Air supply device for hydraulic system of speed regulator

Abstract

The utility model discloses an air supply device of a speed regulator hydraulic system, and relates to the technical field of speed regulator hydraulic systems. The air supply device of the hydraulic system of the speed regulator comprises an air supply assembly, and the air supply assembly comprises an air supply medium-pressure unit, a medium-pressure air tank group, a pressure air tank and a pressure oil tank which are communicated in sequence; the system further comprises a boosting assembly, the boosting assembly comprises a low-pressure maintenance air drying pipe and a boosting medium-pressure machine, an air inlet of the boosting medium-pressure machine is communicated with the low-pressure maintenance air drying pipe, and an air outlet of the boosting medium-pressure machine is communicated with an air inlet of the medium-pressure air tank set. By additionally arranging the boosting assembly, when a speed regulator hydraulic system needs to be boosted again after pressure is completely removed, the air supply assembly and the boosting assembly are used for cooperatively supplying air, the air supply amount in the system boosting process is greatly increased, the system can reach the pressure needed by stable operation of a unit in a short time, the boosting time is shortened, and the working efficiency is improved. And major potential safety hazards such as unstable unit operation and even shutdown possibly caused by boosting delay are avoided.

Description

Technical Field

[0001] This application relates to the technical field of governor hydraulic systems, and specifically to an air supply device for a governor hydraulic system. Background Technology

[0002] The governor hydraulic system is an auxiliary control device for the stable operation of a hydro-generator unit. It ensures the power station can efficiently and stably output electrical energy by precisely controlling the speed of the turbine or steam turbine. The air supply unit, as an important component of the governor hydraulic system, provides a stable air source to ensure the stable operation of the governor system.

[0003] Currently, hydraulic air supply devices typically consist of a medium-pressure compressor, a medium-pressure air tank, a pressure air tank, and a pressure oil tank connected in sequence. The medium-pressure compressor compresses air to a specific pressure and then delivers it to the medium-pressure air tank for storage. The medium-pressure air tank, under pressure, then delivers the gas to the pressure air tank, which ultimately reaches the pressure oil tank, supplying a stable supply of hydraulic oil to the governor's hydraulic system to meet the air pressure requirements for normal system operation.

[0004] However, in actual operation, when the governor hydraulic system is completely depressurized and needs to be repressurized, the air supply often cannot meet the air consumption required for the governor hydraulic system to pressurize. This will cause the system pressure to be lower than the pressure required for the unit to operate stably, thus affecting the stable operation of the unit and posing serious safety hazards to the stable operation of the governor hydraulic system and the safe operation of the hydro-generator unit. Utility Model Content

[0005] The purpose of this application is to provide an air supply device for a governor hydraulic system, which solves the problem that the system pressure is lower than the pressure required for stable operation of the unit when the governor hydraulic system needs to be repressurized after complete depressurization.

[0006] The technical solution adopted by this application to solve its technical problem is:

[0007] A speed governor hydraulic system air supply device includes an air supply assembly, which includes an air supply medium-pressure unit, a medium-pressure air tank group, a pressure air tank, and a pressure oil tank connected in sequence; it also includes a pressure boosting assembly, which includes a maintenance low-pressure air main and a pressure boosting medium-pressure unit, wherein the air inlet of the pressure boosting medium-pressure unit is connected to the maintenance low-pressure air main, and the air outlet of the pressure boosting medium-pressure unit is connected to the air inlet of the medium-pressure air tank group.

[0008] Furthermore, the pressurization assembly also includes a first dehydration device, and the outlet of the pressurization intermediate compressor is connected to the inlet of the intermediate pressure gas tank group through the first dehydration device.

[0009] Furthermore, the first dehydration device includes a first refrigerated dryer and a first gas-water separator. The air inlet of the first refrigerated dryer is connected to the air outlet of the booster medium-pressure machine, the air outlet of the first refrigerated dryer is connected to the air inlet of the first gas-water separator, and the air outlet of the first gas-water separator is connected to the air inlet of the medium-pressure gas tank group.

[0010] Furthermore, a first check valve and a first normally open valve are sequentially provided on the pipeline between the outlet of the booster compressor and the inlet of the first refrigerated dryer along the gas delivery direction. A second normally open valve is provided on the pipeline between the outlet of the first refrigerated dryer and the inlet of the first gas-water separator. The inlet of the first normally open valve is connected to the outlet of the second normally open valve through a first spare pipe. A first normally closed valve is provided on the first spare pipe.

