Leakage-proof primary and secondary fusion complete ring net box

Abstract

The application discloses a one-two fusion leakage-proof ring network box, and belongs to the electrical equipment field. The device comprises a ring network box body and threading seats installed on both sides of the ring network box body, a plurality of circumferentially distributed strip-shaped grooves are formed in the threading seats, a threading drum is arranged through the groove bottom of the strip-shaped grooves, an elastic sleeve for threading the wire is installed between the openings of both ends of the threading drum, a sliding cavity is formed between the outer wall of the elastic sleeve and the inner wall of the threading drum, a matched extrusion piston is arranged in the sliding cavity, an air extraction assembly is installed at the drum wall of the end of the threading drum away from the strip-shaped grooves, an air inlet is arranged at the end of the sliding cavity away from the air extraction assembly, and the air extraction assembly is used for reducing the pressure in the sliding cavity. The application changes the traditional passive sealing relying on the rubber elasticity into active pressure by the pressure difference, continuously compensates the elastic sleeve through the extrusion piston, and can maintain the stable holding force on the wire even if the material is aged and relaxed, so that the leakage-proof effect of the ring network box is effectively ensured.

Description

Technical Field

[0001] This invention relates to the field of electrical equipment technology, specifically to a leak-proof integrated primary and secondary ring network box. Background Technology

[0002] The integrated primary and secondary ring main unit is an intelligent power distribution device that integrates the primary high-voltage main circuit electrical components with secondary control, protection, monitoring, and communication units. It is mainly used in 10kV distribution network ring power supply systems, undertaking functions such as power distribution, fault isolation, and automated management. Ring main units are typically installed outdoors, directly exposed to rain, moisture, and temperature variations. Their enclosure and inlet / outlet interfaces must have reliable leak-proof performance to prevent moisture from entering and causing insulation failure or component damage to the integrated primary and secondary equipment.

[0003] In existing technologies, to maintain a seal when conductors enter and exit the ring main unit, annular rubber sealing rings are often installed inside the wiring holes on the side wall of the unit. During installation, the sealing ring is placed on the conductor and pressed into the wiring hole. The elastic contraction force of the rubber sealing ring itself tightly binds the outer surface of the conductor, while its outer edge is interference-fitted with the wall of the wiring hole, preventing external moisture from seeping in along the gap between the conductor and the hole wall.

[0004] However, the above sealing method still has the following drawbacks: In long-term operation, the rubber sealing ring is affected by factors such as temperature cycling, ultraviolet radiation, ozone oxidation, and electric field stress, which gradually cause it to age, harden, lose elasticity, and even crack. Relying solely on the material's own elasticity cannot continuously provide sufficient and uniform radial clamping force, resulting in tiny gaps between the sealing ring and the conductor. Because this sealing structure lacks an active maintenance and compensation mechanism for external pressure, once the rubber loosens, the seal fails, and external moisture can easily seep into the ring main unit through this gap, threatening the safe operation of the equipment. Summary of the Invention

[0005] The purpose of this invention is to provide a leak-proof integrated primary and secondary ring network box to solve the problem in the prior art where the elasticity of the rubber sealing ring decreases after aging and there is no active pressure compensation mechanism, resulting in long-term sealing failure at the inlet and outlet interfaces and leakage.

[0006] The technical problem to be solved by the present invention can be achieved by the following technical solution: a leak-proof primary and secondary integrated ring network box, including a ring network box body and wire threading seats installed on both sides of the ring network box body. The wire threading seats are provided with multiple circumferentially distributed strip grooves. A wire threading tube is provided through the bottom of the groove. An elastic sleeve for wires to pass through is installed between the two openings of the wire threading tube. A sliding cavity is formed between the outer wall of the elastic sleeve and the inner wall of the wire threading tube. A matching compression piston is provided in the sliding cavity. An air extraction component is installed on the end of the wire threading tube away from the strip groove. An air inlet is provided at the end of the sliding cavity away from the air extraction component. The air extraction component is used to reduce the pressure in the sliding cavity, so that the compression piston squeezes the elastic sleeve to wrap the wire. A matching folding component is installed in the strip groove, and the folding component is used to close the wire threading tube after unfolding.

