Air supply device for hydraulic system of speed regulator

Abstract

The invention 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 particularly to a gas supply device for a governor hydraulic system. Background Art

[0002] The governor hydraulic system is an auxiliary control device for the stable operation of a hydro-generating unit. It ensures that the power station can efficiently and stably output electric energy by precisely controlling the speed of a water turbine or steam turbine. As an important part of the governor hydraulic system, the gas supply device is used to provide a stable gas source for the governor hydraulic system to ensure the stable operation of the governor system.

[0003] Currently, the hydraulic gas supply device usually consists of a medium-pressure compressor, a medium-pressure gas tank, a pressure gas tank, and a pressure oil tank connected in sequence. Among them, the medium-pressure compressor compresses air to a specific pressure and then transports it to the medium-pressure gas tank for storage. Under the action of pressure, the medium-pressure gas tank transports the gas to the pressure gas tank and finally reaches the pressure oil tank to supply stable hydraulic oil for the governor hydraulic system to meet the air pressure requirements for the normal operation of the system.

[0004] However, in actual operation, when the governor hydraulic system is completely depressurized and needs to be repressurized, the gas supply often fails to meet the gas consumption required for the governor hydraulic system to repressurize. This will cause the pressure of the system to be lower than the pressure required for the stable operation of the unit, thereby 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-generating unit. Summary of the Invention

[0005] The purpose of this application is to provide a gas supply device for a governor hydraulic system to solve the problem that when the governor hydraulic system is completely depressurized and needs to be repressurized, the system pressure is lower than the pressure required for the stable operation of the unit.

[0006] The technical solution adopted by this application to solve its technical problems is as follows:

[0007] A gas supply device for a governor hydraulic system includes a gas supply component. The gas supply component includes a gas supply medium-pressure unit, a medium-pressure gas tank group, a pressure gas tank, and a pressure oil tank that are connected in sequence. It further includes a pressure boosting component. The pressure boosting component includes a maintenance low-pressure gas main pipe and a pressure boosting medium-pressure compressor. The intake port of the pressure boosting medium-pressure compressor is connected to the maintenance low-pressure gas main pipe, and the outlet port of the pressure boosting medium-pressure compressor is connected to the intake port of the medium-pressure gas tank group.

[0008] Further, the pressure boosting component further includes a first water removal device. The outlet port of the pressure boosting medium-pressure compressor is connected to the intake port of the medium-pressure gas tank group through the first water removal device.

[0009] Further, the first water removal device includes a first cold dryer and a first gas-water separator. The inlet of the first cold dryer is communicated with the outlet of the step-up medium-pressure compressor. The outlet of the first cold dryer is communicated with the inlet of the first gas-water separator. The outlet of the first gas-water separator is communicated with the inlet of the medium-pressure gas tank group.

[0010] Further, a first check valve and a first normally open valve are sequentially arranged on the pipeline between the outlet of the step-up medium-pressure compressor and the inlet of the first cold dryer along the gas transmission direction. A second normally open valve is arranged on the pipeline between the outlet of the first cold dryer and the inlet of the first gas-water separator. The inlet of the first normally open valve is communicated with the outlet of the second normally open valve through a first standby pipe. A first normally closed valve is arranged on the first standby pipe.

[0011] Further, the medium-pressure gas supply unit includes a plurality of medium-pressure gas supply compressors. The outlet of each medium-pressure gas supply compressor is communicated with the inlet of the medium-pressure gas tank group through a second water removal device.

[0012] Further, the second water removal device includes a second cold dryer and a second gas-water separator. The inlet of the second cold dryer is communicated with the outlet of the medium-pressure gas supply compressor. The outlet of the second cold dryer is communicated with the inlet of the second gas-water separator. The outlet of the second gas-water separator is communicated with the inlet of the medium-pressure gas tank group.

