An epoxy resin insulated tubular busbar cold shrinkable insulating intermediate joint

Abstract

The present invention provides an epoxy resin insulated tube type busbar cold shrinkable insulated intermediate joint, which relates to the technical field of cable accessories. The epoxy resin insulated tube type busbar cold shrinkable insulated intermediate joint is used to connect a first wire and a second wire, wherein the first wire includes a first conductor and a first insulation layer coated on the first conductor, and the second wire includes a second conductor and a second insulation layer coated on the second conductor; the epoxy resin insulated tube type busbar cold shrinkable insulated intermediate joint includes a cold shrinkable insulated joint and a mesh seal, and the cold shrinkable insulated joint is sleeved at the connection between the first wire and the second wire; the mesh seal is fixed in the cold shrinkable insulated joint, and a plurality of solute holes are provided on the mesh seal. When using the epoxy resin insulated tube type busbar cold shrinkable insulated intermediate joint, there is no need to manually remove the silicone grease at the overlap of the cold shrinkable insulated joint and the insulation layer, and it can prevent the intrusion of air and water vapor at extreme temperatures.

Description

Technical Field

[0001] The invention relates to the technical field of cable accessories, in particular to an epoxy resin insulated tubular busbar cold shrinkable insulating intermediate joint. Background Art

[0002] Cold-shrink insulated intermediate joints are factory-injected, vulcanized, and expanded in diameter, then lined with supports to form components for various cable accessories. During on-site installation, the joint is placed over the treated cable joint and the internal supports are removed, pressing the joint tightly against the cable insulation. Before installing the joint, apply an excess amount of silicone grease to the cable insulation. As the joint shrinks, the fluidity of the grease causes air and trace amounts of moisture between the joint and the cable insulation to migrate toward the end of the joint, where they are eventually squeezed out, eliminating potential insulation hazards (partial discharge caused by air and electrochemical corrosion caused by moisture).

[0003] In the related art, the reference document with application number 201521077681.8 discloses a cold shrink joint and compensation conductor cable repair structure. After shrinking the cold shrink joint body, the cold shrink joint and compensation conductor cable repair structure needs to manually wipe off the excess silicone grease at the overlap between the cold shrink joint body and the cable insulation layer. Manually wiping off the excess silicone grease is not only cumbersome to operate, but also causes waste of silicone grease. Moreover, under extreme temperatures, when the cold shrink joint body and the cable insulation layer shrink inconsistently, the silicone grease between the cold shrink joint body and the cable insulation layer alone is difficult to prevent the intrusion of air and water vapor, which can easily lead to safety hazards.

[0004] The information disclosed in the background technology section of the present invention is only intended to deepen the understanding of the general background technology of the present invention, and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. Summary of the Invention

[0005] Based on this, it is necessary to provide an epoxy resin insulated tubular busbar cold shrinkable insulating intermediate joint to address the problems that the silicone grease needs to be manually cleaned after the current cold shrinkable joint shrinks, and air and water vapor are easily invaded when the cold shrinkable joint body and the cable insulation layer shrink inconsistently.

[0006] The above purpose is achieved through the following technical solutions:

[0007] An epoxy resin insulated tubular busbar cold shrinkable insulated intermediate joint is used to connect a first conductor and a second conductor, wherein the first conductor includes a first conductor and a first insulating layer covering the first conductor, and the second conductor includes a second conductor and a second insulating layer covering the second conductor, wherein the first conductor and the second conductor are connected, and the first insulating layer and the second insulating layer are both coated with silicone grease. The epoxy resin insulated tubular busbar cold shrinkable insulated intermediate joint comprises:

[0008] A cold shrink insulating joint, sleeved at the connection between the first conductor and the second conductor;

[0009] a mesh seal fixed in the cold shrinkable insulating joint and located between the cold shrinkable insulating joint and the first insulating layer, or between the cold shrinkable insulating joint and the second insulating layer, wherein the mesh seal is provided with a plurality of solute holes;

[0010] When the cold shrink insulation joint shrinks, it can squeeze the silicone grease on the first insulation layer and the second insulation layer to move toward the mesh seal. When the mesh seal moves toward the first insulation layer or the second insulation layer, the solute pores can accommodate the silicone grease.

