Anti-loosening photovoltaic junction box

Abstract

The invention belongs to the technical field of photovoltaic junction boxes, and mainly relates to an anti-loosening photovoltaic junction box. Comprising a box body, the box body is detachably provided with a box cover and a box bottom, the box body is provided with a cable, and the box body is provided with a buffer mechanism; the buffer mechanism comprises a shell, the shell is fixedly connected to the box body, the cable penetrates through the shell, the shell is detachably provided with a shell cover, the shell is rotationally connected with a buffer part, the cable is wound on the buffer part, and a torsional spring is arranged between the buffer part and the shell. When the cable is pulled, the cable drives the buffer part to rotate, the buffer part enables the adjacent torsional springs to store force, so that pulling of the cable is buffered, instantaneous pulling force of the cable is reduced, meanwhile, the non-pulled side of the cable is released from the buffer part, and the cable is prevented from being damaged. Therefore, the probability that the connection part of the cable and the box body is pulled is further reduced, and the anti-loosening performance of the device is improved.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic junction box technology, and in particular to an anti-loosening photovoltaic junction box. Background Technology

[0002] Photovoltaic junction boxes are key components of solar photovoltaic systems, primarily used to connect, protect, and optimize the electrical output of photovoltaic modules. The main parts of a photovoltaic junction box include a housing, connection terminals, bypass diodes, and cable connectors. The housing is made of insulating material, balancing mechanical strength and weather resistance. The connection terminals are made of highly conductive tin-plated copper to reduce contact resistance and prevent oxidation. The bypass diodes are typically Schottky diodes with low forward voltage drop to reduce losses. The cable connectors are waterproof, using silicone sealing rings or potting compound to ensure long-term sealing.

[0003] During the use of photovoltaic junction boxes, we found that existing photovoltaic junction boxes are attached to photovoltaic panels using silicone, leaving both the junction box and its cables exposed. This leads to the following problems: because the cables are exposed, they are easily pulled by external forces, such as accidental touches by workers or birds landing on the cables. Prolonged pulling of the cables can cause the connection between the cables and the junction box to loosen.

[0004] Based on this, the researchers proposed an anti-loosening photovoltaic junction box. Summary of the Invention

[0005] In order to overcome the shortcomings mentioned in the background art, the present invention provides an anti-loosening photovoltaic junction box.

[0006] The technical solution of the present invention is as follows: a photovoltaic junction box with anti-loosening features, comprising a box body, a box cover and a box bottom detachably mounted on the box body, a cable disposed on the box body, and a buffer mechanism disposed on the box body; the buffer mechanism comprises a housing, the housing being fixedly connected to the box body, the cable passing through the housing, a cover being detachably mounted on the housing, a buffer member being rotatably connected to the housing, the cable being wound around the buffer member, and a torsion spring being disposed between the buffer member and the housing.

[0007] Furthermore, the buffer is slidably connected to symmetrically distributed clamping members, which are used to clamp the cable.

[0008] Furthermore, the buffer is slidably connected to symmetrically distributed pressure members, and a first spring is provided between the pressure member and the adjacent clamping member. The cover is fixedly connected to circumferentially evenly distributed extrusion members, and the pressure member is rotatably connected to a first roller. The extrusion member is used to push the adjacent first roller to move.

[0009] Furthermore, the housing is slidably connected to a sliding cylinder, the cable passes through the sliding cylinder, and a second spring is provided between the sliding cylinder and the housing.

[0010] Furthermore, the sliding cylinder is fixed with mounting blocks that are evenly distributed circumferentially, and a second roller is rotatably connected between two adjacent mounting blocks. The second roller is used to reduce wear on the cable.

[0011] Furthermore, the buffer is fixedly connected to a fixing plate, the fixing plate is fixedly connected to an elastic rod, the elastic rod is fixedly connected to an impact ball, and the housing is fixedly connected to spaced sound-emitting elements, the impact ball striking the sound-emitting elements to produce sound.

[0012] Furthermore, a first vibration plate is fixedly connected to the box body, and a second vibration plate is fixedly connected to the first vibration plate.

[0013] Furthermore, the box body is provided with several protrusions to increase the contact area between the box body and the silicone.

[0014] Furthermore, the clamping member is provided with barbs facing the sliding cylinder.

[0015] Furthermore, the line connecting the circumferentially evenly distributed tips of the extruders coincides with the axis of symmetry of the two clamping members.

[0016] The present invention has the following advantages: When the cable is pulled, the cable drives the buffer to rotate, and the buffer causes the adjacent torsion spring to store force, thereby buffering the pull on the cable and reducing the instantaneous tension on the cable. At the same time, the side of the cable that is not being pulled is released from the buffer, thereby further reducing the probability of the connection between the cable and the box being pulled, and thus improving the anti-loosening performance of the device.

