Hydraulic system for roller press and roller press

Abstract

The utility model provides a hydraulic system for a roller press and the roller press, the hydraulic system comprises a power element and a plurality of hydraulic cylinders, the power element is connected to the plurality of hydraulic cylinders through pipelines, and the power element is used for outputting hydraulic oil; and the control element is arranged on the pipeline and used for controlling working parameters of hydraulic oil in each hydraulic cylinder, the hydraulic cylinders are used for driving the corresponding rollers to move, and each hydraulic cylinder is independently controlled through the control element, so that the difficulty in controlling the rollers in the hydraulic system can be reduced, and the working stability of the roller press is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydraulic boosting, and specifically relates to a hydraulic system for a roller press and the roller press. Background Art

[0002] The roller press can extrude granular raw materials into shapes. For example, the electrode raw materials of batteries need to be extruded into membranes of a certain thickness through a roller press under certain temperature and pressure conditions.

[0003] However, as the requirements for film forming efficiency become higher and higher, in order to improve the working efficiency of the roller press, a multi-roller roller press has emerged. However, the control of multiple rollers in a multi-roller roller press is difficult, which reduces the working stability of the multi-roller roller press. Utility Model Content

[0004] One purpose of the utility model is to provide a hydraulic system for a roller press and a new technical solution for the roller press.

[0005] According to a first aspect of the utility model, there is provided a hydraulic system for a roller press, comprising:

[0006] A power element and a plurality of hydraulic cylinders, wherein the power element is connected to the plurality of hydraulic cylinders through pipelines, and the power element is used to output hydraulic oil;

[0007] A control element is arranged in the pipeline and is used to control the working parameters of the hydraulic oil in each hydraulic cylinder, and the hydraulic cylinder is used to drive the corresponding roller to move.

[0008] Optionally, the pipeline includes an input main pipeline and a plurality of input branches, one end of the plurality of input branches is connected to the input main pipeline, and the other ends of the plurality of input branches are correspondingly connected to the plurality of hydraulic cylinders;

[0009] A plurality of the input branches are arranged in parallel.

[0010] Optionally, the input branch includes a first input pipeline and a second input pipeline, and the control element includes a first group of control valves and a second group of control valves;

[0011] The power element is connected to the hydraulic cylinder via the first input pipeline and the second input pipeline;

[0012] The first group of control valves is disposed in the first input pipeline to control the extension of the hydraulic cylinder, and the second group of control valves is disposed in the second input pipeline to control the retraction of the hydraulic cylinder.

[0013] Optionally, the control element comprises a distribution valve, which is connected to an inlet end of the input branch and is used to distribute the amount of hydraulic oil in the first input pipeline and the second input pipeline.

[0014] Optionally, the hydraulic system has a working mode and a debugging mode;

[0015] When the hydraulic system is in working mode, the power element can deliver hydraulic oil with a first pressure to the hydraulic cylinder through a pipeline. When the hydraulic system is in debugging mode, the power element can deliver hydraulic oil with a second pressure to the hydraulic cylinder through a pipeline, and the second pressure is lower than the first pressure.

[0016] Optionally, an auxiliary element is further included, and the auxiliary element includes an oil storage tank, and the oil storage tank is connected to the power element and is used to provide hydraulic oil.

[0017] Optionally, the auxiliary element comprises a first filter, an accumulator and a safety module, and the first filter, the accumulator and the safety module are connected in the pipeline.

[0018] Optionally, the auxiliary element comprises a reflux path, a heat exchanger and a second filter, one end of the reflux path is connected to a drain port of the hydraulic cylinder, and the other end of the reflux path is connected to the oil storage tank;

[0019] The heat exchanger and the second filter are disposed in the return path.

[0020] Optionally, the power element includes a motor and a hydraulic pump, the motor is connected to the hydraulic pump and is used to drive the hydraulic pump to operate, and the outlet end of the hydraulic pump is connected to the plurality of hydraulic cylinders through a pipeline;

[0021] The outlet end of the hydraulic pump is provided with a regulating valve, which is used to release the hydraulic oil reaching the set pressure to the hydraulic cylinder and can return the hydraulic oil to the oil storage tank through the overflow valve.

[0022] According to a second aspect of the utility model, a roller press is provided, comprising a plurality of rollers and the hydraulic system according to the first aspect;

[0023] The plurality of hydraulic cylinders are correspondingly connected to the plurality of rollers and can drive the rollers to move, and the adjacent rollers are used for rolling the battery membrane.

