Double-wall corrugated pipe cutting device

Abstract

The present invention discloses a double-wall corrugated pipe cutting device, which relates to the technical field of corrugated pipe cutting. The device comprises a support frame, a pushing device and an adjusting device, wherein a circular frame is fixedly mounted on the surface of the support frame, a movable frame is slidably mounted on the surface of the support frame, a mounting plate is slidably mounted inside the movable frame, and a cutter is fixedly mounted on the bottom of the mounting plate; wherein the pushing device comprises a fixed plate, a slide plate, a driving device, an umbrella wheel, an electric push rod, a limit plate, a pushing rod, an L-shaped rod and a trapezoidal block, the pushing rod pushes the limit plate to move upward, and the upward movement of the limit plate restricts the rotation of the umbrella wheel, the fixed plate is fixedly mounted on the surface of the circular frame, the slide plate is slidably mounted on the top of the fixed plate, and the driving device is slidably mounted on the top of the slide plate to prevent excessive squeezing force on the corrugated pipe, which causes the corrugated pipe to deform and affect the cutting effect.

Description

Technical Field

[0001] The invention relates to the technical field of corrugated pipe cutting, in particular to a double-wall corrugated pipe cutting device. Background Art

[0002] Double-wall corrugated pipe is a pipe made of two layers of metal pipe wall connected by corrugations. It is usually used to cut and process metal or plastic corrugated pipes to meet specific size and shape requirements.

[0003] The patent with patent announcement number CN217751668U relates to a multifunctional double-wall corrugated pipe cutting device, including a base plate, two groups of square plates are installed on the upper surface of the base plate, and the outer sides of the two groups of square plates are penetrated with circular placement holes, and the outer sides of the square plates are provided with a limiting mechanism, and vertical plates are installed near the two sides of the upper surface of the base plate, and the outer sides of the vertical plates are penetrated with vertical grooves, and sliders are provided inside the vertical grooves. Blades are provided between the two groups of sliders, and a connecting mechanism is provided between the blades and the sliders. An electric telescopic rod is installed between the upper surface of the slider and the top of the vertical groove; this multifunctional double-wall corrugated pipe cutting device can fix the position of the double-wall corrugated pipe well inside the circular placement hole by setting a limiting mechanism, to prevent it from moving during cutting, affecting the cutting effect, and to facilitate the staff to replace the blade damaged by long-term use.

[0004] In the above patent, by setting a limiting mechanism, the position of the double-wall corrugated tube can be well fixed inside the circular placement hole to prevent it from moving during cutting, affecting the cutting effect, and making it convenient for staff to replace the blade damaged by long-term use. However, due to the grooves provided on the outer wall of the corrugated tube, it is difficult to move the corrugated tube. At the same time, the corrugated tube has a certain elasticity. Excessive restriction of the corrugated tube will cause the corrugated tube to deform, which will cause the cutting position of the corrugated tube to deform and affect the cutting effect. Summary of the Invention

[0005] In view of the deficiencies in the prior art, the present invention provides a double-wall corrugated pipe cutting device, which solves the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a double-wall corrugated pipe cutting device, including a support frame, a pushing device and an adjusting device, wherein a circular frame is fixedly installed on the surface of the support frame, a movable frame is slidably installed on the surface of the support frame, a mounting plate is slidably installed inside the movable frame, and a cutter is fixedly installed on the bottom of the mounting plate; wherein the pushing device includes a fixed plate, a slide plate, a driving device, an umbrella wheel, an electric push rod, a limit plate, a pushing rod, an L-shaped rod and a trapezoidal block, the pushing rod will push the limit plate to move upward, and the upward movement of the limit plate will limit the rotation of the umbrella wheel, and the fixed plate The fixed plate is fixedly mounted on the surface of the circular frame, the slide is slidably mounted on the top of the fixed plate, the driving device is slidably mounted on the top of the slide, the umbrella-shaped wheel is fixedly mounted on the output end of the driving device, the electric push rod is fixedly mounted on the top of the fixed plate, the slide and the output end of the electric push rod are fixed, the limiting plate is slidably mounted on the surface of the slide, one end of the pushing rod is hinged to the limiting plate, the other end of the pushing rod is hinged to the driving device, the L-shaped rod is fixedly mounted on the bottom of the limiting plate, and the trapezoidal block slides through the L-shaped rod to prevent excessive extrusion force on the corrugated tube from causing deformation of the corrugated tube and affecting the cutting effect.

