Energy storage device of die casting machine capable of switching between high pressure and low pressure

Abstract

The utility model discloses a kind of energy storage devices of die casting machine with high-low voltage switching, including energy accumulator, and the energy accumulator is connected with conducting unit, and the conducting unit is connected with gas delivery pipe, and the gas delivery pipe is connected with gas delivery unit, and the gas delivery pipe includes low-pressure connecting pipe and high-pressure connecting pipe, and the gas delivery unit includes high-pressure unit and low-pressure unit, and the high-pressure unit is connected high-pressure connecting pipe, and the low-pressure unit is connected low-pressure connecting pipe, and on-off control valve is provided on the gas delivery pipe, and the conducting unit can be connected low-pressure connecting pipe and high-pressure connecting pipe.The utility model provides a kind of energy storage devices of die casting machine with high-low voltage switching, can be according to the actual demand of production, by controlling on-off control valve on high-pressure unit and low-pressure unit, to carry out the quick switching of high-low voltage, improve production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of energy storage technology, and in particular to an energy storage device for a die-casting machine that can switch between high and low pressure. Background Technology

[0002] When die-casting machines have significantly different requirements for dynamic injection force, the only current method to adjust the nitrogen pressure in the accumulator is by filling or releasing nitrogen, thereby changing the pressure range of the energy storage. This is because current die-casting machines generally consist of only one accumulator and nitrogen cylinder combination.

[0003] For example, publication number "CN218775632U" discloses "a pin extrusion device and a die-casting machine," including a hydraulic accumulator, an oil pump motor, a pin cylinder, a pin, a first hydraulic valve, and a second hydraulic valve. The receiving end of the hydraulic accumulator is connected to the supply end of the oil pump motor, and the supply end of the hydraulic accumulator is connected to the rodless chamber of the pin cylinder. The first hydraulic valve is located between the receiving end of the hydraulic accumulator and the supply end of the oil pump motor, opening and closing the connection between the receiving end of the hydraulic accumulator and the supply end of the oil pump motor. The second hydraulic valve is located between the supply end of the hydraulic accumulator and the rodless chamber of the pin cylinder, opening and closing the connection between the supply end of the hydraulic accumulator and the rodless chamber of the pin cylinder. However, in practical applications, this type of accumulator cannot quickly switch between high and low pressure, requiring real-time adjustments, resulting in low production efficiency. Summary of the Invention

[0004] In view of the problem mentioned in the background art that the existing technology cannot quickly switch between high and low pressure, this utility model provides a die-casting machine energy storage device that can switch between high and low pressure. It can quickly switch between high and low pressure according to the actual production needs by controlling the on-off control valves on the high-pressure unit and the low-pressure unit, thereby improving production efficiency.

[0005] To achieve the above objectives, the present invention adopts the following technical solution.

[0006] A high-low pressure switching energy storage device for a die-casting machine includes an accumulator, a connecting unit connected to the accumulator, a gas supply pipe connected to the connecting unit, and a gas supply unit connected to the gas supply pipe. The gas supply pipe includes a low-pressure connecting pipe and a high-pressure connecting pipe, and the gas supply unit includes a high-pressure unit and a low-pressure unit. The high-pressure unit is connected to the high-pressure connecting pipe, and the low-pressure unit is connected to the low-pressure connecting pipe. An on / off control valve is installed on the gas supply pipe, and the connecting unit can connect the low-pressure connecting pipe and the high-pressure connecting pipe. In existing technology, accumulators are generally connected to only one gas supply unit, and the gas pressure inside the gas supply unit is adjusted during use. Especially when the dynamic injection force requirements of the die-casting machine vary greatly, currently, the nitrogen pressure of the accumulator can only be adjusted by filling or releasing nitrogen, thereby changing the pressure range of energy storage. When the dynamic injection force needs to be adjusted during production, a disconnection operation between the accumulator and the gas delivery unit is required before the gas delivery unit is refilled, which reduces production efficiency. To address this issue, this application uses two gas delivery units: a high-pressure unit and a low-pressure unit. The high-pressure unit is filled with high-pressure nitrogen, while the low-pressure unit is filled with lower-pressure nitrogen. Furthermore, a high-pressure connecting pipe and a low-pressure connecting pipe are connected to the high-pressure unit and the low-pressure unit, respectively. This allows nitrogen from the high-pressure and low-pressure units to be supplied to the conduction unit via the gas delivery pipes. The conduction unit can simultaneously connect the low-pressure connecting pipe, the high-pressure connecting pipe, and the accumulator, enabling two-way communication between them. On / off control valves are installed on both the high-pressure and low-pressure connecting pipes to control the connection between the gas delivery pipes and the gas delivery unit. For example, when the high-pressure unit needs to supply gas to the accumulator, the on / off control valve on the high-pressure connecting pipe is opened. The high-pressure unit's nitrogen gas is partially introduced into the low-pressure unit's connecting pipe by opening the on / off control valve on the high-pressure unit, but not into the low-pressure unit itself. Most of the gas is channeled into the accumulator through the on / off control valve, charging the accumulator. When a lower dynamic injection force is required, the on / off control valve on the high-pressure unit remains open. A suitable accumulator pressure is first set for slow energy storage. When the accumulator piston reaches the top, most of the nitrogen gas is forced back into the high-pressure unit. Then, the on / off control valve on the high-pressure unit is closed, and the on / off control valve on the low-pressure unit is opened, connecting the low-pressure unit to the accumulator. At this point, a relatively low accumulator pressure can be set for energy storage. This device structure enables rapid switching between low-pressure and high-pressure energy storage requirements and allows for subsequent recycling, reducing adjustment steps during operation and improving production efficiency.

