Protective isolation method for crane equipment in humid environment of tailwater surge chamber of hydropower station

Abstract

A method for protecting and isolating crane equipment in a humid environment in a tailwater surge chamber of a hydropower station adopts a "three-machine-one-hole" tailwater tunnel planning arrangement in the tailwater surge chamber. The three tailwater pipes of every three units are connected to one tailwater tunnel. Partition walls are used to separate and isolate every two tailwater tunnels into independent units. An upper isolation room is constructed with the crane track foundation surface above the partition wall as a fulcrum to protect the crane body and electrical equipment. A lower isolation room is constructed with the upper end surface of the partition wall as a fulcrum to protect the hydraulic grab beam. During the power generation process, the crane equipment and the hydraulic grab beam are protected by the upper and lower isolation rooms. During the driving phase, the upper and lower isolation rooms are opened by operating a controller, allowing the crane equipment to drive out of the upper and lower isolation rooms and enter an operating position. This effectively protects the equipment from water vapor erosion, provides a dry parking environment, and ensures the safe operation of the equipment.

Description

Technical Field

[0001] The invention belongs to the technical field of protection of water-proximal equipment in a hydropower station, and relates to a method for protecting and isolating crane equipment in a humid environment of a tailwater surge chamber in a hydropower station. Background Art

[0002] In the daily production safety work of the tail control room of the hydropower station, the crane equipment is installed in the water-side area. A lot of water vapor is easily formed in this area, which makes the crane equipment parked in a humid environment for a long time. In a humid environment, it is easy for the metal structure of the equipment to rust, which is not conducive to the safe operation of the electrical equipment. It will cause certain safety hazards to the equipment itself, thereby affecting the normal operation of the equipment. Therefore, the safe operation of the equipment in a humid environment is particularly important.

[0003] At present, the safety protection of crane equipment in the tail regulating room of a hydropower station is generally achieved by installing an isolation room on the equipment body to block some water vapor in the environment. However, this method can only provide safety protection for local equipment and cannot effectively isolate and protect the entire set of equipment. For example, the main load-bearing beams facing the water at the bottom of the crane body and its hydraulic grab beams cannot be effectively protected. How to create a dry parking environment in a humid environment to ensure the safe operation of the metal structure and electrical components of the crane equipment is an urgent problem to be solved in maintenance. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a method for isolating crane equipment in a humid environment in a tailwater surge chamber of a hydropower station. The tailwater tunnel is planned in a "three-machine-one-tunnel" manner in the tailwater surge chamber. The three tailwater pipes of every three units are connected to one tailwater tunnel. Partition walls are used to separate and isolate every two tailwater tunnels into independent units. An upper isolation room is constructed with the crane track foundation surface at the upper part of the partition wall as a fulcrum to protect the crane body and electrical equipment. A lower isolation room is constructed with the upper end surface of the partition wall as a fulcrum to protect the hydraulic grab beam. During the power generation process, the unit protects the crane equipment and the hydraulic grab beam through the upper isolation room and the lower isolation room. During the driving stage, the upper isolation room and the lower isolation room are opened by operating the controller, so that the crane equipment drives out of the upper isolation room and the lower isolation room and enters the working station, which effectively protects the equipment from water vapor erosion, provides a dry parking environment, and ensures the safe operation of the equipment.

[0005] To solve the above technical problems, the technical solution adopted by the present invention is: a method for protecting and isolating crane equipment in a humid environment in a tailwater surge tank of a hydropower station, which comprises the following steps:

[0006] Step 1: Plan the tailrace tunnel. Based on the total number of units, adopt the "three units, one tunnel" approach; that is, three tailrace pipes for every three units are connected to one tailrace tunnel.

[0007] Step 2: Isolate: Use partition walls to separate each two tailrace tunnels into independent units;

[0008] Step 3: Build the upper isolation room, using the crane track foundation surface on the upper part of the partition wall as the fulcrum to isolate the crane body and electrical equipment;

[0009] Step 4: Build the lower isolation room with the upper end surface of the partition wall as the fulcrum to isolate the hydraulic grab beam.

[0010] In step 2, the elevation of the partition wall is lower than the lower side of the lifting equipment track foundation, and after the hydraulic grab beam is lifted to the highest position, the upper end surface of the partition wall is lower than the lower end surface of the hydraulic grab beam.

