Flaring device for engineering plastic pipeline construction

Abstract

The invention provides a flaring device for engineering plastic pipeline construction, and relates to the technical field of plastic pipeline machining, the flaring device comprises a base, a heating column is arranged on the base, a plurality of first grooves are formed in the heating column, a shaping assembly is arranged in each first groove, a first through groove is formed in each shaping assembly, and a second through groove is formed in each first through groove; two sliding rails are fixedly arranged on one side of the base, a pipeline clamp is slidably arranged on the sliding rails, a first rack is arranged between the pipeline clamp and the shaping assembly, a connecting column is fixedly arranged on the side, close to the shaping assembly, of the pipeline clamp, and a clamping groove is formed in the side, away from the pipeline clamp, of the connecting column. The hot melt part of the plastic pipeline is prevented from deforming in the cooling separation period, and the flaring forming efficiency of the plastic pipeline is improved in an accelerated cooling mode.

Description

Technical Field

[0001] The invention relates to the technical field of plastic pipe processing, in particular to a port expanding device for construction of engineering plastic pipes. Background Art

[0002] Plastic pipes are pipes made of plastic materials, mainly composed of polymer compounds, with plasticity and fluidity. They are widely used in many fields such as tap water piping and drainage systems. They have the advantages of corrosion resistance, good softness, smooth inner wall and low resistance. During the construction process of plastic pipes, it is necessary to use an expansion device to heat the pipe head and apply pressure to gradually expand it into the desired shape to facilitate subsequent construction.

[0003] As disclosed in a Chinese patent: A plastic pipe expanding device, application number: CN202320919101.3, includes a base plate, a support column is installed at the lower end of the base plate, a fixed plate is installed on the side of the base plate, a motor 1 is installed on the side of the fixed plate, a sub-gear is installed on the output end of the motor 1, a main gear is meshingly installed on the side of the sub-gear, a fixed disk is installed on the side of the main gear, a connecting column is installed on the side of the fixed disk, the other end of the connecting column is located inside the fixed plate and is rotatably connected with a movable ring, a connecting spring is installed on the side of the movable ring, a heating plate is installed on the side of the connecting spring, and a clamping device spacing adjustment mechanism is installed inside the base plate. By setting up a clamping device displacement adjustment mechanism, the mechanism can facilitate the clamping and fixing of plastic pipes of different lengths, and at the same time, plastic pipes of different lengths can be expanded to improve the practicality of the device.

[0004] However, in the above technical scheme, when the plastic pipe is expanded by heating using the expanding device, the head of the plastic pipe needs to be first contacted with the expanding device for expansion by heating, and then the body of the plastic pipe is gradually contacted with the expanding device for expansion by heating, thereby completing the expansion of the entire plastic pipe. This results in the head of the plastic pipe being in contact with the expanding device for a significantly longer time, which makes it very easy for the head of the plastic pipe to soften over a larger range and a higher degree of softening due to excessive heating time, making it difficult to maintain its own shape, resulting in the head of the plastic pipe being very easy to deform after leaving the expanding device, thereby affecting subsequent construction. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a expanding device for construction of engineering plastic pipes, which can effectively solve the problems in the background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a flaring device for engineering plastic pipe construction, comprising a base, a heating column is arranged on the base, a plurality of first grooves are arranged on the heating column, a shaping component is arranged in the first groove, a first through groove is arranged on the shaping component, two slide rails are fixedly arranged on one side of the base, a pipe clamp is slidably arranged on the slide rail, a first rack is arranged between the pipe clamp and the shaping component, a connecting column is fixedly arranged on the side of the pipe clamp close to the shaping component, and a card slot is arranged on the side of the connecting column away from the pipe clamp.

[0007] Preferably, the first rack is fixedly connected to the base.

[0008] Preferably, the shaping component includes a component base, a second through groove and a plurality of slide grooves are provided on the component base, a first slider and a second slider are slidably provided in the slide grooves, a shaping outer sleeve and a shaping inner support plate are fixedly provided on the first slider and the second slider respectively, a slot is provided on the lower side of the component base, two clips are provided in the slot, a worm gear is rotatably provided on one side of the component base, a plurality of first guide slide grooves and a plurality of second guide slide grooves are obliquely provided on the worm gear, a first guide slide column and a second guide slide column are movably provided in the first guide slide groove and the second guide slide groove respectively, a worm is meshed with one side of the worm wheel, a first rotating column is provided on the worm, and a first gear is provided on the first rotating column.

