A novel intelligent charging device and method for oil system accumulator

Abstract

A new type of intelligent charging device for oil system accumulator, comprising: a gas cylinder and a first manual stop valve, wherein the gas cylinder is connected to the accumulator through the first manual stop valve, and a pressure regulating switch and a one-way valve are sequentially arranged at the rear end of the first manual stop valve, wherein the one-way valve and the accumulator are connected through a connecting hose; a pressure gauge for monitoring the internal gas pressure of the accumulator is also arranged between the one-way valve and the accumulator; and a pressure relief module is also arranged between the one-way valve and the pressure gauge. The device can judge whether to charge / discharge according to the gas pressure in the accumulator, and will automatically stop charging / discharging after charging to the set pressure value. The operation is simple and the results are accurate. According to the instructions for use, personnel without any use experience can also operate it; the switch is automatically controlled according to the set value during the charging and discharging process, and no electronic components are introduced. The overall structure is simple, economical and practical.

Description

Technical Field

[0001] The invention belongs to the technical field of accumulators, and in particular relates to a novel intelligent charging device and method for an oil system accumulator. Background Art

[0002] Steam turbine units are large-scale machines that operate at high speeds. Their support bearings and thrust bearings require a large amount of lubricating oil for lubrication and cooling. Therefore, steam turbine units must have an oil supply system to ensure the normal operation of the above devices. In addition, the lubricating oil system can also provide low-pressure safety oil for the turbine unit speed control oil system. In order to ensure the pressure stability of the oil system, it is necessary to install an accumulator in the oil system pipeline. The accumulator is inflated before use. When the oil system pressure is greater than the air pressure in the accumulator, the accumulator airbag shrinks and the oil system pressure decreases. When the oil system pressure is less than the air pressure in the accumulator, the accumulator airbag expands and the oil system pressure rises. It is mainly used in the hydraulic control system of power plants. When the system operating conditions change, it plays a role in maintaining the system pressure. It is an auxiliary power source and absorption source.

[0003] Existing inflation devices generally include a manual shutoff valve, a venting valve, a pressure gauge, and several connecting hoses. The two ends of the hose can be clipped / buckled / screwed on the gas tank and the accumulator respectively. When inflating, the two ends of the hose are clipped on the accumulator and the gas tank respectively, and the pressure in the accumulator can be measured. Open the shutoff valve to start inflation, stop manually, and repeat reading and inflation until the required pressure is reached; if the pressure in the accumulator is higher than the required pressure, close the shutoff valve and open the venting valve to deflate.

[0004] The problems with this approach are:

[0005] (1) It is impossible to accurately judge how much gas pressure has been filled during the inflation operation. It is necessary to repeatedly read the pressure display and open the stop valve to inflate, relying entirely on experience and multiple experiments, which wastes time;

[0006] (2) During the inflation operation, since it is impossible to accurately judge how much gas pressure has been filled, the pressure gauge is often damaged due to excessive intake of gas, resulting in equipment loss and time waste;

[0007] (3) Due to the high pressure in the accumulator, it is easy to release all the gas in the accumulator during the deflation operation, and it is necessary to re-inflate it; relying solely on experience and multiple experiments to complete the inflation operation is a waste of time. Summary of the invention

[0008] In order to solve the above problems existing in the prior art, the purpose of the present invention is to provide a novel intelligent charging device and method for an oil system accumulator.

[0009] The present invention adopts the following technical solution:

[0010] A novel intelligent charging device for an oil system accumulator, comprising: an air tank and a first manual stop valve, wherein the air tank is connected to the accumulator via the first manual stop valve, the first manual stop valve being the main switch of the charging device, and being used to open or close the air tank before or after the air tank inflates the accumulator; a pressure regulating switch and a one-way valve are sequentially arranged at the rear end of the first manual stop valve; the pressure regulating switch is used to adjust the pressure of the air tank inflating the accumulator; the one-way valve is used to prevent gas from flowing back from the accumulator to the air tank during the charging process; the one-way valve is connected to the accumulator via a connecting hose; a pressure gauge for monitoring the internal gas pressure of the accumulator is also arranged between the one-way valve and the accumulator; a pressure relief module is also arranged between the one-way valve and the pressure gauge.