[0011] In a possible embodiment, the cold shrink insulating joint has a connected accommodating cavity and a bonding cavity inside, the accommodating cavity corresponds to the connection between the first wire and the second wire, the bonding cavity corresponds to the first insulating layer or the second insulating layer, and the mesh seal is fixed on the inner wall of the bonding cavity.

[0012] In a possible implementation, the mesh seal is cylindrical in shape, the shape of the bonding cavity matches the shape of the mesh seal, and the axis of the mesh seal and the axis of the bonding cavity are collinearly arranged.

[0013] In a possible implementation manner, the inner diameter of the bonding cavity is smaller than the inner diameter of the receiving cavity.

[0014] In a possible embodiment, the cold shrink insulating joint further includes a stress tube and two stress cones, the two stress cones are respectively arranged at the two ends of the cavity, the stress tube is arranged in the cavity and located between the two stress cones, and the stress tube corresponds to the connection between the first conductor and the second conductor.

[0015] In a possible embodiment, the epoxy resin insulated tubular busbar cold shrinkable insulated intermediate joint further includes a conductor joint, which is disposed in the cavity and simultaneously covers the first conductor and the second conductor, and the outer side of the conductor joint corresponds to the stress tube.

[0016] In a possible implementation, the epoxy resin insulated tubular busbar cold shrinkable insulated intermediate joint further includes a heat sink, which is sleeved outside the first insulation layer or the second insulation layer and corresponds to the mesh seal.

[0017] In a possible embodiment, the heat sink includes a body and a plurality of heat dissipation fins. The body is sleeved outside the first insulating layer or the second insulating layer. The plurality of heat dissipation fins are arranged at intervals in the circumferential direction around the outer side of the body.

[0018] In a possible embodiment, the epoxy resin insulated tubular busbar cold-shrinkable insulated intermediate joint also includes a joint metal shielding mesh, a joint waterproof tape and a heat-shrinkable outer sheath, the joint metal shielding mesh is covered on the outside of the cold-shrinkable insulated joint, the joint waterproof tape is wrapped around the outside of the joint metal shielding mesh, the heat-shrinkable outer sheath is covered on the outside of the joint waterproof tape, and the main body is sleeved on one end of the heat-shrinkable outer sheath.

[0019] In a possible embodiment, the solute pore is a diamond-shaped pore.

[0020] The beneficial effects of the present invention are:

[0021] The epoxy resin insulated tubular busbar cold-shrinkable insulating intermediate joint provided by the present invention can achieve close contact with the first insulating layer and the second insulating layer when the cold-shrinkable insulating joint shrinks, thereby squeezing excess silicone grease between the first insulating layer and the cold-shrinkable insulating joint, and between the second insulating layer and the cold-shrinkable insulating joint, to move toward the mesh seal. When the cold-shrinkable insulating joint shrinks, it can also drive the mesh seal to move toward the first insulating layer or the second insulating layer. When the mesh seal is against the first insulating layer or the second insulating layer, the silicone grease can be received in the solute pores, thereby preventing excess silicone grease from overflowing outside the cold-shrinkable insulating joint, thereby avoiding manual cleaning of the silicone grease by operators. When the mesh seal is pressed against the first insulating layer or the second insulating layer, the solute pores at one end of the mesh seal close to the connection between the first conductor and the second conductor are filled with silicone grease, while the solute pores at the other end are only slightly filled with silicone grease or not filled with silicone grease. As a result, under extreme temperatures, the solute pores at the end of the mesh seal away from the connection between the first conductor and the second conductor can accommodate some of the intruding water vapor and air, and the solute pores at the end of the mesh seal close to the connection between the first conductor and the second conductor can further prevent the intrusion of air and water vapor through the silicone grease filled in its solute pores. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the three-dimensional structure of a cold-shrinkable insulating intermediate joint of an epoxy resin insulated tubular busbar according to an embodiment of the present invention is shown;

