Outdoor cold shrink terminal cable accessory

Abstract

The application discloses an outdoor cold shrink terminal head cable accessory, and relates to the field of cable accessories.The application comprises a cold shrink sleeve, a support sleeve installed inside below the cold shrink sleeve, a liquid injection channel arranged inside the support sleeve, and a deflation prompt assembly integrated outside the cold shrink sleeve.The liquid injection channel comprises a sealant injection assembly and a puncture connection assembly integrated on the support sleeve.The puncture connection assembly comprises a plurality of spring sheets installed on the inner wall of the support sleeve.The sealant injection assembly is integrated on the support sleeve, and the support sleeve is connected with the cold shrink sleeve to form a complete sealant injection channel.Sealant can be injected into the cold shrink sleeve through the sealant injection needle cylinder to assist in sealing.The injection pipe is arranged outside the support sleeve, the seal plug is installed on the injection head to manually close the sealant injection channel, and the injection head is opened again to open the sealant injection channel again when the sealant needs to be supplemented.

Description

Technical Field

[0001] This invention relates to the field of cable accessories, specifically an outdoor cold-shrink cable termination accessory. Background Technology

[0002] Cold-shrink cable terminations are key components used for connecting the ends of power cables. They are typically made of elastomer materials such as silicone rubber and EPDM rubber, utilizing the elastic memory effect of these materials for installation. In the factory, the elastomer material is injection-cured and expanded in diameter, then lined with a plastic spiral support to form a pre-expanded component. During field installation, the support is removed, and the pre-expanded component, relying on its own elastic recoil force, tightly wraps around the surface of the cable insulation layer, forming a durable seal and insulation interface.

[0003] However, traditional cold shrink tubing relies on radial pressure to achieve a seal, but in extreme outdoor environments or under long-term vibration and mechanical stress, physical compression alone may lead to seal failure due to material aging or deformation. A waterproof outdoor cold-shrink cable termination disclosed in CN120955547A includes an elastic sleeve, a first sealing air bladder, a second sealing air bladder, and a spiral support component. By forcing gas from the first sealing air bladder into the second sealing air bladder, the second sealing air bladder expands, making it difficult for rainwater to enter between the elastic sleeve and the cable, effectively preventing rainwater infiltration. However, the air seal relies on the air pressure inside the air bladder to maintain the seal. With long-term use, the air bladder material may leak due to aging, wear, or environmental factors, leading to seal failure after the air pressure drops. CN223942397U discloses a single-core indoor / outdoor cold-shrink terminal, comprising an insulating tube, a supporting core rope, and a rubber sleeve. By pressing the rubber sleeve, a sealing membrane is punctured, and waterproof adhesive in the chamber flows through a sliding tube and sleeve into the space between the insulating tube and the cable. The adhesive filling and bonding ensures the stability and service life of the cold-shrink terminal after installation. However, after the adhesive is filled, the injection channel is closed. If a sealing defect is found after injection, it cannot be remedied, requiring replacement of the entire cold-shrink terminal cable accessory, resulting in waste.

[0004] Therefore, there is an urgent need for an outdoor cold shrink cable accessory that can meet the requirements of multiple glue injections and improve the sealing effect of cold shrink terminals. Utility Model Content

[0005] The purpose of this invention is to provide an outdoor cold-shrink cable termination accessory to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an outdoor cold shrink termination cable accessory, including a cold shrink sleeve, a support sleeve installed inside the lower part of the cold shrink sleeve, a liquid injection channel disposed inside the support sleeve; and a venting indicator component integrated on the outside of the cold shrink sleeve. The injection channel includes a sealant injection assembly and a puncture connection assembly integrated on the support sleeve; The puncture connection assembly includes: a plurality of spring plates installed on the inner wall of the support sleeve; a puncture post fixed to the side of the spring plates facing the inner wall of the support sleeve; a puncture needle fixed to the side of the puncture post facing the inner wall of the support sleeve; and a plurality of fluid outlet holes opened in the middle and around the puncture needle. The sealant injection assembly includes: an output tube fixed below the puncture needle; an injection tube connected to the left side of the support sleeve; an injection head fixed to the inlet end of the injection tube; and a sealing plug threaded to the outside of the injection head.

