An intelligent low-voltage cable branch box

Abstract

The present invention provides an intelligent low-voltage cable distribution box, belonging to the technical field of cable distribution boxes. The invention includes a box body, and also includes: a drying and sealing assembly, an adaptive air supplementing assembly, and a dehumidifying assembly; through the pushing of U-shaped jaws and the inflation of an annular airbag, a tight seal between the cable and the distribution box is achieved, and at the same time, it can automatically sense and cope with the problem of the decline in sealing performance caused by changes in external temperature or humidity. By automatically moving the piston upward to push gas into the movable cavity and the annular airbag, automatic air supplement is realized, enhancing the reliability of the sealing device; and it can automatically sense the change of moisture on the surface of the cable, and through the coordinated action of the suction and exhaust of the piston, the moisture is effectively collected and discharged. At the same time, the drying part is heated by an electric heating block to achieve comprehensive dehumidification treatment, without the need to frequently replace desiccants, reducing the maintenance cost; through the dual guarantees of efficient sealing and intelligent dehumidification, the risk of electrical faults of the cable is reduced, and the service life of the cable and the distribution box is extended.

Description

Technical Field

[0001] The present invention relates to the technical field of cable distribution boxes, and more particularly to an intelligent low-voltage cable distribution box. Background Art

[0002] The cable distribution box is used for cable branching. The main functions of the cable distribution box are to tap or transfer cables, mainly playing the roles of cable tapping and cable transferring. With the rapid development of the modernization drive of the power industry, the grid transformation has been fully launched. When multi-loop branch power distribution needs to be realized at a certain distance for the underground main cable, using a cable distribution box as an important supporting equipment for power distribution is an economical, convenient and safe method. Compared with the traditional distribution box, the cable distribution box greatly saves land, is easy to install, convenient for maintenance and expansion, does not require above-ground infrastructure, greatly reduces infrastructure investment, reduces resource waste, saves project cost, and beautifies the railway environment.

[0003] Cables usually enter the distribution box through cable holes. Since the cable holes and reserved holes are usually located at the bottom of the distribution box, this allows water vapor to enter the box from bottom to top, becoming the main invasion path of humid air. Especially in low-lying areas or areas with a high groundwater level, this invasion is more serious. The prior art usually seals the cable holes with seals. However, when the external humidity is high and the temperature is low, the performance of the seals will decline. When the cable holes are not tightly sealed, external humid air easily enters the interior of the distribution box. Under large temperature differences, condensation is extremely likely to form, which not only reduces the insulation performance of the equipment but also may cause short circuits and other electrical faults; secondly, if desiccants are used to dry the cable holes of the box body, although it is simple and feasible, it needs to be replaced frequently, especially in an environment with high humidity, which increases the labor cost and time for maintenance.

[0004] How to invent an intelligent low-voltage cable distribution box to solve these problems has become an urgent problem to be solved by those skilled in the art. Summary of the Invention

[0005] To make up for the above deficiencies, the present invention provides an intelligent low-voltage cable distribution box, aiming to solve the problems mentioned in the above background.

[0006] The present invention is implemented as follows:

[0007] The present invention provides an intelligent low-voltage cable branch box, which includes a box body. An installation plate is installed inside the box body. A plurality of sleeves are installed on the installation plate. A T-shaped plug is installed at the end of the sleeve. A stress cone and a cable crimping terminal are arranged inside the T-shaped plug. A lightning arrester is installed at the rear side of the T-shaped plug. A rubber cap is sleeved at the end of the lightning arrester. A bottom plate is installed at the bottom of the box body. An outlet hole, an inlet hole and a cable fixing bracket are arranged on the bottom plate. A clamping hoop for fixing the cable is installed on the cable fixing bracket. A conical connection cylinder is installed on the bottom plate corresponding to the outlet hole and the inlet hole. It further includes:

[0008] A drying and sealing assembly: The drying and sealing assembly is arranged inside the conical connection cylinder. The drying and sealing assembly is used to maintain the seal between the cable and the outlet hole and the inlet hole, and at the same time dry the external humid air at the bottom of the bottom plate;

[0009] An adaptive air supplementing assembly: The adaptive air supplementing assembly is arranged inside the drying and sealing assembly. The adaptive air supplementing assembly can enhance the sealing effect of the drying and sealing assembly when the external temperature is low;

[0010] A dehumidifying assembly: The dehumidifying assembly is arranged on the drying and sealing assembly. The dehumidifying assembly dehumidifies the drying and sealing assembly according to the state of the adaptive air supplementing assembly.

[0011] Preferably, the drying and sealing assembly includes a wire cylinder, a connecting rod, an annular airbag and a U-shaped claw. The wire cylinder is snap-fitted on the conical connection cylinder. The annular airbag is fixedly installed inside the wire cylinder. A plurality of movable cavities are arranged inside the wire cylinder. A connecting spring is installed inside the movable cavity. The lower end of the connecting spring is fixedly connected to the top of the connecting rod. The U-shaped claw is fixedly connected to the bottom end of the connecting rod. A drying part is arranged at the upper end inside the U-shaped claw.

