Pipe network evaluation device and method

Patent metadata

Field	Value
Publication number	US-11099585-B2
Application number	US-201616068057-A
Country	US
Kind code	B2
Filing date	Dec 22, 2016
Priority date	Jan 4, 2016
Publication date	Aug 24, 2021
Grant date	Aug 24, 2021

Abstract

Provided is a pipe network evaluation device that is capable of calculating a pressure loss in a pipe network and a consumption flow rate of compressed air in each terminal equipment without inputting layout information on devices, even in a case where there are some devices, the layout information about which is difficult to ascertain visually or obtain from a building drawing, or the like. Provided is a pipe network evaluation device that estimates the resistance of a pipe, the layout information about which is unknown, on the basis of pressure data on compressed air in an air tank, flow rate data on compressed air supplied from the air tank, layout unknown-part pipe outlet pressure data, for which layout information is unknown, and layout known-part pipe layout information, for which layout information is known.

First claim

The invention claimed is:

1. A pipe network evaluation device for calculating a flow of compressed air in a pipe network in consideration of a friction loss and a heat loss of a fluid equipment and a pipe based on a pipe network model including the fluid equipment and the pipe, the pipe network evaluation device comprising:
a computer programmed to calculate the flow of the compressed air in the pipe network in consideration of the friction loss and the heat loss of the fluid equipment and the pipe based on the pipe network model including the fluid equipment and the pipe; and
a memory storing a program that is executed by the computer;
wherein the computer includes:
a layout-unknown part pipe resistance calculating means for estimating a pipe resistance of a layout-unknown part, based on:
air tank pressure data, which is pressure data of compressed air in an air tank connected to the pipe network;
air tank outlet flow rate data, which is flow rate data of compressed air supplied from the air tank to the pipe network;
layout-unknown part pipe outlet pressure data, which is outlet pressure data of a part where layout information is unknown; and
layout-known part pipe layout information, which is layout information of a part where layout information is known.

2. The pipe network evaluation device according to claim 1 , wherein the layout-unknown part pipe resistance calculating means estimates the pipe resistance of the layout-unknown part for the pipe network via pipe network optimization calculation based on the layout-known part pipe layout information with the air tank pressure data and the layout-unknown part pipe outlet pressure data as boundary conditions until a difference between a pipe flow rate calculation value of the layout-unknown part and a flow rate measurement value stored in the air tank outlet flow rate data falls within a certain threshold value.

3. A pipe network evaluation device for calculating a flow of compressed air in a pipe network in consideration of a friction loss and a heat loss of a fluid equipment and a pipe based on a pipe network model including the fluid equipment and the pipe, the pipe network evaluation device comprising:
a computer programmed to calculate the flow of the compressed air in the pipe network in consideration of the friction loss and the heat loss of the fluid equipment and the pipe based on the pipe network model including the fluid equipment and the pipe;
a memory storing a program that is executed by the computer;
a pressure sensor to detect a pressure in an air tank connected to the pipe network;
a pressure sensor to detect a pressure of a pipe outlet of a layout-unknown part;
a flow rate sensor to detect a flow rate of compressed air supplied from the air tank to the pipe network;
a terminal including an air cylinder or an air blow, used in a production process of a factory as consuming compressed air;
wherein the computer includes:
a measurement value acquiring means for acquiring and storing detection values of the pressure sensor and the flow rate sensor;
a layout-known part pipe information inputting means for inputting pipe layout information, in which layout information is known;
a layout-unknown part pipe resistance optimization calculating means for obtaining a pipe resistance of a layout-unknown part by an optimization calculation method, based on data stored in the measurement value acquiring means and layout-known part pipe information input with the layout-known part pipe information inputting means;
a pipe network pressure loss calculating means for calculating a pressure loss of the pipe network based on a layout-unknown part pipe resistance calculated with the layout-unknown part pipe resistance optimization calculating means and the layout-known part pipe information input with the layout-known part pipe information inputting means; and
a pipe network calculation result displaying means for evaluating characteristics relating to a flow of compressed air in the pipe network based on a pipe network pressure loss calculation result calculated with the pipe network pressure loss calculating means and transmitting the result to a display device.

