Vibration measuring and monitoring device for electrical panel cabinet and terminal strip of hydraulic power plant

Abstract

The utility model provides a hydraulic power plant electrical panel cabinet and terminal strip vibration measuring and monitoring device which is characterized in that the electrical panel cabinet is fixedly connected to the top of a bottom frame, a data receiver is installed on the top of the inner wall of the electrical panel cabinet, data collectors are installed at the positions, close to four corners, of the bottom of the inner wall of the electrical panel cabinet, and the data collectors are connected with a data storage device. And a mounting plate is mounted at the bottom of the inner wall of the electrical panel cabinet close to the back surface. According to the hydraulic power plant electrical panel cabinet and terminal strip vibration measuring and monitoring device provided by the utility model, through the design, the vibration condition in the electrical panel cabinet can be monitored in real time, the terminal loosening condition caused by vibration can be reduced, the vibration position of the electrical panel cabinet can be monitored in real time, timely maintenance by workers can be prompted, and the working efficiency is improved. And the design structure is simple, the manufacturing cost is low, the operation is convenient, and manpower and time cost can be greatly saved in the unit maintenance period at ordinary times by spending a small amount of economic cost.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical switch cabinets, in particular to a vibration measurement and monitoring device for electrical switch cabinets and terminal blocks in hydropower plants. Background Art

[0002] A power plant, whose full name is a hydropower plant, is a factory that converts the potential energy and kinetic energy of water into electrical energy. Its basic production process is as follows: water is diverted from a high place in a river or other reservoirs, and the pressure or flow rate of the water is used to impulse the water turbine to rotate, converting the gravitational potential energy and kinetic energy into mechanical energy. Then, the water turbine drives the generator to rotate, converting the mechanical energy into electrical energy.

[0003] An electrical switch cabinet is a cabinet installed in a hydropower plant. The vibration of the electrical switch cabinet will have a certain impact on the stable operation of the equipment inside the cabinet, and even some abnormal tripping situations may occur. The hydro-generating unit has the characteristics of rapid start and stop, and is an excellent peak shaving and frequency modulation power source for the power grid. Affected by dispatching instructions, reservoir capacity, water level and other factors, it is normal for many hydro-generating units to start and stop frequently.

[0004] During the start and stop process of the hydro-generating unit, it has to pass through the vibration area. Therefore, it is very likely that the electrical switch cabinet closer to the vibration area will be affected by vibration. The impact of a single vibration on the equipment inside the cabinet should be limited. However, after being affected many times, it may cause the loosening of the terminals, easily leading to maloperation and non-operation, etc., which will bring certain hidden dangers to the normal operation of the unit.

[0005] Therefore, it is necessary to provide a vibration measurement and monitoring device for electrical switch cabinets and terminal blocks in hydropower plants to solve the above technical problems. Content of the Utility Model

[0006] The utility model provides a vibration measurement and monitoring device for electrical switch cabinets and terminal blocks in hydropower plants, which solves the problem that the vibration generated during the start and stop process of the hydro-generating unit may cause the loosening of the terminals after a long time, thus easily leading to maloperation and non-operation.

[0007] To solve the above technical problems, the vibration measurement and monitoring device for electrical switch cabinets and terminal blocks in hydropower plants provided by the utility model includes: a chassis;

[0008] An electrical switch cabinet, which is fixedly connected to the top of the chassis. A data receiver is installed at the top of the inner wall of the electrical switch cabinet. Data collectors are installed at the positions near the four corners at the bottom of the inner wall of the electrical switch cabinet. A mounting plate is installed at the position near the back at the bottom of the inner wall of the electrical switch cabinet. An air inlet is provided on one side of the electrical switch cabinet. A cabinet door is rotatably connected to the front of the electrical switch cabinet, and an observation board is installed on the front of the cabinet door;

[0009] A data processing module, which includes a data processing module, an early warning module, a storage module, and a wireless transmission module. The data collector is a data acquisition module. The output end of the data acquisition module is connected to the input end of the data processing module. The output end of the data processing module is respectively connected to the input ends of the early warning module and the storage module. The output end of the data processing module is connected to the input end of the wireless transmission module;

[0010] At the bottom of the inner wall of the chassis near the four corners, holes for fixing are provided. The top of the mounting plate is connected to the top of the inner wall of the electrical panel cabinet. On the front of the mounting plate, a plurality of threaded holes are provided to facilitate the installation of terminals or other devices. A filter screen is installed at the position where the air inlet hole is provided on one side of the inner wall of the electrical panel cabinet. A lock is provided on the cabinet door, and an opening is provided at the position where the observation plate is installed on the cabinet door. The data collector includes a displacement sensor and a vibration sensor, among which the first ultrasonic displacement sensor, the second ultrasonic displacement sensor, the third ultrasonic displacement sensor, the fourth ultrasonic displacement sensor, and the vibration sensor are respectively connected to the DCV power supply. The wireless transmission module can transmit the processed data to the terminal or the computer.

