JPS6334432B2 - - Google Patents

Description

[Detailed description of the invention]

Technical Field The present invention is designed to promptly detect fault points such as ground faults and short circuits on power distribution lines by displaying a message that is hung directly on electric wires to display when an overcurrent due to an accident or the like passes through the electric line. The present invention relates to an indicator valve of a current passage indicator. Prior Art The applicant of the present invention has already constructed an overcurrent passage display device in which a viscous colored fluid, such as oil, with a low specific gravity and a transparent fluid with a high specific gravity are stored in two layers, separated into upper and lower layers. We have proposed an indicator valve that can move up and down in the fluid. The display valve was normally disposed entirely in a transparent fluid so that it could be clearly seen through a display window provided at the bottom of the display tube. In addition, when an overcurrent flows, the display valve is pulled up into the colored fluid via a display drive unit etc. which is detected by a current detector,
The colored fluid was made visible through the display window to indicate the passage of an overcurrent, and then it was brought back down by its own weight, resisting the viscous resistance of the fluid. Purpose The purpose of the present invention is to enable the above-mentioned indicator valve to effectively remove the colored fluid below the indicator valve when the indicator valve is lowered by its own weight.
An object of the present invention is to provide an indicator valve for an overcurrent passage indicator that can stably lower the voltage. Embodiment Hereinafter, an embodiment embodying the present invention will be described with reference to FIGS. 1 to 12. This overcurrent passage display device can be roughly divided into a current detection section A that detects an overcurrent, a drive mechanism B that is driven by the detection section, a lifting mechanism H that is lifted by the drive mechanism B, and a lifting mechanism H that is operated by the same drive mechanism B. It is composed of a display device I that performs a display operation. First, we will explain the current detection section A. This detection section controls the detection current transformer CT attached to the electric wire L and the transform current generated in the transformer CT when an overcurrent flows through the electric wire L. , and a control circuit C that drives the rotary solenoid RS. Next, the drive mechanism B will be explained. The rotary solenoid RS has a structure in which the output shaft is rotationally driven when the rotary solenoid RS is energized, and when the energization is released, the output shaft is rotated back to its original position by a built-in return spring S as an energy storage member. 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 disc-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; ing. The rotary solenoid RS, the drive plate 2, and the actuating member 3 constitute a drive mechanism B. Next, the lifting mechanism H will be explained. 5 is the rotary solenoid in the frame 1;
A support plate part 6 stands vertically opposite to the rotary solenoid RS, and is a lifting member whose base end is attached to a shaft 7 so as to be freely rotatable in both directions in the support plate part 5. It is located above (upper left in Figure 4). Note that the lifting member 6 is locked by a stopper portion 1a provided at the lower part of the frame body 1 in the normal state. 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 (not shown) is provided in the center above the shaft 7. A guide protrusion 10 is provided in a protruding manner. Reference numeral 11 denotes a string-like member whose base end is engaged with the engagement protrusion 9, inserted into the guide hole 8 through the slit of the guide protrusion 10, and extended downward. In addition,
The string-like member 11 in the slit 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 an elastic locking member which is attached with a screw 14 on the opposite side of the lifting member 6 from the rotary solenoid RS, and the center portion thereof goes around the upper part of the lifting member 6. It is bent so as to protrude obliquely downward toward the rotary solenoid RS side, and its tip is bent horizontally at an acute angle toward the lifting member 6 side, and projects into the through hole 12. . When the actuating member 3 rotates from above, the oblique part 13a of the locking member 13 is pressed against the actuating claw 4 of the actuating member 3 against its own elastic force, and the lifting member 6 and the locking member 13
The lower surface 16 of the tip 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. 20 bolts (see FIG. 2) are attached to the frame 1 through a transparent lid 19 made of synthetic resin. The upper central surface of the lid 19 is formed with a funnel-shaped recess, and the lower central surface is formed with a protrusion 21, with an insertion hole 22 extending vertically through 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 contacts the inner periphery of the main body case 25 in a watertight manner.
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 within the fluids 29 and 30, and is connected to the insertion hole 22 of the lid 19.
The tip of the string-like member 11 inserted therein is engaged with a stopper member 32 that comes into contact with the lower surface of the valve body 31. As shown in FIG. 8, this valve body 31 is made of discs made of a silver-white light metal such as aluminum, divided into an odd number (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 into a swash plate so that the thickness increases from the outer periphery toward the center, and the lower surface of the valve body 31 as a whole has a conical shape. Therefore, the center of the valve body 31 is heavy. In addition, in addition to the conical shape, there is a 12th
As shown in Figures a to c, all shapes that descend toward the center can be adopted. 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. Furthermore, a receiving flange 3 is provided at the upper center of the stopper member 32.
Attachment trunk 38 for string-like member 11 with diameter reduced from 6
is formed, and a fastening body part 3 is formed at the center lower part.
A locking step portion 39 is formed which has a diameter larger than that of the receiving flange 8 and has a smaller diameter than that of the receiving flange 36. Furthermore, a notch groove 40 is formed from one side of the stop member 32 along with both flanges 36 and 37 to the center, and from the opposite side of the stop flange 37 and the stop step 39, is the cutout groove 4 cut up to the locking body part 38.
