Rapid pressure balancing system

Abstract

The invention discloses a rapid pressure balancing system which comprises a gas supply station, a first energy accumulator, a second energy accumulator and a control valve set. The air pressure end of the first energy accumulator communicates with the air supply station, and the oil pressure end of the first energy accumulator is connected with the oil pressure end of the second energy accumulator and the oil tank through the control valve set. When the air pressure of the air supply station is larger than a set value, the first energy accumulator is suitable for enabling oil at the oil pressure end to flow back to the oil tank through the control valve set, so that the air supply station conducts air supply and pressure reduction on the first energy accumulator. And when the air pressure of the air supply station is smaller than a set value, the second energy accumulator supplements oil to the oil pressure end of the first energy accumulator through the control valve set, so that the first energy accumulator supplements air to the air supply station for pressurization. The air supply station has the beneficial effects that air is supplemented for normal work of the air supply station through air inflation of the first energy accumulator, it is guaranteed that the air supplementing process of the first energy accumulator is rapid through oil supplementing of the second energy accumulator to the first energy accumulator, and therefore it is guaranteed that the pressure fluctuation amplitude in the normal work process of the air supply station is greatly reduced.

Description

Technical Field

[0001] The present application relates to the field of hydraulic technology, and in particular to a rapid pressure balancing system. Background Art

[0002] The accumulator is a commonly used auxiliary component in the hydraulic system. The normal operation of the accumulator requires the pneumatic component to supplement the pressure to ensure the normal operation of the accumulator. For pneumatic components, a relatively stable air supply pressure is particularly important. Stable air supply pressure can not only ensure the stable working state of the pneumatic components, but also ensure that the pneumatic components have a long service life.

[0003] When supplying gas at existing gas supply stations, the pressure fluctuates within a certain range. The air compressor will only start to store gas when the pressure is lower than the preset value. When the pressure is higher than the preset value, the air storage will stop. Assuming that the gas consumption suddenly increases during a certain period of time, the gas storage speed of the air compressor cannot keep up with the gas release speed. This may cause the pressure in the gas tank to continue to be lower than the preset value, resulting in abnormal operation of the pneumatic components. Summary of the invention

[0004] One of the purposes of the present application is to provide a rapid pressure balancing system that can solve at least one of the defects in the above-mentioned background technology.

[0005] In order to achieve at least one of the above-mentioned purposes, the technical solution adopted in the present application is: a rapid pressure balancing system, comprising an air supply station, a first accumulator, a second accumulator and a control valve group; the air pressure end of the first accumulator is connected to the air supply station, and the oil pressure end of the first accumulator is connected to the oil pressure end of the second accumulator and the oil tank through the control valve group; when the air pressure of the air supply station is greater than a set value, the first accumulator is suitable for returning the oil at the oil pressure end to the oil tank through the control valve group, so that the air supply station replenishes air and reduces the pressure of the first accumulator; when the air pressure of the air supply station is less than the set value, the second accumulator replenishes oil to the oil pressure end of the first accumulator through the control valve group, so that the first accumulator replenishes air and increases the pressure of the air supply station.

[0006] Preferably, the control valve group includes a first cartridge valve, a second cartridge valve and a pilot valve; the oil pressure end of the first accumulator is connected to the oil tank through the first cartridge valve, the second accumulator is connected to the first accumulator through the second cartridge valve, and the pilot valve is connected to the first cartridge valve and the second cartridge valve respectively; when the air pressure of the gas supply station is greater than a set value, the pilot valve controls the first cartridge valve to open and controls the second cartridge valve to close; when the air pressure of the gas supply station is less than a set value, the pilot valve controls the first cartridge valve to close and controls the second cartridge valve to open.

[0007] Preferably, the control valve group further includes a servo valve, and the oil pressure end of the first accumulator is connected to the first cartridge valve and the second cartridge valve respectively through the servo valve.

[0008] Preferably, when the absolute value of the difference ΔP between the actual air pressure P1 of the gas supply station and the set value P is less than a set threshold, the control valve group is in an isolated state; when the absolute value of the difference ΔP between the actual air pressure P1 of the gas supply station and the set value P is greater than the set threshold, the control valve group performs pressure balancing work of the gas supply station.