[0011] In step 3, the upper isolation room is a closed structure with an arc-shaped ceiling, the lifting equipment track passes through the rolling doors at both ends of the upper isolation room, and the ear doors are located on both sides of the rolling doors.

[0012] In step 3, the rolling door is an electric rolling door, and the electric rolling door is electrically connected to the controller of the lifting equipment.

[0013] In step 4, the lower isolation room is located at the lower part of the upper isolation room and corresponds to it; the upper isolation room is connected to the upper end face of the partition wall and the lower side face of the track foundation by two double doors, and the hydraulic grab beam channel passes through the double doors.

[0014] In step 4, the double doors are opened and closed by a hydraulic cylinder of a hydraulic system, and the hydraulic system is electrically connected to a controller of the lifting equipment.

[0015] The above-mentioned method for operating the protective isolation of the crane equipment in the humid environment of the tailwater surge tank of the hydropower station comprises the following steps:

[0016] During the power generation process,

[0017] S1, parking, the crane equipment is located in the upper isolation room, the roller door is closed; the hydraulic grab beam is located in the lower isolation room, the double door is closed;

[0018] S2, overflow: The overflow water from the generator unit flows through the unit's tailwater pipe into the tailwater chamber, where it is pressure-regulated and then flows into the downstream river through the tailwater tunnel. During this step, the surge in the tailwater tunnel surges upward toward the hydraulic grab beam and the crane body, creating a humid environment above the tailwater tunnel.

[0019] S3: Protection: The upper isolation room protects the crane body and electrical equipment, and the lower isolation room protects the hydraulic grab beam to prevent moisture from entering the upper and lower isolation rooms. During this step, the highest surge will not overflow the foundation surface of the crane track.

[0020] Driving stage,

[0021] S4, driving, the operating controller starts the rolling door and hydraulic system, driving the rolling door and the double door to open respectively, and the crane equipment starts and drives out of the upper isolation room and the lower isolation room along the track to enter the working station.

[0022] The main beneficial effects of the present invention are:

[0023] The tailwater tunnel is planned in a "three-unit-one-tunnel" arrangement, with three tailwater pipes of every three units connected to one tailwater tunnel. This ensures that subsequent tailwater structures have the conditions for rotation and maintenance, and also saves construction costs.

[0024] Partition walls are used to separate each two tailwater tunnels into independent units. The upper ends of the partition walls are not cast to the top, allowing the crane to move freely in the entire tunnel.

[0025] An upper isolation room is constructed with the crane track foundation surface on the upper part of the partition wall as the fulcrum to protect the crane body and electrical equipment.

[0026] A hydraulic grab beam is constructed to protect the lower isolation room using the upper end surface of the partition wall as a fulcrum.

[0027] Rolling doors are set at both ends of the upper isolation room, and double doors are set at both ends of the lower isolation room. During the driving stage, the rolling doors and double doors are opened to allow the lifting equipment to move out of the upper isolation room and at the same time drive the hydraulic grab beam to move out of the lower isolation room.

[0028] During the power generation process, the upper isolation room and the lower isolation room serve as parking spaces for lifting equipment and hydraulic main beams. After the river water flowing through the unit during power generation flows through the unit's tailwater pipe to the tailwater room, the upward waves and water vapor will not cause erosion to the hydraulic grab beam and crane equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention will be further described below with reference to the accompanying drawings and examples:

[0030] Figure 1 It is a schematic diagram of the layout of the present invention.

[0031] Figure 2 It is a schematic cross-sectional view of the present invention.

[0032] Figure 3 This is a state diagram of the upper isolation room and the lower isolation room of the present invention when they are closed.

[0033] Figure 4 This is a state diagram of the upper isolation room and the lower isolation room of the present invention when they are opened.

[0034] Figure 5 for Figure 1 A magnified schematic diagram of .

[0035] Figure 6 This is a schematic diagram of the connection between the double-leaf door and the hydraulic system of the present invention.

