CN220059780U - Hydropower station hydraulic generator mechanical brake state on-line monitoring device and system - Google Patents

Abstract

The utility model provides a hydroelectric power station hydraulic generator machinery stopper state on-line monitoring device and system, includes device body, equipment district, is equipped with machinery stopper in the equipment district, is equipped with man-machine interaction screen, operation district, input terminal and output terminal on the device body, and the inside controller that is equipped with of device body, the input and the operation district electricity of controller are connected, and the controller passes through input terminal and is connected and detect machinery stopper's state in the equipment district, and the action of controller through output terminal control machinery stopper. The state of the mechanical brake is judged more accurately by adopting the displacement sensor and the non-contact proximity switch, the monitoring reliability of the mechanical brake is improved, the field efficiency and the installation efficiency are improved, the unit damage caused by unsuccessful switching of the mechanical brake is avoided, and the action condition and the displacement of each group of mechanical brake can be monitored by the digital display instrument and the indicator lamp, so that the field staff can be reminded and warned at the first time.

Description

Hydropower station hydraulic generator mechanical brake state on-line monitoring device and system

Technical Field

The utility model relates to the technical field of electric automatic control of hydropower stations, in particular to an on-line monitoring device and system for the state of a mechanical brake of a hydropower station hydraulic generator.

Background

The hydraulic generator brake (commonly called air brake) is an important component in a mechanical braking system of the unit, and the mechanical braking system consists of a brake, an oil air path and a manual and automatic control device and has the main functions of (1) avoiding long-time running at low rotation speed in the shutdown process of the unit and rapidly braking; (2) Lifting the rotor by a jack during installation or maintenance of the unit; (3) preventing the machine set in the off-line state from rotating. (4) facilitating the reestablishing of the oil film by the plastic tile machine set. The mechanical brake air brake is very important equipment of a hydropower plant, the equipment must work stably and reliably to ensure the safe operation of a hydropower plant unit, if false alarm conditions occur in the monitoring of the mechanical brake air brake, the starting-up flow of the unit can be influenced to cause the failure of the starting-up of the unit, and more serious machine shutdown can be caused to cause huge economic loss for a power plant.

The electric part of the mechanical brake air brake mainly adopts a position switch to convert the mechanical displacement of the air brake into an electrical signal of switching value, and the electrical signal is sent to the unit LCU flow judgment, thereby providing a basis for the operation of operators. The travel switch is a common small-current master control electric appliance, and the contact of the travel switch is made to act by utilizing the collision of the production mechanical moving parts to realize the connection or disconnection of a control circuit, so as to achieve a certain control purpose. In an electrical control system, the position switch is used for realizing sequential control, positioning control and detection of position states and is used for controlling the stroke and limiting protection of mechanical equipment. In the mechanical brake control system, a travel switch is fixedly arranged on a bracket, a rigid pulling strip is fixedly arranged on a brake air brake body, and the pulling strip moves up and down along with the action of the air brake body. When the strip pulling action reaches a certain fixed position, a travel switch operation contact is triggered, a normally open node in the travel switch is closed, and a normally closed node is opened; when the pulling bar leaves the fixed position, the travel switch operates the contact to reset, the normally open node of the internal node is disconnected, and the normally closed node is connected, so that the conversion of the actual position signal of the brake air brake from a mechanical signal to an electrical signal is realized. Actual operation experience of the brake air brake shows that misoperation and refusal of the air brake often exist in the normal operation process of the unit, the brake ring of the unit is directly worn out when serious operation happens, the air brake is damaged, a large amount of smoke dust is generated, and forced overhaul and heavy economic loss of the unit are caused. Therefore, the brake is not only simple in contact signal return, action commands are issued, the process is controlled on the detail processing of the mounting bracket, and much consideration should be given to the aspects of brake displacement and state monitoring.

