Pipe cutting device for PVC pipe production

Abstract

The invention relates to the technical field of PVC pipe processing, in particular to a pipe cutting device for PVC pipe production, which comprises a cutting table, two conveying rollers for driving a PVC pipe to move are arranged at the top of the cutting table, and a cutting knife for cutting the PVC pipe is further arranged on the cutting table; a synchronizing device for driving the cutting knife and the PVC pipes to move is arranged between the cutting table and the cutting knife, a discharging device for conveying the PVC pipes is arranged at the end, away from the conveying rollers, of the cutting table, and a power device for providing power for the synchronizing device and the discharging device is further arranged between the cutting table and the synchronizing device. Through cooperation of the cutting knife, the synchronizing device, the power device, the synchronizing rod, the lifting frame, the limiting frame, the material moving block, a limiting rod and other structures, the movement speed of the cutting knife is the same as that of a PVC pipe, the cutting knife cuts the PVC pipe, and therefore the PVC pipe can be continuously cut while it is guaranteed that a notch is flat, and the cutting time is shortened.

Description

Technical Field

[0001] The present invention relates to the technical field of PVC pipe processing, and particularly to a pipe cutting device for PVC pipe production. Background Art

[0002] PVC pipes are extruded by hot pressing after mixing polyvinyl chloride resin with stabilizers, lubricants, etc. As one of the products of scientific and technological development, PVC pipes are everywhere in daily life and are widely used in many industries such as industry, construction, and agriculture. In the production process of PVC pipes, it is necessary to cut long PVC pipes, so a pipe cutting device for PVC pipe production is required.

[0003] Although the existing pipe cutting devices for PVC pipe production can quickly cut PVC pipes, in order to ensure the flatness of the cut of PVC pipes, during cutting, it is necessary to stop the movement of the PVC pipe and then use a cutting knife for cutting. Therefore, it is very difficult to continuously cut the PVC pipe while ensuring the flatness of the notch, which increases the cutting time and reduces the work efficiency. Therefore, we propose a pipe cutting device for PVC pipe production. Summary of the Invention

[0004] In order to overcome the deficiencies of the prior art, the present invention provides a pipe cutting device for PVC pipe production.

[0005] To solve the above technical problems, the present invention provides the following technical solutions: A pipe cutting device for PVC pipe production, comprising: A cutting table, on the top of which there are two conveying rollers for driving the movement of the PVC pipe, and a cutting knife for cutting the PVC pipe is also provided on the cutting table; A synchronization device for driving the cutting knife and the PVC pipe to move is arranged between the cutting table and the cutting knife, and a discharging device for transporting the PVC pipe is arranged at one end of the cutting table away from the conveying rollers. A power device for providing power to the synchronization device and the discharging device is also arranged between the cutting table and the synchronization device; The synchronization device includes a fixed frame fixed on the cutting table. Two transmission shafts are symmetrically arranged at the top of the fixed frame. Two eccentric disks are fixed on the two transmission shafts. Two fixed sleeves are fixed on the outer walls of the two eccentric disks. A support rod is fixed between the two fixed sleeves. One end of the two transmission shafts away from the fixed frame is provided with two connecting rods. A lifting frame is arranged on one of the connecting rods, and a first motor for driving the cutting knife to rotate is arranged on the other connecting rod. The eccentric disk is eccentrically arranged on the transmission shaft. Installation rings are fixed at the top and bottom of the connecting rod, and the connecting rod is fixed to the transmission shaft, the lifting frame and the first motor respectively through the installation rings; A secondary bevel gear is fixed on the output shaft of the first motor. A synchronization rod is fixed at one end of the cutting knife. A primary bevel gear meshing with the secondary bevel gear is fixed at the end of the synchronization rod away from the cutting knife. A limiting rod is fixed in the middle of the lifting frame. A limiting frame is also arranged on the top of the cutting table. A movable material transfer block is arranged above the limiting frame. A transmission block is fixed on the side of the material transfer block. A through hole adapted to the limiting rod is arranged on the transmission block. A baffle is fixed after the bottom of the limiting rod penetrates through the through hole. A placement groove for limiting the PVC pipe is arranged on the top of the material transfer block.

