10KV outdoor cold-shrink cable terminal with high sealing performance

Abstract

The utility model relates to the technical field of cold-shrink outdoor terminal heads, and discloses a high-sealing 10KV outdoor cold-shrink cable terminal head, which comprises a cold-shrink outdoor terminal arranged on a cable, and the cold-shrink outdoor terminal comprises a cold-shrink three-branch sleeve and a plurality of cold-shrink tubes. The intersection areas between the branch parts of the cold-contraction three-branch sleeve and the cold-contraction pipes and between the cold-contraction pipes are intersection parts, the structures, located on the inner side and the outer side, in the intersection parts are respectively called an inner pipe and an outer pipe, a sealing mechanism is arranged on any intersection part, and the sealing mechanism comprises an outer attaching pipe attached to the outer side of the outer pipe, and an inner attaching pipe attached to the outer side of the outer pipe; the inner sticking pipe is arranged on the outer side of the cold shrinkage three-branch sleeve in a sticking manner; the two ends of the umbrella-shaped exhaust sleeve are fixedly connected to the outer attaching pipe and the inner attaching pipe respectively. The supporting joint strips are arranged on the outer side wall of the inner joint pipe; wherein a gap is formed between the two supporting joint strips, so that the umbrella-shaped exhaust sleeve is communicated with the intersection part through the gap, and the problems that the intersection part of existing equipment is poor in sealing performance and not waterproof are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to cold shrink outdoor terminal head technical field, concretely is a kind of high sealing 10KV outdoor cold shrink cable terminal head. BACKGROUND

[0002] Cold shrink outdoor terminal is an important component in power cable line, for realizing the connection of cable and outdoor overhead line or other electrical equipment. It is mainly composed of cold shrink insulation tube, stress control tube, sealing element and other parts. Its installation principle is to use the high elasticity of high molecular materials such as silicone rubber to pre-expand these components and sleeve them on the support tube in the factory. During on-site installation, only the support tube needs to be pulled out, and these components will automatically shrink and tightly fit on the cable and connection part under the action of elasticity, forming good insulation and sealing effect. This terminal head is suitable for outdoor environment, and can effectively resist the erosion of ultraviolet rays, rain, dust and other harsh natural conditions on the cable connection part, ensuring the stability and safety of power transmission.

[0003] In the field of power transmission, outdoor terminal head as a key component of power cable and overhead line connection, its performance directly affects the safe and stable operation of power system. In the field of intelligent monitoring type cold shrink outdoor terminal head, the existing technology has achieved certain results. For example, the technical solution of a 35kV cold shrink outdoor cable terminal with publication number CN104269808A adopts the way of wrapping multiple cold shrink tubes outside the cable to realize the protection and connection of cable terminal. However, this existing technology has many defects.

[0004] When the device is in use, the connection method at the intersection of the two cold shrink tubes is relatively simple, and there is a lack of effective sealing and fixing structure, which causes poor sealing, and external moisture, dust and other impurities are easy to invade, affecting the normal operation and service life of the cable. UTILITY MODEL CONTENTS

[0005] (I) Technical problem solved

[0006] In view of the shortcomings of the prior art, the utility model provides a kind of high sealing 10KV outdoor cold shrink cable terminal head, with the advantages of good sealing effect and waterproof, solves the problem of poor sealing and non-waterproof of the intersection of existing equipment.

[0007] (II) Technical scheme

[0008] In order to achieve the above object, the utility model provides the following technical scheme: a kind of high sealing 10KV outdoor cold shrink cable terminal head, including the cold shrink outdoor terminal being arranged on cable, the cold shrink outdoor terminal includes cold shrink three support and multiple section cold shrink tube, the intersection area between the branch of cold shrink three support and cold shrink tube, cold shrink tube and cold shrink tube is intersection part, the structure in inner and outer sides in intersection part is called inner tube and outer tube respectively, sealing mechanism is provided on any intersection part, and the sealing mechanism includes:

[0009] Outer tube, is attached to the outside of the outer tube;

[0010] Inner tube, is attached and arranged on the outside of the cold shrink three support;

