Adjustable pipe clamping device for PE pipe

Abstract

The invention discloses an adjustable pipe clamping device for PE pipes, and relates to the technical field of pipe clamping, the adjustable pipe clamping device comprises a fixing frame, two sliding frames are slidably connected to the fixing frame, and fixing cylinders are fixedly connected to the bottom ends of the two sliding frames. Through the arrangement of the clamping mechanism, in the pipe lifting process, a pipe drives a sliding rod and a first piston to move downwards through a fixing pipe under the gravity effect, so that hydraulic oil drives a movable rod, a movable column and arc-shaped clamps to move outwards, the multiple arc-shaped clamps move outwards to abut against the inner wall of the pipe, and then the pipe is fixed; when the pressure valve is opened, the butt-joint pipe and the butt-joint rod are connected into a whole, along with continuous entering of the butt-joint rod, the mounting blocks on the butt-joint pipe and the butt-joint rod make contact and expand outwards till the mounting blocks make contact with the inner wall of the pipe, then auxiliary clamping can be conducted on the pipe, clamping of pipes of different weights can be achieved, and the clamping efficiency is improved. And the clamping effect on the pipe is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of pipe clamping, and in particular to an adjustable pipe clamping device for PE pipes. Background Art

[0002] During the cutting process of PE pipes, it is necessary to hoist the PE pipes onto the cutting machine, and the PE pipes need to be fixedly clamped during the hoisting process.

[0003] Chinese Patent with publication number CN214192212U discloses a hoisting fixture and a crane. The hoisting fixture includes a flexible member and a pair of clamping arms. The middle parts of the pair of clamping arms are hinged so that the pair of clamping arms can rotate relative to each other. The flexible member is respectively connected to the tops of the pair of clamping arms. The flexible member is arranged to be deformed under the action of an external force and drive the tops of the pair of clamping arms to approach each other or move away from each other, so that the bottoms of the pair of clamping arms can rotate to approach each other correspondingly to clamp the object to be hoisted or move away from each other to release the object to be hoisted.

[0004] Based on the above search and in combination with the prior art, it is found that: during the hoisting process of PE pipes, it is necessary to use a fixture to clamp and fix the PE pipes. The diameters, wall thicknesses and surface states of existing PE pipes vary greatly. Traditional fixtures are difficult to dynamically adjust the clamping force, resulting in unstable clamping effects. Moreover, most fixtures rely on manual adjustment or preset parameters and lack a real-time feedback mechanism, and cannot automatically adjust the clamping force according to the weight of the pipes, so the safety is poor. Summary of the Invention

[0005] The purpose of the present invention is to provide an adjustable pipe clamping device for PE pipes to solve the problems raised in the above background art.

[0006] The technical solution of the present invention is: an adjustable pipe clamping device for PE pipes, including a fixed frame, on which two sliding frames are slidably connected. Fixed cylinders are fixedly connected to the bottoms of the two sliding frames. The device further includes: A controller, which is fixedly connected to the fixed frame; A clamping mechanism, which is located on the fixed frame; The clamping mechanism includes a driving unit, a clamping unit, a docking unit, and an extrusion unit. The clamping unit includes pistons I respectively slidably connected within two fixed cylinders. The bottoms of the two pistons I are fixedly connected with sliding rods. The two sliding rods are respectively slidably connected to the two fixed cylinders. The bottom ends of the two sliding rods are fixedly connected with fixed pipes. The two fixed cylinders and the two fixed pipes are jointly fixedly connected with an oil inlet pipe. A plurality of mounting pipes are fixedly communicated with the two fixed pipes. A movable rod is slidably connected to each of the plurality of mounting pipes. A movable column is slidably connected to each of the plurality of movable rods. One end of each of the plurality of movable columns is fixedly connected with an arc-shaped clamp. A pressure sensor is fixedly connected to the inner wall of each of the plurality of movable rods. A telescopic spring is arranged inside each of the plurality of movable rods. Two ends of the telescopic spring are respectively fixedly connected with the movable column and the pressure sensor. The controller is electrically connected to the pressure sensor.

