Portable nitrogen charging oil cylinder cooling scheme

Abstract

According to the portable nitrogen charging oil cylinder cooling scheme, a nitrogen charging vehicle, a nitrogen cylinder, an energy accumulator and an oil tank are included, the nitrogen cylinder, the energy accumulator and the oil tank are all communicated with the nitrogen charging vehicle, and a first nitrogen charging oil cylinder and a second nitrogen charging oil cylinder which are communicated with the energy accumulator and the nitrogen cylinder at the same time are arranged in the nitrogen charging vehicle; a one-way control unit used for conducting the first nitrogen charging oil cylinder and the second nitrogen charging oil cylinder in a one-way mode is arranged in the nitrogen charging vehicle, a reversing valve used for switching the first nitrogen charging oil cylinder and the second nitrogen charging oil cylinder is further arranged in the nitrogen charging vehicle, and the reversing valve is connected with an oil source used for controlling the reversing valve. Compared with the prior art, main engine oil is used for oil return cooling, the reversing valve is communicated with the first nitrogen charging oil cylinder and the second nitrogen charging oil cylinder so as to switch use of the first nitrogen charging oil cylinder and the second nitrogen charging oil cylinder, and heat accumulation caused by long-time use of the same nitrogen charging oil cylinder is prevented; and the nitrogen charging oil cylinder in the standby state is naturally cooled, so that the cooling effect on the first nitrogen charging oil cylinder and the second nitrogen charging oil cylinder is guaranteed, an external pressure water source is not needed, energy conservation and environmental protection are achieved, and use is more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of nitrogen filling equipment, in particular to a convenient nitrogen filling oil cylinder cooling solution. Background Art

[0002] High-pressure casting is to inject liquid or semi-solid metal into the mold cavity at high pressure and speed, and finally solidify it by cooling under pressure. In order to ensure the injection speed during high-pressure casting, an accumulator needs to be added to the die-casting machine oil pump motor to increase the injection oil flow. In order to improve the nitrogen charging efficiency, a nitrogen charging trolley is currently configured to charge the die-casting machine accumulator with nitrogen. During the nitrogen charging process, the oil in the nitrogen charging trolley generates a certain amount of heat through the valve port and pipeline, and the nitrogen also generates a lot of heat during the compression process. Therefore, the nitrogen charging trolley needs to be specially cooled.

[0003] Chinese patent application number 201820760554.5 discloses a nitrogen charging device for a die-casting machine. The nitrogen charging device disclosed above comprises a base plate and an outer cover arranged above the base plate, wherein a nitrogen charging cylinder and an oil inlet pipe, a nitrogen inlet pipe and a nitrogen outlet pipe connected to the nitrogen charging cylinder are arranged inside the outer cover, a piston is arranged inside the nitrogen charging cylinder, and the piston separates the nitrogen charging cylinder into a pneumatic chamber and a hydraulic chamber, one end of the oil inlet pipe is connected to the hydraulic chamber, and the other end of the oil inlet pipe is connected to the hydraulic system, one end of the nitrogen inlet pipe is connected to the pneumatic chamber, and the other end of the nitrogen inlet pipe is connected to a nitrogen source, one end of the nitrogen outlet pipe is connected to the pneumatic chamber, and one end of the nitrogen outlet pipe is connected to an accumulator. Chinese patent application number 202020364034.X discloses an accumulator nitrogen charging structure that does not require an external nitrogen charging device. The above-mentioned accumulator nitrogen charging structure includes a piston accumulator, an auxiliary gas cylinder, and a nitrogen cylinder. The auxiliary gas cylinder merges with the upper end of the piston accumulator to form a merging end. A first stop valve and a first one-way valve in parallel are provided between the merging end and the auxiliary gas cylinder. The merging end is connected to a second one-way valve, and the nitrogen cylinder is connected to a second stop valve. The nitrogen cylinder and the merging end are sealed and connected via a pipe joint; the charging pipeline includes an oil pump motor, a storage pilot valve, a shuttle valve, and a storage valve; the piston accumulator is connected to an accumulator unloading valve, and the other end of the accumulator unloading valve is connected to the oil tank.

[0004] Heat dissipation of the nitrogen filling cylinder is a key problem that needs to be solved during the operation of the nitrogen filling trolley. In the above-mentioned prior art, the nitrogen filling trolley generally adopts the method of cooling by passing water through the outer shell water tank of the nitrogen filling piston. This method requires a special water source and power. Each time nitrogen filling needs to prepare the connection between the pressure water source and the water inlet, the conditions are harsh, time-consuming and labor-intensive. Utility Model Content

[0005] The utility model aims to overcome the defects in the prior art and provides a convenient nitrogen-filled oil cylinder cooling solution without the need for an external pressure water source.

