Papermaking rewinder and hydraulic system

Abstract

The utility model provides a papermaking rewinding machine and a hydraulic system. The hydraulic system comprises a first pressure reducing valve, a first one-way valve and a first single electric control two-position four-way electromagnetic valve. Wherein the first pressure reducing valve is connected with an oil inlet pipeline and the first single-electric-control two-position four-way electromagnetic valve, the first one-way valve is arranged between the first single-electric-control two-position four-way electromagnetic valve and an oil return pipeline, and one-way connection of the first single-electric-control two-position four-way electromagnetic valve to the oil return pipeline is achieved. And the first single electric control two-position four-way electromagnetic valve is connected with a first device to be driven. According to the hydraulic system provided by the embodiment of the invention, by arranging the one-way valve, oil return pressure interference generated when other systems act during oil return can be avoided, and the problem that braking is uncontrollable due to the fact that braking is closed when other systems return oil is solved.

Description

Technical Field

[0001] This application relates to the technical field of hydraulic control of papermaking equipment, and specifically relates to a paper rewinder and a hydraulic system for the same. Background Art

[0002] In the paper roll hydraulic control device of a conventional paper rewinder, when the whole machine loses power, it cannot brake, and the paper roll continues to unwind, resulting in a large amount of waste of paper. In addition, when other mechanisms operate in the non-braking state, the return oil will build up pressure, and this pressure can cause the brake to close, resulting in uncontrollable braking. Utility Model Content

[0003] In the first aspect of the embodiments of this application, a hydraulic system is provided. The hydraulic system includes: a first pressure reducing valve, a first one-way valve, and a first single-electrically controlled two-position four-way solenoid valve. Among them, the first pressure reducing valve is respectively connected to the oil inlet pipeline and the first single-electrically controlled two-position four-way solenoid valve. The first one-way valve is arranged between the first single-electrically controlled two-position four-way solenoid valve and the return oil pipeline, and realizes the one-way conduction of the first single-electrically controlled two-position four-way solenoid valve to the return oil pipeline. The first single-electrically controlled two-position four-way solenoid valve is connected to a first device to be driven.

[0004] In some embodiments, a first manual valve is further arranged between the first single-electrically controlled two-position four-way solenoid valve and the first device to be driven.

[0005] In some embodiments, the hydraulic system further includes an energy storage device, and the energy storage device is respectively connected to the oil inlet pipeline and the return oil pipeline.

[0006] In some embodiments, the energy storage device includes an accumulator and an energy storage safety valve group. The accumulator is connected to the oil inlet pipeline and the return oil pipeline through the energy storage safety valve group.

[0007] In some embodiments, the energy storage safety valve group includes a first stop valve, a second stop valve, and an overflow valve. Two ends of the first stop valve are respectively connected to the oil inlet pipeline and the accumulator. Two ends of the second stop valve are respectively connected to the return oil pipeline and the accumulator. The overflow valve is connected in parallel with the second stop valve.

[0008] In some embodiments, the energy storage safety valve group further includes a pressure gauge, and the pressure gauge is connected to the overflow valve for detecting the pressure value of the overflow valve.

[0009] In some embodiments, the hydraulic system further includes a second pressure reducing valve, a second check valve, and a second single-solenoid two-position four-way solenoid valve; wherein, the second pressure reducing valve is respectively connected to the oil inlet pipeline and the second single-solenoid two-position four-way solenoid valve, the second check valve is arranged between the second single-solenoid two-position four-way solenoid valve and the oil return pipeline, and realizes the one-way conduction of the second single-solenoid two-position four-way solenoid valve to the oil return pipeline, and the second single-solenoid two-position four-way solenoid valve is connected to a second device to be driven.

[0010] In some embodiments, the hydraulic system further includes a third pressure reducing valve, a third check valve, and a third single-solenoid two-position four-way solenoid valve; wherein, the third pressure reducing valve is respectively connected to the oil inlet pipeline and the third single-solenoid two-position four-way solenoid valve, the third check valve is arranged between the third single-solenoid two-position four-way solenoid valve and the oil return pipeline, and realizes the one-way conduction of the third single-solenoid two-position four-way solenoid valve to the oil return pipeline, and the third single-solenoid two-position four-way solenoid valve is connected to a third device to be driven.

[0011] In some embodiments, the hydraulic system further includes a main check valve, and the main check valve is arranged at an upstream position of the first pressure reducing valve, the second pressure reducing valve, and the third pressure reducing valve connected to the oil inlet pipeline.

[0012] In a second aspect, an embodiment of the present application provides a paper rewinder, and the paper rewinder includes a paper roll and the hydraulic system in the above embodiment, and the hydraulic system is used to realize the drive control of the paper roll.