[0009] Preferably, the component base is slidably connected to the base, the first slider is rotatably connected to the first guide slide column, the second slider is rotatably connected to the second guide slide column, the shaped inner support plate is located in the first groove, the inclination direction of the first guide slide groove is opposite to the inclination direction of the second guide slide groove, the first gear is located in the first through groove, and the heating column passes through the second through groove.

[0010] Preferably, the shaped inner support plate includes an inner support plate base, a cooling oil circulation groove is provided on the inner support plate base, a telescopic oil inlet pipe and a telescopic oil outlet pipe are provided on one side of the cooling oil circulation groove, the shaped inner support plate is provided with an oil cooler on the component base, the oil cooler is provided with an oil pump, the telescopic oil inlet pipe is connected to the oil pump, and the telescopic oil outlet pipe is connected to the oil cooler.

[0011] Preferably, the structure of the shaped outer sleeve is the same as that of the shaped inner support plate except for the shape.

[0012] Preferably, the buckle is rotatably provided with a second rotating column in the component base, the second rotating column is provided with a second gear and a third gear, a second rack is meshed with one side of the second gear, a button is fixedly provided on the side of the second rack close to the slide rail, a third rack is meshed with one side of the third gear, a spring is fixedly provided on one side of the third rack, a push plate is provided on the side of the third rack away from the spring, a wedge-shaped block is fixedly provided on one side of the push plate, and a part of the wedge-shaped block is located in the slot.

[0013] Preferably, a portion of the button is located outside the component base, the spring is fixedly mounted on the component base, and the wedge-shaped block is slidably connected to the component base.

[0014] Preferably, the pipe clamp includes a clamp base, a second groove is provided on the clamp base, a hydraulic rod is fixedly installed on the inner wall surface on one side above the second groove, a lifting plate is provided on the hydraulic rod, a plurality of clamping rollers are provided on the second groove on the lifting plate, and a motor is provided on any of the clamping rollers.

[0015] Preferably, the motor is fixedly mounted on the fixture base.

[0016] The present invention provides a flaring device for engineering plastic pipe construction, which has the following beneficial effects: The present invention firstly clamps the plastic pipe by the pipe clamp and makes the plastic pipe rotate continuously, then moves the plastic pipe toward the heating column by the pipe clamp, heats and expands the plastic pipe by the heating column, in this process, the connecting column is fixedly connected with the shaping component by the clamping groove, after the expansion of the plastic pipe is completed, the hot-melt part of the plastic pipe is separated from the heating column by the pipe clamp, and at the same time, the pipe clamp drives the shaping component to move by the connecting column, so that the shaping component moves with the hot-melt part of the plastic pipe, and the hot-melt part of the plastic pipe is shaped and accelerated cooled by the shaping component, when the shaping component moves to the first rack, the shaping component is separated from the hot-melt part of the plastic pipe, and the pipe clamp continues to drive the shaping component to move, so that the shaping component is fitted with the slide rail, the fixed connection between the connecting column and the shaping component is released, and the shaping component stops moving, and then the hot-melt part of the plastic pipe can be taken out from the shaping component by the moving pipe clamp, the expansion of the plastic pipe is completed, the hot-melt part of the plastic pipe is prevented from being deformed during the separation and cooling period, and the efficiency of the expansion of the plastic pipe is improved by accelerating the cooling.

[0017] Among them, when the component base moves to the first rack, the first gear is rotated through the first rack, the first gear drives the worm to rotate through the first rotating column, the worm drives the worm wheel to rotate, and the worm wheel drives the first guide slide column and the second guide slide column to move respectively through the first guide slot and the second guide slot, the first guide slide column and the second guide slide column drive the first slider and the second slider to move respectively, and then the first slider and the second slider drive the shaping outer sleeve and the shaping inner support plate to move respectively, so that the shaping outer sleeve and the shaping inner support plate move away from each other, thereby separating the shaping outer sleeve and the shaping inner support plate from the plastic pipe, which is convenient for the subsequent removal of the plastic pipe from between the shaping outer sleeve and the shaping inner support plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 For the present invention Figure 1 A schematic diagram of the enlarged structure at point A; Figure 3 It is a structural schematic diagram of the shaping component in the present invention; Figure 4 It is a rear view schematic diagram of the internal structure of the shaping component in the present invention; Figure 5 It is a structural schematic diagram of the shaped inner support plate in the present invention; Figure 6 It is a schematic diagram of the structure of the buckle in the present invention; Figure 7 It is a schematic diagram of the structure of the pipe clamp in the present invention.

