Clamping pipe buckle for HDPE pipe butt joint frame

Abstract

This utility model relates to a clamping pipe clamp for HDPE pipe connection brackets, belonging to the field of pipe connection technology. It includes a lower arc-shaped clamp and an upper arc-shaped clamp, which interlock to form a ring-shaped pipe clamp and are installed on the connection bracket. Four sets of positioning components are equidistantly arranged on the inner side of the ring-shaped pipe clamp to support and position the pipe end. The four sets of positioning components are respectively arranged in pairs on the lower and upper arc-shaped clamps. Each positioning component includes a fixing plate and multiple U-shaped seats. This utility model, by setting four sets of positioning components on the inner side of the ring-shaped pipe clamp, can effectively support and position the pipe end. Furthermore, construction personnel can flexibly adjust the height of the corresponding fixing plate and pulley according to the actual diameter of the pipe using an adjusting component, thereby changing the actual clamping size of the four sets of positioning components to meet the needs of different pipe diameters. Compared with traditional clamp fixing methods, it eliminates the need for frequent clamp removal, saves time and effort during adjustment, and avoids the problem of clamp loss.

Description

Technical Field

[0001] This utility model relates to the field of pipe connection technology, and in particular to a clamping pipe clamp for HDPE pipe connection bracket. Background Technology

[0002] HDPE pipes are widely used in water supply and drainage projects, gas transmission, agricultural irrigation and other fields due to their advantages such as corrosion resistance, wear resistance, good flexibility and long service life.

[0003] During HDPE pipe installation, heat fusion is typically used to connect two HDPE pipe sections. This process usually requires workers to first install or remove clamps according to the pipe diameter to be connected. Next, the workers install the two HDPE pipe sections on the left and right sides of a connecting frame, milling the pipe ends to ensure they are flat and precisely aligned. Finally, with the aid of the connecting frame, the two pipe sections are securely connected using heat fusion technology.

[0004] However, in actual construction, workers need to frequently disassemble and install the clamps according to the pipe diameter. This process is not only tedious and time-consuming, but frequent disassembly also causes the clamping structure between the clamps to gradually fail, resulting in loosening or even loss of the clamps. Secondly, during alignment, because the pipe ends are locked with pipe clamps, the pipe cannot be rotated for adjustment, making the alignment work even more difficult and inconvenient. Summary of the Invention

[0005] To solve the above-mentioned technical problems, this utility model provides a clamping pipe clip for HDPE pipe connection brackets. The technical solution of this utility model is as follows: A clamping pipe buckle for an HDPE pipe docking frame includes a lower arc-shaped clamp and an upper arc-shaped clamp. The lower arc-shaped clamp and the upper arc-shaped clamp interlock to form an annular pipe buckle and are installed on the docking frame. The inner side of the annular pipe buckle is provided with four sets of positioning components for supporting and positioning the pipe end. The four sets of positioning components are respectively arranged in pairs on the lower arc-shaped clamp and the upper arc-shaped clamp. The positioning component includes a fixed plate and multiple sets of U-shaped seats. The multiple sets of U-shaped seats are fixedly connected to the upper surface of the fixed plate. A pulley is rotatably connected to the inner side of the opening of the U-shaped seat. An adjusting component for adjusting its height is connected to the lower surface of the fixed plate. The adjusting component is installed on the lower arc-shaped clamp or the upper arc-shaped clamp. Both the lower and upper arc-shaped clamps are provided with limiting components at their middle positions to restrict the rotation of the pipe. The limiting components include elastic limiting elements, and the lower end of the elastic limiting elements is connected to an adjusting element two for adjusting its height. The adjusting element two is installed on the lower or upper arc-shaped clamp.

[0006] Optionally, a shaft is fixedly passed through the center of the pulley, the shaft is rotatably connected to the upper opening of the U-shaped seat, and a fixing nut for limiting the rotation of the shaft is threaded onto one end of the shaft.

[0007] Optionally, multiple sets of rubber rings are fixedly fitted on the outer side of the pulley.

