A photovoltaic cable connection point protection device

Abstract

The present invention discloses a photovoltaic cable connection point protection device, including a cable, an installation box, a driving component, a fire extinguishing component and an alarm component, wherein a junction box is slidably connected in the installation box, a connector is provided in the junction box, dry powder cylinders are connected to the two sides of the junction box, two second springs are fixedly connected to the inner wall of the installation box, and push plates are fixedly connected to one end of the two second springs, and two first racks are slidably connected in the installation box. The present invention moves the dry powder cylinder on the junction box outward, and the second rack drives the first rack through the gear to make the hook move toward the dry powder cylinder, thereby puncturing the second film, spraying the dry powder, disturbing the animal's sight and making it escape, avoiding further damage to the cable by the animal before the staff arrives, and minimizing the loss.

Description

Technical Field

[0001] The invention relates to the technical field of cable connection protection, and in particular to a photovoltaic cable connection point protection device. Background Art

[0002] As the demand for clean energy grows and the scale of photovoltaic power generation expands, the safety of photovoltaic cable connections is of vital importance. However, in the harsh natural environment outdoors, the cable insulation layer will age, increasing the risk of electrical failures; at the same time, external forces can easily loosen the connection, affecting power transmission and possibly generating electric sparks.

[0003] In this regard, a photovoltaic cable connection point protection device disclosed in the patent publication number "CN116706824B" can provide buffer protection for the photovoltaic cable under the action of a compression spring. When the first sleeve moves, the gear and the rack cooperate to cause the elastic telescopic clamp to automatically move down to reinforce the first connector and the second connector. Although it can prevent the photovoltaic cable from being dragged and damaged to a certain extent, during actual use, the clamping mechanism and the lubrication mechanism cannot protect the cable between the winding reel and the connector from being dragged. In outdoor environments, wild animals often appear. Out of instinctive curiosity or the influence of surrounding environmental factors, they will inadvertently approach the cable, bite it with their mouths, scratch it with their claws, or even try to drag the cable to play. When the cable between the winding reel and the connector is dragged, the cable is easily damaged or disconnected, thereby affecting the normal transmission of electrical energy.

[0004] Based on this, the present application proposes a photovoltaic cable connection point protection device. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a photovoltaic cable connection point protection device.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A photovoltaic cable connection point protection device, comprising a cable, an installation box, a driving component, a fire extinguishing component and an alarm component;

[0008] A junction box is slidably connected in the installation box, a connector is provided in the junction box, dry powder cylinders are connected to both sides of the junction box, two second springs are fixedly connected to the inner wall of the installation box, one end of the two second springs is fixedly connected to a push plate, and two first racks are slidably connected in the installation box;

[0009] The driving component is used to prevent animals from dragging the cable;

[0010] The fire extinguishing assembly is used to extinguish the fire in the junction box;

[0011] The alarm component is used to sound an alarm when a fire occurs or an animal drags the cable.

[0012] Preferably, the driving component is composed of two hooks and two second films, the two hooks are fixedly connected to one end of the two first racks, and the two second films are respectively arranged at the openings at one end of the two dry powder cylinders.

[0013] Preferably, the fire extinguishing assembly is composed of two cone spikes and two first films, the two cone spikes are respectively fixedly connected to the two push plates, and the two first films are respectively arranged at the connection points between the two dry powder cartridges and the junction box.

[0014] Preferably, a box cover is rotatably connected to the installation box, two round holes are provided on the installation box, fuse blocks are fixedly connected between the junction box and the two push plates, the cable is installed in the connector, two gears are rotatably connected to the installation box, the two gears are respectively meshed with the first rack, and two first springs are fixedly connected on both sides of the junction box.

[0015] Preferably, the two sides of the junction box are respectively fixedly connected with second racks, the two second racks are respectively slidably connected in the installation box, the two first racks are respectively fixedly connected with L-shaped connecting rods at the ends away from the hook barbs, and the two sides of the junction box are respectively fixedly connected with air cylinders.