[0011] Furthermore, the gas supply medium-pressure unit includes multiple gas supply medium-pressure units, and the outlet of each gas supply medium-pressure unit is connected to the inlet of the medium-pressure gas tank group through a second water removal device.

[0012] Furthermore, the second dehydration device includes a second refrigerated dryer and a second gas-water separator. The air inlet of the second refrigerated dryer is connected to the air outlet of the medium-pressure gas supply unit, the air outlet of the second refrigerated dryer is connected to the air inlet of the second gas-water separator, and the air outlet of the second gas-water separator is connected to the air inlet of the medium-pressure gas tank group.

[0013] Furthermore, a second check valve and a third normally open valve are sequentially installed on the pipeline between the outlet of the gas supply compressor and the inlet of the second refrigerated dryer along the gas delivery direction. A fourth normally open valve is installed on the pipeline between the outlet of the second refrigerated dryer and the inlet of the second gas-water separator. The inlet of the third normally open valve is connected to the outlet of the fourth normally open valve through a second spare pipe. A second normally closed valve is installed on the second spare pipe.

[0014] Furthermore, the medium-pressure gas tank group includes multiple medium-pressure gas tanks, the inlet of each medium-pressure gas tank is connected to a medium-pressure gas main pipe, the medium-pressure gas main pipe is connected to the outlet of the gas supply medium-pressure unit, the outlet of each medium-pressure gas tank is connected to a medium-pressure gas supply main pipe, and the medium-pressure gas supply main pipe is connected to the inlet of the pressure gas tank.

[0015] Furthermore, the medium-pressure gas supply main pipe is connected to the air inlet of the pressure gas tank through an automatic gas replenishment valve assembly.

[0016] Furthermore, the medium-pressure gas tank is equipped with a medium-pressure gas tank level sensor, and the bottom of the medium-pressure gas tank is equipped with a medium-pressure gas tank electric drain valve. The pressure gas tank is equipped with a pressure gas tank level sensor, and the bottom of the pressure gas tank is equipped with a pressure gas tank electric drain valve. The medium-pressure gas tank level sensor, the medium-pressure gas tank electric drain valve, the pressure gas tank level sensor, and the pressure gas tank electric drain valve are all connected to the controller.

[0017] The beneficial effects of this application are:

[0018] The air supply device for the governor hydraulic system provided in this application embodiment can continuously and stably provide the air source required for the normal operation of the governor hydraulic system by utilizing the air supply component, ensuring that the system always maintains a good working condition under normal operating conditions. By adding a pressure boosting component, when the governor hydraulic system needs to be repressurized after complete depressurization, the air supply component and the pressure boosting component work together to significantly increase the air supply during the system's pressure boosting process. This allows the system to reach the pressure required for stable unit operation in a shorter time, effectively shortening the pressure boosting time and avoiding major safety hazards such as unit instability or even shutdown that may be caused by pressure boosting delay. By connecting the air inlet of the boosting intermediate pressure compressor to the maintenance low-pressure air main pipe, this application can make full use of the existing low-pressure gas resources in the maintenance low-pressure air main pipe, improve pressure boosting efficiency, and reduce the load on the boosting intermediate pressure compressor. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the air supply device for the speed governor hydraulic system provided in the embodiments of this application;

[0021] Figure 2 This is a schematic diagram of the boost converter assembly;

[0022] Figure 3 This is a schematic diagram of the connection between the medium-pressure gas supply unit and the medium-pressure gas tank group.

[0023] Figure label:

[0024] 10 - Medium-pressure gas supply unit;

[0025] 101-Gas supply medium-pressure unit; 102-Second dehydration device; 1021-Second refrigerated dryer; 1022-Second gas-water separator; 103-Second check valve; 104-Third normally open valve; 105-Fourth normally open valve; 106-Second spare pipe; 107-Second normally closed valve;

[0026] 11-Medium-pressure gas tank assembly; 111-Medium-pressure gas tank; 12-Pressure gas tank; 13-Pressure oil tank; 14-Medium-pressure gas main pipe; 15-Medium-pressure gas supply main pipe; 16-Automatic gas replenishment valve assembly; 17-Medium-pressure gas tank level sensor; 18-Medium-pressure gas tank electric drain valve; 19-Pressure gas tank level sensor; 20-Pressure gas tank electric drain valve; 21-Controller; 22-Drain pipe;