[0006] As a preferred technical solution of the present invention, the power device includes a second motor fixed on the cutting table. A worm is fixed on the output shaft of the second motor. A worm gear meshing with the worm is arranged on the worm. A primary pulley is arranged at one end of the worm gear away from the worm. A secondary pulley is fixed on one of the transmission shafts. A belt is arranged between the primary pulley and the secondary pulley. A fixed shaft is arranged between the primary pulley and the worm gear. A support plate is arranged in the middle of the fixed shaft. The output shaft of the second motor drives the worm gear to rotate through the worm, so that the worm gear drives the primary pulley to rotate through the fixed shaft. The primary pulley drives the secondary pulley to rotate through the belt, so that the secondary pulley drives one of the transmission shafts to rotate.

[0007] As a preferred technical solution of the present invention, a chute adapted to the material transfer block is formed by inward depression in the middle of the limiting frame, and a cutting groove adapted to the cutting knife is arranged at one end of the material transfer block. The cutting groove not only enables the cutting knife to quickly cut off the PVC pipe, but also can prevent the material transfer block from contacting the high-speed rotating cutting knife and being worn.

[0008] As a preferred technical solution of the present invention, the discharging device includes two positioning mechanisms. The positioning mechanism includes a loading plate fixed on the cutting table. A plurality of convex blocks are arranged on the top of the loading plate. A feeding plate is hinged on the side of the loading plate. A gap is arranged between the plurality of convex blocks. The PVC pipe is limited through the gap to prevent the pipe from rolling on the loading plate.

[0009] As a preferred technical solution of the present invention, two rotatable rotating shafts are provided on the material loading plate, two rotating plates are provided on the two rotating shafts, a feeding plate is hinged to the bottoms of the two rotating plates, a triangular groove is provided on the top of the feeding plate, and the PVC pipe is limited by the triangular groove to prevent the PVC pipe from rolling when it is on the feeding plate, so that the PVC pipe drops, and one of the rotating shafts is fixed to the end of the worm gear away from the second motor. The output shaft of the second motor drives the worm gear to rotate, so that the worm gear drives the rotating shaft to rotate, and the rotating shaft drives the feeding plate to perform an elliptical motion.

[0010] As a preferred technical solution of the present invention, a plurality of extension plates are provided between the two positioning mechanisms, and two guide rollers are provided on the two positioning mechanisms. A material receiving frame is provided below the two guide rollers. The two ends of the extension plate are respectively fixed to the two feeding plates of the two positioning mechanisms. The plurality of extension plates are arranged on the side where the two feeding plates face each other. One of the feeding plates drives the other feeding plate to perform an elliptical motion through the plurality of extension plates.

[0011] As a preferred technical solution of the present invention, a clamping component is provided between the two conveying rollers. The clamping component includes a bottom plate arranged above the cutting table. Two first clamping blocks are symmetrically arranged above the bottom plate. A plurality of fixing rods for supporting the bottom plate are arranged between the two first clamping blocks and the bottom plate. Two liftable second clamping blocks are arranged above the two first clamping blocks. The bottom plate is fixed between the plurality of fixing rods. The two first clamping blocks are fixed to the lower half of the fixing rods. The two second clamping blocks are sleeved on the upper half of the fixing rods. The bottoms of the plurality of fixing rods are fixed to the top of the cutting table.

[0012] As a preferred technical solution of the present invention, a baffle is fixed after the top of the fixing rod penetrates through the second clamping block. A spring is arranged between the second clamping block and the baffle. Fixing grooves are arranged on the sides of the first clamping block and the second clamping block facing each other. The spring releases elastic force to push the second clamping block to move, so that the second clamping block and the first clamping block clamp the PVC pipe in the fixing groove.

[0013] Compared with the prior art, the beneficial effects that the present invention can achieve are: Through the cooperation of structures such as a cutting knife, a synchronization device, a power device, a synchronization rod, a lifting frame, a limiting frame, a material moving block, and a limiting rod, the material moving block drives the PVC pipe to move, so that the moving speed of the cutting knife is the same as that of the PVC pipe, and the cutting knife cuts the PVC pipe, so that while ensuring a flat notch, the PVC pipe can be continuously cut, shortening the cutting time and improving the work efficiency.

[0014] It enters into the gap of the material loading plate through the PVC pipe, limits the PVC pipe through the gap of the material loading plate, avoids the PVC pipe rolling on the material loading plate and causing the PVC pipe to fall and be damaged.

