Leakage monitoring system for hydraulic system of vulcanizing machine

Abstract

The utility model discloses a leakage monitoring system for a hydraulic system of a vulcanizing machine, which belongs to the technical field of tire production equipment and comprises a plurality of oil cylinders, and rod cavities and rodless cavities are arranged in the oil cylinders; the rodless cavity is communicated with a high-pressure oil branch; a first valve and a first pressure measuring assembly are arranged on the high-pressure oil branch; all the high-pressure oil branches are connected in parallel and then are communicated with the high-pressure oil main path; the high-pressure oil main path is communicated with an oil tank; a second valve and a third valve are arranged on the high-pressure oil main line, and a second pressure measuring assembly is arranged on an oil line between the second valve and the first valve; a third pressure measuring assembly is arranged on the part between the third valve and the second valve; the hydraulic oil way communicated with the rod cavity of the oil cylinder is divided into three sections through the first valve, the second valve and the third valve, each section is detected through the first pressure measuring assembly, the second pressure measuring assembly and the third pressure measuring assembly, the abnormal position can be rapidly locked, then a leakage point is found, and a user can conveniently maintain and repair equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of tire production equipment, in particular to a leakage monitoring system for a hydraulic system of a vulcanizer. Background Art

[0002] The power source of many mechanical equipment, represented by vulcanizers, is the hydraulic system. Various actions can be achieved under the drive of the hydraulic system, but the hydraulic system often leaks. When the hydraulic system leaks, the energy efficiency of the hydraulic system decreases, causing power loss, and the stability of the hydraulic system also decreases. In addition, the leaked hydraulic oil will pollute the environment. At the same time, external pollutants are more likely to invade the hydraulic system from the leakage point, forming a vicious circle, which will reduce the service life of the main machine and components in the hydraulic system, and in severe cases will cause the vulcanizer to paralyze.

[0003] Therefore, developing and designing a vulcanizer hydraulic system leakage monitoring system that can promptly detect hydraulic system leakage, accurately determine the leakage area or leakage location, and facilitate maintenance and repair is a problem that needs to be solved urgently at this stage. Utility Model Content

[0004] In order to solve the problems existing in the prior art, the utility model provides a vulcanizer hydraulic system leakage monitoring system, which can divide the hydraulic oil circuit connected to the rod chamber of the oil cylinder into three sections: branch detection area, main detection area and valve group detection area by using the first valve, the second valve and the third valve, and respectively detect and feedback each section through the first pressure measuring component, the second pressure measuring component and the third pressure measuring component, so as to quickly lock the abnormal position and find the leakage point, which is convenient for users to maintain and repair the equipment, and can avoid the situation where the equipment cannot work normally or even paralyzed due to serious leakage, and can also avoid large-scale leakage of hydraulic oil to pollute the environment.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] The utility model provides a leakage monitoring system for a hydraulic system of a vulcanizing machine, comprising:

[0007] A plurality of oil cylinders, wherein the oil cylinders have mutually isolated rod chambers and rodless chambers; the rod chambers are connected to a low-pressure oil branch; the rodless chambers are connected to a high-pressure oil branch; a first valve is provided on the high-pressure oil branch, the oil circuit between the oil cylinders and the first valve forms a branch detection area, and a first pressure measurement component is provided on the branch detection area;

[0008] A high-pressure oil main circuit, all of the high-pressure oil branches are connected in parallel and connected to the high-pressure oil main circuit; the high-pressure oil main circuit is connected to a high-pressure oil return pipeline, and the high-pressure oil return pipeline is connected to an oil tank; a second valve is provided on the high-pressure oil main circuit, and the oil circuit between the second valve and the first valve forms a main circuit detection area, and a second pressure measuring component is provided on the main circuit detection area; a third valve is provided on the high-pressure oil return pipeline, and the oil circuit between the third valve and the second valve forms a valve group detection area, and a third pressure measuring component is provided on the valve group detection area.

[0009] As a preferred technical solution, it also includes a controller; the first pressure measuring component, the second pressure measuring component and the third pressure measuring component are all connected to the controller; the first valve and the third valve are both connected to the controller.

[0010] As a preferred technical solution, the first pressure measurement component, the second pressure measurement component and the third pressure measurement component are all configured as pressure sensors;

[0011] And / or, the first valve and the third valve are both configured as solenoid valves;

[0012] And / or, the second valve is configured as a ball valve;

[0013] And / or, the controller is configured as a PLC.

