Junction box with overheating protection device

Abstract

The utility model relates to the technical field of junction boxes, in particular to a junction box with an overheating protection device, which comprises a box body, a plurality of connector lugs are fixedly connected inside the box body, conducting strips are detachably connected to the front ends of the connector lugs on the left side and the right side, and thermoswitches are fixedly connected to the rear ends of the conducting strips. The conducting strip is sleeved with a sealing ring, the outer side of the sealing ring is attached to the interior of the front end of the connector lug at the corresponding position, and an extrusion piece is placed on the inner side of the sealing ring; the beneficial effects are that the thermoswitch is integrated on the conducting strip, so that the thermoswitch can be inserted into the connector lug, and the sealing ring is installed at the joint of the conducting strip and the connector lug, thereby greatly reducing the influence of the external environment on the thermoswitch, reducing the maintenance frequency of the thermoswitch, improving the maintenance efficiency, and reducing the maintenance cost. Therefore, the current conduction efficiency is not reduced under the condition that the use safety is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of junction boxes, in particular to a junction box with an overheat protection device. Background Art

[0002] With the rapid development of the photovoltaic industry, when photovoltaic modules are in use, junction boxes are installed on the photovoltaic modules to connect and protect the solar photovoltaic modules, connect the power generated by the solar cells to the external lines, and conduct the current generated by the photovoltaic modules. In order to prevent the electrical system of the solar power generation system from causing safety problems due to excessive temperature, an overheating protection device is generally installed.

[0003] Conventional junction boxes with overheat protection devices generally consist of a thermal switch, a box body, connectors, conductive sheets, and other structures. By installing a thermal switch between every two terminal heads, it is possible to effectively prevent equipment damage or fire accidents caused by overheating of the junction box, thereby protecting the safety of personnel and property.

[0004] However, in actual use, the thermal switch may malfunction due to fluctuations in ambient temperature or other non-electrical factors, requiring regular inspection. However, the installation of multiple thermal switches makes the interior of the junction box more complicated, resulting in low maintenance efficiency of the thermal switch, which in turn affects the normal conduction efficiency of the current. Utility Model Content

[0005] The purpose of the present utility model is to provide a junction box with an overheat protection device to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a junction box with an overheating protection device, comprising a box body, wherein a plurality of terminal heads are fixedly connected to the interior of the box body, the front ends of the terminal heads on the left and right sides are detachably connected to conductive sheets, the rear ends of the conductive sheets are fixedly connected to a thermal switch, a sealing ring is provided on the outside of the conductive sheet, the outer side of the sealing ring is in contact with the inner side of the front end of the terminal head at the corresponding position, and an extrusion sheet is placed on the inside of the sealing ring.

[0007] Preferably, two mounting grooves are provided inside the left and right sides of the conductive sheet, and push blocks are slidably connected inside the mounting grooves. The left and right push blocks are fixedly connected to the separated sides with extrusion rods, and one end of the extrusion rod away from the push block is fixedly connected to the extrusion sheet, and an elastic member is sleeved on the outside of the extrusion rod.

[0008] Preferably, a slot is provided inside the front end of the left and right sides of the terminal head, a groove is provided on the inner wall of the slot, a plurality of plug-in blocks are fixedly connected to the rear end of the conductive sheet, the plug-in blocks are engaged with the inside of the slots at corresponding positions, a protrusion is fixedly connected to the outside of the plug-in block, a limiting slot is provided inside the plug-in block, a limiting rod is slidably connected to the inside of the limiting slot, and a push rod is fixedly connected to the front end of the limiting rod.

[0009] Preferably, the extrusion sheet is slidably connected to the inside of the conductive sheet, the end of the push block away from the extrusion rod is designed as an arc, and the extrusion rod is slidably connected to the inside of the installation groove.

[0010] Preferably, one end of the elastic member is fixedly connected to the inner wall of the mounting groove, and the other end of the elastic member is fixedly connected to the push block.

[0011] Preferably, the rear end of the limiting rod fits with the inner wall of the slot, the push rod is slidably connected to the inside of the limiting slot, the end of the push rod away from the limiting rod is designed as an arc, and the push rod slides with the push block.

[0012] Preferably, the exterior of the protrusion is designed with two conical surfaces, and the curvature of the rear conical surface is more inclined than that of the front conical surface, and the protrusion fits in the interior of the groove at the corresponding position.

