JPH0156708B2 - - Google Patents

Description

[Detailed description of the invention]

Technical Field This invention relates to an overcurrent passage display device that is hung directly on a power line to indicate that an overcurrent due to an accident has passed through the power line, in order to discover fault points such as ground faults and short circuits in power distribution lines. It is. Prior Art Overcurrent passage display devices are mainly used as a means for early detection of points where overcurrent has passed through power distribution lines, and they usually continue to display for about 3 to 5 hours required for inspection, and also after a certain period of time has elapsed. After that, a function is required to return to the normal normal state. A type of display device of this kind was considered that could be hung directly on a power distribution line and would detect the current using a CT and operate the display, but a mechanical display could be operated using the electromagnetic force caused by an overcurrent passing through the power distribution line. Therefore, in reality, the mechanical operation of the display device must operate faster than the OCR operation of the substation, and the fault current is usually around 600A to 1000A and the transit time is instantaneous, so it is necessary to operate the display device's mechanical operation faster than the OCR operation at the substation. It is not easy to use energy to instantly operate a display device, to continue this operation for a predetermined period of time, and to automatically restore the display device. Therefore, as in Japanese Patent Application No. 56-30133, the applicant converted the electrical energy from the current detected by CT into mechanical energy and temporarily stored it.
By adopting a method of displaying with a time lag, the above problems can be solved at once, and fault display operations can be performed reliably in response to instantaneous overcurrents.
We have proposed an overcurrent passage display device that can automatically recover after a certain period of time. This overcurrent passage display device includes a current detection section arranged to surround an electric wire, a drive mechanism that rotates while accumulating an energy storage member when the detection section detects an overcurrent.
and a drive transmission mechanism unit that is linked to operate the display device only when the drive mechanism returns to its original state due to the stored force of the stored force member. The drive transmission mechanism includes a gear mechanism linked to the drive mechanism, an actuation lever rotated by the gear mechanism, and an overcurrent passage display part that is linked to the actuation lever and visually visible from the outside when the actuation lever returns. It consists of a rotating member that is driven in the direction in which the overcurrent is enabled, and a tripping member that releases the link between the rotating member and the operating lever after the drive to the overcurrent passing display position is completed. However, as mentioned above, this drive transmission mechanism has a large number of component parts such as gear mechanisms, and therefore the assembly work is not only complicated and time-consuming, but also causes high costs and problems such as reliability. Easy to occur. Purpose The purpose of the present invention is to solve the above-mentioned problems, reduce the number of parts, improve assembly work, and improve reliability, thereby ensuring reliable overcurrent passage display. An object of the present invention is to provide an overcurrent passage display device that obtains the following. Embodiment Hereinafter, an embodiment embodying the present invention will be described in the first to
This will be explained according to FIG. This overcurrent passage display device can be roughly divided into a current detection section A that detects overcurrent, a drive mechanism B that is driven by the detection of the detection section, and a drive transmission mechanism section that performs a lifting operation by the drive mechanism B. It is composed of a lifting mechanism H and a display device I operated by the lifting mechanism H. Therefore, first, we will explain about the current detection part A. This detection part is connected to the detection current transformer CT' attached to the electric wire L, and when an overcurrent flows through the electric wire L, the transformer
The control circuit C controls the transform current generated in the CT and drives the rotary solenoid RS. Next, the drive mechanism B will be explained. When the rotary solenoid RS is energized, a return spring S is installed as an energy storage member with an output shaft inside.