[0027] 30 - Overhaul low-pressure gas main; 31 - Medium-pressure booster; 32 - First dehydration device; 321 - First refrigerated dryer; 322 - First gas-water separator; 33 - First check valve; 34 - First normally open valve; 35 - Second normally open valve; 36 - First spare pipe; 37 - First normally closed valve. Detailed Implementation

[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0029] In the description of this application, the terms "upper," "lower," "left," "right," "front," "rear," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Unless otherwise specified, the above-mentioned orientational descriptions can be flexibly set in actual application, provided that the relative positional relationships shown in the accompanying drawings are satisfied.

[0030] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0031] See Figure 1 This application provides a speed governor hydraulic system air supply device, including an air supply component, which includes an air supply medium-pressure unit 10, a medium-pressure air tank group 11, a pressure air tank 12, and a pressure oil tank 13 connected in sequence; it also includes a pressure boosting component, which includes a maintenance low-pressure air main 30 and a pressure boosting medium-pressure unit 31. The air inlet of the pressure boosting medium-pressure unit 31 is connected to the maintenance low-pressure air main 30, and the air outlet of the pressure boosting medium-pressure unit 31 is connected to the air inlet of the medium-pressure air tank group 11.

[0032] See Figure 1 The air supply assembly is used to provide the air source required for the normal operation of the governor hydraulic system, ensuring that the governor hydraulic system always maintains a good working condition under normal operating conditions. The air supply assembly mainly includes an air supply medium-pressure unit 10, a medium-pressure air tank group 11, a pressure air tank 12, and a pressure oil tank 13.

[0033] The medium-pressure air supply unit 10 may include at least two medium-pressure air supply compressors 101. The air inlet of each compressor 101 is directly connected to the atmosphere for drawing in air from the outside. The air outlet of each compressor 101 is connected to the air inlet of a medium-pressure air tank group 11 via a pipe, thereby allowing the compressors 101 to compress air to a specific pressure and then deliver it to the medium-pressure air tank group 11 for storage. Each compressor 101 also has a drain outlet at its bottom for discharging wastewater generated during operation. This wastewater mainly originates from the condensation of moisture in the air during compression. The drain outlet of each compressor 101 can be connected to a drain pipe 22 via a pipe. The medium-pressure air tank group 11 may include at least one medium-pressure air tank 111. For example, three compressors 101 are used to compress air to 7 MPa and then deliver it to two medium-pressure air tanks 11 of the medium-pressure air tank group 11 for storage.

[0034] The outlet of the medium-pressure air tank assembly 11 is connected to the inlet of the pressure air tank 12 via a pipeline. The outlet of the pressure air tank 12 is connected to the inlet of the pressure oil tank 13 via a pipeline. The upper part of the inner cavity of the pressure oil tank 13 is connected to its inlet, and the lower part of the inner cavity of the pressure oil tank 13 stores hydraulic oil. Under pressure, the medium-pressure air tank assembly 11 can deliver the compressed air stored within it to the pressure air tank 12, and finally to the pressure oil tank 13, to regulate the pressure and oil volume in the pressure oil tank 13, so as to provide a stable hydraulic oil supply to the speed governor system using the pressure oil tank 13.

[0035] The medium-pressure gas tank 111 of the medium-pressure gas tank assembly 11 is equipped with a pressure transmitter, which, along with the medium-pressure gas supply compressor 101, is connected to the controller 21. The pressure transmitter monitors the pressure inside the medium-pressure gas tank 111 in real time and sends the pressure data to the controller 21. When the pressure inside the medium-pressure gas tank 111 is lower than the preset pressure in the controller 21, the controller 21 issues a start command for the medium-pressure gas supply compressor 101. Upon receiving the command, the compressor starts and delivers air to the medium-pressure gas tank 111 for storage after three stages of compression. The controller 21 includes, but is not limited to, a PLC controller.

[0036] See Figure 1 The booster assembly provides the air source needed for rapid pressurization when the governor's hydraulic system is completely depressurized and then repressurized, thereby shortening the pressurization time. The booster assembly mainly includes a low-pressure air main 30 for maintenance and a medium-pressure booster 31.