[0013] Compared with the prior art, the beneficial effect of the junction box with an overheat protection device proposed by the utility model is that: by integrating the thermal switch on the conductive sheet, the thermal switch can be inserted into the interior of the terminal head, thereby making the installation and disassembly of the thermal switch relatively simple, and a sealing ring is installed at the connection between the conductive sheet and the terminal head, thereby greatly reducing the impact of the external environment on the thermal switch, thereby not only reducing the number of maintenance times for the thermal switch, but also improving the maintenance efficiency, thereby ensuring that the current conduction efficiency will not be reduced while ensuring safety of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional diagram of the utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the wiring head of the utility model;

[0016] Figure 3 This is a front view of the conductive sheet of the utility model;

[0017] Figure 4 For this utility model Figure 3 Structural cross-section at AA in the middle;

[0018] Figure 5 For this utility model Figure 3 Structural cross-section at the middle BB;

[0019] Figure 6 For this utility model Figure 5 A magnified view of the structure in the middle.

[0020] In the figure: 1. Box body; 2. Terminal block; 3. Conductive sheet; 4. Thermal switch; 5. Sealing ring; 6. Mounting slot; 7. Push block; 8. Extrusion rod; 9. Elastic member; 10. Extrusion sheet; 11. Insert block; 12. Bump; 13. Limiting slot; 14. Limiting rod; 15. Push rod; 16. Slot; 17. Groove. DETAILED DESCRIPTION

[0021] In order to clearly and completely describe the purpose and technical solution of the present invention and make its advantages more clearly understood, the following is a further detailed description of the embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only part of the embodiments of the present invention, not all of them, and are only used to explain the embodiments of the present invention and are not intended to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] Example 1: Please refer to Figures 1-6 When the breaker is in the working state, the breaker 3 is in the working state, and the breaker 3 is in the working state.

[0023] When the thermal switch 4 needs to be repaired, the conductive sheet 3 is pulled forward so that the conductive sheet 3 drives the sealing ring 5 to slide out of the interior of the corresponding position terminal head 2, and the conductive sheet 3 drives the thermal switch 4 to be pulled out from the interior of the corresponding position terminal head 2, so that the thermal switch 4 can be conveniently disassembled and repaired. Conversely, the thermal switch 4 is slid into the interior of the corresponding position terminal head 2, and the conductive sheet 3 is slid into the interior of the corresponding position terminal head 2, so that the conductive sheet 3 drives the sealing ring 5 to enter the interior of the corresponding position terminal head 2. At this time, the extrusion sheets 10 on the left and right sides are moved away from each other, so that the extrusion sheets 10 can squeeze the sealing ring 5 to produce deformation, thereby making the sealing effect of the sealing ring 5 on the connection between the conductive sheet 3 and the corresponding position terminal head 2 better. This not only makes the installation and disassembly of the thermal switch 4 simpler and improves the maintenance efficiency, but also greatly reduces the influence of the external environment on the thermal switch 4, reduces the number of maintenance times of the thermal switch 4, and thus ensures the safety of use. The current conduction efficiency will not be reduced.

[0024] Example 2: On the basis of Example 1, in order to facilitate the pushing and extrusion sheet 10 to extrude the sealing ring 5 to produce deformation, two mounting grooves 6 are provided on the left and right sides of the conductive sheet 3. A push block 7 is slidably connected to the inside of the mounting groove 6. The mounting groove 6 limits the push block 7 so that the push block 7 will not deviate when sliding. The separated sides of the left and right push blocks 7 are fixedly connected with an extrusion rod 8. The extrusion rod 8 is slidably connected to the inside of the mounting groove 6. The mounting groove 6 limits the extrusion rod 8 so that the extrusion rod 8 can slide smoothly. The end of the push block 7 away from the extrusion rod 8 is designed as an arc. The end of the extrusion rod 8 away from the push block 7 is fixedly connected to the extrusion sheet 10. The outside of the extrusion rod 8 is provided with an elastic member 9. One end of the elastic member 9 is fixedly connected to the inner wall of the mounting groove 6, and the other end of the elastic member 9 is fixedly connected to the push block 7.

[0025] When it is necessary to push the extrusion sheet 10, the push block 7 is moved toward the extrusion sheet 10, so that the push block 7 can squeeze the elastic member 9 to cause deformation, and the push block 7 can push the extrusion rod 8 to move toward the extrusion sheet 10, so that the extrusion rod 8 can push the extrusion sheet 10 to squeeze the sealing ring 5 to cause deformation. Conversely, by loosening the push block 7, the elastic member 9 can perform a reset movement, so that the elastic member 9 can push the push block 7 to move inward, so that the push block 7 can pull the extrusion rod 8 to move inward, and so that the extrusion rod 8 can pull the extrusion sheet 10 to separate from the sealing ring 5.

