JP4152793B2 - Valve body opening indication device for T-tube with valve function - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a valve element opening degree display device in a T-shaped tube with a valve function used for removing impurities in a ductile cast iron pipeline.
[0002]
[Prior art]
Usually, drinking water is supplied by ductile cast iron pipes buried underground, but some foreign matters such as solid materials such as earth and sand are accompanied by the replacement and repair work of old pipes. There is a possibility that water will flow into the pipeline. In this way, when impurities are mixed in, the water quality adjusted as drinking water will deteriorate, so it is strongly required to discharge and remove it.
Therefore, as shown in FIG. 8, the present inventors excavate and form a pit 2 at a required portion of the pipeline 1 buried underground, and the straight pipe portion 3 a and the branching portion 3 b are formed in the pipeline 1 at the pit position. A T-tube 3 composed of the following is arranged, and a short tube 4 for adjustment, a repair valve 5 and a fire hydrant 6 are sequentially disposed on the T-tube 3 so that water can be taken from the discharge port 6a of the fire hydrant 6 in the event of a fire. A technique incorporating a mechanism for removing and removing foreign substances has been proposed (see Patent Document 1).
[Patent Document 1]
JP 2000-345590 A (3rd page, FIG. 2, FIG. 3)
[0003]
In this technique, the above-mentioned contaminant discharge and removal mechanism will be described with reference to FIG. 10. The axis of the pipe line 1 is directly coincident with the axis of the straight part 3a of the T-tube 3, and the axis of the branch part 3b orthogonal to this Is located at the center of the flow path passing through the pipe 1. A valve shaft 8 is disposed across the T-shaped tube 3 at this intersection, and an elliptical valve body 9 that opens and closes the straight tube portion 3a of the T-shaped tube 3 is fixed to the valve shaft 8, and the valve shaft 8 is rotated. The operation shaft 11 of the rotation drive means 10 such as a worm gear is erected so that it can be operated from the ground. An elliptical valve is formed by rotating the operation shaft 11 with an operation handle (not shown) from the ground. The body 9 is rotated to switch the fluid in the straight pipe portion 3a to the branching portion 3b side.
[0004]
Therefore, during normal water flow, as shown in FIG. 10, the elliptical valve element 9 is opened in parallel with the flow path to ensure the total flow rate, and when it is necessary to discharge impurities, the valve shaft 8 is rotated clockwise. When rotating, the elliptical valve body 9 also rotates in the same direction, the flow path is obliquely blocked (see FIG. 11), the upstream flowing water communicates with the branching portion 3b, and the other is completely blocked. The heavy contaminants that flowed while sinking near the bottom of the pipeline, and the fine contaminants that flowed down in the middle and upper layers of the pipe flow in a light and fine suspension form a branch 3b along with running water. It is discharged to the fire hydrant 6 side.
Further, when the valve shaft 8 is rotated counterclockwise from the fully opened state of the elliptical valve body 9 in FIG. 10, the elliptical valve body 9 is also rotated in the same direction and the flow path is blocked obliquely (see FIG. 12). ). Thereafter, impurities are discharged in the same manner as described above.
[0005]
The operation from the fully closed state shown in FIG. 11 to the normal water flow state is completed when the above-described contaminant discharge operation is completed. When the valve shaft 8 is rotated counterclockwise, the elliptical valve body 9 is moved as shown in FIG. It becomes a state. At this time, when the valve shaft 8 is rotated more than necessary, the elliptical valve element 9 is in a state of having a halfway inclination.
When the inclination of the elliptical valve body 9 due to the rotation of the valve shaft 8 is slight, there is not much problem. However, as shown in FIG. When normal water flow is started from this point, the cross-sectional area of the water flow becomes narrow due to the inclination of the elliptical valve body 9, the loss head increases, and a predetermined flow rate cannot be secured.