[0007] Preferably, a telescopic column is fixedly connected to the inner wall of the top of the fixed cylinder. The bottom end of the telescopic column is fixedly connected to the piston I. A return spring is sleeved on the telescopic column. Two ends of the return spring are respectively fixedly connected with the piston I and the fixed cylinder.

[0008] Preferably, an electric telescopic rod is fixedly connected to the top of each of the two fixed cylinders. The bottom end of the electric telescopic rod is fixedly connected with a fixed rod. The bottom end of the fixed rod contacts the top of the piston I. The electric telescopic rod is electrically connected to the controller.

[0009] Preferably, the docking unit includes a docking pipe and a docking rod respectively slidably connected to one end of each of the two fixed pipes. One end of the docking pipe and the docking rod is fixedly connected with a piston II. The two pistons II are respectively slidably connected within the two fixed pipes. A plurality of fixed blocks are fixedly connected to the docking pipe and the docking rod. A rotating rod is rotatably connected to each of the plurality of fixed blocks. The top ends of the plurality of rotating rods are rotatably connected with a pin. A mounting block is fixedly sleeved on each of the plurality of pins.

[0010] Preferably, a torsion spring is sleeved on each of the plurality of pins. Two ends of the torsion spring are respectively fixedly connected with the rotating rod and the pin.

[0011] Preferably, a plurality of elastic sheets are fixedly connected to the docking pipe and the docking rod. One end of each of the plurality of elastic sheets is respectively fixedly connected to the plurality of rotating rods.

[0012] Preferably, the extrusion unit includes L-shaped tubes respectively fixedly connected to the two fixed tubes. One end of each of the two L-shaped tubes is slidably connected with a sliding piston rod. One end of each of the two sliding piston rods is fixedly connected with a clamping plate. A branch pipe is fixedly communicated with the two L-shaped tubes and the two oil inlet pipes respectively. A pressure valve is installed on each of the two fixed tubes.

[0013] Preferably, a connecting spring is sleeved on each of the two sliding piston rods. Two ends of the connecting spring are respectively fixedly connected with the L-shaped tube and the clamping plate.

[0014] Preferably, the driving unit includes lifting lugs fixedly connected to two ends of the top of the fixed frame. A bidirectional threaded rod is rotatably connected between the two lifting lugs. Connecting blocks are fixedly connected to one ends of the two sliding frames close to each other. The two connecting blocks are screwed on the bidirectional threaded rod. A driven bevel gear is fixedly sleeved on the bidirectional threaded rod. A servo motor is fixedly connected to the fixed frame. An output end of the servo motor is fixedly connected with a driving bevel gear. The driving bevel gear meshes with the driven bevel gear. The servo motor is electrically connected to the controller.

[0015] The present invention provides an adjustable pipe clamping device for PE pipes through improvement. Compared with the prior art, the following improvements and advantages are achieved: First: Through the arrangement of the clamping mechanism of the present invention, during the process of lifting the pipe, under the action of gravity, the pipe drives the sliding rod and the first piston to move downward through the fixed pipe, so that the hydraulic oil in the fixed cylinder is squeezed into the fixed pipe through the oil inlet pipe, and drives the movable rod, the movable column and the arc-shaped clamp to move outward, so that a plurality of arc-shaped clamps move outward to abut against the inner wall of the pipe, thereby fixing the pipe. When the pressure valve is opened, the docking pipe and the docking rod are connected into one body. As the docking rod continues to enter, the mounting blocks on the docking pipe and the docking rod come into contact and expand outward until the mounting blocks contact the inner wall of the pipe, thereby being able to assist in clamping the pipe, realizing the clamping of pipes with different weights and improving the clamping effect on the pipes.