[0007] According to the above technical solution, a No. 1 spring is arranged between the driving device and the slide, and the No. 1 spring can drive the driving device to reset. A No. 2 spring is arranged between the trapezoidal block and the L-shaped rod, and the No. 2 spring can drive the trapezoidal block to reset.

[0008] According to the above technical solution, the adjusting device includes a fixed frame, a movable frame, a concave wheel and a bolt. The movement of the concave wheel will adjust the height of the corrugated pipe inside the circular frame. The fixed frame is fixedly installed inside the circular frame, the movable frame is slidably installed inside the fixed frame, the concave wheel is rotatably installed inside the movable frame, the bolt is threadedly connected to the fixed frame, and the bolt is rotatably installed at the bottom of the movable frame. The corrugated pipe can be supported by the movable frame and the concave wheel, so that the inside of the circular frame can accommodate corrugated pipes of different diameters.

[0009] According to the above technical solution, a movable plate is slidably passed through the inner and outer walls of the circular frame, an elastic frame is fixedly installed on the surface of the movable plate, and a push plate is fixedly installed on the surface of the movable frame. When the push plate moves, the movable plate and the elastic frame will move. A No. 3 spring is arranged between the movable plate and the circular frame to prevent the two sides of the bellows from deforming toward the edges when the bellows is cut and squeezed.

[0010] According to the above technical solution, it also includes a limiting device and a grinding device, the surface of the movable plate is provided with a limiting device, the limiting device includes a sliding rod, an inclined plate, a linkage plate and an elastic rod, the sliding rod slides through the movable plate, the inclined plate is slidably installed on the surface of the movable plate, the linkage plate is slidably installed on the top of the movable plate, a return spring is provided between the linkage plate and the movable plate, and the elastic rod is fixedly installed on the surface of the linkage plate through the return spring to drive the linkage plate to move in the direction of the support frame, and when the linkage plate moves, it drives the elastic rod to move, so that the movement of the movable frame will hit the elastic rod to produce an abnormal sound, indicating that the cutter needs to be replaced.

[0011] According to the above technical solution, an inclined panel is slidably installed on the surface of the support frame, an extrusion rod is fixedly installed on the surface of the elastic rod, a positioning block is slidably installed on the surface of the support frame, a No. 4 spring is arranged between the positioning block and the support frame, and a slot is provided on the top of the positioning block. When the extrusion rod moves, it pushes the inclined panel to move upward. When the inclined panel moves upward, it will disengage from the positioning block slot, and the positioning block will limit the cutter from moving downward next time.

[0012] According to the above technical solution, the grinding device includes a slider and a friction block. When the friction block moves downward, it will fit into the surface of the corrugated pipe, and the cutting position of the corrugated pipe can be ground by the friction block. A slide groove is provided on the surface of the mounting plate, and the slider is slidably installed inside the slide groove. A No. 5 spring is provided between the slider and the slide groove. The friction block is rotatably installed on the surface of the slider, and a torsion spring is provided between the friction block and the slider. A vibration motor is provided between the movable frame and the mounting plate. The vibration motor will drive the mounting plate to move back and forth inside the movable frame, thereby improving the effect of the cutter cutting the corrugated pipe. At the same time, the mounting plate will drive the friction block to vibrate to improve the grinding effect and remove the burrs on the outer wall of the corrugated pipe.

