JP2009156774A - Method and device for monitoring flow rate - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To recognize a flow rate of flow water flowing in a steel pipe without taking time. <P>SOLUTION: A method for monitoring the flow rate attaches a spring 41 displacing in an axial direction of the steel pipe 20 to the inside of the steel pipe 20 in response to acting tension force, connects a resistant member 42 receiving hydraulic pressure from the flow water 1 flowing in the steel pipe 20 to the spring 41 so as to apply the tension force toward a downstream on the spring 41, and monitors an increase and a decrease of the flow rate in the steel pipe 20 from displacement generated in the spring 41. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method and apparatus for monitoring the flow rate of flowing water in a pipe or the like through which flowing water flows.

Conventionally, in steel pipes through which irrigation water flows, a predetermined amount of water must flow, so the flow rate of running water must be monitored. As a method for monitoring the flow rate of water flowing through such a steel pipe, a method using a flow meter is conceivable, but the flow meter is very expensive. Therefore, as a method for monitoring the flow rate at a low price, for example, in Patent Document 1, a water discharge layer and a water receiving tank are provided at the entrance and exit of the steel pipe, respectively, and the water levels in these water discharge layer and the water receiving tank are measured, A method for estimating and monitoring the above is described.
Japanese Patent Laid-Open No. 10-185635

  However, in the above method, since the amount of water in the drainage layer and the receiving tank is visually confirmed, it is necessary to go to the drainage layer and the receiving tank to check the water level every time the flow rate is monitored. There was a problem.

  This invention is made | formed in view of said problem, The objective is to enable it to confirm the flow volume of the flowing water which flows through the inside of a steel pipe, without an effort.

  The flow rate monitoring method of the present invention is a method for monitoring the flow rate of water flowing in a pipe, wherein an elastic member that is displaced in the axial direction according to a tensile force acting in the axial direction of the pipe is attached in the pipe, A monitoring window in which a resistance member that receives water pressure from flowing water in a pipe is connected to the elastic member so that a tensile force corresponding to the received water pressure is applied to the elastic member, and displacement generated in the elastic member is provided in the pipe The flow rate in the pipe is monitored by visually recognizing from the above.

  In the above flow rate monitoring method, the elastic member may be a spring provided across the flowing water in the pipe.

  Further, the resistance member may be composed of a linear body and a plurality of cones attached to the linear body, and the plurality of cones are spaced apart from each other by a predetermined interval. It is attached to the body and is formed so as to be identifiable. Based on which cone is visible from the monitoring window, the displacement generated in the elastic body may be estimated and the flow rate in the pipe may be monitored. .

  The flow rate monitoring device of the present invention is a device for monitoring the flow rate of running water flowing in a pipe, and is attached to the monitoring window provided in the pipe and in the axial direction of the pipe. An elastic member that is displaced in the axial direction in accordance with a tensile force, and a resistance member that is connected to the elastic member and receives a water pressure from flowing water flowing in the pipe, and acts on the elastic member according to the received water pressure. And.

  In the present invention, since the resistance member receives the water pressure of flowing water and estimates the flow rate based on the displacement of the elastic member caused by the tensile force applied by the resistance member, the flow rate can be monitored at a desired position of the pipe. it can. For this reason, it is not necessary to move to the water discharge tank or the water receiving tank for the flow rate monitoring, and the labor of the flow rate monitoring work can be reduced.

Hereinafter, an embodiment of a flow rate monitoring apparatus of the present invention will be described in detail with reference to the drawings.
1A and 1B are diagrams showing a configuration of a flow rate monitoring apparatus according to the present embodiment, in which FIG. 1A is a perspective view, FIG. 1B is a vertical sectional view, and FIG. 1C is a plan view. The flow rate monitoring device 10 of the present embodiment is provided so as to connect an upstream water discharge tank to a downstream water receiving tank, and for measuring the flow rate of the flowing water 1 flowing inside the steel pipe 20 through which irrigation water flows. Device. As shown in the figure, the flow rate monitoring device 10 includes a spring 41 having both ends connected to opposing positions in the steel pipe 20 so as to cross the running water 1, a string 43 attached to an intermediate portion of the spring 41, and the string. And a plurality of resistance members 42 attached to 43 at a predetermined interval.

