Hydraulic system and papermaking rewinder thereof
By designing a hydraulic system with components such as pressure reducing valves, solenoid valves and hydraulic controlled check valves, fast and slow down control is achieved, and the problem of low efficiency of hydraulic control systems in conventional papermaking equipment is solved and production capacity is improved.
Patent Information
- Application Number
- CN202421330805.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-11
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-06-11
AI Technical Summary
The hydraulic control system of conventional papermaking equipment can only achieve a single slow down, resulting in low working efficiency and affecting production capacity.
A hydraulic system is designed, including pressure reducing valve, dual electronically controlled three-position four-way solenoid valve, single electronically controlled two-position four-way solenoid valve, hydraulically controlled one-way valve and other components to achieve fast and slow down control functions.
This hydraulic system can control fast and slow down, improve work efficiency, and solve the problem that only slow down affects production capacity in conventional technical solutions.
Smart Images
Figure CN222910385U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of hydraulic control of papermaking equipment, and specifically relates to a hydraulic system and a paper rewinder thereof. Background Art
[0002] In the conventional technical solution, the hydraulic control system of the paper pressing roller of the packaging paper and cultural paper rewinder has a single control action and cannot change the speed of the control action, resulting in low work efficiency. Utility Model Content
[0003] In the first aspect of the embodiment of this application, a hydraulic system is provided. The hydraulic system includes: a pressure reducing valve, a double-electric-control three-position four-way solenoid valve, a first one-way throttle valve, a single-electric-control two-position four-way solenoid valve, a first hydraulic control one-way valve, and a second hydraulic control one-way valve. The pressure reducing valve is arranged between the oil inlet pipeline and the double-electric-control three-position four-way solenoid valve. One side of the first one-way throttle valve is communicated with the double-electric-control three-position four-way solenoid valve, and the other side is respectively communicated with the first hydraulic control one-way valve and the second hydraulic control one-way valve. The first hydraulic control one-way valve and the second hydraulic control one-way valve are respectively connected to the operating side and the driving side of the device to be driven. One side of the single-electric-control two-position four-way solenoid valve is connected to the oil inlet pipeline, and the other side is respectively connected to the first hydraulic control one-way valve and the second hydraulic control one-way valve.
[0004] In some embodiments, the hydraulic system further includes a proportional pressure reducing valve, and the proportional pressure reducing valve is arranged between the pressure reducing valve and the double-electric-control three-position four-way solenoid valve.
[0005] In some embodiments, the hydraulic system further includes a second one-way throttle valve. One side of the second one-way throttle valve is connected to the end of the first one-way throttle valve for connecting to the first hydraulic control one-way valve and the second hydraulic control one-way valve, and the other side of the second one-way throttle valve is connected to the oil return pipeline.
[0006] In some embodiments, the hydraulic system further includes a single-electric-control two-position four-way stop solenoid valve, and the single-electric-control two-position four-way stop solenoid valve is connected between the second one-way throttle valve and the oil return pipeline.
[0007] In some embodiments, the hydraulic system further includes a pressure sensor, and the pressure sensor is connected between the first one-way throttle valve and the first hydraulic control one-way valve and the second hydraulic control one-way valve.
[0008] In some embodiments, the hydraulic system further includes a one-way valve, and the one-way valve is arranged on the oil return pipeline.
[0009] In some embodiments, the hydraulic system further includes a first explosion-proof valve, and the first explosion-proof valve is arranged between the first hydraulic control one-way valve and the operating side of the device to be driven.
[0010] In some embodiments, the hydraulic system further includes a second explosion-proof valve, which is disposed between the second hydraulic control check valve and the transmission side of the device to be driven.
[0011] In some embodiments, the hydraulic system further includes a first manual valve, which is disposed on the oil inlet pipeline.
[0012] In a second aspect, an embodiment of the present application provides a paper rewinder, which includes a paper pressing roller and the hydraulic system described in the above embodiments, and the hydraulic system is used to drive the paper pressing roller.
[0013] The hydraulic system provided by the embodiment of the present application has the control function of fast and slow descent, and solves the problem that only slow descent in the conventional technical solution affects production capacity. BRIEF 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, without creative efforts, other drawings can be obtained based on these drawings.
[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 DESCRIPTION OF THE EMBODIMENTS
[0017] The following will further describe the present application in detail in conjunction with the drawings and embodiments. It should be particularly 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 belong to the scope of protection of the present application.
