A PVC pipe cutting device

Abstract

The present invention belongs to the technical field of PVC pipes, and specifically is a PVC pipe cutting device, comprising a workbench; a fixed block is fixedly connected to the workbench; a positioning rotating member is provided on the side wall of the fixed block; the positioning rotating member comprises a gear plate; the gear plate is rotatably connected to the side wall of the fixed block; a power gear is provided on the side wall of the fixed block close to the gear plate; the power gear and the gear plate are meshed with each other; a group of positioning blocks are fixedly connected to the inner wall of the gear plate through an electric telescopic rod; a lifting and cutting mechanism is provided on the top of the fixed block; the lifting and cutting mechanism comprises a hydraulic cylinder and a cutting plate; the present invention provides a PVC pipe cutting device to solve the problem that manual sawing or electric sawing is generally used when cutting PVC pipes with larger inner diameters, but when cutting by this method, the cutting surface of the PVC pipe is not smooth enough, and leakage will occur when the PVC pipes are docked.

Description

Technical Field

[0001] The invention belongs to the technical field of PVC pipes, in particular to a PVC pipe cutting device. Background Art

[0002] PVC pipes are polyvinyl chloride pipes, which are made of polyvinyl chloride resin, stabilizers, lubricants, etc. and then extruded by hot pressing. They are the earliest plastic pipes developed and applied. PVC pipes have strong corrosion resistance, are easy to bond, are low in price, and have a hard texture. They are currently widely used in municipal administration, construction, water supply and drainage, chemical industry and other fields. They are used to transport heating liquids and coolants, food, ultra-pure liquids, mud, gas, and compressed air. In actual use, PVC pipes need to be cut. Common cutting methods include manual sawing, electric saw cutting, planetary cutting, etc.

[0003] Some technical solutions for PVC pipe technology have also appeared in the prior art. For example, a Chinese patent with application number 2017109461647 discloses an environmentally friendly PVC pipe cutting machine, including a base plate, both sides of the top of the base plate are fixedly connected to first electric telescopic rods, the tops of the two first electric telescopic rods are laterally fixedly connected to positioning plates, the center of the bottom of the positioning plate is fixedly connected to a fixing seat, and the bottom of the fixing seat is fixedly connected to a grinding wheel machine.

[0004] In the current prior art, manual sawing or electric sawing is generally used to cut PVC pipes with larger inner diameters. However, when cutting using this method, the cut surface of the PVC pipe is not smooth enough, which may cause leakage when the PVC pipes are connected. Therefore, the present invention provides a PVC pipe cutting device. Summary of the invention

[0005] In order to make up for the shortcomings of the prior art and solve the problem that manual sawing or electric sawing is generally used when cutting PVC pipes with larger inner diameters, but when cutting using this method, the cut surface of the PVC pipe is not smooth enough, which may cause leakage when connecting the PVC pipes, the present invention proposes a PVC pipe cutting device.

[0006] The technical solution adopted by the present invention to solve its technical problems is as follows: a PVC pipe cutting device described in the present invention comprises a workbench; a fixed block is fixedly connected to the workbench; a positioning rotating member is provided on the side wall of the fixed block; the positioning rotating member comprises a gear plate; the gear plate is rotatably connected to the side wall of the fixed block; a power gear is arranged on the side wall of the fixed block close to the gear plate; the power gear and the gear plate are meshed with each other; a group of positioning blocks are fixedly connected to the inner wall of the gear plate through an electric telescopic rod; a lifting and cutting mechanism is arranged on the top of the fixed block; the lifting and cutting mechanism comprises a hydraulic cylinder and a cutting disc; the hydraulic cylinder is fixedly connected to the top of the fixed block; the hydraulic rod in the hydraulic cylinder is connected to an electric motor; the cutting disc is fixedly connected to the output shaft of the electric motor; the cutting disc is located on the side of the fixed block away from the gear disc; the workbench is connected to the lifting platform through a lifting unit; the lifting platform is located on the side of the fixed block rotatably connected to the gear disc; the lifting A group of rollers are arranged on the inner wall of the lowering platform; when working, in the prior art, when cutting PVC pipes with larger inner diameters, manual sawing or electric sawing is generally adopted, but when cutting by this method, the cutting surface of the PVC pipe will not be smooth enough, and leakage will occur when the PVC pipes are docked. When it is necessary to cut PVC pipes with larger inner diameters, the present invention places the PVC pipe in the gear plate first, starts the electric telescopic rod to drive the positioning block to push inward, positions the PVC pipe, fixes it, and then adjusts the height of the lifting platform to ensure that the center line of the PVC pipe is on the horizontal line, and then starts the power gear to drive the gear plate to rotate, and the rotation of the gear plate drives the PVC pipe to rotate, and at the same time starts the hydraulic cylinder and the motor to push the cutting disc to move downward and rotate, so as to cut the rotating PVC pipe. The cutting disc can cut the PVC pipe for one circle to cut it off, and the rotation directions of the cutting disc and the PVC pipe are opposite, so as to enhance the cutting effect and ensure the smoothness of the cutting surface of the PVC pipe.