[0011] Preferably, a lighting lamp is installed on the top of the inner wall of the electrical panel cabinet through a mounting base. An exhaust port is provided on the other side inside the electrical panel cabinet. An installation frame is installed on the other side of the electrical panel cabinet;

[0012] The position of the installation frame corresponds to that of the exhaust port.

[0013] Preferably, a protective cover is installed on the other side of the installation frame, and a heat dissipation fan is installed inside the installation frame through a fixing frame;

[0014] One side of the fixing frame contacts the protective cover, and the heat dissipation fan is for exhausting air.

[0015] Preferably, a support frame is installed on the bottom of the inner wall of the electrical panel cabinet. A sealing plate is installed on the front of the support frame through mounting bolts. A first rubber frame is installed on the bottom of the inner wall of the support frame. A silica gel strip is installed on the bottom of the inner wall of the first rubber frame;

[0016] The mounting bolts are threadedly connected to the positions on both sides inside the support frame, without affecting the mounting plate being clamped into the inside of the first rubber frame.

[0017] Preferably, a fixing frame is installed on the top of the inner wall of the electrical panel cabinet. A plurality of support springs are installed on the top of the inner wall of the fixing frame through a plurality of fixing pieces. The other end of the support spring is installed with a connecting plate;

[0018] The other ends of the plurality of support springs are connected to the top of the same connecting plate. The support springs provide support force and also have a shock absorption effect.

[0019] Preferably, a movable frame is installed at the bottom of the connecting plate, and a second rubber frame is installed on the inner surface of the movable frame;

[0020] An installation plate is installed between the second rubber frame and the first rubber frame, and the movable frame moves up and down inside the fixed frame.

[0021] Compared with the related art, the vibration measurement and monitoring device for the electrical switchgear and terminal block of a hydropower plant provided by the present utility model has the following beneficial effects:

[0022] The present utility model provides a vibration measurement and monitoring device for the electrical switchgear and terminal block of a hydropower plant. In order to monitor the vibration of the electrical switchgear of the hydropower plant in real time, first, a data collector composed of a displacement sensor and a vibration sensor is installed at the bottom of the inner wall of the electrical switchgear near the four corners, so that it can monitor the vibration of the electrical switchgear in real time. Then, a data receiver is installed at the top of the inner wall of the electrical switchgear, which can receive data in time and send it to a computer or a terminal through G wirelessly. Through this design, the vibration inside the electrical switchgear can be monitored in real time, the loosening of the terminals caused by vibration can be reduced, and the vibration position of the electrical switchgear can be monitored in real time, which can prompt the staff to perform timely maintenance. And this design has a simple structure, low cost, and convenient operation, and can save a large amount of manpower and time costs during the regular maintenance of the unit with a small amount of economic cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of the first embodiment of the vibration measurement and monitoring device for the electrical switchgear and terminal block of a hydropower plant provided by the present utility model;

[0024] Figure 2 is a schematic structural diagram of the heat dissipation holes provided by the present utility model;

[0025] Figure 3 is a schematic diagram of the data receiver provided by the present utility model;

[0026] Figure 4 is a flow chart of the data processing module provided by the present utility model;

[0027] Figure 5 is a schematic structural diagram of the second embodiment of the vibration measurement and monitoring device for the electrical switchgear and terminal block of a hydropower plant provided by the present utility model;

[0028] Figure 6 is a schematic structural diagram of the silica gel strip provided by the present utility model;

[0029] Figure 7 is a schematic structural diagram of the second rubber frame provided by the present utility model.

[0030] Reference numerals in the figure: 1, chassis; 2, electrical switchgear cabinet; 3, mounting frame; 4, protective cover; 5, cabinet door; 6, observation panel; 7, fixing frame; 8, cooling fan; 9, exhaust port; 10, data receiver; 11, mounting base; 12, lighting lamp; 13, mounting plate; 14, air inlet hole; 15, data collector; 16, fixing frame; 17, sealing plate; 18, first rubber frame; 19, silica gel strip; 20, support frame; 21, mounting bolt; 22, movable frame; 23, support spring; 24, fixing piece; 25, connecting plate; 26, second rubber frame. Detailed implementation manners

[0031] The present utility model will be further described below in conjunction with the accompanying drawings and implementation manners.

