Temperature monitoring device of bus lap joint structure

Abstract

The utility model relates to the technical field of monitoring of bus lap joint structures, in particular to a temperature monitoring device of a bus lap joint structure, which comprises a monitoring module, a master control switch, an antenna and a plurality of thermistors are respectively connected onto the monitoring module, and silica gel layers are respectively coated on temperature sensing ends of the thermistors. The plurality of thermistors are respectively provided with a clamping mechanism; the clamping mechanism comprises a fixing pipe arranged on the side, away from the silica gel layer, of the thermistor, a fixing plate arranged on the fixing pipe in a sleeving mode, a supporting plate arranged on the other side of the thermistor, a supporting rod arranged on the supporting plate, a first spring and a first nut, wherein the supporting rod is sleeved with the first spring and the first nut. The utility model provides a temperature monitoring device for a bus lap joint structure, which is convenient for respectively monitoring the temperature of the connection part of a plurality of sub-wires and a bus extension socket, and is helpful for finding out the reason for the overhigh temperature of the bus lap joint structure.

Description

Technical Field

[0001] The utility model relates to the technical field of monitoring of busbar connection structures, and particularly relates to a temperature monitoring device for a busbar connection structure. Background Art

[0002] A busbar is a conductor component used in a complete switchgear to connect various electrical equipment and collect, distribute, and transmit electric energy. A sub-line is a conductor component that branches out from the busbar to transmit electric power. By connecting the sub-line to a specific device or load, electric power can be delivered to the specific device or load, realizing the distribution of current. The busbar connection structure is a structure in the switchgear that involves the connection of the busbar and the sub-line, thereby dispersing the electric power on the busbar to the sub-line to meet the requirements of power and current distribution for each component in the power system, improving the stability and safety of electrical connections, and also facilitating the maintenance of equipment. Therefore, the quality of the busbar connection structure directly affects the overall quality of the switchgear. For this reason, the quality of the busbar connection structure directly affects the quality of the switchgear product. The probability of the busbar connection structure in the switchgear is relatively small, but once a failure occurs, it will cause a large-scale power outage, seriously affecting the stability of the power supply system. This is one of the most serious types of failures in electrical equipment.

[0003] The busbar connection structure includes a busbar socket connected to the busbar body, a plurality of series connection holes corresponding to each other in position are arranged side by side at the end parts of the busbar socket, and the sub-line is connected to the series connection holes. When problems such as a large power and current distribution of components, a short-circuit accident in the switchgear and control equipment in the switchgear, and poor contact between the busbar socket and the sub-line occur, the temperature of the busbar connection structure will rise rapidly. In particular, the temperature at the connection between the busbar socket and the sub-line will rise sharply, ultimately leading to the aging of the insulating material and causing a short-circuit accident. Therefore, a temperature sensor is installed on the busbar connection structure to monitor the temperature of the line connection structure in real time to avoid accidents. However, simply installing a temperature sensor on the busbar connection structure cannot comprehensively monitor the temperature change of the busbar connection structure, and it is difficult to detect the temperature at the connection between multiple sub-lines and the busbar socket. Therefore, it is difficult to timely discover problems such as a large power and current distribution of components, a short-circuit in the switchgear and control equipment in the switchgear, and poor contact between the busbar socket and the sub-line, and it is even more impossible to find out the reason for the increase in the temperature of the busbar connection structure. Therefore, there are improvements in the temperature monitoring of the busbar connection structure, which is convenient for monitoring the temperatures at the connections between multiple sub-lines and the busbar socket respectively, and also helps to find out the reason for the excessive temperature of the busbar connection structure, so as to improve the quality of the complete switchgear. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the utility model provides a temperature monitoring device for a busbar lap joint structure, which is convenient for respectively monitoring the temperatures at the plug connection points of multiple sub-lines and the busbar, and helps to find out the reasons for the excessive temperature of the busbar lap joint structure, so as to overcome the defects in the prior art.