[0018] The terms "first", "second", and "third" in the embodiments of the present application are only 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 and clearly 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 drawings). If the specific posture changes, then the directional indications will also change accordingly. The terms "including" and "having" 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] Reference herein to "an embodiment" means that a particular 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 and 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 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: an operator side 10, a drive side 20, and a hydraulic system 30. Among them, the operator side 10 and the drive side 20 in the embodiments of the present application can be the drive structures of the paper pressing rollers. Only the features related to the hydraulic system of the paper rewinder are shown in the drawings, 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 30 in this embodiment includes a pressure reducing valve 100, a double-electromagnetic-controlled three-position four-way solenoid valve 200, a first one-way throttle valve 300, a single-electromagnetic-controlled two-position four-way solenoid valve 400, a first hydraulic check valve 500, and a second hydraulic check valve 600. Among them, the pressure reducing valve 100 is arranged between the oil inlet pipeline 001 and the double-electromagnetic-controlled three-position four-way solenoid valve 200. One side of the first one-way throttle valve 300 is communicated with the double-electromagnetic-controlled three-position four-way solenoid valve 200, and the other side is respectively communicated with the first hydraulic check valve 500 and the second hydraulic check valve 600. The first hydraulic check valve 500 and the second hydraulic check valve 600 are respectively connected to the operating side 10 and the driving side 20 of the device to be driven (which can be a paper pressing roller). One side of the single-electromagnetic-controlled two-position four-way solenoid valve 400 is connected to the oil inlet pipeline 001 (i.e., the P1 pipeline in the figure) and the oil return pipeline 002 (i.e., the T pipeline in the figure), and the other side is respectively connected to the first hydraulic check valve 500 and the second hydraulic check valve 600. What is marked as 003 in the figure represents an oil drain pipeline (i.e., the R pipeline in the figure).
[0022] The hydraulic system provided in this embodiment has the control function of fast and slow descent, and solves the problem that only slow descent in the conventional technical solution affects production capacity.
[0023] Please refer to Figure 2 , Figure 2 which is a schematic structural diagram of the hydraulic system of another embodiment of the paper rewinder of the present application. The paper rewinder may also include, but is not limited to, an operating side 10, a driving side 20, and a hydraulic system 30.
[0024] The hydraulic system 30 in this embodiment includes a pressure reducing valve 100, a double-electromagnetic-controlled three-position four-way solenoid valve 200, a first one-way throttle valve 300, a single-electromagnetic-controlled two-position four-way solenoid valve 400, a first hydraulic check valve 500, a second hydraulic check valve 600, a proportional pressure reducing valve 700, a second one-way throttle valve 800, a single-electromagnetic-controlled two-position four-way stop solenoid valve 900, a first explosion-proof valve 910, and a second explosion-proof valve 920.
[0025] Among them, the pressure reducing valve 100 is arranged between the oil inlet pipeline 001 and the proportional pressure reducing valve 700. The proportional pressure reducing valve 700 is arranged between the pressure reducing valve 100 and the double-electromagnetic-controlled three-position four-way solenoid valve 200. One side of the first one-way throttle valve 300 is communicated with the double-electromagnetic-controlled three-position four-way solenoid valve 200, and the other side is respectively communicated with the first hydraulic control one-way valve 500 and the second hydraulic control one-way valve 600. A first explosion-proof valve 910 is arranged between the first hydraulic control one-way valve 500 and the operating side 10 of the device to be driven (which can be a paper pressing roller). A second explosion-proof valve 920 is arranged between the second hydraulic control one-way valve 600 and the driving side 20 of the device to be driven (which can be a paper pressing roller). One side of the single-electromagnetic-controlled two-position four-way solenoid valve 400 is connected to the oil inlet pipeline 001 (i.e., the P1 pipeline in the figure) and the oil return pipeline 002 (i.e., the T pipeline in the figure), and the other side is respectively connected to the first hydraulic control one-way valve 500 and the second hydraulic control one-way valve 600. The pipeline marked 003 in the figure represents the oil drain pipeline (i.e., the R pipeline in the figure).
[0026] Optionally, one side of the second one-way throttle valve 800 in this embodiment is connected to one end of the first one-way throttle valve 300 for connecting with the first hydraulic control one-way valve 500 and the second hydraulic control one-way valve 600. The other side of the second one-way throttle valve 800 is connected to the single-electromagnetic-controlled two-position four-way stop solenoid valve 900, and the other side of the single-electromagnetic-controlled two-position four-way stop solenoid valve 900 is connected to the oil return pipeline 002.
[0027] Optionally, please continue to refer to Figure 2 , the hydraulic system 30 in this embodiment further includes a pressure sensor 930, a one-way valve 940, a first manual valve 950, a second manual valve 960, a third manual valve 970, a first pointer-type pressure gauge 980, and a second pointer-type pressure gauge 990. Among them, the pressure sensor 930 is connected between the first one-way throttle valve 300 and the first hydraulic control one-way valve 500 and the second hydraulic control one-way valve 600. The pressure sensor 930 is used to detect the pressure in the hydraulic oil pipeline between the first one-way throttle valve 300 and the first hydraulic control one-way valve 500 and the second hydraulic control one-way valve 600, and transmit the detected pressure signal to the control main board (such as a PLC, not shown in the figure).