[0011] In the above technical solution, preferably, the pressure relief module includes a pressure relief valve and a second manual stop valve.

[0012] In the above technical solution, preferably, the pressure relief valve is arranged at the rear end of the second manual stop valve.

[0013] In the above technical solution, preferably, the second manual stop valve is connected to the connecting hose through a tee.

[0014] In the above technical solution, preferably, the pressure regulating switch includes an air inlet hose, a pressure regulating switch valve body, a pressure regulating switch adjustment mechanism, a pressure regulating switch adjustment spring, a pressure regulating switch pressure scale, an air outlet pipe, a connecting pipe and a pressure regulating switch valve core.

[0015] In the above technical solution, preferably, a pressure regulating switch valve core is arranged inside the pressure regulating switch valve body, and the pressure regulating switch valve core can move up and down in the pressure regulating switch valve body.

[0016] In the above technical solution, preferably, the air inlet hose and the air outlet pipe are respectively arranged at two ends of the pressure regulating switch valve body, and the air inlet hose is connected to the air storage tank, and the air outlet pipe is connected to the accumulator.

[0017] In the above technical solution, preferably, the air inlet hose and the air outlet pipe are both arranged above the pressure regulating switch valve core.

[0018] In the above technical solution, preferably, the bottom of the pressure regulating switch valve body is connected to the air outlet pipe through a connecting pipe.

[0019] In the above technical solution, preferably, a pressure regulating switch adjustment mechanism is provided on the top of the pressure regulating switch valve body.

[0020] In the above technical solution, preferably, a voltage regulating switch adjusting spring is arranged inside the voltage regulating switch adjusting mechanism.

[0021] In the above technical solution, preferably, the lower end of the pressure regulating switch adjusting spring is fixedly connected to the top end of the pressure regulating switch valve core.

[0022] In the above technical solution, preferably, a pressure regulating switch pressure scale is provided on one side of the pressure regulating switch adjustment mechanism.

[0023] In the above technical solution, preferably, the pressure relief valve includes a pressure relief pipe, a pressure relief valve body, a pressure relief valve adjustment mechanism, a pressure relief valve adjustment spring, a pressure relief valve core and an intake pipe.

[0024] In the above technical solution, preferably, a pressure relief valve core is arranged inside the pressure relief valve body, and the pressure relief valve core can move up and down in the pressure relief valve body.

[0025] In the above technical solution, preferably, the pressure relief pipe and the air intake pipe are respectively located on both sides of the pressure relief valve body, and the air intake pipe is connected to the accumulator.

[0026] In the above technical solution, preferably, the pressure relief pipe and the air intake pipe are both arranged below the valve core of the pressure relief valve.

[0027] In the above technical solution, preferably, a pressure relief valve adjustment mechanism is provided on the top of the pressure relief valve body.

[0028] In the above technical solution, preferably, a pressure relief valve adjustment spring is provided inside the pressure relief valve adjustment mechanism.

[0029] In the above technical solution, preferably, the lower end of the pressure relief valve adjusting spring is fixedly connected to the pressure relief valve valve core.

[0030] In the above technical solution, preferably, a pressure relief valve pressure scale is provided on one side of the pressure relief valve adjustment mechanism.

[0031] In the above technical solution, preferably, one side of the pressure scale of the pressure regulating switch and the pressure scale of the pressure relief valve are both length scales, and the other side are both pressure scales corresponding to the length scales.

[0032] A novel intelligent inflation method for an oil system accumulator is provided, wherein the inflation method is implemented using the above-mentioned inflation device.