The output shaft is driven while accumulating energy, and upon release of excitation, the output shaft is rotated back to its original position by the same return spring S. Reference numeral 1 shown in FIGS. 1 and 2 is a frame suspended from the lower part of a wire clamping portion (not shown), and fixes the rotary solenoid RS. 2 is a disk-shaped drive plate fixed to the output shaft of the rotary solenoid RS; 3 is an actuating member attached to the outer periphery of the drive plate 2, from which an actuating pawl 4 extending outward is formed protrudingly; There is. The rotary solenoid RS includes a drive plate 2,
The actuating member 3 constitutes a drive mechanism B. Next, the lifting mechanism H will be explained. 5 is the rotary solenoid in the frame 1;
The support plate section 6, which is provided upright to face the RS, is a lifting member as a rotating member whose base end is attached to a shaft 7 so as to be freely rotatable in both directions on the support plate section 5, and is a lifting member as a rotating member. It is located diagonally above RS (upper left in Fig. 4). Note that, in a normal state, the lifting member 6 is locked by a stopper portion 1a provided at the lower part of the frame 1. The tip of the lifting member 6 is provided with a guide hole 8 passing through both the upper and lower surfaces, and the proximal end is formed with a protrusion 9, and a slit 10a is formed in the center above the shaft 7.
A guide protrusion 10 is provided to protrude. 11 has its base end engaged with the engagement protrusion 9, and is inserted into the guide hole 8 through the slit 10a of the guide protrusion 10.
It is a string-like member that is inserted through the holder and extends downward. Note that the string-like member 11 in the slit 10a of the locking projection 9 and the guide projection 10 is fixed with adhesive. Reference numeral 12 denotes a through hole formed through a side portion of the lifting member 6 near the proximal end. As shown in FIGS. 3 and 4, reference numeral 13 denotes a locking member as an elastic cam member which is attached with a screw 14 on the side opposite to the rotary solenoid RS of the lifting member 6, and its central portion is connected to the lifting member. 6 It goes around the upper part and is bent so as to protrude obliquely downward on the rotary solenoid RS side,
The tip thereof is bent at an acute angle toward the lifting member 6 so as to be horizontal, and projects into the through hole 12. When the actuating member 3 rotates from above, the oblique part 13a as a retracting part of the locking member 13 is pressed against the elastic force by the actuating claw 4 of the actuating member 3, and the lifting member 6 The lower surface 16 of the tip of the locking member 13 as a locking portion can be engaged with and detached from the operating claw 4. The lifting member 6, the string member 11, and the locking member 13 constitute a lifting mechanism H. Next, the display device I will be explained. Reference numeral 18 shown in FIG. 1 is a bottomed cylindrical display tube made of colorless and transparent synthetic resin or glass, which is provided below the frame 1, and is screwed into the upper end opening in a watertight manner. Twenty bolts (see Fig. 2) are attached to the frame 1 via a transparent lid 19 made of synthetic resin. A funnel-shaped recess is formed on the upper center surface of the lid 19, and a protrusion 21 is formed on the lower center surface, and an insertion hole 22 is provided in the vertical direction of the protrusion 21. Reference numeral 23 is a black hook member screwed onto the outer periphery of the lower end of the display tube 18, and a rotating fitting groove 24 is recessed in the upper end of the hook member. The lower end of a cylindrical main body case 25 whose upper end is fitted into the lower surface of the electric wire clamp (not shown) is fitted into the fitting groove 24 . 26 is a locking protrusion protruding from the outer periphery of the display tube 18 so as to be located above the hook member 23;
Between the locking protrusion 26 and the upper surface of the hook member 23, there is an O-ring 2 that is installed in a watertight manner on the inner periphery of the main body case 25.
7 is fitted. Reference numeral 28 denotes a cylindrical reflective member made of aluminum or the like and made of silvery white and fitted onto the inner periphery of the display cylinder 18 .
Reference numerals 29 and 30 indicate a colored fluid with low specific gravity and high viscosity (red in this example) and a transparent fluid with high specific gravity and low viscosity (colorless in this example), which are stored in required amounts in upper and lower layers in the display tube 18, respectively. It is. Note that it is desirable that the ratio of the specific gravity is set to 2.0 or more because the two-layer separation will be stable, but even if the ratio is 1.5 or more, the separated state will be good if the standing time is long, so this setting is also acceptable. Further, both fluids 29 and 30 are liquids whose viscosity changes little due to changes in external environmental conditions, such as colored fluid 2.