[0006] In order to achieve the above-mentioned purpose of the utility model, the utility model adopts the following technical scheme: a portable nitrogen-filling cylinder cooling scheme, including a nitrogen-filling vehicle and a nitrogen cylinder, an accumulator, and a fuel tank all connected to the nitrogen-filling vehicle, wherein the nitrogen-filling vehicle is provided with a first nitrogen-filling cylinder and a second nitrogen-filling cylinder which are simultaneously connected to the accumulator and the nitrogen cylinder; the nitrogen-filling vehicle is provided with a one-way control unit for unidirectionally conducting the first nitrogen-filling cylinder and the second nitrogen-filling cylinder to the accumulator, and the nitrogen cylinder to the first nitrogen-filling cylinder and the second nitrogen-filling cylinder; the nitrogen-filling vehicle is also provided with a reversing valve for switching the first nitrogen-filling cylinder and the second nitrogen-filling cylinder, and the reversing valve is connected to an oil source for controlling the reversing valve.

[0007] As a preferred solution of the utility model, the first nitrogen-charging cylinder includes a first lower chamber, a first upper chamber and a first external cooling jacket, the second nitrogen-charging cylinder includes a second lower chamber, a second upper chamber and a second external cooling jacket, and the one-way control unit is arranged at the first upper chamber and the second upper chamber.

[0008] As a preferred solution of the utility model, the reversing valve includes a T port, a P port, an A port and a B port, the T port is connected to the lower end interface of the first external cooling sleeve and the lower end interface of the second external cooling sleeve, the P port is connected to the oil source, the A port is connected to the first lower chamber, and the B port is connected to the second lower chamber.

[0009] As a preferred solution of the utility model, an oil inlet quick plug for connecting the P port and the oil source is provided between the P port of the reversing valve and the oil source.

[0010] As a preferred solution of the utility model, the first upper cavity and the second upper cavity are connected to the accumulator, and the upper end interface of the first external cooling sleeve and the upper end interface of the second external cooling sleeve are both connected to the oil tank.

[0011] As a preferred solution of the present utility model, the first upper chamber and the second upper chamber are connected to the nitrogen bottle.

[0012] As a preferred solution of the utility model, the one-way control unit includes an inflation one-way valve and an air intake one-way valve, and the inflation one-way valve is arranged between the first upper chamber and the accumulator and between the second upper chamber and the accumulator.

[0013] As a preferred solution of the utility model, the air intake one-way valve is arranged between the first upper chamber and the nitrogen bottle and between the second upper chamber and the nitrogen bottle.

[0014] As a preferred solution of the utility model, an oil return one-way valve and an oil return quick connector are provided between the upper end interface of the first external cooling sleeve, the upper end interface of the second external cooling sleeve and the oil tank.

[0015] As a preferred solution of the utility model, a pipeline for communication is provided between the nitrogen charging vehicle and the accumulator, the nitrogen cylinder and the oil tank.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. By connecting the reversing valve with the first nitrogen-filling cylinder and the second nitrogen-filling cylinder, the use of the first nitrogen-filling cylinder and the second nitrogen-filling cylinder is switched to prevent heat accumulation caused by long-term use of the same nitrogen-filling cylinder, and the nitrogen-filling cylinder in the standby state is naturally cooled, thereby ensuring the cooling effect of the first nitrogen-filling cylinder and the second nitrogen-filling cylinder, and no external pressure water source is required, which is not only energy-saving and environmentally friendly, but also more convenient to use;

[0018] 2. Furthermore, by connecting the T-port of the reversing valve with the first external cooling jacket and the second external cooling jacket, the cooling effect on the first nitrogen-filled oil cylinder and the second nitrogen-filled oil cylinder is ensured. In addition, the return oil one-way valve can prevent the oil in the oil tank from flowing out in the disconnected state. At the same time, it can also prevent the accidental operation of opening the return oil quick connector during work, so that the high-pressure oil is trapped in the first external cooling jacket and the second external cooling jacket, thereby damaging the cooling jacket. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the utility model;

[0020] Figure 2 It is a structural schematic diagram of the nitrogen filling vehicle of the utility model;

[0021] Figure 3 This is the principle diagram of the utility model

[0022] Figure numerals: nitrogen charging vehicle 1, first nitrogen charging cylinder 101, first lower chamber 1011, first upper chamber 1012, first external cooling jacket 1013, second nitrogen charging cylinder 102, second lower chamber 1021, second upper chamber 1022, second external cooling jacket 1023, reversing valve 103, T port 1031, P port 1032, A port 1033, B port 1034, air intake check valve 104, charging check valve 105, oil return check valve 106, accumulator 2, nitrogen bottle 3, oil tank 4, pipeline 5, oil source 6, one-way control unit 7, oil inlet quick plug 8, oil return quick connector 9. DETAILED DESCRIPTION

[0023] The embodiments of the utility model are described in detail below with reference to the accompanying drawings.

