An ultra-high-speed opening and closing hydraulic system based on die-casting vacuum system

Abstract

This utility model discloses an ultra-high-speed opening and closing hydraulic system for die-casting vacuum systems, including hydraulic components and a solenoid valve assembly. The solenoid valve assembly is fixed in the die-casting machine position. The hydraulic components and the solenoid valve assembly are connected together through pipelines. The hydraulic components include two profile frames, and a housing is bolted between the two profile frames. A plate-type water-cooled module is bolted to the outer wall of one side of the housing, and the heat-conducting structure of the plate-type water-cooled module extends into the interior of the housing. The plate-type water-cooled module of this utility model ensures stable hydraulic oil temperature and avoids performance degradation due to overheating. The motor pump set provides efficient power output, and various sensors and valves enable real-time monitoring and precise pressure regulation. This integrated design significantly improves the system's response speed, shortens the die-casting cycle, and improves production efficiency and casting quality. At the same time, the connection structure, including oil port welding joints, connecting elbows, unions, and ball valves, ensures the sealing and reliability of the pipeline connection and reduces the risk of leakage.

Description

Technical Field

[0001] This utility model relates to the technical field of hydraulic systems for die-casting machines, and specifically to an ultra-high-speed opening and closing hydraulic system based on a die-casting vacuum system. Background Technology

[0002] A die-casting vacuum system is a crucial device used during the die-casting process to remove air and gases from the mold cavity. By evacuating the cavity before the molten metal is filled, it reduces porosity and oxidation defects in the casting, thereby improving the density, surface quality, and mechanical properties of the casting. The opening and closing hydraulic system of the die-casting vacuum system is the actuator that controls the rapid opening and closing of vacuum valves or mold components, ensuring timely application and release of vacuum during the die-casting cycle. Ultra-high-speed opening and closing hydraulic systems can achieve millisecond-level response times, significantly shortening the die-casting cycle and improving production efficiency and casting consistency.

[0003] For example, patent application CN201520074906.8, with authorization announcement date 20150715, describes an energy-saving hydraulic system for a die-casting machine. This system comprises an electric motor, a hydraulic pump, a mold-closing cylinder, an injection cylinder, a differential mold-closing hydraulic mechanism, a differential injection hydraulic mechanism, a low-pressure mold-closing end-rapid oil unloading hydraulic mechanism, and an oil tank. While maintaining the original performance of the die-casting machine, it replenishes the hydraulic oil that would otherwise return to the oil tank from the rod chambers of the mold-closing and injection cylinders into the die-casting machine's oil supply system, channeling it entirely into the rodless chambers of both cylinders. This completes the mold-closing and slow injection actions. At the end of low-pressure mold-closing and the beginning of high-pressure mold-closing, the remaining hydraulic oil in the rod chamber of the mold-closing cylinder is rapidly unloaded into the oil tank, eliminating the reaction force of the hydraulic oil in the rod chamber on the high-pressure mold-closing and achieving the purpose of high-pressure mold-closing and tight clamping. Through this design, a smaller flow rate hydraulic pump can be selected, and consequently, a smaller power electric motor can be chosen, while maintaining the original technical specifications of the die-casting machine, to achieve energy saving and consumption reduction.