[0028] Among them, the one-way valve 940 is arranged on the oil return pipeline 002. The first manual valve 950 is arranged on the oil inlet pipeline 001. The second manual valve 960 is arranged between the first explosion-proof valve 910 and the first hydraulic control one-way valve 500. The second manual valve 970 is arranged between the second explosion-proof valve 920 and the second hydraulic control one-way valve 600. The first pointer-type pressure gauge 980 is connected to the pressure reducing valve 100 and is used to detect and display the hydraulic pressure of the pressure reducing valve 100. The second pointer-type pressure gauge 990 is connected to the proportional pressure reducing valve 700 and is used to detect and display the hydraulic pressure of the proportional pressure reducing valve 700.
[0029] The several control processes of the hydraulic system in the embodiment of the present application are as follows.
[0030] 1) Lifting control process: The hydraulic oil flows out after being decompressed by the pressure reducing valve 100 and flows into the inlet of the proportional pressure reducing valve 700 (the AO module outputs a current signal to the amplifier board of the proportional pressure reducing valve to make its opening degree 80%). The hydraulic oil flows into the right chamber P port of the double-electromagnetic-controlled three-position four-way solenoid valve 200 (the right coil of the double-electromagnetic-controlled three-position four-way solenoid valve 200 is energized during rising) after being decompressed by the proportional pressure reducing valve 700. The hydraulic oil flows into the first one-way throttle valve 300 through the A port of the double-electromagnetic-controlled three-position four-way solenoid valve 200, and flows out to the inlet of the hydraulic control check valve (including the first hydraulic control check valve 500 and the second hydraulic control check valve 600) after throttling through the first one-way throttle valve 300 (the single-electromagnetic-controlled two-position four-way solenoid valve 400 reversing valve is energized during rising, and the hydraulic oil flows in through the left chamber P port of the single-electromagnetic-controlled two-position four-way solenoid valve 400 and flows out from the B port to the first hydraulic control check valve 500 and the second hydraulic control check valve 600. At this moment, the first hydraulic control check valve 500 and the second hydraulic control check valve 600 are open). The hydraulic oil flows into the first explosion-proof valve 910 and the second explosion-proof valve 920 through the hydraulic control outlet (the explosion-proof valve can prevent the guide roller from dropping directly after the hose bursts and ensure safety), and flows into the rod chamber of the hydraulic cylinder through the explosion-proof valve. At this time, the hydraulic cylinder drives the paper pressing roller to rise.
[0031] 2) Slow descent control process: During slow descent, the oil in the rod chamber of the hydraulic cylinder flows into the hydraulic control check valve through the first explosion-proof valve 910 and the second explosion-proof valve 920 (the single-electromagnetic-controlled two-position four-way solenoid valve 400 reversing valve is energized during slow descent, and the hydraulic oil reaches the first hydraulic control check valve 500 and the second hydraulic control check valve 600 through the left chamber of the single-electromagnetic-controlled two-position four-way solenoid valve 400. At this moment, the check valve is open). The hydraulic oil flows into the second one-way throttle valve 800 through the hydraulic control check valve, and flows into the A port of the left chamber of the single-electromagnetic-controlled two-position four-way stop solenoid valve 900 (the single-electromagnetic-controlled two-position four-way stop solenoid valve 900 is energized during slow descent) after throttling through the second one-way throttle valve 800, and returns to the fuel tank through the T port.
[0032] 3) Fast descent control process: During fast descent, the oil in the rod chamber of the hydraulic cylinder flows into the hydraulic control check valve through the first explosion-proof valve 910 and the second explosion-proof valve 920 (the single-electromagnetic-controlled two-position four-way solenoid valve 400 is energized during fast descent, and the hydraulic oil reaches the first hydraulic control check valve 500 and the second hydraulic control check valve 600 through the left chamber of the single-electromagnetic-controlled two-position four-way solenoid valve 400. At this moment, the check valve is open). The hydraulic oil flows into the first one-way throttle valve 300 through the hydraulic control check valve, and flows into the A port of the left chamber of the double-electromagnetic-controlled three-position four-way solenoid valve 200 (the left coil of the double-electromagnetic-controlled three-position four-way solenoid valve 200 is energized during fast descent) after throttling through the first one-way throttle valve 300, and returns to the fuel tank through the T port.