[0007] Preferably, the air extraction assembly includes a housing, a sealing piston, and a pull rod. The housing is connected to the wall of the threading cylinder, and the inner cavity of the housing is in communication with the sliding cavity. The sealing piston is slidably installed inside the housing, and the pull rod is connected to the side of the sealing piston away from the threading cylinder. The bottom of the housing is provided with an opening for the pull rod to pass through.

[0008] Preferably, the folding component includes a movable flap, a fixed plate, and a sealing strip. The fixed plate is installed in the strip groove. The end of the movable flap away from the threading tube is rotatably connected to the fixed plate. The sealing strip is installed on the periphery of the movable flap, and the fixed plate is engaged with the strip groove through the sealing strip.

[0009] Preferably, the threading seat is equipped with a control component for driving multiple pull rods to slide synchronously. The control component includes an outer turntable, an inner turntable, and connecting rods. An annular groove for the outer turntable to rotate is opened at the center of the side of the threading seat near the strip groove. The outer turntable is coaxially connected to a rotating shaft that passes through the bottom of the annular groove, and the end of the rotating shaft is coaxially connected to the inner turntable. Multiple connecting rods are evenly distributed along the circumference of the inner turntable. One end of the connecting rod is eccentrically hinged to the inner turntable, and the other end of the connecting rod is hinged to the pull rod.

[0010] Preferably, the air inlet of the sliding cavity is connected to an air inlet ring with a hollow structure. One end of the air inlet ring extends into the strip groove and fits against the movable flap. An arc-shaped air inlet is provided directly below the air inlet ring.

[0011] Preferably, the movable flap of the folding component is folded and fits against the outer turntable. A ring magnet is embedded on one side of the movable flap to generate an adsorption force after it fits against the outer turntable. An elastic telescopic component is installed on the movable flap. When the ring magnet is fitted and adsorbed against the outer turntable, the elastic telescopic component is compressed into the movable flap. The outer turntable has multiple circumferentially distributed slots. After the outer turntable rotates to the position, the elastic telescopic component resets and engages with the slots.

[0012] Preferably, the elastic telescopic component includes a spring, a slider, and a protrusion. The movable flap of the folding component has an annular groove with a T-shaped cross-section. The spring is disposed at the bottom of the annular groove. The slider is movably disposed in the annular groove and connected to the spring. The protrusion is installed on the side of the slider away from the spring, and the protrusion extends into the slot when the spring returns to its original position.

[0013] Preferably, a first plug for engaging with the inner ring of the intake ring is installed on one side of the movable flap, and a second plug for extending into the elastic sleeve is installed on one side of the first plug, and the outer cross-section of the second plug is adapted to the inner cross-section of the elastic sleeve.

[0014] Preferably, the outer diameter of the elastic sleeve gradually increases from the direction away from the strip groove, and the inner diameter of the elastic sleeve is adapted to the outer diameter of the wire.

[0015] Preferably, a knob is installed at the center of the outer turntable, and a slot is provided on the movable flap of the folding component.

[0016] Compared with the prior art, the beneficial effects of this application are as follows: 1. This invention, through the arrangement of a wire threading base, a wire threading tube, an elastic sleeve, a sliding cavity, a compression piston, and an air extraction assembly, allows the air extraction assembly to remove gas from the sliding cavity after the wire passes through the elastic sleeve. This reduces the pressure within the cavity, causing the compression piston to move towards the lower pressure side under atmospheric pressure, thus axially compressing the elastic sleeve and forcing it to radially contract and tightly wrap around the wire. This sealing force originates from a continuous pressure difference rather than solely relying on the elasticity of the elastic sleeve itself. Even if the elastic sleeve undergoes plastic deformation or aging and loosening, as long as the negative pressure is maintained within the sliding cavity, the compression piston will automatically compensate, maintaining a long-term compression effect and blocking leakage channels. Simultaneously, an unfoldable folding component is provided within the strip-shaped groove. At unused interfaces, the folding component unfolds to seal the wire threading tube, forming a physical barrier and further enhancing the reliability of leak prevention.

