A device for trimming the plastic-lined composite layer of a steel pipe and its usage method

Abstract

The present invention discloses a device for trimming the end of a plastic-lined composite layer of a steel pipe and its usage method, including a circular plate. A number of annular openings are formed in the inner cavity of the circular plate, and the number of the annular openings is arranged in an annular array centered on the center of the circular plate. A moving rod penetrates through the inner cavity of the circular plate. A limiting tube is fixedly connected to the left end of the moving rod. A middle rod penetrates through the inner cavity of the limiting tube near the left end. A movable tube is sleeved on the outer side of the limiting tube near the left end. Through the mutual cooperation among components such as a mounting plate, an L-shaped connecting piece, a spring, a driven gear, a driving gear, a reciprocating plate, a first sliding plate, a second sliding plate, a sleeve plate, a round rod, a lead screw, a limiting rod, a cutting machine, and a cutting wheel, the present invention can realize that when the plastic-lined pipe section inside the plastic-lined steel pipe extends out, it can drive a push plate to move. When the push plate moves, a trigger switch can be activated, thereby starting a driving motor to cut the plastic-lined pipe section, realizing the function of automatic detection and cutting and improving the trimming efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic-lined steel pipes, and in particular to a device for trimming the end of the plastic-lined composite layer of a steel pipe and a method for using the same. Background Technique

[0002] The plastic-lined steel pipe uses a galvanized seamless steel pipe or a welded steel pipe as the base pipe. After removing the welding beads from the inner wall, a food-grade polyethylene pipe with the same diameter as the inside of the galvanized pipe is lined, and finally it is formed after pressurizing and heating for a certain period of time. It is an upgraded product of the traditional galvanized pipe.

[0003] At present, there are three methods for manufacturing plastic-lined steel pipes. The first method is to force the steel pipe through a steel die with a diameter smaller than the outer diameter of the steel pipe, so that the inner diameter of the steel pipe becomes smaller. The second method is to heat the steel pipe and the plastic liner together to 250 degrees Celsius, and then use a set of multi-stage forming internal expansion steel dies to pass through the inner diameter of the plastic liner to expand the plastic liner. The third method is to introduce boiler steam into the sealed inner cavity of the plastic liner to make the plastic liner expand and then cool and form.

[0004] When manufacturing with the above methods, an end section of the plastic liner that protrudes outside the steel pipe will inevitably be generated at the end of the plastic-lined steel pipe. In subsequent processing, this section of the plastic liner surplus material needs to be removed. However, most of the existing methods for cutting the plastic liner end section are to manually determine the position of the plastic liner end section and then perform the cutting, and the cutting efficiency is too low. Summary of the Invention

[0005] To achieve the above object, the present invention provides the following technical solution: A trimming device for the plastic-lined composite layer of a steel pipe, including a circular plate. A plurality of annular openings are formed in the inner cavity of the circular plate, and the plurality of annular openings are arranged in an annular array centered on the center of the circular plate. A moving rod is disposed through the inner cavity of the circular plate. The left end of the moving rod is fixedly connected to a limiting tube. A middle rod is disposed through the inner cavity of the limiting tube near the left end. An activity tube is sleeved on the outer side of the limiting tube near the left end. The middle rod is disposed through the center of the activity tube and fixedly connected thereto. A plurality of second hinge plates are sleeved on the outer side of the activity tube. The plurality of second hinge plates are arranged in an annular array centered on the center of the activity tube. The plurality of second hinge plates are linearly arranged in sequence from left to right. A plurality of cranks are hinged to the outer sides of the plurality of second hinge plates. A third hinge plate is hinged to the corresponding side of each of the plurality of cranks. An arc plate is fixedly connected to the corresponding side of each of the plurality of third hinge plates. A plastic-lined steel pipe is jointly attached to the outer sides of the plurality of arc plates. Plastic-lined pipe sections are provided on both sides of the plastic-lined steel pipe. The right sides of the third hinge plates located on the right side penetrate the inner cavity of the annular opening. A clamping block is fixedly connected to each of the plurality of third hinge plates, and the clamping block is located on the right side of the circular plate. A placement plate is rotatably connected to the outer side of the moving rod near the right end. A bottom plate is fixedly connected to the bottom of the placement plate. A top plate is fixedly connected to the top of the placement plate. An L-shaped fixing plate is fixedly connected to the left side near the top of the top plate. A receiving tube is disposed through the side of the L-shaped fixing plate away from the top plate. Expansion rods are disposed through the left and right ends of the receiving tube. A plurality of insertion holes are formed at the top ends of the expansion rods. The plurality of insertion holes are linearly arranged in sequence from left to right. Two first hinge plates are fixedly connected to the top of the receiving tube near the left and right sides. Each two adjacent first hinge plates are symmetrically arranged front and back. A swing plate is jointly hinged between each two adjacent first hinge plates. A plug rod is fixedly connected to the bottom of the swing plate. The bottom end of the plug rod is inserted into the inner cavity of the insertion hole. A positioning plate is sleeved on the outer side of each of the two expansion rods, and the bottom of the positioning plate is attached to the outer side of the plastic-lined steel pipe. A return spring is fixedly connected to the bottom of the swing plate. The bottom end of the return spring is fixedly connected to the receiving tube.

