A slitter with a new type of hydraulic system

Abstract

The present invention discloses a slitter with a new hydraulic system, which relates to the technical field of slitters. Specifically, this application includes a swing motor for driving the paper roll shaft to rise and fall, a brake valve for opening the brake device of the swing motor, a three-position four-way solenoid valve that drives the swing motor to rotate forward through the hydraulic oil in the right position and drives the swing motor to rotate backward through the hydraulic oil in the left position, a two-way overflow valve for opening to convey the hydraulic oil into the hydraulic circuit and making the rise and fall of the paper roll shaft smooth when the pressure passing through the three-position four-way solenoid valve is greater than the valve opening threshold, and a balance valve for generating back pressure on the oil return circuit when the paper roll shaft stops supplying oil to the hydraulic system when it descends to a specified position, so that the paper roll shaft cannot continue to descend under the action of its own gravity. The present invention generates back pressure between the balance valve and the swing motor to prevent the swing motor from rotating, thereby preventing the paper roll shaft from continuing to descend under the action of its own gravity.

Description

Technical Field

[0001] The present invention relates to the technical field of slitting machines, and particularly to a slitting machine with a new hydraulic system. Background Art

[0002] A slitting machine is a mechanical device that slits wide-width paper, mica tape or film into multiple narrow-width materials, and is commonly used in papermaking machinery, wire and cable mica tape, and printing and packaging machinery. The slitting machine is mainly used for: slitting mica tape, paper, insulating materials and film, and is particularly suitable for slitting narrow tapes. The slitting machine mainly slits a large-drum master roll into products of different widths and has the function of inspecting the product quality. At present, when the existing roll paper slitting machine cuts the roll paper, it drives the paper roll to rotate through the roll paper shaft for cutting, and brings the cut paper roll to the trolley for unloading the roll, and then transports the cut paper roll out through the trolley. However, during the process of the roll paper shaft placing the roll paper on the unloading trolley and the unloading trolley moving the roll paper out, the roll paper shaft will drop under the action of gravity, wearing the plastic core in the center of the roll paper, thereby reducing the quality of the roll paper and affecting the use effect of the roll paper.

[0003] Chinese Patent CN210064687U, published on February 14, 2020, discloses a double-layer multi-functional paper roll slitting machine, including a unwind group, a floating roller, a paper spreading roller, a guiding roller, an upper knife and a lower knife, a paper pressing roller, and a winding part; the key points of its technical solution are that through double-layer slitting and rewinding, the winding part is set as a double winding shaft at the upper end and a single winding shaft at the lower end, and the winding shafts are all driven by separate motors. At the same time, an upper unwind and a lower unwind are set at the unwind part. The upper and lower unwinds are both driven passively and are linked with the upper and lower winding parts at the front end. There are magnetic powder brake mechanisms at the left ends of the upper and lower unwind mechanisms; the upper and lower unwind mechanisms can be operated by one person; the purpose of improving efficiency, saving labor, and achieving high output is achieved; the double-layer slitting machine adopts the integration of the front and rear vehicles, achieving the purpose of small occupied space and optimized structure. However, both the upper and lower unwinds of this paper roll slitting machine are driven passively. When the cut roll paper is transported out by the paper unloading cart, the roll paper shaft will drop under the action of gravity, wearing the plastic core in the center of the roll paper, thereby reducing the quality of the roll paper and affecting the use effect of the roll paper. Summary of the Invention

[0004] The purpose of the present invention is to provide a slitting machine with a new hydraulic system, which can prevent the roll paper shaft from dropping under the action of gravity during the process of the unloading trolley moving out with the roll paper, aiming at the deficiencies of the above-mentioned existing technologies.