[0037] The maintenance low-pressure air main 30 serves as the air supply line for each section within the workshop, storing low-pressure air; for example, it stores compressed air at 0.8 MPa. The inlet of the booster compressor 31 is connected to the maintenance low-pressure air main 30, allowing it to draw in low-pressure air. The outlet of the booster compressor 31 is connected to the inlet of the medium-pressure air tank group 11 via a pipe, enabling the booster compressor 31 to compress the low-pressure air in the maintenance low-pressure air main 30 to a specific pressure before delivering it to the medium-pressure air tank group 11 for storage. The bottom of the booster compressor 31 also has a drain outlet for discharging wastewater generated during operation. This drain outlet is connected to a drain pipe 22 via a pipe. The intermediate-pressure booster 31 can also be connected to the controller 21, which controls the start and stop of the intermediate-pressure booster 31. By connecting the air inlet of the intermediate-pressure booster 31 to the maintenance low-pressure gas main 30, the existing low-pressure gas resources in the maintenance low-pressure gas main 30 can be fully utilized to increase the pressure at the air inlet of the intermediate-pressure booster 31, thereby improving the boosting efficiency of the intermediate-pressure booster 31. At the same time, it can also reduce the load on the intermediate-pressure booster 31, thus achieving energy saving and consumption reduction.

[0038] See Figure 1 The working principle of the air supply device for the speed governor hydraulic system provided in this application embodiment is as follows:

[0039] After the system is completely depressurized, it is repressurized and supplied with gas: The gas supply medium-pressure unit 101 and the booster medium-pressure unit 31 are started simultaneously. The gas supply medium-pressure unit 101 compresses the air through the three-stage compression process and delivers it to the medium-pressure gas tank 111 for storage. The booster medium-pressure unit 31 compresses the low-pressure air in the maintenance low-pressure gas main 30 and delivers it to the medium-pressure gas tank group 11 for storage. During this process, the pressure transmitter on the medium-pressure gas tank 111 monitors the pressure inside in real time and transmits the pressure data to the controller 21. When the pressure data received by the controller 21 exceeds the preset pressure, the controller 21 issues a shutdown command, and the gas supply medium-pressure unit 101 and the booster medium-pressure unit 31 stop.

[0040] Normal air supply under standard operating conditions: The medium-pressure air tank 111 stores compressed air at 7 MPa. Under pressure, the compressed air in the medium-pressure air tank 111 is delivered to the pressure tank 12 and finally to the pressure oil tank 13. During this process, the pressure transmitter on the medium-pressure air tank 111 monitors the pressure in real time and transmits the pressure data to the controller 21. When the pressure data received by the controller 21 is lower than the preset pressure, the controller 21 issues a start command for the medium-pressure air supply compressor. Upon receiving the start command, the medium-pressure air supply compressor 101 starts and delivers the air to the medium-pressure air tank 111 for storage after three stages of compression. When the pressure data received by the controller 21 exceeds the preset pressure, the controller 21 issues a stop command for the medium-pressure air supply compressor. Upon receiving the stop command, the medium-pressure air supply compressor 101 stops. Throughout the entire process, the booster compressor 31 remains in a stopped state.

[0041] The air supply device for the governor hydraulic system provided in this application embodiment, by adding a pressure boosting component, can significantly increase the air supply during the system's pressure boosting process when the governor hydraulic system needs to be repressurized after complete depressurization. This allows the system to reach the pressure required for stable unit operation in a shorter time, effectively shortening the pressure boosting time and avoiding major safety hazards such as unit instability or even shutdown that may be caused by pressure boosting delay.

[0042] In some embodiments, see Figure 1 , Figure 2 The boosting assembly also includes a first dehydration device 32. The outlet of the boosting intermediate compressor 31 is connected to the inlet of the intermediate pressure air tank group 11 through the first dehydration device 32. Accordingly, by setting the first dehydration device 32, the compressed air output from the boosting intermediate compressor 31 can be preliminarily dehydrated, reducing the moisture content of the air entering the intermediate pressure air tank 111. The first dehydration device 32 can be an air-water separator or other existing structures, as long as it can remove moisture from the compressed air; no specific limitation is made here.

