Portable PE pipe electric fusion welding fixture

Abstract

The utility model relates to pipeline engineering technical field, specifically disclose a kind of portable PE pipe electric fusion welding fixture, it include installation part, including first installation base and the second installation base of installation by the chute of first installation base side setting, first installation base and the second installation base are equipped with installation guide rail on it;Clamp main body includes first clamping part and second clamping part, and one end of first clamping part and second clamping part is hinged, and the other end is detachably connected;The clamp main body is also equipped with the installation hole of even angular distribution, each installation hole can be provided with one clamping block, the clamping block is equipped with two at least, and clamping block can be installed on the clamp main body by installation hole, after a plurality of clamping blocks are installed on the clamp main body, clamping space is formed between a plurality of clamping blocks;By the clamp main body of movable connection is respectively set in different positions of installation base, realize one machine multiuse, have extensive practical value and popularization significance.

Description

Technical Field

[0001] This utility model relates to the field of pipeline engineering technology, and in particular to a lightweight PE pipe electrofusion welding fixture. Background Technology

[0002] In the installation and emergency repair of PE pipes (polyethylene pipes), electrofusion welding is a key process for achieving pipe connections, and its welding quality directly affects the sealing performance and operational safety of the pipeline system. To ensure precise alignment and stable fixation of pipes and fittings during the welding process, specialized welding fixtures are required.

[0003] Currently, commonly used PE pipe electrofusion welding clamps in the industry have a significant limitation of limited functionality: the existing clamps are only designed to accommodate the welding clamping needs of cylindrical pipe fittings, and cannot provide effective fixation when welding irregularly shaped pipe fittings such as elbows, tees, and end caps. This deficiency is particularly prominent in emergency repair operations in the gas and water supply sectors; the space at the repair site is limited, and if multiple special clamps adapted to different pipe fittings are prepared in advance, it will occupy a large amount of storage space in the repair vehicle, increasing the cost of carrying equipment; if not prepared in advance, it is necessary to temporarily return to the warehouse to retrieve the corresponding clamps, causing the repair operation to be interrupted, prolonging the gas and water outage time, which not only affects the user experience, but may also reduce the reliability of pipeline operation.

[0004] Meanwhile, the single-function design of existing clamps limits their versatility, requiring construction companies to purchase and maintain multiple sets of specialized clamps, increasing equipment investment and management costs. Therefore, developing a multi-functional PE pipe welding clamp compatible with various pipe fittings such as sleeves, elbows, and tees has become a key requirement for solving the pain points of existing technology and improving operational efficiency. Utility Model Content

[0005] In view of this, the present invention provides a lightweight PE pipe electrofusion welding clamp to solve the problem that existing clamps can only be used for welding clamping scenarios of sleeves, and cannot meet the welding clamping and fixing requirements of other commonly used PE electrofusion pipe fittings such as elbows, tees and end caps.

[0006] This utility model embodiment provides a lightweight PE pipe electrofusion welding fixture, including: The mounting section includes a first mounting base and a second mounting base that is mounted via a sliding groove provided on the side of the first mounting base. Both the first mounting base and the second mounting base are provided with mounting guide rails. The clamp body includes a first clamping part and a second clamping part, one end of the first clamping part and the second clamping part are hinged together, and the other end is detachably connected. The fixture body is also provided with mounting holes that are evenly distributed at an angle. Each mounting hole can be provided with a clamping block. There are at least two clamping blocks. The clamping blocks can be installed on the fixture body through the mounting holes. After a number of clamping blocks are installed on the fixture body, a clamping space is formed between the clamping blocks.

[0007] Preferably, the first mounting base is provided with at least one pair of spaced-apart mounting rails.

[0008] Preferably, the fixture body base is provided with a slider structure adapted to the mounting guide rail, and the fixture body can slide along the length direction of the mounting guide rail based on the slider structure, thereby adjusting the position of the fixture body on the first mounting base.

[0009] Preferably, the number and position of the slider structures are adapted to the number and position of the mounting guide rails on the first mounting base.