[0013] Further, a second check valve and a third normally open valve are sequentially arranged on the pipeline between the outlet of the medium-pressure gas supply compressor and the inlet of the second cold dryer along the gas transmission direction. A fourth normally open valve is arranged on the pipeline between the outlet of the second cold dryer and the inlet of the second gas-water separator. The inlet of the third normally open valve is communicated with the outlet of the fourth normally open valve through a second standby pipe. A second normally closed valve is arranged on the second standby pipe.

[0014] Further, the medium-pressure gas tank group includes a plurality of medium-pressure gas tanks. The inlet of each medium-pressure gas tank is communicated with a medium-pressure gas main pipe. The medium-pressure gas main pipe is communicated with the outlet of the medium-pressure gas supply unit. The outlet of each medium-pressure gas tank is communicated with a medium-pressure gas supply main pipe. The medium-pressure gas supply main pipe is communicated with the inlet of the pressure gas tank.

[0015] Further, the medium-pressure gas supply main pipe is communicated with the inlet of the pressure gas tank through an automatic air replenishment valve group.

[0016] Further, a medium-pressure gas tank level sensor is provided on the medium-pressure gas tank, an electric drain valve for the medium-pressure gas tank is provided at the bottom of the medium-pressure gas tank, a pressure gas tank level sensor is provided on the pressure gas tank, an electric drain valve for the pressure gas tank is provided at the bottom of the pressure gas tank, and the medium-pressure gas tank level sensor, the electric drain valve for the medium-pressure gas tank, the pressure gas tank level sensor, and the electric drain valve for the pressure gas tank are all connected to the controller.

[0017] Advantages of this application:

[0018] The air supply device for the governor hydraulic system provided by the embodiment of this application can continuously and stably supply the air source required for the normal operation of the governor hydraulic system by using the air supply component, ensuring that the system always maintains a good working state under normal operating conditions; by adding a boosting component, when the governor hydraulic system needs to be re-pressurized after being completely depressurized, the air supply component and the boosting component are used to supply air in coordination, greatly increasing the air supply volume during the system boosting process, enabling the system to reach the pressure required for the stable operation of the unit in a short time, effectively shortening the boosting time, and avoiding major safety hazards such as unstable unit operation or even shutdown that may be caused by boosting delay. By connecting the air inlet of the boosting medium-pressure compressor to the maintenance low-pressure gas supply main pipe, this application can make full use of the existing low-pressure gas resources in the maintenance low-pressure gas supply main pipe, improve the boosting efficiency, and reduce the load of the boosting medium-pressure compressor. Description of the drawings

[0019] In order to more clearly illustrate the technical solutions of the embodiments of this application, the drawings required for use 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 limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 is a schematic structural diagram of the air supply device for the governor hydraulic system provided by the embodiment of this application;

[0021] Figure 2 is a schematic structural diagram of the boosting component;

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

[0023] Reference numerals:

[0024] 10 - Air supply medium-pressure unit;

[0025] 101 - Medium-pressure compressor for air supply; 102 - Second water removal device; 1021 - Second refrigerant 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 group; 111 - Medium-pressure gas tank; 12 - Pressure gas tank; 13 - Pressure oil tank; 14 - Medium-pressure gas main pipe; 15 - Medium-pressure air supply main pipe; 16 - Automatic air make-up valve group; 17 - Medium-pressure gas tank liquid level sensor; 18 - Medium-pressure gas tank electric drain valve; 19 - Pressure gas tank liquid level sensor; 20 - Pressure gas tank electric drain valve; 21 - Controller; 22 - Drain pipe;

[0027] 30 - Maintenance low-pressure gas use dry pipe; 31 - Boosting medium-pressure compressor; 32 - First water removal device; 321 - First refrigerant 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 manners

[0028] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application. Without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other.

[0029] In the description of the present application, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application. Without special instructions, in the case of satisfying the relative positional relationship shown in the accompanying drawings, the above-mentioned orientation description can be flexibly set during the actual application process.

