Dehumidification method for crane equipment operation and maintenance in humid environment of tailwater surge tank in hydropower station

Abstract

A method for dehumidifying crane equipment in a humid environment within the tailrace surge chamber of a hydropower station involves several steps: equipment placement design, isolation room layout, gap sealing design, and heating and dehumidification control within the isolation rooms. The method utilizes a main air supply pipe connected to the air inlet of a sealing strip. An electric ball valve in the control circuit pressurizes the sealing strip. After inflation, the sealing strip expands and contacts the bottom sill of the upper isolation room's roller shutter, the side beams of the fixed isolation plate, the top plate of the isolation wall, and the frame of the double-leaf movable door, resulting in compression. This effectively seals the gaps, forming a unified structure between the upper and lower isolation rooms. This prevents cold air from entering the isolation rooms, creating a safe working environment for the equipment in a humid environment, ensuring the safe operation of the mechanical equipment's metal structure and electrical components, reducing the workload of daily maintenance personnel, lowering equipment safety hazards and quality risks, and ensuring safe equipment operation.

Description

Technical Field

[0001] This invention belongs to the field of dehumidification technology for the operation and maintenance of surge tanks in hydropower stations, and relates to a method for dehumidification of crane equipment in the humid environment of the tailrace surge tank of a hydropower station. Background Technology

[0002] For hydroelectric power stations with underground powerhouses, to save on excavation costs, the tailrace surge chamber and maintenance access chamber are often housed in a single chamber (collectively called the tailrace surge chamber). This means that the two chambers share one access chamber, leading to increased humidity in the maintenance access chamber due to water vapor generated by the river flowing through it. Some hydroelectric power stations permanently house cranes for opening and closing maintenance doors in their tailrace surge chambers. When maintenance of the turbine units is required, the cranes are used to open and close the corresponding unit's maintenance doors, effectively blocking downstream river water from entering the water diversion and generation channels, thus providing safe maintenance conditions for the equipment within the flow area. Meanwhile, the underground cavern is greatly affected by seasonal climate. In summer, the humidity inside the cavern reaches 100%, with visible water droplets on the equipment's exterior surfaces. This leads to severe corrosion of the crane's metal structure and connecting high-strength bolts, posing a serious threat to the crane's safe operation. Furthermore, the opening and closing of the maintenance doors cannot be performed using other backup lifting equipment. If the crane malfunctions, it will be impossible to find an alternative solution to open and close the maintenance doors in a timely manner, severely impacting the hydropower station's production and operation. Based on the actual site conditions, dehumidifying the entire tailrace chamber would be extremely difficult and extensive, and its cost-effectiveness would be low. Creating a dry parking environment in a humid environment to ensure the safe operation of the crane's metal structure and electrical components is a pressing issue that needs to be addressed. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a method for dehumidifying crane equipment in the humid environment of the tailrace surge chamber of a hydropower station. This method creates a working environment that meets the requirements for long-term safe parking of the equipment in a humid environment, ensures the safe operation of the metal structure and electrical components of the mechanical equipment, reduces the daily maintenance workload of the staff, reduces equipment safety hazards and quality risks, and ensures the safe operation of the equipment.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a method for dehumidifying crane equipment in a humid environment in the tailrace surge chamber of a hydropower station, which includes the following steps:

[0005] Step 1, Equipment parking location design: Design a safe area for long-term parking of the lifting equipment in the equipment operating area environment, without interfering with other equipment;

[0006] Step 2, Isolation Room Setup: An isolation room is set up in the equipment parking area to provide large-area shielding and protection for the equipment, prevent the internal isolation area from communicating with the external humid environment, facilitate the control of the local humid environment in the isolation room, and ensure the safe operation of the equipment and facilities.

[0007] Step 3, gap sealing design: In view of the fact that the crane needs to move left and right in the entire tail adjustment chamber, a gap sealing isolation zone is adopted to block the outside air and ensure that the environment in the isolation zone is dry.