[0007] Preferably, the side wall of the positioning block close to the center point of the gear disk is an arc-shaped wall; a first cavity is provided in the positioning block; a group of negative pressure machines are fixedly connected to the gear disk; a first rubber layer is fixedly connected to the arc-shaped wall of the positioning block; a first through hole is provided on the side wall of the first cavity close to the arc-shaped wall of the positioning block; the first through hole penetrates the first rubber layer; the negative pressure machine and the first cavity are connected to each other; during operation, the outer surface of the PVC tube itself is relatively smooth. When the positioning block positions and fixes the PVC tube, a large extrusion force needs to be applied to achieve the fixing effect of the positioning block on the PVC tube to prevent the PVC tube from slipping. However, a large extrusion force is easy to damage the PVC tube. To avoid this situation, after the positioning block positions the PVC tube, the outer wall of the PVC tube is tightly attached to the first rubber layer. When the negative pressure machine is started to inhale air from the first through hole, the PVC tube is tightly adsorbed by the adsorption force. The use of the adsorption force can not only prevent the large extrusion force from damaging the PVC tube, but also increase the fixing force on the PVC tube.

[0008] Preferably, the first through hole is a gourd-shaped hole; a pair of symmetrical first grooves are provided on the inner wall in the middle of the first through hole; a sealing plate is fixedly connected to the bottom of the first groove by a spring; a group of grooves are provided on the side wall of the sealing plate close to the first rubber layer; a pair of symmetrically distributed support rods are fixedly connected to the side wall of the first through hole close to the first rubber layer; a connecting rod is hinged on the side wall of the groove; a first push rod is hinged on the end of the connecting rod away from the groove; the first push rod passes through the middle of the support rod, and a first push plate is fixedly connected to the end away from the connecting rod; when working, the positioning block can fix PVC pipes of different inner diameters, but the arc angle of the arc wall on the positioning block cannot be changed, and PVC pipes of different inner diameters can be fixed. When the PVC pipe is locked, the outer wall of the PVC pipe cannot be completely attached to the arc-shaped wall of the locking block. However, when the first through hole is in an open state, part of the suction force will be wasted. To avoid this situation, a sealing plate is provided in the first through hole of the present invention. When the PVC pipe is squeezed and fixed, the outer wall of the PVC pipe will first push the first push plate, and the first push plate drives the first push rod to move. The first push rod moves and pushes the sealing plate into the first groove through the connecting column to open the first through hole, ensuring that the first through hole is in a fully open state only where the PVC pipe is attached to the locking block. Then the negative pressure machine is turned on to adsorb the PVC pipe to the outer wall of the locking block at this time, thereby ensuring the maximization of the adsorption force and avoiding the waste of the adsorption force.

[0009] Preferably, a semicircular airbag is fixedly connected to the side wall of the first push plate away from the first push plate; a group of bosses are fixedly connected to the outer wall of the semicircular airbag; air outlet holes are opened between the bosses, and the air outlet holes are connected to the interior of the semicircular airbag; when working, when the outer wall of the PVC tube squeezes the first push plate, the semicircular airbag on the first push plate will be squeezed first, and the gas in the airbag will be ejected from the air outlet to clean the outer wall of the PVC tube to ensure that when the first through hole is adsorbed, there will be no debris on the outer wall of the PVC tube that affects the adsorption force, and the boss is arranged so that the outer wall of the PVC tube will first contact the boss, leaving a cleaning gap between the outer wall of the PVC tube and the air outlet to ensure the falling off of impurities, and after the semicircular airbag has squeezed the gas, the boss will be tightly attached to the first push plate, which can increase the fixing force on the PVC tube.