[0026] Embodiment 3: On the basis of embodiment 2, in order to achieve more stable installation of the conductive sheet 3 and facilitate the movement of the push block 7, a slot 16 is provided inside the front end of the left and right side terminal heads 2, and a groove 17 is provided on the inner wall of the slot 16. The rear end of the conductive sheet 3 is fixedly connected with a plurality of plug-ins 11, and the plug-ins 11 are engaged with the inside of the slots 16 at the corresponding positions, so that the conductive sheet 3 can be stably installed, and the outside of the plug-in block 11 is fixedly connected with a protrusion 12. The outside of the protrusion 12 is designed with two conical surfaces, and the curvature of the rear conical surface is more inclined than the curvature of the front conical surface, so that the protrusion 12 can slide into the inside of the slot 16 conveniently, and the protrusion 12 fits with the inside of the groove 17 at the corresponding position, thereby increasing the friction between the plug-in block 11 and the slot 16, so that the plug-in block 11 and the plug The slot 16 is more stably connected, and a limiting slot 13 is provided inside the insert block 11. The internal sliding connection of the limiting slot 13 is connected to the limiting rod 14. The limiting slot 13 limits the limiting rod 14, so that the limiting rod 14 will not deviate when sliding, and the rear end of the limiting rod 14 fits into the inner wall of the slot 16, so that the slot 16 can push the limiting rod 14 to move. The front end of the limiting rod 14 is fixedly connected with a push rod 15, and the push rod 15 is slidably connected to the inside of the limiting slot 13. The limiting slot 13 limits the push rod 15, so that the push rod 15 can slide smoothly. The end of the push rod 15 away from the limiting rod 14 is designed as an arc, and the push rod 15 slides with the push block 7, so that the arc of the push rod 15 can slide with the arc of the push block 7, thereby enabling the push rod 15 to push the push block 7 to move.

[0027] When the conductive sheet 3 needs to be installed, the conductive sheet 3 is inserted into the interior of the terminal head 2 at the corresponding position, so that the plug block 11 can drive the protrusion 12 and the limiting rod 14 to slide into the interior of the slot 16, so that the protrusion 12 can be squeezed and deformed by the slot 16, and then when the plug block 11 is engaged with the slot 16, the protrusion 12 can be reset, so that the protrusion 12 can fit into the interior of the groove 17, thereby making the engagement between the plug block 11 and the slot 16 more stable, and the limiting rod 14 can fit into the inner wall of the slot 16, under the reaction force, the limiting rod 14 can slide forward, so that the limiting rod 14 can push the push rod 15 to move forward, so that the push rod 15 pushes the push block 7 to move outward, conversely, by pulling the plug block 11 out of the interior of the slot 16, the conical surface of the protrusion 12 can slide inside the groove 17, so that the protrusion 12 can be disengaged from the interior of the groove 17, thereby making the conductive sheet 3 easy to remove.