[0012] Preferably, a second channel is provided for communication between the bottom wall of the annular airbag and the movable cavity. The number of U-shaped claws in a single wire cylinder is two and they are symmetrically arranged left and right along the central axis of the wire cylinder. The movable cavities and the connecting rods are annularly and equidistantly distributed along the central axis of the wire cylinder.

[0013] Preferably, the drying parts are equidistantly distributed along the inner edge of the U-shaped claw. The drying parts are convex arc-shaped pieces and are elastic. The drying parts are made of a high molecular permeable membrane material. The annular airbag is made of TPU material.

[0014] Preferably, the upper end of the connecting rod is located inside the movable cavity when the connecting spring is in the initial state. The connecting rod is slidably and sealingly connected to the movable cavity.

[0015] Preferably, the adaptive air replenishing component includes an air guide cavity arranged in the connecting rod, the upper end of the air guide cavity is penetrated through the top wall thereof to provide a first channel, the lower end of the air guide cavity is penetrated through the lower side wall of the connecting rod, a piston is slidably arranged in the air guide cavity, and a magnetic cylinder is fixedly installed in the lower port of the air guide cavity.

[0016] Preferably, a magnetic block is provided at the lower end of the piston, and the opposing surfaces of the magnetic block and the magnetic cylinder are magnetically arranged with the same polarity. The piston is slidingly and sealingly connected to the air guide cavity. The piston is located in the middle of the air guide cavity at normal temperature, and the lower end of the magnetic block matches the inner cavity of the magnetic cylinder.

[0017] Preferably, the adaptive air replenishment component also includes a condensation chamber and a drainage channel arranged in the U-shaped clamp, and the ends of the drainage channel respectively penetrate the bottom wall of the condensation chamber and the outer wall of the U-shaped clamp, and the drainage channel is arranged with a large upper port and a small lower port, and the air guide chamber located on the lower side of the piston is connected to the condensation chamber.

[0018] Preferably, the dehumidification component includes a mounting groove, a conductive column and a conductive tube. The mounting groove is located at the upper end of the wire tube and an electric heating block is installed inside it. The electric heating block is annular and is arranged around the annular airbag. The conductive column is located at the upper end of the piston, and the conductive tube is located at the lower end of the first channel.

[0019] Preferably, the input end of the electric heating block is electrically connected to an external power supply, the wire tube is made of a high thermal conductivity material, an inner groove matching the first channel is provided through the inside of the conductive tube, the conductive tube, the conductive column and the electric heating block are electrically connected, and the end of the conductive column matches the inner groove of the conductive tube.

[0020] The beneficial effects of the present invention are:

[0021] When the cable passes through the branch box, the U-shaped clamp is pushed to compress the gas in the active cavity, automatically inflating the annular airbag so that it fits tightly to the cable surface, forming an effective sealing barrier to isolate external humid air and dust; when the external humidity increases or the temperature changes, causing the sealing performance to decrease, the gas is automatically pushed into the active cavity and the annular airbag through the upward movement of the piston, achieving automatic air replenishment and maintaining a tightly sealed state. This automatic air replenishment mechanism effectively addresses the problem of reduced sealing performance due to changes in external temperature or humidity, and significantly enhances the stability and reliability of the sealing device under different environmental conditions.

[0022] When the external humidity increases, the moisture on the surface of the cable is first adsorbed by the drying part. As the moisture accumulates, the change in gas pressure in the condensate cavity triggers the upward movement of the piston, forming a negative pressure. This not only realizes the preliminary drying of the drying part but also effectively collects the moisture in the condensate cavity. At the same time, it reflects the external moisture change to the inside of the air guide cavity and the movable cavity, enabling the entire system to timely sense and respond to the humidity change. The piston continues to move upward to trigger the heating of the gas in the heating block chamber by the electric heating element. The expanded gas pushes the piston downward to discharge the moisture and further dry the drying part, achieving a comprehensive dehumidification process. Through the coordinated actions of the piston's suction and exhaust, not only is the automation degree of the dehumidification component enhanced, but also the drying efficiency of the drying part is improved, and there is no need to replace the desiccant, providing a strong guarantee for the long-term stable operation of the cable.

[0023] With the dual guarantees of high-efficiency sealing and intelligent dehumidification, the risks of electrical faults such as the decline in insulation performance and short circuits of the cable caused by the humid environment are effectively reduced, providing strong support for the long-term stable operation of the cable and extending the service life of the cable and the branch box. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, so they should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other relevant drawings can also be obtained based on these drawings.

