CN214479526U - Intermediate joint structure and cable junction box - Google Patents

Abstract

The utility model discloses an intermediate joint structure and a cable connecting box, the intermediate joint structure comprises two separable connectors and a sleeve which are oppositely arranged, each separable connector comprises an insulating shell and a connecting terminal, the insulating shell is provided with a connecting plug hole and a terminal hole, one end of the connecting terminal is positioned in the terminal hole and is connected with a cable, and the other end of the connecting terminal extends into the connecting plug hole; and the two end parts of the sleeve are electrically connected with the other end of the wiring terminal in the plug hole. The utility model discloses technical scheme's middle joint design can realize the segmentation protection of cable, improves waterproof performance.

Description

Intermediate joint structure and cable junction box

Technical Field

The utility model relates to a connector technical field, in particular to adapter structure and cable junction box.

Background

In the current 10kV distribution network system, a cold-contraction or prefabricated intermediate joint is adopted as a common cable intermediate connection mode, but due to the reasons of direct buried arrangement of cables or water soaking of a cable well and the like, the operation environment of the intermediate joint is relatively severe and complex, and more breakdown accidents are caused by the reasons of water inflow of cable cores or external physical damage and the like. The cold-shrinkage or prefabricated intermediate joint has no special waterproof structure at the connection position of the wire core, and water vapor can spread to the next section of cable along the wire core, so that the operation of the whole cable is threatened finally.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims at providing an intermediate joint structure aims at realizing the segmentation protection of cable.

In order to achieve the above object, the utility model provides an intermediate joint structure includes:

the two separable connectors are oppositely arranged, each separable connector comprises an insulating shell and a wiring terminal, the insulating shell is provided with a plug hole and a terminal hole which are communicated, one end of the wiring terminal is positioned in the terminal hole and is connected with a cable, and the other end of the wiring terminal extends into the plug hole; and

and the two end parts of the sleeve are electrically connected with the other end of the wiring terminal in the plug hole.

In an optional embodiment, the bushing includes a housing and an electrode, the housing is formed with an installation groove, the electrode is disposed in the installation groove, two free ends of the electrode are exposed in a notch of the installation groove, and the free ends of the electrode are electrically connected with the end of the connection terminal in the insertion hole.

In an optional embodiment, the insulating housing is in a T-shaped cylindrical shape, the insulating housing has a mounting hole, the mounting hole is horizontally communicated with the insertion hole, the terminal hole is perpendicular to and communicated with the insertion hole and the mounting hole, and the electrode is in a U-shaped configuration.

In an optional embodiment, the connection terminal comprises a connection sheet and a crimping pipe connected with the connection sheet, a wire core of the cable is crimped in the crimping pipe, a screw hole is formed in the free end face of the electrode, and the connection sheet is in threaded connection with the free end face of the electrode.

In an optional embodiment, the housing is U-shaped, the housing includes a middle portion and two abutting portions connected to two ends of the middle portion, the mounting groove penetrates through the middle portion and the two abutting portions, the free end surface of the electrode is exposed out of the notch of the mounting groove, and one of the abutting portions is inserted into one of the insertion holes.

In an optional embodiment, the separable connector further comprises a waterproof assembly, the waterproof assembly comprises a flexible sealing layer and a prestress coating layer, the flexible sealing layer coats the connection position of the crimping pipe and the wire core, and the prestress coating layer wraps the outer surface of the flexible sealing layer.

In an optional embodiment, the flexible sealing layer is any one of a cold-shrink silicone rubber tube, an elastic latex tube, a single-component curing type polyurethane sealing paste, a two-component curing type polyurethane sealing paste and liquid organic silicone rubber; and/or the presence of a gas in the gas,

the prestress coating layer is any one of an organic silicon rubber cold-shrinkable tube, a polyurethane cold-shrinkable tube, a chemical crosslinking polyolefin heat-shrinkable tube and a radiation crosslinking polyolefin heat-shrinkable tube.

In an optional embodiment, the insulating shell is made of a PVC flame retardant pipe; and/or the presence of a gas in the gas,

the shell is made of epoxy resin.

The utility model discloses provide a cable junction box again, include cable junction box includes the box and locates in the box as above arbitrary the middle joint design.

In an optional embodiment, the box body is made of stainless steel.