[0011] Umbrella-shaped exhaust jacket, two ends are fixedly connected on the outer tube and inner tube respectively;

[0012] Supporting strip, a plurality of are arranged on the outer wall of the inner tube;

[0013] Wherein, gap is provided between the two supporting strips, so that the umbrella-shaped exhaust jacket is communicated with the intersection part through the gap;

[0014] It should be noted that when the branch of cold shrink three support and cold shrink tube, cold shrink tube and cold shrink tube are installed, first, the inner tube is sleeved on the outside of the inner tube, then the supporting strip is extracted, then the outer tube is sleeved on the outside of the inner tube, then the supporting strip is extracted, then a part of air in the umbrella-shaped exhaust jacket is exhausted, then the outer tube is sleeved on the outer tube, then the supporting strip is extracted, and finally the cavity of the umbrella-shaped exhaust jacket is connected to the gap of the intersection part, so that the umbrella-shaped exhaust jacket can suck the air in the expansion part into the umbrella-shaped exhaust jacket through the gap between the plurality of supporting strips, so as to ensure the air tightness of the intersection part, and the umbrella-shaped exhaust jacket is arranged in umbrella-shaped form, which can further prevent rainwater from entering, thereby reducing electrical failure.

[0015] Preferably, the bottom of the inner tube is fixedly connected with an L-shaped sealing sheet, the bottom plate of the L-shaped sealing sheet is not attached and arranged below the bottom of the outer tube, and an exhaust valve is arranged on the umbrella-shaped exhaust jacket for exhausting air in the umbrella-shaped exhaust jacket.

[0016] Need to explain, before installing the sealing mechanism, the air inside the umbrella-shaped exhaust sleeve is discharged a part, makes the umbrella-shaped exhaust sleeve in compression state, like this after the gas is produced in the intersection, after the air is discharged into the inside of the umbrella-shaped exhaust sleeve, the umbrella-shaped exhaust sleeve expands, can be turned over to the upside by the person, thereby can make the bottom of the outer tube and the L-shaped sealing sheet extrusion fit, then through the artificial extrusion umbrella-shaped exhaust sleeve and open the exhaust valve, thereby can discharge the air inside the umbrella-shaped exhaust sleeve, makes the umbrella-shaped exhaust sleeve can repeatedly discharge the air of the expansion place.

[0017] Preferably, the inner wall of the inner tube is fixedly provided with a pressure sensor, so that the pressure sensor is attached to the outer wall of the inner tube.

[0018] Need to explain, when the pressure sensor detects that the sealing property is poor, the relevant warning device can send a prompt.

[0019] Preferably, the umbrella-shaped exhaust sleeve, the outer tube and the inner tube are made of high polymer and high elasticity material such as silicone rubber.

[0020] Need to explain, the outer tube and the inner tube are expanded and sleeved on the support tube in production, and in the present installation, only the outer tube is sleeved on the outer tube, the umbrella-shaped exhaust sleeve is sleeved on the inner tube, and then the support tube is pulled out, so that the outer tube and the inner tube are automatically contracted and closely attached to the outer tube and 201 under the elastic action, thereby forming a good sealing property.

[0021] Preferably, the inner wall of the inner tube is fixedly provided with at least one inner convex ring, the outer wall of the inner tube is fixedly provided with at least one outer convex ring, each inner convex ring corresponds to an outer convex ring, the inner convex ring and the outer convex ring are equal in number and one-to-one corresponding attachment, and the inner convex ring and the outer convex ring are attached.

[0022] Preferably, the support strip is made of rubber material.

[0023] Preferably, the edge of the umbrella-shaped exhaust sleeve is provided with a waterproof flange, the waterproof flange extends away from the intersection, and the inner side of the waterproof flange is closely attached to the edge of the umbrella-shaped exhaust sleeve, further enhancing the blocking ability of rainwater and reducing the risk of rainwater entering the intersection.