[0025] Figure 1 is a schematic diagram of the overall structure of an intelligent low-voltage cable branch box provided by an embodiment of the present invention;

[0026] Figure 2 is a schematic diagram of the bottom structure of an intelligent low-voltage cable branch box provided by an embodiment of the present invention;

[0027] Figure 3 is a schematic diagram of the internal structure of an intelligent low-voltage cable branch box provided by an embodiment of the present invention;

[0028] Figure 4 is a schematic diagram of the structure of the conical connection cylinder and the wire cylinder of an intelligent low-voltage cable branch box provided by an embodiment of the present invention;

[0029] Figure 5 is a schematic diagram of the right-view sectional structure of an intelligent low-voltage cable branch box provided by an embodiment of the present invention;

[0030] Figure 6 is an intelligent low-voltage cable branch box provided by an embodiment of the present invention Figure 5 and the enlarged structure schematic diagram at position A therein;

[0031] Figure 7 It is a schematic front view of the right - hand side cross - section of an intelligent low - voltage cable distribution box provided by an embodiment of the present invention;

[0032] Figure 8 It is an intelligent low - voltage cable distribution box provided by an embodiment of the present invention Figure 7 The enlarged structure schematic diagram at position B in it;

[0033] Figure 9 It is a schematic diagram of the partial explosion structure of an intelligent low - voltage cable distribution box provided by an embodiment of the present invention;

[0034] Figure 10 It is a schematic diagram of the installation groove and liquid discharge channel structure of an intelligent low - voltage cable distribution box provided by an embodiment of the present invention;

[0035] Figure 11 It is a schematic diagram of the gas flow direction when the external temperature of an intelligent low - voltage cable distribution box is relatively low provided by an embodiment of the present invention;

[0036] Figure 12 It is a schematic diagram of the gas flow direction after the heating block of an intelligent low - voltage cable distribution box works provided by an embodiment of the present invention.

[0037] In the figure: 1, box body; 2, bottom plate; 3, cable fixing rack; 4, conical connection cylinder; 5, wire cylinder; 6, piston; 7, connecting rod; 8, annular airbag; 9, U - shaped claw; 11, mounting plate; 12, sleeve; 13, T - shaped plug; 14, lightning arrester; 15, rubber cap; 51, installation groove; 52, heating block; 53, moving cavity; 54, connecting spring; 61, conductive column; 62, magnetic block; 71, air guiding cavity; 72, magnetic cylinder; 73, conductive cylinder; 74, first channel; 81, second channel; 91, condensate cavity; 92, liquid discharge channel; 93, drying part. Specific embodiments

[0038] To make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0039] Example 1, refer to Figures 1-6, an intelligent low-voltage cable branch box, comprising a box body 1. Inside the box body 1, a mounting plate 11 is installed. On the mounting plate 11, a plurality of sleeves 12 are installed. At the end of the sleeve 12, a T-shaped plug 13 is installed. Inside the T-shaped plug 13, a stress cone and a cable crimping terminal are provided for electrical connection with the cable. At the rear side of the T-shaped plug 13, a lightning arrester 14 is installed to protect the cable branch box and its connected electrical equipment from the damage of lightning overvoltage. A rubber cap 15 is sleeved at the end of the lightning arrester 14 to play an insulating and protective role. At the bottom of the box body 1, a bottom plate 2 is installed. On the bottom plate 2, an outlet hole, an inlet hole and a cable fixing bracket 3 are provided. On the cable fixing bracket 3, a hoop for fixing the cable is installed. On the bottom plate 2 corresponding to the outlet hole and the inlet hole, a conical connecting cylinder 4 is installed to form a transition connection with the cable, which helps to maintain the sealing and stability of the cable. It further includes:

[0040] A drying and sealing assembly: The drying and sealing assembly is arranged inside the conical connecting cylinder 4. The drying and sealing assembly is used to maintain the seal between the cable and the outlet hole and the inlet hole, and at the same time dry the external humid air at the bottom of the bottom plate 2.

[0041] An adaptive air supplementing assembly: The adaptive air supplementing assembly is arranged inside the drying and sealing assembly. The adaptive air supplementing assembly can enhance the sealing effect of the drying and sealing assembly when the external temperature is low.

[0042] A dehumidifying assembly: The dehumidifying assembly is arranged on the drying and sealing assembly. The dehumidifying assembly dehumidifies the drying and sealing assembly according to the state of the adaptive air supplementing assembly.

[0043] Furthermore, the drying and sealing assembly includes a wire cylinder 5, a connecting rod 7, an annular airbag 8, and a U-shaped claw 9. The wire cylinder 5 is snap-fitted and installed on the conical connecting cylinder 4. The annular airbag 8 is fixedly installed inside the wire cylinder 5. A plurality of movable cavities 53 are arranged inside the wire cylinder 5. Inside the movable cavity 53, a connecting spring 54 is installed. The lower end of the connecting spring 54 is fixedly connected to the top of the connecting rod 7. The U-shaped claw 9 is fixedly connected to the bottom end of the connecting rod 7. When the cable is installed, its end sequentially passes through the conical connecting cylinder 4, the U-shaped claw 9, the wire cylinder 5 and the annular airbag 8, and finally extends into the box body 1. At the upper end of the inner side of the U-shaped claw 9, a drying part 93 is provided. The drying part 93 has elasticity and hygroscopicity, and can closely fit the cable surface and absorb the moisture at the outlet hole and the inlet hole.

[0044] A second passage 81 is provided to penetrate through the bottom wall of the annular airbag 8 and the movable cavity 53. When the cable passes through the U-shaped gripper 9 and drives the connecting rod 7 to move upward, the gas in the movable cavity 53 will be compressed and enter the annular airbag 8 through the second passage 81, causing it to bulge and closely fit the surface of the cable. This automatic inflation mechanism ensures that the annular airbag 8 can quickly and effectively form a seal during the cable installation process. The number of U-shaped grippers 9 in a single wire barrel 5 is two and they are symmetrically arranged left and right along the central axis of the wire barrel 5. This layout helps to balance the force on the cable when passing through, preventing the cable from deviating to one side and resulting in poor sealing or damage. Both the movable cavity 53 and the connecting rod 7 are annularly and equidistantly distributed along the central axis of the wire barrel 5, ensuring that the annular airbag 8 can bulge evenly.