The utility model provides an among the technical scheme, the separable connector and a sleeve pipe of middle joint design including two relative settings, each separable connector is connected including insulating casing and the binding post of locating it, a cable is fixed in a separable connector through the crimping in a binding post's one end, two separable connectors carry out the electricity through a sleeve pipe and connect, thereby can effectively separate the sinle silk of the cable in two separable connectors, even partial sinle silk accident gets into steam, also can block the route that steam propagated along the cable, thereby realize thoroughly the segmentation protect function to the cable.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an embodiment of the cable connection box of the present invention;

FIG. 2 is a schematic structural view of an intermediate joint structure in the cable coupling box of FIG. 1;

FIG. 3 is an elevational view of the intermediate joint structure of FIG. 2;

FIG. 4 is a right side elevational view of a portion of the intermediate joint structure illustrated in FIG. 2;

FIG. 5 is a cross-sectional view taken along line A-A of FIG. 4;

FIG. 6 is a cross-sectional view of the dielectric housing of the intermediate joint structure of FIG. 2;

FIG. 7 is an elevation view of a sleeve of the intermediate coupling structure of FIG. 2;

fig. 8 is a cross-sectional view taken along line B-B of fig. 7.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				100	Cable junction box	50	Cable with a protective layer
10	Box body	51	Phase core
				10a	Accommodating tank		511	Wire core
11	Cover for portable electronic device	70	Sleeve pipe
				13	Box body	71	Outer casing
30	Separable connector	711	Intermediate section
				31	Insulating shell	713	Butt joint part
311	Plug hole	73	Electrode for electrochemical cell
				313	Terminal hole	731	Free end
315	Mounting hole	7311	Screw hole
				33	Connecting terminal	90	Waterproof assembly
331	Connecting sheet	91	Flexible sealing layer
				333	Crimping pipe	93	Prestressed cladding layer
35	Plug

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides an intermediate joint structure is applied to continuing of cable 50.

Referring to fig. 2 to 6, in an embodiment of the present invention, the middle joint structure includes two separable connectors 30 and a sleeve 70, which are oppositely disposed, each separable connector 30 includes an insulating housing 31 and a connection terminal 33, the insulating housing 31 has a connection hole 311 and a terminal hole 313, which are communicated, one end of the connection terminal 33 is located in the terminal hole 313 and is connected to a cable 50, and the other end of the connection terminal extends into the connection hole 311; the two end portions of the sleeve 70 are electrically connected to the other end of the terminal 33 in the insertion hole 311.

In this embodiment, the intermediate connector may implement connection between two cables 50, and may also implement connection between one cable 50 and an equipment outlet interface, which is not limited herein. The intermediate joint structure includes two separable connectors 30, where the separable connector 30 includes an insulating housing 31 and a terminal 33 disposed in the insulating housing 31, the insulating housing 31 has a plug hole 311 and a terminal hole 313 which are communicated with each other, the shape of the insulating housing 31 may be a straight line or a T-shape, which is not limited herein, and the axes of the plug hole 311 and the terminal hole 313 thus obtained may be a straight line or a vertical arrangement.

It can be understood that the terminal 33 is used to facilitate connection of the ends of two cables 50, and generally, the terminal 33 includes a connecting piece 331 and a crimping tube 333, and the ends of the cables 50 are connected with the crimping tube 333 by crimping, so that the processing is convenient and the connection structure is stable. Of course, the end of the cable 50 needs to be stripped, the outer insulation layer is pulled away to expose the core 511, and the core 511 is crimped with the crimp tube 333, so as to ensure electrical conduction while achieving structural connection. Similarly, the two end portions of the sleeve 70 are electrically connected to the terminals 33 in the insertion holes 311, where the sleeve 70 may be in a linear shape, or a V-shape, a U-shape, or the like with an included angle, and the connection is not limited herein, and may be selected according to convenience, and the connection may be a crimping connection, a threaded connection, or other detachable connection, and the connection is not limited herein.

The utility model discloses among the technical scheme, the middle joint design includes two separable connectors 30 and a sleeve pipe 70 that set up relatively, each separable connector 30 is connected including insulating housing 31 and locates binding post 33 in it, a cable 50 is fixed in a separable connector 30 in a binding post 33's one end through the crimping, two separable connectors 30 carry out the electricity through a sleeve pipe 70 and connect, thereby can effectively separate sinle silk 511 of cable 50 in two separable connectors 30, even some sinle silks 511 accident gets into steam, also can block the route that steam propagated along cable 50, thereby realize thoroughly the segmentation protect function to cable 50.