[0010] Preferably, the slider structure is provided with screw holes for mounting and fixing bolts, and the slider structure can be fixed on the mounting guide rail by tightening the fixing bolts.

[0011] Preferably, one end of the first clamping part is provided with a "U"-shaped fixing groove, and one end of the second clamping part is hinged to a fixing rod, and the fixing rod is also provided with a fastening block; The fixing rod and the fastening block are threaded together; The fixing rod is hinged to the fixing groove and can be fixed in relative position to the first clamping part and the second clamping part by tightening the fastening block.

[0012] Preferably, the inner sides of the first clamping part and the second clamping part are provided with a communicating annular mounting groove; The mounting hole communicates with the mounting groove, and the clamping block is placed in the mounting groove by mounting bolts and the mounting hole.

[0013] Preferably, the clamping block includes a protrusion adapted to the mounting groove and an extension integrally formed with the protrusion. The protrusion is provided with a threaded hole for mounting with the mounting bolt, and the extension is arc-shaped at the end away from the protrusion. After the arc-shaped ends of the clamping blocks are installed on the first clamping part and the second clamping part, they form a clamping space.

[0014] Preferably, the clamping block includes a first type of clamping block, a second type of clamping block, a third type of clamping block, and a fourth type of clamping block; The first clamping part, the second type of clamping block, the third type of clamping block and the fourth type of clamping block have different clamping spaces after being installed on the fixture body; The clamping space dimensions of the first type of clamping block, the second type of clamping block, the third type of clamping block, and the fourth type of clamping block are set to increase or decrease in sequence.

[0015] Preferably, the fixture body is installed in the same way on the first mounting base and the second mounting base.

[0016] The lightweight PE pipe electrofusion welding fixture provided by this utility model has the following beneficial effects: This invention overcomes the limitation of existing clamps that can only be used for sleeve welding. By movably connecting the clamp bodies, which are respectively set at different positions on the mounting base, a single machine can be used for multiple purposes. By combining the clamp bodies at different positions, it can meet the welding clamping requirements of various commonly used PE electrofusion pipe fittings such as sleeves, elbows, and tees. There is no need to carry multiple sets of special clamps, which saves storage space for emergency repair vehicles, reduces equipment carrying and management costs, and avoids work interruptions caused by temporarily returning to retrieve special clamps during emergency repairs. It effectively shortens the gas and water outage time, ensures the reliability of pipeline supply, significantly improves on-site work efficiency, and reduces the labor intensity of construction personnel. It is applicable to PE pipe installation and emergency repair scenarios in multiple fields such as gas and water supply, and has broad practical value and promotion significance. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments of this utility model will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, and these are all within the protection scope of this utility model.

[0018] Figure 1 This is a structural schematic diagram of a lightweight PE pipe electrofusion welding fixture; Figure 2 This is a structural schematic diagram of the fixture body; Figure 3 This is a schematic diagram of the clamping block structure; Figure 4 These are schematic diagrams of structures in some embodiments; Parts and component numbers in the diagram: 100 - First mounting base; 200-Clamp body, 210-Mounting guide rail, 220-Slider structure, 221-Fixing bolt, 230-First clamping part, 231-Fixing groove, 240-Second clamping part, 241-Fixing lever, 242-Fastening block, 243-Mounting groove, 245-Mounting hole, 260-Clamping block, 261-Protrusion, 262-Extension, 263-Clamping space, 264-First type clamping block, 265-Second type clamping block, 266-Third type clamping block, 267-Fourth type clamping block; 300 - Second mounting base. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. It should be noted that, in this document, relational terms such as "first" and "second" are merely used to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. In the description of this utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. Unless otherwise specified, embodiments of the present invention and the various features thereof can be combined with each other, all within the protection scope of the present invention. Example

[0020] Please see Figure 1This utility model provides a lightweight PE pipe electrofusion welding clamp, addressing the urgent need for operational efficiency and reliable gas / water supply in municipal industries such as gas and water supply during emergency repairs and routine installations of PE pipes. Taking gas pipeline repair as an example, when buried PE pipes leak due to corrosion or external force damage, the damaged section needs to be cut off immediately, and the remaining section connected using electrofusion fittings (which may be sleeves, elbows, or tees, depending on the location of the damage and the pipe routing) to restore gas supply. However, existing clamps can only clamp sleeves. If elbows or tees are needed to repair the damaged area, repair personnel either have to carry multiple sets of specialized clamps in advance on limited repair vehicles or temporarily return to the warehouse to retrieve them.