[0024] (Three) beneficial effects

[0025] Compared with the prior art, the utility model provides a kind of high sealing property 10KV outdoor cold shrink cable terminal, with following beneficial effects:

[0026] 1. The high sealing 10KV outdoor cold shrink cable terminal head, a sealing mechanism composed of an outer tube, an inner tube, an umbrella-shaped exhaust sleeve and a support tape is arranged, dynamic sealing and directional exhaust of the cross part are realized, double effects of air leakage prevention and water prevention are achieved, the outer tube and the inner tube are made of high-elasticity materials such as silicone rubber, are automatically shrunk after being pulled out through the support tube during installation, are tightly attached to the inner tube and the outer tube to form initial sealing, the umbrella-shaped exhaust sleeve is connected to the cross part through the gap of the support tape, can accommodate the gas generated by the expansion of the cross part in a high-temperature environment, avoids damage to the sealing due to excessively high air pressure, and naturally blocks rainwater from entering at the same time, the gap reserved by the support tape provides a channel for gas flow, and ensures that the expanded gas smoothly enters the exhaust sleeve, the design solves the problem that the cross part of the traditional terminal head is prone to gas leakage due to thermal expansion, realizes self-adaptation of the sealing performance to environmental changes, and significantly improves the air tightness and water resistance during outdoor use.

[0027] 2. The high sealing 10KV outdoor cold shrink cable terminal head, L-shaped sealing sheets are arranged on the inner tube, and an exhaust valve is arranged on the umbrella-shaped exhaust sleeve, so that the repeated exhaust function of the sealing mechanism is realized, long-term stable sealing effect is achieved, the umbrella-shaped exhaust sleeve is in a shrunk state after pre-evacuating air during installation, and can absorb air and expand after gas is generated at high temperature, when the exhaust sleeve expands, the outer tube bottom is extruded and attached to the L-shaped sealing sheet by manually turning up the exhaust sleeve, and then the gas is discharged through the exhaust valve to restore the shrunk state, the design breaks through the limitation of one-time sealing of the traditional sealing structure, can repeatedly use the air capacity of the exhaust sleeve through manual operation, avoids sealing failure caused by long-term air accumulation in the cross part, prolongs the service life of the terminal head, and reduces operation and maintenance costs.

[0028] 3. The high sealing 10KV outdoor cold shrink cable terminal head, a pressure sensor is arranged on the inner wall of the inner tube and attached to the outer wall of the inner tube, so that real-time monitoring of the sealing performance of the cross part is realized, and early warning effect of faults is achieved, the pressure sensor can accurately capture the pressure change between the inner tube and the inner tube, when the sealing performance decreases and micro-leakage occurs, the pressure data anomaly will trigger the warning device, the design makes up for the defect that the sealing failure of the traditional terminal head is difficult to be found in time, can timely warn at the initial stage of gas leakage, facilitates targeted processing by operation and maintenance personnel, avoids electrical faults such as reduction of insulation capacity and flashover caused by deterioration of sealing performance, and improves the safety and reliability of the cable line operation. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a structure schematic view when the cold shrink outdoor terminal of the utility model is installed on a cable.

[0030] Figure 2 It is a structure schematic view of the cable.

[0031] Figure 3 It is a structure schematic view of the cold shrink outdoor terminal.

[0032] Figure 4 It is the structure isometric section view schematic diagram when the cold shrink outdoor terminal is installed on the cable.

[0033] Figure 5 It is the structure schematic diagram of the cold shrink outdoor terminal.

[0034] Figure 6 It is another angle structure schematic diagram of the cold shrink outdoor terminal.

[0035] Figure 7 It is the structure isometric section view schematic diagram when the cold shrink outdoor terminal is installed on the cable.

[0036] Figure 8 It is another angle structure isometric section view schematic diagram of the cold shrink outdoor terminal.

[0037] Figure 9 It is the structure schematic diagram when the sealing mechanism is installed in the cold shrink outdoor terminal.

[0038] Figure 10 It is the structure schematic diagram when the sealing mechanism is installed in the cold shrink outdoor terminal.

[0039] Figure 11 It is the structure schematic diagram when the sealing mechanism is installed in the cold shrink outdoor terminal.