[0045] It should be noted that the drying parts 93 are equidistantly distributed along the inner edge of the U-shaped gripper 9. The drying parts 93 are convex arc-shaped pieces and are elastic, enabling them to better fit the surface of the cable. Even if there are minor irregularities on the cable surface, they can make close contact, thereby improving the drying effect. The drying parts 93 are pressed from a polymer permeable membrane material. This material not only has excellent moisture absorption performance but also good elasticity and wear resistance. The elastic design allows the drying parts 93 to adapt to cables of different diameters and shapes, ensuring a long-term stable drying effect. The annular airbag 8 is made of TPU material. This material has excellent elasticity and wear resistance, can closely fit the surface of the cable after inflation, forming an effective sealing barrier. At the same time, the TPU material also has good anti-aging performance and tear resistance, ensuring the long service life of the annular airbag 8. The upper end of the connecting rod 7 in the initial state of the connecting spring 54 is located inside the movable cavity 53, preventing the connecting rod 7 from detaching from the movable cavity 53. The connecting rod 7 is slidingly and sealingly connected to the movable cavity 53, ensuring that no air leakage occurs during the movement of the connecting rod 7.

[0046] In this embodiment, the cable first passes through the conical connecting cylinder 4, which forms a transition connection with the cable, helping to maintain the sealing and stability of the cable. Then, the cable enters the U-shaped gripper 9. Since the drying parts 93 are provided at the upper inner side of the U-shaped gripper 9, these convex arc-shaped pieces will immediately come into contact with the surface of the cable. When the cable continues to move forward, it will push the U-shaped gripper 9 upward. Since the U-shaped gripper 9 is fixedly connected to the bottom end of the connecting rod 7, the connecting rod 7 will also move upward accordingly. Also, because the top of the connecting rod 7 is connected to the movable cavity 53 through the connecting spring 54, as the connecting rod 7 moves upward, the gas in the movable cavity 53 will be gradually compressed.

[0047] It should be noted that when the cable moves forward and contacts the U-shaped gripper 9, the diameter of the cable will prevent it from passing through further unobstructed. At this time, the pushing force of the cable will act on the U-shaped gripper 9 through the drying parts 93, pushing it upward along the designed path (i.e., the direction of the connecting rod 7).

[0048] Gas flow and inflation of the annular airbag 8: The compressed gas flows into the annular airbag 8 through the second channel 81 arranged in a penetrating manner. As the gas continues to be filled, the annular airbag 8 will gradually bulge and closely adhere to the cable surface. This automatic inflation mechanism ensures that the annular airbag 8 can quickly and effectively form a seal, preventing external humid air and dust from entering the interior of the box body 1.

[0049] Function of the drying part 93: During the process of the cable passing through the U-shaped jaw 9, the drying part 93 will continuously contact the cable surface and absorb moisture. Since the drying part 93 is made of a polymer permeable membrane material and has excellent moisture absorption performance and elasticity, it can closely adhere to the cable surface and effectively remove moisture. Even if there are slight unevenness on the cable surface, the elastic design of the drying part 93 can ensure good contact with the cable surface, thereby improving the drying effect.

[0050] Maintaining sealing and stability: Once the annular airbag 8 is fully bulged and closely adheres to the cable surface, the entire drying and sealing assembly forms a complete sealing system. This system can not only effectively prevent the intrusion of external humid air and dust, but also keep the environment around the cable dry through the continuous action of the drying part 93.

[0051] At the same time, the number and layout of the U-shaped jaws 9 (two and symmetrically arranged on the left and right along the central axis of the wire cylinder 5) and the annular equidistant distribution design of the movable cavity 53 and the connecting rod 7 all contribute to balancing the force on the cable during passing, preventing the cable from deviating to one side and causing poor sealing or damage.

[0052] In summary, the drying and sealing assembly of this intelligent low-voltage cable branch box realizes the automatic sealing and drying functions of the cable when passing through the box body 1; by the cable pushing the U-shaped jaw 9 to compress the gas in the movable cavity 53, the annular airbag 8 is automatically inflated and closely adheres to the cable surface, forming an effective sealing barrier, effectively preventing the intrusion of external humid air and dust, and ensuring the dryness and cleanliness of the cable; the drying part 93 built in the U-shaped jaw 9 is made of a polymer permeable membrane material, can closely adhere to the cable surface and efficiently absorb moisture, and can maintain good contact even when there are slight unevenness on the cable surface, significantly improving the drying effect of the cable and extending the service life of the cable; and the entire drying and sealing process does not require manual intervention, and the automatic inflation and sealing of the annular airbag 8 can be completed through the self-propelling force of the cable, greatly simplifying the operation process and improving work efficiency; at the same time, this design is applicable to cables of different diameters. Through the elastic design of the drying part 93 and the adaptability of the annular airbag 8, it can closely adhere to and effectively seal various specifications of cables, with a wide range of application prospects. This design not only improves the safety and reliability of cable connections, but also extends the service life of the cable and its connecting equipment.

