A power plant line protection device

Abstract

The utility model relates to power transmission line protection technical field discloses a kind of thermal power plant line protection devices, including protective shell, the inner wall rear side of protective shell is equipped with mounting plate, the outer wall front side of mounting plate is fixedly connected with current transformer, the outer wall upper and lower end of current transformer is equipped with electric wire, the outer wall front side middle part of mounting plate is equidistantly equipped with fixed mechanism, and the fixed mechanism is used to fix and distinguish line.In the utility model, rotating knob, knob will drive threaded rod to rotate in the inner wall of limiting block, threaded rod rotation will drive clamping block one, let clamping block one left and right slide on slide rail to close to clamping block two, clamping block one can be cooperated with clamping block two and hold electric wire, to realize the adaptive clamping of different diameter electric wire, fasten electric wire, make electric wire keep neat and orderly, prevent electric wire arrangement disorder, inconvenient operation, avoid dangerous caused by miswiring.

Description

Technical Field

[0001] This utility model relates to the field of power transmission line protection technology, and in particular to a power plant line protection device. Background Technology

[0002] A thermal power plant is a factory that uses combustibles as fuel to produce electricity. Its basic production process is that the fuel is burned in a boiler, converting chemical energy into heat energy, heating water to generate steam, and the steam pressure drives the turbine to rotate, converting heat energy into mechanical energy. The turbine then drives the generator to rotate, converting mechanical energy into electrical energy.

[0003] Line protection devices in thermal power plants are key equipment to ensure the safe and stable operation of the power plant's power system. They are mainly used to detect faults in power lines, such as short circuits, overloads, and grounding, and to issue alarm signals and trip commands in a timely manner to prevent the fault from escalating, avoid equipment damage, and prevent power grid outages.

[0004] In existing technologies, line protection devices in thermal power plants monitor electrical parameters such as line current, voltage, and power in real time, identify faults such as short circuits, overloads, overvoltages, undervoltages, and frequency anomalies, and distinguish fault types, such as transient faults and permanent faults, to provide a basis for protection actions. When a fault is detected, a trip command is quickly issued to disconnect the faulty line, isolate the fault point, and avoid affecting other equipment and the power grid. For transient faults, such as lightning strikes and short-term contact, automatic reclosing is supported to restore power supply to the line. However, the harsh environment of thermal power plants, characterized by strong electromagnetic interference and high temperature and humidity, can lead to malfunctions and failures of protection devices. While using a full metal shielded shell and a double-layer circuit board layout to isolate high-voltage and low-voltage circuits, and adding an electromagnetic compatibility filter module at the sensor end to suppress high-frequency harmonic interference, the dense wiring and chaotic terminal arrangement can easily lead to incorrect wiring and operational inconvenience, causing the protection device to misjudge fault signals. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a line protection device for thermal power plants, which aims to improve the problems in the existing technology where the line layout is dense, the wiring terminals are arranged in a disorderly manner, which easily leads to incorrect wiring and inconvenience in operation, resulting in the protection device misjudging fault signals.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a line protection device for a thermal power plant, comprising a protective shell, an mounting plate installed on the rear side of the inner wall of the protective shell, a current transformer fixedly connected to the front side of the outer wall of the mounting plate, wires installed at the upper and lower ends of the outer wall of the current transformer, a fixing mechanism equidistantly installed at the middle of the front side of the outer wall of the mounting plate, the fixing mechanism being used to fix and distinguish the lines, and mounting mechanisms installed on the left and right sides of the outer wall of the mounting plate, the mounting mechanisms being used to fix the mounting plate; the fixing mechanism includes a fixing block, the fixing block being equidistantly fixedly connected to the front side of the outer wall of the mounting plate, a connecting block being fixedly connected to the front end of the fixing block, a slide rail being fixedly connected to the upper middle part of the front side of the connecting block, a plurality of clamping blocks being equidistantly fixedly connected to the outer wall of the slide rail, and a driving assembly being installed on the front side of the outer wall of the connecting block.

