KR102469422B1 - Conductor sleeve and cable connector having the same - Google Patents

Abstract

The present invention relates to a conductor sleeve for a cable connector and a cable connector including the same. Specifically, the present invention relates to a conductor sleeve for a cable connector capable of solving problems of resistance increase and heat generation in a conductor connection portion of a cable connector and facilitating cable connection construction, and a cable connector including the same.

Description

Conductor sleeve and cable connector including the same {Conductor sleeve and cable connector having the same}

The present invention relates to a conductor sleeve for a cable connector and a cable connector including the same. Specifically, the present invention relates to a conductor sleeve for a cable connector capable of solving problems of resistance increase and heat generation in a conductor connection portion of a cable connector and facilitating cable connection construction, and a cable connector including the same.

Power cables usually use copper (Cu) conductors as conductors. On the other hand, the use of aluminum (Al) conductors, which have a low conductivity of about 66% of copper (Cu) but are light and inexpensive, tend to increase.

1 schematically illustrates various embodiments of cross-sectional shapes of cable conductors. Specifically, FIG. 1A is a circular twisted wire conductor in which a plurality of wires having a circular cross section are united in a circular shape as a whole, FIG. 1B is a circular compressed conductor in which a plurality of wire wires having a circular cross section are compressed into a circular shape as a whole, and FIG. 1C is a circular compressed conductor having a circular cross section. It schematically shows the cross-section of a split-compressed circular conductor in which a plurality of sections compressed into a fan shape are united in a circular shape as a whole.

As a connection method of such a cable conductor, there is a method using a conductor sleeve for a bolt connector shown in FIG. 2, a conductor sleeve for a crimp connector shown in FIG. 3, and the like. As shown in FIGS. 2 and 3, each connection portion of the connected cables 200a, 200b, 200a', 200b' is a conductor sleeve 300 for a bolt connector where the conductors 210a, 210b, 210a', 210b' Alternatively, insulators (220a, 220b, 220a', 220b') and external semiconductive layers (230a, 230b, 230a', 230b') to be inserted into the conductor insertion grooves (320, 320') of the conductor sleeve (300') for crimp connector and the sheath jackets 240a, 240b, 240a' and 240b' are partially removed.

Here, as shown in FIG. 2, the conductor sleeve 300 for the bolt connector has a conductor insertion groove 320 into which the conductors 210a and 210b are inserted, respectively, and the conductors 210a and 210b are inserted at a certain length. It may include an intermediate bulkhead 330, a plurality of bolt fasteners 310 into which bolts 400 for pressing and fixing the inserted conductors 210a and 210b are inserted, and the like.

In addition, as shown in FIG. 3, the conductor sleeve 300' for the crimp connector includes a conductor insertion groove 320' into which the conductors 210a' and 210b' are respectively inserted, and the conductors 210a' and 210b'. ) may include a plurality of compression grooves 310' formed by a compression machine to fix the intermediate partition wall 330 'and the inserted conductors 210a' and 210b' to be inserted at a certain length. .

Meanwhile, FIG. 4 is an enlarged view of a broken line portion in FIG. 2 . As shown in FIG. 4, the conductors 210a and 210b inserted into the conductor insertion groove 320 of the conductor sleeve 300 constitute the conductors 210a and 210b by pressing the bolt 400. Some of the wires are bent, so that the wires are spaced apart from the middle partition wall 330 of the conductor sleeve 300, and the current path between the conductors 210a and 210b and the conductor sleeve 300 is reduced, resulting in This may cause an increase in resistance and heat generation at the cable connection.

In the conductor sleeve 300' shown in FIG. 3, some of the wires of the conductors 210a' and 210b' respectively inserted into the conductor insertion groove 320' are bent by pressing by compression, and as a result, the wires A separation from the middle bulkhead 330' of the sleeve 300' may cause the same problem.

Therefore, there is an urgent need for a new type of conductor connection method capable of solving the problem of resistance increase and heat generation in the cable connection part and a cable connector used therefor.

An object of the present invention is to provide a new type of conductor sleeve for cable connectors and a cable connector including the same, which can solve the problems of resistance increase and heat generation in cable connection parts.

In addition, an object of the present invention is to provide a conductor sleeve for a cable connector for easy cable connection construction and a cable connector including the same.

