CN114496663B - Operating rod - Google Patents

Abstract

The invention provides a novel operating rod capable of reliably dismounting a fuse tube. The operating rod is used for disassembling and assembling the fuse tube used in the high-voltage disconnector. The operation rod is provided with: an operating rod main body; a cylindrical housing member fixed to the distal end of the operating rod main body and capable of housing an end portion of the fuse tube; a support member that surrounds the outer periphery of the housing member and is attached to the outer periphery of the operation rod main body in a loosely fitted state; and a plurality of spring members which are disposed between the accommodating member and the support member, are loosely fitted to the accommodating member, and have one end portion projecting from the tip of the accommodating member in the axial direction in which the axis of the accommodating member extends. Further, a claw portion is provided on one end portion of the spring member so as to project toward the axial line side of the housing member, and the claw portion engages with a flange portion provided on an outer peripheral surface of the fuse cylinder when the fuse cylinder is attached to and detached from the high-voltage disconnector.

Description

Operating rod

Technical Field

The present specification discloses an operating rod for attaching and detaching a fuse tube used in a high-voltage disconnector.

Background

A high-voltage disconnector (cut out) in which a fuse tube is housed in a porcelain insulator is used for protecting a transformer and the like. When opening and closing the distribution line or replacing the fuse tube, the operator attaches and detaches the fuse tube using the operation rod in order to ensure safety and ease of operation. Patent document 1 discloses an operating rod including an elastic plate engageable with a fuse tube. The operating rod of patent document 1 has a claw portion at the tip of an elastic plate. When the fuse tube is attached to the high-voltage breaker, the operating rod is pressed against the fuse tube, the claw portion is engaged with the flange portion provided in the fuse tube, and the fuse tube is inserted into the high-voltage breaker in a state where the fuse tube is fixed to the operating rod. When the operating rod is pressed against the fuse tube after the fuse tube is attached to a predetermined position of the high-voltage breaker, the elastic plate is deformed (outwardly opened), and the engagement between the claw portion and the flange portion is released (the operating rod is separated from the fuse tube). When the fuse tube is detached from the high-voltage breaker, the operating rod is pressed against the fuse tube, the claw portion is engaged with the fuse tube, and the fuse tube is pulled out from the high-voltage breaker in a state where the fuse tube is fixed to the operating rod.

Documents of the prior art

Patent document

Patent document 1: japanese Kokoku publication Sho 35-17063

Disclosure of Invention

As described above, with the operating rod of patent document 1, the fuse tube is pressed against the operating rod (or the operating rod is pressed against the fuse tube) to fix the fuse tube and the operating rod. In addition, when the fuse tube is separated from the operating rod after the fuse tube is inserted into the high-voltage breaker, the operating rod is also pressed against the fuse tube. When the fuse tube is detached from the high-voltage breaker by the operating rod of patent document 1, if the operating rod is strongly pressed against the fuse tube, the following phenomenon occurs: the claw portion (elastic plate) is not engaged with the flange portion of the fuse tube, and the fuse tube cannot be detached from the high-voltage breaker. More specifically, when the operating rod is strongly pressed against the fuse tube, the following phenomenon occurs after the claw portion and the flange portion are temporarily engaged: the elastic plate is deformed (expanded outward) to release the engagement between the claw portion and the flange portion. In this case, the deformed elastic plate needs to be restored to its original shape and the fuse tube needs to be removed again, which deteriorates the work efficiency. There is a need for an operating rod that can more reliably secure and release a fuse cartridge. An object of the present specification is to provide a novel operation rod capable of reliably attaching and detaching a fuse tube.

The operating rod disclosed in the present specification is used for attaching and detaching a fuse tube used in a high-voltage breaker, and may include: an operating rod main body; a cylindrical housing member fixed to the distal end of the operating rod main body and capable of housing an end portion of the fuse tube; a support member that surrounds the outer periphery of the housing member and is attached to the outer periphery of the operation rod main body in a loosely fitted state; and a spring member disposed between the receiving member and the support member, and configured to be loosely fitted to the receiving member, one end of the spring member protruding from a tip of the receiving member in an axial direction in which an axis of the receiving member extends, and the other end of the spring member protruding toward the axial side of the receiving member, and provided with a claw portion that engages with a flange portion provided on an outer peripheral surface of the fuse tube when the fuse tube is attached to and detached from the high-voltage breaker.

Drawings

Fig. 1 shows a cross-sectional view of a high-pressure disconnector.

Fig. 2 shows a partial cross-sectional view of the operation rod of embodiment 1.

Fig. 3 shows a cross-sectional view of the spring member.

Fig. 4 is a perspective view of a support member according to embodiment 1.

Fig. 5 is a perspective view of the accommodating member.

Fig. 6 is a perspective view for explaining a state in which the operation rod is attached to the fuse tube.

Fig. 7 shows a partial cross-sectional view of the operating rod of embodiment 2.

Fig. 8 is a perspective view of the cylinder of embodiment 2.

Fig. 9 is a perspective view of a support member according to embodiment 2.

Description of the reference numerals

12 … fuse cartridge; 26 … flange portion; 42 … projection; 70 … operating rod; 72 … receives the axis of the part; 74 … operating rod body; 82 … protective component; 84 … support members; 84a … reduced diameter portion; 84b … inclined portion; 84c … groove; 85 … cylinder; 86 … houses components; 86a … engaging portion; a 90 … spring member; 90c … jaw; 100 … high pressure cutter.