[0024] A technical effect of the utility model is:

[0025] An embodiment of the present application provides a hydraulic system for a roller press, which includes a power element and multiple hydraulic cylinders. The power element is connected to the multiple hydraulic cylinders through pipelines, and the power element is used to output hydraulic oil; a control element is arranged in the pipeline and is used to control the working parameters of the hydraulic oil in each hydraulic cylinder. The hydraulic cylinder is used to drive the corresponding roller to move. Each hydraulic cylinder is independently controlled by the control element, which can reduce the difficulty of controlling the roller in the hydraulic system and ensure the stability of the roller press.

[0026] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0028] Figure 1 A schematic diagram of a hydraulic system for a roller press provided by one embodiment of the utility model;

[0029] Figure 2 A schematic diagram of a power element of a hydraulic system for a roller press provided in one embodiment of the utility model;

[0030] Figure 3 A schematic diagram of a hydraulic cylinder of a hydraulic system for a roller press provided by one embodiment of the utility model;

[0031] Figure 4 A schematic diagram of control elements of a hydraulic system for a roller press provided by one embodiment of the utility model;

[0032] Figure 5 A schematic diagram of an auxiliary component of a hydraulic system for a roller press provided by an embodiment of the utility model;

[0033] Figure 6 A schematic diagram of a roller of a roller press provided in one embodiment of the utility model.

[0034] in:

[0035] 1. Power element; 11. Motor; 12. Hydraulic pump; 13. Control valve; 2. Hydraulic cylinder; 3. Control element; 31. First group of control valves; 311. First stop valve; 312. First overflow valve; 32. Second group of control valves; 321. Second stop valve; 322. Second overflow valve; 33. Distribution valve; 4. Auxiliary element; 41. Oil storage tank; 42. First filter; 43. Accumulator; 44. Safety module; 45. Return path; 46. Heat exchanger; 47. Second filter;

[0036] 10, pipeline; 101, main input pipeline; 102, branch input pipeline; 1021, first input pipeline; 1022, second input pipeline;

[0037] 100. Roller. DETAILED DESCRIPTION

[0038] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0039] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be understood as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0040] The term "first" or "second" in the specification and claims of this application may include one or more of the features explicitly or implicitly. In the description of this application, unless otherwise specified, "plurality" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0041] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0042] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0043] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0044] Reference Figures 1 to 3 , the embodiment of the present application provides a hydraulic system for a multi-roller press, the hydraulic system comprising:

[0045] A power element 1 and a plurality of hydraulic cylinders 2, wherein the power element 1 is connected to the plurality of hydraulic cylinders 2 via a pipeline 10, and the power element 1 is used to output hydraulic oil;

[0046] The control element 3 is arranged in the pipeline 10 and is used to control the working parameters of the hydraulic oil in each hydraulic cylinder 2. The hydraulic cylinder 2 is used to drive the corresponding roller 100 to move.

[0047] In this embodiment, the power element 1 is capable of outputting hydraulic oil with a set pressure and a set flow rate to the pipeline 10, and the control element 3 is arranged on the pipeline 10 and is used to control the working parameters of the hydraulic oil in each hydraulic cylinder 2. The working parameters of the hydraulic oil may include the pressure parameters, flow rate parameters and flow direction parameters of the hydraulic oil. The control element 3 can control the pressure, flow rate and flow direction of the hydraulic oil through a control valve arranged on the pipeline 10, thereby delivering the hydraulic oil reaching the set pressure, flow rate and flow direction to the hydraulic cylinder 2.

[0048] Multiple hydraulic cylinders 2 are connected to multiple rollers 100 one by one. The hydraulic cylinders 2 output a controllable driving force (which can be a torque) by inputting hydraulic oil with a certain pressure and flow. Specifically, the pressurized hydraulic oil is input into the cavity of different hydraulic cylinders 2 through the pipeline 10 under the control of the control element 3, so that the hydraulic cylinder 2 can output a controllable driving force, and then the multiple rollers 100 are driven to move independently by the multiple hydraulic cylinders 2.

[0049] Multiple hydraulic cylinders 2 can drive the corresponding rolling mill 100 to move, and each hydraulic cylinder 2 is independently controlled by a control element 3. Specifically, multiple control valves in the control element 3 are used to accurately control the oil pressure in each hydraulic cylinder 2, and then the working pressure of the rolling mill 100 is independently controlled by multiple hydraulic cylinders 2.

