Hoist distributed control device for hydropower station and application method of hoist distributed control device

Abstract

The invention discloses a hoist distributed control device for a hydropower station and an application method thereof, the hoist distributed control device comprises a plurality of distributed control terminals in one-to-one correspondence with hoists of the hydropower station, a main oil pipe of each hoist in N hoists of the hydropower station is communicated with main oil pipes of other hoists through N-1 bypass communicating pipes, a main control valve is installed on the main oil pipe, a bypass control valve is installed on each bypass communicating pipe, the distributed control terminal comprises a controller, a gear knob and a communication module, the control ends of the main control valve and the bypass control valves are connected with the output end of the controller, the gear knob is connected with the controller, and the communication module is connected with the controller. And the controller is connected with the communication module so as to be in communication connection with other distributed control terminals. According to the invention, the hoists can be mutually backed up, and the gate corresponding to the faulted hoist hydraulic control unit is controlled by using the normal hoist hydraulic control unit so as to realize the emergency opening and closing of the gate.

Description

Technical Field

[0001] The present invention relates to the field of hydropower station control, and in particular to a distributed control device for a hoist of a hydropower station and an application method thereof. Background Art

[0002] A gate hoist is a mechanical device used to open and close the gates of a hydropower station. It uses a mechanical transmission mechanism to raise (open) or lower (close) the gates according to a set stroke and speed. For example, gates at a hydropower station's water intake and spillway require gate hoists. When power generation is required, the gate hoist opens the inlet gates, allowing water to flow into the turbines for power generation. When flood discharge or maintenance is required, the gate hoist closes the gates to control water flow. Currently, the water intake and spillway gates of hydropower stations are controlled by hydraulic gate hoists. Each gate hoist is associated with a gate. If a gate hoist malfunctions, the gates cannot be opened or closed properly. This can at best affect the normal operation of the hydropower station's generators, and at worst, cause flooding and dam collapse, seriously endangering the power plant and the property and lives of residents upstream and downstream. This major hidden danger must be promptly addressed. Summary of the Invention

[0003] The technical problem to be solved by the present invention is: in response to the problems existing in the prior art, the present invention provides a distributed control device for a gate hoist of a hydropower station. The present invention aims to eliminate hidden dangers by controlling the gate corresponding to the faulty gate hoist when a hydraulic gate hoist fails, based on the compatible use of the existing hydraulic gate hoist.

[0004] In order to solve the above technical problems, the technical solution proposed by the present invention is: A distributed control device for a gate hoist of a hydropower station, comprising a plurality of distributed control terminals corresponding one-to-one to the gate hoists of the hydropower station, wherein the hydropower station comprises N gate hoists, and the main oil pipe of each gate hoist is connected to the main oil pipes of other gate hoists via N-1 bypass connecting pipes, the main oil pipe being installed with a main control valve, and each bypass connecting pipe being installed with a bypass control valve, the distributed control terminal comprising a controller, a gear knob and a communication module, the control ends of the main control valve and the bypass control valve being respectively connected to the output end of the controller, the gear knob being connected to the controller for controlling the selective opening of the main control valve and the bypass control valve, and the controller being connected to the communication module for communication connection with other distributed control terminals.

[0005] Optionally, the gear knob has N gears, and each gear is used to selectively open one of the main control valve and the bypass control valve and close the other control valves.

[0006] Optionally, the controller is connected to the status monitoring transmitter of the gate hoist through a communication module. The status monitoring transmitter includes an opening sensor, a pressure sensor and a transmitter for monitoring the real-time opening and closing opening and pressure signals of the gate hoist. The controller is connected to a display screen for displaying the real-time opening and closing opening and pressure signals of this gate hoist and other gate hoists.

[0007] Optionally, the bypass connecting pipe is a high-pressure hose, and both ends of the high-pressure hose are connected to the main oil pipe of the hoist and the main oil pipes of other hoists respectively through three-way joints.

[0008] Optionally, the main oil pipe is the left oil supply pipe, the right oil supply pipe, the control oil pipe or the return oil pipe of the gate hoist.