[0036] In the figure: upper isolation room 1, rolling door 11, ear door 12, lower isolation room 2, double door 21, hydraulic system 22. DETAILED DESCRIPTION

[0037] like Figures 1 to 6 A method for protecting and isolating crane equipment in a humid environment in a tailwater surge tank of a hydropower station comprises the following steps:

[0038] Step 1: Plan the tailrace tunnel. Based on the total number of units, adopt the "three units, one tunnel" approach; that is, three tailrace pipes for every three units are connected to one tailrace tunnel.

[0039] Step 2: Isolate: Use partition walls to separate each two tailrace tunnels into independent units;

[0040] Step 3: Build the upper isolation room. Use the crane track foundation surface on the upper part of the partition wall as the fulcrum to build the upper isolation room 1 to isolate the crane body and electrical equipment.

[0041] Step 4: construct the lower isolation room, use the upper end surface of the partition wall as the fulcrum to construct the lower isolation room 2, and isolate the hydraulic grab beam.

[0042] The above method uses the crane track foundation surface on the upper part of the partition wall as a fulcrum to construct an upper isolation room 1 to protect the crane body and electrical equipment, and uses the upper end surface of the partition wall as a fulcrum to construct a lower isolation room 2 to protect the hydraulic grab beam.

[0043] In a preferred solution, in step 2, the partition wall is positioned lower than the underside of the crane track foundation, and after the hydraulic grab beam is raised to its highest position, the upper end of the partition wall is lower than the lower end of the hydraulic grab beam. This is to prevent the upper end of the partition wall from being cast to the top, allowing the crane to move freely throughout the cavern.

[0044] In a preferred embodiment, in step 3, the upper isolation room 1 is a closed structure with an arc-shaped ceiling, and the crane track passes through the roller doors 11 at both ends of the upper isolation room 1, with ear doors 12 located on both sides of the roller doors 11. This allows the crane to be driven out of the upper isolation room 1 along the track when the roller doors 11 are opened or closed, or to be isolated after entering the upper isolation room 1.

[0045] In a preferred embodiment, in step 3, the rolling door 11 is an electric rolling door, which is electrically connected to a controller of the lifting device so as to control the opening and closing of the rolling door 11 by the controller.

[0046] In a preferred embodiment, in step 4, the lower compartment 2 is located below and corresponding to the upper compartment 1; the upper compartment 1 is connected to the upper end surface of the partition wall and the lower side of the track foundation using two bi-directional doors 21, and the hydraulic grab beam passage passes through the bi-directional doors 21. This allows the lifting equipment to simultaneously drive the hydraulic grab beam out of or into the lower compartment 2 when it moves out of or into the upper compartment 1.

[0047] In a preferred embodiment, in step 4, the bi-directional door 21 is opened and closed by a hydraulic cylinder of a hydraulic system 22, and the hydraulic system 22 is electrically connected to a controller of a lifting device. The purpose is to control the opening and closing of the bi-directional door 21 through the controller.

[0048] In a preferred embodiment, the method for operating the protective isolation of the crane equipment in the humid environment of the tailwater surge tank of a hydropower station as described above comprises the following steps:

[0049] During the power generation process,

[0050] S1, parking, the crane equipment is located in the upper isolation room 1, the rolling door 11 is in the closed state; the hydraulic grab beam is located in the lower isolation room 2, and the double door 21 is in the closed state;

[0051] S2, overflow: The overflow water from the generator unit flows through the unit's tailwater pipe into the tailwater chamber, where it is pressure-regulated and then flows into the downstream river through the tailwater tunnel. During this step, the surge in the tailwater tunnel surges upward toward the hydraulic grab beam and the crane body, creating a humid environment above the tailwater tunnel.

[0052] S3: Protection: The crane body and electrical equipment are protected in the upper isolation room 1, and the hydraulic grab beam is protected in the lower isolation room 2 to prevent moisture from entering the upper isolation room 1 and the lower isolation room 2. During this step, the highest surge will not overflow the foundation surface of the crane track.

[0053] Driving stage,

[0054] S4, driving, the operating controller starts the rolling door 11 and the hydraulic system 22, driving the rolling door 11 and the double door 21 to open respectively, and the crane equipment starts and drives out of the upper isolation room 1 and the lower isolation room 2 along the track to enter the working station.

[0055] In the above method, during the power generation process, the upper isolation room 1 and the lower isolation room 2 serve as parking spaces for lifting equipment and hydraulic main beams. After the river water flowing through the unit during power generation flows through the unit tailwater pipe to the tailwater room, the upward surge and water vapor will not cause erosion to the hydraulic grab beam and crane equipment.