[0007] Preferably, the low-pressure unit and the high-pressure unit are equipped with inflation valves at their bottoms. These inflation valves facilitate inflation of the low-pressure unit and the high-pressure unit.

[0008] Preferably, the gas delivery unit includes a gas collecting plate and several gas cylinders, all of which are connected to the same gas collecting plate. Both the high-pressure unit and the low-pressure unit are equipped with gas collecting plates, and the gas delivery pipes are connected to the gas collecting plates. By connecting all the gas cylinders to the same gas collecting plate, and the gas collecting plate being connected to the gas delivery pipes, the gas inside each gas cylinder is delivered to the gas delivery pipes through the gas collecting plate, ensuring that the gas delivery unit has a large gas delivery capacity.

[0009] Preferably, several gas delivery pipes are provided, and each gas delivery pipe is equipped with an on / off control valve. Having multiple gas delivery pipes ensures that each pipe delivers gas evenly within its unit, reducing the gas volume delivered by each pipe and thus ensuring gas delivery stability. It also reduces noise generated during gas delivery. Furthermore, the on / off control valve on each gas delivery pipe opens synchronously during gas delivery, ensuring uniform gas delivery across all pipes.

[0010] Preferably, the gas pipelines are arranged side by side, and the on / off control valves on adjacent gas pipelines are staggered. Arranging the gas pipelines side by side facilitates installation, while staggering the on / off control valves on adjacent gas pipelines avoids interference between the valves and improves the rationality of the spatial layout.

[0011] Preferably, the gas delivery unit includes a fixing component, which includes a frame. The gas delivery unit includes a plurality of gas cylinders, and the fixing component includes a support base mounted on the frame. A strap is connected to the support base, and the strap wraps around the gas cylinders and connects to the support base. The gas delivery unit includes a fixing component that can fix and limit the position of the gas cylinders. Specifically, the fixing component includes a frame and a support base, wherein the support base is fixed to the frame, and a strap is provided on the support base. The strap wraps around the gas cylinders, thereby fixing the gas cylinders to the support base and ensuring the connection stability of each gas cylinder.

[0012] Preferably, the support base is provided with an arc-shaped groove that fits snugly against the gas cylinder. The arc-shaped groove on the support base adapts to the shape of the gas cylinder, ensuring a tight fit between the two, thus achieving connection stability in conjunction with the straps.

[0013] Preferably, the gas cylinders in both the high-pressure and low-pressure units are located within the same frame. Since the high-pressure and low-pressure units are already connected to their respective gas collecting plates and gas delivery pipes, placing all the gas cylinders within the same fixture saves installation costs and allows the frame to be a single, integrated structure, ensuring stability.

[0014] Preferably, a pressure sensor is connected to the gas supply pipe. The pressure sensor on the gas supply pipe allows for monitoring of the gas pressure during operation, enhancing feedback.

[0015] Preferably, a gas safety valve is connected to the conduction unit. The gas safety valve improves the safety of the device during operation.