[0009] The present invention also provides an application method of a distributed control device for a hoist of a hydropower station, comprising the following steps: S101, each distributed control terminal monitors the gear position operation of the gear knob and the gear position operation broadcast from other distributed control terminals through the controller. If any distributed control terminal monitors the gear position operation of the gear knob, it jumps to step S102; if any distributed control terminal monitors the gear position operation broadcast from other distributed control terminals, it jumps to step S103; S102 indicates that the operator is operating the current distributed control terminal and controlling the opening of the main control valve and bypass control valve corresponding to the hoist according to the gear position operation of the gear knob. The current distributed control terminal becomes the master node, and the master node sends the gear operation broadcast to other distributed control terminals, and jumps to step S101; S103 indicates that the operator is operating other distributed control terminals. The current distributed control terminal becomes a slave node. The slave node controls the opening of the main control valve and bypass control valve corresponding to the gate hoist according to the gear operation information carried in the gear operation broadcast.

[0010] Optionally, when sending a gear operation broadcast to other distributed control terminals in step S102, the sent gear operation broadcast carries the current timestamp; in step S101, after any distributed control terminal monitors the gear operation broadcast from other distributed control terminals and before jumping to step S103, it also includes parsing the gear operation broadcast to extract the timestamp carried therein. If the carried timestamp and the current timestamp exceed a preset threshold, the gear operation broadcast is determined to be an invalid gear operation broadcast, and the process ends and jumps to step S101; otherwise, the gear operation broadcast is determined to be a valid gear operation broadcast, and the process jumps to step S103.

[0011] Optionally, when sending a gear operation broadcast to other distributed control terminals in step S102, the gear operation broadcast sent is encrypted data with the signature of the distributed control terminal, and the encrypted data is generated by encrypting the unique number UUID of the master node; in step S101, after any distributed control terminal monitors the gear operation broadcast from other distributed control terminals and before jumping to step S103, it also includes signature verification of the gear operation broadcast and decryption using the unique number UUID of the master node. If the signature verification fails or the decryption fails, the gear operation broadcast is determined to be an invalid gear operation broadcast, and the process ends and jumps to step S101; otherwise, the gear operation broadcast is determined to be a valid gear operation broadcast, and the process jumps to step S103.

[0012] Compared with the prior art, the advantages of the present invention are as follows: the present invention includes a plurality of distributed control terminals corresponding to the hoists of the hydropower station, the hydropower station includes N hoists, and the main oil pipe of each hoist is connected to the main oil pipes of other hoists through N-1 bypass connecting pipes, the main oil pipe is installed with a main control valve, and each bypass connecting pipe is installed with a bypass control valve, the distributed control terminal includes a controller, a gear knob and a communication module, the control ends of the main control valve and the bypass control valve are respectively connected to the output end of the controller, and the gear knob is connected to the controller for controlling the main control valve. The control valve and the bypass control valve are selectively opened, and the controller and the communication module are connected for communication with other distributed control terminals. The above structure enables multiple gate hoists and their distributed control terminals to be interconnected. When a gate hoist fails, the distributed control terminal of another normal gate hoist can be used to control the gate corresponding to the faulty gate hoist by operating the gear knob, eliminating the risk that the faulty gate hoist cannot control the corresponding gate, improving the reliability of the gate equipment opening and closing, and it is more convenient and quick for the operator to use, and can operate other gate hoists at any gate hoist. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 Schematic diagram of the device structure of an embodiment of the present invention.

[0014] Figure 2 Schematic diagram of the pipeline connection of the gate hoist in an embodiment of the present invention, wherein a to d are the left oil supply pipe, right oil supply pipe, control oil pipe and return oil pipe of the gate hoist, respectively.

[0015] Figure 3 Schematic diagram of the application method in an embodiment of the present invention.

[0016] Legend: 1. Main oil pipe; 11. Main control valve; 2. Bypass connecting pipe; 21. Bypass control valve; 3. Controller; 4. Shift knob; 5. Communication module. DETAILED DESCRIPTION

[0017] The present invention will be further described below in conjunction with the accompanying drawings and specific preferred embodiments, but the scope of protection of the present invention is not limited thereby.