[0040] Figure 12 It is the structure schematic diagram when the sealing mechanism is installed in the cold shrink outdoor terminal. Figure 11 It is the structure enlarged schematic diagram of A.

[0041] Figure 13 It is the structure isometric section view schematic diagram of the sealing mechanism.

[0042] In the figure: 100, cable; 110, outer sheath; 120, steel armor; 130, inner sheath; 140, filling layer; 150, copper shielding layer; 160, semiconductor layer; 170, insulating layer; 180, core;

[0043] 200, cold shrink outdoor terminal; 201, inner tube; 202, outer tube; 210, cold shrink three supporting sleeve; 220, cold shrink insulating tube; 230, cold shrink terminal head; 240, cold shrink sealing tube; 250, wiring terminal;

[0044] 300, sealing mechanism; 310, umbrella-shaped exhaust sleeve; 320, outer adhesive tube; 330, inner adhesive tube; 340, supporting adhesive strip; 350, L-shaped sealing sheet; 360, exhaust valve; 370, inner convex ring; 380, outer convex ring. DETAILED DESCRIPTION

[0045] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described, obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0046] In the description of the present application, it should be understood that the directions or positional relationships indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular direction, be constructed and operated in a particular direction, and therefore cannot be understood as limiting the present application.

[0047] In addition, fixed connection refers to the connection of parts or components after being fixed without any relative movement; transmission connection refers to a connection mode of transmitting mechanical movement or torque to other working components through a transmission member; sliding connection refers to a connection mode in which two objects are in contact but not fixed, and can slide relative to each other; and rotating connection refers to a connection mode in which two objects are in contact but not fixed, and can rotate relative to each other.

[0048] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0049] Embodiment one:

[0050] The present embodiment provides a high-sealing 10KV outdoor cold-shrink cable terminal head, which has the following technical features.

[0051] Please refer to Figures 1-13 A high-sealing 10KV outdoor cold-shrink cable terminal head, comprising a cold-shrink outdoor terminal 200 arranged on a cable 100, the cold-shrink outdoor terminal 200 comprising a cold-shrink three-branch sleeve 210 and a plurality of cold-shrink pipes, the branch of the cold-shrink three-branch sleeve 210 and the intersection area between the cold-shrink pipes and the cold-shrink pipes are intersection parts, the structures inside and outside the intersection parts are respectively called inner pipe 201 and outer pipe 202, and a sealing mechanism 300 is arranged on any intersection part, the sealing mechanism 300 comprises:

[0052] An outer adhesive pipe 320 is attached to the outer side of the outer pipe 202; An outer adhesive pipe 320 is attached to the outer side of the outer pipe 202;

[0053] The inner adhesive tube 330 is arranged on the outside of the cold shrink three-branch sleeve 210;

[0054] The umbrella-shaped exhaust sleeve 310 is fixedly connected to the outer adhesive tube 320 and the inner adhesive tube 330 at both ends;

[0055] The support adhesive strips 340 are arranged on the outer wall of the inner adhesive tube 330;

[0056] The gap is arranged between the two support adhesive strips 340, so that the umbrella-shaped exhaust sleeve 310 communicates with the intersection through the gap;

[0057] It should be noted that when the branch of the cold shrink three-branch sleeve 210 and the cold shrink tube, the cold shrink tube and the cold shrink tube are installed, the inner adhesive tube 330 is first sleeved on the outside of the inner tube 201, the support strip is pulled out, then the outer tube 202 is sleeved on the outside of the inner adhesive tube 330, the support strip is pulled out, then a part of the air in the umbrella-shaped exhaust sleeve 310 is exhausted, the outer adhesive tube 320 is sleeved on the outer tube 202, the support strip is pulled out, and finally the cavity of the umbrella-shaped exhaust sleeve 310 is connected to the gap of the intersection. In this way, after the cable terminal works for a long time in a high-temperature environment, the intersection will expand to generate gas. At this time, the umbrella-shaped exhaust sleeve 310 in the contracted state can suck the air at the expansion position into the umbrella-shaped exhaust sleeve 310 through the gap between the plurality of support adhesive strips 340, thereby ensuring the air tightness of the intersection. In addition, the umbrella-shaped exhaust sleeve 310 is arranged in the umbrella-shaped form, which can further prevent rainwater from entering, thereby reducing electrical faults.