[0021] Furthermore, in routine PE pipe installation, sleeves, elbows, and tees may be used interchangeably in different sections, and frequent replacement of specialized clamps can reduce construction efficiency. It is precisely because of these practical pain points—fear of delays in emergency repairs and the fear of frequent clamp replacements in routine installations—that the development of this utility model was driven by the core need to solve the problem of one clamp being compatible with multiple pipe fittings.

[0022] Please see Figure 1 and Figure 4 In this embodiment, the welding fixture includes a mounting part, which includes a first mounting base 100 and a second mounting base 300 for mounting via a sliding groove provided on the side of the first mounting base 100. Both the first mounting base 100 and the second mounting base 300 are provided with mounting guide rails 210. The fixture body 200 includes a first clamping part 230 and a second clamping part 240. One end of the first clamping part 230 and the second clamping part 240 are hinged, and the other end is detachably connected. The fixture body 200 is also provided with mounting holes 245 evenly distributed at an angle. Each mounting hole 245 can be provided with a clamping block 260. At least two clamping blocks 260 are provided, and the clamping blocks 260 can be mounted on the fixture body 200 through the mounting holes 245. After a plurality of clamping blocks 260 are mounted on the fixture body 200, a clamping space 263 is formed between the plurality of clamping blocks 260.

[0023] In actual operation, when welding sleeve-type components, only the first mounting base 100 needs to be used, and the second mounting base 300 does not need to be installed. This ensures that the first mounting base 100 is placed on a stable working surface, and the base's own fixing parts prevent the base from shifting during the welding process. On the mounting guide rail 210 of the first mounting base 100, select a suitable installation position according to the length and diameter of the sleeve, install only one clamp body 200, and align the bottom of the clamp body 200 with the mounting guide rail 210. Fix the position of the clamp body 200 by the positioning hole or locking knob on the guide rail. Then install at least two clamping blocks 260 (usually three, but two can also complete the clamping task) on the clamp body 200. Place the PE pipe sleeve into the clamping space 263 formed by the clamping blocks 260, and then clamp the PE pipe firmly by the hinge of the first clamping part 230 and the second clamping part 240, so that the clamping blocks 260 fit tightly against the outer wall of the sleeve. Then close the detachable end of the clamp body 200 and lock it to ensure that there is no relative sliding between the sleeve and the PE pipe. Then the welding equipment can be started for electrofusion welding.

[0024] There are two ways to use the welded elbow. The first is a single-base, double-clamp installation, suitable for short-distance elbow welding; only the first mounting base 100 is used, without the need for the second mounting base 300. Place the first mounting base 100 on a stable working surface, using its built-in fixings to prevent displacement, and ensure the mounting guide rail 210 on the base is horizontal. Based on the distance between the pipe sections at both ends of the elbow, select two appropriately spaced installation positions on the mounting guide rail 210 of the first mounting base 100, and install two independent clamp bodies 200 on each. For each clamp body 200, first align its bottom with the mounting guide rail 210, and then fix its position using the positioning holes or locking knobs on the guide rail, ensuring that the axes of the two clamp bodies 200 are perfectly aligned with the axes of the pipe sections at both ends of the elbow. For each clamp body 200, install at least two clamping blocks 260 (usually three). Adjust the position of the clamping blocks 260 through the evenly distributed angled mounting holes 245 on the clamp body 200 so that the clamping blocks 260 form a clamping space 263 that matches the pipe diameter at the end of the elbow. Open the detachable ends of the two clamp bodies 200, insert one end of the elbow into the corresponding PE pipe, and place it into the clamping space 263 of the first clamp body 200. Close the hinge structure between the first clamping part 230 and the second clamping part 240 so that the clamping block 260 fits tightly against the outer wall of the elbow. Following the same steps, insert the other end of the elbow into another PE pipe and place it into the clamping space 263 of the second clamp body 200. Clamp it with the hinge structure to ensure that there is no gap between the clamping block 260 and the outer wall of the elbow. Finally, close and lock the detachable ends of the two clamp bodies 200. Check and confirm that there is no relative sliding between the pipe sections at both ends of the elbow and the PE pipe. Then, start the welding equipment for electrofusion welding.

