A current overload protection device for distribution network lines

Abstract

The present invention relates to the technical field of current overload protection, and in particular to a current overload protection device for distribution network lines, comprising a shell, a signal cut-off mechanism, an adapter plate and a controller; the shell is provided with a plurality of input interfaces and output interfaces; the signal cut-off mechanism comprises a wiring seat, a mounting frame, a pneumatic rod and a connecting plate, the action end of the pneumatic rod is connected to the connecting plate, a primary transmission wire is provided in the input interface, the primary transmission wire is connected to the connecting plate, a first interface is provided on the wiring seat, the primary transmission wire is detachably connected to the first interface; the adapter plate is fixedly connected to the wiring seat, the adapter plate is electrically connected to the output interface, and a temperature sensor is provided on the adapter plate; the temperature sensor and the pneumatic rod are electrically connected to the controller respectively; the present invention is used to solve the problem that the existing adapter device is prone to danger due to overload. The present invention can effectively monitor whether an overload phenomenon occurs in the adapter device, stop the signal transmission work in time, avoid damage to the adapter device, and improve the safety of use.

Description

Technical Field

[0001] The present invention relates to the technical field of current overload protection, and in particular to a current overload protection device for distribution network lines. Background Art

[0002] During the transmission of network signals, a switching device is required between the signal transmitting terminal and the receiving device to ensure the stability of the signal frequency and the accuracy of signal transmission. However, when the existing switching device is in use, the power supply voltage inside the switching device becomes disordered due to the long-term power-on operation of the switching device, which can easily cause the internal current to exceed the rated power of the processing component and cause an overload. The existing switching device is unable to determine whether an overload has occurred internally and still performs signal transmission, causing the internal temperature of the switching device to continue to rise, damaging the switching device and even causing a danger to use. Summary of the Invention

[0003] In order to overcome the defects in the above-mentioned prior art, the present invention provides a current overload protection device for distribution network lines, which can effectively monitor whether overload occurs in the adapter and stop signal transmission in time to avoid damage to the adapter and improve the safety of the adapter.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a current overload protection device for distribution network lines, comprising a housing, a signal cut-off mechanism, a switching board and a controller;

[0005] The housing is provided with a plurality of input interfaces and a plurality of output interfaces;

[0006] The signal cutting mechanism includes a wiring seat, a mounting bracket, a pneumatic rod and a connecting plate, the wiring seat is fixedly connected to the inner bottom surface of the shell, the mounting bracket is fixed to the wiring seat, the pneumatic rod is fixed to the mounting bracket, the action end of the pneumatic rod is connected to the connecting plate, the connecting plate is arranged between the wiring seat and the input interface, a primary transmission wire is provided in the input interface, the primary transmission wire is fixedly connected to the connecting plate, a plurality of first interfaces are provided on the wiring seat, and the free ends of the primary transmission wires are detachably connected to the first interfaces;

[0007] The adapter board is arranged in the housing, one end of the adapter board is fixedly connected to the wiring seat, the other end of the adapter board is electrically connected to the output interface, and a temperature sensor is provided on the adapter board;

[0008] The controller is installed in the housing, and the temperature sensor and the pneumatic rod are electrically connected to the controller respectively.

[0009] Furthermore, the shell includes a lower assembly shell and an upper assembly shell that can be detachably snapped together. A first connecting plate is provided in the lower assembly shell, and a second connecting plate is provided in the upper assembly shell. The first connecting plate and the second connecting plate are respectively provided with corresponding grooves, and several of the input interfaces are respectively embedded in the grooves.

[0010] Furthermore, the shell of the input interface is a cylindrical structure, and the groove is semicircular.

[0011] Furthermore, the end portion of the lower assembly shell for mounting the first connecting plate and the end portion of the upper assembly shell for mounting the second connecting plate are respectively provided with protective edges.