[0007] As a further embodiment of the present invention, the sealant injection assembly further includes: a second ring tube fixed to the liquid outlet end of the injection tube; a first ring tube disposed above the second ring tube; and a connecting tube connecting the first ring tube and the second ring tube.

[0008] As a further embodiment of the present invention: the support sleeve includes: a support tube installed inside the lower part of the cold shrink sleeve; a support step disposed at the bottom of the support tube; and a humidity sensor embedded in the outer surface of the support tube.

[0009] As a further embodiment of the present invention, the puncture connection assembly further includes: a puncture hole opened at the connection between the support tube and the puncture column; a support spring connected between the spring sheet and the support tube; and a fixing screw installed at the end of the spring sheet.

[0010] As a further embodiment of the present invention: the support spring is sleeved on the outside of the puncture column, the fixing screw is threadedly connected to the support tube, and the injection channel is composed of an injection tube, a second ring tube, a connecting tube, a first ring tube, an output tube and a puncture needle connected in sequence, and the second ring tube, the connecting tube and the first ring tube are all embedded inside the support tube.

[0011] As a further embodiment of the present invention: the cold shrink tubing includes: a cold shrink tube; a skirt disposed on the upper outer side of the cold shrink tube; a sealing airbag fixed to the inner end face of the cold shrink tube; and a threaded tube support detachably connected to the inside of the cold shrink tube.

[0012] As a further embodiment of the present invention: a venting indicator component is provided on the lower outer side of the cold shrink tubing, the venting indicator component comprising: an indicator airbag disposed on the outer side of the cold shrink tubing and communicating with the sealing airbag; a first miniature duckbill valve disposed above the indicator airbag; and a second miniature duckbill valve disposed between the sealing airbag and the indicator airbag.

[0013] As a further aspect of the present invention: the air outlet of the second miniature duckbill valve faces the indicator airbag, and the length of the puncture needle is less than the thickness of the sealing airbag when it is inflated.

[0014] As a further embodiment of the present invention: a side clamping assembly is fixed above the supporting step, the side clamping assembly comprising: a support rod fixed above the supporting step; an outer clamping ring fixed above the support rod; a plurality of clamping springs embedded inside the outer clamping ring; a pressure plate fixed to the end of the clamping springs; and a guide groove formed at the connection between the pressure plate and the outer clamping ring.

[0015] As a further embodiment of the present invention: the support tube is provided with a cable connection assembly, the cable connection assembly including: a support ring fixedly installed on the bottom inner side of the support tube; an embedded ring fixed on the outer surface of the support ring; an embedded groove formed at the connection between the embedded ring and the support tube; a protective sleeve fixed above the support ring; a telescopic rod slidably connected inside the protective sleeve; a push ring fixed on the top of the telescopic rod; and a compensation ring threadedly connected inside the push ring.

