JP2000088137A - Gate valve with opening sensor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To discriminate the opening closing states of a valve in short time, even if the opening closing operations of the valve are actually performed, and to facilitate a flow rate control of a conduit, by constituting the valve so that the opening/closing states of the valve may be detected by a sensor and an action member provided on a valve box a valve element and the opening/closing states may be transmitted to the outside. SOLUTION: When a partition valve 1 is in a full close state, an action member 8a provided on the side of a valve element 3 and a sensor 7a provided on the side of a valve box 2 are opposed and the sensor 7a becomes a state of the presence of reaction. Since a second action member 8b provided on the side of the valve element 3 and a second sensor 7b provided on the side of the valve box 2 are not opposed, the sensor 7b becomes a state of the absence of reaction. Since both of the action members 8a, 8b are not opposed to the sensors 7a, 7b in the case of a half-open state, both of the sensors 7a, 7b become states of the absence of reaction. Therefore, output signals of these sensors 7a, 7b are imputted in a portable transmitter-receiver together with discriminating symbols of the valve element 3, and the valve opening/closing state is discriminated in the transmitter-receiver.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a gate valve with an opening sensor.

[0002]

2. Description of the Related Art In a water supply system, a gate valve is disposed at an important part of a pipeline in order to supply the amount of water in the pipeline in accordance with demand without excess or deficiency.

[0003] Incidentally, in the above-mentioned pipeline, it is necessary to grasp the open / closed state of a gate valve arranged at a key point in the pipeline for hydraulic control, water quality control and flow rate control.

[0004]

In a gate valve operated by fitting a key handle to a cap when determining the opening of the valve, the opening cannot be determined only by visual inspection of the cap. In such a case, the cap was actually rotated by using a key handle, and the valve was opened and closed to confirm each one.

[0005] Therefore, there is a problem that the work of confirming the opening of each valve for controlling the flow rate is very troublesome. The present invention
An object of the present invention is to provide a gate valve with an opening sensor that can easily determine the opening degrees of a large number of gate valves arranged along a pipe and thus can easily control the flow rate.

[0006]

A gate valve with an opening sensor according to the present invention is provided with a sensor for sensing a valve element at a fully open position and a fully closed position of a valve box. The sensor is provided with a circuit for transmitting the sensing state of the valve body to the outside together with the identification code of the valve body.

According to the present invention, the opening / closing state of the valve can be immediately known by transmitting the opening state of the valve body without actually opening / closing the valve, and it is very easy to check the opening degree. It becomes possible, and water volume management becomes easy.

[0008]

Next, an embodiment of the present invention will be described. FIG. 1 is a front sectional view of a gate valve with an opening sensor according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along line XX of FIG.

1 and 2, reference numeral 1 denotes a gate valve, and a valve body 3 is supported by a valve box 2 so as to block a flow path 4 and slide vertically, and is formed at a tip end of a valve rod 5. The opening degree is adjusted by fitting and rotating a key handle 6a (FIG. 4) to the cap 6 that has been set.
Reference numerals 7a and 7b (hereinafter, generally referred to as 7) denote sensors arranged at a fully open position and a fully closed position of the valve box 2, and are arranged to detect the valve element 3. Reference numerals 8a and 8b (hereinafter collectively referred to as 8) denote operation members for the sensor 7 provided on the valve body 3;
Is fully closed, the sensor 7a and the operating member 8
b is installed so as to face the sensor 7b when the valve body 3 is fully opened.

The sensor 7 and the operating member 8 are, for example, a combination of a magnetic sensor 7 and a permanent magnet 8 or a combination of a limit switch 7 and a contact 8. The combination of the former magnetic sensor and permanent magnet is preferable from the viewpoint of operating without malfunction in the fluid.

Reference numeral 9 denotes a transmitting circuit, and an ID chip or the like is preferably used. Reference numeral 10 denotes an antenna coil, which performs reception from outside and transmission from the valve 1 to outside.