[0043] In some embodiments, see Figure 1 , Figure 2The first dehydration device 32 includes a first refrigerated dryer 321 and a first gas-water separator 322. The air inlet of the first refrigerated dryer 321 is connected to the air outlet of the booster medium pressure machine 31, the air outlet of the first refrigerated dryer 321 is connected to the air inlet of the first gas-water separator 322, and the air outlet of the first gas-water separator 322 is connected to the air inlet of the medium pressure gas tank group 11.

[0044] Correspondingly, by setting up a first refrigerated dryer 321 and a first air-water separator 322, when compressed air enters the first refrigerated dryer 321, the temperature of the compressed air can be reduced by using refrigeration technology, causing the water vapor in the air to condense into liquid water, thereby achieving preliminary water removal. When the compressed air processed by the first refrigerated dryer 321 enters the first air-water separator 322, the residual liquid water is further separated. Through this dual water removal measure, the water content of the air entering the medium-pressure air tank 111 is reduced.

[0045] In some embodiments, see Figure 1 , Figure 2 A first check valve 33 and a first normally open valve 34 are sequentially provided on the pipeline between the outlet of the booster intermediate compressor 31 and the inlet of the first refrigerated dryer 321 along the gas conveying direction. A second normally open valve 35 is provided on the pipeline between the outlet of the first refrigerated dryer 321 and the inlet of the first gas-water separator 322. The inlet of the first normally open valve 34 is connected to the outlet of the second normally open valve 35 through a first spare pipe 36. A first normally closed valve 37 is provided on the first spare pipe 36.

[0046] Correspondingly, by installing a first check valve 33 on the pipeline between the outlet of the booster intermediate compressor 31 and the inlet of the first refrigerated dryer 321, the gas can only flow in the direction from the booster intermediate compressor 31 to the first refrigerated dryer 321, and cannot flow backward. By setting a first normally open valve 34, a second normally open valve 35, a first backup pipe 36, and a first normally closed valve 37, during operation, the first normally open valve 34 and the second normally open valve 35 remain open, and the first normally closed valve 37 remains closed. The gas passes through the first refrigerated dryer 321 and the first gas-water separator 322 in sequence for dehydration treatment before entering the intermediate pressure gas tank 111. When the first refrigerated dryer 321 malfunctions and needs repair or replacement, the first normally open valve 34 and the second normally open valve 35 can be closed, and the first normally closed valve 37 can be opened, allowing the gas to bypass the first refrigerated dryer 321 and directly enter the first gas-water separator 322 through the first backup pipe 36, thereby ensuring normal gas supply during the maintenance of the first refrigerated dryer 321.

[0047] The drain outlets of the first refrigerated dryer 321 and the first air-water separator 322 can be connected to the drain pipe 22, allowing the separated water to be centrally discharged into the drain pipe 22 and then discharged into a designated sewage system. The first refrigerated dryer 321 and the first air-water separator 322 can be connected to the controller 21. The controller 21 automatically adjusts the operating status of the first refrigerated dryer 321 and the first air-water separator 322, such as refrigeration temperature and operating time, based on preset parameters and real-time monitoring data. This automated control method reduces manual intervention and improves system operating efficiency.

[0048] In some embodiments, see Figure 1 , Figure 3 The air supply medium-pressure unit 10 includes multiple air supply medium-pressure units 101, and the outlet of each air supply medium-pressure unit 101 is connected to the inlet of the medium-pressure air tank group 11 through a second dehydration device 102. For example, the air supply medium-pressure unit 10 includes three air supply medium-pressure units 101, and each air supply medium-pressure unit 101 is connected to the inlet of the medium-pressure air tank group 11 through a second dehydration device 102. Accordingly, by setting the second dehydration device 102, the compressed air output from the air supply medium-pressure unit 101 can be preliminarily dehydrated, reducing the moisture content of the air entering the medium-pressure air tank 111. This reduces the moisture content in the air source and prevents the performance of the hydraulic oil in the pressure oil tank 13 from being affected by excessive moisture content. The second dehydration device 102 can be an air-water separator or other existing structures, as long as it can remove moisture from the compressed air; no specific limitation is made here.

[0049] In some embodiments, see Figure 3 The second dehydration device 102 includes a second refrigerated dryer 1021 and a second gas-water separator 1022. The air inlet of the second refrigerated dryer 1021 is connected to the air outlet of the medium-pressure gas supply unit 101, the air outlet of the second refrigerated dryer 1021 is connected to the air inlet of the second gas-water separator 1022, and the air outlet of the second gas-water separator 1022 is connected to the air inlet of the medium-pressure gas tank group 11.

