JP2003042336A - Valve opening meter and gate opening meter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dry battery drive type valve opening meter and a dry battery type gate opening meter capable of accurately displaying the opening with digital display in hand even under the hard environment condition having a probability of being submerged. SOLUTION: An opening detecting means formed of a first gear 17 fixed to a vertical shaft 14 connected to a valve rod of a valve, a second gear 18 to be rotated around the rotation axis of a potentiometer 19 geared with the first gear 17, the potentiometer 19 and an electric signal cord 21 is sealed in a waterproof housing 11 having the waterproof sealed box structure. The waterproof housing 11 is fixed to the inner wall of an embedded pipe 4 or a valve body by a vibration stopper fitting 12. An opening detecting unit 22 and an opening display unit for displaying the number of revolution in hand are perfectly separated from each other. They are connected to each other through the electric signal cord 21 to transmit the opening to the opening display unit.

Description

Detailed Description of the Invention

[0001]

The present invention relates to water and sewerage, industrial water,
A battery-operated valve opening meter that electrically detects the number of rotations from the fully closed state of valves and gates installed in agricultural drainage and digitally displays the opening, and the number of rotations from the fully closed state is electrically detected. The present invention relates to a battery-driven gate opening meter that digitally displays the opening distance.

[0002]

2. Description of the Related Art Water and sewage buried underground, industrial water,
Many valves are installed at key points in the agricultural water pipeline. Among them, agricultural water has a low water pressure and a large amount of water to be sent. Has been carefully managed. Also,
Originally, water management for work water did not need to be controlled due to the high water pressure in the pipe, but due to the recent chronic water shortage, there have been many opportunities to regulate water flow by valves. In the abnormal drought of 1994, it is a new memory to remember that it was difficult to open and close the valves in all departments of water for construction work and agricultural water.

Above all, in the agricultural pipeline,
A sluice valve is normally used for a diameter of 350 mm or less, but since it does not have an opening meter, a water manager called "water number" once fully closes the valve to count the number of revolutions and reopen the valve opening. Since it is set, the labor burden of visiting many points and making adjustments is very large. In addition, the butterfly valve used for caliber of 400 mm or more has a simple opening meter with an arrow that slides on the scale plate attached to the valve body, but the valve is installed below a pitch-black pit or manhole. Since the scale plate is not visible, mud water is often stored in the pits and manholes, so the existing opening gauge is not functioning at all.

In addition, in the land improvement area where agricultural water is managed, the area of farmland is decreasing due to urbanization, but due to the phenomenon of sprawl, it is not possible to stop the water supply even with a water pipe line having only one or two brushes. , The length of the managed route remains unchanged. However, the number of staff in the land improvement zone has been reduced, the population is aging, and the number of times of laborious and difficult valve opening and closing operations has been reduced, resulting in insufficient water management.

A specific method of opening and closing the valve will be described with reference to the case of FIG. 7. When the T-shaped handle 7 is inserted into the cap 2 at the upper end of the valve 1 buried in the ground and rotated, the valve rod in the valve is opened. The valve body moves up and down via 9 to adjust and control the water supply amount of the pipeline 3. Pipeline 3
Is usually buried under a road of 1.2 m under the road and 0.6 m under the cultivated ground, and the position of the cap 2 becomes deep. Therefore, the extension rod 8 is connected to the cap 2 to extend the extension rod cap 29 to the ground surface. It's getting close up. The buried valve 1 is usually protected by a buried pipe 4 using a fume pipe, and the ground surface above it is closed by a manhole cover 6.

The shape of the cap 2 of the valve 1 is a convex shape of a quadrangular pyramid, and the lower end of the T-shaped handle 7 is a concave type so that it can be inserted. The T-shaped handle is turned to open / close the valve. The rotation speed of the sluice valve from fully closed to fully open is
With a diameter of 350 mm, it has about 36 rotations and an operating torque of 4
It reaches 0 kgf-m.

[0007]

As described above, it is an important task to set the valve opening to control the flow rate in water management. -15808 "Opening gauge of valve device", Japanese Patent Application No. 7-12
0930 "Opening gauge of valve device", JP-A-3-103686
As can be seen in "Valve Opening Gauge", Japanese Patent Publication No. 1-58391 "Opening Gauge for Valve Opener", and Japanese Patent Publication No. 55-10796 "Valve Opening / Closed Valve Opening Indicator". The indicator needle moves on the scale plate by the rotation of the valve rod, or the scale plate is rotated by the gear ratio of the gear with respect to the indicator needle, and the movement width is small and inaccurate.

