A repeatably openable intelligent protection shell for cable intermediate joint

Abstract

The application discloses a repeatedly openable intelligent protection shell of cable intermediate joint, and belongs to the technical field of power cable protection equipment. The shell comprises an upper shell and a lower shell which are buckled to each other through a quick locking mechanism. Cable inlet sealing structures are arranged at two ends of the upper shell and / or the lower shell and comprise peelable flexible sealing materials. At least one pressure relief port is arranged on the upper shell and / or the lower shell, and a sealing plug which can automatically fall off under a preset pressure is arranged in the pressure relief port. A fault indicator mounting position for fixing a fault indicator is arranged in the interior of the upper shell and / or the lower shell, and an outer wall is provided with a wireless transmission module accommodating cavity for accommodating a wireless transmission module. The wireless transmission module is electrically connected with the fault indicator. The repeatedly openable shell, multiple sealing and directional pressure relief structure are used, high-grade sealing protection and convenient maintenance are considered, the unification of explosion prevention and rapid opening and closing is realized, fault indication and wireless transmission are integrated, and non-excavation inspection is supported.

Description

Technical Field

[0001] This invention belongs to the technical field of power cable protection equipment, specifically relating to a reusable intelligent protective housing for cable intermediate joints. Background Technology

[0002] Power cables are a crucial component of electrical energy transmission. Due to limitations in transportation and laying conditions, long-distance transmission lines must be connected using intermediate joints. As a critical part of the line connection, the structural strength and sealing performance of cable intermediate joints directly affect the operational safety of the transmission line. They are among the weakest links in the power grid, with a much higher probability of failure than the cable itself. Therefore, existing technologies typically include a protective shell around the intermediate joint of buried cables to provide sealing, waterproofing, mechanical protection, and explosion-proof protection.

[0003] Currently, common cable joint protective housings include glue-sealed housings, which completely encapsulate the joint by injecting sealant inside the housing to achieve a high level of waterproofing and moisture resistance. While these housings provide good sealing under normal operating conditions, if an internal joint malfunctions and requires repair, the cured sealant cannot be removed without damage, necessitating destructive dismantling of the housing. This can render the entire housing unusable, leading to high maintenance costs and prolonged repair cycles. Another type is the bolt-fastened explosion-proof housing, which uses multiple high-strength bolts to rigidly lock the upper and lower housings, providing high explosion resistance. However, in field operations, opening and closing this type of housing requires disassembling and assembling numerous bolts individually, a cumbersome and time-consuming process. Furthermore, the bolts are prone to corrosion and jamming in long-term underground environments, further complicating opening. Finally, a snap-on quick-opening housing may be used, allowing for rapid opening and closing with a snap. However, due to the limited locking force of the snap, in the event of a short circuit and explosion, the high-pressure gas inside may force the snap open or even shatter the entire housing, failing to meet explosion-proof safety requirements.

[0004] Furthermore, existing protective enclosures generally lack fault status indication functionality. When a buried cable joint malfunctions, maintenance personnel cannot visually assess its status on the ground; they must dig up the soil to inspect it, resulting in relatively low inspection efficiency. Some solutions incorporate fault indicators within the enclosure, but these indicators are only observable on-site and still require excavation, failing to enable trenchless inspection. Simultaneously, existing protective devices are functionally limited, either providing only physical protection or merely possessing explosion-proof structures, lacking a design that systematically integrates protection, maintainability, and status awareness. In summary, current cable joint protective enclosures struggle to effectively reconcile the conflict between sealed protection and repeatable maintenance, and fail to balance explosion-proof and impact-resistant capabilities with convenient opening and closing operations. Summary of the Invention

[0005] This invention provides a reusable intelligent protective housing for cable joints, aiming to solve the problems in current cable joint protective housings where it is difficult to effectively coordinate the contradiction between sealing protection and reusable maintenance, and where it is difficult to balance explosion-proof and impact-resistant properties with convenient opening and closing operations.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: This invention provides a reusable cable joint intelligent protective housing, comprising an upper housing and a lower housing, wherein the upper housing and the lower housing are fastened together by a quick locking mechanism; The upper housing and / or lower housing are provided with cable inlet sealing structures at both ends, the cable inlet sealing structures include peelable flexible sealing materials; the upper housing and / or lower housing are provided with at least one pressure relief port, and a sealing plug that can automatically fall off under a preset pressure is provided in the pressure relief port; The upper and / or lower housings have a fault indicator mounting position inside and a wireless transmission module accommodating cavity on the outer wall; the fault indicator mounting position is used to fix the fault indicator, and the fault indicator is electrically connected to the wireless transmission module; the wireless transmission module accommodating cavity is used to accommodate the wireless transmission module.

