CN108400569A - A kind of cable intermediate joint of arbitrary section docking - Google Patents

Abstract

The invention discloses a cable intermediate joint with arbitrary cross-section butt joint, which comprises an epoxy shell, a cable joint, a plug-in head, a stress cone, a cone support, a stress cone adapter sleeve, a sealing flange and a heat shrinkable tube, and the cable joint is fixed In the epoxy shell and at both ends of the cable joint, there are sockets that match the plug-in head. The plug-in head is inserted into the socket along the axial direction of the socket. The stress cone is sleeved on the cable and the inner diameter of the stress cone matches the diameter of the cable. , the sealing flange is fixed on the end of the epoxy shell, one end of the stress cone is set on the end of the cable joint, the other end of the stress cone is fixed on the inner side of the sealing flange through the cone holder and the stress cone adapter sleeve, and the heat shrinkable tube is set on the on the sealing flange. The invention effectively solves the problems of butt connection of different diameters, and easily realizes the connection of two cables with arbitrary cross-sections.

Description

A cable intermediate joint with arbitrary cross-section butt joint

technical field

The invention relates to a cable intermediate joint, in particular to a cable intermediate joint with arbitrary cross-section butt joints.

Background technique

The existing medium and low voltage cable joints are mainly silicone rubber cold-shrinkable cable joints and heat-shrinkable joints. The former occupies 80% or more of the domestic market, and Africa accounts for more than 50%. The main domestic competitors are: Changlan Electric Technology Co., Ltd., Guangdong GCA Cable Accessories Co., Ltd., Ankor Power Transmission Engineering Co., Ltd., etc. It is connected with the same cable cross-section, at most cables of one specification adjacent to each other, and any cross-section cannot be connected. If silicone rubber or heat-shrinkable tubes are produced into various cross-sections butt joints, the number of molds is very large, and the demand market is relatively small. Not to mention the price is ridiculously expensive, and they cannot be pre-produced, so they cannot meet market demand.

Contents of the invention

The technical problem to be solved by the present invention is to provide a cable intermediate joint with any cross-section butt joint, which can realize the butt joint of cables with any different cross-section, and the cost is low.

In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is:

A cable intermediate joint with arbitrary cross-section butt joints, characterized in that it includes an epoxy shell, a cable joint, a plug-in head, a stress cone, a cone support, a stress cone adapter sleeve, a sealing flange and a heat shrinkable tube, and the cable joint is fixed In the epoxy shell and at both ends of the cable connector, there are sockets that match the plug-in head. The plug-in head is inserted into the socket along the axial direction of the socket. The stress cone is sleeved on the cable and the inner diameter of the stress cone matches the diameter of the cable. , the sealing flange is fixed on the end of the epoxy shell, one end of the stress cone is set on the end of the cable joint, the other end of the stress cone is fixed on the inner side of the sealing flange through the cone bracket and the stress cone adapter sleeve, and the heat shrinkable tube is set on the on the sealing flange.

Further, the number of the cable joints is three, and the three cable joints are symmetrically distributed in the epoxy housing in an equilateral triangle, and an insulating shielding layer is provided on the outside of each cable joint.

Further, a stop ring is provided between the plug-in head and the stress cone, and the end of the cable joint is provided with a groove matching the stop ring, and the stop ring is set on the cable and is arranged on the end of the cable joint. inside the groove.

Further, the outer surface of the stress cone is composed of two cone surfaces, both of which have a smaller diameter at both ends of the stress cone, and the inside of the cone holder is provided with a taper hole matching the cone surface at the end of the stress cone, The taper sleeve is set on the conical surface of one end of the stress cone, the outer diameter of the taper matches the inner diameter of the hole of the sealing flange, the taper is slidably set in the hole of the sealing flange, and the outside of the stress cone adapter sleeve is provided with external threads, the sealing method An internal thread is provided on the inner wall of the hole of the flange, and the stress cone adapter sleeve is arranged and fixed in the internal thread of the sealing flange.

Further, the heat-shrinkable tube is an arc-shaped bulging sleeve, one end of the heat-shrinkable tube is matched with the sealing flange and sleeved on the sealing flange, and the other end of the heat-shrinkable tube is matched with the cable and sleeved outside the cable.

Further, a screw hole is opened at the end of the epoxy housing, and the sealing flange is fixed in the screw hole at the end of the epoxy housing by bolts.

Compared with the prior art, the present invention has the following advantages and effects: the present invention can effectively solve the problems such as different-diameter docking, and easily realize the connection of two cables with any cross-section. The original three-phase common plug-in inner cone insulation structure not only solves the phase-to-phase insulation, but also forms a three-in-one compact structure. Different diameter butt joint. The design of the stress cone not only solves the problem of butt connection of different diameters, but also eliminates the discharge problem of the insulation shielding layer port of the cable joint.

Description of drawings

Fig. 1 is a schematic diagram of an intermediate joint of cables with arbitrary cross-section butt joints according to the present invention.

Fig. 2 is a side view of a cable intermediate joint with arbitrary cross-section butt joints of the present invention.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are explanations of the present invention and the present invention is not limited to the following examples.

As shown in the figure, a cable intermediate joint with any cross-section butt joint of the present invention includes an epoxy shell 1, a cable joint 2, a plug head 3, a stress cone 4, a cone holder 5, a stress cone adapter sleeve 6, a sealing Flange 7 and heat-shrinkable tube 8, cable joint 2 is fixed in the epoxy housing 1 and the two ends of the cable joint 2 are provided with sockets that match the plug-in head 3, and the plug-in head 3 is inserted into the plug-in hole axially. In the hole, the stress cone 4 is set on the cable and the inner diameter of the stress cone 4 matches the cable diameter, the sealing flange 7 is fixed on the end of the epoxy shell 1, one end of the stress cone 4 is set on the end of the cable joint 2, and the stress cone 4 The other end is fixed on the inner side of the sealing flange 7 through the cone bracket 5 and the stress cone adapter sleeve 6, and the heat shrinkable tube 8 is sleeved on the sealing flange 7.