[0016] Second: Through the arrangement of the docking unit of the present invention, when the pressure is too high, the pressure valve is opened, so that the hydraulic oil in the fixed pipe squeezes the second piston to move. The two second pistons move respectively to drive the docking pipe and the docking rod to move, so that the docking rod enters the docking pipe, and then the two fixed pipes, the docking pipe and the docking rod are connected into one body, improving the stability of the fixed pipe. As the docking rod continues to enter, the docking pipe and the docking rod move to drive the fixed block, the rotating rod and the mounting block to move. Under the elastic force of the elastic piece, the mounting blocks on the docking pipe and the docking rod come into contact and expand outward until the mounting blocks contact the inner wall of the pipe, thereby being able to assist in clamping the pipe.

[0017] Thirdly: With the arrangement of the extrusion unit in the present invention, the hydraulic oil entering the oil inlet pipe can enter the L-shaped pipe through the branch pipe. The hydraulic oil extrudes the sliding piston rod and the clamping plate to move, so that the two clamping plates clamp and fix the pipe, improving the clamping and fixing effect on the pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 is the overall perspective three-dimensional structure schematic diagram of the present invention; Figure 2 is the three-dimensional structure schematic diagram of the clamping mechanism of the present invention; Figure 3 is the internal sectional three-dimensional structure schematic diagram of the fixed cylinder of the present invention; Figure 4 is the internal sectional structure schematic diagram of the fixed pipe of the present invention; Figure 5 is the sectional plane structure schematic diagram of the cooperation between the docking pipe and the docking rod of the present invention; Figure 6 is the three-dimensional structure schematic diagram of the cooperation between the rotating rod and the elastic sheet of the present invention; Figure 7 is the three-dimensional structure schematic diagram of the cooperation between the sliding piston rod and the clamping plate of the present invention; Figure 8 is of the present invention Figure 1 enlarged three-dimensional structure schematic diagram at A.

[0020] Reference numerals: 1. Fixed frame; 11. Sliding frame; 12. Fixed cylinder; 13. Piston I; 14. Sliding rod; 15. Fixed pipe; 16. Oil inlet pipe; 17. Installation pipe; 18. Movable rod; 19. Movable column; 110. Arc-shaped clamp; 111. Telescopic spring; 112. Pressure sensor; 2. Telescopic column; 21. Return spring; 22. Electric telescopic rod; 23. Fixed rod; 3. Pressure valve; 31. Piston II; 32. Docking pipe; 33. Docking rod; 34. Fixed block; 35. Rotating rod; 36. Axle pin; 37. Installation block; 38. Torsion spring; 39. Elastic sheet; 4. L-shaped pipe; 41. Sliding piston rod; 42. Clamping plate; 43. Connecting spring; 44. Branch pipe; 5. Servo motor; 51. Driving bevel gear; 52. Driven bevel gear; 53. Bidirectional threaded rod; 54. Connecting block; 55. Suspension ear; 6. Controller. Detailed implementation mode

[0021] The present invention will be described in detail below. The technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

[0022] The present invention provides an adjustable pipe clamping device for PE pipes by improvement. The technical solution of the present invention is as follows: As Figures 1 to 8 shown, the embodiment of the present invention provides an adjustable pipe clamping device for PE pipes, including a fixed frame 1. Two sliding frames 11 are slidably connected to the fixed frame 1. Fixed cylinders 12 are fixedly connected to the bottoms of the two sliding frames 11. It further includes: A controller 6, which is fixedly connected to the fixed frame 1; A clamping mechanism, which is located on the fixed frame 1; The clamping mechanism includes a driving unit, a clamping unit, a docking unit and an extrusion unit. The clamping unit includes pistons 13 respectively slidably connected in the two fixed cylinders 12. Sliding rods 14 are fixedly connected to the bottoms of the two pistons 13. The two sliding rods 14 are respectively slidably connected to the two fixed cylinders 12. Fixed pipes 15 are fixedly connected to the bottoms of the two sliding rods 14. Oil inlet pipes 16 are fixedly connected to the two fixed cylinders 12 and the two fixed pipes 15 together. A plurality of mounting pipes 17 are fixedly communicated with the two fixed pipes 15. Moving rods 18 are slidably connected to the plurality of mounting pipes 17. Moving columns 19 are slidably connected to the plurality of moving rods 18. Arc-shaped clamps 110 are fixedly connected to one ends of the plurality of moving columns 19. Pressure sensors 112 are fixedly connected to the inner walls of the plurality of moving rods 18. Telescopic springs 111 are arranged inside the plurality of moving rods 18. The two ends of the telescopic spring 111 are fixedly connected to the moving column 19 and the pressure sensor 112 respectively. The controller 6 is electrically connected to the pressure sensor 112. Through the setting of the clamping unit, during the process of lifting the pipe, under the action of gravity, the pipe drives the sliding rod 14 to move downward in the fixed cylinder 12 through the fixed pipe 15. The fixed cylinder 12 is filled with hydraulic oil. The movement of the sliding rod 14 drives the piston 13 to move downward, and the hydraulic oil in the fixed cylinder 12 is squeezed into the fixed pipe 15 through the oil inlet pipe 16. The hydraulic oil entering the fixed pipe 15 first enters the plurality of mounting pipes 17, so that the hydraulic oil squeezes and drives the moving rod 18, the moving column 19 and the arc-shaped clamp 110 to move outward, so that the plurality of arc-shaped clamps 110 move outward to abut against the inner wall of the pipe, thereby fixing the pipe.

