Nitrogen filling device for energy accumulator

Abstract

The utility model discloses a nitrogen filling device for an energy accumulator, and belongs to the technical field of high-pressure energy storage. The device comprises a compressed air source, an automatic reversing valve, a reciprocating pressure cylinder, a nitrogen source, an energy accumulator and air pipes for connecting all the parts, wherein the reciprocating pressure cylinder comprises a driving cylinder, a pressure cylinder, a driving piston, a pressure piston and a piston rod; the two cylinders are fixedly connected with each other through a partition plate; the two ends of the piston rod are fixedly connected with the driving piston and the pressurizing piston correspondingly. The driving piston and the pressurizing piston are slidably connected to the inner walls of the driving air cylinder and the pressurizing air cylinder correspondingly. Two air outlets of the automatic reversing valve are respectively communicated with two ends of the driving air cylinder through two parallel air distributing pipes; one-way throttle valves are arranged on the gas distribution pipes; and an air inlet and an air outlet of the pressurizing cylinder are respectively communicated with a nitrogen source and an energy accumulator through air pipes. The technical problems that an existing high-pressure energy accumulator nitrogen filling tool is large in size and weight and poor in flexibility and mobility are solved.

Description

Technical Field

[0001] This utility model relates to the field of high-voltage energy storage technology, and more specifically to a nitrogen filling device for an energy storage device. Background Technology

[0002] With the continuous upgrading and transformation of manufacturing technology, modern manufacturing enterprises require a large investment in hydraulic and lubrication equipment, equipped with high-value-added precision control components. Most of these are fully imported products, representing capital-intensive equipment in the industry. To ensure the stable operation of hydraulic equipment and reduce damage to precision control components, the system needs to be equipped with a large number of high-pressure accumulators. When the system pressure exceeds the internal pressure of the accumulator, the oil compresses the gas, converting the pressure in the oil into the internal energy of the gas. When the system pressure is lower than the internal pressure of the accumulator, the oil in the accumulator flows to the external system under the action of high-pressure gas, releasing energy.

[0003] High-pressure accumulators are commonly used for vibration damping, shock absorption, and leak repair to maintain pressure. Accumulators function in hydraulic systems by storing and releasing hydraulic fluid when needed, thus reducing pressure pulsations and shocks. Furthermore, they can be used to repair leaks and maintain pressure, ensuring stable system operation. Accumulator nitrogen pressure is typically checked annually. If the pressure is insufficient, nitrogen must be added promptly. In systems where the accumulator's nitrogen filling pressure exceeds the nitrogen cylinder's own filling pressure, a nitrogen filling device must be used. Traditional nitrogen filling tools are bulky, heavy, lack flexibility and mobility, are space-constrained, and have high operating and maintenance costs. Utility Model Content

[0004] 1. Technical problem to be solved by the utility model

[0005] To address the problems of large size, weight, and poor flexibility in existing high-pressure accumulator nitrogen filling tools, this utility model provides an accumulator nitrogen filling device. By using compressed air as a power source and through a specific pressure conversion and transmission mechanism, high-pressure nitrogen is delivered to the accumulator. It can be integrated into a single housing, thus achieving the goals of small size, easy transport, wide range of applications, and good flexibility.

[0006] 2. Technical Solution

[0007] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0008] A nitrogen filling device for an accumulator includes a compressed air source, an automatic reversing valve, a reciprocating booster cylinder, a nitrogen source, and an accumulator, as well as air pipes connecting the various components. The reciprocating booster cylinder includes a drive cylinder, a booster cylinder, a drive piston, a booster piston, and a piston rod. The drive cylinder has a larger diameter than the booster cylinder, and the two cylinders are fixedly connected by a partition. The two ends of the piston rod are fixedly connected to the drive piston and the booster piston, respectively, and the drive piston and the booster piston are slidably connected to the inner walls of the drive cylinder and the booster cylinder, respectively. The two outlets of the automatic reversing valve are connected to the two ends of the drive cylinder through two parallel air distribution pipes. One-way throttle valves are installed on both air distribution pipes. The inlet and outlet of the booster cylinder are connected to the nitrogen source and the accumulator through air pipes. As a specific pressure conversion and transmission mechanism, the reciprocating booster cylinder has advantages over other types of pressure conversion and transmission devices, including small size, high pressure conversion and transmission efficiency, and good flexibility and mobility.

[0009] A further technical solution involves installing one-way valves on the gas pipes between the booster cylinder and the nitrogen source, as well as between the booster cylinder and the accumulator.

[0010] A further technical solution involves installing a pressure reducing valve on the air pipe between the compressed air source and the automatic reversing valve.

