Relay protection device for main transformer of hydropower station

Abstract

The utility model relates to the field of transformer relay protection, and discloses a hydropower station main transformer relay protection device which comprises a machine body and a mounting frame, a display screen is fixedly mounted on the surface of the machine body, a plurality of control buttons are slidably connected to the surface of the machine body, and a plurality of fixing bolts are clamped to the inner wall of the mounting frame. The multiple fixing bolts are divided into two sets, the two sets of fixing bolts are symmetrically distributed with the mounting frame as the axis, a containing groove is formed in the top of the mounting frame, two rotating wheels are rotatably mounted on the surface of the machine body, the bottom ends of the rotating wheels are slidably connected with the top of the mounting frame, and the inner wall of the mounting frame is slidably connected with the surface of the machine body; the mounting frame is mounted on the surface of the machine body, the two fixing bolts are clamped to the inner wall of the mounting frame, the two rotating wheels are mounted on the surface of the machine body, and the placement groove is formed in the top of the mounting frame, so that the machine body is conveniently and temporarily placed through the placement groove, and a worker can conveniently inspect a wire body at the rear end of the machine body.

Description

Technical Field

[0001] This application relates to the field of transformer relay protection, and in particular to relay protection devices for main transformers in hydropower stations. Background Technology

[0002] The main transformer in a hydropower station is a key piece of equipment. It primarily converts the electrical energy generated by the turbine generator from a lower voltage and higher current to a higher voltage and lower current for long-distance transmission. The main transformer operates on the principle of electromagnetic induction; its low-voltage side voltage corresponds to the output voltage of the turbine generator, while its high-voltage side voltage corresponds to the rated voltage of the power grid. Hydropower station main transformers are often protected by relay protection devices. Relay protection of the main transformer is an important safety measure used to detect faults or abnormalities in the power system and protect the safe and stable operation of the entire system by disconnecting the faulty section. Through real-time monitoring and analysis of electrical quantities in the power system, relay protection devices can accurately determine the type and location of faults and take corresponding protective measures. In conventional relay protection devices, one end of the device is connected to one end of the hydropower station transformer. A display screen is installed on the surface of the device to view its status, and several control buttons are also installed on the surface for convenient operation.

[0003] Regarding the aforementioned technologies, the inventors believe that conventional relay protectors are often installed using mounting brackets and bolts. This often requires disassembly of the protector during maintenance, as the wiring connected to the protector prevents direct disassembly. Consequently, when inspecting the protector's wiring, staff need assistance to secure the protector, causing inconvenience during maintenance.

[0004] The information disclosed in this background section is only intended to enhance the understanding of the background technology of this application, and therefore may include prior art that is not known to those skilled in the art. Utility Model Content

[0005] To address the issue of needing assistance in securing relay protection devices during maintenance, this application provides a relay protection device for the main transformer of a hydropower station.

[0006] The relay protection device for the main transformer of the hydropower station provided in this application adopts the following technical solution:

[0007] The relay protection device for the main transformer of a hydropower station includes a body and a mounting frame. A display screen is fixedly installed on the surface of the body, and several control buttons are slidably connected to the surface of the body. Several fixing bolts are snapped into the inner wall of the mounting frame. The fixing bolts are divided into two groups, and the two groups of fixing bolts are symmetrically distributed about the mounting frame. A placement groove is opened on the top of the mounting frame. Two rotating wheels are rotatably installed on the surface of the body, and the bottom ends of the rotating wheels are slidably connected to the top of the mounting frame. The inner wall of the mounting frame is slidably connected to the surface of the body. One end of each rotating wheel is rotatably installed on the surface of the body, and the two rotating wheels are symmetrically distributed about the body.

[0008] Preferably, the inner wall of the mounting bracket has two slots, which are symmetrically distributed about the mounting bracket. The inner wall of the slots is engaged with a limiting frame, one end of which is rotatably connected to a connecting frame, and one end of the connecting frame is fixedly connected to the surface of the machine body.

[0009] Preferably, one end of the limiting frame is engaged with a fixing spring, and one end of the limiting frame is fixedly installed to the inner wall of the connecting frame.