[0012] Furthermore, the output interface is arranged on the lower assembly shell, a secondary transmission wire is provided in the output interface, a base is provided in the lower assembly shell, the base is arranged between the adapter plate and the output interface, and a plurality of second interfaces are provided on the base, and the free ends of the adapter plate and the secondary transmission wire are electrically connected to the second interfaces respectively.

[0013] Furthermore, the mounting frame is an L-shaped frame.

[0014] Furthermore, a heat dissipation structure is provided on the housing.

[0015] Furthermore, the heat dissipation structure includes a hollow cover, a connecting frame, a motor, a transmission rod and a fan. A reserved opening is provided on the upper assembly shell, the hollow cover is connected to the reserved opening, the connecting frame is fixed in the hollow cover, the motor is fixed on the connecting frame, the transmission rod is connected to the output shaft of the motor, the fan is fixed on the transmission rod, a number of heat dissipation holes are provided on the hollow cover, and the motor is electrically connected to the controller.

[0016] Furthermore, the connecting frame includes an outer connecting ring, an inner connecting ring and a plurality of reinforcing rods, the outer connecting ring is fixedly connected to the hollow cover, the inner connecting ring is fixedly connected to the motor, and the plurality of reinforcing rods are connected between the outer connecting ring and the inner connecting ring.

[0017] Furthermore, a limiting sleeve for limiting the swing of the transmission rod is provided on the inner connecting ring.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention provides a current overload protection device for a distribution network line, comprising a shell, a signal cutting mechanism, an adapter plate and a controller; the shell is provided with a plurality of input interfaces and a plurality of output interfaces; the signal cutting mechanism comprises a wiring seat, a mounting bracket, a pneumatic rod and a connecting plate, the wiring seat is fixedly connected to the inner bottom surface of the shell, the mounting bracket is fixed to the wiring seat, the pneumatic rod is fixed to the mounting bracket, the action end of the pneumatic rod is connected to the connecting plate, the connecting plate is arranged between the wiring seat and the input interface, a primary transmission wire is provided in the input interface, the primary transmission wire is fixedly connected to the connecting plate, a plurality of first interfaces are provided on the wiring seat, and the free end of the primary transmission wire is detachably plugged into the first interface; the adapter plate is arranged in the shell, one end of the adapter plate is fixedly connected to the wiring seat, the other end of the adapter plate is electrically connected to the output interface, and a temperature sensor is provided on the adapter plate; the controller is installed in the shell, and the temperature sensor and the pneumatic rod are electrically connected to the controller respectively;

[0020] The present invention sets a temperature sensor on the adapter plate. When the current is overloaded, the temperature on the adapter plate increases due to the increased workmanship on the adapter plate. The temperature sensor transmits a signal to the controller by detecting the temperature change to determine whether an overload occurs. If an overload occurs, the controller starts the pneumatic rod, and the pneumatic rod withdraws the connecting plate from the wiring seat, so that the primary transmission wire is pulled out of the first interface, cutting off the signal transmission between the primary transmission wire and the adapter plate, causing the device to stop working and achieving the purpose of quickly cutting off the signal transmission. The present invention can detect whether the adapter plate is in an overload state and cut off the signal transmission in time to avoid the continuous increase of the operating load of the adapter plate, which causes the temperature of the adapter plate to exceed the range that the material can bear, and the device is damaged or even spontaneously combusts. The present invention can effectively protect the device, effectively improve the safety of use, and reduce the probability of fire. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Attachment Figure 1 A schematic structural diagram of the overall device of the present invention from one perspective;

[0022] Attachment Figure 2 A schematic structural diagram of the entire device of the present invention from another perspective;

[0023] Attachment Figure 3 This is a structural schematic diagram of the device of the present invention from a perspective without the upper assembly housing;

[0024] Attachment Figure 4 This is a structural schematic diagram of the device of the present invention from another perspective with the upper assembly housing removed;

[0025] Attachment Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0026] Attachment Figure 6 Schematic diagram of the heat dissipation structure of the present invention;

[0027] Attachment Figure 7 This is a schematic structural diagram of the upper assembly housing in the present invention;

[0028] Attachment Figure 8 for Figure 7 Enlarged view of point B in the middle.