[0023] Furthermore, a telescopic column 2 is fixedly connected to the inner wall of the top of the fixed cylinder 12. The bottom end of the telescopic column 2 is fixedly connected to the first piston 13. A return spring 21 is sleeved on the telescopic column 2. Two ends of the return spring 21 are respectively fixedly connected to the first piston 13 and the fixed cylinder 12. Through the arrangement of the telescopic column 2, the stability of the first piston 13 is improved.

[0024] Furthermore, electric telescopic rods 22 are fixedly connected to the tops of the two fixed cylinders 12. The bottom end of the electric telescopic rod 22 is fixedly connected to a fixed rod 23. The bottom end of the fixed rod 23 contacts the top of the first piston 13. The electric telescopic rod 22 is electrically connected to the controller 6. Through the arrangement of the electric telescopic rod 22, the pressure sensor 112 receives a pressure signal and transmits it to the controller 6 in the form of a wireless signal. When the pressure is lower than the set pressure standard value, the controller 6 starts the electric telescopic rod 22 to drive the fixed rod 23 to move downward. The fixed rod 23 moves downward to squeeze the first piston 13 to move downward until the pressure sensor 112 reaches the pressure standard value, realizing the active compensation of the clamping force.

[0025] Furthermore, the docking unit includes a docking pipe 32 and a docking rod 33 that are respectively slidably connected to one end of the two fixed pipes 15. One ends of the docking pipe 32 and the docking rod 33 are both fixedly connected to a second piston 31. The two second pistons 31 are respectively slidably connected in the two fixed pipes 15. A plurality of fixing blocks 34 are fixedly connected to both the docking pipe 32 and the docking rod 33. A rotating rod 35 is rotatably connected to each of the plurality of fixing blocks 34. The tops of the plurality of rotating rods 35 are all rotatably connected to a pin 36. A mounting block 37 is fixedly sleeved on each of the plurality of pins 36. Through the arrangement of the docking unit, when the pressure is too high, the pressure valve 3 opens, so that the hydraulic oil in the fixed pipe 15 squeezes the second piston 31 to move. The two second pistons 31 move to drive the docking pipe 32 and the docking rod 33 to move respectively, so that the docking rod 33 enters the docking pipe 32, and further the two fixed pipes 15, the docking pipe 32 and the docking rod 33 are connected into one body, improving the stability of the fixed pipe 15.

[0026] Furthermore, a torsion spring 38 is sleeved on each of the plurality of pins 36. Two ends of the torsion spring 38 are respectively fixedly connected to the rotating rod 35 and the pin 36. Through the arrangement of the torsion spring 38, when the two mounting blocks 37 are separated, the torsion spring 38 can drive the mounting block 37 to reset.