[0053] Embodiment 2. Refer to Figures 5-8 , the adaptive air supplement component includes an air guide cavity 71 provided in the connecting rod 7. The upper end of the air guide cavity 71 penetrates through its top wall and is provided with a first channel 74. The air guide cavity 71 communicates with the movable cavity 53 through the first channel 74. The lower end of the air guide cavity 71 penetrates through the lower side wall of the connecting rod 7. A piston 6 is slidably arranged in the air guide cavity 71. A magnetic cylinder 72 is fixedly installed in the lower port of the air guide cavity 71.

[0054] Furthermore, a magnetic block 62 is provided at the lower end of the piston 6. The opposite surfaces of the magnetic block 62 and the magnetic cylinder 72 are set to have the same pole magnetism. The piston 6 is slidably and sealingly connected to the air guide cavity 71. At room temperature, the piston 6 is located in the middle of the air guide cavity 71. Under normal conditions (i.e., when no external force is applied), the piston 6 will be repelled by the magnetic cylinder 72 and remain in the middle position of the air guide cavity 71. This design not only ensures the sealing performance but also enables the piston 6 to move flexibly when an external force is applied. The lower end of the magnetic block 62 matches the inner cavity of the magnetic cylinder 72.

[0055] It should be noted that the adaptive air supplement component further includes a condensate cavity 91 and a drain channel 92 provided in the U-shaped claw 9. The end portions of the drain channel 92 penetrate through the bottom wall of the condensate cavity 91 and the outer side wall of the U-shaped claw 9 respectively. The drain channel 92 is arranged with a large upper port and a small lower port, ensuring that water vapor is easy to discharge and difficult to enter. The air guide cavity 71 located below the piston 6 communicates with the condensate cavity 91. The moisture absorbed by the drying part 93 will gradually accumulate and finally enter the condensate cavity 91. The water vapor entering the condensate cavity 91 will condense into water droplets in the condensate cavity 91 and be discharged through the drain channel 92. At the same time, the entry of this part of the water vapor will cause the temperature of the gas in the air guide cavity 71 to decrease (indicating that the external environment is also relatively humid, such as during the rainy season). This temperature change will be transmitted to the air guide cavity 71 and the movable cavity 53, causing the gas inside to contract accordingly. Therefore, under the magnetic force, the piston 6 moves upward accordingly, and then can push the gas in the air guide cavity 71 above the piston 6 into the movable cavity 53 and the annular airbag 8, realizing automatic air supplement to the annular airbag 8 to maintain its seal with the cable.

[0056] In this embodiment, the stable state under normal conditions: Under normal conditions, that is, when no external force is applied, the magnetic block 62 on the piston 6 is repelled by the same pole magnetism in the magnetic cylinder 72, so that the piston 6 remains in the middle position of the air guide cavity 71. This design not only ensures the sealing performance of the air guide cavity 71 to prevent gas leakage but also allows the piston 6 to move flexibly when needed.

[0057] Moisture Absorption and Condensate Formation: When the cable passes through the U-shaped jaw 9, the moisture on its surface is absorbed by the drying section 93. Over time, this moisture gradually accumulates and turns into water vapor, which enters the condensate chamber 91 connected to the air guide chamber 71. Inside the condensate chamber 91, the water vapor easily condenses into water droplets for the following reasons:

[0058] Surface Area Effect: The inner wall of the condensate chamber 91 provides the surface area for water vapor condensation. When water vapor molecules come into contact with the inner wall of the condensate chamber 91, due to the adsorption effect of the wall material, the water vapor molecules will form a thin water film or condense into water droplets on the wall surface.

[0059] Humidity Change: As water vapor continuously enters the condensate chamber 91, the humidity inside the chamber gradually increases. When the humidity reaches a certain level, the collision frequency between water vapor molecules increases, which is conducive to the formation of larger water molecule clusters and then the condensation into water droplets.

[0060] Reduced Air Flow: Inside the condensate chamber 91, the air flow is relatively slow, reducing the possibility of water vapor molecules being carried away. This reduced air flow helps the water vapor stay in the condensate chamber 91 for a longer time, increasing the chance of water vapor condensation.

[0061] Temperature Change and Air Pressure Adjustment: The process of water vapor entering the condensate chamber 91 and condensing into water droplets releases latent heat, but overall it causes the temperature of the gas in the air guide chamber 71 to decrease (this temperature change reflects the humidity condition of the external environment, especially when the external environment is also relatively humid, such as during the rainy season). This temperature change will further be transmitted to the movable chamber 53 connected to the air guide chamber 71, causing the gas inside it to contract accordingly due to the principle of thermal expansion and contraction.