[0004] The traditional hydraulic system and the die-casting vacuum system have insufficient coordinated control, making it difficult to meet the timing requirements of the ultra-high speed opening and closing of the vacuum valve. This directly affects the vacuuming effect and the quality of the casting. In addition, the traditional system has a response delay, which leads to slow valve group action speed and prolongs the die-casting cycle. Therefore, it is urgent to design an ultra-high speed opening and closing hydraulic system based on the die-casting vacuum system to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide an ultra-high-speed opening and closing hydraulic system for die-casting vacuum systems, in order to overcome the above-mentioned shortcomings in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An ultra-high-speed opening and closing hydraulic system for a die-casting vacuum system includes a hydraulic assembly and a solenoid valve assembly. The solenoid valve assembly is fixed at the die-casting machine. The hydraulic assembly and the solenoid valve assembly are connected together via pipelines. The hydraulic assembly includes two profile frames, and a housing is bolted between the two profile frames. A plate-type water-cooled module is bolted to the outer wall of one side of the housing, and the heat-conducting structure of the plate-type water-cooled module extends into the interior of the housing. A motor pump assembly is bolted to one side of the top of the housing. A return oil filter, a liquid level and temperature sensor, and an air filter are bolted to one side of the top of the housing, respectively. A valve block is bolted to one side of the top of the housing, and the valve block is connected to the housing. A pressure transmitter is threaded onto one side of the outer wall of the valve block, and a threaded adapter is threaded onto the other side of the outer wall of the valve block. A hydraulic pipe connector is threaded onto one end of the threaded adapter. A pilot-operated unloading relief valve is bolted to the top of the valve block. A level gauge is bolted to one side of the outer wall of the housing. An oil port welded joint is welded to one side of the outer wall of the housing, and a connecting elbow is threaded onto one end of the oil port welded joint. A union is threaded onto one end of the connecting elbow, and a ball valve is threaded onto one end of the union.

[0008] Furthermore, an oil filling port is provided on one side of the top of the box, an oil unloading port is provided on one side of the outer wall of the box, a window is bolted to one side of the outer wall of the box, and a nameplate is bolted to the other side of the outer wall of the box.

[0009] Furthermore, an electrical box is bolted to one side of the outer wall of one of the profile frames, and the electrical box is electrically connected to the liquid level and temperature sensor, the motor pump set, and the pressure transmitter through wires.

[0010] Furthermore, the solenoid valve assembly includes a support frame, a mounting valve block is bolted to the top of the support frame, and an overflow safety valve is threaded onto the top of the mounting valve block.

[0011] Furthermore, an electromagnetic directional valve is bolted to one side of the outer wall of the valve mounting block, and electromagnetic ball valve one and electromagnetic ball valve two are threaded to one side of the outer wall of the valve mounting block, respectively.

[0012] Furthermore, the return oil filter is equipped with a blockage transmitter, and the pressure setting method of the pilot-operated unloading relief valve is clockwise rotation for pressurization and counterclockwise rotation for depressurization.

[0013] In the above technical solution, the present invention provides an ultra-high-speed opening and closing hydraulic system for die-casting vacuum systems, which has the following advantages:

[0014] (1) The plate-type water-cooled module of this utility model ensures stable hydraulic oil temperature and avoids performance degradation due to overheating. The motor pump set provides efficient power output, and various sensors and valves realize real-time monitoring and precise pressure regulation. This integrated design significantly improves the system response speed, shortens the die-casting cycle, and improves production efficiency and casting quality. At the same time, the connection structure of oil port welding joint, connecting elbow, union and ball valve ensures the sealing and reliability of pipeline connection and reduces the risk of leakage.

[0015] (2) By equipping the return oil filter with a blockage transmitter, a liquid level and temperature sensor and an air filter, the system can monitor the hydraulic oil status and filtration effect in real time. Once the filter is blocked or the oil level is abnormal, an alarm will be triggered, which is convenient for timely maintenance. The liquid level gauge and window installed on one side of the tank make it easy to visually inspect the internal condition of the oil tank. The nameplate provides equipment information, which reduces the difficulty of maintenance. In addition, the electrical box centrally controls the liquid level and temperature sensor, motor pump group and pressure transmitter, realizing intelligent management and improving the stability and service life of the system.

[0016] (3) The modular design of the solenoid valve group of this utility model allows for rapid response to the opening and closing signals of the die-casting vacuum valve, and the overflow safety valve serves as a safety protection to prevent system overpressure. Solenoid ball valve one and solenoid ball valve two are used for pressure holding control to ensure that the pressure of the oil cylinder is stable during the ejection / retraction process. The solenoid valve group is fixed in the die-casting machine position and works in coordination with the hydraulic components, optimizing the vacuum application timing, reducing response delay, and further improving the accuracy and consistency of the die-casting process. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of an ultra-high-speed opening and closing hydraulic system based on a die-casting vacuum system according to the present invention.

[0019] Figure 2 This is a schematic diagram of the hydraulic component structure provided in an embodiment of an ultra-high-speed opening and closing hydraulic system for a die-casting vacuum system according to this utility model.