[0058] In an optional embodiment, the L-shaped sealing sheet 350 is fixedly connected to the bottom of the outer side of the inner adhesive tube 330. The bottom plate of the L-shaped sealing sheet 350 is arranged below the bottom of the outer tube 202. The umbrella-shaped exhaust sleeve 310 is provided with an exhaust valve 360 for exhausting the air in the umbrella-shaped exhaust sleeve 310;

[0059] It should be noted that before installing the sealing mechanism 300, a part of the air in the umbrella-shaped exhaust sleeve 310 is exhausted, so that the umbrella-shaped exhaust sleeve 310 is in a compressed state. In this way, after the intersection expands to generate gas, the air can be exhausted into the inside of the umbrella-shaped exhaust sleeve 310. After the umbrella-shaped exhaust sleeve 310 expands, the umbrella-shaped exhaust sleeve 310 can be turned upward by artificial extrusion, so that the bottom of the outer tube 202 is extruded and adhered to the L-shaped sealing sheet 350. Then, the umbrella-shaped exhaust sleeve 310 is extruded by artificial extrusion and the exhaust valve 360 is opened, so that the air in the umbrella-shaped exhaust sleeve 310 is exhausted, and the umbrella-shaped exhaust sleeve 310 can repeatedly exhaust the air at the expansion position.

[0060] In an optional embodiment, a pressure sensor is fixedly arranged on the inner wall of the inner adhesive tube 330, so that the pressure sensor is attached to the outer wall of the inner tube 201, and the sealing between the inner adhesive tube 330 and the inner tube 201 can be detected by the pressure sensor.

[0061] It should be noted that when the pressure sensor detects poor sealing, a related warning device can issue a prompt.

[0062] In an optional embodiment, the umbrella-shaped exhaust cover 310, the outer adhesive tube 320, and the inner adhesive tube 330 are made of high-molecular high-elasticity materials such as silicone rubber.

[0063] It should be noted that the outer adhesive tube 320 and the inner adhesive tube 330 are pre-expanded and fitted on the support tube during production. During the current installation, only the outer adhesive tube 320 is fitted on the outer tube 202, and the umbrella-shaped exhaust cover 310 is fitted on the inner tube 201. Then, the support tube is extracted, and the outer adhesive tube 320 and the inner adhesive tube 330 will automatically shrink and tightly attach to the outer tube 202 and 201 under the elastic action, thereby forming good sealing.

[0064] In an optional embodiment, at least one inner convex ring 370 is fixedly arranged on the inner wall of the inner adhesive tube 330, and at least one outer convex ring 380 is fixedly arranged on the outer wall of the inner tube 201. Each inner convex ring 370 corresponds to an outer convex ring 380. The number of inner convex rings 370 and outer convex rings 380 is equal and one-to-one corresponding.

[0065] In an optional embodiment, the support adhesive strip 340 is made of rubber material.

[0066] In an optional embodiment, the edge of the umbrella-shaped exhaust cover 310 is provided with a waterproof flange, which extends away from the intersection. The inner side of the waterproof flange is tightly attached to the edge of the umbrella-shaped exhaust cover 310, further enhancing the blocking ability of rainwater and reducing the risk of rainwater entering the intersection.