  Both ends of the spring 41 are attached to opposite positions in the steel pipe 20, and when a tensile force acts on the intermediate portion of the spring 41 in the axial direction of the steel pipe 20 from the string 43, the steel pipe 20 is in accordance with the magnitude of the tensile force. Displacement in the axial direction.

  The plurality of resistance members 42 are formed in a shape (bulky shape) in which the bottom surface of a hollow cone is opened, and the string 43 is arranged such that the bottom surface opened to the base side (the side attached to the spring 41) of the string 43 faces. Is attached to. The plurality of resistance members 42 are made of a material equivalent to or slightly larger in specific gravity than the flowing water 1 flowing through the steel pipe 20, and are colored in different colors so that each can be distinguished visually. Thus, since the resistance member 42 is made of a material that is equivalent to or slightly larger in specific gravity than the flowing water 1, the resistance member 42 floats in the flowing water 1 without sinking to the bottom of the steel pipe 20 or floating on the surface of the flowing water 1.

  In this way, a resistance force toward the downstream acts on the plurality of resistance members 42 drifting in the flowing water 1 by the water pressure of the flowing water 1 flowing in the steel pipe 20. The resistance force acting on the resistance member 42 is transmitted as a tensile force toward the downstream side to the intermediate portion of the spring 41 via the string 43. When a tensile force acts on the intermediate portion of the spring 41, the intermediate portion of the spring 41 is displaced downstream by a displacement amount corresponding to the magnitude of the tensile force.

  In addition, an elliptical opening 21 is provided in the upper portion of the steel pipe 20 on the downstream side of the position where the spring 41 is attached, and a frame member 22 is attached to the edge of the opening 21. Normally, a lid 30 formed in accordance with the shape of the frame member 22 is fitted into the opening 21. An acrylic viewing window 31 is provided on the lid 30 so that the inside of the steel pipe 20 can be seen through the viewing window. A watertight rubber (not shown) is attached to the frame member 22 attached to the steel pipe 20 and the edge portion 22 of the lid 30 so that water leakage does not occur from this gap when the lid 30 is attached.

  2A and 2B are diagrams showing the flow rate monitoring device 10 in a state where the flow rate is increased, in which FIG. 2A is a vertical sectional view and FIG. 2B is a plan view. As shown in the figure, when the flow rate flowing through the steel pipe 20 increases, the water level increases, and at the same time, the flow velocity of the flowing water 1 increases. As the flow velocity of the flowing water 1 increases, the pressure of the flowing water acting on the resistance member 42 increases. Thereby, the tensile force transmitted from the resistance member 42 to the spring 41 via the string 43 is increased, and the amount of displacement of the intermediate portion of the spring 41 downstream is increased. For this reason, the resistance member 42 attached to the base side (that is, the upstream side) of the string 41 can be visually recognized from the observation window 31 as compared with the normal time. Furthermore, the greater the flow rate of the running water 1, the faster the flow velocity and the greater the amount of displacement of the spring 41. Therefore, the resistance member 42 on the base side of the string 41 can be visually recognized.

  3A and 3B are diagrams showing the flow rate monitoring device 10 in a state where the flow rate is reduced, in which FIG. 3A is a vertical cross-sectional view and FIG. 3B is a plan view. As shown in the figure, when the flow rate of the flowing water 1 flowing in the steel pipe 20 is reduced, the water level is reduced, and the flow velocity of the flowing water 1 is slowed along with this. When the flow velocity of the flowing water 1 becomes slow, the pressure of the flowing water acting on the resistance member 42 becomes small. As a result, the tensile force transmitted from the resistance member 42 to the spring 41 via the string 43 is reduced, and the amount of displacement of the intermediate portion of the spring 41 downstream is reduced. For this reason, the resistance member 42 attached to the downstream side of the string 43 can be visually recognized from the sight window 31 as compared with the normal time. Furthermore, the smaller the flow rate of the flowing water 1, the slower the flow velocity and the smaller the displacement amount of the spring 41, so that the resistance member 42 on the root side of the string 41 can be visually recognized.