[0013] The hydraulic system provided by the embodiment of the present application can avoid the interference of the oil return pressure generated when other systems operate during oil return by setting a check valve, and solves the problem that the braking is uncontrollable due to the oil return closing brake of other systems. Description of the Drawings

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0015] Figure 1 It is a schematic structural diagram of the hydraulic system of an embodiment of the paper rewinder of the present application;

[0016] Figure 2 It is a schematic structural diagram of the hydraulic system of another embodiment of the paper rewinder of the present application. Detailed Embodiments

[0017] The present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be specifically noted that the following embodiments are only used to illustrate the present application, but do not limit the scope of the present application. Similarly, the following embodiments are only partial embodiments of the present application rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present application.

[0018] The terms "first", "second", and "third" in the embodiments of the present application are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", and "third" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined. All directional indications (such as up, down, left, right, front, back...) in the embodiments of the present application are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly. The terms "include" and "have" and any variations thereof in the embodiments of the present application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or components inherent to these processes, methods, products, or devices.

[0019] Referring to "embodiment" herein means that a specific feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The phrase appears in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0020] Please refer to Figure 1 , Figure 1 which is a schematic structural diagram of the hydraulic system of an embodiment of the paper rewinder of the present application. The paper rewinder includes, but is not limited to, a device to be driven 10 and a hydraulic system 20. Among them, the device to be driven 10 in the embodiments of the present application can be a brake drive oil cylinder for a paper roll. Only the features related to the hydraulic system of the paper rewinder are shown in the figure, and other features of the paper rewinder are within the understanding of those skilled in the art and will not be elaborated herein.

[0021] Specifically, the hydraulic system 20 in this embodiment includes a first pressure reducing valve 110, a first one-way valve 120, and a first single-electromagnetic-controlled two-position four-way solenoid valve 130. Among them, the first pressure reducing valve 110 is respectively connected to the oil inlet pipeline P1, the oil drain pipeline R, and the first single-electromagnetic-controlled two-position four-way solenoid valve 130. The first one-way valve 120 is arranged between the first single-electromagnetic-controlled two-position four-way solenoid valve 130 and the oil return pipeline T, and realizes the one-way conduction of the first single-electromagnetic-controlled two-position four-way solenoid valve 130 to the oil return pipeline T. The first single-electromagnetic-controlled two-position four-way solenoid valve 130 is connected to the first device to be driven 11, where the first device to be driven 11 can be the brake oil cylinder of the paper roll.

[0022] Optionally, the hydraulic system 20 in this embodiment further includes a first manual valve 140, and the first manual valve 140 is arranged between the first single-electromagnetic-controlled two-position four-way solenoid valve 130 and the first device to be driven 11.

[0023] The hydraulic system provided by the embodiment of the present application, by setting a one-way valve, can avoid the interference of the oil return pressure generated when other systems operate during oil return, and solves the problem that the brake is uncontrollable due to the closing of the oil return of other systems.

[0024] Optionally, please continue to refer to Figure 1 In this embodiment, the hydraulic system 20 further includes an energy storage device 900, and the energy storage device 900 is respectively connected to the oil inlet pipeline P1 and the oil return pipeline T. Among them, the energy storage device 900 includes an accumulator 910 and an energy storage safety valve group 920, and the accumulator 910 is connected to the oil inlet pipeline P1 and the oil return pipeline T through the energy storage safety valve group 920. The energy storage safety valve group 920 includes a first stop valve 921, a second stop valve 922, a relief valve 923, and a pressure gauge 924. Two ends of the first stop valve 921 are respectively connected to the oil inlet pipeline P1 and the accumulator 910. Two ends of the second stop valve 922 are respectively connected to the oil return pipeline T and the accumulator 910. The relief valve 923 is connected in parallel with the second stop valve 922, and the pressure gauge 924 is connected to the relief valve 923 for detecting the pressure value of the relief valve 923.

[0025] In the hydraulic system of this embodiment, by designing an energy storage device, when the entire system suddenly loses power during rapid operation and the oil pump also stops accordingly, the hydraulic oil in the accumulator will be supplied to the brake mechanism for use, so that the equipment can quickly brake and stop, solving the waste problem caused by the inability to brake and the continuous guiding of the paper.

[0026] Please refer to Figure 2 , Figure 2It is a schematic structural diagram of the hydraulic system of another embodiment of the paper rewinder of the present application. The paper rewinder also includes, but is not limited to, a device to be driven 10 and a hydraulic system 20. Among them, the device to be driven 10 in the embodiment of the present application can be a brake driving oil cylinder of a paper roll. Only the features related to the hydraulic system of the paper rewinder are shown in the figure, and other features of the paper rewinder are within the understanding of those skilled in the art and will not be elaborated here.