Silicone oil was used as 9 and Fluorinert (Minnesota Mining & MFG) was used as transparent fluid 30.
Company's proprietary trademark), uses fluorinated inert liquids such as fluorocarbon oils. Reference numeral 31 denotes a valve body as an indicator valve that is always located in the fluids 29 and 30, and the tip of the string-like member 11 inserted into the insertion hole 22 of the lid 19 is connected to the valve body 3.
1 and is engaged with a stopper member 32 made of synthetic resin that comes into contact with the lower surface of the member 1. As shown in FIG. 8, this valve body 31 is made of discs made of a silver-white light metal such as aluminum, which are equally divided into a plurality (three in this embodiment) and arranged at a predetermined distance Q from each other. A thin circular connecting member 34 made of a closed foam elastic body made of polyethylene or the like is attached to the upper surface of each fan-shaped valve piece 33 with a diameter slightly reduced from the circumferential surface of the fan-shaped valve piece 33. It is composed of. Further, the lower surface of the sector-shaped valve piece 33 is formed obliquely so that the thickness increases from the outer periphery toward the center, and the lower surface of the valve body 31 has a conical shape. Reference numeral 35 shown in FIG. 10 is a through hole provided in the center of the connecting member 34 through which the string member 11 is inserted. As shown in FIG. 11, the stop member 32 has a receiving flange 36 formed at its upper end that comes into contact with the lower surface of the center of the connecting member 34, and its lower end has a diameter larger than that of the receiving flange 36 and is connected to the fan-shaped valve piece 33. A locking flange 37 is formed to lock the lower surface of the center. Further, at the upper center of the stopper member 32, an engaging trunk portion 3 for the string-like member 11 whose diameter is smaller than that of the receiving flange 36 is provided.
8 is formed, and a locking stepped portion 39 whose diameter is larger than that of the locking body portion 38 and smaller than that of the receiving flange 36 is formed at the lower center. Further, from one side of the stop member 32, a common notch groove 40 is formed in both the flanges 36, 37 and the locking body 38 to the center, and the locking flange 37, the locking stepped portion 39 A cutout groove 41 is formed from the opposite side to the locking trunk 38 . The surface of the stopper member 32 is plated with metal to prevent the colored pigments contained in the colored fluid 29 from adhering. Therefore, this stopper member 32 inserts the tip of the string-like member 11 inserted into the through hole 35 of the connecting member 34 into the notch groove 40 in the vertical direction, turns it over at the bottom, and introduces it into the notch groove 41. And then,
The string-like member 11 is wound around the fastening trunk 38 to prevent the string-like member 11 located in the cutout groove 40 from being removed from the groove 40. Note that the tip of the string-like member 11 is connected to the attachment trunk 3.
It is fixed by inserting it between the string-like members 11 wound around the threads 8, or by adhering it to the fastening body part 38 with an adhesive. The valve body 31 is disposed within the inner periphery of the reflecting member 28 so as to be able to move up and down with a slight gap,
By bending downward at the resilient portions 34a (see FIG. 9) corresponding between the sector-shaped valve pieces 33 in the connecting member 34, each sector-shaped valve piece 33 is connected to the valve body 31.
This allows for slight downward tilting around the center. When the fan-shaped valve piece 33 is tilted so that the center part is upward and the outer peripheral part is downward, the central lower surface of the sector-shaped valve piece 33 is connected to the locking flange 37 of the stop member 32.