[0005] The technical solution adopted by the utility model is as follows: a temperature monitoring device for a busbar lap joint structure, including a monitoring module, a main control switch, an antenna and a plurality of thermistors are respectively connected to the monitoring module, silicone layers are respectively coated on the temperature sensing ends of the plurality of thermistors, and clamping mechanisms are respectively arranged on the plurality of thermistors; the clamping mechanism includes a fixed tube arranged on the side of the thermistor away from the silicone layer, a fixing plate is sleeved on the fixed tube, a support plate is arranged on the other side of the thermistor, a support rod is arranged on the support plate, and a first spring and a first nut are respectively sleeved on the support rod, a sleeve hole is formed in the fixing plate, the sleeve hole is movably sleeved on the support rod, one end of the support rod is installed on the support plate, the other end of the support rod is threadedly sleeved in the first nut, and the two ends of the first spring are respectively in contact with the first nut and the fixing plate.

[0006] Preferably, the thermistor is installed at one end of the fixed tube, a through hole is formed in the fixing plate, the fixed tube is movably sleeved in the through hole, a second nut is threadedly sleeved at the end of the fixed tube away from the thermistor, a second spring is arranged between the second nut and the fixing plate, the second spring is movably sleeved on the fixed tube, the two ends of the second spring are respectively in contact with the second nut and the fixing plate, and a fixing ring is arranged between the fixing plate and the thermistor, the fixing ring is fixedly sleeved on the fixed tube, and the outer diameter of the fixing ring is not less than the aperture of the through hole.

[0007] Preferably, the resistance value of the thermistor increases with the increase of temperature, a relay is arranged on one side of the thermistor, and the thermistor is connected to the monitoring module through the coil of the relay.

[0008] Preferably, a normally closed push button switch and a normally open push button switch are arranged between the thermistor and the monitoring module, a second normally open switch of the relay is arranged in parallel on one side of the normally open push button switch, the normally closed push button switch is connected to the monitoring module through the normally open push button switch or the second normally open switch of the relay, and the thermistor and the coil of the relay are connected through the normally closed push button switch and the normally open push button switch or the second normally open switch of the relay.

[0009] Preferably, a warning lamp and a normally closed switch of the relay are arranged on one side of the monitoring module, and the warning lamp is connected to the monitoring module through the normally closed switch of the relay.

[0010] Preferably, a box body is provided on the monitoring module. The monitoring module, the master control switch, and the antenna are respectively installed inside the box body. The warning light, the normally closed push-button switch, and the normally open push-button switch are respectively inlaid on the box body. A plurality of through holes are respectively opened at the top end and the bottom end of the box body. A protective sleeve made of an elastic material is fixedly sleeved in the through hole. The monitoring module is connected to the thermistor or the relay through a wire, and the wire is press-fitted in the protective sleeve.

[0011] Preferably, a fuse is provided between the monitoring module and the master control switch, and the master control switch is connected to the monitoring module through the fuse.

[0012] The beneficial effects of the present utility model are as follows: First, several thermistors provided in the present utility model are respectively placed at the connection points of multiple sub-wires and busbar sockets. Since the temperature change at the connection points of multiple sub-wires and busbar sockets will cause the resistance value of the thermistor to change, thereby changing the current in the circuit where the thermistor is located, so that the monitoring module can monitor the change of the thermistor current, thereby facilitating the separate monitoring of the temperatures at the connection points of multiple sub-wires and busbar sockets. By using the provided antenna, the temperature information of the monitoring busbar connection structure can be transmitted outward, so as to meet the requirement of real-time monitoring, and then the reason for the over-high temperature of the busbar connection structure can be found out according to the temperature information. By providing the master control switch, the start and stop of the power supply to the monitoring module can be controlled. Moreover, in the present utility model, through the provided silica gel layer, the heat of the busbar connection is conveniently transferred to the thermistor, and the busbar connection and the thermistor are insulated to prevent the current in the circuit where the busbar connection is located from being transmitted to the thermistor. By providing the fixing plate, the support plate, the support rod, the first spring, and the first nut, the busbar socket of the busbar connection structure is clamped between the fixing plate and the support plate, so as to conveniently install the thermistor on the busbar socket of the busbar connection structure, which is convenient for loading and unloading the thermistor.

[0013] Second, in the present utility model, through the provided second nut, second spring, and fixing ring, the silica gel layer can be conveniently attached to the connection point of the busbar socket and the sub-wire of the busbar connection structure, so as to facilitate the transfer of the temperature at the connection point of the busbar socket and the sub-wire of the busbar connection structure to the thermistor. Moreover, in the present utility model, through the provided relay, if the temperature at the connection point of the busbar socket and the sub-wire is too high, the resistance value of the thermistor will become larger, resulting in the coil end of the relay being unable to adsorb the first normally open switch of the relay, and the first normally open switch of the relay will be disconnected to avoid accidents.

