Novel energy storage control loop

Abstract

The utility model discloses a novel energy storage control loop which comprises an injection energy accumulator which is connected with a cartridge valve through a first branch, and is characterized in that the cartridge valve is connected with a second branch, the second branch is provided with a first bypass and a second bypass in an extending manner, the first bypass is connected with the first branch, a first one-way valve is arranged on the first bypass, and a second one-way valve is arranged on the second bypass. A second one-way valve is arranged on the second bypass. According to the novel energy storage control loop, the pressure of the cartridge valve is stable in the energy storage process, and hydraulic oil of the energy accumulator cannot leak.

Description

Technical Field

[0001] The utility model belongs to the technical field of energy accumulators, and in particular relates to a novel energy storage control circuit. Background Art

[0002] With the development of new energy vehicles, auto parts are gradually becoming integrated, which also promotes the development of the die-casting machine industry. During the production process of die-casting parts, the high-pressure system of the die-casting machine is required to complete the hydraulic pressure of the molten metal into the mold cavity for pressure-maintaining molding. Therefore, the accumulator needs to be stored by the system before the machine's injection action.

[0003] At present, the cold chamber die-casting machine mainly uses a two-way cartridge valve in the process of storing energy in the accumulator. The system pressure oil flows in from the cartridge valve port A and flows out from the port B. In the traditional energy storage circuit, only one one-way valve connected to the system pressure oil is used to provide pressure for the cartridge valve control chamber. When the system pressure changes, the accumulator is prone to unstable pressure and oil leakage.

[0004] Therefore, it is very necessary to design a device that can allow the hydraulic oil to flow normally into the accumulator through the two-way cartridge valve structure when the die-casting machine stores energy, while avoiding the generation of back pressure when the system pressure changes, effectively preventing the accumulator pressure instability and oil leakage, and optimizing the energy storage control circuit.

[0005] The prior art is an invention patent named oil pressure control circuit, and the publication number of this invention patent is CN107250623A. This invention is a kind of oil pressure control circuit, which is composed of: a pressure regulating valve for adjusting the discharge pressure of the oil pump, a pressure regulating valve for regulating the pilot pressure of the pressure regulating valve to the torque converter pressure, and an oil circuit connecting the output port of the pressure regulating valve and the oil circuit, the pressure regulating valve has an input port connected to the oil circuit via the oil circuit, a driving pressure port connected to the oil circuit via the oil circuit, a sliding column that is axially displaced according to the driving pressure input to the driving pressure port, and an output port, and the torque converter pressure is adjusted by the axial movement of the sliding column, wherein a throttling hole is set between the connecting part of the oil circuit and the connecting part of the oil circuit, and the torque converter pressure is adjusted to an appropriate pressure. This invention can be applied to the field of accumulator technology, and this invention reduces the excessive oil pressure acting on the torque converter, preventing the torque converter pressure that becomes excessive in response to the increase in pilot pressure of the pressure control valve from being supplied to the torque converter, but it is insufficient to improve the internal pressure instability and oil leakage when the system pressure changes. Summary of the invention

[0006] The utility model aims to provide a novel energy storage control circuit in which the pressure of the cartridge valve is stable during the energy storage process and the hydraulic oil of the accumulator does not leak.

[0007] The technical solution adopted by the utility model to achieve the above-mentioned purpose is:

[0008] A novel energy storage control circuit includes an injection accumulator, which is connected to a cartridge valve through a first branch, the cartridge valve is connected to a second branch, the second branch is extended to have a first bypass and a second bypass, the first bypass is connected to the first branch, the first bypass is provided with a first check valve, and the second bypass is provided with a second check valve.

[0009] During the energy storage process of the accumulator of the current cold chamber die-casting machine, the system pressure oil flows in from the A port of the cartridge valve and flows out from the B port, and there is a control chamber in the cartridge valve, wherein the first branch is connected to the B port of the cartridge valve, the second branch is connected to the control chamber of the cartridge valve, the A port of the cartridge valve is connected to the fourth branch, and the fourth branch passes the system pressure oil.

[0010] Through the design of a new type of energy storage control circuit, the second branch connected to the cartridge valve is extended to have two shunt paths, namely the first bypass and the second bypass, and the first bypass and the second bypass are respectively provided with a first check valve and a second check valve. It should be noted that the first bypass is connected to the first branch, wherein the first branch is the passage connecting the cartridge valve and the press-fit accumulator, that is, the first check valve is connected to the oil outlet of the cartridge valve; the second bypass is connected to the system pressure oil, that is, the second check valve is connected to the system pressure oil.