[0014] As a preferred technical solution, the high-pressure oil main circuit is connected to a high-pressure oil pump, and a first one-way valve is provided between the high-pressure oil pump and the high-pressure oil main circuit.

[0015] As a preferred technical solution, the high-pressure oil main circuit is connected to an overflow pipeline, the overflow pipeline is connected to the oil tank, and an overflow valve is provided on the overflow pipeline;

[0016] And / or, the high-pressure oil main circuit is connected to a pressure gauge;

[0017] And / or, the high-pressure oil main circuit is connected to an accumulator;

[0018] And / or, the number of the high-pressure oil return pipelines is two.

[0019] As a preferred technical solution, it also includes a low-pressure oil main circuit, and all the low-pressure oil branches are connected in parallel to the low-pressure oil main circuit.

[0020] As a preferred technical solution, the low-pressure oil main circuit is connected to a low-pressure oil pump, and a second one-way valve, a reversing valve and a first one-way throttle valve are sequentially provided on the part of the low-pressure oil main circuit located between the low-pressure oil pump and the low-pressure oil branch circuit; the low-pressure oil main circuit is connected to a low-pressure oil return pipeline through the reversing valve, and the low-pressure oil return pipeline is connected to the oil tank.

[0021] As a preferred technical solution, a hydraulically controlled one-way valve is provided between the high-pressure oil main circuit and the low-pressure oil main circuit; the hydraulically controlled one-way valve is connected to the first one-way throttle valve, the second valve and the reversing valve through oil circuits respectively; a second one-way throttle valve is provided on the oil circuit between the hydraulically controlled one-way valve and the reversing valve.

[0022] As a preferred technical solution, oil receivers are provided below the parallel connection of the high-pressure oil branches, the parallel connection of the low-pressure oil branches, the connection between the high-pressure oil branches and the high-pressure oil main circuit, and the connection between the low-pressure oil branches and the low-pressure oil main circuit. A liquid level measuring component is provided in the oil receiver, and the liquid level measuring component is connected to the controller.

[0023] As a preferred technical solution, the specifications of the multiple oil cylinders are the same;

[0024] And / or, the plurality of oil cylinders are located on the same circle and are evenly distributed;

[0025] And / or, a fourth valve is provided on the portion of the high-pressure oil branch between the oil cylinder and the first pressure measuring assembly, and a pressure measuring joint is provided on the portion of the high-pressure oil branch between the oil cylinder and the fourth valve.

[0026] The beneficial effects of the utility model are as follows:

[0027] 1. The utility model utilizes the first valve, the second valve and the third valve to divide the hydraulic oil circuit connected to the rodless chamber of the oil cylinder into three sections: a branch detection area, a main detection area and a valve group detection area, and respectively detects each section through the first pressure measuring component, the second pressure measuring component and the third pressure measuring component and feedbacks the judgment, which can quickly lock the abnormal position and then find the leakage point, making it convenient for users to maintain and repair the equipment, avoiding the situation where the equipment cannot work normally or even paralyzed due to serious leakage, and avoiding the pollution of the environment by a large amount of hydraulic oil leakage.

[0028] 2. The utility model is provided with an oil receiver below the connection of the hydraulic oil circuit, and a liquid level measuring component is provided in the oil receiver. When leakage occurs at the connection, the liquid level measuring component can measure the leaked hydraulic oil from the oil receiver in real time, and can lock the abnormal position and find the leakage point in the first time. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of an embodiment of a leakage monitoring system for a hydraulic system of a vulcanizing machine of the utility model;

[0030] Figure 2 for Figure 1 Structural schematic diagram of the high pressure oil branch in FIG.

[0031] Figure 3 for Figure 1 Schematic diagram of the structure of the high-pressure oil main circuit.

