JPS6266136A - Measuring device for pipe pressure - Google Patents

Abstract

PURPOSE:To measure exactly the average pressure even if there is a difference in a pipe pressure distribution by a structure which can be handled easily, by attaching a flexible cylindrical sealed bag which is sealed with an imcompressible fluid, to the inner surface of a rigidity pipe body. CONSTITUTION:A flexible cylindrical sealed bag 2 is positioned on the inside peripheral surface of an outer cylinder 1 which is connected on the way of a passage pipe 5, and its inside is sealed with an imcompressible fluid 4 and a fluid pressure is connected to a pressure gauge 3. Accordingly, even if pressure is different in a section of the pipe 5, it can be detected exactly as its average pressure, and since the pressure gauge does not contact to an object to be carried, the pipe is not clogged, it is also unnecessary to make a hole in the pipe, and it can be attached and handled very easily.

Description

[Detailed description of the invention] <Industrial application field> The present invention relates to an apparatus for measuring pressure inside a pipe.

<Prior Art> There are devices that measure the pressure inside a pipe during concrete pump placement, such as a device that measures pressure by connecting a pressure gauge midway through the pipe.

Problems to be solved by the present invention> Conventional measuring devices have the following problems.

(a) In the case of a fluid exhibiting isotropic pressure inside the pipe, such as water, the pressure at the point where the pressure gauge is connected becomes the average pressure inside the pipe, making it possible to accurately measure the pressure.

On the other hand, in the case of concrete, etc., which exhibits pressure distribution that varies depending on the location even on the same cross section inside the pipe, the pressure displayed by the pressure gauge cannot be taken as the average pressure inside the pipe, and it is difficult to accurately measure pressure. I can't.

(b) The connection between the pipe body and the pressure gauge is likely to become clogged with substances such as concrete aggregate, making it impossible to measure the internal pressure of the pipe, making it impossible to use it with confidence.

c) Since it is necessary to connect a pressure gauge to the pipe body, holes must be made or processed in the pipe, making it difficult to install it easily.

<Object of the present invention> The present invention was made to solve the above-mentioned problems, and it is possible to accurately measure the average pressure even in concrete, etc., where the pressure distribution is different, and to prevent the connection between the pipe and the pressure gauge from becoming clogged. To provide an in-pipe pressure measuring device that can be used safely without any problems and can be easily installed.

<Example> An example of the pipe pressure measuring device of the present invention will be described with reference to the drawings.

As shown in FIG. 1, the pipe internal pressure measuring device of the present invention includes an outer cylinder 1 connected to a flow pipe 5, an enclosure bag 2 located inside the outer cylinder 1, and a pressure gauge 3 connected to the outer cylinder 1. It consists of more.

(A) Outer cylinder The outer cylinder 1 is a pipe connected to the middle of the flow path pipe 5 for measuring pressure, and is formed of, for example, a steel pipe.

To connect the outer cylinder 1, for example, by protruding flanges 11 at both ends of the outer cylinder 1 and opening holes in the flanges 11, the connection can be easily performed using bolts.

An enclosure bag 2 is provided on the inner peripheral surface of the outer cylinder 1 as shown in FIG.
position.

(B) Enclosure bag The enclosure bag 2 is a sealed body made of a highly flexible known material and formed into a cylindrical shape.

An incompressible fluid 4 is sealed inside the enclosing bag 2 and configured so that the fluid pressure of the incompressible fluid 4 can be transmitted to the pressure gauge 3.

In this way, if an incompressible fluid or the like is sealed inside a cylindrical body formed of a flexible bag, the average pressure at that cross section can be accurately detected even if different pressures are applied at that cross section. be able to.

Note that if the inner diameter of the enclosure bag 2 is equal to the inner diameter of the flow path tube 5 for measuring pressure, when the outer tube 1 is connected to the flow path tube 5, the inner peripheral surfaces of the flow path tube 5 and the enclosure bag 2 are the same. It forms a surface and does not impede the flow of fluid within the pipe.

(c) Pressure gauge The pressure gauge 3 is a known measuring device for displaying the internal pressure of the enclosure bag 2.

By connecting this pressure gauge 3 to the incompressible fluid 4 inside the enclosure bag 2, the average pressure of the force acting on the entire surface of the enclosure bag 2 can be measured.

Effects of the Present Invention> Since the pipe pressure measuring device of the present invention is as described above, the following effects can be expected.

(B) An enclosure bag for detecting pressure was formed by making a flexible bag body into a cylinder and sealing an incompressible fluid inside.

For this reason, it has become possible to measure the pressure inside a pipe even with fluids such as concrete that exhibit different pressure distributions within the pipe, and it has become possible to accurately measure the average pressure in a cross section.

(b) Since the enclosure bag is located on the inner peripheral surface of the outer cylinder and the pressure gauge is connected to the outer cylinder, the pressure gauge does not come into contact with the transported object.

Therefore, there is no fear of clogging with concrete aggregate, etc., so it can be used with peace of mind.

(C) Since it is configured so that it can be connected in the middle of the pipe, there is no need to make holes in the pipe, and it can be easily connected using bolts etc. at the joint of the pipe.

Moreover, since the structure is simple, it is easy to handle.

(d) If the inner diameter of the enclosure bag is made equal to the inner diameter of the tube, the flow within the tube will not be affected.

[Brief explanation of drawings]

Figures 1 and 2 are explanatory diagrams of an embodiment of the pipe pressure measuring device of the present invention.

Claims (1)

[Claims] A cylindrical body formed of a flexible bag is attached to the inner surface of a rigid tube body, an incompressible fluid is sealed in the bag body, and the fluid pressure of the incompressible fluid is set to a pressure. A pipe pressure measuring device configured to transmit information to the pressure gauge.