[0016] The beneficial effects of this utility model are as follows:

[0017] (1) By connecting the high-voltage unit and the low-voltage unit, the energy storage requirements of quickly switching between low-voltage and high-voltage can be met, and subsequent recycling can be carried out, reducing the adjustment steps in the working process and improving production efficiency.

[0018] (2) By setting up multiple gas cylinders and multiple gas pipes, it is possible to ensure sufficient gas supply, while ensuring the uniformity and stability of gas supply and reducing noise during the gas supply process. Attached Figure Description

[0019] Figure 1 This is an isometric drawing of this utility model.

[0020] Figure 2 This is a schematic diagram of the present invention.

[0021] Figure 3 This is an isometric view of Example 2.

[0022] Figure 4 yes Figure 3 A magnified view of a portion of point A in the middle.

[0023] In the picture:

[0024] 1. Accumulator;

[0025] 2 conduction units, 21 gas safety valves;

[0026] 3. Gas supply pipe; 31. Low-pressure connection pipe; 32. High-pressure connection pipe; 33. On / off control valve; 34. Pressure sensor.

[0027] 4. Gas delivery unit, 41. High-pressure unit, 42. Low-pressure unit, 43. Gas filling valve, 44. Gas cylinder, 45. Gas collection plate;

[0028] 51 Frame, 52 Support base, 53 Straps, 54 Arc groove;

[0029] 61 Energy storage solenoid directional valve, 62 Energy storage cartridge valve, 63 Check valve, 64 Energy storage side pressure sensor, 65 Pressure relief solenoid directional valve, 66 Pressure relief cartridge valve;

[0030] P1 is the system pressure, and P2 is the accumulator output pressure. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0032] Example 1:

[0033] like Figure 1 , 2As shown, a high-low pressure switching energy storage device for a die-casting machine includes an accumulator 1, a connecting unit 2 connected to the accumulator 1, a gas supply pipe 3 connected to the connecting unit 2, and a gas supply unit 4 connected to the gas supply pipe 3. The gas supply pipe 3 includes a low-pressure connecting pipe 31 and a high-pressure connecting pipe 32. The gas supply unit 4 includes a high-pressure unit 41 and a low-pressure unit 42. The high-pressure unit 41 is connected to the high-pressure connecting pipe 32, and the low-pressure unit 42 is connected to the low-pressure connecting pipe 31. An on / off control valve 33 is installed on the gas supply pipe 3. The connecting unit 2 can connect the low-pressure connecting pipe 31 and the high-pressure connecting pipe 32. In the prior art, the accumulator 1 is generally connected to only one gas supply unit 4. During use, the gas pressure inside the gas supply unit 4 is adjusted. Especially when the dynamic injection force requirements of the die-casting machine vary greatly, currently, the nitrogen pressure of the accumulator 1 can only be adjusted by filling or releasing nitrogen, thereby changing the energy storage pressure range. When the dynamic injection force needs to be adjusted during production, the energy storage unit 1 and the gas supply unit 4 need to be disconnected before the gas supply unit 4 is charged, which will reduce production efficiency. To address the aforementioned issues, this embodiment configures two gas delivery units 4: a high-pressure unit 41 and a low-pressure unit 42. The high-pressure unit 41 is filled with high-pressure nitrogen, while the low-pressure unit 42 is filled with low-pressure nitrogen. Furthermore, a high-pressure connecting pipe 32 and a low-pressure connecting pipe 31 are connected to the high-pressure unit 41 and the low-pressure unit 42, respectively. This allows the nitrogen inside the high-pressure unit 41 and the low-pressure unit 42 to be input to the conducting unit 2 via the gas delivery pipe 3. The conducting unit 2 can simultaneously conduct the low-pressure connecting pipe 31, the high-pressure connecting pipe 32, and the accumulator 1, enabling two-way communication between the three. On / off control valves 33 are installed on the high-pressure connecting pipe 32 and the low-pressure connecting pipe 31, respectively. These valves control the on / off connection between the gas delivery pipe 3 and the gas delivery unit 4. For example, when the high-pressure unit 41 needs to supply gas to the accumulator 1, the on / off control valve 33 on the high-pressure connecting pipe 32... When the on / off control valve 33 is opened, the on / off control valve 33 on the low-pressure connecting pipe 31 is closed. This allows some of the nitrogen gas inside the high-pressure unit 41 to enter the low-pressure connecting pipe 31 after passing through the conduction unit 2, but it cannot enter the low-pressure unit 42. Most of the gas is introduced into the accumulator 1 through the conduction unit 2 to charge the accumulator 1. When a lower dynamic injection force of the die-casting machine is required, the on / off control valve 33 on the high-pressure connecting pipe 32 is kept open. A suitable energy storage pressure is first set for slow energy storage. When the piston of the accumulator 1 reaches the upper end of the accumulator 1, most of the nitrogen gas in the accumulator 1 is forced back into the high-pressure unit 41. Then, the on / off control valve 33 on the high-pressure connecting pipe 32 is closed, and then the on / off control valve 33 on the low-pressure connecting pipe 31 is opened to connect the low-pressure unit 42 to the accumulator 1. At this time, a relatively low energy storage pressure can be set for energy storage.In this embodiment, the device structure described above enables rapid switching between low-voltage and high-voltage energy storage requirements, while also allowing for subsequent recycling, reducing adjustment steps during operation and improving production efficiency.