[0008] Optionally, threaded holes are provided through the middle positions of the upper and lower arc-shaped clamps, and the positions of the threaded holes correspond one-to-one with the positions of the limiting components. Movable holes are provided on both sides of the threaded holes, and the positions of the movable holes correspond one-to-one with the positions of the first adjusting component. The first adjusting component includes a U-shaped frame, a threaded adjusting rod, and a movable sleeve. The U-shaped frame is fixedly connected to the outer side of the upper or lower arc-shaped clamp. A through hole is provided through the middle position of the transverse side of the U-shaped frame. The first threaded adjusting rod is rotatably connected inside the through hole. The movable sleeve is fixedly connected to the lower surface of the fixed plate. The movable sleeve is threaded onto the outer side of the first threaded adjusting rod. The movable sleeve is slidably connected inside the movable hole at the corresponding position.

[0009] Optionally, guide grooves are symmetrically provided on both sides of the inner side of the movable hole, and guide ribs that slide in cooperation with the guide grooves are symmetrically fixed on both sides of the outer side of the movable sleeve.

[0010] Optionally, a limiting seat is slidably connected to the inner side of the U-shaped frame. A central hole is formed through the middle of the surface of the limiting seat. Sliding grooves are formed through the left and right sides of the surface of the limiting seat. The threaded adjusting rod is slidably connected inside the central hole. The two sides of the U-shaped frame are slidably connected to two sets of sliding grooves respectively. Locking bolts for fixing the position are threadedly connected to both sides of the limiting seat. Long grooves are formed on the outer sides of both sides of the U-shaped frame. The ends of the locking bolts abut against the long grooves. Scale lines for indicating the position of the limiting seat are provided on the outer sides of both sides of the U-shaped frame.

[0011] Optionally, the outer thread of the threaded adjusting rod is provided with two sets of limiting nuts, and the two sets of limiting nuts respectively abut against the upper and lower surfaces of the transverse side of the U-shaped frame.

[0012] Optionally, the elastic limiting component includes a U-shaped frame and a limiting block. Inserts are fixedly connected to both the front and rear sides of the lower surface of the limiting block. Slots are opened on the upper surfaces of both sides of the U-shaped frame. The inserts are slidably connected to the slots on the corresponding sides. Multiple sets of outer cylinders are fixedly connected to the upper surface of the transverse side of the U-shaped frame. Multiple sets of inner cylinders are fixedly connected to the lower surface of the limiting block. The inner cylinders are slidably connected to the upper inner end of the outer cylinders. Springs are installed inside the outer cylinders and the inner cylinders.

[0013] Optionally, the upper and lower arc-shaped clamps are provided with limit holes at their midpoints and on both the front and rear sides of the threaded hole. The second adjusting component includes a second threaded adjusting rod, which is threadedly connected to the inside of the threaded hole. The upper end of the second threaded adjusting rod is rotatably connected to the lower surface of the U-shaped frame. Limit rods are fixedly connected to both the front and rear sides of the lower surface of the U-shaped frame, and the limit rods are slidably connected in the limit holes on the corresponding sides.

[0014] All of the above optional technical solutions can be combined arbitrarily, and this utility model does not provide a detailed description of the structure after each combination.

[0015] The beneficial effects of this utility model through the above solution are as follows: This invention effectively supports and positions the pipe end by setting four sets of positioning components inside the annular pipe clamp. Furthermore, construction personnel can flexibly adjust the height of the corresponding fixing plate and pulley using an adjusting device according to the actual pipe diameter, thereby changing the actual clamping size of the four sets of positioning components to meet the needs of different pipe diameters. Compared with traditional clamp fixing methods, it eliminates the need for frequent clamp removal, saves time and effort during adjustment, and avoids the problem of clamp loss.

[0016] Secondly, the positioning component uses pulleys that contact the outer wall of the pipe. This allows the pipe to be rotated and adjusted for alignment purposes, making alignment easier. After alignment, a limiting component can be used to restrict the pipe's rotation, ensuring it maintains its predetermined position during subsequent heat fusion connections.

