A nitrogen-driven device

Abstract

This application provides a nitrogen-driven device, which includes a base, a first power cylinder, an accumulator, and a second power cylinder. The base is provided with an oil flow channel, which has a first pair of interfaces, a second pair of interfaces, and a third pair of interfaces. The first power cylinder is connected to the base and docks with the first pair of interfaces. The accumulator is connected to the base and docks with the second pair of interfaces. The accumulator has a nitrogen space inside, which stores nitrogen. The second power cylinder is connected to the base and docks with the third pair of interfaces. When the first power cylinder is in a retracted state, the oil inside the first power cylinder is output to the second and third pairs of interfaces through the first pair of interfaces. At this time, a portion of the oil is stored in the accumulator and compresses the nitrogen space, while the other portion of the oil drives the extension and retraction of the second power cylinder, so that the second power cylinder is in an extended state. The energy storage of the accumulator and the power output of the second power cylinder are realized by the downward pressure of the first power cylinder, preventing overpressure in the nitrogen-driven device.

Description

Technical Field

[0001] This utility model relates to the technical field of nitrogen-driven devices, and in particular to a nitrogen-driven device. Background Technology

[0002] With the development of technology, nitrogen-driven devices are applied in industry, used to convert energy into mechanical motion. In existing technology, nitrogen-driven devices include a base, a first power cylinder, and a second power cylinder, both connected to the base. The first power cylinder drives the power output of the second power cylinder. However, they cannot store energy, making them prone to overpressure. Utility Model Content

[0003] The purpose of this utility model is to provide a nitrogen-driven device. The base is provided with an oil flow channel, which has a first pair of interfaces, a second pair of interfaces, and a third pair of interfaces. These interfaces are interconnected. A first power cylinder is connected to the base and docks with the first pair of interfaces. An accumulator is connected to the base and positioned on one side of the first power cylinder. The accumulator docks with the second pair of interfaces. The accumulator contains a nitrogen space, which stores nitrogen. A second power cylinder is connected to the base and docks with the third pair of interfaces. When the first power cylinder is in a retracted state, the oil inside the first power cylinder is output to the second and third pairs of interfaces via the first pair of interfaces. At this time, a portion of the oil is stored in the accumulator and compresses the nitrogen space, while the other portion of the oil drives the extension and retraction of the second power cylinder, causing it to extend. The downward pressure of the first power cylinder enables the accumulator to store energy and the second power cylinder to output power, thus preventing energy storage failure and overpressure in the nitrogen-driven device.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a nitrogen-driven device, comprising: The base is provided with an oil flow channel, and the oil flow channel is provided with a first pair of interfaces, a second pair of interfaces, and a third pair of interfaces; the first pair of interfaces, the second pair of interfaces, and the third pair of interfaces are interconnected. The first power cylinder is connected to the base and docks with the first pair of interfaces; An accumulator is connected to the base and disposed on one side of the first power cylinder; the accumulator is connected to the second pair of interfaces; the accumulator has a built-in nitrogen space; the nitrogen space stores nitrogen. The second power cylinder is connected to the base and docks with the third pair of interfaces; When the first power cylinder is in the retracted state, the oil inside the first power cylinder is output to the second pair of interfaces and the third pair of interfaces through the first pair of interfaces. At this time, a part of the oil is stored in the accumulator and compresses the nitrogen space, while the other part of the oil drives the extension and retraction of the second power cylinder, so that the second power cylinder is in the extended state.

[0005] Optionally, the energy accumulator includes a housing and a piston seat, the piston seat being disposed within the housing and movably connected to the housing; A nitrogen space is formed between the upper sidewall of the piston seat and the inner sidewall of the housing. The size of the nitrogen space changes as the piston seat moves. The piston seat can compress the nitrogen in the nitrogen space, so that the accumulator is in an energy storage state.

[0006] Optionally, the peripheral sidewall of the piston seat is connected to a first sealing ring, and there are multiple first sealing rings arranged sequentially along the length direction of the piston seat. The first sealing ring is fitted onto the peripheral sidewall of the piston seat and makes sealing contact with the inner sidewall of the housing, so that the piston seat remains in a sealed state with the housing during movement.

[0007] Optionally, a first oil space is formed between the lower sidewall of the piston seat and the inner sidewall of the housing, and the first oil space is filled with lubricating oil; the first oil space changes accordingly with the change of the nitrogen space; The first oil space is connected to the second pair of interfaces, and is connected to the oil flow channel via the second pair of interfaces.