[0027] Further, a plurality of elastic pieces 39 are fixedly connected to both the docking pipe 32 and the docking rod 33, and one ends of the plurality of elastic pieces 39 are respectively fixedly connected to a plurality of rotating rods 35; through the arrangement of the elastic pieces 39, as the docking rod 33 continuously enters, driven by the movement of the docking pipe 32 and the docking rod 33, the fixed block 34, the rotating rod 35 and the mounting block 37 move. Under the elastic force of the elastic pieces 39, the mounting blocks 37 on the docking pipe 32 and the docking rod 33 contact and expand outwards until the mounting blocks 37 contact the inner wall of the pipe, thereby being able to assist in clamping the pipe and improving the clamping effect on the pipe.

[0028] Further, the extrusion unit includes L-shaped pipes 4 respectively fixedly connected to two fixed pipes 15. One ends of the two L-shaped pipes 4 are both slidably connected with sliding piston rods 41. One ends of the two sliding piston rods 41 are both fixedly connected with clamping plates 42. The two L-shaped pipes 4 and two oil inlet pipes 16 are jointly fixedly communicated with branch pipes 44. Pressure valves 3 are installed on both of the two fixed pipes 15; through the arrangement of the extrusion unit, the hydraulic oil entering the oil inlet pipe 16 can enter the L-shaped pipes 4 through the branch pipes 44. The hydraulic oil extrudes the sliding piston rods 41 and the clamping plates 42 to move, so that the two clamping plates 42 clamp and fix the pipe, improving the clamping and fixing effect on the pipe.

[0029] Further, connecting springs 43 are sleeved on both of the two sliding piston rods 41, and two ends of the connecting springs 43 are respectively fixedly connected with the L-shaped pipes 4 and the clamping plates 42; through the arrangement of the connecting springs 43, when the hydraulic oil is drawn back into the fixed cylinder 12, the connecting springs 43 can drive the clamping plates 42 to reset.

[0030] Further, the driving unit includes lifting lugs 55 fixedly connected to both ends of the top of the fixed frame 1. A bidirectional threaded rod 53 is rotatably connected between the two lifting lugs 55. One ends of the two sliding frames 11 close to each other are both fixedly connected with connecting blocks 54. The two connecting blocks 54 are both screwed on the bidirectional threaded rod 53. A driven bevel gear 52 is fixedly sleeved on the bidirectional threaded rod 53. A servo motor 5 is fixedly connected to the fixed frame 1. An output end of the servo motor 5 is fixedly connected with a driving bevel gear 51. The driving bevel gear 51 meshes with the driven bevel gear 52. The servo motor 5 is electrically connected to the controller 6; through the arrangement of the driving unit, the servo motor 5 drives the driving bevel gear 51 to rotate. The driving bevel gear 51 drives the driven bevel gear 52 and the bidirectional threaded rod 53 to rotate. The rotation of the bidirectional threaded rod 53 drives the connecting blocks 54 and the sliding frames 11 to move, so that the two sliding frames 11 approach each other. The movement of the sliding frames 11 drives the fixed cylinder 12, the sliding rod 14, and the fixed pipes 15 to move, so that the two fixed pipes 15 enter the pipe from both ends of the pipe, realizing the pushing of the fixed pipes 15 into the pipe.