  Thus, when the flow rate of the running water 1 increases, the resistance member 42 attached to the upstream side of the string 43 can be visually recognized from the viewing window 31, and when the flow rate of the running water 1 decreases, Since the resistance member 42 attached to the downstream side can be visually recognized from the window 31, for example, when the resistance member 42 serving as a reference is set and the resistance member 42 on the upstream side is visible, the flow rate is always higher. If the resistance member 42 on the downstream side of the reference resistance member 42 is visible, it can be determined that the flow rate is lower than usual. Furthermore, from the confirmed color of the resistance member 42, it is possible to grasp how much the resistance member 42 is displaced from the reference, and based on this, an increase / decrease amount of the flow rate of the flowing water 1 can be estimated.

  In addition, when the flow volume of the flowing water 1 is reducing, it is possible that impurities, such as moss, adhered to the steel pipe 20. In such a case, the inside of the steel pipe 20 can be cleaned from the opening 21 by removing the lid 30 attached to the opening 21 of the steel pipe 20.

  According to this embodiment, since the flow rate monitoring device 10 can be provided at a desired position of the steel pipe 20, it is necessary to move to a water discharge tank upstream of the steel pipe 20 and a downstream water receiving tank in order to monitor the flow rate. As a result, the labor for monitoring the flow rate can be reduced.

  In the present embodiment, a plurality of resistance members 42 are attached to the string 43. However, it is not always necessary to attach a plurality of resistance members 42, and only one resistance member 42 is provided. The displacement amount of the spring 41 may be estimated by describing a scale or the like that can identify the displacement amount. In this case, the resistance member 42 is provided sufficiently downstream so that the resistance member 42 is located downstream of the viewing window 31 (that is, the scale of the string 43 can always be visually recognized from the viewing window 31) even when the flow rate is reduced.

  In addition, the resistance member 42 does not necessarily have a conical shape. In short, it may have any shape as long as it can receive water pressure from flowing water flowing in the steel pipe 20.

  In the present embodiment, the spring 41 is provided so as to cross the running water in the steel pipe 20. However, the present invention is not limited to this, and any elastic body that is displaced according to the stress acting from the string 43 may be attached to the spring 41. It can be used by changing.

It is a figure which shows the structure of the flow volume monitoring apparatus of this embodiment, (A) is a perspective view, (B) is a vertical sectional view, (C) It is a top view. It is a figure which shows the flow volume monitoring apparatus of the state in which the flow volume increased, (A) is a vertical sectional view, (B) is a top view. It is a figure which shows the flow volume monitoring apparatus of the state in which the flow volume decreased, (A) is a vertical sectional view, (B) is a top view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Flowing water 10 Flow monitoring apparatus 20 Steel pipe 21 Opening 22 Frame material 30 Lid 31 Peeping window 32 Edge 41 Spring 42 Resistance member 43 String

Claims (5)

A method for monitoring the flow rate of water flowing in a pipe,
An elastic member that is displaced in the axial direction according to the tensile force acting in the axial direction of the tube is attached in the tube,
Connecting a resistance member that receives water pressure from flowing water in the pipe to the elastic member so that a tensile force corresponding to the received water pressure acts on the elastic member;
A flow rate monitoring method characterized by monitoring a flow rate in the pipe by visually recognizing a displacement generated in the elastic member from a monitoring window provided in the pipe. The flow rate monitoring method according to claim 1,
The flow rate monitoring method according to claim 1, wherein the elastic member includes a spring provided in the pipe so as to cross the flowing water. The flow rate monitoring method according to claim 1 or 2,
The resistance member is a striatum,
A flow rate monitoring method comprising a plurality of cones attached to the striatum. A flow rate monitoring method according to claim 3,
The plurality of cones are attached to the striatum at a predetermined interval, and are formed so as to be identifiable.
A flow rate monitoring method characterized by estimating a displacement generated in the elastic body based on which cone is visible from the monitoring window and monitoring the flow rate in the pipe. A device for monitoring the flow rate of flowing water flowing in a pipe,
A monitoring window provided in the tube;
An elastic member attached in the tube and displaced in the axial direction according to a tensile force acting in the axial direction of the tube;
A flow rate monitoring device comprising: a resistance member connected to the elastic member, receiving a water pressure from flowing water flowing in the pipe, and causing the elastic member to act on the elastic member according to the received water pressure.