[0014] Again, the utility model is provided with a normally closed push-button switch, a normally open push-button switch, and a second normally open switch of a relay to conveniently control the disconnection or energization of the circuit where the thermistor is located. By setting a warning lamp and a normally closed switch of the relay, when the circuit where the coil of the relay is located is in an open state, the warning lamp is energized and emits light, so as to facilitate maintenance personnel to understand the power supply situation of the circuit where the coil of the relay is located. Moreover, the utility model is provided with a box body to protect the monitoring module and the main control switch, facilitate the operation of the normally closed push-button switch and the normally open push-button switch, and facilitate the observation of the warning lamp. By setting a protective sleeve, it is convenient to protect the wire connecting the thermistor and the relay.

[0015] In addition, the utility model is provided with a fuse to prevent the current provided by the power supply circuit of the monitoring module from exceeding the specified value, thereby realizing overcurrent protection for the power supply circuit of the monitoring module. Brief Description of the Drawings

[0016] Figure 1 is the first three-dimensional schematic diagram of the utility model.

[0017] Figure 2 is the second three-dimensional schematic diagram of the utility model.

[0018] Figure 3 is the circuit schematic diagram of the utility model.

[0019] Figure 4 is the connection circuit diagram of the first normally open switch of the relay and the busbar connection structure in the utility model.

[0020] Figure 5 is the installation exploded view of the thermistor, the fixing plate, and the support plate in the utility model.

[0021] Figure 6 is the assembly schematic diagram of the utility model and the busbar connection structure.

[0022] Figure 7 is the installation schematic diagram of the utility model installed in the switch cabinet. Detailed Description of the Preferred Embodiment

[0023] Such as Figures 1 to 7As shown in the figure, a temperature monitoring device for a busbar connection structure includes a monitoring module 1. A main control switch 2, an antenna 3, and several thermistors 4 are respectively connected to the monitoring module 1. Silicone layers 5 are respectively coated on the temperature sensing ends of the several thermistors 4. The busbar connection structure includes a busbar insert and sub-lines installed on the busbar insert. The monitoring module 1 uses any one of a single-chip microcomputer, a DSP, and an ARM as a control chip. A corresponding control program is set in the monitoring module 1. The monitoring module 1 is connected to a power supply through the main control switch 2, so as to control the start and stop of the power supply of the monitoring module 1 through the main control switch 2. The monitoring module 1 transmits information outward through the antenna 3 to monitor the temperature of the busbar connection structure in real time. The several thermistors 4 are used to monitor the temperatures at the connections between multiple sub-lines and the busbar insert respectively. As the temperature at the connections between multiple sub-lines and the busbar insert changes, the resistance values of the thermistors 4 will also change, thereby changing the current in the circuit where the thermistors 4 are located. By monitoring the change in the current of the thermistors 4 by the monitoring module 1, the temperature change of the busbar connection structure can be judged. The silicone layers 5 are used to transfer the heat of the busbar connection to the thermistors 4 and insulate the busbar connection and the thermistors 4 to prevent the current in the circuit where the busbar connection is located from being transmitted to the thermistors 4. Clamping mechanisms are respectively arranged on the several thermistors 4. The clamping mechanism includes a fixed tube 6 arranged on the side of the thermistor 4 away from the silicone layer 5, a fixing plate 7 sleeved on the fixed tube 6, a support plate 8 arranged on the other side of the thermistor 4, a support rod 9 arranged on the support plate 8, and a first spring 10 and a first nut 11 respectively sleeved on the support rod 9. A sleeve hole 12 is formed in the fixing plate 7, and the sleeve hole 12 is movably sleeved on the support rod 9. One end of the support rod 9 is installed on the support plate 8, and the other end of the support rod 9 is threadedly sleeved in the first nut 11. The two ends of the first spring 10 are respectively in contact with the first nut 11 and the fixing plate 7. The number of the support rods 9 and the sleeve holes 12 is not less than two. By placing the busbar insert of the busbar connection structure between the fixing plate 7 and the support plate 8, with the elastic force of the first spring 10, the busbar insert of the busbar connection structure is clamped between the fixing plate 7 and the support plate 8, so as to facilitate the installation of the thermistor 4 on the busbar insert of the busbar connection structure, so as to conveniently use the thermistor 4 to detect the temperature of the busbar connection structure. Moreover, by turning the first nut 11, it is convenient to adjust the clamping distance between the fixing plate 7 and the support plate 8 and the clamping force of the busbar connection structure clamped between the fixing plate 7 and the support plate 8, so as to facilitate the installation of the thermistor 4 on busbar connection structures of various sizes.