The domestic traditional checking mechanical brake travel switch adopts a static method, only has the checking of mechanical brake travel switch elements, only can check single elements, does not have the full travel digital quantity checking function of lifting and falling of the brake, and has the result of being uncorrupted if a sensor does not dynamically simulate the checking to cause unit accidents. The misoperation and refusal of the brake air brake mainly have the following reasons: relay node shake or body failure; the performance of the travel switch cannot be detected in place, and the damage of the body or the node cannot be found in advance; the travel switch is not in place due to the fact that the mechanical dead zone is bigger; the travel switch is loose or offset due to the fact that the mounting bracket is loose or offset, so that the node signal is not in place.

Disclosure of Invention

The utility model aims to solve the technical problems of providing an on-line monitoring device and an on-line monitoring system for the state of a mechanical brake of a hydraulic generator of a hydropower station, optimizing the monitoring mode of the state of the mechanical brake, adopting a displacement sensor and a non-contact proximity switch, judging the state of the mechanical brake more accurately, improving the monitoring reliability of the mechanical brake, improving the field efficiency and the installation efficiency, avoiding the damage to a unit caused by unsuccessful throwing and retreating of the mechanical brake, and solving the problems in the background art. The lifting height is flexibly adjusted through the screw rod structure, so that the adaptability is strong, and the assembly is convenient; the whole device is reasonable and compact in structure, high in stability, convenient to move and position and extremely high in practicability.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the utility model provides a hydroelectric power station hydraulic generator machinery stopper state on-line monitoring device and system, on-line monitoring device includes the device body, be equipped with the equipment district on the device body, be equipped with machinery stopper in the equipment district, be equipped with man-machine interaction screen on the device body, the operation district, input terminal and output terminal, the inside controller that is equipped with of device body, the input and the operation district electricity of controller are connected, the controller passes through input terminal and is connected and detect machinery stopper's state in the equipment district, the action of controller through output terminal control machinery stopper, whether match detection machinery stopper's state through detecting control action and state.

The equipment area is provided with a displacement sensor and a proximity switch which are connected with the mechanical brake, and the displacement sensor and the proximity switch are used for detecting the position information of the mechanical brake.

The displacement sensor and the proximity switch are electrically connected with the controller through the input terminal, the controller is electrically connected with the driver through the output terminal, the driver is electrically connected with the stepping motor, and the stepping motor is connected with the mechanical brake.

The operation area is internally provided with a switching handle, an emergency stop button, a jacking button and a falling button.

An indicator light is arranged in the operation area.

The man-machine interaction screen is in communication connection with the controller.

The controller is electrically connected with the LCU unit.

The on-line monitoring device and system for the state of the mechanical brake of the hydraulic generator of the hydropower station are reasonable in structural design, convenient to install, simple to operate and complete in function, breaks through the traditional contact type position switch monitoring mode, adopts a non-contact type proximity switch and displacement sensor mode for monitoring the state of the mechanical brake for the first time in the industry, innovatively adopts a non-contact type switch quantity and analog quantity state comprehensive judging mode, greatly improves the state monitoring reliability of the mechanical brake due to high accuracy of the non-contact type position switch operation, effectively improves the data acquisition reliability of the mechanical brake, effectively avoids misoperation and refusal operation conditions caused by mechanical dead zones and operation dead zones of the contact type position switch, greatly improves the operation safety of the mechanical brake, and reduces the risks of misoperation and equipment damage of the mechanical brake. The displacement of each group of mechanical brake actions can be observed in real time through the displacement sensor, and the displacement is assisted and recorded in the data of the industrial personal computer and the PLC, so that the subsequent health state analysis by adopting a big data means is facilitated. The action condition and displacement of each group of mechanical brakes can be monitored through the digital display instrument and the indicator lamp, so that on-site staff can be reminded and warned at the first time. Related data and states can be checked through the industrial personal computer, and functions such as a one-key full-automatic starting function, a batch verification function, a reciprocating automatic control function, an action speed adjusting function, an emergency stop function, an online monitoring function and the like can be realized by combining the PLC, so that the intelligent monitoring system is more scientific and visual to monitor, and is more suitable for field application environments.

Drawings

The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:

FIG. 1 is a schematic diagram of an on-line monitoring device according to the present utility model;

FIG. 2 is a rear view of the on-line monitoring device of the present utility model;

FIG. 3 is a schematic diagram of the structure of the device area;

fig. 4 is a block diagram of the structure of the on-line monitoring system.