[0062] Automatic Air Complementary Mechanism: As the gas pressure in the movable chamber 53 decreases, and under the continuous repulsive force of the magnetic cylinder 72 on the piston 6, the piston 6 will start to move upward. The upward movement of the piston 6 will compress the gas in the upper part of the air guide chamber 71 and push this part of the gas into the movable chamber 53 through the first channel 74, and then into the annular airbag 8 through the second channel 81. This process realizes the automatic air complement to the annular airbag 8, ensuring a tight sealing state between it and the cable. This sealing state effectively prevents the intrusion of external humid air, dust and other impurities, protecting the cable and its surrounding environment from being dry and clean.

[0063] Condensate Discharge: The water droplets accumulated in the condensate chamber 91 are discharged to the outside of the U-shaped jaw 9 through the drain channel 92, preventing the condensate from accumulating and causing damage to the cable or the sealing component.

[0064] In summary, the adaptive air supplement component in this embodiment effectively overcomes the disadvantages such as poor sealing performance that may occur in existing sealing devices when the temperature changes. When the humidity of the external environment increases, causing the water vapor in the condensate chamber 91 to condense and the temperature of the gas in the air guide chamber 71 to decrease, the adaptive air supplement can automatically sense and respond to this change. By moving the piston 6 upward, gas is pushed into the movable chamber 53 and the annular airbag 8 to achieve automatic air supplement, thereby maintaining a tight sealing state between the annular airbag 8 and the cable. The automatic air supplement mechanism effectively addresses the problem of reduced sealing performance caused by changes in the external temperature or humidity, significantly enhancing the stability and reliability of the sealing device under different environmental conditions. This stability is not only reflected in the persistent maintenance of the sealing performance but also in the effective isolation of external humid air, dust, and other impurities, providing strong guarantee for the dryness and cleanliness of the cable and its surrounding environment. By reducing external erosion and internal corrosion caused by poor sealing, the adaptive air supplement component helps to extend the service life of the cable and the sealing device. At the same time, its design takes into account the thermal expansion and contraction characteristics of the material, avoiding problems such as damage or failure of the seal caused by temperature changes.

[0065] Embodiment 3. Refer to Figures 5-12 , the dehumidification component includes a mounting groove 51, a conductive column 61, and a conductive cylinder 73. The mounting groove 51 is located at the upper end of the wire cylinder 5 and an electric heating block 52 is installed inside it. The electric heating block 52 is annular and surrounds the annular airbag 8, ensuring that heat can be transmitted to the inside of the annular airbag 8. The conductive column 61 is located at the upper end of the piston 6, and the conductive cylinder 73 is located at the lower end of the first channel 74. When the piston 6 moves upward, the conductive column 61 will contact the conductive cylinder 73.

[0066] Furthermore, the input end of the electric heating block 52 is electrically connected to an external power supply for power supply. The wire cylinder 5 is made of a high thermal conductivity material, ensuring that the heat generated when the electric heating block 52 works can be effectively transmitted. The inside of the conductive cylinder 73 is provided with an inner groove that matches the first channel 74, ensuring that gas can flow normally. The conductive cylinder 73, the conductive column 61, and the electric heating block 52 are electrically connected. The end of the conductive column 61 matches the inner groove of the conductive cylinder 73. When the conductive cylinder 73 contacts the conductive column 61 (indicating that the external humidity is relatively high at this time and the piston 6 moves upward a relatively large distance), the electric heating block 52 starts to work. The heat generated by it will be transmitted to the air guide chamber 71, the movable chamber 53, and the annular airbag 8 through the wire cylinder 5. At this time, the gas in the chamber expands due to heat, and the expanded gas will push the piston 6 downward. During the downward movement of the piston 6, an exhaust (hot gas) action will be triggered in the air guide chamber 71 (refer to Figure 12 ). This exhaust action helps to discharge the accumulated liquid in the condensate chamber 91 on the one hand, and on the other hand, it can also perform an additional drying process on the drying part 93. When the conductive column 61 and the conductive cylinder 73 are no longer in contact, the electric heating block 52 stops working.

[0067] It should be noted that when the external humidity is relatively high, referring to the second embodiment, the piston 6 will move upward at this time. During this process, the upward movement of the piston 6 will perform a suction action in the condensate chamber 91 (refer to Figure 11 ), on the one hand, this will cause the water vapor on the drying part 93 to be adsorbed into the condensate chamber 91 (realizing the automatic drying of the drying part 93), and at the same time, it helps to timely reflect the change of external moisture into the air guide chamber 71 and the movable chamber 53.

[0068] In this embodiment, humidity sensing and piston 6 movement: when the external humidity is relatively high, according to the previous mechanism (as described in the second embodiment), the moisture is absorbed by the drying part 93 on the surface of the cable and gradually converted into water vapor, which enters the condensate chamber 91. As the water vapor accumulates, the humidity in the condensate chamber 91 increases, causing the piston 6 to move upward due to the change in gas pressure. During the upward movement of the piston 6, its suction action causes a certain negative pressure to be formed in the condensate chamber 91. This negative pressure promotes the further suction of the adsorbed water vapor on the drying part 93 into the condensate chamber 91. In this way, not only the automatic drying of the drying part 93 is realized, reducing the direct impact of water vapor on the cable, but also the moisture is effectively collected in the condensate chamber 91, providing conditions for subsequent dehumidification treatment, and at the same time reflecting the change of external moisture into the air guide chamber 71 and the movable chamber 53, enabling the entire system to timely sense and respond to the change of humidity, and thus taking corresponding dehumidification measures. This intelligent sensing and automatic response mechanism ensures that the dryness and tightness of the cable and its surrounding environment are effectively guaranteed.

