of the hydraulic push rod is fixedly connected to the upper movable part. The inner side wall of the chuck is provided with an elastic buffer layer.

[0014] In this technical solution, the sliding grooves on both sides of the inner wall of the groove and the pulleys on both sides of the sliding seat form a guiding structure. When the position of the sliding seat needs to be adjusted, the pulleys are embedded in the sliding grooves and slide along their length, reducing frictional resistance and ensuring the smooth movement of the sliding seat. The cylinder of the hydraulic push rod is fixed to the lower fixed part, and the piston rod drives the upper movable part to move up and down, thereby precisely adjusting the height of the chuck to adapt to the clamping requirements of pipes of different diameters. When clamping the pipe, the elastic buffer layer on the inner wall of the chuck fills the gap between the pipe and the chuck through its own deformation. This provides sufficient clamping force to prevent the pipe from shaking and avoids hard clamping that may cause indentations or damage to the surface of the HDPE pipe. Combined with the axis alignment indication function of the infrared transmitter and receiver, it achieves precise positioning and protection of the pipe before welding.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] This welding positioning device for HDPE pipes, by placing an infrared transmitter in the center of the chuck and cooperating with an infrared receiver in the chuck on the other side, can precisely adjust the axial alignment of two pipes during welding, fundamentally solving the problem of weak welds caused by misalignment. Meanwhile, the design of the sliding seat in conjunction with the groove, sliding groove, and pulley allows the sliding seat to slide flexibly on the table, facilitating pipe position adjustment; the screw in the support assembly allows for height adjustment of the support frame, accommodating pipes of different diameters and enhancing the device's versatility; the rollers on the support frame reduce friction during pipe placement, while the elastic buffer layer on the inner wall of the chuck protects the pipe surface when clamping it. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the embodiment;

[0018] Figure 2 This is a schematic diagram of the tabletop structure in an embodiment;

[0019] Figure 3 This is a schematic diagram of the adjustment structure in an embodiment;

[0020] Figure 4 This is a cross-sectional schematic diagram of the clamping assembly in an embodiment.

[0021] The meanings of the labels in the diagram are as follows:

[0022] 100. Countertop; 101. Groove; 102. Sliding groove;

[0023] 200. Sliding seat; 201. Pulley; 210. Clamping assembly; 211. Clamping frame; 2110. Lower fixed part; 2111. Upper movable part; 212. Hydraulic push rod; 213. Chuck; 214. Infrared transmitter; 220. Support assembly; 221. Base; 222. Screw; 223. Support frame. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Current welding positioning devices often lack an effective axial alignment mechanism when welding pipes, making it difficult to ensure accurate alignment of the axes of two pipes. This leads to pipe misalignment and displacement during welding, resulting in weak welds and poor sealing. Please refer to [link to relevant documentation]. Figures 1-4 As shown, this embodiment provides a welding positioning device for HDPE pipes, including a table 100, and a groove 101 is formed on the upper surface of the table 100 along the length direction; at least two sliding seats 200 are slidably arranged in the groove 101; each sliding seat 200 has a clamping group 210 for clamping the end of the pipe and a support group 220 for supporting the bottom of the pipe fixedly arranged on its upper surface.

[0026] The clamping assembly 210 includes a clamping frame 211 fixed on the sliding seat 200. The clamping frame 211 includes a lower fixed part 2110 and an upper movable part 2111. The upper movable part 2111 is vertically and vertically connected to the lower fixed part 2110.

[0027] A hydraulic push rod 212 for driving its lifting and lowering is fixedly connected to the lower surface of the upper movable part 2111; a chuck 213 for clamping the pipe is fixedly installed at the upper end of the upper movable part 2111.

[0028] An infrared transmitter 214 is fixedly installed at the center of the chuck 213 on one of the sliding seats 200, and an infrared receiver that cooperates with the infrared transmitter 214 is fixedly installed at the center of the chuck 213 on the other sliding seat 200. The infrared beam emitted by the infrared transmitter 214 is received by the infrared receiver and used to indicate and adjust the axial alignment of the two chucks 213, thereby achieving the axial alignment of the two clamped HDPE pipes.

[0029] During implementation, firstly, based on the length of the two HDPE pipes to be welded and the welding position, the relative positions of at least two sliding seats 200 are adjusted by sliding within the groove 101 on the platform 100. The sliding grooves 102 on both sides of the groove 101 and the pulleys 201 on both sides of the sliding seat 200 form a guiding mechanism. The pulleys 201 are embedded in the sliding grooves 102 and roll, allowing the sliding seat 200 to slide smoothly along the length of the groove 101, while reducing frictional resistance and ensuring convenient position adjustment.