[0010] Preferably, the top of the mounting bracket has two fixing slots, which are symmetrically distributed about the mounting bracket, and the inner wall of the fixing slot is engaged with the surface of the rotating wheel. The dimensions of the inner wall of the fixing slot are compatible with the dimensions of the surface of the rotating wheel.

[0011] Preferably, a winding frame is rotatably mounted on the surface of the mounting frame, and a connecting rope is fixedly connected to the surface of the winding frame, with one end of the connecting rope being snapped into the surface of the machine body.

[0012] Preferably, the inner wall of the machine body is provided with a connecting groove, and a hook is engaged with the inner wall of the connecting groove. The cross-section of the hook is in the shape of a "J", and one end of the hook is fixedly connected to one end of the connecting rope.

[0013] Preferably, a return spring is fixedly connected to one end of the winding frame, the center of the return spring is on the same straight line as the center of the winding frame, and one end of the return spring is fixedly installed on the surface of the mounting frame.

[0014] In summary, this application includes the following beneficial technical effects:

[0015] 1. By mounting the mounting bracket on the surface of the machine body, two fixing bolts are snapped into the inner wall of the mounting bracket, and two rotating wheels are installed on the surface of the machine body. A placement slot is opened on the top of the mounting bracket to facilitate temporary placement of the machine body, thereby facilitating the inspection of the wiring at the rear end of the machine body by the staff. A slot is opened on the inner wall of the mounting bracket, and a limit bracket is snapped into the inner wall of the slot. One end of the limit bracket is rotatably connected to a connecting frame to fix the position of the machine body by means of the limit bracket and the slot. A fixing spring is installed on one end of the limit bracket to keep one end of the limit bracket snapped into the inner wall of the slot by means of the fixing spring. Compared with the existing technology, this method effectively improves the convenience of maintenance of relay protection equipment.

[0016] 2. Two fixing slots can also be made on the top of the mounting frame to prevent the machine body from shifting due to the rotation of the wheel. A winding frame is rotatably connected to the surface of the mounting frame, and a connecting rope is installed on the surface of the winding frame to prevent the machine body from falling off the mounting frame and pulling on the connected rope. A connecting groove is opened on the surface of the machine body, and a hook is engaged with the inner wall of the connecting groove to facilitate the separation of the hook from the connecting groove and disassembly of the machine body. A return spring is installed at one end of the winding frame to control the winding frame to wind up the connecting rope; effectively improving the performance of the device. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the relay protection device for the main transformer of the hydropower station in the application embodiment;

[0018] Figure 2 This is a schematic diagram of the mounting bracket structure in an embodiment of the application;

[0019] Figure 3 This is a side view of the embodiment of the application.

[0020] Figure 4 This is a schematic diagram of the structure at point A in the embodiment of the application.

[0021] Explanation of reference numerals in the attached drawings: 1. Machine body; 2. Display screen; 3. Control button; 4. Mounting bracket; 5. Fixing bolt; 6. Placement slot; 7. Rotary wheel; 8. Connecting frame; 9. Limiting bracket; 10. Card slot; 11. Fixing spring; 12. Fixing slot; 13. Connecting rope; 14. Rewinding frame; 15. Hook; 16. Connecting slot; 17. Return spring. Detailed Implementation

[0022] The following is in conjunction with the appendix Figure 1 —4. This application will be described in further detail.

[0023] This application discloses a relay protection device for the main transformer of a hydropower station, referring to... Figure 1 - Figure 2The system includes a main body 1. In use, one end of the main body 1 is connected to one end of the hydropower station transformer. A display screen 2 is installed on the surface of the main body 1 to view the status of the main body 1. Several control buttons 3 are also installed on the surface of the main body 1 for easy operation. A mounting bracket 4 is installed on the surface of the main body 1. Two fixing bolts 5 are snapped into the inner wall of the mounting bracket 4. The surface of the fixing bolts 5 is connected to the inside of the cabinet. Two rotating wheels 7 are installed on the surface of the main body 1. The bottom end of the rotating wheels 7 is slidably connected to the top of the mounting bracket 4. A placement slot 6 is opened on the top of the mounting bracket 4. The main body 1 is installed in the cabinet with the help of the mounting bracket 4. The placement slot 6 facilitates the temporary placement of the main body 1, thereby facilitating the inspection of the wiring at the rear end of the main body 1 by the staff and effectively improving the convenience of maintenance of the relay protection equipment.