Referring to fig. 5 and 6, in an alternative embodiment, the sleeve 70 includes a housing 71 and an electrode 73, the housing 71 is formed with a mounting groove, the electrode 73 is disposed in the mounting groove, two free ends 731 of the electrode 73 are exposed out of the notch of the mounting groove, and the free ends 731 of the electrode 73 are electrically connected to the end of the terminal 33 in the inserting hole 311.

In this embodiment, the sleeve 70 includes a housing 71 and an electrode 73, the electrode 73 has conductivity, the material of the electrode 73 is copper, and the electrode 73 can electrically connect with the terminals 33 of the two separable connectors 30, and the housing 71 is formed with a mounting groove for accommodating the electrode 73, so as to protect the electrode 73 and prevent the electrode 73 from contacting with external moisture or dust. Specifically, the material of shell 71 can be epoxy, has better material stability, and the mounting groove that its formed can be for lining up the hole on the relative two surfaces of shell 71, and electrode 73 is the bar and wears to locate in this mounting groove to realize the effective protection to electrode 73 on the circumferential direction. The free ends 731 of the electrodes 73 are exposed to the notches of the mounting grooves, thereby facilitating electrical connection with the connection terminals 33.

In an alternative embodiment, the insulating housing 31 is in a T-shaped cylindrical shape, the insulating housing 31 has a mounting hole 315, the mounting hole 315 is horizontally communicated with the insertion hole 311, the terminal hole 313 is perpendicular to and communicated with the insertion hole 311 and the mounting hole 315, and the electrode 73 is in a U-shaped configuration.

In the present embodiment, in order to improve the applicability of the intermediate joint structure, the separable connector 30 is made into a T-shaped separable connector 30, namely, the insulating housing 31 has a T-shaped cylindrical shape, which has a mounting hole 315 and a plugging hole 311 communicating horizontally, and a terminal hole 313 vertically connected with the mounting hole 315 and the plug hole 311, wherein a wire core 511 of a cable 50 penetrates into the terminal hole 313 to be connected with the terminal 33 in a crimping manner, the plug hole 311 is used for connecting another cable 50 or the end part needing butt joint, and the electrode 73 is arranged in a U shape, that is, the axes of the two free ends 731 of the electrode 73 are parallel and spaced, and each free end 731 is inserted into one of the insertion holes 311 and then electrically connected to the connection terminal 33, so that the two cables 50 are bent several times in the original axial direction, that is, the path for the water vapor to travel is increased, and the protection of the physical partition is further increased, so that the cable 50 is protected in sections.

Of course, in other embodiments, the electrodes 73 may also be disposed in a zigzag shape to ensure the water vapor isolation between the cores 511 of the two cables 50.

Referring to fig. 6 to 8, in an alternative embodiment, a screw hole 7311 is formed on an end surface of the free end 731 of the electrode 73, and the connecting piece 331 is connected to the end surface of the free end 731 of the electrode 73 by a screw thread.

In this embodiment, since the connecting plate 331 is generally provided with a connecting hole, in order to facilitate the connection, the end surface of the free end 731 of the electrode 73 is provided with a screw hole 7311, and the locking member is inserted into the connecting hole and the screw hole 7311 through the mounting hole 315, thereby achieving stable locking. The connection structure of this connection mode is stable, and can be conveniently disassembled and maintained without damaging the connection terminal 33 and the sleeve 70.

Certainly, in order to perform sealing protection on the connection position, after the connection is completed, the plug 35 is installed in the installation hole 315, the plug 35 is in interference fit with the installation hole 315, and an avoiding hole is formed in the end surface facing the locking member to avoid the installation end of the locking member, so that the locking member can be effectively covered, and water vapor or dust is reduced from entering the connection position of the cable 50 from the end.

In an alternative embodiment, the housing 71 is U-shaped, the housing 71 includes a middle portion 711 and two abutting portions 713 connected to two ends of the middle portion 711, the mounting slot penetrates through the middle portion 711 and the two abutting portions 713, an end surface of the free end 731 of the electrode 73 is exposed out of a slot of the mounting slot, and one of the abutting portions 713 is inserted into one of the insertion holes 311.