[0017] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0018] Figure 1 A schematic diagram of the overall appearance structure of the clamping pipe buckle for the HDPE pipe docking bracket provided by this utility model and its cooperation with the docking bracket; Figure 2 This is a front view of the clamping pipe clip for the HDPE pipe connection bracket provided by this utility model; Figure 3 An exploded structural diagram of the clamping pipe fastener for the HDPE pipe connection bracket provided by this utility model; Figure 4 This is a schematic diagram of the structure of the lower arc-shaped frame, positioning component, and limiting component in this utility model. Figure 5 This is an exploded view of the positioning component in this utility model. Figure 1 ; Figure 6 This is an exploded view of the positioning component in this utility model. Figure 2 ; Figure 7 This is an exploded view of the limiting component in this utility model.

[0019] The diagram labels are as follows: 1. Connecting frame; 2. Lower arc-shaped clamp; 3. Upper arc-shaped clamp; 31. Threaded hole; 311. Limiting hole; 32. Movable hole; 321. Guide groove; 4. Positioning assembly; 41. Fixing plate; 42. U-shaped seat; 43. Pulley; 431. Shaft; 432. Fixing nut; 433. Rubber ring; 44. Adjusting component one; 441. U-shaped frame; 4411. Through hole; 4412. Long groove; 4413. Scale line; 442. Threaded adjusting rod one; 443. Movable sleeve; 4431. Guide rib; 444. Limiting seat; 4441. Center hole; 4442. Slide groove; 4443. Locking bolt; 445. Limiting nut; 5. Limiting assembly; 51. Elastic limiting component; 511. U-shaped frame; 5111. Slot; 512. Limiting block; 513. Insert block; 514. Outer cylinder; 515. Inner cylinder; 516. Spring; 52. Adjusting component two; 521. Threaded adjusting rod two; 522. Limiting rod. Detailed Implementation

[0020] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0021] Please see Figure 1-7 This utility model provides a clamping pipe buckle for HDPE pipe docking frame, including a lower arc-shaped clamp 2 and an upper arc-shaped clamp 3. The lower arc-shaped clamp 2 and the upper arc-shaped clamp 3 are interlocked to form an annular pipe buckle and installed on the docking frame 1. The inner side of the annular pipe buckle is provided with four sets of positioning components 4 for supporting and positioning the end of the pipe. The four sets of positioning components 4 are respectively arranged in pairs on the lower arc-shaped clamp 2 and the upper arc-shaped clamp 3. The positioning component 4 includes a fixed plate 41 and multiple sets of U-shaped seats 42. The multiple sets of U-shaped seats 42 are fixedly connected to the upper surface of the fixed plate 41. A pulley 43 is rotatably connected to the inner side of the opening of the U-shaped seat 42. An adjusting component 44 for adjusting its height is connected to the lower surface of the fixed plate 41. The adjusting component 44 is installed on the lower arc-shaped clamp 2 or the upper arc-shaped clamp 3. Both the lower arc-shaped clamp 2 and the upper arc-shaped clamp 3 are provided with a limiting component 5 to restrict the rotation of the pipe. The limiting component 5 includes an elastic limiting member 51. The lower end of the elastic limiting member 51 is connected to an adjusting member 2 52 for adjusting its height. The adjusting member 2 52 is installed on the lower arc-shaped clamp 2 or the upper arc-shaped clamp 3.