[0067] Working principle: the high sealing 10KV outdoor cold shrink cable terminal head realizes dynamic sealing through the cooperation of the sealing mechanism 300 and the cross part structure: during installation, first, the inner tube 330 is sleeved on the outside of the inner tube 201 of the cross part, and after the support tube is pulled out, the inner tube 330 is shrunk by the elasticity of the silicone rubber, and the inner wall convex ring 370 is matched with the outer convex ring 380 of the inner tube 201 to form the basic inner sealing; then, the outer tube 202 is sleeved on the outside of the inner tube 330, and the support tube is pulled out, then the pre-expanded umbrella-shaped exhaust sleeve 310 is connected with the inner tube 330 and the outer tube 320 to be installed respectively, and the air is discharged to make the umbrella-shaped exhaust sleeve 310 in a compressed state, finally, the outer tube 320 is sleeved on the outside of the outer tube 202, and the support tube is pulled out, and the outer tube 320 is shrunk to form the basic outer sealing, and the gap between the support strips 340 makes the cavity of the umbrella-shaped exhaust sleeve 310 communicate with the cross part; during operation, when the cross part expands and produces gas due to high temperature, the umbrella-shaped exhaust sleeve 310 in a compressed state inhales the gas through the gap between the support strips 340, avoiding the damage to the sealing caused by the high pressure of the cross part; when exhaust is needed, the umbrella-shaped exhaust sleeve 310 is folded to make the L-shaped sealing piece 350 of the outer tube 202 and the inner tube 330 extruded and matched, the internal gas is discharged through the exhaust valve 360 to restore its compressed state, realizing the cyclic sealing, in addition, the pressure sensor monitors the sealing of the inner tube 330 and the inner tube 201 in real time, the waterproof flange at the edge of the umbrella-shaped exhaust sleeve 310 blocks the rainwater from entering, and the whole realizes the cooperation of elastic matching, dynamic gas storage, cyclic exhaust and waterproof monitoring, ensuring the long-term high air tightness of the cross part.

[0068] In summary, the high sealing 10KV outdoor cold shrink cable terminal head realizes dynamic sealing and directional exhaust of the cross part through the sealing mechanism 300 composed of the outer tube 320, the inner tube 330, the umbrella-shaped exhaust sleeve 310 and the support strips 340, achieves the double effects of preventing air leakage and preventing water, the outer tube 320 and the inner tube 330 are made of high-elasticity materials such as silicone rubber, and are automatically shrunk after the support tube is pulled out during installation, tightly matched with the inner tube 201 and the outer tube 202 to form the initial sealing; the umbrella-shaped exhaust sleeve 310 communicates with the cross part through the gap between the support strips 340, can accommodate the gas produced by the expansion of the cross part in a high-temperature environment, avoid the damage to the sealing caused by the high pressure, and naturally block the rainwater from entering due to the umbrella shape; the gap reserved by the support strips 340 provides a channel for the flow of gas, ensuring that the expanded gas enters the exhaust sleeve smoothly, this design solves the problem that the cross part of the traditional terminal head is easy to leak due to thermal expansion, realizes the self-adaptation of the sealing performance to the environmental changes, and significantly improves the air tightness and waterproofness of outdoor use.

[0069] The high-sealing 10KV outdoor cold-shrink cable terminal head, through setting the L-shaped sealing sheet 350 and the umbrella-shaped exhaust sleeve 310 on the inner-pasted tube 330 and arranging the exhaust valve 360, realizes the repeated exhaust function of the sealing mechanism 300, and achieves the long-term stable sealing effect. When installing, the umbrella-shaped exhaust sleeve 310 is in the contraction state after pre-evacuating air, and can expand through the gap to absorb air and expand after high-temperature gas production; when the exhaust sleeve expands, the outer tube 202 bottom is manually turned up to make the L-shaped sealing sheet 350 L extrusion fit, and then the gas is discharged through the exhaust valve 360 to restore the contraction state. This design breaks through the one-time sealing limitation of the traditional sealing structure, can repeatedly use the air capacity of the exhaust sleeve through manual operation, avoids the sealing failure caused by long-term gas accumulation in the cross part, prolongs the service life of the terminal head, and reduces the operation and maintenance cost.