[0050] Correspondingly, when atmospheric air is compressed by the intermediate-pressure air compressor 101, mechanical energy is converted into compressed air content, which leads to an increase in the temperature of the compressed air and a higher water content. By setting up a second refrigerated dryer 1021 and a second air-water separator 1022, when the compressed air enters the second refrigerated dryer 1021, the temperature of the compressed air can be lowered using refrigeration technology, causing the water vapor in the air to condense into liquid water, thereby achieving preliminary water removal. When the compressed air processed by the second refrigerated dryer 1021 enters the second air-water separator 1022, the residual liquid water is further separated. Through this dual water removal measure, the water content of the air entering the intermediate-pressure air tank 111 is reduced, the risk of corrosion of the air tank and related pipelines due to moisture is reduced, and the performance of the hydraulic oil is further guaranteed not to be affected by moisture.

[0051] In some embodiments, see Figure 3 A second check valve 103 and a third normally open valve 104 are sequentially installed on the pipeline between the outlet of the gas supply compressor 101 and the inlet of the second refrigerated dryer 1021 along the gas delivery direction. A fourth normally open valve 105 is installed on the pipeline between the outlet of the second refrigerated dryer 1021 and the inlet of the second gas-water separator 1022. The inlet of the third normally open valve 104 is connected to the outlet of the fourth normally open valve 105 through a second spare pipe 106. A second normally closed valve 107 is installed on the second spare pipe 106.

[0052] Correspondingly, by installing a second check valve 103 in the pipeline between the outlet of the gas supply compressor 101 and the inlet of the second refrigerated dryer 1021, the gas can only flow in the direction from the gas supply compressor 101 to the second refrigerated dryer 1021, and cannot flow backward. By setting a third normally open valve 104, a fourth normally open valve 105, a second backup pipe 106, and a second normally closed valve 107, during operation, the third normally open valve 104 and the fourth normally open valve 105 remain open, and the second normally closed valve 107 remains closed. The gas passes through the second refrigerated dryer 1021 and the second gas-water separator 1022 in sequence for dehydration treatment before entering the medium-pressure gas tank 111. When the second refrigerated dryer 1021 malfunctions and needs to be repaired or replaced, the third normally open valve 104 and the fourth normally open valve 105 can be closed, and the second normally closed valve 107 can be opened, allowing the gas to directly enter the second gas-water separator 1022 through the second backup pipe 106, thereby ensuring that the gas supply can still be normal during the maintenance of the second refrigerated dryer 1021.

[0053] The drain outlets of the second refrigerated dryer 1021 and the second air-water separator 1022 can be connected to the drain pipe 22, allowing the separated water to be centrally discharged into the drain pipe 22 and then discharged into a designated sewage system. The second refrigerated dryer 1021 and the second air-water separator 1022 can be connected to a controller 21, which can automatically adjust the operating status of the second refrigerated dryer 1021 and the second air-water separator 1022, such as refrigeration temperature and operating time, according to preset parameters and real-time monitoring data.

[0054] In some embodiments, see Figure 1 , Figure 3 The medium-pressure gas tank group 11 includes multiple medium-pressure gas tanks 111. The inlet of each medium-pressure gas tank 111 is connected to the medium-pressure gas header 14. The medium-pressure gas header 14 is connected to the outlet of the gas supply medium-pressure unit 10. The outlet of each medium-pressure gas tank 111 is connected to the medium-pressure gas supply header 15. The medium-pressure gas supply header 15 is connected to the inlet of the pressure tank 12. For example, the outlet of each second gas-water separator 1022 in the gas supply medium-pressure unit 10 is connected to the medium-pressure gas header 14, and the outlet of the first gas-water separator 322 is also connected to the medium-pressure gas header 14.

[0055] Correspondingly, the outlets of multiple second gas-water separators 1022 and the outlet of the first gas-water separator 322 are centrally connected through the medium-pressure gas header 14. This allows the compressed air generated by multiple gas supply medium-pressure compressors 101 and booster medium-pressure compressors 31 to be dehydrated before entering the medium-pressure gas header 14 and then being centrally transported to the medium-pressure gas tank 111. This structure improves the stability of gas pressure and flow rate within the medium-pressure gas tank 111, preventing fluctuations in the pressure from a single medium-pressure compressor or dehydration device from affecting the entire system.