[0020] Figure 3 This is a schematic diagram of the profile frame, housing, and electrical box structure provided for an embodiment of an ultra-high-speed opening and closing hydraulic system based on a die-casting vacuum system according to this utility model.

[0021] Figure 4This is a schematic diagram of the solenoid valve assembly structure provided in an embodiment of an ultra-high-speed opening and closing hydraulic system for a die-casting vacuum system according to this utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Hydraulic components; 2. Solenoid valve assembly; 3. Profile frame; 4. Housing; 5. Air filter; 6. Liquid level and temperature sensor; 7. Oil port welded joint; 8. Connecting elbow; 9. Union joint; 10. Ball valve; 11. Motor pump assembly; 12. Plate-type water-cooled module; 13. Valve block; 14. Pilot-operated unloading relief valve; 15. Pressure transmitter; 16. Threaded adapter; 17. Hydraulic pipe fitting; 18. Return oil filter; 19. Electrical box; 20. Liquid level gauge; 21. Nameplate; 22. Window; 23. Support frame; 24. Mounting valve block; 25. Solenoid directional valve; 26. Solenoid ball valve one; 27. Solenoid ball valve two; 28. Relief safety valve. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0025] like Figure 1-4 As shown in the figure, this utility model provides an ultra-high-speed opening and closing hydraulic system for a die-casting vacuum system, including a hydraulic component 1 and a solenoid valve group 2. The solenoid valve group 2 is fixed at the die-casting machine position. The hydraulic component 1 and the solenoid valve group 2 are connected together by a pipeline. The hydraulic component 1 includes two profile frames 3, and a housing 4 is bolted between the two profile frames 3. A plate-type water-cooled module 12 is bolted to the outer wall of one side of the housing 4, and the heat-conducting structure of the plate-type water-cooled module 12 extends into the interior of the housing 4. A motor pump group 11 is bolted to one side of the top of the housing 4. A return oil filter 18, a liquid level and temperature sensor 6, and an air filter are bolted to one side of the top of the housing 4, respectively. 5. A valve block 13 is bolted to one side of the top of the housing 4, and the valve block 13 is connected to the housing 4. A pressure transmitter 15 is threaded on one side of the outer wall of the valve block 13. A threaded adapter 16 is threaded on the other side of the outer wall of the valve block 13, and a hydraulic pipe connector 17 is threaded on one end of the threaded adapter 16. A pilot-operated unloading relief valve 14 is bolted to the top of the valve block 13. A level gauge 20 is bolted to one side of the outer wall of the housing 4. An oil port welding joint 7 is welded to one side of the outer wall of the housing 4, and a connecting elbow 8 is threaded on one end of the oil port welding joint 7. A union 9 is threaded on one end of the connecting elbow 8, and a ball valve 10 is threaded on one end of the union 9.

