A cable joint boot

Abstract

This application relates to the field of electrical equipment protection, and in particular to a cable joint protective cover, comprising a wedge-shaped cover consisting of a top plate and two symmetrically arranged right-angled trapezoidal side plates. A first partition plate is provided inside the cover, extending axially along the cover and inclined, with its two ends connected to the inner walls of the two side plates respectively. The inclination direction of the first partition plate is such that its height is lower near the larger diameter end of the cover, gradually increasing towards the smaller diameter end. A first hot air channel is formed between the first partition plate and the top plate, creating a first pressure reduction zone at the larger diameter end of the cover to guide hot air out directionally. This protective cover can protect the cable joint, effectively preventing it from being violently impacted or maliciously damaged by external objects, while also improving the heat dissipation performance of the cover, thereby effectively preventing the cable's insulation performance from deteriorating due to high temperatures.

Description

Technical Field

[0001] This application relates to the field of electrical equipment protection, and in particular to a cable joint protective cover. Background Technology

[0002] As modern society becomes increasingly reliant on electricity, power systems are expanding in scale, and cables are being used more and more widely. From urban skyscrapers to remote rural areas, from industrial factories to households, cables are ubiquitous. Cable joints, as critical connection points in cable lines, directly affect the overall performance and operational safety of the cable. Effective cable joint protection can significantly reduce damage from external factors, lower the failure rate, extend the cable's lifespan, and thus improve the economic and social benefits of the power system. Currently, cable joint protection typically employs protective covers that provide physical protection against environmental damage. These covers are mainly composed of a top plate and two side plates, enclosed by precise welding or robust bolt connections, creating a closed and sturdy structure with a hollow cavity. High-strength metal materials such as stainless steel and aluminum alloys are used. The protective cover protects the cable joint within its hollow cavity, effectively preventing it from being subjected to violent impacts and malicious damage from external objects. However, existing protective covers still have significant shortcomings in practical applications. Due to insufficient heat dissipation design, the heat generated by the cable joints cannot be dissipated in time, easily accumulating and forming high temperatures. This high temperature condition not only seriously affects the service life of the cable, causing a sharp decline in its insulation performance, accelerating cable aging, increasing maintenance costs and replacement frequency, but also poses significant safety hazards. Utility Model Content

[0003] To ensure that the protective cover can protect the cable joint, effectively prevent the cable joint from being violently impacted and maliciously damaged by external objects, improve the heat dissipation performance of the protective cover, and thus effectively prevent the cable insulation performance from deteriorating and the cable aging from being accelerated due to high temperature, this application provides a cable joint protective cover.