[0031] Specific implementation steps: The servo motor 5 drives the driving bevel gear 51 to rotate. The driving bevel gear 51 drives the driven bevel gear 52 and the bidirectional threaded rod 53 to rotate. The rotation of the bidirectional threaded rod 53 drives the connecting block 54 and the sliding frame 11 to move, causing the two sliding frames 11 to approach each other. The movement of the sliding frame 11 drives the fixed cylinder 12, the sliding rod 14, and the fixed pipe 15 to move, so that the two fixed pipes 15 enter the pipe from both ends of the pipe. The movement of the fixed pipe 15 drives the mounting pipe 17, the movable rod 18, the movable column 19, and the arc-shaped clamp 110 to enter the pipe. When the crane lifts the fixed frame 1, the fixed pipe 15 lifts the pipe through the arc-shaped clamp 110. During the lifting process of the pipe, under the action of gravity, the pipe drives the sliding rod 14 to move downward in the fixed cylinder 12 through the fixed pipe 15. The fixed cylinder 12 is filled with hydraulic oil. The movement of the sliding rod 14 drives the piston 13 to move downward, squeezing the hydraulic oil in the fixed cylinder 12 into the fixed pipe 15 through the oil inlet pipe 16. The hydraulic oil entering the fixed pipe 15 first enters the multiple mounting pipes 17, causing the hydraulic oil to squeeze and drive the movable rod 18, the movable column 19, and the arc-shaped clamp 110 to move outward, so that the multiple arc-shaped clamps 110 move outward and abut against the inner wall of the pipe, thereby fixing the pipe. When the arc-shaped clamp 110 contacts the pipe, the arc-shaped clamp 110 stops moving, and the movable rod 18 continues to move outward. The movable rod 18 drives the pressure sensor 112 to drive the telescopic spring 111 to compress and undergo elastic deformation. At the same time, the pressure sensor 112 receives a pressure signal and transmits it to the controller 6 in the form of a wireless signal. When the pressure is lower than the set pressure standard value, active compensation for the clamping force is realized. The controller 6 starts the electric telescopic rod 22 to drive the fixed rod 23 to move downward. The downward movement of the fixed rod 23 squeezes the piston 13 to move downward until the pressure sensor 112 reaches the pressure standard value. When the pressure is too high, the pressure valve 3 opens, causing the hydraulic oil in the fixed pipe 15 to squeeze the piston 2 31 to move. The movement of the two pistons 2 31 drives the butt joint pipe 32 and the butt joint rod 33 to move respectively, so that the butt joint rod 33 enters the butt joint pipe 32, thereby connecting the two fixed pipes 15, the butt joint pipe 32, and the butt joint rod 33 into one body, improving the stability of the fixed pipe 15. As the butt joint rod 33 continues to enter, the movement of the butt joint pipe 32 and the butt joint rod 33 drives the fixed block 34, the rotating rod 35, and the mounting block 37 to move. Under the elastic force of the elastic piece 39, the mounting blocks 37 on the butt joint pipe 32 and the butt joint rod 33 contact and expand outward until the mounting blocks 37 contact the inner wall of the pipe, thereby being able to assist in clamping the pipe. During the lifting process of the pipe, the arc-shaped clamp 110 automatically expands to fix the pipe. When the pipe is heavier, the two fixed pipes 15 can be connected into one body, improving the stability of the clamp. When the pipe is even heavier, the mounting blocks 37 expand outward and abut against the inner wall of the pipe, realizing the ability to clamp pipes of different weights and improving the clamping effect on the pipe. The hydraulic oil entering the oil inlet pipe 16 can enter the L-shaped pipe 4 through the branch pipe 44.The hydraulic oil squeezes to move the sliding piston rod 41 and the clamping plates 42, so that the two clamping plates 42 clamp and fix the pipe, improving the clamping and fixing effect on the pipe.

[0032] The above description enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An adjustable pipe clamping device for PE pipes, comprising a fixed frame (1), characterized in that: Two sliding frames (11) are slidably connected to the fixing frame (1). Fixing cylinders (12) are fixedly connected to the bottoms of the two sliding frames (11). Further included are: A controller (6) fixedly connected to the fixing frame (1); A clamping mechanism located on the fixing frame (1); The clamping mechanism includes a driving unit, a clamping unit, a docking unit, and a pressing unit. The clamping unit includes pistons I (13) slidably connected to the two fixing cylinders (12) respectively. Fixing rods (14) are fixedly connected to the bottoms of the two pistons I (13). The two fixing rods (14) are respectively slidably connected to the two fixing cylinders (12). Fixing pipes (15) are fixedly connected to the bottoms of the two fixing rods (14). An oil inlet pipe (16) is fixedly connected to the two fixing cylinders (12) and the two fixing pipes (15) together. A plurality of mounting pipes (17) are fixedly communicated with the two fixing pipes (15). Moving rods (18) are slidably connected to the plurality of mounting pipes (17). Moving columns (19) are slidably connected to the plurality of moving rods (18). Arc-shaped clamps (110) are fixedly connected to one ends of the plurality of moving columns (19). Pressure sensors (112) are fixedly connected to the inner walls of the plurality of moving rods (18). Telescopic springs (111) are arranged inside the plurality of moving rods (18). Two ends of the telescopic spring (111) are fixedly connected to the moving column (19) and the pressure sensor (112) respectively. The controller (6) is electrically connected to the pressure sensor (112).

