Lightning protection junction box of sensor

Abstract

The utility model discloses a lightning protection junction box of a sensor, which relates to the technical field of junction boxes, and comprises a box body, the front end of the box body is movably connected with a box cover, the inner side of the box body is fixedly connected with an insulating shell, a conductive frame is fixedly connected between the box body and the insulating shell, and the inner side of the insulating shell is fixedly connected with a wiring terminal strip. According to the utility model, the conductive frame grounding structure forms a low-impedance thunder and lightning discharge loop, the grounding resistance is low, the thunder and lightning response speed is fast, the thunder and lightning energy can be rapidly guided into the ground, the sensor is effectively protected from being damaged by the thunder and lightning, and the reliability of the sensor is improved. The fault rate of the sensor caused by lightning stroke is greatly reduced, the clamping plate and the adjusting ring form an adjustable fixing assembly, self-adaptive adjustment can be carried out according to the diameter of a cable, rapid locking and unlocking of the box cover can be achieved through knob operation, other tools are not needed, and the mounting and dismounting efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of junction box technology, specifically to a lightning protection junction box for a sensor. Background Technology

[0002] In modern industrial production, environmental monitoring, and intelligent transportation, sensors, as key data acquisition devices, undertake the important task of converting physical quantities into electrical signals.

[0003] Currently, sensor surge protection junction boxes on the market use simple single-point grounding or only a single surge protection element, such as a varistor. This design makes the lightning discharge path circuitous and difficult to conduct lightning energy to the ground in a timely manner, resulting in a high risk of damage to the sensor. In addition, the cable inlet holes of traditional junction boxes are usually of fixed diameter, making it difficult to adapt to cables of different diameters. The locking structure of the box cover often uses multiple bolts to fix it one by one, which is not only inefficient to install, but also prone to damage or loss of bolts during frequent disassembly and assembly, affecting the normal use of the junction box. Therefore, a surge protection junction box for sensors is proposed to solve the problems mentioned above. Utility Model Content

[0004] To address the aforementioned technical problems, a surge protection junction box for sensors is provided. This technical solution solves the problems mentioned in the background section. Currently available surge protection junction boxes for sensors use simple single-point grounding or only a single surge protection element, such as a varistor. This design makes the lightning discharge path circuitous and difficult to conduct lightning energy to the ground in a timely manner, resulting in a high risk of damage to the sensor. Furthermore, the cable inlet holes of traditional junction boxes are usually of a fixed diameter, making it difficult to adapt to cables of different diameters. The locking structure of the box cover often uses multiple bolts to fix it one by one, which is not only inefficient to install, but also prone to damage or loss of bolts during frequent disassembly and assembly, affecting the normal use of the junction box.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A surge protection junction box for a sensor includes a box body, a cover movably connected to the front end of the box body, an insulating shell fixedly connected to the inner side of the box body, a conductive frame fixedly connected between the box body and the insulating shell, a terminal block fixedly connected to the inner side of the insulating shell, multiple through holes extending through the box body, the insulating shell, and the conductive frame at both ends, a fixing seat fixedly connected to the inner side of the through holes in the box body, and rubber insulating rings fixedly connected to the inner sides of the through holes in the insulating shell and the conductive frame, with four terminals fixedly connected to the left end of the left fixing seat and the right end of the right fixing seat. The clamping plates are evenly distributed, and the outer surface of the clamping plates is provided with external threads. An adjusting ring is connected to the outer surface of the clamping plates through the external threads. The diameters of the clamping plates and adjusting rings on the left and right sides, which are far apart from each other, gradually decrease. A grounding terminal is fixedly connected to the lower end of the conductive frame. The lower end of the grounding terminal passes through the lower end of the box and extends to the lower side of the box. Positioning holes are opened at the four corners of the front end of the box. Locking grooves are opened at the inner rear end of the positioning holes. A rotating column is rotatably connected to the rear end of the box cover. A locking protrusion is fixedly connected to the outer surface of the rotating column.

[0007] Preferably, a conductive block and a rubber insulating sealing block are fixedly connected to the rear end of the box cover, with the conductive block located outside the rubber insulating sealing block.

[0008] Preferably, the front end of the rotating column passes through the front end of the box cover and is fixedly connected to a knob.

[0009] Preferably, the rotating column is inserted into the inside of the positioning hole, and the locking protrusion is rotatably connected to the inside of the locking groove.

[0010] Preferably, two symmetrically distributed mounting plates are fixedly connected to both the upper and lower ends of the box body, and the front end of the mounting plate is provided with a mounting hole.

[0011] Preferably, a pointing protrusion is fixedly connected to the front end of the knob, and the pointing protrusion and the locking protrusion are oriented in the same direction.