[0018] like Figure 1 As shown, the distributed control device for the gate hoist of a hydropower station in this embodiment includes multiple distributed control terminals corresponding to the gate hoists of the hydropower station. The hydropower station includes N gate hoists, and the main oil pipe 1 of each gate hoist is connected to the main oil pipe 1 of other gate hoists through N-1 bypass connecting pipes 2. The main oil pipe 1 is installed with a main control valve 11, and each bypass connecting pipe 2 is installed with a bypass control valve 21. The distributed control terminal includes a controller 3, a gear knob 4 and a communication module 5. The control ends of the main control valve 11 and the bypass control valve 21 are respectively connected to the output end of the controller 3. The gear knob 4 is connected to the controller 3 for controlling the selective opening of the main control valve 11 and the bypass control valve 21. The controller 3 is connected to the communication module 5 for communication with other distributed control terminals. Among them, the gear knob 4 is a potentiometer, and different gears correspond to different resistance values, so that the controller 3 can realize the detection of gear operation.

[0019] In this embodiment, the gear knob 4 has N gears, each gear is used to selectively open one of the main control valve 11 and the bypass control valve 21 and close the other control valves, such as Figure 1 In this embodiment, the hydropower station includes three hoists, and the gear knob 4 has three gears: gear ①, gear ②, and gear ③. Gear ① is used to selectively open the main control valve 11 (opening the main control valve 11 while closing all bypass control valves 21), gear ② is used to selectively open the first bypass control valve 21 (opening the bypass control valve 21 while closing the main control valve 11 and the second bypass control valve 21), and gear ③ is used to selectively open the second bypass control valve 21 (opening the bypass control valve 21 while closing the main control valve 11 and the first bypass control valve 21). The number of other gears is similar.

[0020] In this embodiment, the controller 3 is connected to the status monitoring transmitter of the gate hoist through the communication module 5. The status monitoring transmitter includes an opening sensor, a pressure sensor and a transmitter for monitoring the real-time opening and closing opening and pressure signals of the gate hoist. The controller 3 is connected to a display screen for displaying the real-time opening and closing opening and pressure signals of this gate hoist and other gate hoists. Therefore, the controller 3 can display the real-time opening and closing opening and pressure signals of all gate hoists through the carried display screen, thereby realizing centralized monitoring and control.

[0021] In this embodiment, the bypass connecting pipe 2 is a high-pressure hose, which can withstand the pressure of the hydraulic oil and prevent rust inside the pipeline. The two ends of the high-pressure hose are connected to the main oil pipe 1 of this gate hoist and the main oil pipe 1 of other gate hoists through three-way joints. The installation is convenient and quick without affecting the original main oil pipe 1 structure.

[0022] In this embodiment, the main oil pipe 1 can be the left oil supply pipe, the right oil supply pipe, the control oil pipe or the return oil pipe of the hoist, respectively. Figure 2 As shown in a to d. Among them, the left oil supply pipe a and the right oil supply pipe b are used to supply oil to the hydraulic cylinder of the gate hoist respectively, providing power for the piston movement of the hydraulic cylinders on the left and right sides, thereby realizing the opening and closing operations of the gate. The control oil pipe c is mainly used to connect the control elements of the hydraulic system, such as the electromagnetic reversing valve, the manual reversing valve, etc., to realize the control of the hydraulic cylinder movement. The function of the return oil pipe d is to return the excess hydraulic oil in the hydraulic cylinder or the hydraulic oil after the work is completed to the oil tank to maintain the normal operation of the hydraulic system. It should be noted that when the left oil supply pipe a, the right oil supply pipe b, the control oil pipe c and the return oil pipe d are all controlled by the gate hoist distributed control device, the controller 3, the gear knob 4 and the communication module 5 of each gate hoist distributed control device can be independent of each other, or the controller 3, the gear knob 4 and the communication module 5 can be shared.

[0023] In addition, if Figure 3 As shown, this embodiment also provides an application method of a distributed control device for a gate hoist of a hydropower station, comprising the following steps: S101, each distributed control terminal monitors the gear position operation of the gear knob 4 and the gear position operation broadcast from other distributed control terminals through the controller 3. If any distributed control terminal monitors the gear position operation of the gear knob 4, it jumps to step S102; if any distributed control terminal monitors the gear position operation broadcast from other distributed control terminals, it jumps to step S103; S102 indicates that the operator is operating the current distributed control terminal and is controlling the opening of either the main control valve 11 or the bypass control valve 21 corresponding to the hoist according to the gear position operation of the gear knob 4. The current distributed control terminal becomes the master node, which sends a gear position operation broadcast to other distributed control terminals, and the process jumps to step S101. S103 indicates that the operator is operating other distributed control terminals. The current distributed control terminal becomes a slave node. The slave node controls the opening of the main control valve 11 and the bypass control valve 21 corresponding to the gate machine according to the gear operation information carried in the gear operation broadcast.