1 is formed. Therefore, this stop member 32
The tip of the string-like member 11 inserted through the through-hole 35 of the communication member 34 is inserted into the notch groove 40 in the vertical direction, reversed downward and introduced into the notch groove 41, and then inserted into the notch groove 41. The string member 11 is wound around the notched groove 40 so that it cannot be removed from the groove 40. Note that the tip of the string-like member 11 is fixed by means such as being inserted between the string-like members 11 wound around the fastening trunk 38 or being adhered to the fastening trunk 38 with an adhesive. The valve body 31 is installed inside the reflection member 28 so as to be movable up and down with a small gap, and
By bending downward at the bending portion 34a (see FIG. 9) provided between each sector-shaped valve piece 33 in the connecting member 34, each sector-shaped valve piece 33 is attached to the valve body 3.
This allows for slight downward tilting around the center of 1. 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 stopper 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 so as to leave 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, an overcurrent exceeding a set value has passed through the electric wire L. In this case, the transformer CT generates a transform current, and the control circuit C causes the rotary solenoid
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 while resisting its elastic force (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, after finishing the rotation, the rotary solenoid
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. Wind up the string member 11.
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 tip of the locking member 13, as shown in FIG. 4d. At this time, the valve body 31 of the display device I is positioned above the colored fluid 29 as shown in FIG. can do.
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. Therefore, the colored fluid 29 below the valve body 31 moves toward the outer periphery while being guided by the conical lower surface of the valve body 31, and the colored fluid 29 moves toward the outer circumference while being guided by the conical lower surface of the valve body 31, and the colored fluid 29 moves toward the outer circumferential direction while being guided by the conical lower surface of the valve body 31. Sector-shaped valve piece 3 shown in the figure
3 from between the outer periphery of the connecting member 34 and the reflective member 28 in the gap Q between 3 and upward. Therefore, the valve body 31 is guided by the colored fluid 29 flowing upward from the outer periphery of the connecting member 34 and the reflecting member 28 in the gap Q, and the stability of the drop of its own weight is high. Then, due to the viscous resistance of this colored fluid 29, the valve body 31 is delayed and lowered, 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. At this time, as the lower surface of the partially fan-shaped valve piece 33 is submerged into the transparent fluid 30, the colored fluid 29 moves upward toward the outer periphery because the lower surface rises upward toward the outer periphery. However, the valve body 31 and the reflecting member 2
8 and the colored fluid 2 above the valve body 31
Become one with 9. In this embodiment, the valve body 31 is a sector-shaped valve piece 33.
Since the connecting member 34 is smaller than the above, the gap Q formed between the fan-shaped valve pieces 33 is exposed, and becomes a plurality of notches 42 formed on the outer periphery of the valve body 31.
When the notch 42 falls under its own weight, it becomes a flow path for the colored fluid 29 on the lower surface of the valve body 31, and the valve body 31 is guided by the colored fluid 29 flowing upward through the flow path and settles in a stable state. Can be done. Another embodiment will be described with reference to FIG. In this embodiment, the valve body 31 as the indicator valve of the first embodiment is integrally formed of light metal or synthetic resin, and its lower surface is shaped to become thicker from the outer periphery toward the center. The difference is that a plurality of notches 42 are formed on the outer periphery. Further, its specific gravity is slightly larger than that of the colored fluid 29. The colored fluid 2 is lifted up by the lifting mechanism H.
9, the colored fluid 29 above the valve body 31 moves below the valve body 31 through the notch 42. Also, when the lifting operation is completed,
The specific gravity of the valve body 31 is slightly larger than that of the colored fluid 29, and due to the viscous resistance of the colored fluid 29, the weight of the valve body 31 falls with a delay. At this time, the notch 42 of the valve body 31 becomes a flow path for the colored fluid 29, and the colored fluid 29 flowing upward through the flow path causes the valve body to
1 is guided and settles in a stable state. The effects of the invention are the same in this embodiment as well. In addition, in this embodiment, when the valve body 31 is formed of a synthetic resin material, its lower surface is plated with metal,
Alternatively, a metal coating may be applied to make the specific gravity slightly larger than that of the colored fluid 29, or a metal may be placed in a synthetic resin material to make the specific gravity slightly larger than that of the colored fluid 29. Next, a first approximation example that is not directly related to this invention will be described.
This will be explained according to Figure 4. This valve body 31 serving as an indicator valve differs from the second embodiment in that its overall shape is disk-shaped. Therefore, in this embodiment, there is no function to actively guide the colored fluid 29 on the lower surface of the valve body 31 toward the outer circumference when the valve body 31 is lowered by its own weight as in the present invention. Effects As detailed above, in this invention, the lower surface of the valve body 31 as an indicator valve is formed to be thick at the center and thinner toward the outer periphery so that the center becomes heavier. The colored fluid 29 below the valve body 31 can be effectively removed, and the valve body 31 can be lowered in a very stable state, resulting in an excellent effect that the delayed descent time can be kept constant. play. It should be noted that the present invention is not limited to the above-mentioned embodiments, and may be modified as desired without departing from the spirit of the present invention.