[0015] The worm drives one of the rotating shafts to rotate, the rotating shaft drives the rotating plate to rotate, the rotating plate drives the feeding plate to move, limits the feeding plate through another rotating plate, makes the feeding plate perform an elliptical motion, and makes the feeding plate move the PVC pipes on the material loading plate, preventing multiple PVC pipes from piling up above the material loading plate and affecting the subsequent storage of PVC pipes.

[0016] The feeding plate drives the PVC pipe to move to the other side of the material loading plate, makes the PVC pipe move onto the guiding rod, and the PVC pipe moves obliquely downward along the guiding rod under the influence of gravity into the inside of the receiving frame, so as to uniformly store the cut pipes, facilitate subsequent management, and further improve the convenience of the device. Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of the present invention; Figure 2 It is a schematic structural diagram of the synchronization device of the present invention; Figure 3 It is a schematic structural diagram of the fixing frame of the present invention; Figure 4 It is a schematic structural diagram of the synchronization rod of the present invention; Figure 5 It is a schematic structural diagram of the lifting frame of the present invention; Figure 6 It is a schematic structural diagram of the limiting rod of the present invention; Figure 7 It is a schematic structural diagram of the material moving block of the present invention; Figure 8 It is a schematic structural diagram of the material loading plate of the present invention; Figure 9 It is a schematic structural diagram of the material clamping assembly of the present invention.

[0018] Wherein: 1. Cutting table; 2. Conveyor roller; 3. Material clamping assembly; 4. Cutting knife; 5. Synchronization device; 6. Material receiving frame; 7. Power device; 8. Discharging device; 301. Fixed rod; 302. Bottom plate; 303. First clamping block; 304. Second clamping block; 305. Spring; 501. Fixed frame; 502. Eccentric disk; 503. Fixed sleeve; 504. First motor; 505. Main bevel gear; 506. Synchronization rod; 507. Lifting frame; 508. Limiting frame; 509. Material moving block; 510. Sub bevel gear; 511. Limiting rod; 512. Support rod; 701. Second motor; 702. Worm; 703. Worm gear; 704. Main pulley; 705. Belt; 706. Sub pulley; 801. Material loading plate; 802. Rotating shaft; 803. Feeding plate; 804. Extension plate. Detailed implementation mode

[0019] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments. However, the following embodiments are only the preferred embodiments of the present invention, not all of them. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work all belong to the protection scope of the present invention. The experimental methods in the following embodiments are all conventional methods unless otherwise specified, and the materials, reagents, etc. used in the following embodiments can be obtained from commercial channels unless otherwise specified.

[0020] Embodiment: The present invention provides a Figure 1 pipe cutting device for PVC pipe production as shown in a cutting table 1, on the top of the cutting table 1 are provided two conveyor rollers 2 for driving the movement of the PVC pipe, and on the cutting table 1 is also provided a cutting knife 4 for cutting the PVC pipe As can be seen from the above, during use, the PVC pipe to be cut is placed on the two conveyor rollers 2, the PVC pipe is conveyed by the two conveyor rollers 2, and the PVC pipe is cut into segments by the cutting knife 4.

[0021] Refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 9 shown, between the cutting table 1 and the cutting knife 4 is provided a synchronization device 5 for driving the movement of the cutting knife 4 and the PVC pipe, and at one end of the cutting table 1 away from the conveyor rollers 2 is provided a discharging device 8 for transporting the PVC pipe, and between the cutting table 1 and the synchronization device 5 is also provided a power device 7 for providing power to the synchronization device 5 and the discharging device 8; The synchronization device 5 includes a fixing frame 501 fixed on the cutting table 1. At the top of the fixing frame 501, two transmission shafts are symmetrically arranged. Two eccentric disks 502 are fixed on the two transmission shafts. Two fixing sleeves 503 are fixed on the outer walls of the two eccentric disks 502. A support rod 512 is fixed between the two fixing sleeves 503. At one end of the two transmission shafts away from the fixing frame 501, two connecting rods are arranged. A lifting frame 507 is arranged on one of the connecting rods, and a first motor 504 for driving the cutting knife 4 to rotate is arranged on the other connecting rod. The eccentric disk 502 is eccentrically arranged on the transmission shaft. Installation rings are fixed at the top and bottom of the connecting rod, and the connecting rod is fixed to the transmission shaft, the lifting frame 507 and the first motor 504 respectively through the installation rings; A secondary bevel gear 510 is fixed on the output shaft of the first motor 504. One end of the cutting knife 4 is fixed with a synchronization rod 506. A main bevel gear 505 meshing with the secondary bevel gear 510 is fixed at the end of the synchronization rod 506 away from the cutting knife 4. A limiting rod 511 is fixed in the middle of the lifting frame 507. A limiting frame 508 is also arranged on the top of the cutting table 1. Above the limiting frame 508, a movable material moving block 509 is arranged. A transmission block is fixed on the side of the material moving block 509. A through hole adapted to the limiting rod 511 is arranged on the transmission block. A baffle is fixed after the bottom of the limiting rod 511 penetrates through the through hole. A placing groove for limiting the PVC pipe is arranged on the top of the material moving block 509.