[0016] Compared with the prior art, the beneficial effects of the present invention include: 1. The present invention integrates a sealant injection component on a support tube. After the support tube is connected to the cold shrink tubing, a complete sealant injection channel can be formed. The sealant can be injected into the cold shrink tubing through the injection syringe to assist in sealing. The injection tube is located outside the support tube. The sealing plug is installed on the injection head to manually close the sealant injection channel. When it is necessary to add sealant later, the injection head can be reopened to open the sealant injection channel again. 2. The present invention, through the puncture connection component, can squeeze the spring sheet under the action of the push ring, causing the end of the spring sheet to deform and squeeze the support spring, thereby driving the puncture needle on the puncture column to penetrate into the interior of the sealing airbag. Since the puncture needle has a liquid outlet hole, the puncture needle and the sealing airbag are connected. 3. This invention uses a cold shrink tubing in conjunction with a support tubing. The cold shrink tubing is fitted over the support tube and the cable, and the support tube is fitted over the cable. With the help of sealant, multiple sealing interfaces are formed between the cold shrink tubing and the support tube, between the support tube and the cable, and between the cold shrink tubing and the cable. Compared with the traditional cold shrink terminal head, which only has a single sealing interface between the cold shrink tubing and the cable, the reliability and sealing effect are stronger. 4. The present invention uses a deflator component. Since the sealing airbag and the indicator airbag are connected by a second micro duckbill valve, when the pressure of the sealing airbag increases, the gas inside the sealing airbag can enter the interior of the indicator airbag through the second micro duckbill valve. As the indicator airbag gradually expands, it can visually indicate whether the sealing airbag has been properly injected with sealant. 5. The present invention, through the cable connection assembly, can select compensation rings of different sizes, which facilitates the connection of the cable connection assembly with cables of different diameters, and avoids the inability to properly trigger the puncture connection assembly due to the small diameter of the cable. Under the action of the pushing ring, the puncture needle can be pushed outward. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure in this invention; Figure 2 This is a schematic diagram of a half-section structure in this invention; Figure 3 This is a schematic diagram of the support sleeve structure in this invention; Figure 4 This is a schematic diagram of a half-section of the support sleeve in this invention; Figure 5 This is a schematic cross-sectional view of the outer clamping ring in this invention; Figure 6 This is a schematic diagram of a half-section of the cold shrink tubing in this invention; Figure 7 This is a schematic diagram of the deflation indicator component in this invention; Figure 8 This is a schematic diagram of the sealant injection assembly in this invention; Figure 9 This is a partial cross-sectional structural diagram of the spring sheet in this invention.

[0018] In the diagram: 1. Cold shrink tubing; 101. Cold shrink tube; 102. Umbrella skirt; 103. Screw support; 104. Sealing airbag; 2. Support tubing; 201. Support tube; 202. Support step; 203. Humidity sensor; 3. Sealant injection assembly; 301. Output tube; 302. First ring tube; 303. Connecting tube; 304. Second ring tube; 305. Injection tube; 306. Injection head; 307. Sealing plug; 4. Puncture connection assembly; 401. Spring plate; 402. Support spring; 403. Puncture post; 404. Puncture. 405. Needle; 406. Puncture hole; 407. Fixing screw; 408. Discharge hole; 5. Side clamping assembly; 501. Outer clamping ring; 502. Support rod; 503. Pressure plate; 504. Guide groove; 505. Clamping spring; 6. Cable connection assembly; 601. Pushing ring; 602. Compensating ring; 603. Support ring; 604. Telescopic rod; 605. Protective sleeve; 606. Embedded ring; 607. Embedded groove; 7. Deflator indicator assembly; 701. Indicator airbag; 702. First miniature duckbill valve; 703. Second miniature duckbill valve. Detailed Implementation

[0019] To further illustrate the technical means and effects of the present invention in achieving the intended utility model objective, the following detailed description of the specific implementation methods, structure, features and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0020] Please see Figure 1-9 As shown, an outdoor cold shrink termination cable accessory includes a cold shrink sleeve 1, a support sleeve 2 installed inside the lower part of the cold shrink sleeve 1, an injection channel disposed inside the support sleeve 2, and a venting indicator component 7 integrated on the outside of the cold shrink sleeve 1. The injection channel includes a sealant injection assembly 3 and a puncture connection assembly 4 integrated on the support sleeve 2; The puncture connection assembly 4 includes: a plurality of spring plates 401 installed on the inner wall of the support sleeve 2; a puncture post 403 fixed to the spring plates 401 on the side facing the inner wall of the support sleeve 2; a puncture needle 404 fixed to the puncture post 403 on the side facing the inner wall of the support sleeve 2; and a plurality of fluid outlet holes 407 opened in the middle and around the puncture needle 404. The sealant injection assembly 3 includes: an output tube 301 fixed below the puncture needle 404; an injection tube 305 connected to the left side of the support sleeve 2; an injection head 306 fixed to the inlet end of the injection tube 305; and a sealing plug 307 threadedly connected to the outside of the injection head 306.