[0033] In the above technical solution, preferably, the inflation method comprises the following steps:

[0034] Step 1: Connect the charging device to the accumulator, adjust the pressure regulating switch and the pressure relief valve to the predetermined scale, and open the first manual stop valve;

[0035] Step 2: Read the value of the pressure gauge. When the value of the pressure gauge is less than the preset pressure value, the gas storage tank charges the accumulator through the pressure regulating switch until the value of the pressure gauge is equal to the preset pressure value; when the value of the pressure gauge is greater than the preset pressure value, open the second manual stop valve so that the accumulator is depressurized through the pressure relief valve until the value of the pressure gauge is equal to the preset pressure value;

[0036] Step 3: Close the first manual stop valve and the second manual stop valve, and remove the inflation device.

[0037] Compared with the prior art, the present invention has the following beneficial effects:

[0038] (1) It can automatically judge whether to inflate according to the gas pressure in the accumulator, and automatically stop inflating when the pressure reaches the set value; the operation is simple and the results are accurate. According to the instructions, even personnel without any experience can operate it;

[0039] (2) It can automatically judge whether to deflate according to the gas pressure in the accumulator. After the pressure is released to the set pressure value, the deflation will automatically stop, and the gas in the accumulator will not be emptied all at once. The operation is simple and the results are accurate. According to the instructions, personnel without any use experience can also operate it;

[0040] (3) During the inflation and deflation process, the switch is automatically controlled according to the set value without introducing any electronic components. The overall structure is simple, economical and practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a system diagram of a novel intelligent charging device for an oil system accumulator of the present invention;

[0042] Figure 2 It is a structural schematic diagram of a pressure regulating switch in a novel intelligent charging device for an oil system accumulator of the present invention;

[0043] Figure 3 It is a top view of a pressure regulating switch in a novel intelligent charging device for an oil system accumulator of the present invention;

[0044] Figure 4 It is a structural schematic diagram of a pressure relief valve in a novel intelligent charging device for an oil system accumulator of the present invention;

[0045] Figure 5 It is a structural schematic diagram of a pressure scale in a novel intelligent charging device for an oil system accumulator of the present invention.

[0046] In the figure: 1-air storage tank; 2-first manual stop valve; 3-pressure regulating switch; 301-inlet hose; 302-pressure regulating switch valve body; 303-pressure regulating switch adjustment mechanism; 304-pressure regulating switch adjustment spring; 305-pressure regulating switch pressure scale; 306-air outlet pipe; 307-connecting pipe; 308-pressure regulating switch valve core; 4-check valve; 5-pressure relief valve; 501-pressure relief pipe; 502-pressure relief valve body; 503-pressure relief valve adjustment mechanism; 504-pressure relief valve adjustment spring; 505-pressure relief valve pressure scale; 506-pressure relief valve core; 507-inlet pipe; 6-pressure gauge; 7-energy accumulator; 8-connecting hose; 9-second manual stop valve. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical scheme and advantages of the present invention clearer, the technical scheme of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The embodiments described in this application are only part of the embodiments of the present invention, not all of them. Based on the spirit of the present invention, other embodiments obtained by ordinary technicians in this field without creative work are all within the scope of protection of the present invention.

[0048] Figure 1 This is a system diagram of a novel intelligent charging device for an oil system accumulator of the present invention, such as Figure 1 It is true that a novel intelligent charging device for an oil system accumulator of the present invention mainly includes an air storage tank 1 and a first manual stop valve 2.

[0049] The gas tank 1 is connected to the accumulator 7 via a first manual stop valve 2 . The first manual stop valve 2 is the main switch of the charging device, which is used to open or close the gas tank 1 before or after the gas tank 1 charges the accumulator 7 .

[0050] The rear end of the first manual stop valve 2 is also provided with a pressure regulating switch 3 and a one-way valve 4 in sequence. The pressure regulating switch 3 is used to adjust the pressure of the gas storage tank 1 charging the accumulator 7, and the one-way valve 4 is used to prevent the gas from flowing back from the accumulator 7 to the gas storage tank 1 during the charging process.

