Energy accumulator

Abstract

The utility model discloses an energy accumulator, which relates to the technical field of fluid energy storage equipment and comprises an energy accumulator body, a piston, a heavy hammer and an air bag, the energy accumulator body comprises an energy accumulator cylinder body; the lower portion of the energy accumulator cylinder body is provided with an oil inlet connector, an oil discharge connector and an oil supply port, and the upper portion of the energy accumulator cylinder body is provided with an oil recovery port. The piston, the heavy hammer and the air bag are arranged in the energy accumulator cylinder body; the heavy hammer is arranged above the piston; an air bag is arranged in a central groove in the lower part of the piston; the piston lifting device comprises a driving unit and a pulley mechanism; the driving unit is connected with the pulley mechanism, and the pulley mechanism is connected with the piston, so that when the piston, the air bag and the heavy hammer act together, the effect of the heavy hammer energy accumulator which assists in increasing the pressure regulating reaction speed through the air bag is achieved; or when the driving unit, the pulley mechanism, the piston, the heavy hammer and the air bag act together, the effect of the heavy hammer energy accumulator which can adjust the output pressure through the driving unit and can assist in improving the pressure adjusting reaction speed through the air bag is achieved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of fluid energy storage devices, and particularly relates to an energy accumulator. BACKGROUND

[0002] Hydraulic systems are widely used in various industries due to their high power density and large output force, but they also face the problem of low energy efficiency. With the global demand for the double carbon target, it is particularly important to improve the energy efficiency of hydraulic systems. The independent control system of valve port (IMCS) breaks the coupling of the inlet and outlet valve ports of the traditional hydraulic valve, improves the control flexibility of the system by introducing additional control degrees of freedom and expanding the working mode, and significantly reduces energy consumption by changing the flow path to realize energy recovery and regeneration. In addition, IMCS introduces electronic sensors and software programming control, further improving the intelligent level of the hydraulic system. Compared with traditional hydraulic systems, the unique circuit structure of the valve port independent system increases the control degrees of freedom and information perception, achieving high energy efficiency, strong compatibility, and excellent control performance. However, these characteristics also put higher requirements on component and system control work. Although there are many valve port independent control multi-way valves and their hydraulic systems on the market, there are still some problems to be solved in engineering or factory applications, and the problem of low efficiency of the pump source, especially the pump source system of the quantitative pump + overflow valve, needs to be solved urgently.

[0003] In existing mechanical equipment manufacturing enterprises, due to the large number of hydraulic equipment in the factory and the concentration of the hydraulic equipment, each hydraulic equipment generally uses an independent pump station to meet the supply level of high, medium and low pressure levels or flow levels. In order to maintain pressure stability, the hydraulic system is provided with an overflow valve, but the overflow valve system usually has the problem of low efficiency. Especially in the standby state of the equipment, the overflow loss is larger, the oil temperature rises larger, and auxiliary cooling of the oil is required to add auxiliary heat dissipation settings, which further consumes social resources such as electricity and increases the temperature rise of the environment, so a new solution is urgently needed. In the prior art, the accumulator is usually used to assist in solving the above problems. The accumulator plays an indispensable role in the hydraulic system. Not only does it serve as an auxiliary energy source to ensure that the hydraulic system can work stably when performing intermittent actions or long working time cycles, but it can also act as a power source in emergency situations to ensure the stability of the system in the event of sudden power failure and other accidents, avoiding damage or safety accidents. There are three types of conventional accumulators:

[0004] The first type is a spring-type accumulator, which has a simple structure, but its capacity is small, and it is more suitable for low-pressure and low-cycle-frequency environments. However, its reaction capacity decreases in high-pressure environments, so it is not suitable for high-pressure environments.

[0005] Among them, the second is a conventional type of heavy accumulator, which stores and releases energy through the change of the position of the heavy hammer; when the heavy hammer passes through the plunger, it will exert force on the hydraulic oil, thereby generating pressure. This accumulator has a simple structure, but its pressure is low, the sensitivity is slightly poor, and it is usually more suitable for application in the hydraulic system of large fixed equipment, and cannot be applied to fast reaction and high pressure demand occasions;

[0006] Among them, the third is a gas-loaded accumulator, which stores and releases energy through the expansion and compression of sealed gas; this type of accumulator is usually filled with inert gas or nitrogen; its specific types include gas bag type accumulators and piston type accumulators; among them, the gas bag type accumulator is usually used in low pressure and low frequency occasions, and has low energy density, does not support high frequency energy storage and release, and the volume of the gas bag type accumulator is limited and cannot be too large, and cannot withstand a large pressure, and once the skin bag is broken, the accumulator will suddenly fail; and the piston type accumulator is usually more suitable for low pressure conditions and is not suitable for high frequency motion; and the piston type accumulator has high requirements for the sealing effect of the sealing element, and the processing accuracy of the inner wall of the shell is also high, so the process accuracy is required to be high, otherwise leakage may occur, so the cost of the piston type accumulator is higher than that of other accumulators.