[0023] Figure 2A partially exploded schematic diagram of an epoxy resin insulated tubular busbar cold-shrinkable insulating intermediate joint according to an embodiment of the present invention is shown;

[0024] Figure 3 A cross-sectional view of an epoxy resin insulated tubular busbar cold-shrinkable insulating intermediate joint according to an embodiment of the present invention is shown;

[0025] Figure 4 Shown Figure 3 A partial schematic diagram of

[0026] Figure 5 It shows the internal schematic diagram of a cold shrinkable insulating joint according to an embodiment of the present invention;

[0027] Figure 6 A schematic diagram of the three-dimensional structure of a mesh seal according to an embodiment of the present invention is shown;

[0028] Figure 7 A schematic diagram showing the deployment of a mesh sealing member according to an embodiment of the present invention is shown;

[0029] Figure 8 FIG2 shows a schematic diagram of the three-dimensional structure of a heat sink according to an embodiment of the present invention.

[0030] in:

[0031] 100. Epoxy resin insulated tubular busbar cold-shrinkable insulated intermediate joint; 110. Cold-shrinkable insulated joint; 111. Cavity; 112. Adhesive cavity; 113. Stress tube; 114. Stress cone; 120. Mesh seal; 121. Mesh strip; 122. Node; 123. Solute hole; 130. Conductor joint; 140. Joint metal shielding mesh; 150. Joint waterproof tape; 160. Heat-shrinkable outer sheath; 170. Heat sink; 171. Main body; 172. Heat sink fins; 180. Waterproof tape;

[0032] 200, first wire; 210, first conductor; 220, first insulating layer;

[0033] 300, second wire; 310, second conductor; 320, second insulation layer;

[0034] X, first direction; Y, second direction. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0036] The serial numbers assigned to components herein, such as "first," "second," etc., are used solely to distinguish the objects being described and do not convey any sequential or technical meaning. References to "connection" and "coupling" herein, unless otherwise specified, include both direct and indirect connections (couplings). In the description of the present invention, it should be understood that terms such as "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" indicate positions or relationships based on those shown in the accompanying drawings. These terms are intended solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the device or component being referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0037] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0038] To facilitate understanding, the problems existing in the use of existing cold-shrinkable insulating intermediate joints are explained in detail. Before the cold-shrinkable insulating intermediate joint shrinks, an excess amount of silicone grease needs to be applied to the insulation layer of the conductor to ensure that the silicone grease moves outward when squeezed by the cold-shrinkable insulating intermediate joint. When the silicone grease moves outward, it can carry the moisture and air between the insulation layer of the conductor and the cold-shrinkable insulating intermediate joint outward. However, the excess silicone grease will overflow outside the cold-shrinkable insulating intermediate joint to the joint between the cold-shrinkable insulating intermediate joint and the insulation layer of the conductor. The operator needs to manually clean the overflowed silicone grease, which not only causes waste, but also the operation of cleaning the silicone grease is cumbersome, which not only increases the workload of the operator but also reduces the efficiency of the wire connection.

[0039] Under extreme temperatures, since the materials of the cold-shrinkable insulating intermediate joint and the insulation layer of the wire are usually different, the shrinkage or expansion of the cold-shrinkable insulating intermediate joint and the insulation layer of the wire are inconsistent, which in turn increases the gap between the cold-shrinkable insulating intermediate joint and the insulation layer of the wire. Although silicone grease can prevent the intrusion of water vapor and air to a certain extent, the sealing effect is weak, which makes electrical breakdown prone to occur.

[0040] See also Figure 1 and Figure 2An embodiment of the present invention provides an epoxy resin insulated tubular busbar cold shrinkable insulated intermediate joint 100. The epoxy resin insulated tubular busbar cold shrinkable insulated intermediate joint 100 is used to connect a first conductor 200 and a second conductor 300. The first conductor 200 includes a first conductor 210 and a first insulating layer 220 coated on the first conductor 210. The second conductor 300 includes a second conductor 310 and a second insulating layer 320 coated on the second conductor 310. The first conductor 210 and the second conductor 310 are connected.