[0011] In a further technical solution, parallel guide strips and glyphs are fitted onto the sliding contact surfaces between the drive piston and the inner wall of the drive cylinder, as well as the sliding contact surfaces between the booster piston and the inner wall of the booster cylinder.

[0012] A further technical solution involves connecting a muffler externally to the inner cavity of the booster cylinder.

[0013] A further technical solution involves multiple energy storage devices arranged in parallel.

[0014] 3. Beneficial effects

[0015] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0016] This utility model discloses a nitrogen filling device for an accumulator, which is a highly efficient and convenient nitrogen filling equipment. It utilizes compressed air as a power source and, through a specific pressure conversion and transmission mechanism, delivers high-pressure nitrogen to the accumulator. During the filling process, the operator can control the valves to adjust the flow rate and pressure of the compressed air to ensure a smooth and safe nitrogen filling process. The pressure energy of the compressed air is converted into the power energy of a reciprocating booster cylinder to pressurize the nitrogen. The compressed air is equipped with pressure reducing and throttle valves to regulate and control the flow rate and pressure of nitrogen filling in the accumulator, ensuring a smooth and safe filling process. A pressure gauge at the high-pressure end displays the current nitrogen pressure, helping the operator monitor the filling process. The entire device can be designed and integrated into a small, easily transportable single housing, making it widely applicable. Attached Figure Description

[0017] Figure 1 A schematic diagram of the nitrogen filling device for the accumulator in a specific embodiment;

[0018] Figure 2 for Figure 1 A magnified structural diagram of part A.

[0019] In the diagram: 1-Compressed air source; 2-Automatic reversing valve; 3-Reciprocating booster cylinder; 4-Nitrogen source; 5-Accumulator; 6-Air pipe; 11-Pressure reducing valve; 21-Gas distribution pipe; 22-One-way throttle valve; 30-Baffle plate; 31-Drive cylinder; 32-Booster cylinder; 33-Drive piston; 34-Booster piston; 35-Piston rod; 36-Silencer; 37-Guide belt; 38-Glyd ring; 41-One-way throttle valve; 51-Oil circuit switch-pressure relief valve integrated block; 52-Accumulated pressure gauge. Detailed Implementation

[0020] To further understand the contents of this utility model, a detailed description of the utility model is provided in conjunction with the accompanying drawings.

[0021] Example 1

[0022] The nitrogen filling device for the accumulator in this embodiment, such as Figure 1 As shown, the system includes a compressed air source 1, an automatic reversing valve 2, a reciprocating booster cylinder 3, a nitrogen source 4, and an accumulator 5, as well as air pipes 6 connecting the various components. The compressed air source 1 is typically supplied by an air compressor, and the nitrogen source 4 is typically a high-pressure nitrogen tank. The reciprocating booster cylinder 3 includes a drive cylinder 31, a booster cylinder 32, a drive piston 33, a booster piston 34, and a piston rod 35. The diameter of the drive cylinder 31 is larger than that of the booster cylinder 32; in this embodiment, the diameter ratio is 2:1. The two cylinders are connected by a partition 3. 0. Fixed connection; the two ends of the piston rod 35 are fixedly connected to the drive piston 33 and the booster piston 34 respectively, and the drive piston 33 and the booster piston 34 are slidably connected to the inner walls of the drive cylinder 31 and the booster cylinder 32 respectively; the two outlets of the automatic reversing valve 2 are connected to the two ends of the drive cylinder 31 through two parallel gas distribution pipes 21 respectively; one-way throttle valves 22 are provided on each of the two gas distribution pipes 21; the inlet and outlet of the booster cylinder 32 are connected to the nitrogen source 4 and the accumulator 5 respectively through the gas pipes 6. One-way valves 41 are provided on the gas pipes 6 between the booster cylinder 32 and the nitrogen source 4, and between the booster cylinder 32 and the accumulator 5 respectively.

[0023] In this embodiment, the accumulator nitrogen filling device can be designed by integrating all the above-mentioned components into a single housing, making it a small, easy-to-carry single housing device.

[0024] High-pressure air from compressed air source 1 first passes through automatic reversing valve 2 and air pipe 6 to the booster cylinder 32 on the right side of drive piston 33. Drive piston 33 moves to the left, and booster piston 34 moves to the left accordingly. One-way valve 41 between booster cylinder 32 and nitrogen source 4 opens, and nitrogen from nitrogen source 4 enters booster cylinder 32 on the right side of booster piston 34. At this time, one-way valve 41 between booster cylinder 32 and accumulator 5 is closed. After a set amount of nitrogen enters booster cylinder 32, automatic reversing valve 2 changes the flow rate. In the air direction, the high-pressure air from compressed air source 1 passes through automatic reversing valve 2 and air pipe 6 to the booster cylinder 32 on the left side of drive piston 33. Drive piston 33 moves to the right, and booster piston 34 moves clockwise accordingly. One-way valve 41 between booster cylinder 32 and accumulator 5 opens, and nitrogen from booster cylinder 32 enters accumulator 5. At this time, one-way valve 41 between booster cylinder 32 and nitrogen source 4 is closed. Repeat the above action, and nitrogen continues to enter accumulator 5 until the nitrogen in accumulator 5 reaches the set value.