[0029] Figure markings: 1-lower assembly shell; 2-upper assembly shell; 3-adapter plate; 4-input interface; 5-output interface; 6-wiring base; 7-mounting frame; 8-pneumatic rod; 9-connection plate; 10-first interface; 11-primary transmission wire; 12-secondary transmission wire; 13-temperature sensor; 14-first connecting plate; 15-second connecting plate; 16-groove; 17-protective edge; 18-protective edge; 19-base; 20-second interface; 21-hollow cover; 22-motor; 23-transmission rod; 24-fan; 25-heat dissipation hole; 26-inner connecting ring; 27-outer connecting ring; 28-reinforcement rod. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The present invention is described in one of the embodiments below in combination with the specific implementation methods. Among them, the drawings are only for illustrative purposes and represent only schematic diagrams rather than physical drawings, and cannot be understood as limitations on this patent; in order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0031] Example

[0032] like Figure 1-4As shown, this embodiment provides a current overload protection device for distribution network lines, including a shell, a signal cut-off mechanism, an adapter plate 3 and a controller; a plurality of input interfaces 4 and a plurality of output interfaces 5 are provided on the shell; the signal cut-off mechanism includes a wiring seat 6, a mounting frame 7, a pneumatic rod 8 and a connecting plate 9, the wiring seat 6 is fixedly connected to the inner bottom surface of the shell, the mounting frame 7 is fixed on the wiring seat 6, the pneumatic rod 8 is fixed on the mounting frame 7, the action end of the pneumatic rod 8 is connected to the connecting plate 9, the connecting plate 9 is arranged between the wiring seat 6 and the input interface 4, a primary transmission wire 11 is provided in the input interface 4, the primary transmission wire 11 is fixedly connected to the connecting plate 9, the wiring seat 6 is provided with a plurality of first interfaces 10, and the free end of the primary transmission wire 11 is detachably connected to the first interface 10; the adapter plate 3 is arranged in the shell, one end of the adapter plate 3 is fixedly connected to the wiring seat 6, the other end of the adapter plate 3 is electrically connected to the output interface 5, and a temperature sensor 13 is provided on the adapter plate 3; the controller is installed in the shell, and the temperature sensor 13 and the pneumatic rod 8 are electrically connected to the controller respectively.

[0033] It should be noted that, in this embodiment, the input interface 4 and the output interface 5 are used to transmit signals respectively, and the signal transmission path passes through the input interface 4, the primary transmission wire 11, the adapter plate 3 and the output interface 5 in sequence, wherein a metal pin is provided inside the first interface 10 of the wiring seat 6. When the primary transmission wire 11 is plugged into the first interface 10, the contact jack in the primary transmission wire 11 is wrapped around the surface of the metal pin to connect the line. In this embodiment, the number of input interfaces 4 and output interfaces 5 is the same; the signal cutting mechanism is mainly used to cut off the signal transmission between the primary transmission wire 11 and the adapter plate 3. In this device, an installation distance is left between the wiring seat 6 and the input interface 4, the wiring seat 6 is fixedly connected to the adapter plate 3, and the connecting plate 9 is arranged within the installation distance between the wiring seat 6 and the input interface 4. The pneumatic rod 8 can drive the connecting plate 9 to move within the installation distance, and the primary transmission wire 11 and the adapter plate 3 are normally connected. When signal transmission is performed, the pneumatic rod 8 drives the connecting plate 9 close to the wiring seat 6, so that the free end of the primary transmission wire 11 fixed on the connecting plate 9 is inserted into the first interface 10 of the wiring seat 6, and when the pneumatic rod 8 pushes the connecting plate 9 away from the wiring seat 6, the free end of the primary transmission wire 11 is pulled out from the first interface 10, thereby cutting off the signal transmission between the primary transmission wire 11 and the adapter plate 3; the temperature sensor 13 is used to sense the temperature change on the adapter plate 3 and transmit the temperature signal to the controller, and when the temperature signal transmitted by the temperature sensor 13 is higher than the set temperature monitoring value, the controller will control the pneumatic rod 8 to move, pull out the primary transmission wire 11 from the first interface 10, cut off the signal transmission, and thus stop the device from working, avoiding the device from always working in an overload current overload state, causing the internal overheating of the device. Among them, the adapter plate 3 in this embodiment mainly uses a PCB adapter plate 3.