[0013] According to the above technical solution, a rotating shaft and a contact wheel are rotatably installed on the surface of the friction block, a sleeve block is slidably installed on the surface of the rotating shaft, a rubber wheel is rotatably installed on the surface of the sleeve block, a protrusion is fixedly installed on the surface of the contact wheel, and a vibration plate is fixedly installed on the surface of the friction block. The rubber wheel will rotate when it moves on the surface of the bellows, and when the rubber wheel rotates, it will drive the contact wheel to rotate, and when the contact wheel rotates, it will drive the protrusion to rotate. When the protrusion rotates, it will hit the vibration plate and drive the friction block to vibrate, thereby avoiding the waste residue generated by grinding being between the bellows and the friction block and affecting the grinding effect.

[0014] The present invention provides a double-wall corrugated pipe cutting device. It has the following beneficial effects:

[0015] (1) In this invention, the electric push rod pushes the slide plate and the umbrella wheel to move, so that the umbrella wheel fits on the surface of the corrugated tube. The umbrella wheel is inserted into the groove on the surface of the corrugated tube, so that the umbrella wheel pushes the corrugated tube to move when it rotates, thereby preventing the groove on the surface of the corrugated tube from affecting the movement of the corrugated tube. At the same time, when the squeezing force of the umbrella wheel on the corrugated tube is too large, the driving device will slide on the slide plate, so that the push rod will push the limit plate to move upward to limit the rotation of the umbrella wheel. At the same time, the trapezoidal block will limit the movement of the slide plate, thereby preventing the squeezing force on the corrugated tube from being too large, causing the corrugated tube to deform and affect the cutting effect.

[0016] (2) This invention pushes the movable frame and the concave wheel to move by rotating the bolt, and the movable frame and the concave wheel can support the corrugated tube, so that the inside of the circular frame can accommodate corrugated tubes of different diameters. When the movable frame moves, it drives the push plate to move, and the push plate drives the movable plate to move. The elastic plate can support the corrugated tube, preventing the two sides of the corrugated tube from deforming toward the edges when the corrugated tube is cut and squeezed.

[0017] (3) In this invention, when the cutter is excessively worn and not sharp enough, the cutter will squeeze the corrugated tube to produce a greater deformation when cutting the corrugated tube. When the corrugated tube is excessively deformed, it will push the elastic frame to move. When the elastic frame moves, it will push the slide bar and the inclined plate to move. When the inclined plate moves upward, the limit on the linkage plate will be released. Under the action of the reset spring, the linkage plate and the elastic rod will be driven to move toward the moving frame. When the moving frame moves, it will hit the elastic rod to produce an abnormal sound to prompt that the cutter needs to be replaced. At the same time, the blocking block will limit the cutter from moving downward next time.

[0018] (4) In this invention, when the mounting plate moves downward, it drives the friction block to fit against the outer wall of the bellows. When the vibration motor drives the mounting plate to move left and right, it drives the friction block to rub quickly on the surface of the bellows. When the friction block rubs against the outer wall of the bellows, the burrs generated on the outer wall of the bellows are removed. When the friction block moves downward, it drives the rubber wheel to insert into the groove of the bellows, thereby limiting the position of the bellows cutting. At the same time, when the rubber wheel rotates, it pushes the contact wheel and the protrusion to rotate. When the protrusion rotates, it hits the vibration plate and drives the friction block to vibrate. The friction block can prevent the waste residue generated by grinding from being between the bellows and the friction block and affecting the grinding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the position structure of the fixed plate and the sliding plate of the present invention;

[0021] Figure 3 For the present invention Figure 1A schematic diagram of the structure of part A in the middle;

[0022] Figure 4 This is a schematic diagram of the position structure of the movable plate and the elastic frame of the present invention;

[0023] Figure 5 This is a schematic diagram of the support frame and the positioning block of the present invention;

[0024] Figure 6 For the present invention Figure 5 A magnified schematic diagram of the structure of part B;

[0025] Figure 7 For the present invention Figure 5 A magnified schematic diagram of the structure of part C in the middle;

[0026] Figure 8 For the present invention Figure 5 A schematic diagram of the structure of part D in the middle is enlarged;

[0027] Figure 9 This is a schematic diagram of the position structure of the movable frame and the vibration motor of the present invention.