[0017] The cable is clamped by the clamping component to prevent the cable from sliding relative to the buffer component when the buffer component rotates too much. When the buffer component rotates more than 90°, the squeezing component squeezes the first roller. The first roller further presses the adjacent first spring through the pressure applying component, thereby increasing the clamping force of the clamping component on the cable.

[0018] When the cable bends, it squeezes the sliding cylinder, and the position of the sliding cylinder changes according to the different pressures it receives, thereby changing the location where the cable bends, expanding the range of possible bending locations, and reducing the damage caused by the cable bending in the same position for a long time. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the box body and box bottom of the present invention; Figure 3 This is a three-dimensional structural cross-sectional view of the box body and box lid of the present invention; Figure 4 This is a three-dimensional structural diagram of the clamping member and the pressure-applying member of the present invention; Figure 5 This is a three-dimensional structural diagram of the shell cover and the extruded component of the present invention; Figure 6 This is a three-dimensional structural diagram of the mounting block and the second roller of the present invention; Figure 7 This is a three-dimensional structural diagram of the fixing plate and elastic rod of the present invention.

[0020] The components in the attached diagram are labeled as follows: 1-box body, 2-box cover, 3-box bottom, 4-cable, 5-shell, 6-shell cover, 7-buffer, 8-clamping component, 9-pressure application component, 10-squeezing component, 11-first roller, 12-sliding cylinder, 13-mounting block, 14-second roller, 15-fixed plate, 16-elastic rod, 17-impact ball, 18-sound-generating component, 19-first vibrating plate, 20-second vibrating plate, 21-protrusion. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Example 1 This embodiment discloses an anti-loosening photovoltaic junction box for connecting, protecting, and optimizing the electrical output of photovoltaic modules.

[0023] like Figures 1-4As shown, the device includes a housing 1, a cover 2 detachably mounted on the upper side of the housing 1, and a bottom 3 detachably mounted on the lower side of the housing 1. A wiring terminal and a bypass diode are installed inside the housing 1. A cable 4 is installed on the right side of the housing 1 and is electrically connected to the wiring terminal. The housing 1 is equipped with a buffer mechanism to buffer the tensile force on the cable 4, preventing the tensile force on the cable 4 from acting on the connection between the cable 4 and the housing 1, thus ensuring the normal operation of the device. The buffer mechanism includes a housing 5, which is fixed to the right side of the housing 1. The cable 4 passes through the housing 5. A cover 6 is detachably mounted on the upper side of the housing 5. A buffer element 7 is rotatably connected inside the housing 5. The buffer element 7 is a cylinder with a cross-shaped groove. One groove in the cross-shaped groove penetrates the buffer element 7, while the other does not. The cable 4 is wound around the buffer element 7 and passes through the groove penetrating the buffer element 7, so that when the cable 4 is pulled, it will cause the buffer element 7 to rotate. A torsion spring is installed between the buffer element 7 and the housing 5.

[0024] The working process of this embodiment is as follows: First, install the box body 1 and the box bottom 3 together. Then, apply silicone to the lower edge of the box body 1. Next, pass the electrode on the photovoltaic panel through the box bottom 3 into the box body 1 and stick the box body 1 to the photovoltaic panel. Then, connect the electrode of the photovoltaic panel to the wiring terminal in this device. After the connection is completed, fill the box body 1 with silicone. Then, connect the box cover 2 to the box body 1. When the cable 4 is pulled, the cable 4 drives the buffer 7 to rotate. The buffer 7 causes the adjacent torsion spring to store force, thereby buffering the pull on the cable 4 and reducing the pull at the connection between the cable 4 and the box body 1.

[0025] Example 2 This embodiment discloses an anti-loosening photovoltaic junction box, which, based on Embodiment 1, also has the function of further clamping the cable 4.

[0026] like Figure 4 As shown, the buffer 7 is slidably connected to two symmetrically distributed clamping members 8. The clamping members 8 are located in the grooves that do not penetrate the buffer 7. The clamping members 8 are used to clamp the cable 4, so that the cable 4 will not slide in the grooves of the buffer 7.

[0027] like Figure 4 and Figure 5As shown, the buffer 7 is slidably connected to two symmetrically distributed pressure members 9. A first spring is provided between the pressure member 9 and the adjacent clamping member 8. The first spring is initially in a compressed state, thereby applying elastic force to the clamping member 8, so that the clamping member 8 clamps the cable 4. Two circumferentially evenly distributed extrusion members 10 are fixedly connected to the lower side of the cover 6. The extrusion members 10 are pawl-shaped and have a pointed side and a wide side. The curved surface of the inner side of the extrusion member 10 gradually approaches the center of the cover 6 from the pointed side to the wide side. A first roller 11 is rotatably connected to the upper side of the pressure member 9. The extrusion member 10 is used to push the adjacent first roller 11 to move.