The number of cable joints 2 is three, and the three cable joints 2 are symmetrically distributed in the epoxy housing 1 in an equilateral triangle, and an insulating shielding layer 9 is provided on the outside of each cable joint 2 . The original three-phase common plug-in inner cone insulation structure not only solves the phase-to-phase insulation, but also forms a three-in-one compact structure.

A stop ring 10 is arranged between the plug head 3 and the stress cone 4, and the end of the cable joint 2 is provided with a groove matching the stop ring 10, and the stop ring 10 is sleeved on the cable and arranged at the end of the cable joint 2 in the groove of the part. The outer surface of the stress cone 4 is composed of two conical surfaces, both of which are smaller in diameter at both ends of the stress cone 4, and the inner side of the cone support 5 is provided with a conical hole matching the conical surface of the end of the stress cone 4. The support 5 is set on the conical surface at one end of the stress cone 4, the outer diameter of the cone support 5 matches the inner diameter of the hole of the sealing flange 7, the cone support 5 is slidably set in the hole of the sealing flange 7, and the stress cone adapter sleeve 6 is set outside There are external threads, the inner wall of the hole of the sealing flange 7 is provided with internal threads, and the stress cone adapter sleeve 6 is arranged and fixed in the internal threads of the sealing flange 7 . The heat-shrinkable tube 8 is an arc-shaped bulging sleeve. One end of the heat-shrinkable tube 8 matches the sealing flange 7 and is set on the sealing flange 7. The other end of the heat-shrinkable tube 8 matches the cable and is set outside the cable. When installing , first wrap a layer of waterproof tape on the sealing flange and the cable, then set the heat-shrinkable tube 8 and fix it by heat-shrinkage to form an effective seal.

There is a screw hole at the end of the epoxy housing 1, and the sealing flange 7 is fixed in the screw hole at the end of the epoxy housing 1 by bolts.

The shape of the stress cone of the cable intermediate joint with any cross-section butt joint of the present invention is unchanged, so we can realize the installation of any cross-section by changing the inner diameter of the stress cone. The epoxy body is left-right symmetrical, so we can finally achieve any cross-section butt joint. The fracture of the cable insulation shielding layer is pointed, which will generate electric field concentration, and the stress is close to the cable shielding fracture and insulation to connect the cable insulation shielding layer. Since the end of the stress cone is a circular arc, it avoids the generation of tip discharge and evens the electric field.

At present, this product is suitable for the connection of two cables with any cross-section of 8.7/10kV-400mm² or below. The invention can realize the plug-and-plug connection of any cable cross-section, is equipped with a shell for protection, can realize buried installation, is explosion-proof, fire-proof and waterproof. Small size, relatively low cost and easy installation.

The above content described in this specification is only an illustration of the present invention. Those skilled in the technical field to which the present invention belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, as long as they do not deviate from the content of the present invention specification or exceed the scope defined in the claims, all should Belong to the protection scope of the present invention.

Claims (6)

1. a kind of cable intermediate joint of arbitrary section docking, it is characterised in that：Including epoxy shell, cable connector, connect-disconnect plug, Stress cone, cone support, stress cone sleeve, sealing flange and heat-shrink tube, cable connector is fixed in epoxy shell and cable connects Being provided at both ends with for head is axially inserted into along jack in jack with the matched jack of connect-disconnect plug, connect-disconnect plug, and stress cone is set in cable Upper and stress cone internal diameter is matched with cable size, and sealing flange is fixed at epoxy shell end, the setting of stress cone one end In cable connector end, the stress cone other end is fixed on by boring support and stress cone sleeve on the inside of sealing flange, shrinkable sleeve It is located on sealing flange.

2. a kind of cable intermediate joint of arbitrary section docking described in accordance with the claim 1, it is characterised in that：The cable connects Head quantity is three, and three cable connectors are symmetrically distributed in equilateral triangle in epoxy shell, and on the outside of each cable connector It is both provided with insulation screen.

3. a kind of cable intermediate joint of arbitrary section docking described in accordance with the claim 1, it is characterised in that：The connect-disconnect plug Locating snap ring is provided between stress cone, cable connector end set has is set in electricity with the matched groove of locating snap ring, locating snap ring On cable and it is arranged in the groove of cable connector end.

4. a kind of cable intermediate joint of arbitrary section docking described in accordance with the claim 3, it is characterised in that：The stress cone Lateral surface be made of two conical surfaces, two conical surfaces are that stress cone both ends end diameter is smaller, cone support inside be provided with and answer The matched taper hole of the power tapered end portion conical surface, cone care set are located in one end cone face of stress cone, the hole internal diameter of cone support outer diameter and sealing flange Matching, cone support are slidably arranged in the hole of sealing flange, and external screw thread, the hole of sealing flange are provided on the outside of stress cone sleeve Internal thread is provided on inner wall, stress cone tightening is set in the internal thread of sealing flange and fixed.

5. a kind of cable intermediate joint of arbitrary section docking described in accordance with the claim 1, it is characterised in that：The heat-shrink tube Casing is heaved for arc, heat-shrink tube one end is matched with sealing flange to be set on sealing flange, the heat-shrink tube other end and cable With being set on the outside of cable.

6. a kind of cable intermediate joint of arbitrary section docking described in accordance with the claim 1, it is characterised in that：The epoxy shell Body end portion is provided with screw hole, and sealing flange is bolted in epoxy shell end screw hole.