Cylinder buffer device for paper machine reel change

Abstract

The utility model provides a kind of cylinder buffer device for paper machine roll change, including power system, buffer system and with the buffer system connection execution system, the execution system is used to accept the paper roll being changed down, the buffer system is used to provide buffer to the execution system, the buffer system includes and is arranged multiple buffer oil circuit side by side, the buffer oil circuit includes: oil cylinder, reversing valve, check valve and overflow valve;Two working oil ports of the reversing valve are connected the rod cavity of the oil cylinder, rod cavity respectively;The check valve is arranged between the reversing valve and the oil cylinder;The overflow valve is arranged between the check valve and the oil cylinder, and located on the oil circuit between the check valve and the rod cavity.It is when paper roll pushes out, so that rod cavity is impacted after, rod cavity is overflowed by overflow valve on oil circuit with load jining and is unloaded to return oil pipe and flows into oil tank, to reach the effect of buffering.

Description

Technical Field

[0001] This utility model relates to the technical field of paper machine roll changing buffer equipment, specifically to a hydraulic cylinder buffer device for paper machine roll changing. Background Technology

[0002] Paper production equipment is a general term for a complete set of equipment that links different sections of the pulp to form paper webs. Among them, the paper winding machine is the end point of paper production and is used to wind the paper web into rolls. After the paper roll is wound to a predetermined size, it needs to be replaced and a new empty roll is installed for winding.

[0003] During the process of replacing the paper roller, it is necessary to receive the paper roller. In order to avoid damage to the paper roller, the paper roller below needs to be cushioned to reduce the impact force due to its weight after the paper roller is removed.

[0004] Currently, the cushioning and support of paper rollers is achieved using a cylinder system. However, with the increasing demands of production, the speed of papermaking machines is constantly rising, leading to a continuous increase in the load and operating frequency of the cylinders. This makes them prone to damage, shortening their service life from once every two years to once a year, or even once every six months. Furthermore, large cylinders are difficult to repair, have high maintenance costs, long replacement times, and can even disrupt normal production.

[0005] Therefore, a new technical solution is urgently needed to solve at least one of the above-mentioned technical problems. Utility Model Content

[0006] The purpose of this utility model is to provide a hydraulic cylinder buffer device for paper machine roll changing, in order to solve at least one of the above-mentioned technical problems. The utility model adopts the following technical solution:

[0007] A hydraulic cylinder buffer device for paper machine roll changing includes a power system, a buffer system, and an execution system connected to the buffer system. The execution system receives the paper roll being changed, and the buffer system provides buffering for the execution system. The buffer system includes multiple buffer oil passages arranged side by side, and the buffer oil passages include:

[0008] A hydraulic cylinder, wherein the piston rod of the hydraulic cylinder is connected to the actuator for transmission.

[0009] A reversing valve, wherein the two working ports of the reversing valve are respectively connected to the rodless chamber and the rod chamber of the hydraulic cylinder;

[0010] A one-way valve is disposed between the directional valve and the cylinder, and includes two valves respectively in oil lines communicating with the rodless chamber and the rod chamber;

[0011] An overflow valve is provided between the check valve and the oil cylinder, and is located in the oil line between the check valve and the rodless chamber, and the oil outlet of the overflow valve is connected to the oil tank.

[0012] Furthermore, the two check valves are two-position hydraulically controlled check valves. The two oil inlets of the two-position hydraulically controlled check valves are respectively connected to the two working oil ports of the reversing valve, and the two oil outlets are respectively connected to the rod chamber and the rodless chamber of the cylinder.

[0013] Furthermore, the reversing valve is configured as a Y-type three-position four-way solenoid reversing valve, and a pressure reducing valve is provided on the oil line connecting the oil inlet of the reversing valve to the oil tank.

[0014] Furthermore, a first one-way throttle valve is provided between the reversing valve and the one-way valve, and the one-way throttle valve has two ports that are respectively connected to the two working ports of the reversing valve.

[0015] Furthermore, a second one-way throttle valve is also provided on the oil circuit connecting the one-way valve and the rod chamber of the oil cylinder, and the oil outlet of the second one-way throttle valve is connected to the rod chamber of the oil cylinder.

[0016] Furthermore, the overflow valve is configured as a stacked overflow valve, and the oil outlet of the stacked overflow valve is connected to the oil tank.

[0017] Furthermore, the oil cylinders configured on the buffer oil circuit are two cylinders arranged side by side, and the piston rods of both cylinders are tractively connected to the execution system.

[0018] The beneficial effects of this utility model are as follows:

[0019] This utility model embodiment provides a hydraulic cylinder buffer device for paper machine roll changing. After the paper machine winds the paper web into rolls, during the process of removing the paper roll and replacing it with an empty roll, the device supports the removed paper roll and buffers it through the hydraulic cylinder buffer device provided in this embodiment, thereby preventing damage to the paper roll due to the impact of gravity. In this embodiment, by configuring a hydraulic cylinder, a reversing valve, a check valve, and an overflow valve connected to the execution system, the hydraulic cylinder can be locked under the action of the check valve and the reversing valve when the reversing valve is in the neutral position. When the paper roll is pushed out, the execution system is impacted by the paper roll, so that the rodless chamber is impacted. After the rodless chamber is impacted, the load is overflowed through the overflow valve on the oil circuit and unloaded to the return oil pipe and flows back into the oil tank, thereby achieving the buffering effect. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 This is a schematic diagram of the buffer oil circuit in this utility model.