4. The pipe network evaluation device according to claim 3 , wherein the pipe network calculation result displaying means displays distinctively the layout-unknown part pipe and a known part pipe.

5. The pipe network evaluation device according to claim 3 , wherein the pipe network calculation result displaying means displays at least one of a pipe resistance calculation result of the layout-unknown part, a pressure, a flow rate, a temperature, and a direction of a fluid flow of one of pipe and equipment.

6. The pipe network evaluation device according to claim 4 , comprising:
a pressure sensor to detect a pressure of a pipe outlet of a layout-unknown part;
a terminal including an air cylinder or an air blow, used in a production process of a factory as consuming compressed air;
a first control valve to control a compressed air flow supplied to the terminal and to adjust a flow rate;
a second control valve to control a compressed air flow supplied to the terminal and to adjust a flow rate,
wherein the measurement value acquiring means acquires and stores a detection value of the pressure sensor; and
a layout-unknown pipe outlet flow condition inputting means for calculating a valve opening degree of the first control valve or the second control valve with either the first control valve or the second control valve in an open state and the other in a closed state.

7. A pipe network evaluation method in a pipe network evaluation device including a computer programmed to calculate the flow of the compressed air in the pipe network in consideration of the friction loss and the heat loss of the fluid equipment and the pipe based on the pipe network model including the fluid equipment and the pipe, and a memory storing a program that is executed by the computer, for calculating a flow of compressed air in a pipe network in consideration of a friction loss and a heat loss of a fluid equipment and a pipe based on a pipe network model including the fluid equipment and the pipe, the pipe network evaluation method comprising:
acquiring and storing detection values of
a pressure sensor to detect a pressure in an air tank connected to the pipe network,
a pressure sensor to detect a pressure of a pipe outlet of a layout-unknown part, and
a flow rate sensor to detect a flow rate of compressed air supplied from the air tank to the pipe network;

inputting pipe layout information, in which layout information is known;
obtaining a pipe resistance of a layout-unknown part by an optimization calculation method, based on data stored in a measurement value acquiring means and layout-known part pipe information input with a layout-known part pipe information inputting means;
calculating a pressure loss of the pipe network based on a layout-unknown part pipe resistance calculated with a layout-unknown part pipe resistance optimization calculating means and the layout-known part pipe information input in an inputting layout-known part pipe information process; and
evaluating characteristics relating to a flow of compressed air in the pipe network based on a pipe network pressure loss result calculated with a pipe network pressure loss calculating means and transmitting the result to a display device.

8. The pipe network evaluation method according to claim 7 , comprising:
a pressure sensor to detect a pressure of a pipe outlet of a layout-unknown part;
controlling a compressed air flow supplied to a terminal and adjusting a flow rate;
controlling a compressed air flow supplied to a terminal and adjusting a flow rate;
acquiring and s

Assignees

• Hitachi Industry Equipment Systems Co Ltd

Inventors

• Liu Yaping
• Yashiki Tatsurou
• Katagiri Yukinori

Classifications

• F17D5/00

  Protection or supervision of installations (arrangements for protecting foundations E02D31/00; protecting pipes from damage or internal or external wear F16L57/00, against corrosion and scale F16L58/00; investigation of the fluid-tightness of structures G01M3/00) · CPC title

• G06G7/50

  for distribution networks, e.g. for fluids (G06G7/62 takes precedence) · CPC title

• G01F1/00

  Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow (measuring a proportion of the volume flow G01F5/00) · CPC title

• G05D7/0664 Primary

  the plurality of throttling means being arranged for the control of a plurality of diverging flows from a single flow (G05D7/0652 takes precedence; ratio control G05D11/13) · CPC title

• G05D7/0623 Primary

  characterised by the set value given to the control element · CPC title