[0051] The one-way valve 4 and the accumulator 7 are connected via a connecting hose 8 .

[0052] A pressure gauge 6 for monitoring the internal gas pressure of the accumulator 7 is also provided between the one-way valve 4 and the accumulator 7 , and a pressure relief module is also provided between the one-way valve 4 and the pressure gauge 6 .

[0053] The pressure relief module includes a pressure relief valve 5 and a second manual stop valve 9 .

[0054] The pressure relief valve 5 is arranged at the rear end of the second manual stop valve 9, and the second manual stop valve 9 is connected to the connecting hose 8 through a three-way connection.

[0055] like Figure 2 As shown, the pressure regulating switch 3 includes an air inlet hose 301, a pressure regulating switch valve body 302, a pressure regulating switch adjustment mechanism 303, a pressure regulating switch adjustment spring 304, a pressure regulating switch pressure scale 305, an air outlet pipe 306, a connecting pipe 307 and a pressure regulating switch valve core 308.

[0056] A pressure regulating switch valve core 308 is disposed inside the pressure regulating switch valve body 302 , and the pressure regulating switch valve core 308 can move up and down in the pressure regulating switch valve body 302 .

[0057] The air intake hose 301 and the air outlet pipe 306 are respectively arranged at the two ends of the pressure regulating switch valve body 302, and the air intake hose 301 is connected to the air storage tank 1, and the air outlet pipe 306 is connected to the accumulator 7. The air intake hose 301 and the air outlet pipe 306 are both arranged above the pressure regulating switch valve core 308.

[0058] The bottom of the pressure regulating switch valve body 302 is connected to the air outlet pipe 306 through the connecting pipe 307 .

[0059] A pressure regulating switch adjustment mechanism 303 is arranged on the top of the pressure regulating switch valve body 302, a pressure regulating switch adjustment spring 304 is arranged inside the pressure regulating switch adjustment mechanism 303, the lower end of the pressure regulating switch adjustment spring 304 is fixedly connected to the top of the pressure regulating switch valve core 308, and a pressure regulating switch pressure scale 305 is arranged on one side of the pressure regulating switch adjustment mechanism 303.

[0060] like Figure 3 As shown, in order to prevent the pressure regulating switch adjusting spring 304 from clogging the gas passage, the pressure regulating switch adjusting mechanism 303 is arranged on one side of the gas passage of the device. At the same time, in order to ensure that the pressure regulating switch valve core 308 can move up and down smoothly in the pressure regulating switch valve body 302, a pressure regulating switch adjusting mechanism 303 is arranged on both sides of the gas passage respectively, and two pressure regulating switch pressure scales 305 are arranged accordingly.

[0061] The pressure regulating switch 3 adjusts the compression amount of the pressure regulating switch adjusting spring 304 to correspond to the gas pressure in the channel, thereby achieving the purpose of controlling whether the inflatable device needs to continue to be inflated. Its working principle is:

[0062] (1) First, by rotating the pressure regulating switch adjustment mechanism 303, the pressure regulating switch adjustment spring 304 is deformed. The elastic force of the pressure regulating switch adjustment spring 304 will push the pressure regulating switch valve core 308 to a corresponding distance, thereby opening the air inlet channel for inflation;

[0063] (2) When the pressure of the gas in the accumulator 7 reaches the set value, the gas in the connecting pipe 307 will cause the pressure regulating switch valve core 308 to move in the opposite direction and then reset, so that the air inlet passage is closed, thereby stopping the charging of the accumulator 7.

[0064] (3) The main function of the pressure scale 305 of the pressure regulating switch is to directly convert the deformation of the adjustment spring 304 into a predetermined pressure value for charging the accumulator 7, and to mark it on the pressure scale 305 of the pressure regulating switch, which is intuitive and convenient.