[0030] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0031] See Figure 1 Figure 1 , an air supply device for a hydraulic governor system according to an embodiment of the present application includes an air supply assembly, and the air supply assembly includes an air supply medium-pressure unit 10, a medium-pressure gas tank group 11, a pressure gas tank 12, and a pressure oil tank 13 that are connected in sequence; it further includes a boosting assembly, and the boosting assembly includes a maintenance low-pressure gas supply main pipe 30 and a boosting medium-pressure machine 31. The air inlet of the boosting medium-pressure machine 31 is connected to the maintenance low-pressure gas supply main pipe 30, and the air outlet of the boosting medium-pressure machine 31 is connected to the air inlet of the medium-pressure gas tank group 11.

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

[0033] The air supply medium-pressure unit 10 may include at least two air supply medium-pressure machines 101. The air inlet of each air supply medium-pressure machine 101 is directly connected to the atmosphere for sucking air from the outside; the air outlet of each air supply medium-pressure machine 101 is connected to the air inlet of the medium-pressure gas tank group 11 through a pipeline. Thus, the air supply medium-pressure machine 101 can compress the air to a specific pressure and then transport it into the medium-pressure gas tank group 11 for storage; a drain port is also provided at the bottom of each air supply medium-pressure machine 101 for discharging the waste water generated during the operation of the air supply medium-pressure machine 101. These waste waters mainly come from the condensation of moisture in the air during the compression process. Among them, the drain port of each air supply medium-pressure machine 101 can be connected to the drain pipe 22 through a pipeline. The medium-pressure gas tank group 11 may include at least one medium-pressure gas tank 111. Exemplarily, three air supply medium-pressure machines 101 are used to compress the air to 7 MPa and then transport it into two medium-pressure gas tanks 11 of the medium-pressure gas tank group 11 for storage.

[0034] The air outlet of the medium-pressure gas tank group 11 is connected to the air inlet of the pressure gas tank 12 through a pipeline, the air outlet of the pressure gas tank 12 is connected to the air inlet of the pressure oil tank 13 through a pipeline, the upper part of the inner cavity of the pressure oil tank 13 is connected to its air inlet, and hydraulic oil is stored in the lower part of the inner cavity of the pressure oil tank 13. The medium-pressure gas tank group 11 can transport the compressed air stored therein into the pressure gas tank 12 under the action of pressure and finally reach the pressure oil tank 13 to adjust the pressure and oil volume in the pressure oil tank 13 so as to use the pressure oil tank 13 to provide stable hydraulic oil for the governor system.

[0035] A pressure transmitter is provided on the medium-pressure gas tank 111 of the medium-pressure gas tank group 11. Both the pressure transmitter and the gas supply medium-pressure compressor 101 are connected to the controller 21. The pressure transmitter can be used to monitor the pressure in the medium-pressure gas tank 111 in real time and send the pressure data to the controller 21. When the pressure in 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 gas supply medium-pressure compressor, and after receiving the command, the gas supply medium-pressure compressor 101 starts and conveys the air to be stored in the medium-pressure gas tank 111 after three-stage compression by the main body. Among them, the controller 21 includes but is not limited to a PLC controller.

[0036] See Figure 1 , the boosting component is used to provide the gas source required for rapid boosting when the governor hydraulic system is completely depressurized and then re-boosted, so as to shorten the boosting time. The boosting component mainly includes a maintenance low-pressure gas supply main pipe 30 and a boosting medium-pressure compressor 31.