Detailed Description

(high pressure cutter)

The high-voltage breaker is connected between the distribution line and equipment such as a transformer via an external electric wire. The high-pressure cutter is provided with: a cylindrical main insulator made of porcelain; and a fuse tube housed in the body insulator. High-pressure cutters are sometimes also referred to as cylindrical cutters. The fuse canister is removable from the high-voltage disconnector. When the fuse holder is inserted into the main body insulator, the distribution line is connected to a device such as a transformer (the distribution line is closed). When the fuse tube is detached from the main body insulator (the distribution line is disconnected), or an excessive current (a current exceeding a predetermined value) flows through the high-voltage breaker (the fuse tube) to fuse the fuse element in the fuse tube, the distribution line between the distribution line and the device is cut. When the fuse element is blown, the distribution line can be connected to the device again by replacing the fuse canister.

(operating rod)

The operation rod is used for detaching and attaching the fuse tube to and from the high-voltage disconnector. The operation rod may include: an operating rod main body; a cylindrical housing member fixed to the distal end of the operation rod main body; a support member surrounding an outer periphery of the housing member; and a spring member disposed between the accommodating member and the support member. In the following description, the side of the fuse tube that is located on the side of the fuse tube when the fuse tube is removed is referred to as the tip side (in the axial direction), and the side that is located away from the fuse tube is referred to as the base side.

The housing member is capable of housing an end portion of the fuse tube when the fuse tube is attached to and detached from the high-voltage breaker. The housing member may be cylindrical. Further, an engaging portion protruding toward the axis (central axis) of the housing member may be provided on the inner peripheral surface of the housing member on the distal end side. The engaging portion may be formed to extend in a circumferential direction of the housing member and formed at a part of the circumferential direction of the housing member. That is, the inner peripheral surface of the housing member may be provided with a portion where the engaging portion is formed and a portion where the engaging portion is not formed. The plurality of engaging portions may be provided on an inner peripheral surface of the accommodating member. When a plurality of engaging portions are provided on the inner peripheral surface of the housing member, the engaging portions may be arranged at equal intervals in the circumferential direction of the housing member. In the case where 2 engaging portions are provided in the housing member, the 2 engaging portions may be provided at positions symmetrical with respect to the axis of the housing member.

The engaging portion engages with a protruding portion provided on an outer peripheral surface of the fuse cylinder when the fuse cylinder is detached from the high-voltage disconnector. More specifically, when the fuse tube is detached from the high-voltage breaker, first, the housing member is inserted into the end portion of the fuse tube so that the protruding portion of the fuse tube passes through a portion of the housing member where the engaging portion is not provided. Next, the operation rod is rotated so that the engagement portion and the protrusion portion face each other in the axial direction. By making the engaging portion face the projecting portion, the projecting portion engages with the engaging portion when the fuse tube is pulled, whereby the fuse tube can be reliably held in the housing member. When the fuse tube is detached from the high-voltage breaker, the fuse tube can be prevented from being separated from the operating rod, and the fuse tube can be safely detached from the high-voltage breaker.

The support member may be attached to the outer periphery of the operation rod main body in a loosely fitted state so as to surround the outer periphery of the housing member. Further, when the housing member is fixed to the operation rod main body, the support member is also loosely fitted to the housing member. The support member may be provided with a reduced diameter portion having an inner diameter smaller than that of the other portion at the end portion on the base side. Further, the fixing member may be fixed to the operation rod main body on the base portion side of the accommodating member. The fixing member may be fixed to the operation rod main body so that a gap is provided between an axial front end side end of the fixing member and an axial base end of the receiving member in the axial direction. The support member may be attached to the operation rod main body such that the reduced diameter portion of the support member is positioned in the gap between the fixing member and the receiving member. In this case, the gap between the fixing member and the accommodating member may be larger than the thickness (length in the axial direction) of the reduced diameter portion by 0.2mm to 1mm. Thereby, the support member can move in the axial direction with respect to the operation rod main body and the housing member. Further, the inner diameter of the reduced diameter portion may be larger than the outer diameter of the operation rod main body. As described above, the support member is not fixed to the accommodating member but is loosely fitted, and is attached to the operation rod main body so as to surround the outer periphery of the accommodating member. Therefore, the support member can rotate relative to the operation rod main body and the housing member. Can be regarded as: the support member is attached to the operation rod main body in a state of being movable in the axial direction and rotatable with respect to the operation rod main body and the housing member.

The inner peripheral surface of the support member may be provided with a plurality of groove portions extending in the axial direction. The groove portion may accommodate a part of the spring member. More specifically, the groove portion may accommodate a portion of the spring member from the base side end to the intermediate portion in the axial direction. In other words, the portion of the spring member from the base side end to the intermediate portion in the axial direction is fitted in the groove portion of the support member. The portion of the spring member from the front end side end to the middle portion is not received (fitted) in the groove portion. As described above, the spring member is disposed between the accommodating member and the support member. The groove portion is formed in the inner peripheral surface of the support member, and the spring member is accommodated in the groove portion, so that the gap between the accommodating member and the support member can be reduced. Further, the portion of the spring member that is housed (fitted) in the groove portion of the support member is restricted from deforming in the radial direction (direction orthogonal to the axial direction) by the support member. That is, only the portion of the spring member that is not housed in the groove portion of the support member functions as a "spring".