[0017] 2. This invention applies continuous axial pressure to an elastic sleeve using a piston driven by atmospheric pressure. This pressure forces the elastic sleeve to contract radially, transforming its inherent elastic seal into an active clamping force continuously driven by the air pressure difference. Even if the rubber undergoes plastic deformation or stress relaxation, the piston automatically compensates, maintaining a stable clamping force on the outer wall of the conductor. Simultaneously, an unfoldable folding component is installed within the strip-shaped groove. When an interface is idle, the folding component can be unfolded to close the opening of the cable guide tube, forming an independent physical shield. This structure combines active pressure compensation with mechanical sealing of idle interfaces, working synergistically from two dimensions: maintaining a long-term seal and providing protection during idle periods. This effectively solves the leakage problem caused by rubber aging at the inlet and outlet of the primary and secondary fusion ring network box. Attached Figure Description

[0018] Figure 1This is a perspective view of a leak-proof primary and secondary integrated ring network box according to the present invention; Figure 2 This is a first-view perspective perspective view of the first state after the ring mesh box body is removed in the primary and secondary integrated ring mesh box of the present invention for preventing leakage. Figure 3 This is a second-view perspective perspective view of the first state after the removal of the ring mesh box body in the primary and secondary integrated ring mesh box of the present invention for preventing leakage. Figure 4 This is a perspective view of the second state after the ring mesh box body is removed in the primary and secondary integrated ring mesh box of the present invention for preventing leakage; Figure 5 This is a perspective view of the connection between the threading cylinder and the air extraction component in a primary and secondary integrated ring mesh box for leak prevention according to the present invention. Figure 6 This is a cross-sectional view of the connection between the threading cylinder and the air extraction component in a primary and secondary integrated ring mesh box for leak prevention according to the present invention. Figure 7 This is a perspective view of the folded component in a primary and secondary integrated ring mesh box for leak prevention according to the present invention; Figure 8 This is a cross-sectional view of the folded component in a primary and secondary integrated ring mesh box for leak prevention according to the present invention; Figure 9 This is a first-view perspective perspective view of the connection part between the control component and the threading cylinder in a primary and secondary integrated ring mesh box for leak prevention according to the present invention. Figure 10 This is a second-view perspective perspective view of the connection part between the control component and the threading cylinder in a primary and secondary integrated ring network box for leak prevention according to the present invention.

[0019] Explanation of reference numerals in the attached figures: 100. Ring mesh box body; 200. Cable guide; 201. Strip groove; 300. Cable guide tube; 301. Elastic sleeve; 302. Sliding cavity; 303. Extrusion piston; 400. Air extraction assembly; 401. Shell; 402. Sealing piston; 403. Pull rod; 500. Folding part; 501. Movable flap; 5011. Ring magnet; 5012. First plug; 5013. Second plug; 5014. Groove; 5015. Annular groove; 502. Fixing plate; 503. Sealing strip; 600. Control assembly; 601. Outer turntable; 6011. Slot; 6012. Knob; 602. Inner turntable; 603. Connecting rod; 700. Air intake ring; 701. Arc-shaped air intake; 800. Elastic telescopic part; 801. Spring; 802. Slider; 803. Protrusion. Detailed Implementation

[0020] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0021] Example 1 Most existing ring main units use rubber sealing rings installed inside the wiring holes for sealing the incoming and outgoing lines. However, after long-term use, the rubber sealing rings are prone to aging and hardening, and their elasticity weakens, making it impossible to maintain a tight wrap around the wires. This leads to sealing failure at the connection points, allowing external moisture to seep into the unit.

[0022] like Figures 1 to 6 In this embodiment, a leak-proof primary and secondary integrated ring network box is provided, including a ring network box body 100 and wire guides 200 installed on both sides of the ring network box body 100. The wire guides 200 are characterized by having multiple circumferentially distributed strip-shaped grooves 201. A wire guide tube 300 is provided through the bottom of the groove 201. An elastic sleeve 301 for wires to pass through is installed between the openings at both ends of the wire guide tube 300. A sliding cavity 3 is formed between the outer wall of the elastic sleeve 301 and the inner wall of the wire guide tube 300. 02. A matching compression piston 303 is provided in the sliding cavity 302. An air extraction component 400 is installed on the end wall of the threading tube 300 away from the strip groove 201. An air inlet is provided at the end of the sliding cavity 302 away from the air extraction component 400. The air extraction component 400 is used to reduce the pressure in the sliding cavity 302, so that the compression piston 303 can compress the elastic sleeve 301 to wrap the wire. A matching folding piece 500 is installed in the strip groove 201, and the folding piece 500 is used to close the threading tube 300 after unfolding.