[0065] According to the conservation formula of force:

[0066] kx=PA

[0067] (k is the elastic coefficient, x is the deformation, P is the inflation pressure, and A is the cross-sectional area of ​​the valve core)

[0068] The original length of the pressure regulating switch adjustment spring 304 is recorded as L0, and a pressure regulating switch pressure scale 305 with a range of L0 is made and fixed on the pressure regulating switch valve body 302. According to the above-mentioned force conservation formula, the pressure values ​​corresponding to the compression of a certain deformation amount of the pressure regulating switch adjustment spring 304 are marked on the pressure regulating switch pressure scale 305. Each time the pressure regulating switch adjustment spring 304 is rotated inward by the pressure regulating switch adjustment mechanism 303, the pre-compression of the pressure regulating switch adjustment spring 304 can be achieved. As more gas is filled into the accumulator 7, the pressure inside it gradually increases. When the gas pressure in the accumulator 7 needs to reach a certain value, the pressure regulating switch adjustment mechanism 303 can be adjusted to the corresponding position on the pressure regulating switch pressure scale 305.

[0069] like Figure 4 As shown, the pressure relief valve 5 includes a pressure relief pipe 501 , a pressure relief valve body 502 , a pressure relief valve adjustment mechanism 503 , a pressure relief valve adjustment spring 504 , a pressure relief valve core 506 and an air intake pipe 507 .

[0070] A pressure relief valve core 506 is disposed inside the pressure relief valve body 502 , and the pressure relief valve core 506 can move up and down in the pressure relief valve body 502 .

[0071] The pressure relief pipe 501 and the air intake pipe 507 are respectively located on both sides of the pressure relief valve body 502 , and the air intake pipe 507 is connected to the accumulator 7 . The pressure relief pipe 501 and the air intake pipe 507 are both arranged below the pressure relief valve core 506 .

[0072] A pressure relief valve adjustment mechanism 503 is arranged on the top of the pressure relief valve body 502, a pressure relief valve adjustment spring 504 is arranged inside the pressure relief valve adjustment mechanism 503, the lower end of the pressure relief valve adjustment spring 504 is fixedly connected to the pressure relief valve core 506, and a pressure relief valve pressure scale 505 is arranged on one side of the pressure relief valve adjustment mechanism 503.

[0073] The pressure relief valve 5 achieves the purpose of controlling whether the accumulator 7 needs to continue to release gas by making the deformation of the pressure relief valve adjustment spring 504 correspond to the gas pressure in the channel. Its working principle is:

[0074] (1) By rotating the pressure relief valve adjustment mechanism 503, a deformation amount is given to the pressure relief valve adjustment spring 504 in advance. The elastic force of the pressure relief valve adjustment spring 504 will hold the pressure relief valve core 506, and the pressure relief channel is closed at this time.

[0075] (2) If the actual pressure of the gas in the accumulator 7 is lower than the set value of the pressure relief valve 5, the pressure relief channel remains closed and no pressure relief occurs.

[0076] (3) If the actual pressure of the gas in the accumulator 7 is higher than the set value of the pressure relief valve 5, this pressure is greater than the elastic force of the pressure relief valve adjusting spring 504, which will overcome the elastic force of the pressure relief valve adjusting spring 504 and push the pressure relief valve core 506 open, causing the gas in the accumulator 7 to leak out and the pressure to decrease; when the pressure drops to the set value of the pressure relief valve 5, the pressure relief valve core 506 is reset, the pressure relief channel is closed, and the accumulator 7 stops releasing pressure.

[0077] The main function and expression method of the pressure relief valve pressure scale 505 of the pressure relief valve 5 are the same as those of the pressure regulating switch 3.

[0078] like Figure 5 As shown, one side of the pressure scale 305 of the pressure regulating switch and the pressure scale 505 of the pressure relief valve are both length scales, and the other side are both pressure scales corresponding to the length scales.

[0079] A novel intelligent inflation method for an oil system accumulator is provided, and the inflation method is implemented using the above-mentioned inflation device.