In the figure: the human-computer interaction screen 1, an operation area 2, an indicator lamp 21, a switching handle 22, an emergency stop button 23, a jacking button 24, a drop button 25, an equipment area 3, a mechanical brake 31, a displacement sensor 32, a proximity switch 33, a device side 4, a device front 5, an input terminal 53, an output terminal 54, a controller 6, a driver 7, a stepping motor 8, a power module 9, a device body 10 and an LCU unit 11.

Detailed Description

As shown in fig. 1-4, the on-line monitoring device and system for the mechanical brake state of the hydraulic generator in the hydropower station comprises a device body 10, wherein a device area 3 is arranged on the device body 10, a mechanical brake 31 is arranged in the device area 3, a man-machine interaction screen 1, an operation area 2, an input terminal 53 and an output terminal 54 are arranged on the device body 10, a controller 6 is arranged in the device body 10, the input end of the controller 6 is electrically connected with the operation area 2, the controller 6 is connected with the device area 3 through the input terminal 53 and detects the state of the mechanical brake 31, the controller 6 controls the action of the mechanical brake 31 through the output terminal 54, and the state of the mechanical brake is detected by detecting whether the control action is matched with the state.

In the operation area 2, a command is output to the operation of the mechanical brake 31 by a control button or a handle, and the controller 6 receives the command and controls the operation of the mechanical brake 31 by an output terminal 54, and the state of the mechanical brake 31 fed back by an input terminal 53 is compared with the operation to determine the state of the mechanical brake 31.

The above-described equipment area 3 is provided with a displacement sensor 32 and a proximity switch 33 connected to the mechanical brake 31, and the displacement sensor 32 and the proximity switch 33 are used to detect positional information of the mechanical brake 31.

The mounting bracket of the proximity switch 33 adopts a retractable air brake travel switch mounting bracket of patent application number 201921606892.4, and the mounting structure of the displacement sensor 32 adopts a multidirectional adjustable sensor support bracket of patent application number 201721059971.9.

The displacement sensor 32 and the proximity switch 33 are electrically connected to the controller 6 through the input terminal 53, the controller 6 is electrically connected to the driver 7 through the output terminal 54, the driver 7 is electrically connected to the stepping motor 8, and the stepping motor 8 is connected to the mechanical brake 31.

The operation area 2 is provided with a switching knob 22, an emergency stop button 23, a jack-up button 24, and a drop button 25.

An indicator lamp 21 is provided in the operation area 2.

The man-machine interaction screen 1 is in communication connection with the controller 6.

The controller 6 is electrically connected to the LCU unit 11.

The controller 6 may employ a PLC or a single chip microcomputer.

Examples:

in order to achieve the above purpose, the utility model adopts the following technical scheme: the system comprises a display area 1, an operation area 2, an equipment area 3, a device side surface 4, a device front surface 5, and a device inside is provided with a PLC controller 6, a driver 7, a stepping motor 8 and a power module 9.

The display area 1 comprises an industrial personal computer and an industrial personal computer mounting bracket, wherein the industrial personal computer mounting bracket is fixed at the upper left corner of the plane of the box body in a welding connection mode with the upper plane of the box body; the industrial personal computer is embedded on the industrial personal computer mounting bracket and is fixed by bolts.

The operation area 2 comprises a 21 indicator lamp, a 22 switching handle, a23 emergency stop button, a 24 jacking button, a 25 falling button and a digital display instrument; the operation area is arranged in the left side area of the front surface of the box body, and the indicator lamps are arranged in the first row of the left side area; the switching handle, the scram button, the jacking button and the falling button are arranged below the indicator lamp and are collectively called as control buttons.

The equipment area comprises a 31 mechanical brake model, a 32 displacement sensor and a 33 proximity switch; six groups of mechanical brake models are arranged, an upper row and a lower row are adopted and are uniformly arranged in a right side area of the front face of the box body side by side, and the mechanical brake models are adopted and matched with the field actual equipment 1:1, an electric control mode of the height; the two sides of the mechanical brake model are provided with a displacement sensor and a proximity switch by brackets; the proximity switch mounting bracket adopts the patent application of the telescopic air brake travel switch mounting bracket, and the patent number is 201921606892.4. The displacement sensor mounting bracket adopts a multidirectional adjustable sensor support bracket of patent number 201721059971.9 filed by the inventor.