[0034] The present invention monitors the temperature changes of the adapter board 3 through the temperature sensor 13 to determine whether the current is overloaded, and cooperates with the signal cutting mechanism to cut off the signal transmission path in the device, so that the device stops working, avoids the device being in a continuous working state, aggravates the current overload, causes overheating inside the device, and ultimately causes the temperature inside the PCB adapter board 3 to exceed the range that the material can withstand, causing the device to spontaneously combust. The present invention can monitor whether the device is overloaded and can block signal transmission, reduce overheating inside the device, reduce the probability of fire, and improve safety in use.

[0035] Furthermore, if Figure 3 and Figure 7 As shown, to facilitate disassembly and assembly of the device, as well as inspection and maintenance, the housing includes a lower assembly shell 1 and an upper assembly shell 2 that can be detachably fastened. A first connecting plate 14 is provided in the lower assembly shell 1, and a second connecting plate 15 is provided in the upper assembly shell 2. The first connecting plate 14 and the second connecting plate 15 are respectively provided with corresponding grooves 16, and a plurality of input interfaces 4 are respectively embedded in the grooves 16.

[0036] It should be noted that, in this embodiment, the grooves 16 on the first connecting plate 14 and the second connecting plate 15 are used to clamp the input interface 4, the lower assembly shell 1 is clamped to the input interface 4 through the grooves 16 on the first connecting plate 14, and the upper assembly shell 2 is clamped to the input interface 4 through the second connecting plate 15, so that the upper assembly shell 2, the lower assembly shell 1 and the input interface 4 are clamped, the structure is simple, the connection is convenient, and the space formed by the grooves 16 on the first connecting plate 14 and the second connecting plate 15 can position each input interface 4, which is convenient for wiring; at the same time, other connecting structures can be used to assist the connection between the upper assembly shell 2 and the lower assembly shell 1, such as mutually cooperating concave and convex bayonet structures.

[0037] Furthermore, if Figure 3 and Figure 7 As shown, in this embodiment, the housing of the input interface 4 is preferably designed as a cylindrical structure, and the groove 16 is designed as a semicircular structure. In this embodiment, the output interface 5 is preferably designed as a square structure.

[0038] It should be noted that the input interface 4 and the output interface 5 are designed as different types of interfaces, which are convenient for connecting different connector wires. At the same time, the input interface 4 is designed as a cylindrical structure, which is beneficial to improving the connection stability between the upper assembly shell 2 and the lower assembly shell 1.

[0039] Furthermore, if Figure 1 As shown, in order to protect the input interface 4, the end of the lower assembly shell 1 for mounting the first connecting plate 14 and the end of the upper assembly shell 2 for mounting the second connecting plate 15 are respectively provided with protective edges 17. In order to protect the output interface 5, a protective edge 18 is designed on the output interface 5.