[0008] Step 4: Heating and dehumidifying the isolation room. Install heating and dehumidifying equipment in the isolation area to ensure a dry environment and safe operation of the equipment.

[0009] Step 5: Control. A PLC control system is used to control the air pressure of the gap seal in the isolation chamber and the start and stop of the dehumidifier to ensure that the environment in the isolation chamber is controlled and that the equipment is in a dry and safe environment.

[0010] In the preferred embodiment, in step 1, the water flowing through the generator unit flows to the tailrace control room through the tailrace pipe. After pressure regulation in the tailrace control room, it flows into the downstream river water through the tailrace tunnel. The tailrace tunnel is arranged in a 3-unit-1-tunnel pattern. An intermediate isolation wall can be set between every 3 generator units. The top of the isolation wall cannot be poured to the top and a hydraulic grab beam passage is reserved on both sides.

[0011] In the preferred embodiment, step 2 mainly consists of two parts: an upper isolation room and a lower passage isolation room. The upper isolation room provides a safe and effective parking area for the crane body and fixed equipment on the crane. The isolation method for this area is to directly construct a fixed isolation room on the concrete foundation supporting the crane rails, and set up clearance passages for the crane to travel on the left and right sides. The clearance passages are closed by roller doors, directly enclosing the crane body and electrical equipment inside the isolation room. This ensures that the main structural components and control components of the crane are always in a good operating environment, guaranteeing the safety of the core components of the crane equipment. At the same time, passage doors for personnel to pass through are set up on both sides of the fixed isolation room.

[0012] In the preferred embodiment, in step 2, the lower passage isolation room provides a safe and effective parking area for the hydraulic grab beam connected by the steel wire rope below the crane. The isolation method for this area is to directly erect fixed isolation panels on the left and right sides of the top of the middle partition wall, and reserve a passage for the hydraulic grab beam to move left and right in the middle of the left and right sides. The passage is closed by a movable plane door. The hydraulic system automatically opens and closes the plane door as needed, so that the hydraulic grab beam is effectively isolated in the area, ensuring the safe use of the main structural components of the hydraulic grab beam. The lower isolation room should be integrated with the upper isolation room. With the cooperation of the upper and lower isolation rooms, a parking room suitable for long-term equipment parking is created in a humid environment.

[0013] In the preferred embodiment, in step 2, to facilitate observation of the crane's external environment, the upper isolation chamber is constructed using transparent materials, with a condensate collection trough installed around the top, discharging the condensate into the river water via a pre-installed drain pipe. The lower isolation chamber has two symmetrically opening movable doors located in the middle of its left and right sides, with an opening greater than the cross-sectional dimensions of the hydraulic grab beam. This ensures that the hydraulic grab beam does not interfere with the movement of the lower isolation chamber. The automatic opening of the movable doors is primarily controlled by a hydraulic system. Simultaneously, retractable seals are installed around the movable doors, effectively sealing the contact surfaces under the control of the system program, effectively isolating them from the humid external environment.

[0014] In the preferred embodiment, there are two main types of gaps in step 3;

[0015] One type is a gap that can be directly overlapped and contacted. The sealing method for this part is to directly install a sealing strip on the moving contact part for sealing, such as the sealing between the roller door of the isolation room and the upper isolation room part, and the sealing between the passage door and the upper isolation room part.

[0016] Another type is the gap where the interface between the upper and lower isolation chambers cannot be directly contacted. The sealing method for this part is designed to be a pressurized telescopic sealing strip. Pressurized telescopic sealing strip bases are installed around the movable doors on both sides of the lower isolation chamber. Then, the sealing strips are fixedly installed around the movable doors on the bases by sealing pressure plates. The sealing strips are connected to the main air supply pipe and the vacuum pump suction pipe by hoses to facilitate the rotation of the movable doors.

