Low-voltage power cable for communication base station

Abstract

The invention relates to a low-voltage power cable for a communication base station, which is applied to the related technical field of cables, through the arrangement of sensing units which are in pairwise correspondence, under a normal condition, inclined insertion plates of the sensing units are in an inverted splayed shape, and the sensing units are limited through a non-elastic double-end tensile rope, so that the sensing units are prevented from being damaged. Meanwhile, the two inclined inserting plates which are arranged in the shape of the inverted Chinese character'ba 'are poured and positioned through the hot melting filler, the inclined inserting plates and the double-end tensile rope are matched to achieve the tensile effect at the normal temperature, and the hot melting filler is hot-melted at the abnormal high temperature, so that the compressed hollow ring bags are gradually restored, and the compression effect is achieved. By means of the structure, the limiting rods which are arranged in an inverted splayed mode can be gradually in a regular splayed shape, the non-elastic double-end tensile rope is in a loose state, then limiting is relieved, meanwhile, the two connectors can be bounced off through the hollow annular bag, the effect of automatically disconnecting the cable body is achieved, and compared with the prior art, limiting and self-disconnecting can be achieved at the same time; and potential safety hazards are effectively reduced.

Description

Technical Field

[0001] This invention relates to a low-voltage power cable for communication base stations, and more particularly to a low-voltage power cable for communication base stations applied in the field of cable-related technologies. Background Technology

[0002] As the core infrastructure of modern wireless networks, communication base stations rely heavily on the power supply system for stable operation. Low-voltage cables (usually referring to power cables with a rated voltage of ≤1kV) play a crucial role in power transmission within base stations, primarily connecting auxiliary facilities such as power distribution equipment, battery banks, communication cabinets, and air conditioners.

[0003] Traditional communication base station low-voltage cables mostly use polyvinyl chloride (PVC) or cross-linked polyethylene (XLPE) insulation structures. Although they are inexpensive and easy to lay, power cables are generally connected by plug-in joints. However, although these joints have high connection stability, they have poor tensile strength. When exposed to the outside world, they are easily subjected to accidental pulling, which can cause the joints to loosen and lead to poor contact, affecting the stable transmission of power cables.

[0004] To address the aforementioned issues, limiting components are typically installed, such as the environmentally friendly wear-resistant and tensile-resistant power cable disclosed in Chinese Patent Specification CN106935325B. However, the installation of limiting components leads to poor joint adaptability, and the joint may experience unexpected overheating during cable use, potentially causing a fire in severe cases. To address this issue, automatic joint disconnection is usually implemented, such as the power facility protection monitoring and control system and its usage method disclosed in Chinese Patent Specification CN111769408B. However, with the presence of limiting components, automatic disconnection is difficult in the event of abnormally high temperatures, posing certain safety hazards. Summary of the Invention

[0005] The technical problem that this invention aims to solve in light of the above-mentioned prior art is that cable joints are difficult to simultaneously meet the requirements of tensile strength and abnormal self-disconnection, which poses certain safety hazards.

[0006] To address the aforementioned problems, this invention provides a low-voltage power cable for communication base stations, comprising two cable bodies and two connectors fixedly connected to the two cable bodies respectively. The two connectors are interlocked, and hollow rings are fixedly connected to their adjacent end faces. When the two connectors are connected, the two hollow rings abut against each other and are in a compressed state. At least three monitoring slots are chiseled at the outer end of the connectors, and sensing units are inserted into the monitoring slots. The multiple sensing units on the two connectors correspond to each other in pairs. Each sensing unit includes a pre-melted block and an inclined plate fixedly cast in the pre-melted block. A center slot is chiseled in the middle of the upper part of the inclined plate, and a double-headed tensile rope is provided between two corresponding inclined plates. The two ends of the double-headed tensile rope are respectively clamped between the two center slots.

[0007] In the low-voltage power cable used in the aforementioned communication base station, by setting up two corresponding sensing units, on the one hand, under normal temperature, the two joints can be limited, effectively improving their tensile strength; on the other hand, under abnormal high temperature, the sensing unit will spontaneously change its angle, thereby releasing the limit and realizing automatic disconnection between the two joints. Compared with the existing technology, it simultaneously meets the design requirements of tensile strength and high temperature self-disconnection, thereby effectively reducing safety hazards.