[0024] like Figure 1-Figure 3As shown, a convenient nitrogen-filling oil cylinder cooling solution comprises a nitrogen-filling vehicle 1 and a nitrogen bottle 3, an accumulator 2 and an oil tank 4 which are all connected to the nitrogen-filling vehicle 1. The nitrogen-filling vehicle 1 is provided with a first nitrogen-filling oil cylinder 101 and a second nitrogen-filling oil cylinder 102 which are simultaneously connected to the accumulator 2 and the nitrogen bottle 3. The nitrogen-filling vehicle 1 is provided with a one-way control unit 7 for one-way conduction from the first nitrogen-filling oil cylinder (101) and the second nitrogen-filling oil cylinder (102) to the accumulator (2), and from the nitrogen bottle (3) to the first nitrogen-filling oil cylinder (101) and the second nitrogen-filling oil cylinder (102). The nitrogen-filling vehicle 1 is also provided with a reversing valve 103 for switching between the first nitrogen-filling oil cylinder 101 and the second nitrogen-filling oil cylinder 102, and the reversing valve 103 is connected to an oil source 6 for controlling the reversing valve 103.

[0025] Furthermore, multiple nitrogen cylinders 3 can be provided, and multiple nitrogen cylinders 3 can be connected simultaneously according to actual needs. It is only necessary to connect multiple nitrogen cylinders 3 with bottle mouth one-way valves in parallel in front of the one-way control unit 7. The first nitrogen filling cylinder 101 and the second nitrogen filling cylinder 102 are arranged in parallel in the nitrogen filling vehicle 1, the reversing valve 103 is located at the bottom of the nitrogen filling vehicle 1, and the oil source 6 is located in the injection valve plate of the die-casting machine, and high-pressure oil is provided through the injection valve plate; in addition, through the one-way control unit 7, one-way conduction between the first nitrogen filling cylinder 101 and the second nitrogen filling cylinder 102 and the accumulator 2 and the nitrogen cylinder 3 can be achieved, thereby avoiding backflow.

[0026] The first nitrogen-charging cylinder 101 includes a first lower chamber 1011, a first upper chamber 1012 and a first external cooling sleeve 1013, the second nitrogen-charging cylinder 102 includes a second lower chamber 1021, a second upper chamber 1022 and a second external cooling sleeve 1023, the one-way control unit 7 is arranged at the first upper chamber 1012 and the second upper chamber 1022, further, a piston is slidably connected between the first lower chamber 1011 and the first upper chamber 1012, a piston is also slidably connected between the second lower chamber 1021 and the second upper chamber 1022, and the one-way control unit 7 is connected to the first upper chamber 1012 and the second upper chamber 1022.

[0027] The reversing valve 103 includes a T port 1031, a P port 1032, an A port 1033 and a B port 1034. The T port 1031 is connected to the lower end interface of the first external cooling sleeve 1013 and the lower end interface of the second external cooling sleeve 1023. The P port 1032 is connected to the oil source 6. The A port 1033 is connected to the first lower chamber 1011. The B port 1034 is connected to the second lower chamber 1021.

[0028] An oil inlet quick plug 8 for connecting the P port 1032 and the oil source 6 is provided between the P port 1032 of the reversing valve 103 and the oil source 6. Furthermore, the oil inlet quick plug 8 is a two-way switch type, including a male connector connected to the oil source 6 and a female connector connected to the P port 1032 of the reversing valve 103. When not connected, both the male and female connectors have an automatic closing function. After the male and female connectors are connected, the oil can flow freely.

[0029] The first upper chamber 1012 and the second upper chamber 1022 are connected to the accumulator 2 , and the upper end interface of the first external cooling jacket 1013 and the upper end interface of the second external cooling jacket 1023 are both connected to the oil tank 4 .

[0030] The first upper chamber 1012 and the second upper chamber 1022 are in communication with the nitrogen cylinder 3 .

[0031] The one-way control unit 7 includes a charging one-way valve 105 and an intake one-way valve 104 . The charging one-way valve 105 is arranged between the first upper chamber 1012 and the accumulator 2 and between the second upper chamber 1022 and the accumulator 2 .