[0069] Electric contact triggers heating: As the piston 6 continues to move upward, the conductive column 61 at its upper end finally contacts the conductive cylinder 73 located at the lower end of the first channel 74. This contact behavior, as an electrical signal, triggers the start of the electric heating block 52. The electric heating block 52 is powered by an external power supply, and because it is arranged around the annular airbag 8, the heat generated by it is quickly transferred to the inside of the air guide chamber 71, the movable chamber 53, and the annular airbag 8 through the highly heat-conductive wire cylinder 5.

[0070] Thermal expansion and exhaust: The gas in the chamber expands when heated. The pressure generated by this expansion pushes the piston 6 downward. During the downward movement of the piston 6, it will trigger an exhaust (hot air) action in the air guide chamber 71. This exhaust action not only helps to discharge the liquid accumulated in the condensate chamber 91 (including the water droplets condensed from water vapor), reducing the damage of the accumulated liquid to the cable or the sealing component, but also the hot air performs an additional drying treatment on the drying part 93, further improving the dehumidification effect.

[0071] Heating Stop and Recovery: When the conductive column 61 is no longer in contact with the conductive cylinder 73 (i.e., the piston 6 is gradually pushed by air pressure to the bottom of the air guide cavity 71), the electric heating block 52 automatically stops working, and the system returns to its normal state. At this time, the temperatures of the gas in the annular airbag 8, the air guide cavity 71, and the movable cavity 53 gradually decrease. However, due to the previous heating and exhaust processes, the humidity level of the entire system has been significantly reduced, effectively ensuring the dryness and tightness of the cable and its surrounding environment.

[0072] It should be noted that: through the coordinated suction and exhaust actions of the piston 6, a comprehensive and efficient automatic drying process of the drying part 93 is achieved, thereby ensuring that it can continuously and effectively remove the moisture on the surface of the cable. Specifically, when the external humidity increases, the moisture on the surface of the cable is first adsorbed by the drying part 93. As the moisture accumulates, the gas pressure in the condensate cavity 91 changes, triggering the piston 6 to start moving upward. During the upward movement, the suction action of the piston 6 creates a negative pressure in the condensate cavity 91, which effectively sucks the moisture adsorbed on the drying part 93 further into the condensate cavity 91, realizing the preliminary drying of the drying part 93.

[0073] Subsequently, when the piston 6 continues to move upward and contacts the conductive cylinder 73, the electric heating block 52 is activated to heat the gas in the chamber. The heated gas expands and pushes the piston 6 downward. During this process, the exhaust action of the piston 6 discharges the hot gas into the air guide cavity 71 and flows through the condensate cavity 91 to the drying part 93 for further drying treatment. In this way, under the dual action of suction and exhaust, the drying part 93 realizes a comprehensive and efficient automatic drying, ensuring that it can continuously and effectively remove the moisture on the surface of the cable. Therefore, the coordinated suction and exhaust actions of the piston 6 not only enhance the automation degree of the dehumidification system but also improve the drying efficiency and effect of the drying part 93, providing a strong guarantee for the long-term stable operation of the cable.

[0074] In summary, through steps such as humidity sensing, electrical contact triggering heating, thermal expansion exhaust, and automatic heating stop, the dehumidification component realizes intelligent dehumidification and dynamic adjustment of the environment around the cable, ensuring the long-term stable operation of the cable. Through the humidity sensing mechanism, the component can automatically detect changes in the external humidity and accordingly adjust the dehumidification strategy. When the external humidity increases, the component can quickly respond and automatically start the dehumidification process without manual intervention, improving the timeliness and efficiency of dehumidification. The heat generated by the electric heating block 52 is used to heat the gas in the chamber, causing the gas to expand and push the piston 6 to move, thereby effectively discharging the accumulated liquid in the condensate chamber 91. At the same time, the hot gas also performs additional drying treatment on the drying part 93, further enhancing the dehumidification effect and ensuring a low humidity state of the cable and its surrounding environment. Through timely and effective dehumidification and drying treatment, the component can significantly reduce the humidity level around the cable, reduce the erosion and damage of water vapor to the cable, thereby extending the service life of the cable and improving the stability and reliability of the power system. The intelligent sensing and automatic dehumidification functions of the component enable it to adapt to the requirements of different humidity environments and keep the cable dry in both high humidity and low humidity environments, improving the environmental adaptability and operating efficiency of the equipment.

[0075] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0076] It should be noted that the specific model specifications of the motor need to be selected and determined according to the actual specifications of the device, etc. The specific selection calculation method adopts the existing technology in this field, so it will not be elaborated in detail.

