Waterproof outdoor cold shrink cable terminal

Abstract

The invention relates to the technical field of cable accessories, in particular to a waterproof outdoor cold shrink cable terminal. The invention provides a waterproof outdoor cold shrink cable terminal. The waterproof outdoor cold shrink cable terminal comprises an elastic sleeve, a first sealing air bag, a spiral supporting piece, a second sealing air bag and a first connecting pipe. A first sealing air bag is fixedly connected in the elastic sleeve, a spiral supporting piece is arranged between the elastic sleeve and the first sealing air bag, a second sealing air bag is arranged on the lower portion in the elastic sleeve, and a first connecting pipe is connected between the first sealing air bag and the second sealing air bag. Through the design of the elastic sleeve, the first sealing air bag, the second sealing air bag and the spiral supporting piece, the spiral supporting piece is pulled out to squeeze air in the first sealing air bag into the second sealing air bag so as to enable the second sealing air bag to expand, and the second sealing air bag wraps the periphery of the cable; therefore, outside rainwater and the like are difficult to enter between the elastic sleeve and the cable, and rainwater infiltration is effectively prevented.

Description

Technical Field

[0001] This invention relates to the field of cable accessories technology, and in particular to a waterproof outdoor cold-shrink cable termination. Background Technology

[0002] Cold shrink cable terminations are components made by injection molding and vulcanizing elastomer materials in a factory. After diameter expansion and the addition of a spiral support, they form various cable accessories. During installation, the cold shrink cable termination is placed over the treated cable end or joint, and the internal spiral support is removed. The termination then shrinks and wraps around the cable due to its own elasticity. Cold shrink cable terminations have advantages such as small size, ease of operation, and no need for special tools, and are widely used in modern cable installation.

[0003] Existing cold shrink cable terminations are usually designed as separate units for easy installation, consisting of multiple parts. However, these parts rely solely on their own elasticity to shrink and wrap around each other for sealing, resulting in poor sealing performance. When used outdoors, the cable vibrates under wind conditions, causing the parts to shift and affecting the sealing effect, which can easily lead to water leakage. Summary of the Invention

[0004] To overcome the shortcomings of existing cold shrink cable terminations, which are based on a split structure and rely solely on elastic shrinkage for sealing, making them susceptible to component displacement due to wind vibration during outdoor use and thus affecting sealing performance, this invention provides a waterproof outdoor cold shrink cable termination.

[0005] The technical implementation scheme of the present invention is: a waterproof outdoor cold-shrink cable termination, comprising:

[0006] An elastic sleeve, wherein a first sealing airbag is fixedly connected inside the elastic sleeve, and a spiral support member is provided between the elastic sleeve and the first sealing airbag;

[0007] The second sealing airbag is located inside the lower part of the elastic sleeve. A first connecting tube is connected between the first sealing airbag and the second sealing airbag, and an installation groove is opened in the first connecting tube.

[0008] In a preferred embodiment of the present invention, it further includes:

[0009] A movable block is slidably connected to the first connecting pipe, and a connector is provided on the top of the movable block;

[0010] A compression spring is provided on the top of the lower side wall of the mounting groove inside the first connecting pipe, and the top of the compression spring is connected to the bottom of the connector.

[0011] In a preferred embodiment of the present invention, it further includes:

[0012] A guide rod is connected between the upper and lower side walls of the mounting groove, and the guide rod passes through the connector.

[0013] In a preferred embodiment of the present invention, it further includes:

[0014] A sealing ring is fixedly connected to the outside of the moving block.

[0015] In a preferred embodiment of the present invention, it further includes:

[0016] An inner convex ring is located at the bottom of the elastic sleeve;

[0017] An outer convex ring is provided on the top of the insulating sleeve, and the outer convex ring can cooperate with the inner convex ring.

[0018] In a preferred embodiment of the present invention, it further includes:

[0019] The umbrella skirt is fixedly connected to the outside of the elastic sleeve.