Further, the inner peripheral surface on the distal end side of the support member may be provided with a slope portion whose inner diameter increases toward the end portion in the axial direction (distal end side end portion). Specifically, the inclined portion may be provided closer to the distal end side of the support member than the position where the groove portion is provided. The inclined portion and the groove portion may be continuous. By providing the inclined portion, the spring member can be deformed in the radial direction when a force in the radial direction is applied to the spring member. That is, when the groove portion and the inclined portion are provided in the support member, a portion of the spring member on the tip side from a position facing the base side end of the inclined portion (tip side end of the groove portion) functions as a "spring".

The spring member may be disposed between the accommodating member and the support member in a state of being loosely fitted in the accommodating member and the operation rod main body. As described above, the support member is rotatable with respect to the operation rod main body and the housing member. Therefore, when a part of the spring member is accommodated in the groove portion of the support member, the spring member can also rotate with respect to the operation rod main body and the accommodating member. Further, a claw portion protruding toward the axial direction of the housing member is provided on the tip end side (one end portion) of the spring member. When the fuse tube is attached to and detached from the high-voltage breaker, the claw portion engages with a flange portion provided on an outer peripheral surface of the fuse tube. When the fuse cylinder is attached to and detached from the high-voltage breaker, the flange portion of the fuse cylinder is supported by the claw portion, and the fuse cylinder can be fixed to the operating rod (housing member). Further, the claw portion (one end portion of the spring member) may protrude from the tip of the housing member in the axial direction. Further, a restricting portion that bends toward the axial line side may be provided at a base side end of the spring member (the other end of the spring member). By providing the restricting portion, the restricting portion comes into contact with the base-side end surface of the housing member, and the movement of the spring member in the axial direction can be restricted. In other words, the spring member can be prevented from falling out from between the housing member and the support member by providing the restriction portion.

[ examples ] A

(high pressure cutter)

Referring to fig. 1, a high-pressure breaker 100 will be described. The high-voltage disconnector 100 is provided on a distribution line and protects equipment such as a transformer. The high-pressure breaker 100 includes: a porcelain body insulator 8; a 1 st electrode 56 connected to the power distribution line side; an arc-extinguishing rod 54 disposed inside the 1 st electrode 56; a 2 nd electrode 46 connected to the device side; and a fuse canister 12 connecting the 1 st electrode 56 with the 2 nd electrode 46. The main insulator 8 is cylindrical, and has a plurality of insulating sheds 14 on the outer circumferential surface. A cylindrical 1 st chamber 4 and a cylindrical 2 nd chamber 20 having a larger diameter than the 1 st chamber 4 are formed in the main body insulator 8. A cylindrical arc-extinguishing cylinder 6 is disposed in the 1 st chamber 4. The fuse tube 12 is disposed inside the arc tube 6. The high-pressure disconnector 100 is arranged: in the direction of gravity, the 1 st chamber 4 is on the upper side and the 2 nd chamber 20 is on the lower side. The 1 st electrode 56 is disposed in the 1 st chamber 4, and the 2 nd electrode 46 is disposed in the 2 nd chamber 20. Hereinafter, the 1 st electrode 56 side may be referred to as "upper portion", "upper side", and the like, and the 2 nd electrode 46 side may be referred to as "lower portion", "lower side", and the like, in the direction in which the fuse tube 12 extends (i.e., the direction of gravity). In addition, the 1 st electrode 56 can be considered as the upper electrode of the high-voltage disconnector 100, and the 2 nd electrode 46 can be considered as the lower electrode of the high-voltage disconnector 100.

A conical upper shell 2 is fixed to the upper portion of the main body insulator 8 with an adhesive. And the outgoing line of the upper die cone 2 is connected with the distribution line. A conical lower shell 28 is fixed to the lower side wall 24 of the main insulator 8 with an adhesive. The lead-out wire of the lower die cone 28 is connected with equipment such as a transformer.

The fuse canister 12 extends from the 1 st chamber 4 through the 2 nd chamber 20 and connects the 1 st electrode 56 with the 2 nd electrode 46. The fuse tube 12 includes: an insulating tube 50 for housing the fuse 10; an upper contact 52 provided on the upper portion of the insulating cylinder 50; a lower contact 48 provided at a lower portion of the insulating cylinder 50; and a display cylinder 58 disposed further below the lower contact member 48. The upper contact 52 is connected to the 1 st electrode 56 and the lower contact 48 is connected to the 2 nd electrode 46. A buffer member 18 is disposed between the lower contact 48 and the upper surface of the 2 nd chamber. The flange portion 26 and the protruding portion 42 are provided on the side surface of the fuse tube 12 below the lower contact 48. The flange portion 26 is substantially wound around the fuse tube 12 once, and 2 protruding portions 42 are provided at angular intervals of 180 degrees in the circumferential direction. In addition, the display cylinder 58 is fixed to the insulating cylinder 50. On the other hand, the lower contact 48 is vertically displaceable with respect to the insulating cylinder 50 and the display cylinder 58. The display canister 58 constitutes the lower end of the fuse canister 12.