[0017] In the preferred embodiment, in step 3, the sealing strip operates using a pressurized air supply method. An air source is generated by an air compressor, and the pressurized air source is stored in an air tank. The constant pressure air in the air tank is connected to the air inlet of the sealing strip through the main air supply pipe. The sealing strip is pressurized by an electric ball valve in the control circuit. After the sealing strip is pressurized and expanded, it can contact the bottom sill of the upper isolation chamber's roller door, the side beam of the fixed isolation plate, the top plate of the isolation wall, and the door frame of the double-leaf movable door, and generate a certain amount of compression, so that the gaps are effectively sealed, making the upper and lower isolation chambers form a whole, and ensuring that cold air from the outside cannot enter the isolation chamber.

[0018] When the crane needs to move left or right, the sealing strip needs to be depressurized. The air pressure inside the sealing strip is released through the exhaust valve. After the depressurization is completed, the exhaust valve of the sealing strip is closed, and the vacuum pump is started to evacuate the sealing strip, so that the sealing strip is effectively separated from the sealing mating surface, thereby effectively separating the upper and lower isolation chambers. As a result, the crane can move freely and safely left and right.

[0019] In the preferred embodiment, in step 4, the heating and dehumidification in the isolation room is mainly controlled by the control system. Temperature and humidity sensors detect the temperature and humidity in the isolation room in real time and send the detection values ​​to the control system. The system can manually or automatically control the dehumidifier to start and stop based on the detection results, effectively dehumidifying the humid environment in the isolation room and ensuring that the air in the isolation room is dry. The selection of the heating and dehumidification unit in the isolation room is determined according to the size of the space in the isolation room.

[0020] In the preferred embodiment, in step 5, the control system mainly consists of a cabinet, PLC, touch screen, audible and visual alarm, electrical control system, pressure sensor, temperature sensor, and position sensor. Through programming, the system can accurately control the environment based on the ambient temperature inside the isolation room to ensure a dry indoor environment. At the same time, it can automatically engage and disengage the sealing strip and open and close the roller door and movable door according to the crane's operating requirements, realizing fully automated operation of the isolation zone and providing a good and safe parking environment for the crane equipment.

[0021] In the preferred embodiment, in step 5, the control system mainly controls the automatic operation of the three sets of equipment in the isolation room;

[0022] First, it controls the pressurization expansion and vacuum contraction functions of the pressurized telescopic sealing strip. This mainly involves controlling the automatic operation of the air compressor to provide a constant air pressure source for the air tank. By controlling the electric ball valves on the air supply circuit and vacuum circuit connected to the pressurized telescopic sealing strip, the telescopic control of the sealing strip is achieved, ensuring that the sealing strip at the gap between the upper and lower isolation chambers operates normally and that the isolation area is effectively isolated.

[0023] Secondly, the automatic operation of the dehumidification equipment in the isolation room automatically adjusts the indoor temperature and humidity in the isolation area through on-site temperature and humidity sensors to ensure a dry environment in the isolation area.

[0024] Third, control the automatic opening and closing of the roller doors on the left and right sides of the upper isolation chamber and the movable doors on the left and right sides of the lower isolation chamber as needed, so as to ensure that the doors can be automatically closed after the crane enters or exits the isolation chamber, effectively isolating the humid external environment.

[0025] The main beneficial effects of this invention are as follows:

[0026] To create a suitable working environment for the equipment to be safely stored in a humid environment for a long time, to ensure the safe operation of the metal structure and electrical components of the mechanical equipment, to reduce the daily maintenance workload of the staff, to reduce the safety hazards and quality risks of the equipment, and to ensure the safe operation of the equipment.

[0027] As the water flowing through the generating unit passes through the tailrace pipe to the tailrace control room, and after pressure regulation in the tailrace control room, it flows into the downstream river water through the tailrace tunnel. In order to ensure that the subsequent tailrace structures have the conditions for rotational maintenance, and also to save construction costs.

[0028] The tailrace tunnel is arranged in a 3-unit-1-tunnel pattern, with intermediate isolation walls installed between every 3 units, allowing the cranes to move freely throughout the tunnel.