[0027] Specifically, the hydraulic system 20 in this embodiment includes a first pressure reducing valve 110, a first one-way valve 120, and a first single-electrically controlled two-position four-way solenoid valve 130. Among them, the first pressure reducing valve 110 is respectively connected to the oil inlet pipeline P1, the oil drain pipeline R, and the first single-electrically controlled two-position four-way solenoid valve 130. The first one-way valve 120 is arranged between the first single-electrically controlled two-position four-way solenoid valve 130 and the oil return pipeline T, and realizes the one-way conduction of the first single-electrically controlled two-position four-way solenoid valve 130 to the oil return pipeline T. The first single-electrically controlled two-position four-way solenoid valve 130 is connected to the first device to be driven 11. Among them, the first device to be driven 11 may include a unwind brake operation side 11a and a unwind brake transmission side 11b.

[0028] Optionally, the hydraulic system 20 in this embodiment further includes two first manual valves 140, and the two first manual valves 140 are respectively arranged between the first single-electrically controlled two-position four-way solenoid valve 130 and the unwind brake operation side 11a and the unwind brake transmission side 11b. The hydraulic system 20 in this embodiment further includes a first one-way detection valve 150, and the first one-way detection valve 150 is used for troubleshooting detection of the pipeline between the first pressure reducing valve 110 and the first single-electrically controlled two-position four-way solenoid valve 130.

[0029] Optionally, please continue to refer to Figure 2 , the hydraulic system 20 in this embodiment further includes an energy storage device 900, and the energy storage device 900 is respectively connected to the oil inlet pipeline P1 and the oil return pipeline T. Among them, the energy storage device 900 includes an accumulator 910 and an energy storage safety valve group 920, and the accumulator 910 is connected to the oil inlet pipeline P1 and the oil return pipeline T through the energy storage safety valve group 920. The energy storage safety valve group 920 includes a first stop valve 921, a second stop valve 922, a relief valve 923, and a pressure gauge 924. Two ends of the first stop valve 921 are respectively connected to the oil inlet pipeline P1 and the accumulator 910. Two ends of the second stop valve 922 are respectively connected to the oil return pipeline T and the accumulator 910. The relief valve 923 is connected in parallel with the second stop valve 922, and the pressure gauge 924 is connected to the relief valve 923 for detecting the pressure value of the relief valve 923.

[0030] The hydraulic system 20 in this embodiment further includes a second pressure reducing valve 210, a second one-way valve 220, and a second single-electrically controlled two-position four-way solenoid valve 230. Among them, the second pressure reducing valve 210 is respectively connected to the oil inlet pipeline P1, the oil drain pipeline R, and the second single-electrically controlled two-position four-way solenoid valve 230. The second one-way valve 220 is arranged between the second single-electrically controlled two-position four-way solenoid valve 230 and the oil return pipeline T, and realizes the one-way conduction of the second single-electrically controlled two-position four-way solenoid valve 230 to the oil return pipeline T. The second single-electrically controlled two-position four-way solenoid valve 230 is connected to the second device to be driven 12. Among them, the second device to be driven 12 can be the front bottom roll brake.

[0031] Optionally, the hydraulic system 20 in this embodiment further includes a second manual valve 240 and a second one-way detection valve 250. Among them, the second manual valve 240 is arranged between the second single-electrically controlled two-position four-way solenoid valve 230 and the second device to be driven 12. The second one-way detection valve 250 is used for troubleshooting detection of the pipeline between the second pressure reducing valve 210 and the second single-electrically controlled two-position four-way solenoid valve 230.

[0032] The hydraulic system 20 in this embodiment further includes a third pressure reducing valve 310, a third one-way valve 320, and a third single-electrically controlled two-position four-way solenoid valve 330. Among them, the third pressure reducing valve 310 is respectively connected to the oil inlet pipeline P1, the oil drain pipeline R, and the third single-electrically controlled two-position four-way solenoid valve 330. The third one-way valve 320 is arranged between the third single-electrically controlled two-position four-way solenoid valve 330 and the oil return pipeline T, and realizes the one-way conduction of the third single-electrically controlled two-position four-way solenoid valve 330 to the oil return pipeline T. The third single-electrically controlled two-position four-way solenoid valve 330 is connected to the third device to be driven 13. Among them, the third device to be driven 13 can be the rear bottom roll brake.