[0041] The first conductor 200 and the second conductor 300 are both epoxy resin insulated tubular busbars, and the first and second insulation layers 220 and 320 are both epoxy resin insulation layers. One end of the first conductor 210 is exposed outside the first insulation layer 220, and one end of the second conductor 310 is exposed outside the second insulation layer 320, to facilitate connection between the first and second conductors 210 and 310. Silicone grease is applied to the outer surfaces of the first and second insulation layers 220 and 320.

[0042] See also Figure 2 、 Figure 4 and Figure 6 The epoxy resin insulated tubular busbar cold shrinkable insulated intermediate joint 100 includes a cold shrinkable insulated joint 110 and a mesh seal 120. The cold shrinkable insulated joint 110 is sleeved at the connection between the first conductor 200 and the second conductor 300. The mesh seal 120 is fixed inside the cold shrinkable insulated joint 110, and the mesh seal 120 is located between the cold shrinkable insulated joint 110 and the first insulating layer 220, or between the cold shrinkable insulated joint 110 and the second insulating layer 320. A plurality of solute holes 123 are provided on the mesh seal 120.

[0043] When the cold shrink insulation joint 110 shrinks, it can achieve close contact with the first insulation layer 220 and the second insulation layer 320, thereby squeezing the excess silicone grease between the first insulation layer 220 and the cold shrink insulation joint 110, and between the second insulation layer 320 and the cold shrink insulation joint 110 toward the mesh seal 120. When the cold shrink insulation joint 110 shrinks, it can also drive the mesh seal 120 to move toward the first insulation layer 220 or the second insulation layer 320. When the mesh seal 120 is against the first insulation layer 220 or the second insulation layer 320, the silicone grease can be received in the solute pores 123, thereby preventing excess silicone grease from overflowing outside the cold shrink insulation joint 110, thereby avoiding manual cleaning of the silicone grease by the operator. When the mesh seal 120 is pressed against the first insulating layer 220 or the second insulating layer 320, the solute pores 123 at one end of the mesh seal 120 close to the connection between the first conductor 210 and the second conductor 310 are filled with silicone grease, while the solute pores 123 at the other end are only slightly filled with silicone grease or not filled with silicone grease. As a result, under extreme temperatures, the solute pores 123 at one end of the mesh seal 120 away from the connection between the first conductor 210 and the second conductor 310 can accommodate some of the intruding water vapor and air, and the solute pores 123 at one end of the mesh seal 120 close to the connection between the first conductor 210 and the second conductor 310 can further prevent the intrusion of air and water vapor through the silicone grease filled in the solute pores 123.

[0044] The silicone grease is mostly filled in the solute pores 123 at one end of the mesh seal 120 near the connection between the first conductor 210 and the second conductor 310, so it has a certain positive pressure effect, thereby effectively reducing the gap between the cold shrink insulation joint 110 and the insulation layer. Combined with the hydrophobicity of the silicone grease itself, it prevents the intrusion of air and water vapor.

[0045] It is worth noting that after the cold shrink insulation joint 110 shrinks, there is still a silicone grease film between the cold shrink insulation joint 110 and the first insulation layer 220, and between the cold shrink insulation joint 110 and the second insulation layer 320. After the cold shrink insulation joint 110 shrinks, not all the silicone grease will be squeezed into the mesh seal 120.

[0046] See also Figure 2 and Figure 4 The axial direction of the cold shrink insulating joint 110 is defined as the first direction X, and the extension direction of the first conductor 210, the extension direction of the first insulating layer 220, the extension direction of the second conductor 310, and the extension direction of the second insulating layer 320 are all parallel to the first direction X.