[0022] The power device 7 includes a second motor 701 fixed on the cutting table 1. A worm 702 is fixed on the output shaft of the second motor 701. A worm gear 703 meshing with the worm 702 is arranged on the worm 702. At one end of the worm gear 703 away from the worm 702, a main pulley 704 is arranged. A secondary pulley 706 is fixed on one of the transmission shafts. A belt 705 is arranged between the main pulley 704 and the secondary pulley 706. A fixed shaft is arranged between the main pulley 704 and the worm gear 703. A support plate is arranged in the middle of the fixed shaft. The output shaft of the second motor 701 drives the worm gear 703 to rotate through the worm 702, so that the worm gear 703 drives the main pulley 704 to rotate through the fixed shaft. The main pulley 704 drives the secondary pulley 706 to rotate through the belt 705, so that the secondary pulley 706 drives one of the transmission shafts to rotate.

[0023] The middle part of the limiting frame 508 is recessed inward to form a chute adapted to the material moving block 509. One end of the material moving block 509 is provided with a cutting groove adapted to the cutting knife 4. By arranging the cutting groove, not only can the cutting knife 4 quickly cut off the PVC pipe, but also the contact between the material moving block 509 and the high-speed rotating cutting knife 4 can be avoided to prevent wear.

[0024] A material clamping assembly 3 is arranged between two conveying rollers 2. The material clamping assembly 3 includes a bottom plate 302 arranged above the cutting table 1. Two first clamping blocks 303 are symmetrically arranged above the bottom plate 302. A plurality of fixing rods 301 for supporting the bottom plate 302 are arranged between the two first clamping blocks 303 and the bottom plate 302. Two liftable second clamping blocks 304 are arranged above the two first clamping blocks 303. The bottom plate 302 is fixed between a plurality of fixing rods 301. The two first clamping blocks 303 are fixed to the lower half of the fixing rods 301. The two second clamping blocks 304 are sleeved on the upper half of the fixing rods 301. The bottoms of the plurality of fixing rods 301 are fixed to the top of the cutting table 1.

[0025] A baffle is fixed after the top of the fixing rod 301 penetrates through the second clamping block 304. A spring 305 is arranged between the second clamping block 304 and the baffle. Fixing grooves are arranged on the opposite sides of the first clamping block 303 and the second clamping block 304. The second clamping block 304 is pushed to move by the elastic force released by the spring 305, so that the second clamping block 304 and the first clamping block 303 clamp the PVC pipe in the fixing groove.