[0032] Please refer to Figure 1 , Figure 2 , Figure 3 , and Figure 4 , wherein, Figure 1 is a schematic structural diagram of the first embodiment of the vibration measurement and monitoring device for the electrical switchgear cabinet and terminal block in a hydropower plant provided by the present utility model; Figure 2 is a schematic structural diagram of the heat dissipation hole provided by the present utility model; Figure 3 is a schematic diagram of the data receiver provided by the present utility model; Figure 4 is a flow chart of the data processing module provided by the present utility model. The vibration measurement and monitoring device for the electrical switchgear cabinet and terminal block in a hydropower plant includes: a chassis 1;

[0033] An electrical switchgear cabinet 2, the electrical switchgear cabinet 2 is fixedly connected to the top of the chassis 1, a data receiver 10 is installed on the top of the inner wall of the electrical switchgear cabinet 2, data collectors 15 are installed at positions close to the four corners at the bottom of the inner wall of the electrical switchgear cabinet 2, a mounting plate 13 is installed at a position close to the back at the bottom of the inner wall of the electrical switchgear cabinet 2, an air inlet hole 14 is opened on one side of the electrical switchgear cabinet 2, a cabinet door 5 is rotatably connected to the front of the electrical switchgear cabinet 2, and an observation panel 6 is installed on the front of the cabinet door 5;

[0034] A data processing module, the data processing module includes a data processing module, an early warning module, a storage module and a wireless transmission module, the data collector 15 is a data acquisition module, the output end of the data acquisition module is connected to the input end of the data processing module, the output end of the data processing module is respectively connected to the input ends of the early warning module and the storage module, and the output end of the data processing module is connected to the input end of the wireless transmission module;

[0035] At the bottom of the inner wall of the chassis 1 near the four corners, there are holes for fixing. The top of the mounting plate 13 is connected to the top of the inner wall of the electrical panel cabinet 2. The front of the mounting plate 13 is provided with a plurality of threaded holes, which are convenient for installing terminals or other devices. A filter screen is installed at the position where the intake hole 14 is provided on one side of the inner wall of the electrical panel cabinet 2. A lock is provided on the cabinet door 5, and an opening is provided at the position where the observation plate 6 is installed on the cabinet door 5. The data collector 15 includes a displacement sensor and a vibration sensor, among which the first ultrasonic displacement sensor, the second ultrasonic displacement sensor, the third ultrasonic displacement sensor, the fourth ultrasonic displacement sensor and the vibration sensor are respectively connected to the DC24V power supply. The wireless transmission module can transmit the processed data to the terminal or the computer;

[0036] The specific method of the data processing module is as follows:

[0037] The Fourier transform is used to transform the signal sampled in time or space into the same signal sampled in time sequence or spatial frequency. In signal processing, the Fourier transform can reveal the important features of the signal, that is, its frequency components. For a vector containing n uniformly sampled points, its Fourier transform is is one of the n complex unit roots, where i is the imaginary unit. For x and y, the indices j and k range from 0 to n - 1. The Fourier transform spectrum analysis of the sampled signal is as follows: The data processing program with Matlab as the platform is as follows y = fft(x, N); % Perform fast Fourier transform on the signal mag = abs(y); % Obtain the amplitude of the Fourier transform f = n * fs / N; plot(f, mag); % Plot the amplitude varying with frequency plot(f(1:N / 2), mag(1:N / 2)); % Plot the amplitude varying with frequency before the Nyquist frequency. Perform spectrum analysis on the signals at different points and under different working conditions after sampling, and observe the influence of the vibration of the panel cabinet on the tightening degree of the screws on the terminal block inside the cabinet, so as to provide a certain theoretical reference for our daily maintenance.

[0038] At the top of the inner wall of the electrical panel cabinet 2, a lighting lamp 12 is installed through a mounting base 11. An exhaust port 9 is provided on the other side inside the electrical panel cabinet 2. An installation frame 3 is installed on the other side of the electrical panel cabinet 2;

[0039] The position of the installation frame 3 corresponds to that of the exhaust port 9. For specific reference Figure 2 The lighting lamp 12 is for auxiliary lighting.

[0040] On the other side of the installation frame 3, a protective cover 4 is installed. Inside the installation frame 3, a cooling fan 8 is installed through a fixing frame 7;

[0041] One side of the fixing frame 7 contacts the protective cover 4. The cooling fan 8 is for exhausting air and can exhaust the high-temperature air inside the electrical panel cabinet 2.