[0007] In some embodiments, the quick-locking mechanism includes a plurality of quick-locking latches spaced apart along the length of the housing, and anti-loosening bolts at preset connection points; the quick-locking latches are used to achieve initial closure and pre-sealing of the housing, and the anti-loosening bolts are used to reinforce the preset sealing points.

[0008] In some embodiments, the cable inlet sealing structure includes: a multi-layer labyrinth sealing groove disposed at the end of the housing, a compression sealing strip embedded in the labyrinth sealing groove, and a peelable waterproof insulating putty covering the outer periphery of the cable.

[0009] In some implementations, the opening pressure threshold of the pressure relief port is controlled to be 0.5~1.5MPa, the sealing plug and the pressure relief port are fitted with a conical surface, and an O-ring is provided.

[0010] In some embodiments, the inner walls of the upper and / or lower housings are provided with a flame-retardant buffer layer, which is a replaceable intumescent flame-retardant pack or fireproof putty.

[0011] In some embodiments, a transparent viewing window is provided on the upper housing and / or the lower housing, the position of which corresponds to the fault indicator mounting position. The transparent viewing window is used to observe the flip-up status of the fault indicator without opening the housing.

[0012] In some embodiments, a reset operation hole is provided on the upper housing and / or the lower housing; the reset operation hole is sealed with a sealing plug so as to reset the fault indicator without opening the housing.

[0013] In some embodiments, the upper and lower shells are made of SMC composite material or glass fiber reinforced engineering plastic, with a static compressive strength of not less than 225 MPa and flame retardant performance reaching Class A.

[0014] In some implementations, the wireless transmitter module housing is provided with a waterproof connector; the waterproof connector is used to lead out a signal line to connect to a ground indicator light, or to house a built-in wireless transmitter antenna.

[0015] In some embodiments, the mating surfaces of the upper and lower housings are provided with locating pins and locating holes, which are used to assist the upper and lower housings in achieving a fastening connection.

[0016] Compared with the prior art, the present invention provides a reusable intelligent protective housing for cable intermediate joints, which has the following advantages: This invention achieves a high protection level of IP67 or higher through a labyrinth sealing groove, compression strips, and peelable sealant, ensuring relative dryness under long-term underground burial conditions. Simultaneously, the use of peelable flexible sealing material allows for easy replacement of the sealing material after a failure, making the housing reusable. A combination of quick-locking latches and anti-loosening bolts enables rapid opening and closing within 30 seconds, ensuring a pressure resistance of ≥225MPa during an explosion. The pressure relief port allows for directional energy release when internal pressure exceeds a threshold, preventing overall housing rupture. Furthermore, the housing integrates a fault indicator mounting position and a transparent observation window, allowing maintenance personnel to observe the fault indicator's status without digging up the soil. The wireless transmission module housing cavity provides a reserved interface for intelligent upgrades, enabling linkage with ground alarm units for remote alarm functionality. The flame-retardant buffer layer absorbs explosive shock waves and suppresses flame spread. The directional pressure relief function of the pressure relief port protects surrounding cables from secondary damage. The material itself achieves Class A flame retardancy, meeting power system safety requirements. In addition, the reset operation hole of the present invention allows maintenance personnel to manually reset the fault indicator without opening the housing; the wireless transmission module can be connected to ground indicator lights or smart ground stakes to realize trenchless inspection; the housing is designed to be repeatedly opened so that it does not need to be replaced after the fault is repaired. Attached Figure Description

[0017] The accompanying drawings are provided to further understand the invention and constitute a part of this invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0018] Figure 1 This is a three-dimensional structural diagram of a reusable cable joint intelligent protective housing according to the present invention. Figure 2 This is an exploded structural diagram of an intelligent protective housing for a reusable cable joint according to the present invention. Figure 3 This is a cross-sectional schematic diagram of the cable inlet sealing structure in an embodiment of the intelligent protective housing for a reusable cable joint according to the present invention.