[0028] The working process of this embodiment follows that of Embodiment 1, and is described in detail as follows: After the buffer 7 rotates 90°, the buffer 7 drives the first roller 11 to rotate until it contacts the adjacent squeezing member 10 through the pressure member 9. At this time, the buffer 7 continues to rotate, and the first roller 11 is gradually squeezed by the squeezing member 10. The first roller 11 moves towards the center of the buffer 7 and compresses the adjacent first spring, thereby increasing the elastic force of the first spring on the clamping member 8, so as to improve the clamping force of the two clamping members 8 on the cable 4 and further reduce the probability of the connection between the cable 4 and the box 1 being pulled.

[0029] Example 3 This embodiment discloses an anti-loosening photovoltaic junction box, which is a further improvement on Embodiment 1.

[0030] like Figure 6 As shown, a sliding cylinder 12 is slidably connected to the right side of the housing 5. The cable 4 passes through the sliding cylinder 12. The sliding cylinder 12 is used to change the bending position of the cable 4, thereby expanding the range of the bending point of the cable 4 and preventing the cable 4 from bending in the same place for a long time. A second spring is provided between the sliding cylinder 12 and the housing 5.

[0031] like Figure 6 As shown, five mounting blocks 13 are fixedly connected to the right side of the sliding cylinder 12, which are evenly distributed in the circumference. A second roller 14 is rotatably connected between two adjacent mounting blocks 13. The second roller 14 is used to reduce the wear of the cable 4. When the cable 4 is pulled and moves, the cable 4 will drive the adjacent second roller 14 to rotate, avoiding the second roller 14 from directly rubbing against the sliding cylinder 12 and reducing the friction loss of the cable 4.

[0032] Example 4 This embodiment discloses an anti-loosening photovoltaic junction box, which is a further improvement on embodiment 2.

[0033] like Figure 7As shown, a fixed plate 15 is fixedly connected to the lower side of the buffer 7, and an elastic rod 16 is fixedly connected to the left side of the fixed plate 15. When the impact ball 17 is blocked by the adjacent sound-emitting element 18, the elastic rod 16 bends and stores force. When the impact ball 17 can pass the adjacent sound-emitting element 18, the elastic rod 16 releases its elastic force and returns to its original shape, while driving the impact ball 17 to move quickly and hit the next sound-emitting element 18, causing the sound-emitting element 18 to suddenly make a sound and scatter birds. The impact ball 17 is fixedly connected to the left side of the elastic rod 16, and the shell 5 is fixedly connected to the spaced sound-emitting elements 18. The impact ball 17 strikes the sound-emitting element 18 to make a sound.

[0034] The working process of this embodiment follows that of embodiment 2, and is described in detail as follows: When a bird lands on cable 4, the cable 4 is pulled, causing the buffer 7 to rotate. The buffer 7 drives the elastic rod 16 to rotate through the fixed plate 15. The elastic rod 16 drives the impact ball 17 to rotate, causing the impact ball 17 to strike the sound-emitting component 18 and make a sound, thereby driving away the bird.

[0035] Example 5 This embodiment discloses an anti-loosening photovoltaic junction box, which improves the filling degree of silicone potting based on Embodiment 1.

[0036] like Figure 3 As shown, two symmetrically distributed first vibration plates 19 are fixed inside the box body 1. The first vibration plates 19 are located near the gaps inside the box body 1 where it is not easy to pour silicone. The first vibration plates 19 are fixed to the second vibration plates 20. Both the first vibration plates 19 and the second vibration plates 20 have a certain degree of elasticity and are made of materials with high vibration frequency, such as steel sheets. When the second vibration plate 20 is moved, the second vibration plate 20 drives the first vibration plate 19 to vibrate.

[0037] The working process of this embodiment follows that of Embodiment 1, and is described in detail as follows: After filling the box 1 with silicone, the second vibrating plate 20 is moved, causing the second vibrating plate 20 to deform and causing the first vibrating plate 19 to deform. Then the second vibrating plate 20 is released, causing the second vibrating plate 20 and the first vibrating plate 19 to vibrate, so that the silicone flows into the unfilled gaps under the action of vibration, thereby improving the sealing effect of the silicone.

[0038] Example 6 This embodiment discloses an anti-loosening photovoltaic junction box, which improves the firmness of the box body 1 adhering to the photovoltaic panel based on Embodiment 1.