In order to solve the above problems, the present invention,

A conductor sleeve for a cable connector, comprising: two or more conductor insertion grooves into which conductors of a connected cable are inserted; a conductor fixing part for fixing the conductor inserted into the conductor insertion groove; an insertion control unit allowing the conductor inserted into the conductor insertion groove to be inserted at a predetermined length; and an intermediate connection portion physically connecting an end of the conductor inserted into the conductor insertion groove and the insertion control unit.

Here, the insertion control part is an intermediate barrier rib, and the intermediate connection part is a coating layer made of an electrically conductive material or an elastic layer made of an electrically conductive material and having elasticity.

In addition, the elastic layer provides a conductor sleeve, characterized in that it includes a plurality of springs.

And, the spring provides a conductor sleeve characterized in that the diameter is 2.7 mm or less and the length is 5 mm or more.

On the other hand, it provides a conductor sleeve, characterized in that made of copper, aluminum or aluminum alloy.

In addition, the outer diameter of the conductor sleeve is equal to or less than the outer diameter of the insulation layer of the cable + 5 mm, and the diameter of the conductor insertion groove having a circular cross section is 1.01 × outer diameter of the conductor + α, where α is the cross-sectional area of the conductor of 800 to 1,600 ㎟ It is 1.7 or less in the case of , and 1.6 or less in the case of the cross-sectional area of the conductor of 1,800 to 2,500 mm2.

Further, the conductor is a divided compressed circular conductor composed of a plurality of wires having a circular cross section and a plurality of sections compressed into a fan shape combined in a circular shape as a whole, and the conductor fixing unit fixes the conductor inserted into the conductor insertion groove. The bolt fastener into which the bolt is inserted includes one or more rows of bolt fasteners arranged in a row along the circumferential direction of the conductor sleeve for more than the number of sections of the divided compressed circular conductor, the conductor sleeve to provide.

Here, a bolt end inserted into each of a plurality of bolt fasteners included in at least one bolt fastener row among the bolt fastener rows disposed in each of the conductor insertion grooves is the center of each section constituting the divided compressed circular conductor. A conductor sleeve is provided, which is characterized by reaching a wire.

In addition, the number of bolt fasteners included in one bolt fastener row is equal to the number of sections constituting the divided compressed circular conductor, and a plurality of bolt fasteners included in one bolt fastener row are arranged at equal intervals , A rotation angle (θ) between adjacent rows of bolt fasteners among a plurality of rows of bolt fasteners disposed in each of the conductor insertion grooves is defined by Equation 1 below.

[Equation 1]

Hot rotation angle (θ) = {(360/X)+Z}/(Y+1)

In Equation 1 above,

X is the number of fan-shaped sections constituting the divided compressed circular conductor,

Y is the number of rows of bolt fasteners arranged in each conductor insertion groove and bolt fasteners arranged in a row,

Z is the rotation angle defined by (the length of the conductor inserted into the conductor insertion groove/the pitch of the inserted conductor) x 360.

It provides a cable connector including a plurality of bolts fastened to the conductor sleeve and each of the plurality of bolt fasteners.

Here, the bolt includes a head that can be fastened to a mechanism or equipment to be inserted into the bolt fastener, a screw thread having a male screw corresponding to a female screw on an inner wall of the bolt fastener, and disposed at a lower end of the screw thread and constituting the conductor. It provides a cable connector including a protruding portion that can be inserted between the connected strands and a break portion disposed between the head and the screw thread portion and broken by applying a predetermined torque to the bolt.

In addition, the cable connector further includes a stopper disposed between the screw thread portion and the break portion and suppressing insertion of the bolt to increase torque applied to the bolt.

And, the protruding portion provides a cable connector, characterized in that it has an inclined shape in which the cross-sectional area gradually decreases in whole or in part.

Furthermore, when the end of the protruding portion comes into contact with the central wire of the section constituting the divided and compressed circular conductor, the break portion is broken.

In addition, it provides a cable connector, characterized in that the predetermined torque is 50 to 150 N m.

On the other hand, the bolt provides a cable connector, characterized in that made of copper or brass or aluminum alloy having a tensile strength of 250 MPa or more and an electrical conductivity of 25% (@ 20 ℃) compared to pure copper.

And, the bolt provides a cable connector characterized in that at least the threaded portion, the protruding portion and the stopper are plated with tin.