[0019] Among them, 1, base; 2, heating column; 3, first groove; 4, shaping component; 401, component base; 402, slide groove; 403, first slider; 404, second slider; 405, shaping jacket; 406, shaping inner support plate; 40601, inner support plate base; 40602, cooling oil circulation groove; 40603, telescopic oil inlet pipe; 40604, telescopic oil outlet pipe; 40605, oil cooler; 40606, oil pump; 407, slot; 408, buckle; 40801, second rotating column; 40802, second gear; 40803, third gear; 40804, second rack; 40805, button; 40 806, third rack; 40807, spring; 40808, push plate; 40809, wedge-shaped block; 409, worm gear; 4010, first guide slot; 4011, second guide slot; 4012, first guide slide column; 4013, second guide slide column; 4014, worm; 4015, first rotating column; 4016, first gear; 4017, second through slot; 5, first through slot; 6, slide rail; 7, pipe clamp; 701, clamp base; 702, second groove; 703, hydraulic rod; 704, lifting plate; 705, clamping roller; 706, motor; 8, first rack; 9, connecting column; 10, slot. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] like Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a flaring device for engineering plastic pipe construction, including a base 1, a heating column 2 is provided on the base 1, a plurality of first grooves 3 are provided on the heating column 2, a shaping component 4 is provided in the first groove 3, a first through groove 5 is provided on the shaping component 4, two slide rails 6 are fixedly provided on one side of the base 1, a pipe clamp 7 is slidably provided on the slide rail 6, a first rack 8 is provided between the pipe clamp 7 and the shaping component 4, a connecting column 9 is fixedly provided on the side of the pipe clamp 7 close to the shaping component 4, and a card slot 10 is provided on the side of the connecting column 9 away from the pipe clamp 7.

[0022] like Figure 3 and Figure 4As shown, the shaping component 4 includes a component base 401, on which a second through slot 4017 and a plurality of slide slots 402 are provided, in which a first slider 403 and a second slider 404 are slidably provided, and a shaping outer sleeve 405 and a shaping inner support plate 406 are fixedly provided on the first slider 403 and the second slider 404, respectively, and a slot 407 is provided on one side below the component base 401, and two buckles 408 are provided in the slot 407, and the component base 401 A worm wheel 409 is rotatably arranged on one side, and a plurality of first guide slots 4010 and a plurality of second guide slots 4011 are obliquely arranged on the worm wheel 409, and a first guide slide column 4012 and a second guide slide column 4013 are movably arranged in the first guide slot 4010 and the second guide slot 4011 respectively, and a worm 4014 is meshingly arranged on one side of the worm wheel 409, and a first rotating column 4015 is arranged on the worm 4014, and a first gear 4016 is arranged on the first rotating column 4015.