[0004] This application provides a cable joint protective cover, including a wedge-shaped cover body formed by a top plate and two symmetrically arranged right-angled trapezoidal side plates. A first partition plate is provided inside the cover body, extending axially along the cover body and inclined, with its two ends connected to the inner walls of the two side plates respectively. The inclination direction of the first partition plate is such that the side closer to the larger diameter end of the cover body is lower than the side closer to the smaller diameter end, gradually increasing towards the smaller diameter end. A first hot air channel is formed between the first partition plate and the top plate, and this hot air channel forms a first pressure reduction zone at the larger diameter end of the cover body, used to guide hot air to be directionally discharged from the larger diameter end. By adopting the above technical solution, the cover body has a wedge-shaped structure, formed by a top plate and two symmetrically arranged right-angled trapezoidal side plates, a shape that can better adapt to different installation spaces and cable routing. An inclined first partition plate is installed inside the enclosure, with its height lower near the large-diameter end and gradually increasing towards the small-diameter end. Hot air generated by the cable joint rises, while cold air flows in from both the large and small-diameter ends. Due to the inclined guiding effect of the first partition plate, the hot air inside the enclosure is lifted by the cold air. A first hot air channel is formed between the first partition plate and the top plate. At the large-diameter end of the enclosure, the channel space suddenly increases, creating a first pressure reduction zone according to fluid mechanics principles. This pressure reduction zone lowers the hot air pressure, causing it to naturally flow from the higher-pressure area to the lower-pressure area, thus guiding the hot air to be continuously and directionally discharged from the large-diameter end of the enclosure. This directional heat dissipation method effectively and promptly dissipates the heat generated by the cable joint, preventing heat accumulation and high temperatures within the enclosure. This effectively reduces the insulation performance degradation caused by high temperatures, slows down cable aging, reduces maintenance costs and replacement frequency, and significantly reduces safety hazards caused by high temperatures. Preferably, the enclosure further includes a second partition plate, which extends axially along the enclosure and is inclined, with its two ends connected to the inner walls of the two side plates respectively. The inclination direction of the second partition plate is such that the height of the side near the smaller diameter end of the enclosure is lower than the height of the side near the larger diameter end, gradually increasing towards the larger diameter end. A second hot air channel is formed between the second partition plate and the top plate, forming a second pressure reduction zone at the smaller diameter end of the enclosure to guide hot air to be directionally discharged from the smaller diameter end. A hollow diversion zone is formed between the first partition plate and the second partition plate. By adopting the above technical solution, a second partition plate extending axially and inclined within the enclosure is provided, with its two ends connected to the inner walls of the two side plates. When the hot air generated by the cable connector rises, due to the inclined arrangement of the second partition plate, the height of the side near the smaller diameter end is lower, gradually increasing towards the larger diameter end. During the rising process, the hot air is also guided by the second partition plate to flow towards the smaller diameter end of the enclosure.In this process, the second hot air channel formed between the second partition plate and the top plate creates a second pressure reduction zone at the small-diameter end of the cover. Based on the principle that gas flows from a high-pressure area to a low-pressure area, the hot air is directionally guided to exit from the small-diameter end of the cover. Simultaneously, a hollow diversion zone is formed between the first and second partition plates. This allows the originally upward-flowing hot air to be diverted within the hollow diversion zone, preventing excessive concentration of hot air and resulting in excessively high local temperatures. This further optimizes the heat dissipation path and effect, effectively solving the problem of insufficient heat dissipation design in existing protective covers. It reduces the impact of high temperatures caused by heat accumulation on cable lifespan, slows down the rate of cable insulation performance degradation and aging, reduces maintenance costs and replacement frequency, and eliminates safety hazards caused by high temperatures. Preferably, the top plate is provided with a hollow tube bundle corresponding to the hollow diversion zone.

[0005] By adopting the above technical solution, vertical hollow tube bundles are set in the top plate corresponding to the hollow diversion zone. Since hot air has the characteristic of rising, the contact area between hot air and the external environment is increased in the hollow tube bundles, which is more conducive to heat dissipation.