[0034] like Figure 2 As shown, inflation valves 43 are provided at the bottom of the low-pressure unit 42 and the high-pressure unit 41. The inflation valves 43 at the bottom of the low-pressure unit 42 and the high-pressure unit 41 facilitate inflation of the low-pressure unit 42 and the high-pressure unit 41.

[0035] like Figure 2 As shown, a pressure sensor 34 is connected to the gas supply pipe 3. The pressure sensor 34 on the gas supply pipe 3 can monitor the gas pressure during operation and enhance feedback.

[0036] like Figure 2 As shown, a gas safety valve 21 is connected to the conduction unit 2. By setting the gas safety valve 21, the safety of the device during operation can be improved.

[0037] like Figure 2 As shown in the figure, in this embodiment, P1 is the system pressure and P2 is the accumulator output pressure. The entire device is also equipped with an energy storage electromagnetic directional valve 61, an energy storage cartridge valve 62, a one-way valve 63, an energy storage side pressure sensor 64, a pressure relief electromagnetic directional valve 65, and a pressure relief cartridge valve 66.

[0038] In this embodiment, by connecting the high-voltage unit 41 and the low-voltage unit 42, the energy storage requirements for quickly switching between low and high voltage can be met, and subsequent recycling can be carried out, reducing the adjustment steps in the working process and improving production efficiency.

[0039] Example 2:

[0040] like Figure 3 As shown, the gas delivery unit 4 includes a gas collecting plate 45 and several gas cylinders 44. Each gas cylinder 44 is connected to the same gas collecting plate 45. Both the high-pressure unit 41 and the low-pressure unit 42 are equipped with gas collecting plates 45, and the gas delivery pipe 3 is connected to the gas collecting plate 45. By connecting each gas cylinder 44 to the same gas collecting plate 45, and the gas collecting plate 45 being connected to the gas delivery pipe 3, the gas inside each gas cylinder 44 is delivered to the gas delivery pipe 3 through the gas collecting plate 45, ensuring that the gas delivery unit 4 has a large gas delivery capacity.

[0041] like Figure 3As shown, several gas delivery pipes 3 are provided, and each gas delivery pipe is equipped with an on / off control valve 33. Having multiple gas delivery pipes 3 ensures that each gas delivery pipe 3 delivers gas evenly within the gas delivery unit 4, reducing the gas delivery volume of each gas delivery pipe 3 and thus ensuring the stability of the gas delivery process. It also reduces noise generated during gas delivery. Furthermore, the on / off control valve 33 on each gas delivery pipe 3 opens synchronously during gas delivery, ensuring uniform gas delivery in each gas delivery pipe 3.

[0042] like Figure 3 As shown, the gas pipelines 3 are arranged side by side, and the on / off control valves 33 on adjacent gas pipelines 3 are staggered. Arranging the gas pipelines 3 side by side facilitates installation, while staggering the on / off control valves 33 on adjacent gas pipelines 3 avoids interference between the on / off control valves 33 and improves the rationality of the spatial layout.

[0043] like Figure 4 As shown, the gas delivery unit 4 includes a fixing component, which includes a frame 51. The gas delivery unit 4 includes several gas cylinders 44. The fixing component includes a support base 52 mounted on the frame 51. A strap 53 is connected to the support base 52, and the strap 53 surrounds the gas cylinders 44 and is connected to the support base 52. The gas delivery unit 4 includes a fixing component that can fix and limit the position of the gas cylinders 44. Specifically, the fixing component includes a frame 51 and a support base 52, wherein the support base 52 is fixed to the frame 51, and a strap 53 is provided on the support base 52. By surrounding the gas cylinders 44 with the strap 53, the gas cylinders 44 are fixed to the support base 52, ensuring the connection stability of each gas cylinder 44.