[0016] Preferably, the alarm assembly consists of two sleeves, two pressure blocks and two trigger alarms, the two sleeves are respectively fixedly connected to two L-shaped connecting rods, the two pressure blocks are respectively slidably connected in the two sleeves, and the two trigger alarms are respectively fixedly installed on the inner wall of the installation box.

[0017] Preferably, the dry powder cylinder contains dry powder and compressed gas, the first film and the second film are made of stretched polypropylene film, the two hooks are slidably connected to the installation box, and the two fuse blocks are made of polyphenylene sulfide.

[0018] Preferably, a first piston is slidably connected in each of the two air cylinders, a first piston rod is slidably connected on the two air cylinders, one end of the two first piston rods are fixedly connected to the two push plates, and the other end is fixedly connected to the two first pistons, and one end of the first spring away from the junction box is fixedly connected to the inner wall of the installation box.

[0019] Preferably, the two gas cylinders are respectively connected to piston cylinders, the two piston cylinders are respectively slidably connected with second pistons, the two piston cylinders are respectively slidably connected with second piston rods, one end of the two second piston rods are respectively fixedly connected to the two second pistons, and the other end is respectively fixedly connected to the two pressure blocks, and the two second racks are respectively meshed and connected with the two second gears.

[0020] The present invention has the following beneficial effects:

[0021] Through the driving component, when the animal drags the cable, the connector will drive the junction box to slide in the installation box, so that the dry powder tube on the junction box moves outward, and the second rack drives the first rack through the gear to move the hook toward the dry powder tube, thereby puncturing the second film and spraying the dry powder, which disturbs the animal's vision and makes it escape, thereby preventing the cable from being further damaged by the animal before the arrival of the staff and minimizing the loss.

[0022] Through the alarm component, when the cable is dragged by an animal, the second rack will drive the first rack to slide through the gear, thereby driving the sleeve on the L-shaped connecting rod to move in the direction of the trigger alarm and eventually touch the alarm to trigger the alarm. While alerting the animal, it will eventually remind the staff to come and drive the animal away in time to prevent further damage to the cable.

[0023] Through the fire extinguishing component, when a short circuit occurs in the cable in the junction box and causes a fire, the high temperature will melt the fuse block, thereby releasing the rebound force of the second spring, causing the second spring to drive the push plate to move forward, causing the cone to pierce the first film, thereby causing the dry powder in the dry powder cylinder to spray out, suppressing and extinguishing the flame in the junction box, thereby ensuring that the fire is prevented from spreading further before the arrival of staff, and minimizing the damage to the photovoltaic cable connection point caused by the fire.

[0024] Through the alarm component, when the high temperature of the fire causes the fuse block to melt and the second spring drives the push plate to move forward, the push plate drives the first piston on the first piston rod to slide in the air cylinder, so that the air in the air cylinder pushes the second piston in the piston cylinder, so that the second piston drives the pressure block to move through the second piston rod, so that the pressure block touches the trigger alarm to trigger the alarm, reminding the staff to come and put out the fire in time, thereby ensuring the safe operation of the equipment and the stable transmission of electricity. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the overall structure of a photovoltaic cable connection point protection device proposed by the present invention;

[0026] Figure 2 This is a schematic diagram of the connection structure of a photovoltaic cable connection point protection device installation box, a first spring, a hook barb and other components proposed by the present invention;

[0027] Figure 3 This is a schematic diagram of the connection structure of the dry powder cylinder, connector, junction box and other components of a photovoltaic cable connection protection device proposed by the present invention;

[0028] Figure 4 This is a schematic diagram of the connection structure of the gas cylinder, piston cylinder, pressure block and other parts of the photovoltaic cable connection protection device proposed by the present invention;

[0029] Figure 5 This is an internal cross-sectional view of a piston cylinder and an air cylinder of a photovoltaic cable connection point protection device proposed by the present invention.