[0006] Preferably, the first partition plate and the bottom edge of the side plate, and the second partition plate and the bottom edge of the side plate, both form an angle of 8°-20°. By adopting the above technical solution, the first partition plate and the bottom edge of the side plate, and the second partition plate and the bottom edge of the side plate both form an angle of 8°-20°. This angle range allows the first and second partition plates to be in a suitable tilt state. A suitable tilt angle helps to form a stable and reasonable hollow flow-diverting zone between the first and second partition plates, which is beneficial for the diversion of hot air, thereby effectively improving the heat dissipation efficiency of the cable joint protective cover and reducing the adverse effects of high temperatures caused by heat accumulation on the cable joint. Preferably, the first partition plate and the second partition plate are symmetrically arranged. By adopting the above technical solution, when the first and second partition plates are symmetrically arranged, they form a first hot air channel and a second hot air channel with the top plate, respectively. Each partition plate also forms a pressure-reducing zone at different diameter ends of the cover to guide the hot air out. This symmetrical arrangement makes the structure and layout of the two hot air channels more uniform. Thus, when guiding the hot air flow, the airflow distribution on both sides is more balanced, thereby achieving a better directional hot air discharge effect and ensuring the uniformity and efficiency of heat dissipation within the entire cable joint protection cover. Preferably, the gap between the first and second hot air channels is 30mm-100mm. By adopting the above technical solution, limiting the gap between the first and second hot air channels to 30mm-100mm, if the gap is less than 30mm, the channel is too narrow, increasing the resistance during hot air flow, which is not conducive to the rapid discharge of hot air, leading to heat accumulation and difficulty in achieving a good heat dissipation effect. If the gap is greater than 100mm, the channel is too wide, slowing down the hot air flow and preventing the effective formation of a directional hot airflow, which also affects the heat dissipation efficiency. Controlling the gap between 30mm and 100mm ensures smooth airflow within the channel while maintaining a suitable flow velocity. This facilitates the directional discharge of hot air from both ends of the cover, thereby improving the heat dissipation performance of the cable joint protective cover. Preferably, the top plate and the bottom edge of the side plate form an angle of 5°-15°. By adopting the above technical solution, the top plate forms an angle of 5°-15° with the bottom edge of the side plate, giving the top plate a specific inclined state. This inclined structure changes the flow path and spatial distribution of hot air within the cover. When the cable joint generates hot air during operation, the space formed by this angle allows the hot air to flow upwards along the top plate and accumulate. During the upward movement of the hot air, the inclined top plate effectively reduces airflow resistance, allowing the hot air to flow more smoothly and facilitating its concentration and discharge at a suitable location, thus achieving better heat dissipation. Preferably, the top plate and both side plates are fireproof boards.By adopting the above technical solution, the top plate and both side plates use fireproof boards. These fireproof boards have excellent flame-retardant properties and are not easily ignited when exposed to a fire source, effectively preventing the spread of fire and thus avoiding damage to the cable joints due to fire. This improves the safety of the cable joints in fire situations and ensures the stable operation of the entire cable system. Preferably, the side walls of the side plates are equipped with explosion-proof glass panels. By adopting the above technical solution, when the pressure inside the enclosure suddenly increases due to abnormal conditions, the pressure will impact the explosion-proof glass panels. Because the explosion-proof glass panels have a certain pressure resistance, they can withstand the pressure while preventing the enclosure from bursting due to excessive pressure. Compared to the case without explosion-proof glass panels, this avoids the enclosure directly bursting and causing fragments to fly and injure surrounding personnel and equipment, ensuring the safety of using the cable joint protective cover. Preferably, the explosion-proof glass panels are sandwich glass panels. By adopting the above technical solution, the sandwich glass panel is made of two or more layers of glass with a transparent polymer film sandwiched between them. This structure allows the glass panel to be held together by the polymer film even if it breaks when subjected to external impact, preventing the fragments from flying everywhere and injuring people. At the same time, it can maintain a certain degree of integrity and continue to block the impact of external objects. Compared with ordinary glass, it can better meet the explosion-proof performance requirements of cable joint protective covers and further improve the overall explosion-proof performance of the protective cover.

[0007] In summary, this application includes at least one of the following beneficial technical effects:

[0008] 1. An inclined first partition plate is provided inside the cover, which forms a first hot air channel with the top plate and a first pressure reduction zone at the large diameter end of the cover. This can guide hot air to be discharged directionally from the large diameter end of the cover, solve the problem of insufficient heat dissipation of existing protective covers, avoid heat accumulation, and ensure the service life of the cable.

[0009] 2. It can dissipate the heat generated by the cable joint in a timely manner, avoiding the decline in cable insulation performance and accelerated aging due to high temperature, thus reducing maintenance costs and replacement frequency;

[0010] 3. Improve the operating temperature environment of the cable and reduce safety hazards caused by high temperature. Attached Figure Description

[0011] Figure 1 This is an exploded view of a cable connector protective cover in use according to Embodiment 1;

[0012] Figure 2 This is a right view of a cable connector protective cover in use according to Embodiment 1;

[0013] Figure 3 yes Figure 2 AA cross-section view;

[0014] Figure 4 This is a cross-sectional view of a cable joint protective cover according to Embodiment 2;

[0015] Figure 5 This is a cross-sectional view of a cable joint protective cover according to Embodiment 3;

[0016] Figure 6 This is a cross-sectional view of a cable connector protective cover according to Embodiment 4.