[0028] In the figure: 1. support frame; 2. circular frame; 31. movable frame; 32. mounting plate; 33. cutter; 34. vibration motor; 41. fixed plate; 42. slide plate; 43. driving device; 44. umbrella-shaped wheel; 45. electric push rod; 46. limit plate; 47. push rod; 48. L-shaped rod; 49. trapezoidal block; 51. fixed frame; 52. movable frame; 53. concave wheel; 54. bolt; 55. movable plate; 56. elastic frame; 57. push plate; 61. slide rod; 62. tilting plate; 63. linkage plate; 64. elastic rod; 65. inclined plate; 66. extrusion rod; 67. positioning block; 71. slider; 72. friction block; 73. rotating shaft; 74. sleeve block; 75. rubber wheel; 76. contact wheel; 77. bump; 78. vibration plate. DETAILED DESCRIPTION

[0029] The following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0030] See also Figure 1-4One embodiment of the present invention is: a double-wall corrugated pipe cutting device, comprising a support frame 1, a pushing device and an adjusting device, wherein a circular frame 2 is fixedly installed on the surface of the support frame 1, a movable frame 31 is slidably installed on the surface of the support frame 1, a mounting plate 32 is slidably installed inside the movable frame 31, and a cutter 33 is fixedly installed on the bottom of the mounting plate 32; wherein the pushing device comprises a fixed plate 41, a slide plate 42, a driving device 43, an umbrella wheel 44, an electric push rod 45, a limiting plate 46, a pushing rod 47, an L-shaped rod 48 and a trapezoidal block 49. When the corrugated pipe is over-extruded, the corrugated pipe will push the umbrella wheel 44 and the driving device 43 to slide on the slide plate 42. When the driving device 43 moves, it will push the pushing rod 47 to move, and the pushing rod 47 will push the limiting plate 46 upward The limit plate 46 moves upward to limit the rotation of the umbrella wheel 44. The fixed plate 41 is fixedly mounted on the surface of the circular frame 2. The slide plate 42 is slidably mounted on the top of the fixed plate 41. The driving device 43 is slidably mounted on the top of the slide plate 42. The umbrella wheel 44 is fixedly mounted on the output end of the driving device 43. The electric push rod 45 is fixedly mounted on the top of the fixed plate 41. The slide plate 42 and the output end of the electric push rod 45 are fixed. The limit plate 46 is slidably mounted on the surface of the slide plate 42. One end of the push rod 47 is hinged to the limit plate 46, and the other end of the push rod 47 is hinged to the driving device 43. The L-shaped rod 48 is fixedly mounted on the bottom of the limit plate 46. The trapezoidal block 49 slides through the L-shaped rod 48 to prevent the squeezing force on the corrugated tube from being too large, causing the corrugated tube to deform and affect the cutting effect.

[0031] A No. 1 spring is provided between the driving device 43 and the slide plate 42, and the No. 1 spring can drive the driving device 43 to reset. A No. 2 spring is provided between the trapezoidal block 49 and the L-shaped rod 48, and the No. 2 spring can drive the trapezoidal block 49 to reset.

[0032] The adjusting device includes a fixed frame 51, a movable frame 52, a concave wheel 53 and a bolt 54. When the movable frame 52 moves, it will drive the concave wheel 53 to move. The movement of the concave wheel 53 will adjust the height of the corrugated pipe inside the circular frame 2. The fixed frame 51 is fixedly installed inside the circular frame 2, the movable frame 52 is slidably installed inside the fixed frame 51, and the concave wheel 53 is rotatably installed inside the movable frame 52. The bolt 54 is threadedly connected to the fixed frame 51, and the bolt 54 is rotatably installed at the bottom of the movable frame 52. The movable frame 52 and the concave wheel 53 can support the corrugated pipe, so that the inside of the circular frame 2 can adapt to corrugated pipes of different diameters.