[0023] The working principle of this embodiment is as follows: Figure 3 and Figure 6 The wire enters the conduit 300 and passes through the elastic sleeve 301 into the ring main body 100. After the wire is in place, the air extraction component 400 is operated to extract the air from the sliding cavity 302, creating a negative pressure inside the cavity. Under the action of external atmospheric pressure, the compression piston 303 tends to move towards the low-pressure side, thereby compressing the elastic sleeve 301. The elastic sleeve 301 is forced to contract radially inward under axial pressure, tightly gripping the outer surface of the wire, achieving a reliable radial seal. Since the sealing pressure is continuously provided by the air pressure difference, even if the elastic sleeve 301 experiences slight permanent deformation or material loosening, the compression piston 303 maintains its tendency to move under negative pressure, thus maintaining the clamping force and effectively preventing leakage. When the conduit 300 is not in use, the folding piece 500 in the strip groove 201 can be unfolded to close the opening of the conduit 300, providing further protection.

[0024] It should be emphasized that the core improvement of this embodiment lies in the following: The present invention applies continuous axial pressure to the elastic sleeve 301 under atmospheric pressure via a compression piston 303. This pressure forces the elastic sleeve 301 to contract radially, thereby transforming its own elastic seal into an active compression driven by a continuous pressure difference. Even if the rubber undergoes plastic deformation or stress relaxation, the compression piston 303 can automatically compensate and maintain a stable clamping force on the outer wall of the conductor. Simultaneously, an expandable folding member 500 is provided within the strip groove 201. When an interface is idle, the folding member 500 can be unfolded to close the opening of the cable threading tube 300, forming an independent physical shield. This structure combines active pressure compensation with mechanical sealing of idle interfaces, working synergistically from two dimensions: long-term sealing maintenance and protection during idle periods. This effectively solves the leakage problem caused by rubber aging at the inlet and outlet of the primary and secondary fusion ring network box.

[0025] It should be noted that, such as Figure 6 When the wire passes through the elastic sleeve 301, the outer wall of the wire fits tightly against the inner wall of the elastic sleeve 301, providing solid radial support for the elastic sleeve 301. In this state, after a negative pressure is established in the sliding cavity 302, the compression piston 303 hardly undergoes axial displacement, only exhibiting a tendency to apply pressure to the elastic sleeve 301. This tendency is converted into a continuous radial compression force from the elastic sleeve 301 on the wire, ensuring both a sealing effect and preventing the compression piston 303 from being difficult to reset after the negative pressure is released due to excessive movement, thus guaranteeing the reliability of repeated use.

[0026] like Figures 5 to 6 In this embodiment, the vacuum assembly 400 includes a housing 401, a sealing piston 402, and a pull rod 403. The housing 401 is connected to the wall of the threading tube 300, and the inner cavity of the housing 401 is in communication with the sliding cavity 302. The sealing piston 402 is slidably installed inside the housing 401, and the pull rod 403 is connected to the side of the sealing piston 402 away from the threading tube 300. The bottom of the housing 401 has an opening for the pull rod 403 to pass through. Pulling the pull rod 403 outward causes the sealing piston 402 to move inside the housing 401, drawing the gas in the sliding cavity 302 into the housing 401, thereby reducing the pressure in the sliding cavity 302. To maintain the negative pressure state, the position of the pull rod 403 after being pulled outward needs to be locked.

[0027] like Figure 4 and Figure 7In this embodiment, the folding component 500 includes a movable flap 501, a fixed plate 502, and a sealing strip 503. The fixed plate 502 is installed in the strip-shaped groove 201. The end of the movable flap 501 away from the wire threading tube 300 is rotatably connected to the fixed plate 502. The sealing strip 503 is installed on the periphery of the movable flap 501, and the fixed plate 502 is engaged with the strip-shaped groove 201 through the sealing strip 503. When the movable flap 501 is flipped up and unfolded, the sealing strip 503 fits against the side wall of the strip-shaped groove 201 to achieve closure; when flipped down, the wire threading tube 300 is exposed for wires to pass through.