[0007] Therefore, the existing conventional accumulator has some reaction sensitivity but small capacity or low pressure, some high pressure but not fast enough reaction, some fast reaction and high pressure but small capacity, all of which are difficult to meet the needs of centralized energy supply, therefore, it is urgent to develop an accumulator that can meet the needs of centralized energy supply, which can provide centralized energy to uniformly supply oil energy to each device, improve the utilization rate of the hydraulic system, and also can reduce or eliminate hydraulic overflow loss during idling, and provide reliable and stable pressure hydraulic energy. Invention content

[0008] The present application provides an accumulator to solve the above technical problems, which can meet the needs of centralized energy supply, can provide centralized energy to uniformly supply oil energy to each device, improve the utilization rate of the hydraulic system, and also can reduce or eliminate hydraulic overflow loss during idling, and provide reliable and stable pressure hydraulic energy.

[0009] The technical scheme adopted by the present application is:

[0010] An accumulator includes an accumulator body, a piston, a counterweight, and an air bladder. The accumulator body includes an accumulator cylinder. The lower part of the accumulator cylinder has an oil inlet, an oil outlet, and an oil supply port, and the upper part of the accumulator cylinder has a recovery port. The piston, counterweight, and air bladder are disposed within the accumulator cylinder. The counterweight is positioned above the piston. The air bladder is disposed in a central groove at the lower part of the piston. A piston lifting device includes a drive unit and a pulley mechanism. The drive unit is connected to the pulley mechanism, and the pulley mechanism is connected to the piston, so that when the piston, air bladder, and counterweight work together, the counterweight accumulator functions as a counterweight accumulator, with the air bladder assisting in improving the pressure regulation response speed; or, when the drive unit, pulley mechanism, piston, counterweight, and air bladder work together, the counterweight accumulator functions as a counterweight accumulator, with the air bladder assisting in improving the pressure regulation response speed. When the airbags work together, the accumulator functions as a heavy hammer, capable of adjusting the output pressure via the drive unit and simultaneously improving the pressure regulation response speed with the assistance of the airbags. The piston includes a piston body, a sealing ring, and a lifting ring. A sealing ring is installed between the circumference of the piston body and the accumulator cylinder. A pressure regulating support is installed inside the sealing ring. By adjusting the inflation pressure inside the pressure regulating support, the frictional resistance between the piston and the accumulator cylinder or the amount of oil leakage from the sealing ring can be controlled. The upper part of the piston has an oil storage space for leaking oil. The oil stored in the space can provide lubrication to the sealing ring between the piston and the accumulator cylinder from above, thereby reducing friction and improving the flexibility and acceleration response of the overall up-and-down movement of the heavy hammer piston.

[0011] In a preferred embodiment, the pulley mechanism includes a first pulley, a second pulley, a third winding pulley, a first connecting rope, and a second connecting rope. The central shaft of the first pulley is connected to a lifting ring on the piston via the first connecting rope. The central shaft of the second pulley is located above the first pulley. The second pulley is a fixed pulley. The third winding pulley is connected to the drive unit. One end of the second connecting rope is located on the central shaft of the second pulley or at the fixed end of the second pulley. After passing over the first and second pulleys, the other end is wound around and connected to the third winding pulley. A clutch and a brake device are provided between the drive unit and the third winding pulley. The drive unit can drive the third winding pulley to rotate, so that the second connecting rope can drive the central shaft of the first pulley to move up and down, thereby driving the first connecting rope and the piston to rise along the accumulator cylinder or controlling the piston's descent speed. The clutch allows the drive unit to separate or engage with the third winding pulley. The brake device slows down or stops the movement of the third winding pulley, thereby slowing down the piston's descent speed or causing it to hover.

[0012] In a preferred embodiment, an annular groove is formed on the outer periphery of the piston body, and a sealing ring is disposed within the annular groove; a lifting ring for connecting to a first connecting rope is connected to the top of the piston body; the sealing ring includes a support ring, a pressure regulating support, and a sealing slip ring; the support ring includes an upper support ring and a lower support ring; the upper and lower support rings are connected to the upper and lower sides of the annular groove; a pressure regulating support is disposed within the annular groove between the support ring and the lower support ring; the sealing slip ring is disposed between the pressure regulating support and the accumulator cylinder, with the upper part of the sealing slip ring fixed by the upper support ring and the lower part of the sealing slip ring fixed by the lower support ring.

[0013] In a preferred embodiment, a first inflation channel is provided in the piston body; a second inflation channel is provided in the upper support ring; an inflation hose is provided in the first inflation channel, one end of the inflation hose passes through the second inflation channel of the upper support ring and is connected to the pressure regulating support tire, and the other end of the inflation hose is connected to a first inflation port outside the accumulator cylinder body, which is used to connect to an external inflation mechanism.

[0014] In a preferred embodiment, an air bladder is installed in the central groove at the bottom of the piston, and a third inflation channel connected to the air bladder is also provided in the piston body. One end of the third inflation channel is connected to the middle of the central groove at the bottom of the piston, and a sealing ring surface and threads are provided. A sealing rubber is provided around the inflation port of the air bladder, and the sealing rubber corresponds to the sealing ring surface. The threaded connection between the stud of the inflation port of the air bladder and the threaded connection at the bottom of the third inflation channel is made so that the sealing rubber and the sealing ring surface are pressed together to form a sealing strip, preventing oil in the piston cylinder from entering the interior of the third inflation channel. The other end of the third inflation channel is connected to the air bladder inflation hose, and the other end of the air bladder inflation hose is connected to a second inflation port outside the accumulator cylinder for inflating or deflating the air bladder. The second inflation port is used to connect to an external nitrogen filling trolley.