[0056] The above embodiments are merely preferred technical solutions of the present invention and should not be construed as limiting the present invention. The embodiments and features in the embodiments of this application may be arbitrarily combined with each other unless they conflict. The scope of protection of the present invention shall be the technical solutions described in the claims, including equivalent alternatives to the technical features of the technical solutions described in the claims. Equivalent alternatives and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A method for protecting and isolating crane equipment in a humid environment in a tailwater surge tank of a hydropower station, characterized in that: It includes the following steps: Step 1: Plan the tailrace tunnel. Based on the total number of units, adopt the "three units, one tunnel" approach; that is, three tailrace pipes for every three units are connected to one tailrace tunnel. Step 2: Isolate: Use partition walls to separate each two tailrace tunnels into independent units; Step 3: construct an upper isolation room, using the upper crane track foundation surface of the partition wall as a fulcrum to construct an upper isolation room (1) to isolate the crane body and electrical equipment; Step 4: construct the lower isolation room, using the upper end surface of the partition wall as a fulcrum to construct the lower isolation room (2) and isolate the hydraulic grab beam.

2. The method for protecting and isolating crane equipment in a humid environment in a tailwater surge tank of a hydropower station according to claim 1 is characterized by: In step 2, the elevation of the partition wall is lower than the lower side of the lifting equipment track foundation, and after the hydraulic grab beam is lifted to the highest position, the upper end surface of the partition wall is lower than the lower end surface of the hydraulic grab beam.

3. The method for protecting and isolating crane equipment in a humid environment in a tailwater surge tank of a hydropower station according to claim 1 is characterized by: In step 3, the upper isolation room (1) is a circular arc-shaped ceiling closed structure, the lifting equipment track passes through the rolling doors (11) at both ends of the upper isolation room (1), and the ear doors (12) are located on both sides of the rolling doors (11).

4. The method for protecting and isolating crane equipment in a humid environment in a tailwater surge tank of a hydropower station according to claim 3 is characterized by: In step 3, the rolling door (11) is an electric rolling door, and the electric rolling door is electrically connected to the controller of the lifting equipment.

5. The method for protecting and isolating crane equipment in a humid environment in a tailwater surge tank of a hydropower station according to claim 1 is characterized by: In step 4, the lower isolation room (2) is located at the lower part of the upper isolation room (1) and corresponds thereto; the lower isolation room (2) is connected to the upper end surface of the partition wall and the lower side surface of the track foundation by two split doors (21), and the hydraulic grab beam channel passes through the split doors (21).

6. The method for protecting and isolating crane equipment in a humid environment in a tailwater surge tank of a hydropower station according to claim 5, characterized in that: In step 4, the double door (21) is driven to open and close by a hydraulic cylinder of a hydraulic system (22), and the hydraulic system (22) is electrically connected to a controller of the lifting equipment.

7. The method for operating the method for protecting and isolating crane equipment in a humid environment in the tailwater surge tank of a hydropower station according to any one of claims 1 to 6, characterized in that: It includes the following steps: During the power generation process, S1, parking, the crane equipment is located in the upper isolation room (1), and the rolling door (11) is in a closed state; the hydraulic grab beam is located in the lower isolation room (2), and the double door (21) is in a closed state; S2, overflow: The overflow water from the generator unit flows through the unit's tailwater pipe into the tailwater chamber, where it is pressure-regulated and then flows into the downstream river through the tailwater tunnel. During this step, the surge in the tailwater tunnel surges upward toward the hydraulic grab beam and the crane body, creating a humid environment above the tailwater tunnel. S3, protection, the upper isolation room (1) protects the crane body and electrical equipment, and the lower isolation room (2) protects the hydraulic grab beam to prevent water vapor from entering the upper isolation room (1) and the lower isolation room (2); in this step, the highest surge will not overflow the foundation surface of the crane track; Driving stage, S4, driving, the operating controller starts the rolling door (11) and the hydraulic system (22), respectively driving the rolling door (11) and the double door (21) to open, and the crane equipment starts to move out of the upper isolation room (1) and the lower isolation room (2) along the track to enter the working station.

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