JPS6334433B2 - - Google Patents

Description

[Detailed description of the invention]

Technical field: In order to quickly find fault points such as ground faults and short circuits on power distribution lines, this invention is designed to display an overcurrent display that is hung directly on electric wires to display when an overcurrent due to an accident or the like passes through the electric line. This invention relates to an indicator valve for a 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 separate layers, upper and lower. 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 the display window provided at the bottom of the display tube. Further, when an overcurrent flows, the display valve is pulled up into the colored fluid via a display drive unit etc. that is detected by a current detector,
The colored fluid was made visible through the display window to indicate the passing of the overcurrent, and then it was allowed to return to its original state after being lowered with a delay due to its own weight while resisting the viscous resistance of the fluid. Purpose The purpose of the present invention is to make the specific gravity of the fan-shaped valve piece constituting the indicating valve larger than the colored fluid and to make the specific gravity of the connecting member smaller than the colored fluid in the above-mentioned overcurrent passage indicating device. To provide an indicator valve of an overcurrent passage indicator which can descend under its own weight in a colored fluid in a stable state by making the lower part of the valve heavy. Embodiment An embodiment embodying the present invention will be described below with reference to FIGS. 1 to 11. 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. Note that the string-like member 11 in the slit of the engaging 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, and its tip is bent horizontally at an acute angle toward the lifting member 6 and protrudes into the through hole 12. The oblique portion 13a of the locking member 13 is connected to the operating claw 4 of the operating member 3 when the operating member 3 rotates from above.
The locking member 13 is pressed into contact with the locking member 13 while resisting its own elastic force, and retreats toward the lifting member 6, and the lower surface 16 of the distal end of the locking member 13 can be engaged with and disengaged 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 via 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. A lower end of a cylindrical main body case 25 is fitted into the fitting groove 24, and the upper end of the main case 25 is fitted into a lower surface of a wire clamping part (not shown). 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 tube 18 . Reference numerals 29 and 30 indicate a colored fluid with low specific gravity and high viscosity (red in this embodiment) and a transparent fluid with high specific gravity and low viscosity (colorless in this embodiment) which are stored in the display cylinder 18 in required amounts in upper and lower layers, 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 the colored fluid 2.
Silicone oil was used as 9, and Fluorinert (Minnesota Mining &
(trademark owned by MFG Company), uses fluorine-based 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, 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 as a whole has a conical shape. Therefore, the center of the valve body 31 is heavy. Note that the fan shape of the fan-shaped valve piece 33 used in this specification does not exclude the semicircular 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. 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 trunk 38.
6 is formed. Therefore, this stop member 32
The tip of the string-like member 11 inserted through the through-hole 35 of the connecting member 34 is inserted into the notch groove 40 in the vertical direction, reversed downward and introduced into the notch groove 46, and then inserted into the notch groove 46. 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 intervening between the string-like members 11 wound around the fastening trunk 38, or by adhering 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, and the display window It is positioned so as to leave a gap between it and the bottom 18a of the display tube 18, which also serves as a 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 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, 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. 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 passes through the very narrow gap between the fan-shaped valve piece 33 and the reflecting member 28, and the tenth Sector-shaped valve piece 3 shown in the figure
It moves upward from between the outer periphery of the connecting member 34 and the reflecting member 28 in the gap Q between 3 and 3. 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 in the transparent fluid 30, the colored fluid 29 moves upward toward the outer periphery because the lower surface is sloped 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 45 formed on the outer periphery of the valve body 31.
When the notch 45 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 colored fluid 29 flowing upward through the flow path guides the valve body 31 and settles in a stable state. be able to. Further, in this embodiment, a closed foam elastic body made of polyethylene or the like having a specific gravity lower than that of the colored fluid 29 is used as the connecting member 34, and is attached to the upper surface of the fan-shaped valve piece 33, which has a higher specific gravity than the colored fluid 29. Therefore, it is easy to adjust the apparent specific gravity of the entire valve body 31 as a display valve to be slightly larger than the specific gravity of the colored fluid 29. That is, by changing the size of this connecting member 34, the apparent specific gravity of the valve body 31 can be changed, and thereby the delay descent time can be easily changed slightly. Further, the fan-shaped valve piece 33 has its specific gravity adjusted to the connecting member 34.
Since the specific gravity is greater than the specific gravity of the valve body 31, the fan-shaped valve piece 33 never tilts upward around its center when the valve body 31 rises and falls, and the center of gravity is located below the valve body 31. The vertical movement of the valve body 31 becomes very stable. Next, an approximation example not directly related to this invention will be described. The valve body 31 as an indicator valve shown in FIG.
1 and a floating body 42 which is fixed to the upper surface of the display board 41 and is made of a light specific gravity material such as polyethylene closed foam, which has a specific gravity smaller than that of the colored fluid 29, and whose overall specific gravity is slightly larger than that of the colored fluid 29. There is. The floating body 42 has the same diameter as the display board 41, and a plurality of notches 45 are formed on its outer periphery. The valve body 31 shown in FIG. 12b differs from the valve body shown in FIG. 12a in that the diameter of the floating body 42 is smaller than that of the display plate 41. Figure 13a shows the notch 45 of the valve body 31 in Figure 12a.
The difference is that, instead of this, a communication hole 43 is provided through the upper and lower surfaces of the valve body 31 near the outer periphery. Figure 13b shows the notch 45 of the valve body 31 in Figure 12b.
The difference is that, instead of this, a communication hole 43 is provided through the upper and lower surfaces of the valve body 31 near the outer periphery. The notches 45 and the flow holes 43 of the valve body 31 shown in FIGS. 12 and 13 serve as flow paths for moving the colored fluid 29 above the valve body 31 downward when the valve body 31 is raised. The upward movement of the valve body 31 can be performed smoothly while reducing the resistance of the valve body 29. Therefore, in this valve body 31, the bending portion 34a of the present invention is not necessary, and there is no need to mold the fan-shaped valve piece 33, making its manufacture easy. In this approximation example, the cut 45,
The communication hole 43 is formed to actively serve as a flow path for the colored fluid 29 when the valve body 31 is raised. or,
Since the specific gravity of the valve body 31 is formed to be slightly larger than the specific gravity of the colored fluid 29, a sufficient delay descending time can be secured, and the notch 45 and the flow hole 43 will not interfere with the delayed descending. . Next, another example of approximation will be explained with reference to FIG. In this example, the valve body 31 in FIG.
The projections 44 are formed on the inner circumference of the display tube 18 in the vertical direction.
The display valve 31 is formed to protrude from the protrusion 44.
A notch 45 formed on the outer periphery is inserted loosely. By doing so, the valve body 31 can smoothly move up and down while being guided by the protrusions 44. In this approximation example, Fig. 12a
You may also use a valve body. Effects As detailed above, the present invention makes the specific gravity of the fan-shaped valve piece constituting the indicator valve larger than that of the colored fluid, and makes the specific gravity of the connecting member smaller than that of the colored fluid, thereby making the lower part of the indicator valve heavier. It has an excellent effect of descending under its own weight in a colored fluid in a stable state. 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 the drawing]