[0032] The air intake check valve 104 is arranged between the nitrogen bottle 3 and the first upper chamber 1012 and between the nitrogen bottle 3 and the second upper chamber 1022 .

[0033] An oil return check valve 106 and an oil return quick connector 9 are provided between the upper end interface of the first external cooling sleeve 1013 and the upper end interface of the second external cooling sleeve 1023 and the oil tank 4. Furthermore, the oil return quick connector 9 is a single-way switch type quick connector, including a male connector connected to the oil tank 4 and a female connector connected to the upper end interface of the first external cooling sleeve 1013 and the upper end interface of the second external cooling sleeve 1023. When not connected, the male connector has an automatic closing function, which can prevent the oil in the oil tank 4 from flowing out. The female connector is in a normally open state, but a spring-loaded oil return check valve 106 is installed in front of the female connector. Therefore, in the disconnected state, it can also prevent the low-pressure oil in the upper end interface of the first external cooling sleeve 1013 and the upper end interface of the second external cooling sleeve 1023 from flowing out. After the male and female connectors are connected, the oil can flow freely.

[0034] A pipeline 5 for communication is provided between the nitrogen charging vehicle 1 and the accumulator 2 , the nitrogen cylinder 3 and the oil tank 4 .

[0035] In actual use, Example 1:

[0036] The oil source 6 provides oil of a certain pressure and flow rate, which enters the P port 1032 of the reversing valve 103 through the oil inlet quick plug 8, the left electromagnet of the reversing valve 103 is energized, the reversing valve 103 is in the left position, the second lower chamber 1021 of the second nitrogen-charging cylinder 102 is filled with oil, the piston moves upward, and the nitrogen above the piston is pressed into the accumulator 2 through the charging check valve 105; since the lower end interface of the first external cooling sleeve 1013 of the first nitrogen-charging cylinder 101 is connected to the T port 1031 of the reversing valve 103, the upper end interface of the first external cooling sleeve 1013 It is connected to the oil tank 4 through the return oil check valve 106 and the return oil quick connector 9. Under the pressure of the nitrogen in the nitrogen bottle 3, the intake check valve 104 opens, and the nitrogen in the nitrogen bottle 3 enters the first upper chamber 1012 of the first nitrogen-charging cylinder 101 through the intake check valve 104. The piston in the first nitrogen-charging cylinder 101 moves downward under the nitrogen pressure, and the hydraulic oil in the first lower chamber 1011 of the first nitrogen-charging cylinder 101 passes through the reversing valve 103 and enters the first external cooling jacket 1013 of the first nitrogen-charging cylinder 101 to cool the first nitrogen-charging cylinder 101. The electromagnet on the right side of the reversing valve 103 is energized, the reversing valve 103 is in the right position, the first lower chamber 1011 of the first nitrogen-charging cylinder 101 is filled with oil, the piston moves upward, and the nitrogen above the piston is pressed into the accumulator 2 through the charging check valve 105; since the upper end interface of the second external cooling jacket 1023 of the second nitrogen-charging cylinder 102 is connected to the oil tank 4, under the pressure of the nitrogen in the nitrogen bottle 3, the intake check valve 104 is opened, and the nitrogen in the nitrogen bottle 3 enters the second upper chamber 1022 of the second nitrogen-charging cylinder 102 through the intake check valve 104, and the piston of the second nitrogen-charging cylinder 102 moves downward under the nitrogen pressure, and the hydraulic oil in the second lower chamber 1021 of the second nitrogen-charging cylinder 102 passes through the reversing valve 103 and enters the second external cooling jacket 102 of the second nitrogen-charging cylinder 102 to cool the second nitrogen-charging cylinder 102.

[0037] In addition, the nitrogen charging vehicle 1 is not designed with a power source, and uses the oil tank and oil pump motor of the die-casting machine host as the oil source 6 and power source. Compared with the flow required by the nitrogen charging vehicle 1, the die-casting machine host oil tank has a larger capacity, and the host itself has a larger power cooling system. During the nitrogen charging process, the pressure oil flow provided by the host can be guaranteed to be at a lower temperature. Therefore, it can ensure that the nitrogen charging cylinder of the nitrogen charging vehicle 1 has a better cooling effect, thereby ensuring the stable operation of the nitrogen charging vehicle 1.