[0025] Furthermore, it also includes a double-base vertical installation suitable for welding long-distance / large-diameter elbows; first, the first mounting base 100 is placed on a stable working surface and fixed with its own fasteners to prevent displacement; the second mounting base 300 is installed through the sliding groove on the side of the first mounting base 100, the angle of the second mounting base 300 is adjusted so that it is perpendicular to the first mounting base 100, and then reinforced with the built-in fasteners of the second mounting base 300 to ensure the overall stability of the double bases. On the mounting guide rail 210 of the first mounting base 100, a clamp body 200 is installed at a suitable position and fixed with positioning holes or locking knobs; on the mounting guide rail 210 of the second mounting base 300, corresponding to the position of the pipe section at the other end of the elbow, another clamp body 200 is installed and fixed with positioning holes or locking knobs, ensuring that the axes of the two clamp bodies 200 are aligned with the axes of the pipe sections at both ends of the elbow and that the heights are consistent to avoid uneven stress on the elbow. Each fixture body 200 is equipped with at least two clamping blocks 260. The size of the clamping space 263 is adjusted through the mounting hole 245 to match the pipe diameter at the end of the elbow. One end of the elbow is inserted into a PE pipe and placed into the clamping space 263 of the fixture body 200 of the first mounting base 100. The clamping blocks 260 are clamped together by the hinge structure so that they fit against the outer wall of the elbow. The other end of the elbow is inserted into another PE pipe and placed into the clamping space 263 of the fixture body 200 of the second mounting base 300. The clamping operation is repeated. After locking the detachable ends of the two fixture bodies 200 and confirming that the elbow is not offset or slipped, the welding equipment can be started for welding operations.

[0026] Furthermore, the tee has a main pipe and branch pipe structure, requiring clamping at three points: both ends of the main pipe and the branch pipe. Each clamping point is equipped with at least two clamping blocks 260. The first mounting base 100 serves as the clamping base in the direction of the main pipe and is placed on a stable working surface. It is fixed by its own fasteners to ensure that the mounting guide rail 210 is along the axis of the main pipe. The second mounting base 300 is installed through the sliding groove on the side of the first mounting base 100. The angle is adjusted (usually 90° to the first mounting base 100 to fit a straight tee; special angle tee can be adjusted according to actual needs) so that the guide rail of the second mounting base 300 is along the axis of the branch pipe. It is then reinforced by the fasteners of the second mounting base 300 to ensure the stability of the double base position.

[0027] Please see Figure 1 and Figure 4On the mounting guide rail 210 of the first mounting base 100, two appropriately spaced positions are selected according to the length of the tee main pipe, and two clamp bodies 200 are installed respectively. Each clamp body 200 is fixed by a positioning hole or a locking knob to ensure that the axes of the two clamp bodies 200 are coaxial and aligned with the axis of the main pipe. On the mounting guide rail 210 of the second mounting base 300, a clamp body 200 is installed at the position corresponding to the tee branch pipe and fixed by a positioning hole or a locking knob to ensure that its axis is aligned with the axis of the branch pipe and forms a preset branch angle with the two clamp bodies 200 in the direction of the main pipe. At least two clamping blocks 260 are installed on each of the three clamping bodies 200. The clamping space 263 is adjusted through the mounting hole 245 to match the pipe diameters of the main pipe and branch pipes respectively. The two ends of the tee main pipe are respectively inserted into two PE pipes and placed into the two clamping bodies 200 of the first mounting base 100. The hinge structure is closed so that the clamping blocks 260 fit tightly against the outer wall of the main pipe, and then the detachable end is locked. The tee branch pipe is inserted into the third PE pipe and placed into the clamping body 200 of the second mounting base 300. The clamping and locking operations are repeated. After confirming that the main pipe and branch pipe of the tee are not offset or relatively slipped, and that each clamping block 260 fits tightly against the outer wall of the pipe fitting, the welding equipment can be started for electrofusion welding.