[0008] As a further improvement of this application, the pre-melting block includes an outer shaping shell and a hot-melt filler located inside the outer shaping shell. A reversing rod is movably inserted into the middle of the lower end of the inclined plate, and the two ends of the reversing rod are respectively fixedly connected to the front and rear inner walls of the outer shaping shell.

[0009] As a further improvement of this application, the two corresponding inclined plates on the two connectors are distributed in an inverted V-shape, the cross-section of the monitoring groove is a parallelogram, and the hypotenuse of the parallelogram is parallel to the corresponding inclined plate.

[0010] As a further improvement of this application, multiple sensing units on the same connector are arranged in a ring array, and the included angle between two adjacent sensing units is no greater than 120°. When two of the inclined plates are in contact with the horizontal line at the same time, the connector is above the horizontal plane.

[0011] As a further improvement of this application, a heat-conducting ring is fixedly embedded in the inner wall of the connector. One end of the heat-conducting ring extends to the wiring point inside the two connectors. Two heat-conducting plates are fixedly connected to the outer surface of the other end of the heat-conducting ring. The two heat-conducting plates are fixedly inserted through the connector and extend into the pre-melted block. The inclined plate is located between the two heat-conducting plates. Both the heat-conducting ring and the heat-conducting plates are made of non-conductive high thermal conductivity material.

[0012] As a further improvement of this application, the double-ended tensile rope includes two limiting balls, a non-elastic rope fixed in the middle of one of the limiting balls, and a connecting block fixedly connected to the end of the non-elastic rope. The connecting block is threadedly connected to the other connecting block. When the double-ended tensile rope is engaged with the two inclined plates, the two limiting balls respectively contact the ends of the two inclined plates that are far apart from each other, and the non-elastic rope is in a straight state.

[0013] As another improvement of this application, an anti-accidental contact metal is fixedly connected between the two heat-conducting plates. The anti-accidental contact metal is cut out in the middle of the reversing rod and moves through the middle seam, and the anti-accidental contact metal is in a straight state.

[0014] As a further improvement to this application, the anti-accidental contact metal is made of a hot-melt alloy material, and the hot-melt filler has the same hot-melt temperature as the hot-melt alloy.

[0015] In summary, by setting multiple pairs of corresponding sensing units between the two connectors, when the two connectors are stably connected, multiple sets of inverted V-shaped inclined plates are formed between them. The two inclined plates are squeezed and limited by inelastic double-ended tensile ropes, keeping the two hollow rings in a compressed state. At the same time, the two inverted V-shaped inclined plates are fixed by hot-melt filler. Under normal temperature, the cooperation of the inclined plates and double-ended tensile ropes provides tensile resistance. Under abnormally high temperature, the hot-melt filler melts, causing the compressed hollow rings to gradually recover. This allows the inverted V-shaped limiting rod to gradually form a regular V, slacks the inelastic double-ended tensile ropes, and releases the limiting force. It also causes the two connectors to spring apart, thus achieving the effect of automatically disconnecting the cable body. Compared with existing technologies, this method can simultaneously satisfy limiting and self-disconnection, thereby effectively reducing safety hazards. Attached Figure Description

[0016] Figure 1 This is a perspective view of the first embodiment of this application; Figure 2 This is a side view of the first embodiment of this application; Figure 3 This is a partial front view of the first embodiment of this application; Figure 4 This is a cross-sectional view of the sensing unit portion of the first embodiment of this application; Figure 5 This is a schematic diagram of the double-headed tensile rope according to the first embodiment of this application; Figure 6 This is a schematic diagram illustrating the process of the inclined plate changing from an inverted V-shape to a regular V-shape in the first embodiment of this application. Figure 7 This is a cross-sectional view of the sensing unit portion according to the second embodiment of this application; Figure 8This is a perspective view of the commutator portion according to the first embodiment of this application; Figure 9 This is a schematic diagram illustrating the change process of the inclined plate in the first embodiment of this application as the temperature increases.