[0033] Optionally, the hydraulic system 20 in this embodiment further includes a third manual valve 340 and a third one-way detection valve 350. Among them, the third manual valve 340 is arranged between the third single-electrically controlled two-position four-way solenoid valve 330 and the third device to be driven 13. The third one-way detection valve 350 is used for troubleshooting detection of the pipeline between the third pressure reducing valve 310 and the third single-electrically controlled two-position four-way solenoid valve 330.

[0034] Optionally, please continue to refer to Figure 2 , the hydraulic system 20 in this embodiment further includes a total one-way valve 800 and an oil inlet manual valve 700. The total one-way valve 800 and the oil inlet manual valve 700 are arranged at the upstream position of the first pressure reducing valve 110, the second pressure reducing valve 210, and the third pressure reducing valve 310 connected to the oil inlet pipeline P1. In addition, a one-way oil return valve 600 can also be arranged on the oil return pipeline T in this embodiment, which is used to ensure that the hydraulic oil on the oil return pipeline T has the one-way conduction function of oil return.

[0035] The several control processes of the hydraulic system in the embodiment of the present application are as follows.

[0036] 1) Unwinding brake closing control: (In this embodiment, the unwinding is controlled by two motors, one on the operator side and one on the drive side) Hydraulic oil flows into the first pressure reducing valve 110, and after pressure reduction (pressure is 100 Bar), it flows from the outlet of the pressure reducing valve into the P port of the first single-electrically controlled two-position four-way solenoid valve 130 (when in the closed state, this solenoid valve is not energized). It flows out from the A port through the right chamber of the first single-electrically controlled two-position four-way solenoid valve 130, flows into the first hand valve 140, and then into the brake device (unwinding brake operator side 11a and unwinding brake drive side 11b). At this time, the unwinding device is in the braking state.

[0037] 2) Front bottom roller brake closing control: Hydraulic oil flows into the second pressure reducing valve 210, and after pressure reduction (pressure is 100 Bar), it flows from the outlet of the pressure reducing valve into the P port of the second single-electrically controlled two-position four-way solenoid valve 230 (when in the closed state, this solenoid valve is not energized). It flows out from the A port through the right chamber of the second single-electrically controlled two-position four-way solenoid valve 230, flows into the second hand valve 240, and then into the brake device. At this time, the front bottom roller is in the braking state.

[0038] 3) Rear bottom roller brake closing control: Hydraulic oil flows into the third pressure reducing valve 330, and after pressure reduction (pressure is 100 Bar), it flows from the outlet of the pressure reducing valve into the P port of the third single-electrically controlled two-position four-way solenoid valve 330 (when in the closed state, this solenoid valve is not energized). It flows out from the A port through the right chamber of the third single-electrically controlled two-position four-way solenoid valve 330, flows into the third hand valve 340, and then into the brake device. At this time, the rear bottom roller is in the braking state.

[0039] 4) Unwinding brake opening control: (The unwinding is controlled by two motors, one on the operator side and one on the drive side) Hydraulic oil flows from the brake device into the first hand valve 140, flows out from the first hand valve 140 to the A port of the first single-electrically controlled two-position four-way solenoid valve 130 (when in the open state, the left coil of this solenoid valve is energized), flows out from the T port through the left chamber of the first single-electrically controlled two-position four-way solenoid valve 130, flows into the first check valve 120, and flows out to T (return oil tank) through the first check valve 120. At this time, the unwinding device is in the open state.

[0040] 5) Front bottom roller brake opening control: Hydraulic oil flows from the brake device into the second hand valve 240, flows out from the second hand valve 240 to the A port of the second single-electrically controlled two-position four-way solenoid valve 230 (when in the open state, the left coil of this solenoid valve is energized), flows out from the T port through the left chamber of the second single-electrically controlled two-position four-way solenoid valve 230, flows into the second check valve 220, and flows out to T (return oil tank) through the second check valve 220. At this time, the front bottom roller device is in the open state.

[0041] 6) Rear bottom roller brake opening control: The hydraulic oil flows from the brake device into the third manual valve 340, and then flows out of the third manual valve 340 to port A of the third single electrically controlled two-position four-way solenoid valve 330 (when in the open state, the left coil of this solenoid valve is energized). It flows out from port T through the left chamber of the third single electrically controlled two-position four-way solenoid valve 330, flows into the third check valve 320, and then flows out of the third check valve 320 to T (return oil tank). At this time, the rear bottom roller device is in the open state.

[0042] 7) Whole machine power-off brake protection: When the whole rewinder suddenly loses power, the hydraulic oil pump also stops. At this time, the hydraulic oil stored in the accumulator 910 will be supplied to the brake mechanism, causing the rear bottom roller to stop quickly and avoiding continuous unwinding, resulting in waste of paper.

