JP2552794Y2 - Disconnector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a disconnector, and more particularly to a disconnector housed in a closed switchboard or the like for receiving high voltage power.

[Conventional technology]

Conventionally, there has been a disconnector of this type as shown in FIG. That is, the two support insulators 42, 4 attached to the underframe 41
The clip-side contact 44 and the connection terminal 43 are attached to one of the two, and the hinge-side contact 45 and the connection terminal 43, which are rotatably supported on one end of the blade 46 on the support shaft S, are attached to the other side. The other end of the blade 46 is formed so as to be detachably sandwiched between the clip-side contactors 44. A bus bar or a cable is connected to the connection terminals 43, 43, and the blade 46 is rotated about a support shaft S with a hook rod or the like to open / close the disconnector. Also, due to the installation location of this disconnector or the wiring of a cable or the like, so-called back-side connection in which one or both of the connection terminals 43 and 43 are located on the back side of the underframe 41 instead of the above-described surface connection method. In the case of using the system, as shown by a two-dot chain line in the underframe 41,
The support insulators 42b ₁ and 42b ₂ were attached. Also, three (or two) of these disconnectors are juxtaposed at a desired position in the closed switchboard, and the other ends of the blades 46, 46,... Are connected by a three- (or two-) operating rod (not shown) made of insulating material. Thus, a three-pole (or two-pole) disconnector was configured. The blades 46, 46,... Are simultaneously rotated via the operation rod to open and close the three-pole (or two-pole) disconnector.

[Problems to be solved by the invention]

However, in the disconnector as described above, since the opening and closing operation is performed by rotating the blade 46,
Since the turning range of 46 is large and the charged part is exposed, a space including an insulating distance is necessary for the turning range, and when used as a 3-pole (or 2-pole) disconnector, It is necessary to secure the insulation distance between the poles by increasing the distance between the poles and installing an insulating partition between the poles.
There has been a problem that the disconnector becomes larger, and it is difficult to house and dispose the disconnector in a box of a closed switchboard which is intended to be downsized. In addition, since the lead-out position of the connection terminal 43 is fixed, a bus bar or a cable or the like must be connected in a narrow space, which restricts the degree of freedom of wiring and requires much labor for wiring work. Had.

An object of the present invention is to solve the above-described problems, to provide a space that requires less space for opening and closing operations, can be compactly stored in a closed switchboard case, and can be easily wired. Is to do.

[Means for Solving the Problems] An opening / closing means is housed and installed in an insulating cylinder formed by dividing a cylindrical body made of an insulating material into two in the axial direction, and the opening / closing means is arranged concentrically with the insulating cylinder. A fixed contact and a movable contact mounted on a current-carrying rod are formed so as to be able to contact and separate by moving the current-carrying rod along the axial direction of the insulating cylinder,
The fixed contact and the movable contact are mounted on a terminal mounting seat provided on one side of the insulating cylinder, and the first fixed contact and the fixed contact are fixed to the terminal mounting seat.
Is electrically connected to a second connection terminal through which a current-carrying rod is inserted, and the current-carrying rod is connected to a terminal mounting seat provided on the other side of the insulating cylinder and connected via a flexible conductor. The first and second connection terminals, which are connectable and detachable and individually connected to the fixed contact and the movable contact, respectively, are respectively connected to the outside of the insulating cylinder through terminal insertion openings opened inside both ends in the axial direction of the insulating cylinder. In any direction.

[Action]

The connection terminals of the fixed contact side and the movable contact side are mounted on the terminal mounting seats provided on the inner periphery of the terminal insertion opening at the both ends of the insulating tube so that the tip ends in a desired projecting direction, and The fixed contact and the movable contact respectively connected to the connection terminal are opened and closed by moving the current-carrying rod on which the movable contact is mounted in the axial direction of the insulating cylinder.