In this embodiment, in order to further improve the protection of the electrode 73, the shape of the housing 71 is also U-shaped, and includes a middle portion 711 and two connection portions 713, the mounting groove penetrates through the middle portion 711 and the two connection portions 713, a notch of the mounting groove is formed in the end surface of the connection portion 713, the electrode 73 is inserted into the mounting groove of the U-shaped, and only the end surface of the free end 731 of the electrode 73 is exposed out of the notch of the mounting groove, so that the exposed area of the electrode 73 can be further reduced, thereby reducing the probability of the occurrence of a moisture short circuit or a breakdown accident due to the adhesion of the electrode 73, and improving the safety in use. Here, the electrode 73 and the housing 71 may be integrally injection molded, thereby facilitating processing, improving processing efficiency, and improving structural stability. The two butting parts 713 of the shell 71 are in interference fit with the plug holes 311, so that the connection stability of the sleeve 70 and the two separable connectors 30 is realized, the probability of water vapor entering from the gap between the shell 71 and the insulating shell 31 can be reduced, and the waterproof property of the middle joint structure is ensured.

It can be understood that, in order to facilitate the insertion between the bushing 70 and the insulating housing 31, the shape of the butting portion 713 is tapered, and the shape of the insertion hole 311 is flared, so that the end with a smaller size is more easily inserted into the insertion hole 311, thereby improving the connection efficiency.

In addition, in order to increase the expandability of the middle joint, the cable 50 is provided as a multi-core cable 50, for example, a three-core cable 50, that is, one cable 50 includes three phase cores 51, the outermost layer of the cable 50 is pulled apart, the three phase cores 51 are spaced apart, the three phase cores 51 of two cables 50 are respectively in one-to-one correspondence, and electrical connection is realized through two separable connectors 30 and a sleeve 70, so that connection of the multi-branch cable 50 can be realized, connection between cables 50 with different wire diameters can be realized at the same time, butt joint of cables 50 made of different phase cores 51 can be realized, the problem of heating of a connecting pipe of the middle joint of the aluminum-core cable 50 can be solved, and a joint of any two phase cores 51 can be used as a design reserved interface for rush-repair of an access port of the bypass cable 50.

Referring to fig. 5 and 6 again, in an alternative embodiment, the separable connector 30 further includes a waterproof assembly 90, the waterproof assembly 90 includes a flexible sealing layer 91 and a pre-stressed coating 93, the flexible sealing layer 91 covers the connection position of the crimping tube 333 and the wire core 511, and the pre-stressed coating 93 covers the outer surface of the flexible sealing layer 91.

In this embodiment, in order to further improve the waterproof performance of the intermediate joint structure, the waterproof assembly 90 is disposed in the separable connector 30, the waterproof assembly 90 includes a flexible sealing layer 91 and a pre-stressed coating layer 93, the flexible sealing layer 91 is coated at a position where the crimping pipe 333 is connected to the wire core 511, and the pre-stressed coating layer 93 is coated on the outer surface of the flexible sealing layer 91, so that the waterproof performance of the connection position of the wire core 511 can be ensured, water vapor is prevented from entering the connection interface of the wire core 511, and the occurrence of breakdown accidents is significantly reduced.

Specifically, the flexible sealing layer 91 covers the wire core 511, the butt joint position of the wire core 511 and the crimping pipe 333, and a part of the crimping pipe 333, so that water vapor is reduced from entering a gap between the crimping pipe 333 and the wire core 511; the coating area of the pre-stress coating layer 93 may be larger than that of the flexible sealing layer 91, for example, one end of the pre-stress coating layer 93 extends to coat the insulating layer, and the other end extends to the connecting sheet 331, so as to reduce the intrusion of water vapor into the gap between the insulating layer and the wire core 511, and further improve the waterproof performance.

In an optional embodiment, the flexible sealing layer 91 is any one of a cold-shrink silicone rubber tube, an elastic latex tube, a single-component curing type polyurethane sealing paste, a two-component curing type polyurethane sealing paste, and liquid silicone rubber; and/or the presence of a gas in the gas,

the pre-stress coating layer 93 is any one of an organic silicon rubber cold shrink tube, a polyurethane cold shrink tube, a chemically cross-linked polyolefin heat shrink tube and a radiation cross-linked polyolefin heat shrink tube.

In this embodiment, the flexible sealing layer 91 may be an organic silicon rubber cold shrink tube with a secant modulus smaller than 173MPa, and the pre-stress coating layer 93 rotates a semi-rigid radiation cross-linked polyolefin heat shrink tube with a secant modulus within a range of 173-240 MPa, so as to add a permanent pre-tightening force to the flexible sealing layer 91.

