A hydraulic circuit system for controlling a master cylinder and an upper die

Abstract

The utility model discloses a kind of hydraulic oil path systems of controlling main cylinder and upper die, including oil cylinder, the piston rod in the oil cylinder of being arranged, the piston rod divides the oil cylinder into piston cavity and piston rod cavity, further include the first oil path mechanism being communicated with the piston cavity, the second oil path mechanism being communicated with the piston rod cavity and the distribution valve being communicated with the first oil path mechanism and the second oil path mechanism simultaneously, the first oil path mechanism includes first valve, and the second oil path mechanism includes second valve.Using the utility model, it can simplify control component, reduce production cost, and can guarantee the working efficiency and stability of brick machine.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic circuit control system technology, and in particular to a hydraulic circuit system for controlling the master cylinder and the upper mold. Background Technology

[0002] During the operation of the brick press, the hydraulic oil circuit system control of the main cylinder and the upper mold is crucial. It needs to realize a series of functions such as pressurization, depressurization, upper mold lifting and lowering to ensure the normal operation of the brick press and the quality of the brick products.

[0003] Existing hydraulic circuit systems for the main cylinder and upper mold of brick presses typically employ multiple distribution valves to control different working processes. Specifically, during pressurization, one distribution valve is needed to control the flow of pressurized oil into the piston chamber; while during depressurization, another distribution valve is required to discharge the pressurized oil from the piston chamber. Similarly, for the lifting and lowering of the upper mold, different distribution valves are needed in the second hydraulic circuit mechanism: one to control the flow of pressurized oil into the piston rod chamber to raise the piston rod, and another to control the discharge of pressurized oil from the piston rod chamber to lower the piston rod.

[0004] This control method using multiple distribution valves has significant drawbacks. First, the use of multiple distribution valves complicates the entire hydraulic circuit system, requiring more hydraulic lines and control components to connect the various distribution valves, increasing the difficulty of system design and installation. Second, the increased number of components directly leads to higher costs, including the purchase cost of the distribution valves themselves and the costs of related pipes, connectors, and other accessories. Furthermore, the complex system is more prone to malfunctions during operation, and coordination issues between the multiple distribution valves may arise, affecting the working efficiency and stability of the brick press. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a hydraulic oil circuit system for controlling the main cylinder and the upper mold, which can simplify the control components, reduce production costs, and ensure the working efficiency and stability of the brick press.

[0006] To solve the above-mentioned technical problems, this utility model provides a hydraulic circuit system for controlling the master cylinder and the upper mold, including a cylinder and a piston rod disposed in the cylinder, wherein the piston rod divides the cylinder into a piston chamber and a piston rod chamber.

[0007] It also includes a first oil passage mechanism communicating with the piston chamber, a second oil passage mechanism communicating with the piston rod chamber, and a distribution valve communicating with both the first oil passage mechanism and the second oil passage mechanism.

[0008] The first oil circuit mechanism includes a first valve, and the second oil circuit mechanism includes a second valve.

[0009] When the first end of the distribution valve is connected to the first valve, pressurized oil can enter the piston chamber to achieve pressurization.

[0010] When the second end of the distribution valve is connected to the first valve, the pressurized oil in the piston chamber can be discharged from the distribution valve to achieve pressure relief.

[0011] When the first end of the distribution valve is connected to the second valve, pressurized oil can enter the piston rod chamber to achieve the rise of the piston rod.

[0012] When the second end of the distribution valve is connected to the second valve, the pressurized oil in the piston rod chamber can be discharged from the distribution valve to achieve the descent of the piston rod.

[0013] As an improvement to the above solution, the hydraulic circuit system for controlling the master cylinder and the upper mold further includes a main oil circuit. The first oil circuit mechanism includes a first oil circuit that is connected to the first valve. The second oil circuit mechanism includes a second oil circuit that is connected to the second valve. One end of the main oil circuit can be connected to either the first or the second end of the distribution valve, and the other end of the main oil circuit can be connected to both the first and the second oil circuits simultaneously.

[0014] As an improvement to the above solution, the hydraulic circuit system for controlling the master cylinder and the upper mold further includes a pressure oil pipe and a distribution oil tank. The pressure oil pipe is connected to an external pressure oil source. The two ends of the first end can be connected to the pressure oil pipe and the main oil circuit respectively, and the two ends of the second end can be connected to the distribution oil tank and the main oil circuit respectively.