[0043] 8) Prevention of brake misoperation protection: Due to the one-way design of the first check valve 120, the second check valve 220, and the third check valve 320, when other mechanical mechanisms operate, an oil return pressure is established. Due to the structure of this one-way valve itself, the oil pressure will not pass through the one-way valve to the brake, eliminating the problem of misoperation.

[0044] In the hydraulic system of this embodiment, by setting check valves, it is possible to avoid the interference of the oil return pressure generated when other systems operate during oil return, and solve the problem that the brake is uncontrollable due to the oil return closure of other systems. In addition, by designing an energy storage device, when the entire system suddenly loses power during rapid operation and the oil pump also stops accordingly, the hydraulic oil in the accumulator will be supplied to the brake mechanism for use, causing the equipment to brake quickly and stop, and solving the waste problem caused by the inability to brake and the continuous unwinding of the paper.

[0045] The above are only some embodiments of the present application, and thus do not limit the protection scope of the present application. Any equivalent device or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be similarly included in the patent protection scope of the present application.

Claims

1. A hydraulic system, characterized in that: The hydraulic system includes: a first pressure reducing valve, a first check valve and a first single-electrically controlled two-position four-way solenoid valve; wherein the first pressure reducing valve is connected to the oil inlet pipeline and the first single-electrically controlled two-position four-way solenoid valve respectively, the first check valve is arranged between the first single-electrically controlled two-position four-way solenoid valve and the oil return pipeline, and realizes the one-way conduction of the first single-electrically controlled two-position four-way solenoid valve to the oil return pipeline, and the first single-electrically controlled two-position four-way solenoid valve is connected to the first device to be driven.

2. The hydraulic system according to claim 1, characterized in that: A first manual valve is also provided between the first single-electrically controlled two-position four-way solenoid valve and the first device to be driven.

3. The hydraulic system according to claim 1, characterized in that: The hydraulic system further comprises an energy storage device, and the energy storage device is respectively connected to the oil inlet pipeline and the oil return pipeline.

4. The hydraulic system according to claim 3, characterized in that: The energy storage device comprises an energy accumulator and an energy storage safety valve group, and the energy accumulator is connected to the oil inlet pipeline and the oil return pipeline through the energy storage safety valve group.

5. The hydraulic system according to claim 4, characterized in that: The energy storage safety valve group includes a first stop valve, a second stop valve and a relief valve, the two ends of the first stop valve are respectively connected to the oil inlet pipeline and the energy accumulator, the two ends of the second stop valve are respectively connected to the oil return pipeline and the energy accumulator, and the relief valve is connected in parallel with the second stop valve.

6. The hydraulic system according to claim 5, characterized in that: The energy storage safety valve group also includes a pressure gauge, which is connected to the relief valve and is used to detect the pressure value of the relief valve.

7. The hydraulic system according to claim 1, characterized in that: The hydraulic system also includes a second pressure reducing valve, a second one-way valve and a second single-electrically controlled two-position four-way solenoid valve; wherein the second pressure reducing valve is connected to the oil inlet pipeline and the second single-electrically controlled two-position four-way solenoid valve respectively, the second one-way valve is arranged between the second single-electrically controlled two-position four-way solenoid valve and the oil return pipeline, and realizes one-way conduction of the second single-electrically controlled two-position four-way solenoid valve to the oil return pipeline, and the second single-electrically controlled two-position four-way solenoid valve is connected to the second device to be driven.

8. The hydraulic system according to claim 7, characterized in that: The hydraulic system also includes a third pressure reducing valve, a third one-way valve and a third single-electrically controlled two-position four-way solenoid valve; wherein the third pressure reducing valve is connected to the oil inlet pipeline and the third single-electrically controlled two-position four-way solenoid valve respectively, the third one-way valve is arranged between the third single-electrically controlled two-position four-way solenoid valve and the oil return pipeline, and realizes one-way conduction of the third single-electrically controlled two-position four-way solenoid valve to the oil return pipeline, and the third single-electrically controlled two-position four-way solenoid valve is connected to the third device to be driven.

9. The hydraulic system according to claim 8, characterized in that: The hydraulic system further comprises a total check valve, which is arranged at an upstream position of the first pressure reducing valve, the second pressure reducing valve and the third pressure reducing valve connected to the oil inlet pipeline.

10. A papermaking rewinding machine, characterized in that: The papermaking rewinding machine comprises a paper roller and a hydraulic system according to any one of claims 1 to 9, wherein the hydraulic system is used to realize drive control of the paper roller.

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