[0026] Specifically, in this embodiment, a hydraulic component 1 and a solenoid valve assembly 2 are included. The solenoid valve assembly 2 is fixed at the die-casting machine position. The hydraulic component 1 and the solenoid valve assembly 2 are connected together through pipelines. The hydraulic component 1 includes two profile frames 3, preferably 1-XJR-ZY-XH627143-000-00. The two profile frames 3 support the entire housing 4 with bolts, providing structural stability and ensuring that the system reduces vibration and deformation during high-speed operation. The housing 4 is bolted between the two profile frames 3. The housing 4 serves as a hydraulic oil tank, storing hydraulic oil and connecting other components with bolts. The housing 4 adopts a semi-enclosed structure to prevent dust and other impurities from entering and keep the oil clean. Bolts are installed on one side of the outer wall of the housing 4. A plate-type water-cooled module 12 is fixedly installed, which provides forced cooling for the hydraulic oil. During system operation, the motor pump unit 11 generates heat, which is removed by the plate-type water-cooled module 12 through water circulation, ensuring stable oil temperature and preventing oil viscosity reduction or performance degradation due to overheating. The heat-conducting structure of the plate-type water-cooled module 12 extends into the housing 4. The motor pump unit 11 is bolted to one side of the top of the housing 4. The motor pump unit 11 is preferably an ABB-2.2KW. As the system power source, the motor drives the oil pump to generate high-pressure oil. The oil pump adopts a horizontal, external design to reduce heat accumulation inside the housing 4, providing efficient power output and supporting ultra-high-speed opening and closing actions. The top of the housing 4 is respectively... The return oil filter 18, liquid level and temperature sensor 6, and air filter 5 are bolted together. The return oil filter 18 is equipped with a blockage transmitter, preferably a Liming RFA-63x20-LY transmitter installed linearly. When hydraulic oil returns to the tank 4, the return oil filter filters impurities in the oil to prevent contamination. If the filter element is blocked, the blockage transmitter will trigger an alarm, prompting maintenance personnel to replace the filter element to ensure system cleanliness. The liquid level and temperature sensor 6 is preferably an LT400-L0350NM sensor, which monitors the liquid level and temperature in the oil tank in real time. When the liquid level is too low or the temperature is abnormal, the sensor transmits a signal to the electrical box 19, triggering an alarm or adjusting the cooling system to prevent system failure due to insufficient oil or overheating. The air filter... The air purifier 5 is preferably a QUQ2, which filters air during the oil tank's breathing process to prevent external contaminants from entering and maintain the purity of the oil. A valve block 13 is bolted to one side of the top of the housing 4. The valve block 13 is fixed to the top of the housing 4 by bolts and communicates with the inside of the housing 4. As the core module of hydraulic control, the valve block integrates multiple valves and connectors to guide the oil flow to the solenoid valve group 2. The valve block 13 is interconnected with the housing 4. A pressure transmitter 15 is threaded on one side of the outer wall of the valve block 13. The pressure transmitter 15 is threaded on one side of the valve block 13 to detect the system pressure in real time and convert the pressure signal into an electrical signal to be transmitted to the electrical box 19 for online monitoring and pressure regulation to ensure that the system operates within the set pressure range.A threaded adapter 16 is threaded onto the outer wall of the other side of valve block 13, and a hydraulic pipe connector 17 is threaded onto one end of the threaded adapter 16. The threaded adapter 16 is installed on the other side of valve block 13, and the hydraulic pipe connector 17 is threaded onto its end for connecting pipelines to solenoid valve assembly 2. These connectors ensure the sealing and reliability of pipeline connections and reduce the risk of leakage. A pilot-operated unloading relief valve 14 is bolted to the top of valve block 13. The pilot-operated unloading relief valve 14 is preferably a DA10-2 pilot-operated unloading relief valve, which is bolted to the top of valve block 13 for adjusting system pressure. Its pressure setting method is clockwise rotation to increase pressure and counterclockwise rotation to decrease pressure. When the system is over-pressurized, the relief valve opens to unload and protect the system safety. A throttle valve is provided below the valve assembly for depressurization during maintenance. The housing 4 A level gauge 20 is bolted to one side of the outer wall of the tank 4, providing a clear display of the oil level for operators to periodically check the tank capacity. An oil port welding joint 7 is welded to one side of the outer wall of the tank 4. One end of the oil port welding joint 7 is threaded with a connecting elbow 8, and the other end of the connecting elbow 8 is threaded with a union 9. A ball valve 10 is threaded onto one end of the union 9. The oil port welding joint 7 is preferably a G half-drain port welding joint, the connecting elbow 8 is preferably 1CG9-30-120G, the union 9 is preferably 2BC-12-30WD, and the ball valve 10 is preferably Q11F-DN20. The union 9 and the ball valve 10 are connected sequentially. These structures are used for oil inlet and outlet pipelines. The ball valve 10 can manually shut off the oil circuit for easy maintenance and repair.

[0027] This utility model provides an ultra-high-speed opening and closing hydraulic system for die-casting vacuum systems. The plate-type water-cooled module 12 ensures stable hydraulic oil temperature and avoids performance degradation due to overheating. The motor pump unit 11 provides efficient power output. Various sensors and valves enable real-time monitoring and precise pressure regulation. This integrated design significantly improves the system's response speed, shortens the die-casting cycle, and enhances production efficiency and casting quality. At the same time, the connection structure, including the oil port welding joint 7, connecting elbow 8, union joint 9, and ball valve 10, ensures the sealing and reliability of the pipeline connection and reduces the risk of leakage.