[0015] As an improvement to the above solution, the first oil circuit mechanism further includes a third valve, which is arranged in parallel with the first valve. One end of the third valve is connected to the piston chamber through the first oil distribution circuit, and the other end of the third valve is connected to the first oil tank. The first valve is connected to the first oil distribution circuit.

[0016] As an improvement to the above solution, the second oil circuit mechanism further includes a fourth valve, which is arranged in parallel with the second valve. One end of the fourth valve is connected to the piston rod chamber through the second oil distribution circuit, and the other end of the fourth valve is connected to the second oil tank. The second valve is connected to the second oil distribution circuit.

[0017] As an improvement to the above solution, the hydraulic circuit system for controlling the master cylinder and the upper mold further includes a filling valve and a filling oil tank. One end of the filling valve is connected to the filling oil tank, and the other end of the filling valve is connected to the piston chamber.

[0018] As an improvement to the above solution, the second oil circuit mechanism further includes a safety valve, which is connected to the second oil distribution line.

[0019] Implementing this utility model has the following beneficial effects:

[0020] This invention relates to a hydraulic circuit system for controlling the main cylinder and the upper mold, which includes a distribution valve that simultaneously connects to both the first and second hydraulic circuit mechanisms. The distribution valve, through its first or second end connected to a first valve / second valve, can respectively achieve pressurization and depressurization of the main cylinder and raising and lowering of the upper mold. This single-valve multi-mode control not only simplifies the control circuit, saves control components, and reduces production costs, but also avoids the action delays or circuit interference problems that may occur with multi-valve coordination, ensuring coordinated hydraulic control at each working stage and guaranteeing the efficiency and stability of the brick press's operation. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the hydraulic oil circuit system for controlling the main cylinder and the upper mold of this utility model;

[0022] Figure 2 This is a schematic diagram of the hydraulic oil circuit system controlling the master cylinder and upper mold of this utility model when pressurized;

[0023] Figure 3 This is a schematic diagram of the hydraulic oil circuit system controlling the main cylinder and the upper mold of this utility model during pressure relief;

[0024] Figure 4 This is a schematic diagram of the hydraulic oil circuit system controlling the main cylinder and the upper mold of this utility model when the upper mold is raised;

[0025] Figure 5 This is a schematic diagram of the hydraulic circuit system controlling the master cylinder and the upper mold of this utility model during the descent of the upper mold. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the following will describe this utility model in further detail with reference to the accompanying drawings. It is hereby declared that the terms "up," "down," "left," "right," "front," "back," "inner," and "outer," etc., appearing or about to appear in this document, are based solely on the accompanying drawings and are not intended to specifically limit this utility model.

[0027] See Figure 1-5This utility model discloses a hydraulic circuit system for controlling a master cylinder and an upper mold, including a cylinder 1 and a piston rod 2 disposed within the cylinder 1. The piston rod 2 divides the cylinder 1 into a piston chamber 11 and a piston rod chamber 12. The piston rod 2 moves within the cylinder 1 to achieve the functions of pressurization, depressurization, and raising and lowering of the upper mold. During the movement of the piston rod 2, the volumes of the piston chamber 11 and the piston rod chamber 12 change accordingly. The hydraulic circuit system for controlling the master cylinder and the upper mold also includes a first oil circuit 32 mechanism 3 communicating with the piston chamber 11, a second oil circuit 42 mechanism 4 communicating with the piston rod chamber 12, and a distribution valve 5 communicating with both the first oil circuit 32 mechanism 3 and the second oil circuit 42 mechanism 4. The distribution valve 5 communicates with both the first oil circuit 32 mechanism 3 and the second oil circuit 42 mechanism 4, and the system is controlled by the different communication states of the distribution valve 5.

[0028] The first oil circuit 32 mechanism 3 includes a first valve 31, and the second oil circuit 42 mechanism 4 includes a second valve 41. The first valve 31 and the second valve 41 can be selected as electronic control valves according to actual hydraulic control requirements, and can be switched to open and close according to the conditions of power supply or power failure.