[0022] In this invention, when heat-fusion connecting two pipe sections, the height of the fixing plate 41 is first adjusted by adjusting component 44 according to the pipe dimensions to be connected. The fixing plate 41, via U-shaped seat 42, drives the pulley 43 to change position, thereby altering the clamping dimensions of the four positioning components 4, ensuring effective support and positioning of the pipe ends. Next, the two pipe sections are placed on the lower arc-shaped clamps 2 on the left and right sides of the connecting frame 1, and the upper arc-shaped clamp 3 is fastened above the lower arc-shaped clamp 2 and secured with bolts. At this point, the pipe is fixed by the annular pipe clamp. Then, under the action of the pulley 43, the pipe can rotate relative to the annular pipe clamp, assisting the construction personnel in adjusting the rotation of the pipe. After adjustment, the position of the elastic limiting component 51 is adjusted by adjusting component 52, causing it to abut against the outer wall of the pipe, thus limiting the rotation of the pipe. Finally, with the assistance of the connecting frame 1, the heat-fusion connection of the two pipe sections is completed.

[0023] Furthermore, a shaft 431 is fixedly passed through the center of the pulley 43. The shaft 431 is rotatably connected to the upper opening of the U-shaped seat 42. A fixing nut 432 for limiting the rotation of the shaft 431 is threaded onto one end of the shaft 431.

[0024] Specifically, construction workers can flexibly choose whether the pulley 43 and the U-shaped seat 42 are in a state of relative rotation or relative stillness, depending on the actual situation. When the construction does not require the pipe to rotate for alignment, the fixing nut 432 can be tightened so that it abuts against the outside of the U-shaped seat 42. At this time, the shaft 431 cannot rotate, making the pulley 43 locked. In this case, the four sets of pulleys 43 are firmly abutted against the outer wall of the pipe, and the pipe cannot rotate. Conversely, when the construction requires the pipe to rotate for alignment, the fixing nut 432 can be loosened. At this time, the shaft 431 can rotate relative to the U-shaped seat 42, and the pulleys 43 are in a state of free rotation. In this case, the four sets of pulleys 43 can provide rotational support for the pipe, ensuring that the pipe can be aligned and adjusted smoothly.

[0025] Furthermore, multiple sets of rubber rings 433 are fixedly sleeved on the outer side of the pulley 43.

[0026] Specifically, the multiple sets of rubber rings 433 on the outer side of the pulley 43 can increase the friction between the pulley 43 and the pipe. When the pulley 43 is locked, the pipe cannot rotate under the action of the rubber rings 433. When the pulley 43 is in a free-rotating state, the rotation of the pipe under the action of the rubber rings 433 can drive the pulley 43 to rotate, making the pipe rotation adjustment smoother and more convenient.

[0027] Furthermore, threaded holes 31 are provided through the middle positions of the upper arc-shaped clamp 3 and the lower arc-shaped clamp 2. The positions of the threaded holes 31 correspond one-to-one with the positions of the limiting components 5. Movable holes 32 are provided on both sides of the threaded holes 31. The positions of the movable holes 32 correspond one-to-one with the positions of the adjusting components 44. The adjusting components 44 include a U-shaped frame 441, a threaded adjusting rod 442, and a movable sleeve 443. The U-shaped frame 441 is fixedly connected to the outer side of the upper arc-shaped clamp 3 or the lower arc-shaped clamp 2. A through hole 4411 is provided through the middle position of the transverse side of the U-shaped frame 441. The threaded adjusting rod 442 is rotatably connected inside the through hole 4411. The movable sleeve 443 is fixedly connected to the lower surface of the fixed plate 41. The movable sleeve 443 is threadedly sleeved on the outer side of the threaded adjusting rod 442. The movable sleeve 443 is slidably connected inside the movable hole 32 at the corresponding position.

[0028] Specifically, when adjusting the height of the fixed plate 41 and the pulley 43, the threaded adjustment rod 442 is manually rotated. At this time, the movable sleeve 443 rises or falls relative to the movable hole 32, and the movable sleeve 443 drives the fixed plate 41 and the pulley 43 to move synchronously. The adjustment process is convenient and quick.

[0029] Furthermore, guide grooves 321 are symmetrically provided on both sides of the interior of the movable hole 32, and guide ribs 4431 that cooperate with and slide in conjunction with the guide grooves 321 are symmetrically fixed on both sides of the exterior of the movable sleeve 443.