[0005] The present invention provides a slitter with a new type of hydraulic system, which includes a swing motor for driving the paper roll shaft to rise during its forward rotation and driving the paper roll shaft to descend during its reverse rotation, a brake valve for delivering hydraulic oil to the swing motor and opening the brake device of the swing motor, a three-position four-way solenoid valve for driving the swing motor to rotate forward through the hydraulic oil in the right position to make the paper roll shaft perform a rising movement, and driving the swing motor to rotate in reverse through the hydraulic oil in the left position to make the paper roll shaft perform a descending movement, a two-way overflow valve for opening and delivering the hydraulic oil to the return oil circuit when the hydraulic oil pressure passing through the three-position four-way solenoid valve is greater than the valve opening threshold value, so as to make the rising and falling of the paper roll shaft smooth, and a balance valve for generating back pressure on the return oil circuit when the paper roll shaft descends to a specified position and stops supplying oil to the hydraulic system, so that the paper roll shaft cannot continue to descend under the action of its own gravity.

[0006] Further, it also includes an unloading cart for carrying the paper on the paper roll shaft and unloading the paper from the paper roll shaft.

[0007] Further, a first arc-shaped groove matching the outer shape of the paper is provided at the top of the unloading cart.

[0008] Further, a baffle is provided at each end of the unloading cart, and a second arc-shaped groove matching the outer shape of the paper roll shaft is provided in the middle of the baffle.

[0009] Further, a convex portion is provided at the bottom of the second arc-shaped groove, and a first spring is sleeved on the convex portion.

[0010] Further, rollers are provided at the bottom of the unloading cart.

[0011] Further, the paper roll shaft includes a plastic core for inserting the paper and driving the paper to move, a load-bearing portion, a connecting portion connected to the load-bearing portion through a mounting flange, a second spring connected to one end of the connecting portion, and a brake pad connected to the other end of the second spring for restricting the rotation of the paper roll shaft.

[0012] Further, there are four second springs evenly distributed on the brake pad.

[0013] Further, the second spring is a disc spring.

[0014] The slitter with a new type of hydraulic system of the present invention has the following beneficial effects:

[0015] (1) Due to long-term use, the braking device of this slitter will be worn, so the braking force will decrease, resulting in malfunctions. At this time, when the swing motor drives the paper roll shaft to descend to the specified position, after the brake valve receives an electrical signal, it drives the hydraulic oil directly into the swing motor to open the braking device of the swing motor and prevent the swing motor from rotating. However, due to malfunctions in the braking device, it cannot prevent the swing motor from rotating. At this time, originally, the three-position four-way solenoid valve receives a negative signal, and the left position of the three-position four-way solenoid valve works to drive the swing motor to reverse and drive the paper roll shaft to descend. When the brake valve receives an electrical signal, it no longer sends an electrical signal to the three-position four-way solenoid valve, that is, it no longer supplies oil to the oil inlet passage that passes through the left position of the three-position four-way solenoid valve and directly reaches the B port of the swing motor. At this time, the pressure in the return oil passage flowing out from the A port of the swing motor and flowing back to the fuel tank through the overflow valve in the balance valve cannot push open the valve of the overflow valve, so the hydraulic oil that cannot flow out between the balance valve and the swing motor generates back pressure to prevent the swing motor from rotating, and further prevents the paper roll shaft from continuing to descend under its own gravity, preventing it from wearing the plastic core at the center of the wound paper.

[0016] (2) This slitter also includes an unwinding trolley for carrying the wound paper on the paper roll shaft and unloading the wound paper from the paper roll shaft. The unwinding trolley is placed on the unwinding platform. When the paper roll shaft brings the slit wound paper to the unwinding platform, the wound paper is directly placed on the unwinding trolley. Since the other end of the paper roll shaft does not fix the wound paper, when the unwinding trolley is moved outwards, it can drive the wound paper to separate from the paper roll shaft, thus transporting the slit wound paper out.

[0017] (3) The top of the unwinding trolley of this slitter is provided with a first circular arc-shaped groove that matches the shape of the wound paper. The wound paper is a disc-shaped paper roll. When the swing motor drives the paper roll shaft to descend to the specified position, the slit wound paper is still sleeved on the paper roll shaft at this time, and the bottom of the wound paper falls on the top of the unwinding trolley and matches the first circular arc-shaped groove provided on the top of the unwinding trolley. The reason for setting the first circular arc-shaped groove that matches the shape of the wound paper on the top of the unwinding trolley is to prevent the unwinding trolley from squeezing the wound paper when the bottom of the wound paper falls on the top of the unwinding trolley, which affects the quality of the wound paper. At the same time, it is also to better limit the wound paper and prevent the wound paper from falling off the unwinding trolley.

