JPH022124Y2 - - Google Patents

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a valve having a function of detecting fluid flow.

"Prior Art" Generally, water pipes are equipped with valves such as gate valves at appropriate positions, and the fluid (water) passing through the pipes is
control.

By the way, if it becomes necessary to newly install a current meter or flowmeter to detect the state of fluid flow in the existing water piping configured as described above, it is necessary to install a hole in the existing water piping. They either open it up and insert a meter, or replace it with a new water pipe with a meter installed.

``Problems to be solved by the invention'' However, when installing a current meter or flowmeter to water pipes as described above, construction work such as drilling holes in the water pipes or replacing the pipes is not easy, and There is a problem in that the cost is high.

This invention was made in view of the above circumstances,
The purpose of this design is to make it possible to easily install a flowmeter, etc. that detects the flow of fluid into existing water piping, to make maintenance and inspection of the flowmeter, etc. easy, and to have a valve that has a function to prevent water hammer. Our goal is to provide the following.

"Means for Solving the Problems" In order to achieve the above object, the present invention provides an opening/closing mechanism for opening and closing the water passageway in a valve box having pipe connection flanges at both ends of the water passageway. A communication pipe equipped with a lid member is provided between one of the pipe connection flanges and the opening/closing mechanism, and is provided integrally with the valve box so as to open into the water passageway and protrude upward. A flow sensor such as a flow meter is inserted through the communication pipe.

"Operation" When the opening/closing mechanism is operated to open the valve box, fluid flows through the water passage. At this time, the flow detection body operates according to the flow of the fluid, and a flow meter or the like detects the flow of the fluid flowing through the water passage, that is, the flow rate, etc. from the movement of the flow detection body.

Since the communication pipe is provided in the valve box so as to protrude upward, the flow of fluid can be stopped by closing the opening/closing mechanism on the upstream side, and the flow meter etc. can be easily inspected. Furthermore, by forming an air layer above the communication pipe, water hammer that occurs when the opening/closing mechanism is suddenly closed can be alleviated.

"Example" Hereinafter, the first example of the present invention shown in Figures 1 to 4 will be described.
Examples will be specifically described.

FIG. 1 is a partially cross-sectional view of a valve B according to the present invention, which includes a valve body 2 having a soft seal type opening/closing mechanism 1, a closing pipe (lid member) 3, and a detection mechanism. It is composed of 4.

As shown in FIG. 3 and FIG.
A valve body 5 having a valve body 5 formed inside thereof, a valve cover 6 attached to the valve body 5, a valve stem 7 provided through the valve cover 6, and a female threaded top 8 at the lower end of the valve stem 7. The main body is a valve body 9 attached via a valve body 9.

The valve collection chamber 5b is formed above the water passage 5a, and the boundary portion (valve box valve seat portion) 5d of the valve box 5 between the water passage 5a and the valve collection chamber 5b extends downward. The valve stem 7 is formed so as to be inclined closer to the axial direction of the valve stem 7. A flange portion 5e is formed at the upper end of the valve box at the upper end of the valve collection chamber 5b. A flange portion 6a is also formed at the lower end of the valve lid 6, and the valve lid 6 is joined to the valve box 5 by bolting the flange portion 6a to the flange portion 5e of the valve box 5. 6 has a valve collection chamber 6b inside.
is formed, and this valve collection chamber 6b is the valve collection chamber 5 of the valve box 5.
It is connected to b. Further, a valve body 9 is attached to the lower end of the valve stem 7 provided through the valve cover 6, and both sides of the valve body 9 are capable of coming into close contact with the valve seat portion 5d of the valve body 5. A valve body valve seat portion 9a is formed. The valve body 9 is moved up and down by the rotation of the valve stem 7, and the guide portion 5 formed on the inner wall of the valve collection chamber 5b
When the valve body 9 is lowered and the valve body valve seat portion 9a is brought into close contact with the valve box valve seat portion 5d, the valve body The opening/closing mechanism 1 is configured such that the lower part of the body 9 comes into close contact with the inner wall surface of the water passage 5a to block the water passage 5a. On the other hand, pipe connection flanges 10 and 1 are provided at both ends of the water passage 5a facing inside the valve box 5.
1 are formed respectively, and the distance between the surfaces of these pipe connecting flanges 10 and 11 is a dimension defined by, for example, the JIS standard.

The detection body insertion passage 5c is communicated with the water flow passage 5a, and the detection body insertion passage 5c is provided directly through water between the outer circumferential wall of the valve box 5 and one pipe connection flange 11. A pipe (communication pipe) 12 is configured to protrude upward. The flange portion 3a of the closure pipe 3 is attached to the flange portion 12a of the straight water pipe 12 with bolts.

Further, in the detection mechanism 4, a detection plate (flow detection body) 4b fixed to the lower end of the support rod 4a is arranged from the detection body insertion path 5c into the water passage 5a so as to be perpendicular to the flow of the fluid F. The upper end of the support rod 4a is connected to a horizontal shaft 4c that is rotatably supported on the inner wall surface of the closure tube 3, and the end of the horizontal shaft 4c that passes through the closure tube 3 is connected to the upper end of the support rod 4a. , one end of the rotating arm 4d is connected, and the rotating arm 4
An adjustment weight 4e whose position can be adjusted is attached to the other end of d by pin connection, while a detector such as a micro switch or a limit switch is mounted on a mounting plate 13 fixed to the upper part of the straight water pipe 12. 14 is connected to the intermediate portion of the rotating arm 4d, and the rotating arm 4d is connected between the rotating arm 4d and the mounting plate 13 between the operating body 4f and the adjustment weight 4e. A spring 4g is attached to push the spring upward.