[0021] It should be noted that the cold shrink tubing 1 is used in conjunction with the support tubing 2. The cold shrink tubing 1 is fitted over the support tube 201 and the cable, and the support tube 201 is fitted over the cable. With the help of sealant, multiple sealing interfaces are formed between the cold shrink tubing 1 and the support tube 201, between the support tube 201 and the cable, and between the cold shrink tubing 1 and the cable. Compared with the traditional cold shrink terminal head, which only has a single sealing interface between the cold shrink tubing and the cable, the reliability and sealing effect are stronger.

[0022] The sealant injection assembly 3 further includes: a second ring tube 304 fixed to the liquid outlet end of the injection tube 305; a first ring tube 302 disposed above the second ring tube 304; and a connecting tube 303 connecting the first ring tube 302 and the second ring tube 304. The support sleeve 2 includes: a support tube 201 installed inside the lower part of the cold shrink sleeve 1; a support step 202 disposed at the bottom of the support tube 201; and a humidity sensor 203 embedded in the outer surface of the support tube 201.

[0023] It should be noted that the sealant injection component 3 is integrated into the support tube 201. After the support tube 201 is connected to the cold shrink tubing 1, it can form a complete injection channel. The sealant can be injected into the cold shrink tubing 1 through the injection syringe to assist in sealing. The injection tube 305 is located outside the support tube 2. The sealing plug 307 is installed on the injection head 306 to manually close the injection channel. When it is necessary to add sealant later, the injection head 306 can be reopened to open the injection channel again.

[0024] The puncture connection assembly 4 also includes: a puncture hole 405 opened at the connection between the support tube 201 and the puncture post 403; a support spring 402 connected between the spring plate 401 and the support tube 201; and a fixing screw 406 installed at the end of the spring plate 401. The support spring 402 is sleeved on the outside of the puncture post 403, and the fixing screw 406 is threadedly connected to the support tube 201. The injection channel is composed of an injection tube 305, a second ring tube 304, a connecting tube 303, a first ring tube 302, an output tube 301, and a puncture needle 404 connected in sequence. The second ring tube 304, the connecting tube 303, and the first ring tube 302 are all embedded inside the support tube 201.

[0025] It should be noted that the liquid outlet 407 located in the middle of the puncture needle 404 is used to inject sealant into the sealing airbag 104, while the liquid outlet 407 located around the puncture needle 404 is used to inject sealant between the inner wall of the cold shrink tube 101 and the outer sheath of the cable, and between the outer wall of the sealing airbag 104 and the outer wall of the support tube 201. After the puncture needle 404 punctures the sealing airbag 104, its length cannot puncture the cold shrink tube 101. By means of the puncture connection assembly 4, the spring sheet 401 can be squeezed under the action of the push ring 601, causing the end of the spring sheet 401 to deform and squeeze the support spring 402, which in turn drives the puncture needle 404 on the puncture column 403 to penetrate into the interior of the sealing airbag 104. Since the puncture needle 404 has a liquid outlet hole 407, the puncture needle 404 and the sealing airbag 104 are connected, thereby injecting the sealant into the interior of the sealing airbag 104. After injection, the sealant has excellent fluidity and can fill the interior of the sealing airbag 104. It can also penetrate and fill all the tiny gaps between the inner wall of the cold shrink tube 101 and the outer sheath of the cable, as well as between the outer wall of the sealing airbag 104 and the outer wall of the support tube 201 through the liquid outlet holes 407 around the perimeter. After curing, it forms a dense solid elastomer, which completely seals the potential penetration paths of gas, liquid or dust.