[0018] (4) A baffle is provided at each end of the unwinding trolley of the slitter. A second arc-shaped groove that matches the outer shape of the paper roll shaft is provided in the middle of the baffle. A baffle is provided at each end of the unwinding trolley, and a second arc-shaped groove that matches the outer shape of the load-bearing part of the paper roll shaft is provided in the middle of the baffle. When the swing motor drives the paper roll shaft to descend to the specified position, the bottom of the reel paper lands on the top of the unwinding trolley and mates with the first arc-shaped groove provided on the top of the unwinding trolley. The load-bearing part of the paper roll shaft falls into the second arc-shaped grooves on both sides of the baffle. Since the diameter of the reel paper is larger than that of the paper roll shaft, the bottom of the first arc-shaped groove should be lower than the bottom of the second arc-shaped groove to prevent the load-bearing part of the paper roll shaft from touching the top of the unwinding trolley before it stops descending while still in the second arc-shaped groove. The purpose of setting the baffle is to facilitate the movement of the unwinding trolley outwards, driving the reel paper to disengage from the paper roll shaft. Because at this time, the reel paper is sleeved on the paper roll shaft, and there will be friction between the plastic core of the reel paper and the paper roll shaft, preventing the reel paper from disengaging from the paper roll shaft. When the bottom of the reel paper lands on the top of the unwinding trolley, the baffles at both ends of the unwinding trolley limit both sides of the reel paper. Therefore, when the unwinding trolley moves outwards, it will drive all the reel paper to disengage from the paper roll shaft, and there will be no phenomenon that the reel paper cannot fall off;

[0019] (5) A protrusion is provided at the bottom of the second arc-shaped groove of the slitter, and a first spring is sleeved on the protrusion. A protrusion is provided at the bottom of the second arc-shaped groove, and a first spring is sleeved on the protrusion. During the process of the paper roll shaft driving the reel paper to descend onto the unwinding trolley, the swing motor drives the paper roll shaft to descend to the specified position. In this application, there is no intuitive control method for the specified position. It is only possible to stop the rotation of the swing motor when seeing that the bottom of the reel paper lands on the top of the unwinding trolley. However, this method cannot intuitively judge the timing of stopping the machine, and there is a reaction time after seeing that the bottom of the reel paper lands on the top of the unwinding trolley. During this period, the paper roll shaft drives the reel paper to continue descending, which will cause the unwinding trolley to squeeze the reel paper and damage the reel paper. Therefore, a first spring is provided at the bottom of the second arc-shaped groove. When the load-bearing part of the paper roll shaft lands in the second arc-shaped groove and contacts the first spring, causing the first spring to deform, the rotation of the swing motor is immediately stopped. At this time, there is still a certain distance between the load-bearing part of the paper roll shaft and the bottom of the second arc-shaped groove, and there is also a certain distance between the bottom of the reel paper and the top of the unwinding trolley. This provides sufficient reaction time for operating to stop the rotation of the swing motor, and also makes the timing of stopping the machine have a more intuitive manifestation by seeing the first spring start to deform. At the same time, after stopping the rotation of the swing motor, the elastic force of the first spring will also prevent the paper roll shaft from continuing to descend under its own gravity;

[0020] (6) The bottom of the unwinding trolley of the slitter is provided with rollers, and the unwinding platform is provided with a chute for the unwinding trolley to roll. Through the rollers at the bottom of the unwinding trolley, the movement of the unwinding trolley on the unwinding platform is realized. The chute for the unwinding trolley to roll is provided on the unwinding platform to provide a track for the unwinding trolley, facilitate the rolling of the rollers, and at the same time limit the rollers, so that the unwinding trolley moves along the chute and prevents it from falling off the unwinding platform;

