Gas storage and delivery control method and system for cylinder

Abstract

The present application relates to the field of industrial automation technology, and specifically to an air storage and air delivery control method and system for air cylinders. The air storage and air delivery control method provided by the present application realizes precise air pressure management of the lifting cylinder through the coordinated control of a multi-stage air storage tank and a boosting component. In the ascending condition, the gas pressure is boosted by the boosting component and then delivered to the second air storage tank to provide thrust for the lifting cylinder, significantly reducing the driving load of the servo motor in the ascending stage. In the descending condition, the pressure-maintaining gas in the second air storage tank is used to apply a controllable thrust to the lifting rod to cushion the descent impact and reduce the load of the servo motor when descending. The pressure range is automatically switched dynamically according to the ascending / descending conditions, with high pressure assisting during ascent and releasing the pressure to a lower pressure to act as a buffer during descent. The air circuit is automatically disconnected and the pressure is maintained during sleep, retaining the air pressure reserve for quick activation next time.

Description

Technical Field

[0001] The present application relates to the field of industrial automation technology, and in particular to a gas storage and delivery control method and system for a gas cylinder. Background Art

[0002] In the field of industrial automation, there are significant technical bottlenecks in the lifting mechanism of large multi-station three-dimensional pneumatic cylinders and servo motors. Traditional air supply systems use a single air source for direct air supply or a simple air tank buffer design, which causes the servo motor to bear excessive loads during the lifting process, resulting in high energy consumption and difficulty in ensuring smooth movement. Specifically, there is a lack of effective air pressure assistance during the ascent phase, and the motor needs to output power in full; there is insufficient buffering during descent, which is prone to impact vibration; the air pressure supply is disconnected from the real-time working conditions and cannot be dynamically adjusted according to parameters such as speed and stroke. Although existing technologies have attempted to improve this through fixed boost or mechanical damping, they generally have problems such as poor adaptability, delayed response, and complex structure, making it difficult to meet the high-precision and high-efficiency modern production needs. In particular, for application scenarios such as large multi-station stamping equipment, there is an urgent need for a control method that can intelligently match air pressure output and motion characteristics to reduce the load on the servo motor and improve the overall performance of the system. Summary of the Invention

[0003] In view of this, the present application provides a gas storage and delivery control method and system for a cylinder, which can intelligently match the control method of air pressure output and motion characteristics to reduce the servo motor load and improve the overall performance of the system.

[0004] In the first aspect, the present application provides a gas storage and air supply control method for a cylinder, which is applied to a lifting cylinder air supply device of an auxiliary lifting servo motor, wherein the lifting cylinder air supply device includes an air source, a first air tank, a boosting component and a second air tank connected in sequence, and the second air tank is connected to the lifting cylinder. The method includes: controlling the air source to input gas to the first air tank until a first set pressure range is reached; when the lifting cylinder is in a commanded lifting condition, controlling the boosting component to connect the first air tank and the second air tank and perform boosting until the second air tank reaches a second set pressure range, and controlling the The second air storage tank is connected to the lifting cylinder; when the lifting cylinder is in a commanded descending condition, the second air storage tank is controlled to be connected to the lifting cylinder, the second air storage tank is controlled to release pressure to a third set pressure range, and the boost component is controlled to be closed and the air pressure of the second air storage tank is monitored; when the lifting cylinder is in a commanded descending condition, if the air pressure of the second air storage tank exceeds the third set pressure range, pressure relief is performed until it returns to the third set pressure range; and if the lifting cylinder stops working for more than a first preset time, the boost component is controlled to be closed, and the second air storage tank is controlled to be disconnected from the lifting cylinder.

[0005] In combination with the first aspect, in a possible implementation, when the lifting cylinder is in a commanded lifting condition, the boosting assembly is controlled to connect the first air tank and the second air tank and perform boosting until the second set pressure range is reached in the second air tank, and the second air tank is controlled to be connected to the lifting cylinder, including: obtaining a lifting instruction, and obtaining a corresponding lifting stroke according to the lifting instruction; if the lifting stroke is less than or equal to the first stroke, the boosting assembly is controlled to perform boosting with a first boosting multiple; if the lifting stroke is greater than the first stroke and less than or equal to the second stroke, the boosting assembly is controlled to perform boosting with a second boosting multiple; and if the lifting stroke is greater than the second stroke, the boosting assembly is controlled to perform boosting with a third boosting multiple; wherein, the second stroke is greater than the first stroke, the third boosting multiple is greater than the second boosting multiple, and the second boosting multiple is greater than the first boosting multiple.

[0006] In combination with the first aspect, in a possible implementation, the method further includes: when the lifting cylinder is in a commanded lifting condition: if the air pressure in the first air tank drops to a fourth set pressure range, monitoring the air pressure change of the second air tank during the process of the boosting component performing the boosting; if the reduction amplitude of the second air tank is greater than the preset amplitude, controlling the boosting component to increase the boosting ratio; and controlling to increase the input rate of gas from the gas source to the first air tank; wherein, the fourth set pressure range is smaller than the first set pressure range.

[0007] In combination with the first aspect, in a possible implementation, when the lifting cylinder is in a commanded rising condition, the boosting assembly is controlled to connect the first air tank and the second air tank and perform boosting until the second set pressure range is reached in the second air tank, and the second air tank is controlled to be connected to the lifting cylinder, including: obtaining a corresponding real-time rising speed according to the rising instruction in the commanded rising condition; and matching a corresponding boosting ratio according to the real-time rising speed, and controlling the boosting assembly to perform boosting according to the boosting ratio; wherein the boosting ratio is proportional to the real-time rising speed.

[0008] In combination with the first aspect, in a possible implementation, the second air storage tank is provided with a second pressure relief valve; wherein, when the lifting cylinder is in the commanded descent condition, if the air pressure of the second air storage tank exceeds the third set pressure range, pressure relief is performed until it returns to the third set pressure range, including: obtaining the real-time descent speed of the commanded descent condition; if the air pressure of the second air storage tank exceeds the third set pressure range, opening the second pressure relief valve; matching the second opening of the second pressure relief valve according to the real-time descent speed, the second opening being inversely proportional to the real-time descent speed; and if the air pressure of the second air storage tank returns to the third set pressure range, closing the second pressure relief valve.