[0015] In a preferred embodiment, at least one oil return channel is also provided within the piston body; a recovery check valve is connected inside the oil return channel to ensure that the oil inside the accumulator cylinder does not flow back to the top of the piston body; the recovery check valve has a preset back pressure, which ensures that the oil above the piston can lubricate the sealing slip ring through the gap between the piston and the accumulator cylinder when the piston is in the downward working state, instead of returning to the inside of the accumulator cylinder through the oil return channel; the recovery check valve can open during the upward movement of the piston body along the accumulator cylinder, so that the oil on the piston... The oil in the piston returns to the accumulator cylinder through the oil return channel to prevent the formation of vacuum bubbles or vapor bubbles caused by the upward suction of the piston. A filter screen or filter is connected to the upper end of the oil return channel. An exhaust channel is also provided inside the piston body, and a gas-liquid recovery ring groove is formed in a ring along the inner wall of the central groove of the piston body to fully absorb the gas in the central groove. The exhaust channel extends vertically along the piston body to the gas-liquid recovery ring groove, so that the gas-liquid recovery ring groove is connected to the exhaust channel. An exhaust valve is connected above the exhaust channel.

[0016] In one preferred embodiment, the upper part of the piston body has symmetrically arranged counterweight fixing grooves around the lifting ring, and counterweights of the same weight and volume are respectively arranged in the counterweight fixing grooves on both sides; a liquid level alarm is installed at the outlet above the oil return channel, and the alarm threshold of the liquid level alarm is not higher than the filter screen above the oil return channel; a cavity facing the inside of the accumulator cylinder is provided in the central groove of the piston body, and the air bag is an inverted cone, which is set in the cavity of the piston body to ensure that it does not abut against the peripheral wall of the cavity.

[0017] In a preferred embodiment, a piston position sensor is installed on the accumulator cylinder. The piston position sensor is located on the outside of the accumulator cylinder and does not contact the piston body. A sensing device that senses the piston position sensor is installed on the piston body. The piston position sensor is set with a lower alarm threshold and an upper alarm threshold. By feeding back the liquid level data measured by the liquid level alarm gauge on the piston body to the drive unit, the drive unit adjusts the speed at which the piston rises along the accumulator cylinder to prevent the piston from rising too fast and causing the oil in the upper part of the piston to be completely sucked in, which in turn causes the air in the upper part of the accumulator cylinder to be sucked in.

[0018] In a preferred embodiment, a dust cover is provided outside the accumulator cylinder body, and a sealing ring or cable tie is provided at the connection between the dust cover and the first connecting rope to prevent dust from entering the upper part of the piston body from between the dust cover and the first connecting rope; grooves or retaining rings are provided on the outer wall of the dust cover and the accumulator cylinder body to fix the edge of the dust cover to the outside of the accumulator cylinder body.

[0019] As a preferred embodiment, the lower edge of the accumulator cylinder body connected to the dust cover is also connected to a fourth airflow channel. An air drying filter is installed on the channel to ensure that the air above the piston body inside the dust cover and the accumulator cylinder body can be filtered and dried by the air drying filter before flowing, preventing water vapor from entering the upper part of the piston.

[0020] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0021] 1. The accumulator of this application includes an accumulator body, a counterweight, a piston, an air bladder, and a piston lifting device; the accumulator body includes an accumulator cylinder; the accumulator cylinder has an oil inlet on one side; the piston, counterweight, and air bladder are disposed within the accumulator cylinder; the counterweight is disposed above the piston; the air bladder is disposed in the central groove at the lower part of the piston; a pressure regulating support is also connected between the periphery of the piston and the accumulator cylinder; wherein the air bladder can improve the problem of slightly poor sensitivity of conventional counterweight-type accumulators; the accumulator piston lifting device includes a drive unit and a pulley mechanism; the drive unit can realize the function of driving the piston to move upward along the accumulator cylinder through the pulley mechanism to replenish the oil in the accumulator cylinder or to reduce the output pressure of the accumulator; or, by suspending the piston or after the piston reaches the upper or lower dead center of the pulley mechanism, the inflation pressure of the pressure regulating support is set to ensure sufficient sealing conditions, and the inflation pressure in the air bladder is set to regulate the pressure of the accumulator, thereby achieving the function of an air bladder-type accumulator. Alternatively, by having the drive unit float freely with the piston, the inflation pressure of the pressure-regulating support tire in the piston can be set. The piston's own weight and the number of counterweights of varying weights can be adjusted to maintain the required constant pressure in the accumulator cylinder, thus achieving a constant pressure function similar to a counterweight-type accumulator. Alternatively, the airbag and counterweights can work together to achieve a rapid response accumulator function under constant pressure; or the counterweights, piston, and drive unit can work together to adjust the pressure exerted by the piston on the oil, allowing the airbag to provide constant pressure energy through rapid response or absorption of reverse impacts.

[0022] The energy storage device of this application can overcome the limitations of existing energy storage devices, which are either highly sensitive but have small capacity or low pressure, or have high pressure but slow response, or have a fast response but small capacity. It can achieve adjustable capacity and pressure, sensitive response, and meet the needs of centralized energy supply.