[0042] The working principle of the vibration measurement and monitoring device for the electrical switchgear and terminal block in a hydropower plant provided by the present utility model is as follows:

[0043] First, a data collector 15 composed of a displacement sensor and a vibration sensor is installed at the bottom near the four corners of the inner wall of the electrical switchgear 2, so that the vibration condition of the electrical switchgear 2 can be monitored in real time. Then, a data receiver 10 is installed at the top of the inner wall of the electrical switchgear 2, which can receive data in time and send it to a computer or a terminal through 5G wirelessly. During actual use, the data collector 15 composed of a displacement sensor and a vibration sensor sends the measured vibration data to a data processing module for classification and processing, and at the same time compares it with the set vibration frequency. If it is within the reasonable value range, the data will be stored through a storage module and will also be transmitted to the terminal through a wireless transmission module. If it exceeds the set range, an early warning will be given through an early warning module, and the early warning data stored in the storage module will also be transmitted to the terminal through the wireless transmission module.

[0044] Compared with the related technology, the vibration measurement and monitoring device for the electrical switchgear and terminal block in a hydropower plant provided by the present utility model has the following beneficial effects:

[0045] In order to monitor the vibration condition of the electrical switchgear 2 in a hydropower plant in real time, a data collector 15 composed of a displacement sensor and a vibration sensor is installed at the bottom near the four corners of the inner wall of the electrical switchgear 2, so that the vibration condition of the electrical switchgear 2 can be monitored in real time. Then, a data receiver 10 is installed at the top of the inner wall of the electrical switchgear 2, which can receive data in time and send it to a computer or a terminal through 5G wirelessly. Through this design, the vibration condition inside the electrical switchgear 2 can be monitored in real time, the loosening of terminals caused by vibration can be reduced, and the vibration position of the electrical switchgear 2 can be monitored in real time, which can prompt the staff to carry out timely maintenance. Moreover, this design has a simple structure, low cost, and convenient operation, and can save a large amount of labor and time costs during the normal maintenance of the unit with a small amount of economic cost.

[0046] Second Embodiment

[0047] Please refer to Figures 5 - 6 - Figure 7 , Figure 5 which is a schematic structural diagram of the second embodiment of the vibration measurement and monitoring device for the electrical switchgear and terminal block in a hydropower plant provided by the present utility model; Figure 6 which is a schematic structural diagram of the silica gel strip provided by the present utility model; Figure 7The structural schematic diagram of the rubber frame is provided for the present utility model. Based on the first embodiment of the present application, a vibration measurement and monitoring device for the electrical switchgear and terminal block in a hydropower plant is provided. Another vibration measurement and monitoring device for the electrical switchgear and terminal block in a hydropower plant is proposed in the second embodiment of the present application. The second embodiment is merely a preferred manner of the first embodiment, and the implementation of the second embodiment will not affect the independent implementation of the first embodiment.

[0048] Specifically, the difference of the vibration measurement and monitoring device for the electrical switchgear and terminal block in a hydropower plant provided by the second embodiment of the present application is that a support frame 20 is installed at the bottom of the inner wall of the electrical switchgear 2. A sealing plate 17 is installed on the front surface of the support frame 20 through mounting bolts 21. A first rubber frame 18 is installed at the bottom of the inner wall of the support frame 20. A silica gel strip 19 is installed at the bottom of the inner wall of the first rubber frame 18;

[0049] The mounting bolts 21 are threadedly connected to the positions on both sides inside the support frame 20, which does not affect the mounting plate 13 being inserted into the inside of the first rubber frame 18. The silica gel strip 19 can provide good support force and also has a shock absorption effect.

[0050] A fixing frame 16 is installed at the top of the inner wall of the electrical switchgear 2. A plurality of support springs 23 are installed at the top of the inner wall of the fixing frame 16 through a plurality of fixing pieces 24. The other end of the support spring 23 is installed with a connecting plate 25;

[0051] The other ends of the plurality of support springs 23 are connected to the top of the same connecting plate 25. The support springs 23 provide support force and also have a shock absorption effect. The positions of the support frame 20 and the fixing frame 16 correspond to each other.

[0052] A movable frame 22 is installed at the bottom of the connecting plate 25. A second rubber frame 26 is installed on the inner surface of the movable frame 22;

[0053] An installation plate 13 is installed between the second rubber frame 26 and the first rubber frame 18. The movable frame 22 moves up and down inside the fixing frame 16. The shapes of the support frame 20 and the fixing frame 16 refer to Figure 6 and Figure 7 .