[0044] like Figure 4 As shown, the support base 52 is provided with an arc-shaped groove 54 that fits into the gas cylinder 44. The arc-shaped groove 54 on the support base 52 can be adapted to the shape of the gas cylinder 44 to ensure a tight fit between the two, thereby achieving a stable connection with the strap 53.

[0045] like Figure 3 As shown, the gas cylinders 44 in both the high-pressure unit 41 and the low-pressure unit 42 are located within the same frame 51. Since the high-pressure unit 41 and the low-pressure unit 42 are already connected to their respective gas collecting plates 45 and gas delivery pipes 3, placing all the gas cylinders 44 within the same fixture saves installation costs and allows the frame 51 to be a single, integrated structure, ensuring stability.

[0046] In addition to the above-mentioned structural features and beneficial effects, this embodiment also includes the following structural features and beneficial effects: An accumulator 1, with a connecting unit 2 connected to it; the connecting unit 2 is connected to a gas delivery pipe 3; the gas delivery pipe 3 is connected to a gas delivery unit 4; the gas delivery pipe 3 includes a low-pressure connecting pipe 31 and a high-pressure connecting pipe 32; the gas delivery unit 4 includes a high-pressure unit 41 and a low-pressure unit 42; the high-pressure unit 41 is connected to the high-pressure connecting pipe 32; the low-pressure unit 42 is connected to the low-pressure connecting pipe 31; an on / off control valve 33 is provided on the gas delivery pipe 3; the connecting unit 2 can connect the low-pressure connecting pipe 31 and the high-pressure connecting pipe 32. A filling valve 43 is provided at the bottom of the low-pressure unit 42 and the high-pressure unit 41. Gas cylinders 44 in both the high-pressure unit 41 and the low-pressure unit 42 are located within the same frame 51. A pressure sensor 34 is connected to the gas delivery pipe 3. A gas safety valve 21 is connected to the connecting unit 2.

[0047] In existing technology, the accumulator 1 is generally connected to only one gas supply unit 4. During use, the gas pressure inside the gas supply unit 4 is adjusted. Especially when the dynamic injection force requirements of the die-casting machine vary greatly, currently the only way to adjust the nitrogen pressure of the accumulator 1 is by filling or releasing nitrogen, thereby changing the energy storage pressure range. However, when the dynamic injection force needs to be adjusted during production, a disconnection operation between the accumulator 1 and the gas supply unit 4 is required before the gas supply unit 4 is refilled, which reduces production efficiency. To address the aforementioned issues, this embodiment configures two gas delivery units 4: a high-pressure unit 41 and a low-pressure unit 42. The high-pressure unit 41 is filled with high-pressure nitrogen, while the low-pressure unit 42 is filled with low-pressure nitrogen. Furthermore, a high-pressure connecting pipe 32 and a low-pressure connecting pipe 31 are connected to the high-pressure unit 41 and the low-pressure unit 42, respectively. This allows the nitrogen inside the high-pressure unit 41 and the low-pressure unit 42 to be input to the conducting unit 2 via the gas delivery pipe 3. The conducting unit 2 can simultaneously conduct the low-pressure connecting pipe 31, the high-pressure connecting pipe 32, and the accumulator 1, enabling two-way communication between the three. On / off control valves 33 are installed on the high-pressure connecting pipe 32 and the low-pressure connecting pipe 31, respectively. These valves control the on / off connection between the gas delivery pipe 3 and the gas delivery unit 4. For example, when the high-pressure unit 41 needs to supply gas to the accumulator 1, the on / off control valve 33 on the high-pressure connecting pipe 32... When the on / off control valve 33 is opened, the on / off control valve 33 on the low-pressure connecting pipe 31 is closed. This allows some of the nitrogen gas inside the high-pressure unit 41 to enter the low-pressure connecting pipe 31 after passing through the conduction unit 2, but it cannot enter the low-pressure unit 42. Most of the gas is introduced into the accumulator 1 through the conduction unit 2 to charge the accumulator 1. When a lower dynamic injection force of the die-casting machine is required, the on / off control valve 33 on the high-pressure connecting pipe 32 is kept open. A suitable energy storage pressure is first set for slow energy storage. When the piston of the accumulator 1 reaches the upper end of the accumulator 1, most of the nitrogen gas in the accumulator 1 is forced back into the high-pressure unit 41. Then, the on / off control valve 33 on the high-pressure connecting pipe 32 is closed, and then the on / off control valve 33 on the low-pressure connecting pipe 31 is opened to connect the low-pressure unit 42 to the accumulator 1. At this time, a relatively low energy storage pressure can be set for energy storage.