By contacting the top surface, the amount of tilting is always kept constant. Further, the apparent specific gravity of the valve body 31 is made larger than the colored fluid 29 and smaller than the transparent fluid 30, so that the entire lower surface of the fan-shaped valve piece 33 is submerged in the transparent fluid 30 in the normal state, so that the display window is closed. It is positioned with a gap between it and the bottom 18a of the display tube 18, which also serves as the display tube. In this embodiment, the magnitude relationship between the specific gravity of the fan-shaped valve piece 33, the connecting member 34, the colored fluid 29, and the transparent fluid 30 and the apparent specific gravity of the valve body 31 is as follows. Fan-shaped valve piece 33 > Transparent fluid 30 > Entire valve body 31 >
Colored fluid 29>Connecting member 34 To explain the operation of the overcurrent passage display device configured as above, when an overcurrent exceeding a set value passes through the electric wire L, a transformed current is generated by the transformer CT, Rotary solenoid by control circuit C
The output shaft of the RS is rotated 45 degrees while resisting the elastic force of the built-in return spring S. At this time, the actuating member 3 is rotated in the direction of the arrow from the position in FIG. 4a to the position in FIG. 4b via the drive plate 2.
The actuating claw 4 of the actuating member 3 rotating from above pushes the oblique part 13a of the locking member 13 toward the lifting member 6 side (the third
(see FIG. 4b), then release the pressure on the diagonal portion 13a and rotate it to its lower position (see FIG. 4b).
The slanted portion 13a whose pressure has been released returns to its original position by its own elastic force. Note that the operation of the actuating member 3 due to the rotation of the rotary solenoid RS up to this point is instantaneously performed. Then, the rotary solenoid that has finished rotating
The output shaft of the RS starts to rotate back in the opposite direction, that is, in the counter-driving direction, by the built-in return spring S. As a result, when the operating claw 4 rotates to the positions c and c in FIG. The shaped member 11 is rolled up. Therefore, the valve body 31 of the display device I is pulled upward through the string member 11 while resisting the gravity and the viscous resistance of the fluids 30 and 29. At this time, the valve body 31 is attached to the fan-shaped valve piece 3 as shown in FIG.
3 is bent while resisting the elastic force of the connecting member 34.
At 4a, it is tilted by a certain amount while being bent downward, and the entire body is moved into the colored fluid 29. When the actuating pawl 4 is further rotated in the counter-driving direction, the actuating pawl 4 completes the lifting operation of the valve body 31 and separates from the lower surface 16 of the distal end of the locking member 13, as shown in FIG. 4d. After the operating claw 4 is released, the lifting member 6 instantaneously rotates back in the direction of the arrow in FIG. 4e until it is stopped by the stopper portion 1a of the frame 1 due to its own weight. On the other hand, when the operating claw 4 is released from the lower surface 16 of the distal end of the locking member 13, the valve body 31 of the display device I
As shown in FIG. 6, is located above the colored fluid 29 to display an overcurrent passage display, and the color of the colored fluid 29 can be visually recognized through the bottom 18a of the display tube 18. At this time, the lifting member 6 instantaneously rotates back and locks with the stopper portion 1a as described above, and its tip is positioned downward, so that no load is applied to the string member 1 as shown in Fig. 4e. It bends upward between the guide hole 8 and the slit 10a as shown in FIG. Then, as shown in FIG. 7, the valve element 31 of the display device I begins to descend due to its own weight, and due to the viscous resistance of the colored fluid 29 and the elastic force of the connecting member 34, the upper surface of each sector-shaped valve piece 33 becomes horizontal. It returns to its tilting position, and its lower surface returns to its conical shape. Thereafter, the valve body 31 is delayed and lowered due to the viscous resistance of the colored fluid 29, and after a predetermined time, the fan-shaped valve piece 3
3. The entire lower surface is submerged in contact with the transparent fluid 30 and returns to normal display. In this embodiment, since the stopper member 32 is provided with notch grooves 40 and 41 and the engaging trunk portion 38, the tip of the string member 11 inserted through the through hole 35 of the connecting member 34 is inserted into the notch groove 40. It is inserted in the vertical direction, reversed downward, and introduced into the notch groove 41, and then the string-like member 11 in the notch groove 40 is made impossible to separate from the groove 40, and the fastening body part 3 is inserted.