[0017] Explanation of the labels in the diagram: 1. Cable body, 2. Connector, 201. Hollow ring, 3. Inclined insert plate, 301. Center groove, 4. Double-headed tensile rope, 41. Limiting ball, 42. Non-elastic rope, 43. Connecting block, 5. Pre-melting block, 6. Reversing rod, 601. Center seam, 71. Heat-conducting ring, 72. Heat-conducting sheet, 73. Anti-accidental contact metal. Detailed Implementation

[0018] The two embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0019] First implementation method: Figure 1 This invention discloses a low-voltage power cable for a communication base station, comprising two cable bodies 1 and two connectors 2 fixedly connected to the two cable bodies 1 respectively. The two connectors 2 are interlocked, and hollow rings 201 are fixedly connected to their adjacent end faces. When the two connectors 2 are connected, the two hollow rings 201 abut against each other and are in a compressed state. When the two hollow rings 201 abut against each other, they can seal the joint of the two connectors 2. At the same time, under abnormally high temperatures, they can also use their own restoring elastic force to push the connectors 2 to both sides, thereby disconnecting the connection between the two cable bodies 1 and effectively avoiding safety hazards.

[0020] like Figure 2 At least three monitoring slots are chiseled at the outer end of connector 2, and sensing units are inserted into the monitoring slots. Multiple sensing units on the two connectors 2 correspond to each other in pairs. Each sensing unit includes a pre-melted block 5 and an inclined plate 3 fixedly cast within the pre-melted block 5. A center groove 301 is chiseled in the middle of the upper end of the inclined plate 3. A double-headed tensile rope 4 is provided between two corresponding inclined plates 3, with both ends of the double-headed tensile rope 4 respectively engaged between two center grooves 301. Figure 3 The two inclined plates 3 on the two connectors 2 are arranged in an inverted V-shape. It is worth noting that when the double-headed anti-tension rope 4 is at the bottom of the two intermediate grooves 301, the two limiting balls 41 are in contact with the two inclined plates 3. Due to the inverted V-shape of the two inclined plates 3 and the lack of elasticity of the double-headed anti-tension rope 4, the double-headed anti-tension rope 4 is restricted on the two inclined plates 3 and is difficult to move radially. When it is accidentally pulled, it can also effectively prevent the two connectors 2 from being pulled apart due to its lack of elasticity, thereby effectively ensuring its tensile strength and thus effectively ensuring the stable transmission of power between the two cable bodies 1.

[0021] like Figure 5The double-headed tensile rope 4 includes two limiting balls 41, a non-elastic rope 42 fixed in the middle of one of the limiting balls 41, and a connecting block 43 fixedly connected to the end of the non-elastic rope 42. The connecting block 43 is threadedly connected to the other connecting block 43. When the double-headed tensile rope 4 is snapped onto the two inclined plates 3, the two limiting balls 41 contact the ends of the two inclined plates 3 that are far apart from each other, and the non-elastic rope 42 is in a straight state. During installation, multiple sensing units can be inserted into the corresponding monitoring slots first. Then, the connecting block 43 can be unscrewed from the corresponding limiting ball 41, and one of the non-elastic ropes 42 can be snapped into a middle slot 301. Then, the connecting block 43 at the end of the non-elastic rope 42 is positioned in another middle slot 301, and the limiting ball 41 is reconnected to the connecting block 43 through the inclined plate 3, so that the double-headed tensile rope 4 and the sensing unit are assembled. Subsequently, tensile and overheat monitoring can be stably performed, and the two cable bodies 1 can be automatically disconnected.

[0022] like Figure 2 Multiple sensing units on the same connector 2 are arranged in a ring array, and the included angle between two adjacent sensing units is no greater than 120°. When two of the inclined plates 3 are in contact with the horizontal line at the same time, the connector 2 is higher than the horizontal plane, which effectively ensures that no matter what angle the cable is placed at, two of the inclined plates 3 can touch the ground at the same time, and the connector 2 does not contact the ground, so that its surroundings can be fully in contact with the air. Under the action of the ambient wind, it can maintain the air convection on its surface, accelerate heat dissipation, and reduce excessive heat accumulation.