[0008] Optionally, the housing is provided with an air vent, which is built into the housing and communicates with the nitrogen space; the air vent is located above the nitrogen space and near the top of the housing; The nitrogen-driven device also includes a connector that is detachably connected to the housing and can block or open one end of the vent that is away from the nitrogen space.

[0009] Optionally, the first power cylinder includes a first cylinder body and a first piston rod; The first piston rod is movably connected to the first cylinder body, with the top of the first piston rod located outside the first cylinder body and used for applying pressure from external components; The first piston rod is provided with a first piston portion, which is located in the first cylinder and is movably connected to the first cylinder; the first piston portion descends as the first piston rod is pressed down, and discharges the lubricating oil in the first cylinder through the first coupling port.

[0010] Optionally, the first piston rod is provided with a first groove for storing a portion of the lubricating oil; the first groove is connected to the first coupling interface via the internal space of the first cylinder. The inner wall of the first cylinder body that connects to the first interface is provided with an arc-shaped converging sidewall.

[0011] Optionally, a second sealing ring is connected to the peripheral sidewall of the first piston portion. There are multiple second sealing rings, and the multiple second sealing rings are arranged sequentially along the length direction of the first piston portion. The second sealing ring is fitted onto the peripheral sidewall of the first piston portion and makes sealing contact with the inner sidewall of the first cylinder body, so that the first piston portion remains in a sealed state with the first cylinder body during movement.

[0012] Optionally, the second power cylinder is located on the outside of the base and is connected to the third pair of interfaces via an oil pipe; the second power cylinder is a driven cylinder, and the first power cylinder is an active cylinder; The second power cylinder includes a second cylinder body and a second piston rod; The second piston rod is movably connected to the second cylinder body, the top of the second piston rod is located outside the second cylinder body, and can act on another external component; The second piston rod is provided with a second piston portion, which is located in the second cylinder body and is movably connected to the second cylinder body; The lubricating oil input through the third pair of interfaces applies power to the second piston and drives the second piston rod to extend outward.

[0013] Optionally, the second piston rod is provided with a second groove for storing a portion of the lubricating oil; the second groove is connected to an oil pipe through the internal space of the second cylinder and is also connected to the third pair of interfaces through the oil pipe.

[0014] Compared with the prior art, the beneficial effects of this utility model are: This utility model provides a nitrogen-driven device. A base is provided with an oil flow channel, which has a first pair of interfaces, a second pair of interfaces, and a third pair of interfaces. The first, second, and third pairs of interfaces are interconnected. A first power cylinder is connected to the base and docks with the first pair of interfaces. An accumulator is connected to the base and positioned on one side of the first power cylinder. The accumulator docks with the second pair of interfaces. The accumulator contains a nitrogen space, which stores nitrogen. A second power cylinder is connected to the base and docks with the third pair of interfaces. When the first power cylinder is in a retracted state, the oil inside the first power cylinder is output to the second and third pairs of interfaces via the first pair of interfaces. At this time, a portion of the oil is stored in the accumulator and compresses the nitrogen space, while the other portion of the oil drives the extension and retraction of the second power cylinder, causing it to extend. The downward pressure of the first power cylinder enables the accumulator to store energy and the second power cylinder to output power, preventing energy storage failure and overpressure in the nitrogen-driven device. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings. In the following description, the same reference numerals denote the same parts.

[0017] Figure 1 A cross-sectional view of a nitrogen-driven device according to an embodiment of this application is shown in its initial state.

[0018] Figure 2 A cross-sectional view of a nitrogen-driven device in operation according to an embodiment of this application is shown.

[0019] Figure 3 A cross-sectional view of the first power cylinder of a nitrogen-driven device according to an embodiment of this application is shown.

[0020] Figure 4 A cross-sectional view of the accumulator of a nitrogen-driven device according to an embodiment of this application is shown.

[0021] Figure 5 A cross-sectional view of the second power cylinder of a nitrogen-driven device according to an embodiment of this application is shown.

[0022] Figure Labels 100. Nitrogen-driven device; 10. Base; 11. Oil flow channel; 111. First pair of interfaces; 112. Second pair of interfaces; 113. Third pair of interfaces; 20. First power cylinder; 21. First cylinder body; 211. Arc-shaped converging sidewall; 22. First piston rod; 22a. First groove; 221. First piston part; 2211. Second sealing ring; 30. Accumulator; 30a. Nitrogen space; 31. Shell; 31a. First oil space; 31b. Vent; 32. Piston seat; 321. First sealing ring; 40. Second power cylinder; 41. Second cylinder body; 42. Second piston rod; 42a. Second groove; 421. Second piston part; 50. Connector. Detailed Implementation

[0023] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0024] Please refer to the attached document. Figures 1-5 This application provides a nitrogen-driven device 100, which is used to store energy and provide power.