[0020] In a preferred embodiment of the present invention, it further includes:

[0021] A collar, wherein the collar is provided on the outer side of the umbrella skirt, and two collars are provided symmetrically, a protrusion is fixedly connected to one end of the collar, a groove is opened at one end of the collar, and an air hole is opened on the inner side wall of the groove;

[0022] The second connecting pipe is connected to the end of the air hole away from the groove;

[0023] The third sealing airbag is fixedly connected in the groove and connected to the end of the second connecting tube away from the air hole. The groove cooperates with the protrusion.

[0024] In a preferred embodiment of the present invention, it further includes:

[0025] The first magnetic block is disposed on the inner sidewall of the groove;

[0026] The second magnetic block is located at one end of the protrusion near the inner wall of the groove.

[0027] In a preferred embodiment of the present invention, it further includes:

[0028] A buffer pad is provided on the outside of the collar.

[0029] In a preferred embodiment of the present invention, it further includes:

[0030] An anti-slip ring is disposed between the collar and the umbrella skirt.

[0031] The beneficial effects of the present invention are as follows: 1. The design of the elastic sleeve, the first sealing airbag, the second sealing airbag and the spiral support member of the present invention, by pulling out the spiral support member, squeezes the gas of the first sealing airbag into the second sealing airbag to make the second sealing airbag expand, so that the second sealing airbag wraps around the cable, thereby making it difficult for external rainwater to enter between the elastic sleeve and the cable, effectively preventing rainwater from seeping in.

[0032] 2. The design of the moving block and compression spring in this invention allows the compression spring to drive the moving block upward after the air pressure stabilizes, so that the moving block returns to its original position to block the gas passage in the first connecting pipe, preventing the gas in the second sealing airbag from flowing back into the first sealing airbag, thereby maintaining the sealing effect.

[0033] 3. The design of the collar, second connecting tube, third sealing airbag, and protrusion in this invention allows the air inside the groove to be compressed when the protrusion is inserted into the groove. This compressed air is then forced into the third sealing airbag through the air hole at the bottom of the groove and the connected second connecting tube, causing the third sealing airbag to expand rapidly. The expanded third sealing airbag fits tightly against and presses against the gap between the groove and the protrusion, which not only provides a good seal but also increases the contact area between the two collars, significantly increasing the friction between the collars and thus greatly improving the stability and reliability of the connection in a fixed state. Attached Figure Description

[0034] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0035] Figure 2 This is a cross-sectional view of the elastic sleeve, the first sealing airbag, and the spiral support member of the present invention.

[0036] Figure 3 This is an enlarged view of the second sealing airbag and the first connecting tube of the present invention.

[0037] Figure 4 This is a schematic diagram of the structure of the connector, compression spring, and moving block of the present invention.

[0038] Figure 5 This is a schematic diagram of the umbrella skirt of the present invention.

[0039] Figure 6 This is a schematic diagram of the collar structure of the present invention.

[0040] Figure 7 This is a cross-sectional view of the collar of the present invention.

[0041] Figure 8 This is an enlarged view of the second connecting tube and the third sealing airbag of the present invention.

[0042] Figure 9 This is an enlarged view of the protrusion and the second magnetic block of the present invention.

[0043] The components are: 1. Elastic sleeve, 2. Spiral support, 3. First sealing airbag, 4. Second sealing airbag, 5. First connecting pipe, 6. Inner convex ring, 7. Outer convex ring, 8. Connector, 81. Guide rod, 9. Compression spring, 10. Moving block, 11. Sealing ring, 12. Umbrella skirt, 13. Collar, 14. Buffer pad, 15. Anti-slip ring, 16. First magnetic block, 17. Air hole, 18. Second connecting pipe, 19. Third sealing airbag, 20. Protrusion, 21. Second magnetic block. Detailed Implementation

[0044] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0045] A waterproof outdoor cold-shrink cable termination, such as Figures 1-3 As shown, it includes an elastic sleeve 1, a first sealing airbag 3, a spiral support 2, a second sealing airbag 4, and a first connecting tube 5. The elastic sleeve 1 is made of silicone rubber. Silicone rubber has good flexibility and elasticity, making it suitable for manufacturing cable terminations that need to fit tightly and adapt to different shapes and sizes. Silicone rubber also has excellent weather resistance and can resist the effects of ultraviolet rays, ozone, and extreme temperature changes. The first sealing airbag 3 is fixedly connected inside the elastic sleeve 1. The spiral support 2 is provided between the elastic sleeve 1 and the first sealing airbag 3. The second sealing airbag 4 is provided at the bottom inside the elastic sleeve 1. The first connecting tube 5 connects the first sealing airbag 3 and the second sealing airbag 4.