[0024] Reference Figure 2 The inner wall of the mounting bracket 4 is provided with a slot 10, and the inner wall of the slot 10 is engaged with a limiting bracket 9. One end of the limiting bracket 9 is rotatably connected to a connecting frame 8, and one end of the connecting frame 8 is connected to the surface of the body 1. The limiting bracket 9 and the slot 10 are used to fix the position of the body 1, thereby ensuring that the body 1 is fixed in a suitable position. One end of the limiting bracket 9 is equipped with a fixing spring 11, and the bottom surface of the fixing spring 11 is connected to the inner wall of the connecting frame 8. The fixing spring 11 is used to push one end of the limiting bracket 9, keeping one end of the limiting bracket 9 engaged with the inner wall of the slot 10, thereby improving the connection effect between the limiting bracket 9 and the slot 10.

[0025] Reference Figure 3 - Figure 4 Two fixing slots 12 are provided on the top of the mounting frame 4. The inner wall of the fixing slot 12 is engaged with the surface of the rotating wheel 7. The fixing slots 12 facilitate the placement of the rotating wheel 7 and prevent the machine body 1 from shifting due to the rotation of the rotating wheel 7. A winding frame 14 is rotatably connected to the surface of the mounting frame 4. A connecting rope 13 is installed on the surface of the winding frame 14. One end of the connecting rope 13 is engaged with the surface of the machine body 1. The connecting rope 13 restricts the movement range of the machine body 1 and prevents the machine body 1 from falling off the mounting frame 4 and pulling on the connected cable. A connecting groove 16 is provided on the surface of the machine body 1. A hook 15 is attached to the inner wall of the groove 16. One end of the hook 15 is connected to one end of the connecting rope 13. The hook 15 and the groove 16 facilitate the connection of the connecting rope 13 to the machine body 1. Separating the hook 15 from the groove 16 facilitates the disassembly of the machine body 1. A return spring 17 is installed at one end of the winding frame 14. One end of the return spring 17 is connected to the surface of the mounting frame 4. The return spring 17 controls the winding frame 14 to wind up the connecting rope 13. After the machine body 1 is connected to the mounting frame 4, the connecting rope 13 is stored, avoiding the situation where the connecting rope 13 is scattered.

[0026] The implementation principle of the relay protection device for the main transformer of the hydropower station in this embodiment is as follows: A mounting bracket 4 is installed on the surface of the housing 1. Two fixing bolts 5 are snapped into the inner wall of the mounting bracket 4, and the surfaces of the fixing bolts 5 are connected to the inside of the cabinet. Two rotating wheels 7 are installed on the surface of the housing 1, and the bottom ends of the rotating wheels 7 are slidably connected to the top of the mounting bracket 4. A placement groove 6 is provided on the top of the mounting bracket 4 to facilitate the installation of the housing 1 into the cabinet. The placement groove 6 also facilitates temporary placement of the housing 1, thereby facilitating the inspection of the wiring at the rear end of the housing 1 by personnel. A retaining device is provided on the inner wall of the mounting bracket 4. The inner wall of the slot 10 is engaged with a limiting frame 9. One end of the limiting frame 9 is rotatably connected to a connecting frame 8. One end of the connecting frame 8 is connected to the surface of the machine body 1, so as to fix the position of the machine body 1 with the help of the limiting frame 9 and the slot 10, thereby ensuring that the machine body 1 is fixed in a suitable position. A fixing spring 11 is installed on one end of the limiting frame 9. The bottom surface of the fixing spring 11 is connected to the inner wall of the connecting frame 8, so as to push one end of the limiting frame 9 with the help of the fixing spring 11, keeping one end of the limiting frame 9 engaged with the inner wall of the slot 10, thereby improving the connection effect between the limiting frame 9 and the slot 10.