[0009] In combination with the first aspect, in a possible implementation, the first air storage tank is provided with a first drain valve, and the second air storage tank is provided with a second drain valve; wherein, the air storage and air supply control method for the cylinder also includes: regularly opening the first drain valve and the second drain valve to perform drainage.

[0010] In combination with the first aspect, in a possible implementation, it also includes: when the lifting cylinder is in an abnormal descending condition, controlling the boosting assembly to connect the first air tank and the second air tank and perform boosting, so that the second air tank is maintained within a fourth set pressure range, and controlling the second air tank to be connected to the lifting cylinder; wherein, the fourth set pressure range is greater than or equal to the second set pressure range, the real-time descent speed corresponding to the abnormal descent condition is greater than the real-time descent speed corresponding to the instructed descent condition, or the real-time descent speed corresponding to the abnormal descent condition has a change amplitude greater than the preset speed variation within a unit reference time.

[0011] In combination with the first aspect, in a possible implementation, the second air storage tank is provided with a second pressure relief valve; the air storage and air supply control method for the cylinder also includes: when the lifting cylinder is in a fine-tuning working condition, controlling the boosting assembly and the second pressure relief valve to work together to maintain the second air storage tank within a fifth set pressure range; the fifth set pressure range is smaller than the second set pressure range; closing the boosting assembly; and controlling the second air storage tank to be connected to the lifting cylinder.

[0012] In combination with the first aspect, in a possible implementation, when the lifting cylinder is in the fine-tuning working condition, controlling the boosting assembly and the second pressure relief valve to work together to maintain the second air storage tank within the fifth set pressure range includes: when the lifting cylinder is in the fine-tuning working condition, detecting the air pressure of the second air storage tank; if the air pressure of the second air storage tank is less than the fifth set pressure range, controlling the second pressure relief valve to close, and controlling the boosting assembly to connect the first air storage tank and the second air storage tank and perform boosting until the second air storage tank reaches the fifth set pressure range; if the air pressure of the second air storage tank is greater than the fifth set pressure range, controlling the boosting assembly to close, and controlling the second pressure relief valve to open until the second air storage tank reaches the fifth set pressure range.

[0013] In the second aspect, the present application provides an air storage and air supply control system for a cylinder, which is applied to a lifting cylinder air supply device of an auxiliary lifting servo motor. The lifting cylinder air supply device includes an air source, a first air tank, a boosting component and a second air tank connected in sequence, and the second air tank is connected to the lifting cylinder. The system includes: a first air tank air pressure control module, configured to: control the air source to input gas to the first air tank until a first set pressure range is reached; an ascending control module, configured to: when the lifting cylinder is in a commanded ascending condition, control the boosting component to connect the first air tank and the second air tank and perform boosting until the second air tank reaches a second set pressure range, and control Control the second air tank to be connected with the lifting cylinder; a descent control module, configured to: when the lifting cylinder is in a commanded descent condition, control the second air tank to be connected with the lifting cylinder, control the second air tank to release pressure to a third set pressure range, and control the boost component to close and monitor the air pressure of the second air tank; when the lifting cylinder is in a commanded descent condition, if the air pressure of the second air tank exceeds the third set pressure range, perform pressure relief until it returns to the third set pressure range; and a shutdown module, configured to: if the lifting cylinder stops working for more than a first preset time, control the boost component to close, and control the second air tank to be disconnected from the lifting cylinder.

[0014] The gas storage and delivery control method and system provided in this application have the following beneficial effects:

[0015] (1) The present invention realizes precise air pressure management of the lifting cylinder through the coordinated control of the multi-stage air tank and the boosting component. In the ascending condition, the gas pressure is boosted by the boosting component and then delivered to the second air tank to provide thrust for the lifting cylinder, significantly reducing the driving load of the servo motor in the ascending stage; in the descending condition, the pressure-maintaining gas in the second air tank is used to apply controllable thrust to the lifting rod to cushion the descent impact and reduce the load of the servo motor during descent; the pressure range is automatically switched according to the ascending / descending conditions, with high pressure assisting during ascent and pressure relief to a lower pressure during descent to act as a buffer, and real-time monitoring and pressure relief are carried out to ensure that the air pressure is stable within the third set range during descent to prevent descent resistance caused by overpressure; the air circuit is automatically disconnected and pressure is maintained during dormancy to reduce energy loss, while retaining air pressure reserves for quick activation next time;

[0016] (2) The present invention selects different boosting modes according to the stroke length: a lower boosting ratio is used for a shorter stroke, a medium boosting ratio is used for a medium stroke, and a higher boosting ratio is used for a longer stroke; this graded boosting method can provide just the right air pressure support for different lifting requirements, which not only avoids energy waste but also ensures the smoothness of the lifting process. This intelligent pressure regulation mechanism can also extend the service life of pneumatic components and reduce unnecessary mechanical wear. It is particularly suitable for use in automated production scenarios where the lifting stroke changes frequently, such as automobile parts stamping production lines; the entire control process achieves a precise match between air pressure output and actual working conditions, which not only optimizes energy efficiency but also improves the overall performance of the system;

[0017] (3) The present invention also introduces a speed-pressure linkage control mechanism. When the system receives an ascending instruction, it not only determines the stroke length, but also dynamically matches the optimal boost ratio according to the real-time ascending speed required by the instruction. When rapid ascent is required, the system automatically adopts a higher boost ratio to provide stronger thrust support for the cylinder, ensuring that the servo motor can still maintain a stable load under high-speed conditions; conversely, when ascending at low speed, the boost ratio is reduced to avoid energy waste or mechanical shock caused by excess air pressure; this on-demand adjustment method accurately matches the air pressure output with the movement speed, which not only meets the power requirements under different working conditions, but also optimizes the overall energy efficiency performance. In particular, in automated production lines that require variable speed movement, this control method can adapt to speed changes in real time, always maintain the best air pressure assistance effect, effectively improve the system response speed and stability, and reduce the operating load of the servo motor at the same time;

[0018] (4) The present invention introduces a speed-adaptive pressure relief control mechanism. When the system detects the descent condition, it will monitor the current descent speed in real time and intelligently adjust the opening of the second pressure relief valve accordingly. This dynamic adjustment achieves a precise match between the air pressure buffer force and the real-time descent speed, forming a closed-loop control effect. In the specific implementation, the physical properties of the lifting rod back pressure gas are utilized to adjust the system damping by controlling the pressure relief speed, thereby achieving a softer linear deceleration effect. In practical applications, this intelligent buffer mechanism can effectively prevent impact vibration during heavy-load descent, protect the safety of the equipment, reduce the braking load of the servo motor, and extend the service life of the transmission system. The lifting mechanism can maintain an ideal descent curve under different load conditions, significantly improving the operating quality and reliability of the equipment.