[0026] The cold shrink tubing 1 includes: a cold shrink tube 101; a skirt 102 disposed on the upper outer side of the cold shrink tube 101; a sealing airbag 104 fixed to the inner end face of the cold shrink tube 101; and a threaded tube support 103 detachably connected to the inside of the cold shrink tube 101. A deflation indicator component 7 is disposed on the lower outer side of the cold shrink tube 101. The deflation indicator component 7 includes: an indicator airbag 701 disposed on the outer side of the cold shrink tube 101 and communicating with the sealing airbag 104; a first miniature duckbill valve 702 disposed above the indicator airbag 701; and a second miniature duckbill valve 703 disposed between the sealing airbag 104 and the indicator airbag 701. The air outlet of the second miniature duckbill valve 703 faces the indicator airbag 701. The length of the puncture needle 404 is less than the thickness of the sealing airbag 104 when inflated.

[0027] It should be noted that the air inlet of the first miniature duckbill valve 702 and the second miniature duckbill valve 703 are open structures, while the air outlet is a closed structure. When the pressure increases, gas can be released through the air outlet of the duckbill valve. Through the set venting indicator component 7, since the sealing airbag 104 and the indicator airbag 701 are connected by the second miniature duckbill valve 703, when the pressure of the sealing airbag 104 increases, the gas in the sealing airbag 104 can enter the interior of the indicator airbag 701 through the second miniature duckbill valve 703. As the indicator airbag 701 gradually expands, it can be visually indicated whether the sealing airbag 104 has been properly injected with sealant. After the sealing airbag 104 is injected with sealant, in order to prevent the indicator airbag 701 from expanding and exploding, the first miniature duckbill valve 702 can be opened, and the gas in the indicator airbag 701 can be discharged outward through the first miniature duckbill valve 702.

[0028] A side clamping assembly 5 is fixed above the support step 202. The side clamping assembly 5 includes: a support rod 502 fixed above the support step 202; an outer clamping ring 501 fixed above the support rod 502; a plurality of clamping springs 505 embedded inside the outer clamping ring 501; a pressure plate 503 fixed to the end of the clamping spring 505; and a guide groove 504 opened at the connection between the pressure plate 503 and the outer clamping ring 501.

[0029] It should be noted that the side clamping assembly 5 is located outside the cold shrink tubing 1. When the cold shrink tubing 1 is installed, it is located between the support tube 201 and the outer clamping ring 501. At this time, the pressure plate 503 is close to the outer clamping ring 501. After the cold shrink tubing 1 is removed, it retracts and the clamping spring 505 elastically resets outward, thereby driving the pressure plate 503 to press the cold shrink tubing 101.

[0030] The support pipe 201 is internally provided with a cable connection assembly 6, which includes: a support ring 603 fixedly installed on the bottom inner side of the support pipe 201; an embedded ring 606 fixed on the outer surface of the support ring 603; an embedded groove 607 formed at the connection between the embedded ring 606 and the support pipe 201; a protective sleeve 605 fixed above the support ring 603; a telescopic rod 604 slidably connected inside the protective sleeve 605; a push ring 601 fixed on the top of the telescopic rod 604; and a compensation ring 602 threadedly connected inside the push ring 601.

[0031] It should be noted that the telescopic rod 604 and the protective sleeve 605 constitute a telescopic structure, and four sets are provided to connect the support ring 603 and the push ring 601. This allows the distance between the support ring 603 and the push ring 601 to be changed. The push ring 601 can slide along the axial direction of the support tube 201. When the push ring 601 gradually moves to the piercing connection assembly 4, it can squeeze the spring plate 401, triggering the piercing needle 404 to extend outward. The internal compensation ring 602 is provided with multiple specifications. Its outer diameter is adapted to the inner diameter of the push ring 601, and its inner diameter is adapted to the outer diameter of the cable. In use, the appropriate size of the compensation ring 602 can be selected according to the cable diameter. Through the cable connection assembly 6, different sizes of compensation rings 602 can be selected, which facilitates the connection of the cable connection assembly 6 with cables of different diameters. This avoids the inability to properly trigger the piercing connection assembly 4 due to the small cable diameter. Under the action of the push ring 601, the piercing needle 404 can be pushed outward.