[0037] Among them, the maintenance low-pressure gas supply main pipe 30 is the gas pipeline for each section in the workshop, and low-pressure air is stored therein; for example, the maintenance low-pressure gas supply main pipe 30 stores compressed air at 0.8 MPa. The air inlet of the boosting medium-pressure compressor 31 is communicated with the maintenance low-pressure gas supply main pipe 30 and is used to suck the low-pressure air from the maintenance low-pressure gas supply main pipe 30. The air outlet of the boosting medium-pressure compressor 31 is communicated with the air inlet of the medium-pressure gas tank group 11 through a pipeline. Thus, the boosting medium-pressure compressor 31 can be used to compress the low-pressure air in the maintenance low-pressure gas supply main pipe 30 to a specific pressure and then convey it to be stored in the medium-pressure gas tank group 11. A sewage discharge port is also provided at the bottom of the boosting medium-pressure compressor 31 for discharging the waste water generated during the operation of the boosting medium-pressure compressor 31. Among them, the sewage discharge port of the boosting medium-pressure compressor 31 can be communicated with the sewage pipe 22 through a pipeline. The boosting medium-pressure compressor 31 can also be connected to the controller 21, and the controller 21 is used to control the start and stop of the boosting medium-pressure compressor 31. By communicating the air inlet of the boosting medium-pressure compressor 31 with the maintenance low-pressure gas supply main pipe 30, the existing low-pressure gas resources in the maintenance low-pressure gas supply main pipe 30 can be fully utilized, the pressure at the air inlet of the boosting medium-pressure compressor 31 can be increased, and thus the boosting efficiency of the boosting medium-pressure compressor 31 can be improved. At the same time, the load of the boosting medium-pressure compressor 31 can also be reduced, playing a role in energy conservation and consumption reduction.

[0038] See Figure 1 , the working principle of the governor hydraulic system gas supply device provided by the embodiment of the present application is:

[0039] After the system is completely depressurized and then repressurized for gas supply: Start the gas supply medium-pressure compressor 101 and the pressure-boosting medium-pressure compressor 31 simultaneously. The gas supply medium-pressure compressor 101 compresses air through three stages of the main body and transports it to the medium-pressure gas tank 111 for storage. The pressure-boosting medium-pressure compressor 31 compresses the low-pressure air in the maintenance low-pressure gas pipeline 30 and transports 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 it 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 compressor 101 and the pressure-boosting medium-pressure compressor 31 stop.

[0040] Normal gas supply under normal conditions: The medium-pressure gas tank 111 stores compressed air at 7 MPa. The medium-pressure gas tank 111 transports the compressed air inside it to the pressure gas tank 12 under the action of pressure and finally reaches the pressure oil tank 13. During this process, the pressure transmitter on the medium-pressure gas tank 111 monitors the pressure inside it 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 gas supply medium-pressure compressor. After receiving the start command, the gas supply medium-pressure compressor 101 starts and compresses air through three stages of the main body and transports it to the medium-pressure gas tank 111 for storage. When the pressure data received by the controller 21 exceeds the preset pressure, the controller 21 issues a shutdown command for the gas supply medium-pressure compressor, and the gas supply medium-pressure compressor 101 stops after receiving the shutdown command. During the whole process, the pressure-boosting medium-pressure compressor 31 is always in a shutdown state.

[0041] The gas supply device for the governor hydraulic system provided by the embodiment of the present application adds a pressure-boosting component. When the governor hydraulic system needs to be repressurized after being completely depressurized, the gas supply component and the pressure-boosting component cooperate to supply gas, greatly improving the gas supply volume during the system pressure-boosting process, enabling the system to reach the pressure required for stable operation of the unit in a short time, effectively shortening the pressure-boosting time, and avoiding major safety hazards such as unstable unit operation or even shutdown caused by pressure-boosting delay.

[0042] In some embodiments, refer to Figure 1 、 Figure 2 The pressure-boosting component further includes a first water removal device 32. The air outlet of the pressure-boosting medium-pressure compressor 31 is connected to the air inlet of the medium-pressure gas tank group 11 through the first water removal device 32. Correspondingly, by setting the first water removal device 32, the compressed air output by the pressure-boosting medium-pressure compressor 31 can be preliminarily treated for water removal, reducing the water content of the air entering the medium-pressure gas tank 111. Among them, the first water removal device 32 can be a gas-liquid separator or other existing structures, as long as it can remove the moisture in the compressed air, and no specific limitation is made here.