[0029] The sealing strip operates using an air-pressure system. An air compressor generates an air source, which is then stored in an air tank. The constant-pressure air in the air tank is connected to the air inlet of the sealing strip through the main air supply pipe. The sealing strip is pressurized by an electric ball valve in the control circuit. After the sealing strip is pressurized and expanded, it comes into contact with the bottom sill of the upper isolation chamber's roller door, the side beam of the fixed isolation plate, the top plate of the isolation wall, and the door frame of the double-leaf movable door, generating a certain amount of compression. This effectively seals the gaps, making the upper and lower isolation chambers a whole and ensuring that cold air from the outside cannot enter the isolation chamber.

[0030] When the crane needs to move left or right, the sealing strip needs to be depressurized. The air pressure inside the sealing strip is released through the exhaust valve. After the depressurization is completed, the exhaust valve of the sealing strip is closed, and the vacuum pump is started to evacuate the sealing strip, so that the sealing strip is effectively separated from the sealing mating surface, thereby effectively separating the upper and lower isolation chambers. As a result, the crane can move freely and safely left and right. Attached Figure Description

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0032] Figure 1 This is a schematic diagram of the isolation room layout structure of the present invention.

[0033] Figure 2 This is a schematic diagram of the installation structure of the sealing strip around the movable door of the present invention.

[0034] Figure 3 This is a schematic diagram of the installation of the pressurized telescopic sealing strip of the present invention.

[0035] Figure 4 This is a control flowchart for the heating and dehumidifying machine of the present invention.

[0036] Figure 5 This is a flowchart illustrating the control process for the pressure relief and door opening of the sealing strip on the crane exiting the isolation compartment, as described in this invention.

[0037] Figure 6 This is a flowchart illustrating the pressurization control process for the sealing strip of the crane in the isolation room during parking, closing, and operation of the present invention.

[0038] Figure 7 This is a layout diagram of the dehumidification method for crane equipment operation and maintenance in a humid environment in the tailrace control room of a hydropower station, according to the present invention.

[0039] Figure 8 This is an enlarged view of the dehumidification method for crane equipment operation and maintenance in a humid environment in the tailrace chamber of a hydropower station, according to the present invention.

[0040] Figure 9 This is a cross-sectional view of the dehumidification method for crane equipment operation and maintenance in a humid environment in the tailrace chamber of a hydropower station, according to the present invention.

[0041] Figure 10 This is a schematic diagram illustrating the working principle of the pressurized telescopic sealing strip of the present invention. Detailed Implementation

[0042] like Figures 1-10 A method for dehumidifying crane equipment in a humid environment of a hydropower station's tailrace surge chamber includes the following steps:

[0043] Step 1, Equipment parking location design: Design a safe area for long-term parking of the lifting equipment in the equipment operating area environment, without interfering with other equipment;

[0044] Step 2, Isolation Room Setup: An isolation room is set up in the equipment parking area to provide large-area shielding and protection for the equipment, prevent the internal isolation area from communicating with the external humid environment, facilitate the control of the local humid environment in the isolation room, and ensure the safe operation of the equipment and facilities.

[0045] Step 3, gap sealing design: In view of the fact that the crane needs to move left and right in the entire tail adjustment chamber, a gap sealing isolation zone is adopted to block the outside air and ensure that the environment in the isolation zone is dry.

[0046] Step 4: Heating and dehumidifying the isolation room. Install heating and dehumidifying equipment in the isolation area to ensure a dry environment and safe operation of the equipment.

[0047] Step 5: Control. A PLC control system is used to control the air pressure of the gap seal in the isolation chamber and the start and stop of the dehumidifier to ensure that the environment in the isolation chamber is controlled and that the equipment is in a dry and safe environment.

[0048] In the preferred embodiment, in step 1, the water flowing through the generator unit flows to the tailrace chamber 0 through the tailrace pipe 02. After pressure regulation in the tailrace chamber 0, it flows into the downstream river water through the tailrace tunnel 03. The tailrace tunnel 03 is arranged in a 3-unit-1-tunnel pattern. An intermediate isolation wall 2 can be set between every 3 generator units. The top of the isolation wall 2 cannot be poured to the top, and a hydraulic grab beam passage is reserved for the left and right sides.