When the ID chip 9 is used, the operating energy of the circuit can be obtained by electromagnetic induction of radio waves received from the outside, so that it can be operated without batteries and without power.

Next, the operation of the above embodiment will be described. First, the relationship between the opening degree of the valve body 3 and the sensor 7 will be described. FIG.
3A and 3B are cross-sectional views of a main part for explaining the relationship between the valve body 3 and the sensor 7, wherein FIG. 3A shows a fully closed state, FIG. 3B shows a half open state, and FIG.

[0014] As shown in FIG.
Since the operating member 8a of the valve body 3 and the sensor 7a of the valve box 2 face each other, the sensor 7a responds and the operating member 8b of the valve body 3
And the sensor 7b of the valve box 2 do not face each other.
Has no response.

As shown in FIG. 3B, in the case of the half-open state,
Since none of the action members 8a, 8b of the valve body 3 face the sensors 7a, 7b of the valve box 2, both the sensors 7a, 7b
Do not react together.

In the case of the fully opened state as shown in FIG. 3 (c), the operating member 8b of the valve body 3 and the sensor 7b of the valve box 2
Are opposed to each other, and the operating member 8a of the valve body 3 and the sensor 7 of the valve box 2
Since the sensor 7a does not face the sensor a, the sensor 7b reacts and the sensor 7a does not react.

Table 1 summarizes these.

[0018]

[Table 1]

Then, as shown in FIG.
If a signal radio wave is emitted from the supported transmitter / receiver 11 toward the antenna coil 10, information indicating the presence or absence of the response of the sensor is transmitted together with the identification code of the valve body 1 in response to this signal, and transmitted to the transmitter / receiver 11. Any one of the above three types of information is returned, whereby the open / closed state of the valve is immediately determined.

At this time, if the reception and transmission circuit of the valve 1 is an ID chip, information can be transmitted using the electromotive force obtained by the electromagnetic induction by the radio wave as a power source.
No battery or utility power is required. For this reason, there is no limitation on the use period and the reliability can be improved.

[0021]

As described above, according to the present invention, the open / closed state of the valve is detected by the sensor and the operating member provided on the valve box and the valve body and transmitted to the outside, so that the open / closed state of the valve is determined by the valve. Can be determined in a short time without actually performing the opening and closing operations, and the flow rate of the pipeline can be easily controlled.

When an electromagnetic sensor and a permanent magnet are used as the valved opening / closing sensor and an ID chip is used as the transmitting circuit, the electromagnetic wave can be transmitted using the electromagnetic wave induced by the radio wave received by the antenna coil. Therefore, there is an effect that maintenance for a power supply or the like is not required at all.

[Brief description of the drawings]

FIG. 1 is a front sectional view of a gate valve with an opening sensor according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line XX of FIG.

3A and 3B are explanatory views of the operation of the gate valve with the opening sensor according to the embodiment of the present invention, wherein FIG. 3A is a main part showing a fully closed state of the valve, FIG. 3B is a half open state, and FIG. It is sectional drawing.

FIG. 4 is an explanatory view of a use state of a gate valve with an opening sensor according to the present invention.

[Explanation of symbols]

 Reference Signs List 1 valve 2 valve box 3 valve element 4 flow path 5 valve stem 6 cap 7a lower sensor (magnetic sensor) 7b upper sensor (same as above) 8a lower operating member (permanent magnet) 8b upper operating member (permanent magnet) 9 transmission circuit ( ID chip) 10 Antenna coil

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Shinsuke Kishida 2-26-2 Ohama-cho, Amagasaki-shi, Hyogo F-term in Kubota Mukogawa Works (reference) 3H065 AA03 BA01 BA07 BB14 BC02 BC05

Claims (1)

[Claims] 1. A sensor for sensing a valve body is disposed at a fully open position and a fully closed position of a valve box, and an action member responsive to the sensor is attached to the valve body, and the sensor is provided for sensing the valve body. A gate valve with an opening sensor provided with a circuit for transmitting the state to the outside together with the identification code of the valve body.