[0043] In some embodiments, refer to Figure 1 、 Figure 2, the first water removal 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 communicated with the air outlet of the step-up medium-pressure compressor 31, the air outlet of the first refrigerated dryer 321 is communicated with the air inlet of the first gas-water separator 322, and the air outlet of the first gas-water separator 322 is communicated with the air inlet of the medium-pressure gas tank group 11.

[0044] Correspondingly, by providing the first refrigerated dryer 321 and the first gas-water separator 322, when the compressed air enters the first refrigerated dryer 321, the refrigeration technology can be used to lower the temperature of the compressed air, so that the water vapor in the air condenses into liquid water, thereby achieving preliminary water removal. When the compressed air processed by the first refrigerated dryer 321 enters the first gas-water separator 322, the remaining liquid water is further separated; through this double water removal measure, the water content of the air entering the medium-pressure gas tank 111 is reduced.

[0045] In some embodiments, referring to Figure 1 , Figure 2 , a first check valve 33 and a first normally open valve 34 are sequentially provided on the pipeline between the air outlet of the step-up medium-pressure compressor 31 and the air inlet of the first refrigerated dryer 321 along the gas transmission direction. A second normally open valve 35 is provided on the pipeline between the air outlet of the first refrigerated dryer 321 and the air inlet of the first gas-water separator 322. The inlet of the first normally open valve 34 is communicated with the outlet of the second normally open valve 35 through a first standby pipe 36, and a first normally closed valve 37 is provided on the first standby pipe 36.

[0046] Correspondingly, by providing the first check valve 33 on the pipeline between the air outlet of the step-up medium-pressure compressor 31 and the air inlet of the first refrigerated dryer 321, the gas can only flow in the direction from the step-up medium-pressure compressor 31 to the first refrigerated dryer 321 and cannot flow backward. By providing the first normally open valve 34, the second normally open valve 35, the first standby pipe 36 and the first normally closed valve 37, during operation, the first normally open valve 34 and the second normally open valve 35 are kept open, and the first normally closed valve 37 is kept closed. The gas passes through the first refrigerated dryer 321 and the first gas-water separator 322 in sequence for water treatment and then enters the medium-pressure gas tank 111; when the first refrigerated dryer 321 fails and needs to be repaired or replaced, 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, so that the gas bypasses the first refrigerated dryer 321 through the first standby pipe 36 and directly enters the first gas-water separator 322, thereby ensuring normal gas supply during the repair of the first refrigerated dryer 321.

[0047] The drain outlet of the first cold dryer 321 and the drain outlet of the first gas-water separator 322 can be connected to the sewage discharge pipe 22, so that the separated water can be centrally discharged into the sewage discharge pipe 22, and then discharged into the designated sewage system through the sewage discharge pipe 22. The first cold dryer 321 and the first gas-water separator 322 can be connected to the controller 21. The controller 21 automatically adjusts the operating states of the first cold dryer 321 and the first gas-water separator 322, such as the refrigeration temperature, operating time, etc., according to the preset parameters and real-time monitoring data. This automatic control method can reduce manual intervention and improve the operating efficiency of the system.

[0048] In some embodiments, refer to Figure 1 , Figure 3 , the medium-pressure air supply unit 10 includes a plurality of medium-pressure air supply machines 101. The air outlet of each medium-pressure air supply machine 101 is connected to the air inlet of the medium-pressure gas tank group 11 through a second water removal device 102. For example, the medium-pressure air supply unit 10 includes three medium-pressure air supply machines 101, and the air outlet of each medium-pressure air supply machine 101 is connected to the air inlet of the medium-pressure gas tank group 11 through a second water removal device 102. Correspondingly, by providing the second water removal device 102, the compressed air output by the medium-pressure air supply machine 101 can be preliminarily treated for water removal, reducing the water content of the air entering the medium-pressure gas tank 111. Thus, the water content in the gas source can be reduced, preventing the water content in the pressure oil tank 13 from exceeding the standard and affecting the performance of the hydraulic oil in the pressure oil tank 13. The second water removal device 102 can be a gas-water separator or other existing structures, as long as it can remove the water in the compressed air, and no specific limitation is made here.