[0030] In the figure: 1 installation box, 2 junction box, 3 box cover, 4 round hole, 5 hook bar, 6 cable, 7 dry powder cylinder, 8 first film, 9 trigger alarm, 10 air cylinder, 11 first spring, 12 first piston rod, 13 second spring, 14 cone bar, 15 sleeve, 16 L-shaped connecting rod, 17 first rack, 18 second rack, 19 push plate, 20 gear, 21 fuse block, 22 connector, 23 second film, 24 piston cylinder, 25 second piston rod, 26 pressure block, 27 second piston, 28 first piston. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Embodiment 1

[0032] Reference Figure 1 - Figure 4 , a photovoltaic cable connection point protection device, comprising a cable 6, an installation box 1, a driving component, a fire extinguishing component and an alarm component;

[0033] The installation box 1 is rotatably connected with a box cover 3. Closing the box cover 3 during normal operation can effectively prevent dust, rainwater and other external impurities from entering the box. The installation box 1 is provided with two round holes 4, so that the hook barb 5 and the dry powder tube 7 can be brought close to each other through the round holes 4. A junction box 2 is slidably connected inside the installation box 1. A connector 22 is provided inside the junction box 2. The cable 6 is installed in the connector 22. The two sides of the junction box 2 are respectively connected with dry powder tubes 7. The dry powder tubes 7 contain dry powder and compressed gas. The compressed gas can spray out the dry powder in the dry powder tube 7. The first film 8 and the second film 23 are made of stretched polypropylene films, which have certain strength and sealing properties. When not triggered, they can effectively seal the dry powder and compressed gas in the dry powder tube 7 to prevent leakage, and can quickly rupture when punctured. The two hook barbs 5 are slidably connected to the installation box 1, two first springs 11 are fixedly connected on both sides of the junction box 2, and one end of the first spring 11 away from the junction box 2 is fixedly connected to the inner wall of the installation box 1. After the junction box 2 is displaced due to external force, the junction box 2 can be pulled back to the initial position by using its own elastic potential energy, and at the same time, a certain buffering force can be provided when the junction box 2 is dragged. Two first racks 17 are slidably connected in the installation box 1, and two gears 20 are rotatably connected to the installation box 1. The two gears 20 are respectively meshed with the first racks 17. Second racks 18 are fixedly connected on both sides of the junction box 2, and the two second racks 18 are respectively slidably connected in the installation box 1. The second racks 18 are respectively meshed with the two second gears 20. When the second racks 18 slide, the first racks 17 can slide in the opposite direction through the gears 20.

[0034] The driving component is used to prevent animals from dragging the cable 6. The driving component consists of two hooks 5 and two second films 23. The two hooks 5 are respectively fixedly connected to one end of the two first racks 17, and the two second films 23 are respectively arranged at the openings at one end of the two dry powder cylinders 7. In this way, when the cable 6 is dragged, the hooks 5 and the dry powder cylinder 7 will move closer to each other, so that the hooks 5 will pierce the second films 23 on the dry powder cylinder 7.

[0035] In this embodiment, when an animal drags the cable 6, the connector 22 drives the junction box 2 to slide in the installation box 1, thereby causing the dry powder tube 7 on the junction box 2 to move outward, and the second rack 18 drives the first rack 17 through the gear 20 to move the hook 5 toward the dry powder tube 7, thereby puncturing the second film 23 and spraying out the dry powder, which interferes with the animal's vision and causes it to escape, thereby preventing the cable from being further damaged by the animal before the arrival of the staff and minimizing the loss. Embodiment 2

[0036] Different from the first embodiment, Figure 1 - Figure 4 , this embodiment also has the following further contents:

[0037] Two second springs 13 are fixedly connected to the inner wall of the installation box 1, and one end of the two second springs 13 is fixedly connected to a push plate 19. Under normal conditions, the second springs 13 are in a compressed state and store a certain amount of elastic potential energy. A fuse block 21 is fixedly connected between the junction box 2 and the two push plates 19. The fuse block 21 is made of polyphenylene sulfide and has good insulation performance and specific melting point characteristics. Within the normal operating temperature range, the fuse block 21 can maintain the integrity and stability of its structure. Once the temperature exceeds the melting point of the polyphenylene sulfide fuse block 21, the fuse block 21 will quickly melt and break.