[0006] Preferably, there is a mounting plate on the left side of the circular plate. An L-shaped top plate is fixedly connected to the top of the mounting plate. A trigger switch is mounted at the bottom of the L-shaped top plate. A first sliding groove is formed at the rear side of the mounting plate. A second sliding plate is slidably connected to the rear side of the first sliding groove. A second sliding groove is formed at the rear side of the second sliding plate. A first sliding plate is slidably connected to the second sliding groove. A reciprocating plate is fixedly connected to the front side of the first sliding plate. The upper and lower sides of the reciprocating plate are both inclined. A fitting rod is disposed through the top of the mounting plate. A bottom rod is fixedly connected to the bottom of the mounting plate. The fitting rod is located below the trigger switch.

[0007] Preferably, a round rod is fixedly connected to the left side of the mounting plate. A spring is sleeved on the outer side of the round rod. A sleeve plate is sleeved on the outer side of the round rod. The right side of the sleeve plate is fixedly connected to the spring. The right end of the spring is fixedly connected to the mounting plate. The sleeve plate is fixedly connected to the second sliding plate. A push plate is fixedly connected to the rear side of the second sliding plate.

[0008] Preferably, an L-shaped connecting piece is fixedly connected to the front side of the mounting plate. A fixing piece is fixedly connected to the horizontal side of the L-shaped connecting piece. A driven gear is connected to the front side of the fixing piece by a bearing. A lead screw passes through the center of the driven gear and is fixedly connected thereto. An L-shaped translation plate is engaged with the outer side of the lead screw near the rear end. Two limiting rods are fixedly connected to the rear side of the fixing piece. The two limiting rods are symmetrically arranged left and right. The rear ends of the two limiting rods both penetrate through the inner cavity of the L-shaped translation plate. A cutting machine is installed on the top of the L-shaped translation plate. A cutting wheel is installed on the rear side of the cutting machine. Two side plates are fixedly connected to the right side of the mounting plate. The two side plates are symmetrically arranged up and down. The right sides of the two side plates are both fixedly connected to a circular plate.

[0009] Preferably, an L-shaped mounting plate is fixedly connected to the front side of the L-shaped fixing plate. A driving motor is fixedly connected to the vertical side of the L-shaped mounting plate. A driving bevel gear is fixedly connected to the power output shaft of the driving motor. A driven bevel gear is engaged with both the left and right sides of the driving bevel gear. A cross bar is fixedly connected to the opposite side of each of the two driven bevel gears. A side bevel gear is fixedly connected to the opposite end of each of the two cross bars. A transmission bevel gear is engaged with the rear side of each of the two side bevel gears. A rotating shaft passes through the inner cavity of each of the two transmission bevel gears and is fixedly connected thereto. A driving gear is fixedly connected to the front end of the rotating shaft. The driving gear and the driven gear are engaged with each other.

[0010] Preferably, a cylinder is fixedly connected to the left end of the middle rod. A support plate is sleeved on the outer side of the cylinder.

[0011] Preferably, a vertical plate is sleeved on the outer side of the rotating shaft on the right side, and an L-shaped welding plate is sleeved on the outer side of the rotating shaft on the left side. Two linkage plates are fixedly connected to the left and right sides of the L-shaped mounting plate. An L-shaped connecting plate is fixedly connected to the corresponding side of each of the two linkage plates. The L-shaped welding plate and the vertical plate are both fixedly connected to the adjacent L-shaped connecting plate.