The conductor sleeve for a cable connector according to the present invention exhibits an excellent effect of solving the problem of resistance increase and heat generation in the cable connection part by increasing the current path through sufficient physical contact between the inserted conductor and the intermediate bulkhead.

In addition, the conductor sleeve for a cable connector according to the present invention exhibits an excellent effect of facilitating cable connection construction because a corona shield for matching the outer diameter of the conductor sleeve and the outer diameter of the insulation may not be used.

1 schematically illustrates various embodiments of cross-sectional shapes of cable conductors.
2 schematically shows a state in which conductors of adjacent cables are connected to each other by a conventional bolt connector.
3 schematically shows a state in which conductors of adjacent cables are connected to each other by a conventional crimp connector.
FIG. 4 is an enlarged view of a broken line portion in FIG. 2 .
5 schematically illustrates an embodiment of a conductor sleeve for a cable connector according to the present invention.
6 schematically shows embodiments of a spring as an intermediate connecting portion in a conductor sleeve for a cable connector according to the present invention.
7 schematically illustrates another embodiment of an intermediate connection portion in a conductor sleeve for a cable connector according to the present invention.
FIG. 8 schematically shows cross sections BB' and CC' in FIG. 5 .
9 schematically illustrates an embodiment of a shear bolt used in a cable connector according to the present invention.
FIG. 10 is a schematic view of a cable connector in which a conductor of a cable is inserted into the conductor sleeve shown in FIG. 5 and a bolt fixing the conductor and conducting electricity thereto is inserted.

Hereinafter, preferred embodiments of the present invention will be described in detail. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided so that the disclosed content will be thorough and complete, and the spirit of the present invention will be sufficiently conveyed to those skilled in the art. Like reference numbers indicate like elements throughout the specification.

5 shows an embodiment of a conductor sleeve for a cable connector according to the present invention.

As shown in FIGS. 5A and 5B, the conductor sleeve 500 for a cable connector according to the present invention includes two or more conductor insertion grooves 520 having a cross section corresponding to the cross section of a conductor to be inserted, the conductor insertion groove 520 ), a conductor fixing unit 510 for fixing each of the conductors inserted into the conductor insertion groove 520, an insertion control unit 530 for allowing the conductors each to be inserted into the conductor insertion groove 520 at a certain length, and the conductor insertion groove 520. ) may include an intermediate connection part 540 physically connecting the ends of the conductors inserted into each of the insertion control parts 530.

The conductor sleeve 500 may have a cylindrical column shape as a whole when the cross section of each conductor inserted into its conductor insertion groove 520 is circular, and the material is copper or copper alloy with excellent electrical properties or light and lightweight aluminum. Or it may be made of an aluminum alloy.

In addition, the outer diameter of the conductor sleeve 500 may be equal to or less than the outer diameter of the insulating layer of the cable to be connected + 5 mm. For example, when the outer diameter of the insulation layer of the cable to be connected is 120 mm, the outer diameter of the conductor sleeve may be 125 mm or less. In order to insulate the conductor sleeve 500 during cable connection construction, the conductor sleeve 500 and the insulation layer of the connected cable are covered together with a silicone tube, etc. The outer diameter of the conductor sleeve 500 is the outer diameter of the cable insulation layer. If it is excessively large compared to the silicone tube, it may be difficult to cover them together or the silicone tube may be damaged.

Also, the entire length of the conductor sleeve 500 can be appropriately adjusted according to the desired resistance at the cable connection part. The shorter the length of the conductor sleeve 500, the shorter the overall length of the cable connector, so it is advantageous in terms of price or construction. However, when the length of the conductor sleeve 500 is excessively short, the conductor of the cable and the conductor sleeve 500 Resistance may increase as the cross-sectional area of contact with is reduced. The total length of the conductor sleeve 500 may be, for example, about 20 to 30 cm.

The insertion control unit 530 is not particularly limited as long as it can limit the insertion length of each conductor inserted into the conductor insertion groove 520 of the conductor sleeve 500. For example, as shown in FIG. 5B It may be a bulkhead.

In addition, in the intermediate connection part 540, after the conductors of the cable to be connected are inserted into the conductor insertion grooves 520 of the conductor sleeve 500, some of the conductor wires are bent by pressing by the conductor fixing part 510. If their ends are spaced apart from the insertion control unit 530, it is not particularly limited as long as it performs a function of physically contacting and connecting the insertion control unit 530 and some of the conductor wires spaced apart therefrom, for example, As shown in FIG. 5B, it may be a coating layer made of an electrically conductive material or an elastic layer such as a sponge having elasticity, particularly a plurality of springs as shown in FIG. 5C.