[0019] (5) The present invention introduces a precise pressure control mechanism under fine-tuning working conditions, and the system will start a special pressure management mode: by coordinating the control of the boost component and the second pressure relief valve, the pressure of the second air tank is stabilized within the fifth set range lower than the normal working pressure; this low-pressure holding mode can provide a softer buffer thrust support for the lifting cylinder and provide a certain support force for the lifting cylinder to perform fine-tuning lifting; this control method is particularly suitable for working scenarios that require high-precision positioning, such as precision assembly or inspection stations, and can effectively eliminate the "creeping" or "shaking" phenomenon that is easy to occur in traditional air pressure systems during fine-tuning; by reducing the working pressure, the system obtains smoother motion characteristics and finer control resolution, while reducing energy consumption and equipment wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The figure shows a schematic diagram of the method steps of a gas storage and delivery control method for a cylinder provided by one embodiment of the present application.

[0021] Figure 2 Shown is a schematic diagram of a lifting cylinder air supply device provided in one embodiment of the present application.

[0022] Figure 3 Shown is a schematic diagram of a boost assembly provided in one embodiment of the present application.

[0023] Figure 4 The figure shows a schematic diagram of the steps of a method for controlling the boost multiple according to the rising stroke.

[0024] Figure 5 The figure shows a schematic diagram of the control steps when air pressure oscillation occurs in the second air storage tank.

[0025] Figure 6 The figure shows a schematic diagram of the steps of a method for controlling the boost multiple according to the real-time rising speed.

[0026] Figure 7The figure shows a schematic diagram of the steps of a method for controlling the pressure relief opening according to the real-time descent speed.

[0027] Figure 8 The figure shows a schematic diagram of the pressure control steps during abnormal descent conditions.

[0028] Figure 9 The figure shows the schematic diagram of pressure control steps during fine-tuning working conditions.

[0029] Figure 10 Schematic diagram of the air pressure control steps for the second air tank during fine-tuning working conditions.

[0030] Figure 11 Shown is a schematic diagram of the system structure of the air storage and air delivery control system for the cylinder. DETAILED DESCRIPTION

[0031] The following will be combined with the accompanying drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of this application.

[0032] An exemplary gas storage and delivery control method for a cylinder is as follows:

[0033] Figure 1 The figure shows a schematic diagram of the method steps of a gas storage and delivery control method for a cylinder provided by one embodiment of the present application. Figure 2 The figure shows a schematic diagram of a lifting cylinder air supply device provided by an embodiment of the present application. The present application provides a gas storage and air supply control method for a cylinder, which is applied to a lifting cylinder air supply device of an auxiliary lifting servo motor, referring to Figure 2 The lifting cylinder air supply device includes an air source 1, a first air tank 2, a booster assembly 3, and a second air tank 4, which are connected in sequence. The booster assembly includes an electronically controlled booster valve. The second air tank 4 is connected to the lifting cylinder 5. The lifting cylinder 5 and the servo motor are both assembled on the lifting mechanism, and the servo motor is mainly used to drive the lifting platform to move up and down.

[0034] In one embodiment, if Figure 1 As shown, the gas storage and delivery control method for the cylinder includes:

[0035] Step 110: Control the gas source 1 to input gas into the first gas storage tank 2 until the pressure reaches a first set pressure range.

[0036] In this step, the gas source 1 inflates the first gas tank 2 so that the first gas tank 2 has a certain gas pressure for use by the second gas tank 4 .

[0037] When the lifting cylinder 5 is in the commanded ascending condition, step 120 is executed, the boosting assembly 3 is controlled to connect the first air storage tank 2 and the second air storage tank 4 and perform boosting until the second set pressure range is reached in the second air storage tank 4, and the second air storage tank 4 is controlled to be connected to the lifting cylinder 5.

[0038] In this step, the processor instructs the lifting condition to be executed, i.e., controls the lifting platform to perform the lifting action. The second set pressure range is set according to the power assistance requirement. For example, in the air pressure circuit of the large multi-station three-dimensional lifting cylinder in the automated production line of automobile parts stamping, the first set pressure range of the first gas tank 2 is generally set to 0.5~0.6Mpa, and correspondingly, the second set pressure range of the second gas tank 4 is generally set to 1~1.2Mpa. The gas in the first gas tank 2 is pressurized by the boosting component 3 and then delivered to the second gas tank 4. The boosting multiple can be set to 2 times. The air pressure in the second gas tank 4 is delivered to the lifting cylinder 5. The air pressure in the second gas tank 4 applies a certain thrust to the lifting rod of the lifting cylinder 5, thereby assisting the servo motor to perform the lifting and reducing the lifting drive load of the servo motor. The second set pressure range can be set according to the power assistance requirement of the lifting cylinder to the servo motor. The higher the power assistance requirement, the larger the second set pressure range.

[0039] When the lifting cylinder 5 is in the commanded descending condition, execute step 130, control the second air storage tank 4 to be connected to the lifting cylinder 5, control the second air storage tank 4 to release pressure to the third set pressure range, control the boosting component 3 to be closed and monitor the air pressure of the second air storage tank 4.

[0040] In this step, the processor issues a command for the descent condition, controlling the platform to descend. In this condition, the booster assembly 3 is closed, maintaining pressure in the second gas tank 4. The second gas tank 4 is connected to the lift cylinder 5. When the servo motor drives the platform to descend, the platform compresses the lift rod to retract. The air pressure in the maintained second gas tank 4 provides a certain amount of thrust on the lift rod, which acts as a buffer for the platform's descent, preventing it from descending too quickly and simultaneously reducing the load on the servo motor's descent drive. During the retraction process of the lift cylinder 5 during descent, a small amount of gas is pumped back into the second gas tank 4, during which the air pressure in the second gas tank 4 is monitored. The second gas tank 4 is equipped with a second pressure relief valve 401. Upon receiving the command for the descent condition, the booster assembly 3 is first closed, followed by pressure relief in the second gas tank 4 to a third set pressure range, keeping the air pressure in the second gas tank 4 below the second set pressure range. This prevents the air pressure in the second gas tank 4 from exerting excessive thrust on the lift rod and creating excessive resistance to descent. The third set pressure range can be set between 0.4 times and 0.8 times the second pressure setting range. This value can be adjusted according to actual measurements during the operation of the lifting platform. If the resistance caused by the second gas tank 4 maintaining pressure is too large, the third set pressure range can be lowered.