[0012] A steel pipe inner plastic lining composite layer end trimming device and a using method thereof include the following steps:

[0013] S1: When the cylinder starts, it can drive the middle rod to move. When the middle rod moves, it can drive the movable pipe to move. When the movable pipe moves, several cranks can drive the third hinge plate to move. At the same time, when the third hinge plate on the right side fits with the annular opening, the movement trajectory of the arc plate can be limited. When several arc plates are opened, the plastic-lined steel pipe can be supported.

[0014] S2: Subsequently, the staff pulls out the telescopic rod so that the two support plates fit with both ends of the plastic-lined steel pipe. Then, the swing plate is flipped so that the insertion rod is inserted into the inner cavity of the jack hole to complete the fixation of the position of the telescopic rod.

[0015] S3: When the plastic-lined pipe section inside the plastic-lined steel pipe extends, it can push the push plate to move. When the push plate moves, it can drive the second sliding plate to move. When the second sliding plate moves to the right, the bottom of the reciprocating plate can contact the abutting rod. At this time, the reciprocating plate can move upward along the second chute, ejecting the fitting rod. When the fitting rod moves upward, the trigger switch can be activated. When the trigger switch is activated, the driving motor can be started. When the driving motor starts, the driving bevel gear can be driven to rotate through the power output shaft. When the driving bevel gear rotates, two driven bevel gears can be driven to rotate. When the two driven bevel gears rotate, the adjacent cross bar can be driven to rotate. When the cross bar rotates, the side bevel gear can be driven to rotate. When the side bevel gear rotates, the transmission bevel gear can be driven to rotate. When the transmission bevel gear rotates, the rotating shaft can be driven to rotate. When the rotating shaft rotates, the driving gear can be driven to rotate. When the driving gear rotates, the driven gear can be driven to rotate. When the driven gear rotates, the lead screw can be driven to rotate. When the lead screw rotates, the L-shaped translation plate can be moved, thereby driving the cutting machine to move. When the cutting machine moves, the plastic-lined pipe sections at both ends of the plastic-lined steel pipe can be cut through the cutting wheel.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] Through the mutual cooperation among components such as the mounting plate, L-shaped connecting piece, spring, driven gear, driving gear, reciprocating plate, first sliding plate, second sliding plate, sleeve plate, round rod, lead screw, limiting rod, cutting machine, and cutting wheel, the present invention can achieve that when the plastic-lined pipe section inside the plastic-lined steel pipe extends, the push plate can be driven to move. When the push plate moves, the trigger switch can be activated, thereby starting the driving motor to cut the plastic-lined pipe section, realizing the function of automatic detection and cutting, and improving the trimming efficiency.

[0018] Through the mutual cooperation among components such as the movable pipe, limiting pipe, support plate, second hinge plate, crank, third hinge plate, arc plate, and cylinder, the present invention can support the inner wall of the plastic-lined steel pipe, facilitating processing. Description of the Drawings

[0019] Figure 1Schematic diagram of the structure of the present invention;

[0020] Figure 2 Right view of the structure of the present invention;

[0021] Figure 3 Right view of the internal structure of the plastic-lined steel pipe, a component of the present invention;

[0022] Figure 4 Schematic diagram of the internal structure of the plastic-lined steel pipe, a component of the present invention;

[0023] Figure 5 Left view of the structure of the mounting plate, a component of the present invention;

[0024] Figure 6 Rear view of the structure of the mounting plate, a component of the present invention;

[0025] Figure 7 Left view of the structure of the storage pipe, a component of the present invention;

[0026] Figure 8 Schematic diagram of the internal structure of the arc plate, a component of the present invention;

[0027] Figure 9 Schematic diagram of the internal structure of the movable pipe, a component of the present invention;

[0028] Figure 10 is Figure 7 enlarged view of part A in

[0029] Figure 11 Plan view of the internal structure of the movable pipe, a component of the present invention.