[0048] In this embodiment, the device structure described above enables rapid switching between low-pressure and high-pressure energy storage requirements, while also allowing for subsequent recycling, reducing adjustment steps during operation and improving production efficiency. Inflation valves 43 are installed at the bottom of both the low-pressure unit 42 and the high-pressure unit 41, facilitating inflation. The gas cylinders 44 of both the high-pressure unit 41 and the low-pressure unit 42 are located within the same frame 51. Since the high-pressure unit 41 and the low-pressure unit 42 are already connected to their respective gas collecting plates 45 and gas delivery pipes 3, placing all gas cylinders 44 within the same fixture saves installation costs and allows the frame 51 to be a single, integrated structure, ensuring stability. A pressure sensor 34 is installed on the gas delivery pipe 3 to monitor the gas pressure during operation and enhance feedback. The gas safety valve 21 further improves the safety of the device during operation.

[0049] In this embodiment, by setting up multiple gas cylinders 44 and multiple gas pipes 3, it is possible to ensure sufficient gas supply, as well as the uniformity and stability of gas supply, and reduce noise during the gas supply process.

Claims

1. A high-low pressure switching energy storage device for a die-casting machine, characterized in that, It includes an accumulator, a connecting unit connected to the accumulator, a gas supply pipe connected to the connecting unit, a gas supply unit connected to the gas supply pipe, the gas supply pipe including a low-pressure connecting pipe and a high-pressure connecting pipe, the gas supply unit including a high-pressure unit and a low-pressure unit, the high-pressure unit connected to the high-pressure connecting pipe, the low-pressure unit connected to the low-pressure connecting pipe, an on / off control valve installed on the gas supply pipe, and the connecting unit capable of connecting the low-pressure connecting pipe and the high-pressure connecting pipe.

2. The energy storage device for a die-casting machine capable of switching between high and low pressure as described in claim 1, characterized in that, The low-pressure unit and the high-pressure unit are equipped with inflation valves at their bottoms.

3. The energy storage device for a die-casting machine capable of switching between high and low pressure as described in claim 1, characterized in that, The gas delivery unit includes a gas collecting plate and several gas cylinders. Each gas cylinder is connected to the same gas collecting plate. Both the high-pressure unit and the low-pressure unit are equipped with gas collecting plates. The gas delivery pipe is connected to the gas collecting plate.

4. The energy storage device for a die-casting machine capable of switching between high and low pressure as described in claim 1, characterized in that, There are several gas transmission pipes, and each gas transmission pipe is equipped with an on / off control valve.

5. The energy storage device for a die-casting machine capable of switching between high and low pressure as described in claim 4, characterized in that, Each of the gas pipelines is arranged side by side, and the on / off control valves on adjacent gas pipelines are staggered.

6. The energy storage device for a die-casting machine capable of switching between high and low pressure as described in claim 1, characterized in that, The gas delivery unit includes a fixing component, the fixing component includes a frame, the gas delivery unit includes a plurality of gas cylinders, the fixing component includes a support seat disposed on the frame, and a strap is connected to the support seat, the strap surrounds the gas cylinders and is connected to the support seat.

7. The energy storage device for a die-casting machine capable of switching between high and low pressure as described in claim 6, characterized in that, The support base is provided with an arc-shaped groove that fits into the gas cylinder.

8. The energy storage device for a die-casting machine capable of switching between high and low pressure as described in claim 6, characterized in that, The gas cylinders in both the high-pressure unit and the low-pressure unit are located within the same frame.

9. A high-low pressure switchable energy storage device for a die-casting machine according to any one of claims 1-8, characterized in that, A pressure sensor is connected to the gas pipeline.

10. A high-low pressure switching energy storage device for a die-casting machine according to any one of claims 1-8, characterized in that, A gas safety valve is connected to the conduction unit.

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