[0049] In the preferred embodiment, step 2 mainly consists of two parts: an upper track isolation room 31 and a lower track passage isolation room 32. The upper isolation room 31 provides a safe and effective parking area for the crane body and fixed equipment on the crane. The isolation method for this area is to directly construct a fixed isolation room on the concrete foundation supporting the crane track, and set up avoidance passages for the crane to travel on the left and right sides. The avoidance passages are closed by roller doors 31-2, directly enclosing the crane body and electrical equipment inside the isolation room, so that the main structural components and control components of the crane are always in a better operating environment, ensuring the safety of the core components of the crane 1 equipment. At the same time, passage doors 31-3 for personnel to pass through are set on both sides of the fixed isolation room 31-1.

[0050] In the preferred embodiment, in step 2, the lower passage isolation chamber 32 provides a safe and effective parking area for the hydraulic grab beam connected by the steel wire rope below the crane. The isolation method for this area is to directly install fixed isolation panels 32-1 on the left and right sides of the top of the middle partition wall, and reserve a passage for the hydraulic grab beam 12 to move left and right in the middle of the left and right sides. The passage is closed by a movable flat door 32-2. The hydraulic system automatically opens and closes the flat door as needed, so that the hydraulic grab beam 12 is effectively isolated in the area, ensuring the safe use of the main structural components of the hydraulic grab beam 12. The lower isolation chamber 32 should be integrated with the upper isolation chamber 31. With the cooperation of the upper and lower isolation chambers, a parking room suitable for long-term equipment parking is created in a humid environment.

[0051] In the preferred embodiment, in step 2, to facilitate observation of the crane's external environment, the upper isolation chamber 31 is constructed using transparent materials, with a condensate collection trough around the top, which discharges the condensate into the river water through a pre-installed drain pipe. The lower isolation chamber 32 has two symmetrically opening movable doors 32-2 located in the middle of its left and right sides, with an opening greater than the cross-sectional dimension of the hydraulic grab beam 12. This ensures that the hydraulic grab beam 12 does not interfere with the movement of the lower isolation chamber 32. The automatic opening of the movable doors 32-2 is mainly controlled by the hydraulic system 33. Simultaneously, retractable seals 35 are installed around the movable doors 32-2, effectively sealing the contact surfaces under the control of the system program, effectively isolating the humid external environment.

[0052] In the preferred embodiment, there are two main types of gaps in step 3;

[0053] One type is a gap that can be directly overlapped and contacted. The sealing method for this part is to directly install a sealing strip on the movable contact part for sealing. This includes the sealing of the roller door 31-2 of the isolation room 3 with the upper isolation room 31-1, and the sealing of the passage door 31-3 with the upper isolation room 31-1.

[0054] Another type is the gap where the interface between the upper and lower isolation chambers cannot be directly contacted. The sealing method for this part is designed to be a pressurized telescopic sealing strip 35-6-2. Pressurized telescopic sealing strip bases 35-6-1 are installed around the movable doors 32-2 on both sides of the lower isolation chamber 32. Then, the sealing strip 35-6-2 is fixedly installed around the movable doors 32-2 on the bases 35-6-1 through the sealing pressure plate 35-6-3. The sealing strip 35-6 is connected to the main air supply pipe 35-4 and the vacuum pump suction pipe 35-5 by a flexible hose 35-7 to facilitate the rotation of the movable doors 32-2.

[0055] In the preferred embodiment, in step 3, the sealing strip 35-6 operates using a pressurized air supply method. An air source is generated by an air compressor 35-1, and the pressurized air source is stored in an air tank 35-2. The constant pressure air in the air tank 35-2 is connected to the air inlet of the sealing strip 35-6 through the main air supply pipe 35-4. The sealing strip 35-6 is pressurized by an electric ball valve in the control circuit. After the sealing strip 35-6 is pressurized and expanded, it can contact the bottom sill of the rolling door 31-2 of the upper isolation chamber 31, the side beam of the fixed isolation plate 32-1, the top plate of the isolation wall 2, and the door frame of the double movable door 32-2, and generate a certain amount of compression, so that the gap is effectively sealed, and the upper and lower isolation chambers form a whole, ensuring that cold air from the outside cannot enter the isolation chamber.