[0010] Preferably, a group of second cavities are opened in the boss; a group of second push plates are fixedly connected to the side wall of the second cavity close to the first push plate through a spring; a pushing rod is fixedly connected to the side wall of the second push plate away from the first push plate; the end of the pushing rod away from the second push plate passes through the boss and extends out of the boss; during operation, after the PVC pipe is fixed, the pushing rod on the boss will press against the outer wall of the PVC pipe. Because the PVC pipe will generate cutting vibration during rotation cutting, the large vibration amplitude will affect the smoothness of the cutting surface. When cutting vibration occurs, the pushing rod will offset part of the vibration effect under the action of the spring force, thereby increasing the smoothness of the cutting surface.

[0011] Preferably, a group of second grooves are provided on the end of the top rod extending out of the boss; a top ball is fixedly connected to the bottom of the second groove through a spring; an elastic curved membrane is fixedly connected to the side wall of the second groove near the opening, and the elastic curved membrane is concave in the direction of the second groove; a group of cleaning brushes is fixedly connected to the outer wall of the elastic curved membrane; the first push plate includes a first fixed rod and a first screw; one end of the first fixed rod is hinged on the connecting rod, and the other end is rotatably connected to the first screw; a nut is fixedly connected to the middle position of the support rod, and the first screw is connected to the nut; the end of the first screw away from the fixed rod is fixedly connected to the first push plate; when working, when the PVC pipe squeezes the first push plate, it will push the first screw to move up when the nut rotates, and the rotation of the first screw will drive the first push plate to transmit, and the rotation of the first push plate will drive the top ball at the end of the top rod to slide outward under the action of the centrifugal force of the rotation of the first screw, squeezing the elastic curved membrane, and the elastic curved membrane bulges outward, and the cleaning brush on the outer wall of the elastic curved membrane is unfolded to brush the outer wall, so as to further clean the outer wall of the PVC pipe that needs to be adsorbed.

[0012] Preferably, the first screw comprises a second screw and a second fixed rod; one end of the second screw is rotatably connected to the first fixed rod, and the other end passes through the middle of the support rod, and a third cavity is opened at the end; one end of the second fixed rod extends into the third cavity, and is fixedly connected to the side wall of the third cavity near the positioning block through a spring, and the other end is fixedly connected to the first push plate; a group of vibration plates are fixedly connected to the side walls of both sides of the third cavity and the side walls of the end of the second fixed rod extending into the third cavity; a group of vibration blocks are fixedly connected to the end of the vibration plate; during operation, when the PVC pipe squeezes the first push plate, the end of the second fixed rod is squeezed to move in the third cavity while squeezing the semicircular airbag, and when the second fixed rod moves in the third cavity, the vibration plates contact and collide with each other, and then dislocate, which will drive the vibration of the vibration plate, and at the same time drive the first push plate to vibrate through the second fixed rod, and the vibration of the first push plate will drive the boss to vibrate, and when the airbag is discharged and cleaned, the boss vibrates, which makes it easier to clean impurities attached to the outer wall of the PVC pipe, thereby improving the cleaning effect on the outer wall of the PVC pipe.

[0013] Preferably, a guide rod is fixedly connected to the side wall of the third cavity close to the locking block; a guide groove is fixedly connected to the end of the second fixing rod extending into the third cavity; the guide rod is slidably connected to the guide groove, and both the guide rod and the guide groove are square; during operation, when the first push plate pushes the second fixing rod into the third cavity, the guide rod will move in the guide groove to ensure the moving direction of the second fixing rod, and when the end of the second fixing rod extending into the third cavity contacts the side wall of the third cavity, the second fixing rod will be driven to push the second lead screw to move up and rotate, and the guide rod and the guide groove are both square, ensuring that the second fixing rod will rotate with the second lead screw to drive the cleaning brush to clean.