[0032] In the figure: 1-oil cylinder, 11-rod chamber, 12-rodless chamber, 13-piston rod, 2-low-pressure oil branch, 3-high-pressure oil branch, 31-first valve, 32-first pressure measuring assembly, 33-fourth valve, 34-pressure measuring joint, 4-high-pressure oil main circuit, 41-second valve, 42-second pressure measuring assembly, 43-third valve, 44-third pressure measuring assembly, 45-high-pressure oil pump, 451-first one-way valve, 46-overflow valve, 47-inspection plate, 48-pressure gauge, 49-accumulator, 5-low-pressure oil main circuit, 51-low-pressure oil pump, 52-second one-way valve, 53-reversing valve, 54-first one-way throttle valve, 6-oil tank, 7-hydraulic one-way valve, 71-second one-way throttle valve, 8-oil receiver. DETAILED DESCRIPTION

[0033] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0034] Please refer to Figure 1-Figure 3, which is an embodiment of a leakage monitoring system for a vulcanizing machine hydraulic system provided by the utility model, comprises a plurality of oil cylinders 1, wherein the oil cylinder 1 has a rod chamber 11 and a rodless chamber 12 isolated from each other; the rod chamber 11 is connected with a low-pressure oil branch 2; the rodless chamber 12 is connected with a high-pressure oil branch 3, and all the high-pressure oil branches 3 are connected in parallel with a high-pressure oil main circuit 4, and the high-pressure oil main circuit 4 is connected with a high-pressure oil return pipeline, and the high-pressure oil return pipeline is connected with an oil tank 6; when the piston rods 13 of all the oil cylinders 1 move to realize the extension action, the hydraulic oil can enter the rodless chamber 12 along the high-pressure oil main circuit 4 and the high-pressure oil branch 3; when the piston rods 13 of all the oil cylinders 1 move to realize the retraction action, the excess hydraulic oil flows back to the oil tank 6 along the rodless chamber 12, the high-pressure oil branch 3, the high-pressure oil main circuit 4 and the high-pressure oil return pipeline; a first valve 31 is provided on the high-pressure oil branch 3, and the oil cylinder 1 is connected to the first valve 31 The oil circuit between them forms a branch detection area, and a first pressure measuring component 32 is provided on the branch detection area; a second valve 41 is provided on the high-pressure oil main circuit 4, and the oil circuit between the second valve 41 and the first valve 31 forms a main detection area, and a second pressure measuring component 42 is provided on the main detection area; a third valve 43 is provided on the high-pressure return oil pipeline, and the oil circuit between the third valve 43 and the second valve 41 forms a valve group detection area, and a third pressure measuring component 44 is provided on the valve group detection area. The first valve 31, the second valve 41 and the third valve 43 can divide the hydraulic oil circuit connecting the oil tank 6 and the rodless chamber 12 of the oil cylinder 1 into three sections: a branch detection area, a main detection area and a valve group detection area, and each section is detected and fed back through the first pressure measuring component 32, the second pressure measuring component 42 and the third pressure measuring component 44 respectively, which can quickly lock the abnormal position and then find the leakage point.

[0035] It should be noted that the multiple cylinders 1 of the present invention are applied to the vulcanizer, and the specifications of the multiple cylinders 1 should be the same. At the same time, the multiple cylinders 1 should be located on the same circle and evenly distributed. The synchronous movement of the piston rods 13 of the multiple cylinders 1 can ensure the synchronization and stability of the vulcanizer during operation.

[0036] Specifically, the utility model should also include a controller; the first pressure measuring component 32, the second pressure measuring component 42 and the third pressure measuring component 44 are all connected to the controller, the first valve 31 and the third valve 43 are all connected to the controller, the first valve 31 and the third valve 43 can be controlled to be on and off by the controller, and the measurement information of the first pressure measuring component 32, the second pressure measuring component 42 and the third pressure measuring component 44 can be sent to the controller for the convenience of the user to know; further, the first pressure measuring component 32, the second pressure measuring component 42 and the third pressure measuring component 44 are preferably configured as pressure sensors, the first valve 31 and the third valve 43 are preferably configured as solenoid valves, the second valve 41 is preferably configured as a ball valve, and the controller is preferably configured as a PLC; further, the controller is also preferably connected to an alarm, and when the pressure of the hydraulic oil circuit is abnormal, the controller issues an alarm prompt through the alarm.

[0037] In this embodiment, please refer to Figure 1 and Figure 3 The high-pressure oil main circuit 4 is connected to a high-pressure oil pump 45, which can make the hydraulic oil flow to the rodless chamber 12 of the cylinder 1; a first one-way valve 451 is provided between the high-pressure oil pump 45 and the high-pressure oil main circuit 4, and the first one-way valve 451 can prevent the hydraulic oil from flowing to the high-pressure oil pump 45; specifically, the high-pressure oil pump 45 is connected to a controller, and the controller can control the switch and working intensity of the high-pressure oil pump 45.