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 and FIG. 13 are perspective views of an indicator valve showing an approximate example not directly related to the present invention, and FIG. 14 is an enlarged view of the main parts. Display valve (valve body)...31, sector-shaped valve piece...33,
Connecting member...34.

Claims (1)

[Scope of Claims] 1. A colored fluid and a transparent fluid having a higher specific gravity than the same colored fluid are stored in a layered manner in a display cylinder, and a circular display valve that can move up and down is disposed within the fluid. When the current passes, the electrical energy is converted into mechanical energy, the mechanical energy moves the indicator valve upward a predetermined distance, and then the mechanical restraint on the indicator valve is released and the indicator valve lowers under its own weight. In an overcurrent passage display device that aims to secure a predetermined display time using a colored fluid by controlling the descending speed of the fluid, a sector-shaped valve piece with a circular shape divided into equal parts is provided with an elastic connecting member on its upper surface. An indicator valve for an overcurrent passage indicator, characterized in that the specific gravity of the connected indicator valve is greater than the colored fluid, and the specific gravity of the connecting member is smaller than the colored fluid. 2. The indicator valve of the overcurrent path indicator according to claim 1, wherein the indicator valve has a specific gravity smaller than that of the transparent fluid. 3. The indicator valve of the overcurrent passage indicator according to claim 1 or 2, wherein the connecting member is a closed foam elastic body, and the fan-shaped valve piece is made of a light metal such as aluminum. 4. An indicator valve for an overcurrent path indicator according to any one of claims 1 to 3, characterized in that the indicator valve has notches formed at equal intervals on its outer periphery. 5. The indicator valve of the overcurrent passage indicator according to claim 4, wherein the notch is exposed from the outer periphery by reducing the diameter of the connecting member by reducing the gap formed between the fan-shaped valve pieces. .