[0029] When the first end 51 of the distribution valve 5 is connected to the first valve 31, pressurized oil can enter the piston chamber 11 to achieve pressurization. When pressurization of the master cylinder is required, the first end 51 of the distribution valve 5 is connected to the first valve 31, and pressurized oil enters the piston chamber 11 through the distribution valve 5 and the first valve 31, pushing the piston rod 2 to move and realize the pressurization process. The pressurization speed can be adjusted according to the opening degree of the distribution valve 5.

[0030] When the second end 52 of the distribution valve 5 is connected to the first valve 31, the pressurized oil in the piston chamber 11 can be discharged from the distribution valve 5 to achieve pressure relief. When pressure relief is required, the second end 52 of the distribution valve 5 is connected to the first valve 31, and the pressurized oil in the piston chamber 11 is discharged through the first valve 31 and the distribution valve 5 to achieve rapid pressure relief. The pressure relief speed can be adjusted according to the opening degree of the distribution valve 5.

[0031] When the first end 51 of the distribution valve 5 is connected to the second valve 41, pressurized oil can enter the piston rod chamber 12 to raise the piston rod 2. When controlling the upper mold lifting, the first end 51 of the distribution valve 5 is connected to the second valve 41, and pressurized oil enters the piston rod chamber 12 through the distribution valve 5 and the second valve 41, pushing the piston rod 2 upward to raise the upper mold. The lifting speed can be adjusted according to the opening degree of the distribution valve 5.

[0032] When the second end 52 of the distribution valve 5 is connected to the second valve 41, the pressurized oil in the piston rod chamber 12 can be discharged from the distribution valve 5 to achieve the descent of the piston rod 2. When the upper mold needs to descend, the second end 52 of the distribution valve 5 is connected to the second valve 41, and the pressurized oil in the piston rod chamber 12 is discharged through the second valve 41 and the distribution valve 5 to achieve the descent of the piston rod 2. The descent speed can be adjusted according to the opening degree of the distribution valve 5.

[0033] Through the above structural design, the distribution valve 5 is directionally connected to the first valve 31 and the second valve 41 via the first end 51 or the second end 52, integrating four control functions—pressurization, depressurization, raising, and lowering—within the same valve body. This single-valve multi-state control mode eliminates the need for independent settings of multiple distribution valves 5 in existing technologies, simplifies the layout and connection of hydraulic circuits, and saves on the procurement and assembly costs of control components. Furthermore, the precise switching of a single valve avoids the action delays or oil circuit interference that may occur in multi-valve systems, making the hydraulic control of the brick press more coordinated and unified at different working stages, effectively ensuring the efficiency and stability of equipment operation.

[0034] The beneficial effects of this utility model embodiment are as follows:

[0035] This embodiment of the invention provides a hydraulic circuit system for controlling the main cylinder and the upper mold, equipped with a distribution valve 5 that simultaneously connects to both the first oil circuit 32 mechanism 3 and the second oil circuit 42 mechanism 4. The distribution valve 5 connects to the first valve 31 / second valve 41 via its first end 51 or second end 52, enabling the pressurization and depressurization of the main cylinder, as well as the raising and lowering of the upper mold. This single-valve multi-mode control simplifies the control circuit, saves control components, and reduces production costs. Furthermore, it avoids the potential for action delays or oil circuit interference that can occur with multi-valve coordination, ensuring coordinated hydraulic control at each working stage and guaranteeing the efficiency and stability of the brick press machine's operation.

[0036] The hydraulic circuit system controlling the master cylinder and upper mold also includes a main oil circuit 6. The first oil circuit 32 mechanism 3 includes a first oil circuit 32, which is connected to the first valve 31. The second oil circuit 42 mechanism 4 includes a second oil circuit 42, which is connected to the second valve 41. One end of the main oil circuit 6 can be connected to either the first end 51 or the second end 52 of the distribution valve 5, and the other end of the main oil circuit 6 can be connected to both the first oil circuit 32 and the second oil circuit 42. The first oil circuit 32 and the second oil circuit 42 are arranged in parallel, and their connection ends are connected to the main oil circuit 6, forming a core hub for oil flow. By opening or closing the first valve 31 or the second valve 41, the flow of pressurized oil in the main oil circuit 6 to the first oil circuit 32 or the second oil circuit 42 can be controlled, avoiding the pipeline redundancy problem caused by independent control of multiple oil circuits in the prior art, and simplifying the complexity of the hydraulic system in terms of layout.