[0032] Working principle: The support sleeve 2 is pre-fitted onto the cable. During installation, a matching compensation ring 602 is selected according to the cable diameter. The inner diameter of the compensation ring 602 matches the outer diameter of the cable, and the middle is sealed and fixed by a sealing strip. Then, the support tube 201 is passed through the outside of the compensation ring 602 until the inner push ring 601 reaches the position of the compensation ring 602. The support tube 201 is rotated, and the support tube 201 drives the telescopic rod 604 and the protective sleeve 605 to rotate through the support ring 603. This drives the push ring 601 at the end of the telescopic rod 604 to rotate along the axis of the support tube 201. At this time, the push ring 601 is threadedly connected to the compensation ring 602 until it is pressed against the top of the push ring 601. The support tube 201 slides on the cable. Since the telescopic rod 604 and the protective sleeve 605 can be stretched, there is a relative displacement between the push ring 601 and the support tube 201 until the push ring 601 moves to the position of the piercing connection assembly 4. As the support tube 201 continues to slide, the push ring 601 enters the inner side of the spring plate 401 and presses the spring plate 401. The support spring 402 on the side of the spring plate 401 is compressed inward, while the spring plate 401 simultaneously drives the puncture column 403 to penetrate the puncture hole 405. The end of the puncture needle 404 passes out of the puncture hole 405, through the outside of the support tube 201, and fills the space between the support tube 201 and the cable with sealant until it is completely fixed. The first sealing interface is formed between the support tube 201 and the cable. The cold shrink tubing 101 is fitted over the cable and overlaps the end of the support tube 201. After removing the screw support 103, the cold shrink tubing 101 shrinks inward until it is completely flush with the support tube 201. At this point, the end of the puncture needle 404 is inserted into the cavity of the sealing airbag 104. The sealing plug 307 is rotated and removed. The injection syringe is then connected to the injection head 306. The sealant passes sequentially through the injection head 306, injection tube 305, second ring tube 304, connecting tube 303, and first ring tube 305. 02 Enters the output tube 301 and enters the puncture needle 404 through the output tube 301. On the one hand, the sealant is injected into the interior of the sealing airbag 104 through the central through hole at the end of the puncture needle 404. On the other hand, the sealant is injected between the support tube 201 and the cold shrink tube 101 through the liquid outlet holes 407 around the puncture needle 404, thereby forming a second sealing interface between the support tube 201 and the cold shrink tube 101, and a third sealing interface between the sealing airbag 104 and the cable, which greatly improves the sealing effect. While injecting sealant into the sealing airbag 104, the air pressure of the sealing airbag 104 increases, and the gas inside enters the interior of the warning airbag 701 through the outlet of the second miniature duckbill valve 703. The deflated warning airbag 701 gradually expands. When it is necessary to release the gas inside the warning airbag 701, a rod-shaped tool can be inserted into the interior of the second miniature duckbill valve 703 to open the channel of the second miniature duckbill valve 703, so that the gas inside the warning airbag 701 can be released outward, thereby depressurizing the warning airbag 701. After the glue injection is completed, the sealing plug 307 can be rotated and reinstalled on the injection head 306. When additional glue is needed in the future, the injection head 306 can be reopened to open the glue injection channel again. The side clamping assembly 5 on the outside of the support tube 201 has a pressure plate 503 that is close to the outside of the cable. The outside of the pressure plate 503 is connected to the clamping spring 505, which compresses the clamping spring 505. Under the elastic action of the clamping spring 505, the cable and the cold shrink tube 101 are clamped and fixed from the outside.