[0007] As a further description of the above technical solution:

[0008] The driving component includes a limiting block, which is fixed to the left and right ends of the front side of the outer wall of the connecting block. A threaded rod is rotatably connected to the inner wall of the limiting block, and a knob is fixedly connected to the right end of the threaded rod.

[0009] As a further description of the above technical solution:

[0010] The outer wall of the slide rail is equidistantly connected with multiple clamping blocks, and the inner wall of each clamping block is threadedly connected to the outer wall of the threaded rod.

[0011] As a further description of the above technical solution:

[0012] The installation mechanism includes an installation block, which is fixedly connected at equal intervals to the rear side of the inner wall of the protective shell. A cavity is opened on the inner side of the installation block, and a rod is slidably connected to the inner wall of the cavity. A rotating shaft is rotatably connected to the left side of the inner wall of the rod, and a transmission component is installed on the inner wall of the rod.

[0013] As a further description of the above technical solution:

[0014] The transmission assembly includes a pull rod, which is slidably connected to the inner wall of the insert rod, and the outer wall of the pull rod has grooves on both the front and rear sides.

[0015] As a further description of the above technical solution:

[0016] A slider is installed on the right side of the inner wall of the insertion rod, and the slider is slidably connected to the inner wall of the groove.

[0017] As a further description of the above technical solution:

[0018] A relay is fixedly connected to the left end of the front side of the outer wall of the protective shell. A microprocessor is provided at the bottom of the relay and is fixedly connected to the front side of the outer wall of the protective shell.

[0019] As a further description of the above technical solution:

[0020] A protective door is rotatably connected to the right front end of the outer wall of the protective shell, and a handle is fixedly connected to the left front end of the outer wall of the protective door.

[0021] This utility model has the following beneficial effects:

[0022] 1. In this utility model, rotating the knob will cause the threaded rod to rotate on the inner wall of the limiting block. The rotation of the threaded rod will drive the clamping block one to slide left and right on the slide rail and move closer to the clamping block two. The clamping block one can cooperate with the clamping block two to clamp the wire, thereby realizing the adaptive clamping of wires of different diameters, tightening the wires, keeping the wires neat and orderly, preventing the wires from being arranged in a mess, making operation inconvenient, and avoiding the danger caused by incorrect wiring.

[0023] 2. In this utility model, the mounting plate is tightly attached to the rear side of the inner wall of the protective shell and flush with the mounting block. When the pull rod is pulled, the pull rod slides on the outer wall of the slider. When the pull rod moves outward, the wider part of the outer wall of the pull rod squeezes the rotating shaft. The rotating shaft rotates and drives the insertion rod to slide in the cavity, so that the insertion rod slides into the groove on the outer wall of the mounting plate and then inserts into the groove to form a stable connection. The operation is convenient and the replacement is convenient during maintenance and disassembly, which shortens the maintenance time and reduces the repair cost. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings.

[0025] Figure 1 This is a perspective view of a power plant line protection device proposed in this utility model.

[0026] Figure 2 This is a schematic diagram of the internal structure of a line protection device for a thermal power plant proposed in this utility model;

[0027] Figure 3 This is a partial structural schematic diagram of a line protection device for a thermal power plant proposed in this utility model;

[0028] Figure 4 This is a schematic diagram of the installation mechanism of a line protection device for a thermal power plant proposed in this utility model;

[0029] Figure 5 This is a partial structural exploded view of a power plant line protection device proposed in this utility model.