[0021] (7) The paper roll shaft of the slitter includes a plastic core for inserting into the web paper and a load-bearing part for driving the movement of the paper roll, a connecting part connected to the load-bearing part through a mounting flange, a second spring with one end connected to the connecting part, and a brake pad connected to the other end of the second spring for restricting the rotation of the paper roll shaft. The load-bearing part that inserts into the plastic core of the web paper drives the web paper to rise and fall. The load-bearing part is connected to the connecting part through a mounting flange. A second spring is provided on the connecting part, and the other end of the second spring is connected to the brake pad. Through the acting force of the second spring, the brake pads are rubbed against each other, thereby braking the paper roll shaft;

[0022] (8) The second spring of the slitter is a disc spring. Because the disc spring has the characteristics of large stiffness, strong buffering and vibration absorption ability, and can bear large loads with small deformations, it is suitable for occasions with small axial space requirements. In this embodiment, when the brake pad brakes the paper roll shaft, the displacement distance is small, and at the same time, the load transmitted to the second spring is large. Therefore, the working occasion of the second spring is a place with a small axial space and needs to bear large loads with small deformations. Therefore, it is more appropriate to use a disc spring. Description of the Drawings

[0023] The drawings incorporated into the specification and forming a part of the specification illustrate embodiments of the present invention and are used together with the description to explain the principles of the present invention. In these drawings, like reference numerals are used to represent like elements.

[0024] Figure 1 It is the hydraulic schematic diagram of a slitter with a new type of hydraulic system according to an embodiment of the present invention;

[0025] Figure 2 It is the front view of a slitter with a new type of hydraulic system according to an embodiment of the present invention;

[0026] Figure 3 It is the top view of a slitter with a new type of hydraulic system according to an embodiment of the present invention;

[0027] Figure 4 It is the structural schematic diagram of the paper roll shaft of a slitter with a new type of hydraulic system according to an embodiment of the present invention;

[0028] Figure 5 It is the structural schematic diagram of the unwinding trolley of a slitter with a new type of hydraulic system according to an embodiment of the present invention.

[0029] In the figure: 1, paper roll shaft; 11, load-bearing part; 12, mounting flange; 13, connecting part; 14, second spring; 15, brake pad; 2, swing motor; 3, brake valve; 4, three-position four-way solenoid valve; 5, two-way overflow valve; 6, balance valve; 7, web; 8, uncoiler carriage; 81, first arc-shaped groove; 82, baffle; 83, second arc-shaped groove; 84, first spring; 85, roller; 9, uncoiling platform. Specific implementation manner

[0030] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0031] Please refer to Figures 1 to 5 , a slitter of a novel hydraulic system according to an embodiment of the present invention includes a swing motor 2 for driving the paper roll shaft 1 to rise when it rotates forward and driving the paper roll shaft 1 to fall when it rotates backward, a brake valve 3 for delivering hydraulic oil to the swing motor 2 and opening the brake device of the swing motor 2, a three-position four-way solenoid valve 4 for driving the swing motor 2 to rotate forward by the hydraulic oil in the right position to make the paper roll shaft 1 perform a rising movement and driving the swing motor 2 to rotate backward by the hydraulic oil in the left position to make the paper roll shaft 1 perform a falling movement, a two-way overflow valve 5 for opening and delivering the hydraulic oil to the return oil circuit when the hydraulic oil pressure passing through the three-position four-way solenoid valve 4 is greater than the valve opening threshold value to make the rising and falling of the paper roll shaft 1 smooth, and a balance valve 6 for generating back pressure in the return oil circuit when the hydraulic oil supply to the hydraulic system stops when the paper roll shaft 1 falls to a specified position to prevent the paper roll shaft 1 from continuing to fall under the action of its own gravity.