[0046] like Figure 4 As shown, it also includes a connector 8, a compression spring 9, and a moving block 10. The moving block 10 is slidably connected inside the first connecting pipe 5. The top of the moving block 10 is provided with the connector 8. An installation groove is opened inside the first connecting pipe 5. A compression spring 9 is provided on the top of the lower side wall of the installation groove. The top of the compression spring 9 is connected to the bottom of the connector 8. During the process of the first sealing airbag 3 pushing gas through the first connecting pipe 5 to the second sealing airbag 4, the pressure generated by the gas flow acts on the top of the moving block 10, pushing the moving block 10 to slide downward to make room for the gas passage in the first connecting pipe 5, so that the first connecting pipe 5 is open and the moving block 10 slides downward. In the middle, the connecting piece 8 moves downward, thereby squeezing the compression spring 9. After the air pressure tends to stabilize, the compression spring 9 drives the connecting piece 8 to move upward, thereby driving the moving block 10 to move upward, so that the moving block 10 returns to its original position to block the gas passage in the first connecting pipe 5, preventing the gas in the second sealing airbag 4 from flowing back into the first sealing airbag 3, so as to maintain the sealing effect. This realizes the control of unidirectional gas flow, which is suitable for long-term use in complex outdoor environments with wind and vibration. It effectively avoids the sealing failure problem caused by gas backflow or pressure fluctuation, and further improves the overall sealing performance and reliability of the cold shrink cable terminal.

[0047] like Figure 4 As shown, it also includes a guide rod 81, which is connected between the upper and lower side walls of the mounting groove. The guide rod 81 passes through the connector 8, and the compression spring 9 is sleeved on the outside of the guide rod 81. The guide rod 81 is used to guide and limit the sliding of the connector 8, ensuring that the connector 8 moves stably along a straight line.

[0048] like Figure 4 As shown, it also includes a sealing ring 11. The sealing ring 11 is fixedly connected to the outside of the moving block 10. When the moving block 10 moves upward, the sealing ring 11 will fit tightly against the lower part of the inner wall of the first connecting pipe 5. The sealing ring 11 is used to enhance the sealing between the moving block 10 and the inner wall of the first connecting pipe 5, further reduce the probability of backflow of gas in the second sealing airbag 4, and maintain the sealing effect.

[0049] like Figure 3 As shown, it also includes an inner convex ring 6 and an outer convex ring 7. The bottom of the elastic sleeve 1 is provided with an inner convex ring 6. The elastic sleeve 1 is connected to an outer insulating sleeve. The top of the insulating sleeve is provided with an outer convex ring 7 that can cooperate with the inner convex ring 6. During the installation process, the elastic sleeve 1 with the inner convex ring 6 is inserted into the outer insulating sleeve. When the outer insulating sleeve and the elastic sleeve 1 are connected, the inner convex ring 6 and the outer convex ring 7 are interlocked, increasing the contact area between the insulating sleeve and the elastic sleeve, thereby improving the sealing performance and reducing the risk of rainwater, moisture and other substances seeping in from the interface.

[0050] like Figure 1 As shown, it also includes a skirt 12. The skirt 12 is fixedly connected to the outside of the elastic sleeve 1. The skirt 12 can effectively prevent the formation of dirt flow and increase the maximum creepage distance.