[0028] like Figure 6 In this embodiment, to improve the sealing adaptability of the elastic sleeve 301, the outer diameter of the elastic sleeve 301 gradually increases from the direction away from the strip groove 201, forming a tapered outer contour, and the inner diameter of the elastic sleeve 301 is adapted to the outer diameter of the wire. When the compression piston 303 axially compresses the elastic sleeve 301, due to the gradual change in the outer diameter of the elastic sleeve 301, the compression piston 303 can generate a larger radial force on the elastic sleeve 301, which is conducive to the uniform contraction of the inner diameter of the elastic sleeve 301 and better wrapping the wire.

[0029] Example 2 It is understandable that in Embodiment 1, multiple wire threading cylinders 300 correspond to multiple sets of wires, and each wire threading cylinder 300 is equipped with an independent air extraction component 400. When multiple wires need to be sealed, the pull rod 403 needs to be pulled one by one. This not only results in low operating efficiency, but also makes it difficult to ensure that the negative pressure in each sliding cavity 302 is consistent, which may cause uneven sealing pressure at each interface and affect the overall consistency of leak prevention.

[0030] like Figure 2 and Figures 9 to 10 To solve the above problems, a control component 600 for driving multiple pull rods 403 to slide synchronously is installed on the wire threading base 200. The control component 600 includes an outer turntable 601, an inner turntable 602 and connecting rods 603. An annular groove for the outer turntable 601 to rotate is opened at the center of the wire threading base 200 near the side of the strip groove 201. The outer turntable 601 is coaxially connected to a rotating shaft that passes through the bottom of the annular groove, and the end of the rotating shaft is coaxially connected to the inner turntable 602. Multiple connecting rods 603 are evenly distributed around the inner turntable 602. One end of the connecting rod 603 is eccentrically hinged to the inner turntable 602, and the other end of the connecting rod 603 is hinged to the pull rod 403.

[0031] The working principle of this embodiment is as follows: Figures 9 to 10Rotating the outer turntable 601 drives the inner turntable 602 to rotate synchronously via the rotating shaft. Since one end of the connecting rod 603 is eccentrically hinged to the inner turntable 602, when the inner turntable 602 rotates, each connecting rod 603 undergoes planar motion, which drives the connecting rod 403 hinged to it to move outward along the shell 401, thereby driving all the sealing pistons 402 to move synchronously and simultaneously evacuate each sliding chamber 302, achieving consistent and synchronous sealing operation. After stopping, multiple interfaces obtain uniform sealing pressure.

[0032] It should be emphasized that the core improvement of this embodiment lies in the addition of a control component 600 consisting of an outer turntable 601, an inner turntable 602, and multiple sets of eccentric connecting rods 603, which transforms single-point operation into multi-point synchronous air extraction action. This not only significantly improves the wire threading sealing efficiency but also ensures the uniformity of sealing force at each wire interface, resulting in a coordinated and consistent anti-leakage effect in the entire box's wire entry and exit areas.

[0033] like Figure 4 and Figure 7 In this embodiment, to further improve operational convenience and stability, the movable flap 501 of the folding component 500 is folded and fits against the outer turntable 601. A ring magnet 5011 is embedded on one side of the movable flap 501 to generate an adsorption force after it fits against the outer turntable 601. The outer turntable 601 is made of a metal material that can be attracted by the ring magnet 5011. An elastic telescopic component 800 is installed on the movable flap 501. When the ring magnet 5011 is attached to the outer turntable 601, the elastic telescopic component 800 is compressed into the movable flap 501. The outer turntable 601 has multiple circumferentially distributed slots 6011. After the outer turntable 601 rotates to the position, the elastic telescopic component 800 resets and engages with the slots 6011.

[0034] It should be noted that after the outer turntable 601 is rotated to the set angle and all sliding cavities 302 are under negative pressure, the slot 6011 is exactly aligned with the position of the elastic telescopic member 800. At this time, the elastic telescopic member 800 automatically pops out, resets, and extends into the slot 6011, completing the automatic locking of the outer turntable 601 in the circumferential position. This locking state restricts the free rotation of the outer turntable 601, thereby maintaining the negative pressure sealing state in the sliding cavities 302; on the other hand, the mechanical locking of the elastic telescopic member 800 and the slot 6011, combined with the magnetic attraction of the annular magnet 5011, ensures the positional stability of the movable flap 501 in the open state, preventing it from accidentally deflecting and closing the threading tube 300.