[0028] In one embodiment provided by this utility model, such as Figure 2-3 As shown, the top of the housing 4 has an oil inlet on one side, and the outer wall of the housing 4 has an oil outlet. A window 22 is bolted to the outer wall of the housing 4, which serves as a cleaning window to facilitate cleaning of the inside of the oil tank during regular maintenance. A nameplate 21 is bolted to the outer wall of the other side of the housing 4. The nameplate 21 provides equipment information, such as model and specifications, to facilitate identification and maintenance.

[0029] In another embodiment provided by this utility model, such as Figure 2-3As shown, an electrical box 19 is bolted to one side of the outer wall of one of the profile frames 3. The electrical box 19 is electrically connected to the liquid level and temperature sensor 6, the motor pump group 11, and the pressure transmitter 15 through wires. The electrical box centrally controls all sensors and actuators to achieve intelligent management, such as monitoring liquid level, temperature, and pressure, and controlling the start and stop of the motor. The electrical box 19 is electrically connected to the liquid level and temperature sensor 6, the motor pump group 11, and the pressure transmitter 15 through wires respectively.

[0030] In another embodiment provided by this utility model, such as Figure 4 As shown, the solenoid valve assembly 2 includes a support frame 23. A mounting valve block 24 is bolted to the top of the support frame 23, serving as the mounting base for the solenoid valve. Internal oil passages connect to various valve components. An overflow safety valve 28 is threaded onto the top of the mounting valve block 24, acting as a safety protection device. When the system pressure abnormally increases, the overflow safety valve opens to release pressure, preventing overpressure damage to components. A solenoid directional valve 25 is bolted to one side of the outer wall of the mounting valve block 24. The solenoid directional valve 25 receives control signals from the electrical box 19 to control the direction of the hydraulic fluid, enabling the cylinder to reciprocate in the pushing and retracting motions. Solenoid ball valve 1 26 and solenoid ball valve 27 are threaded onto one side of the outer wall of the mounting valve block 24, respectively. Solenoid ball valve 1 26 and solenoid ball valve 27 are used for pressure holding control at ports A and B, respectively. During cylinder operation, the solenoid ball valves ensure that the cylinder maintains pressure at specific positions, improving motion accuracy and stability.

[0031] In another embodiment of this utility model, the return oil filter 18 is equipped with a blockage transmitter, and the pressure setting method of the pilot-operated unloading relief valve 14 is clockwise rotation to increase pressure and counterclockwise rotation to decrease pressure.