[0026] By adopting the above technical solution: During use, when the PVC pipe needs to be segmented and cut, the PVC pipe is placed in the placement groove of the material transfer block 509. The output shaft of the first motor 504 drives the secondary bevel gear 510 to rotate, so that the secondary bevel gear 510 drives the main bevel gear 505 meshing with it to rotate, so that the main bevel gear 505 drives the synchronous rod 506 to rotate, so that the synchronous rod 506 drives the cutting knife 4 to rotate. At the same time, the output shaft of the second motor 701 drives the worm 702 to rotate, so that the worm 702 drives the worm wheel 703 meshing with it to rotate, so that the worm wheel 703 drives the main pulley 704 to rotate through the fixed shaft, so that the main pulley 704 drives the secondary pulley 706 to rotate through the belt 705, so that the secondary pulley 706 drives one of the transmission shafts to rotate, so that one of the transmission shafts drives one of the eccentric disks 502 to rotate eccentrically, so that one of the eccentric disks 502 drives one of the fixed sleeves 503 to rotate eccentrically. The fixed sleeve 503 drives the other fixed sleeve 503 to move through the support rod 512, so that the other fixed sleeve 503 drives the other transmission to rotate through the eccentric disk 502, so that the two connecting rods rotate synchronously. At the same time, one of the connecting rods drives the lifting frame 507 to perform an elliptical motion. The lifting frame 507 drives the cutting knife 4 to perform an elliptical motion through the synchronous rod 506. And the lifting frame 507 drives the limit rod 511 to perform an elliptical motion. Limited by the transmission block, the limit rod 511 drives the material transfer block 509 to reciprocate inside the chute of the limit frame 508, so that the material transfer block 509 drives the PVC pipe to move, so that the moving speed of the cutting knife 4 is the same as that of the PVC pipe, so that the cutting knife 4 cuts the PVC pipe, thus facilitating people to continuously cut the pipe.

[0027] Secondly, referring to Figure 1 、 Figure 2 、 Figure 3 and Figure 8 As shown, the discharging device 8 includes two positioning mechanisms. The positioning mechanism includes a loading plate 801 fixed on the cutting table 1. The top of the loading plate 801 is provided with a plurality of bumps, and the side of the loading plate 801 is hinged with a feeding plate 803. There is a gap between the plurality of bumps, and the PVC pipe is limited by the gap to prevent the pipe from rolling on the loading plate 801.

[0028] By adopting the above technical solution: During use, after the PVC pipe is cut, the PVC pipe enters the gap of the loading plate 801, and the PVC pipe is limited by the gap of the loading plate 801 to prevent the PVC pipe from rolling on the loading plate 801 and falling, causing damage to the PVC pipe.

[0029] Thirdly, referring to Figures 1 - 4 As shown, two rotatable rotating shafts 802 are provided on the loading plate 801. Two rotating plates are provided on the two rotating shafts 802. The bottom of the two rotating plates is hinged with a feeding plate 803. The top of the feeding plate 803 is provided with a triangular groove, and the PVC pipe is limited by the triangular groove to prevent the PVC pipe from rolling when on the feeding plate 803 and falling. And one of the rotating shafts 802 is fixed to the end of the worm 702 away from the second motor 701. The output shaft of the second motor 701 drives the worm 702 to rotate, so that the worm 702 drives the rotating shaft 802 to rotate, and the rotating shaft 802 drives the feeding plate 803 to perform an elliptical motion.

[0030] By adopting the above technical solution: During use, when the worm 702 rotates, the worm 702 drives one of the rotating shafts 802 to rotate, and the rotating shaft 802 drives the rotating plate to rotate, so that the rotating plate drives the feeding plate 803 to move. The feeding plate 803 is limited by the other rotating plate to make the feeding plate 803 perform an elliptical motion, so that the feeding plate 803 moves the PVC pipe on the loading plate 801, preventing a plurality of PVC pipes from accumulating above the loading plate 801 and affecting the subsequent storage of PVC pipes.

[0031] Finally, referring to Figure 8 As shown, a plurality of extension plates 804 are provided between the two positioning mechanisms, and two guide rollers are provided on the two positioning mechanisms. A receiving frame 6 is provided below the two guide rollers. The two ends of the extension plate 804 are respectively fixed to the two feeding plates 803 of the two positioning mechanisms. The plurality of extension plates 804 are arranged on the side where the two feeding plates 803 face each other. One of the feeding plates 803 drives the other feeding plate 803 to perform an elliptical motion through the plurality of extension plates 804.

[0032] By adopting the above technical solution: During use, when the feeding plate 803 moves the PVC pipe, the feeding plate 803 drives the PVC pipe to move to the other side of the loading plate 801, so that the PVC pipe moves onto the guiding roller. Affected by gravity, the PVC pipe moves obliquely downward along the guiding roller into the interior of the receiving frame 6, thereby storing the cut pipes uniformly, facilitating subsequent management, and further improving the convenience of the device.

[0033] The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited thereto. Within the scope of knowledge possessed by those skilled in the art to which the present invention pertains, various changes can be made without departing from the gist of the present invention.