[0025] Please refer to the attached document. Figures 1-5In this embodiment, the nitrogen-driven device 100 includes a base 10, a first power cylinder 20, an accumulator 30, and a second power cylinder 40. The base 10 is provided with an oil flow channel 11, which has a first pair of interfaces 111, a second pair of interfaces 112, and a third pair of interfaces 113. The first pair of interfaces 111, the second pair of interfaces 112, and the third pair of interfaces 113 are interconnected. The first power cylinder 20 is connected to the base 10 and docks with the first pair of interfaces 111. The accumulator 30 is connected to the base 10 and is disposed on one side of the first power cylinder 20. The accumulator 30 docks with the second pair of interfaces 112. The accumulator 30 has a nitrogen space 30a inside. Nitrogen gas is stored in accumulator 30a; the second power cylinder 40 is connected to the base 10 and docked with the third pair of interfaces 113; when the first power cylinder 20 is in the retracted state, the oil inside the first power cylinder 20 is output to the second pair of interfaces 112 and the third pair of interfaces 113 through the first pair of interfaces 111. At this time, part of the oil is stored in the accumulator 30 and compresses the nitrogen space 30a, while the other part of the oil drives the extension and retraction of the second power cylinder 40, so that the second power cylinder 40 is in the extended state. The energy storage of the accumulator 30 and the power output of the second power cylinder 40 are realized by the downward pressure of the first power cylinder 20, thus avoiding the inability to store energy and preventing the nitrogen drive device 100 from being over-pressurized.

[0026] Please refer to the attached document. Figures 1-5 In this embodiment of the application, the base 10 is provided with an oil flow channel 11, and the oil flow channel 11 is provided with a first pair of interfaces 111, a second pair of interfaces 112 and a third pair of interfaces 113; the first pair of interfaces 111, the second pair of interfaces 112 and the third pair of interfaces 113 are interconnected so that the oil in the oil flow channel 11 flows relative to the first pair of interfaces 111, the second pair of interfaces 112 and the third pair of interfaces 113 respectively.

[0027] The first power cylinder 20 is disposed on the upper side of the base 10. The first power cylinder 20 is connected to the base 10 and docked with the first pair of interfaces 111. This allows the first power cylinder 20 to be fixed to the base 10, thereby facilitating the flow of oil from the first power cylinder 20 to the oil flow channel 11 via the first pair of interfaces 111.

[0028] Accumulator 30 is connected to base 10 and is located on the left side of first power cylinder 20; accumulator 30 is connected to second pair of interfaces 112 so that oil in oil flow channel 11 can flow to accumulator 30 through second pair of interfaces 112; accumulator 30 has a built-in nitrogen space 30a; nitrogen space 30a stores nitrogen to ensure nitrogen storage effect. The second power cylinder 40 is located on the right side of the base 10, connected to the base 10, and connected to the third pair of interfaces 113; so that the oil in the oil flow channel 11 can flow to the second power cylinder 40 through the third pair of interfaces 113. When the first power cylinder 20 is in the retracted state, the oil inside the first power cylinder 20 is output to the second pair of interfaces 112 and the third pair of interfaces 113 through the first pair of interfaces 111. At this time, part of the oil is stored in the accumulator 30 and compresses the nitrogen space 30a, while the other part of the oil drives the extension and retraction of the second power cylinder 40, so that the second power cylinder 40 is in the extended state. The energy storage of the accumulator 30 and the power output of the second power cylinder 40 are realized by the downward pressure of the first power cylinder 20, avoiding the inability to store energy and preventing the nitrogen drive device 100 from being over-pressurized.

[0029] Please refer to the attached document. Figures 1-2 4. In this embodiment of the application, the accumulator 30 includes a housing 31 and a piston seat 32. The piston seat 32 is disposed inside the housing 31 and is movably connected to the housing 31 to facilitate adjustment of the position of the piston seat 32 relative to the housing 31. The housing 31 is connected to the base 10 and docks with the second pair of interfaces 112. A nitrogen space 30a is formed between the upper sidewall of the piston seat 32 and the inner sidewall of the housing 31. The size of the nitrogen space 30a changes with the movement of the piston seat 32. The piston seat 32 can compress the nitrogen in the nitrogen space 30a, so that the accumulator 30 is in an energy storage state, ensuring the storage effect of nitrogen. When the piston seat 32 is higher than the housing 31, the nitrogen space 30a is smaller, and when the piston seat 32 is lower than the housing 31, the nitrogen space 30a is larger.