[0049] In some embodiments, refer to Figure 3 , the second water removal device 102 includes a second cold dryer 1021 and a second gas-water separator 1022. The air inlet of the second cold dryer 1021 is connected to the air outlet of the medium-pressure air supply machine 101, the air outlet of the second cold 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, after the air in the atmosphere is compressed by the air supply medium-pressure compressor 101, the mechanical energy is converted into the content of compressed air, which will cause the temperature of the compressed air to rise, resulting in a relatively high water content in the compressed air. By setting the second cold dryer 1021 and the second air-water separator 1022, when the compressed air enters the second cold dryer 1021, the refrigeration technology can be used to lower the temperature of the compressed air, condense the water vapor in the air into liquid water, so as to achieve preliminary water removal. When the compressed air processed by the second cold dryer 1021 enters the second air-water separator 1022, the remaining liquid water is further separated. Through this double water removal measure, the water content of the air entering the medium-pressure air tank 111 is reduced, the risk of moisture corrosion of the air tank and related pipelines is reduced, and the performance of the hydraulic oil is further ensured not to be affected by moisture.

[0051] In some embodiments, referring to Figure 3 , a second check valve 103 and a third normally open valve 104 are sequentially arranged on the pipeline between the air outlet of the air supply medium-pressure compressor 101 and the air inlet of the second cold dryer 1021 along the gas transmission direction. A fourth normally open valve 105 is arranged on the pipeline between the air outlet of the second cold dryer 1021 and the air inlet of the second air-water separator 1022. The inlet of the third normally open valve 104 is communicated with the outlet of the fourth normally open valve 105 through a second standby pipe 106, and a second normally closed valve 107 is arranged on the second standby pipe 106.

[0052] Correspondingly, by setting the second check valve 103 on the pipeline between the air outlet of the air supply medium-pressure compressor 101 and the air inlet of the second cold dryer 1021, the gas can only flow in the direction from the air supply medium-pressure compressor 101 to the second cold dryer 1021 and cannot flow backward. By setting the third normally open valve 104, the fourth normally open valve 105, the second standby pipe 106 and the second normally closed valve 107, during operation, the third normally open valve 104 and the fourth normally open valve 105 are kept open, and the second normally closed valve 107 is kept closed. The gas passes through the second cold dryer 1021 and the second air-water separator 1022 in sequence for water treatment and then enters the medium-pressure air tank 111; when the second cold dryer 1021 fails 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 to make the gas directly enter the second air-water separator 1022 through the second standby pipe 106, so as to ensure normal air supply during the repair of the second cold dryer 1021.

[0053] The drain outlet of the second refrigerant dryer 1021 and the drain outlet of the second gas-water separator 1022 can be connected to the sewage pipe 22, enabling the separated water to be centrally discharged into the sewage pipe 22 and then discharged into the designated sewage system through the sewage pipe 22. The second refrigerant dryer 1021 and the second gas-water separator 1022 can be connected to the controller 21, which can automatically adjust the operating states of the second refrigerant dryer 1021 and the second gas-water separator 1022, such as the refrigeration temperature, operating time, etc., according to the preset parameters and real-time monitoring data.

[0054] In some embodiments, referring to 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 main pipe 14, the medium-pressure gas main pipe 14 is connected to the outlet of the medium-pressure gas supply unit 10, the outlet of each medium-pressure gas tank 111 is connected to the medium-pressure gas supply main pipe 15, and the medium-pressure gas supply main pipe 15 is connected to the inlet of the pressure gas tank 12. Exemplarily, the outlet of each second gas-water separator 1022 in the medium-pressure gas supply unit 10 is connected to the medium-pressure gas main pipe 14, and the outlet of the first gas-water separator 322 is connected to the medium-pressure gas main pipe 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 main pipe 14, enabling the compressed air generated by multiple medium-pressure gas supply machines 101 and boost medium-pressure gas machines 31 to enter the medium-pressure gas main pipe 14 uniformly after water treatment and then be centrally transported to the medium-pressure gas tank 111. This structure can improve the stability of the gas pressure and flow rate in the medium-pressure gas tank 111 and avoid the impact on the entire system caused by the fluctuations of a single medium-pressure gas machine or water treatment device.