Since the conductor sleeve according to the present invention enables sufficient physical contact between the end of the conductor inserted into the conductor sleeve 500 and the insertion control part 530 by the intermediate connection part 540 and thereby maximizes the current pass, the cable It can effectively solve the problem of resistance increase and heat generation in the connection part.

In particular, when the intermediate connection part 540 includes a plurality of springs as shown in FIG. 5C, the plurality of springs contract when the conductor is inserted into the conductor insertion groove 520 of the conductor sleeve 500. And, when the conductor is pressed by the conductor fixing part 510, some of the conductor wires are bent and separated from the insertion control unit 530. It can expand while maintaining physical contact with the field.

The spring as the intermediate connection part 540 may have a shape as shown in FIGS. 6A to 6C , for example. The spring has a circular cross section as shown in FIG. 6A, or a prismatic cross section as shown in FIG. 6B and is bent in a circular shape as a whole, or a prismatic cross section as shown in FIG. It can be. In addition, the diameter of the spring may be less than the diameter of the conductor wire, for example, about 2.7 mm or less, and the length of the spring may be about 5 mm or more. And, the spring may be made of a conductive metal such as iron, copper, aluminum or an alloy containing these.

7 schematically illustrates another embodiment of an intermediate connection portion in a conductor sleeve for a cable connector according to the present invention.

As shown in FIG. 7 , one or more elastic members having a bending structure and made of a material having elasticity may be provided as the intermediate connection part 540 . In the elastic member, when the conductor is inserted into the conductor insertion groove 520 of the conductor sleeve 500, the bent angle decreases, and some of the conductor wires are bent when the conductor is pressed by the conductor fixing part 510. Thus, when separated from the insertion control unit 530, bending strength may be increased while maintaining physical contact with some of the elastic members physically contacting the separated conductor wires.

For example, as shown in FIG. 5 , the conductor fixing part 510 may include a plurality of bolt fasteners into which shear bolts that press the conductor or are inserted between the conductors to conduct electricity thereto are inserted.

As shown in FIG. 5, as the conductor fixing part 510, the bolt fastener has a female thread corresponding to the male thread of the shear bolt formed on the inner surface so that the shear bolt can be fastened, and the conductor sleeve 500 has a circumferential direction. A plurality of bolt fasteners may be disposed in one row, and there may be a plurality of rows of bolt fasteners disposed in each of the conductor insertion grooves 520 of the conductor sleeve 500 and including the plurality of bolt fasteners in a row.

In addition, when the conductor inserted into the conductor sleeve 500 is a divided compression circular conductor as shown in FIG. may be more than the number of sections of

In this case, the end of each of the plurality of shear bolts respectively inserted into the plurality of bolt fasteners arranged in the one row of bolt fasteners reaches the central wire of each section so that sufficient current passes between the conductor and the shear bolt. By being formed, it is possible to reduce the resistance at the cable connection part and further solve the problem of heat generation due to the increase in resistance.

FIG. 8 shows cross-sections BB' and CC' in FIG. 5A.

Insertion of the conductor sleeve 500, as shown in FIG. On one side of the intermediate bulkhead as the adjusting unit 530, a plurality of bolt fasteners included in the row of bolt fasteners are arranged at equal intervals, and adjacent rows of bolt fasteners in which a plurality of bolt fasteners are arranged in a row are mutually They are arranged at regular intervals so as not to overlap, and an inter-row rotation angle (θ) between adjacent rows of bolt fasteners may be defined by Equation 1 below.

[Equation 1]

Hot rotation angle (θ) = {(360/X)+Z}/(Y+1)

In Equation 1 above,

X is the number of fan-shaped sections constituting the divided compressed circular conductor,

Y is the number of rows of bolt fasteners arranged in each conductor insertion groove and bolt fasteners arranged in a row,

Z is the rotation angle defined by (the length of the conductor inserted into the conductor insertion groove/the pitch of the inserted conductor) x 360.