[0030] Please refer to the attached document. Figures 1-2 4. In this embodiment, the peripheral wall of the piston seat 32 is connected with a first sealing ring 321. There are multiple first sealing rings 321, which are arranged sequentially along the length of the piston seat 32. The first sealing rings 321 are sleeved on the peripheral wall of the piston seat 32 and sealably contact the inner wall of the housing 31, so that the piston seat 32 is continuously sealed with the housing 31 during movement. By arranging multiple first sealing rings 321, the sealing effect between the piston seat 32 and the housing 31 is increased. When a first sealing ring 321 fails, the piston seat 32 and the housing 31 maintain a sealing effect, preventing oil from entering the nitrogen space 30a through the gap between the piston seat 32 and the housing 31.

[0031] Please refer to the attached document. Figures 1-24. In this embodiment of the application, a first oil space 31a is formed between the lower sidewall of the piston seat 32 and the inner sidewall of the housing 31. The first oil space 31a is filled with lubricating oil. The first oil space 31a changes accordingly with the change of the nitrogen space 30a. The first oil space 31a is connected to the second pair of interfaces 112 and is connected to the oil flow channel 11 through the second pair of interfaces 112. When the oil in the oil flow channel 11 flows to the first oil space 31a through the second pair of interfaces 112, the oil lifts the piston seat 32 so that the piston seat 32 moves upward relative to the housing 31, thereby reducing the area of ​​the nitrogen space 30a.

[0032] Please refer to the attached document. Figures 1-2 4. In this embodiment, the housing 31 is provided with a vent 31b, which is built into the housing 31 and communicates with the nitrogen space 30a. The vent 31b is located above the nitrogen space 30a and close to the top of the housing 31, so that the nitrogen in the nitrogen space 30a can flow to the external environment through the vent 31b, thereby facilitating the discharge of nitrogen. Alternatively, external nitrogen can flow into the nitrogen space 30a through the vent 31b.

[0033] Please refer to the attached document. Figures 1-2 4. The nitrogen-driven device 100 also includes a connector 50, which is detachably connected to the housing 31 so that the connector 50 can be connected to or disconnected from the housing 31. The connector 50 can block or open the end of the vent 31b away from the nitrogen space 30a, so as to realize the communication or disconnection of the vent 31b with respect to the external environment. Optionally, the connector 50 is detachably connected to the housing 31 by means of a threaded connection.

[0034] Please refer to the attached document. Figures 1-3 In this embodiment, the first power cylinder 20 includes a first cylinder body 21 and a first piston rod 22. The first piston rod 22 is movably connected to the first cylinder body 21 to adjust its position relative to the first cylinder body 21. The top of the first piston rod 22 is located outside the first cylinder body 21 and is used for external components to apply pressure. This allows external components to press the first piston rod 22, facilitating its downward movement. The first piston rod 22 has a first piston portion 221, which is located inside the first cylinder body 21 and movably connected to it. The first piston portion 221 descends as the first piston rod 22 is pressed down, discharging the lubricating oil in the first cylinder body 21 through the first pair of ports 111. This allows the lubricating oil to flow through the first pair of ports 111 into the oil flow channel 11, ensuring the effective discharge of lubricating oil from the first cylinder body 21.

[0035] Please refer to the attached document. Figures 1-3In this embodiment, the first piston rod 22 is provided with a first groove 22a, which is used to store a portion of the lubricating oil. The first groove 22a is connected to the first pair of interfaces 111 through the internal space of the first cylinder 21, so that the lubricating oil in the first groove 22a can flow to the first pair of interfaces 111 through the internal space of the first cylinder 21. The inner sidewall of the first cylinder 21 that connects to the first pair of interfaces 111 is provided with an arc-shaped converging sidewall 211, so that the lubricating oil in the first cylinder 21 can be converged at the first pair of interfaces 111 through the arc-shaped converging sidewall 211, thus ensuring the flow trajectory of the lubricating oil.