[0014] Working principle: when it is necessary to cut a PVC pipe with a larger inner diameter, place the PVC pipe in the gear plate first, start the electric telescopic rod to drive the positioning block to push inward, and when the positioning block fixes the PVC pipe, the outer wall of the PVC pipe will first squeeze the semicircular air bag, and the gas in the air bag will be ejected from the air outlet, squeezing the end of the second fixed rod to move in the third cavity. When the second fixed rod is extended into the third cavity, the vibration plates will contact and collide with each other, and in the case of misalignment, the vibration of the vibration plates will be driven, and the first push plate will be driven to vibrate through the second fixed rod. The vibration of the first push plate will drive the boss to vibrate, and clean the impurities on the outer wall of the PVC pipe; then when the end of the second fixed rod extends into the third cavity and contacts the side wall of the third cavity, it will drive the second fixed rod to push the second lead screw to move upward and rotate, and the rotation of the first lead screw will drive the first push plate to transmit, and the rotation of the first push plate will drive the end of the top rod The top ball slides outward under the action of the centrifugal force of the rotation of the first screw, squeezing the elastic curved membrane, which bulges outward, and unfolds the cleaning brush on the outer wall of the elastic curved membrane to brush the outer wall, thereby further cleaning the outer wall of the PVC pipe that needs to be adsorbed; when the PVC pipe drives the first push rod to move through the first push plate, the first push rod moves and pushes the sealing plate into the first groove through the connecting column, opening the first through hole, ensuring that the first through hole is in a fully open state only where the PVC pipe fits in the positioning block, and then turning on the negative pressure machine to adsorb the PVC pipe to fit in the outer wall of the positioning block, positioning the PVC pipe, fixing it, and then adjusting the height of the lifting platform to ensure that the center line of the PVC pipe is on the horizontal line, and then starting the power gear to drive the gear plate to rotate, and the rotation of the gear plate drives the PVC pipe to rotate, and at the same time starting the hydraulic cylinder and the motor to push the cutting disc to move downward and rotate, so as to cut the rotating PVC pipe.

[0015] The beneficial effects of the present invention are as follows:

[0016] 1. The PVC pipe cutting device described in the present invention cuts the rotating PVC pipe through a positioning rotating member and a lifting cutting mechanism. The cutting disc can cut the PVC pipe for one circle to cut it off. The rotation directions of the cutting disc and the PVC pipe are opposite, which enhances the cutting effect and ensures the smoothness of the cut surface of the PVC pipe.

[0017] 2. The PVC pipe cutting device described in the present invention sucks air from the first through hole through a negative pressure machine, and uses adsorption force to tightly adsorb the PVC pipe. The adsorption force can not only avoid damage to the PVC pipe caused by a large squeezing force, but also increase the fixing force on the PVC pipe.

[0018] 3. The PVC pipe cutting device described in the present invention can clean the outer side wall of the PVC pipe that needs to be clamped when the PVC pipe is attached to the clamping block through the mutual cooperation between the boss, the semicircular airbag, the lifting rod and the cleaning brush, so as to ensure cleanliness and facilitate the suction of the negative pressure machine through the first through hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] Figure 1 It is a three-dimensional schematic diagram of the present invention;

[0021] Figure 2 is a side view of the gear plate;

[0022] Figure 3 yes Figure 2 A magnified image of area A;

[0023] Figure 4 yes Figure 3 Enlarged view of area B;

[0024] Figure 5 yes Figure 4 Enlarged view of area C in the middle;

[0025] Figure 6 is a cross-sectional view of the boss;

[0026] Figure 7 It is a partial cross-sectional view of the end of the top rod;

[0027] In the figure: 1, workbench; 11, fixed block; 12, lifting and cutting mechanism; 121, hydraulic cylinder; 122, cutting disc; 13, positioning rotating member; 131, gear disc; 132, power gear; 133, electric telescopic rod; 134, positioning block; 14, lifting platform; 2, negative pressure machine; 21, first cavity; 22, first rubber layer; 23, first through hole; 3, first groove; 31, sealing plate; 32, first Push rod; 33, connecting rod; 34, first push plate; 4, semicircular air bag; 41, boss; 42, air outlet; 5, second cavity; 51, top rod; 6, first fixed rod; 61, first screw; 62, second groove; 63, top ball; 64, elastic curved membrane; 65, cleaning brush; 7, second screw; 71, third cavity; 72, second fixed rod; 73, vibration plate; 74, guide rod; 75, guide groove. DETAILED DESCRIPTION