[0030] Reference numerals in the figure: 1, circular plate; 2, placement plate; 3, bottom plate; 4, moving rod; 5, top plate; 6, positioning plate; 7, telescopic rod; 8, storage pipe; 9, L-shaped fixing plate; 10, L-shaped mounting plate; 11, plastic-lined steel pipe; 12, L-shaped connecting plate; 13, support plate; 14, side bevel gear; 15, cross bar; 16, linkage plate; 17, driven bevel gear; 18, driving bevel gear; 19, driving motor; 20, vertical plate; 21, plastic-lined pipe section; 22, cylinder; 23, L-shaped welding plate; 24, driving bevel gear; 25, driving gear; 26, mounting plate; 27, arc plate; 28, first sliding plate; 29, L-shaped top plate; 30, reciprocating plate; 31, cutting wheel; 32, cutting machine; 33, L-shaped translation plate; 34, limiting rod; 35, fixing piece; 36, driven gear; 37, lead screw; 38, second sliding plate; 39, L-shaped connecting piece; 40, spring; 41, round rod; 42, sleeve plate; 43, bottom rod; 44, side plate; 45, fitting rod; 46, movable pipe; 47, first hinge plate; 48, block; 49, second hinge plate; 50, crank; 51, middle rod; 52, limiting pipe; 53, third hinge plate; 54, inserting rod; 55, swinging plate; 56, pushing plate. Detailed implementation mode

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0032] Please refer to Figures 1-11 , the present invention provides a technical solution: a trimming device for the plastic-lined composite layer of a steel pipe, including a circular plate 1. A number of annular openings are provided in the inner cavity of the circular plate 1, and the number of annular openings is arranged in a circular array centered on the center of the circular plate 1. A moving rod 4 penetrates through the inner cavity of the circular plate 1. The left end of the moving rod 4 is fixedly connected with a limiting tube 52. A middle rod 51 penetrates through the inner cavity of the limiting tube 52 near the left end. An activity tube 46 is sleeved on the outer side of the limiting tube 52 near the left end. The middle rod 51 penetrates through the center of the activity tube 46 and is fixedly connected thereto. A number of second hinge plates 49 are sleeved on the outer side of the activity tube 46. The number of second hinge plates 49 is arranged in a circular array centered on the center of the activity tube 46. The number of second hinge plates 49 is linearly arranged from left to right. A number of cranks 50 are hinged on the outer sides of the number of second hinge plates 49. On the corresponding sides of the number of cranks 50, a number of third hinge plates 53 are hinged. On the corresponding sides of the number of third hinge plates 53, arc-shaped plates 27 are fixedly connected. The outer sides of the number of arc-shaped plates 27 are jointly attached to a plastic-lined steel pipe 11. Plastic-lined pipe sections 21 are arranged on both sides of the plastic-lined steel pipe 11. The right sides of the third hinge plates 53 located on the right side penetrate through the inner cavities of the annular openings. A number of clamping blocks 48 are fixedly connected to the number of third hinge plates 53, and the clamping blocks 48 are located on the right side of the circular plate 1. A placing plate 2 is rotatably connected to the outer side of the moving rod 4 near the right end. A bottom plate 3 is fixedly connected to the bottom of the placing plate 2. A top plate 5 is fixedly connected to the top of the placing plate 2. An L-shaped fixing plate 9 is fixedly connected to the left side of the top plate 5 near the top. A receiving tube 8 penetrates through the side of the L-shaped fixing plate 9 away from the top plate 5. Telescopic rods 7 penetrate through both the left and right ends of the receiving tube 8. A number of jacks are provided at the top ends of the telescopic rods 7. The number of jacks is linearly arranged from left to right. Two first hinge plates 47 are fixedly connected to both sides of the top of the receiving tube 8 near the left and right sides. Each two adjacent first hinge plates 47 are symmetrically arranged front and back. A swing plate 55 is jointly hinged between each two adjacent first hinge plates 47. A plug rod 54 is fixedly connected to the bottom of the swing plate 55. The bottom end of the plug rod 54 is inserted into the inner cavity of the jack. Positioning plates 6 are sleeved on the outer sides of the two telescopic rods 7, and the bottom of the positioning plate 6 is attached to the outer side of the plastic-lined steel pipe 11. A return spring is fixedly connected to the bottom of the swing plate 55, and the bottom end of the return spring is fixedly connected to the receiving tube 8.