[0012] The advantages of this utility model compared with the prior art are:

[0013] This solution proposes a lightning protection junction box for sensors. The conductive frame grounding structure forms a low-impedance lightning discharge circuit with low grounding resistance and fast lightning response speed, which can quickly conduct lightning energy into the ground, effectively protecting the sensor from lightning damage and significantly reducing the failure rate of the sensor caused by lightning. The clamp and adjustment ring constitute an adjustable fixing component, which can be adaptively adjusted according to the cable diameter. The box cover can be quickly locked and unlocked by the knob operation without the need for other tools, which improves the efficiency of installation and disassembly. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the box body in this utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the box cover in this utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the clamping plate in this utility model;

[0018] Figure 5 This is a schematic diagram of the positioning hole in this utility model;

[0019] Figure 6 This is a schematic diagram of the locking groove in this utility model;

[0020] Figure 7 for Figure 1 A magnified view of a portion of point A in the middle;

[0021] Figure 8 for Figure 3 A magnified view of a portion of point B in the middle.

[0022] The numbers on the map are:

[0023] 1. Box body; 2. Box cover; 3. Insulating shell; 4. Conductive frame; 5. Fixing base; 6. Clamping plate; 7. Adjusting ring; 8. Rubber insulating ring; 9. Grounding terminal; 10. Terminal block; 11. Positioning hole; 12. Locking groove; 13. Conductive block; 14. Rubber insulating sealing block; 15. Knob; 16. Rotating column; 17. Locking protrusion; 18. Pointing protrusion; 19. Mounting plate; 20. Mounting hole. Detailed Implementation

[0024] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0025] Reference Figures 1-8As shown, a surge protection junction box for a sensor includes a box body 1, a cover 2 movably connected to the front end of the box body 1, an insulating shell 3 fixedly connected to the inside of the box body 1, a conductive frame 4 fixedly connected between the box body 1 and the insulating shell 3, a terminal block 10 fixedly connected to the inside of the insulating shell 3, multiple wire-passing holes through the left and right ends of the box body 1, the insulating shell 3, and the conductive frame 4, a fixing seat 5 fixedly connected to the inside of the wire-passing holes of the box body 1, and rubber insulating rings 8 fixedly connected to the inside of the wire-passing holes of the insulating shell 3 and the conductive frame 4, and four evenly spaced wire-passing holes fixedly connected to the left end of the left fixing seat 5 and the right end of the right fixing seat 5. The fabric clamping plate 6 has an external thread on its outer surface. An adjusting ring 7 is connected to the outer surface of the clamping plate 6 via the external thread. The diameters of the left clamping plate 6 and the adjusting ring 7 and the right clamping plate 6 and the adjusting ring 7 gradually decrease at their ends. A grounding terminal 9 is fixedly connected to the lower end of the conductive frame 4. The lower end of the grounding terminal 9 passes through the lower end of the box body 1 and extends to the lower side of the box body 1. Positioning holes 11 are opened at the four corners of the front end of the box body 1. Locking grooves 12 are opened at the inner rear end of the positioning holes 11. A rotating column 16 is rotatably connected to the rear end of the box cover 2. A locking protrusion 17 is fixedly connected to the outer surface of the rotating column 16.

[0026] Furthermore, by rotating the adjusting ring 7 and moving it toward the box 1, the clamping plate 6 can be tightened, and conversely, it can be opened, thus adaptively clamping cables of different diameters. Combined with the elasticity of the rubber insulating ring 8, a sealed cavity is formed, achieving a good sealing effect and preventing rainwater, dust, etc. from entering the box along the cable.

[0027] Furthermore, the insulating shell 3 isolates the conductive frame 4 from the terminal block 10 to prevent power frequency current leakage and ensure the purity and safety of the sensor signal. The rubber insulating ring 8 further enhances the insulation and sealing performance at the wire hole.

[0028] Furthermore, the grounding terminal 9 is connected to the grounding wire, and the conductive frame 4 forms a low-impedance lightning discharge channel. When a lightning overvoltage enters the junction box, the lightning energy can be quickly directed to the ground through the grounding terminal 9 to protect the sensor and internal electrical components. The rubber insulating ring 8 ensures the insulation between the conductive frame 4 and the cable to prevent leakage.

[0029] Furthermore, a conductive block 13 and a rubber insulating sealing block 14 are fixedly connected to the rear end of the cover 2, with the conductive block 13 located on the outside of the rubber insulating sealing block 14.

[0030] Furthermore, the front end of the rotating column 16 passes through the front end of the box cover 2 and is fixedly connected to the knob 15. The rotating column 16 is inserted into the inside of the positioning hole 11, the locking protrusion 17 is rotatably connected to the inside of the locking groove 12, and the front end of the knob 15 is fixedly connected to the pointing protrusion 18.