For example, assuming that the length of the conductor inserted into one side of the conductor sleeve 500 is 100 mm and the pitch of the inserted conductor is 1,600 mm, the rotation angle (Z) of the conductor inserted into one side of the conductor sleeve 500 is 22.8 °, the rotation angle between rows (θ ) is {(360/4) + 22.8} / (5 + 1) = 18.8 °, the number (X) of fan-shaped sections constituting the divided compression circular conductor is 6, and the bolt fasteners are arranged in a row When the number of bolt fastener rows (Y) is 6, the rotation angle (θ) between rows is {(360/6)+22.8}/(6+1)=11.8°.

That is, when the number and position of the bolt fasteners disposed on the conductor sleeve 500 satisfy Equation 1, which is a correlation between the rotation angle θ between the rows and the number Y of the bolt fastener rows, the plurality The end of each shear bolt inserted into the bolt fastener in at least one of the bolt fastener columns reaches the central wire of the fan-shaped section constituting the divided compressed circular conductor to form a sufficient current path, As a result, the resistance at the cable connection can be reduced to 90% or less compared to the conductor resistance of the cable, and the heat generation problem caused by the increased resistance can be further solved.

The conductor insertion groove 520 into which each conductor of the connected cable is inserted has a cross section corresponding to the cross section of the conductor, and when the cross section of the conductor is circular, the conductor insertion groove 520 has a circular cross section corresponding to the cross section of the conductor. ) may be 1.01 × conductor outer diameter (mm) + α (mm). Here, α may be different depending on the conductor cross-sectional area, and may be, for example, 1.7 mm or less when the conductor cross-sectional area is 800 to 1,600 mm 2 , and 1.6 mm or less when the conductor cross-sectional area is 1,800 to 2,500 mm 2 .

When the diameter of the conductor insertion groove 520 is less than 1.01 × conductor outer diameter + α, the conductor fixing part 510 may lack a space for inserting the shear bolt through the bolt fastener, whereas the conductor insertion groove 520 ) is greater than 1.01 × conductor outer diameter + α, the shear bolt inserted through the bolt fastener does not reach the central wire of the fan-shaped section constituting the divided compressed circular conductor, so that a sufficient current path cannot be formed. Resistance increases and heating problems may occur.

9 schematically illustrates an embodiment of a shear bolt used in a cable connector according to the present invention.

As shown in FIG. 9, the shear bolt 100 according to the present invention is fastened to a mechanism or equipment for inserting the shear bolt 100 into a bolt fastener as a conductor fixing part 520 of the conductor sleeve 500. A head 110 that can be, a threaded portion 120 to which a male thread corresponding to the female thread of the inner wall of the bolt fastener is applied, disposed between the head 110 and the threaded portion 120 and attached to the shear bolt 100 A fracture portion 130 that breaks when a torque of a certain level or higher is applied, and is disposed between the screw thread portion 120 and the fracture portion 130 and suppresses the insertion of the shear bolt 100, thereby suppressing the shear bolt A stopper (140) for increasing the torque applied to (100), disposed at the lower end of the threaded portion (120) and inserted into the conductor of the cable inserted into the conductor sleeve (500). It may include a protrusion 150 having an inclined shape so that its cross-sectional area gradually decreases in whole or in part.

Also, FIG. 10 schematically shows a cable connector in which a conductor of a cable is inserted into the conductor sleeve shown in FIG. 5 and a shear bolt 100 that fixes the conductor and conducts electricity thereto is inserted.

As shown in FIG. 10, the shear bolt 100 is a conductor fixing part 510 of the conductor sleeve 500, and when inserted into the bolt fastener, the protruding part 150 of the conductor sleeve 500 It is inserted between the combined conductor wires constituting the conductor 210b inserted into the conductor insertion groove 520, and pushes the conductor wires in the left and right directions perpendicular to the moving direction of the shear bolt 100.

As a result, the combined conductor wires constituting the conductor 210b come into close contact with each other, and in particular, the outermost conductor wires among the wires are in close physical contact with the inner wall of the conductor sleeve 500, Furthermore, the contact area between the shear bolt 100 and the conductor wires increases, so that a current path connecting the conductor 210b, the conductor sleeve 500 and the shear bolt 100 is formed. By doing so, resistance increase can be further avoided or minimized.

In addition, the protruding part 150 of the shear bolt 100 is inserted between the combined conductor wires constituting the conductor 210b to push the conductor wires, so that the protruding part 150 and the conductor wires or the conductor It is possible to avoid or minimize the increase in resistance due to the oxide film by causing friction between the wires, thereby removing the oxide film on the surface of the aluminum wire.