[0036] Please refer to the attached document. Figures 1-3 In this embodiment, a second sealing ring 2211 is connected to the peripheral sidewall of the first piston portion 221. Multiple second sealing rings 2211 are arranged sequentially along the length of the first piston portion 221. The second sealing rings 2211 are fitted onto the peripheral sidewall of the first piston portion 221 and make sealing contact with the inner sidewall of the first cylinder body 21, ensuring that the first piston portion 221 remains in a sealed state with the first cylinder body 21 during movement. By arranging multiple second sealing rings 2211, the sealing effect between the first piston portion 221 and the first cylinder body 21 is increased. When one second sealing ring 2211 fails, the sealing effect between the first piston portion 221 and the first cylinder body 21 is maintained, preventing oil from entering the external environment through the gap between the first piston portion 221 and the first cylinder body 21.

[0037] Please refer to the attached document. Figures 1-2 5. In this embodiment, the second power cylinder 40 is disposed on the outside of the base 10 and connected to the third pair of interfaces 113 via an oil pipe, so that the oil output from the third pair of interfaces 113 flows to the second power cylinder 40 via the oil pipe; the second power cylinder 40 is a driven cylinder, and the first power cylinder 20 is a driven cylinder, so that the first power cylinder 20 drives the second power cylinder 40 to output power. Optionally, the second power cylinder 40 is arranged in an inclined direction, a horizontal direction, or a vertical direction.

[0038] The second power cylinder 40 includes a second cylinder body 41 and a second piston rod 42. The second piston rod 42 is movably connected to the second cylinder body 41 to adjust the position of the second piston rod 42 relative to the second cylinder body 41. The top of the second piston rod 42 is located outside the second cylinder body 41 and can act on another external component. This allows the power of the second piston rod 42 to be transmitted to the other external component, thereby facilitating the provision of power to the other external component to enable the second piston rod 42 to punch or flang the other external component.

[0039] The second piston rod 42 is provided with a second piston part 421, which is located inside the second cylinder 41 and is movably connected to the second cylinder 41. This allows for adjustment of the position of the second piston part 421 relative to the second cylinder 41. Lubricating oil input through the third pair of interfaces 113 applies power to the second piston part 421 and drives the second piston rod 42 to extend outward, thereby providing power to the second piston rod 42.

[0040] Please refer to the attached document. Figures 1-2 5. In this embodiment of the application, the second piston rod 42 is provided with a second groove 42a, which is used to store a portion of the lubricating oil; the second groove 42a is connected to an oil pipe through the internal space of the second cylinder 41, and is connected to a third pair of interfaces 113 through the oil pipe, so that the oil output from the third pair of interfaces 113 flows through the oil pipe and the internal space of the second cylinder 41 to the second groove 42a, thereby facilitating the oil to squeeze the second piston rod 42.

[0041] Compared with the prior art, the beneficial effects of this utility model are: This utility model provides a nitrogen-driven device 100. A base 10 is provided with an oil flow channel 11, which has a first pair of interfaces 111, a second pair of interfaces 112, and a third pair of interfaces 113. The first pair of interfaces 111, the second pair of interfaces 112, and the third pair of interfaces 113 are interconnected. A first power cylinder 20 is connected to the base 10 and docks with the first pair of interfaces 111. An accumulator 30 is connected to the base 10 and is disposed on one side of the first power cylinder 20. The accumulator 30 docks with the second pair of interfaces 112. The accumulator 30 has a built-in nitrogen space 30a, which stores nitrogen. A second power cylinder 4... The 0 is connected to the base 10 and docked with the third pair of interfaces 113. When the first power cylinder 20 is in the retracted state, the oil inside the first power cylinder 20 is output to the second pair of interfaces 112 and the third pair of interfaces 113 through the first pair of interfaces 111. At this time, part of the oil is stored in the accumulator 30 and compresses the nitrogen space 30a. The other part of the oil drives the extension and retraction of the second power cylinder 40, so that the second power cylinder 40 is in the extended state. The energy storage of the accumulator 30 and the power output of the second power cylinder 40 are realized by the downward pressure of the first power cylinder 20, avoiding the inability to store energy and preventing the nitrogen drive device 100 from being over-pressurized.

[0042] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indicator will also change accordingly.

[0043] It should also be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or may be connected to an intermediary component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component through an intermediary component.