Therefore, in the pit or manhole where the valve is installed, it is dark and cannot be visually inspected, and the opening meter is often below the surface of the muddy water. , There was a defect that the gear inside the scale plate got stuck and mud stopped working.

That is, whether the indicator needle moves on the scale plate,
In the conventional valve opening meter in which the scale plate rotates with respect to the indicator needle, the movement range is small and inaccurate, it is dark and invisible in the pit or manhole where the valve is installed, and the scale becomes below the surface of the muddy water. There was a defect that not only could the soil be accumulated on the plate and not be readable, but also the gear inside the scale plate could become inoperable due to the inclusion of mud.

On the other hand, water intake and drainage are performed by opening and closing the gate, and the flow rate control is also controlled by the opening of the gate, and the projection amount of the external screw, spindle rod and rack rod at the installation site can be visually observed. Visually check the gate opening. However, in the far operation room, a gate opening meter with a gate having an internal screw / spindle bar in a place that cannot be projected, such as in a manhole, or a gate hoist installed on-site in a river or drainage channel There are many demands for an inexpensive and accurate gate opening meter for electric control,
Commercially available gate opening meters are expensive and inaccurate.

That is, most gate opening meters for remote instruction are of synchro (celsin) type and potentiometer type, and the rotation number of a spindle type, rack type or wire rope type hoisting machine is adjusted to 270 ° by a speed reducer. It is converted to angular fluctuation and the electrical output of the Celsine or potentiometer is displayed as the gate opening.However, since the fluctuation amount of the rotational speed is dropped multiple times to reduce it, the backlash in the reducer (the meshing teeth (Play) causes an error, and it is impossible to measure with an accuracy of mm order required in actual water management control. In addition, the gates installed in the manhole store muddy water, and the gates installed on-site in rivers and drainage channels may be submerged by heavy rain, which can withstand use under harsh environmental conditions. A meter is required, but I can't find it.

In addition, the current gate opening meter is, for example, 0 to
There are many types that display an opening distance of 3 m in an analog display of 0 to 100%, and a type that displays a digital display of 0 to 3000 mm is expensive. FIG. 8 shows a display unit of a conventional remote opening degree meter, which divides a fluctuation range of 270 ° into 0 to 100% opening degree, and the accuracy is rough.

[0013]

In order to solve the above-mentioned problems, the valve opening meter and the gate opening meter of the present invention have the following configurations. (Refer to FIGS. 1 to 7 for the reference numerals) The valve opening meter of the present invention is driven by a battery, and an opening detecting means is closed in a waterproof hermetically sealed box structure. Degree detection unit 22 and opening indicator 3 for digitally displaying the number of rotations of the valve at hand
1 is completely separated, and the two are connected by the electric signal cord 21 and the waterproof connector 28.

The opening detecting section 22 has an integral structure in which the waterproof housing 11 containing the opening detecting means is fixed to the steady fitting 12 by a fixing bolt 13, and the steady fitting 12 holding the extension rod is fixed. The valve 1 is fixed to the inner wall of the buried pipe 4 which is protected by the adjusting bolt 24.
However, since the extension rod is slightly displaced from the center of the embedded pipe 4, the attachment position is adjusted by the fixing adjustment bolt 24 and fixed.

The valve opening degree electrically detects the number of revolutions of the valve rod 9 that opens and closes the valve or the extension rod that is fitted in the cap 2 at the upper end of the valve rod and connected to the upper side from the fully closed state. The waterproof housing 11 includes a first gear 17 fixed on the circumference of the valve rod 9 or an extension rod, and a second gear 1 having a rotary shaft of a potentiometer 19 meshing with the first gear as a central axis.
8, potentiometer 19 body, its electrical signal code 2
1 is enclosed in a watertight closed box, and the total number of revolutions that can be displayed is determined by the gear ratio between the first gear 17 and the second gear 18. The valve rod 9 or the extension rod which penetrates the waterproof housing 11 and is rotatable is the waterproof housing 1.
Watertightness is maintained through 1 and the O-ring 16.