[0032] When the three-position four-way solenoid valve 4 receives a positive signal, the right position of the three-position four-way solenoid valve 4 works. The oil inlet path of the hydraulic oil is as follows: through the right position of the three-position four-way solenoid valve 4, it reaches port A of the swing motor 2 through the check valve in the balance valve 6; the oil return path is: it flows back to the fuel tank from port B of the swing motor 2, driving the swing motor 2 to rotate forward, thereby driving the paper roll shaft 1 to perform a rising movement. After the paper roll shaft 1 rises normally for a period of time, due to continuous oil supply to the oil inlet path, when the pressure in the oil inlet path is greater than the opening threshold of the two-way overflow valve 5, the two-way overflow valve 5 opens, and the oil inlet path is connected to the oil return path. A part of the hydraulic oil passing through the right position of the three-position four-way solenoid valve 4 enters the oil return path through the right position of the two-way overflow valve 5, preventing the swing motor 2 from rotating too fast, so that the rising of the paper roll shaft 1 is smoother; when the three-position four-way solenoid valve 4 receives a negative signal, the left position of the three-position four-way solenoid valve 4 works. The oil inlet path of the hydraulic oil is as follows: through the left position of the three-position four-way solenoid valve 4, it directly reaches port B of the swing motor 2; the oil return path is: it flows out from port A of the swing motor 2 and flows back to the fuel tank through the overflow valve in the balance valve 6, driving the swing motor 2 to rotate reversely, thereby driving the paper roll shaft 1 to perform a descending movement. After the paper roll shaft 1 descends normally for a period of time, due to continuous oil supply to the oil inlet path, when the pressure in the oil inlet path is greater than the opening threshold of the two-way overflow valve 5, the two-way overflow valve 5 opens, and the oil inlet path is connected to the oil return path. A part of the hydraulic oil passing through the left position of the three-position four-way solenoid valve 4 enters the oil return path through the left position of the two-way overflow valve 5, preventing the swing motor 2 from rotating too fast, so that the descending of the paper roll shaft 1 is smoother. When the paper roll shaft 1 of this slitter needs to be braked, an electrical signal is sent to the brake valve 3. After receiving the electrical signal, the brake valve 3 drives the hydraulic oil directly to the swing motor 2, opens the brake device of the swing motor, and prevents the swing motor from rotating, thereby braking the paper roll shaft 1 of the slitter.

[0033] Due to long-term use, the braking device will experience wear, so the braking force will decrease, resulting in a malfunction. At this time, when the swing motor 2 drives the paper roll shaft 1 to descend to a specified position, after the brake valve 3 receives an electrical signal, it drives the hydraulic oil directly into the swing motor 2 to open the braking device of the swing motor and prevent the swing motor 2 from rotating. However, due to a malfunction of the braking device, it is unable to prevent the swing motor 2 from rotating. At this time, originally, the three-position four-way solenoid valve 4 receives a negative signal, and the left position of the three-position four-way solenoid valve 4 works to drive the swing motor 2 to reverse and drive the paper roll shaft 1 to descend. When the brake valve 3 receives an electrical signal, it no longer sends an electrical signal to the three-position four-way solenoid valve 4, that is, it no longer supplies oil to the oil inlet passage that passes through the left position of the three-position four-way solenoid valve 4 and directly reaches the B port of the swing motor 2. At this time, the pressure in the return oil passage that flows out from the A port of the swing motor 2 and returns to the oil tank through the overflow valve in the balance valve 6 cannot push open the valve of the overflow valve, so that the hydraulic oil that cannot flow out between the balance valve 6 and the swing motor 2 in the return oil passage generates back pressure to prevent the swing motor 2 from rotating, and further prevents the paper roll shaft 1 from continuing to descend under the action of its own gravity and prevents it from wearing the plastic core in the center of the paper web 7.