[0006]
Therefore, an indicator (opening indicator) 13 is provided in the rotation drive means 10 as shown in FIG. 9 so as to check the opening degree so that the opening degree is not halfway as described above. . The opening indicator 13 attaches the pointer 13a to a protruding portion 8a protruding outside from the valve shaft 8 through the gear box 12, and corresponds to the opening state of the elliptical valve element 9 on the upper surface of the gear box 12. A display scale portion 13b that displays various marks and characters is provided. For example, an arrow indicating which side of the pipe is discharged or a neutral position (fully open) is displayed in N, a fully closed state is displayed in S or the like in a manner that does not disappear easily. Then, it is possible to know in which direction the elliptical valve body 9 is directed, that is, whether the opening degree is “fully open” or which “fully closed”, according to the position indicated by the pointer 13a.
[0007]
[Problems to be solved by the invention]
However, the T-shaped tube 3 is laid in the pit 2 dug deep underground as shown in FIG. 8, and the opening indicator 13 is provided on the protruding portion 8 a of the valve shaft 8 of the T-shaped tube 3. It is very difficult to confirm the position indicated by the pointer 13a of the opening indicator 13 visually from the ground. That is, when the valve body is operated on the ground, it is difficult to judge by looking at the rotation state of the valve body.
However, the T-shaped tube 3 is laid in a pit dug deep underground, and an opening indicator 13 may be embedded as shown in FIG. 8, and when it is embedded, the pointer 13a cannot be visually observed. is there. Even if an enclosure is provided around the opening indicator 13 so as not to be buried, the distance from the ground becomes long. Therefore, the position indicated by the pointer 13a of the opening indicator 13 can be confirmed visually from the ground. A difficult situation.
In particular, when grasping the “full open” state of the elliptical valve body 9, the work efficiency is reduced, for example, by entering into the pit and checking.
[0008]
This invention makes it a subject to make it easy to confirm the opening degree of a valve | bulb on the ground with a simple structure.
[0009]
[Means for Solving the Problems]
In order to solve the above-described problems, the present invention provides a valve element opening degree display device in a T-shaped tube with this type of valve function, as described above, in which both the open position and the closed position of the valve element can be determined. Pay attention to the fact that it is only necessary to know exactly when ON, OFF, especially when the valve body is horizontal in the direction of the pipe axis. The opening was transmitted to the indicator on the ground. If only ON / OFF confirmation is performed, the position can be transmitted with sufficient accuracy by a wire or a belt, and the structure can be simplified.
As one specific configuration, the opening degree of the valve body in a T-shaped tube with a valve function that is buried in the ground and provided with a valve body via a valve shaft at the branch part from the straight pipe part to the branch pipe In the apparatus, a wire pulley is attached to the protrusion of the valve shaft from the T-shaped tube at a right angle and laterally, and a guide pulley is provided near the ground at a predetermined distance above the wire attachment member. One end of the wire is fixed to the distal end portion of the wire mounting member, the wire is hooked on the guide pulley, the other end is locked to an elastic body, and a valve body opening indicator is connected to the wire. Can be adopted.
With this configuration, the wire attachment member also rotates by opening and closing the valve body based on the pivoting operation of the valve shaft, and the wire fixed to the tip of the wire attachment member is wound or fed out. At this time, since the wire is pulled by the elastic body, the wire surely advances and retreats as the wire is wound or unwound, and by the advance and retreat of the wire,
The valve opening indicator displays the opening according to the advance / retreat.