[0038] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention; therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

[0039] Although the present invention uses the following terms more frequently: nitrogen charging vehicle 1, first nitrogen charging oil cylinder 101, first lower chamber 1011, first upper chamber 1012, first external cooling jacket 1013, second nitrogen charging oil cylinder 102, second lower chamber 1021, second upper chamber 1022, second external cooling jacket 1023, reversing valve 103, T port 1031, P port 1032, A port 1033, B port 1034, air intake check valve 104, air charging check valve 105, oil return check valve 106, accumulator 2, nitrogen cylinder 3, oil tank 4, pipeline 5, oil source 6, one-way control unit 7, oil intake quick plug 8, oil return quick connector 9, etc., the possibility of using other terms is not excluded. The use of these terms is only for the purpose of more conveniently describing and explaining the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.

Claims

1. A portable nitrogen-filled oil cylinder cooling solution, comprising a nitrogen-filling vehicle (1), a nitrogen bottle (3), an accumulator (2), and an oil tank (4) all connected to the nitrogen-filling vehicle (1), characterized in that: The nitrogen charging vehicle (1) is provided with a first nitrogen charging cylinder (101) and a second nitrogen charging cylinder (102) which are simultaneously connected to the accumulator (2) and the nitrogen bottle (3); the nitrogen charging vehicle (1) is provided with a one-way control unit (7) for one-way communication between the first nitrogen charging cylinder (101) and the second nitrogen charging cylinder (102) and the accumulator (2), and between the nitrogen bottle (3) and the first nitrogen charging cylinder (101) and the second nitrogen charging cylinder (102); the nitrogen charging vehicle (1) is also provided with a reversing valve (103) for switching between the first nitrogen charging cylinder (101) and the second nitrogen charging cylinder (102), and the reversing valve (103) is connected to an oil source (6) for controlling the reversing valve (103).

2. A portable nitrogen-filled oil cylinder cooling solution according to claim 1, characterized in that: The first nitrogen-charging cylinder (101) comprises a first lower chamber (1011), a first upper chamber (1012) and a first external cooling jacket (1013); the second nitrogen-charging cylinder (102) comprises a second lower chamber (1021), a second upper chamber (1022) and a second external cooling jacket (1023); and a one-way control unit (7) is arranged at the first upper chamber (1012) and the second upper chamber (1022).

3. A portable nitrogen-filled oil cylinder cooling solution according to claim 2, characterized in that: The reversing valve (103) comprises a T port (1031), a P port (1032), an A port (1033) and a B port (1034); the T port (1031) is connected to a lower end interface of the first external cooling jacket (1013) and a lower end interface of the second external cooling jacket (1023); the P port (1032) is connected to an oil source (6); the A port (1033) is connected to a first lower chamber (1011); and the B port (1034) is connected to a second lower chamber (1021).

4. A portable nitrogen-filled oil cylinder cooling solution according to claim 3, characterized in that: An oil inlet quick plug (8) for connecting the P port (1032) and the oil source (6) is provided between the P port (1032) of the reversing valve (103) and the oil source (6).

5. A portable nitrogen-filled oil cylinder cooling solution according to claim 2, characterized in that: The first upper chamber (1012) and the second upper chamber (1022) are in communication with the accumulator (2), and the upper end interface of the first external cooling jacket (1013) and the upper end interface of the second external cooling jacket (1023) are both in communication with the oil tank (4).

6. A portable nitrogen-filled oil cylinder cooling solution according to claim 2, characterized in that: The first upper chamber (1012) and the second upper chamber (1022) are in communication with the nitrogen bottle (3).

7. A portable nitrogen-filled oil cylinder cooling solution according to claim 2, characterized in that: The one-way control unit (7) comprises an air charging one-way valve (105) and an air intake one-way valve (104); the air charging one-way valve (105) is arranged between the first upper chamber (1012) and the accumulator (2) and between the second upper chamber (1022) and the accumulator (2).

8. A portable nitrogen-filled oil cylinder cooling solution according to claim 7, characterized in that: The air intake check valve (104) is arranged between the first upper chamber (1012) and the nitrogen bottle (3) and between the second upper chamber (1022) and the nitrogen bottle (3).

9. A portable nitrogen-filled oil cylinder cooling solution according to claim 2, characterized in that: An oil return one-way valve (106) and an oil return quick connector (9) are provided between the upper end interface of the first external cooling jacket (1013), the upper end interface of the second external cooling jacket (1023) and the oil tank (4).

10. A portable nitrogen-filled oil cylinder cooling solution according to claim 1, characterized in that: A pipeline (5) for communication is provided between the nitrogen charging vehicle (1), the accumulator (2), the nitrogen cylinder (3) and the oil tank (4).

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