[0044] Furthermore, the use of terms such as "" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0045] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A nitrogen-driven device, characterized in that, include: The base is provided with an oil flow channel, and the oil flow channel is provided with a first pair of interfaces, a second pair of interfaces, and a third pair of interfaces; the first pair of interfaces, the second pair of interfaces, and the third pair of interfaces are interconnected. The first power cylinder is connected to the base and docks with the first pair of interfaces; An accumulator is connected to the base and disposed on one side of the first power cylinder; the accumulator is connected to the second pair of interfaces; the accumulator has a built-in nitrogen space; the nitrogen space stores nitrogen. The second power cylinder is connected to the base and docks with the third pair of interfaces; When the first power cylinder is in the retracted state, the oil inside the first power cylinder is output to the second pair of interfaces and the third pair of interfaces through the first pair of interfaces. At this time, a part of the oil is stored in the accumulator and compresses the nitrogen space, while the other part of the oil drives the extension and retraction of the second power cylinder, so that the second power cylinder is in the extended state.

2. The nitrogen-driven device according to claim 1, characterized in that, The energy accumulator includes a housing and a piston seat, the piston seat being disposed inside the housing and movably connected to the housing; A nitrogen space is formed between the upper sidewall of the piston seat and the inner sidewall of the housing. The size of the nitrogen space changes as the piston seat moves. The piston seat can compress the nitrogen in the nitrogen space, so that the accumulator is in an energy storage state.

3. The nitrogen-driven device according to claim 2, characterized in that, The piston seat is connected to a first sealing ring on its peripheral sidewall. There are multiple first sealing rings, and the multiple first sealing rings are arranged sequentially along the length direction of the piston seat. The first sealing ring is fitted onto the peripheral sidewall of the piston seat and makes sealing contact with the inner sidewall of the housing, so that the piston seat remains in a sealed state with the housing during movement.

4. The nitrogen-driven device according to claim 3, characterized in that, A first oil space is formed between the lower sidewall of the piston seat and the inner sidewall of the housing, and the first oil space is filled with lubricating oil; the first oil space changes accordingly with the change of the nitrogen space. The first oil space is connected to the second pair of interfaces, and is connected to the oil flow channel via the second pair of interfaces.

5. The nitrogen-driven device according to claim 3, characterized in that, The housing is provided with an air vent, which is built into the housing and communicates with the nitrogen space; the air vent is located above the nitrogen space and near the top of the housing; The nitrogen-driven device also includes a connector that is detachably connected to the housing and can block or open one end of the vent that is away from the nitrogen space.

6. The nitrogen-driven device according to any one of claims 1 to 5, characterized in that, The first power cylinder includes a first cylinder body and a first piston rod; The first piston rod is movably connected to the first cylinder body, with the top of the first piston rod located outside the first cylinder body and used for applying pressure from external components; The first piston rod is provided with a first piston portion, which is located in the first cylinder and is movably connected to the first cylinder; the first piston portion descends as the first piston rod is pressed down, and discharges the lubricating oil in the first cylinder through the first coupling port.

7. The nitrogen-driven device according to claim 6, characterized in that, The first piston rod has a first groove inside, which is used to store a portion of the lubricating oil; the first groove is connected to the first coupling interface through the internal space of the first cylinder. The inner wall of the first cylinder body that connects to the first interface is provided with an arc-shaped converging sidewall.

8. The nitrogen-driven device according to claim 7, characterized in that, The peripheral sidewall of the first piston portion is connected to a second sealing ring, and there are multiple second sealing rings arranged sequentially along the length direction of the first piston portion. The second sealing ring is fitted onto the peripheral sidewall of the first piston portion and makes sealing contact with the inner sidewall of the first cylinder body, so that the first piston portion remains in a sealed state with the first cylinder body during movement.

9. The nitrogen-driven device according to any one of claims 1 to 5, characterized in that, The second power cylinder is located on the outside of the base and is connected to the third pair of interfaces via an oil pipe; the second power cylinder is a driven cylinder, and the first power cylinder is a driving cylinder; The second power cylinder includes a second cylinder body and a second piston rod; The second piston rod is movably connected to the second cylinder body, the top of the second piston rod is located outside the second cylinder body, and can act on another external component; The second piston rod is provided with a second piston portion, which is located in the second cylinder body and is movably connected to the second cylinder body; The lubricating oil input through the third pair of interfaces applies power to the second piston and drives the second piston rod to extend outward.

10. The nitrogen-driven device according to claim 9, characterized in that, The second piston rod has a second groove inside, which is used to store a portion of the lubricating oil; the second groove is connected to an oil pipe through the internal space of the second cylinder, and is also connected to the third pair of interfaces through the oil pipe.

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