[0024] It should be noted that the thermistor 4 is installed at one end of the fixed tube 6, and the wiring of the thermistor 4 passes through the fixed tube 6 to facilitate connecting the thermistor 4 to the monitoring module 1. A perforation 13 is formed in the fixed plate 7, and the fixed tube 6 is movably sleeved in the perforation 13. A second nut 14 is threadedly sleeved at the end of the fixed tube 6 away from the thermistor 4. There is a second spring 15 between the second nut 14 and the fixed plate 7. The second spring 15 is movably sleeved on the fixed tube 6, and the two ends of the second spring 15 are respectively in contact with the second nut 14 and the fixed plate 7. A fixing ring 16 is arranged between the fixed plate 7 and the thermistor 4. The fixing ring 16 is fixedly sleeved on the fixed tube 6, and the outer diameter of the fixing ring 16 is not less than the aperture of the perforation 13. With the elastic force of the second spring 15, it is convenient to tightly press the extrusion silicone layer 5 against the connection between the busbar plug of the busbar connection structure and the sub-wire, so as to facilitate the temperature transfer at the connection between the busbar plug of the busbar connection structure and the sub-wire to the thermistor 4. Moreover, by turning the second nut 14, it is convenient to adjust the pressing force of the extrusion silicone layer 5 attached to the busbar connection structure.

[0025] In this embodiment, the resistance value of the thermistor 4 increases as the temperature rises. A relay 17 is arranged on one side of the thermistor 4. The thermistor 4 is connected to the monitoring module 1 through the coil of the relay 17. The first normally open switch of the relay 17 is installed on the sub-wire of the busbar connection structure. If the temperature at the connection between the busbar plug and the sub-wire is too high, the resistance value of the thermistor 4 will increase, resulting in the inability of the coil end of the relay 17 to adsorb the first normally open switch of the relay 17, causing the first normally open switch of the relay 17 to disconnect to avoid accidents.

[0026] Specifically, a normally closed push-button switch 18 and a normally open push-button switch 19 are arranged between the thermistor 4 and the monitoring module 1. A second normally open switch of the relay 17 is arranged in parallel on one side of the normally open push-button switch 19. The normally closed push-button switch 18 is connected to the monitoring module 1 through the normally open push-button switch 19 or the second normally open switch of the relay 17. The thermistor 4 and the coil of the relay 17 are connected to the normally open push-button switch 19 or the second normally open switch of the relay 17 through the normally closed push-button switch 18. The normally open push-button switch 19 is the power-on switch of the thermistor 4, and the normally closed push-button switch 18 is the open-circuit switch of the thermistor 4. After pressing the normally open push-button switch 19, the coil of the relay 17 and the thermistor 4 are powered on, causing the coil of the relay 17 to adsorb and close the second normally open switch of the relay 17. Therefore, after releasing the normally open push-button switch 19, the circuit where the thermistor 4 and the coil of the relay 17 are located still remains powered on. When the normally closed push-button switch 18 is pressed, the circuit where the thermistor 4 and the coil of the relay 17 are located will be powered off, causing the second normally open switch of the relay 17 to lose the adsorption force and disconnect. Therefore, after releasing the normally closed push-button switch 18, the circuit where the thermistor 4 and the coil of the relay 17 are located still remains disconnected.

[0027] Please refer to again Figure 2 and 3 On one side of the monitoring module 1, a warning lamp 20 and a normally closed switch of the relay 17 are provided. The warning lamp 20 is connected to the monitoring module 1 through the normally closed switch of the relay 17. For this reason, the coil of the relay 17 adsorbs the normally closed switch of the relay 17 to disconnect, thereby opening the circuit of the warning lamp 20; if the coil of the relay 17 is open or the current in the circuit where the coil of the relay 17 is located is too small, the coil end of the relay 17 cannot adsorb the normally closed switch of the relay 17, making the normally closed switch of the relay 17 closed, so that the warning lamp 20 is energized and emits light, so as to facilitate the maintenance personnel to understand the power supply situation of the circuit where the coil of the relay 17 is located.