[0038] Based on the above examples, please refer to Figure 1 and Figure 3 Preferably, two high-pressure oil return pipelines are provided between the high-pressure oil main circuit 4 and the oil tank 6, which can effectively ensure the return of the hydraulic oil.

[0039] For details, please refer to Figure 1 and Figure 3 The high-pressure oil main circuit 4 is connected with an overflow pipeline, the overflow pipeline is connected with the oil tank 6, and the oil tank 6 receives the overflowed hydraulic oil through the overflow pipeline; accordingly, an overflow valve 46 is provided on the overflow pipeline.

[0040] For further information, please refer to Figure 1 and Figure 3 The high-pressure oil main circuit 4 should also be connected to a pressure gauge 48, through which the pressure of the high-pressure oil main circuit 4 can be visually observed; further, the high-pressure oil main circuit 4 is also connected to an accumulator 49 to ensure that the pressure of the entire hydraulic oil circuit is normal and stable.

[0041] For clarification, please refer to Figure 1 and Figure 2A fourth valve 33 is provided on the portion of the high-pressure oil branch 3 located between the oil cylinder 1 and the first pressure measuring component 32. The fourth valve 33 is preferably set as a ball valve, which can conveniently control the on and off of the high-pressure oil branch 3; a pressure measuring joint 34 is provided on the portion of the high-pressure oil branch 3 located between the oil cylinder 1 and the fourth valve 33, and the pressure of the high-pressure oil branch 3 can be manually measured through the pressure measuring joint 34.

[0042] In this embodiment, please refer to Figure 1 The utility model should also include a low-pressure oil main circuit 5, and all the low-pressure oil branches 2 are connected in parallel to the low-pressure oil main circuit 5. The hydraulic oil can enter the rod chamber 11 along the low-pressure oil main circuit 5 and the low-pressure oil branch circuit 2, and cooperate with the hydraulic oil in the rodless chamber 12 to move the piston rods 13 of all the oil cylinders 1 more smoothly to achieve the retraction action.

[0043] For details, please refer to Figure 1 The low-pressure oil main circuit 5 is connected to a low-pressure oil pump 51, which can make the hydraulic oil flow to the rod chamber 11 of the cylinder 1; the part of the low-pressure oil main circuit 5 located between the low-pressure oil pump 51 and the low-pressure oil branch circuit 2 is provided with a second one-way valve 52, a reversing valve 53 and a first one-way throttle valve 54 in sequence, the second one-way valve 52 can prevent the hydraulic oil from flowing to the low-pressure oil pump 51, and the first one-way throttle valve 54 can control the flow rate of the hydraulic oil; further, the low-pressure oil pump 51 is connected to a controller, and the controller can control the switch and working intensity of the low-pressure oil pump 51.

[0044] For further information, please refer to Figure 1 A reversing valve 53 is provided on the part of the low-pressure oil main circuit 5 between the second one-way valve 52 and the first one-way throttle valve 54, and the oil tank 6 is connected to the reversing valve 53 through a low-pressure return oil pipeline; at the same time, a hydraulically controlled one-way valve 7 is provided between the high-pressure oil main circuit 4 and the low-pressure oil main circuit 5; the hydraulically controlled one-way valve 7 is arranged between the first one-way throttle valve 54, the second valve 41 and the reversing valve 53; a second one-way throttle valve 71 is provided on the oil circuit between the hydraulically controlled one-way valve 7 and the reversing valve 53, and when the reversing valve 53 is pressure-maintained in the middle position, the reversing valve 53 connects the circuit where the second one-way throttle valve 71 is located with the oil tank 6, and can return oil, thereby preventing back pressure on the circuit where the second one-way throttle valve 71 is located, and the hydraulic oil opens the second one-way throttle valve 71 to enter the high-pressure oil main circuit 4, affecting the stability of the oil circuit; specifically, the reversing valve 53 is connected to a controller, and the controller can control the direction and on-off of the oil circuit passing through the reversing valve 53.

[0045] For further information, please refer to Figure 1When the hydraulic oil cannot flow back to the oil tank 6 through the high-pressure oil return pipeline, the low-pressure oil return pipeline or the overflow pipeline, an inspection plate 47 can be added to the oil port of the valve block corresponding to the high-pressure oil return pipeline, the low-pressure oil return pipeline or the overflow pipeline. The oil return situation can be visually observed through the inspection plate 47 to assist in judging the leakage situation.