[0009] Preferably, when the absolute value of ΔP is greater than a set threshold, the control signal U of the servo valve is: ; Among them, K p Represents the proportionality coefficient, K i represents the integration constant, K d represents the differential constant, and S represents the sampling period.

[0010] Preferably, the gas supply station includes an air tank and an air compressor; the air tank is connected to the air pressure end of the first accumulator, and the air compressor is used to inflate the air tank; before the air tank supplies air to the outside, the air compressor continues to inflate the air tank until the volume of the air pressure end of the first accumulator reaches a maximum.

[0011] Preferably, a pressure sensor is installed at the air pressure end of the first accumulator, and the pressure sensor is used to monitor the working air pressure of the air supply station; a first travel switch is installed at the oil pressure end of the first accumulator, and when the first travel switch is triggered, the volume of the air pressure end of the first accumulator reaches the maximum.

[0012] Preferably, the rapid pressure balancing system also includes an oil pump and a one-way valve; the input end of the oil pump is connected to the oil tank, and the output end of the oil pump is connected to the oil pressure end of the second accumulator through the one-way valve, so that the second accumulator is replenished with oil through the oil pump; the second accumulator is suitable for replenishing oil through the oil pump until the oil pressure end reaches the maximum volume before the air storage tank supplies air to the outside.

[0013] Preferably, a second travel switch is installed at the air pressure end of the second accumulator, and when the second travel switch is triggered, the oil pressure end of the second accumulator reaches a maximum volume.

[0014] Preferably, the rapid pressure balancing system further includes a controller, and the controller is respectively connected to the control valve group, the oil pump, the pressure sensor, the first travel switch and the second travel switch by signals.

[0015] Compared with the prior art, the beneficial effects of this application are: The normal operation of the gas supply station is replenished with air through the inflation of the first accumulator, and the oil replenishment of the first accumulator through the second accumulator ensures that the gas replenishment process of the first accumulator is rapid, thereby ensuring that the pressure fluctuation amplitude during the normal operation of the gas supply station is greatly reduced, so as to improve the gas supply stability of the gas supply station. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of this application.

[0017] In the figure: gas supply station 100, air compressor 101, gas storage tank 102, first accumulator 201, pressure sensor 202, first travel switch 203, second accumulator 204, second travel switch 205, servo valve 206, first cartridge valve 207, second cartridge valve 208, one-way valve 209, pilot valve 210, oil pump 211, oil tank 212, controller 300. DETAILED DESCRIPTION

[0018] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that in the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms should not be understood as necessarily being directed to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification.

[0019] In the description of the present application, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of narrating the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and cannot be understood as limiting the specific scope of protection of the present application.

[0020] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0021] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be connected, detachably connected, or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0023] The terms "including" and "having" and any variations thereof in the specification and claims of the present application are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0024] One of the preferred embodiments of the present application is as follows: Figure 1 As shown, a pressure rapid balancing system includes an air supply station 100, a first accumulator 201, a second accumulator 204 and a control valve group. The air pressure end of the first accumulator 201 is connected to the air supply station 100, and the oil pressure end of the first accumulator 201 is connected to the oil pressure end of the second accumulator 204 and the oil tank 212 through the control valve group. When the air pressure of the air supply station 100 is greater than the set value, the first accumulator 201 is suitable for returning the oil at the oil pressure end to the oil tank 212 through the control valve group, so that the air supply station 100 replenishes air to the first accumulator 201 and reduces the pressure. When the air pressure of the air supply station 100 is less than the set value, the second accumulator 204 replenishes oil to the oil pressure end of the first accumulator 201 through the control valve group, so that the first accumulator 201 replenishes air to the air supply station 100 and increases the pressure.

[0025] It is understandable that both the first accumulator 201 and the second accumulator 204 adopt a piston structure, that is, the first accumulator 201 and the second accumulator 204 form a two-end structure through a piston, one end of which is used to accommodate gas and the other end is used to accommodate oil, then the end accommodating gas is the gas pressure end, and the end accommodating oil is the oil pressure end. When the pressure at the gas pressure end is greater than the pressure at the oil pressure end, the piston will move toward the oil pressure end under the action of the gas pressure, thereby increasing the volume of the gas pressure end and reducing the volume of the oil pressure end; conversely, when the pressure at the gas pressure end is less than the pressure at the oil pressure end, the piston will move toward the gas pressure end under the action of the oil pressure, thereby reducing the volume of the gas pressure end and increasing the volume of the oil pressure end.