[0028] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0029] like Figures 1 to 7 As shown, a PVC pipe cutting device according to the present invention comprises a workbench 1; a fixed block 11 is fixedly connected to the workbench 1; a locking rotating member 13 is provided on the side wall of the fixed block 11; the locking rotating member 13 comprises a gear plate 131; the gear plate 131 is rotatably connected to the side wall of the fixed block 11; a power gear 132 is provided on the side wall of the fixed block 11 close to the gear plate 131; the power gear 132 and the gear plate 131 are meshed with each other; a power gear 132 is fixedly connected to the inner wall of the gear plate 131 through an electric telescopic rod 133 A group of positioning blocks 134; a lifting and cutting mechanism 12 is provided at the top of the fixed block 11; the lifting and cutting mechanism 12 includes a hydraulic cylinder 121 and a cutting disc 122; the hydraulic cylinder 121 is fixedly connected to the top of the fixed block 11; the hydraulic rod in the hydraulic cylinder 121 is connected to a motor; the cutting disc 122 is fixedly connected to the output shaft of the motor; the cutting disc 122 is located on the side of the fixed block 11 away from the gear disc 131; the workbench 1 is connected to a lifting platform 14 through a lifting unit; the lifting platform 14 is located on the rotating connection of the fixed block 11 A side connected to a gear disk 131; a group of rollers are arranged on the inner wall of the lifting platform 14; during operation, in the prior art, when cutting a PVC pipe with a larger inner diameter, manual sawing or electric sawing is generally adopted, but when cutting by this method, the cutting surface of the PVC pipe is not smooth enough, and leakage will occur when the PVC pipe is docked. When the PVC pipe with a larger inner diameter needs to be cut, the PVC pipe is first placed in the gear disk 131, and the electric telescopic rod 133 is started to drive the positioning block 134 to push inward, position the PVC pipe, fix it, and then adjust the height of the lifting platform 14 to ensure that the center line of the PVC pipe is on the horizontal line, and then the power gear 132 is started to drive the gear disk 131 to rotate, and the rotation of the gear disk 131 drives the PVC pipe to rotate, and at the same time, the hydraulic cylinder 121 and the motor are started to push the cutting disk 122 downward to rotate, and the rotating PVC pipe is cut, and the cutting disk 122 can cut the PVC pipe for a circle to cut it off, and the rotation direction of the cutting disk 122 and the PVC pipe is opposite, so as to enhance the cutting effect and ensure the smoothness of the cutting surface of the PVC pipe.

[0030] As an embodiment of the present invention, the side wall of the positioning block 134 close to the center point of the gear plate 131 is an arc-shaped wall; a first cavity 21 is provided in the positioning block 134; a group of negative pressure machines 2 are fixedly connected to the gear plate 131; a first rubber layer 22 is fixedly connected to the arc wall of the positioning block 134; a first through hole 23 is provided on the side wall of the first cavity 21 close to the arc wall of the positioning block 134; the first through hole 23 penetrates the first rubber layer 22; the negative pressure machine 2 and the first cavity 21 are connected to each other; when working, the outer surface of the PVC pipe itself is relatively smooth, and the positioning block 1 When the PVC pipe is positioned and fixed by the positioning block 134, a large extrusion force needs to be applied to achieve the fixing effect of the positioning block 134 on the PVC pipe to prevent the PVC pipe from slipping. However, the large extrusion force can easily damage the PVC pipe. To avoid this, after the positioning block 134 positions the PVC pipe, the outer wall of the PVC pipe is tightly attached to the first rubber layer 22. When the negative pressure machine 2 is started to inhale air from the first through hole 23, the PVC pipe is tightly adsorbed by the adsorption force. The adsorption force can not only prevent the large extrusion force from damaging the PVC pipe, but also increase the fixing force on the PVC pipe.

[0031] As an embodiment of the present invention, the first through hole 23 is a gourd-shaped hole; a pair of symmetrical first grooves 3 are provided on the inner wall in the middle of the first through hole 23; a sealing plate 31 is fixedly connected to the bottom of the first groove 3 by a spring; a group of grooves are provided on the side wall of the sealing plate 31 close to the first rubber layer 22; a pair of symmetrically distributed support rods are fixedly connected to the side wall of the first through hole 23 close to the first rubber layer 22; a connecting rod 33 is hinged on the side wall of the groove; a first push rod 32 is hinged on the end of the connecting rod 33 away from the groove; the first push rod 32 passes through the middle of the support rod, and a first push plate 34 is fixedly connected to the end away from the connecting rod 33; when working, because the positioning block 134 can fix PVC pipes of different inner diameters, but because the arc angle of the arc wall on the positioning block 134 cannot be changed, When the PVC tube is positioned, the outer wall of the PVC tube cannot be completely attached to the arc-shaped wall of the positioning block 134. However, at this time, when the first through hole 23 is in an open state, part of the suction force will be wasted. To avoid this situation, a sealing plate 31 is provided in the first through hole 23 of the present invention. When the PVC tube is squeezed and fixed, the outer wall of the PVC tube will first push the first push plate 34, and the first push plate 34 drives the first push rod 32 to move. The first push rod 32 moves through the connecting column to push the sealing plate 31 into the first groove 3, open the first through hole 23, and ensure that only the first through hole 23 where the PVC tube is attached to the positioning block 134 is in a fully open state. Then turn on the negative pressure machine 2 to adsorb the PVC tube to the outer wall of the positioning block 134 at this time, so as to maximize the adsorption force and avoid waste of adsorption force.