2. The adjustable pipe clamping device for PE pipes according to claim 1, wherein: A telescopic column (2) is fixedly connected to the inner wall of the top of the fixing cylinder (12). The bottom end of the telescopic column (2) is fixedly connected to the piston I (13). A return spring (21) is sleeved on the telescopic column (2). Two ends of the return spring (21) are fixedly connected to the piston I (13) and the fixing cylinder (12) respectively.

3. The adjustable pipe clamping device for PE pipes according to claim 2, characterized in that: Electric telescopic rods (22) are fixedly connected to the tops of the two fixing cylinders (12). A fixing rod (23) is fixedly connected to the bottom end of the electric telescopic rod (22). The bottom end of the fixing rod (23) contacts the top of the piston I (13). The electric telescopic rod (22) is electrically connected to the controller (6).

4. An adjustable pipe clamping device for PE pipes according to claim 3, characterized in that: The docking unit includes a docking pipe (32) and a docking rod (33) slidably connected to one ends of the two fixing pipes (15) respectively. Pistons II (31) are fixedly connected to one ends of the docking pipe (32) and the docking rod (33). The two pistons II (31) are respectively slidably connected to the two fixing pipes (15). A plurality of fixing blocks (34) are fixedly connected to the docking pipe (32) and the docking rod (33). Rotating rods (35) are rotatably connected to the plurality of fixing blocks (34). Axle pins (36) are rotatably connected to the tops of the plurality of rotating rods (35). Mounting blocks (37) are fixedly sleeved on the plurality of axle pins (36).

5. The adjustable pipe clamping device for PE pipes according to claim 4, characterized in that: A torsion spring (38) is sleeved on multiple said shaft pins (36), and two ends of the torsion spring (38) are fixedly connected to the rotating rod (35) and the shaft pin (36) respectively.

6. The adjustable pipe clamping device for PE pipes according to claim 5, characterized in that: A plurality of elastic pieces (39) are fixedly connected to both the docking pipe (32) and the docking rod (33), and one ends of the plurality of elastic pieces (39) are respectively fixedly connected to the plurality of rotating rods (35).

7. The adjustable pipe clamping device for PE pipes according to claim 1, characterized in that: The extrusion unit includes L-shaped pipes (4) respectively fixedly connected to two said fixed pipes (15). A sliding piston rod (41) is slidably connected to one end of each of the two L-shaped pipes (4). A clamping plate (42) is fixedly connected to one end of each of the two sliding piston rods (41). A branch pipe (44) is fixedly communicated with both the two L-shaped pipes (4) and the two oil inlet pipes (16). A pressure valve (3) is installed on each of the two fixed pipes (15).

8. An adjustable pipe clamping device for PE pipes according to claim 7, characterized in that: A connecting spring (43) is sleeved on each of the two sliding piston rods (41), and two ends of the connecting spring (43) are fixedly connected to the L-shaped pipe (4) and the clamping plate (42) respectively.

9. The adjustable pipe clamping device for PE pipes according to claim 7, characterized in that: The driving unit includes lifting lugs (55) fixedly connected to two ends of the top of the fixed frame (1). A bidirectional threaded rod (53) is rotatably connected to the two lifting lugs (55) together. Connecting blocks (54) are fixedly connected to one ends of the two sliding frames (11) close to each other. The two connecting blocks (54) are both screwed on the bidirectional threaded rod (53). A driven bevel gear (52) is fixedly sleeved on the bidirectional threaded rod (53). A servo motor (5) is fixedly connected to the fixed frame (1). An output end of the servo motor (5) is fixedly connected to a driving bevel gear (51). The driving bevel gear (51) meshes with the driven bevel gear (52). The servo motor (5) is electrically connected to the controller (6).

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