[0033] A movable plate 55 slides through the inner and outer walls of the circular frame 2, and an elastic frame 56 is fixedly installed on the surface of the movable plate 55. A pushing plate 57 is fixedly installed on the surface of the movable frame 52. When the movable frame 52 moves, it pushes the pushing plate 57 to move. When the pushing plate 57 moves, the movable plate 55 and the elastic frame 56 move. A No. 3 spring is arranged between the movable plate 55 and the circular frame 2 to prevent the two sides of the bellows from deforming toward the edges when the bellows is cut and squeezed.

[0034] When the present embodiment is working, the bellows is placed inside the circular frame 2, and the electric push rod 45 pushes the slide plate 42 and the driving device 43 to move. The driving device 43 drives the umbrella wheel 44 to fit the surface of the bellows. When the umbrella wheel 44 moves, it squeezes the bellows, and the umbrella wheel 44 is driven to rotate by the driving device 43. The umbrella wheel 44 pushes the bellows to move inside the circular frame 2. When the bellows is over-extruded, the bellows pushes the umbrella wheel 44 and the driving device 43 to slide on the slide plate 42. When the driving device 43 moves, it pushes the pushing rod 47 to move, and the pushing rod 47 pushes the limiting plate 46 to move upward. The limiting plate 46 moves upward to limit the rotation of the umbrella wheel 44. When the limiting plate 46 moves upward, it drives the L-shaped rod 48 and the trapezoidal block 49 to move upward. When the trapezoidal block 49 moves upward, the trapezoidal block 49 is blocked by the fixed plate 41, so that the trapezoidal block 49 can limit the slide plate 42 from continuing to move.

[0035] When the bolt 54 is turned, the bolt 54 will drive the movable frame 52 to move, and when the movable frame 52 moves, the concave wheel 53 will move. The movement of the concave wheel 53 will adjust the height of the corrugated tube inside the circular frame 2. When the movable frame 52 moves, it will push the pushing plate 57 to move. When the pushing plate 57 moves, the movable plate 55 and the elastic frame 56 will move. The elastic frame 56 will fit the side of the corrugated tube when it moves. The mounting plate 32 and the cutter 33 will be driven downward by the movable frame 31. When the cutter 33 moves downward, the corrugated tube will be cut. When the corrugated tube is squeezed by the cutter 33, the corrugated tube will be deformed to both sides.

[0036] See also Figure 1-9When the movable plate 55 is moved, the elastic rod 64 is driven by the movable plate 55, and the movable plate 55 is moved.

[0037] A slanted plate 65 is slidably mounted on the surface of the support frame 1, an extrusion rod 66 is fixedly mounted on the surface of the elastic rod 64, and a blocking block 67 is slidably mounted on the surface of the support frame 1. A No. 4 spring is provided between the blocking block 67 and the support frame 1, and a slot is provided on the top of the blocking block 67. When the extrusion rod 66 moves, the inclined surface of the slanted plate 65 contacts, so that when the extrusion rod 66 moves, it pushes the slanted plate 65 to move upward. When the slanted plate 65 moves upward, it will disengage from the slot of the blocking block 67, and the blocking block 67 will limit the cutter 33 from moving downward next time.

[0038] The grinding device includes a slider 71 and a friction block 72. When the friction block 72 moves downward, it will fit into the surface of the corrugated tube, and the friction block 72 can be used to grind the cutting position of the corrugated tube. A slide groove is provided on the surface of the mounting plate 32, and the slider 71 is slidably installed inside the slide groove. A No. 5 spring is provided between the slider 71 and the slide groove. The friction block 72 is rotatably installed on the surface of the slider 71, and a torsion spring is provided between the friction block 72 and the slider 71. A vibration motor 34 is provided between the movable frame 31 and the mounting plate 32. The vibration motor 34 will drive the mounting plate 32 to move back and forth inside the movable frame 31, thereby improving the effect of the cutter 33 in cutting the corrugated tube. At the same time, the mounting plate 32 will drive the friction block 72 to vibrate to improve the grinding effect and remove the burrs on the outer wall of the corrugated tube.