The opening detection sensor is a potentiometer 19
However, a rotary encoder can also be used, and the opening detection means is constituted by the gear and the opening detection sensor. Further, although the rotation of the valve rod 9 or the extension rod is transmitted by a gear, a pulley may be used, and a belt may be wound around the first pulley and the second pulley to interlock with each other, and the opening detection sensor and the opening detection means may be used. The structure that constitutes

The waterproof housing 11 has a built-in opening detecting means, and has a watertight structure with the valve rod 9 or the extension rod rotatably passing therethrough via an O-ring 16 so as to be integrated with the steady rest. Although the opening degree detecting portion is configured, the valve rod 9 or the extension rod is long, whereas the diameter of the buried pipe 4 for protecting the valve is small, which is inconvenient to attach to the existing valve.

Therefore, in the newly installed valve, the valve rod 11
The waterproof housing 11 for detecting the number of rotations is attached integrally with the casing of the valve, or is fixed to the casing and a valve opening meter is attached from the beginning. In addition, the existing valve can be used by inserting the short joint shaft 14 with an uneven joint in the middle of the extension rod, and inserting the opening degree detection unit 22 having a waterproof structure into the joint shaft 14 through the O-ring 16 as a buried pipe. Fix at 4. That is, the extension rod 8 is divided into the extension rod upper portion 27 and the extension rod lower portion 26 and the joint shaft 14 is inserted therein.

As a result, the opening degree detecting section 22 in which the waterproof housing 11 having the short joint shaft 14 and the steady rest 12 are integrally structured, the embedded pipe 4 for protecting the valve.
And small diameter manhole cover 6 that closes the ground surface above it
It can be inserted into and taken out of (normal diameter 150 mm), the opening detection unit 22 can be easily fixed to the buried pipe 4, and a valve opening meter can be installed regardless of new or existing valves.

As another opening detecting means, a bar code or a magnetic scale is attached on the circumference of the valve rod 9 or the extension rod 8 so that the bar rod 9 or the extension rod 8 does not contact the bar code reader or the magnetic scale. A waterproof structure in which the scale reader main body and its electric signal cord 21 are enclosed in the waterproof housing 11 can also be adopted.

The electric signal of the opening detection sensor is extracted by the electric signal code 21 and connected to the opening indicator 31 via the waterproof connector 28. The opening degree indicator 31 does not need to be always installed and is carried around. Since the opening indicator 31 is common, the water manager only needs to carry one, which is very economical. That is, only the opening degree detection unit 22 is attached to many valve installation locations, and one opening degree display 31 is carried to adjust the opening degree of the valve to make a patrol.

The opening obtained by the opening detecting means may be once relayed to the wireless tag via the electric signal code and then sent to the reader / writer. In this case, remote monitoring is also possible.

On the other hand, the gate opening meter of the present invention is of a battery driven type, and in a spindle type, rack type, wire rope type, etc. gate, a bevel gear that meshes with the inner screw / spindle rod and the outer screw / spindle rod for opening / closing the gate. (Manual), worm gear (electric), spur gears that mesh with rack rods, drum drums that wind ropes, etc. Enclosed in a sealed waterproof housing,
The rotary sliding parts of various rotatable gear shafts that penetrate the waterproof housing and are rotatable are kept watertight through O-rings.
The opening detection part that is fixed to the gate body frame by the steady rest is completely separated from the opening indicator that converts the number of rotations into the opening distance and digitally displays it at hand, and the both are an electric signal cord and a waterproof connector. It was composed by connecting with.

[0024]

DETAILED DESCRIPTION OF THE INVENTION

First Embodiment FIGS. 1 and 2 are a front view and a plan view of an opening degree detection unit 22 which is a main part of the present invention, and a partial cross section is also drawn. The waterproof housing 11 and the mounting bracket 12 are fastened with a fixing bolt 13 to form an integral structure. The joint shaft 14 penetrates the waterproof housing 11 in the vertical direction, and the rotary sliding portion of the joint shaft 14 is O.
Sealed by ring 16, waterproof housing 1
Watertightness is maintained in 1 and water does not enter.

The waterproof housing 11 includes a joint shaft 14
A first gear 17 fixed on the circumference of the second gear, and a second shaft having a rotation axis of a potentiometer 19 meshing with the first gear 17 as a central axis.
The gear 18, the potentiometer 19 main body, and the electric signal cord 21 thereof are enclosed in a waterproof hermetically sealed box, and the total number of revolutions that can be displayed is determined by the gear ratio between the first gear 17 and the second gear 18. There is.

Waterproof housing 1 with a short joint shaft
Opening degree detection unit 2 in which 1 and steady rest 12 are integrated
2 is a buried pipe 4 that protects the valve and a small-diameter manhole cover 6 that closes the ground surface above it (usually a diameter of 150 m
It can be easily inserted into and removed from m) and can be easily fixed to the buried pipe 4.