[0022] In the diagram: 100 - buffer oil circuit; 110 - cylinder; 120 - directional valve; 130 - directional valve; 140 - flow valve; 150 - pressure valve; 160 - one-way throttle valve; 170 - two-way throttle valves. Detailed Implementation

[0023] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention. The present invention will be described in detail below with reference to the accompanying drawings.

[0024] This utility model embodiment provides a hydraulic cylinder buffer device for paper machine roll changing. After the paper machine winds the paper web into rolls, during the process of removing the paper roll and replacing it with an empty roll, the device supports the removed paper roll and buffers it through the hydraulic cylinder 110 buffer device provided in this embodiment, thereby preventing damage to the paper roll due to the impact of gravity. In this embodiment, by configuring a hydraulic cylinder 110, a reversing valve 120, a one-way valve 130, and an overflow valve 140 connected to the execution system, the hydraulic cylinder 110 can be locked under the action of the one-way valve 130 and the reversing valve 120 when the reversing valve 120 is in the neutral position. When the paper roll is pushed out, the execution system is impacted by the paper roll, so that the rodless chamber is impacted. After the rodless chamber is impacted, the load is overflowed through the overflow valve 140 in the oil circuit and unloaded to the return oil pipe and flows back into the oil tank, thereby achieving the buffering effect.

[0025] like Figure 1-2 As shown in the figure, this embodiment provides a hydraulic cylinder 110 buffer device for paper machine roll changing, including a power system, a buffer system, and an execution system connected to the buffer system. The execution system is used to receive the paper roll being changed, and the buffer system is used to provide buffering for the execution system. The buffer system includes multiple buffer oil circuits 100 arranged side by side. Each buffer oil circuit 100 includes a hydraulic cylinder 110, a reversing valve 120, a check valve 130, and an overflow valve 140. The piston rod of the hydraulic cylinder 110 is connected to the execution system. The two working ports of the reversing valve 120 are respectively connected to the rodless chamber and the rod chamber of the hydraulic cylinder 110. The check valve 130 is located between the reversing valve 120 and the hydraulic cylinder 110, and includes two valves respectively connected to the oil circuits communicating with the rodless chamber and the rod chamber. The overflow valve 140 is located between the check valve 130 and the hydraulic cylinder 110, and is located on the oil circuit between the check valve 130 and the rodless chamber. The outlet of the overflow valve 140 is connected to the oil tank.

[0026] In this embodiment, the overflow valve 140 is configured as a stacked overflow valve 140, and the oil outlet of the stacked overflow valve 140 is connected to the oil tank. The stacked overflow valve 140 can control the oil pressure more precisely, thereby enabling more precise pressure relief and buffering during the impact pressure on the rodless chamber.

[0027] When the directional valve 120 is in the neutral position, the hydraulic cylinder 110 is self-locked by the directional valve 120 and the check valve 130. When the paper roll is unloaded and pushed out, it will fall onto the actuator. At this time, the rodless chamber of the hydraulic cylinder 110 is impacted, so that the hydraulic oil in the rodless chamber is unloaded through the relief valve 140 and flows back into the oil tank, thereby realizing the pressure relief of the paper roll.

[0028] In this embodiment, the two check valves 130 are dual-position hydraulically controlled check valves 130. The two inlet ports of the dual-position hydraulically controlled check valves 130 are respectively connected to the two working ports of the directional valve 120, and the two outlet ports are respectively connected to the rod chamber and rodless chamber of the cylinder 110. By configuring the two check valves 130 as dual-position hydraulically controlled check valves 130, the oil passages can be kept unobstructed during the flow of hydraulic oil to the rod chamber and rodless chamber of the cylinder 110, thereby enabling the operation of the actuator system via the cylinder 110.

[0029] In this embodiment, the reversing valve 120 is configured as a Y-type three-position four-way solenoid reversing valve 120, and a pressure reducing valve 150 is provided on the oil line connecting the oil inlet of the reversing valve 120 and the oil tank.

[0030] When the directional valve 120 is in the neutral position, it can achieve self-locking of the cylinder 110. At this time, since the oil inlet P is connected to the oil tank through the power system, there is oil pressure at the oil inlet P position. This oil pressure is relieved by the pressure reducing valve 150 and the hydraulic oil flows back into the oil tank.

[0031] In this embodiment, a first one-way throttle valve 160 is also provided between the directional valve 120 and the one-way valve 130, and the one-way throttle valve has two ports that are respectively connected to the two working ports of the directional valve 120. At the same time, a second one-way throttle valve 170 is also provided on the oil passage connecting the one-way valve 130 and the rod chamber of the cylinder 110, and the oil outlet of the second one-way throttle valve 170 is connected to the rod chamber of the cylinder 110.