〔Example〕

An embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view of the disconnector 1, and FIG. 2 is AA of FIG.
3 is a front view of the disconnector 1 shown in section, and FIG. 3 is a side view of the disconnector 1 as seen from the direction of arrow B in FIG. In FIG. 1 to FIG. 3, reference numeral 2 denotes an insulating cylinder formed of a cylindrical body using an electrically insulating material such as an epoxy resin. The insulating cylinder 2 is formed by dividing a cylinder into two along a plane passing through the axis thereof (hereinafter, referred to as a dividing surface), and forming a band-shaped member outside the divided portion of the divided two half cylinders 2a and 2b so as to face each other. The flanges 3, 3 and 4, 4 are integrally formed along the axial direction, a plurality of bolt insertion holes are provided in the flanges 3, 4, and bolts, nuts, etc. made of, for example, an electrically insulating material are provided in the bolt insertion holes. Insert and tighten 5 and flange 3,
4, the two semi-cylinders 2a and 2b are formed into a cylindrical body. A concave groove is provided on the joint surface of the flanges 3 and 4 on one side, and a convex line corresponding to the concave groove is provided on the other side in the axial direction, and the two half cylinders 2a and 2b are positioned and fastened to each other at the time of joining. It is formed so that it can be attached and fixed. Both ends of the insulating cylinder 2 in the axial direction are narrow in the circumferential direction (ie,
The terminal insertion openings 6, 6 extending in the direction perpendicular to the axis of the insulating cylinder) are opened, for example, such that they are symmetrical with respect to the above-mentioned division plane and have a C-shape when viewed from the arrow B direction in FIG. It is provided in. On the inner periphery of the peripheral opening edge of the terminal insertion ports 6, 6,
Flange-shaped terminal mounting seats 7 are provided around the insulating cylinder 2 integrally. As shown in FIG. 3, the terminal mounting seats 7, 7
In the circumferential direction, for example, screw holes 8, 8,... Each formed of an embedded nut or the like are provided at every 45 degrees on the basis of the division surface, and the terminal mounting seats 7, 7 are divided in the vicinity of the division surface. The two half cylinders 2a and 2b are formed integrally with each other. At the substantially middle position between the two terminal insertion ports 6, 6 of the insulating tube 2, slit holes 9, 9 extending in parallel with the circumferential direction at a predetermined interval are provided through the insulating tube 2, and both slits 9, 9 are provided. An insertion hole 10 is formed in the center between the slit holes 9, 9. Both terminal insertion holes
Two support pieces 11, 11 symmetrical with respect to the division plane are provided between the semi-cylindrical members 2a, 2b, respectively, between the semi-cylindrical members 2a, 2b. The support piece 11 is provided with two mounting holes 11a, 11a. 12, 13 are strip-shaped connection terminals made of a conductive material such as a copper alloy and slightly thinner than the width of the terminal insertion port 6, and a connection hole 14 for connecting a bus bar, a cable or the like is provided at the tip of the connection terminal. The base has screw holes in a positional relationship facing each other in the diameter direction of the terminal mounting seat 7.
Two mounting holes 15 and 15 are provided at the same intervals as 8 and 8, respectively, and the connection terminals 12 and 13 are inserted into the terminal insertion holes 6 and 6, and the screw holes 8 and 15 are inserted into the mounting holes 15 and 15 with bolts. , 8 so that the distal end provided with the connection hole 14 projects from the insulating cylinder 2. At this time, the terminal mounting seat 7 is provided with screw holes 8, 8,..., For example, at every 45 degrees, and the terminal insertion port 6 extends in the circumferential direction and is opened. 13 is selectively arranged in one of the five directions indicated by the two-dot chain line and the solid line in FIG. 3 and screwed to the terminal mounting seat 7. A guide hole 16 in which an energizing rod 18 is slidably provided concentrically with the insulating cylinder 2 is provided between the mounting holes 15 and 15 of the connection terminal 12. A fixed contact 17 made of a conductive material such as a columnar copper alloy fixed to the connection terminal 12 via a bolt in a hole formed concentrically with the insulating cylinder 2 is provided. The current-carrying rod 18 is made of a conductive metal rod such as a copper alloy, and a plurality of contact pieces divided in the axial direction are gathered in a cylindrical shape in a concave groove 18a provided around the distal end thereof. Spring bands 19a, 19a are respectively fitted in recesses provided on the outer periphery of both ends so as to be radially expandable and contractable, and one end is detachably fitted to the fixed contact 17 by the elastic force of the spring band 19a. The movable contact 19 is attached by fitting a convex ridge on the inner peripheral portion at the other end of the movable contact 19, and a mounting hole is provided at one end in the center of the current-carrying rod 18 so as to be provided together with the connection terminal 12. Flexible conductor fixed to the terminal mounting seat 7 with bolts and connected to the connection terminal 12 at the same time
The other end of the connecting rod 20 is connected, for example, by brazing, and a male screw is provided at the rear end of the current-carrying rod 18.
Reference numeral 21 denotes a guide made of an insulating material such as plastic. As shown in FIG. 4, the bent pieces 21b and 21b are formed through slits 21b of the insulating cylinder 2 through a joint plate 21a having a hole 21c at the center for fixing the guide 21. The bent pieces 21b, 21b are bent and formed in the same direction at the same interval as 9, 9 so as to face each other, and the bent pieces 21b, 21b are slit holes 9, 9, respectively.
The energizing rod 18 is formed so as to be concentric with the insulating cylinder 2 when the bent pieces 21b, 21b are inserted into the slit holes 9, 9 at the center of the bent pieces 21b, 21b. It is provided with through holes 21d, 21d movably supported. The rear end of the power supply rod 18 is connected to a handle (not shown) via an insulating rod 22 made of porcelain or the like having female threads at both ends.
To move in the axial direction.