In an alternative embodiment, the insulating housing 31 is made of a PVC flame retardant pipe. Here, in order to further improve the fire-retardant performance of the intermediate joint structure, the insulating housing 31 is made of a PVC flame-retardant pipe material, so that the flame-retardant performance of the separable connector 30 can be improved, and the intermediate joint can be prevented from being broken down and ignited in an external environment. Of course, the insulating housing 31 may also be made of other materials with flame retardant elements added. Meanwhile, the insulation layer structure of the cable 50 is also made of V0-grade flame retardant material, so that the flame retardant performance of the whole structure is enhanced.

Referring to fig. 1 and fig. 2, the present invention further provides a cable connection box 100, including the cable connection box 100 including a box body 10 and an intermediate joint structure disposed in the box body 10. The specific structure of the intermediate joint structure refers to the foregoing embodiments, and since the cable connection box 100 adopts all the technical solutions of all the foregoing embodiments, at least all the beneficial effects brought by the technical solutions of the foregoing embodiments are achieved, and no further description is given here.

In this embodiment, the cable junction box 100 includes the box 10, and the shape of this box 10 is the cuboid, and the hookup location majority because of two cables 50 is rectangular form, so, sets up box 10 and can hold middle joint design for the cuboid better, also can be convenient for settle simultaneously. Of course, in other embodiments, the shape of the box 10 may be a cylinder or other shapes. In order to facilitate the connection and the maintenance of the middle joint structure, the box body 10 is arranged to be of a split structure, namely, the box body 10 comprises a cover 11 and a box body 13, the box body 13 and the cover 11 are enclosed to form a containing cavity, the cover 11 and the box body 13 are detachably connected, the maintenance and the disassembly are facilitated, and the specific connection mode can be threaded connection, buckle connection and the like. And in order to improve the sealing performance, a sealing ring can be arranged at the joint of the box body 13 and the cover 11 so as to further improve the protection performance. The two side surfaces of the box body 13 need to be provided with wire passing holes so that the two cables 50 can pass through the accommodating cavity, and the specific positions of the wire passing holes can be set according to the structure of the separable connector 30, which is not limited herein, and are generally arranged on the two opposite side surfaces of the box body 13. Of course, the sealing ring is disposed in the interference fit or clearance fit between the wire passing hole and the cable 50 to ensure the sealing property and waterproof property of the box 10.

The box 10 can provide protection for the internal middle joint structure, so that the middle joint structure is completely isolated from the external environment, the problems of water inflow or external physical damage and the like at the middle joint structure are solved, the service performance of the middle joint structure is improved, the normal connection between the cables 50 is realized, and the electrical and mechanical properties of the cables are met. Meanwhile, the waterproof performance and the physical partition protection of the middle joint structure are matched, the external waterproof performance of the cable connection box 100 can be obviously improved, the invasion of environmental water vapor is isolated, the influences of direct-buried laying, water soaking operation and the like are eliminated, the internal structure is effectively protected from being damaged by external force, and the operation reliability of the cable 50 connection structure is enhanced.

In an alternative embodiment, the box 10 is made of stainless steel.

In this embodiment, select box 10 to be stainless steel, structural strength is high, and has better corrosion-resistant and waterproof performance, can play powerful mechanical protection and isolated external environment's effect. Specifically, the box body 10 can be made of stainless steel with IP68 waterproof and dustproof grade, so that the box body can protect the internal components in strength and has better functions of explosion prevention, water prevention, fire prevention and the like, and the protection grade is improved. The arrangement of the structure is matched with the arrangement of the flame-retardant material of the middle joint structure, so that the explosion-proof and flame-retardant performance can be comprehensively improved, and the safety is improved.

In addition, an automatic fire extinguishing device can be added in the box body 10, so that secondary damage after an accident and fire is avoided, and damage is reduced to the maximum extent. Meanwhile, an online monitoring assembly, such as a temperature measuring assembly, a local measuring discharge assembly, a water level measuring assembly and the like, can be additionally arranged in the box body 10, so that the operation condition of the middle joint structure can be observed and controlled, the accurate early warning and the positioning search in the early stage of the fault can be provided for operation and maintenance, important operation data support can be provided, and the occurrence of accidents can be reduced. The box body 10 also provides an installation foundation and a protection function for the online monitoring assembly, so that the connection of the cable 50 is not influenced by the arrangement of the online monitoring assembly, and the maintenance efficiency is improved; and the working performance of the on-line monitoring assembly is not influenced by the external environment, and the service life of the on-line monitoring assembly is prolonged.