[0031] Furthermore, after the lid 2 is placed on the box body 1, the four rotating posts 16 are inserted into the positioning holes 11, the conductive block 13 is in close contact with the conductive frame 4, and the rubber insulating sealing block 14 is in close contact with the insulating shell 3. The conductive block 13 enhances the conductive continuity between the box body 1 and the lid 2, while the rubber insulating sealing block 14 plays a sealing role. After the lid 2 is installed, the rotating posts 16 and the locking protrusion 17 are rotated by rotating the knob 15. When the locking protrusion 17 rotates 90°, it can be locked into the locking groove 12, realizing the four-point synchronous locking of the lid 2 and the box body 1. The operation is simple and quick, and the locking force is evenly distributed to ensure the sealing effect. The pointing protrusion 18 and the locking protrusion 17 are aligned, making it easy to observe the locking status of the lid 2.

[0032] Furthermore, two symmetrically distributed mounting plates 19 are fixedly connected to both the upper and lower ends of the box body 1. The front end of the mounting plate 19 is provided with a mounting hole 20, which is used to install bolts and other connecting parts, so as to fix the box body 1 to other structures.

[0033] Working principle: When the overvoltage generated by lightning enters the junction box through the cable, the current is first conducted to the conductive frame 4. Since the conductive frame 4, the grounding terminal 9, and the conductive block 13 of the box cover 2 form a low-impedance conductive circuit, the lightning energy can be quickly conducted to the ground through the grounding terminal 9, thereby protecting the sensor and internal electrical components. When connecting the cable, the cable is passed through the wire hole and the adjusting ring 7 is rotated. The adjusting ring 7 drives the clamp 6 to tighten towards the center through the thread, and works together with the rubber insulating ring 8 to form a sealed cavity, which can effectively prevent rainwater and dust from entering the box. During installation and maintenance, the locking protrusion 17 can be rotated by rotating the knob 15, which can quickly lock and unlock the box cover 2 without the need to use tools to remove multiple bolts, making the operation convenient and quick.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A surge protection junction box for a sensor, characterized in that, The device includes a box body (1), a box cover (2) movably connected to the front end of the box body (1), an insulating shell (3) fixedly connected to the inside of the box body (1), a conductive frame (4) fixedly connected between the box body (1) and the insulating shell (3), a terminal block (10) fixedly connected to the inside of the insulating shell (3), multiple wire holes are provided through the left and right ends of the box body (1), the insulating shell (3) and the conductive frame (4), a fixing seat (5) is fixedly connected to the inside of the wire hole of the box body (1), a rubber insulating ring (8) is fixedly connected to the inside of the wire hole of the insulating shell (3) and the conductive frame (4), and four evenly distributed clamps (6) are fixedly connected to the left end of the left fixing seat (5) and the right end of the right fixing seat (5). The outer surface of the clamp (6) is provided with external threads, and the outer surface of the clamp (6) is connected to the adjusting ring (7) through the external threads. The diameters of the clamp (6) and adjusting ring (7) on the left and the clamp (6) and adjusting ring (7) on the right are gradually reduced at the ends that are far away from each other. The lower end of the conductive frame (4) is fixedly connected to the grounding terminal (9). The lower end of the grounding terminal (9) passes through the lower end of the box (1) and extends to the lower side of the box (1). The four corners of the front end of the box (1) are provided with positioning holes (11). The inner rear end of the positioning holes (11) is provided with locking grooves (12). The rear end of the box cover (2) is rotatably connected to the rotating column (16). The outer surface of the rotating column (16) is fixedly connected to the locking protrusion (17).

2. The surge protection junction box for a sensor according to claim 1, characterized in that: The rear end of the box cover (2) is fixedly connected to a conductive block (13) and a rubber insulating sealing block (14), with the conductive block (13) located on the outside of the rubber insulating sealing block (14).

3. The surge protection junction box for a sensor according to claim 1, characterized in that: The front end of the rotating column (16) passes through the front end of the box cover (2) and is fixedly connected to a knob (15).

4. The surge protection junction box for a sensor according to claim 1, characterized in that: The rotating column (16) is inserted into the positioning hole (11), and the locking protrusion (17) is rotatably connected to the locking groove (12).

5. The surge protection junction box for a sensor according to claim 1, characterized in that: The upper and lower ends of the box (1) are fixedly connected to two symmetrically distributed mounting plates (19), and the front end of the mounting plate (19) is provided with a mounting hole (20).

6. The surge protection junction box for a sensor according to claim 3, characterized in that: The front end of the knob (15) is fixedly connected to a pointing protrusion (18), and the pointing protrusion (18) and the locking protrusion (17) are aligned in the same direction.

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