[0039] like Figure 2 As shown, the lower side of the box 1 is provided with several protrusions 21, which are used to increase the contact area between the box 1 and the silicone, and at the same time prevent the box 1 from squeezing out all the silicone between the box and the photovoltaic panel when the box 1 is pressed hard.

[0040] Example 7 This embodiment discloses an anti-loosening photovoltaic junction box, which provides further improvements based on Embodiment 2.

[0041] like Figure 5 and Figure 7 As shown, the clamping member 8 is provided with barbs facing the sliding cylinder 12, so that the part of the cable 4 located in the groove experiences greater resistance when sliding to the left and less resistance when sliding to the right. When the cable 4 drives the buffer member 7 to rotate, the non-pulled side of the cable 4 (i.e., the part of the cable 4 located on the left side of the buffer member 7) relaxes. After the cable 4 drives the buffer member 7 to rotate more than 90° and the cable 4 slides, the non-pulled side of the cable 4 enters the groove of the buffer member 7. Then, during the reset process of the buffer member 7, if the buffer member 7 has not completed the reset, the non-pulled side of the cable 4 will tighten. The buffer member 7 continues to rotate and reset. At this time, the tension of the part of the cable 4 located on the right side of the buffer member 7 disappears, and the resistance of the clamping member 8 to the right movement of the cable 4 is small. Therefore, the part of the cable 4 located in the groove of the buffer member 7 slides to the right relative to the buffer member 7, so that the relative position of the cable 4 and the buffer member 7 is reset.

[0042] like Figure 4 and Figure 5 As shown, the line connecting the pointed sides of the circumferentially evenly distributed extrusion members 10 coincides with the axis of symmetry of the two clamping members 8, thereby increasing the clamping force of the clamping members 8 on the cable 4 after the buffer member 7 rotates 90°.

[0043] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A photovoltaic junction box with anti-loosening feature, comprising a box body (1), wherein the box body (1) is detachably fitted with a box cover (2) and a box bottom (3), and wherein the box body (1) is provided with cables (4), characterized in that, The box body (1) is provided with a buffer mechanism; The buffer mechanism includes a housing (5), which is fixed to the box (1). The cable (4) passes through the housing (5). The housing (5) is detachably fitted with a cover (6). The housing (5) is rotatably connected to a buffer member (7). The cable (4) is wound around the buffer member (7). A torsion spring is provided between the buffer member (7) and the housing (5).

2. A photovoltaic junction box with anti-loosening feature as described in claim 1, characterized in that, The buffer (7) is slidably connected to symmetrically distributed clamping members (8), which are used to clamp the cable (4).

3. A photovoltaic junction box with anti-loosening feature as described in claim 2, characterized in that, The buffer (7) is slidably connected to symmetrically distributed pressure members (9), and a first spring is provided between the pressure member (9) and the adjacent clamping member (8). The cover (6) is fixedly connected to circumferentially distributed extrusion members (10), and the pressure member (9) is rotatably connected to a first roller (11). The extrusion member (10) is used to push the adjacent first roller (11) to move.

4. A photovoltaic junction box with anti-loosening feature as described in claim 1, characterized in that, The housing (5) is slidably connected to a sliding cylinder (12), the cable (4) passes through the sliding cylinder (12), and a second spring is provided between the sliding cylinder (12) and the housing (5).

5. A photovoltaic junction box with anti-loosening feature according to claim 4, characterized in that, The sliding cylinder (12) is fixed with mounting blocks (13) that are evenly distributed in the circumference. A second roller (14) is rotatably connected between two adjacent mounting blocks (13). The second roller (14) is used to reduce the wear of the cable (4).

6. A photovoltaic junction box with anti-loosening feature according to claim 1, characterized in that, The buffer (7) is fixedly connected to a fixing plate (15), the fixing plate (15) is fixedly connected to an elastic rod (16), the elastic rod (16) is fixedly connected to an impact ball (17), the housing (5) is fixedly connected to spaced sound-emitting elements (18), and the impact ball (17) strikes the sound-emitting element (18) to produce sound.

7. A photovoltaic junction box with anti-loosening feature according to claim 1, characterized in that, The box body (1) is fixedly connected to a first vibration plate (19), and the first vibration plate (19) is fixedly connected to a second vibration plate (20).

8. A photovoltaic junction box with anti-loosening feature according to claim 1, characterized in that, The box body (1) is provided with several protrusions (21) to increase the contact area between the box body (1) and the silicone.

9. A photovoltaic junction box with anti-loosening feature according to claim 2, characterized in that, The clamping member (8) is provided with barbs facing the sliding cylinder (12).

10. A photovoltaic junction box with anti-loosening feature according to claim 3, characterized in that, The line connecting the pointed sides of the circumferentially evenly distributed extruder (10) coincides with the axis of symmetry of the two clamping members (8).

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