The valve B configured as described above is, for example,
Instead of the gate valve installed in the existing water pipes,
Just attach it to the water pipe. At this time, since the distance between the surfaces of each pipe connection flange 10 and 11 (so-called valve surface dimension) is set to the length specified by JIS standards, etc., the conventional gate valve is removed and the above-mentioned Just by installing valve B, the replacement work can be done extremely easily. And valve B
The valve body 9 of the opening/closing mechanism 1 is moved up and down by the rotation of the valve stem 7 to open and close the water passage 5a, and during normal use, the valve body 9 shown in FIGS. 1 and 3 is moved upward. and use it with the water passage 5a open,
Moreover, when the flow rate of the fluid F flowing through the water passage 5a increases, the detection plate 4b of the detection mechanism 4 is pushed by the fluid F and moves to the left (downstream side) in FIG. 1, so that the detection plate 4b The support rod 4a to which is fixed rotates clockwise around the axis of the horizontal shaft 4c,
Accordingly, the rotating arm 4d also rotates clockwise, and the actuating body 4f connected to the rotating arm 4d presses the detector 14, so that the flow rate of the fluid in the water pipe reaches a predetermined value. It is possible to detect when the limit has been exceeded.

In this way, the valve B of the present invention can be easily installed in existing water pipes, can also detect the flow rate in the pipe, and is compact enough to accommodate the valve B. There is no need to use a large valve chamber, and a conventional valve chamber can be used. Furthermore, since the valve box 5 has a structure in which a straight water pipe 12 is combined with a soft seal type gate valve, painting, mold making, etc. are easy to perform, and it is particularly effective in powder coating.

Note that instead of the detector 14, a pressure sensor or the like is used, the actuating body 4f is brought into contact with the pressure sensor, etc., and the pressure exerted by the actuating body 4f pressing the pressure sensor or the like is converted into an electrical signal. Therefore, the flow rate may be measured continuously. Also,
As shown in FIG. 5, the detection mechanism may have a configuration in which a flow meter 20 is attached to the straight water pipe 12. This flowmeter 20 consists of a rotating blade (flow detection body) 20a with a built-in magnet and a flowmeter body 20b.
The flow rate is measured by interaction with the coil inside. In this case, the valve body 9, which is in the closed state in FIG. 5, is moved upward and the water passage 5a is used in an open state. Further, although the straight water pipe 12 is provided on the upstream side of the valve B, it may be provided on the downstream side depending on the case.
Further, it may be provided horizontally or vertically below the water passage 5a. Furthermore, although the opening/closing mechanism 1 of valve B was explained as a soft seal type,
Needless to say, the present invention can also be applied to other valve structures.

By forming an air layer above the straight water pipe (communication pipe) 12, the water hammer phenomenon that occurs when the opening/closing mechanism 1 suddenly closes the water passage 5a can be alleviated. If necessary, connect the communication pipe 12
The lid member 3 is removed from the tank, and a surge tank or an air chamber is connected to the communication pipe 12 to more reliably prevent the water hammer phenomenon.

Also, when inspecting or adjusting flowmeters, etc., close the upstream opening/closing mechanism.

"Effects of the Invention" In summary, according to the present invention, the following excellent effects are achieved.

(1) Since the opening/closing mechanism and the detection mechanism are provided between the surfaces of the pipe connection flange (between the valve surfaces), it can be easily installed in place of a conventional valve, and the fluid flowing inside can be easily installed. The state of the flow can be grasped.

(2) Also, since the opening/closing mechanism and the detection mechanism can be compactly integrated within the determined dimension between the valve faces, there is no need to enlarge the valve chamber.
A conventional valve chamber is sufficient.

(3) Furthermore, since instruments such as flowmeters can be concentrated in the valve part, the connecting flange part of the main piping can be omitted and the piping structure can be simplified.

(4) By forming an air layer above the straight water pipe (communication pipe), it is possible to alleviate the water hammer phenomenon that occurs when the water flow channel is suddenly closed by the opening/closing mechanism.

(5) If necessary, it is easy to remove the lid member from the communication pipe and connect a surge tank or air chamber to the communication pipe to more reliably prevent the water hammer phenomenon.

(6) The communication pipe is installed in the valve box and protrudes upward, so by closing the opening/closing mechanism on the upstream side, the flow of fluid can be stopped and the flowmeter etc. can be easily inspected or fine-tuned. can do.

(7) Since a flow meter, etc. is installed immediately near the opening/closing mechanism, one worker can quickly and accurately adjust the fluid flow by operating the opening/closing mechanism while looking at the flow meter.

[Brief explanation of the drawing]

Figures 1 to 4 show a first embodiment of the present invention, in which Figure 1 is a partially sectional front view, Figure 2 is a plan view with the occluded tube removed, and Figure 3 is a partial cross-sectional front view. 4 is a partially sectional front view of the valve body, FIG. 4 is a partially sectional side view of the valve body, and FIG. 5 is a partially sectional front view showing a second embodiment of the present invention. It is. B... Valve, 1... Opening/closing mechanism, 4... Detection mechanism, 10, 11... Pipe connection flange, F... Fluid, 5a... Water passage, 20... Flowmeter (detection mechanism).

Claims (1)

[Scope of utility model registration request] Pipe connection flanges 10, 1 are provided at both ends of the water passage 5a.
1 is provided with an opening/closing mechanism 1 for opening and closing the water passage 5a, and a communicating pipe 12 provided with a lid member 3 is provided between the one pipe connecting flange 11 and the opening/closing mechanism 1. The communication pipe 12 is provided integrally with the valve box 5 so as to open into the water passage 5a and protrude upward.
A valve characterized in that a flow sensing body 4b, 20a such as a flow meter is inserted through the valve.