[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 lifting mechanism, where 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. , FIG. 12 is a side view showing the shape of the lower surface of the display valve, FIG. 13 is a cross-sectional perspective view of the display valve showing a second embodiment, and FIG. 14 is a cross-sectional perspective view showing an approximate example. Display valve (valve body)...31, sector-shaped valve piece...33,
Connecting member...34.

Claims (1)

[Claims] 1. A fluid is stored in a display tube, and a circular display valve that can move up and down is disposed within the fluid, and when an overcurrent passes, its electrical energy is converted into mechanical energy. The display valve is moved upward by a predetermined distance using the same mechanical energy, and then the mechanical restraint force on the display valve is released and the display valve is lowered by its own weight, and the descending speed is controlled by the fluid. 1. An indicator valve for an overcurrent passing indicator, which is designed to ensure a predetermined display time using fluid, and is characterized in that the bottom surface of the overcurrent passing indicator is shaped to become thicker from the outer periphery toward the center. 2. The indicator valve of the overcurrent passage indicator according to claim 1, characterized in that a plurality of notches are formed at equal intervals from the outer periphery of the indicator valve. 3. The overcurrent according to claim 2, wherein the notch on the outer periphery of the indicator valve is exposed from the outer periphery by reducing the diameter of the connecting member so that the gap formed between the fan-shaped valve pieces is made smaller. Indication valve of passage indicator.