[0056] When the crane needs to move left or right, the sealing strip 35-6 needs to be depressurized. The air pressure in the sealing strip 35-6 is released through the exhaust valve. After the depressurization is completed, the exhaust valve of the sealing strip 35-6 is closed, and the vacuum pump is started to evacuate the sealing strip 35-6, so that the sealing strip 35-6 is effectively separated from the sealing mating surface, thereby effectively separating the upper and lower isolation chambers. As a result, the crane can move freely and safely left and right.

[0057] In the preferred embodiment, in step 4, the heating and dehumidification in the isolation room 3 is mainly controlled by the control system 36. The temperature and humidity sensor detects the temperature and humidity in the isolation room 3 in real time and sends the detection values ​​to the control system 36. The system can manually or automatically control the start and stop of the dehumidifier 34 according to the detection results, effectively dehumidifying the humid environment in the isolation room 3 and ensuring that the indoor air in the isolation room 3 is dry. The selection of the heating and dehumidification unit 34 in the isolation room 3 is determined according to the size of the space in the isolation room.

[0058] In the preferred embodiment, in step 5, the control system 36 mainly consists of a cabinet, PLC, touch screen, audible and visual alarm, electrical control system, pressure sensor, temperature sensor, and position sensor. Through programming, the system can accurately control the ambient temperature in the isolation room to ensure a dry indoor environment. At the same time, it can automatically engage and disengage the sealing strip 35-6 and open and close the roller door 31-2 and the movable door 32-2 according to the crane's operating requirements, realizing fully automated operation of the isolation zone and providing a good and safe parking environment for the crane equipment.

[0059] In the preferred embodiment, in step 5, the control system 36 mainly controls the automatic operation of the three sets of equipment in the isolation room;

[0060] Firstly, it controls the pressurization expansion and vacuum contraction functions of the pressurized telescopic sealing strip 35-6. This mainly involves controlling the automatic operation of the air compressor 35-1 to provide a constant air pressure source for the air tank 35-2. By controlling the electric ball valves on the air supply circuit and vacuum circuit connected to the pressurized telescopic sealing strip 35-6, the extension and retraction of the sealing strip can be controlled to ensure that the sealing strip 35-6 at the gap between the upper and lower isolation chambers operates normally and that the isolation area is effectively isolated.

[0061] Secondly, the automatic operation of the dehumidification equipment in the isolation room automatically adjusts the indoor temperature and humidity in the isolation area through on-site temperature and humidity sensors to ensure a dry environment in the isolation area.

[0062] Third, control the automatic opening and closing of the roller doors 31-2 on the left and right sides of the upper isolation chamber 31 and the movable doors 32-2 on the left and right sides of the lower isolation chamber 32 as needed, so as to ensure that the doors can automatically close after the crane enters and exits the isolation chamber 3, effectively isolating the humid external environment.

[0063] The above-mentioned methods create a working environment in humid conditions that allows for long-term safe storage of the equipment, ensuring the safe operation of the metal structure and electrical components of the mechanical equipment, reducing the daily maintenance workload of staff, lowering equipment safety hazards and quality risks, and ensuring the safe operation of the equipment.

[0064] This invention has a simple and reliable structure, is safe to use, and is inexpensive;

[0065] This invention can be used in engineering fields for dehumidification of equipment in non-enclosed rooms in humid environments, and has a wide range of applications;

[0066] This invention is highly versatile and has broad application prospects.