[0032] By incorporating a first one-way throttle valve 160 and a second one-way throttle valve 170, a stable self-locking capability can be improved during the process of the hydraulic cylinder 110 being subjected to impact or the load of the paper roller.

[0033] In this embodiment, two hydraulic cylinders 110 are arranged side by side on the buffer oil circuit 100, and the piston rods of both hydraulic cylinders 110 are driven to the execution system. By setting two hydraulic cylinders 110 arranged side by side in a buffer oil circuit 100, the stability of supporting the execution system can be improved during the transmission connection and support process, avoiding the occurrence of unbalanced support force, which would affect the buffer support of the execution system.

[0034] The working process of the technical solution provided in this embodiment is as follows:

[0035] The power system is located between the buffer oil circuit 100 and the oil tank, and is used to transport the hydraulic oil in the oil tank to the buffer oil circuit 100 to provide buffer support for the actuator. When coil b of directional valve 120 is energized, the inlet P of directional valve 120 is connected to the working port A, and the return port T is connected to the working port B. At this time, the oil flows through the first throttle check valve 130 to the check valve 130, and the hydraulic control keeps both check valves 130 open simultaneously, allowing hydraulic oil to be delivered to the rodless chamber of cylinder 110, causing the piston rod to extend and support the actuator system. When neither coil a nor b of directional valve 120 is energized, directional valve 120 is in the neutral position. At this time, working ports A and B are connected to the return port T and to the oil tank. At this time, the cylinder 110 is in a self-locking state through check valve 130 and throttle check valve 130. When the paper roller is wound and pushed out, it falls onto the actuator system due to gravity and is impacted by gravity. When the cylinder is subjected to a load impact, the hydraulic oil in the rodless chamber of cylinder 110 is pressurized and flows back under the load impact. When the pressure reaches the overflow pressure of the relief valve 140, the hydraulic oil in the rodless chamber is unloaded by the relief valve 140 and flows back to the oil tank. The overflow of the relief valve 140 can unload the cylinder 110, thereby providing buffer support for the cylinder 110 and avoiding hard impact contact after the paper roll is pushed out, thus buffering the paper roll. When the piston rod of cylinder 110 retracts, the coil a of the reversing valve 120 is energized, so that the oil inlet P is connected to the working oil port B and the oil return port T is connected to the working oil port A. At this time, the rodless chamber of cylinder 110 is connected to the oil tank, so that after hydraulic oil is introduced into the rod chamber, the piston rod can retract into the cylinder body of cylinder 110.

[0036] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make some changes or modifications to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the present utility model without departing from the scope of the present utility model shall fall within the scope of the present utility model.

Claims

1. A hydraulic cylinder buffer device for paper machine roll changing, comprising a power system, a buffer system, and an execution system connected to the buffer system, wherein the execution system is used to receive the paper roll being changed, and the buffer system is used to provide buffering for the execution system, characterized in that, The buffer system includes multiple buffer oil passages arranged side by side, and the buffer oil passages include: A hydraulic cylinder, wherein the piston rod of the hydraulic cylinder is connected to the actuator for transmission. A reversing valve, wherein the two working ports of the reversing valve are respectively connected to the rodless chamber and the rod chamber of the hydraulic cylinder; A one-way valve is disposed between the directional valve and the cylinder, and includes two valves respectively in oil lines communicating with the rodless chamber and the rod chamber; An overflow valve is provided between the check valve and the oil cylinder, and is located in the oil line between the check valve and the rodless chamber, and the oil outlet of the overflow valve is connected to the oil tank.

2. The hydraulic cylinder buffer device for paper machine roll changing according to claim 1, characterized in that, The two check valves are two-position hydraulically controlled check valves. The two oil inlets of the two-position hydraulically controlled check valves are respectively connected to the two working oil ports of the reversing valve, and the two oil outlets are respectively connected to the rod chamber and the rodless chamber of the cylinder.

3. The hydraulic cylinder buffer device for paper machine roll changing according to claim 2, characterized in that, The reversing valve is configured as a Y-type three-position four-way solenoid reversing valve, and a pressure reducing valve is installed on the oil line connecting the oil inlet of the reversing valve to the oil tank.

4. The hydraulic cylinder buffer device for paper machine roll changing according to claim 3, characterized in that, A first one-way throttle valve is also provided between the reversing valve and the one-way valve, and the one-way throttle valve has two ports that are respectively connected to the two working ports of the reversing valve.

5. The hydraulic cylinder buffer device for paper machine roll changing according to claim 2, characterized in that, A second one-way throttle valve is also provided on the oil circuit connecting the one-way valve to the rod chamber of the oil cylinder, and the oil outlet of the second one-way throttle valve is connected to the rod chamber of the oil cylinder.

6. The hydraulic cylinder buffer device for paper machine roll changing according to claim 1, characterized in that, The overflow valve is configured as a stacked overflow valve, and the oil outlet of the stacked overflow valve is connected to the oil tank.

7. The cylinder buffer device for paper machine roll change according to claim 1, characterized in that, The oil cylinders configured on the buffer oil circuit are two cylinders arranged side by side, and the piston rods of both cylinders are tractively connected to the actuation system.

Images