[0023] 2. The piston used in this application includes a piston body, a sealing ring, and a lifting ring. An oil return channel is provided on the piston body for oil leakage recovery, and a recovery check valve is installed within the channel. The sealing ring limits the amount of oil leakage between the piston body and the accumulator cylinder. The sealing ring can ensure sufficient sealing clearance δ between the piston body and the accumulator cylinder based on tire expansion and pressure. Given a constant leakage Q at both ends of the seal, the pressure difference P-P0 = ΔP at both ends of the seal is inversely proportional to the cube of δ. Therefore, the smaller δ is, the higher the pressure P established within the piston. The pressure P is adjusted by the tire expansion. Since the compressibility of air inside the tire is greater than that of rubber, it provides a larger floating seal margin, which reduces the clearance or positional accuracy between the piston and the accumulator cylinder, thus reducing manufacturing difficulty. This allows for the more economical production of larger cylinders and pistons, further increasing the accumulator's oil storage capacity to meet the centralized energy supply needs of large fixed equipment or multiple pieces of equipment in a factory. Increasing the number of counterweights further increases the accumulator's pressure. Attached Figure Description

[0024] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0025] Figure 1 This is a schematic diagram of the structure of an energy storage device according to one embodiment of this application;

[0026] In the picture,

[0027] 1. Accumulator body; 2. Piston; 21. Piston body; 22. Sealing ring; 221. Support ring; 222. Pressure regulating support tire; 223. Sealing slip ring; 3. Counterweight; 4. Airbag; 5. Central groove; 6. Pulley mechanism; 61. First pulley; 62. Second pulley; 63. Third winding wheel; 64. First connecting rope; 65. Second connecting rope; 7. First inflation channel; 8. Inflation hose; 9. Oil return channel; 10. Recovery check valve; 11. Air dryer filter; 12. Dust cover; 13. Piston position sensor; 14. Third inflation channel. Detailed Implementation

[0028] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0029] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0030] Furthermore, it should be understood in the description of this application that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0031] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "implementation," "example," "a particular embodiment," "example," or "specific example," etc., indicate that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0033] This application relates to an energy storage device, such as... Figure 1 As shown, the device includes an accumulator body 1, a piston 2, a counterweight 3, and an airbag 4. The accumulator body 1 includes an accumulator cylinder. The lower part of the accumulator cylinder has an oil inlet, an oil outlet, and an oil supply port, while the upper part of the accumulator cylinder has a recovery port. The piston 2, counterweight 3, and airbag 4 are disposed within the accumulator cylinder. The counterweight 3 is positioned above the piston 2. The airbag 4 is disposed in the central groove 5 at the lower part of the piston 2. The piston 2 lifting device includes a drive unit and a pulley mechanism 6. The drive unit is connected to the pulley mechanism 6, and the pulley mechanism 6 is connected to the piston 2. This allows the counterweight 3 to function as an accumulator by improving the pressure regulation response speed with the assistance of the airbag 4 when the piston 2, airbag 4, and counterweight 3 work together. Alternatively, when the drive unit, pulley mechanism 6, piston 2, counterweight 3, and airbag 4 work together, the counterweight 3 can both adjust the output pressure through the drive unit and improve the pressure regulation response speed with the assistance of the airbag 4.

[0034] The piston 2 includes a piston body 21, a sealing ring 22, and a lifting ring. A sealing ring 22 is provided between the periphery of the piston body 21 and the accumulator cylinder. A pressure regulating support 222 is provided inside the sealing ring 22. The movement friction resistance between the piston 2 and the accumulator cylinder or the oil leakage of the sealing ring 22 is controlled by adjusting the inflation pressure inside the pressure regulating support 222. The upper part of the piston 2 has an oil storage space for leaking oil. The oil stored therein can provide lubrication to the sealing ring 22 between the piston 2 and the accumulator cylinder from the top, thereby reducing friction and improving the flexibility and acceleration response of the overall up-and-down movement of the hammer 3 and piston 2.

[0035] This application utilizes the number of weighted hammers 3 of varying weights to adjust the set maximum output pressure of the piston 2 on the oil inside the piston 2 cylinder. Furthermore, this application utilizes the air bladder 4 within the piston 2 to address the problem of sudden drops in oil output pressure caused by piston 2 jamming; it can also utilize the air bladder 4 within the piston 2 to adjust the inflation pressure within the pressure regulating support tire 222, thereby resolving the piston 2 jamming problem while simultaneously helping to stabilize the accumulator pressure. Furthermore, in this application, the drive unit and piston 2 can be independently floated without any interaction. The maximum output pressure of the accumulator 3 can be reduced by adjusting the amount of oil leakage between piston 2 and cylinder by reducing the inflation pressure in the pressure regulating support tire 222. Alternatively, the weight of the accumulator 3 on the upper part of piston 2 can be indirectly reduced by the drive unit to adjust the setting of the accumulator's maximum output pressure and achieve a fast-responding accumulator function. Or, the drive unit, pulley mechanism 6, piston 2, accumulator 3 and airbag 4 can work together to achieve a fast-responding accumulator function that can adjust the output pressure. The fast-responding capability is mainly achieved by the airbag 4 to complete the fast response or absorb the reverse impact.