It can be wound up to 8 times. This makes it possible to ensure that the string-like member 11 is secured to the stopper member 32. Furthermore, since the stop member 32 disposed on the lower center surface of the valve body 31 can lock the lower surface of the sector-shaped valve piece 33 tilting downward at its locking flange 37, the amount of tilting of the sector-shaped valve piece 33 can be reduced. It can be regulated to a certain extent. Therefore, excessive downward tilting of the valve body 31 can be prevented, thereby preventing the valve body 31 from tilting downward excessively.
It is possible to make the time required for the fan-shaped valve piece 33 to return from the tilted state to the horizontal state to be constant when the dead weight descent is started after the first lifting operation is completed. Further, since the surface of the stopper member 32 is metal plated, the colored pigment contained in the colored fluid 29 will not adhere to it. Further, in this embodiment, the string-like member 11 is fixed to the engagement protrusion 9 and the slit 10a of the lifting member 6 as a rotating member, and the string-like member 11 is attached to the display tube 18 side through the guide hole 8. is being extended. Therefore, when the rotating member 6 that has finished its lifting operation rotates in the direction of the arrow in FIG. can.
Thereby, the operation of the drive transmission mechanism and the display device I can be ensured without the string member 11 being hooked on other members. Further, since the cam member is constituted by the bent member 13 having elasticity, its manufacture is easy. As described above in detail, the present invention provides a drive transmission mechanism with a cam member that is linked to the actuating member only for the return rotation of the actuating member that constitutes the drive mechanism, and a display device that is linked to the cam member to display an overcurrent passing indication. By having a rotating member that drives in the direction, the number of parts can be reduced to improve assembly work and reliability, thereby ensuring reliable overcurrent passage display. be effective. Note that the present invention is not limited to the above-described embodiment; for example, the specific gravity of the fan-shaped valve piece of the display valve may be the same as that of the above-mentioned embodiment, only the material may be changed to a synthetic resin material, and the surface thereof may be plated with metal. It is also possible to make arbitrary changes without departing from the spirit of the invention, such as to prevent adhesion of colored pigments to colored fluids.

[Brief explanation of drawings]

FIG. 1 is an overall schematic diagram of an embodiment embodying the present invention, FIG. 2 is a plan view of the drive mechanism, and FIGS. 3 a to 3 c are explanations showing the linked operation of the actuating member and the locking member. 4 are explanatory diagrams showing each state of the drive transmission mechanism, in which a is a normal state diagram and b is a
Fig. 3 shows a state in which the actuating member has rotated 45 degrees from the state shown in Fig. 3. c shows a state in which the actuating member is locked to the locking member. d shows a state in which the actuating member is just before returning. e shows a state in which the lifting member is rotating to return. Figure 5 is a cross-sectional view of the display device with the indicator valve in the raised state, Figure 6 is a cross-sectional view of the display device in the overcurrent passage display state, Figure 7 is a cross-sectional view with the display valve in the lowered state, and Figure 8 9 is an enlarged exploded perspective view of the display valve, FIG. 9 is a plan view of the display valve, FIG. 10 is a cross-sectional view of essential parts of the display device in the lowered state, and FIGS. 11a and 11b are side and bottom views of the stop member, respectively. It is. Operating member...3, lifting member as a rotating member...6, guide hole...8, engaging projection...9, slit...
10a, a string-like member...11, a locking member as a cam member...13, a diagonal part as a retraction part...13a,
Lower surface of the tip of the locking member as a locking portion...16, display cylinder...18, colored fluid...29, valve body as a display valve...31, stop member...32, fan-shaped valve piece...33, connection member...34, receiver Flange...36, Locking flange...37, Locking body...38, Notch groove...40,4
1. Current detection section...A, drive mechanism...B, return spring...S as an energy storage member, lifting mechanism...H as a drive transmission mechanism section, display device...I, electric wire...L, rotary solenoid...RS.