[0046] In this embodiment, please refer to Figure 1 and Figure 2 An oil receiver 8 is provided below the parallel connection of the high-pressure oil branch 3, the parallel connection of the low-pressure oil branch 2, the connection between the high-pressure oil branch 3 and the high-pressure oil main circuit 4, and the connection between the low-pressure oil branch 2 and the low-pressure oil main circuit 5. The oil receiver 8 can receive the hydraulic oil leaked from the connection. A liquid level measuring component is provided in the oil receiver 8, and the liquid level measuring component is connected to the controller. The liquid level measuring component can measure the leaked hydraulic oil from the oil receiver 8 in real time, and can lock the abnormal position and find the leakage point at the first time; specifically, the liquid level measuring component is preferably set as a liquid level sensor, and the liquid level sensor is connected to the controller.

[0047] Please refer to Figure 1-Figure 3 , the specific monitoring method of the utility model is as follows:

[0048] When the utility model is in normal operation, the first valve 31 and the second valve 41 are both in an open state, the hydraulically controlled one-way valve 7 can realize the pressure-maintaining function, and the pressure values ​​measured by all the pressure measuring components are equal;

[0049] When the pressure value measured by a certain pressure measuring component in the utility model frequently decreases, it can be determined that there is a leakage;

[0050] Close all the first valves 31, and the first pressure measuring components 32 continuously measure the pressure information on the high-pressure oil branch 3 (i.e., the branch detection area) between the oil cylinder 1 and the first valve 31; when the pressure value measured by a certain first pressure measuring component 32 decreases, it can be determined that the high-pressure oil branch 3 where the first pressure measuring component 32 is installed is leaking or the corresponding oil cylinder 1 is leaking; when the pressure values ​​collected by all the first pressure measuring components 32 meet the standards, it can be determined that there is no leakage in all the high-pressure oil branches 3 between the oil cylinder 1 and the first valve 31;

[0051] When there is no leakage in the high-pressure oil branch 3 between the oil cylinder 1 and the first valve 31, the second valve 41 is closed, and the second pressure measuring component 42 continuously measures the pressure information of the hydraulic oil circuit (i.e., the main circuit detection area) between the first valve 31 and the second valve 41; the third pressure measuring component 44 continuously measures the pressure information of the high-pressure oil main circuit 4 (i.e., the valve group detection area) between the second valve 41 and the valve group (the third valve 43, the first one-way valve 451, the relief valve 46 and the hydraulic one-way valve 7); when the pressure value measured by the second pressure measuring component 42 decreases, it can be determined that there is a leakage in the hydraulic oil circuit between the first valve 31 and the second valve 41; when the pressure value measured by the third pressure measuring component 44 decreases, it can be determined that there is a leakage in the high-pressure oil main circuit 4 between the second valve 41 and the valve group; when the pressure values ​​collected by the second pressure measuring component 42 and the third pressure measuring component 44 are up to standard, it can be determined that there is no leakage in the hydraulic oil circuit between the first valve 31 and the valve group;

[0052] When there is no leakage in the hydraulic oil circuit between the first valve 31 and the valve group, the inspection plate 47 and the high-pressure oil return line, low-pressure oil return line and overflow line directly connected to the oil tank 6 are disassembled, and it is observed whether hydraulic oil continues to flow out. When hydraulic oil continues to flow out from the return oil pipe or the inspection plate 47, it can be determined that the corresponding valve group has a leakage.

[0053] In addition, an oil receiver 8 is preferably provided at the connection point of the hydraulic oil circuit, the hydraulic valve group and under the hydraulic station. The liquid level sensor installed at the lowest point of the oil receiver 8 can detect the hydraulic oil falling into the oil receiver 8 at the first time, and can quickly lock the abnormal position and find the leakage point.

[0054] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A vulcanizing press hydraulic system leakage monitoring system, characterized in that: include: A plurality of oil cylinders (1), wherein the oil cylinders (1) have mutually isolated rod chambers (11) and rodless chambers (12); the rod chambers (11) are connected to a low-pressure oil branch (2); the rodless chambers (12) are connected to a high-pressure oil branch (3); a first valve (31) is provided on the high-pressure oil branch (3); the oil circuit between the oil cylinders (1) and the first valve (31) forms a branch detection area, and a first pressure measurement component (32) is provided on the branch detection area; A high-pressure oil main circuit (4), all of the high-pressure oil branches (3) are connected in parallel and connected to the high-pressure oil main circuit (4); the high-pressure oil main circuit (4) is connected to a high-pressure oil return pipeline, and the high-pressure oil return pipeline is connected to an oil tank (6); a second valve (41) is provided on the high-pressure oil main circuit (4), the oil circuit between the second valve (41) and the first valve (31) forms a main circuit detection area, and a second pressure measurement component (42) is provided on the main circuit detection area; a third valve (43) is provided on the high-pressure oil return pipeline, the oil circuit between the third valve (43) and the second valve (41) forms a valve group detection area, and a third pressure measurement component (44) is provided on the valve group detection area.