[0033] 4) Paper pressing operation control process: The hydraulic oil flows out after being decompressed by the pressure reducing valve 100 and flows into the inlet of the proportional pressure reducing valve 700 (the AO module outputs a 4-20 mA current signal to the amplifier board of the proportional pressure reducing valve, and 4-20 mA corresponds to the proportional valve opening of 0-100%). The hydraulic oil flows into the right chamber P port of the double-electric-controlled three-position four-way solenoid valve 200 (the right coil of the double-electric-controlled three-position four-way solenoid valve 200 is energized during upward movement) after being decompressed by the proportional pressure reducing valve 700 (the pressure decreases from large to small according to the diameter, and this corresponding relationship needs to be obtained through on-site tests). The hydraulic oil flows into the first one-way throttle valve 300 through port A of the double-electric-controlled three-position four-way solenoid valve 200, and flows out to the inlet of the hydraulic control check valve after throttling through the first one-way throttle valve 300 (the single-electric-controlled two-position four-way solenoid valve 400 is energized during upward movement, and the hydraulic oil flows in through port P of the left chamber of the single-electric-controlled two-position four-way solenoid valve 400 and flows out through port B to the first hydraulic control check valve 500 and the second hydraulic control check valve 600. At this moment, the check valve is open). The hydraulic oil flows into the first explosion-proof valve 910 and the second explosion-proof valve 920 through the hydraulic control outlet (the explosion-proof valve can prevent the guide roller from directly falling after the hose bursts, ensuring safety). The hydraulic oil flows into the rod chamber of the hydraulic cylinder through the explosion-proof valve. At this time, the hydraulic cylinder generates an upward force to drive the paper pressing roller, and the pressure is controlled by the proportional valve to adjust and offset the weight of the paper pressing roller, so as to obtain the desired line pressure.
[0034] The liquid in the embodiment of the present application effectively solves the problem of the demand for fast and slow speeds. The fast speed can better improve production efficiency, and the slow speed can better improve control accuracy; the design of two hydraulic control check valves can achieve the stop of the paper pressing roller at any position, ensuring that the paper pressing roller can stop immediately when the equipment is emergently stopped, maximizing safety, and at the same time facilitating operation, subsequent maintenance, and testing after maintenance; the design of the explosion-proof valve well prevents the risk of hose bursting and paper pressing roller dropping, ensuring the safety of personnel and equipment.
[0035] 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 equally included in the patent protection scope of the present application.
Claims
1. A hydraulic system, characterized in that: The hydraulic system includes: a pressure reducing valve, a double-electrically controlled three-position four-way solenoid valve, a first one-way throttle valve, a single-electrically controlled two-position four-way solenoid valve, a first hydraulically controlled one-way valve and a second hydraulically controlled one-way valve. The pressure reducing valve is arranged between the oil inlet pipeline and the double-electrically controlled three-position four-way solenoid valve. One side of the first one-way throttle valve is connected to the double-electrically controlled three-position four-way solenoid valve, and the other side is connected to the first hydraulically controlled one-way valve and the second hydraulically controlled one-way valve respectively. The first hydraulically controlled one-way valve and the second hydraulically controlled one-way valve are respectively connected to the operating side and the transmission side of the device to be driven. One side of the single-electrically controlled two-position four-way solenoid valve is connected to the oil inlet pipeline, and the other side is respectively connected to the first hydraulically controlled one-way valve and the second hydraulically controlled one-way valve.
2. The hydraulic system according to claim 1, characterized in that: The hydraulic system further comprises a proportional pressure reducing valve, which is arranged between the pressure reducing valve and the dual-electrically controlled three-position four-way solenoid valve.
3. The hydraulic system according to claim 2, characterized in that: The hydraulic system also includes a second one-way throttle valve, one side of which is connected to one end of the first one-way throttle valve for connecting to the first hydraulically controlled one-way valve and the second hydraulically controlled one-way valve, and the other side of the second one-way throttle valve is connected to the return oil pipeline.
4. The hydraulic system according to claim 3, characterized in that: The hydraulic system further comprises a single-electrically controlled two-position four-way cut-off solenoid valve, which is connected between the second one-way throttle valve and the oil return pipeline.
5. The hydraulic system according to claim 1, characterized in that: The hydraulic system further includes a pressure sensor, and the pressure sensor is connected between the first one-way throttle valve and the first hydraulically controlled one-way valve and the second hydraulically controlled one-way valve.
6. The hydraulic system according to claim 5, characterized in that: The hydraulic system further comprises a one-way valve, which is arranged on the oil return pipeline.
7. The hydraulic system according to claim 1, characterized in that: The hydraulic system further comprises a first explosion-proof valve, which is arranged between the first hydraulically controlled one-way valve and the operating side of the device to be driven.
8. The hydraulic system according to claim 7, characterized in that: The hydraulic system further comprises a second explosion-proof valve, which is arranged between the second hydraulically controlled one-way valve and the transmission side of the device to be driven.
9. The hydraulic system according to claim 1, characterized in that: The hydraulic system further comprises a first manual valve, which is arranged on the oil inlet pipeline.
10. A papermaking rewinding machine, characterized in that: The papermaking rewinder comprises a paper pressing roller and a hydraulic system according to any one of claims 1 to 9, wherein the hydraulic system is used to drive the paper pressing roller.