[0047] See also Figures 1 to 4In some embodiments, the mesh seal 120 is disposed between the cold shrinkable insulating joint 110 and the first insulating layer 220. When the cold shrinkable insulating joint 110 shrinks, the internal support (not shown) is gradually withdrawn from the end of the cold shrinkable insulating joint 110 away from the first wire 200, thereby causing the cold shrinkable insulating joint 110 to gradually shrink from the end close to the second wire 300 to the end close to the first wire 200, thereby causing the silicone grease between the second insulating layer 320 and the cold shrinkable insulating joint 110, and the silicone grease between the first insulating layer 220 and the cold shrinkable insulating joint 110 to move along the first direction X toward the position corresponding to the mesh seal 120. It is understandable, but not limited to this, that in other embodiments, the mesh structure can also be provided between the cold shrink insulation joint 110 and the second insulation layer 320. When the cold shrink insulation joint 110 shrinks, the internal support is gradually withdrawn from the end of the cold shrink insulation joint 110 away from the second wire 300, thereby causing the cold shrink insulation joint 110 to gradually shrink from the end close to the first wire 200 to the end close to the second wire 300, thereby causing the silicone grease between the first insulation layer 220 and the cold shrink insulation joint 110, and the silicone grease between the second insulation layer 320 and the cold shrink insulation joint 110 to move along the first direction X toward the position corresponding to the mesh seal 120.

[0048] See also Figure 2 、 Figure 4 and Figure 5 In some embodiments, the cold shrink insulation joint 110 has a connected cavity 111 and bonding cavity 112. The cavity 111 corresponds to the connection between the first wire 200 and the second wire 300, and the bonding cavity 112 corresponds to the first insulation layer 220 or the second insulation layer 320. The mesh seal 120 is fixed to the inner wall of the bonding cavity 112. The inner wall of the cavity 111 can completely enclose the exposed first conductor 210 of the first wire 200 and the exposed second conductor 310 of the second wire 300, and also encloses a portion of the first insulation layer 220 and the second insulation layer 320. The mesh seal 120 is bonded to the inner wall of the bonding cavity 112 so that when the cold shrink insulation joint 110 contracts, it can move the mesh seal 120 toward the first insulation layer 220 or the second insulation layer 320.

[0049] For example, the mesh sealing member 120 may be bonded to the inner wall of the bonding cavity 112 by glue.

[0050] When the cold shrinkable insulating joint 110 shrinks, the portion of the cold shrinkable insulating joint 110 at the receiving cavity 111 shrinks first, and the portion of the cold shrinkable insulating joint 110 at the bonding cavity 112 shrinks later.

[0051] In some embodiments, the shape of the mesh seal 120 is cylindrical, the shape of the bonding cavity 112 matches the shape of the mesh seal 120, and the axial center line of the mesh seal 120 and the axial center line of the bonding cavity 112 are arranged collinearly, so that when the cold shrink insulation joint 110 is partially shrunk at the bonding cavity 112, the inner side of the mesh seal 120 can be evenly supported on the first insulation layer 220 or the second insulation layer 320, thereby allowing the silicone grease to be evenly filled in the solute pores 123 in the circumferential direction of the mesh seal 120.

[0052] In some embodiments, the inner diameter of the bonding cavity 112 is smaller than the inner diameter of the containing cavity 111, so that the mesh seal 120 can be more quickly supported on the first insulating layer 220 or the second insulating layer 320, and the excess silicone grease is accommodated in the solute pores 123, thereby effectively preventing the silicone grease from overflowing.

[0053] See also Figure 6 and Figure 7 The mesh seal 120 is cylindrical in shape, and the axial direction of the mesh seal 120 is parallel to the first direction X. The width direction of the mesh seal 120 after being cut and unfolded along the first direction X is defined as the second direction Y, and the second direction Y is parallel to a radial direction of the mesh seal 120 when it is cylindrical. The length direction of the mesh seal 120 after being cut and unfolded along the first direction X is parallel to the first direction X.

[0054] The mesh seal 120 is formed by a plurality of mesh strips 121 that are cross-connected with each other. The connection points between the mesh strips 121 are nodes 122 . The walls of the solute pores 123 are formed by enclosing the plurality of mesh strips 121 .