[0056] In some embodiments, see Figure 1 The medium-pressure air supply main pipe 15 is connected to the air inlet of the pressure tank 12 via an automatic air replenishment valve assembly 16. Accordingly, the automatic air replenishment valve assembly 16 can automatically adjust the amount of air replenished to the pressure tank 12 according to the actual needs of the system, enabling the system to better adapt to different working conditions and operating conditions. This automation function reduces the need for manual intervention, reduces the workload and difficulty of operation for operators, and improves the operating efficiency and ease of operation of the system.

[0057] When the air supply device is not equipped with a water removal device, or when it is equipped but the water removal device is under maintenance, the medium-pressure compressor 101 will inevitably bring moisture from the air into the air supply device during the air compression process. Over time, liquid water may accumulate at the bottom of the medium-pressure tank 111 and the pressure tank 12, which will accelerate the corrosion of the related equipment of the air supply device and shorten its service life.

[0058] To mitigate corrosion of gas supply equipment and extend its service life, in some embodiments, see [reference needed]. Figure 1 , Figure 3 The medium-pressure gas tank 111 is equipped with a medium-pressure gas tank level sensor 17, and a medium-pressure gas tank electric drain valve 18 is located at the bottom of the medium-pressure gas tank 111. The pressure gas tank 12 is equipped with a pressure gas tank level sensor 19, and a pressure gas tank electric drain valve 20 is located at the bottom of the pressure gas tank 12. The medium-pressure gas tank level sensor 17, the medium-pressure gas tank electric drain valve 18, the pressure gas tank level sensor 19, and the pressure gas tank electric drain valve 20 are all connected to the controller 21. Among them, the medium-pressure gas tank electric drain valve 18 and the pressure gas tank electric drain valve 20 can be connected to the drain pipe 22.

[0059] During operation, the liquid level sensor 17 of the medium-pressure gas tank monitors the liquid water level in the medium-pressure gas tank 111 in real time and sends the monitored liquid level data to the controller 21. When the liquid level data received by the controller 21 exceeds the preset liquid level of the medium-pressure gas tank, the controller 21 sends an opening command to the electric drain valve 18 of the medium-pressure gas tank. After receiving the opening command, the electric drain valve 18 of the medium-pressure gas tank opens, thereby draining the liquid water in the medium-pressure gas tank 111. After the liquid water is drained, the electric drain valve 18 of the medium-pressure gas tank closes. At the same time, the liquid level sensor 19 of the pressure gas tank monitors the liquid water level in the pressure gas tank 12 in real time and sends the monitored liquid level data to the controller 21. When the liquid level data received by the controller 21 exceeds the preset liquid level of the pressure gas tank, the controller 21 sends an opening command to the electric drain valve 20 of the pressure gas tank. After receiving the opening command, the electric drain valve 20 of the pressure gas tank opens, thereby draining the liquid water in the pressure gas tank 12. After the liquid water is drained, the electric drain valve 20 of the pressure gas tank closes.

[0060] Correspondingly, by installing a medium-pressure gas tank level sensor 17 and a medium-pressure gas tank electric drain valve 18 on the medium-pressure gas tank 111, and installing a pressure gas tank level sensor 19 and a pressure gas tank electric drain valve 20 on the pressure gas tank 12, and connecting them to the controller 21, real-time monitoring and automatic discharge of liquid water in the medium-pressure gas tank 111 and the pressure gas tank 12 can be realized. This effectively avoids the long-term accumulation of liquid water at the bottom of the medium-pressure gas tank 111 and the pressure gas tank 12, thereby slowing down the corrosion of water on the hydraulic air supply system and extending its service life.

[0061] The air supply device for the speed controller hydraulic system provided in this application embodiment can be equipped with corresponding valves on each pipeline to meet different process requirements.

[0062] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.

Claims

1. A governor hydraulic system air supply device, comprising an air supply assembly, the air supply assembly comprising an air supply medium pressure unit (10), a medium pressure tank group (11), a pressure tank (12) and a pressure oil tank (13) in turn communicated; characterized in that, It also includes a pressure boosting assembly, which includes a maintenance low-pressure gas main (30) and a boosting medium-pressure unit (31). The air inlet of the boosting medium-pressure unit (31) is connected to the maintenance low-pressure gas main (30), and the air outlet of the boosting medium-pressure unit (31) is connected to the air inlet of the medium-pressure gas tank group (11).