[0032] As an embodiment of the present invention, a semicircular airbag 4 is fixedly connected to the side wall of the first push plate 34 away from the first push plate 34; a group of bosses 41 are fixedly connected to the outer wall of the semicircular airbag 4; an air outlet hole 42 is opened between the bosses 41, and the air outlet hole 42 is connected to the interior of the semicircular airbag 4; when working, when the outer wall of the PVC tube squeezes the first push plate 34, the semicircular airbag 4 on the first push plate 34 will be squeezed first, and the gas of the airbag will be ejected from the air outlet hole 42 to clean the outer wall of the PVC tube to ensure that when the first through hole 23 is adsorbed, there will be no debris on the outer wall of the PVC tube that affects the adsorption force, and the arrangement of the boss 41 is that the outer wall of the PVC tube will first contact the boss 41, and a cleaning gap is left between the outer wall of the PVC tube and the air outlet hole 42 to ensure the falling off of impurities, and after the semicircular airbag 4 has squeezed the gas, the boss 41 will be tightly attached to the first push plate 34, which can increase the fixing force on the PVC tube.

[0033] As an embodiment of the present invention, a group of second cavities 5 are opened in the boss 41; a group of second push plates are fixedly connected to the side wall of the second cavity 5 close to the first push plate 34 through a spring; a top rod 51 is fixedly connected to the side wall of the second push plate away from the first push plate 34; the end of the top rod 51 away from the second push plate passes through the boss 41 and extends out of the boss 41; during operation, after the PVC pipe is fixed, the top rod 51 on the boss 41 will press against the outer wall of the PVC pipe. Because the PVC pipe will generate cutting vibration during rotation cutting, the large vibration amplitude will affect the smoothness of the cutting surface. When cutting vibration occurs, the top rod 51 will offset part of the vibration effect under the action of the spring force, thereby increasing the smoothness of the cutting surface.

[0034] As an embodiment of the present invention, a group of second grooves 62 are formed on the end of the top rod 51 extending out of the boss 41; a top ball 63 is fixedly connected to the bottom of the second groove 62 through a spring; an elastic curved membrane 64 is fixedly connected to the side wall of the second groove 62 near the opening, and the elastic curved membrane 64 is concave inwardly toward the second groove 62; a group of cleaning brushes 65 are fixedly connected to the outer wall of the elastic curved membrane 64; the first push plate 34 includes a first fixed rod 6 and a first screw 61; one end of the first fixed rod 6 is hinged to the connecting rod 33, and the other end is rotatably connected to the first screw 61; a screw is fixedly connected to the middle of the support rod The nut and the first lead screw 61 are connected to the nut; the end of the first lead screw 61 away from the fixed rod is fixedly connected to the first push plate 34; when working, when the PVC pipe squeezes the first push plate 34, the first lead screw 61 will be pushed to move up when the nut rotates, and the rotation of the first lead screw 61 will drive the first push plate 34 to transmit, and the rotation of the first push plate 34 will drive the top ball 63 at the end of the top rod 51 to slide outward under the action of the centrifugal force of the rotation of the first lead screw 61, squeezing the elastic curved membrane 64, and the elastic curved membrane 64 bulges outward, and the cleaning brush 65 on the outer wall of the elastic curved membrane 64 is unfolded to brush the outer wall, so as to further clean the outer wall of the PVC pipe that needs to be adsorbed.

[0035] As an embodiment of the present invention, the first lead screw 61 includes a second lead screw 7 and a second fixing rod 72; one end of the second lead screw 7 is rotatably connected to the first fixing rod 6, and the other end passes through the middle of the support rod, and a third cavity 71 is opened at the end; one end of the second fixing rod 72 extends into the third cavity 71, and is fixedly connected to the side wall of the third cavity 71 close to the positioning block 134 through a spring, and the other end is fixedly connected to the first push plate 34; a group of vibration plates 73 are fixedly connected to the side walls of both sides of the third cavity 71 and the end side walls of the second fixing rod 72 extending into the third cavity 71; a When the PVC tube is working, the first push plate 34 is squeezed, and the end of the second fixing rod 72 is squeezed to move in the third cavity 71 while squeezing the semicircular airbag 4. When the second fixing rod 72 moves in the third cavity 71, the vibration plates 73 contact and collide with each other, and then displace, which will drive the vibration of the vibration plate 73. At the same time, the first push plate 34 is driven to vibrate through the second fixing rod 72. The vibration of the first push plate 34 will drive the boss 41 to vibrate. When the airbag is venting and cleaning, the boss 41 vibrates, which makes it easier to clean impurities attached to the outer wall of the PVC tube, thereby improving the cleaning effect on the outer wall of the PVC tube.