[0037] Furthermore, the hydraulic circuit system controlling the master cylinder and upper mold also includes a pressure oil pipe 7 and a distribution oil tank 71. The pressure oil pipe 7 is connected to an external pressure oil source to provide high-pressure oil to the system, and the distribution oil tank 71 is used to receive low-pressure oil discharged from the system. The two ends of the first end 51 can be connected to the pressure oil pipe 7 and the main oil circuit 6, respectively, and the two ends of the second end 52 can be connected to the distribution oil tank 71 and the main oil circuit 6, respectively. The two ends of the first end 51 of the distribution valve 5 are connected to the pressure oil pipe 7 and the main oil circuit 6, respectively, so that high-pressure oil can be injected into the main oil circuit 6 through the first end 51; the two ends of the second end 52 are connected to the distribution oil tank 71 and the main oil circuit 6, respectively, so that low-pressure oil can flow back to the distribution oil tank 71 through the second end 52. By controlling the on / off state of the first end 51, the second end 52 and the main oil circuit 6 through the distribution valve 5, the input of pressure oil and the output of return oil are integrated into a single valve. Compared with the traditional multi-valve separate control mode, the redundant connection pipeline between the pressure oil source and the oil tank is reduced, and the energy loss and leakage risk of oil during transmission are reduced.

[0038] The first oil circuit 32 mechanism 3 also includes a third valve 33, which is connected in parallel with the first valve 31. One end of the third valve 33 is connected to the piston chamber 11 through the first oil distribution circuit 34, and the other end of the third valve 33 is connected to the first oil tank 35, forming a pressure relief branch independent of the first valve 31. The first valve 31 is connected to the first oil distribution circuit 34. When the third valve 33 is open and the first valve 31 is closed, the pressurized oil in the piston chamber 11 can be discharged to the first oil tank 35 through the third valve 33, or the piston chamber 11 can draw oil from the first oil tank 35 to balance the pressure. Combined with the pressure relief control of the distribution valve 5 (i.e., the second end 52 is connected to the first valve 31), dual pressure relief protection is achieved. This parallel design provides a redundant pressure relief path for the piston chamber 11 without changing the core control logic of the single valve of the distribution valve 5, improving the safety of the system under abnormal operating conditions, and avoiding the complex linkage control between the independent pressure relief valve and the main control valve in traditional multi-valve systems.

[0039] The second oil circuit 42 mechanism 4 also includes a fourth valve 43, which is arranged in parallel with the second valve 41. One end of the fourth valve 43 is connected to the piston rod chamber 12 through the second oil distribution circuit 44, and the other end of the fourth valve 43 is connected to the second oil tank 46. The second valve 41 is connected to the second oil distribution circuit 44. When the fourth valve 43 is open, the pressurized oil in the piston rod chamber 12 can be discharged to the second oil tank 46 through the fourth valve 43, or the piston rod chamber 12 can draw oil from the second oil tank 46 to balance the pressure. This structural design, while ensuring the main control path of the distribution valve 5 for the lifting and lowering of the piston rod 2, provides an auxiliary oil return channel for the piston rod chamber 12, which is especially suitable for working conditions that require rapid unloading and avoids the flow limitation problem that may exist in single valve control. At the same time, the parallel layout of the fourth valve 43 and the second valve 41 continues the design concept of the single distribution valve 5 core control of this utility model, without adding an additional main control valve, ensuring the overall simplicity and reliability of the system.

[0040] The hydraulic circuit system controlling the master cylinder and upper mold also includes a filling valve 8 and a filling oil tank 81. One end of the filling valve 8 is connected to the filling oil tank 81, and the other end is connected to the piston chamber 11. When the piston rod 2 rises rapidly (i.e., the upper mold rises rapidly), the filling valve 8 opens, allowing the oil in the piston chamber 11 to quickly flow back to the filling oil tank 81, increasing the rising speed of the upper mold. Conversely, when the piston rod 2 descends rapidly (i.e., the upper mold descends rapidly), the filling valve 8 opens, allowing the oil in the filling oil tank 81 to directly fill the piston chamber 11, quickly filling the cavity and increasing the descending speed of the upper mold.