[0055] In some embodiments, the solute holes 123 are diamond-shaped holes, the walls of which are enclosed by four mesh strips 121. Each solute hole 123 corresponds to four nodes 122 (except for the solute holes 123 at both ends of the mesh seal 120 along the first direction X). When the conductors undergo thermal expansion and contraction under extreme conditions, the diamond-shaped structure of the solute holes 123 can achieve structural deformation without excessive strain on the mesh strips 121, thereby ensuring the strength of the mesh seal 120. Furthermore, when air and water vapor intrude along the first direction X, they are drawn to the nodes 122, where the sealing performance is higher, thereby improving the sealing capability of the epoxy resin insulated tubular busbar cold-shrinkable insulated intermediate joint 100.

[0056] For example, when the wire expands or contracts under extreme conditions, the mesh seal 120 expands or contracts along the second direction Y, causing the diamond structure of the solute pores 123 to deform. It is worth noting that the mesh seal 120 expands or contracts in multiple directions, and the second direction Y is only one of them.

[0057] When the mesh seal 120 is against the first insulating layer 220 or the second insulating layer 320, the solute pores 123 at one end of the mesh seal 120 close to the connection between the first conductor 210 and the second conductor 310 along the first direction X are filled with silicone grease, so that the corresponding solute pores 123 are deformed and increased, and correspondingly, the solute pores 123 at the other end are deformed and reduced. The reduced deformation of the solute pores 123 increases the pressure in the solute pores 123, making it difficult for water vapor and air to enter, thereby improving the sealing ability of the mesh seal 120 at one end away from the connection between the first conductor 210 and the second conductor 310 along the first direction X.

[0058] See also Figure 2 In some embodiments, the epoxy resin insulated tubular busbar cold shrinkable insulating intermediate joint 100 further includes a conductor joint 130, which is disposed in the cavity 111 and simultaneously covered on the first conductor 210 and the second conductor 310. The conductor joint 130 is used to connect the first conductor 210 and the second conductor 310, and the silicone grease between the cold shrinkable insulating joint 110 and the first insulating layer 220 can flow through the conductor joint 130 to between the cold shrinkable insulating joint 110 and the second insulating layer 320, or the silicone grease between the cold shrinkable insulating joint 110 and the second insulating layer 320 can flow through the conductor joint 130 to between the cold shrinkable insulating joint 110 and the first insulating layer 220.

[0059] Exemplarily, the conductor connector 130 is covered on the first conductor 210 and the second conductor 310 by crimping.

[0060] In some embodiments, see Figure 2 and Figure 5 The cold-shrink insulation joint 110 also includes a stress tube 113 and two stress cones 114. The two stress cones 114 are respectively disposed at both ends of the cavity 111. The stress tube 113 is disposed within the cavity 111 and located between the two stress cones 114. The stress tube 113 corresponds to the conductor joint 130. The stress tube 113 is used to disperse and relieve stress generated at the connection between the first conductor 210 and the second conductor 310, as well as stress generated at the conductor joint 130. The stress cones 114 are conical in shape and can disperse stress to other areas of the cold-shrink insulation joint 110, thereby preventing damage to the connection between the first conductor 210 and the second conductor 310 due to excessive stress.

[0061] Exemplarily, the stress tube 113 and the cold shrink insulation joint 110 are integrally formed, and the stress cone 114 and the cold shrink insulation joint 110 are integrally formed.

[0062] See also Figure 2 and Figure 4In some embodiments, the epoxy resin insulated tubular busbar cold-shrinkable insulated intermediate joint 100 further includes a joint metal shielding mesh 140, a joint waterproof tape 150, and a heat-shrinkable outer sheath 160. The joint metal shielding mesh 140 is wrapped around the cold-shrinkable insulated joint 110, the joint waterproof tape 150 is wrapped around the outside of the joint metal shielding mesh 140, and the heat-shrinkable outer sheath 160 is wrapped around the outside of the joint waterproof tape 150. The joint metal shielding mesh 140 can reduce electromagnetic interference and ensure the stability and safety of the transmission of the first conductor 210 and the second conductor 310. The joint metal shielding mesh 140 can also increase mechanical strength and improve resistance to external physical impact. The joint waterproof tape 150 can secure the joint metal shielding mesh 140 to the first conductor 200 and the second conductor 300 and prevent moisture and air from entering. The heat shrink outer sheath 160 can be fixed to the outside of the joint waterproof tape 150 by heat shrinking to protect the joint metal shielding mesh 140 , the joint waterproof tape 150 and the cold shrink insulation joint 110 .