[0051] like Figures 5-9As shown, it also includes a collar 13, a second connecting pipe 18, a third sealing airbag 19, and a protrusion 20. A collar 13 is provided on the outer side of the umbrella skirt 12. Two collars 13 are symmetrically arranged. One end of the collar 13 is fixedly connected to a protrusion 20. One end of the collar 13 has a groove, and an air hole 17 is opened on the inner wall of the groove. The end of the air hole 17 away from the groove is connected to the second connecting pipe 18. The third sealing airbag 19 is fixedly connected inside the groove. The end of the second connecting pipe 18 away from the air hole 17 is connected to the third sealing airbag 19. The groove and the protrusion 20 cooperate. When it is necessary to move the elastic sleeve 1, the collar 13 is placed on the outside of the umbrella skirt 12. The collar 13 can prevent the umbrella skirt 12 from directly contacting the external environment, effectively preventing damage due to friction or impact. The impact causes surface wear or structural damage, thus extending the service life of the terminal head; when the protrusion 20 is inserted into the groove, the air inside the groove is compressed and squeezed into the third sealing airbag 19 through the air hole 17 opened at the bottom of the groove and the connected second connecting pipe 18, causing the third sealing airbag 19 to expand rapidly; the expanded third sealing airbag 19 tightly adheres to and presses against the gap between the groove and the protrusion 20, which not only plays a good sealing role, but also further expands the contact area between the two rings 13, making the friction between them significantly increase, thereby greatly improving the stability and reliability of the connection part in the fixed state, especially suitable for outdoor use environments with complex working conditions such as wind vibration and temperature changes.

[0052] like Figure 4 As shown, it also includes a first magnetic block 16 and a second magnetic block 21. The first magnetic block 16 is provided on the inner wall of the groove, and the second magnetic block 21 is provided at one end of the protrusion 20 near the inner wall of the groove. When the protrusion 20 is inserted into the groove, the first magnetic block 16 and the second magnetic block 21 approach each other and generate an adsorption force under the action of magnetic force. This magnetic adsorption force makes the protrusion 20 more firmly embedded in the groove, thereby enhancing the connection strength and stability between the two sets of rings 13.

[0053] like Figure 6 As shown, it also includes a buffer pad 14. The buffer pad 14 is provided on the outside of the collar 13, so that when the collar 13 is hit, it can buffer the impact force, which helps to reduce the impact intensity transmitted to the internal components and protect the internal components from damage.

[0054] like Figure 6 As shown, it also includes an anti-slip ring 15. An anti-slip ring 15 is provided between the collar 13 and the umbrella skirt 12. The anti-slip ring 15 can increase the contact area between the collar 13 and the umbrella skirt 12, making the collar 13 and the umbrella skirt 12 fit more closely.

[0055] During operation, the terminal head is placed around the cable, and then the spiral support 2 is pulled out. The elastic sleeve 1 returns to its original shape due to its elasticity and contracts inward, thus tightly fitting the cable surface. At the same time, the contraction of the elastic sleeve 1 compresses the first sealing airbag 3, causing the gas inside the first sealing airbag 3 to enter the second sealing airbag 4 through the first connecting pipe 5. This causes the second sealing airbag 4 to expand, thus enveloping the cable and preventing rainwater and other external substances from entering between the elastic sleeve 1 and the cable. When used outdoors, this structure can reliably protect the cable from harsh conditions such as wind, rain, moisture, and possible vibration. The connection point maintains electrical performance and extends service life. During the process of the first sealing airbag 3 pushing gas through the first connecting pipe 5 to the second sealing airbag 4, the pressure generated by the gas flow acts on the top of the moving block 10, pushing it downwards to clear the gas passage in the first connecting pipe 5, thus opening the first connecting pipe 5. As the moving block 10 slides downwards, it drives the connecting piece 8 downwards, thereby compressing the compression spring 9. After the air pressure stabilizes, the compression spring 9 drives the connecting piece 8 upwards, thereby driving the moving block 10 upwards, returning it to its original position to block the gas passage in the first connecting pipe 5. The system prevents gas in the second sealing airbag 4 from flowing back into the first sealing airbag 3, maintaining a sealing effect and controlling unidirectional gas flow. This is suitable for long-term use in complex outdoor environments with wind and vibration, effectively avoiding sealing failure caused by gas backflow or pressure fluctuations, further improving the overall sealing performance and reliability of the cold-shrink cable termination. When the elastic sleeve 1 needs to be moved, the collar 13 is placed over the umbrella skirt 12. The collar 13 prevents the umbrella skirt 12 from directly contacting the external environment, effectively preventing surface wear or structural damage caused by friction or collision, thereby extending the service life of the termination. When the protrusion... When 20 is inserted into the groove, the air inside the groove is compressed and squeezed into the third sealing airbag 19 through the air hole 17 at the bottom of the groove and the connected second connecting pipe 18, causing the third sealing airbag 19 to expand rapidly. The expanded third sealing airbag 19 fits tightly against and presses against the gap between the groove and the protrusion 20, which not only plays a good sealing role, but also further expands the contact area between the two rings 13, which significantly increases the friction between them, thereby greatly improving the stability and reliability of the connection in the fixed state. It is especially suitable for outdoor use environments with complex working conditions such as wind vibration and temperature changes.