[0028] In this embodiment, a box body 21 is provided on the monitoring module 1. The monitoring module 1, the main control switch 2 and the antenna 3 are respectively installed in the box body 21 to protect the monitoring module 1 and the main control switch 2. The warning lamp 20, the normally closed push-button switch 18 and the normally open push-button switch 19 are respectively embedded on the box body 21 to facilitate the operation of the normally closed push-button switch 18 and the normally open push-button switch 19, and to facilitate the observation of the warning lamp 20; a plurality of through holes are respectively opened at the top end and the bottom end of the box body 21. A protective sleeve 22 made of an elastic material is fixedly sleeved in the through hole. The monitoring module 1 is connected to the thermistor 4 or the relay 17 through a wire, and the wire is press-fitted in the protective sleeve 22, so as to facilitate the connection between the thermistor 4 and the relay 17 and the monitoring module 1, and to protect the wire connecting the thermistor 4 and the relay 17.

[0029] It should be noted that a fuse 23 is provided between the monitoring module 1 and the main control switch 2. The main control switch 2 is connected to the monitoring module 1 through the fuse 23. The fuse 23 is installed in the box body 21. For this reason, when the current provided by the power supply circuit of the monitoring module 1 exceeds the specified value, the heat generated by the fuse 23 itself melts the fuse wire, thereby disconnecting the circuit where the monitoring module 1 is located, so as to realize overcurrent protection for the power supply circuit of the monitoring module 1.

[0030] The assembly method of this product is as follows: As Figures 1 to 7As shown in the figure, first, disconnect the circuit where the busbar connection structure is located, install the box body 21 on the switch cabinet, and pull the fixing plate 7 and the support plate 8 to compress the first spring 10. Then, wrap the fixing plate 7 and the support plate 8 around both sides of the busbar socket, so that the thermistor 4 is located on one side of the connection between the busbar socket and the sub-wire. By releasing the fixing plate 7 and the support plate 8, the second spring 15 is used to squeeze the fixing tube 6, so as to squeeze the silica gel layer 5 at the connection between the busbar socket and the sub-wire. By tightening the first nut 11 and the second nut 14 in sequence, the thermistor 4 is fixed to the busbar socket, so as to facilitate the transfer of the heat at the connection between the busbar socket and the sub-wire to the thermistor 4. Then, install the first normally open switch of the relay 17 on the sub-wire, connect the master control switch 2 to the power supply, close the master control switch 2, and then press the normally open button switch 19 to facilitate the use of this product to monitor the temperature of the busbar connection structure.

[0031] It should be noted that if the temperature at the connection between the busbar socket and the sub-wire is too high, the resistance of the thermistor 4 will increase, making it difficult for the coil of the relay 17 to attract the first normally open switch, the second normally open switch and the normally closed switch of the relay 17. As a result, the circuits where the thermistor 4 and the coil of the relay 17 are located and the circuit where the sub-wire is located are opened, and the circuit where the warning lamp 20 is located is energized, thus preventing damage to the circuit where the sub-wire is located and the circuits where the thermistor 4 and the coil of the relay 17 are located. By the lighting of the warning lamp 20, the location of the fault can be quickly judged to facilitate maintenance.

[0032] In this embodiment, by placing several thermistors 4 at the connections between multiple sub-wires and busbar sockets respectively, since the temperature changes at the connections between multiple sub-wires and busbar sockets will cause the resistance value of the thermistor 4 to change accordingly, thereby changing the current passing through the circuit where the thermistor 4 is located, so that the monitoring module 1 monitors the change of the current of the thermistor 4, thus facilitating the separate monitoring of the temperatures at the connections between multiple sub-wires and busbar sockets. The set antenna 3 is used to transmit the temperature information of the monitored busbar connection structure outward, so as to meet the requirement of real-time monitoring. Furthermore, according to the temperature information, it is helpful to find out the reason for the too high temperature of the busbar connection structure. By setting the master control switch 2, the start and stop of the power supply to the monitoring module 1 can be controlled. Moreover, in this embodiment, by setting the silica gel layer 5, it is convenient to transfer the heat of the busbar connection to the thermistor 4 and insulate the busbar connection and the thermistor 4, avoiding the transfer of the current in the circuit where the busbar connection is located to the thermistor 4. By setting the fixing plate 7, the support plate 8, the support rod 9, the first spring 10 and the first nut 11, the busbar socket of the busbar connection structure is clamped between the fixing plate 7 and the support plate 8, so as to facilitate the installation of the thermistor 4 on the busbar socket of the busbar connection structure and facilitate the loading and unloading of the thermistor 4.