[0028] In this embodiment, the PE pipe welding clamp, through its modular mounting base combination and adjustable clamping structure, breaks through the limitation of existing clamps that clamp one pipe fitting at a time, achieving precise clamping of commonly used PE electrofusion pipe fittings such as sleeves, elbows, and tees. In emergency repair scenarios, there is no need to carry multiple sets of dedicated clamps; simply by adjusting the combination of the first mounting base 100, the second mounting base 300, and the corresponding clamp body 200, different pipe fittings can be quickly adapted, avoiding delays in repair time due to returning to retrieve clamps and reducing the risks of gas leaks and water supply interruptions. In daily installation scenarios, there is no need to frequently disassemble and replace clamps; one set of equipment can meet the welding needs of pipe fittings in different road sections, reducing operation steps, effectively improving construction efficiency, and avoiding the impact of repeated clamp adjustments on installation accuracy.

[0029] Further, please see Figure 1The first mounting base 100 is provided with at least one pair of spaced-apart mounting guide rails 210. The mounting guide rails 210 provide a stable and adjustable mounting base for the clamp body 200. The spaced design of the mounting guide rails 210 allows the clamp body 200 to flexibly adjust its mounting position on the first mounting base 100 according to the size and shape requirements of different pipe fittings, thereby better adapting to various specifications of PE electrofusion pipe fittings and ensuring stability and accuracy during clamping. Simultaneously, the spaced mounting guide rails 210 also enhance the structural strength of the mounting base, preventing deformation of the mounting base due to uneven force during clamping, thus ensuring the reliability and durability of the entire welding clamp during use.

[0030] Further, please see Figure 2 The base of the clamp body 200 is provided with a slider structure 220 adapted to the mounting guide rail 210. The clamp body 200 can slide along the length direction of the mounting guide rail 210 based on the slider structure 220, thereby adjusting the position of the clamp body 200 on the first mounting base 100.

[0031] Furthermore, the number and position of the slider structures 220 are adapted to the number and position of the mounting guide rails 210 on the first mounting base 100.

[0032] Further, please see Figure 1 The slider structure 220 is provided with screw holes for mounting fixing bolts 221. The slider structure 220 can be fixed on the mounting guide rail 210 by tightening the fixing bolts 221. This design prevents the fixture body 200 from shifting position due to external forces or vibrations during pipe welding, ensuring that the pipe maintains a precise alignment during welding, avoiding welding deviations caused by positional movement, and thus guaranteeing the stability and consistency of welding quality.

[0033] Meanwhile, this bolt-fastening method is convenient to operate. The slider structure 220 can be fixed and loosened with the help of simple tools. This allows operators to quickly adjust the position of the clamp body 200 according to the actual pipe specifications and then fix it reliably, improving the flexibility and efficiency of the welding clamp.

[0034] Further, please see Figure 2The first clamping part 230 has a U-shaped fixing groove 231 at one end, and the second clamping part 240 has a fixing rod 241 hinged to one end. The fixing rod 241 is also provided with a fastening block 242. The fixing rod 241 and the fastening block 242 are threaded together. After the fixing rod 241 is hinged to the second clamping part 240 in the fixing groove 231, the relative position of the first clamping part 230 and the second clamping part 240 can be fixed by tightening the fastening block 242.