[0026] In the technical solution of this embodiment, the function of the first accumulator 201 is to achieve rapid pressure balance of the gas supply station 100 through the volume change of the gas pressure end. Since the pressure of the gas supply station 100 is always the same as that of the gas pressure end of the first accumulator 201, when the working pressure of the gas supply station 100 is greater than the set value, the oil at the oil pressure end of the first accumulator 201 can be discharged to increase the volume of the gas pressure end of the first accumulator 201. When the working pressure of the gas supply station 100 is less than the set value, the gas stored in the gas pressure end of the first accumulator 201 needs to be supplemented to the gas supply station 100 to increase its working pressure, that is, the gas pressure end volume of the first accumulator 201 needs to be reduced; correspondingly, the oil pressure end volume of the first accumulator 201 needs to be increased, that is, the oil pressure end of the first accumulator 201 needs to be supplemented with oil. If the traditional pump direct oil supply method is adopted, based on the response of the control valve group and the start-up of the pump, the first accumulator 201 will cause a lag in the response of the first accumulator 201 to the pressurization of the gas supply station 100. Therefore, in this embodiment, a second accumulator 204 is provided, and the second accumulator 204 is connected to the oil pressure end of the first accumulator 201, and can directly output oil to the first accumulator 201 when the working pressure of the gas supply station 100 is low, thereby effectively improving the air pressure compensation speed of the gas supply station 100. Compared with the traditional method, the technical solution of the present application can effectively reduce the pressure fluctuation amplitude of the gas supply station 100 during normal operation by providing the first accumulator 201 and the second accumulator 204, so as to improve the gas supply stability of the gas supply station 100.

[0027] It should be known that in order to ensure the pressure compensation speed of the first accumulator 201 to the gas supply station 100, the oil at the oil pressure end of the first accumulator 201 needs to be directly discharged to the oil tank 212, and the function of the second accumulator 204 is to supply oil only to the oil pressure end of the first accumulator 201. Then when the first accumulator 201 is draining oil, the control valve group needs to isolate the second accumulator 204 to prevent the oil in the second accumulator 204 from flowing to the first accumulator 201. At the same time, when the second accumulator 204 replenishes oil to the first accumulator 201, the connection between the first accumulator 201 and the oil tank 212 also needs to be isolated. There are many specific structures of the control valve group that can realize the above functions. For convenience, one of the structures will be described in detail below.

[0028] In this embodiment, Figure 1 As shown, the control valve group includes a first cartridge valve 207, a second cartridge valve 208 and a pilot valve 210. The oil pressure end of the first accumulator 201 is connected to the oil tank 212 through the first cartridge valve 207, the second accumulator 204 is connected to the first accumulator 201 through the second cartridge valve 208, and the pilot valve 210 is connected to the first cartridge valve 207 and the second cartridge valve 208 respectively. When the air pressure of the gas supply station 100 is greater than the set value, the pilot valve 210 controls the first cartridge valve 207 to open and controls the second cartridge valve 208 to close. When the air pressure of the gas supply station 100 is less than the set value, the pilot valve 210 controls the first cartridge valve 207 to close and controls the second cartridge valve 208 to open.

[0029] It should be known that the specific structures and working principles of the first cartridge valve 207 , the second cartridge valve 208 and the pilot valve 210 are well known to those skilled in the art; for ease of understanding, a detailed description will be given below.

[0030] Specifically, Figure 1 As shown, the input end of the first cartridge valve 207 is connected to the first accumulator 201, and the output end of the first cartridge valve 207 is connected to the oil tank 212. The input end of the second cartridge valve 208 is connected to the second accumulator 204, and the output end of the second cartridge valve 208 is connected to the input end of the first cartridge valve 207. The pilot valve 210 adopts a two-position four-way valve, including a parallel position and a cross position. The input end of the pilot valve 210 is connected to the second accumulator 204, and the output end of the pilot valve 210 is connected to the spring end of the first cartridge valve 207 and the second cartridge valve 208 respectively.