[0019] The components are as follows: 1. Upper housing; 2. Lower housing; 3. Fault indicator; 4. Wireless transmission module; 5. Quick-lock latch; 6. Anti-loosening bolt; 7. Pressure relief port; 8. Sealing plug; 9. Transparent observation window; 10. Reset operation hole; 11. Cable inlet sealing structure; 12. Labyrinth sealing groove; 13. Compression sealing strip; 14. Positioning pin; 15. Positioning hole; 16. Waterproof insulating putty; 17. Sealing wing; 18. Cable. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0025] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0026] How can we provide a relatively intelligent protective device that can guarantee sealing and explosion-proof performance, allow for repeated opening and maintenance, and also have the ability to detect fault conditions?

[0027] Based on this, such as Figure 1 As shown, the present invention provides a reusable cable joint intelligent protective housing, including an upper housing 1 and a lower housing 2, wherein the upper housing 1 and the lower housing 2 are fastened together by a quick locking mechanism; The upper housing 1 and / or the lower housing 2 are provided with cable inlet sealing structures 11 at both ends. The cable inlet sealing structures 11 include peelable flexible sealing materials. The upper housing 1 and / or the lower housing 2 are provided with at least one pressure relief port 7. The pressure relief port 7 is provided with a sealing plug 8 that can automatically fall off under a preset pressure. The upper housing 1 and / or the lower housing 2 are provided with a fault indicator mounting position inside and a wireless transmission module accommodating cavity on the outer wall; the fault indicator mounting position is used to fix the fault indicator 3, and the fault indicator 3 is electrically connected to the wireless transmission module 4; the wireless transmission module accommodating cavity is used to accommodate the wireless transmission module 4.

[0028] The openable connection between the upper housing 1 and the lower housing 2 of this invention allows the housing to be easily opened after a cable joint failure, enabling inspection or troubleshooting of the internal joint. After repair, the housing can be re-fastened for continued use without destructive dismantling, achieving reuse of the protective housing and reducing the operation and maintenance costs and fault repair time of power lines. Simultaneously, by providing cable inlet sealing structures 11 containing peelable flexible sealing material at both ends of the housing, this invention achieves a reliable waterproof seal by compressing and deforming the flexible sealing material when the housing is fastened. When it is necessary to open the housing, the end seal constraint is released by peeling off the flexible sealing material, thus meeting the dual requirements of high-level sealing protection and convenient opening and closing.

[0029] In this invention, a reusable intelligent protective housing for cable joints is provided with a pressure relief port 7 and an internal sealing plug 8 that automatically detaches under a preset pressure. This design provides the housing with a relatively reliable directional pressure relief capability. When a short circuit explosion occurs in the internal cable joint, causing a sudden increase in pressure within the housing cavity, the sealing plug 8 automatically detaches and opens the pressure relief channel when the pressure reaches a preset threshold, releasing the high-pressure gas in a predetermined direction. This prevents the housing from rupturing due to excessive internal pressure. Furthermore, after pressure relief, only the sealing plug 8 needs to be replaced to restore the housing's explosion-proof function. The fault indicator mounting position and the wireless transmission module housing provide space for the fault indicator 3 and the wireless transmission module 4, allowing the fault status signal detected by the fault indicator 3 to be transmitted externally via the wireless transmission module 4.

[0030] In some operating conditions, the quick-locking mechanism of this invention consists of multiple quick-locking latches 5 spaced apart along the length of the housing and anti-loosening bolts 6 at preset connection points. The quick-locking latches 5 perform the function of initial closure and pre-sealing of the housing, while the anti-loosening bolts 6 reinforce the preset sealing points. The quick-locking latches 5 are easy to open and close without special tools, and the anti-loosening bolts 6 reinforce key stress points, avoiding the deficiency of insufficient latch locking force to withstand explosive impacts. This invention forms a multi-layered sealing mechanism through the synergistic effect of multiple labyrinth sealing grooves 12, compression sealing strips 13, and peelable waterproof insulating putty 16. The labyrinth sealing grooves 12 extend the path for moisture to seep in along the housing end; the compression sealing strips 13 are compressed and fill the labyrinth grooves after the housing is fastened to achieve an elastic seal; and the waterproof insulating putty 16 covering the outer periphery of the cable 18 seals the circumferential gap between the cable 18 and the housing end. Simultaneously, the peelable nature of this putty facilitates subsequent opening and maintenance.