[0034] In this embodiment, the brake valve 3 and the three-position four-way solenoid valve 4 are connected in parallel on the oil circuit. The brake valve 3 brakes the swing motor 2 by directly delivering the hydraulic oil to the swing motor 2 to open the braking device of the swing motor 2, while the three-position four-way solenoid valve 4 drives the swing motor 2 to rotate by delivering the hydraulic oil to the swing motor 2, thereby driving the paper roll shaft 1 to rise or fall. Therefore, when the brake valve 3 brakes the swing motor 2, the three-position four-way solenoid valve 4 should be in a non-operating state, and when the three-position four-way solenoid valve 4 drives the swing motor 2, the brake valve 3 should also be in a non-operating state. So the brake valve 3 and the three-position four-way solenoid valve 4 are connected in parallel on the oil circuit.

[0035] In this embodiment, the three-position four-way solenoid valve 4 and the balance valve 6 are connected in series on the oil circuit. The function of the balance valve 6 is that after the paper roll shaft 1 descends to a specified position, the electrical signal to the three-position four-way solenoid valve 4 is stopped. At this time, the hydraulic system no longer drives the swing motor 2 to rotate, but the self-weight of the paper roll shaft 1 is transmitted to the swing motor 2, which will drive the swing motor 2 to rotate. When there is no longer oil supply in the hydraulic system, the pressure in the return oil passage is not sufficient to push open the valve of the balance valve 6. Therefore, the hydraulic oil between the balance valve 6 and the swing motor 2 in the return oil passage cannot flow out, thereby generating back pressure to prevent the swing motor 2 from rotating, and further preventing the paper roll shaft 1 from continuing to descend under the action of its own gravity. So the balance valve 6 also works in cooperation with the three-position four-way solenoid valve 4.

[0036] In this embodiment, it further includes an unwinding trolley 8 for carrying the web paper 7 on the web paper shaft 1 and unloading the web paper 7 from the web paper shaft 1. The unwinding trolley 8 is placed on an unwinding platform 9. When the web paper shaft 1 brings the cut web paper 7 to the unwinding platform 9, the web paper 7 is directly placed on the unwinding trolley 8. Since the other end of the web paper shaft 1 does not fix the web paper 7, when the unwinding trolley 8 is moved outwards, the web paper 7 can be driven to disengage from the web paper shaft 1, thereby transporting the cut web paper 7 out.

[0037] A first arc-shaped groove 81 matching the outer shape of the web paper 7 is provided at the top of the unwinding trolley 8. The web paper 7 is a disk-shaped paper roll. When the swing motor 2 drives the web paper shaft 1 to descend to a specified position, the cut web paper 7 is still sleeved on the web paper shaft 1 at this time. The bottom of the web paper 7 falls on the top of the unwinding trolley 8 and matches the first arc-shaped groove 81 provided at the top of the unwinding trolley 8. The reason for providing the first arc-shaped groove 81 matching the outer shape of the web paper 7 at the top of the unwinding trolley 8 is to prevent the unwinding trolley 8 from squeezing the web paper 7 when the bottom of the web paper 7 falls on the top of the unwinding trolley 8, which may affect the quality of the web paper 7. At the same time, it is also to better limit the web paper 7 and prevent the web paper 7 from falling off the unwinding trolley 8.

[0038] A baffle 82 is provided at each end of the unwinding trolley 8, and a second arc-shaped groove 83 matching the outer shape of the web paper shaft 1 is provided in the middle of the baffle 82. A baffle 82 is provided at each end of the unwinding trolley 8, and a second arc-shaped groove 83 matching the outer shape of the load-bearing part 11 of the web paper shaft 1 is provided in the middle of the baffle 82. When the swing motor 2 drives the web paper shaft 1 to descend to a specified position, the bottom of the web paper 7 falls on the top of the unwinding trolley 8 and matches the first arc-shaped groove 81 provided at the top of the unwinding trolley 8. The load-bearing part 11 of the web paper shaft 1 falls into the second arc-shaped grooves 83 on both sides of the baffle 82. Since the diameter of the web paper 7 is larger than the diameter of the web paper shaft 1, the bottom of the first arc-shaped groove 81 is lower than the bottom of the second arc-shaped groove 83 to prevent the load-bearing part 11 of the web paper shaft 1 from contacting the top of the unwinding trolley 8 before it stops descending while falling into the second arc-shaped groove 83. The purpose of setting the baffle 82 is to facilitate the removal of the unwinding trolley 8 outwards, driving the web paper 7 to disengage from the web paper shaft 1. Because at this time the web paper 7 is sleeved on the web paper shaft 1, and there will be a frictional force between the plastic core of the web paper 7 and the web paper shaft 1, preventing the web paper 7 from disengaging from the web paper shaft 1. When the bottom of the web paper 7 falls on the top of the unwinding trolley 8, the baffles 82 at both ends of the unwinding trolley 8 limit both sides of the web paper 7. Therefore, when the unwinding trolley 8 is moved outwards, all the web paper 7 will be driven to disengage from the web paper shaft 1, and there will be no phenomenon that the web paper 7 cannot fall off.