[0033] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any indirect modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. An outdoor cold-shrink cable termination accessory, characterized in that, Includes a cold shrink tubing, a support sleeve installed inside the lower part of the cold shrink tubing, an injection channel disposed inside the support sleeve; and a venting indicator component integrated on the outside of the cold shrink tubing. The injection channel includes a sealant injection assembly and a puncture connection assembly integrated on the support sleeve; The puncture connection assembly includes: a plurality of spring plates installed on the inner wall of the support sleeve; a puncture post fixed to the side of the spring plates facing the inner wall of the support sleeve; a puncture needle fixed to the side of the puncture post facing the inner wall of the support sleeve; and a plurality of fluid outlet holes opened in the middle and around the puncture needle. The sealant injection assembly includes: an output tube fixed below the puncture needle; an injection tube connected to the left side of the support sleeve; an injection head fixed to the inlet end of the injection tube; and a sealing plug threaded to the outside of the injection head.

2. The outdoor cold-shrink cable termination accessory according to claim 1, characterized in that, The sealant injection assembly further includes: a second ring tube fixed to the liquid outlet end of the injection tube; a first ring tube disposed above the second ring tube; and a connecting tube connecting the first ring tube and the second ring tube.

3. The outdoor cold-shrink cable termination accessory according to claim 2, characterized in that, The support sleeve includes: a support tube installed inside the lower part of the cold shrink sleeve; a support step disposed at the bottom of the support tube; and a humidity sensor embedded in the outer surface of the support tube.

4. The outdoor cold-shrink cable termination accessory according to claim 3, characterized in that, The puncture connection assembly further includes: a puncture hole opened at the connection between the support tube and the puncture column; a support spring connected between the spring plate and the support tube; and a fixing screw installed at the end of the spring plate.

5. An outdoor cold-shrink cable termination accessory according to claim 4, characterized in that, The support spring is sleeved on the outside of the puncture column, the fixing screw is threaded to the support tube, and the injection channel is composed of an injection tube, a second ring tube, a connecting tube, a first ring tube, an output tube and a puncture needle connected in sequence, with the second ring tube, the connecting tube and the first ring tube all embedded inside the support tube.

6. The outdoor cold-shrink cable termination accessory according to claim 5, characterized in that, The cold shrink tubing includes: a cold shrink tube; an umbrella skirt disposed on the upper outer side of the cold shrink tube; a sealing airbag fixed to the inner end face of the cold shrink tube; and a threaded tube support detachably connected to the inside of the cold shrink tube.

7. An outdoor cold-shrink cable termination accessory according to claim 6, characterized in that, A venting indicator is provided on the lower outer side of the cold shrink tubing. The venting indicator includes: a venting airbag disposed on the outer side of the cold shrink tubing and communicating with the sealing airbag; a first miniature duckbill valve disposed above the venting airbag; and a second miniature duckbill valve disposed between the sealing airbag and the venting airbag.

8. An outdoor cold-shrink cable termination accessory according to claim 7, characterized in that, The outlet of the second miniature duckbill valve faces the indicator airbag, and the length of the puncture needle is less than the thickness of the sealing airbag when it is inflated.

9. An outdoor cold-shrink cable termination accessory according to claim 1, characterized in that, A side clamping assembly is fixed above the support step. The side clamping assembly includes: a support rod fixed above the support step; an outer clamping ring fixed above the support rod; a plurality of clamping springs embedded inside the outer clamping ring; a pressure plate fixed to the end of the clamping springs; and a guide groove formed at the connection between the pressure plate and the outer clamping ring.

10. An outdoor cold-shrink cable termination accessory according to claim 1, characterized in that, The support tube is internally provided with a cable connection assembly, which includes: a support ring fixedly installed on the bottom inner side of the support tube; an embedded ring fixed on the outer surface of the support ring; an embedded groove formed at the connection between the embedded ring and the support tube; a protective sleeve fixed above the support ring; a telescopic rod slidably connected inside the protective sleeve; a push ring fixed on the top of the telescopic rod; and a compensation ring threadedly connected inside the push ring.

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