[0080] The inflation method comprises the following steps:

[0081] Step 1: Connect the charging device to the accumulator 7, adjust the pressure regulating switch 3 and the pressure relief valve 5 to a predetermined scale, and open the first manual stop valve 2;

[0082] Step 2: Read the value of the pressure gauge 6. When the value of the pressure gauge 6 is less than the predetermined pressure value, the gas storage tank 1 charges the accumulator 7 through the pressure regulating switch 3 until the value of the pressure gauge 6 is equal to the predetermined pressure value; when the value of the pressure gauge 6 is greater than the predetermined pressure value, open the second manual stop valve 9 so that the accumulator 7 is depressurized through the pressure relief valve 5 until the value of the pressure gauge 6 is equal to the predetermined pressure value;

[0083] Step 3: Close the first manual stop valve 2 and the second manual stop valve 9, and remove the inflation device.

[0084] In step 2 of the method, the predetermined pressure value is the pressure value required by the lubricating oil system, and the reading of the pressure gauge 6 is the pressure in the accumulator 7. When the pressure in the accumulator 7 measured by the pressure gauge 6 is lower than the pressure required by the lubricating oil system, the connecting hose 8 needs to be connected to the gas storage tank 1 and the accumulator 7 respectively, and then the opening of the pressure regulating switch 3 is set to the opening corresponding to the pressure required by the lubricating oil system, and the stop valve 2 in front of the pressure regulating switch 3 is opened to inflate the accumulator 7. When the gas pressure in the accumulator 7 reaches the pressure required by the lubricating oil system, the pressure regulating switch 3 will automatically close and stop inflating.

[0085] When the pressure in the accumulator 7 measured by the pressure gauge 6 is higher than the pressure required by the lubricating oil system, the opening of the pressure relief valve 5 is set to the opening corresponding to the pressure required by the lubricating oil system, and the stop valve 2 in front of the pressure relief valve 5 is opened to release the pressure. After the pressure in the accumulator 7 drops to the pressure required by the lubricating oil system, the pressure relief valve 5 will automatically close and stop releasing the pressure.

[0086] Compared with the prior art, the present invention has the following beneficial effects:

[0087] (1) It can automatically judge whether to inflate according to the gas pressure in the accumulator, and automatically stop inflating when the pressure reaches the set value; the operation is simple and the results are accurate. According to the instructions, even personnel without any experience can operate it;

[0088] (2) It can automatically judge whether to deflate according to the gas pressure in the accumulator. After the pressure is released to the set pressure value, the deflation will automatically stop, and the gas in the accumulator will not be emptied all at once. The operation is simple and the results are accurate. According to the instructions, personnel without any use experience can also operate it;

[0089] (3) During the inflation and deflation process, the switch is automatically controlled according to the set value without introducing any electronic components. The overall structure is simple, economical and practical.