Next, the operation of the disconnector 1 will be described. First, a flexible conductor 20 is brazed to the center of the current-carrying rod 18, and the current-carrying rod 18 is passed through the guide hole 16 of the connection terminal 12 from the screw side at the rear end. Combine. Next, the bent pieces 21b, 21b of the guide 21 are inserted into the slit holes of the half cylinder 2a.
9, and the guide 21 is fixed to the insertion opening 10 through a hole 21c via a bolt and a nut.
After the distal end of the energizing rod 18 is inserted through 21d, the movable contact 19 is attached to the concave groove 18a at this distal end. The distal end of the connection terminal 12 is projected through the terminal insertion port 6 at a position where wiring connection of a cable or the like inside the closed switchboard becomes easy, and the connection terminal 12 is screwed together with the flexible conductor 20 into the screw hole 8 of the terminal mounting seat 7. Tighten the screws. Similarly, the connection terminal to which the fixed contact 17 is fixed
The screw 13 is tightened with the fixed contact 17 facing the movable contact 19. Next, a bent piece of the guide 21 fixed to the half cylinder 2a
21b, 21b are inserted into the slit holes 9, 9 on the half cylinder 2b side, and the concave grooves of the flanges 3, 4 of both half cylinders 2a, 2b are aligned with the ridges, and bolts are inserted into the bolt insertion holes of the flanges 3, 4.・ Insert and tighten the fixtures 5 such as nuts. Further, a bolt is inserted into the other mounting hole 15 of the connection terminals 12 and 13 and screwed to the terminal mounting seat 7. Then, the support pieces 11, 11 of the insulating cylinder 2 are fastened and fixed to the frame of the closed switchboard by bolts and nuts inserted into the mounting holes 11a, and the other end of the insulating rod 22 is connected to a handle for opening and closing operation. Finally, a terminal such as a cable is attached to the connection holes 14 and 14 of the connection terminals 12 and 13 with bolts and nuts and connected. When this disconnector 1 is applied to a three-phase circuit, two more disconnectors 1 are attached in the same manner as described above. This completes the installation of the disconnector 1 to the closed switchboard. In the opening / closing operation of the disconnector 1, the operation of a handle for opening / closing operation (not shown) causes the energizing rod 18 to move along the guide hole 16 of the connection terminal 12 and the through holes 21 d, 21 d of the guide 21 so that the shaft of the insulating cylinder 2 is moved. To move the movable contact 19 to the fixed contact 17. As a result, the disconnector 1 is brought into a closed state (the position indicated by a two-dot chain line in FIG. 2), and the connecting terminal 12 is connected to the flexible conductor 20 and the conducting rod.
A current path to the connection terminal 13 via the movable contact 19, the movable contact 19, and the fixed contact 17 is formed. When the disconnector 1 is opened, the movable contact 19 is removed from the fixed contact 17 by moving the energizing rod 18 in the opposite direction to that described above.

