CN-119221433-B - Floating type access door for draining and overhauling sluice chamber of hydropower station and use method

CN119221433BCN 119221433 BCN119221433 BCN 119221433BCN-119221433-B

Abstract

The invention discloses a floating access door for draining and overhauling a sluice gate chamber of a hydropower station, which comprises a floating gate body, a sealing structure arranged at the bottom end of the floating gate body, a pump cabin arranged at the bottom of the floating gate body and a ballast cabin arranged around the pump cabin, wherein the ballast cabin is arranged in mirror symmetry along the middle part of the floating gate body, the pump cabin is connected with the ballast cabin, and side sealing structures are arranged on two sides of the floating gate body. The floating door has the advantages of improving the posture stability, the operation automation degree, the sealing effect, the drainage efficiency, the safety, the maintenance efficiency and the operation convenience of the floating door.

Inventors

ZHU SISI
YE QIANG
XU JIAMING
MAO YUANPING
YE DEZHEN
LIANG QIANG
JIA HONGGANG
GENG ZAIMING
WAN GANG
ZHANG YI
ZHU QUANPING
YANG LINZHEN

Assignees

中国长江电力股份有限公司

Dates

Publication Date: 20260508
Application Date: 20241122

Claims (9)

1. The use method of the floating access door for draining and overhauling a sluice gate chamber of a hydropower station is characterized in that the floating access door is applied and comprises a floating door body (1), a sealing structure arranged at the bottom end of the floating door body (1), a pump cabin (4) arranged at the bottom of the floating door body (1) and a ballast cabin arranged around the pump cabin (4), wherein the ballast cabin is arranged in a mirror symmetry mode along the middle part of the floating door body (1), the pump cabin (4) is connected with the ballast cabin, and side sealing structures are arranged on two sides of the floating door body (1); The using method comprises the following steps: s1, hauling a floating door, namely hauling the floating door body (1) to a lock chamber maintenance area by adopting a pushing tug boat; s2, shifting the floating gate, and moving the floating gate body (1) to be aligned to the front of the gate hole of the sluice chamber; S3, sinking the floating gate, controlling the water inlet of the ballast tank in the floating gate body (1), sinking the floating gate body (1), tightly attaching the floating gate body with the gate hole bottom plate and the gate pier, stabilizing the bottom, and forming sealing with the gate hole by virtue of sealing structures at two sides and the bottom of the floating gate body (1); S4, draining water in a first period of the lock chamber, opening valves on the upper and lower sides of the floating gate body (1), starting two main pumps in the pump cabin to perform lock chamber water pumping and draining operation, closing the main pump of the floating gate when the water depth in the lock chamber is smaller than 110cm, arranging a submersible pump in the lock chamber at the position, close to the floating gate, of the upper side of the floating gate, and starting the submersible pump to continue draining water; S5, plugging the drainage area, and in the drainage process, plugging each water stopping part of the floating gate body (1) and the leakage part of the access door at the upstream of the gate chamber, so as to reduce the infiltration of inflow water at the upstream and downstream of the gate chamber; S6, draining water in the second stage of the lock chamber, closing the submersible pump when the water depth in the lock chamber is lower than 20cm by using the main pump and the submersible pump in the first stage, enabling an maintainer to enter the lock chamber, setting up two areas which are arranged at the upstream of the floating gate and close to the floating gate and at the downstream of the access gate and are parallel to the floating gate and the access gate respectively, forming two closed water storage areas, arranging the submersible pump in the water storage area close to the access gate simultaneously, pumping water in the water storage area close to the access gate to the water storage area close to the floating gate, and arranging the miniature submersible pump at the periphery of the two water storage areas respectively to pump residual water in the lock chamber with the water depth lower than 20cm into the water storage areas, thereby forming dry land overhaul operation conditions in the lock chamber except the two water storage areas; s7, filling water and flattening, wherein after the maintenance of the sluice chamber is completed, the sluice chamber is subjected to horizontal flattening, a communication pipeline in the floating gate body (1) is opened, and river water at the downstream of the floating gate body (1) enters the sluice chamber; S8, floating the floating gate, after the water levels of the upstream and downstream of the floating gate body (1) are consistent, closing all valves on the floating gate body (1), controlling the floating gate body to discharge water in the ballast tank, floating the floating gate body (1), and finally moving out the floating gate body (1) by using a pushing ship.
2. The method of claim 1, wherein the floating gate body comprises a base and an operating platform positioned in the middle of the top of the base, the ballast tank is positioned in the base, the base is in an octagonal structure, the operating platform is in a rectangular structure, and the outer side of the operating platform is connected with the base through a ladder stand.
3. The method for using the floating access door for draining and overhauling the sluice chamber of the hydropower station as claimed in claim 2, wherein a communication pipeline is arranged in the base, the communication pipeline is connected with the front side wall and the rear side wall of the base, and the pump cabin (4) is positioned on the communication pipeline.
4. The method for using the floating access door for draining and overhauling the sluice chamber of the hydropower station according to claim 3, wherein two main pumps are arranged in the pump cabin (4), the two main pumps are arranged on a water draining pipeline in parallel, the output end of the water draining pipeline is connected with the bottom of the floating door body (1), the output end of the water draining pipeline is connected with the ballast tank, and a water inlet pipeline is further arranged in the pump cabin (4) and connected with the ballast tank.
5. The method of using a floating access door for hydraulic power station sluice gate valve drainage service as claimed in claim 1, wherein the ballast tanks include a first ballast tank (5), a second ballast tank (6) and a third ballast tank (7), the first ballast tank (5) is distributed on the front and rear sides of the pump tank (4), the second ballast tank (6) is distributed on four corners of the pump tank (4), and the third ballast tank (7) is distributed on the left and right sides of the pump tank (4).
6. The method for using a floating access door for draining and repairing a sluice chamber of a hydroelectric power station according to claim 1, characterized in that the sealing structure comprises a first sealing structure (2) arranged at the front side edge of the floating door body (1) and a second sealing structure (3) arranged in the middle of the floating door body (1).
7. The method for using the floating access door for draining and overhauling the sluice chamber of the hydropower station according to claim 1, wherein in the step S1, the accumulated water in the pressure loading cabin in the floating door body (1) is drained, and then the floating door body (1) is moved.
8. The method of using a floating access door for draining and repairing a sluice gate chamber of a hydropower station according to claim 1, wherein in the step S3, two ballast tanks at the left and right ends of the floating gate body (1) are controlled to be filled with water, four ballast tanks at four corners of the floating gate body (1) are controlled to be filled with water after the two ballast tanks are filled with water, and finally two ballast tanks at the front and rear sides of the floating gate body (1) are controlled to be filled with water.
9. The method for using the floating access door for draining and overhauling the sluice chamber of the hydropower station as claimed in claim 1, wherein in the step S7, after the horizontal pressure filling inside and outside the sluice chamber is completed, the pipeline outside the sluice chamber and the ballast tanks arranged in opposite groups are sequentially communicated, the flat pressure of the ballast tanks is carried out, and after the flat pressure is completed, the sluice chamber is sequentially drained by reversing the water inlet sequence of the sluice chamber.