Certainly, in order to guarantee each monitoring part steady operation in the cable junction box 100, can also set up the CT in box 10 and get the electric installation, the CT gets the electric installation and includes that CT current transformer and CT get the electricity private power, and the CT gets the electricity private power and can locate box 10 bottom, easy to assemble to be connected with the monitoring part electricity through the cable, thereby provide the electric energy for it. The CT current transformers may be sleeved on any of the cores 511, and the number of the CT current transformers may be selected according to the power of the device to which the cable 50 is connected, for example, when the power is high, each core 511 is provided with a CT current transformer, or two cores 511 are provided with CT current transformers, so as to provide a reliable and stable power supply.

Here, since the wire core 511 is connected by the separable connector 30, it is not necessary to coat the three-phase wire core 511 with a tape, and thus the installation of the CT current transformer does not affect the original connection structure of the cable 50, and further does not affect the electrical, mechanical, and waterproof properties of the intermediate joint. Meanwhile, the cable junction box 100 of the structure is provided with the box body 10, so that the CT power taking device is protected from outside, and the influence of the external environment can be isolated, so that the use performance of the CT power taking device can be obviously improved, power supply is guaranteed, the setting of a plurality of sensors can be realized, a plurality of online monitoring functions of the cable junction box 100 are realized, and the observability and controllability of the cable junction box are further improved.

The above only be the preferred embodiment of the utility model discloses a not consequently restriction the utility model discloses a patent range, all are in the utility model discloses a conceive, utilize the equivalent structure transform of what the content was done in the description and the attached drawing, or direct/indirect application all is included in other relevant technical field the utility model discloses a patent protection within range.

Claims (10)

1. An intermediate joint structure, comprising:

the two separable connectors are oppositely arranged, each separable connector comprises an insulating shell and a wiring terminal, the insulating shell is provided with a plug hole and a terminal hole which are communicated, one end of the wiring terminal is positioned in the terminal hole and is connected with a cable, and the other end of the wiring terminal extends into the plug hole; and

and the two end parts of the sleeve are electrically connected with the other end of the wiring terminal in the plug hole.

2. The intermediate joint structure of claim 1, wherein the sleeve includes a housing and an electrode, the housing is formed with a mounting groove, the electrode is disposed in the mounting groove, two free ends of the electrode are exposed out of a notch of the mounting groove, and the free ends of the electrode and an end of the terminal are electrically connected in the plug hole.

3. The intermediate joint structure of claim 2, wherein the insulating housing is in a shape of a T-cylinder, the insulating housing has a mounting hole, the mounting hole is horizontally communicated with the plug hole, the terminal hole is perpendicular to and communicated with the plug hole and the mounting hole, and the electrode is in a U-shape.

4. The intermediate joint structure of claim 3, wherein the connection terminal includes a connection piece and a crimping tube connected to the connection piece, the core of the cable is crimped in the crimping tube, a screw hole is formed on the free end surface of the electrode, and the connection piece is screwed to the free end surface of the electrode.

5. The intermediate joint structure of claim 4, wherein the housing is U-shaped, the housing includes a middle portion and two opposite portions connected to two ends of the middle portion, the mounting groove extends through the middle portion and the two opposite portions, the free end faces of the electrodes are exposed out of the groove openings of the mounting groove, and one of the opposite portions is inserted into one of the insertion holes.

6. The intermediate joint structure of claim 4 or 5, wherein the separable connector further comprises a water-proof assembly, the water-proof assembly comprising a flexible sealing layer and a pre-stressed coating layer, the flexible sealing layer covering a connection position of the crimp tube and the wire core, the pre-stressed coating layer covering an outer surface of the flexible sealing layer.

7. The intermediate joint structure of claim 6, wherein the flexible sealing layer is any one of a cold-shrink silicone rubber tube, an elastic latex tube, a one-component curing type polyurethane sealant, a two-component curing type polyurethane sealant, and a liquid silicone rubber; and/or the presence of a gas in the gas,

the prestress coating layer is any one of an organic silicon rubber cold-shrinkable tube, a polyurethane cold-shrinkable tube, a chemical crosslinking polyolefin heat-shrinkable tube and a radiation crosslinking polyolefin heat-shrinkable tube.

8. The intermediate joint structure of claim 2, wherein the insulating housing is made of PVC flame retardant tubing; and/or the presence of a gas in the gas,

the shell is made of epoxy resin.

9. A cable junction box comprising a box body and the intermediate joint structure of any one of claims 1 to 8 disposed within the box body.

10. The cable junction box of claim 9, wherein the box body is made of stainless steel.

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