[0041] When the lifting cylinder 5 is in the commanded descending state, step 140 is executed. If the air pressure of the second air storage tank 4 exceeds the third set pressure range, pressure relief is performed until it returns to the third set pressure range.

[0042] In this step, during the retraction process of the lifting cylinder 5 when the lifting platform is descending, a small amount of gas will be back-pressurized into the second gas tank 4. During this period, the air pressure of the second gas tank 4 is detected. If the air pressure of the second gas tank 4 is greater than the third set pressure range, it may generate excessive thrust on the lifting rod. Timely pressure relief is performed to keep the second gas tank 4 within the third set pressure range, so as to avoid the air pressure in the second gas tank 4 from exerting excessive thrust on the lifting rod and generating excessive descending resistance.

[0043] It is determined whether the lifting cylinder 5 stops working for more than a first preset time. If so, step 150 is executed to control the boosting component 3 to be closed and the second air storage tank 4 to be disconnected from the lifting cylinder 5.

[0044] In this step, when the lifting cylinder 5 stops working for too long, it can be considered to be in a dormant state, and there is no need for the booster component 3 to intervene. The booster component 3 is closed and the second air storage tank 4 is disconnected from the lifting cylinder 5, so that the second air storage tank 4 is in a pressure-maintaining state, storing a certain air pressure for the next use.

[0045] The gas storage and delivery control method provided in this embodiment realizes precise air pressure management of the lifting cylinder through the coordinated control of the multi-stage gas tank and the boosting component. In the ascending condition, the gas pressure is boosted by the boosting component 3 and then delivered to the second gas tank 4 to provide thrust for the lifting cylinder 5, significantly reducing the driving load of the servo motor during the ascending stage. In the descending condition, the pressurized gas in the second gas tank 4 is used to apply a controllable thrust to the lifting rod to cushion the descent impact and reduce the load of the servo motor during descent. The pressure range is automatically switched dynamically according to the ascending / descending conditions, with high pressure assist (second set pressure range) during ascent and pressure relief to a lower pressure (third set pressure range) during descent to act as a buffer. Real-time monitoring and pressure relief ensure that the air pressure is stable within the third set range during descent to prevent descent resistance caused by overpressure. The air circuit is automatically disconnected and pressure is maintained during sleep to reduce energy loss, while retaining air pressure reserves for quick activation next time.

[0046] Figure 3 FIG. 1 is a schematic diagram of a booster assembly provided in an embodiment of the present application. Specifically, Figure 3As shown, the boosting assembly 3 includes a residual pressure release three-way valve 301, an air distributor seat 302, a low-pressure pressure reducing valve 303, an electrically controlled boosting valve 304, and a high-pressure pressure reducing valve 305. One port of the residual pressure release three-way valve 301 is connected to the first air storage tank 2, and one port of the residual pressure release three-way valve 301 is connected to the electrically controlled boosting valve 304. The residual pressure release three-way valve 301 is mainly used for disconnecting and exhausting the gas source, and the air distributor seat 302 is mainly used for diverting the gas line and fixing the residual pressure release three-way valve 301. The low-pressure pressure reducing valve 303 and the high-pressure pressure reducing valve 305 use pressure reducing valves with a reverse flow function to prevent the internal structure of the pressure reducing valve from being damaged due to different pressures on both sides. The pipe joints at the rear section of the low-pressure pressure reducing valve 303 are all high-pressure pipe joints.

[0047] Figure 4 The figure shows a schematic diagram of the method steps for controlling the boost multiple according to the ascending stroke. Figure 4 As shown, when the lifting cylinder 5 is in the commanded ascending state, step 120 includes:

[0048] Step 121: Obtain an ascending instruction, and obtain a corresponding ascending stroke according to the ascending instruction.

[0049] Step 122: If the rising stroke is less than or equal to the first stroke, control the boosting component 3 to perform boosting at the first boosting multiple.

[0050] Step 123: If the rising stroke is greater than the first stroke and less than or equal to the second stroke, control the boosting component 3 to perform boosting at a second boosting multiple.

[0051] Step 124: If the rising stroke is greater than the second stroke, control the boost component 3 to perform boosting at a third boost multiple.

[0052] In this embodiment, the second stroke is greater than the first stroke, the third boost ratio is greater than the second boost ratio, and the second boost ratio is greater than the first boost ratio. This embodiment achieves more precise air pressure control by dynamically adjusting the boost ratio based on the lift cylinder's ascending stroke. When the lift cylinder is in a commanded ascending condition, the system first obtains an ascending command and determines the corresponding ascending stroke. The ascending command is generated by the processor. Then, different boost modes are selected based on the stroke length: a lower boost ratio is used for shorter strokes, a medium boost ratio is used for medium strokes, and a higher boost ratio is used for longer strokes. This graded boosting method provides the perfect air pressure support for different lifting requirements, avoiding energy waste and ensuring a smooth lifting process. During short-stroke operations, the lower air pressure output prevents system overload; during long-stroke operations, the higher boost ratio effectively distributes the load pressure on the servo motor. Furthermore, this intelligent pressure regulation mechanism extends the service life of pneumatic components and reduces unnecessary mechanical wear. It is particularly suitable for automated production scenarios where the lift stroke changes frequently, such as automotive parts stamping lines. The entire control process achieves precise matching of air pressure output and actual working conditions, which not only optimizes energy efficiency but also improves the overall performance of the system.

[0053] Figure 5 The figure shows a schematic diagram of the control steps when the air pressure oscillation occurs in the second air storage tank. Figure 5 As shown, when the lifting cylinder 5 is in the commanded ascending working condition, the air storage and delivery control method for the cylinder further includes:

[0054] Step 1201: If the air pressure in the first air storage tank 2 drops to a fourth set pressure range, monitor the air pressure change in the second air storage tank 4 while the boosting component 3 is performing the boosting.

[0055] Step 1202: If the reduction range of the second gas storage tank 4 is greater than the preset range, the boosting component 3 is controlled to increase the boosting ratio.