[0039] The surface of the friction block 72 is rotatably installed with a rotating shaft 73 and a contact wheel 76, the surface of the rotating shaft 73 is slidably installed with a sleeve block 74, the surface of the sleeve block 74 is rotatably installed with a rubber wheel 75, the surface of the contact wheel 76 is fixedly installed with a protrusion 77, and the surface of the friction block 72 is fixedly installed with a vibration plate 78. When the friction block 72 moves downward, it will drive the rotating shaft 73, the sleeve block 74 and the rubber wheel 75 to move downward. When the rubber wheel 75 moves downward, it will insert into the groove of the bellows, causing the rubber wheel 75 to rotate when it moves on the surface of the bellows. When the rubber wheel 75 rotates, it will drive the contact wheel 76 to rotate. When the contact wheel 76 rotates, it will drive the protrusion 77 to rotate. When the protrusion 77 rotates, it will hit the vibration plate 78 to drive the friction block 72 to vibrate, thereby preventing the waste residue generated by grinding from being between the bellows and the friction block 72 and affecting the grinding effect.

[0040] When the cutter 33 is not sharp enough and the cutter 33 over-extends the bellows, the excessive deformation of the bellows will push the slide bar 61 to move. When the slide bar 61 moves, it will contact the inclined surface of the inclined plate 62, so that the slide bar 61 will push the inclined plate 62 to move upward. When the inclined plate 62 moves upward, it will disengage the limit of the linkage plate 63. When the linkage plate 63 moves, it will drive the elastic rod 64 to move in the direction of the support frame 1, so that the movement of the movable frame 31 will hit the elastic rod 64 and produce an abnormal sound. The elastic rod 64 moves, and the extrusion rod 66 moves. When the extrusion rod 66 moves, the inclined surface of the inclined plate 65 contacts, so that the extrusion rod 66 moves, and pushes the inclined plate 65 upward. When the inclined plate 65 moves upward, it will disengage from the slot of the blocking block 67. After the blocking block 67 is released, the direction of the movable frame 31 will be moved under the action of the No. 4 spring, so that the blocking block 67 will limit the movable frame 31 from moving downward next time.

[0041] When the mounting plate 32 moves downward, it drives the slider 71 and the friction block 72 to move downward. When the friction block 72 moves downward, it will fit into the surface of the corrugated pipe, and the cutting position of the corrugated pipe can be polished by the friction block 72. When the friction block 72 moves downward, it will drive the rotating shaft 73, the sleeve block 74 and the rubber wheel 75 to move downward. When the rubber wheel 75 moves downward, it will insert into the groove of the corrugated pipe, causing the rubber wheel 75 to rotate when it moves on the surface of the corrugated pipe. When the rubber wheel 75 rotates, it will drive the contact wheel 76 to rotate. When the contact wheel 76 rotates, it will drive the protrusion 77 to rotate. When the protrusion 77 rotates, it will hit the vibration plate 78 to drive the friction block 72 to vibrate. At the same time, the vibration motor 34 will drive the mounting plate 32 to move back and forth inside the movable frame 31.