[0050] Adjacent rollers 100 are configured to roll battery diaphragms. Independent control of the rollers 100 can improve the pressure uniformity during the battery diaphragm forming process. The corresponding drive of the rollers 100 by multiple hydraulic cylinders 2 can reduce the difficulty of controlling the rollers 100 in the hydraulic system and ensure the stability of the roller press.

[0051] The hydraulic oil may be anti-wear hydraulic oil to ensure the stability of the hydraulic oil when transmitting pressure in the hydraulic system.

[0052] The hydraulic system provided in the embodiment of the present application includes a power element 1 and multiple hydraulic cylinders 2. The power element 1 is connected to the multiple hydraulic cylinders 2 through a pipeline 10, and the power element 1 is used to output hydraulic oil; a control element 3, the control element 3 is arranged in the pipeline 10 and is used to control the working parameters of the hydraulic oil in each hydraulic cylinder 2, the hydraulic cylinder 2 is used to drive the corresponding rolling roller 100 to move, and each hydraulic cylinder 2 is independently controlled by the control element 3, which can reduce the difficulty of controlling the rolling roller 100 in the hydraulic system and ensure the stability of the roller press operation.

[0053] In one embodiment, see Figure 3 and Figure 4 The pipeline 10 includes an input main pipeline 101 and a plurality of input branches 102, one end of the plurality of input branches 102 is connected to the input main pipeline 101, and the other end of the plurality of input branches 102 is correspondingly connected to the plurality of hydraulic cylinders 2;

[0054] A plurality of input branches 102 are arranged in parallel.

[0055] In this embodiment, multiple input branches 102 are connected between the input main line 101 and the multiple hydraulic cylinders 2 and are connected in parallel. The multiple input branches 102 can transport the hydraulic oil in the input main line 101 to the multiple hydraulic cylinders 2 respectively, ensuring the independence of the actions of the multiple hydraulic cylinders 2.

[0056] The multiple hydraulic cylinders 2 are not affected by each other, so that the multiple hydraulic cylinders 2 can drive the multiple rollers 100 to move and provide stable pressure to the rollers 100, so as to flexibly adjust the roller pressure P between any two adjacent rollers 100. Figure 6 shown.

[0057] In one embodiment, see Figure 4 , the input branch 102 includes a first input pipeline 1021 and a second input pipeline 1022 , and the control element 3 includes a first group of control valves 31 and a second group of control valves 32 ;

[0058] The power element 1 is connected to the hydraulic cylinder 2 via a first input pipeline 1021 and a second input pipeline 1022;

[0059] The first set of control valves 31 is disposed in the first input pipeline 1021 to control the extension of the hydraulic cylinder 2 , and the second set of control valves 32 is disposed in the second input pipeline 1022 to control the retraction of the hydraulic cylinder 2 .

[0060] In this embodiment, the first input pipeline 1021 and the second input pipeline 1022 can be connected in parallel, the first group of control valves 31 includes a first stop valve 311 and a first overflow valve 312, and the second group of control valves 32 includes a second stop valve 321 and a second overflow valve 322. The first stop valve 311 and the first overflow valve 312 are connected to the first input pipeline 1021, and the second stop valve 321 and the second overflow valve 322 are connected to the second input pipeline 1022 to control the pressure, flow speed and flow direction of the hydraulic oil in the first input pipeline 1021 and the second input pipeline 1022, thereby controlling the extension or retraction of the hydraulic cylinder 2, so as to flexibly adjust the moving direction of the rolling roller 100.

[0061] In one embodiment, see Figure 4 The control element 3 includes a distribution valve 33 , which is connected to the inlet end of the input branch 102 and is used to distribute the amount of hydraulic oil in the first input pipeline 1021 and the second input pipeline 1022 .

[0062] In this embodiment, the hydraulic oil in the input main pipeline 101 flows into the first input pipeline 1021 and the second input pipeline 1022 through the inlet end of the input branch 102. When the distribution valve 33 is connected to the inlet end of the input branch 102, the distribution valve 33 can proportionally distribute the hydraulic oil flowing into the first input pipeline 1021 and the second input pipeline 1022 through the inlet end of the input branch 102.