[0030] In the diagram: 1. Protective shell; 2. Mounting plate; 3. Fixing mechanism; 301. Fixing block; 302. Connecting block; 303. Clamping block one; 304. Clamping block two; 305. Drive assembly; 3051. Threaded rod; 3052. Limiting block; 3053. Knob; 306. Slide rail; 4. Mounting mechanism; 401. Mounting block; 402. Cavity; 403. Insert rod; 404. Rotating shaft; 405. Transmission assembly; 4051. Pull rod; 4052. Slide groove; 406. Slider; 5. Wire; 6. Current transformer; 7. Relay; 8. Microprocessor; 9. Protective door; 10. Handle. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Reference Figure 2 , Figure 3 and Figure 4This utility model provides an embodiment of a power plant line protection device, comprising a protective shell 1, an mounting plate 2 installed on the rear side of the inner wall of the protective shell 1, a current transformer 6 fixedly connected to the front side of the outer wall of the mounting plate 2, wires 5 installed at the upper and lower ends of the outer wall of the current transformer 6, a fixing mechanism 3 equidistantly installed at the middle of the front side of the outer wall of the mounting plate 2, the fixing mechanism 3 being used to fix and distinguish the lines, and mounting mechanisms 4 installed on the left and right sides of the outer wall of the mounting plate 2, the mounting mechanism 4 being used to fix the mounting plate 2; the fixing mechanism 3 includes A fixing block 301 is fixedly connected at equal intervals to the front side of the outer wall of the mounting plate 2. A connecting block 302 is fixedly connected to the front end of the fixing block 301. A slide rail 306 is fixedly connected to the upper middle part of the front side of the outer wall of the connecting block 302. Multiple clamping blocks 304 are fixedly connected at equal intervals to the outer wall of the slide rail 306. A driving assembly 305 is installed on the front side of the outer wall of the connecting block 302. The driving assembly 305 includes a limiting block 3052, which is fixed to the left and right ends of the front side of the outer wall of the connecting block 302. The inner side of the limiting block 3052... A threaded rod 3051 is rotatably connected to the wall, and a knob 3053 is fixedly connected to the right end of the threaded rod 3051. Multiple clamping blocks 303 are equidistantly slidably connected to the outer wall of the slide rail 306. The inner wall of the clamping blocks 303 is threadedly connected to the outer wall of the threaded rod 3051. By rotating the knob 3053, a series of precise mechanical actions can be achieved. The rotation of the knob 3053 drives the threaded rod 3051 to rotate within the inner wall of the limiting block 3052. The rotational motion of the threaded rod 3051 is transmitted to the clamping blocks 303 through its threaded structure. This allows clamping block 303 to slide left and right on slide rail 306 and move closer to clamping block 304. This moving closer action ensures that clamping block 303 and clamping block 304 fit tightly together, thereby achieving effective clamping of wire 5. This design allows the device to adapt to wires 5 of different diameters and achieve flexible clamping function. In this way, wire 5 can be firmly fixed and kept in a neat and orderly state, avoiding the inconvenience caused by messy wire arrangement and significantly reducing the safety risks that may be caused by incorrect wiring.

[0034] Specifically, rotating the knob 3053 will cause the threaded rod 3051 to rotate on the inner wall of the limit block 3052. The rotation of the threaded rod 3051 will drive the clamping block 303 to slide left and right on the slide rail 306 and move closer to the clamping block 304. The clamping block 303 can cooperate with the clamping block 304 to clamp the wire 5, thereby realizing the adaptive clamping of wires 5 of different diameters, tightening the wires 5, keeping the wires 5 neat and orderly, preventing the wires 5 from being arranged in a mess, making operation inconvenient, and avoiding danger caused by incorrect wiring.