[0035] Specifically, the "U"-shaped fixing groove 231 of the first clamping part 230 cooperates with the hinged fixing rod 241 of the second clamping part 240 to form a dual fixing structure of groove positioning and mechanical locking, which can effectively prevent the relative displacement of the first clamping part 230 and the second clamping part 240 during the clamping process. The groove shape of the "U"-shaped fixing groove 231 can accurately accommodate the fixing rod 241, providing a clear positioning reference for the connection between the two and preventing the rod from deviating from the preset position when subjected to force; while the threaded connection design between the fixing rod 241 and the fastening block 242 can generate a continuous and adjustable locking force by tightening the fastening block 242, so that the first clamping part 230 and the second clamping part 240 fit tightly together, thereby driving the clamping block 260 to firmly press the outer wall of the pipe. This structure avoids loosening of the clamping due to factors such as vibration and thermal expansion of the pipe during the welding process, ensuring that the pipe and PE pipe always remain coaxial or at a preset angle, fundamentally guaranteeing the sealing and precision of the welding joint, and reducing leakage problems caused by unstable clamping later. Furthermore, this fixing structure also offers the advantages of rapid positioning and flexible adjustment at the operational level, significantly reducing the operational difficulty for construction personnel. The fixing rod 241 and the second clamping part 240 adopt a hinged design. When opening the clamping part, the rod can be directly rotated out of the "U"-shaped fixing groove 231. When closing, the rod only needs to be rotated into the groove to complete the initial positioning, without complicated alignment steps, which is especially suitable for time-sensitive scenarios such as emergency repairs. In addition, the threaded fastening block 242 allows for flexible adjustment of the locking force according to the pipe diameter and material hardness. When dealing with thicker or harder pipes, the fastening block 242 can be tightened appropriately to enhance the clamping force. When dealing with thinner or softer pipes, the force can be controlled to avoid damaging the pipes. It not only meets the clamping needs of different pipes such as sleeves, elbows, and tees, but also reduces operation time and further improves overall work efficiency.

[0036] Further, please see Figure 2 The inner sides of the first clamping part 230 and the second clamping part 240 are provided with annular mounting grooves 243 that communicate with each other; the mounting hole 245 communicates with the mounting groove 243, and the clamping block 260 is disposed in the mounting groove 243 by mounting bolts and mounting hole 245.

[0037] Furthermore, the clamping block 260 includes a protrusion 261 adapted to the mounting groove 243, and an extension 262 integrally formed with the protrusion 261. The protrusion 261 is provided with a threaded hole for mounting with the mounting bolt, and the extension 262 is arc-shaped at the end away from the protrusion 261. After the arc-shaped ends of several clamping blocks 260 are installed on the first clamping part 230 and the second clamping part 240, they form a clamping space 263.

[0038] The annular mounting groove 243 connecting the inner sides of the first clamping part 230 and the second clamping part 240 provides an embedded mounting base for the clamping block 260. Combined with the mounting hole 245 communicating with the mounting groove 243 and the mounting bolt, a stable fixing structure is formed. The groove shape of the annular mounting groove 243 is adapted to the bottom of the clamping block 260, which can limit the radial displacement of the clamping block 260 after installation and prevent the clamping block 260 from shifting due to vibration during welding. Simultaneously, the design of the connection between the mounting hole 245 and the mounting groove 243 allows the mounting bolt to directly pass through the mounting hole 245 and connect to the clamping block 260. The axial locking force of the bolt firmly fixes the clamping block 260 within the mounting groove 243, ensuring a tight fit between the clamping block 260 and the inner side of the clamping part without any loosening gaps. This structure allows the clamping block 260 to maintain a preset angle and position when clamping the pipe fitting, thereby ensuring that the outer wall of the clamping block 260 accurately fits the surface of the pipe fitting, reducing uneven force on the pipe fitting caused by the offset of the clamping block 260, ensuring the coaxiality or angular accuracy of the pipe fitting during welding, and improving the welding quality of the interface. Specifically, the cooperation between the annular mounting groove 243, the mounting hole 245, and the mounting bolts provides convenient conditions for adjusting and replacing the position of the clamping block 260, greatly improving the adaptability of the clamp to pipe fittings of different specifications. On the one hand, the annular mounting groove 243 has a connected annular structure, and the mounting holes 245 are evenly distributed along the annulus. The clamping block 260 can be fixed by selecting different positions of the mounting holes 245, realizing angle adjustment along the annular direction, and meeting the clamping requirements of pipe fittings of different diameters or special shapes. On the other hand, the detachable design of the mounting bolts makes the replacement operation of the clamping block 260 simpler.