As another specific configuration, a drive pulley is attached to the protruding portion of the valve shaft from the T-shaped tube, a driven pulley is provided near the ground at a predetermined distance above the drive pulley, and between the two pulleys. An endless belt can be stretched, and the endless belt can be connected to an opening indicator of the valve body. In this configuration, the drive pulley is rotated by opening and closing the valve body based on the rotation of the valve shaft. Is transmitted to the driven pulley through the endless belt, and the valve body opening indicator displays the opening according to the rotation of the endless belt together with the driven pulley.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a first embodiment of the present invention will be described with reference to the accompanying FIGS. In the figure, the same members as those shown in the prior art will be described using the same reference numerals. A T-shaped tube 3 composed of a straight tube portion 3a and a branching portion 3b is disposed at a pit 2 position formed at a required portion of the pipeline 1, and the adjusting short tube 4, the repair valve 5 and the fire hydrant are arranged on the T-shaped tube 3. 6 is sequentially arranged, and in the event of a fire, the opening / closing operation shaft 7 is rotated to open the fire hydrant 6 and a fire hydrant facility is provided for taking water from the discharge port 6a.
A valve shaft 8 is disposed across the T-shaped tube 3 at the intersection O between the axis of the straight tube portion 3a of the T-shaped tube 3 and the axis of the branching portion 3b perpendicular thereto. An elliptical valve body 9 for opening and closing the straight pipe portion 3a of the pipe 3 is fixed, and an operation shaft 11 of a rotation driving means 10 such as a worm gear is installed upright so that the rotation of the valve shaft 8 can be operated from the ground. Thus, a valve function is added so that the fluid in the straight pipe portion 3a is switched to the branching portion 3b side. Further, an opening degree display mechanism 20 for displaying the opening degree of the elliptical valve element 9 near the ground is provided on the valve shaft 8.
[0011]
As shown in FIG. 2, the opening degree display mechanism 20 has a wire attachment member 21 attached orthogonally and laterally to the protruding portion 8 a of the valve shaft 8, and a pair of guide pulleys 22 disposed above the wire attachment member 21 by a predetermined distance. Then, one end of the wire 23 is fixed to the distal end portion of the wire attachment member 21, and the middle is hooked on the pulley 22, and the other end is fixed to one end of the spring as the elastic body 24, and the other end of the spring 24 is the support member 26. An opening degree indicator 25 that is fixed to the support portion 26c of the casing and interlocked with the wire 23 is disposed on the upper portion of the pulley 22, and the wire attachment member 21, the pulley 22, the wire 23, and the opening degree indicator 25 are connected to the casing 26. It is housed inside.
[0012]
The wire attachment member 21 is attached in a direction perpendicular to the axis of the protrusion 8 a of the valve shaft 8. That is, the ring material 21a is externally fitted to the protruding portion 8a, the bolt 21b is screwed into the female screw 8b of the protruding portion 8a through the insertion hole 21c of the ring material 21a, and is fixed by the tightening nut 21d.
The guide pulley 22 is a pair and is rotatably attached to the upper part of the casing 26 by a support shaft 27, and the position thereof is close to the ground.
The casing 26 is a cylinder whose upper end is opened, and this cylinder is erected on the side of the gear box 12 of the rotation driving means 10 by a fixed plate 28. An insertion hole 26 a and a mounting hole 26 b for the protruding portion 8 a are provided on the lower side portion of the casing 26.
A pointer 25 a of the opening indicator 25 is fixed to the wire 23 between the pair of pulleys 22, and a display scale plate 25 b is disposed in the casing 26. 25c is a slit for projecting the pointer 25a formed on the scale plate 25b.
One end of the wire 23 is inserted into a small hole 21e provided at the tip of the bolt 21b, fixed by a fixing nut 21f, the other end is hung on the pulley 22, and then the spring 24 fixed to the reaction force support portion 26c of the casing 26. The wire 23 is always tensioned by the spring 24.
In addition, the distance from the protrusion part 14 of the wire 23 can be adjusted by adjusting the screwing amount of the bolt 21b to the internal thread 14a.