[0035] Reference Figure 2 , Figure 4 and Figure 5The installation mechanism 4 includes an installation block 401, which is fixedly connected at equal intervals to the rear side of the inner wall of the protective shell 1. A cavity 402 is formed on the inner side of the installation block 401. An insertion rod 403 is slidably connected to the inner wall of the cavity 402. A rotating shaft 404 is rotatably connected to the left side of the inner wall of the insertion rod 403. A transmission assembly 405 is installed on the inner wall of the insertion rod 403. The transmission assembly 405 includes a pull rod 4051, which is slidably connected to the inner wall of the insertion rod 403. Slide grooves 4052 are formed on both the front and rear sides of the outer wall of the pull rod 4051. A slider 406 is installed on the right side of the inner wall of the insertion rod 403, and the slider 406 is slidably connected to the inner wall of the slide groove 4052. During installation, the installation plate 2 must first be tightly fitted. On the inner rear side of the protective shell 1, and ensuring that the mounting plate 2 and the mounting block 401 are on the same plane, the operator then pulls the pull rod 4051. The pull rod 4051 slides on the outer wall of the slider 406. When the pull rod 4051 moves outward, its wider outer wall portion will apply pressure to the rotating shaft 404, causing the rotating shaft 404 to rotate. The rotation of the rotating shaft 404 then drives the insertion rod 403 to slide in the cavity 402 until the insertion rod 403 slides into the groove on the outer wall of the mounting plate 2 and is precisely inserted into it. This design not only ensures the stable connection of the device, but also allows the operator to easily replace parts during maintenance and disassembly, thereby effectively shortening maintenance time and reducing maintenance costs.

[0036] Specifically, the mounting plate 2 is placed tightly against the inner rear wall of the protective shell 1, flush with the mounting block 401. The pull rod 4051 is pulled, and the pull rod 4051 slides on the outer wall of the slider 406. When the pull rod 4051 moves outward, the wider part of the outer wall of the pull rod 4051 presses against the rotating shaft 404. The rotating shaft 404 rotates, causing the insertion rod 403 to slide in the cavity 402, so that the insertion rod 403 slides into the groove on the outer wall of the mounting plate 2 and then inserts into the groove to form a stable connection. The operation is convenient, and it is easy to replace during maintenance and disassembly, shortening maintenance time and reducing maintenance costs.

[0037] Reference Figure 1 , Figure 2 and Figure 3 A relay 7 is fixedly connected to the left end of the front side of the outer wall of the protective shell 1. A microprocessor 8 is provided at the bottom of the relay 7. The microprocessor 8 is fixedly connected to the front side of the outer wall of the protective shell 1. A protective door 9 is rotatably connected to the right side of the front end of the outer wall of the protective shell 1. A handle 10 is fixedly connected to the left side of the front end of the outer wall of the protective door 9.

[0038] Specifically, the protective shell 1 is made of stainless steel and aluminum alloy, and has electromagnetic shielding, dustproof and corrosion-resistant capabilities. It prevents dust, moisture and foreign objects from entering the device and avoids damage to internal circuit components due to moisture, short circuits and other reasons. At the same time, it can also prevent personnel from accidentally touching the internal live parts and ensure personal safety. After receiving the command, the relay 7 drives the circuit breaker trip coil to disconnect the faulty line. The microprocessor 8 is responsible for receiving the sampled data, executing the protection logic algorithm and issuing the trip command. When the device is running normally, the protective door 9 is closed, forming a closed space together with the protective shell 1 to prevent personnel from accidentally touching the internal live parts and play a safety protection role.

[0039] Working principle: By rotating the knob 3053, a series of precise mechanical actions can be achieved. The rotation of the knob 3053 will drive the threaded rod 3051 to rotate in the inner wall of the limit block 3052. The rotation of the threaded rod 3051 is transmitted to the clamping block 303 through its threaded structure, so that the clamping block 303 slides left and right on the slide rail 306 and moves closer to the clamping block 304. This closing action allows the clamping block 303 and the clamping block 304 to fit tightly together, thereby clamping the wire 5. This design allows the device to adapt to wires 5 of different diameters and achieve flexible clamping function. In this way, the wire 5 can be effectively fastened and kept in a neat and orderly state, avoiding the inconvenience caused by the messy arrangement of the wires 5, and greatly reducing the safety risks that may be caused by incorrect wiring.