[0023] like Figure 4 The pre-melting block 5 includes an outer shaping shell and a hot-melt filler located inside the outer shaping shell. The hot-melt temperature of the hot-melt filler can be selectively set according to the actual cable type, and this hot-melt temperature is 3-5℃ higher than the safe operating temperature limit. This ensures that the self-disconnection operation will only occur after an abnormality is clearly detected, making it less likely to be falsely triggered. This ensures stable power transmission and prevents frequent power outages due to lack of triggering. A reversing rod 6 is movably inserted into the middle of the lower end of the inclined plate 3. The two ends of the reversing rod 6 are fixedly connected to the front and rear inner walls of the outer shaping shell, respectively. The monitoring slot has a parallelogram cross-section, and the hypotenuse of the parallelogram is parallel to the corresponding inclined plate 3. This makes the two monitoring slots on the two connectors 2 tilted to both sides, making it difficult for the two sensing units to detach from the detection slots under the suppression of the double-headed anti-tension rope 4. This effectively ensures the stability of the connection between the sensing unit and the connector 2.

[0024] It is worth noting that a torsion spring can also be selectively installed between the reversing rod 6 and the pre-melting block 5, so that after the hot melt filler is hot melted at high temperature, the inclined plate 3 can rotate spontaneously, so that the corresponding two inclined plates 3 can stably complete the conversion from an inverted V-shape to a regular V-shape, thereby releasing the restriction on the two joints 2 and facilitating self-disconnection in case of abnormal high temperature.

[0025] A heat-conducting ring 71 is fixedly embedded in the inner wall of the connector 2. One end of the heat-conducting ring 71 extends to the wiring point inside the two connectors 2. Two heat-conducting plates 72 are fixedly connected to the outer surface of the other end of the heat-conducting ring 71. The two heat-conducting plates 72 are fixedly inserted through the connector 2 and extend into the pre-melting block 5. The inclined plate 3 is located between the two heat-conducting plates 72. The heat-conducting ring 71 and the heat-conducting plates 72 are both made of non-conductive high thermal conductivity materials. The heat-conducting ring 71 and the heat-conducting plates 72 can effectively transfer the heat at the conductor inside the connector 2 to the hot melt filler, thereby effectively ensuring that the hot melt filler has a faster thermal response speed and a faster self-disconnection speed when the temperature is abnormally high, which greatly reduces the accident rate such as spontaneous combustion caused by cable overheating.

[0026] In summary, by setting multiple sets of paired sensing units between the two connectors 2, when the two connectors 2 are stably connected, multiple sets of inverted V-shaped inclined plates 3 are formed between them. The two inclined plates 3 are compressed and limited by inelastic double-headed tensile ropes 4, keeping the two hollow annular cells 201 in a compressed state. Simultaneously, the two inverted V-shaped inclined plates 3 are fixed by hot-melt filler casting. Under normal temperatures, the cooperation of the inclined plates 3 and the double-headed tensile ropes 4 provides tensile resistance. However, at abnormally high temperatures, the hot-melt filler melts, causing the compressed hollow annular cells 201 to gradually recover. Figure 6 This design can gradually turn the inverted V-shaped limit rod into a regular V-shape, causing the inelastic double-headed tensile rope 4 to relax and thus release the limit. At the same time, it can also spring the two joints 2 apart, thereby achieving the effect of automatically disconnecting the cable body 1. Compared with existing technologies, it can simultaneously meet the design requirements of tensile strength and high-temperature self-disconnection, thereby effectively reducing safety hazards.

[0027] Second implementation method: This embodiment adds an anti-accidental contact metal 73 to the first embodiment, while the rest remains the same as the first embodiment.

[0028] Figure 7-8 As shown, an anti-accidental contact metal 73 is fixedly connected between the two heat-conducting plates 72. A 602 is cut out in the middle of the reversing rod 6. The anti-accidental contact metal 73 moves through the central seam 601 and is in a straight state. It is worth noting that the surface of the anti-accidental contact metal 73 is covered with a flexible heat insulation layer. Both ends of the anti-accidental contact metal 73 are fixedly extended into the interior of the heat-conducting plate 72 to reduce the impact of ambient temperature on the anti-accidental contact metal 73. The main reason for its deformation is the heat generated by the conductor at the joint. The setting of the anti-accidental contact metal 73 can act as a safety device to prevent accidental triggering. When the hot melt filler is locally overheated and melts, causing it to loosen, the inclined plate 3 is not easy to rotate under the restriction of the anti-accidental contact metal 73, thereby effectively avoiding frequent power outages and ensuring stable power transmission.