[0032] Example 1

[0033] An ultra-high-speed opening and closing hydraulic system based on a die-casting vacuum system includes a hydraulic component 1 and a solenoid valve assembly 2. The solenoid valve assembly 2 is fixed at the die-casting machine position. The hydraulic component 1 and the solenoid valve assembly 2 are connected together by a pipeline. The hydraulic component 1 includes two profile frames 3, preferably 1-XJR-ZY-XH627143-000-00. The two profile frames 3 support the entire housing 4 by bolts, providing structural stability and ensuring that the system reduces vibration and deformation during high-speed operation. The housing 4 is bolted between the two profile frames 3. The housing 4 serves as a hydraulic oil tank, storing hydraulic oil and connecting other components by bolts. The housing 4 adopts a semi-enclosed structure to prevent dust and other impurities from entering and to keep the oil clean. A plate-type water-cooled module 12 is bolted to one side of the outer wall of the housing 4. The plate-type water-cooled module 12 provides forced cooling for the hydraulic oil. During system operation, the motor pump unit 11 generates heat, which is removed by the plate-type water-cooled module 12 through water circulation, ensuring stable oil temperature and preventing oil viscosity reduction or performance degradation due to overheating. Furthermore, the heat-conducting structure of the plate-type water-cooled module 12 extends into the interior of the housing 4. A motor pump unit 11 is bolted to one side of the top of the housing 4. The motor pump unit 11 is preferably an ABB-2.2KW. As the system power source, the motor drives the oil pump to generate high-pressure oil. The oil pump adopts a horizontal installation and external design to reduce heat accumulation inside the housing 4, providing efficient power output and supporting ultra-high-speed opening and closing actions. The top side is bolted with a return oil filter 18, a liquid level and temperature sensor 6, and an air filter 5. The return oil filter 18 is equipped with a blockage transmitter, preferably a Liming RFA-63x20-LY transmitter installed in a straight line. When the hydraulic oil returns to the tank 4, the return oil filter filters impurities in the oil to prevent contamination. If the filter element is blocked, the blockage transmitter will trigger an alarm to remind maintenance personnel to replace the filter element and ensure system cleanliness. The liquid level and temperature sensor 6 is preferably an LT400-L0350NM, which monitors the liquid level and temperature in the oil tank in real time. When the liquid level is too low or the temperature is abnormal, the sensor transmits a signal to the electrical box 19 to trigger an alarm or adjust the cooling system to prevent the system from malfunctioning due to insufficient oil or overheating. Air filter 5 is preferably QUQ2, which filters air during the oil tank's breathing process to prevent external contaminants from entering and maintain the purity of the oil. A valve block 13 is bolted to one side of the top of the housing 4. The valve block 13 is fixed to the top of the housing 4 by bolts and communicates with the inside of the housing 4. As the core module of hydraulic control, the valve block integrates multiple valves and connectors to guide the oil flow to the solenoid valve group 2. The valve block 13 is interconnected with the housing 4. A pressure transmitter 15 is threaded on one side of the outer wall of the valve block 13. The pressure transmitter 15 is threaded on one side of the valve block 13 to detect the system pressure in real time and convert the pressure signal into an electrical signal to be transmitted to the electrical box 19 for online monitoring and pressure regulation to ensure that the system operates within the set pressure range.A threaded adapter 16 is threaded onto the outer wall of the other side of valve block 13, and a hydraulic pipe connector 17 is threaded onto one end of the threaded adapter 16. The threaded adapter 16 is installed on the other side of valve block 13, and the hydraulic pipe connector 17 is threaded onto its end for connecting pipelines to solenoid valve assembly 2. These connectors ensure the sealing and reliability of pipeline connections and reduce the risk of leakage. A pilot-operated unloading relief valve 14 is bolted to the top of valve block 13. The pilot-operated unloading relief valve 14 is preferably a DA10-2 pilot-operated unloading relief valve, which is bolted to the top of valve block 13 for adjusting system pressure. Its pressure setting method is clockwise rotation to increase pressure and counterclockwise rotation to decrease pressure. When the system is over-pressurized, the relief valve opens to unload and protect the system safety. A throttle valve is provided below the valve assembly for depressurization during maintenance. The housing 4 A level gauge 20 is bolted to one side of the outer wall of the tank 4, providing a clear display of the oil level for operators to periodically check the tank capacity. An oil port welding joint 7 is welded to one side of the outer wall of the tank 4. One end of the oil port welding joint 7 is threaded with a connecting elbow 8, and the other end of the connecting elbow 8 is threaded with a union 9. A ball valve 10 is threaded onto one end of the union 9. The oil port welding joint 7 is preferably a G half-drain port welding joint, the connecting elbow 8 is preferably 1CG9-30-120G, the union 9 is preferably 2BC-12-30WD, and the ball valve 10 is preferably Q11F-DN20. The union 9 and the ball valve 10 are connected sequentially. These structures are used for oil inlet and outlet pipelines. The ball valve 10 can manually shut off the oil circuit for easy maintenance and repair.