[0039] A convex part is provided at the bottom of the second arc-shaped groove 83, and a first spring 84 is sleeved on the convex part. A convex part is provided at the bottom of the second arc-shaped groove 83, and a first spring 84 is sleeved on the convex part. During the process of the paper roll shaft 1 driving the web 7 to descend onto the unloading trolley 8, the swing motor 2 drives the paper roll shaft 1 to descend to a specified position. In this application, there is no intuitive control method for the specified position. It is only possible to stop the rotation of the swing motor 2 when seeing that the bottom of the web 7 lands on the top of the unloading trolley 8. However, this method cannot intuitively judge the timing of stopping the machine, and there is a reaction time after seeing that the bottom of the web 7 lands on the top of the unloading trolley 8. During this period, the paper roll shaft 1 drives the web 7 to continue to descend, which will cause the unloading trolley 8 to squeeze the web 7 and damage the web 7. Therefore, a first spring 84 is provided at the bottom of the second arc-shaped groove 83. When the bearing part 11 of the paper roll shaft 1 falls into the second arc-shaped groove 83 and contacts the first spring 84, causing the first spring 84 to deform, the rotation of the swing motor 2 is immediately stopped. At this time, there is still a certain distance between the bearing part 11 of the paper roll shaft 1 and the bottom of the second arc-shaped groove 83, and there is also a certain distance between the bottom of the web 7 and the top of the unloading trolley 8. This provides sufficient reaction time for operating to stop the rotation of the swing motor 2, and seeing that the first spring 84 begins to deform and then stopping the machine also makes the timing of stopping the machine have a more intuitive manifestation. At the same time, after stopping the rotation of the swing motor 2, the elastic force of the first spring 84 will also play a role in preventing the paper roll shaft 1 from continuing to descend under the action of its own gravity.

[0040] Rollers 85 are provided at the bottom of the unloading trolley 8, and a chute for the unloading trolley 8 to roll is provided on the unloading platform 9. Through the rollers 85 at the bottom of the unloading trolley 8, the movement of the unloading trolley 8 on the unloading platform 9 is realized. And a chute for the unloading trolley 8 to roll is provided on the unloading platform 9 to provide a track for the unloading trolley 8, facilitate the rolling of the rollers 85, and at the same time limit the rollers 85, so that the unloading trolley 8 moves along the chute to prevent it from falling off the unloading platform 9.

[0041] The paper roll shaft 1 includes a plastic core for inserting the web 7 and a bearing part 11 for driving the web 7 to move, a connecting part 13 connected to the bearing part 11 through a mounting flange 12, a second spring 14 connected to one end of the connecting part 13, and a brake pad 15 connected to the other end of the second spring 14 and used to limit the rotation of the paper roll shaft 1. The bearing part 11 that inserts the plastic core of the web 7 drives the web 7 to rise and fall. The bearing part 11 is connected to the connecting part 13 through the mounting flange 12. A second spring 14 is provided on the connecting part 13, and the other end of the second spring 14 is connected to the brake pad 15. The brake pads 15 are rubbed against each other under the action of the second spring 14, thereby braking the paper roll shaft 1.