2. The governor hydraulic system gas supply of claim 1, wherein, The pressurization assembly also includes a first dewatering device (32), and the outlet of the pressurization intermediate pressure unit (31) is connected to the inlet of the intermediate pressure gas tank group (11) through the first dewatering device (32).

3. The governor hydraulic system gas supply of claim 2, wherein, The first dehydration device (32) includes a first refrigerated dryer (321) and a first gas-water separator (322). The air inlet of the first refrigerated dryer (321) is connected to the air outlet of the booster medium pressure machine (31). The air outlet of the first refrigerated dryer (321) is connected to the air inlet of the first gas-water separator (322). The air outlet of the first gas-water separator (322) is connected to the air inlet of the medium pressure gas tank group (11).

4. The governor hydraulic system gas supply of claim 3, wherein, The pipe between the outlet of the booster compressor (31) and the inlet of the first refrigerated dryer (321) is provided with a first check valve (33) and a first normally open valve (34) in sequence along the gas delivery direction. The pipe between the outlet of the first refrigerated dryer (321) and the inlet of the first gas-water separator (322) is provided with a second normally open valve (35). The inlet of the first normally open valve (34) is connected to the outlet of the second normally open valve (35) through a first spare pipe (36). The first spare pipe (36) is provided with a first normally closed valve (37).

5. The governor hydraulic system gas supply of claim 1, wherein, The gas supply medium-pressure unit (10) includes multiple gas supply medium-pressure units (101), and the outlet of each gas supply medium-pressure unit (101) is connected to the inlet of the medium-pressure gas tank group (11) through a second water removal device (102).

6. The governor hydraulic system gas supply of claim 5, wherein, The second dehydration device (102) includes a second refrigerated dryer (1021) and a second gas-water separator (1022). The air inlet of the second refrigerated dryer (1021) is connected to the air outlet of the gas supply medium-pressure unit (101). The air outlet of the second refrigerated dryer (1021) is connected to the air inlet of the second gas-water separator (1022). The air outlet of the second gas-water separator (1022) is connected to the air inlet of the medium-pressure gas tank group (11).

7. The governor hydraulic system gas supply of claim 6, wherein, A second check valve (103) and a third normally open valve (104) are sequentially installed on the pipeline between the outlet of the gas supply compressor (101) and the inlet of the second refrigerated dryer (1021) along the gas delivery direction. A fourth normally open valve (105) is installed on the pipeline between the outlet of the second refrigerated dryer (1021) and the inlet of the second gas-water separator (1022). The inlet of the third normally open valve (104) is connected to the outlet of the fourth normally open valve (105) through a second spare pipe (106). A second normally closed valve (107) is installed on the second spare pipe (106).

8. The governor hydraulic system gas supply of claim 1, wherein, The medium-pressure gas tank group (11) includes multiple medium-pressure gas tanks (111). The air inlet of each medium-pressure gas tank (111) is connected to the medium-pressure gas main pipe (14). The medium-pressure gas main pipe (14) is connected to the air outlet of the gas supply medium-pressure unit (10). The air outlet of each medium-pressure gas tank (111) is connected to the medium-pressure gas supply main pipe (15). The medium-pressure gas supply main pipe (15) is connected to the air inlet of the pressure gas tank (12).

9. The governor hydraulic system gas supply of claim 8, wherein, The medium-pressure gas supply main pipe (15) is connected to the air inlet of the pressure gas tank (12) through the automatic gas replenishment valve group (16).

10. The governor hydraulic system gas supply of claim 8, wherein, The medium-pressure gas tank (111) is equipped with a medium-pressure gas tank level sensor (17), and the bottom of the medium-pressure gas tank (111) is equipped with a medium-pressure gas tank electric drain valve (18). The pressure gas tank (12) is equipped with a pressure gas tank level sensor (19), and the bottom of the pressure gas tank (12) is equipped with a pressure gas tank electric drain valve (20). The medium-pressure gas tank level sensor (17), the medium-pressure gas tank electric drain valve (18), the pressure gas tank level sensor (19), and the pressure gas tank electric drain valve (20) are all connected to the controller (21).

Images