[0035] like Figure 8In this embodiment, the elastic telescopic member 800 includes a spring 801, a slider 802, and a protrusion 803. The movable flap 501 of the folding member 500 has an annular groove 5015 with a T-shaped cross section. The spring 801 is disposed at the bottom of the annular groove 5015. The slider 802 is movably disposed in the annular groove 5015 and connected to the spring 801. The protrusion 803 is installed on the side of the slider 802 away from the spring 801, and the protrusion 803 extends into the slot 6011 when the spring 801 is reset.

[0036] It should be noted that, to ensure stability, the spring 801 in this embodiment is always in a charged state. That is, in the initial state, the spring 801 will push the slider 802 to maintain contact with the end of the annular groove 5015 away from the bottom of the groove. When the movable flap 501 is close to the outer turntable 601, the protrusion 803 is pressed into the annular groove 5015, which further compresses the spring 801. When the outer turntable 601 rotates and the slot 6011 is aligned with the protrusion 803, the spring 801 returns to its original position, and the protrusion 803 pops out and engages with the slot 6011, forming a mechanical limit.

[0037] like Figures 8 to 9 In this embodiment, a knob 6012 is installed at the center of the outer turntable 601 to facilitate the rotation of the outer turntable 601. A slot 5014 is provided on the movable flap 501 of the folding member 500 to facilitate the finger to pry into and flip the movable flap 501.

[0038] It should be noted that when the seal needs to be released, after the deflecting flap 501 disengages the elastic telescopic component 800 from the slot 6011, relying solely on air pressure to drive the outer turntable 601 to rotate and reset may result in jamming or incomplete reset due to friction or other factors. Therefore, this application includes a torsion spring (not shown in the figure) fitted on the shaft between the outer turntable 601 and the inner turntable 602. The torsion spring is located within an annular groove, with its two ends fixed to the wire guide 200 and the outer turntable 601, respectively. When the outer turntable 601 is rotated to evacuate air, the torsion spring stores force. After the elastic telescopic component 800 disengages from the slot 6011, the torsion spring releases its reset force, assisting the outer turntable 601 to smoothly rotate back to its initial position, allowing the sealing piston 402 and the pull rod 403 to reset smoothly, thus improving reset reliability.

[0039] Example 3 Understandably, in Embodiment 2, the control component 600 achieves synchronous air extraction from all the wire-threading reels 300. However, in actual use, some inlet and outlet interfaces of the ring main unit are often idle, meaning no wires are threaded into the wire-threading reels 300. If the control component 600 is operated to establish negative pressure, the unthreaded wire-threading reels 300, lacking radial support for the elastic sleeve 301, will cause the compression piston 303 to undergo significant axial displacement under the pressure difference. Excessive compression of the elastic sleeve 301 may not only damage it but also make it difficult for the compression piston 303 to return to its original position after the negative pressure is released, affecting the reuse of the interface. Furthermore, with one end of the opened wire-threading reel 300 exposed to the external environment, there is still a risk of rainwater splashing into its air inlet.

[0040] like Figures 5 to 8 To address the aforementioned issues, a hollow air intake ring 700 is installed at the air inlet of the sliding cavity 302. One end of the air intake ring 700 extends into the strip-shaped groove 201 and fits against the movable flap 501. An arc-shaped air intake 701 is located directly below the air intake ring 700. Simultaneously, a first plug 5012 is installed on one side of the movable flap 501 to engage with the inner ring of the air intake ring 700. A second plug 5013 is installed on one side of the first plug 5012 to extend into the elastic sleeve 301, and the outer cross-section of the second plug 5013 is adapted to the inner cross-section of the elastic sleeve 301.