[0042] In this embodiment, there are four second springs 14 evenly distributed on the brake pads 15. The four second springs 14 between the brake pads 15 and the connecting portion 13 are arranged to be evenly distributed in order to strengthen the friction between the brake pads 15 and make the braking effect of the brake pads 15 better. The even distribution of the second springs 14 is to evenly transfer the acting force of the second springs 14 to the brake pads 15, so that the friction of the brake pads 15 is more uniform and the service life of the brake pads 15 is prolonged.

[0043] The second spring 14 is a disc spring. Because the disc spring has the characteristics of large stiffness, strong buffering and vibration absorption ability, and can withstand large loads with small deformation, it is suitable for occasions with small axial space requirements. In this embodiment, when the brake pads 15 brake the paper winding shaft 1, the displacement distance is small, and at the same time, the load transmitted to the second spring 14 is large. Therefore, the working occasion of the second spring 14 is a place with a small axial space and needs to withstand large loads with small deformation. Therefore, it is more appropriate to use a disc spring.

[0044] The content described above can be implemented alone or in various combinations, and these variant ways are all within the protection scope of the present invention.

[0045] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or device including the element.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A slitter of a new type of hydraulic system, characterized in that: It includes a swing motor (2) for driving the paper roll shaft (1) to rise when it rotates forward and driving the paper roll shaft (1) to descend when it rotates reversely, a brake valve (3) for delivering hydraulic oil to the swing motor (2) and opening the brake device of the swing motor (2), a three-position four-way solenoid valve (4) for driving the swing motor (2) to rotate forward by the hydraulic oil in the right position to make the paper roll shaft (1) perform a rising movement and driving the swing motor (2) to rotate reversely by the hydraulic oil in the left position to make the paper roll shaft (1) perform a descending movement, a two-way overflow valve (5) for opening and delivering the hydraulic oil to the return oil circuit when the hydraulic oil pressure passing through the three-position four-way solenoid valve (4) is greater than the valve opening threshold value to make the rising and descending of the paper roll shaft (1) smooth, and a balance valve (6) for generating back pressure on the return oil circuit when the paper roll shaft (1) descends to a specified position and stops supplying oil to the hydraulic system to prevent the paper roll shaft (1) from continuing to descend under the action of its own gravity; The brake valve (3) and the three-position four-way solenoid valve (4) are connected in parallel on the oil circuit. The three-position four-way solenoid valve (4) is connected to the two-way overflow valve (5). The two-way overflow valve (5) is connected to the balance valve (6). The balance valve (6) is connected to the swing motor (2). The brake valve (3) is connected to the brake device in the swing motor (2); It further includes an unwinding trolley (8) for carrying the paper on the paper roll shaft (1) and unloading the paper from the paper roll shaft (1); The top of the unwinding trolley (8) is provided with a first arc-shaped groove (81) matching the shape of the paper (7); The paper roll shaft (1) includes a load-bearing part (11) for inserting the plastic core of the paper (7) and driving the paper (7) to move, a connecting part (13) connected to the load-bearing part (11) through a mounting flange (12), a second spring (14) with one end connected to the connecting part (13), and a brake pad (15) connected to the other end of the second spring (14) for restricting the rotation of the paper roll shaft (1).

2. The slitter of a new hydraulic system as described in claim 1, characterized in that: Both ends of the unwinding trolley (8) are provided with a baffle (82), and the middle of the baffle (82) is provided with a second arc-shaped groove (83) matching the shape of the paper roll shaft (1).

3. The slitter of a new hydraulic system as described in claim 2, characterized in that: The bottom of the second arc-shaped groove (83) is provided with a protrusion, and a first spring (84) is sleeved on the protrusion; 4. A slitter of a new type of hydraulic system as described in claim 1, characterized in that: The bottom of the unwinding trolley (8) is provided with rollers (85); 5. A slitter of a new type of hydraulic system as described in claim 1, characterized in that: There are four of the second springs (14) evenly distributed on the brake pads (15); 6. The slitter of a new hydraulic system as described in claim 1, characterized in that: The second spring (14) is a disc spring.

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