[0030] After the sliding seat 200 is adjusted to the appropriate position, the two HDPE pipes are placed on the support groups 220 of the corresponding sliding seats 200. The base 221 of the support group 220 can adjust the height of the support frame 223 by rotating the screw 222. The rollers on the support frame 223 contact the bottom of the pipe, which not only provides adaptive support according to the pipe diameter, but also reduces friction by rolling the rollers when the pipe is placed. After the pipe is stably placed, the hydraulic push rod 212 of the clamping group 210 is activated. The cylinder of the hydraulic push rod 212 is fixed to the lower fixed part 2110, and the piston rod extends upward to drive the upper movable part 2111 to slide and rise and fall along the lower fixed part 2110, so that the chuck 213 at the upper end of the upper movable part 2111 gradually approaches the end of the pipe.

[0031] When the elastic buffer layer on the inner wall of the chuck 213 contacts the outer wall of the pipe, it fits tightly against the pipe through its own elastic deformation, providing a uniform clamping force to prevent the pipe from shaking and avoiding damage to the pipe surface by hard compression. At this time, the infrared emitter 214 fixed in the center of one of the chucks 213 emits an infrared beam. If the infrared receiver in the center of the other chuck 213 receives the beam, it means that the axes of the two chucks 213 are on the same straight line, that is, the axes of the two HDPE pipes are precisely aligned. If the infrared receiver does not receive the beam, further fine-tuning is required: the horizontal relative position of the two chucks 213 can be adjusted by pushing the sliding seat 200 slightly within the groove 101, or the height of the upper movable part 2111 can be finely adjusted by restarting the hydraulic push rod 212 to change the vertical position of the chuck 213.

[0032] See Figure 2 As shown, the sliding grooves 102 formed along the length of the inner walls on both sides of the groove 101, together with the several pulleys 201 arranged on both sides of the sliding seat 200, constitute a sliding guide structure. When it is necessary to adjust the position of the sliding seat 200 within the groove 101, the pulleys 201 are embedded in the sliding grooves 102, using rolling friction instead of sliding friction, which greatly reduces the resistance when the sliding seat 200 moves, allowing the operator to more easily push the sliding seat 200 to move horizontally along the length of the groove 101.

[0033] Figure 3In this design, the base 221 of the support assembly 220 is fixed to the sliding seat 200. The vertical screw 222 rotatably connected to the base 221 forms a helical transmission mechanism with the upper support frame 223. When the screw 222 is rotated, its rotational motion is converted into the vertical lifting motion of the support frame 223: rotating the screw 222 clockwise moves the support frame 223 upward along the axis of the screw 222, increasing the support height; rotating it counterclockwise moves the support frame 223 downward, decreasing the support height. In this way, the height of the support frame 223 can be precisely adjusted according to the diameter of the HDPE pipe or the welding position requirements, ensuring that the rollers on the support frame 223 fit tightly against the bottom of the pipe. This provides stable support for the pipe and, in conjunction with the chuck 213 of the clamping assembly 210, allows for synchronous adjustment of the pipe's axis height, ensuring that the beams of the infrared transmitter 214 and the receiver are aligned, thereby guaranteeing precise positioning of the pipe's axis during welding.

[0034] Additionally, see Figure 3 As shown, when the hydraulic system injects hydraulic oil into the cylinder, the hydraulic oil pushes the piston rod upward, causing the upper movable part 2111 to rise vertically along the lower fixed part 2110, raising the upper chuck 213 to the position where it clamps the pipe. When the hydraulic system releases the hydraulic oil from the cylinder, the piston rod retracts into the cylinder under external load or its own reset mechanism, and the upper movable part 2111 moves downward to reset. Through the extension and retraction of the hydraulic push rod 212, the lifting height of the upper movable part 2111 can be precisely controlled, thereby adjusting the clamping position of the chuck 213 on the HDPE pipe. Combined with the axial alignment indication of the infrared transmitter 214 and receiver, precise positioning of the pipe's height before welding is achieved. Simultaneously, the hydraulic drive features stable output force and high adjustment accuracy, effectively ensuring the reliability and stability of the clamping process.

[0035] See Figure 4 As shown, when the chuck 213 clamps the HDPE pipe, the elastic buffer layer is in direct contact with the outer wall of the pipe. Because HDPE pipe is relatively soft, traditional rigid clamping can easily cause surface indentations or deformation. However, the elastic buffer layer will undergo elastic deformation under the clamping force, and its own flexible buffering will offset the clamping pressure, so that the clamping force is evenly distributed on the pipe surface, avoiding local stress concentration.