[0031] When the air pressure of the air supply station 100 is greater than the set value, the pilot valve 210 is in a cross-position conduction state. At this time, the second accumulator 204 is in a self-locking state through the second cartridge valve 208, that is, the second accumulator 204 cannot supply oil; at the same time, the spring end of the first cartridge valve 207 is connected to the oil tank 212, that is, there is no additional pressure on the spring end of the first cartridge valve 207, and then the oil discharged from the first accumulator 201 can open the first cartridge valve 207 and flow to the oil tank 212.

[0032] When the air pressure of the gas supply station 100 is less than the set value, the pilot valve 210 is in a parallel conduction state. At this time, part of the oil output by the second accumulator 204 can flow to the spring end of the first cartridge valve 207 to lock the first cartridge valve 207; at the same time, the spring end of the second cartridge valve 208 is connected to the oil tank 212, that is, there is no additional pressure on the spring end of the second cartridge valve 208, and then the oil output by the second accumulator 204 can open the second cartridge valve 208 and flow to the first accumulator 201.

[0033] In this embodiment, Figure 1 As shown, the control valve group further includes a servo valve 206, and the oil pressure end of the first accumulator 201 is connected to the first cartridge valve 207 and the second cartridge valve 208 respectively through the servo valve 206. Thus, the air pressure fluctuation of the gas supply station 100 is regulated by controlling the opening of the servo valve 206.

[0034] It is understandable that the opening of the first cartridge valve 207 and the second cartridge valve 208 cannot be controlled, so in the initial stage of the first accumulator 201 discharging oil and the second accumulator 204 supplying oil, the action response of the first accumulator 201 will be overshoot, which may affect the balancing effect of the first accumulator 201 on the pressure fluctuation of the gas supply station 100. Therefore, a servo valve 206 is provided in this embodiment, and by controlling the opening of the servo valve 206, the action response degree of the first accumulator 201 can be controlled, thereby improving the balancing effect of the first accumulator 201 on the pressure fluctuation of the gas supply station 100. The specific structure and working principle of the servo valve 206 are well-known technologies to those skilled in the art, so they will not be elaborated in detail here.

[0035] In this embodiment, Figure 1 As shown, the gas supply station 100 includes a gas storage tank 102 and an air compressor 101. The gas storage tank 102 is connected to the gas pressure end of the first accumulator 201 and is used to supply pressure to the outside; the air compressor 101 is used to inflate the gas storage tank 102. Before the gas storage tank 102 supplies gas to the outside, the air compressor 101 continues to inflate the gas storage tank 102 until the volume of the gas pressure end of the first accumulator 201 reaches the maximum, so as to ensure that the first accumulator 201 can have sufficient compression when performing gas pressure balance.

[0036] It is understandable that there are multiple ways to monitor the pressure of the gas supply station 100 and the pre-charge pressure of the first accumulator 201. For ease of understanding, one of the ways will be described in detail below.

[0037] Specifically, Figure 1 As shown, a pressure sensor 202 is installed at the air pressure end of the first accumulator 201. Since the air pressure end of the first accumulator 201 is interconnected with the gas storage tank 102 of the gas supply station 100, the working air pressure of the gas supply station 100 can be monitored by installing the pressure sensor 202 at the air pressure end of the first accumulator 201. A first travel switch 203 is installed at the oil pressure end of the first accumulator 201. When the first travel switch 203 is triggered, the volume of the air pressure end of the first accumulator 201 reaches the maximum; that is, the first travel switch 203 is installed at the port position of the oil pressure end.

[0038] It should be known that the specific working process of the pressure sensor 202 and the first travel switch 203 is a well-known technology to those skilled in the art, and thus will not be elaborated in detail here.