[0025] Example 2

[0026] The nitrogen filling device for the accumulator in this embodiment has the same basic structure as in Embodiment 1, with the following differences or improvements: Figure 1 As shown, a pressure reducing valve 11 is installed on the air pipe 6 between the compressed air source 1 and the automatic reversing valve 2 to control the working rhythm between the high-pressure air and the drive cylinder 31. Figure 1 , 2 As shown, parallel guide strips 37 and Glyd rings 38 are fitted onto the sliding contact surfaces between the drive piston 33 and the inner wall of the drive cylinder 31, as well as between the booster piston 34 and the inner wall of the booster cylinder 32. Typically, they are arranged in the form of guide strip 37: Glyd ring 38: guide strip 37, enhancing the sealing effect while improving the smooth and precise movement of the drive piston 33 and the booster piston 34. A muffler 36 is externally connected to the inner cavity of the booster cylinder 32 to reduce piston noise. Multiple accumulators 5 are arranged in parallel to improve energy storage efficiency within a limited space. Each accumulator 5 is externally connected to an oil circuit switch-pressure relief valve integrated block 52 to ensure energy storage safety. The one-way valve 41 between the booster cylinder 32 and the accumulator 5 is an energy storage one-way valve. Six air pipes between the energy storage one-way valve and the accumulator 5 are equipped with energy storage pressure gauges 22 to display the current nitrogen pressure in the accumulator 5, helping the operator monitor the charging process.

[0027] The nitrogen filling device for the accumulator in this embodiment uses compressed air as a power source. Through a specific pressure conversion and transmission mechanism of the reciprocating booster cylinder 3, high-pressure nitrogen is delivered to the accumulator 5. During the filling process, the operator can adjust the flow rate and pressure of the compressed air by controlling the one-way throttle valve 22 to ensure that the nitrogen filling of the accumulator is stable and safe. The pressure energy of the compressed air is converted into the power energy of the reciprocating booster cylinder 3 to boost the nitrogen. The integrated design is small in size, easy to transport, highly mobile and flexible, and has a wide range of applications.

[0028] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention. The actual structure and manufacturing steps are not limited to these. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A nitrogen filling device for an accumulator, characterized in that: It includes a compressed air source (1), an automatic reversing valve (2), a reciprocating booster cylinder (3), a nitrogen source (4), and an accumulator (5), as well as air pipes (6) connecting the various components, wherein: The reciprocating booster cylinder (3) includes a drive cylinder (31), a booster cylinder (32), a drive piston (33), a booster piston (34), and a piston rod (35); the diameter of the drive cylinder (31) is larger than that of the booster cylinder (32), and the two cylinders are fixedly connected by a partition plate (30); the two ends of the piston rod (35) are fixedly connected to the drive piston (33) and the booster piston (34) respectively, and the drive piston (33) and the booster piston (34) are slidably connected to the inner walls of the drive cylinder (31) and the booster cylinder (32) respectively; The two outlets of the automatic reversing valve (2) are connected to the two ends of the drive cylinder (31) through two parallel air distribution pipes (21); a one-way throttle valve (22) is provided on each of the two air distribution pipes (21); The air inlet and outlet of the booster cylinder (32) are connected to the nitrogen source (4) and the accumulator (5) through the air pipe (6), respectively.

2. The nitrogen filling device for the accumulator according to claim 1, characterized in that: One-way valves (41) are respectively installed on the gas pipe (6) between the booster cylinder (32) and the nitrogen source (4), and between the booster cylinder (32) and the accumulator (5).

3. The nitrogen filling device for the accumulator according to claim 2, characterized in that: A pressure reducing valve (11) is installed on the air pipe (6) between the compressed air source (1) and the automatic reversing valve (2).

4. The nitrogen filling device for the accumulator according to claim 3, characterized in that: On the sliding contact surface between the driving piston (33) and the inner wall of the driving cylinder (31), and on the sliding contact surface between the booster piston (34) and the inner wall of the booster cylinder (32), parallel guide strips (37) and glyphs (38) are fitted together.

5. The nitrogen filling device for the accumulator according to claim 3, characterized in that: The inner cavity of the booster cylinder (32) is externally connected to a muffler (36).

6. The nitrogen filling device for an accumulator according to any one of claims 1 to 5, characterized in that: The energy storage devices (5) are multiple in parallel.

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