[0034] Example 2

[0035] This embodiment further defines the features of Embodiment 1. Specifically, an oil inlet is located on one side of the top of the tank 4, and an oil outlet is located on one side of the outer wall of the tank 4. A window 22 is bolted to the outer wall of one side of the tank 4, serving as a cleaning window for easy cleaning of the tank's interior during regular maintenance. A nameplate 21 is bolted to the outer wall of the other side of the tank 4, providing equipment information such as model and specifications for easy identification and maintenance. An electrical box 19 is bolted to the outer wall of one of the profile frames 3. The electrical box 19 is electrically connected to the liquid level and temperature sensor 6, the motor pump group 11, and the pressure transmitter 15 via wires. The electrical box centrally controls all sensors and actuators, enabling intelligent management, such as monitoring liquid level, temperature, and pressure, and controlling motor start and stop. The electrical box 19 is electrically connected to the liquid level and temperature sensor 6, the motor pump group 11, and the pressure transmitter 15 via wires. A solenoid valve group 2... The system includes a support frame 23, with a valve block 24 bolted to the top of the support frame 23. The valve block 24 serves as the mounting base for the solenoid valve, and its internal oil passages connect to various valve components. A relief safety valve 28 is threaded onto the top of the valve block 24, acting as a safety protection device. When the system pressure abnormally increases, the relief safety valve opens to release pressure, preventing overpressure damage to components. A solenoid directional valve 25 is bolted to one side of the outer wall of the valve block 24. The solenoid directional valve 25 receives control signals from the electrical box 19 to control the direction of the hydraulic fluid, enabling the cylinder to reciprocate in the pushing and retracting motion. Solenoid ball valve 1 26 and solenoid ball valve 27 are threaded onto one side of the outer wall of the valve block 24, respectively. Solenoid ball valve 1 26 and solenoid ball valve 27 are used for pressure holding control at ports A and B, respectively. During cylinder operation, the solenoid ball valves ensure that the cylinder maintains pressure at specific positions, improving motion accuracy and stability. The return oil filter 18 is equipped with a blockage transmitter, and the pressure setting method of the pilot-operated unloading relief valve 14 is clockwise rotation to increase pressure and counterclockwise rotation to decrease pressure.

[0036] Working Principle: Before system startup, hydraulic oil is first added to tank 4 through the oil filling port on top of the tank, ensuring that the oil level is within the normal range as monitored by level gauge 20 and level-temperature sensor 6. Air filter 5 keeps the tank interior open to the atmosphere to prevent negative pressure formation and filters inhaled air impurities. After the electrical box 19 is powered on, the system performs a self-check. Level-temperature sensor 6 monitors the oil level and temperature in real time. If the oil level is too low or the oil temperature is abnormal, an alarm will be triggered through electrical box 19, prompting maintenance. Pressure transmitter 15 monitors the system pressure to ensure initial safety. The motor-pump unit 11 starts, driving the hydraulic pump to draw hydraulic oil from tank 4. The oil is preliminarily filtered by return oil filter 18 before entering the pump. The high-pressure oil output by the motor-pump unit 11... Liquid enters valve block 13, which serves as the control center and integrates a pilot-operated unloading relief valve 14 and a pressure transmitter 15. The pilot-operated unloading relief valve 14 sets the system working pressure by clockwise rotation to increase pressure and counterclockwise rotation to decrease pressure, ensuring that the pressure remains stable within the set range. The pressure transmitter 15 provides real-time feedback of the pressure signal to the electrical box 19 for precise pressure monitoring. High-pressure oil is transported to solenoid valve group 2 via a threaded adapter 16 and a hydraulic pipe connector 17. Solenoid valve group 2 is fixed at the die-casting machine position and receives control signals from the die-casting machine. The solenoid directional valve 25 mounted on valve block 24 controls the flow direction of the oil according to the signal, driving the cylinder of the die-casting vacuum valve to perform ejection or retraction actions, achieving ultra-high-speed opening and closing. Solenoid ball valve 26 and solenoid valve 25... The magnetic ball valve 27 acts as a pressure-holding valve, maintaining stable pressure during cylinder operation to ensure the accuracy and consistency of the ejection / retraction process. The relief safety valve 28 serves as a safety protection mechanism; when the system pressure abnormally increases, it opens to release pressure and prevent overload damage. The signal from the pressure transmitter 15 is transmitted to the die-casting machine's HMI interface via the electrical box 19, displaying the internal pressure of the cylinder in real time, optimizing vacuum application timing, reducing response delay, and improving die-casting accuracy. During system operation, the hydraulic oil temperature may rise. The plate-type water-cooled module 12 removes heat from the housing 4 through a heat-conducting structure, maintaining stable oil temperature and preventing overheating that could lead to decreased oil performance and reduced system efficiency. The return oil filter 18 continuously filters impurities in the return oil, and its plug... The alarm is triggered when the filter element is clogged, prompting the filter element to be replaced. The level and temperature sensor 6 continuously monitors the oil level and temperature, and the data is processed through the electrical box 19 to achieve intelligent management. The window 22 of the box 4 allows for intuitive inspection of the internal oil status, and the inside of the oil tank can be cleaned through the cleaning window during regular maintenance. When the die-casting cycle ends or the system needs to be stopped, the motor pump 11 is shut down, and the pilot-operated unloading overflow valve 14 unloads and reduces the system pressure. The throttle valve below the valve block 13 can be used for manual pressure relief during maintenance. Throughout the operation, the electrical box 19 centrally controls the level and temperature sensor 6, the motor pump 11, and the pressure transmitter 15 to achieve fault alarms and automatic protection. When the liquid level is too low or the filter is clogged, the system alarms and may stop operation to ensure safety.