[0063] In one embodiment, when hydraulic oil is transported to the hydraulic cylinder 2 through the first input pipeline 1021 to achieve the extension of the hydraulic cylinder 2, the hydraulic oil passing through the inlet end of the input branch 102 can be distributed through the distribution valve 33 to flow into the first input pipeline 1021. At this time, no hydraulic oil flows in the second input pipeline 1022 to facilitate the extension of the hydraulic cylinder 2.

[0064] In another embodiment, when hydraulic oil is delivered to the hydraulic cylinder 2 through the second input pipeline 1022 to achieve the retraction of the hydraulic cylinder 2, the hydraulic oil passing through the inlet end of the input branch 102 can be distributed by the distribution valve 33 to flow into the second input pipeline 1022. At this time, no hydraulic oil flows in the first input pipeline 1021 to facilitate the retraction of the hydraulic cylinder 2.

[0065] In one embodiment, the hydraulic system has a working mode and a debugging mode;

[0066] When the hydraulic system is in working mode, the power element 1 can deliver hydraulic oil with a first pressure to the hydraulic cylinder 2 through the pipeline 10. When the hydraulic system is in debugging mode, the power element 1 can deliver hydraulic oil with a second pressure to the hydraulic cylinder 2 through the pipeline 10, and the second pressure is lower than the first pressure.

[0067] In this embodiment, the hydraulic system mode can select a working mode and a debugging mode. Correspondingly, the hydraulic oil in the pipeline 10 has two pressure states. When the hydraulic system is working normally, the hydraulic oil with a first pressure can be delivered to the hydraulic cylinder 2 through the power element 1. At this time, the pressure of the hydraulic oil is relatively high, which can ensure the driving stability of the hydraulic cylinder 2 on the rolling mill 100.

[0068] When the hydraulic system needs to be debugged, hydraulic oil with a second pressure can be delivered to the hydraulic cylinder 2 through the power element 1. The second pressure is lower than the first pressure, that is, the pressure of the hydraulic oil is lower at this time, which can ensure the flexibility and safety of the hydraulic system during debugging.

[0069] In one embodiment, the distribution valve 33 at the inlet end of the input branch 102 can distribute hydraulic oil of different pressures to the first input pipeline 1021 and the second input pipeline 1022; for example, when the hydraulic system is working normally, the distribution valve 33 can distribute high-pressure hydraulic oil to the first input pipeline 1021; and when the hydraulic system needs to be debugged, the distribution valve 33 can distribute low-pressure hydraulic oil to the second input pipeline 1022.

[0070] In one embodiment, a displacement sensor is provided on the hydraulic cylinder 2, which can provide accurate parameters of the displacement of the hydraulic cylinder 2, realize the switching of pressure control and displacement control of the hydraulic cylinder 2, improve the control accuracy of the hydraulic cylinder 2, and ensure the stability of the movement of the roller 100.

[0071] In one embodiment, see Figure 5 The hydraulic system further includes an auxiliary component 4, which includes an oil storage tank 41, which is connected to the power component 1 and is used to provide hydraulic oil.

[0072] In this embodiment, the power element 1 can draw hydraulic oil from the oil storage tank 41, and transport the hydraulic oil that reaches the set pressure to multiple hydraulic cylinders 2 through the pipeline 10; the hydraulic cylinder 2 can be a double-acting hydraulic cylinder, and the force areas at both ends of the piston in the hydraulic cylinder are different, thereby driving the hydraulic cylinder to extend and retract; the volume of the hydraulic oil inside the hydraulic cylinder 2 will change when the hydraulic cylinder 2 extends and retracts. During the process of the change in the volume of the hydraulic oil, the excess hydraulic oil can flow back to the oil storage tank 41 through the overflow valve and the return pipeline, while ensuring the output stability of the power element 1, the utilization rate of the hydraulic oil in the oil storage tank 41 is improved.

[0073] In one embodiment, see Figure 5 The auxiliary element 4 includes a first filter 42 , an accumulator 43 and a safety module 44 , and the first filter 42 , the accumulator 43 and the safety module 44 are connected in the pipeline 10 .

[0074] In this embodiment, the hydraulic oil output by the power element 1 is Figure 5The left P end of the auxiliary element 4 enters the auxiliary element 4, and after filtering, energy exchange and voltage stabilization through the first filter 42, the accumulator 43 and the safety module 44, Figure 5 The P end output on the right side of the middle is used to keep the pressure of the hydraulic oil in a stable and safe state.