[0040] It should be noted that, in this embodiment, when the first connecting plate 14 is installed on the lower assembly shell 1, a distance is left between the first connecting plate 14 and the edge of the lower assembly shell 1. Similarly, when the second connecting plate 15 is installed on the upper assembly shell 2, a distance is left between the second connecting plate 15 and the edge of the upper assembly shell 2 so that the first connecting plate 14 and the second connecting plate 15 correspond to each other. The reserved distance allows the lower assembly shell 1 and the upper assembly shell 2 to protrude a portion respectively, forming a protective edge 17 structure for protecting the input interface 4 and preventing the input interface 4 from being damaged. At the same time, when the external wire is connected to the input interface 4, the protective edge 17 can receive a portion of the external wire to improve the connection stability between the external wire and the input interface 4; in this embodiment, the protective edge 18 on the output interface 5 is directly designed as a protective cover at the output interface 5 to cover the output interface 5 and protect the output interface 5, and when the external wire is connected to the output interface 5, the protective cover can receive a portion of the external wire to improve the connection stability.

[0041] Furthermore, in order to rationally arrange the internal structure of the device, such as Figure 3 and Figure 4 As shown, the output interface 5 is arranged on the lower assembly shell 1, and a secondary transmission wire 12 is provided in the output interface 5. A base 19 is provided in the lower assembly shell 1, and the base 19 is arranged between the adapter plate 3 and the output interface 5. A plurality of second interfaces 20 are provided on the base 19, and the free ends of the adapter plate 3 and the secondary transmission wire 12 are electrically connected to the second interfaces 20 respectively.

[0042] It should be noted that the base 19 is used to connect the secondary transmission wire 12 with the adapter plate 3. The second interface 20 designed on the base 19 is conducive to sorting and positioning the secondary transmission wire 12, avoiding the clutter of the secondary transmission wire 12, and improving the connection stability between the secondary transmission wire 12 and the adapter plate 3; a number of metal contacts are provided in the second interface 20, and the adapter plate 3 is connected to the metal contacts.

[0043] Furthermore, if Figure 3 and Figure 4 As shown, in order to facilitate the installation of the pneumatic rod 8, the mounting frame 7 is an L-shaped frame.

[0044] It should be noted that one end of the L-shaped horizontal plate of the mounting frame 7 is installed on the wiring seat 6, the pneumatic rod 8 is installed on one end of the L-shaped vertical plate, one end of the L-shaped vertical plate of the mounting frame 7 is parallel to the wiring seat 6, and one end of the L-shaped horizontal plate is installed perpendicular to the wiring seat 6. Among them, setting the mounting frame 7 to be L-shaped is conducive to the installation of the pneumatic rod 8, and makes it easier for the pneumatic rod 8 to push the connecting plate 9, thereby improving the structural compactness of the device.

[0045] Furthermore, in order to facilitate the fixing of the primary transmission wire 11 to the connecting plate 9, as shown in FIG. Figure 5As shown, a through hole is provided on the connecting plate 9 , and the primary transmission wire 11 is fixed in the through hole. The free end of the primary transmission wire 11 extends from the through hole and is plugged into the first interface 10 .

[0046] Furthermore, if Figure 1 As shown, a heat dissipation structure is provided on the shell.

[0047] It should be noted that the heat dissipation structure is used to reduce the internal temperature of the device, wherein a plurality of heat dissipation holes 25 can be provided on the housing.

[0048] Furthermore, if Figure 6 As shown, the heat dissipation structure in this embodiment includes a hollow cover 21, a connecting frame, a motor 22, a transmission rod 23 and a fan 24. A reserved opening is provided on the upper assembly shell 2, the hollow cover 21 is connected to the reserved opening, the connecting frame is fixed in the hollow cover 21, the motor 22 is fixed on the connecting frame, the transmission rod 23 is connected to the output shaft of the motor 22, the fan 24 is fixed on the transmission rod 23, a plurality of heat dissipation holes 25 are provided on the hollow cover 21, and the motor 22 is electrically connected to the controller.