[0030] Specifically, when the movable sleeve 443 slides within the movable hole 32, it will cause the guide rib 4431 to slide within the guide groove 321. The guide groove 321 limits the guide rib 4431, ensuring that the guide rib 4431 can only slide along the guide groove 321, thereby limiting and guiding the movable sleeve 443.

[0031] Furthermore, a limiting seat 444 is slidably connected to the inner side of the U-shaped frame 441. A central hole 4441 is provided through the middle of the surface of the limiting seat 444. Sliding grooves 4442 are provided through the left and right sides of the surface of the limiting seat 444. A threaded adjusting rod 442 is slidably connected inside the central hole 4441. The two sides of the U-shaped frame 441 are slidably connected to the two sets of sliding grooves 4442 respectively. Locking bolts 4443 for fixing the position are threadedly connected to both sides of the limiting seat 444. Long grooves 4412 are provided on the outer sides of both sides of the U-shaped frame 441. The ends of the locking bolts 4443 abut against the long grooves 4412. Scale lines 4413 for indicating the position of the limiting seat 444 are provided on the outer sides of both sides of the U-shaped frame 441.

[0032] Specifically, when adjusting the position of the movable sleeve 443 relative to the movable hole 32, the construction personnel can pre-adjust the relative position of the limiting seat 444 inside the U-shaped frame 441 according to the required pipe diameter, and then use the locking bolt 4443 to fix the position of the limiting seat 444. In this way, when adjusting the position of the movable sleeve 443 through the threaded adjusting rod 442, the lower end of the movable sleeve 443 can be limited by the limiting seat 444, ensuring that the position of the movable sleeve 443 does not exceed the predetermined range, thus making the adjustment of the entire equipment more precise and stable. Secondly, during the adjustment of the limiting seat 444, the position of the limiting seat 444 can be accurately determined according to the position indicated by the scale line 4413, making the adjustment process more convenient.

[0033] It should be noted that the scale line 4413 is related to the diameter of the clamped pipe. Construction personnel can use the markings on the scale line 4413 to determine the position of the limit seat 444 and the diameter of the pipe clamped by the annular pipe clamp, which greatly improves the efficiency and accuracy of the adjustment process.

[0034] Furthermore, two sets of limiting nuts 445 are threaded on the outer side of the threaded adjusting rod 442, and the two sets of limiting nuts 445 abut against the upper and lower surfaces of the transverse side of the U-shaped frame 441 respectively.

[0035] Specifically, after the position of pulley 43 is adjusted, the two sets of limit nuts 445 can be tightened so that they abut against the upper and lower surfaces of the transverse side of the U-shaped frame 441 respectively. At this time, the threaded adjusting rod 442 will not be able to rotate, thereby indirectly fixing the position of the movable sleeve 443 and pulley 43.

[0036] Furthermore, the elastic limiting member 51 includes a U-shaped frame 511 and a limiting block 512. Insert blocks 513 are fixedly connected to both the front and rear sides of the lower surface of the limiting block 512. Slots 5111 are opened on both sides of the upper surface of the U-shaped frame 511. Insert blocks 513 are slidably connected to the slots 5111 on the corresponding side. Multiple sets of outer cylinders 514 are fixedly connected to the upper surface of the transverse side of the U-shaped frame 511. Multiple sets of inner cylinders 515 are fixedly connected to the lower surface of the limiting block 512. The inner cylinders 515 are slidably connected to the upper inside of the outer cylinders 514. Springs 516 are installed inside the outer cylinders 514 and the inner cylinders 515.

[0037] Specifically, after the pipeline alignment and adjustment are completed, the construction personnel adjust the height of the elastic limiting component 51 using the adjusting component 2 52. During this process, the limiting block 512 will contact and fit against the outer wall of the pipeline, and as the adjusting component 2 52 is continuously adjusted, the two sets of inserts 513 on the lower surface of the limiting block 512 will gradually be inserted into the slots 5111 of the U-shaped frame 511, compressing the springs 516 inside the outer cylinder 514 and inner cylinder 515. While being compressed, the springs 516 will release elastic force to the limiting block 512, thereby elastically abutting the limiting block 512 against the outer wall of the pipeline, thus enabling the pipeline to rotate and be limited.