The fuse 10 includes: a fuse element 16 disposed in the insulating tube 50; and a fuse wire 40 connected to the fuse element 16. The fuse wire 40 is folded back upward from the lower end of the display cylinder 58 outside the display cylinder 58, and is screwed and fixed to a screw 60 attached to the lower contact 48. The spring 44 is disposed in a compressed state between the lower contact 48 and the display cylinder 58. Thus, a tensile force is applied to the fuse wire 40. In other words, the spring 44 is compressed by tightening and fixing the fuse wire 40 to the tightening screw 60.

An opening 38 is provided below the main insulator 8 (lower end of the 2 nd chamber 20). The opening 38 is closed by the cover member 34. The cover member 34 is fixed to the inner wall 30 of the 2 nd chamber 20 by an adhesive 36. The lid member 34 is a bottomed cylindrical shape, and includes: a shaft portion 34a; a flange portion 34b provided on the outer peripheral surface of the shaft portion 34a; and an opening/closing portion (bottom portion) 32 provided on the inner peripheral surface of the shaft portion 34 a. The flange portion 34b is provided at the vertically intermediate portion of the shaft portion 34a, protrudes radially outward, and surrounds the outer periphery of the shaft portion 34a by one turn. The opening/closing portion 32 is provided below the flange portion 34b and above the lower end of the shaft portion 34 a. Thus, the lower end of the shaft portion 34a constitutes: and a projection 34c projecting downward from the opening/closing portion 32. The opening/closing portion 32 is protected by the projection 34c. The lid member 34 (including the opening/closing portion 32) is formed of an elastic material such as rubber or soft synthetic resin. Further, a crush piece (not shown) such as an insulator is fixed to the inner wall 30, and a minute protrusion is formed. By forming minute protrusions on the inner wall 30, the cover member 34 can be firmly fixed to the inner wall 30.

The opening/closing portion 32 is provided with radial notches 32a. Therefore, the fuse tube 12 and the like can easily pass through the opening/closing portion 32. That is, when the fuse tube 12 or the like passes through the opening/closing portion 32, the opening/closing portion 32 is deformed to open the opening/closing portion 32, and after the fuse tube 12 or the like passes through, the original shape is restored to close the opening/closing portion 32. As described above, since the opening/closing portion 32 (the lid member 34) is formed of an elastic material, the opening/closing can be easily deformed (elastically deformed) by providing the notch 32a.

The lid member 34 is attached to the opening 38 of the 2 nd chamber 20 in a state where the adhesive 36 is applied to the inner wall 30. When the lid member 34 is attached, the shaft portion 34a is inserted into the 2 nd chamber 20 until the upper surface of the flange portion 34b comes into contact with the opening portion 38. Thereby, the lid member 34 is positioned with respect to the main insulator 8. When the cap member 34 is inserted into the 2 nd chamber 20, the gap between the outer peripheral surface of the shaft portion 34a and the inner wall 30 is filled with the adhesive 36, so that the cap member 34 is fixed to the body insulator 8. The opening 38 is closed by fixing the lid member 34 to the main insulator 8.

In the high-voltage breaker 100, when a current exceeding a predetermined value flows through a power distribution path in which the high-voltage breaker 100 is arranged, the fuse element 16 fuses. As a result, the spring 44 is stretched, the state in which the lower contact 48 is connected to the 2 nd electrode 46 is maintained, and the fuse tube 12 (other than the lower contact 48) moves downward. When the fuse tube 12 moves downward, the display tube 58 is exposed from the lid member 34 (opening/closing portion 32) to the lower portion of the high-voltage breaker 100. That is, whether the fuse element 16 is fused (whether the fuse tube 12 needs to be replaced) can be determined by checking whether the display tube 58 is exposed to the lower portion of the high-voltage breaker 100. In addition, even if the fuse element 16 is blown, the lower contact 48 is continuously connected (fixed) to the 2 nd electrode 46. Therefore, the fuse tube 12 (the display tube 58) is moved downward by the elastic force of the spring 44 and the gravity, but can be prevented from falling off the high-voltage breaker 100.

When the fuse element 16 is blown (the display cylinder 58 is exposed from the main insulator 8), the fuse cylinder 12 is pulled out from the main insulator 8 in order to replace the fuse cylinder 12. When the distribution line on which the high-voltage breaker 100 is disposed is broken (load-broken) by construction or the like, the operation rod 70 is inserted into the inside of the lid member 34 (inside the main insulator 8) from the bottom surface (opening/closing portion 32) of the lid member 34, and the fuse tube 12 is pulled out from the main insulator 8. In this case, when the fuse tube 12 is pulled out, an arc is generated between the upper contact 52 and the 1 st electrode 56. However, the arc extinguishing rod 54 and a part of the arc extinguishing cylinder 6 are melted by the arc heat to generate an arc extinguishing gas, and the arc is extinguished by the arc extinguishing gas. When the fuse tube 12 is inserted into the body insulator 8, the fuse tube 12 is inserted from the bottom surface of the lid member 34 toward the inside of the lid member 34. The operator uses the operating rod 70 when inserting the fuse tube 12 into the main insulator 8 and removing the fuse tube 12 from the main insulator 8 (attaching and detaching the fuse tube 12 to and from the high-voltage breaker 100). The operation rod 70 will be described below.