[0036] It should be noted that the pressure value in the airbag 4 can be adjusted by an external pressure regulating device, or an inflated airbag 4 can be placed in the piston 2 of the weight 3.

[0037] In a preferred embodiment, the pulley mechanism 6 includes a first pulley 61, a second pulley 62, a third winding pulley 63, a first connecting rope 64, and a second connecting rope 65;

[0038] The central shaft of the first pulley 61 is connected to the lifting ring on the piston 2 via the first connecting rope 64; the central shaft of the second pulley 62 is located above the first pulley 61, the second pulley 62 is a fixed pulley, the third winding wheel 63 is connected to the drive unit, one end of the second connecting rope 65 is located on the central shaft of the second pulley 62 or the fixed end of the second pulley 62, and then after passing around the first pulley 61 and the second pulley 62, the other end is wound and connected to the third winding wheel 63;

[0039] A clutch and a brake are provided between the drive unit and the third reel 63. The drive unit can drive the third reel 63 to rotate, so that the second connecting rope 65 can drive the central shaft of the first pulley 61 to move up and down, thereby driving the first connecting rope 64 and the piston 2 to rise along the accumulator cylinder or controlling the descent speed of the piston 2. The clutch can separate or engage the drive unit and the third reel 63. The brake can slow down or stop the movement of the third reel 63, thereby slowing down the descent speed of the piston 2 or making it hover.

[0040] Specifically, the drive unit involved in this application can also be configured as a winch wheel suspending the weight 3 to balance the weight of the weight 3 on the piston 2, thereby achieving the purpose of adjusting the output pressure of the weight 3 accumulator.

[0041] In a preferred embodiment, an annular groove is formed on the outer periphery of the piston body 21, and a sealing ring 22 is disposed in the annular groove; a lifting ring for connecting to the first connecting rope 64 is connected to the top of the piston body 21.

[0042] The sealing ring 22 includes a support ring 221, a pressure regulating support 222, and a sealing slip ring 223. The support ring 221 includes an upper support ring 221 and a lower support ring 221. The upper support ring 221 and the lower support ring 221 are connected to the upper and lower sides of the annular groove. The pressure regulating support 222 is disposed in the annular groove between the support ring 221 and the lower support ring 221. The sealing slip ring 223 is disposed between the pressure regulating support 222 and the accumulator cylinder body. The upper part of the sealing slip ring 223 is fixed by the upper support ring 221, and the lower part of the sealing slip ring 223 is fixed by the lower support ring 221.

[0043] Furthermore, an annular guide groove is provided on the lower outer periphery of the piston body 21, and a guide block is provided in the guide groove. The guide block has a conical structure, so that the direction of the conical angle is downward, ensuring that the high-pressure oil in the lower part uses the conical angle to automatically center the guide block, which is conducive to the downward movement of the piston 2 and prevents jamming.

[0044] In a preferred embodiment, a first inflation channel 7 is provided inside the piston body 21; a second inflation channel is provided in the upper support ring 221; an inflation hose 8 is provided in the first inflation channel 7, one end of the inflation hose 8 passes through the second inflation channel of the upper support ring 221 and is connected to the pressure regulating support tire 222, and the other end of the inflation hose 8 is connected to a first inflation port outside the accumulator cylinder body, which is used to connect to an external inflation mechanism.

[0045] It should be noted that the inflation mechanism is a nitrogen-filling cart or compressed air pipeline, etc. The purpose of setting up a nitrogen-filling cart or compressed air pipeline is to achieve low air cost, high nitrogen cost, and high pressure.

[0046] In a preferred embodiment, an airbag 4 is provided in the central groove 5 at the lower part of the piston 2, and a third inflation channel 14 connected to the airbag 4 is also provided in the piston body 21. One end of the third inflation channel 14 is connected to the middle part of the central groove 5 at the lower part of the piston 2, and a sealing ring 22 surface and threads are provided. A sealing rubber is provided around the inflation port of the airbag 4, and the sealing rubber corresponds to the sealing ring 22 surface. The threaded connection between the stud of the inflation port of the airbag 4 and the lower end of the third inflation channel 14 is made so that the sealing rubber and the sealing ring 22 surface are pressed together to form a sealing strip, preventing oil in the piston 2 cylinder from entering the interior of the third inflation channel 14. The other end of the third inflation channel 14 is connected to the inflation hose 8 of the airbag 4, and the other end of the inflation hose 8 of the airbag 4 is connected to a second inflation port outside the accumulator cylinder for inflating or deflating the airbag 4. The second inflation port is used to connect to an external nitrogen filling trolley.

[0047] Specifically, the second filling port is used to connect to an external nitrogen filling trolley. This nitrogen filling trolley, which relates to the field of nitrogen filling and pressurization devices, is a nitrogen filling device designed to improve nitrogen utilization efficiency. It addresses two scenarios: directly filling accumulators or high-pressure containers from nitrogen cylinders, or filling when the required nitrogen pressure is higher than the cylinder pressure and cannot be directly implemented. The nitrogen filling trolley consists of hydraulic, electrical, pneumatic, and nitrogen pressurization components. The trolley carries the nitrogen pressurization device, with push rods inside the end caps at both ends of the cylinder body, and limit switches at both ends of the oil and gas chambers. Piston 2 pushes the solenoid reversing valve of the limit switch via the push rod, sending a reversing signal. The hydraulic system pressurizes, causing piston 2 to reciprocate continuously, pressurizing the gas and inputting it into the pressure vessel until the required pressure is reached, at which point it automatically stops. If connected to the pneumatic system of the pressure vessel, it can automatically fill and maintain pressure.