[0056] Step 1203 , controlling and increasing the input rate of gas from the gas source 1 to the first gas storage tank 2 .

[0057] In this embodiment, the fourth set pressure range is smaller than the first set pressure range. This embodiment further optimizes the responsiveness and stability of the gas storage and delivery system by dynamically monitoring and adjusting air pressure parameters. When the pressure in the first gas tank drops to the fourth set pressure range, the system immediately activates the boost monitoring mechanism to track pressure fluctuations in the second gas tank in real time. Upon detecting a rapid drop in pressure in the second gas tank, the system simultaneously implements dual regulatory measures: first, it increases the booster ratio (for example, to 1.5-2 times) to rapidly replenish high-pressure gas; second, it accelerates the rate of gas supply to the first gas tank, for example, to 1.5-2 times the input rate. This coordinated regulatory mechanism effectively mitigates potential air supply delays and ensures rapid restoration of system pressure balance during pressure fluctuations. By setting the fourth pressure range as the trigger threshold, the system can intervene before the gas pressure is completely depleted, preventing unstable lifting movements or servo motor overload caused by sudden pressure drops. This proactive pressure management strategy is particularly well-suited for continuous operation scenarios, maintaining a constant and stable output from the air pressure system. This not only ensures the effective assist of the lift cylinders but also extends the life of the pneumatic components. The entire regulation process ensures real-time matching of air pressure supply and demand, significantly improving the system's dynamic responsiveness and overall reliability.

[0058] Figure 6 The figure shows a schematic diagram of the method steps for controlling the boost multiple according to the real-time rising speed. Figure 6 As shown, when the lifting cylinder 5 is in the commanded ascending state, step 120 includes:

[0059] Step 125: When the ascending working condition is instructed, the corresponding real-time ascending speed is obtained according to the ascending instruction.

[0060] Step 126 , matching the corresponding boost ratio according to the real-time rising speed, and controlling the boost component 3 to perform boosting according to the boost ratio.

[0061] In this embodiment, the boost ratio is proportional to the real-time rising speed. This embodiment realizes the intelligent adjustment of the lifting cylinder's power-assisting effect by introducing a speed-pressure linkage control mechanism. When the system receives an ascending instruction, it not only determines the stroke length, but also dynamically matches the optimal boost ratio according to the real-time rising speed required by the instruction. When rapid ascent is required, the system automatically adopts a higher boost ratio to provide stronger thrust support for the cylinder, ensuring that the servo motor can still maintain a stable load under high-speed conditions; conversely, when ascending at low speed, the boost ratio is reduced to avoid energy waste or mechanical shock caused by excess air pressure.

[0062] The relationship between the real-time ascent speed v and the boost ratio h is preset. For example, the lowest ascent speed that the lifting platform can achieve is v1, and the highest ascent speed is v2. The lowest boost ratio that the boost component 3 can achieve is h1, and the highest boost ratio is h2. The boost ratio changes uniformly with the real-time ascent speed, that is, the boost ratio and the real-time ascent speed correspond linearly to each other, h=h1+(v-v1)×[(h2-h1) / (v2-v1)]. For example, if v1 is 2 mm / s, v2 is 10 mm / s, h1 is 0.2, and h2 is 3, the slope of the boost ratio is (h2-h1) / (v2-v1)=2.8 / 8=0.35, then h=0.2+(v-2)×2.8 / 8=0.2+0.35(v-2).

[0063] This on-demand adjustment method precisely matches air pressure output with movement speed, meeting power requirements under varying operating conditions while optimizing overall energy efficiency. Particularly in automated production lines requiring variable speeds, this control method can adapt to speed changes in real time, consistently maintaining optimal air pressure assistance, effectively improving system response speed and stability while reducing the operating load on the servo motor.

[0064] Figure 7 The figure shows a method for controlling the pressure relief opening according to the real-time descent speed. Figure 7 As shown, the second air storage tank 4 is provided with a second pressure relief valve 401. When the lifting cylinder 5 is in the commanded descending state, step 140 includes:

[0065] Step 141: Obtain the real-time descent speed of the commanded descent condition.

[0066] Step 142: If the air pressure of the second air storage tank 4 exceeds the third set pressure range, open the second pressure relief valve 401.

[0067] Step 143: Match the second opening of the second pressure relief valve 401 according to the real-time descending speed, where the second opening is inversely proportional to the real-time descending speed.

[0068] Step 144 : If the air pressure of the second air storage tank 4 returns to the third set pressure range, close the second pressure relief valve 401 .

[0069] In this embodiment, as the lift cylinder 5 descends, the lifting rod pushes a small amount of gas back into the second air tank 4. A faster real-time descent speed indicates a faster retraction of the lift cylinder 5. In this case, a smaller second opening corresponds to less air pressure release from the second air tank 4. The slower pressure drop in the second air tank 4 can somewhat slow the retraction of the lift rod, thereby reducing the real-time descent speed and providing a more effective linear cushioning effect. This prevents the pressure in the second air tank 4 from decreasing too quickly, resulting in insufficient support for the lift rod and a faster real-time descent of the lift cylinder 5.

[0070] The inverse relationship between the real-time descent speed a and the second opening d is preset. For example, the lowest descent speed that the lifting platform can reach is a1, the highest descent speed is a2, the minimum opening that the electronically controlled boost valve can reach is d1, and the maximum opening is d2. Then d=m+k / a, coefficient k=a1a2(d2-d1) / (a2-a1), m=d2-k / a1, and the inverse mapping formula can be obtained:

[0071] d=a1a2(d2-d1) / a(a2-a1)+(a1d2-a2d1) / (a1-a2).

[0072] Take an example to verify the above formula: the range of the descending speed a is 3mm / s~10mm / s, the range of the second opening d is 0.1~1, k=27 / 7, m=-2 / 7, and substituting it into the above inverse mapping formula, we can get d=27 / 7 / a-2 / 7. When a is 3mm / s, d≈1, and when a is 10mm / s, d is approximately equal to 0.1.