(operation Bar: embodiment 1)

Referring to fig. 2, the operation rod 70 will be described. As shown in fig. 2, the operating rod 70 is rod-shaped and extends along the axis 72 of the housing member 86. The operation rod 70 includes: an operating rod main body 74; and a detachable portion 80 provided at the tip (one end in the direction of the axis 72) of the operation rod main body 74. The operation rod main body 74 is cylindrical. The detachable unit 80 includes: a housing member 76 fixed to the operation rod main body 74; a support member 84 attached to the operation rod main body 74 in a loosely fitted state; a spring member 90 attached to the operation rod main body 74 in a loosely fitted state between the housing member 86 and the support member 84; a fixing member 76 fixed to the operation rod main body 74 at a position closer to the base side than the housing member 86; and a protection member 82 fixed to the fixing member. The housing member 86 is screwed and fixed to the operation rod main body 74. Specifically, a male screw (not shown) is provided on the outer peripheral surface of the operation rod main body 74, a female screw (not shown) is provided on the inner peripheral surface of the housing member 86, and the housing member 86 is fixed to the operation rod main body 74 by screwing the housing member 86 into the operation rod main body 74 while an adhesive is applied to the inner peripheral surface (portion where the female screw is provided) of the housing member 86. The details of the housing member 86 will be described later. The fixing member 76 is fixed to the operation rod main body 74 by a fixing screw 75. A gap is provided between the fixing member 76 and the housing member 86 in the axis 72 direction.

The support member 84 is cylindrical, and has a slope portion 84b provided on the distal end side thereof and a reduced diameter portion 84a having a smaller inner diameter than the other portions provided on the proximal end side thereof. The support member 84 is provided with a portion where the reduced diameter portion 84a is not provided, surrounding the outer periphery of the housing member 86. When the support member 84 is attached to the operation rod main body 74, the reduced diameter portion 84a side is inserted into the operation rod main body 74. The reduced diameter portion 84a surrounds the outer periphery of the operation rod main body 74 and is located between the fixing member 76 and the receiving member 86 in the axis 72 direction. The support member 84 is not fixed to the operating rod main body 74 and the housing member 86. Therefore, the support member 84 is movable in the direction of the axis 72 and rotatable with respect to the operation rod main body 74 and the housing member 86. However, since the reduced diameter portion 84 is located between the fixing member 76 and the receiving member 86, the reduced diameter portion 84a comes into contact with the fixing member 76 and the receiving member 86 when the support member 84 moves in the direction of the axis 72. Therefore, the support member 84 does not fall off from the operation rod main body 74. A spring member 90 is fixed (fitted) to the support member 84. The details of the support member 84 will be described later.

The protective member 82 is fixed to the fixing member 76. Specifically, a male screw (not shown) is provided on the outer peripheral surface of the fixing member 76, a female screw (not shown) is provided on the inner peripheral surface of the protective member 82, and the protective member 82 is fixed to the fixing member 76 by screwing the protective member 82 into the fixing member 76 while an adhesive is applied to the inner peripheral surface (portion where the female screw is provided) of the protective member 82. The protection member 82 surrounds the outer periphery of the support member 84, and protects the support member 84, the spring member 90, and the fixing member 76.

The spring member 90, the support member 84, and the housing member 86 will be described with reference to fig. 3 to 5. As shown in fig. 3, the spring member 90 includes: the straight portion 90b; a claw portion 90c provided on one end side (front end side) of the linear portion 90b; and a restricting portion 90a provided on the other end side (base portion side) of the linear portion 90b (see also fig. 2). The restricting portion 90a is bent by about 90 degrees with respect to the linear portion 90 b. The base portion side of the claw portion 90c is bent in the same direction as the restricting portion 90a with respect to the linear portion 90 b. More specifically, the base portion side of the claw portion 90c is inclined with respect to the linear portion 90 b. The tip side of the claw portion 90c is bent (inclined) in the opposite direction to the restricting portion 90a with respect to the linear portion 90 b. The inclination angle of the claw portion 90c (the base portion side and the tip end side) with respect to the linear portion 90b can be adjusted within a range of 100 degrees to 150 degrees. For example, the two inclination angles of the claw portion 90c with respect to the linear portion 90b are about 120 degrees. Further, the end portion 90e on the one end side of the claw portion 90c is bent 180 degrees.

As shown in fig. 4, the support member 84 has a plurality of grooves 84c on its inner circumferential surface extending in the direction of the axis 72 (see also fig. 2). The groove portion 84c extends from the intermediate portion to the base-side end portion of the support member 84 in the axis 72 direction. The width of the groove portion 84c (the length in the circumferential direction of the support member 84) is formed slightly larger than the width of the spring member 90. The groove depth (the length in the radial direction of the support member 84) of the groove portion 84c is formed to be slightly larger than the plate thickness of the spring member 90. The grooves 84c are provided at equal intervals in the circumferential direction of the support member 84. A part of the linear portion 90b of the spring member 90 is fitted into the groove portion 84c. That is, in the spring member 90, a part of the linear portion 90b is fixed to the groove portion 84c of the support member 84, and the claw portion 90c and a part of the linear portion 90b are movable with respect to the support member 84. Further, an inclined portion 84b having an inner diameter increasing toward the distal end in the direction of the axis 72 is provided on the inner peripheral surface of the support member 84. When the spring member 90 is attached (fitted) to the support member 84, the linear portion 90b also faces the inclined portion 84b (see also fig. 2). Even if the spring member 90 is biased, the portion (a part of the linear portion 90 b) of the spring member 90 that fits in the groove portion 84c does not deform. On the other hand, when the spring member 90 is biased, the portions of the spring member 90 that are not fitted in the groove portions 84c (a part of the linear portion 90b and the claw portions 80 c) are elastically deformed.