Claims

1. A pipe cutting device for PVC pipe production, characterized in that, Comprising: A cutting table (1), on the top of the cutting table (1) are provided two conveying rollers (2) for driving the movement of PVC pipes, and on the cutting table (1) is also provided a cutting knife (4) for cutting the PVC pipes; Between the cutting table (1) and the cutting knife (4) is provided a synchronization device (5) for driving the movement of the cutting knife (4) and the PVC pipes, and at one end of the cutting table (1) away from the conveying rollers (2) is provided a discharging device (8) for transporting the PVC pipes, and between the cutting table (1) and the synchronization device (5) is also provided a power device (7) for providing power to the synchronization device (5) and the discharging device (8); The synchronization device (5) includes a fixed frame (501) fixed on the cutting table (1), on the top of the fixed frame (501) are symmetrically provided two transmission shafts, on the two transmission shafts are fixed two eccentric discs (502), on the outer walls of the two eccentric discs (502) are fixed two fixed sleeves (503), between the two fixed sleeves (503) is fixed a support rod (512), at one end of the two transmission shafts away from the fixed frame (501) are provided two connecting rods, on one of the connecting rods is provided a lifting frame (507), and on the other connecting rod is provided a first motor (504) for driving the cutting knife (4) to rotate; Fixed on the output shaft of the first motor (504) is a secondary bevel gear (510), fixed at one end of the cutting knife (4) is a synchronization rod (506), at the end of the synchronization rod (506) away from the cutting knife (4) is fixed a main bevel gear (505) meshing with the secondary bevel gear (510), fixed in the middle of the lifting frame (507) is a limiting rod (511), on the top of the cutting table (1) is also provided a limiting frame (508), above the limiting frame (508) is provided a movable material shifting block (509), fixed on the side of the material shifting block (509) is a transmission block, and on the transmission block is provided a through hole adapted to the limiting rod (511).

2. The pipe cutting device for PVC pipe production according to claim 1, characterized in that, The power device (7) includes a second motor (701) fixed on the cutting table (1), fixed on the output shaft of the second motor (701) is a worm (702), on the worm (702) is provided a worm wheel (703) meshing therewith, at one end of the worm wheel (703) away from the worm (702) is provided a main pulley (704), fixed on one of the transmission shafts is a secondary pulley (706), and between the main pulley (704) and the secondary pulley (706) is provided a belt (705).

3. A pipe cutting device for PVC pipe production according to claim 1, characterized in that, The middle of the limiting frame (508) is recessed inward to form a chute adapted to the material shifting block (509), and at one end of the material shifting block (509) is provided a cutting groove adapted to the cutting knife (4).

4. A pipe cutting device for PVC pipe production according to claim 1, characterized in that, The discharging device (8) includes two positioning mechanisms, the positioning mechanism includes a loading plate (801) fixed on the cutting table (1), on the top of the loading plate (801) are provided a plurality of bumps, and on the side of the loading plate (801) is hinged a feeding plate (803), and there are gaps between the plurality of bumps.

5. A pipe cutting device for PVC pipe production according to claim 4, characterized in that, Two rotatable rotating shafts (802) are provided on the material loading plate (801). Two rotating plates are provided on the two rotating shafts (802). A feeding plate (803) is hinged to the bottom of the two rotating plates. A triangular groove is provided at the top of the feeding plate (803).

6. A pipe cutting device for PVC pipe production according to claim 5, characterized in that, A plurality of extension plates (804) are provided between the two positioning mechanisms. Two guide rollers are provided on the two positioning mechanisms. A material receiving frame (6) is provided below the two guide rollers.

7. A pipe cutting device for PVC pipe production according to claim 1, characterized in that, A clamping component (3) is provided between the two conveying rollers (2). The clamping component (3) includes a bottom plate (302) arranged above the cutting table (1). Two first clamping blocks (303) are symmetrically arranged above the bottom plate (302). A plurality of fixing rods (301) for supporting the bottom plate (302) are arranged between the two first clamping blocks (303) and the bottom plate (302). Two liftable second clamping blocks (304) are arranged above the two first clamping blocks (303).

8. A pipe cutting device for PVC pipe production according to claim 7, characterized in that, The top of the fixing rod (301) penetrates through the second clamping block (304) and is fixed with a baffle. A spring (305) is arranged between the second clamping block (304) and the baffle. Fixing grooves are arranged on the opposite sides of the first clamping block (303) and the second clamping block (304).

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