[0090] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. An intelligent charging device for an oil system accumulator, comprising: The gas storage tank (1) and the first manual stop valve (2) are characterized by: The gas storage tank (1) is connected to the accumulator (7) via a first manual stop valve (2). The first manual stop valve (2) is the main switch of the charging device and is used to open or close the gas storage tank (1) before or after the gas storage tank (1) charges the accumulator (7). A pressure regulating switch (3) and a one-way valve (4) are also provided in sequence at the rear end of the first manual stop valve (2); The pressure regulating switch (3) is used to adjust the pressure of the gas storage tank (1) charging the accumulator (7); The pressure regulating switch (3) comprises an air inlet hose (301), a pressure regulating switch valve body (302), a pressure regulating switch adjustment mechanism (303), a pressure regulating switch adjustment spring (304), a pressure regulating switch pressure scale (305), an air outlet pipe (306), a connecting pipe (307) and a pressure regulating switch valve core (308); A pressure regulating switch valve core (308) is arranged inside the pressure regulating switch valve body (302), and the pressure regulating switch valve core (308) is capable of moving up and down in the pressure regulating switch valve body (302); The air inlet hose (301) and the air outlet pipe (306) are respectively arranged at two ends of the pressure regulating switch valve body (302), and the air inlet hose (301) is connected to the air storage tank (1), and the air outlet pipe (306) is connected to the accumulator (7); The air inlet hose (301) and the air outlet pipe (306) are both arranged above the pressure regulating switch valve core (308); The bottom of the pressure regulating switch valve body (302) is connected to the air outlet pipe (306) via a connecting pipe (307); A pressure regulating switch adjustment mechanism (303) is provided on the top of the pressure regulating switch valve body (302); A voltage regulating switch adjusting spring (304) is arranged inside the voltage regulating switch adjusting mechanism (303); The lower end of the pressure regulating switch adjusting spring (304) is fixedly connected to the top end of the pressure regulating switch valve core (308); A pressure regulating switch pressure scale (305) is provided on one side of the pressure regulating switch adjustment mechanism (303); The one-way valve (4) is used to prevent gas from flowing back from the accumulator (7) to the gas storage tank (1) during the inflation process; The one-way valve (4) and the accumulator (7) are connected via a connecting hose (8); A pressure gauge (6) for monitoring the gas pressure inside the accumulator (7) is also provided between the one-way valve (4) and the accumulator (7); A pressure relief module is also provided between the one-way valve (4) and the pressure gauge (6), the pressure relief module comprising a pressure relief valve (5) and a second manual stop valve (9), the pressure relief valve (5) being provided at the rear end of the second manual stop valve (9); The pressure relief valve (5) comprises a pressure relief pipe (501), a pressure relief valve body (502), a pressure relief valve adjustment mechanism (503), a pressure relief valve adjustment spring (504), a pressure relief valve core (506) and an air intake pipe (507); a pressure relief valve core (506) is arranged inside the pressure relief valve body (502), and the pressure relief valve core (506) can move up and down in the pressure relief valve body (502); The pressure relief pipe (501) and the air intake pipe (507) are respectively located on two sides of the pressure relief valve body (502), and the air intake pipe (507) is connected to the accumulator (7); The pressure relief pipe (501) and the air intake pipe (507) are both arranged below the pressure relief valve core (506); A pressure relief valve adjustment mechanism (503) is provided on the top of the pressure relief valve body (502); A pressure relief valve adjustment spring (504) is arranged inside the pressure relief valve adjustment mechanism (503); The lower end of the pressure relief valve adjustment spring (504) is fixedly connected to the pressure relief valve core (506); A pressure relief valve pressure scale (505) is provided on one side of the pressure relief valve adjustment mechanism (503).

2. The intelligent charging device for an oil system accumulator according to claim 1, characterized in that: The second manual stop valve (9) is connected to the connecting hose (8) via a tee.

3. The intelligent charging device for an oil system accumulator according to claim 1, characterized in that: One side of the pressure regulating switch pressure scale (305) and the pressure relief valve pressure scale (505) are both length scales, and the other side are both pressure scales corresponding to the length scales.

4. An intelligent charging method for an oil system accumulator, characterized in that: The inflation method is implemented using the inflation device according to any one of claims 1 to 3; The inflation method comprises the following steps: Step 1: Connect the inflation device to the accumulator (7), adjust the pressure regulating switch (3) and the pressure relief valve (5) to a predetermined scale, and open the first manual stop valve (2); Step 2: reading the value of the pressure gauge (6); when the value of the pressure gauge (6) is less than a predetermined pressure value, the gas storage tank (1) charges the accumulator (7) through the pressure regulating switch (3) until the value of the pressure gauge (6) is equal to the predetermined pressure value; when the value of the pressure gauge (6) is greater than the predetermined pressure value, opening the second manual stop valve (9) so that the accumulator (7) is depressurized through the pressure relief valve (5) until the value of the pressure gauge (6) is equal to the predetermined pressure value; Step 3: Close the first manual stop valve (2) and the second manual stop valve (9) and remove the inflation device.

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