[0039] When it is necessary to adapt to pipe fittings with larger or smaller diameters, simply unscrew the mounting bolts, remove the original clamping block 260 and replace it with a clamping block 260 of the corresponding size, and then re-fix it to the bolts through the mounting hole 245. There is no need to disassemble the entire clamping part. This flexible adjustment and convenient replacement feature means that a set of clamps can adapt to various specifications of PE electrofusion pipe fittings without the need to replace the clamping part. It is only necessary to adjust the position of the clamping block 260 or replace the clamping block 260, which further reduces the equipment operating cost and improves the construction adaptation efficiency.

[0040] Further, please see Figure 3 The clamping block 260 includes a first type of clamping block 264, a second type of clamping block 265, a third type of clamping block 266, and a fourth type of clamping block 267. After being installed on the clamping body 200, the first clamping part 230, the second type of clamping block 265, the third type of clamping block 266, and the fourth type of clamping block 267 each have clamping spaces 263 of different sizes. The clamping spaces 263 of the first type of clamping block 264, the second type of clamping block 265, the third type of clamping block 266, and the fourth type of clamping block 267 are arranged in an increasing or decreasing order. Specifically, the first type of clamping block 264 to the fourth type of clamping block 267, through their different sized structural designs, combined with the annular mounting groove 243 and evenly distributed mounting holes 245 of the clamping body 200, achieve precise clamping of PE pipes of different diameters and corresponding fittings. Because PE pipes come in various specifications (such as DE40, DE63, DE110, DE160, etc.) in municipal gas and water supply projects, and the outer wall dimensions of different specifications of pipe fittings vary significantly, a single-size clamping block 260 cannot meet the needs of all scenarios. The four types of clamping blocks 260 correspond to different sizes of clamping spaces 263. For example, the first type of clamping block 264 is suitable for small-diameter pipe fittings (such as DN20-DN32), and the fourth type of clamping block 267 is suitable for large-diameter pipe fittings (such as DN90-DN160). Construction personnel can directly select the corresponding type of clamping block 260 according to the actual specifications of the pipe fitting to be welded, and fix it in the installation groove 243 with mounting bolts. This categorized and adaptable design ensures that each type of clamping block 260 fits tightly against the outer wall of the pipe fitting, avoiding loosening or damage to the pipe fitting due to size mismatch. This further expands the applicability of the clamps, covering all scenarios from daily installation of small-diameter branch pipes to emergency repairs of large main pipes.

[0041] The modular design of the four types of clamping blocks 260, combined with the universal installation structure of the clamp body 200, significantly simplifies the operation process and reduces operating costs. Firstly, all types of clamping blocks 260 are connected via standardized mounting bolts and mounting holes 245, eliminating the need for specialized installation structures for different sizes. Construction personnel do not need to learn differentiated operations; they simply select the corresponding clamping block 260 based on the pipe fitting specifications, unscrew the old bolts, and replace it with a new one. This operational efficiency is far higher than replacing an entire set of dedicated clamps. Secondly, for construction companies, there is no need to purchase multiple sets of dedicated clamps for different pipe fitting specifications. Only one basic clamp body 200 and four types of clamping blocks 260 are needed to meet various welding requirements, significantly reducing equipment procurement costs and storage space requirements. Furthermore, when a type of clamping block 260 wears out, only that type needs to be replaced, without scrapping the entire clamp set, further reducing subsequent maintenance costs.