[0023] Through the above technical scheme, when it is necessary to expand the plastic pipe, the pipe clamp 7 is used to move the plastic pipe toward the heating column 2 in a rotating state, and the heating column 2 is used to heat and expand the plastic pipe. During this process, the connecting column 9 moves with the pipe clamp 7, so that the slot 10 on the connecting column 9 enters the slot 407, and a part of the buckle 408 enters the slot 10, thereby fixing the connecting column 9 with the component base 401. When the expansion of the plastic pipe is completed, the plastic pipe is separated from the heating column 2 by the pipe clamp 7, and the pipe clamp 7 drives the component base 401 to move through the connecting column 9, and the component base 401 drives the shaping jacket 405 and the shaping inner support plate 406 to move, so that the shaping jacket 405 and the shaping inner support plate 406 move with the hot-melt part of the plastic pipe, and the shaping jacket 405 and the shaping inner support plate 406 are used to shape and accelerate the cooling of the hot-melt part of the plastic pipe in the rotating state, so as to prevent the hot-melt part of the plastic pipe from being deformed during the separation and cooling period; When the assembly base 401 moves to the first rack 8, the first rack 8 meshes with the first gear 4016 in the first through slot 5, and the first gear 4016 rotates through the first rack 8. The first gear 4016 drives the worm 4014 to rotate through the first rotating column 4015, and the worm 4014 drives the worm wheel 409 to rotate. The worm wheel 409 drives the first guide slide post 4012 and the second guide slide post 4013 to move through the first guide slot 4010 and the second guide slot 4011, respectively, so that the first guide slide post 4012 and the second guide slide post 4013 move along the first guide slot 4010 and the second guide slot 4011, respectively. 011, the first guide slide post 4012 and the second guide slide post 4013 respectively drive the first slider 403 and the second slider 404 to move, the first slider 403 and the second slider 404 move along the track of the slide groove 402, and then the first slider 403 and the second slider 404 respectively drive the shaping jacket 405 and the shaping inner support plate 406 to move, so that the shaping jacket 405 and the shaping inner support plate 406 move away from each other, so that the shaping jacket 405 and the shaping inner support plate 406 are separated from the plastic pipe, which is convenient for the subsequent removal of the plastic pipe from between the shaping jacket 405 and the shaping inner support plate 406; Then, the assembly base 401 continues to move, and the designated part of the buckle 408 contacts the slide rail 6, so that the part of the buckle 408 is squeezed by the slide rail 6, so that a part of the buckle 408 leaves the inside of the card slot 10, and the fixed connection between the connecting column 9 and the assembly base 401 is released. The assembly base 401 stops moving, and then the plastic pipe can be pulled out from between the shaping outer sleeve 405 and the shaping inner support plate 406 by the moving pipe clamp 7, and the plastic pipe expansion is completed; The plastic pipe is then removed from the pipe clamp 7, and the component base 401 can be returned to its original position through the pipe clamp 7 and the connecting column 9, and other components can be returned to their original positions together. Then the staff presses the designated part of the buckle 408 to release the fixed connection between the connecting column 9 and the component base 401, and the pipe clamp 7 can be returned to its original position for the next expansion.

[0024] like Figure 5 As shown, the shaped inner support plate 406 includes an inner support plate base 40601, a cooling oil circulation groove 40602 is arranged on the inner support plate base 40601, a telescopic oil inlet pipe 40603 and a telescopic oil outlet pipe 40604 are arranged on one side of the cooling oil circulation groove 40602, the shaped inner support plate 406 is provided with an oil cooler 40605 on the component base 401, an oil pump 40606 is arranged on the oil cooler 40605, the telescopic oil inlet pipe 40603 is connected to the oil pump 40606, and the telescopic oil outlet pipe 40604 is connected to the oil cooler 40605.

[0025] Through the above technical scheme, when it is necessary to accelerate the cooling of the hot melt part of the plastic pipe, the cooling oil in the oil cooler 40605 is input into the telescopic oil inlet pipe 40603 through the oil pump 40606, and then the cooling oil is input into the cooling oil circulation groove 40602 through the telescopic oil inlet pipe 40603, so as to reduce the temperature of the inner support plate base 40601, thereby accelerating the cooling of the hot melt part of the plastic pipe through the inner support plate base 40601, and at the same time, the higher temperature cooling oil in the cooling oil circulation groove 40602 enters the oil cooler 40605 through the telescopic oil outlet pipe 40604, and the higher temperature cooling oil is cooled by the oil cooler 40605 to achieve circulation, thereby continuously accelerating the cooling of the hot melt part of the plastic pipe.

[0026] like Figure 6 As shown, the buckle 408 is rotatably provided with a second rotating column 40801 in the component base 401, and the second rotating column 40801 is provided with a second gear 40802 and a third gear 40803, and the second gear 40802 is meshed with a second rack 40804 on one side, and a button 40805 is fixedly provided on the side of the second rack 40804 close to the slide rail 6, and the third gear 40803 is meshed with a third rack 40806 on one side, and a spring 40807 is fixedly provided on one side of the third rack 40806, and a push plate 40808 is provided on the side of the third rack 40806 away from the spring 40807, and a wedge-shaped block 40809 is fixedly provided on one side of the push plate 40808, and a part of the wedge-shaped block 40809 is located in the slot 407.