[0011] During the energy storage stage, the system pressure oil will flow in from the A port of the cartridge valve, enter the first branch from the B port of the cartridge valve, and then enter the injection accumulator to complete the energy storage action. In this process, in order to keep the accumulator pressure stable and the pressure oil does not leak, the control oil in the control chamber of the cartridge valve comes from the highest pressure of the system pressure oil and the pressure oil in the accumulator, and the system pressure oil and the pressure oil of the accumulator are compared through the first check valve and the second check valve. When the pressure of the accumulator is high, the pressure of the control chamber of the cartridge valve is equal to the pressure of the B port of the cartridge valve. Since the area of ​​the control chamber is larger than the area of ​​the B port, the cartridge valve remains in a closed state; when the pressure of the system pressure oil is high, the pressure of the control chamber of the cartridge valve is greater than the pressure of the B port of the cartridge valve, and the area of ​​the control chamber is larger than the area of ​​the B port, so the cartridge valve also remains in a closed state; the new energy storage control circuit ensures that the pressure of the accumulator remains stable after the energy storage is completed through the setting of the first check valve and the second check valve.

[0012] According to an embodiment of the utility model, an electromagnetic reversing valve is provided on the second branch.

[0013] According to an embodiment of the utility model, the electromagnetic reversing valve is connected to a third branch.

[0014] When the electromagnetic reversing valve loses power, the second branch is disconnected; when the electromagnetic reversing valve is powered, the second branch is connected. Through the above design, the electromagnetic reversing valve can be powered during the energy storage stage, and the second branch is connected to achieve control of the cartridge valve.

[0015] It should be noted that the third branch is connected to the fuel tank.

[0016] According to an embodiment of the utility model, it also includes an unloading valve, which is connected to the first branch through the third bypass.

[0017] When the unloading valve loses power, the unloading valve opens; when the unloading valve is energized, the unloading valve closes. Through the above design, when the unloading valve is energized in the energy storage stage, the unloading valve is closed and the third bypass is closed; when the unloading valve loses power, the pressure oil in the injection accumulator can be discharged through the third bypass. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of a new type of energy storage control circuit;

[0019] Figure 2 This is a schematic diagram of another new type of energy storage control circuit.

[0020] Figure numbers: injection accumulator 1, first branch 2, cartridge valve 3, second branch 4, first bypass 5, second bypass 6, first one-way valve 7, second one-way valve 8, solenoid reversing valve 9, third branch 10, unloading valve 11, third bypass 12, fourth branch 13, A port 14, B port 15, control chamber 16, fifth branch 17, third one-way valve 18. DETAILED DESCRIPTION

[0021] The technical solution of the utility model is further described in detail below in conjunction with specific implementation methods and drawings:

[0022] Embodiment 1:

[0023] like Figure 1 As shown, a novel energy storage control circuit includes an injection accumulator 1, which is connected to a cartridge valve 3 through a first branch 2, and the cartridge valve 3 is connected to a second branch 4. The second branch 4 is extended to have a first bypass 5 and a second bypass 6. The first bypass 5 is connected to the first branch 2, and a first non-return valve 7 is provided on the first bypass 5, and a second non-return valve 8 is provided on the second bypass 6.

[0024] When the current cold chamber die-casting machine is storing energy in the accumulator, the system pressure oil flows in from the A port 14 of the cartridge valve 3 and flows out from the B port 15 of the cartridge valve 3, and the cartridge valve 3 has a control chamber 16, wherein the first branch 2 is connected to the B port 15 of the cartridge valve 3, the second branch 4 is connected to the control chamber 16 of the cartridge valve 3, the A port 14 of the cartridge valve 3 is connected to the fourth branch 13, and the fourth branch 13 passes the system pressure oil.

[0025] Through the design of a new type of energy storage control circuit, the second branch 4 connected to the cartridge valve 3 extends with two branch paths, namely the first bypass 5 and the second bypass 6, and the first bypass 5 and the second bypass 6 are respectively provided with a first check valve 7 and a second check valve 8. It should be noted that the first bypass 5 is connected to the first branch 2, wherein the first branch 2 is the passage connecting the cartridge valve 3 and the press-fit accumulator, that is, the first check valve 7 is connected to the oil outlet of the cartridge valve 3; the second bypass 6 is connected to the system pressure oil, that is, the second check valve 8 is connected to the system pressure oil.