[0024] In step S102 of this embodiment, when a gear operation broadcast is sent to other distributed control terminals, the sent gear operation broadcast carries the current timestamp. In step S101, after any distributed control terminal detects a gear operation broadcast from another distributed control terminal and before jumping to step S103, the process further includes parsing the gear operation broadcast to extract the timestamp carried therein. If the carried timestamp and the current timestamp exceed a preset threshold, the gear operation broadcast is determined to be invalid, and the process ends and jumps to step S101. Otherwise, the gear operation broadcast is determined to be valid, and the process jumps to step S103. In this embodiment, the gear operation broadcast uses the json data format, consisting of two data fields: a timestamp and a data payload. The data payload is used to record the gear operation information, etc., of the gear operation broadcast.

[0025] In step S102 of this embodiment, when a gear operation broadcast is sent to other distributed control terminals, the gear operation broadcast sent is encrypted data with the signature of the distributed control terminal, and the encrypted data is generated by encrypting the master node's unique number UUID; in step S101, after any distributed control terminal detects the gear operation broadcast from other distributed control terminals and before jumping to step S103, the gear operation broadcast is also verified by signature and decrypted using the master node's unique number UUID. If the signature verification fails or the decryption fails, the gear operation broadcast is determined to be an invalid gear operation broadcast, and the process ends and jumps to step S101; otherwise, the gear operation broadcast is determined to be a valid gear operation broadcast, and the process jumps to step S103. Since the master node will change dynamically due to the gear operation, the master node's unique number UUID is used as the encryption key, which is equivalent to using the dynamically changing master node information in all gate hoists for encryption, forming three encryption security mechanisms: signature, encryption algorithm, and dynamically changing master node information, which can effectively improve the security of the gear operation broadcast.

[0026] In summary, the distributed control device for the gate hoist of the hydropower station in this embodiment includes a plurality of distributed control terminals corresponding to the gate hoists of the hydropower station. The hydropower station includes N gate hoists, and the main oil pipe 1 of each gate hoist is connected to the main oil pipe 1 of other gate hoists through N-1 bypass connecting pipes 2. A main control valve 11 is installed on the main oil pipe 1, and a bypass control valve 21 is installed on each bypass connecting pipe 2. The distributed control terminal includes a controller 3, a gear knob 4 and a communication module 5. The control ends of the main control valve 11 and the bypass control valve 21 are respectively connected to the output end of the controller 3, and the gear knob 4 is connected to the control module 5. The controller 3 is connected to control the selective opening of the main control valve 11 and the bypass control valve 21, and the controller 3 is connected to the communication module 5 for communication with other distributed control terminals. The main oil pipeline 1 between the gate hoists is interconnected through the distributed control terminal and the bypass connecting pipe 2, so that the two gate hoists and their distributed control terminals can be backed up for each other. By using any normal distributed control terminal, the gate corresponding to the faulty gate hoist or other normal gate hoists can be controlled to realize emergency opening and closing of the gate. Moreover, it is more convenient and quick for the operator to use and other gate hoists can be operated at any gate hoist.

[0027] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed above with reference to the preferred embodiment, it is not intended to limit the present invention. Therefore, any simple modifications, equivalent variations, and modifications to the above embodiment that do not depart from the technical solution of the present invention and are based on the technical essence of the present invention shall fall within the scope of protection of the technical solution of the present invention.