[0038] The fire extinguishing assembly is used to extinguish the fire in the junction box 2. The fire extinguishing assembly consists of two cone spikes 14 and two first films 8. The two cone spikes 14 are respectively fixedly connected to two push plates 19. The two first films 8 are respectively arranged at the connection points between the two dry powder cylinders 7 and the junction box 2. In this way, when the push plate 19 drives the cone spikes 14 to move forward, the first films 8 can be punctured.

[0039] In this embodiment, when a short circuit occurs in the cable 6 in the junction box 2 and causes a fire, the high temperature of the flame will melt the fuse block 21, causing the push plate 19 to lose connection with the junction box 2, thereby releasing the rebound force of the second spring 13, causing the second spring 13 to drive the push plate 19 to move forward, causing the cone 14 to pierce the first film 8, thereby causing the dry powder in the dry powder tube 7 to spray out, suppressing and extinguishing the flame in the junction box 2, thereby ensuring that the fire is prevented from spreading further before the arrival of staff, and minimizing the damage to the photovoltaic cable connection point caused by the fire. Embodiment 3

[0040] Reference Figure 2 - Figure 5 , compared with the first embodiment and the second embodiment, in this embodiment:

[0041] The two first racks 17 are respectively fixedly connected with an L-shaped connecting rod 16 at one end away from the hook bar 5, and the two sides of the junction box 2 are respectively fixedly connected with the gas cylinder 10, and the first piston 28 is respectively slidably connected in the two gas cylinders 10. The first piston rod 12 is slidably connected on the two gas cylinders 10, and one end of the two first piston rods 12 is respectively fixedly connected to the two push plates 19, and the other end is respectively fixedly connected to the two first pistons 28. The first piston rod 12 can be pushed by the push plate 19, so that the first piston rod 12 pushes the first piston 28 generates air pressure in the air cylinder 10, and the two air cylinders 10 are respectively connected with piston cylinders 24, and the second pistons 27 are respectively slidably connected in the two piston cylinders 24, and the second piston rods 25 are respectively slidably connected to the two piston cylinders 24. One end of the two second piston rods 25 is fixedly connected to the two second pistons 27, and the other end is fixedly connected to the two pressure blocks 26. In this way, when the pressure generated by the first piston 28 in the air cylinder 10 can make the second piston 27 push the pressure block 26 through the second piston rod 25.

[0042] The alarm component is used to sound an alarm when a fire occurs or an animal drags the cable 6. The alarm component consists of two sleeves 15, two pressure blocks 26 and two trigger alarms 9. The two sleeves 15 are respectively fixedly connected to two L-shaped connecting rods 16. When the first rack 17 slides, the L-shaped connecting rod 16 can drive the sleeve 15 to move, thereby touching the trigger alarm 9 to alarm. The two pressure blocks 26 are respectively slidably connected in the two sleeves 15, and the second piston rod 25 can drive the pressure blocks 26 to slide in and out of the sleeves 15. The two trigger alarms 9 are respectively fixedly installed on the inner wall of the installation box 1.

[0043] In this embodiment, when the cable 6 is dragged by an animal, the second rack 18 drives the first rack 17 to slide through the gear 20, thereby driving the sleeve 15 on the L-shaped connecting rod 16 to move toward the trigger alarm 9 and finally touch the trigger alarm to trigger the alarm, and finally remind the staff to come and drive the animal away in time to prevent the cable 6 from being further damaged. At the same time, when a short circuit or other fault occurs at the connection point and causes a fire, when the high temperature of the fire causes the fuse block 21 to melt, the second spring 13 drives the push plate 19 to move forward, and the push plate 19 drives the first piston 28 on the first piston rod 12 to slide in the cylinder 10, so that the air in the cylinder 10 pushes the second piston 27 in the piston cylinder 24, so that the second piston 27 drives the pressure block 26 to move through the second piston rod 25, so that the pressure block 26 touches the trigger alarm 9 to trigger the alarm, reminding the staff to come and put out the fire in time, ensuring the safe operation of the equipment and the stable transmission of electricity.