[0027] Through the above technical solution, when the connecting column 9 enters the slot 407, the connecting column 9 squeezes the inclined surface of the wedge-shaped block 40809, so that the wedge-shaped block 40809 moves toward the push plate 40808, and the spring 40807 is deformed. When the card slot 10 reaches the wedge-shaped block 40809, the connecting column 9 no longer squeezes the inclined surface of the wedge-shaped block 40809, and the spring 40807 rebounds, so that a part of the wedge-shaped block 40809 enters the card slot 10, thereby fixing the connecting column 9 to the component base 401 through the buckle 408. When it is necessary to release the fixed connection between the connecting column 9 and the component base 401 When the button 40805 is pressed by the slide rail 6 or the staff, the button 40805 drives the second gear 40802 to rotate through the second rack 40804, the second gear 40802 drives the third gear 40803 to rotate through the second rotating column 40801, and the third rack 40806 is moved toward the spring 40807 through the third gear 40803, and the third rack 40806 drives the wedge block 40809 to move through the push plate 40808, so that the wedge block 40809 leaves the inside of the slot 10, thereby releasing the fixed connection between the connecting column 9 and the component base 401.

[0028] like Figure 7 As shown, the pipe clamp 7 includes a clamp base 701, a second groove 702 is provided on the clamp base 701, a hydraulic rod 703 is fixedly installed on the inner wall surface on one side above the second groove 702, a lifting plate 704 is provided on the hydraulic rod 703, and a plurality of clamping rollers 705 are provided on the second groove 702 on the lifting plate 704, and a motor 706 is provided on any of the clamping rollers 705.

[0029] Through the above technical solution, when the plastic pipe needs to be clamped, the plastic pipe is first placed under the lifting plate 704, and then the lifting plate 704 is moved toward the plastic pipe by the hydraulic rod 703, so that the plastic pipe is clamped by a plurality of clamping rollers 705, and then the clamping rollers 705 are rotated by the motor 706, and the plastic pipe is rotated by the clamping rollers 705, so as to facilitate uniform heating of the plastic pipe and facilitate expansion of the plastic pipe.

[0030] Working principle: The present invention firstly clamps the plastic pipe by the pipe clamp 7 and makes the plastic pipe rotate continuously, then moves the plastic pipe toward the heating column 2 by the pipe clamp 7, and heats and expands the plastic pipe by the heating column 2. In this process, the connecting column 9 is fixedly connected with the shaping component 4 by the clamping groove 10. After the expansion of the plastic pipe is completed, the hot-melt part of the plastic pipe is separated from the heating column 2 by the pipe clamp 7, and at the same time, the pipe clamp 7 drives the shaping component 4 to move by the connecting column 9, so that the shaping component 4 moves with the hot-melt part of the plastic pipe, and the hot-melt part of the plastic pipe is heated by the shaping component 4. The shaping and accelerated cooling are performed separately. When the shaping component 4 moves to the first rack 8, the shaping component 4 is separated from the hot-melt part of the plastic pipe, and the pipe clamp 7 continues to drive the shaping component 4 to move, so that the shaping component 4 fits with the slide rail 6, and the fixed connection between the connecting column 9 and the shaping component 4 is released. The shaping component 4 stops moving, and then the hot-melt part of the plastic pipe can be taken out of the shaping component 4 by the moving pipe clamp 7 to complete the expansion of the plastic pipe, prevent the hot-melt part of the plastic pipe from deformation during the separation and cooling period, and improve the efficiency of the plastic pipe expansion forming by accelerating the cooling.

[0031] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present invention are still within the protection scope of the present invention.

Claims

1. A flaring device for engineering plastic pipe construction, comprising a base (1), characterized in that: The base (1) is provided with a heating column (2), the heating column (2) is provided with a plurality of first grooves (3), a shaping component (4) is provided in the first groove (3), the shaping component (4) is provided with a first through groove (5), two slide rails (6) are fixedly provided on one side of the base (1), a pipe clamp (7) is slidably provided on the slide rail (6), a first rack (8) is provided between the pipe clamp (7) and the shaping component (4), a connecting column (9) is fixedly provided on a side of the pipe clamp (7) close to the shaping component (4), and a clamping groove (10) is provided on a side of the connecting column (9) away from the pipe clamp (7).