[0048] In a preferred embodiment, at least one oil return channel 9 is provided inside the piston body 21; a recovery check valve 10 is connected inside the oil return channel 9 to ensure that the oil inside the accumulator cylinder does not flow back to the top of the piston body 21; the recovery check valve 10 has a preset back pressure to ensure that the oil above the piston 2 can provide lubrication to the sealing slip ring 223 through the gap between the piston 2 and the accumulator cylinder when the piston 2 is in the downward working state, instead of returning to the inside of the accumulator cylinder through the oil return channel 9; the recovery check valve 10 can open during the upward movement of the piston body 21 along the accumulator cylinder so that the oil above the piston 2 can return to the inside of the accumulator cylinder through the oil return channel 9, thereby preventing the emergence of vacuum bubbles or vapor bubbles generated by the upward suction of the piston 2 in the oil inside the accumulator cylinder; a filter screen or filter is connected to the upper end of the oil return channel 9;

[0049] The piston body 21 is also provided with an exhaust channel. A gas-liquid recovery ring groove is formed in a ring along the inner wall of the central groove 5 of the piston body 21 to fully absorb the gas in the central groove 5. The exhaust channel extends vertically along the piston body 21 to the gas-liquid recovery ring groove, so that the gas-liquid recovery ring groove is connected to the exhaust channel. An exhaust valve is connected above the exhaust channel.

[0050] Specifically, the exhaust valve can be submerged in the oil above the piston 2. During the upward movement of the piston body 21 along the accumulator cylinder, to prevent air above the piston 2 from entering the accumulator cylinder, a liquid level alarm is installed above the piston 2. When the oil level falls below a set lower threshold, the upward movement of the piston body 21 along the accumulator cylinder stops, ensuring sufficient oil above the piston 2 for suction during its upward movement, thus preventing air above the oil from entering the accumulator cylinder. An exhaust channel is provided inside the piston 2, and an exhaust valve is installed above the exhaust channel.

[0051] Specifically, when gas overflows from the system, it rises along the pipes and eventually accumulates at the highest point of the system. The vent valve is typically installed at this highest point. When gas enters the vent valve chamber and accumulates at the top, the pressure increases as more gas accumulates. When the gas pressure exceeds the system pressure, the gas causes the liquid level in the chamber to drop, causing the float to descend and open the vent. After the gas is exhausted, the liquid level rises, and the float rises, closing the vent. Similarly, when negative pressure occurs in the system, the liquid level in the valve chamber drops, and the vent opens. Since the external atmospheric pressure is higher than the system pressure, atmospheric air enters the system through the vent, preventing the harmful effects of negative pressure. Tightening the valve cap on the vent valve body stops the venting process; normally, the valve cap should be in the open position. The vent valve can also be used with an isolation valve for easier maintenance. The sealing end of the lever is spring-supported and extends and retracts with the lever's movement, ensuring a tight seal when no gas is being released. When installing the vent valve, it is best to install it together with the isolation valve. This way, when the vent valve needs to be removed for maintenance, the system can be kept sealed and the oil will not leak out.

[0052] Furthermore, an oil suction filter is connected to the upper end of the oil return channel 9, and a filter screen with a mesh size of 80 is connected in the oil suction filter.

[0053] The oil suction filter is used to block large particulate contaminants from entering the accumulator. It is installed at the confluence port at the upper end of the oil return channel 9 to prevent impurities or air bubbles suspended in the oil from entering the accumulator. The filter should be selected with coarse filtration accuracy and large flow capacity. Therefore, an 80-mesh filter screen is preferred.

[0054] The piston body 21 has symmetrically arranged counterweight 3 fixing grooves around the lifting ring on the upper part, and counterweight 3 of the same weight and volume are respectively arranged in the two side counterweight 3 fixing grooves; a liquid level alarm is installed at the outlet above the oil return channel 9, and the alarm threshold of the liquid level alarm is not higher than the filter screen above the oil return channel 9; the central groove 5 of the piston body 21 has a cavity facing the inside of the accumulator cylinder, and the air bag 4 is an inverted cone, which is set in the cavity of the piston body 21 to ensure that it does not abut against the surrounding wall of the cavity.

[0055] In a preferred embodiment, a piston position sensor 13 is provided on the accumulator cylinder; the piston position sensor 13 is located on the outside of the accumulator cylinder and does not contact the piston body 21; a sensing device that senses the piston position sensor 13 is provided on the piston body 21; the piston position sensor 13 is set with an alarm lower threshold and an alarm upper threshold.

[0056] By feeding back the liquid level data measured by the liquid level alarm on the piston body 21 to the drive unit, the drive unit adjusts the speed at which the piston 2 rises along the accumulator cylinder, preventing the piston 2 from rising too fast along the accumulator cylinder, which would cause the oil on the upper part of the piston 2 to be completely sucked in, and consequently the air on the upper part of the accumulator cylinder to be sucked in.