Description

Floating type access door for draining and overhauling sluice chamber of hydropower station and use method Technical Field The invention relates to the technical field of floating access doors, in particular to a floating access door for draining and overhauling a sluice chamber of a sluice gate of a hydropower station and a use method thereof. Background In the periodic maintenance of a hydroelectric power station sluice gate chamber, a floating access door (simply referred to as a floating door) is a common device. The main function of the floating gate is to isolate the gate chamber from the outside during maintenance, and the floating gate is aligned to the gate hole and is tightly attached to the gate hole to form a seal, so that water in the gate chamber is drained, and the maintenance operation of the gate chamber is conveniently carried out. However, the existing floating door has some problems in the use process, particularly in the sinking or floating process of the floating door, the posture is easy to deviate or incline, and the construction efficiency and the safety are affected. The method specifically comprises the following steps: 1, in the sinking or floating process of the floating door, the gravity center of the floating door needs to be ensured to be positioned at the center of the floating door structure, namely the whole floating door keeps a horizontal state, so as to avoid the posture of the floating door from tilting or shifting. Although the inner cabins of the floating door are symmetrically arranged, the consistency of the corresponding cabins in the water inlet and drainage process still cannot be ensured, and the posture of the floating door is unstable. 2. Usually, cabin water level monitoring and real-time contact person control valves are needed to be carried out manually, so that labor intensity of workers is high, and potential safety hazards exist. 3. The sealing effect between floating gate and the floodgate hole is great by the influence of floating gate gesture, if floating gate gesture is unstable, and sealing effect can become poor, leads to the water leakage, influences the maintenance operation. 4. The drainage process of the lock chamber is divided into a first stage and a second stage, wherein the first stage uses a main pump to carry out primary drainage, and the second stage uses a submersible pump to carry out fine drainage. Because the floating gate posture is unstable, the drainage efficiency is possibly reduced, and the maintenance time is prolonged. Disclosure of Invention The invention aims to solve the technical problems that offset or inclination is easy to occur in the descending process of a floating door, and potential safety hazards exist. In order to solve the technical problems, the floating access door for draining and overhauling the sluice chamber of the hydropower station comprises a floating door body, a sealing structure arranged at the bottom end of the floating door body, a pump cabin arranged at the bottom of the floating door body and a ballast cabin arranged around the pump cabin, wherein the ballast cabin is arranged in mirror symmetry along the middle part of the floating door body, the pump cabin is connected with the ballast cabin, and both sides of the floating door body are provided with side sealing structures. Preferably, the floating gate body comprises a base and an operating platform positioned in the middle of the top of the base, the ballast tank is positioned in the base, the base is in an octagonal structure, the operating platform is in a rectangular structure, and the outer side of the operating platform is connected with the base through a ladder stand. Preferably, a communication pipeline is arranged in the base, the communication pipeline is connected with the front side wall and the rear side wall of the base, and the pump cabin is positioned on the communication pipeline. Preferably, two main pumps are arranged in the pump cabin and are arranged on a water drainage pipeline in parallel, the output end of the water drainage pipeline is connected with the bottom of the floating gate body, the output end of the water drainage pipeline is connected with the ballast tank, a water inlet pipeline is further arranged in the pump cabin, and the water inlet pipeline is connected with the ballast tank. Preferably, the ballast tanks include a first ballast tank, a second ballast tank and a third ballast tank, the first ballast tank is distributed on front and rear sides of the pump tank, the second ballast tank is distributed on four corners of the pump tank, and the third ballast tank is distributed on left and right sides of the pump tank. Preferably, the sealing structure comprises a first sealing structure arranged at the front side edge of the floating door body and a second sealing structure arranged in the middle of the floating door body. The application method of the floating access door for draining and overhauling t