[0044] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A photovoltaic cable connection point protection device, characterized in that: It comprises a cable (6), a mounting box (1), a driving component, a fire extinguishing component and an alarm component; A junction box (2) is slidably connected inside the installation box (1), a connector (22) is provided inside the junction box (2), dry powder cartridges (7) are respectively connected to both sides of the junction box (2), two second springs (13) are fixedly connected to the inner wall of the installation box (1), one end of the two second springs (13) are respectively fixedly connected to push plates (19), and two first racks (17) are slidably connected inside the installation box (1); The driving component is used to prevent animals from dragging the cable (6), and the driving component is composed of two hooks (5) and two second films (23), the two hooks (5) are respectively fixedly connected to one end of two first racks (17), and the two second films (23) are respectively arranged at the openings of one end of two dry powder cylinders (7); The fire extinguishing assembly is used to extinguish a fire in a junction box (2), and is composed of two cone spikes (14) and two first films (8), the two cone spikes (14) being respectively fixedly connected to two push plates (19), and the two first films (8) being respectively arranged at the connection points between the two dry powder cartridges (7) and the junction box (2); The alarm assembly is used to sound an alarm when a fire occurs or an animal drags a cable. The alarm assembly is composed of two sleeves (15), two pressure blocks (26) and two trigger alarms (9). The two sleeves (15) are respectively fixedly connected to two L-shaped connecting rods (16), the two pressure blocks (26) are respectively slidably connected in the two sleeves (15), and the two trigger alarms (9) are respectively fixedly mounted on the inner wall of the installation box (1).

2. A photovoltaic cable connection point protection device according to claim 1, characterized in that: A box cover (3) is rotatably connected to the installation box (1), two round holes (4) are provided on the installation box (1), fuse blocks (21) are fixedly connected between the junction box (2) and the two push plates (19), the cable (6) is installed in the connector (22), two gears (20) are rotatably connected to the installation box (1), the two gears (20) are respectively meshed with the first racks (17), and two first springs (11) are fixedly connected to both sides of the junction box (2).

3. A photovoltaic cable connection point protection device according to claim 2, characterized in that: The two sides of the junction box (2) are respectively fixedly connected to second racks (18), the two second racks (18) are respectively slidably connected in the mounting box (1), the ends of the two first racks (17) away from the hook bar (5) are respectively fixedly connected to two L-shaped connecting rods (16), and the two sides of the junction box (2) are respectively fixedly connected to air cylinders (10).

4. A photovoltaic cable connection point protection device according to claim 2, characterized in that: The dry powder cylinder (7) contains dry powder and compressed gas, the first film (8) and the second film (23) are made of stretched polypropylene film, the two hooks (5) are slidably connected to the installation box (1), and the two fuse blocks (21) are made of polyphenylene sulfide.

5. A photovoltaic cable connection point protection device according to claim 3, characterized in that: A first piston (28) is slidably connected in each of the two gas cylinders (10), and a first piston rod (12) is slidably connected to each of the two gas cylinders (10). One end of the two first piston rods (12) is fixedly connected to the two push plates (19) and the other end is fixedly connected to the two first pistons (28). One end of the first spring (11) away from the junction box (2) is fixedly connected to the inner wall of the installation box (1).

6. A photovoltaic cable connection point protection device according to claim 3, characterized in that: The two gas cylinders (10) are respectively connected to piston cylinders (24), the two piston cylinders (24) are respectively slidably connected to second pistons (27), the two piston cylinders (24) are respectively slidably connected to second piston rods (25), one end of the two second piston rods (25) is respectively fixedly connected to the two second pistons (27), and the other end is respectively fixedly connected to the two pressure blocks (26), and the two second racks (18) are respectively meshed and connected to the two second gears (20).

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