[0075] Further, from Figure 5 The hydraulic oil output from the P end on the middle right side enters the input branch 102 provided with the control element 3 to ensure the stability of the hydraulic cylinder 2 driving the corresponding roller 100.

[0076] In one embodiment, see Figure 5 , the auxiliary element 4 includes a reflux path 45, a heat exchanger 46 and a second filter 47, one end of the reflux path 45 is connected to the discharge port of the hydraulic cylinder 2, and the other end of the reflux path 45 is connected to the oil storage tank 41;

[0077] A heat exchanger 46 and a second filter 47 are provided in the return path 45 .

[0078] In this embodiment, the hydraulic oil in the hydraulic cylinder 2 is discharged from the drain port after the hydraulic cylinder 2 completes its action. The discharged hydraulic oil can be cooled and filtered by the heat exchanger 46 and the second filter 47 on the return path 45 and then flow back to the oil storage tank 41, thereby ensuring the utilization efficiency of the hydraulic oil in the hydraulic system.

[0079] In one embodiment, the hydraulic system further includes a pressure sensor and an oil level and oil temperature gauge. The pressure sensor is arranged on the input main line 101 and the multiple input branches 102, and the oil level and oil temperature gauge is arranged on the oil storage tank 41 to monitor the pressure and oil level of the entire hydraulic system, and feed back the monitoring data to the control element 3 in real time to ensure the stable operation of the hydraulic system.

[0080] In one embodiment, see Figure 1 and Figure 2 The power element 1 includes a motor 11 and a hydraulic pump 12. The motor 11 is connected to the hydraulic pump 12 and is used to drive the hydraulic pump 12 to operate. The outlet end of the hydraulic pump 12 is connected to the plurality of hydraulic cylinders 2 through a pipeline 10.

[0081] A regulating valve 13 is provided at the outlet end of the hydraulic pump 12 . The regulating valve 13 is used to release the hydraulic oil reaching a set pressure to the hydraulic cylinder 2 , and can return the hydraulic oil to the oil storage tank 41 through a relief valve.

[0082] In this embodiment, the hydraulic oil output by the hydraulic pump 12 provides hydraulic oil of set flow rate and set pressure in the pipeline 10 under the control of the regulating valve 13, so as to meet the flow rate and pressure requirements of the hydraulic oil when the hydraulic cylinder 2 is working. The excess hydraulic oil can be returned to the oil storage tank 41 through the overflow valve and the return pipeline, thereby improving the utilization rate of the hydraulic oil in the oil storage tank 41 while ensuring the output stability of the power element 1.

[0083] The action process of the hydraulic system may include:

[0084] The hydraulic oil in the oil storage tank is pressurized by the motor and hydraulic pump in the power element 1, and a certain flow rate and pressure are obtained at the pump head of the hydraulic pump through the regulating valve. Subsequently, the initially output pressurized hydraulic oil passes through the filter, accumulator and safety module in the auxiliary element 4 to obtain a relatively stable pressure state. The hydraulic oil with stable pressure enters the pipeline with the control element. Two different sets of stop valves and overflow valves are set in the control element 3 to control the pressure in the input branch to realize the conversion of the hydraulic system working mode and debugging mode. Finally, the hydraulic oil output from the hydraulic cylinder is filtered again and cooled by the heat exchanger before returning to the oil storage tank to form a hydraulic control circuit of the hydraulic system.

[0085] See also Figure 1 and Figure 6 , the embodiment of the present application also provides a roller press, which includes a plurality of rollers 100 and the above-mentioned hydraulic system;

[0086] The plurality of hydraulic cylinders 2 are correspondingly connected to the plurality of rollers 100 and are used to drive the rollers 100 to move, and the adjacent rollers 100 are configured to roll the battery membrane.

[0087] In this embodiment, the roller press is a multi-roller roller press, and the hydraulic system of the roller press includes a power element 1 and a plurality of hydraulic cylinders 2. The power element 1 is connected to the plurality of hydraulic cylinders 2 through a pipeline 10, and the power element 1 is used to output hydraulic oil; a control element 3, the control element 3 is arranged in the pipeline 10 and is used to control the working parameters of the hydraulic oil in each hydraulic cylinder 2, and the hydraulic cylinder 2 is used to drive the corresponding rolling roller 100 to move. Each hydraulic cylinder 2 is independently controlled by the control element 3, which can reduce the difficulty of controlling the rolling roller 100 in the hydraulic system and ensure the stability of the operation of the roller press.