[0027] Two fixing slots 12 can also be provided on the top of the mounting frame 4. The inner wall of the fixing slot 12 is engaged with the surface of the rotating wheel 7, so as to facilitate the placement of the rotating wheel 7 and prevent the machine body 1 from shifting due to the rotation of the rotating wheel 7. A winding frame 14 is rotatably connected to the surface of the mounting frame 4. A connecting rope 13 is installed on the surface of the winding frame 14. One end of the connecting rope 13 is engaged with the surface of the machine body 1, so as to limit the movement range of the machine body 1 and prevent the machine body 1 from falling off the mounting frame 4 and pulling on the connected cable. A connecting slot 16 is provided on the surface of the machine body 1. A hook 15 is attached to the inner wall of the connecting groove 16. One end of the hook 15 is connected to one end of the connecting rope 13, so that the connecting rope 13 can be easily connected to the machine body 1 by means of the hook 15 and the connecting groove 16. Separating the hook 15 from the connecting groove 16 makes it easy to disassemble the machine body 1. A return spring 17 is installed at one end of the winding frame 14. One end of the return spring 17 is connected to the surface of the mounting frame 4, so that the return spring 17 can control the winding frame 14 to wind up the connecting rope 13. After the machine body 1 is connected to the mounting frame 4, the connecting rope 13 can be stored, avoiding the situation where the connecting rope 13 is scattered.

[0028] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A relay protection device for the main transformer of a hydropower station, comprising a body (1) and a mounting frame (4), characterized in that: The surface of the body (1) is fixedly mounted with a display screen (2), and several control buttons (3) are slidably connected to the surface of the body (1). Several fixing bolts (5) are snapped into the inner wall of the mounting frame (4). The fixing bolts (5) are divided into two groups, and the two groups of fixing bolts (5) are symmetrically distributed about the mounting frame (4). The top of the mounting frame (4) is provided with a placement groove (6). Two rotating wheels (7) are rotatably mounted on the surface of the body (1), and the bottom end of the rotating wheel (7) is slidably connected to the top of the mounting frame (4).

2. The relay protection device for the main transformer of a hydropower station according to claim 1, characterized in that: The inner wall of the mounting bracket (4) is slidably connected to the surface of the body (1), one end of the rotating wheel (7) is rotatably mounted to the surface of the body (1), and the two rotating wheels (7) are symmetrically distributed about the body (1) as an axis.

3. The relay protection device for the main transformer of a hydropower station according to claim 1, characterized in that: The inner wall of the mounting bracket (4) has two slots (10), which are symmetrically distributed about the mounting bracket (4). The inner wall of the slots (10) is fitted with a limiting bracket (9). One end of the limiting bracket (9) is rotatably connected to a connecting frame (8), and one end of the connecting frame (8) is fixedly connected to the surface of the body (1).

4. The relay protection device for the main transformer of a hydropower station according to claim 3, characterized in that: One end of the limiting frame (9) is engaged with a fixing spring (11), and one end of the limiting frame (9) is fixedly installed on the inner wall of the connecting frame (8).

5. The relay protection device for the main transformer of a hydropower station according to claim 1, characterized in that: The top of the mounting bracket (4) has two fixing slots (12), which are symmetrically distributed about the mounting bracket (4). The inner wall of the fixing slot (12) is engaged with the surface of the rotating wheel (7). The dimensions of the inner wall of the fixing slot (12) are compatible with the dimensions of the surface of the rotating wheel (7).

6. The relay protection device for the main transformer of a hydropower station according to claim 1, characterized in that: A winding frame (14) is rotatably mounted on the surface of the mounting frame (4), and a connecting rope (13) is fixedly connected to the surface of the winding frame (14). One end of the connecting rope (13) is snapped into the surface of the machine body (1).

7. The relay protection device for the main transformer of a hydropower station according to claim 1, characterized in that: The inner wall of the body (1) is provided with a connecting groove (16), and a hook (15) is engaged with the inner wall of the connecting groove (16). The cross section of the hook (15) is in the shape of a "J", and one end of the hook (15) is fixedly connected to one end of the connecting rope (13).

8. The relay protection device for the main transformer of a hydropower station according to claim 6, characterized in that: A return spring (17) is fixedly connected to one end of the winding frame (14). The center of the return spring (17) is on the same straight line as the center of the winding frame (14), and one end of the return spring (17) is fixedly installed on the surface of the mounting frame (4).

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