[0039] In this embodiment, Figure 1 As shown, the pressure rapid balancing system further includes an oil pump 211 and a one-way valve 209. The input end of the oil pump 211 is connected to the oil tank 212, and the output end of the oil pump 211 is connected to the oil pressure end of the second accumulator 204 through the one-way valve 209, so that oil is replenished to the second accumulator 204 through the oil pump 211. The second accumulator 204 can be replenished with oil through the oil pump 211 until the oil pressure end reaches the maximum volume before the air storage tank 102 supplies air to the outside.

[0040] It is understandable that the first accumulator 201 directly discharges the oil to the oil tank 212 when discharging the oil. As the air pressure balancing process of the first accumulator 201 continues, the amount of oil in the oil pressure end of the second accumulator 204 gradually decreases, which will affect the air pressure balancing process of the first accumulator 201 for the gas supply station 100. Therefore, in this embodiment, it is necessary to set an oil pump 211 to continuously replenish the oil of the second accumulator 204, and in order to ensure that the second accumulator 204 has a sufficient amount of replenished oil, the oil pump 211 can replenish the oil pressure end to the maximum volume state each time the oil is replenished.

[0041] Specifically, Figure 1 As shown, the air pressure end of the second accumulator 204 is equipped with a second travel switch 205. When the second travel switch 205 is triggered, the oil pressure end of the second accumulator 204 reaches the maximum volume; that is, the second travel switch 205 is installed at the port position of the air pressure end. The specific working process of the second travel switch 205 is a well-known technology for those skilled in the art, so it will not be elaborated in detail here.

[0042] In this embodiment, Figure 1 As shown, the pressure rapid balancing system further includes a controller 300 , which is respectively connected to the servo valve 206 , the pilot valve 210 , the oil pump 211 , the pressure sensor 202 , the first travel switch 203 and the second travel switch 205 of the control valve group for signal connection.

[0043] Specifically, before the gas supply station 100 is not working, the controller 300 can control the servo valve 206 to be in a closed state, and the controller 300 can also control the pilot valve 210 to be in a cross-position conduction state. Then the controller 300 can notify the oil pump 211 to start, so that the oil output by the oil pump 211 can flow to the second accumulator 204 for oil replenishment. At this time, part of the oil output by the second cartridge valve 208 through the oil pump 211 is in a closed and locked state. At the same time, the gas supply station 100 can charge the gas storage tank 102 through the air compressor 101.

[0044] When the first travel switch 203 corresponding to the first accumulator 201 and the second travel switch 205 corresponding to the second accumulator 204 are both triggered, the controller 300 can receive the trigger signal and determine that the first accumulator 201 and the second accumulator 204 have completed the preparatory work, and then start the air pressure balancing work of the gas supply station 100. During the entire process of the first accumulator 201 achieving air pressure balancing of the gas supply station 100, the controller 300 can determine the actual working air pressure of the gas supply station 100 according to the data of the pressure sensor 202, and control the opening of the servo valve 206 and the conduction position of the pilot valve 210 according to the difference between the actual working air pressure of the gas supply station 100 and the set value.

[0045] It should be noted that the specific structure and working principle of the controller 300 are well known to those skilled in the art, and therefore will not be elaborated in detail herein. The controller 300 controls the opening of the servo valve 206 using a PID control method.

[0046] In this embodiment, when the absolute value of the difference ΔP between the actual air pressure P1 of the gas supply station 100 and the set value P is less than the set threshold, the control valve group is in an isolated state; when the absolute value of the difference ΔP between the actual air pressure P1 of the gas supply station 100 and the set value P is greater than the set threshold, the control valve group performs pressure balancing work of the gas supply station 100.

[0047] It is understandable that if the threshold for starting the air pressure balance is not set, the air pressure balance will be started when the actual air pressure P1 of the air supply station 100 is slightly greater than or less than the set value P, which will cause the air supply station 100 to perform multiple air pressure balance processes in a short period of time, which will not only increase the amount of data calculation, but also increase the wear of each hydraulic component. It should be known that the specific value of the threshold can be selected according to the actual needs of those skilled in the art.

[0048] Specifically, when the absolute value of the difference ΔP between the actual air pressure P1 of the gas supply station 100 and the set value P is less than the set threshold, the servo valve 206 will be in a closed state, thereby achieving isolation. When the absolute value of ΔP is greater than the set threshold, the control signal U of the servo valve 206 is: .