2. The expansion device for engineering plastic pipe construction according to claim 1, characterized in that: The first rack (8) is fixedly connected to the base (1).

3. The expansion device for engineering plastic pipe construction according to claim 2, characterized in that: The shaping component (4) comprises a component base (401), the component base (401) is provided with a second through slot (4017) and a plurality of slide slots (402), a first slider (403) and a second slider (404) are slidably arranged in the slide slots (402), a shaping outer sleeve (405) and a shaping inner support plate (406) are fixedly arranged on the first slider (403) and the second slider (404), a slot (407) is provided on one side below the component base (401), two buckles (408) are arranged in the slot (407), and the component base (401) is provided with a plurality of through slots (4017) and a plurality of slide slots (402). ) is rotatably arranged on one side of a worm wheel (409), a plurality of first guide slots (4010) and a plurality of second guide slots (4011) are obliquely arranged on the worm wheel (409), a first guide slide post (4012) and a second guide slide post (4013) are movably arranged in the first guide slot (4010) and the second guide slot (4011), a worm (4014) is meshingly arranged on one side of the worm wheel (409), a first rotating post (4015) is arranged on the worm (4014), and a first gear (4016) is arranged on the first rotating post (4015).

4. The expansion device for engineering plastic pipe construction according to claim 3, characterized in that: The component base (401) is slidably connected to the base (1), the first slider (403) is rotationally connected to the first guide slider (4012), the second slider (404) is rotationally connected to the second guide slider (4013), the shaped inner support plate (406) is located in the first groove (3), the inclination direction of the first guide slide groove (4010) is opposite to the inclination direction of the second guide slide groove (4011), the first gear (4016) is located in the first through groove (5), and the heating column (2) passes through the second through groove (4017).

5. The expansion device for engineering plastic pipe construction according to claim 4, characterized in that: The shaped inner support plate (406) comprises an inner support plate base (40601), a cooling oil circulation groove (40602) is arranged on the inner support plate base (40601), a telescopic oil inlet pipe (40603) and a telescopic oil outlet pipe (40604) are arranged on one side of the cooling oil circulation groove (40602), the shaped inner support plate (406) is provided with an oil cooler (40605) on the component base (401), an oil pump (40606) is arranged on the oil cooler (40605), the telescopic oil inlet pipe (40603) is connected to the oil pump (40606), and the telescopic oil outlet pipe (40604) is connected to the oil cooler (40605).

6. The expansion device for engineering plastic pipe construction according to claim 5, characterized in that: The structure of the shaped outer sleeve (405) is the same as that of the shaped inner support plate (406) except for the shape.

7. The expansion device for engineering plastic pipe construction according to claim 6, characterized in that: The buckle (408) is rotatably provided with a second rotating column (40801) in the component base (401), and the second rotating column (40801) is provided with a second gear (40802) and a third gear (40803), a second rack (40804) is meshedly provided on one side of the second gear (40802), a button (40805) is fixedly provided on the side of the second rack (40804) close to the slide rail (6), a third rack (40806) is meshedly provided on one side of the third gear (40803), a spring (40807) is fixedly provided on one side of the third rack (40806), a push plate (40808) is provided on the side of the third rack (40806) away from the spring (40807), a wedge-shaped block (40809) is fixedly provided on one side of the push plate (40808), and a portion of the wedge-shaped block (40809) is located in the slot (407).

8. The expansion device for engineering plastic pipe construction according to claim 7, characterized in that: A portion of the button (40805) is located outside the component base (401), the spring (40807) is fixedly mounted on the component base (401), and the wedge-shaped block (40809) is slidably connected to the component base (401).

9. The expansion device for engineering plastic pipe construction according to claim 8, characterized in that: The pipe clamp (7) comprises a clamp base (701), a second groove (702) is provided on the clamp base (701), a hydraulic rod (703) is fixedly mounted on the inner wall surface on one side above the second groove (702), a lifting plate (704) is provided on the hydraulic rod (703), a plurality of clamping rollers (705) are provided on the second groove (702) on the lifting plate (704), and a motor (706) is provided on any of the clamping rollers (705).

10. The expansion device for engineering plastic pipe construction according to claim 9, characterized in that: The motor (706) is fixedly mounted on the fixture base (701).

Images