[0036] In this embodiment, a welding positioning device for HDPE pipes is used in the following way: First, the groove 101 on the platform 100 serves as a sliding track. The sliding grooves 102 on both sides of the platform 100 cooperate with the pulleys 201 on both sides of the sliding seat 200, allowing at least two sliding seats 200 to slide smoothly along the length of the groove 101. The spacing is adjusted according to the length of the pipe to be welded. The support group 220 on each sliding seat 200 drives the support frame 223 with rollers on the top to rise and fall by rotating the screw 222 on the base 221, so as to adapt to HDPE pipes of different diameters. The rolling direction of the rollers is consistent with the axial direction of the pipe, which facilitates pipe placement and reduces friction. The lower fixed part 2110 of the clamping assembly 210 is fixed on the sliding seat 200. The cylinder of the hydraulic push rod 212 is connected to the lower fixed part 2110. The piston rod drives the upper movable part 2111 to rise and fall, causing the upper chuck 213 to move closer to or away from the pipe. The elastic buffer layer on the inner wall of the chuck 213 undergoes elastic deformation when it contacts the pipe, evenly dispersing the clamping force and preventing damage to the pipe surface.

[0037] After the two HDPE pipes are placed on the support groups 220 on both sides, the hydraulic jack 212 is activated to clamp the pipe ends with the chuck 213. At this time, the infrared emitter 214 at the center of one of the chucks 213 emits an infrared beam. If the infrared receiver at the center of the other chuck 213 receives the beam, it indicates that the axes of the two chucks 213 are aligned, meaning that the axes of the two pipes are on the same straight line. If the beam is not received, the position of the sliding seat 200 in the groove 101 is finely adjusted, or the extension and retraction of the hydraulic jack 212 is readjusted, until the infrared receiver accurately receives the beam. During this process, the rollers of the support group 220 support the weight of the pipes, the elastic buffer layer ensures that the chuck 213 is firmly clamped, the cooperation between the sliding groove 102 and the pulley 201 ensures the movement accuracy of the sliding seat 200, and the hydraulic jack 212 provides a stable driving force, ultimately achieving precise alignment of the axes of the HDPE pipes before welding, providing a reliable positioning basis for high-quality welding.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A welding positioning device for HDPE pipes, comprising a platform (100), characterized in that: The upper surface of the table (100) is provided with a groove (101) along the length direction; at least two sliding seats (200) are slidably arranged in the groove (101); each sliding seat (200) is fixedly provided with a clamping group (210) for clamping the end of the pipe and a support group (220) for supporting the bottom of the pipe on its upper surface; The clamping assembly (210) includes a clamping frame (211) fixed on the sliding seat (200). The clamping frame (211) includes a lower fixed part (2110) and an upper movable part (2111). The upper movable part (2111) is vertically connected to the lower fixed part (2110). The lower surface of the upper movable part (2111) is fixedly connected to a hydraulic push rod (212) for driving its lifting and lowering; the upper end of the upper movable part (2111) is fixedly installed with a chuck (213) for clamping the pipe; An infrared transmitter (214) is fixedly installed at the center of the chuck (213) on one of the sliding seats (200), and an infrared receiver that cooperates with the infrared transmitter (214) is fixedly installed at the center of the chuck (213) on the other sliding seat (200). The infrared beam emitted by the infrared transmitter (214) is received by the infrared receiver and used to indicate and adjust the axial alignment of the two chucks (213), thereby achieving the axial alignment of the two clamped HDPE pipes.

2. The welding positioning device for HDPE pipes according to claim 1, characterized in that: The inner walls on both sides of the groove (101) are respectively provided with sliding grooves (102) along their length.

3. The welding positioning device for HDPE pipes according to claim 2, characterized in that: The sliding seat (200) is provided with several pulleys (201) on both sides, and the pulleys (201) are embedded in the sliding groove (102) and slide along it.

4. The welding positioning device for HDPE pipes according to claim 1, characterized in that: The support assembly (220) includes a base (221) fixed on a sliding seat (200), a vertical screw (222) rotatably connected to the base (221), and a support frame (223) for supporting the pipe connected to the upper end of the screw (222). Rotating the screw (222) can drive the support frame (223) to rise and fall to adjust its height.

5. The welding positioning device for HDPE pipes according to claim 4, characterized in that: The top of the support frame (223) is rotatably equipped with several rollers, the rolling direction of which is consistent with the axial direction of the pipe, for contacting and supporting the outer wall of the pipe.

6. The welding positioning device for HDPE pipes according to claim 1, characterized in that: The cylinder of the hydraulic push rod (212) is fixedly connected to the lower fixed part (2110), and the piston rod end of the hydraulic push rod (212) is fixedly connected to the upper movable part (2111).

7. The welding positioning device for HDPE pipes according to claim 1, characterized in that: The inner wall of the chuck (213) is provided with an elastic buffer layer, which is used to reduce damage to the pipe surface when clamping the pipe.

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