[0013]
In the above configuration, during normal water flow, the elliptical valve element 9 ensures a full flow rate in a fully open state opened in parallel with the flow path (see FIGS. 6A and 10). When it is necessary to discharge impurities from this state, when the valve shaft 8 is rotated in the clockwise direction, the elliptical valve element 9 is also rotated in the same direction, and the flow in the straight pipe portion 3a is changed to the elliptical valve element 9. (See FIGS. 6B and 11). As a result, the upstream running water communicates with the branch part 3b and completely blocks the other, so that heavy impurities and light and fine substances that flow while sinking near the bottom of the pipe 1 and the straight pipe part 3a in the running water. A small amount of foreign matter that has been rolled down in the middle and upper layers of the pipe flow in a suspended state enters the fire hydrant 6 through the branch portion 3b together with the flowing water, and the fire hydrant 6 that is opened by turning the opening / closing operation shaft 7 It discharges | emits through the hose (illustration omitted) from the discharge port 6a.
On the other hand, the wire attachment member 21 rotates with the rotation of the valve shaft 8 from the fully open state (the pointer 25a points to the middle of the scale plate 25b at this time), and the pointer 25a moves together with the wire 23. It moves horizontally between the pair of pulleys 22 to point to the fully closed position of the scale plate 25b, and the fully closed state of the elliptical valve element 9 can be confirmed from that position. When the flow in the straight pipe portion 3a is opposite to that in FIG. 10, the valve shaft 8 is rotated counterclockwise to block the flow path obliquely (see FIGS. 6 (c) and 12). , It is possible to discharge impurities.
As described above, the opening indicator 25 of the opening display mechanism 20 is disposed near the ground above the valve shaft 8 so that the opening state of the elliptical valve body 9 can be easily and accurately grasped visually. it can. In particular, the elliptical valve element 9 during normal water flow maintains a parallel state without inclination.
[0014]
FIG. 7 shows an opening degree display mechanism according to the second embodiment. The opening indication mechanism 40 is provided with a driving pulley 41 on the protruding portion 8 a of the valve shaft 8, an upper driven pulley 42 disposed at a predetermined distance from the driving pulley 41, and an endless belt 43 between the pulleys 41, 42. The opening indicator 45 is provided above the driven pulley 42. The driving pulley 41, the driven pulley 42, the endless belt 43, and the opening indicator 45 are accommodated in a casing (not shown) (same as the casing 26).
The driven pulley 42 is rotatably attached to the upper portion of the casing by a support shaft 47, but its position is close to the ground.
[0015]
The opening indicator 45 includes a pointer 45 a fixed to the endless belt 43 on the driven pulley 42 side and a display scale plate 45 b arranged above the driven pulley 42. The scale plate 45b has a slit 45c that is hollowed out. The slit 45c is fixed to the casing 46 by fitting the slit 45c from the upper part of the driven pulley 42, and protrudes so that a part of the circumference (about 90 °) of the driven pulley 42 can be seen. Let Both pulleys 41 and 42 have the same diameter and are rotated synchronously.
[0016]
In the above configuration, when the valve shaft 8 is rotated in the clockwise direction, the drive pulley 41 is rotated, and the endless belt 43 is moved along with this, and is rotated by the driven pulley 42 to rotate around. As the endless belt 43 rotates, the pointer 45a moves, and the opening degree of the elliptical valve element 9 can be confirmed by the position where the pointer 45a points to the scale plate 45a. Moreover, since the scale plate 45a is located near the ground, it can be easily and accurately confirmed visually.
The driving pulley 41 and the driven pulley 42 in the above embodiment use sprockets and use a belt with holes as the endless belt 43, so that no slip occurs between them and the rotational motion can be accurately transmitted. Any combination such as a timing belt may be used as long as it does not cause slipping.
[0017]
In the above-described embodiment, the straight tube portion 3a of the T-shaped tube 3 is provided with a receiving port at one end and an insertion port at the other end, and has a receiving port and an insertion port for a straight tube constituting the pipe 1. Since it is the same as the shape, it is easy to connect both pipes.
The wire attachment member 21 is preferably made of SUS material having corrosion resistance, but may be any material as long as it can withstand the tension of the wire 23.