[0088] In one embodiment, the hydraulic system includes four hydraulic cylinders 2, and the roller press includes four rollers 100 arranged in sequence at intervals. The four hydraulic cylinders 2 control the movement of the four rollers 100 one by one, so that when the hydraulic cylinders 2 perform independent pressure control, they can complete the precise control of the pressure in different roller gaps between any two adjacent rollers 100.

[0089] Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A hydraulic system for a roller press, characterized in that: include: A power element (1) and a plurality of hydraulic cylinders (2), wherein the power element (1) is connected to the plurality of hydraulic cylinders (2) via a pipeline (10), and the power element (1) is used to output hydraulic oil; A control element (3), wherein the control element (3) is arranged in the pipeline (10) and is used to control the working parameters of the hydraulic oil in each of the hydraulic cylinders (2), and the hydraulic cylinder (2) is used to drive the corresponding roller (100) to move.

2. The hydraulic system according to claim 1, characterized in that: The pipeline (10) comprises an input main pipeline (101) and a plurality of input branches (102), one end of the plurality of input branches (102) is connected to the input main pipeline (101), and the other end of the plurality of input branches (102) is correspondingly connected to the plurality of hydraulic cylinders (2); A plurality of input branches (102) are arranged in parallel.

3. The hydraulic system according to claim 2, characterized in that: The input branch (102) includes a first input pipeline (1021) and a second input pipeline (1022), and the control element (3) includes a first group of control valves (31) and a second group of control valves (32); The power element (1) is connected to the hydraulic cylinder (2) via the first input pipeline (1021) and the second input pipeline (1022); The first group of control valves (31) is arranged on the first input pipeline (1021) to control the extension of the hydraulic cylinder (2), and the second group of control valves (32) is arranged on the second input pipeline (1022) to control the retraction of the hydraulic cylinder (2).

4. The hydraulic system according to claim 3, characterized in that: The control element (3) comprises a distribution valve (33), which is connected to the inlet end of the input branch (102) and is used to distribute the amount of hydraulic oil in the first input pipeline (1021) and the second input pipeline (1022).

5. The hydraulic system according to claim 1, characterized in that: The hydraulic system has a working mode and a debugging mode; When the hydraulic system is in working mode, the power element (1) can deliver hydraulic oil with a first pressure to the hydraulic cylinder (2) through the pipeline (10); when the hydraulic system is in debugging mode, the power element (1) can deliver hydraulic oil with a second pressure to the hydraulic cylinder (2) through the pipeline (10), and the second pressure is lower than the first pressure.

6. The hydraulic system according to claim 1, characterized in that: It also includes an auxiliary element (4), wherein the auxiliary element (4) includes an oil storage tank (41), and the oil storage tank (41) is connected to the power element (1) and is used to provide hydraulic oil.

7. The hydraulic system according to claim 6, characterized in that: The auxiliary element (4) comprises a first filter (42), an accumulator (43) and a safety module (44), wherein the first filter (42), the accumulator (43) and the safety module (44) are connected to the pipeline (10).

8. The hydraulic system according to claim 6, characterized in that: The auxiliary element (4) comprises a return path (45), a heat exchanger (46) and a second filter (47), one end of the return path (45) is connected to the discharge port of the hydraulic cylinder (2), and the other end of the return path (45) is connected to the oil storage tank (41); The heat exchanger (46) and the second filter (47) are disposed in the return path (45).

9. The hydraulic system according to claim 6, characterized in that: The power element (1) comprises a motor (11) and a hydraulic pump (12), wherein the motor (11) is connected to the hydraulic pump (12) and is used to drive the hydraulic pump (12) to operate, and an outlet end of the hydraulic pump (12) is connected to the plurality of hydraulic cylinders (2) via a pipeline (10); The outlet end of the hydraulic pump (12) is provided with a regulating valve (13), and the regulating valve (13) is used to release the hydraulic oil reaching a set pressure to the hydraulic cylinder (2), and can return the hydraulic oil to the oil storage tank (41) through a relief valve.

10. A roller press, characterized in that: Comprising a plurality of rollers (100) and a hydraulic system as claimed in any one of claims 1 to 9; The plurality of hydraulic cylinders (2) are correspondingly connected to the plurality of rollers (100) and are capable of driving the rollers (100) to move, and the adjacent rollers (100) are used to roll the battery membrane.

Images