As a result, the shear bolt 100 forms a sufficient current path in the conductor connection portion by the conductor sleeve 500, and avoids an increase in resistance due to the oxide film on the surface of the conductor wires constituting the conductor 210b. By minimizing or minimizing it, it shows an excellent effect that can effectively solve the heating problem caused by the local increase in resistance at the connection part of the cable conductor.

Specifically, the shear bolt 100 may be made of a metal material having a tensile strength of about 250 MPa or more and an electrical conductivity of about 25% (@20 ° C.) or more compared to pure copper. If the tensile strength of the shear bolt 100 is less than 250 MPa, it may be difficult to form a sufficient current path by being broken before being inserted between the combined conductor wires constituting the conductor, and also the electrical If the conductivity is less than 25% (@20℃) compared to pure copper, the resistance at the conductor junction of the cable may increase significantly. Here, the shear bolt 100 may be made of, for example, a metal such as copper, brass, or aluminum alloy having better electrical conductivity than brass.

The screw thread part 120 is the conductor fixing part 510 of the conductor sleeve 500, and a male screw corresponding to the female screw of the inner wall of the bolt fastener 510 is formed, and the male screw engages with the female screw and rotates. The shear bolt 100 moves in the direction of the conductor 210b inserted into the conductor insertion groove 520 of the conductor sleeve 500, and as a result, the protrusion 150 of the shear bolt 100 By being inserted between the combined conductor wires constituting the conductor 210b, the conductor wires are pushed in a lateral direction perpendicular to the traveling direction of the shear bolt 100.

The standard of the screw thread formed on the threaded portion 120 is that if the protruding portion 150 of the shear bolt 100 is sufficiently inserted between the connected wire constituting the conductor 210b, a sufficient current path can be formed. It is not particularly limited, and for example, the maximum outer diameter of the male screw is Φ12 to Φ20, the pitch of the screw thread is 1 to 3 mm, and the number of screws per unit length (1 inch) may be 8 to 26.

In addition, the length of the threaded portion 120 may be different depending on how the wire constituting the conductor 210b inserted into the conductor insertion groove 520 of the conductor sleeve 500 is combined.

For example, in the case where the conductor 210b is the divided compressed circular conductor shown in FIG. It may have a length that allows contact with the central wire of each section constituting the divided compressed circular conductor.

In addition, the threaded portion 120 may have a length such that it does not protrude beyond the surface of the conductor sleeve 500 when the breakable portion 130 described below is broken. If the threaded portion 120 protrudes from the outer surface of the conductor sleeve 500 when the breakage part 130 is broken, an operation of wrapping the upper part of the conductor sleeve 500 with a rubber tube made of a material such as silicon is performed. It can be difficult.

The protruding part 150 rotates when the male screw constituting the threaded part 120 of the shear bolt 100 engages with the female screw of the inner wall of the bolt fastener as the conductor fixing part 510 of the conductor sleeve 500. If the shear bolt 100 can be inserted between the connected conductor wires constituting the conductor 210b when moving in the direction of the conductor 210b inserted into the conductor insertion groove 520 of the conductor sleeve 500 There is no particular limitation on its shape.

For example, as shown in FIGS. 9a, 9b, and 9d, the protrusion 150 has a cone shape with a gradually decreasing cross-sectional area as a whole, and the end of the cone is a hemisphere or circle shape with a radius of 2.5 to 8 mm, or FIG. 9c As shown in , the overall cylindrical shape and the end of the cylinder may have a conical shape with a gradually decreasing cross-sectional area.

In addition, the length of the protruding portion 150 may be different depending on how the wire constituting the conductor 210b inserted into the conductor insertion groove 520 of the conductor sleeve 500 is combined.

For example, when the conductor 210b is a divided compressed circular conductor shown in FIG. It may have a length that allows contact with the central wire of each section constituting the compressed circular conductor. For example, the protrusion 130 may have a length of 4 to 10 mm.

Also, the protruding portion 150 may have a length such that the threaded portion 120 does not protrude beyond the surface of the conductor sleeve 500 when the breakable portion 130 described below is broken. If the threaded portion 120 protrudes from the outer surface of the conductor sleeve 500 when the breakage part 130 is broken, an operation of wrapping the upper part of the conductor sleeve 500 with a rubber tube made of a material such as silicon is performed. It can be difficult.