[0033] On the left side of the circular plate 1, there is a mounting plate 26. At the top of the mounting plate 26, an L-shaped top plate 29 is fixedly connected. A trigger switch is installed at the bottom of the L-shaped top plate 29. A first sliding groove is formed at the rear side of the mounting plate 26. A second sliding plate 38 is slidably connected to the rear side of the first sliding groove. A second sliding groove is formed at the rear side of the second sliding plate 38. A first sliding plate 28 is slidably connected to the second sliding groove. A reciprocating plate 30 is fixedly connected to the front side of the first sliding plate 28. Both the upper and lower sides of the reciprocating plate 30 are inclined. A fitting rod 45 penetrates through the top of the mounting plate 26. A bottom rod 43 is fixedly connected to the bottom of the mounting plate 26. The fitting rod 45 is located below the trigger switch. A circular rod 41 is fixedly connected to the left side of the mounting plate 26. A spring 40 is sleeved on the outer side of the circular rod 41. A sleeve plate 42 is sleeved on the outer side of the circular rod 41. The right side of the sleeve plate 42 is fixedly connected to the spring 40. The right end of the spring 40 is fixedly connected to the mounting plate 26. The sleeve plate 42 is fixedly connected to the second sliding plate 38. A push plate 56 is fixedly connected to the rear side of the second sliding plate 38.

[0034] An L-shaped connecting piece 39 is fixedly connected to the front side of the mounting plate 26. A fixing piece 35 is fixedly connected to the horizontal side of the L-shaped connecting piece 39. A driven gear 36 is connected to the front side of the fixing piece 35 by a bearing. A lead screw 37 penetrates through the center of the driven gear 36 and is fixedly connected thereto. An L-shaped translation plate 33 is engaged with the outer side of the lead screw 37 near the rear end. Two limiting rods 34 are fixedly connected to the rear side of the fixing piece 35. The two limiting rods 34 are symmetrically arranged left and right. The rear ends of the two limiting rods 34 both penetrate through the inner cavity of the L-shaped translation plate 33. A cutting machine 32 is installed at the top of the L-shaped translation plate 33. A cutting wheel 31 is installed at the rear side of the cutting machine 32. Two side plates 44 are fixedly connected to the right side of the mounting plate 26. The two side plates 44 are symmetrically arranged up and down. The right sides of the two side plates 44 are both fixedly connected to the circular plate 1. An L-shaped fixing plate 9 is fixedly connected to the front side of an L-shaped mounting plate 10. A driving motor 19 is fixedly connected to the vertical side of the L-shaped mounting plate 10. A driving bevel gear 18 is fixedly connected to the power output shaft of the driving motor 19. A driven bevel gear 17 is engaged with both the left and right sides of the driving bevel gear 18. A cross bar 15 is fixedly connected to the opposite side of each of the two driven bevel gears 17. A side bevel gear 14 is fixedly connected to the opposite end of each of the two cross bars 15. A transmission bevel gear 24 is engaged with the rear side of each of the two side bevel gears 14. A rotating shaft penetrates through the inner cavity of each of the two transmission bevel gears 24 and is fixedly connected thereto. A driving gear 25 is fixedly connected to the front end of the rotating shaft. The driving gear 25 is meshed with the driven gear 36. A cylinder 22 is fixedly connected to the left end of the middle rod 51. A support plate 13 is sleeved on the outer side of the cylinder 22. A vertical plate 20 is sleeved on the outer side of the rotating shaft on the right side. An L-shaped welding plate 23 is sleeved on the outer side of the rotating shaft on the left side. Two linkage plates 16 are fixedly connected to both the left and right sides of the L-shaped mounting plate 10. An L-shaped connecting plate 12 is fixedly connected to the corresponding side of each of the two linkage plates 16. The L-shaped welding plate 23 and the vertical plate 20 are both fixedly connected to the adjacent L-shaped connecting plate 12.

[0035] A steel pipe lining plastic composite layer end repair device and use method, comprising the following steps:

[0036] S1: When the cylinder 22 is started, the middle rod 51 can be driven to move, and when the middle rod 51 moves, the movable tube 46 can be driven to move. When the movable tube 46 moves, the third hinged plate 53 can be driven to move through the cranks 50. At the same time, when the third hinged plate 53 on the right side is fitted with the annular opening, the moving track of the arc plate 27 can be limited. When the arc plates 27 are opened, the plastic-lined steel pipe 11 can be supported;

[0037] S2: Then, the staff pulls out the telescopic rod 7 so that the two support plates 13 fit the two ends of the plastic-lined steel pipe 11, and then flips the swing plate 55 so that the insertion rod 54 is inserted into the inner cavity of the insertion hole to complete the fixing of the position of the telescopic rod 7;