2. A vulcanizing press hydraulic system leakage monitoring system according to claim 1, characterized in that: It also includes a controller; the first pressure measuring component (32), the second pressure measuring component (42) and the third pressure measuring component (44) are all connected to the controller; the first valve (31) and the third valve (43) are all connected to the controller.

3. A vulcanizing press hydraulic system leakage monitoring system according to claim 2, characterized in that: The first pressure measurement component (32), the second pressure measurement component (42) and the third pressure measurement component (44) are all configured as pressure sensors; and / or, the first valve (31) and the third valve (43) are both configured as solenoid valves; And / or, the second valve (41) is configured as a ball valve; And / or, the controller is configured as a PLC.

4. A vulcanizing press hydraulic system leakage monitoring system according to claim 2, characterized in that: The high-pressure oil main circuit (4) is connected to a high-pressure oil pump (45), and a first one-way valve (451) is provided between the high-pressure oil pump (45) and the high-pressure oil main circuit (4).

5. A vulcanizing press hydraulic system leakage monitoring system according to claim 4, characterized in that: The high-pressure oil main circuit (4) is connected to an overflow pipeline, the overflow pipeline is connected to the oil tank (6), and an overflow valve (46) is provided on the overflow pipeline; and / or, the high-pressure oil main circuit (4) is connected to a pressure gauge (48); And / or, the high-pressure oil main circuit (4) is connected to an accumulator (49); And / or, the number of the high-pressure oil return pipelines is two.

6. A vulcanizing press hydraulic system leakage monitoring system according to claim 4, characterized in that: It also comprises a low-pressure oil main circuit (5), and all the low-pressure oil branch circuits (2) are connected in parallel and communicated with the low-pressure oil main circuit (5).

7. A vulcanizing press hydraulic system leakage monitoring system according to claim 6, characterized in that: The low-pressure oil main circuit (5) is connected to a low-pressure oil pump (51), and a second one-way valve (52), a reversing valve (53) and a first one-way throttle valve (54) are sequentially provided on a portion of the low-pressure oil main circuit (5) located between the low-pressure oil pump (51) and the low-pressure oil branch circuit (2); the low-pressure oil main circuit (5) is connected to a low-pressure oil return pipeline through the reversing valve (53), and the low-pressure oil return pipeline is connected to the oil tank (6).

8. A vulcanizing press hydraulic system leakage monitoring system according to claim 7, characterized in that: A hydraulically controlled one-way valve (7) is provided between the high-pressure oil main circuit (4) and the low-pressure oil main circuit (5); the hydraulically controlled one-way valve (7) is connected to the first one-way throttle valve (54), the second valve (41) and the reversing valve (53) through pipelines; and a second one-way throttle valve (71) is provided on the oil circuit between the hydraulically controlled one-way valve (7) and the reversing valve (53).

9. A vulcanizing press hydraulic system leakage monitoring system according to claim 6, characterized in that: An oil receiver (8) is provided below the parallel connection of the high-pressure oil branch (3), the parallel connection of the low-pressure oil branch (2), the connection between the high-pressure oil branch (3) and the high-pressure oil main circuit (4), and the connection between the low-pressure oil branch (2) and the low-pressure oil main circuit (5). A liquid level measuring component is provided in the oil receiver (8), and the liquid level measuring component is connected to the controller.

10. A vulcanizing press hydraulic system leakage monitoring system according to claim 1, characterized in that: The specifications of the multiple oil cylinders (1) are the same; And / or, the plurality of oil cylinders (1) are located on the same circle and are evenly distributed; And / or, a fourth valve (33) is provided on the portion of the high-pressure oil branch (3) located between the oil cylinder (1) and the first pressure measuring assembly (32), and a pressure measuring joint (34) is provided on the portion of the high-pressure oil branch (3) located between the oil cylinder (1) and the fourth valve (33).

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