[0054] Compared with the related art, the vibration measurement and monitoring device for the electrical switchgear and terminal block in a hydropower plant provided by the present utility model has the following beneficial effects:

[0055] In order to reduce the impact of vibration on the terminals on the mounting plate 13 inside the electrical panel cabinet 2, first, a support frame 20 is installed at the bottom of the inner wall of the electrical panel cabinet 2, and a first rubber frame 18 with a silica gel strip 19 is installed inside the support frame 20. The vibration from some directions can be absorbed through the silica gel strip 19 and the first rubber frame 18, and the front of the support frame 20 is sealed with a sealing plate 17. A fixing frame 16 is installed at the top of the inner wall of the electrical panel cabinet 2. Then, a plurality of support springs 23 are installed at the top of the inner wall of the fixing frame 16 through fixing pieces 24, and a movable frame 22 is installed at the other end of the support springs 23 through a connecting plate 25. A second rubber frame 26 is installed inside the movable frame 22, which can also absorb vibration from different directions. During actual use, only need to first snap the top of the mounting plate 13 into the inside of the second rubber frame 26, and push the movable frame 22 upward to compress the support springs 23, then the bottom of the mounting plate 13 can be snapped into the inside of the first rubber frame 18. After that, release the mounting plate 13, and affected by gravity and the thrust of the support springs 23, the bottom of the mounting plate 13 will contact the top of the silica gel strip 19, so that the mounting plate 13 is located between the support frame 20 and the fixing frame 16, and the bottom and top of the mounting plate 13 are respectively located inside the first rubber frame 18 and the second rubber frame 26. Through this design, the vibration of the electrical panel cabinet 2 can be filtered by the cooperation of the first rubber frame 18 and the second rubber frame 26 with the silica gel strip 19 and the support springs 23, reducing the impact on the terminals on the mounting plate 13.

[0056] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. An electrical panel cabinet and terminal block vibration measurement and monitoring device for a hydropower plant, characterized in that, Including: Chassis; Electrical panel cabinets, the electrical panel cabinets are fixedly connected to the top of the chassis. At the top of the inner wall of the electrical panel cabinets, a data receiver is installed. At the bottom of the inner wall of the electrical panel cabinets, data collectors are installed near the four corners. At the bottom of the inner wall of the electrical panel cabinets near the back, a mounting plate is installed. An air inlet is provided on one side of the electrical panel cabinets. A cabinet door is rotatably connected to the front of the electrical panel cabinets. An observation panel is installed on the front of the cabinet door. Data processing module, the data processing module includes a data processing module, an early warning module, a storage module and a wireless transmission module. The data collector is a data acquisition module. The output end of the data acquisition module is connected to the input end of the data processing module. The output end of the data processing module is respectively connected to the input ends of the early warning module and the storage module. The output end of the data processing module is connected to the input end of the wireless transmission module.

2. The vibration measurement and monitoring device for the electrical switchgear and terminal block of a hydropower plant according to claim 1, characterized in that, A lighting lamp is installed at the top of the inner wall of the electrical panel cabinets through a mounting base. An exhaust port is provided on the other side inside the electrical panel cabinets. A mounting frame is installed on the other side of the electrical panel cabinets.

3. The vibration measurement and monitoring device for the electrical switchgear and terminal block of a hydropower plant according to claim 2, characterized in that A protective cover is installed on the other side of the mounting frame. A heat dissipation fan is installed inside the mounting frame through a fixing frame.

4. The vibration measurement and monitoring device for the electrical switchgear and terminal block of a hydropower plant according to claim 1, wherein A support frame is installed at the bottom of the inner wall of the electrical panel cabinets. A sealing plate is installed on the front of the support frame through a mounting bolt. A first rubber frame is installed at the bottom of the inner wall of the support frame. A silica gel strip is installed at the bottom of the inner wall of the first rubber frame.

5. The vibration measurement and monitoring device for the electrical switchgear and terminal block of a hydropower plant according to claim 1, wherein A fixing frame is installed at the top of the inner wall of the electrical panel cabinets. A plurality of support springs are installed at the top of the inner wall of the fixing frame through a plurality of fixing pieces. The other end of the support spring is installed with a connecting plate.

6. The vibration measurement and monitoring device for the electrical switchgear and terminal block of a hydropower plant according to claim 5, characterized in that A movable frame is installed at the bottom of the connecting plate. A second rubber frame is installed on the inner surface of the movable frame.

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