FIG. 5 shows another embodiment of the present invention.
102 is formed by arranging three cylindrical bodies in parallel and on one plane so as to be integrally arranged side by side, and for each cylindrical body, as described above, a terminal insertion port and a terminal mounting seat. , Connection terminal, fixed
A three-pole disconnector is provided with a movable double contact, an energizing rod and the like. In this case, the insulating cylinder 102 is divided into two parts by a plane including the axis of the three cylindrical bodies (hereinafter, referred to as a dividing plane), and each of them is integrally formed. Grooves and ridges are provided, and flanges 103 and 104 are provided on both end faces in the direction parallel to the axis of the cylindrical body, respectively.
Fixing tools such as bolts and nuts are inserted into the bolt insertion holes 03 and 104 and tightened to form the insulating cylinder 102. Further, the terminal insertion opening 106a of the central tubular body among the three tubular bodies is formed so that the connection terminal can be inserted only in a direction perpendicular to the dividing plane. Further, the supporting piece 107 is provided with flanges 103, 104 provided on the both end surfaces.
Are provided at two locations. The same conducting rod as described above provided for each of the three cylindrical bodies is formed by forming a male screw provided at the rear end thereof into, for example, a right-hand thread, and connecting rods 108, 10
The male screw provided at one end of 8,108 is formed into a left-hand thread, and is connected to each other via three insulating rods made of porcelain or the like provided with right-hand and left-hand female threads at both ends.
At this time, the insulating rod can be rotated in one direction so that the rear end of the current-carrying rod and one end of the connection rod 108 can be simultaneously screwed and connected. The other ends of the connecting rods 108, 108, 108 are connected to connecting rods 109 which support wheels 110, 110 moving on link guides 111, 111 fixed to the frame or the like of the closed switchboard with bolts and nuts at both ends. Then, one end of a link 113a is attached via a pin joint to a link attachment seat 112 provided at the center of the connecting rod 109, and the other end of the link 113a is fixed to a frame or the like of a closed switchboard with bolts and nuts. Link 113b having one end fixed to the rotor shaft of motor 114
The other end of the motor 114 is connected via a pin joint, the motor 114 is connected to a control device (not shown), and the signal from the control device causes the motor 114 to rotate forward or backward by a predetermined angle from a predetermined position, The three current-carrying rods are moved in the axial direction of the insulating cylinder 102 to open and close three poles simultaneously.

In the embodiment of the three-pole disconnector described above, the insulating cylinder 102 has been described such that the three cylindrical bodies are arranged in parallel and on one plane. However, the present invention is not limited to this. For example, FIG. As shown in the figure, an insulating cylinder may be formed by integrally forming three cylindrical bodies in parallel so that their outer peripheries are in contact with or close to each other. In this case as well, a terminal insertion port is provided for each cylindrical body. , Terminal mounting seats, connection terminals, fixed / movable contactors, energizing rods, etc. The opening and closing operations of these are performed by connecting the three energizing rods to the connecting rods and links as in the case of the three-pole disconnector described above. It is connected to a motor via a mechanism, and the motor is rotated by a certain angle in forward and reverse directions.

In the operation of the three-pole disconnector configured as described above, even if the opening operation is mistakenly performed during the passage of the load current and an arc is generated between the fixed and movable contacts, the three-pole disconnector is Since both fixed and movable contacts are accommodated in the cylindrical body for each pole, charged particles generated by the arc discharge are isolated in each cylindrical body and do not develop into a short circuit between the poles.