[0042] Furthermore, the fixture body 200 is installed in the same way on the first mounting base 100 and the second mounting base 300.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A lightweight PE pipe electrofusion welding fixture, characterized in that, include: The mounting section includes a first mounting base (100) and a second mounting base (300) for mounting via a slide groove provided on the side of the first mounting base (100). Both the first mounting base (100) and the second mounting base (300) are provided with mounting guide rails (210). The clamping part includes a clamp body (200) that is detachably mounted on the mounting part via the mounting guide rail (210). The clamp body (200) includes a first clamping part (230) and a second clamping part (240), one end of the first clamping part (230) and the second clamping part (240) are hinged together, and the other end is detachably connected; The fixture body (200) is also provided with mounting holes (245) evenly distributed at an angle. Each mounting hole (245) can be provided with a clamping block (260). There are at least two clamping blocks (260), and the clamping blocks (260) can be installed on the fixture body (200) through the mounting holes (245). After a number of clamping blocks (260) are installed on the fixture body (200), a clamping space (263) is formed between the clamping blocks (260).

2. The lightweight PE pipe electrofusion welding fixture according to claim 1, characterized in that, The first mounting base (100) is provided with at least one pair of mounting guide rails (210) arranged at intervals.

3. The lightweight PE pipe electrofusion welding fixture according to claim 1, characterized in that, The base of the clamp body (200) is provided with a slider structure (220) adapted to the mounting guide rail (210). The clamp body (200) can slide along the length direction of the mounting guide rail (210) based on the slider structure (220), thereby adjusting the position of the clamp body (200) on the first mounting base (100).

4. A lightweight PE pipe electrofusion welding fixture according to claim 3, characterized in that, The number and position of the slider structure (220) are adapted to the number and position of the mounting guide rails (210) on the first mounting base (100).

5. A lightweight PE pipe electrofusion welding fixture according to claim 3, characterized in that, The slider structure (220) is provided with screw holes for mounting fixing bolts (221). The slider structure (220) can be fixed on the mounting guide rail (210) by tightening the fixing bolts (221).

6. A lightweight PE pipe electrofusion welding fixture according to claim 1, characterized in that, The first clamping part (230) has a "U"-shaped fixing groove (231) at one end, and the second clamping part (240) has a fixing rod (241) hinged at one end, and a fastening block (242) is also provided on the fixing rod (241). The fixing rod (241) and the fastening block (242) are threaded together; After the fixing rod (241) is hinged to the fixing groove (231) with the second clamping part (240), the relative positions of the first clamping part (230) and the second clamping part (240) can be fixed by tightening the fastening block (242).

7. A lightweight PE pipe electrofusion welding fixture according to claim 6, characterized in that, The inner sides of the first clamping part (230) and the second clamping part (240) are provided with a communicating annular mounting groove (243). The mounting hole (245) communicates with the mounting groove (243), and the clamping block (260) is set in the mounting groove (243) by mounting bolts and mounting hole (245).

8. A lightweight PE pipe electrofusion welding fixture according to claim 7, characterized in that, The clamping block (260) includes a protrusion (261) adapted to the mounting groove (243) and an extension (262) integrally formed with the protrusion (261). The protrusion (261) is provided with a threaded hole for mounting with the mounting bolt. The extension (262) is arc-shaped at the end away from the protrusion (261). After the arc-shaped ends of several clamping blocks (260) are installed on the first clamping part (230) and the second clamping part (240), they form a clamping space (263).

9. A lightweight PE pipe electrofusion welding fixture according to claim 1, characterized in that, The clamping block (260) includes a first type of clamping block (264), a second type of clamping block (265), a third type of clamping block (266), and a fourth type of clamping block (267). The first type of clamping block (264), the second type of clamping block (265), the third type of clamping block (266) and the fourth type of clamping block (267) have different clamping spaces (263) after being installed on the clamping body (200); The clamping space (263) dimensions of the first type of clamping block (264), the second type of clamping block (265), the third type of clamping block (266), and the fourth type of clamping block (267) are set to increase or decrease sequentially.

10. A lightweight PE pipe electrofusion welding fixture according to claim 1, characterized in that, The fixture body (200) is installed on the first mounting base (100) and the second mounting base (300) in the same way.

Images