The breakage part 130 occurs when the end of the protruding part 150 of the shear bolt 100 contacts the central wire of each section constituting the divided compressed circular conductor shown in FIG. 1C, the shear bolt 100 By being broken by a specific torque applied to, it performs a function of controlling the shear bolt 100 so that it can no longer be inserted. Here, the predetermined torque applied to the shear bolt 100 when the fracture portion 130 is broken may be about 50 to 150 N·m.

The breakable part 130 is not particularly limited in shape as long as it can perform a function of being broken when a predetermined torque is applied. For example, the fractured portion 130 may have a conical shape with a gradually decreasing diameter, and may have a different diameter depending on the material constituting the fractured portion 130, but the fractured portion 130 may be made of brass. When made of, the diameter may be Φ8 to Φ14.

When the end of the protruding portion 150 of the shear bolt 100 contacts the center wire of the circular twisted wire conductor shown in FIG. 1A or the circular compressed conductor shown in FIG. 1B, or the split compressed circular conductor shown in FIG. 1C When reaching the central wire of one section constituting the, the insertion of the shear bolt 100 is suppressed by the stopper 140, thereby increasing the torque applied to the shear bolt 100, the When the torque reaches a predetermined specific torque value, the breakable part 130 is broken, so that the breakable part 130 and the head 110 are separated. Here, the predetermined torque applied to the shear bolt 100 when the fracture portion 130 is broken may be about 50 to 150 N·m.

The conductor 210b inserted into the conductor insertion groove 520 of the conductor sleeve 500 is a divided compressed circular conductor, and a plurality of shear bolts 100 are directed toward the central wire of each section of the divided compressed circular conductor. When sequentially inserted, as the number of shear bolts 100 to be inserted increases, the empty space inside the conductor insertion groove 320 gradually decreases.

That is, the resistance of the conductor to the insertion of the shear bolt 100 inserted first is smaller than the resistance of the conductor to the insertion of the shear bolt 100 inserted later, so that the shear bolt 100 inserted first is Compared to the inserted shear bolt 100, it is inserted more easily and is inserted more deeply.

Therefore, as shown in FIG. 10, when a plurality of shear bolts 100 are inserted into the conductor sleeve 500, all the shear bolts 100 to be inserted, especially the protrusions of the first shear bolt 100 are inserted. (150) It is necessary to control it so that it is no longer inserted after the end comes into contact with the central wire of each section constituting the divided compressed circular conductor, and the stopper 140 performs this control function.

That is, the stopper 140 suppresses the insertion of the shear bolt 100 in a state in which the end of the protrusion 150 of the shear bolt 100 is in contact with the central wire of one or more sections constituting the divided compressed circular conductor, By increasing the torque applied to the shear bolt 100, the breaking portion 130 may be broken.

Thus, when the end of the protruding portion 150 of the shear bolt 100 contacts the central wire of one section constituting the divided compressed circular conductor, the insertion of the shear bolt 100 is stopped, thereby stopping the conductor 210b. ), the formation of an optimal current path between the conductor sleeve 500 and the shear bolt 100 and resistance reduction can be further achieved.

In the shear bolt 100 according to the present invention, at least the threaded portion 120, the stopper 140, and the protruding portion 150 may be plated with tin. When the shear bolt 100 and the conductor sleeve 500 or the conductor 210b are different metals, dissimilar metal contact corrosion, that is, galvanic corrosion, may occur at their contact surfaces, such galvanic corrosion. It is to plate tin as a sacrificial metal to suppress.

The tin plating not only suppresses corrosion of the shear bolt 100, the conductor 210b, the conductor sleeve 500, etc., but also the male screw of the threaded portion 120 and the bolt of the conductor sleeve 500. By increasing the contact area between the shear bolt 100 and the conductor sleeve 500, such as filling a minute empty space between female threads on the inner wall of the fastener, a sufficient current path can be formed and resistance can be further reduced. have.

Although this specification has been described with reference to preferred embodiments of the present invention, those skilled in the art can variously modify and change the present invention within the scope not departing from the spirit and scope of the present invention described in the claims described below. will be able to carry out Therefore, if the modified implementation basically includes the elements of the claims of the present invention, all of them should be considered to be included in the technical scope of the present invention.