[0038] S3: When the plastic-lined pipe material section 21 inside the plastic-lined steel pipe 11 extends out, the push plate 56 can be pushed to move. When the push plate 56 moves, the second slide plate 38 can be driven to move. When the second slide plate 38 moves to the right, the bottom of the reciprocating plate 30 can contact the push rod 43. At this time, the reciprocating plate 30 can move upward along with the second slide groove to push out the fitting rod 45. When the fitting rod 45 moves upward, the trigger switch can be started. When the trigger switch is started, the active motor 19 can be started. When the active motor 19 is started, the active bevel gear 18 can be driven to rotate through the power output shaft. When the active bevel gear 18 rotates, it can drive the two driven bevel gears 17 to rotate. When the two driven bevel gears 17 are driven When the gear 17 rotates, it can drive the adjacent cross bar 15 to rotate. When the cross bar 15 rotates, it can drive the side bevel gear 14 to rotate. When the side bevel gear 14 rotates, it can drive the transmission bevel gear 24 to rotate. When the transmission bevel gear 24 rotates, it can drive the rotating shaft to rotate. When the rotating shaft rotates, it can drive the driving gear 25 to rotate. When the driving gear 25 rotates, it can drive the driven gear 36 to rotate. When the driven gear 36 rotates, it can drive the screw rod 37 to rotate. When the screw rod 37 rotates, the L-shaped translation plate 33 can be moved, thereby driving the cutting machine 32 to move. When the cutting machine 32 moves, the plastic-lined pipe material sections 21 at both ends of the plastic-lined steel pipe 11 can be cut by the cutting wheel 31.