[0067] The above embodiments are merely preferred technical solutions of the present invention and should not be considered as limitations on the present invention. The embodiments and features described in these embodiments can be arbitrarily combined without conflict. The scope of protection of the present invention should be limited to the technical solutions described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A method for dehumidifying crane equipment in a humid environment of a hydropower station's tailrace surge chamber, characterized in that... It includes the following steps: Step 1, Equipment parking location design: Design a safe area for long-term parking of the lifting equipment in the equipment operating area environment, without interfering with other equipment; Step 2, Isolation Room Setup: An isolation room is set up in the equipment parking area to provide large-area shielding and protection for the equipment, prevent the isolation room from communicating with the external humid environment, facilitate the control of the local humid environment in the isolation room, and ensure the safe operation of the equipment and facilities. Step 3, gap sealing design: In view of the fact that the crane needs to move left and right in the entire tail adjustment chamber, a gap sealing isolation chamber is used to block the outside air and ensure that the isolation chamber environment is dry. Step 4: Heating and dehumidifying the isolation room. A dehumidifier is installed in the isolation room to ensure a dry environment and to ensure the safe operation of the equipment. Step 5, Control: Use a PLC control system to control the air pressure of the gap seal in the isolation chamber and the start and stop of the dehumidifier to ensure that the environment inside the isolation chamber is controlled and that the equipment is in a dry and safe environment. In step 1, the water flowing through the generator unit flows to the tailrace chamber through the tailrace pipe. After pressure regulation in the tailrace chamber, it flows into the downstream river water through the tailrace tunnel. The tailrace tunnel is arranged in a 3-unit-1-tunnel pattern. An isolation wall is set between every 3 generator units. The top of the isolation wall cannot be poured to the top and a hydraulic grab beam passage is reserved for the left and right sides. In step 2, it mainly consists of two parts: the upper isolation room and the lower passage isolation room. The upper isolation room provides a safe and effective parking area for the crane body and the fixed equipment on the crane. The isolation method of this area is to directly build a fixed isolation room on the concrete foundation supporting the crane rail. The left and right sides are set up to allow the crane to move and pass through the passage. The passage is closed by roller doors, directly enclosing the crane body and electrical equipment in the isolation room. This ensures that the main structural components and control components of the crane are always in a better operating environment, ensuring the safety of the core components of the crane equipment. At the same time, the fixed isolation room is equipped with passage doors on both sides for personnel to work and pass through. In step 3, there are two main types of gaps; One type is a gap that can be directly overlapped and contacted. The sealing method for this gap is to directly install a sealing strip on the moving contact part for sealing, such as the sealing between the roller door of the isolation room and the upper isolation room part, and the sealing between the passage door and the upper isolation room part. Another type is the gap where the interface cannot be directly contacted. The sealing method for this gap is designed to be a pressurized telescopic sealing strip. Pressurized telescopic sealing strip bases are installed around the movable doors on both sides of the lower channel isolation room. Then, the sealing strip is fixedly installed around the movable doors on the bases by sealing pressure plates. The sealing strip is connected to the main air supply pipe and the vacuum pump suction pipe by a flexible hose to facilitate the rotation of the movable doors. In step 2, the lower passage isolation room provides a safe and effective parking area for the hydraulic grab beam connected by the steel wire rope below the crane. The isolation method for this area is to directly install fixed isolation panels on the left and right sides of the top of the isolation wall, and reserve a passage for the hydraulic grab beam to move left and right in the middle of the left and right sides. The passage is closed by a movable flat door. The hydraulic system automatically opens and closes the flat door as needed, so that the hydraulic grab beam is effectively isolated in the area, ensuring the safe use of the main structural components of the hydraulic grab beam. The lower passage isolation room should be integrated with the upper isolation room. With the cooperation of the lower passage isolation room and the upper isolation room, a parking room suitable for long-term equipment parking is created in a humid environment.