As shown in fig. 5, 2 engaging portions 86a are provided on the tip end side of the housing member 86. The engaging portion 86a protrudes toward the center side (the axis line 72 side: see also fig. 2) of the housing member 86. The 2 engaging portions 86a are provided at positions symmetrical with respect to the axis 72. The engaging portion 86a is formed by bending a part of the front end of the accommodating member 86 inward. A stopper 87 extending in the direction of the axis 72 is provided at one end of the engaging portion 86a. As shown in fig. 2, the linear portion 90b of the spring member 90 is in contact with the outer peripheral surface of the housing member 86 via the cylindrical body 85. Therefore, even if the spring member 90 is biased, the spring member 90 (the linear portion 90 b) is not deformed toward the axis 72. That is, the spring member 90 elastically deforms outward in the radial direction of the housing member 86, but does not deform inward in the radial direction of the housing member 86. The cylindrical body 85 is fitted (fixed) to the outer periphery of the housing member 86. Therefore, the cylindrical body 85 and the housing member 86 can be collectively regarded as 1 housing member. By providing the cylindrical body 85, the spring member 90 existing at a position facing the engagement portion 86a of the housing member 86 can be suppressed from being deformed inward in the radial direction of the housing member 86. That is, the contact area between the accommodating member 86 and each spring member 90 (actually, the contact area between the cylindrical body 85 and the spring member 90) is uniform in the circumferential direction of the accommodating member 86, and thus the specific spring member 90 (the spring member 90 facing the engagement portion 86 a) can be prevented from being deformed radially inward.

Returning to fig. 2, the features of the operating rod 70 will be further explained. The spring member 90 is attached to the support member 84 such that the tip of the regulating portion 90a (see also fig. 3) faces the axis 72 direction. As a result, the restriction portion 90a is positioned: between the reduced diameter portion 84a of the support member 84 and the base-side end surface 86e of the housing member 86, and between the reduced diameter portion 84a of the support member 84 and the base-side end surface 85a of the cylindrical body 85. The linear portion 90b of the spring member 90 is located between the inner surface of the support member 84 and the outer surface of the cylindrical body 85 (housing member). This can prevent the spring member 90 from falling off the operation rod main body 74. That is, even if a force is applied to the spring member 90 to move the spring member 90 in the direction of the axis 72, the restricting portion 90a comes into contact with the support member 84 (the reduced diameter portion 84 a), the accommodating member 86, or the cylindrical body 85, and therefore, the movement of the spring member 90 is restricted so that the spring member 90 does not fall off from the accommodating member 86 (the operation rod main body 74). Further, even if a force is applied to the spring member 90 to move the spring member in the radial direction (the direction orthogonal to the axis 72), the linear portion 90b of the spring member 90 contacts the inner surface of the support member 84 or the outer surface of the cylindrical body 85, and the restricting portion 90a contacts the housing member 86 and/or the cylindrical body 85, so that the spring member 90 does not fall off the housing member 86 (the operation rod main body 74).

Since the claw portion 90c is bent in the same direction as the restricting portion 90a with respect to the linear portion 90b, the tip of the claw portion 90c is positioned closer to the axial line 72 direction side than the inner peripheral surface of the housing member 86 when viewed from the axial line 72 direction. In other words, a circle (imaginary circle) formed by connecting the tips of the claw portions 90c is located inward of the inner peripheral surface of the housing member 86. The claw portion 90c does not protrude from the front end of the protection member 82, and the end portion 90e protrudes from the front end of the protection member 82. That is, in the radial direction of the detachable section 80, the claw section 90c is surrounded by the protective member 82, and the end section 90e is not surrounded by the protective member 82. Therefore, when the tip end side of the spring member 90 is deformed radially outward, the end portion 90e can be prevented from contacting the protective member 82, and a large amount of deformation of the spring member 90 can be ensured.

The linear portion 90b of the spring member 90 is accommodated in the groove portion 84c of the support member 84 on the base side (the restricting portion 90a side) and is not accommodated in the groove portion 84c on the tip side (the claw portion 90c side). The support member 84 is provided with a slope portion 84b, and a part of the tip end side of the linear portion 90b is surrounded by the slope portion 84b. Therefore, when the linear portion 90b of the spring member 90 is deformed (when the spring member 90 expands radially outward), the linear portion 90b can be smoothly deformed (the deformation of the linear portion 90b is not hindered by the support member 84). As described above, the support member 84 is rotatable with respect to the operation rod main body 74 and the housing member 86. Further, the spring member 90 is fixed (fitted) to the support member 84. Therefore, the spring member 90 is also rotatable with respect to the operation rod main body 74 and the housing member 86. In other words, the operation rod main body 74 and the housing member 86 can rotate relative to the support member 84 and the spring member 90.