[0077] The above description is only the preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An intelligent low-voltage cable branch box, comprising a box body (1), an installation plate (11) is installed inside the box body (1), a plurality of sleeves (12) are installed on the installation plate (11), a T-shaped plug (13) is installed at the end of the sleeve (12), a stress cone and a cable crimping terminal are arranged inside the T-shaped plug (13), a lightning arrester (14) is installed at the rear side of the T-shaped plug (13), a rubber cap (15) is sleeved at the end of the lightning arrester (14), a bottom plate (2) is installed at the bottom of the box body (1), an outlet hole, an inlet hole and a cable fixing bracket (3) are arranged on the bottom plate (2), a hoop for fixing the cable is installed on the cable fixing bracket (3), and a conical connecting cylinder (4) is installed on the bottom plate (2) corresponding to the outlet hole and the inlet hole, characterized in that, Further included are: A drying and sealing assembly: The drying and sealing assembly is arranged inside the conical connecting cylinder (4). The drying and sealing assembly is used to maintain the seal between the cable and the wire outlet hole and the wire inlet hole, and at the same time dry the external humid air at the bottom of the bottom plate (2); The drying and sealing assembly includes a wire cylinder (5), a connecting rod (7), an annular airbag (8), and a U-shaped clamping jaw (9). The wire cylinder (5) is clamped and installed on the conical connecting cylinder (4). The annular airbag (8) is fixedly installed inside the wire cylinder (5). A plurality of movable cavities (53) are arranged inside the wire cylinder (5). A connecting spring (54) is installed inside the movable cavity (53). The lower end of the connecting spring (54) is fixedly connected to the top of the connecting rod (7). The U-shaped clamping jaw (9) is fixedly connected to the bottom end of the connecting rod (7). A drying part (93) is arranged at the upper end inside the U-shaped clamping jaw (9). A second channel (81) is provided in a through manner between the bottom wall of the annular airbag (8) and the movable cavity (53); An adaptive air supplementing assembly: The adaptive air supplementing assembly is arranged inside the drying and sealing assembly. The adaptive air supplementing assembly can strengthen the sealing effect of the drying and sealing assembly when the external temperature is low; The adaptive air supplementing assembly includes an air guide cavity (71) arranged inside the connecting rod (7). The upper end of the air guide cavity (71) penetrates through its top wall to be provided with a first channel (74). The lower end of the air guide cavity (71) penetrates through the lower side wall of the connecting rod (7). A piston (6) is slidably arranged inside the air guide cavity (71). A magnetic cylinder (72) is fixedly installed inside the lower port of the air guide cavity (71); A magnetic block (62) is arranged at the lower end of the piston (6). The opposite surfaces of the magnetic block (62) and the magnetic cylinder (72) are set to have the same pole magnetism. The piston (6) is slidably and sealingly connected to the air guide cavity (71). The piston (6) at normal temperature is located in the middle of the air guide cavity (71). The lower end of the magnetic block (62) matches the inner cavity of the magnetic cylinder (72); The adaptive air supplementing assembly further includes a condensate cavity (91) and a liquid discharge channel (92) arranged inside the U-shaped clamping jaw (9). The end parts of the liquid discharge channel (92) respectively penetrate through the bottom wall of the condensate cavity (91) and the outer side wall of the U-shaped clamping jaw (9). The liquid discharge channel (92) is arranged in a shape with a large upper port and a small lower port. The air guide cavity (71) located below the piston (6) is communicated with the condensate cavity (91); A dehumidifying assembly: The dehumidifying assembly is arranged on the drying and sealing assembly. The dehumidifying assembly performs dehumidification treatment on the drying and sealing assembly according to the state of the adaptive air supplementing assembly.

2. The intelligent low-voltage cable distribution box according to claim 1, wherein The number of the U-shaped clamping jaws (9) inside a single wire cylinder (5) is two and they are symmetrically arranged left and right along the central axis of the wire cylinder (5). The movable cavities (53) and the connecting rods (7) are both annularly and equidistantly distributed along the central axis of the wire cylinder (5).

3. The intelligent low-voltage cable branch box according to claim 1, characterized in that, The drying portion (93) is evenly spaced along the inner edge of the U-shaped clamping claw (9); the drying portion (93) is a raised arc-shaped piece and is elastic; the drying portion (93) is formed by pressing a polymer membrane material; and the annular airbag (8) is made of TPU material.

4. An intelligent low-voltage cable distribution box according to claim 1, characterized in that, When the connecting spring (54) is in an initial state, the upper end of the connecting rod (7) is located inside the active cavity (53), and the connecting rod (7) and the active cavity (53) are connected in a sliding and sealing manner.

5. An intelligent low-voltage cable distribution box according to claim 1, characterized in that, The dehumidification assembly comprises a mounting groove (51), a conductive column (61) and a conductive tube (73); the mounting groove (51) is located at the upper end of the wire tube (5) and has an electric heating block (52) installed therein; the electric heating block (52) is annular and is arranged around the annular airbag (8); the conductive column (61) is located at the upper end of the piston (6); and the conductive tube (73) is located at the lower end of the first channel (74).

6. The intelligent low-voltage cable distribution box according to claim 5, characterized in that, The input end of the electric heating block (52) is electrically connected to an external power source, the wire tube (5) is made of a high thermal conductivity material, an inner groove matching the first channel (74) is provided through the inside of the conductive tube (73), the conductive column (61) and the electric heating block (52) are electrically connected, and the end of the conductive column (61) matches the inner groove of the conductive tube (73).

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