[0026] During the energy storage stage, the system pressure oil will flow in from the A port 14 of the cartridge valve 3, enter the first branch 2 from the B port 15 of the cartridge valve 3, and then enter the injection accumulator 1 to complete the energy storage action. In this process, in order to keep the accumulator pressure stable and the pressure oil does not leak, the control oil in the control chamber 16 of the cartridge valve 3 is derived from the highest pressure of the system pressure oil and the pressure oil in the accumulator. The system pressure oil and the pressure oil of the accumulator are compared through the first check valve 7 and the second check valve 8. When the pressure of the accumulator is high, the pressure of the control chamber 16 of the cartridge valve 3 is equal to the pressure of the B port 15 of the cartridge valve 3. Since the area of ​​the control chamber 16 is larger than the area of ​​the B port 15, the cartridge valve 3 remains in a closed state; when the pressure of the system pressure oil is high, the pressure of the control chamber 16 of the cartridge valve 3 is larger than the pressure of the B port 15 of the cartridge valve 3, and the area of ​​the control chamber 16 is larger than the area of ​​the B port 15, so the cartridge valve 3 also remains in a closed state; the new energy storage control circuit ensures that the pressure of the accumulator remains stable after the energy storage is completed through the arrangement of the first check valve 7 and the second check valve 8.

[0027] The second branch 4 is provided with an electromagnetic reversing valve 9. The electromagnetic reversing valve 9 is connected to a third branch 10.

[0028] When the electromagnetic reversing valve 9 loses power, the second branch 4 is disconnected; when the electromagnetic reversing valve 9 is energized, the second branch 4 is open. Through the above design, the electromagnetic reversing valve 9 can be energized during the energy storage stage, and the second branch 4 is open to control the cartridge valve 3.

[0029] It should be noted that the third branch 10 is connected to the fuel tank.

[0030] A novel energy storage control circuit further includes an unloading valve 11 , which is connected to the first branch 2 via a third bypass 12 .

[0031] When the unloading valve 11 loses power, the unloading valve 11 opens; when the unloading valve 11 is energized, the unloading valve 11 closes. Through the above design, when the unloading valve 11 is energized in the energy storage stage, the unloading valve 11 is closed, and the third bypass 12 is closed; when the unloading valve 11 loses power, the pressure oil in the injection accumulator 1 can be discharged through the third bypass 12.

[0032] Preferred unloading valves 11 include sliding valve type unloading valves, plug type unloading valves and balloon type unloading valves.

[0033] Embodiment 2:

[0034] like Figure 2 According to another embodiment of the utility model, a water monitoring device based on wave energy is different from Example 1 in that a fifth branch 17 extends from the middle of the first bypass 5 and is connected to the second branch 4, and a third one-way valve 18 is provided on the fifth branch 17.

[0035] The speed at which the control oil in the control chamber 16 of the cartridge valve 3 responds to the change in the oil pressure in the oil circuit is further improved.

[0036] The embodiments described above provide a detailed description of the technical solution of the utility model. It should be understood that the above is only a specific embodiment of the utility model and is not intended to limit the utility model. Any modifications, supplements or similar substitutions made within the scope of the principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A novel energy storage control circuit, comprising a cartridge valve (3), characterized in that: The cartridge valve (3) is connected to a second branch (4), the second branch (4) is extended to be provided with a first bypass (5) and a second bypass (6), the first bypass (5) is connected to the first branch (2), the first bypass (5) is provided with a first non-return valve (7), and the second bypass (6) is provided with a second non-return valve (8).

2. According to claim 1, a novel energy storage control circuit is characterized in that: The cartridge valve (3) is connected to the injection accumulator (1) via a first branch (2).

3. According to the novel energy storage control circuit of claim 1, it is characterized in that: The second branch (4) is provided with an electromagnetic reversing valve (9).

4. According to claim 3, a new type of energy storage control circuit is characterized in that: The electromagnetic reversing valve (9) is connected to a third branch (10).

5. According to claim 2, a novel energy storage control circuit is characterized in that: It also comprises an unloading valve (11), wherein the unloading valve (11) is connected to the first branch (2) via a third bypass (12).

6. According to claim 5, a novel energy storage control circuit is characterized in that: The unloading valve (11) comprises a slide valve type unloading valve, a plug type unloading valve and a balloon type unloading valve.

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