[0040] During installation, the mounting plate 2 must first be firmly attached to the rear inner wall of the protective shell 1, ensuring that the mounting plate 2 is flush with the mounting block 401. Next, the operator pulls the lever 4051, which slides on the outer wall of the slider 406. When the lever 4051 moves outward, the wider part of its outer wall will squeeze the rotating shaft 404, causing the rotating shaft 404 to rotate. The rotation of the rotating shaft 404 will then drive the insertion rod 403 to slide within the cavity 402, ultimately causing the insertion rod 403 to slide into the groove on the outer wall of the mounting plate 2 and be accurately inserted into it. This design not only ensures a stable connection of the device, but also allows the operator to easily and quickly replace parts during maintenance and disassembly, thereby shortening maintenance time and reducing repair costs.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A line protection device for a thermal power plant, comprising a protective housing (1), characterized in that: An installation plate (2) is installed on the rear side of the inner wall of the protective shell (1). A current transformer (6) is fixedly connected to the front side of the outer wall of the installation plate (2). Wires (5) are installed at the upper and lower ends of the outer wall of the current transformer (6). Fixing mechanisms (3) are installed at equal intervals in the middle of the front side of the outer wall of the installation plate (2). The fixing mechanisms (3) are used to fix and distinguish the lines. Installation mechanisms (4) are installed on the left and right sides of the outer wall of the installation plate (2). The installation mechanisms (4) are used to fix the installation plate (2). The fixing mechanism (3) includes a fixing block (301), which is fixedly connected at equal intervals to the front side of the outer wall of the mounting plate (2). A connecting block (302) is fixedly connected to the front end of the fixing block (301). A slide rail (306) is fixedly connected to the upper middle part of the front side of the outer wall of the connecting block (302). A plurality of clamping blocks (304) are fixedly connected at equal intervals to the outer wall of the slide rail (306). A driving assembly (305) is installed on the front side of the outer wall of the connecting block (302).

2. The power plant line protection device according to claim 1, characterized in that: The drive assembly (305) includes a limiting block (3052), which is fixed to the left and right ends of the front side of the outer wall of the connecting block (302). A threaded rod (3051) is rotatably connected to the inner wall of the limiting block (3052), and a knob (3053) is fixedly connected to the right end of the threaded rod (3051).

3. The power plant line protection device according to claim 1, characterized in that: The outer wall of the slide rail (306) is equidistantly connected with a plurality of clamping blocks (303), and the inner wall of the clamping blocks (303) is threadedly connected to the outer wall of the threaded rod (3051).

4. A line protection device for thermal power plants according to claim 1, characterized in that: The installation mechanism (4) includes an installation block (401), which is fixedly connected at equal intervals to the rear side of the inner wall of the protective shell (1). The inner side of the installation block (401) is provided with a cavity (402), and the inner wall of the cavity (402) is slidably connected with a rod (403). The left side of the inner wall of the rod (403) is rotatably connected with a rotating shaft (404), and the inner wall of the rod (403) is equipped with a transmission component (405).

5. A power plant line protection device according to claim 4, characterized in that: The transmission assembly (405) includes a pull rod (4051), which is slidably connected to the inner wall of the insert rod (403). The pull rod (4051) has grooves (4052) on both the front and rear sides of its outer wall.

6. A power plant line protection device according to claim 4, characterized in that: A slider (406) is installed on the right side of the inner wall of the insertion rod (403), and the slider (406) is slidably connected to the inner wall of the groove (4052).

7. A line protection device for thermal power plants according to claim 1, characterized in that: A relay (7) is fixedly connected to the left end of the front side of the outer wall of the protective shell (1). A microprocessor (8) is provided at the bottom of the relay (7). The microprocessor (8) is fixedly connected to the front side of the outer wall of the protective shell (1).

8. A line protection device for thermal power plants according to claim 1, characterized in that: The protective shell (1) is rotatably connected to the right side of the outer front end of the outer wall of the protective shell (1), and a handle (10) is fixedly connected to the left side of the outer front end of the protective door (9).

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