Claims

1. A distributed control device for a gate hoist of a hydropower station, characterized in that: The invention comprises a plurality of distributed control terminals corresponding to the gate hoists of a hydropower station, wherein the hydropower station comprises N gate hoists, and the main oil pipe (1) of each gate hoist is connected to the main oil pipe (1) of other gate hoists through N-1 bypass connecting pipes (2), the main oil pipe (1) is installed with a main control valve (11), and each bypass connecting pipe (2) is installed with a bypass control valve (21), the distributed control terminal comprises a controller (3), a gear knob (4) and a communication module (5), the control ends of the main control valve (11) and the bypass control valve (21) are respectively connected to the output end of the controller (3), the gear knob (4) is connected to the controller (3) for controlling the selective opening of the main control valve (11) and the bypass control valve (21), and the controller (3) is connected to the communication module (5) for communication connection with other distributed control terminals.

2. The distributed control device for a gate hoist of a hydropower station according to claim 1, characterized in that: The gear knob (4) has N gears, and each gear is used to selectively open one of the main control valve (11) and the bypass control valve (21) and close the other control valves.

3. The distributed control device for a hoist of a hydropower station according to claim 1, characterized in that: The controller (3) is connected to a state monitoring transmitter of a gate hoist via a communication module (5). The state monitoring transmitter comprises an opening sensor, a pressure sensor and a transmitter for monitoring the real-time opening and closing opening and pressure signals of the gate hoist. The controller (3) is connected to a display screen for displaying the real-time opening and closing opening and pressure signals of the gate hoist and other gate hoists.

4. The distributed control device for a hoist of a hydropower station according to claim 1, characterized in that: The bypass connecting pipe (2) is a high-pressure hose, and both ends of the high-pressure hose are connected to the main oil pipe (1) of the gate hoist and the main oil pipe (1) of other gate hoists respectively through three-way joints.

5. The distributed control device for a hoist of a hydropower station according to claim 1, characterized in that: The main oil pipe (1) is a left oil supply pipe, a right oil supply pipe, a control oil pipe or an oil return pipe of the gate hoist.

6. An application method of the distributed control device for a hoist of a hydropower station according to any one of claims 1 to 5, characterized in that: The steps include: S101, each distributed control terminal monitors the gear operation of the gear knob (4) and the gear operation broadcast from other distributed control terminals through the controller (3). If any distributed control terminal monitors the gear operation of the gear knob (4), it jumps to step S102; if any distributed control terminal monitors the gear operation broadcast from other distributed control terminals, it jumps to step S103; S102 indicates that the operator is operating the current distributed control terminal, and controls the opening of the main control valve (11) and the bypass control valve (21) corresponding to the hoist according to the gear operation of the gear knob (4). The current distributed control terminal becomes the master node, and the master node sends the gear operation broadcast to other distributed control terminals, and jumps to step S101; S103 indicates that the operator is operating other distributed control terminals. The current distributed control terminal becomes a slave node. The slave node controls the opening of the main control valve (11) and the bypass control valve (21) corresponding to the hoist according to the gear operation information carried in the gear operation broadcast.

7. The application method of the distributed control device for a hoist of a hydropower station according to claim 6, characterized in that: When sending a gear operation broadcast to other distributed control terminals in step S102, the sent gear operation broadcast carries the current timestamp; after any distributed control terminal detects the gear operation broadcast from other distributed control terminals in step S101 and before jumping to step S103, the gear operation broadcast is further parsed to extract the timestamp carried therein; if the timestamp carried and the current timestamp exceed a preset threshold, the gear operation broadcast is determined to be an invalid gear operation broadcast, and the process ends and jumps to step S101; Otherwise, it is determined that the gear position operation broadcast is a valid gear position operation broadcast, and the process jumps to step S103.

8. The application method of the distributed control device for a hoist of a hydropower station according to claim 6, characterized in that: When sending a gear operation broadcast to other distributed control terminals in step S102, the gear operation broadcast sent is encrypted data with the signature of the distributed control terminal, and the encrypted data is generated by encrypting the unique number UUID of the master node; in step S101, after any distributed control terminal monitors the gear operation broadcast from other distributed control terminals and before jumping to step S103, it also includes signature verification of the gear operation broadcast and decryption using the unique number UUID of the master node. If the signature verification fails or the decryption fails, the gear operation broadcast is determined to be an invalid gear operation broadcast, and the process ends and jumps to step S101; otherwise, the gear operation broadcast is determined to be a valid gear operation broadcast, and the process jumps to step S103.

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