[0039] Working principle: When the cylinder 22 is started, the middle rod 51 can be driven to move, and when the middle rod 51 moves, the movable tube 46 can be driven to move. When the movable tube 46 moves, the third hinge plate 53 can be driven to move through the cranks 50. At the same time, when the third hinge plate 53 on the right side is in contact with the annular opening, the moving track of the arc plate 27 can be limited. When the arc plates 27 are opened, the plastic-lined steel pipe 11 can be supported. Then, the staff pulls out the telescopic rod 7 to make the movable tube 46 move. The two support plates 13 are fitted with the two ends of the plastic-lined steel pipe 11. Then, the swing plate 55 is flipped to insert the insertion rod 54 into the inner cavity of the insertion hole to fix the position of the telescopic rod 7. When the plastic-lined pipe material section 21 inside the plastic-lined steel pipe 11 extends, the push plate 56 can be pushed to move. When the push plate 56 moves, the second slide plate 38 can be driven to move. When the second slide plate 38 moves to the right, the bottom of the reciprocating plate 30 can contact the stop rod 43. At this time, the reciprocating plate 30 can move upward along with the second slide groove to fit the sticking rod 45. When the fitting rod 45 moves upward, the trigger switch can be activated. When the trigger switch is activated, the active motor 19 can be activated. When the active motor 19 is activated, the active bevel gear 18 can be driven to rotate through the power output shaft. When the active bevel gear 18 rotates, the two driven bevel gears 17 can be driven to rotate. When the two driven bevel gears 17 rotate, the adjacent cross bar 15 can be driven to rotate. When the cross bar 15 rotates, the side bevel gear 14 can be driven to rotate. When the side bevel gear 14 rotates, it can drive The transmission bevel gear 24 rotates, and when the transmission bevel gear 24 rotates, it can drive the rotating shaft to rotate, and when the rotating shaft rotates, it can drive the driving gear 25 to rotate, and when the driving gear 25 rotates, it can drive the driven gear 36 to rotate, and when the driven gear 36 rotates, it can drive the screw rod 37 to rotate, and when the screw rod 37 rotates, the L-shaped translation plate 33 can be moved, thereby driving the cutting machine 32 to move, and when the cutting machine 32 moves, the plastic-lined pipe material sections 21 at both ends of the plastic-lined steel pipe 11 can be cut by the cutting wheel 31.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for trimming the plastic-lined composite layer of a steel pipe, comprising a circular plate (1), characterized in that: The inner cavity of the circular plate (1) is provided with a number of annular openings, and the number of the annular openings are arranged in an annular array centered on the center of the circular plate (1). A moving rod (4) penetrates through the inner cavity of the circular plate (1). The left end of the moving rod (4) is fixedly connected with a limiting tube (52). A middle rod (51) penetrates through the inner cavity of the limiting tube (52) near the left end. An activity tube (46) is sleeved on the outer side of the limiting tube (52) near the left end. The middle rod (51) penetrates through the center of the activity tube (46) and is fixedly connected thereto. A number of second hinge plates (49) are sleeved on the outer side of the activity tube (46). The number of the second hinge plates (49) are arranged in an annular array centered on the center of the activity tube (46). The number of the second hinge plates (49) are linearly arranged in sequence from left to right. A number of cranks (50) are hinged to the outer sides of the number of the second hinge plates (49). A number of third hinge plates (53) are hinged to the corresponding sides of the number of the cranks (50). A number of arc-shaped plates (27) are fixedly connected to the corresponding sides of the number of the third hinge plates (53). The outer sides of the number of the arc-shaped plates (27) are jointly attached to a plastic-lined steel pipe (11). Plastic-lined pipe sections (21) are arranged on both sides of the plastic-lined steel pipe (11). The inner cavities of the annular openings penetrate through the right sides of the third hinge plates (53) located on the right side. A number of clamping blocks (48) are fixedly connected to the number of the third hinge plates (53), and the clamping blocks (48) are located on the right side of the circular plate (1). A placing plate (2) is rotatably connected to the outer side of the moving rod (4) near the right end. A bottom plate (3) is fixedly connected to the bottom of the placing plate (2). A top plate (5) is fixedly connected to the top of the placing plate (2). An L-shaped fixing plate (9) is fixedly connected to the left side of the top plate (5) near the top. A receiving tube (8) penetrates through the side of the L-shaped fixing plate (9) away from the top plate (5). Expansion rods (7) penetrate through both the left and right ends of the receiving tube (8). A number of insertion holes are formed at the top ends of the expansion rods (7). The number of the insertion holes are linearly arranged in sequence from left to right. Two first hinge plates (47) are fixedly connected to both sides of the top of the receiving tube (8) near the left and right sides. Each two adjacent first hinge plates (47) are symmetrically arranged front and back. A swing plate (55) is jointly hinged between each two adjacent first hinge plates (47). A plug rod (54) is fixedly connected to the bottom of the swing plate (55). The bottom end of the plug rod (54) is inserted into the inner cavity of the insertion hole. Positioning plates (6) are sleeved on the outer sides of the two expansion rods (7), and the bottom of the positioning plate (6) is attached to the outer side of the plastic-lined steel pipe (11). A return spring is fixedly connected to the bottom of the swing plate (55). The bottom end of the return spring is fixedly connected to the receiving tube (8). There is a mounting plate (26) on the left side of the circular plate (1). An L-shaped top plate (29) is fixedly connected to the top of the mounting plate (26). A trigger switch is mounted on the bottom of the L-shaped top plate (29). A first sliding groove is formed at the rear side of the mounting plate (26). A second sliding plate (38) is slidably connected to the rear side of the first sliding groove.A second chute is provided at the rear side of the second sliding plate (38), the second chute is slidably connected to a first sliding plate (28), a reciprocating plate (30) is fixedly connected to the front side of the first sliding plate (28), both the upper and lower sides of the reciprocating plate (30) are inclined, a fitting rod (45) penetrates through the top of the mounting plate (26), a bottom rod (43) is fixedly connected to the bottom of the mounting plate (26), the fitting rod (45) is located below the trigger switch, a round rod (41) is fixedly connected to the left side of the mounting plate (26), a spring (40) is sleeved on the outer side of the round rod (41), a sleeve plate (42) is sleeved on the outer side of the round rod (41), the right side of the sleeve plate (42) is fixedly connected to the spring (40), the right end of the spring (40) is fixedly connected to the mounting plate (26), the sleeve plate (42) is fixedly connected to the second sliding plate (38), a push plate (56) is fixedly connected to the rear side of the second sliding plate (38), an L-shaped connecting member (39) is fixedly connected to the front side of the mounting plate (26), a fixing member (35) is fixedly connected to the horizontal side of the L-shaped connecting member (39), a driven gear (36) is rotatably connected to the front side of the fixing member (35) through a bearing, a lead screw (37) penetrates through the center of the driven gear (36) and is fixedly connected thereto, an L-shaped translation plate (33) is meshed with the outer side of the lead screw (37) near the rear end, two limiting rods (34) are fixedly connected to the rear side of the fixing member (35), the two limiting rods (34) are symmetrically arranged left and right, the rear ends of the two limiting rods (34) both penetrate through the inner cavity of the L-shaped translation plate (33), a cutting machine (32) is installed on the top of the L-shaped translation plate (33), a cutting wheel (31) is installed at the rear side of the cutting machine (32), two side plates (44) are fixedly connected to the right side of the mounting plate (26), the two side plates (44) are symmetrically arranged up and down, and the right sides of the two side plates (44) are both fixedly connected to a circular plate (1).