100: shear bolt 200: cable
300,300',500: conductor sleeve 400: bolt

Claims (17)

As a conductor sleeve for cable connectors,
two or more conductor insertion grooves into which the conductors of the connected cables are inserted;
a conductor fixing part for fixing the conductor inserted into the conductor insertion groove;
an insertion control unit allowing the conductor inserted into the conductor insertion groove to be inserted at a predetermined length; and
And an intermediate connection portion physically connecting an end of the conductor inserted into the conductor insertion groove and the insertion control portion,
The conductor is a divided compressed circular conductor in which a plurality of sections made of a plurality of wires and compressed into a fan shape are united in a circular shape as a whole,
The conductor fixing part includes one or more rows of bolt fasteners in which a plurality of bolt fasteners into which bolts for fixing the conductor inserted into the conductor insertion groove are inserted are arranged in a line along the circumferential direction of the conductor sleeve,
Characterized in that, the end of one or more bolts of the plurality of bolts inserted into the plurality of bolt fasteners reaches the center wire of each of the plurality of sections. According to claim 1,
The conductor sleeve, characterized in that the insertion control portion is an intermediate barrier rib, and the intermediate connection portion is a coating layer made of an electrically conductive material or an elastic layer made of an electrically conductive material and having elasticity. According to claim 2,
The elastic layer is characterized in that it comprises a plurality of springs, the conductor sleeve. According to claim 3,
The conductor sleeve according to claim 1, wherein the spring has a diameter of 2.7 mm or less and a length of 5 mm or more. delete According to any one of claims 1 to 4,
The outer diameter of the conductor sleeve is equal to or less than the outer diameter of the insulation layer of the cable + 5 mm, and the diameter of the conductor insertion groove having a circular cross section is 1.01 × conductor outer diameter (mm) + α (mm),
Wherein α is 1.7 mm or less when the cross-sectional area of the conductor is 800 to 1,600 mm 2 , and is 1.6 mm or less when the cross-sectional area of the conductor is 1,800 to 2,500 mm 2 . According to any one of claims 1 to 4,
The conductor is a divided compressed circular conductor in which a plurality of sections compressed into a fan shape are combined in a circular shape as a whole, composed of a plurality of wire having a circular cross section, and
In the conductor fixing part, one or more bolt fasteners into which bolts for fixing the conductor inserted into the conductor insertion groove are inserted are arranged in a line along the circumferential direction of the conductor sleeve in a number greater than the number of sections of the divided and compressed circular conductor. Conductor sleeve, characterized in that it comprises a row of fasteners. According to claim 7,
An end of a bolt inserted into each of a plurality of bolt fasteners included in at least one bolt fastener row among the bolt fastener columns disposed in each of the conductor insertion grooves is connected to the center wire of each section constituting the divided compressed circular conductor. Conductive sleeve, characterized in that reaching. delete A cable connector comprising the conductor sleeve of claim 7 and a plurality of bolts fastened to each of the plurality of bolt fasteners. According to claim 10,
The bolt includes a head that can be fastened to a mechanism or equipment to be inserted into the bolt fastener, a screw thread portion having a male screw corresponding to the female screw of the inner wall of the bolt fastener, and a union disposed at the lower end of the screw thread portion and constituting the conductor. A cable connector comprising: a protruding portion that can be inserted between the strands and a break portion that is disposed between the head and the screw thread portion and breaks when a predetermined torque is applied to the bolt. According to claim 11,
The cable connector of claim 1, further comprising a stopper disposed between the threaded portion and the break portion and suppressing insertion of the bolt to increase torque applied to the bolt. According to claim 11,
The cable connector according to claim 1 , wherein the protruding portion has a shape inclined in whole or in part so that the cross-sectional area gradually decreases. According to claim 11,
The cable connector according to claim 1 , wherein, when an end of the protrusion comes into contact with a central element wire of the section constituting the divided and compressed circular conductor, the break portion is broken. According to claim 11,
Characterized in that the predetermined torque is 50 to 150 N m, cable connector. According to claim 10,
The bolt is made of copper or brass or aluminum alloy having a tensile strength of 250 MPa or more and an electrical conductivity of 25% (@ 20 ° C) compared to pure copper, cable connector. According to claim 12,
The cable connector according to claim 1 , wherein at least the threaded portion, the protruding portion, and the stopper of the bolt are plated with tin.

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