[0056] It should be understood that the above description is for illustrative purposes only and is not intended to limit the invention. Those skilled in the art will understand that variations of the invention are included within the scope of the claims herein.

Claims

1. A waterproof outdoor cold-shrink cable termination, characterized in that, include: An elastic sleeve (1) is provided with a first sealing airbag (3) fixedly connected inside the elastic sleeve (1), and a spiral support member (2) is provided between the elastic sleeve (1) and the first sealing airbag (3). The second sealing airbag (4) is located inside the lower part of the elastic sleeve (1). A first connecting tube (5) is connected between the first sealing airbag (3) and the second sealing airbag (4). An installation groove is opened in the first connecting tube (5).

2. The waterproof outdoor cold-shrink cable termination as described in claim 1, characterized in that, Also includes: The movable block (10) is slidably connected to the first connecting pipe (5), and the top of the movable block (10) is provided with a connector (8); Compression spring (9) is located on the top of the lower side wall of the mounting groove in the first connecting pipe (5), and the top of the compression spring (9) is connected to the bottom of the connector (8).

3. A waterproof outdoor cold-shrink cable termination as described in claim 2, characterized in that, Also includes: Guide rod (81) is connected between the upper and lower side walls of the mounting groove and passes through the connector (8).

4. A waterproof outdoor cold-shrink cable termination as described in claim 3, characterized in that, Also includes: A sealing ring (11) is fixedly connected to the outside of the movable block (10).

5. A waterproof outdoor cold-shrink cable termination as described in claim 4, characterized in that, Also includes: An inner convex ring (6) is provided at the bottom of the elastic sleeve (1); The outer convex ring (7) is connected to the outer insulating sleeve of the elastic sleeve (1). The outer convex ring (7) is located on the top of the insulating sleeve and can cooperate with the inner convex ring (6).

6. A waterproof outdoor cold-shrink cable termination as described in claim 5, characterized in that, Also includes: A canopy skirt (12) is fixedly connected to the outside of an elastic sleeve (1).

7. A waterproof outdoor cold-shrink cable termination as described in claim 6, characterized in that, Also includes: A collar (13) is provided on the outside of the umbrella skirt (12). Two collars (13) are provided symmetrically. A protrusion (20) is fixedly connected to one end of the collar (13). A groove is opened at one end of the collar (13). An air hole (17) is opened on the inner side wall of the groove. The second connecting pipe (18) is connected to the end of the air hole (17) away from the groove; The third sealing airbag (19) is fixedly connected in the groove. The third sealing airbag (19) is connected to the end of the second connecting pipe (18) away from the air hole (17). The groove is matched with the protrusion (20).

8. A waterproof outdoor cold-shrink cable termination as described in claim 7, characterized in that, Also includes: The first magnetic block (16) is disposed on the inner sidewall of the groove; The second magnetic block (21) is located at one end of the protrusion (20) near the inner wall of the groove.

9. A waterproof outdoor cold-shrink cable termination as described in claim 8, characterized in that, Also includes: A buffer pad (14) is provided on the outside of the collar (13).

10. A waterproof outdoor cold-shrink cable termination as described in claim 9, characterized in that, Also includes: Anti-slip ring (15), which is disposed between collar (13) and umbrella skirt (12).

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