[0056] In some embodiments, referring to Figure 1 , the medium-pressure gas supply main pipe 15 is connected to the inlet of the pressure gas tank 12 through the automatic air makeup valve group 16. Correspondingly, the automatic air makeup valve group 16 can automatically adjust the air makeup volume supplemented to the pressure gas tank 12 according to the actual needs of the system, enabling the system to better adapt to different working conditions and operating conditions. This automated function reduces the need for manual intervention, lowers the work intensity and operation difficulty of the operators, and improves the operating efficiency and convenience of the system.

[0057] When there is no water treatment device installed on the gas supply device, or when the water treatment device is under maintenance, during the process of compressing air by the medium-pressure gas supply machine 101, it is inevitable to bring the moisture in the air into the gas supply device. Over time, liquid water may accumulate at the bottom of the medium-pressure gas tank 111 and the pressure gas tank 12, which will accelerate the corrosion of the relevant equipment of the gas supply device and shorten its service life.

[0058] In order to slow down the corrosion of the equipment related to the air supply device and improve its service life, in some embodiments, refer to Figure 1 , Figure 3 , a medium-pressure gas tank liquid level sensor 17 is provided on the medium-pressure gas tank 111, a medium-pressure gas tank electric drain valve 18 is provided at the bottom of the medium-pressure gas tank 111, a pressure gas tank liquid level sensor 19 is provided on the pressure gas tank 12, and a pressure gas tank electric drain valve 20 is provided at the bottom of the pressure gas tank 12. The medium-pressure gas tank liquid level sensor 17, the medium-pressure gas tank electric drain valve 18, the pressure gas tank liquid 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 communicated with the sewage pipe 22.

[0059] During operation, the medium-pressure gas tank liquid level sensor 17 is used to monitor the liquid level height of the liquid water in the medium-pressure gas tank 111 in real time, and the monitored liquid level data is sent 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 instruction to the medium-pressure gas tank electric drain valve 18. After receiving the opening instruction, the medium-pressure gas tank electric drain valve 18 opens, and then the liquid water in the medium-pressure gas tank 111 is drained away. After the liquid water is drained away, the medium-pressure gas tank electric drain valve 18 closes; at the same time, the pressure gas tank liquid level sensor 19 is used to monitor the liquid level height of the liquid water in the pressure gas tank 12 in real time, and the monitored liquid level data is sent 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 instruction to the pressure gas tank electric drain valve 20. After receiving the opening instruction, the pressure gas tank electric drain valve 20 opens, and then the liquid water in the pressure gas tank 12 is drained away. After the liquid water is drained away, the pressure gas tank electric drain valve 20 closes.

[0060] Correspondingly, by providing a medium-pressure gas tank liquid level sensor 17 and a medium-pressure gas tank electric drain valve 18 on the medium-pressure gas tank 111, a pressure gas tank liquid 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, it is possible to realize the real-time monitoring and automatic discharge of the liquid water in the medium-pressure gas tank 111 and the pressure gas tank 12, effectively avoiding 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 the moisture on the equipment related to the hydraulic air supply system and extending its service life.

[0061] In the air supply device of the governor hydraulic system provided by the embodiment of the present application, corresponding valves can be provided on each pipeline therein to meet different process requirements.

[0062] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present application should be covered by the protection scope of the present application.

Claims

1. A gas supply device for a speed governor hydraulic system, comprising a gas supply assembly, wherein the gas supply assembly comprises a gas supply medium-pressure unit (10), a medium-pressure gas tank unit (11), a pressure gas tank (12) and a pressure oil tank (13) connected in sequence; characterized in that: It also includes a boosting component, which includes a low-pressure gas main pipe (30) for maintenance and a boosting medium-pressure machine (31), the air inlet of the boosting medium-pressure machine (31) is connected to the low-pressure gas main pipe (30) for maintenance, and the air outlet of the boosting medium-pressure machine (31) is connected to the air inlet of the medium-pressure gas tank group (11).