[0041] The second oil circuit 42 mechanism 4 also includes a safety valve 45, which is connected to the second oil distribution circuit 44. The safety valve 45 can monitor the oil pressure in the piston rod chamber 12 in real time. When the pressure in the piston rod chamber 12 exceeds the safety threshold due to a sudden change in load or abnormal control, the safety valve 45 automatically opens, releasing the excess pressurized oil to the external oil tank to prevent high pressure from damaging the piston rod 2 and sealing components. The safety valve 45, together with the second valve 41 and the fourth valve 43, forms a pressure protection synergy, providing independent overload protection for the piston rod chamber 12 without interfering with the main control path of the distribution valve 5 for the rise / fall of the piston rod 2.

[0042] The above are preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.

Claims

1. A hydraulic circuit system for controlling the master cylinder and the upper mold, characterized in that, The system includes a hydraulic cylinder and a piston rod disposed within the hydraulic cylinder, wherein the piston rod divides the hydraulic cylinder into a piston chamber and a piston rod chamber. It also includes a first oil passage mechanism communicating with the piston chamber, a second oil passage mechanism communicating with the piston rod chamber, and a distribution valve communicating with both the first oil passage mechanism and the second oil passage mechanism. The first oil circuit mechanism includes a first valve, and the second oil circuit mechanism includes a second valve; When the first end of the distribution valve is connected to the first valve, pressurized oil can enter the piston chamber to achieve pressurization; When the second end of the distribution valve is connected to the first valve, the pressure oil in the piston chamber can be discharged from the distribution valve to achieve pressure relief; When the first end of the distribution valve is connected to the second valve, pressurized oil can enter the piston rod chamber to achieve the rise of the piston rod; When the second end of the distribution valve is connected to the second valve, the pressurized oil in the piston rod chamber can be discharged from the distribution valve to achieve the descent of the piston rod.

2. The hydraulic circuit system for controlling the master cylinder and upper mold according to claim 1, characterized in that, The hydraulic circuit system for controlling the master cylinder and the upper mold also includes a main oil circuit. The first oil circuit mechanism includes a first oil circuit that is connected to the first valve. The second oil circuit mechanism includes a second oil circuit that is connected to the second valve. One end of the main oil circuit can be connected to either the first or the second end of the distribution valve. The other end of the main oil circuit can be connected to both the first and the second oil circuits simultaneously.

3. The hydraulic circuit system for controlling the master cylinder and the upper mold according to claim 2, characterized in that, The hydraulic circuit system for controlling the master cylinder and the upper mold also includes a pressure oil pipe and a distribution oil tank. The pressure oil pipe is connected to an external pressure oil source. The two ends of the first end can be connected to the pressure oil pipe and the main oil circuit respectively, and the two ends of the second end can be connected to the distribution oil tank and the main oil circuit respectively.

4. The hydraulic circuit system for controlling the master cylinder and the upper mold according to claim 3, characterized in that, The first oil circuit mechanism further includes a third valve, which is arranged in parallel with the first valve. One end of the third valve is connected to the piston chamber through a first oil distribution circuit, and the other end of the third valve is connected to the first oil tank. The first valve is connected to the first oil distribution circuit.

5. The hydraulic circuit system for controlling the master cylinder and the upper mold according to claim 3, characterized in that, The second oil circuit mechanism also includes a fourth valve, which is arranged in parallel with the second valve. One end of the fourth valve is connected to the piston rod chamber through the second oil distribution circuit, and the other end of the fourth valve is connected to the second oil tank. The second valve is connected to the second oil distribution circuit.

6. The hydraulic circuit system for controlling the master cylinder and the upper mold according to claim 1, characterized in that, The hydraulic circuit system for controlling the master cylinder and the upper mold also includes a filling valve and a filling oil tank. One end of the filling valve is connected to the filling oil tank, and the other end of the filling valve is connected to the piston chamber.

7. The hydraulic circuit system for controlling the master cylinder and the upper mold according to claim 5, characterized in that, The second oil circuit mechanism also includes a safety valve, which is connected to the second oil distribution line.

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