[0073] This embodiment significantly improves the smoothness of the lifting cylinder's descent motion by introducing a speed-adaptive pressure relief control mechanism. Upon detecting a descent condition, the system monitors the current descent speed in real time and intelligently adjusts the opening of the second pressure relief valve accordingly. When the real-time descent speed increases, the system automatically reduces the pressure relief valve opening, slowing the real-time rate of pressure drop in the second air tank 4. This creates a greater buffering resistance and effectively prevents excessive descent. Conversely, when the speed decreases, the opening is increased to increase the pressure relief speed, allowing for a faster return to the third set pressure range. This dynamic adjustment precisely matches the pressure relief force with the real-time descent speed, creating a closed-loop control effect. This embodiment leverages the physical properties of the lift rod's back pressure gas to adjust system damping by controlling the pressure relief speed, achieving a smoother linear deceleration effect. In practical applications, this intelligent buffering mechanism effectively prevents impact vibration during heavy-load descent, protecting equipment safety while also reducing the braking load on the servo motor and extending the service life of the transmission system. This allows the lifting mechanism to maintain an ideal descent curve under varying load conditions, significantly improving the equipment's operational quality and reliability.

[0074] In one embodiment, the first air storage tank 2 is provided with a first drain valve 206, and the second air storage tank 4 is provided with a second drain valve 406. The air storage and air delivery control method for the cylinder includes:

[0075] Step 160: Timely open the first drain valve 206 and the second drain valve 406 to perform drainage.

[0076] This embodiment effectively addresses the common problem of moisture accumulation in pneumatic systems by providing a timed drainage function. The system automatically and periodically opens the drain valves of the first and second air tanks to promptly drain any condensed moisture from the compressed air. This timed drainage mechanism prevents long-term retention of moisture within the air tanks, thereby avoiding problems such as pipe corrosion and valve sticking. This significantly increases the service life and reliability of pneumatic components and prevents fluctuations in the power assist effect caused by moisture. Specifically, step 160 has no logical precedence relationship with steps 110 through 150 and can be executed during or before or after the execution of any of the steps.

[0077] Figure 8 The figure shows the pressure control steps during abnormal descent. Figure 8 As shown, the gas storage and delivery control method for the cylinder also includes:

[0078] Step 170: When the lifting cylinder 5 is in an abnormal descending condition, the boosting assembly 3 is controlled to connect the first air tank 2 and the second air tank 4 and perform boosting, so that the pressure in the second air tank 4 is maintained within a fourth set pressure range, and the second air tank 4 is controlled to connect with the lifting cylinder 5.

[0079] In this embodiment, the fourth set pressure range is greater than or equal to the second set pressure range, and the real-time descent speed corresponding to the abnormal descent condition is greater than the real-time descent speed corresponding to the commanded descent condition, or the amplitude of the real-time descent speed corresponding to the abnormal descent condition within a unit reference time period is greater than the preset speed amplitude. When applied, this embodiment introduces an active air pressure compensation mechanism for abnormal conditions, significantly enhancing the system's safety protection capabilities. When an abnormal increase or sharp fluctuation in the real-time descent speed is detected, the system immediately initiates an emergency response procedure, rapidly replenishing high-pressure gas to the second air tank via the booster assembly to maintain the pressure within the higher fourth set pressure range. This active boost compensation provides additional support for the lift cylinder in emergency situations, effectively suppressing uncontrolled descent. Compared to conventional passive buffering methods, this design offers faster response and stronger braking force, allowing it to quickly stabilize abnormal motion conditions. In particular, in emergency situations such as sudden load changes or mechanical failures, this mechanism can buy the system valuable reaction time, preventing equipment damage or safety accidents. Furthermore, by setting the fourth pressure range to no less than the normal operating pressure (which is defined as the second set pressure range), sufficient buffering force is ensured even under abnormal conditions. This intelligent safety protection design not only retains the energy-saving advantages of the original system, but also significantly enhances the reliability and safety of the equipment, providing double protection for the automated production line.

[0080] Figure 9 The figure shows the pressure control steps during fine-tuning operation. Figure 2 As shown, the second gas storage tank 4 is provided with a second pressure relief valve 401. Figure 9 As shown, the gas storage and delivery control method for the cylinder also includes:

[0081] When the lifting cylinder 5 is in the fine-tuning state, step 180 is executed to control the boosting assembly 3 and the second pressure relief valve 401 to work together to maintain the pressure in the second air storage tank 4 within the fifth set pressure range. In this step, the fifth set pressure range is smaller than the second set pressure range.

[0082] Step 190: Close the boost component 3.

[0083] Step 200 , controlling the second gas storage tank 4 to communicate with the lifting cylinder 5 .

[0084] This embodiment, when applied, incorporates a precise pressure control mechanism for fine-tuning conditions, significantly improving the system's control performance during precision operations. When the lift cylinder enters the fine-tuning mode, the system activates a special pressure management mode: by collaboratively controlling the booster assembly and the second pressure relief valve, the pressure in the second air tank is stabilized within the fifth set range, which is lower than the normal operating pressure. This low-pressure maintenance mode provides gentler cushioning thrust support for the lift cylinder, providing a certain amount of support for fine-tuning. During fine-tuning, the system ensures that the pressure remains stable within the fifth set pressure range. When the second set pressure range is reached, the booster assembly 3 is shut off, maintaining air communication between the second air tank 4 and the lift cylinder 5. This control method is particularly suitable for operations requiring high-precision positioning, such as precision assembly or inspection workstations, and effectively eliminates the "creeping" or "shaking" that can occur with traditional pneumatic systems during fine-tuning. By reducing the operating pressure, the system achieves smoother motion characteristics and finer control resolution, while also reducing energy consumption and equipment wear.

[0085] Figure 10 Schematic diagram of the steps for controlling the air pressure of the second air tank during fine-tuning operation. Figure 10 As shown, when the lifting cylinder 5 is in the fine-tuning state, step 180 includes:

[0086] Step 181: When the lifting cylinder 5 is in the fine-tuning state, detect the air pressure of the second air storage tank 4.

[0087] Step 182: If the air pressure in the second air storage tank 4 is lower than the fifth set pressure range, the second pressure relief valve 401 is controlled to close, and the boosting assembly 3 is controlled to connect the first air storage tank 2 and the second air storage tank 4 to perform boosting until the air pressure in the second air storage tank 4 reaches the fifth set pressure range.

[0088] Step 183 : If the air pressure in the second air storage tank 4 is greater than the fifth set pressure range, the boosting assembly 3 is controlled to be closed, and the second pressure relief valve 401 is controlled to be opened until the air pressure in the second air storage tank 4 reaches the fifth set pressure range.