[0042] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A double-wall corrugated pipe cutting device, comprising a support frame (1), characterized in that: It also includes a pushing device, an adjusting device and a grinding device; A circular frame (2) is fixedly mounted on the surface of the support frame (1), a movable frame (31) is slidably mounted on the surface of the support frame (1), a mounting plate (32) is slidably mounted inside the movable frame (31), and a cutter (33) is fixedly mounted on the bottom of the mounting plate (32); The pushing device comprises a fixed plate (41), a slide plate (42), a driving device (43), an umbrella wheel (44), an electric push rod (45), a limit plate (46), a pushing rod (47), an L-shaped rod (48) and a trapezoidal block (49), wherein the fixed plate (41) is fixedly mounted on the surface of the circular frame (2), the slide plate (42) is slidably mounted on the top of the fixed plate (41), the driving device (43) is slidably mounted on the top of the slide plate (42), and the umbrella wheel (44) is fixedly mounted on the driving device ( 43), the electric push rod (45) is fixedly mounted on the top of the fixed plate (41), the slide plate (42) is fixed to the output end of the electric push rod (45), the limit plate (46) is slidably mounted on the surface of the slide plate (42), one end of the push rod (47) is hinged to the limit plate (46), the other end of the push rod (47) is hinged to the driving device (43), the L-shaped rod (48) is fixedly mounted on the bottom of the limit plate (46), and the trapezoidal block (49) slides through the L-shaped rod (48).

2. The double-wall corrugated pipe cutting device according to claim 1, characterized in that: A No. 1 spring is provided between the driving device (43) and the slide plate (42), and a No. 2 spring is provided between the trapezoidal block (49) and the L-shaped rod (48).

3. The double-wall corrugated pipe cutting device according to claim 2, characterized in that: The adjusting device comprises a fixed frame (51), a movable frame (52), a concave wheel (53) and a bolt (54); the fixed frame (51) is fixedly mounted inside the circular frame (2); the movable frame (52) is slidably mounted inside the fixed frame (51); the concave wheel (53) is rotatably mounted inside the movable frame (52); the bolt (54) is threadedly connected to the fixed frame (51); and the bolt (54) is rotatably mounted on the bottom of the movable frame (52).

4. The double-wall corrugated pipe cutting device according to claim 3, characterized in that: A movable plate (55) is slidably passed through the inner and outer walls of the circular frame (2); an elastic frame (56) is fixedly mounted on the surface of the movable plate (55); a push plate (57) is fixedly mounted on the surface of the movable frame (52); and a No. 3 spring is provided between the movable plate (55) and the circular frame (2).

5. The double-wall corrugated pipe cutting device according to claim 4, characterized in that: The surface of the movable plate (55) is provided with a limiting device, which includes a slide bar (61), an inclined plate (62), a linkage plate (63) and an elastic rod (64). The slide bar (61) slides through the movable plate (55), the inclined plate (62) is slidably mounted on the surface of the movable plate (55), the linkage plate (63) is slidably mounted on the top of the movable plate (55), a return spring is provided between the linkage plate (63) and the movable plate (55), and the elastic rod (64) is fixedly mounted on the surface of the linkage plate (63).

6. The double-wall corrugated pipe cutting device according to claim 5, characterized in that: An inclined panel (65) is slidably mounted on the surface of the support frame (1), an extrusion rod (66) is fixedly mounted on the surface of the elastic rod (64), a positioning block (67) is slidably mounted on the surface of the support frame (1), a No. 4 spring is provided between the positioning block (67) and the support frame (1), and a slot is provided on the top of the positioning block (67).

7. The double-wall corrugated pipe cutting device according to claim 6, characterized in that: The polishing device comprises a slider (71) and a friction block (72); a slide groove is provided on the surface of the mounting plate (32); the slider (71) is slidably mounted inside the slide groove; a No. 5 spring is provided between the slider (71) and the slide groove; the friction block (72) is rotatably mounted on the surface of the slider (71); a torsion spring is provided between the friction block (72) and the slider (71); and a vibration motor (34) is provided between the movable frame (31) and the mounting plate (32).

8. The double-wall corrugated pipe cutting device according to claim 7, characterized in that: A rotating shaft (73) and a contact wheel (76) are rotatably mounted on the surface of the friction block (72); a sleeve block (74) is slidably mounted on the surface of the rotating shaft (73); a rubber wheel (75) is rotatably mounted on the surface of the sleeve block (74); a convex block (77) is fixedly mounted on the surface of the contact wheel (76); and a vibration plate (78) is fixedly mounted on the surface of the friction block (72).

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