[0049] Among them, K p Represents the proportionality coefficient, K i represents the integration constant, K d represents the differential constant, and S represents the sampling period.

[0050] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and the specification only describe the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application, and these changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the attached claims and their equivalents.

Claims

1. A rapid pressure balancing system, characterized in that: It includes an air supply station, a first accumulator, a second accumulator and a control valve group; the air pressure end of the first accumulator is connected to the air supply station, and the oil pressure end of the first accumulator is connected to the oil pressure end of the second accumulator and the oil tank through the control valve group; When the air pressure of the air supply station is greater than a set value, the first accumulator is suitable for returning the oil at the oil pressure end to the oil tank through the control valve group, so that the air supply station replenishes air and reduces the pressure of the first accumulator; When the air pressure of the air supply station is less than a set value, the second accumulator replenishes oil to the oil pressure end of the first accumulator through the control valve group, so that the first accumulator replenishes air and increases the pressure to the air supply station.

2. The rapid pressure balancing system according to claim 1, characterized in that: The control valve group comprises: a first cartridge valve; the oil pressure end of the first accumulator is connected to the oil tank through the first cartridge valve; a second cartridge valve; the second accumulator is connected to the first accumulator via the second cartridge valve; and A pilot valve; the pilot valve is connected to the first cartridge valve and the second cartridge valve respectively; When the air pressure of the air supply station is greater than a set value, the pilot valve controls the first cartridge valve to open and controls the second cartridge valve to close; When the air pressure of the air supply station is less than a set value, the pilot valve controls the first cartridge valve to close, and controls the second cartridge valve to open.

3. The rapid pressure balancing system according to claim 2, characterized in that: The control valve group further includes a servo valve, and the oil pressure end of the first accumulator is connected to the first cartridge valve and the second cartridge valve respectively through the servo valve.

4. The rapid pressure balancing system according to claim 3, characterized in that: When the absolute value of the difference ΔP between the actual air pressure P1 of the air supply station and the set value P is less than the set threshold, the control valve group is in an isolated state; When the absolute value of the difference ΔP between the actual air pressure P1 of the air supply station and the set value P is greater than a set threshold, the control valve group performs pressure balancing work of the air supply station.

5. The rapid pressure balancing system according to claim 4, characterized in that: When the absolute value of ΔP is greater than the set threshold, the control signal U of the servo valve is: ； Among them, K p Represents the proportionality coefficient, K i represents the integration constant, K d represents the differential constant, and S represents the sampling period.

6. The rapid pressure balancing system according to any one of claims 1 to 5, characterized in that: The gas supply station includes an air tank and an air compressor; the air tank is connected to the air pressure end of the first accumulator, and the air compressor is used to inflate the air tank; before the air tank supplies air to the outside, the air compressor continues to inflate the air tank until the volume of the air pressure end of the first accumulator reaches a maximum.

7. The rapid pressure balancing system according to claim 6, characterized in that: A pressure sensor is installed at the air pressure end of the first accumulator, and the pressure sensor is used to monitor the working air pressure of the air supply station; The oil pressure end of the first accumulator is equipped with a first travel switch. When the first travel switch is triggered, the volume of the air pressure end of the first accumulator reaches the maximum.

8. The rapid pressure balancing system according to claim 7, characterized in that: The rapid pressure balancing system also includes an oil pump and a one-way valve; the input end of the oil pump is connected to the oil tank, and the output end of the oil pump is connected to the oil pressure end of the second accumulator through the one-way valve, so that the second accumulator is replenished with oil through the oil pump; the second accumulator is suitable for replenishing oil through the oil pump until the oil pressure end reaches a maximum volume before the air storage tank supplies air to the outside.

9. The rapid pressure balancing system according to claim 8, characterized in that: The air pressure end of the second accumulator is equipped with a second travel switch. When the second travel switch is triggered, the oil pressure end of the second accumulator reaches the maximum volume.

10. The rapid pressure balancing system according to claim 9, characterized in that: The rapid pressure balancing system further includes a controller, which is respectively connected to the control valve group, the oil pump, the pressure sensor, the first travel switch and the second travel switch by signals.

Images