A method of attaching and detaching the fuse tube 12 and the operation rod 70 will be described with reference to fig. 6. When attaching the fuse tube 12 to the high-voltage breaker 100, the worker first attaches the fuse tube 12 to the operation rod 70. Specifically, the lower end portion (the display cylinder 58 side) of the fuse cylinder 12 is press-fitted into the housing member 86, and the flange portion 26 of the fuse cylinder 12 is engaged with the claw portion 90c of the spring member 90. When the fuse tube 12 is pressed into the housing member 86, the flange portion 26 of the fuse tube 12 collides with the spring member 90 (claw portion 90 c) and the spring member 90 (straight portion 90 b) is elastically deformed outward in the radial direction. When the flange portion 26 passes over the top of the claw portion 90c, the spring member 90 returns to the shape before elastic deformation, and the claw portion 90c engages with the flange portion 26. When the fuse tube 12 is pressed into the housing member 86, the end portion of the fuse tube 12 is pressed into the housing member 86 so that the protruding portion 42 of the fuse tube 12 passes through the portion of the housing member 86 where the engaging portion 86a is not provided.

After the fuse tube 12 is attached to the operating rod 70, the worker inserts the fuse tube 12 into the body insulator 8, clamps the upper contact 52 to the 1 st electrode 56 to connect the upper contact 52 to the 1 st electrode 56, and clamps the lower contact 48 to the 2 nd electrode 46 to connect them, and then pulls the operating rod 70 downward (see also fig. 1). When the operating rod 70 is pulled, the fuse tube 12 is held in the high-voltage breaker 100 by the clamping force of the 1 st electrode 56 and the clamping force of the 2 nd electrode 46, and therefore, the spring member 90 elastically deforms and the engagement between the flange portion 26 and the claw portion 90c is released, and the fuse tube 12 can be separated from the operating rod 70 in a state where the fuse tube 12 remains in the main body insulator 8.

When the fuse tube 12 is pulled out from the high-voltage breaker 100, the worker pushes the end of the fuse tube 12 into the housing member 86 in the same manner as when the fuse tube 12 is attached to the high-voltage breaker 100. After the claw portion 90c of the spring member 90 engages with the flange portion 26 of the fuse tube 12, the operator rotates the operating rod 70 (operating rod main body 74) while maintaining the engagement of the claw portion 90c with the flange portion 26. Specifically, the operating rod 70 is rotated so that the protruding portion 42 of the fuse tube 12 faces the engaging portion 86a of the housing member 86. As a result, the protrusion 42 engages with the engagement portion 86a. When the operation rod 70 is rotated, the protrusion 42 of the fuse tube 12 contacts the stopper 87, so that the operation rod 70 cannot rotate, and the operator can recognize that the protrusion 42 is engaged with the engagement portion 86a. After the projection 42 is engaged with the engagement portion 86a, the operation rod 70 is moved downward to pull out the fuse tube 12 from the high-voltage breaker 100. Since the projecting portion 42 is engaged with the engaging portion 86a, even if the fuse cylinder 12 is firmly held between the body insulator 8 and the two are firmly connected (even if the upper contact 52 and the lower contact 48 are firmly held between the 1 st electrode 56 and the lower contact 48 and the two are firmly connected), the fuse cylinder 12 can be reliably pulled out from the body insulator 8.

As described above, the operation rod main body 74 and the housing member 86 are rotatable with respect to the support member 84 and the spring member 90. Therefore, even if the operating rod main body 74 is rotated in a state where the end portion of the fuse tube 12 is housed in the housing member 86, the support member 84 and the spring member 90 do not rotate relative to the fuse tube 12. Therefore, when the fuse tube 12 is pulled out from the high-voltage breaker 100, it is possible to prevent damage to components (the fuse wire 40 and the like) arranged on the outer surface of the fuse tube 12. The spring member 90 is fixed (fitted) to the support member 84, and the support member 84 and the spring member 90 are loosely fitted to the operating rod main body 74 (the accommodating member 86). Therefore, the operation rod 70 can be easily attached to and detached from the fuse tube 12, and the support member 84 and the spring member 90 can be prevented from being damaged when the fuse tube 12 is inserted into the operation rod 70.

(modification of operation rod: embodiment 2)

A modification of the operation rod 70 will be described with reference to fig. 7 to 9. In the description of the present embodiment, the same features as those of the operation rod 70 of embodiment 1 are denoted by the same reference numerals as those of the operation rod 70 of embodiment 1, and the description thereof may be omitted. The operation rod 70 of the present embodiment uses a cylindrical body 85 having a plurality of grooves 85b on an outer circumferential surface 85c and a support member 84 having no grooves on an inner circumferential surface (see fig. 2 and 3 for comparison).

In the operation rod 70 of the present embodiment, the cylindrical body 85 is attached to the outer periphery of the housing member 86 in a loosely fitted state. More specifically, the inner circumferential surface of the cylindrical body 85 is not provided with projections and recesses (grooves and the like), and the inner circumferential surface of the cylindrical body 85 is slidable with respect to the outer circumferential surface of the housing member 86. Therefore, the cylinder 85 can rotate relative to the housing member 86 and the operating rod main body 74. The support member 84 is fixed (fitted) to the cylindrical body 85. Therefore, the support member 84 is also rotatable with respect to the operation rod main body 74.