2. The method for dehumidifying crane equipment in a humid environment in the tailrace surge chamber of a hydropower station according to claim 1, characterized in that: in In step 2, to facilitate observation of the crane's external environment, the upper isolation chamber is constructed using transparent materials, with a condensate collection trough around the top, which discharges the condensate into the river through a pre-installed drain pipe. The lower passage isolation chamber has two symmetrically opening movable doors on the left and right sides, with an opening greater than the cross-sectional dimensions of the hydraulic grab beam. This ensures that the hydraulic grab beam does not interfere with the movement of the lower passage isolation chamber. The automatic opening of the movable doors is mainly controlled by a hydraulic system. Simultaneously, telescopic seals are installed around the movable doors, effectively sealing the contact surfaces under the control of the system program, effectively isolating them from the humid external environment.

3. The method for dehumidifying crane equipment in a humid environment in the tailrace surge chamber of a hydropower station according to claim 1, characterized in that: in In step 3, the sealing strip operates using an air-pressure system. An air compressor generates an air source, which is then stored in an air tank. The constant-pressure air in the air tank is connected to the air inlet of the sealing strip through the main air supply pipe. The sealing strip is pressurized by an electric ball valve in the control circuit. After the sealing strip is pressurized and expanded, it can contact the bottom sill of the upper isolation chamber's roller door, the side beam of the fixed isolation plate, the top plate of the isolation wall, and the door frame of the double-leaf movable door, generating a certain amount of compression. This effectively seals the gaps, making the upper and lower isolation chambers a whole, ensuring that cold air from the outside cannot enter the isolation chamber. When the crane needs to move left or right, the sealing strip needs to be depressurized. The air pressure inside the sealing strip is released through the exhaust valve. After the depressurization is completed, the exhaust valve of the sealing strip is closed, and the vacuum pump is started to evacuate the sealing strip, so that the sealing strip is effectively separated from the sealing mating surface, thereby effectively separating the upper and lower isolation chambers. As a result, the crane can move freely and safely left and right.

4. The method for dehumidifying crane equipment in a humid environment in the tailrace surge chamber of a hydropower station according to claim 1, characterized in that: in In step 4, the heating and dehumidification in the isolation room is mainly controlled by the control system. Temperature and humidity sensors detect the temperature and humidity in the isolation room in real time and send the detection values ​​to the control system. The system manually or automatically controls the dehumidifier to start and stop based on the detection results, effectively dehumidifying the humid environment in the isolation room and ensuring that the air in the isolation room is dry. The selection of the dehumidifier in the isolation room is determined by the size of the space in the isolation room.

5. The method for dehumidifying crane equipment in a humid environment in the tailrace surge chamber of a hydropower station according to claim 1, characterized in that: In step 5, the control system mainly consists of a cabinet, PLC, touch screen, audible and visual alarm, electrical control system, pressure sensor, temperature sensor, and position sensor. Through programming, the system can accurately control the environment according to the ambient temperature in the isolation room to ensure a dry indoor environment. At the same time, it can automatically engage and disengage the sealing strip and open and close the roller door and movable door according to the crane's operating needs, realizing the fully automated operation of the isolation room and providing a good and safe parking environment for the crane equipment.

6. The method for dehumidifying crane equipment in a humid environment in the tailrace surge chamber of a hydropower station according to claim 1, characterized in that: Firstly, it controls the pressurization expansion and vacuum contraction functions of the pressurized telescopic sealing strip. This mainly involves controlling the automatic operation of the air compressor to provide a constant air pressure source for the air tank. By controlling the electric ball valves on the air supply circuit and vacuum circuit connected to the pressurized telescopic sealing strip, the telescopic control of the sealing strip is achieved, ensuring that the sealing strip operates normally and the isolation chamber is effectively isolated. Secondly, the dehumidifier in the isolation room operates automatically, using on-site temperature and humidity sensors to automatically adjust the indoor temperature and humidity in the isolation room, ensuring a dry environment inside the isolation room; Third, control the automatic opening and closing of the roller doors on the left and right sides of the upper isolation room and the movable doors on the left and right sides of the lower passage isolation room as needed, so as to ensure that the doors can be automatically closed after the crane enters or exits the isolation room, effectively isolating the humid external environment.

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