[0017] Explanation of reference numerals in the attached drawings: 1. Cover; 2. First partition plate; 3. Second partition plate; 4. First hot air passage; 5. First depressurization zone; 6. Second hot air passage; 7. Second depressurization zone; 8. Hollow flow distribution zone; 9. Hollow tube bundle; 11. Top plate; 12. Side plate. Detailed Implementation

[0018] The following is in conjunction with the appendix Figures 1-6 This application will be described in further detail.

[0019] Example 1

[0020] Embodiment 1 of this application provides a cable joint protective cover, which is described in reference to... Figure 1 and Figure 2 The enclosure includes a cover 1, a first partition plate 2, and a second partition plate 3. The cover 1 is a wedge-shaped structure with a small diameter end at one end and a large diameter end at the other end. It includes a rectangular top plate 11 and two right-angled trapezoidal side plates 12. The long side of the top plate 11 and the hypotenuse of the two symmetrically arranged right-angled trapezoidal side plates 12 are connected and enclose to form a cavity. The first partition plate 2 and the second partition plate 3 are arranged inside the cover 1 along the length direction of the cover 1 and are both extended along the length direction of the cover 1 and are inclined. The first partition plate 2 is arranged at the large diameter end of the cover 1, and the second partition plate 3 is arranged at the small diameter end of the cover 1. The two ends of the two partition plates are respectively connected to the inner walls of the two side plates 12. First, install both ends of the cable onto a horizontally positioned aluminum plate using cable clamps. The aluminum plate has a textured surface to prevent cable movement. Then, install the cover 1 onto the aluminum plate along the length of the cable, so that the cable joint is protected within the cover 1. The two ends of the cable are located on one side of the large-diameter end and the small-diameter end of the cover 1, respectively. The length direction, axial direction of the cover 1, and cable length direction are all the same.

[0021] Specifically, the top plate 11 is a flat structure made of fireproof board, specifically magnesium oxide fireproof board, which has good fire resistance and can effectively prevent the spread of fire from damaging the cable joints. The right-angled trapezoidal side plate 12 is also made of fireproof board. Its shape is a right-angled trapezoid, which, together with the top plate 11, forms a wedge-shaped cover 1. The two side plates 12 are symmetrically arranged, and the side plates 12 and the top plate 11 are connected by a frame. The frame is used to connect the side plates 12 and the top plate 11, as well as the side plates 12 and the aluminum plate. The frame is made of stainless steel.

[0022] The top plate 11 and the bottom edge of the side plate 12 form an angle of 5°-15°. This angle helps to form a wedge-shaped cover 1 structure, which allows hot air to flow and gather better inside the cover 1, further improving heat dissipation efficiency.

[0023] Furthermore, an explosion-proof glass panel is provided on the side wall of the side panel 12. The explosion-proof glass panel is a sandwich glass panel, which has good explosion-proof performance. When an accidental explosion occurs inside the enclosure 1, it can effectively prevent glass fragments from flying and injuring people. The explosion-proof glass panel is hinged to the enclosure 1 through a tension rod structure.

[0024] Specifically, the first partition plate 2 is an inclined plate made of fire-resistant board to ensure the fire resistance of the entire protective cover. The first partition plate 2 is inclined with its height lower near the larger diameter end of the cover 1, gradually increasing towards the smaller diameter end of the cover 1. The first partition plate 2 forms an angle of 8°-20° with the bottom edge of the side plate 12. This angle range can effectively guide the flow of hot air. For example, when the angle is 16°, the upward force of hot air and the smoothness of its flow within the channel are relatively balanced. The two ends of the first partition plate 2 are fixed to the inner walls of the two side plates 12 by bolts to ensure its stability.

[0025] Reference Figure 3 Specifically, a first hot air channel 4 is formed between the first partition plate 2 and the top plate 11. The first hot air channel 4 forms a first pressure reduction zone 5 at the large diameter end of the cover 1, which can guide the hot air to be discharged directionally from the large diameter end of the cover 1. Because the hot air rises due to heat and flows along the inclined first partition plate 2, the pressure in the first pressure reduction zone 5 at the large diameter end decreases, and the hot air is more easily discharged, thereby achieving effective heat dissipation and avoiding heat accumulation that affects the performance of the cable joint.