2. The air supply device for the hydraulic system of the speed governor according to claim 1, characterized in that: The boosting assembly further comprises a first water removal device (32), and the air outlet of the boosting medium-pressure machine (31) is connected to the air inlet of the medium-pressure gas tank group (11) through the first water removal device (32).

3. The air supply device for the speed governor hydraulic system according to claim 2, characterized in that: The first water removal device (32) comprises a first cold dryer (321) and a first gas-water separator (322); the air inlet of the first cold dryer (321) is connected to the air outlet of the boost medium-pressure machine (31); the air outlet of the first cold 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).

4. The air supply device for the hydraulic system of the speed governor according to claim 3, characterized in that: A first check valve (33) and a first normally open valve (34) are provided in sequence on the pipeline between the gas outlet of the boost medium-pressure machine (31) and the gas inlet of the first cold dryer (321) along the gas delivery direction; a second normally open valve (35) is provided on the pipeline between the gas outlet of the first cold dryer (321) and the gas 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); and a first normally closed valve (37) is provided on the first spare pipe (36).

5. The air supply device for the hydraulic system of the speed governor according to claim 1, characterized in that: The medium-pressure gas supply unit (10) comprises a plurality of medium-pressure gas supply units (101), and the gas outlet of each medium-pressure gas supply unit (101) is connected to the gas inlet of the medium-pressure gas tank unit (11) via a second water removal device (102).

6. The air supply device for the hydraulic system of the speed governor according to claim 5, characterized in that: The second water removal device (102) comprises a second cold dryer (1021) and a second gas-water separator (1022); the air inlet of the second cold dryer (1021) is connected to the air outlet of the medium-pressure air supply machine (101); the air outlet of the second cold 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).

7. The air supply device for the speed governor hydraulic system according to claim 6, characterized in that: A second check valve (103) and a third normally open valve (104) are provided in sequence on the pipeline between the gas outlet of the gas supply medium-pressure machine (101) and the gas inlet of the second cold dryer (1021) along the gas delivery direction, and a fourth normally open valve (105) is provided on the pipeline between the gas outlet of the second cold dryer (1021) and the gas 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), and a second normally closed valve (107) is provided on the second spare pipe (106).

8. The air supply device for the hydraulic system of the speed governor according to claim 1, characterized in that: The medium-pressure gas tank group (11) comprises a plurality of medium-pressure gas tanks (111), the air inlet of each of the medium-pressure gas tanks (111) being connected to a medium-pressure gas main pipe (14), the medium-pressure gas main pipe (14) being connected to an air outlet of the gas supply medium-pressure unit (10), the air outlet of each of the medium-pressure gas tanks (111) being connected to a medium-pressure gas supply main pipe (15), the medium-pressure gas supply main pipe (15) being connected to an air inlet of the pressure gas tank (12).

9. The air supply device for the hydraulic system of the speed governor according to claim 8, characterized in that: The medium-pressure gas supply main pipe (15) is connected to the gas inlet of the pressure gas tank (12) through an automatic gas supply valve group (16).

10. The air supply device for the hydraulic system of the speed governor according to claim 8, characterized in that: The medium-pressure gas tank (111) is provided with a medium-pressure gas tank liquid level sensor (17), the bottom of the medium-pressure gas tank (111) is provided with a medium-pressure gas tank electric drain valve (18), the pressure gas tank (12) is provided with a pressure gas tank liquid level sensor (19), the bottom of the pressure gas tank (12) is provided with a pressure gas tank electric drain valve (20), and the medium-pressure gas tank liquid level sensor (17), the medium-pressure gas tank electric drain valve (18), the pressure gas tank liquid level sensor (19) and the pressure gas tank electric drain valve (20) are all connected to a controller (21).

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