[0037] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A high-speed opening and closing hydraulic system based on a die-casting vacuum system, comprising a hydraulic assembly (1) and a solenoid valve group (2), characterized in that, The solenoid valve assembly (2) is fixed at the die-casting machine position. The hydraulic component (1) is connected to the solenoid valve assembly (2) through a pipe. The hydraulic component (1) includes two profile frames (3). A housing (4) is bolted between the two profile frames (3). A plate-type water-cooled module (12) is bolted to the outer wall of one side of the housing (4), and the heat-conducting structure of the plate-type water-cooled module (12) extends into the housing (4). A motor pump assembly (11) is bolted to one side of the top of the housing (4). A return oil filter (18), a liquid level temperature sensor (6), and an air filter (5) are bolted to one side of the top of the housing (4). A valve block (13) is bolted to one side of the top of the housing (4), and the valve block (18) is bolted to the other side of the top of the housing (4). 3) It is connected to the housing (4). A pressure transmitter (15) is threaded on one side of the outer wall of the valve block (13). A threaded adapter (16) is threaded on the other side of the outer wall of the valve block (13). A hydraulic pipe connector (17) is threaded on one end of the threaded adapter (16). A pilot-operated unloading relief valve (14) is bolted on the top of the valve block (13). A level gauge (20) is bolted on one side of the outer wall of the housing (4). An oil port welding joint (7) is welded on one side of the outer wall of the housing (4). A connecting elbow (8) is threaded on one end of the oil port welding joint (7). A union (9) is threaded on one end of the connecting elbow (8). A ball valve (10) is threaded on one end of the union (9).

2. The ultra-high-speed opening and closing hydraulic system for a die-casting vacuum system according to claim 1, characterized in that, The top side of the box (4) is provided with an oil inlet, the outer wall of the box (4) is provided with an oil outlet, a window (22) is bolted to the outer wall of the box (4), and a nameplate (21) is bolted to the outer wall of the other side of the box (4).

3. The ultra-high-speed opening and closing hydraulic system for a die-casting vacuum system according to claim 1, characterized in that, One of the profile frames (3) has an electrical box (19) bolted on one side of its outer wall, and the electrical box (19) is electrically connected to the liquid level temperature sensor (6), the motor pump group (11), and the pressure transmitter (15) respectively through wires.

4. The ultra-high-speed opening and closing hydraulic system for a die-casting vacuum system according to claim 1, characterized in that, The solenoid valve assembly (2) includes a support frame (23), on which a mounting block (24) is bolted, and an overflow safety valve (28) is threaded onto the top of the mounting block (24).

5. The ultra-high-speed opening and closing hydraulic system for a die-casting vacuum system according to claim 4, characterized in that, An electromagnetic directional valve (25) is bolted to one side of the outer wall of the mounting valve block (24), and an electromagnetic ball valve (26) and an electromagnetic ball valve (27) are threaded to one side of the outer wall of the mounting valve block (24).

6. The ultra-high-speed opening and closing hydraulic system for a die-casting vacuum system according to claim 1, characterized in that, The return oil filter (18) is equipped with a blockage transmitter, and the pressure setting method of the pilot-operated unloading relief valve (14) is clockwise rotation to increase pressure and counterclockwise rotation to decrease pressure.

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