Push handles are designed on two sides of the side surface 4 of the device so as to facilitate movement; the bottom of the device is provided with a group of universal wheels which are convenient for fixing the device, and the bottom of the device is also provided with a group of movable wheels which are convenient for movement.

The left side of the front surface of the device is provided with a power socket, a power switch 5, an input terminal 53 and an output terminal 54; the power socket provides an AC220V main power supply for the body device, the output end of the power socket is connected with the power switch, and the output end of the power switch is connected with the power module and used for controlling the main power supply of the body device; the input wiring terminal and the output wiring terminal are used for signal transfer, so that test wiring is facilitated; one end of the input connecting terminal is connected with signals such as a displacement sensor, a proximity switch, a control button and the like, and the other end of the input connecting terminal is connected with the input module of the PLC controller; one end of the output wiring terminal is connected with an indicator lamp of the device, and the other end of the output wiring terminal is connected with an output module of the PLC.

The power module, the PLC controller, the stepping motor and the driver are designed in the box body. The input end of the power supply module is connected with the power switch, and the output end of the power supply module is respectively connected with the industrial personal computer, the PLC, the stepping motor and the driver and provides a working power supply. The input end of the stepping motor is connected with the PLC switching-out module and the output wiring terminal, and the output end of the stepping motor is connected with the driver. And the output end of the driver is connected with the mechanical brake model and is used for driving the mechanical brake to act. And the two sides of the mechanical brake model are provided with a displacement sensor and a proximity switch by using brackets.

The PLC controller comprises a CPU module, a DI module, a DO module, an AI module, an AO module, a power module and a communication module, wherein the CPU module of the PLC controller and the industrial personal computer adopt a communication mode for data transmission; the DI module collects a switching handle, an emergency stop button, a jacking button, a falling button, a proximity switch, a driver fault alarm signal, a mechanical brake running state and a fault signal; the DO module outputs signals such as a stepping motor driving control command, a mechanical brake running state signal, a proximity switch and the like and is used for controlling the lifting and falling of the mechanical brake model; the AI module acquires the displacement analog quantity of each group of mechanical brake displacement sensors, and the AO module outputs the displacement analog quantity of each group of mechanical brakes to the digital display instrument; the power supply module is used for a DI module, a DO module, an AI module, an AO module power supply, an industrial personal computer, a digital display instrument, an indicator lamp, a stepping motor and a driver of the PLC. The industrial personal computer is used for displaying analog quantity signals of a displacement sensor of the mechanical brake, switching value action records of a proximity switch of the mechanical brake, running state signals of the mechanical brake and comprehensive signals processed by PLC logic.

Further, the PLC controller preferably adopts a CPU module of BMEP582020, a BMXCPS2010 power module, a BMX DDI 1602 DI module, a BMX DRA 1605 DO module, a BMX NRP 0201 communication module, a BMX AMI 0410 AI module, a BMX AMO 0410 AO module, and a BMXEAE0300 SSI module.

Further, the industrial personal computer preferably adopts schrader HMI GTO5310.

Further, the indicator light preferably adopts Schneider red XB2-BVM4LC and green XB2-BVB3LC.

Further, the switching handle adopts Schneider two-bit self-locking switches XB2-BG45CZB2BZ105C+ZB2BG4C.

Further, the digital display instrument adopts a rainbow instrument, specifically NHR-1100D-27-X/XP-D, and the measuring range is that: 4-20 mA/0-1000, precision: 0.3%, power: DC12-36V.

Further, the power module employs a weidhuller brand PRO DM 20, 20A.

Further, the control button adopts Schneider XB2BW33M1CZB2BWM31C+ZB2BW33C.

Further, the stepper motor adopts RM5A series products of Sanyang SANYO.

Further, the drive employs RORZE brand RD-053MS.

Further, the mechanical brake model adopts the original structural size.