The opening detecting section 22 is attached by fixing fixing bolt mounting plates 23 which are concentric with the buried pipe 4 at both ends of the steady rest 12, and as shown in FIG. The connecting shaft 14 is pressed against the inner wall of the buried pipe 4 and inserted into the extension rod lower portion 26 connecting to the valve stem of the valve.

The joint shaft 14 has a lower extension rod 26.
And the extension rod upper part 27 are connected by a concave and convex joint, and when they are fitted tightly, when the extension rod upper part 27 is rotated, the extension rod lower part 26 and the valve rod 9 are connected via the joint shaft 14. Rotate to open and close the valve.

In FIGS. 3 and 4, the valve 1 buried in the ground
It is a front view showing a procedure for attaching the opening degree detection unit 22 to the. First, the manhole cover 6 is opened, the extension rod lower part 26 is fitted into the cap 2 at the upper end of the valve rod of the valve, the connecting shaft 14 fixed to the opening degree detecting part 22 is connected thereto, and the steady rest 12 is fixed. It is fixed to the inner wall of the buried pipe 4 by the adjusting bolt 24. Since the opening degree detection unit 22 has a horizontally long shape, it can be inserted into the narrow manhole cover 6 or the buried pipe 4 by inserting it at an angle as shown in FIG. 3a. Further, at the upper end of the joint shaft, an extension rod cap 29
Connect the extension rod upper part 27 marked with.

In this embodiment, the extension rod upper portion 27 is used, but it is simpler to provide the extension rod cap 29 directly on the upper end of the joint shaft 14 to form an integrated structure.

As for the valve opening, as shown in FIG. 5, the opening indicator 3 is provided on the waterproof connector hooked on the manhole cover 6.
By inserting the signal code 21 from 1 and pressing the switch button, it is digitally displayed with a resolution of 1/10 rotation and the power is automatically turned off after 1 minute. Although a detailed description of the opening indicator 31 is omitted, it has a dry battery power supply, a calculation unit, a display unit, and the like, and is pocket-sized and lightweight for convenient carrying.

The total number of revolutions of the opening indicator of the present embodiment is 10 times the gear ratio of the first gear and the second gear, a potentiometer of 10 revolutions is used, and the play at the deadline is 0. It takes 5 rotations, so it's 105.0 x 95.0
The rotation is the total number of rotations. The opening indicator was built-in with four AA batteries and was a digital display with a resolution of 0.1 rotation, which was a saving type that disappeared after 1 minute. The above is the description of claim 3 of the present invention.

[0033]

[Embodiment 2] FIG. 6 is an example in which the valve opening is remotely monitored, and an electric signal from the opening detector 22 is connected to the wireless tag 32. The wireless tag 32 is a passive type that does not require a driving battery and operates with high frequency power received from an external reader / writer 33. Further, the electric signal of the opening detection sensor and the number information unique to the opening detection sensor are issued to the read / write 33. Therefore, the water manager can know the valve opening information without connecting the opening indicator 31 to the valve.

As for how to use the reed liter 33, a water manager carries the reed liter 33 and circulates in the vicinity of a number of valves to read valve opening information, and circulates only the places where valve adjustment is necessary.

In the first and second embodiments, the potentiometer 19 is used as the opening detection sensor. However, even if a rotary encoder is used, the measurement can be performed with the same or higher accuracy, and two gears are used as the rotation transmission means. However, it may be composed of two pulleys and a belt connecting them. in this case,
The total number of revolutions that can be displayed is determined by changing the number of teeth on the pulley and adjusting the transmission ratio.

In the embodiment, the opening degree detection unit in which the waterproof housing 11 incorporating the rotation speed detection means and the steady rest metal fitting 12 are integrated is fixed to the underground buried pipe 4 to display the valve opening degree. However, it is possible to provide a valve with an opening meter in which the waterproof housing 11 is integrated with the casing of the valve 1 or fixed to the valve 1 main body from the beginning. In this case, the waterproof housing is passed through the valve rod 9 of the valve 1.