[0049] It should be noted that, in this embodiment, Figure 7 As shown, the heat dissipation structure is installed on the upper assembly shell 2, the hollow cover 21 is used to reserve installation space, the connecting frame is used to improve the installation stability between the motor 22 and the fan 24, the transmission rod 23 is used to adjust the installation distance between the motor 22 and the fan 24, the fan 24 is used to accelerate the flow of gas, and the heat dissipation holes 25 are used for gas exchange. The internal space of the device is small and heat is easily accumulated during operation. The controller is used to control the start of the motor 22, and the motor 22 drives the fan 24 to rotate. The fan 24 accelerates the flow of gas, so that the heat inside the device is exchanged with the outside world, thereby reducing the temperature inside the device and further ensuring the stability of signal transmission. In order to ensure uniform heat dissipation, the heat dissipation holes 25 in this embodiment are the same size.

[0050] Furthermore, in order to improve the installation stability of the motor 22, as Figure 6 As shown, the connecting frame includes an outer connecting ring 27, an inner connecting ring 26 and a plurality of reinforcing rods 28. The outer connecting ring 27 is fixedly connected to the hollow cover 21, the inner connecting ring 26 is fixedly connected to the motor 22, and the plurality of reinforcing rods 28 are connected between the outer connecting ring 27 and the inner connecting ring 26.

[0051] It should be noted that, in this embodiment, the inner connecting ring 26 and the outer connecting ring 27 are arranged in concentric circles, wherein the reinforcing rods 28 are evenly distributed between the inner connecting ring 26 and the outer connecting ring 27, and the reinforcing rods 28 are distributed along the radius direction of the concentric circles to improve the structural strength of the connecting frame. The inner connecting ring 26 is sleeved on the outer wall of the motor 22 shell, and the outer connecting ring 27 is fixed to the inner wall of the hollow cover 21. The motor 22 is lifted so that the output shaft of the motor 22 faces the side of the lower assembly shell 1, and then the transmission rod 23 is connected to the output shaft of the motor 22, and the position of the fan 24 on the transmission rod 23 is adjusted so that the motor 22 can drive the fan 24 to rotate.

[0052] Furthermore, in order to prevent the transmission rod 23 from swinging left and right and causing the fan 24 to shake, as shown in FIG. Figure 8 As shown, a limiting sleeve is provided on the inner connecting ring 26 for limiting the swing of the transmission rod 23 .

[0053] It should be noted that a vertical limiting sleeve is provided on the inner connecting ring 26, and the transmission rod 23 is provided in the limiting sleeve. Preferably, a bearing is installed between the limiting sleeve and the transmission rod 23 to further improve the rotation stability. Since the limiting sleeve is fixed to the inner connecting ring 26, the swing of the transmission rod 23 is reduced, thereby preventing the fan 24 from shaking.

[0054] Working principle:

[0055] Install the device in the designated work area, connect external wires to the input interface 4 and output interface 5, respectively, to complete the circuit. The information input to each input interface 4 is transmitted to the PCB adapter board 3 by each primary transmission wire 11. After the PCB adapter board 3 processes and distributes the signals, it is concentrated at the base 19. The secondary transmission wire 12 guides each signal beam into the output interface 5.

[0056] When the device is working, the heat generated inside the PCB adapter board 3 will continue to diffuse in the shell. The controller starts the motor 22, and the motor 22 drives the fan 24 to rotate at high speed in the hollow cover 21, exchanging the heat in the shell with the outside world to cool the device. When the current input into the device exceeds the original value, that is, when an overload occurs, the energy loss generated in the PCB adapter board 3 increases, and the heat generated inside the PCB adapter board 3 increases accordingly. When the temperature sensor 13 captures a temperature higher than the set value, the temperature sensor 13 transmits a signal to the controller, and the controller starts the pneumatic rod 8. The pneumatic rod 8 pushes the connecting plate 9, and the connecting plate 9 moves away from the wiring seat 6, pulling out the primary transmission wire 11 plugged in the first interface 10, cutting off the signal transmission between the primary transmission wire 11 and the PCB adapter board 3.