[0036] As an embodiment of the present invention, a guide rod 74 is fixedly connected to the side wall of the third cavity 71 close to the locking block 134; a guide groove 75 is fixedly connected to the end of the second fixing rod 72 extending into the third cavity 71; the guide rod 74 is slidably connected to the guide groove 75, and both the guide rod 74 and the guide groove 75 are square; during operation, when the first push plate 34 pushes the second fixing rod 72 into the third cavity 71, the guide rod 74 will move in the guide groove 75 to ensure the moving direction of the second fixing rod 72, and when the end of the second fixing rod 72 extending into the third cavity 71 contacts the side wall of the third cavity 71, the second fixing rod 72 will be driven to push the second lead screw 7 to move upward and rotate, and the guide rod 74 and the guide groove 75 are both square, ensuring that the second fixing rod 72 will rotate with the second lead screw 7, driving the cleaning brush 65 to clean.

[0037] Working principle: When it is necessary to cut a PVC pipe with a larger inner diameter, the PVC pipe is first placed in the gear plate 131, and the electric telescopic rod 133 is turned on to drive the positioning block 134 to push inward. When the positioning block 134 positions the PVC pipe, the outer wall of the PVC pipe will first squeeze the semicircular airbag 4, and the gas in the airbag will be ejected from the air outlet 42, while squeezing the end of the second fixing rod 72 to move in the third cavity 71. When the second fixing rod 72 is extended into the third cavity 71, the vibration plates 73 are mutually The mutual contact and collision, when misaligned, will drive the vibration of the vibration plate 73, and at the same time drive the first push plate 34 to vibrate through the second fixing rod 72, and the vibration of the first push plate 34 will drive the boss 41 to vibrate, so as to clean the impurities on the outer wall of the PVC pipe; then when the end of the second fixing rod 72 extends into the third cavity 71 and contacts the side wall of the third cavity 71, the second fixing rod 72 will be driven to push the second lead screw 7 to move upward and rotate, and the rotation of the first lead screw 61 will drive the first push plate 34 to transmit, and the rotation of the first push plate 34 will drive the end of the top rod 51 The top ball 63 of the top part slides outward under the action of the centrifugal force of the rotation of the first screw 61, squeezing the elastic curved membrane 64, and the elastic curved membrane 64 bulges outward, and the cleaning brush 65 on the outer wall of the elastic curved membrane 64 is unfolded to brush the outer wall, and further clean the outer wall of the PVC pipe that needs to be adsorbed; when the PVC pipe drives the first push rod 32 to move through the first push plate 34, the first push rod 32 moves through the connecting column to push the sealing plate 31 into the first groove 3, and opens the first through hole 23, ensuring that only the first through hole 23 where the PVC pipe is attached to the positioning block 134 is in a fully opened state, and then the negative pressure machine 2 is opened, and the PVC pipe is adsorbed to the outer wall of the positioning block 134 at this time, and the PVC pipe is positioned and fixed, and then the height of the lifting platform 14 is adjusted to ensure that the center line of the PVC pipe is on the horizontal line, and then the power gear 132 is started to drive the gear plate 131 to rotate, and the gear plate 131 rotates to drive the PVC pipe to rotate, and at the same time, the hydraulic cylinder 121 and the motor are started to push the cutting disk 122 to move down and rotate, and the rotating PVC pipe is cut.

[0038] The above-mentioned front, back, left, right, top and bottom are all based on the figures in the specification. Figure 1 As a benchmark, according to the person's observation perspective, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0039] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present invention.