[0029] The anti-accidental contact metal 73 is made of a hot-melt alloy material. The hot-melt filler and the hot-melt alloy have the same hot-melt softening temperature. When the heat generated by the conductor inside the joint is transferred along the heat-conducting ring 71 and the heat-conducting plate 72 to the anti-accidental contact metal 73, such as... Figure 9 When the temperature reaches the heat melting temperature, the anti-mis-touch metal 73 gradually softens, thereby gradually reducing its limiting force on the reversing rod 6. Only then will the inclined plate 3 deflect, realizing the self-disconnection operation of the two cable bodies 1. Compared with the first implementation method, the self-disconnection operation is more accurate and the false trigger rate is lower.

[0030] In light of the current practical needs, the above-described embodiments adopted in this application are not limited to this scope of protection. Any changes made within the knowledge of those skilled in the art without departing from the concept of this application still fall within the protection scope of this invention.

Claims

1. A low-voltage power cable for a communication base station, characterized in that: It includes two cable bodies (1) and two connectors (2) fixedly connected to the two cable bodies (1) respectively. The two connectors (2) are inserted into each other, and hollow rings (201) are fixedly connected to the end faces of the two connectors that are close to each other. When the two connectors (2) are connected, the two hollow rings (201) abut against each other and are in a compressed state. At least three monitoring slots are chiseled at the outer end of the connector (2). Sensing units are inserted in the monitoring slots. Multiple sensing units on the two connectors (2) correspond to each other. The sensing unit includes a pre-melted block (5) and a slanted plate (3) fixedly cast in the pre-melted block (5). A center slot (301) is chiseled in the middle of the upper end of the slanted plate (3). A double-headed tensile rope (4) is provided between the two corresponding slanted plates (3). The two ends of the double-headed tensile rope (4) are respectively clamped between the two center slots (301).

2. The low-voltage power cable for a communication base station according to claim 1, characterized in that: The pre-melted block (5) includes an outer shaping shell and a hot melt filler located inside the outer shaping shell. A reversing rod (6) is movably inserted into the middle of the lower end of the inclined plate (3). The two ends of the reversing rod (6) are respectively fixedly connected to the front and rear inner walls of the outer shaping shell.

3. The low-voltage power cable for a communication base station according to claim 2, characterized in that: The two oblique plates (3) on the two connectors (2) are distributed in an inverted V-shape. The cross-section of the monitoring groove is a parallelogram, and the hypotenuse of the parallelogram is parallel to the corresponding oblique plate (3).

4. The low-voltage power cable for a communication base station according to claim 3, characterized in that: Multiple sensing units on the same connector (2) are arranged in a ring array, and the included angle between two adjacent sensing units is no greater than 120°. When two of the inclined plates (3) are in contact with the horizontal line at the same time, the connector (2) is higher than the horizontal plane.

5. A low-voltage power cable for a communication base station according to claim 4, characterized in that: A heat-conducting ring (71) is fixedly embedded in the inner wall of the connector (2). One end of the heat-conducting ring (71) extends to the wiring point inside the two connectors (2). Two heat-conducting plates (72) are fixedly connected to the outer surface of the other end of the heat-conducting ring (71). The two heat-conducting plates (72) are fixedly inserted through the connector (2) and extend into the pre-melted block (5). The inclined plate (3) is located between the two heat-conducting plates (72). The heat-conducting ring (71) and the heat-conducting plates (72) are both made of non-conductive high thermal conductivity materials.

6. A low-voltage power cable for a communication base station according to claim 5, characterized in that: The double-headed anti-tension rope (4) includes two limiting balls (41), a non-elastic rope (42) fixed in the middle of one of the limiting balls (41), and a connecting block (43) fixedly connected to the end of the non-elastic rope (42). The connecting block (43) is threadedly connected to the other connecting block (43). When the double-headed anti-tension rope (4) is snapped onto the two inclined plates (3), the two limiting balls (41) respectively contact the ends of the two inclined plates (3) that are far apart from each other, and the non-elastic rope (42) is in a straight state.

7. A low-voltage power cable for a communication base station according to claim 5, characterized in that: An anti-accidental contact metal (73) is fixedly connected between the two heat-conducting plates (72). A (602) is cut in the middle of the reversing rod (6). The anti-accidental contact metal (73) moves through the middle seam (601) and is in a straight state.

8. A low-voltage power cable for a communication base station according to claim 7, characterized in that: The anti-accidental contact metal (73) is made of hot melt alloy material, and the hot melt temperature of the hot melt filler and the hot melt alloy are the same.

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