[0057] In the description of the present invention, it should be understood that if the terms "upper," "lower," "left," "right," etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the purpose of facilitating the description of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, the terms describing the positional relationship in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meanings of the above terms can be understood based on the specific circumstances. In addition, if there are descriptions of "first," "second," etc. in the embodiments of the present invention, the descriptions of "first," "second," etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the definition of "first" or "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or solutions that meet both A and B.

[0058] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention, or direct / indirect applications in other related technical fields should be included in the scope of protection of the claims of the present invention.

Claims

1. A current overload protection device for distribution network lines, characterized in that: It includes a housing, a signal cut-off mechanism, an adapter plate and a controller; The housing is provided with a plurality of input interfaces and a plurality of output interfaces; The signal cutting mechanism includes a wiring seat, a mounting bracket, a pneumatic rod and a connecting plate, the wiring seat is fixedly connected to the inner bottom surface of the shell, the mounting bracket is fixed to the wiring seat, the pneumatic rod is fixed to the mounting bracket, the action end of the pneumatic rod is connected to the connecting plate, the connecting plate is arranged between the wiring seat and the input interface, a primary transmission wire is provided in the input interface, the primary transmission wire is fixedly connected to the connecting plate, a plurality of first interfaces are provided on the wiring seat, and the free ends of the primary transmission wires are detachably connected to the first interfaces; The adapter plate is arranged in the housing, one end of the adapter plate is fixedly connected to the wiring seat, the other end of the adapter plate is electrically connected to the output interface, and a temperature sensor is provided on the adapter plate; The controller is installed in the housing, and the temperature sensor and the pneumatic rod are electrically connected to the controller respectively; The housing comprises a lower assembly shell and an upper assembly shell that are detachably fastened together. A first connecting plate is provided in the lower assembly shell, and a second connecting plate is provided in the upper assembly shell. The first connecting plate and the second connecting plate are respectively provided with corresponding grooves, and the plurality of input interfaces are respectively embedded in the grooves. The housing of the input interface is a cylindrical structure, and the groove is semicircular; The end of the lower assembly shell for mounting the first connecting plate and the end of the upper assembly shell for mounting the second connecting plate are respectively provided with protective edges; The end of the lower assembly shell for mounting the first connecting plate and the end of the upper assembly shell for mounting the second connecting plate are respectively provided with protective edges; The output interface is arranged on the lower assembly shell, a secondary transmission wire is provided in the output interface, a base is provided in the lower assembly shell, the base is arranged between the adapter plate and the output interface, a plurality of second interfaces are provided on the base, and the free ends of the adapter plate and the secondary transmission wire are electrically connected to the second interfaces respectively.

2. A current overload protection device for distribution network lines according to claim 1, characterized in that: The mounting frame is an L-shaped frame.

3. A current overload protection device for distribution network lines according to any one of claims 1-2, characterized in that: The shell is provided with a heat dissipation structure.

4. A current overload protection device for distribution network lines according to claim 3, characterized in that: The heat dissipation structure includes a hollow cover, a connecting frame, a motor, a transmission rod and a fan. A reserved opening is provided on the upper assembly shell, the hollow cover is connected to the reserved opening, the connecting frame is fixed in the hollow cover, the motor is fixed on the connecting frame, the transmission rod is connected to the output shaft of the motor, the fan is fixed on the transmission rod, a plurality of heat dissipation holes are provided on the hollow cover, and the motor is electrically connected to the controller.

5. A current overload protection device for distribution network lines according to claim 4, characterized in that: The connecting frame includes an outer connecting ring, an inner connecting ring and a plurality of reinforcing rods. The outer connecting ring is fixedly connected to the hollow cover, the inner connecting ring is fixedly connected to the motor, and the plurality of reinforcing rods are connected between the outer connecting ring and the inner connecting ring.

6. A current overload protection device for distribution network lines according to claim 5, characterized in that: The inner connecting ring is provided with a limiting sleeve for limiting the swing of the transmission rod.

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