[0057] The piston position sensor 13 is preferably an external magnetic induction sensor. A sensor, such as a magnet, is installed on the piston 2 to sense the piston position sensor 13. The piston 2 sensor has an alarm lower threshold and an alarm upper threshold. The upper threshold ensures that the piston 2 does not exceed the set maximum movement position, preventing damage to the dust cover 12, airbag 4 inflation hose 8, etc. On the other hand, it ensures that the alarm upper threshold set by the level alarm exceeds the height of the counterweight 3, allowing the space above the piston 2 and the accumulator cylinder to store the returning oil without risking oil overflow from the second inflation port or the support tire inflation port. The piston position sensor 13 has an alarm lower threshold to ensure that there is a certain amount of oil at the bottom of the accumulator cylinder without touching the oil inlet, outlet, or supply port at the bottom of the accumulator cylinder. To ensure reliable sensor data, a redundant position trigger sensor can be set above the piston 2, and the lower threshold can be measured and controlled by the length of the second connecting rope 65.

[0058] In a preferred embodiment, a dust cover 12 is provided outside the accumulator cylinder body. A sealing ring 22 or a cable tie is provided at the connection between the dust cover 12 and the first connecting rope 64 to prevent dust from entering the upper part of the piston body 21 from between the dust cover 12 and the first connecting rope 64. Grooves or retaining rings are provided between the dust cover 12 and the outer wall of the accumulator cylinder body to fix the edge of the dust cover 12 to the outside of the accumulator cylinder body.

[0059] The dust cover 12 not only has a dustproof function, but also a waterproof and corrosion-resistant function. An air filter can also be installed on the dust cover 12 to ensure that the air above the piston 2 in the accumulator cylinder can flow freely and be filtered.

[0060] As a preferred embodiment, the lower edge of the accumulator cylinder body connected to the dust cover 12 is also connected to a fourth airflow channel. An air drying filter 11 is provided on the channel to ensure that the air above the piston body 21 inside the accumulator cylinder body can be filtered and dried by the air drying filter 11 before flowing through, preventing water vapor from entering the upper part of the piston 2.

[0061] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0062] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0063] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. An accumulator characterized by, The accumulator body includes an accumulator cylinder, the lower part of the accumulator cylinder is provided with an oil inlet interface, an oil outlet interface and an oil supply port, and the upper part of the accumulator cylinder is provided with a recovered oil port; the piston, the heavy hammer and the air bag are arranged in the accumulator cylinder; the heavy hammer is arranged above the piston; the air bag is arranged in the central groove of the lower part of the piston; the piston lifting device includes a driving unit and a pulley mechanism; the driving unit is connected with the pulley mechanism, and the pulley mechanism is connected with the piston, so that when the piston, the air bag and the heavy hammer jointly act, the function of the heavy hammer accumulator that the air bag assists to improve the pressure regulating reaction speed is realized; or when the driving unit, the pulley mechanism, the piston, the heavy hammer and the air bag jointly act, the function of the heavy hammer accumulator that the output pressure can be adjusted by the driving unit and the pressure regulating reaction speed can be assisted to improve by the air bag is realized. The piston includes a piston body, a sealing ring and a lifting ring; the sealing ring is arranged between the circumferential side of the piston body and the accumulator cylinder, and a pressure regulating support tire is arranged in the sealing ring; the movement friction resistance between the piston and the accumulator cylinder or the oil leakage amount of the sealing ring is controlled by adjusting the inflation pressure in the pressure regulating support tire. The upper part of the piston is provided with an oil storage space for storing leaked oil, and the stored oil can provide lubricating immersion for the sealing ring between the piston and the accumulator cylinder from the upper part, so as to reduce the friction and improve the flexibility and acceleration reaction capability of the overall up-and-down movement of the heavy hammer piston.

2. An accumulator as claimed in claim 1, wherein The pulley mechanism includes a first pulley, a second pulley, a third winding wheel, a first connecting rope and a second connecting rope. The central shaft of the first pulley is connected with the lifting ring on the piston through the first connecting rope; the central shaft of the second pulley is arranged above the first pulley, the second pulley is a fixed pulley, the third winding wheel is connected with the driving unit, one end of the second connecting rope is arranged on the central shaft of the second pulley or the fixed end of the second pulley, then the other end is wound on the third winding wheel after passing through the first pulley and the second pulley; The clutch and the brake device are arranged between the driving unit and the third winding wheel, the third winding wheel can be driven to rotate by the driving unit, so that the central shaft of the first pulley can be driven to move up and down by the second connecting rope, and then the first connecting rope and the piston can be driven to ascend along the accumulator cylinder or the descending speed of the piston can be controlled; the driving unit and the third winding wheel are separated or combined by the clutch; the third winding wheel slows down or stops moving by the brake device, and then the descending speed of the piston is slowed down or the piston is suspended.