[0031] Furthermore, this invention controls the opening pressure threshold of the pressure relief port 7 to 0.5-1.5 MPa, so that the sealing plug 8 can reliably maintain a sealed state during normal operation, and can fall off in time to achieve pressure relief when the fault explosion pressure reaches this threshold range; the conical mating structure between the sealing plug 8 and the pressure relief port 7 can achieve self-positioning and self-locking sealing when the sealing plug 8 is installed, and the use of O-rings further improves the airtight reliability under normal conditions; by setting a replaceable expandable flame-retardant bag or fireproof mud as a flame-retardant buffer layer on the inner wall of the shell, it can absorb the impact energy and suppress the spread of flames to the outside of the shell when an explosion occurs, so that the shell can restore its complete protective function by replacing the flame-retardant buffer layer after experiencing a fault pressure relief.

[0032] On the other hand, in some operating conditions, this invention, by setting transparent observation windows 9 on the upper housing 1 and / or lower housing 2 corresponding to the installation position of the fault indicator, allows maintenance personnel to directly observe the flip-up status of the fault indicator 3 inside the housing without opening the housing or digging out the overburden, realizing trenchless inspection in buried scenarios and improving inspection efficiency. This invention also features a reset operation hole 10 sealed with a sealing plug on the upper housing 1 and / or lower housing 2, allowing the fault indicator 3 to be manually reset through this operation hole after activation without opening the housing, maintaining the sealing integrity of the housing under normal conditions. Furthermore, this invention uses SMC composite materials or glass fiber reinforced engineering plastics to give the housing a static compressive strength of not less than 225 MPa and Class A flame retardant properties, ensuring the stability of the housing in buried environments.

[0033] Furthermore, this invention provides two flexible connection methods for the signal output of the wireless transmission module 4 by setting a waterproof connector in the housing cavity of the wireless transmission module. Specifically, the signal line can be led out through the waterproof connector to connect to a ground indicator light for intuitive ground alarm, or a built-in wireless transmission antenna can be used for remote wireless signal transmission. This allows the housing to be flexibly configured with external indicators or communication methods according to different site conditions and maintenance needs. This invention also provides a positioning pin 14 and a positioning hole 15 at the mating surface of the upper housing 1 and the lower housing 2. The guiding action of the positioning pin 14 and the positioning hole 15 assists in achieving precise alignment of the upper and lower housings during engagement, ensuring relatively uniform and reliable engagement and sealing.

[0034] The present invention provides a more detailed description of a reusable cable joint intelligent protective housing through specific embodiments.

[0035] Example 1 like Figure 1 and Figure 2 As shown, this embodiment provides a reusable cable joint intelligent protective housing, including an upper housing 1 and a lower housing 2. Both the upper housing 1 and the lower housing 2 are semi-cylindrical structures, molded from SMC composite material. The material has a tensile strength ≥520MPa, a static compressive strength ≥225MPa, and flame retardant performance reaching Class A. The mating surfaces of the upper housing 1 and the lower housing 2 are provided with positioning pins 14 and positioning holes 15, which are used to ensure positional accuracy during engagement. The mating surfaces are also provided with multiple labyrinth sealing grooves 12, in which hollow compression sealing strips 13 (optionally, silicone foam strips) are embedded. When the upper and lower housings are closed, the compression sealing strips 13 are compressed, filling the labyrinth grooves and forming watertight and airtight barriers.

[0036] The quick-locking mechanism includes three quick-lock latches 5 spaced apart along the length of the housing, and four anti-loosening bolts 6 at both ends and in the middle. The quick-lock latches 5 are made of stainless steel and are used to achieve initial closure and pre-sealing of the housing. The anti-loosening bolts 6 are used to reinforce key sealing points and prevent loosening due to material creep after long-term operation. The combined design of the quick-lock latches 5 and anti-loosening bolts 6 allows the housing to complete the opening and closing operation within 30 seconds, while meeting explosion-proof requirements.

[0037] like Figure 3 As shown, the intelligent protective housing for the reusable cable joint has cable inlet sealing structures 11 at both ends. The cable inlet sealing structure 11 includes multi-layer labyrinth sealing grooves 12, compression sealing strips 13, and peelable waterproof insulating putty covering the outer periphery of the cable. During installation, multi-layer waterproof insulating putty 16 is first wrapped around the cable 18, and then the housing is closed. The compression sealing strips 13 and the waterproof insulating putty 16 together form an end seal. A sealing wing 17 is also provided at the end of the housing. The sealing wing 17 extends outward from the end of the housing and fits snugly around the outer periphery of the cable 18 and the waterproof insulating putty 16. When the housing is closed, the sealing wing 17 is pressed between the end of the cable 18 and the housing, further blocking the path of moisture penetration along the surface of the cable 18. The waterproof insulating putty 16 has good peelability, allowing for easy cleaning and replacement during fault repair.