2. The pipe inner plastic-lined composite layer trimming device according to claim 1, characterized in that: The front side of the L-shaped fixing plate (9) is fixedly connected with an L-shaped mounting plate (10). The vertical side of the L-shaped mounting plate (10) is fixedly connected with a driving motor (19). The power output shaft of the driving motor (19) is fixedly connected with a driving bevel gear (18). The driving bevel gear (18) is meshed with driven bevel gears (17) on both the left and right sides. One end of each of the two driven bevel gears (17) facing away from each other is fixedly connected with a cross bar (15). One end of each of the two cross bars (15) facing away from each other is fixedly connected with a side bevel gear (14). The rear sides of the two side bevel gears (14) are both meshed with a transmission bevel gear (24). A rotating shaft penetrates through the inner cavity of each of the two transmission bevel gears (24) and is fixedly connected thereto. The front end of the rotating shaft is fixedly connected with a driving gear (25). The driving gear (25) and the driven gear (36) are meshed with each other.

3. The pipe inner lining plastic composite layer trimming device according to claim 2, wherein: The left end of the middle rod (51) is fixedly connected with a cylinder (22). The outside of the cylinder (22) is sleeved with a support plate (13).

4. A steel pipe inner plastic lining composite layer trimming device according to claim 3, characterized in that: The outside of the rotating shaft on the right side is sleeved with a vertical plate (20). The outside of the rotating shaft on the left side is sleeved with an L-shaped welding plate (23). The left and right sides of the L-shaped mounting plate (10) are both fixedly connected with linkage plates (16). One side of each of the two linkage plates (16) corresponding to each other is fixedly connected with an L-shaped connecting plate (12). The L-shaped welding plate (23) and the vertical plate (20) are both fixedly connected with the adjacent L-shaped connecting plate (12).

5. The usage method of a pipe inner lining plastic composite layer trimming device according to claim 4, characterized in that Comprising the following steps: S1: When the cylinder (22) is started, it can drive the middle rod (51) to move. When the middle rod (51) moves, it can drive the movable tube (46) to move. When the movable tube (46) moves, several cranks (50) can drive the third hinge plate (53) to move. At the same time, when the third hinge plate (53) on the right side is in contact with the annular opening, the movement track of the arc-shaped plate (27) can be limited. When several arc-shaped plates (27) are expanded, the lined plastic steel pipe (11) can be supported. S2: Subsequently, the staff pulls out the telescopic rod (7) to make the two support plates (13) fit with both ends of the lined plastic steel pipe (11). Subsequently, the swing plate (55) is flipped so that the insertion rod (54) is inserted into the inner cavity of the insertion hole to complete the fixation of the position of the telescopic rod (7). S3: When the plastic-lined pipe section (21) inside the plastic-lined steel pipe (11) extends out, it can push the push plate (56) to move. When the push plate (56) moves, it can drive the second sliding plate (38) to move. When the second sliding plate (38) moves to the right, the bottom of the reciprocating plate (30) can contact the abutting rod (43). At this time, the reciprocating plate (30) can move upward along the second chute, ejecting the fitting rod (45). When the fitting rod (45) moves upward, the trigger switch can be activated. When the trigger switch is activated, the driving motor (19) can be started. When the driving motor (19) is started, the driving bevel gear (18) can be driven to rotate through the power output shaft. When the driving bevel gear (18) rotates, it can drive the two driven bevel gears (17) to rotate. When the two driven bevel gears (17) rotate, they can drive the adjacent cross bar (15) to rotate. When the cross bar (15) rotates, it can drive the side bevel gear (14) to rotate. When the side bevel gear (14) rotates, it can drive the transmission bevel gear (24) to rotate. When the transmission bevel gear (24) rotates, it can drive the rotating shaft to rotate. When the rotating shaft rotates, it can drive the driving gear (25) to rotate. When the driving gear (25) rotates, it can drive the driven gear (36) to rotate. When the driven gear (36) rotates, it can drive the lead screw (37) to rotate. When the lead screw (37) rotates, the L-shaped translation plate (33) can be moved, thereby driving the cutting machine (32) to move. When the cutting machine (32) moves, the plastic-lined pipe sections (21) at both ends of the plastic-lined steel pipe (11) can be cut through the cutting wheel (31).

Images