[0028] In actual use, when the thermal switch 4 needs to be repaired, the conductive sheet 3 is pulled forward so that the conductive sheet 3 can pull the plug 11 to move forward, thereby allowing the plug 11 to be extracted from the inside of the slot 16, so that the conical surface of the protrusion 12 can slide inside the groove 17, thereby allowing the protrusion 12 to disengage from the inside of the groove 17, so that the slot 16 no longer squeezes the limit rod 14, so that the push rod 15 no longer pushes the push block 7, so that the elastic member 9 can perform a reset movement, thereby allowing the elastic member 9 to push the push block 7 to move inward, so that the push block 7 can push the push rod 15 to move backward. The push block 7 pulls the extrusion rod 8 to move inward, and then the extrusion rod 8 pulls the extrusion sheet 10 to separate from the sealing ring 5, so that the conductive sheet 3 can drive the sealing ring 5 to slide out of the interior of the corresponding position terminal head 2, and the conductive sheet 3 can drive the thermal switch 4 to be extracted from the interior of the corresponding position terminal head 2, so that the thermal switch 4 can be conveniently disassembled and repaired. Conversely, by sliding the thermal switch 4 into the interior of the corresponding position terminal head 2 and the conductive sheet 3 into the interior of the corresponding position terminal head 2, the conductive sheet 3 can drive the sealing ring 5 into the interior of the corresponding position terminal head 2, and then The insert block 11 drives the protrusion 12 and the limiting rod 14 to slide into the interior of the slot 16, so that the protrusion 12 is squeezed by the slot 16 to produce deformation, and then when the insert block 11 is engaged with the slot 16, the protrusion 12 is able to perform a reset movement, so that the protrusion 12 is able to fit with the inside of the groove 17, thereby making the insertion block 11 and the slot 16 more stable, and the limiting rod 14 is able to fit with the inner wall of the slot 16. Under the reaction force, the limiting rod 14 is able to slide forward, thereby allowing the limiting rod 14 to push the push rod 15 to move forward, so that the push rod 15 can push the push block 7 to move outward. , so that the push block 7 can squeeze the elastic member 9 to produce deformation, and the push block 7 can push the extrusion rod 8 to move in the direction close to the extrusion sheet 10, and then the extrusion rod 8 can push the extrusion sheet 10 to squeeze the sealing ring 5 to produce deformation, so that the sealing ring 5 has a better sealing effect on the connection between the conductive sheet 3 and the corresponding position terminal 2, thereby not only making the installation and disassembly of the thermal switch 4 simpler and improving the maintenance efficiency, but also greatly reducing the impact of the external environment on the thermal switch 4, reducing the number of maintenance times of the thermal switch 4, so that the current conduction efficiency will not be reduced while ensuring the safety of use.

[0029] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A junction box with an overheat protection device, comprising a box body (1), wherein a plurality of terminal blocks (2) are fixedly connected to the interior of the box body (1), characterized in that: The front ends of the left and right wiring heads (2) are detachably connected to conductive sheets (3), the rear ends of the conductive sheets (3) are fixedly connected to thermal switches (4), the outer sides of the conductive sheets (3) are covered with sealing rings (5), the outer sides of the sealing rings (5) are in contact with the inner sides of the front ends of the wiring heads (2) at the corresponding positions, and an extrusion sheet (10) is placed on the inner sides of the sealing rings (5).

2. The junction box with an overheat protection device according to claim 1, characterized in that: Two mounting grooves (6) are provided inside the left and right sides of the conductive sheet (3), and a push block (7) is slidably connected inside the mounting groove (6). The left and right push blocks (7) are fixedly connected to the separated sides of each other with an extrusion rod (8), and one end of the extrusion rod (8) away from the push block (7) is fixedly connected to the extrusion sheet (10), and an elastic member (9) is sleeved on the outside of the extrusion rod (8).

3. The junction box with an overheat protection device according to claim 2, characterized in that: A slot (16) is provided inside the front end of the left and right sides of the wiring head (2), and a groove (17) is provided on the inner wall of the slot (16). The rear end of the conductive sheet (3) is fixedly connected with a plurality of plug-in blocks (11), and the plug-in blocks (11) are engaged with the inside of the slots (16) at corresponding positions. The outside of the plug-in blocks (11) is fixedly connected with a protrusion (12), and the inside of the plug-in blocks (11) is provided with a limiting slot (13). The inside of the limiting slot (13) is slidably connected to a limiting rod (14), and the front end of the limiting rod (14) is fixedly connected with a push rod (15).

4. The junction box with an overheat protection device according to claim 2, characterized in that: The extrusion sheet (10) is slidably connected to the inside of the conductive sheet (3); the end of the push block (7) away from the extrusion rod (8) is designed as an arc; and the extrusion rod (8) is slidably connected to the inside of the mounting groove (6).

5. The junction box with an overheat protection device according to claim 2, characterized in that: One end of the elastic member (9) is fixedly connected to the inner wall of the mounting groove (6), and the other end of the elastic member (9) is fixedly connected to the push block (7).

6. The junction box with an overheat protection device according to claim 3, characterized in that: The rear end of the limiting rod (14) fits into the inner wall of the slot (16), and the push rod (15) is slidably connected to the inside of the limiting groove (13). The end of the push rod (15) away from the limiting rod (14) is designed as an arc, and the push rod (15) slides with the push block (7).

7. The junction box with an overheat protection device according to claim 3, characterized in that: The outside of the convex block (12) is designed with two conical surfaces, and the curvature of the rear conical surface is relatively inclined relative to the curvature of the front conical surface. The convex block (12) fits in place with the inside of the groove (17) at the corresponding position.

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