[0038] Two pressure relief ports 7 are provided on the top of the upper housing 1, and each pressure relief port 7 contains an automatically detachable sealing plug 8. The sealing plug 8 and the pressure relief port 7 are fitted with a conical surface and an O-ring seal to ensure a seal under normal conditions. The opening pressure threshold of the sealing plug 8 is set to 1.0 MPa. When the internal pressure exceeds this value, the sealing plug 8 is forced open, forming a pressure relief channel to release high-pressure gas in a directional manner, preventing the entire housing from bursting. After pressure relief, only the sealing plug 8 needs to be replaced, and the housing can be reused.

[0039] The inner wall of the upper housing 1 is provided with a fault indicator mounting position for fixing the fault indicator 3. The fault indicator 3 is a local short-circuit fault indicator with auxiliary contact output function. When a fault occurs, the fault indicator 3 flips up to show a red indicator, and the auxiliary contact closes simultaneously. A transparent observation window 9 is provided on the outer wall of the upper housing 1 corresponding to the fault indicator mounting position. The transparent observation window 9 is made of high-transmittance PC material with a light transmittance >90%, allowing maintenance personnel to observe the flip status of the fault indicator 3 without opening the housing in some operating conditions. The outer wall of the upper housing 1 also has a wireless transmission module housing cavity for accommodating the wireless transmission module 4, which is electrically connected to the fault indicator 3. The wireless transmission module 4 is connected to the auxiliary contact of the fault indicator 3. When the auxiliary contact closes, the wireless transmission module 4 is triggered and transmits a wireless alarm signal. The wireless transmission module 4 adopts a low-power design with a built-in battery life of no less than five years. The wireless transmission module housing cavity is equipped with a waterproof connector, which can lead out a signal line to connect to a ground indicator light, or it can have an internal antenna for wireless transmission.

[0040] The upper housing 1 has a reset operation hole 10 on its side wall, which corresponds to the reset button of the fault indicator 3 and is sealed with a sealing plug. To manually reset the fault indicator 3, simply open the sealing plug and press the reset button with a slender tool; there is no need to open the housing. The inner walls of the upper housing 1 and the lower housing 2 are also equipped with replaceable inflatable flame-retardant packs as flame-retardant buffer layers. Under normal conditions, the inflatable flame-retardant packs flexibly conform to the inner wall, absorbing impact energy and suppressing flame spread during an explosion. They can be easily replaced after fault repair.

[0041] Example 2 The difference between Embodiment 2 and Embodiment 1 is that the quick-locking mechanism only uses multiple quick-locking latches 5 and does not have anti-loosening bolts 6. The housing of Embodiment 2 is suitable for medium and low voltage cables and occasions with low explosion-proof requirements.

[0042] Example 3 The difference between Embodiment 3 and Embodiment 1 is that the cable inlet sealing structure 11 uses a prefabricated peelable waterproof insulating composite tape instead of waterproof insulating mortar. The shell installation of Embodiment 3 is relatively more convenient and can be applied to scenarios where on-site construction time is limited.

[0043] Example 4 The difference between this embodiment 4 and embodiment 1 is that only one pressure relief port 7 is provided, and the opening pressure threshold is adjusted to 0.5MPa. The shell of this embodiment 4 is suitable for occasions with low internal pressure.

[0044] Example 5 The difference between Embodiment 5 and Embodiment 1 is that the upper housing 1 and the lower housing 2 use glass fiber reinforced engineering plastics (PA6 and GF30) instead of SMC composite materials. The housing cost of Embodiment 5 is relatively lower and it can be used for the protection of non-critical lines.