A plurality of grooves 85b are provided on the outer peripheral surface 85c of the cylindrical body 85. The groove 85b extends from one end to the other end in the axis 72 direction. Further, a projection 85d projecting in the radial direction is provided on the outer peripheral surface 85c of the cylindrical body 85. In the axis 72 direction, the convex portion 85d is provided from the front end side end surface of the cylinder 85 to the middle portion of the cylinder 85. A step is provided on the outer peripheral surface 85c of the cylindrical body 85 at a boundary portion between a portion where the convex portion 85d is provided (the tip side of the cylindrical end 85) and a portion where the convex portion 85d is not provided (the base side of the cylindrical end 85). The support member 84 is fitted into a portion of the outer peripheral surface 85 of the cylindrical body 85 where the convex portion 85d is not provided. In other words, the support member 84 is fixed to the cylindrical body 85 such that the convex portion 85d of the cylindrical body 85 is positioned closer to the distal end side of the operation rod 70 than the distal end side end face of the support member 84 (the end face opposite to the end face provided with the reduced diameter portion 84a in the axis line 72 direction).

In the operation rod 70 of the present embodiment, the linear portion 90b (see fig. 3) of the spring member 90 is housed in the groove portion 85b provided on the outer peripheral surface 85c of the cylindrical body 85. The spring member 90 is not fixed (fitted) to the groove portion 85b. The spring member 90 is fixed (fitted) to the outer peripheral surface 85c of the cylindrical body 85, whereby a part of the linear portion 90b of the spring member 90 (a portion sandwiched between the cylindrical body 85 and the support member 84) is fixed to the cylindrical body 85. Thus, the front end side portion of the spring member 90 (the portion provided with the convex portion 85d in the axis 72 direction) can be deformed in the radial direction. The operating rod 70 of the present embodiment is also the same as the operating rod 70 of embodiment 1, and the spring member 90 is rotatable with respect to the operating rod main body 74 and the housing member 86. Thus, the operation rod 70 of the present embodiment can obtain the same effects as the operation rod 70 of the above-described embodiment 1.

Specific examples of the present invention have been described in detail, but these are merely examples, and the claims are not limited thereto. The technique recited in the claims further includes: various modifications and changes have been made to the specific examples described above. The technical elements described in the specification or the drawings exhibit technical usefulness alone or in various combinations, and are not limited to the combinations of the claims described at the time of filing. In addition, the techniques shown in the present specification and the drawings by way of example can achieve a plurality of objects at the same time, and achieving one of the objects has technical utility.

Claims (9)

1. An operating rod for disassembling and assembling a fuse tube used in a high-voltage disconnector,

the operation rod is provided with:

an operating rod main body;

a cylindrical housing member fixed to the distal end of the operating rod main body and capable of housing an end portion of the fuse tube;

a support member that surrounds the outer periphery of the housing member and is attached to the outer periphery of the operation rod main body in a loosely fitted state; and

and a spring member which is disposed between the receiving member and the support member, is loosely fitted to the receiving member, has one end portion protruding from a tip end of the receiving member in an axial direction in which an axial line of the receiving member extends, and has the other end portion protruding toward the axial line of the receiving member, and is provided with a claw portion which engages with a flange portion provided on an outer peripheral surface of the fuse tube when the fuse tube is attached to and detached from the high-voltage breaker.

2. The joystick according to claim 1,

a fixing member fixed to the operation rod main body is provided on a base portion side opposite to a front end of the accommodating member in the axial direction,

the support member and the spring member are disposed between the accommodating member and the fixing member in a loosely fitted state.

3. An operating rod according to claim 1 or 2,

the other end portion of the spring member opposite to the one end portion in the axial direction is provided with a restricting portion that is bent toward the axial side and comes into surface contact with the base-side end portion of the housing member to restrict the movement of the spring member in the axial direction.

4. An operating rod according to claim 1 or 2,

a reduced diameter portion having an inner diameter smaller than that of the other portion is provided on the base portion side of the support member.

5. An operating rod according to claim 1 or 2,

the inner peripheral surface of the support member is provided with a plurality of grooves extending in the axial direction,

the spring member is fitted in the groove portion.

6. An operating rod according to claim 1 or 2,

an inclined portion whose inner diameter increases toward an end portion in the axial direction is provided on a distal end side of the support member.

7. An operating rod for disassembling and assembling a fuse tube used in a high-voltage disconnector,

the operation rod is provided with:

an operating rod main body;

a cylindrical housing member fixed to the distal end of the operating rod main body and capable of housing an end portion of the fuse tube;

a cylinder body which is mounted on the outer periphery of the accommodating component in a loose fitting state;

a support member fixed to the outer periphery of the cylinder; and

and a spring member which is disposed between the cylindrical body and the support member, is fixed to the cylindrical body, has one end portion projecting from the tip of the housing member in the axial direction in which the axis of the housing member extends, and has the other end portion projecting in the axial direction of the housing member, and is provided with a claw portion which engages with a flange portion provided on the outer peripheral surface of the fuse tube when the fuse tube is attached to and detached from the high-voltage disconnector.

8. The joystick according to claim 7,

a fixing member fixed to the operation rod main body is provided on a base portion side opposite to a front end of the accommodating member in the axial direction,

the support member and the spring member are disposed between the accommodating member and the fixing member in a loosely fitted state.

9. An operating rod according to claim 7 or 8,

the outer peripheral surface of the cylinder is provided with a plurality of groove parts extending along the axial direction,

the spring member is housed in the groove portion.

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