[0026] The gap size of the first hot air channel 4 is 30mm-100mm, which ensures that the hot air has enough space to flow. When the cable joint generates heat during operation, the hot air rises and enters the first hot air channel 4. Due to the inclined setting of the first partition plate 2, the hot air flows along the channel towards the larger diameter end. In the first pressure reduction zone 5 at the larger diameter end, the hot air pressure decreases, making it easier to expel from the cover 1, thereby carrying away the heat generated by the cable joint and reducing the temperature inside the cover 1.

[0027] Specifically, the second partition plate 3 is inclined with a lower height near the small-diameter end of the cover 1, gradually increasing in height towards the large-diameter end of the cover 1. A second hot air channel 6 is formed between the second partition plate 3 and the top plate 11. The second hot air channel 6 forms a second pressure-reducing zone 7 at the small-diameter end of the cover 1, which guides hot air to be discharged directionally from the small-diameter end of the cover 1. A hollow diversion zone 8 is formed between the first partition plate 2 and the second partition plate 3. Cold air flows in from the large-diameter end of the cover 1 and the position below the corresponding small-diameter partition plate, respectively, compressing the hot air inside the cover 1 and lifting the hot air through the hollow diversion zone 8. Then, it flows to the first hot air channel 4 and the second hot air channel 6, respectively, and then flows out of the cover 1 through the corresponding first pressure-reducing zone 5 and the second pressure-reducing zone 7 above the two partition plates, thereby achieving heat dissipation.

[0028] Specifically, the second partition plate 3 also forms an angle of 8°-20° with the bottom edge of the side plate 12, and the first partition plate 2 and the second partition plate 3 are symmetrically arranged. The gap size of the second hot air channel 6 is also 30mm-100mm, which can ensure the smooth flow of hot air in the channel.

[0029] The gap size of the hot air channel in this embodiment is designed according to the size of the cable joint. In other embodiments, the gap size of the hot air channel can be adjusted according to the actual cable joint size to ensure that the hot air can flow smoothly in the channel. The implementation principle of this embodiment is as follows: The cover 1 is wedge-shaped with a small diameter at one end and a large diameter at the other end. It is formed by a rectangular top plate 11 and two symmetrical right-angled trapezoidal side plates 12. The bottom edges of the top plate 11 and the side plates 12 form an angle of 5°-15°. Stainless steel frames are provided on the four sides of the side plates 12 and the top plate 11 for connection and installation. An inclined first partition plate 2 and a second partition plate 3 are provided axially inside the cover 1. The first partition plate 2 is at the large diameter end, and the second partition plate 3 is at the small diameter end. They are symmetrically arranged with an angle of 8°-20° to the bottom edge of the side plates 12 and are connected to the inner wall of the side plates 12 by bolts. The first partition plate 2 and the top plate 11 form a first hot air channel 4. The large diameter end forms a first pressure reduction zone 5 to guide the hot air to be discharged in a directional manner. The channel gap is 30mm. 100mm; the second partition plate 3 and the top plate 11 form a second hot air channel 6, and the small-diameter end forms a second pressure reduction zone 7. The space between the two partition plates is a hollow diversion zone 8. Cold air flows into the enclosure 1, and the cold air compresses and lifts the hot air, which flows out through the two hot air channels and the two pressure reduction zones to achieve heat dissipation. In addition, the side wall of the side plate 12 is equipped with a sandwich glass explosion-proof plate hinged by a tension rod structure, which can prevent fragments from flying and injuring people during an explosion. The protective cover of this structure can not only protect the cable joint, effectively prevent the cable joint from being violently impacted and maliciously damaged by external objects, but also improve the heat dissipation performance of the protective cover, thereby effectively preventing problems such as the decrease in insulation performance of the cable and accelerated cable aging caused by high temperature.

[0030] Example 2

[0031] The difference between this embodiment and Embodiment 1 is that, referring to... Figure 4 The second partition plate 3 at the small-diameter end of the cover 1 extends all the way to the inner wall of the top plate 11, which facilitates heat dissipation and better adapts to different scenarios. Everything else is the same as in Embodiment 1.