[0089] In practice, this embodiment utilizes closed-loop control with real-time air pressure detection and dynamic adjustment to regulate pressure during fine-tuning operations. When the pressure is detected to be below the fifth set range, the pressure relief valve is immediately closed and the booster assembly is activated for precise pressure replenishment. When the pressure is too high, the booster assembly is closed and the pressure relief valve is opened for moderate pressure relief. This bidirectional regulation mechanism ensures that the pressure in the second air tank remains stable within the low-pressure range optimal for fine-tuning operations, providing the perfect flexible driving force for the lifting cylinder. Compared to conventional single-pressure control, this design offers three significant advantages: First, real-time feedback adjustment eliminates the pressure fluctuations often encountered in traditional systems, ensuring smoother and more precise fine-tuning. Second, the low-pressure operating mode significantly reduces the inertial effect of cylinder motion, effectively preventing overshoot during precise positioning. Finally, intelligent switching between boost and pressure relief functions enables precise energy delivery and avoids unnecessary energy consumption. This refined pressure management is particularly suitable for applications requiring stringent positioning accuracy, such as precision instrument assembly or high-precision testing processes. It elevates the control accuracy of the air pressure system to a new level while extending the service life of pneumatic components. The entire control process responds quickly and adjusts delicately, allowing the equipment to maintain sufficient motion sensitivity and achieve sub-millimeter positioning accuracy under fine-tuning conditions.

[0090] An exemplary air storage and delivery control system for a cylinder is as follows:

[0091] Figure 11 The figure shows a schematic diagram of the system structure of the air storage and air supply control system for the cylinder. The present application also provides an air storage and air supply control system for the cylinder, which is applied to the lifting cylinder air supply device of the auxiliary lifting servo motor. The lifting cylinder air supply device includes an air source 1, a first air storage tank 2, a booster component 3 and a second air storage tank 4 connected in sequence. The second air storage tank 4 is connected to the lifting cylinder 5, as shown in FIG. Figure 11 As shown, the air storage and delivery control system for the cylinder includes: a first air tank pressure control module 1101, an ascending control module 1102, a descending control module 1103 and a shutdown module 1104.

[0092] The first gas tank pressure control module 1101 is configured to control the gas source 1 to input gas into the first gas tank 2 until the pressure reaches a first set pressure range.

[0093] The lifting control module 1102 is configured as follows: when the lifting cylinder 5 is in the commanded lifting condition, the boosting component 3 is controlled to connect the first air tank 2 and the second air tank 4 and perform boosting until the second set pressure range is reached in the second air tank 4, and the second air tank 4 is controlled to be connected to the lifting cylinder 5.

[0094] The descent control module 1103 is configured as follows: when the lifting cylinder 5 is in the commanded descent condition, the second air tank 4 is controlled to be connected to the lifting cylinder 5, the second air tank 4 is controlled to release pressure to the third set pressure range, and the boost component 3 is controlled to close and monitor the air pressure of the second air tank 4; when the lifting cylinder 5 is in the commanded descent condition, if the air pressure of the second air tank 4 exceeds the third set pressure range, the pressure is released until it returns to the third set pressure range.

[0095] The shutdown module 1104 is configured to control the boost assembly 3 to shut down and the second air storage tank 4 to disconnect from the lifting cylinder 5 if the lifting cylinder 5 stops working for more than a first preset time period.

[0096] The gas storage and delivery control method provided in this embodiment realizes precise air pressure management of the lifting cylinder through the coordinated control of the multi-stage gas tank and the boosting component. In the ascending condition, the gas pressure is boosted by the boosting component 3 and then delivered to the second gas tank 4 to provide thrust for the lifting cylinder 5, significantly reducing the driving load of the servo motor during the ascending stage. In the descending condition, the pressurized gas in the second gas tank 4 is used to apply a controllable thrust to the lifting rod to cushion the descent impact and reduce the load of the servo motor during descent. The pressure range is automatically switched dynamically according to the ascending / descending conditions, with high pressure assist (second set pressure range) during ascent and pressure relief to a lower pressure (third set pressure range) during descent to act as a buffer. Real-time monitoring and pressure relief ensure that the air pressure is stable within the third set range during descent to prevent descent resistance caused by overpressure. The air circuit is automatically disconnected and pressure is maintained during sleep to reduce energy loss, while retaining air pressure reserves for quick activation next time.

[0097] The basic principles of the present application have been described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, and effects mentioned in this application are merely illustrative and not restrictive, and it should not be assumed that these advantages, strengths, and effects are required of each embodiment of this application. In addition, the specific details disclosed above are merely illustrative and facilitating understanding, and are not restrictive. The above details do not limit this application to necessarily being implemented using the above specific details.

[0098] The block diagrams of the devices, devices, equipment, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As will be appreciated by those skilled in the art, these devices, devices, equipment, and systems can be connected, arranged, or configured in any manner. Words such as "include," "comprise," "have," and the like are open-ended words, meaning "including but not limited to," and can be used interchangeably therewith. The words "or" and "and" used herein refer to the words "and / or" and can be used interchangeably therewith, unless the context clearly indicates otherwise. The word "such as" used herein refers to the phrase "such as but not limited to," and can be used interchangeably therewith.

[0099] It should also be noted that in the apparatus, device, and method of the present application, each component or each step can be decomposed and / or recombined, and such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

[0100] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to be applied in the widest sense consistent with the principles and novel features of the present invention.