[0038] Furthermore, limit holes 311 are provided at the middle position of the upper arc-shaped clamp 3 and the lower arc-shaped clamp 2, and on the front and rear sides of the threaded hole 31. The second adjusting member 52 includes a second threaded adjusting rod 521, which is threadedly connected to the inside of the threaded hole 31. The upper end of the second threaded adjusting rod 521 is rotatably connected to the lower surface of the U-shaped frame 511. Limit rods 522 are fixedly connected to the front and rear sides of the lower surface of the U-shaped frame 511. The limit rods 522 are slidably connected in the limit holes 311 on the corresponding side.

[0039] Specifically, through the cooperation of the limiting rod 522 and the limiting hole 311, when adjusting the relative position of the threaded adjusting rod 521, the U-shaped frame 511 can only slide along a predetermined path and cannot rotate. Specifically, when adjusting the position of the elastic limiting member 51, the construction worker only needs to manually rotate the threaded adjusting rod 521. The relative position of the threaded adjusting rod 521 and the threaded hole 31 changes, which in turn causes the U-shaped frame 511 to change position. The adjustment method is simple and convenient.

[0040] It should be noted that: 1. The up, down, left, and right orientations mentioned in the text regarding positioning component 4 and limiting component 5 are based on... Figure 5-7 The determination is based on the views and schematic diagrams shown. 2. The fixing and adjustment methods of the docking frame 1 and the pipe clamps on the docking frame 1 mentioned above are all existing technologies in this field, and will not be described in detail here.

[0041] The above are merely preferred embodiments of this utility model and are not intended to limit this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A clamp coupling for use in a HDPE pipe butt joint frame, characterized in that: It includes a lower arc-shaped clamp (2) and an upper arc-shaped clamp (3). The lower arc-shaped clamp (2) and the upper arc-shaped clamp (3) are interlocked to form an annular pipe clamp and are installed on the docking frame (1). The inner side of the annular pipe clamp is provided with four sets of positioning components (4) for supporting and positioning the end of the pipe. The four sets of positioning components (4) are respectively arranged in pairs on the lower arc-shaped clamp (2) and the upper arc-shaped clamp (3). The positioning component (4) includes a fixed plate (41) and multiple sets of U-shaped seats (42). The multiple sets of U-shaped seats (42) are fixedly connected to the upper surface of the fixed plate (41). A pulley (43) is rotatably connected to the inner side of the opening of the U-shaped seat (42). An adjusting component (44) for adjusting its height is connected to the lower surface of the fixed plate (41). The adjusting component (44) is installed on the lower arc-shaped clamp (2) or the upper arc-shaped clamp (3). The lower arc clamp (2) and the upper arc clamp (3) are both provided with a limiting component (5) to restrict the rotation of the pipe. The limiting component (5) includes an elastic limiting member (51). The lower end of the elastic limiting member (51) is connected to an adjusting member two (52) for adjusting its height. The adjusting member two (52) is installed on the lower arc clamp (2) or the upper arc clamp (3).

2. A clamp coupling for use with a HDPE pipe butt joint frame according to claim 1, characterized in that, The pulley (43) has a shaft (431) fixedly passing through its center. The shaft (431) is rotatably connected to the upper opening of the U-shaped seat (42). One end of the shaft (431) is threaded with a fixing nut (432) to restrict the rotation of the shaft (431).

3. A clamp coupling for use with a HDPE pipe butt joint frame according to claim 2, characterized in that, Multiple sets of rubber rings (433) are fixedly sleeved on the outer side of the pulley (43).