[0037]

[Third Embodiment] Although there are spindle type, rack type, wire rope type, etc. gates, bevel gears (manual), worm gears (electric), rack rods that mesh with the inner screw / spindle rod, outer screw / spindle rod that opens and closes the gate. For various types of rotary gear shafts such as spur gears that mesh with each other, drums that wind rope, etc., the opening degree detection means that electrically detects the number of rotations from fully closed is enclosed in a waterproof housing with a waterproof and sealed structure for waterproofing. The rotary sliding parts of various rotatable gear shafts that penetrate the housing and are freely rotatable maintain watertightness via O-rings, and the opening detection part that is fixed to the gate body frame by the steady rest metal fittings and the number of rotations at hand. Is completely separated from the opening indicator that converts the value into the opening distance and digitally displays it, and connects them with an electric signal cord and a waterproof connector. You configure the door open meter.

FIG. 7A shows an embodiment in which the opening detecting portion 11a having a waterproof and sealed box structure is directly attached to the rotary shaft of the hoisting machine in the spindle type and rack type gates and fixed to the gate body frame 35. is there. In addition, in the spindle type gate, the opening detection part is directly attached to the inner screw and the spindle rod, and the pitch of the trapezoidal screw of the spindle is always 10 m.
If m, 1.0 rotation display becomes 1.0 cm, and the conversion circuit can be omitted. Similarly, if the spur gear that meshes with a 10 mm variation of the rack rod is rotated once, the conversion circuit can be omitted. FIG. 7B shows an embodiment in which a wire rope type gate is provided with an opening detection section 11b directly attached to the drum shaft for winding the rope and fixed to the gate body frame.

[0039]

The valve opening meter and the gate opening meter of the present invention have the following effects. (1) In a valve, the number of rotations of a valve rod or an extension rod connected to the valve rod is directly measured, while a spindle type, rack type,
In the wire rope type gate, bevel gears (manual) and worm gears (manual) that mesh with the inner screw / spindle rod, outer screw / spindle rod that winds the gate, spur gears that mesh with the rack rod, and various rotary gears for drums that wind the rope. Since the number of rotations of the rod is directly measured and displayed in terms of the opening distance, there is almost no error caused by backlash in the conventional speed reducer, and there is a precision digital display with a resolution of 0.1 rotation or 1 mm. The opening can be obtained. Thereby, the accurate valve opening and gate opening in water management can be set.

(2) Since the opening degree detecting means is enclosed in the waterproof housing having the waterproof closed box structure, even if muddy water is stored in the pit or manhole where the valve or gate is installed, it can be protected from heavy rain during downpour. Since it operates without trouble even under such a bad environment, sufficient reliability of the position gauge can be secured.

(3) The measurement is a simple operation by simply inserting the connector of the opening indicator into the waterproof connector from the opening detector and pressing the switch button, and electrically measuring the opening of the valve or gate. Since the opening detecting section and the opening indicator are completely separated from each other, the opening digitally displayed on the opening indicator at hand can be definitely read.

(4) Since the opening display instantly shows the current opening, it suffices to open and close to the target set opening.
Conventionally, the labor of once closing the valve and the gate and setting the opening again can be greatly saved, and there is no mistake in counting.

(5) Although an opening detection unit is attached to a large number of valves and gates, since the opening display is common, it is sufficient for the water manager to carry one opening display unit. Be economical.

(6) Since it is driven by dry batteries, it can be installed anywhere. The opening indicator with a built-in dry battery is a power-saving handy type display that disappears automatically after 1 minute.

(7) The opening degree obtained by the opening degree detecting means can be relayed to the wireless tag and transmitted to the reader / writer, which enables remote monitoring.

(8) The opening detecting portion of the valve opening meter can be easily inserted in the middle of the extension rod of the valve and has a diameter of 150 m.
Since it can be inserted from the m manhole cover and easily fixed to the buried pipe, it can be easily attached to all valves regardless of existing or new installation. Further, the opening degree detection unit of the gate opening degree meter is not inserted into the speed reducer but is directly attached to various rotary gear shafts that wind up the gate and fixed to the gate main body frame, so that it can be easily installed.

[Brief description of drawings]

FIG. 1 is a front view (partially cross-sectional view) of an opening detection unit in a valve opening meter of the present invention.

FIG. 2 is a plan view (partial cross section) of an opening degree detection unit in the valve opening degree meter of the present invention.

FIG. 3 is a front view (a), (b) showing a procedure for setting an opening detection unit in the valve opening meter of the present invention to an existing valve.

FIG. 4 is a front view of setting a T-shaped handle in the valve opening meter of the present invention (c), and a front view of connecting an opening indicator of the valve opening meter of the present invention (d).

FIG. 5 is a front view showing an opening degree display section when the opening degree detection section of the valve opening meter of the present invention is set in the buried pipe and the manhole cover is closed.