The wire attachment member 21 and the wire 23 may be fixed by any method as long as an error such as play does not occur.
The wire attachment member 21 may be a pulley. In this case, one end of the wire 23 is fixed to the pulley.
The pulley 22 guides the wire 23, but is not particularly concerned with the pulley 22. If the material can also endure the load by the wire 23, it will not be specifically limited.
The lengths of the wire 23 and the endless belt 43 and the heights of the casings 26 and 46 are determined in accordance with the embedding state (depth) of the T-shaped tube 3.
The wire 23 is preferably a piano wire in order to change the rotational movement of the elliptical valve body 9 to a horizontal movement, and is preferably a corrosion-resistant SUS material, but any material can be used as long as it is less stretched by tension. Good. Similarly, the wire diameter is not particularly limited as long as elongation due to tension does not occur.
The spring 24 is preferably made of SUS material having corrosion resistance, but is not particularly limited as long as it does not cause permanent deformation due to the tension applied to the wire 23, and has a characteristic capable of continuously applying tension to the wire 23. As long as it has any specifications (wire diameter, spring constant, natural length), a coil spring other than the spring 24 or a rubber string may be used. Further, the diameter and length of the spring 24 are appropriately selected depending on the place where the T-shaped tube 3 is installed.
[0018]
The scale plates 25b and 45b are transparent, and the slits 25c and 45c can be omitted.
The casings 26 and 46 are cylindrical, support the pulleys 22, 41 and 42, and the function of the support frame for fixing the scale plates 25 b and 45 b and the respective members, the wires 23, the endless belt 43, and the opening indicators 25 and 45. However, if the protective function is not particularly required, a simple frame may be used.
The casings 26 and 46 use impact-resistant PVC pipes, but may be made of SUS material having corrosion resistance.
The fixing plates 28 and 48 are for attaching the casings 26 and 46 to the gear box 12 of the T-shaped tube 3. If the casings 26 and 46 and the gear box 12 can be fixed, the fixing plates 28 and 48 are attached to the fixing plate. The fixing method using a technique such as adhesion or welding may be used.
[0019]
【The invention's effect】
Since the present invention transmits the opening of the underground valve to the indicator on the ground with the wire or belt and pulley as described above, this type of T-tube with a valve function is sufficient. The opening position of the valve body can be easily confirmed with high accuracy, and the structure is also simple.
[Brief description of the drawings]
FIG. 1 is an overall partial cross-sectional front view according to an embodiment of the present invention. FIG. 2 shows an opening indication mechanism according to an embodiment of the present invention, in which (a) is a partially cutaway front view, and (b). FIG. 3 shows a wire attachment member according to an embodiment of the present invention, (a) is a front view, and (b) is a partially cut cross-sectional view. FIG. 4 is an embodiment of the present invention. FIG. 5 is a perspective view of a fixing plate according to an embodiment of the present invention. FIG. 6 is a conceptual diagram of an opening state according to the embodiment of the present invention, and FIG. (B) is a fully-closed state diagram, (c) is a fully-closed state diagram. FIG. 7 is a conceptual diagram of an opening indication mechanism according to another embodiment of the present invention. FIG. FIG. 9 shows a T-shaped tube according to a conventional example, (a) is a plan view, and (b) is a view taken along the line AA. FIG. 10 is a partially cut view showing a fully opened state according to the conventional example. Front view 11 is a partially cutaway front view showing a fully closed state according to a conventional example. FIG. 12 is a longitudinal sectional view showing a fully closed state according to a conventional example. FIG. 13 is a vertical cross section showing an intermediate opening state according to a conventional example. Figure [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Pipe line 2 Pit 3 T-shaped pipe 3a Straight pipe part 3b Branch part 4 Adjustment short pipe 5 Repair valve 6 Fire hydrant 6a Discharge port 7 Opening and closing operation shaft 8 Valve shaft 8a Protruding part 9 Oval valve body 10 Rotation drive means ( Worm gear)