[0101] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A method for controlling air storage and air supply for a cylinder, applied to a lifting cylinder air supply device of an auxiliary lifting servo motor, wherein the lifting cylinder air supply device comprises an air source, a first air storage tank, a pressurizing assembly, and a second air storage tank connected in sequence, wherein the second air storage tank is connected to the lifting cylinder, characterized in that: The method comprises: Controlling the gas source to input gas into the first gas storage tank until a first set pressure range is reached; When the lift cylinder is in a commanded ascending condition, the boosting assembly is controlled to connect the first air tank and the second air tank and perform boosting until the pressure in the second air tank reaches a second set pressure range, and the second air tank is controlled to connect to the lift cylinder; When the lift cylinder is in a commanded descending condition, controlling the second air storage tank to communicate with the lift cylinder, controlling the second air storage tank to release pressure to a third set pressure range, controlling the boosting assembly to close, and monitoring the air pressure of the second air storage tank; When the lift cylinder is in a commanded descending state, if the air pressure of the second air storage tank exceeds the third set pressure range, performing pressure relief until the pressure returns to the third set pressure range; and If the lifting cylinder stops working for more than a first preset time, the booster assembly is controlled to be closed, and the second air storage tank is controlled to be disconnected from the lifting cylinder; When the lift cylinder is in an abnormal descending condition, controlling the boosting assembly to connect the first air tank and the second air tank and perform boosting so that the pressure in the second air tank is maintained within a fourth set pressure range, and controlling the second air tank to connect with the lift cylinder; wherein, the second gas storage tank is provided with a second pressure relief valve; the fourth set pressure range is greater than or equal to the second set pressure range; the real-time descent speed corresponding to the abnormal descent condition is greater than the real-time descent speed corresponding to the commanded descent condition; or the real-time descent speed corresponding to the abnormal descent condition has a change amplitude greater than a preset speed variation amplitude within a unit reference time length; When the lifting cylinder is in the commanded descending condition, if the air pressure of the second air storage tank exceeds the third set pressure range, performing pressure relief until the pressure returns to the third set pressure range, including: Get the real-time descent speed of the command descent condition; If the air pressure of the second air storage tank exceeds the third set pressure range, opening the second pressure relief valve; matching a second opening of the second pressure relief valve according to the real-time descending speed, wherein the second opening is inversely proportional to the real-time descending speed; and If the air pressure of the second air storage tank returns to the third set pressure range, the second pressure relief valve is closed.

2. The air storage and delivery control method for a cylinder according to claim 1, characterized in that: When the lift cylinder is in a commanded ascending condition, controlling the boosting assembly to connect the first air storage tank and the second air storage tank and perform boosting until the pressure in the second air storage tank reaches a second set pressure range, and controlling the second air storage tank to connect with the lift cylinder, including: Obtaining an ascending instruction, and obtaining a corresponding ascending stroke according to the ascending instruction; If the rising stroke is less than or equal to the first stroke, controlling the boosting component to perform boosting at a first boosting multiple; If the rising stroke is greater than the first stroke and less than or equal to the second stroke, controlling the boosting component to perform boosting at a second boosting multiple; and If the rising stroke is greater than the second stroke, controlling the boosting component to perform boosting at a third boosting multiple; Among them, the second stroke is greater than the first stroke, the third boost multiple is greater than the second boost multiple, and the second boost multiple is greater than the first boost multiple.

3. The air storage and delivery control method for a cylinder according to claim 1, characterized in that: Also includes: When the lift cylinder is in a commanded ascending condition: if the air pressure in the first air tank drops to a fourth set pressure range, the air pressure change in the second air tank is monitored during the boosting process of the boosting component; if the pressure drop in the second air tank is greater than a preset pressure, the boosting component is controlled to increase the boosting ratio; and controlling and increasing the input rate of gas from the gas source to the first gas storage tank; The fourth set pressure range is smaller than the first set pressure range.

4. The air storage and delivery control method for a cylinder according to claim 1, characterized in that: When the lift cylinder is in a commanded ascending condition, controlling the boosting assembly to connect the first air storage tank and the second air storage tank and perform boosting until the pressure in the second air storage tank reaches a second set pressure range, and controlling the second air storage tank to connect with the lift cylinder, including: When the ascending working condition is instructed, the corresponding real-time ascending speed is obtained according to the ascending instruction; and The corresponding boost ratio is matched according to the real-time rising speed, and the boost component is controlled to perform boosting according to the boost ratio; wherein the boost ratio is proportional to the real-time rising speed.

5. The air storage and delivery control method for a cylinder according to claim 1, characterized in that: The first gas storage tank is provided with a first drain valve, and the second gas storage tank is provided with a second drain valve; The gas storage and delivery control method for the cylinder also includes: The first drain valve and the second drain valve are opened at a fixed time to perform drainage.

6. The air storage and delivery control method for a cylinder according to claim 1, characterized in that: The second gas storage tank is provided with a second pressure relief valve; The gas storage and delivery control method for the cylinder also includes: When the lifting cylinder is in a fine-tuning state, the boosting assembly and the second pressure relief valve are controlled to work in coordination to maintain the pressure in the second air storage tank within a fifth set pressure range; the fifth set pressure range is smaller than the second set pressure range; closing the boost assembly; and Control the second air storage tank to communicate with the lifting cylinder.

7. The air storage and delivery control method for a cylinder according to claim 6, characterized in that: When the lifting cylinder is in the fine-tuning working state, controlling the boosting assembly and the second pressure relief valve to work in coordination to maintain the pressure in the second air storage tank within a fifth set pressure range includes: When the lifting cylinder is in a fine-tuning state, detecting the air pressure of the second air storage tank; If the air pressure in the second air storage tank is lower than the fifth set pressure range, the second pressure relief valve is controlled to close, and the boosting assembly is controlled to connect the first air storage tank and the second air storage tank and perform boosting until the air pressure in the second air storage tank reaches the fifth set pressure range; If the air pressure in the second air storage tank is greater than the fifth set pressure range, the boosting assembly is controlled to close, and the second pressure relief valve is controlled to open until the air pressure in the second air storage tank reaches the fifth set pressure range.

8. An air storage and air supply control system for a cylinder, applied to a lifting cylinder air supply device of an auxiliary lifting servo motor, the lifting cylinder air supply device comprising an air source, a first air storage tank, a booster assembly, and a second air storage tank connected in sequence, wherein the second air storage tank is connected to the lifting cylinder, characterized in that: For implementing the gas storage and delivery control method for a cylinder according to any one of claims 1 to 7, the system comprises: A first gas tank pressure control module is configured to: control the gas source to input gas into the first gas tank until a first set pressure range is reached; an ascending control module configured to: when the lift cylinder is in a commanded ascending condition, control the boosting assembly to connect the first air tank and the second air tank and perform boosting until the pressure in the second air tank reaches a second set pressure range, and control the second air tank to connect to the lift cylinder; a descent control module configured to: when the lift cylinder is in a commanded descent condition, control the second air tank to communicate with the lift cylinder, control the second air tank to release pressure to a third set pressure range, control the booster assembly to close, and monitor the air pressure of the second air tank; when the lift cylinder is in a commanded descent condition, if the air pressure of the second air tank exceeds the third set pressure range, release the pressure until it returns to the third set pressure range; and The shutdown module is configured to: if the lifting cylinder stops working for more than a first preset time, control the boosting component to close and control the second air tank to be disconnected from the lifting cylinder.

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