FIG. 6 is a schematic diagram of a system that wirelessly transmits a valve opening degree.

FIG. 7 (a) Schematic diagram of installation of an opening degree detection unit in a spindle type and rack type gate (b) Schematic diagram of attachment of an opening degree detection unit in a wire rope type gate

FIG. 8 is a buried front view of a conventional sluice valve.

FIG. 9 is a view showing a display portion of a conventional gate opening meter.

[Explanation of symbols]

1 valve 2 cap 3 pipelines 4 buried pipe 6 manhole cover 7 T-shaped handle 8 extension rod 9 valve rod 11, 11a, 11b Waterproof housing 12, 12a, 12b steady rest 13 Fixing bolt 14 Joint shaft 16 O-ring 17 First gear 18 2nd gear 19 Potentiometer 21 Electric signal code 22 Opening detector 23 Fixing adjustment bolt mounting plate 24 Fixed adjustment bolt 26 Extension rod bottom 27 Extension rod top 28 Waterproof connector 29 Extension rod cap 31 Opening indicator 32 wireless tag 33 read writer 34 Spindle rod or rack rod 35 gate body frame 36 gate door body 37 electric motor 38 Cyclo (registered trademark) reducer 39 spur gears 40 drum gear 41 drums

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Masanori Sakakibara             440-19 Kiln-cho, Seto City F-term (reference) 3H065 BA02 BA07 BB12 BC02

Claims (6)

[Claims] 1. An opening for electrically detecting the number of rotations of the valve rod or the extension rod from the fully closed state with respect to a valve rod for opening and closing the valve or an extension rod fitted and connected to a cap at the upper end of the valve rod. The detection means is enclosed in a waterproof housing with a waterproof sealed box structure, and the valve body or the inner wall of the buried pipe that protects the buried valve is fixed by an opening detection part that secures the waterproof housing with a steady rest. A dry battery driven valve opening meter that is completely separated from the opening indicator that displays the number of revolutions and is connected by an electrical signal cord and a waterproof connector. 2. A first gear fixed on the circumference of a valve rod or an extension rod, a second gear having a rotary shaft of a potentiometer meshing with the first gear as a central axis, a potentiometer, and an electric signal code. The opening detecting means is enclosed in a waterproof housing having a waterproof closed box structure, penetrates the waterproof housing, and the rotatable sliding portion of the freely rotatable valve rod or extension rod maintains watertightness through an O-ring. In the opening detection part that fixes the waterproof housing with the steady rest, the first
The valve opening degree meter according to claim 1, wherein the total number of revolutions that can be displayed is determined by the gear ratio between the gear and the second gear. 3. When inserting a short joint shaft with an uneven joint or the like into the middle of an extension rod fitted and connected to a cap on the upper end of a valve rod of an existing buried valve, it penetrates through the waterproof housing and is rotatable. A watertight housing that maintains watertightness is fixed to the buried pipe with an O-ring at the rotary sliding part of the relay shaft. The valve opening meter according to claim 1, which has a structured opening detection section. 4. The steadying metal fitting of the opening detecting portion fixed to the inner wall of the buried pipe for protecting the buried valve has a valve stem of the valve slightly displaced from the center of the buried pipe, and is therefore waterproof with respect to the connecting shaft. 2. The valve opening according to claim 1, wherein adjustment bolts are attached to both ends of a steadying metal fitting integrated with the housing to adjust the position, and the insertion and removal can be performed from a small-diameter manhole cover on the upper part of the buried pipe. Total. 5. The opening obtained by the opening detecting means is
2. The wireless tag is once relayed via the electric signal code, and then transmitted to the reader / writer.
The valve position gauge described. 6. A spindle-type, rack-type, wire-rope-type gate, etc., in which a bevel gear or worm gear meshing with the inner screw / spindle rod, the outer screw / spindle rod for opening / closing the gate, a spur gear meshing with the rack rod, or a rope is wound. Opening detection means that electrically detects the number of rotations from fully closed for various rotating gear shafts such as a drum is enclosed in a waterproof housing with a waterproof sealed structure, penetrates the waterproof housing, and is freely rotatable. The rotary sliding portion of each of the various rotary gear shafts is kept watertight through an O-ring and is fixed to the main frame of the gate by a steady rest, and the opening detection unit according to claim 2 and the rotational speed at the opening. A battery-powered battery-powered game that is completely separated from the opening indicator that converts into a distance and digitally displays, and connects both with an electric signal cord and a waterproof connector. Opening meter.