[0045] In summary, this invention provides a reusable intelligent protective housing for cable joints, achieving a balance between rapid opening and closing and high-strength explosion-proof capabilities. Its multi-layered sealing structure balances high protection levels with maintainability. The integrated fault indicator and wireless transmission module provide an interface for intelligent inspection. This invention effectively balances the sealing and maintainability of the protective housing, coordinating explosion-proof and openable functions. Fault conditions can be perceived and inspected relatively intuitively. It is suitable for the protection of buried cable joints and possesses a certain degree of reliability. This invention is applied to the protection of buried cable joints at 10kV and 500kV voltage levels in power systems. Its structural design is relatively reasonable, its manufacturing process is mature, and its installation and maintenance are convenient. It can be directly applied in existing cable joint protection projects and has certain industrial applicability.

[0046] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Anyone skilled in the art can readily implement the present invention according to the description and above. Any modifications, alterations, or equivalent variations made using the technical content disclosed above are equivalent embodiments of the present invention. Furthermore, any modifications, alterations, or variations made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the present invention.

Claims

1. A reusable intelligent protective housing for cable joints, characterized in that, It includes an upper housing (1) and a lower housing (2), wherein the upper housing (1) and the lower housing (2) are fastened together by a quick locking mechanism; The upper housing (1) and / or the lower housing (2) are provided with cable inlet sealing structures (11) at both ends, the cable inlet sealing structures (11) include peelable flexible sealing material; the upper housing (1) and / or the lower housing (2) are provided with at least one pressure relief port (7), and the pressure relief port (7) is provided with a sealing plug (8) that can automatically fall off under a preset pressure. The upper housing (1) and / or lower housing (2) are provided with a fault indicator mounting position inside and a wireless transmission module accommodating cavity on the outer wall; the fault indicator mounting position is used to fix the fault indicator (3), and the fault indicator (3) is electrically connected to the wireless transmission module (4); the wireless transmission module accommodating cavity is used to accommodate the wireless transmission module (4).

2. The intelligent protective housing for a reusable cable joint as described in claim 1, characterized in that, The quick-locking mechanism includes multiple quick-locking latches (5) spaced apart along the length of the housing, and anti-loosening bolts (6) set at preset connection points; the quick-locking latches (5) are used to achieve initial closure and pre-sealing of the housing, and the anti-loosening bolts (6) are used to reinforce the preset sealing points.

3. The intelligent protective housing for a reusable cable joint as described in claim 1, characterized in that, The cable inlet sealing structure (11) includes: a multi-layer labyrinth sealing groove (12) disposed at the end of the housing, a compression sealing strip (13) embedded in the labyrinth sealing groove (12), and a peelable waterproof insulating putty (16) covering the outer periphery of the cable.

4. The intelligent protective housing for a reusable cable joint as described in claim 1, characterized in that, The opening pressure threshold of the pressure relief port (7) is controlled to be 0.5~1.5MPa. The sealing plug (8) and the pressure relief port (7) are connected by a conical surface and are provided with an O-ring seal.

5. The intelligent protective housing for a reusable cable joint as described in claim 1, characterized in that, The inner walls of the upper shell (1) and / or the lower shell (2) are provided with a flame-retardant buffer layer, which is a replaceable intumescent flame-retardant pack or fireproof putty.

6. The intelligent protective housing for a reusable cable joint as described in claim 1, characterized in that, A transparent observation window (9) is provided on the upper housing (1) and / or the lower housing (2). The position of the transparent observation window (9) corresponds to the installation position of the fault indicator. The transparent observation window (9) is used to observe the flip-up state of the fault indicator (3) without opening the housing.

7. The intelligent protective housing for a reusable cable joint as described in claim 1, characterized in that, The upper housing (1) and / or the lower housing (2) are provided with a reset operation hole (10); the reset operation hole (10) is sealed with a sealing plug so as to reset the fault indicator (3) without opening the housing.

8. The intelligent protective housing for a reusable cable joint as described in claim 1, characterized in that, The upper shell (1) and lower shell (2) are made of SMC composite material or glass fiber reinforced engineering plastic, with a static compressive strength of not less than 225MPa and flame retardant performance of Class A.

9. The intelligent protective housing for a reusable cable joint according to claim 1, characterized in that, The wireless transmitting module housing is equipped with a waterproof connector; the waterproof connector is used to lead out a signal line to connect to a ground indicator light, or to house a built-in wireless transmitting antenna.

10. The intelligent protective housing for a reusable cable joint according to claim 1, characterized in that, The mating surfaces of the upper housing (1) and the lower housing (2) are provided with positioning pins (14) and positioning holes (15), which are used to assist the upper housing (1) and the lower housing (2) in fastening together.

Images