Further, the displacement sensor adopts RHM0250MR051A01 of MTS series, and the measurement range is as follows: 0-250 mm, power supply: 24VDC, output: 4-20 mA, power consumption: < 3W, repetition accuracy: < full scale ± 0.001 (minimum ± 1 um), protection rating: IP65 with 4M 5 x 20 screws with 5M cable.

Further, the proximity switch employs schrader brand XS4P18MA230 product.

The working principle of the utility model is as follows:

firstly, respectively mounting a displacement sensor and a proximity switch on a mechanical brake model mounting bracket, and connecting a signal wire of the displacement sensor and the proximity switch to an input wiring terminal; the mains supply is connected into the power socket, the power switch is connected, and the power conversion module supplies AC220V and DC24V power to all equipment of the device, so that the device can work normally. The analog quantity collected by the displacement sensor and the switching value collected by the proximity switch are transmitted to a DI module and an AI module of a PLC (programmable logic controller) in the box body through wires, the CPU module of the PLC performs data processing and analysis, signals of the PLC are output to an indicator lamp through a DO module according to data processing results, and the action displacement analog quantity of each group of mechanical brakes is output to a digital display instrument through the AO module. The PLC controller is communicated with the industrial personal computer through the communication module, and related information is displayed on the industrial personal computer page. The DI module of the PLC collects control signals such as an emergency stop button, a jacking button, a falling button and the like, after the control signals are processed by a CPU module program, the control signals are output to the stepping motor through the DO module, and then the driver is driven to drive the mechanical brake to act, and the displacement sensor and the proximity switch signals of the mechanical brake are sent to the PLC to further check the data collection accuracy. When an abnormal accident occurs on site, the device is stopped to work and run through the emergency stop button, meanwhile, the industrial personal computer displays event records and state information, and an alarm signal is sent out through the indicator lamp so as to remind workers. The check data and the real-time curve can be checked in real time through the industrial personal computer so as to determine the real situation of the test site, and the real situation is compared with the positions of the displacement sensor and the proximity switch so as to be convenient for decision making.

Claims (6)

1. Hydropower station hydraulic generator mechanical brake state on-line monitoring device and system, characterized by: the on-line monitoring device comprises a device body (10), wherein an equipment area (3) is arranged on the device body (10), a mechanical brake (31) is arranged in the equipment area (3), a man-machine interaction screen (1), an operation area (2), an input terminal (53) and an output terminal (54) are arranged on the device body (10), a controller (6) is arranged in the device body (10), the input end of the controller (6) is electrically connected with the operation area (2), the controller (6) is connected with the equipment area (3) through the input terminal (53) and detects the state of the mechanical brake (31), the controller (6) controls the action of the mechanical brake (31) through the output terminal (54), and the state of the mechanical brake is detected through detecting whether the control action is matched with the state or not;

the equipment area (3) is provided with a displacement sensor (32) and a proximity switch (33) which are connected with the mechanical brake (31), and the displacement sensor (32) and the proximity switch (33) are used for detecting the position information of the mechanical brake (31).

2. The on-line monitoring device and system for the mechanical brake state of the hydroelectric generator according to claim 1, wherein the displacement sensor (32) and the proximity switch (33) are electrically connected with the controller (6) through an input terminal (53), the controller (6) is electrically connected with the driver (7) through an output terminal (54), the driver (7) is electrically connected with the stepping motor (8), and the stepping motor (8) is connected with the mechanical brake (31).

3. The on-line monitoring device and system for the mechanical brake state of the hydroelectric generator according to claim 2, wherein a switching handle (22), an emergency stop button (23), a jack-up button (24) and a drop button (25) are arranged in the operating area (2).

4. The on-line monitoring device and system for the mechanical brake state of the hydroelectric generator according to claim 3, wherein an indicator lamp (21) is arranged in the operating area (2).

5. The on-line monitoring device and system for the mechanical brake state of the hydroelectric generator according to claim 4, wherein the man-machine interaction screen (1) is in communication connection with the controller (6).

6. The on-line monitoring device and system for the mechanical brake state of a hydroelectric generator according to claim 5, wherein the controller (6) is electrically connected with the LCU unit (11).