3. An accumulator as claimed in claim 2, wherein An annular groove is formed in the outer periphery of the piston body, and the sealing ring is arranged in the annular groove; the lifting ring for connecting with the first connecting rope is connected to the top of the piston body. The sealing ring includes a support ring, a pressure regulating support tire and a sealing sliding ring; the support ring includes an upper support ring and a lower support ring; the upper support ring and the lower support ring are connected to the upper and lower sides of the annular groove; the pressure regulating support tire is arranged in the annular groove between the support ring and the lower support ring; the sealing sliding ring is arranged between the pressure regulating support tire and the accumulator cylinder, the upper part of the sealing sliding ring is fixed by the upper support ring, and the lower part of the sealing sliding ring is fixed by the lower support ring.

4. An accumulator as claimed in claim 3, wherein The first inflation channel is provided in the piston body; the second inflation channel is provided in the upper support ring; the first inflation channel is provided with an inflation hose, one end of the inflation hose passes through the second inflation channel of the upper support ring and is connected with the pressure regulating support tire, and the other end of the inflation hose is communicated to the first inflation port outside the accumulator cylinder body, and the first inflation port is used to be connected with the external inflation mechanism.

5. An accumulator as claimed in claim 3, wherein The air bag is arranged in the central groove of the lower part of the piston, and the third inflation channel connected with the air bag is further arranged in the piston body; one end of the third inflation channel is communicated to the middle part in the central groove of the lower part of the piston, and a sealing ring surface and a thread are arranged in the third inflation channel; the air bag is provided with a sealing rubber around the inflation port, the sealing rubber corresponds to the sealing ring surface, the sealing rubber and the sealing ring surface are pressed to form a sealing band through the thread connection between the stud of the air bag inflation port and the thread of the lower end of the third inflation channel, the oil in the piston cylinder is prevented from entering the inside of the third inflation channel, and the other end of the third inflation channel is communicated to the air bag inflation hose, the other end of the air bag inflation hose is communicated to the second inflation port outside the accumulator cylinder body for inflating or deflating the air bag, and the second inflation port is used to be connected with the external nitrogen charging trolley.

6. An accumulator as claimed in claim 3, wherein The piston body is further provided with at least one oil return channel; the oil return channel is internally connected with a recovery check valve, the recovery check valve is used to ensure that the oil in the accumulator cylinder body does not return to the upper part of the piston body; the recovery check valve has a preset back pressure, which can ensure that the oil above the piston can lubricate the sealing sliding ring between the piston and the accumulator cylinder body when the piston is in a downward working state, and the oil does not return to the inside of the accumulator cylinder body through the oil return channel; the recovery check valve can be opened during the upward movement of the piston body along the accumulator cylinder body, so that the oil above the piston returns to the inside of the accumulator cylinder body through the oil return channel, to prevent the emergence of vacuum bubbles or steam bubbles in the oil in the accumulator cylinder body due to the suction effect of the upward movement of the piston; the upper end of the oil return channel is connected with a filter screen or a filter; The piston body is further provided with an exhaust channel, and a gas-liquid recovery ring groove is annularly arranged on the inner wall of the central groove of the piston body, so as to fully absorb the gas in the central groove; the exhaust channel extends to the gas-liquid recovery ring groove in the vertical direction of the piston body, so that the gas-liquid recovery ring groove is communicated with the exhaust channel, and the upper part of the exhaust channel is connected with an exhaust valve.

7. An accumulator as claimed in claim 6, wherein The heavy hammer fixing grooves are symmetrically arranged around the lifting ring of the upper part of the piston body, and the same weight and volume heavy hammers are arranged in the heavy hammer fixing grooves on both sides; the liquid level alarm meter is arranged at the upper outlet of the oil return channel, and the alarm lower threshold of the liquid level alarm meter is not higher than the filter screen above the oil return channel; the central groove of the piston body is provided with a cavity facing the inside of the accumulator cylinder body, and the air bag is a inverted cone arranged in the cavity of the piston body, so as to ensure that the air bag does not abut against the peripheral wall of the cavity.

8. An accumulator as claimed in claim 7, wherein The piston position sensor is arranged on the accumulator cylinder body; the piston position sensor is arranged on the outside of the accumulator cylinder body and does not contact the piston body; the sensing device which is responsive to the piston position sensor is arranged on the piston body; the piston position sensor is provided with an alarm lower threshold and an upper threshold; The liquid level data measured by the liquid level alarm on the piston body is fed back to the driving unit, so that the driving unit adjusts the speed of the piston rising along the accumulator cylinder, prevents the piston upper oil from being completely sucked in due to the piston rising along the accumulator cylinder too fast, and further prevents the air in the upper part of the accumulator cylinder from being sucked in.

9. An accumulator as in claim 1 wherein, A dust cover is arranged outside the accumulator cylinder, a sealing ring or a cable tie is arranged at the connection between the dust cover and the first connecting rope to prevent dust from entering the upper part of the piston body from the space between the dust cover and the first connecting rope, and a groove or a clasp is arranged between the dust cover and the outer wall of the accumulator cylinder to fix the edge of the dust cover to the outer side of the accumulator cylinder.

10. An accumulator as claimed in claim 9, wherein The lower edge of the dust cover connected to the upper part of the accumulator cylinder is further connected to a fourth airflow channel, and an air drying filter is arranged on the channel to ensure that the air above the piston body in the accumulator cylinder and the dust cover can flow through the air drying filter after being filtered and dried, preventing water vapor from entering the upper part of the piston.

Images