[0070] The high-sealing 10KV outdoor cold-shrink cable terminal head, through setting the pressure sensor on the inner wall of the inner-pasted tube 330 and pasting the inner tube 201 outer wall, realizes the real-time monitoring of the cross part sealing performance, achieves the early warning effect of failure, the pressure sensor can accurately capture the pressure change between the inner-pasted tube 330 and the inner tube 201, when the sealing performance decreases and micro-leakage occurs, the abnormal pressure data will trigger the warning device, this design makes up for the defect that the traditional terminal head sealing failure is difficult to find in time, can timely warn in the early stage of gas leakage, is convenient for the targeted processing of the operation and maintenance personnel, avoids the electrical faults such as insulation capacity reduction and flashover caused by the deterioration of the sealing performance, and improves the safety and reliability of the cable line operation.

[0071] It should be noted that, in this text, relational terms such as first and second are used only to distinguish one entity or operation from another, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitations, the element defined by the statement "including a" does not exclude the presence of additional identical elements in the process, method, article or equipment including the element.

[0072] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A high-sealability 10KV outdoor cold-shrink cable terminal head, comprising a cold-shrink outdoor terminal (200) arranged on a cable (100), wherein the cold-shrink outdoor terminal (200) comprises a cold-shrink three-branch sleeve (210) and multiple sections of cold-shrink tubes, wherein the intersection areas between the branches of the cold-shrink three-branch sleeve (210) and the cold-shrink tubes, and between the cold-shrink tubes are intersections, and the structures located inside and outside the intersection are respectively called inner tubes (201) and outer tubes (202), and the invention is characterized in that: A sealing mechanism (300) is provided on any intersection, and the sealing mechanism (300) comprises: An outer sticking tube (320) is stuck to the outer side of the outer tube (202); An inner sticking tube (330) is stuck to the outside of the cold shrink three-branch sleeve (210); An umbrella-shaped exhaust sleeve (310), with two ends respectively fixedly connected to the outer sticking tube (320) and the inner sticking tube (330); A plurality of support strips (340) are arranged on the outer side wall of the inner tube (330); A gap is provided between the two supporting strips (340), so that the umbrella-shaped exhaust sleeve (310) is connected to the intersection through the gap.

2. The high-sealability 10KV outdoor cold-shrink cable terminal according to claim 1 is characterized in that: An L-shaped sealing sheet (350) is fixedly connected to the outer bottom of the inner tube (330), and the bottom plate of the L-shaped sealing sheet (350) is arranged below the bottom of the outer tube (202) without being fitted. An exhaust valve (360) is provided on the umbrella-shaped exhaust sleeve (310) for exhausting the air inside the umbrella-shaped exhaust sleeve (310).

3. The high-sealability 10KV outdoor cold-shrink cable terminal according to claim 1, characterized in that: A pressure sensor is fixedly provided on the inner wall of the inner sticking tube (330), so that the pressure sensor is in contact with the outer wall of the inner tube (201). The sealing performance between the inner sticking tube (330) and the inner tube (201) can be detected by the pressure sensor.

4. The high-sealability 10KV outdoor cold-shrink cable terminal according to claim 1, characterized in that: The umbrella-shaped exhaust sleeve (310), the outer sticking tube (320) and the inner sticking tube (330) are made of a high molecular weight and high elastic material such as silicone rubber.

5. The high-sealability 10KV outdoor cold-shrink cable terminal according to claim 1, characterized in that: At least one inner convex ring (370) is fixedly provided on the inner wall of the inner sticking tube (330), and at least one outer convex ring (380) is fixedly provided on the outer wall of the inner tube (201), each inner convex ring (370) corresponds to one outer convex ring (380), the inner convex rings (370) and the outer convex rings (380) are equal in number and are arranged in a one-to-one correspondence, and the inner convex rings (370) and the outer convex rings (380) are arranged in a sticking relationship.

6. The high-sealability 10KV outdoor cold-shrink cable terminal according to claim 1, characterized in that: The supporting strip (340) is made of rubber material.

7. The high-sealability 10KV outdoor cold-shrink cable terminal according to claim 1, characterized in that: The edge of the umbrella-shaped exhaust sleeve (310) is provided with a waterproof flange, which extends in a direction away from the intersection, and the inner side of the waterproof flange is tightly fitted with the edge of the umbrella-shaped exhaust sleeve (310), further enhancing the ability to block rainwater and reducing the risk of rainwater entering the intersection.

Images