[0032] Example 3

[0033] The difference between this embodiment and Embodiment 1 is that, referring to... Figure 5 A hollow tube bundle 9 is provided on the top plate 11 corresponding to the hollow diversion area 8. The hollow tube bundle 9 is vertically arranged and connected to the first hot air channel 4 and the second hot air channel 6. The hollow tube bundle 9 can be connected to the top plate 11 by a bracket or welded to the top plate 11 as a whole, as long as a reliable connection can be achieved. In this way, some of the hot air can be dissipated through the hollow tube bundle 9, further improving the heat dissipation efficiency. Everything else is the same as in Embodiment 1.

[0034] Example 4

[0035] The difference between this embodiment and Embodiment 1 is that, referring to... Figure 6 A hollow tube bundle 9 is provided on the top plate 11 corresponding to the hollow diversion zone 8. The hollow tube bundle 9 is a square pipe. The two sides of the hollow tube bundle 9 are respectively sealed and connected to the first partition plate 2 and the second partition plate 3. Hot air rises from the hollow diversion zone 8 into the hollow tube bundle 9, so that all the hot air is dissipated through the hollow tube bundle 9. Accordingly, there is no need to set the top plate 11 for sealing. The side plate 12 is adapted to be connected to the side of the first partition plate 2 and the second partition plate 3. Everything else is the same as in Embodiment 1.

[0036] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A cable joint protective cover, characterized in that, It includes a wedge-shaped cover (1), which is formed by a top plate (11) and two symmetrically arranged right-angled trapezoidal side plates (12); The cover (1) is provided with a first partition plate (2), which extends along the axial direction of the cover (1) and is inclined, with its two ends connected to the inner walls of the two side plates (12) respectively; The first partition plate (2) is tilted in the following direction: the height of the side closer to the large diameter end of the cover (1) is lower than the height of the side closer to the small diameter end of the cover (1), and gradually increases towards the small diameter end of the cover (1). A first hot air channel (4) is formed between the first partition plate (2) and the top plate (11). The first hot air channel (4) forms a first pressure reduction zone (5) at the large diameter end of the cover (1) to guide hot air to be discharged directionally from the large diameter end of the cover (1).

2. The cable joint protective cover according to claim 1, characterized in that, The cover (1) is also provided with a second partition plate (3), which extends along the axial direction of the cover (1) and is inclined, with its two ends connected to the inner walls of the two side plates (12) respectively; The second partition plate (3) is tilted in the following direction: the height of the side near the small diameter end of the cover (1) is lower than the height of the side near the large diameter end of the cover (1), and gradually increases towards the large diameter end of the cover (1). A second hot air channel (6) is formed between the second partition plate (3) and the top plate (11). The second hot air channel (6) forms a second pressure reduction zone (7) at the small diameter end of the cover (1) to guide hot air to be discharged directionally from the small diameter end of the cover (1). A hollow diversion zone (8) is formed between the first partition plate (2) and the second partition plate (3).

3. The cable joint protective cover according to claim 2, characterized in that, The top plate (11) is provided with a hollow tube bundle (9) corresponding to the hollow diversion area (8).

4. The cable joint protective cover according to claim 2, characterized in that, The first partition plate (2) and the bottom edge of the side plate (12), and the second partition plate (3) and the bottom edge of the side plate (12) all form an angle of 8°-20°.

5. The cable joint protective cover according to claim 2, characterized in that, The first partition plate (2) and the second partition plate (3) are arranged symmetrically.

6. The cable joint protective cover according to claim 2, characterized in that, The gap between the first hot air channel (4) and the second hot air channel (6) is 30mm-100mm.

7. The cable joint protective cover according to claim 1, characterized in that, The top plate (11) and the bottom edge of the side plate (12) form an angle of 5°-15°.

8. The cable joint protective cover according to claim 1, characterized in that, The top plate (11) and the two side plates (12) are both fireproof boards.

9. The cable joint protective cover according to claim 1, characterized in that, The side wall of the side plate (12) is provided with an explosion-proof glass plate.

10. The cable joint protective cover according to claim 9, characterized in that, The explosion-proof glass panel is a sandwich glass panel.

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