Claims (1)

[Claims] 1. Current detection unit A arranged to surround electric wire L
and a drive mechanism B that rotates while accumulating the energy storage member S when the detection unit A detects an overcurrent, and a drive mechanism B that rotates while accumulating energy of the energy storage member S, and is linked only when the drive mechanism B rotates back due to the energy accumulation force of the energy storage member S. In an overcurrent passing display device that includes a drive transmission mechanism H for displaying a display device, the drive transmission mechanism H is linked to the actuation member 3 only when the actuation member 3 constituting the drive mechanism B rotates back. An overcurrent passage display device comprising: a cam member 13; and a rotating member 6 linked to the cam member 13 to drive the display device in the overcurrent passage display direction. 2 Drive mechanism B is rotary solenoid RS,
The overcurrent passage display device according to claim 1, wherein the actuating member 3 is fixed to the output shaft of the rotary solenoid RS, and the energy storage member is a return spring S for returning the output shaft built into the rotary solenoid RS. . 3 The cam member is an elastic locking member 13 attached to the rotating member 6, and the locking member 13 is pressed against the elastic force by the actuating member 3, which rotates when an overcurrent is detected. a retraction section 13a that retracts;
A locking portion 16 that locks on the locking member 13 that rotates back
The first claim characterized in that
The overcurrent passage display device according to item 2 or item 2. 4 The display device is connected to the rotary member 6 via a string-like member 11, and includes a display valve 31 that can be lifted up, and a colored fluid 29 that is stored and the display valve 31 is moved up and down within the same fluid 29. An overcurrent display device according to any one of claims 1 to 3, characterized in that it is constituted by a display tube 18 that is movably installed inside. 5 The rotating member 6 has a locking protrusion 9 at its base end that locks the base end of the string-like member 11, and a guide hole at its distal end through which the string-like member 11 is inserted and extends toward the display cylinder 18 side. 8, and a slit 10a located between the engagement protrusion 9 and the guide hole 8 and fixing the string member 11.
An overcurrent passage display device according to claim 4, characterized in that it is provided with:. 6 A fan-shaped valve piece 33 obtained by equally dividing the disc of the display valve 31, and each fan-shaped valve piece 33 on the upper surface of the same fan-shaped valve piece 33.
and a connecting member 34 that connects each other,
When moving upward, the fan-shaped valve piece 33 is centered around the center of the display valve 31.
The outer periphery of the display valve 31 can be tilted slightly downward, and a stop member 32 that is attached to the tip of the string-like member 11 is attached to the lower center surface of the indicator valve 31 that is attached to the string-like member 11.
The stop member 32 is provided with a receiving flange 36 that contacts the lower surface of the connecting member 34, and a receiving flange 36 that is engaged with the lower surface of the fan-shaped valve piece 33 to control the amount of tilting of the fan-shaped valve piece 33 when the outer periphery of the display valve 31 is tilted downward. Restricting locking flange 3
Claim 5 characterized in that 7 is provided.
Overcurrent passing indicator device as described in . 7. The overcurrent passage display device according to claim 6, wherein the surface of the stopper member 32 is plated with metal. 8 A locking body portion 38 is provided between the receiving flange 36 and the locking flange 37 of the stopper member 32, and a common common groove cut into the receiving flange 36, the locking body portion 38, and the locking flange 37 from one side. Notch groove 40
At the same time, a cutout groove 41 is formed on the other side of the locking flange 37, and the tip of the string member 11 inserted through the indicator valve 31 is inserted into the common cutout groove 4.
0 in the vertical direction, and is introduced into the notch groove 41 on the other side of the locking flange 37 while being reversed downward, and then can be wound around the locking body 38. An overcurrent passage display device according to claim 6 or 7.