[0040] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A PVC pipe cutting device, characterized in that: The invention comprises a workbench (1); a fixed block (11) is fixedly connected to the workbench (1); a locking rotating member (13) is provided on the side wall of the fixed block (11); the locking rotating member (13) comprises a gear plate (131); the gear plate (131) is rotatably connected to the side wall of the fixed block (11); a power gear (132) is provided on the side wall of the fixed block (11) close to the gear plate (131); the power gear (132) and the gear plate (131) are meshed with each other; a group of locking blocks (134) are fixedly connected to the inner wall of the gear plate (131) via an electric telescopic rod (133); a lifting and cutting mechanism (12) is provided on the top of the fixed block (11); the lifting and cutting mechanism (12) comprises a hydraulic cylinder (12 1) and a cutting disc (122); the hydraulic cylinder (121) is fixedly connected to the top of the fixed block (11); the hydraulic rod in the hydraulic cylinder (121) is connected to a motor; the cutting disc (122) is fixedly connected to the output shaft of the motor; the cutting disc (122) is located on a side of the fixed block (11) away from the gear disc (131); the workbench (1) is connected to a lifting platform (14) through a lifting unit; the lifting platform (14) is located on a side of the fixed block (11) rotatably connected to the gear disc (131); a group of rollers are arranged on the inner wall of the lifting platform (14); the side wall of the positioning block (134) close to the center point of the gear disc (131) is an arc wall; the positioning block (134) is provided with a first cavity (21); A group of negative pressure machines (2) are fixedly connected to the gear plate (131); a first rubber layer (22) is fixedly connected to the arc-shaped wall of the positioning block (134); a first through hole (23) is provided on the side wall of the first cavity (21) close to the arc-shaped wall of the positioning block (134); the first through hole (23) penetrates the first rubber layer (22); the negative pressure machine (2) and the first cavity (21) are connected to each other; the first through hole (23) is a gourd-shaped hole; a pair of symmetrical first grooves (3) are provided on the inner wall of the middle part of the first through hole (23); a sealing plate (31) is fixedly connected to the bottom of the first groove (3) through a spring; a group of grooves are provided on the side wall of the sealing plate (31) close to the first rubber layer (22); the first through hole (23) is provided with a plurality of grooves; A pair of symmetrically distributed support rods are fixedly connected to the side wall of the hole (23) close to the first rubber layer (22); a connecting rod (33) is hingedly connected to the side wall of the groove; a first push rod (32) is hingedly connected to the end of the connecting rod (33) away from the groove; the first push rod (32) passes through the middle of the support rod, and a first push plate (34) is fixedly connected to the end away from the connecting rod (33); a semicircular airbag (4) is fixedly connected to the side wall of the first push plate (34) away from the first push plate (34); a group of bosses (41) are fixedly connected to the outer side wall of the semicircular airbag (4); air outlet holes (42) are provided between the bosses (41), and the air outlet holes (42) are connected to the interior of the semicircular airbag (4); a group of second cavities (5) are provided in the bosses (41);A group of second push plates are fixedly connected to the side wall of the second cavity (5) close to the first push plate (34) through a spring; a top rod (51) is fixedly connected to the side wall of the second push plate away from the first push plate (34); the end of the top rod (51) away from the second push plate passes through the boss (41) and extends out of the boss (41); a group of second grooves (62) are formed on the end of the top rod (51) extending out of the boss (41); a top ball (63) is fixedly connected to the bottom of the second groove (62) through a spring; the second groove (62) is close to the opening An elastic curved membrane (64) is fixedly connected to the side wall of the support rod, and the elastic curved membrane (64) is concave in the direction of the second groove (62); a group of cleaning brushes (65) are fixedly connected to the outer wall of the elastic curved membrane (64); the first push plate (34) includes a first fixed rod (6) and a first screw (61); one end of the first fixed rod (6) is hinged to the connecting rod (33), and the other end is rotatably connected to the first screw (61); a nut is fixedly connected to the middle of the support rod, and the first screw (61) is connected to the nut; the first screw (61) is away from the fixed rod The end of the first lead screw (61) is fixedly connected to the first push plate (34); the first lead screw (61) includes a second lead screw (7) and a second fixing rod (72); one end of the second lead screw (7) is rotatably connected to the first fixing rod (6), and the other end passes through the middle of the support rod, and a third cavity (71) is opened at the end; one end of the second fixing rod (72) extends into the third cavity (71), and is fixedly connected to the side wall of the third cavity (71) close to the positioning block (134) through a spring, and the other end is fixedly connected to the first push plate (34); the third cavity (71 ) and the side wall of the end of the second fixing rod (72) extending into the third cavity (71) are both fixedly connected with a group of vibration plates (73); a group of vibration blocks are fixedly connected to the end of the vibration plate (73); a guide rod (74) is fixedly connected to the side wall of the third cavity (71) close to the positioning block (134); a guide groove (75) is fixedly connected to the end of the second fixing rod (72) extending into the third cavity (71); the guide rod (74) is slidably connected to the guide groove (75), and the guide rod (74) and the guide groove (75) are both square. ;

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