4. A clamp coupling for use with a HDPE pipe butt joint frame according to claim 1, characterized in that, Both the upper arc-shaped clamp (3) and the lower arc-shaped clamp (2) have threaded holes (31) through them at their middle positions. The positions of the threaded holes (31) correspond one-to-one with the positions of the limiting components (5). Movable holes (32) are provided on both sides of the threaded holes (31). The positions of the movable holes (32) correspond one-to-one with the positions of the first adjusting component (44). The first adjusting component (44) includes a U-shaped frame (441), a threaded adjusting rod (442), and a movable sleeve (443). The U-shaped frame (441) The upper arc-shaped clamp (3) or the lower arc-shaped clamp (2) is fixedly connected to the outside of the U-shaped frame (441). A through hole (4411) is opened through the middle of the transverse side of the frame (441). The threaded adjusting rod (442) is rotatably connected to the inside of the through hole (4411). The movable sleeve (443) is fixedly connected to the lower surface of the fixed plate (41). The movable sleeve (443) is threaded on the outside of the threaded adjusting rod (442). The movable sleeve (443) is slidably connected to the inside of the movable hole (32) at the corresponding position.

5. A clamp coupling for use with a HDPE pipe butt joint frame according to claim 4, characterized in that, The movable hole (32) has symmetrical guide grooves (321) on both sides inside, and the movable sleeve (443) has symmetrical guide ribs (4431) on both sides outside that slide in cooperation with the guide grooves (321).

6. A clamp coupling for use with a HDPE pipe butt joint frame according to claim 4, characterized in that, The inner side of the U-shaped frame (441) is slidably connected to a limiting seat (444). A central hole (4441) is provided through the middle of the surface of the limiting seat (444). Sliding grooves (4442) are provided through the left and right sides of the surface of the limiting seat (444). The threaded adjusting rod (442) is slidably connected inside the central hole (4441). The two sides of the U-shaped frame (441) are slidably connected to two sets of sliding grooves (4442). The two sides of the limiting seat (444) are threadedly connected to locking bolts (4443) for fixing its position. Long grooves (4412) are provided on the outer sides of the two sides of the U-shaped frame (441). The end of the locking bolt (4443) abuts in the long groove (4412). Scale lines (4413) for indicating the position of the limiting seat (444) are provided on the outer sides of the two sides of the U-shaped frame (441).

7. A clamp coupling for use with a HDPE pipe butt joint frame according to claim 4, characterized in that, The outer thread of the threaded adjusting rod (442) is fitted with two sets of limiting nuts (445), and the two sets of limiting nuts (445) abut against the upper and lower surfaces of the transverse side of the U-shaped frame (441).

8. A clamp coupling for use with a HDPE pipe butt joint frame according to claim 4, characterized in that, The elastic limiting member (51) includes a U-shaped frame (511) and a limiting block (512). The lower surface of the limiting block (512) is fixedly connected with inserts (513) on both the front and rear sides. The upper surface of both sides of the U-shaped frame (511) is provided with slots (5111). The inserts (513) are slidably connected to the slots (5111) on the corresponding side. The upper surface of the transverse side of the U-shaped frame (511) is fixedly connected with multiple sets of outer cylinders (514). The lower surface of the limiting block (512) is fixedly connected with multiple sets of inner cylinders (515). The inner cylinders (515) are slidably connected to the upper inside of the outer cylinders (514). Springs (516) are installed inside the outer cylinders (514) and the inner cylinders (515).

9. A clamp coupling for use with a HDPE pipe butt joint frame according to claim 8, characterized in that, The upper arc-shaped clamp (3) and the lower arc-shaped clamp (2) are located at the middle position and on the front and rear sides of the threaded hole (31), respectively, and the adjusting component two (52) includes a threaded adjusting rod two (521). The threaded adjusting rod two (521) is threadedly connected to the inside of the threaded hole (31). The upper end of the threaded adjusting rod two (521) is rotatably connected to the lower surface of the U-shaped frame (511). The lower surface of the U-shaped frame (511) is fixedly connected to the front and rear sides of the lower surface, respectively, and the limiting rod (522) is slidably connected in the limiting hole (311) on the corresponding side.

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