[0041] The working principle of this embodiment is as follows: Figures 5 to 8 When a spool 300 is idle, the movable flap 501 is rotated to close it. After the movable flap 501 is closed, the sealing strip 503 on its periphery fits tightly against the side wall of the strip groove 201, forming the first seal on the opening of the spool 300. At the same time, the first plug 5012 moves synchronously with the movable flap 501, engaging the inner ring of the air intake ring 700 and forming a tight fit, constituting the second seal. The second plug 5013 is inserted into the inner cavity of the elastic sleeve 301, and its outer cross-section fits tightly against the inner wall of the elastic sleeve 301, constituting the third seal. Through the progressive layering of the above three sealing structures, the idle spool 300 is reliably sealed at the opening, the air intake channel, and the inner cavity of the elastic sleeve 301, preventing external moisture from seeping into the sliding cavity 302 or the ring mesh box through any path.

[0042] Simultaneously, the second plug 5013, after being inserted into the inner cavity of the elastic sleeve 301, occupies its internal space, forming a rigid stop on the compression piston 303 and strictly limiting its displacement range. In this state, even if the control component 600 operates synchronously to establish negative pressure in the sliding cavity 302, the compression piston 303 cannot slide excessively due to the supporting and limiting effect of the second plug 5013, thus avoiding the problem of the elastic sleeve 301 being damaged due to excessive compression and the compression piston 303 being difficult to reset. When the interface needs to be restored for threading, the movable flap 501 is opened. Since the arc-shaped air inlet 701 always faces directly downward, external air can smoothly enter the air inlet ring 700 and the sliding cavity 302 through the lower opening to balance the air pressure. Under the action of gravity, rainwater cannot enter the air inlet ring 700 from bottom to top, effectively solving the hidden danger of rainwater splashing into the air inlet of the threading tube 300 after it is opened.

[0043] It should be emphasized that the core improvement of this embodiment lies in the following: by using the movable flap 501 in conjunction with the sealing strip 503, the first plug 5012 in conjunction with the air intake ring 700, and the second plug 5013 in conjunction with the elastic sleeve 301, a triple progressive sealing structure is constructed at the idle interface. From the opening shielding and air passage sealing to the inner cavity filling, the structure provides step-by-step protection, which greatly improves the leakage prevention level of the idle interface. At the same time, the second plug 5013 occupies the inner cavity of the elastic sleeve 301 to form a mechanical stop, which restricts the axial displacement space of the compression piston 303 and prevents it from sliding excessively when the idle interface is under negative pressure, thus avoiding damage to the elastic sleeve 301 or difficulty in resetting. In addition, the arc-shaped air intake 701 of the air intake ring 700 faces downward, which eliminates the risk of rainwater backflow without affecting normal air intake, so that the ring mesh box has a more complete leakage prevention capability and operational reliability in the actual working conditions of selective use of multiple interfaces.

[0044] It should be noted that this application does not limit the specific structure of the first plug 5012, the second plug 5013, and the intake ring 700. The first plug 5012 and the inner ring of the intake ring 700 can adopt a conical surface fit to increase the sealing area and ensure the sealing reliability after snap-fit. The outer cross section of the second plug 5013 and the inner cross section of the elastic sleeve 301 can adopt a slight interference fit, which can provide stable support after insertion without scratching the inner wall of the elastic sleeve 301.

[0045] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed application.

Claims

1. A leak-proof integrated primary and secondary ring network box, comprising a ring network box body (100) and cable trays (200) installed on both sides of the ring network box body (100), characterized in that, The wire threading base (200) has multiple circumferentially distributed strip-shaped grooves (201). A wire threading cylinder (300) is installed through the bottom of the groove (201). An elastic sleeve (301) for the wire to pass through is installed between the two openings of the wire threading cylinder (300). A sliding cavity (302) is formed between the outer wall of the elastic sleeve (301) and the inner wall of the wire threading cylinder (300). A matching compression piston (303) is provided in the sliding cavity (302). The wire threading cylinder (300) is away from the strip-shaped grooves. An air extraction assembly (400) is installed on one end of the groove (201) at the cylinder wall. An air inlet is provided at the end of the sliding cavity (302) away from the air extraction assembly (400). The air extraction assembly (400) is used to reduce the pressure in the sliding cavity (302), so that the extrusion piston (303) extrudes the elastic sleeve (301) to wrap the wire. A matching folding piece (500) is installed in the strip groove (201), and the folding piece (500) is used to close the wire threading cylinder (300) after unfolding.