11 Operation shaft 12 Gear box 13 Opening indicator 13a Pointer 13b Scale unit 20 Opening display mechanism 21 Wire mounting member 21a Ring material 21b Bolt 21c Insertion hole 21d Tightening nut 21e Small hole 21f Fixed nut 22 Guide pulley 23 Wire 24 Elasticity Body (spring)
25 Opening indicator 25a Pointer 25b Scale plate 25c Slit 26 Support member (casing)
26a Insertion hole 26b Mounting hole 26c Reaction force support portion 27 Support shaft 28 Fixed plate 40 Opening display mechanism 41 Driving pulley 42 Driven pulley 43 Endless belt 45 Opening indicator 45a Pointer 45b Scale plate 45c Slit 46 Support member (casing)
46a Insertion hole 46b Mounting hole 47 Support shaft 48 Fixing plate

Claims (2)

Via a valve shaft 8 that crosses the T-shaped tube at a branch portion between the straight tube portion 3a and the branched tube 3b of a T-shaped tube that is embedded in the ground and includes a branched tube 3b extending upward from the straight tube portion 3a. In the valve body opening indication device in the T-shaped tube with a valve function provided with a valve body 9 and provided with an opening indicator for displaying the opening degree of the valve body 9 ;
A wire attachment member 21 is attached to the protrusion 8a of the valve shaft 8 from the T-shaped tube so as to be orthogonal to the protrusion 8a and laterally, and a guide pulley 22 is placed near the ground at a predetermined distance above the wire attachment member 21. Provided, one end of the wire 23 is fixed to the distal end portion of the wire attaching member 21, the wire 23 is extended upward and hooked on the guide pulley 22, and the other end of the wire 23 is connected to the T-shaped via the elastic body 24. A pointer 25a that is locked to a casing 26 or a frame rising from the pipe and moves integrally with the wire 23 is attached to the wire 23 so as to be visible from above the T-shaped pipe, and the T-shape is attached to the upper part of the casing 26 or the frame. A scale plate 25b that can be seen from above the pipe is provided, and when the wire mounting member 21 rotates as the valve shaft 8 rotates, the wire 23 The pointer 25a moves in the same direction as the movement direction of the wire 23 along with the movement, and the opening state of the valve element 9 is determined by the position where the pointer 25a points to the scale plate 25b. valve opening degree display device in the valve function T-tube, characterized in that it comprises a position indicator gauge 25 to allow grasped visually from above the T-shaped pipe. Via a valve shaft 8 that crosses the T-shaped tube at a branch portion between the straight tube portion 3a and the branched tube 3b of a T-shaped tube that is embedded in the ground and includes a branched tube 3b extending upward from the straight tube portion 3a. In the valve body opening indication device in the T-shaped tube with a valve function provided with a valve body 9 and provided with an opening indicator for displaying the opening degree of the valve body 9 ;
A drive pulley 41 is attached to the protruding portion 8a of the valve shaft 8 from the T-shaped tube, and a driven pulley 42 is provided near the ground at a predetermined distance above the drive pulley 41, and the endless pulley is provided between the pulleys 41 and 42. A belt 45 is stretched over the endless belt 43, and a pointer 45a that moves integrally with the endless belt 43 is attached to the endless belt 43 so as to be visible from above the T-shaped tube. A scale plate 45b visible from above the character tube is provided. When the drive pulley 41 rotates as the valve shaft 8 rotates, the endless belt 43 moves in the length direction thereof, and the pointer 45a moves with the movement. Moves in the same direction as the moving direction of the endless belt 43, and the degree of opening of the valve element 9 is determined by the position of the pointer 45a pointing to the scale plate 45b. Valve opening degree display device in the valve function T-tube, characterized in that it comprises a position indicator gauge 45 to allow grasped visually from above of the tube.

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