[0063] Furthermore, the overall length of the joint waterproof tape 150 is longer than the length of the joint metal shielding mesh 140 , and the length of the heat shrinkable outer sheath 160 is longer than the overall length of the joint waterproof tape 150 .

[0064] See also Figure 2 and Figure 4 In some embodiments, the epoxy resin insulated tubular busbar cold-shrinkable insulated intermediate joint 100 further includes two waterproof rubber strips 180, which are respectively wrapped around the first insulating layer 220 and the second insulating layer 320. One waterproof rubber strip 180 is located between the first insulating layer 220 and the heat-shrinkable outer sheath 160, and the other waterproof rubber strip 180 is located between the second insulating layer 320 and the heat-shrinkable outer sheath 160. The waterproof rubber strips 180 are used to prevent air and water vapor from invading the heat-shrinkable outer sheath 160 along the first direction X.

[0065] In some embodiments, the waterproof rubber strip 180 is a first sealing structure; the mesh strips 121 and nodes 122 of the solute pores 123 at one end of the mesh seal 120 away from the connection between the first conductor 210 and the second conductor 310 along the first direction X are a second sealing structure; the mesh strips 121, nodes 122, and silicone grease in the solute pores 123 at one end of the mesh seal 120 close to the connection between the first conductor 210 and the second conductor 310 along the first direction X are a third sealing structure.

[0066] In order to ensure the rigidity and insulation of the connection between the first conductor 210 and the second conductor 310, a thicker insulating connection structure is usually provided, so that when the first conductor 210 and the second conductor 310 generate heat, the heat transfer efficiency is low and heat is easily concentrated in the middle part.

[0067] See also Figure 4 and Figure 8 In some embodiments, the epoxy resin insulated tubular busbar cold-shrinkable insulated intermediate joint 100 further includes a heat sink 170, which is sleeved on one end of the heat-shrinkable outer sheath 160 and corresponds to the mesh seal 120. Heat from the first conductor 210 is conducted through the silicone grease film between the first insulating layer 220 and the cold-shrinkable insulated joint 110 to the silicone grease within the solute pores 123 of the mesh seal 120, and then dissipated through the heat sink 170. This improves the axial thermal conductivity of the first conductor 210 and prevents heat accumulation. Alternatively, heat from the second conductor 310 is conducted through the silicone grease film between the second insulating layer 320 and the cold-shrinkable insulated joint 110 to the silicone grease within the solute pores 123 of the mesh seal 120, and then dissipated through the heat sink 170. This improves the axial thermal conductivity of the second conductor 310 and prevents heat accumulation.

[0068] In some embodiments, the heat of the silicone grease in the solute pores 123 of the mesh seal 120 needs to be transferred to the heat sink 170 through the joint metal shielding mesh 140 , the joint waterproof tape 150 , and the heat shrink outer sheath 160 in sequence.

[0069] In some embodiments, the heat sink 170 includes a main body 171 and a plurality of heat sink fins 172. The main body 171 is sleeved on one end of the heat shrink outer sheath 160. The plurality of heat sink fins 172 are arranged circumferentially at intervals around the outside of the main body 171. The plurality of circumferentially arranged heat sink fins 172 can effectively improve the heat dissipation capacity of the heat sink 170.

[0070] In some embodiments, the main component of the cold shrink insulating joint 110 is silicone rubber, and the silicone grease contains thermal conductive fillers (such as aluminum oxide and boron nitride).