In the above embodiment, the connection terminal 12 and the current-carrying rod 18 are described as being connected by the flexible conductor 20, but instead of the flexible conductor 20, an insulating portion is provided around the end surface of the guide hole 16 of the connection terminal 12. A contact consisting of a plurality of contact pieces having elasticity in the axial direction of the cylinder is attached, and is always in contact with the energizing rod 18 (in this case, a sliding contact) to maintain energization.
In addition, the energizing rod 18 may be supported concentrically with the fixed contact 17.

Further, in the above-described embodiment, the axial ends of the insulating cylinders 2 and 102 have been described as being open.
A plate material of the same material as 102 may be closed and attached by bonding or the like. In this case, it is possible to prevent foreign matter from entering the inside of the insulating tube 2, and it is possible to prevent
Reliability can be further improved.

Furthermore, in the above embodiment, the slit holes 9
The U-shaped guide 21 inserted in the above has been described as a mere guide for the energizing rod 18 to move smoothly in the axial direction, but as shown in FIG. In order to measure the load current flowing through the cables and the like connected to the connection terminals 12 and 13 between the pieces 21b and 21b, a current-carrying rod that penetrates a centrally formed through-type current transformer CT that is integrally molded. 18 with sufficient insulation between the current transformer CT and the winding terminal of the current transformer CT.
May be drawn out through a lead wire to effectively use the space in the insulating cylinder 2 so that the closed switchboard is formed more compactly.

Furthermore, in the above-described embodiment, the insulating cylinder 2 is described as having a cylindrical shape. However, the present invention is not limited to this.

In the above embodiment, the insulating cylinder 2 is divided into two half cylinders.
Although it has been described that the 2a and 2b are integrally connected, the insulating cylinder may be integrally formed without being divided.

[Effects of the Invention] As described above, according to the present invention, a cylindrical insulating body is formed by dividing it into two parts, and fixed and movable contactors are provided therein. Since the contact and separation are performed by moving the current-carrying rod having the movable contact attached to one end in the axial direction of the insulating cylinder, the space required for the opening and closing operation can be extremely reduced. In addition, since the insulating cylinder is formed in two parts, maintenance and inspection and replacement of both contacts are easy, and as a result, the disconnector can be manufactured compactly and easily housed and arranged in a narrow space of a closed switchboard. It has become possible to manufacture closed switchboards compactly and economically. Further, the projecting position of the projecting terminal of the connecting terminal for connecting an external cable or the like is set in a direction most suitable for wiring work of the cable or the like by a terminal insertion port and a terminal mounting seat opened in a C shape in a circumferential direction of the insulating cylinder. The wiring work can be performed quickly and easily, and the number of work steps can be reduced.

[Brief description of the drawings]

1 is a perspective view of a disconnector showing an embodiment of the present invention, FIG. 2 is a sectional front view of the disconnector of FIG. 1, FIG. 3 is a side view of the disconnector of FIG. 1, and FIG. FIG. 1 is a perspective view of a guide, FIGS. 5 and 6 are perspective views showing another embodiment of the present invention, and FIG. 7 is a view showing a conventional disconnector. 1; disconnector, 2,102; insulating tube 8; terminal insertion port, 7; terminal mounting seat 12, 13; connection terminal, 17; fixed contact 18; energizing rod, 19; movable contact

Claims (1)

(57) [Scope of request for utility model registration] An opening / closing means is accommodated in an insulating cylinder formed by dividing a cylindrical body made of an insulating material in an axial direction thereof, and said opening / closing means is provided with a fixed contact arranged concentrically with the insulating cylinder. The movable contact attached to the current-carrying rod is formed so as to be able to contact and separate by moving the current-carrying rod along the axial direction of the insulating cylinder, and the fixed contact and the movable contact are connected to one of the insulating cylinders. A first connection terminal attached to the provided terminal attachment seat and fixing the fixed contact, and a current-carrying rod inserted therethrough; and
The current-carrying rod is electrically connected to and detachable from a second connection terminal attached to a terminal attachment seat provided on the other side of the insulating cylinder and connected via a flexible conductor. The first and second connection terminals individually connected to the contact are made to protrude in arbitrary directions outside the insulating cylinder from terminal insertion openings opened inside both ends in the axial direction of the insulating cylinder. Disconnector.