2. The leak-proof primary and secondary integrated ring network box as described in claim 1, characterized in that, The air extraction assembly (400) includes a housing (401), a sealing piston (402), and a pull rod (403). The housing (401) is connected to the wall of the threading tube (300), and the inner cavity of the housing (401) is connected to the sliding cavity (302). The sealing piston (402) is slidably installed inside the housing (401). The pull rod (403) is connected to the side of the sealing piston (402) away from the threading tube (300). The bottom of the housing (401) is provided with an opening for the pull rod (403) to pass through.

3. The leak-proof primary and secondary integrated ring network box as described in claim 1, characterized in that, The folding component (500) includes a movable flap (501), a fixed plate (502), and a sealing strip (503). The fixed plate (502) is installed in the strip groove (201). The end of the movable flap (501) away from the threading tube (300) is rotatably connected to the fixed plate (502). The sealing strip (503) is installed on the periphery of the movable flap (501), and the fixed plate (502) is engaged with the strip groove (201) through the sealing strip (503).

4. The leak-proof primary and secondary integrated ring network box as described in claim 2, characterized in that, The threading base (200) is equipped with a control component (600) for driving multiple pull rods (403) to slide synchronously. The control component (600) includes an outer turntable (601), an inner turntable (602), and connecting rods (603). The threading base (200) has an annular groove for the outer turntable (601) to rotate at the center of the side near the strip groove (201). The outer turntable (601) is coaxially connected to a rotating shaft that passes through the bottom of the annular groove, and the end of the rotating shaft is coaxially connected to the inner turntable (602). Multiple connecting rods (603) are evenly distributed around the inner turntable (602). One end of the connecting rod (603) is eccentrically hinged to the inner turntable (602), and the other end of the connecting rod (603) is hinged to the pull rod (403).

5. The leak-proof primary and secondary integrated ring network box as described in claim 3, characterized in that, The air inlet of the sliding cavity (302) is connected to an air inlet ring (700) with a hollow structure. One end of the air inlet ring (700) extends into the strip groove (201) and fits against the movable flap (501). An arc-shaped air inlet (701) is provided directly below the air inlet ring (700).

6. The leak-proof primary and secondary integrated ring network box as described in claim 4, characterized in that, The movable flap (501) of the folding component (500) is folded and fits against the outer turntable (601). A ring magnet (5011) is embedded on one side of the movable flap (501) to generate an adsorption force after it fits against the outer turntable (601). An elastic telescopic component (800) is installed on the movable flap (501). When the ring magnet (5011) fits against the outer turntable (601) and adsorbs, the elastic telescopic component (800) is compressed into the movable flap (501). The outer turntable (601) has multiple circumferentially distributed slots (6011). After the outer turntable (601) rotates to the position, the elastic telescopic component (800) resets and engages with the slots (6011).

7. The leak-proof primary and secondary integrated ring network box as described in claim 6, characterized in that, The elastic telescopic component (800) includes a spring (801), a slider (802), and a protrusion (803). The movable flap (501) of the folding component (500) has an annular groove (5015) with a T-shaped cross section. The spring (801) is located at the bottom of the annular groove (5015). The slider (802) is movably located in the annular groove (5015) and connected to the spring (801). The protrusion (803) is installed on the side of the slider (802) away from the spring (801), and the protrusion (803) extends into the slot (6011) when the spring (801) is reset.

8. A leak-proof primary and secondary integrated ring network box as described in claim 5, characterized in that, The movable flap (501) is equipped with a first plug (5012) on one side for engaging with the inner ring of the intake ring (700), and a second plug (5013) is installed on one side of the first plug (5012) for extending into the elastic sleeve (301), and the outer cross section of the second plug (5013) is adapted to the inner cross section of the elastic sleeve (301).

9. A leak-proof primary and secondary integrated ring network box as described in claim 1, characterized in that, The outer diameter of the elastic sleeve (301) gradually increases from the direction away from the strip groove (201), and the inner diameter of the elastic sleeve (301) is adapted to the outer diameter of the wire.

10. A leak-proof primary and secondary integrated ring network box as described in claim 4, characterized in that, A knob (6012) is installed at the center of the outer turntable (601), and a slot (5014) is provided on the movable flap (501) of the folding piece (500).

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