[0071] The technical features of the above embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0072] The above-described embodiments merely illustrate several embodiments of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. An epoxy resin insulated tubular busbar cold shrinkable insulated intermediate joint, characterized in that: Used to connect a first wire and a second wire, the first wire includes a first conductor and a first insulating layer coated on the first conductor, the second wire includes a second conductor and a second insulating layer coated on the second conductor, the first conductor and the second conductor are connected, the first insulating layer and the second insulating layer are coated with silicone grease, the epoxy resin insulated tubular busbar cold shrinkable insulating intermediate joint includes: A cold shrink insulating joint, sleeved at the connection between the first conductor and the second conductor; a mesh seal fixed in the cold shrinkable insulating joint and located between the cold shrinkable insulating joint and the first insulating layer, or between the cold shrinkable insulating joint and the second insulating layer, wherein the mesh seal is provided with a plurality of solute holes; When the cold shrink insulation joint shrinks, it can squeeze the silicone grease on the first insulation layer and the second insulation layer to move toward the mesh seal. When the mesh seal moves toward the first insulation layer or the second insulation layer, the solute pores can accommodate the silicone grease.

2. The epoxy resin insulated tubular busbar cold shrinkable insulated intermediate joint according to claim 1, characterized in that: The cold shrink insulating joint has a connected accommodating cavity and a bonding cavity inside, the accommodating cavity corresponds to the connection between the first wire and the second wire, the bonding cavity corresponds to the first insulating layer or the second insulating layer, and the mesh seal is fixed on the inner wall of the bonding cavity.

3. The epoxy resin insulated tubular busbar cold shrinkable insulated intermediate joint according to claim 2, characterized in that: The mesh seal is cylindrical in shape, the bonding cavity is matched with the mesh seal in shape, and the axis of the mesh seal and the axis of the bonding cavity are collinearly arranged.

4. The epoxy resin insulated tubular busbar cold shrinkable insulated intermediate joint according to claim 2, characterized in that: The inner diameter of the bonding cavity is smaller than the inner diameter of the receiving cavity.

5. The epoxy resin insulated tubular busbar cold shrinkable insulated intermediate joint according to claim 2, characterized in that: The cold shrink insulation joint also includes a stress tube and two stress cones. The two stress cones are respectively arranged at the two ends of the cavity. The stress tube is arranged in the cavity and located between the two stress cones. The stress tube corresponds to the connection between the first conductor and the second conductor.

6. The epoxy resin insulated tubular busbar cold shrinkable insulated intermediate joint according to claim 5, characterized in that: The epoxy resin insulated tubular busbar cold shrinkable insulated intermediate joint further includes a conductor joint, which is disposed in the cavity and simultaneously covers the first conductor and the second conductor, with the outer side of the conductor joint corresponding to the stress tube.

7. The epoxy resin insulated tubular busbar cold shrinkable insulating intermediate joint according to any one of claims 1 to 5, characterized in that: The epoxy resin insulated tubular busbar cold shrinkable insulated intermediate joint further includes a heat sink, which is sleeved outside the first insulating layer or the second insulating layer and corresponds to the mesh sealing member.

8. The epoxy resin insulated tubular busbar cold shrinkable insulated intermediate joint according to claim 7, characterized in that: The heat sink includes a body and a plurality of heat dissipation fins. The body is sleeved outside the first insulating layer or the second insulating layer. The plurality of heat dissipation fins are arranged at intervals in the circumferential direction around the outer side of the body.

9. The epoxy resin insulated tubular busbar cold shrinkable insulated intermediate joint according to claim 8, characterized in that: The epoxy resin insulated tubular busbar cold-shrinkable insulated intermediate joint also includes a joint metal shielding mesh, a joint waterproof tape and a heat-shrinkable outer sheath. The joint metal shielding mesh is covered on the outside of the cold-shrinkable insulated joint, the joint waterproof tape is wrapped around the outside of the joint metal shielding mesh, the heat-shrinkable outer sheath is covered on the outside of the joint waterproof tape, and the main body is sleeved on one end of the heat-shrinkable outer sheath.

10. The epoxy resin insulated tubular busbar cold shrinkable insulating intermediate joint according to any one of claims 1 to 5, characterized in that: The solute pores are diamond-shaped pores.

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