[0033] The embodiments described above are only the preferred embodiments of the present invention, and do not limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made according to the structure, features, and principles described in the scope of the present invention patent shall be included within the scope of the patent application of the present invention.

Claims

1. A temperature monitoring device for a busbar lap joint structure, comprising a monitoring module (1), characterized in that: A master switch (2), an antenna (3) and a plurality of thermistors (4) are respectively connected to the described monitoring module (1). Silicone layers (5) are respectively coated on the temperature sensing ends of the plurality of thermistors (4), and clamping mechanisms are respectively arranged on the plurality of thermistors (4); The described clamping mechanism includes a fixed tube (6) arranged on the side of the thermistor (4) away from the silicone layer (5), a fixing plate (7) sleeved on the fixed tube (6), a support plate (8) arranged on the other side of the thermistor (4), a support rod (9) arranged on the support plate (8), and a first spring (10) and a first nut (11) respectively sleeved on the support rod (9). A sleeve hole (12) is formed in the fixing plate (7), and the sleeve hole (12) is movably sleeved on the support rod (9). One end of the support rod (9) is installed on the support plate (8), and the other end of the support rod (9) is threadedly sleeved in the first nut (11). Two ends of the first spring (10) are respectively in contact with the first nut (11) and the fixing plate (7).

2. The temperature monitoring device for the busbar lap joint structure according to claim 1, characterized in that: The described thermistor (4) is installed on one end of the fixed tube (6). A through hole (13) is formed in the fixing plate (7), and the fixed tube (6) is movably sleeved in the through hole (13). A second nut (14) is threadedly sleeved on the end of the fixed tube (6) away from the thermistor (4). A second spring (15) is arranged between the second nut (14) and the fixing plate (7). The second spring (15) is movably sleeved on the fixed tube (6). Two ends of the second spring (15) are respectively in contact with the second nut (14) and the fixing plate (7). A fixing ring (16) is arranged between the fixing plate (7) and the thermistor (4). The fixing ring (16) is fixedly sleeved on the fixed tube (6), and the outer diameter of the fixing ring (16) is not less than the aperture of the through hole (13).

3. The temperature monitoring device for the busbar lap joint structure according to claim 1, characterized in that: The resistance value of the described thermistor (4) increases as the temperature rises. A relay (17) is arranged on one side of the thermistor (4). The thermistor (4) is connected to the monitoring module (1) through the coil of the relay (17).

4. The temperature monitoring device for the busbar lap joint structure according to claim 3, characterized in that: A normally closed push button switch (18) and a normally open push button switch (19) are arranged between the thermistor (4) and the monitoring module (1). A second normally open switch of the relay (17) is arranged in parallel on one side of the normally open push button switch (19). The normally closed push button switch (18) is connected to the monitoring module (1) through the normally open push button switch (19) or the second normally open switch of the relay (17). The thermistor (4) and the coil of the relay (17) are connected to the normally open push button switch (19) or the second normally open switch of the relay (17) through the normally closed push button switch (18).

5. The temperature monitoring device for the busbar lap joint structure according to claim 3, characterized in that: A warning lamp (20) and a normally closed switch of the relay (17) are arranged on one side of the monitoring module (1). The warning lamp (20) is connected to the monitoring module (1) through the normally closed switch of the relay (17).

6. The temperature monitoring device for the busbar lap joint structure according to claim 4 or 5, characterized in that: A box body (21) is provided on the described monitoring module (1). The monitoring module (1), the master control switch (2) and the antenna (3) are respectively installed in the box body (21). The warning lamp (20), the normally closed push-button switch (18) and the normally open push-button switch (19) are respectively inlaid on the box body (21). A plurality of through holes are respectively opened at the top end and the bottom end of the box body (21). A protective sleeve (22) made of an elastic material is fixedly sleeved in the through hole. The described monitoring module (1) is connected to the thermistor (4) or the relay (17) through a wire, and the wire is press-fitted and sleeved in the protective sleeve (22).

7. The temperature monitoring device for the busbar lap joint structure according to claim 1, characterized in that: A fuse (23) is provided between the described monitoring module (1) and the master control switch (2), and the master control switch (2) is connected to the monitoring module (1) through the fuse (23).

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