JP2003329194A - Monitoring system of liquid pressure feeding device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a monitoring system of a liquid pressure feeding device wherein the amount of working fluid consumed in the liquid pressure feeding device is automatically and accurately measured. <P>SOLUTION: This monitoring system for the liquid pressure feeding device is composed of the liquid pressure feeding device 21, a pressure sensor 23 mounted on the liquid pressure feeding device 21 as a pressure detecting means, an amount of working fluid calculating means 25 connected to the pressure sensor 23, and a remote monitoring device 27 communicable with the amount of working fluid calculating means 15. The amount of working fluid calculating means 25 calculates the number of the operations of the liquid pressure feeding device 21 on the basis of the pressure in the liquid pressure feeding device 21 detected by the pressure sensor 23, calculates the amount of working fluid consumed by the liquid pressure feeding device 21 on the basis of the amount of the working fluid introduced in the liquid pressure feeding device 21 in one operation and the number of the operations, and communicates the same to the remote monitoring device 27. <P>COPYRIGHT: (C)2004,JPO

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a monitoring system for a liquid pumping device for pumping a liquid such as hot water with a working fluid such as high-pressure steam or compressed air. The liquid pumping device is used as a device for sending hot water such as condensate generated in various steam-using devices to a boiler or a waste heat utilization point. 2. Description of the Related Art As a conventional liquid pressure feeding device, for example, a device disclosed in Japanese Patent Application Laid-Open No. 10-61885 has been used. This is, as shown in FIG.
And a float 3, a float valve 4, and a snap mechanism 5 are disposed in the container, and a working steam inlet 6, a working steam outlet 7, a liquid inlet 8, and a liquid outlet 8 are provided in the lid 2. An outlet 9 is provided. The float 3 floats up and down about the fulcrum 10 as the center of rotation, moves the float valve 4 of the double valve mechanism up and down to cut off the communication of the liquid discharge port 9 and to release the first discharge.
The lever 11 is vertically displaced about the fulcrum 12. Similarly, the second rotatable centering on the fulcrum 12
The lever 13 is disposed, and the end of the second lever 13 and the first
A compressed coil spring 14 is attached between the ends of the lever 11. The operation rod 15 is connected to the upper part of the second lever 13. [0004] The operating steam outlet 7 is provided above the operating rod 15.
And a control lever 17 is fixed to the middle part of the control rod 15. An operation steam introduction port rod 18 is disposed above the operation lever 17 so as to be vertically movable, and a spherical operation steam introduction valve body 19 is disposed above the operation steam introduction port rod 18 in a free state. In the state shown in FIG. 2, the liquid in the container is small,
This shows a state in which the float 3 is located below. In this state, the float valve 4 is closed to close the inside of the container and the liquid outlet 9.
Is shut off. Although not shown, the liquid inlet 8 is connected to a pressure-feeding liquid generation source via a check valve that allows only the flow of the liquid in the inward direction of the container. A high-pressure steam source is connected to the working steam inlet 6. When the liquid flows down from the liquid inlet 8 and the liquid level in the container rises, the float 3 also rises, and the float valve 4 also slightly opens. When the liquid level further rises and the float 3 reaches a predetermined height, the snap mechanism 5 snaps and the operation rod 15 is instantaneously displaced upward. Due to the upward displacement of the operating rod 15, the working steam discharge valve body 16 closes the working steam discharge port 7, and the introduction valve body 19 opens the working steam introduction port 6, so that high-pressure steam is supplied into the container. Then, the accumulated liquid is pressure-fed from the float valve 4 and the liquid discharge port 9 to a predetermined location. [0007] When the liquid level is reduced due to the pressure of the liquid, the float 3 also lowers, and when it reaches a predetermined height, the snap mechanism 5 snaps again to the opposite side, whereby the working steam inlet 6 is closed and the working steam inlet 6 is closed. The vapor discharge port 7 is opened, the float valve 4 is also closed, and the pumping of the liquid is stopped. At the same time, the liquid flows from the liquid inlet 8 into the container again, and the above cycle is repeated. The liquid can be pumped to a predetermined location by such an operation cycle. [0008] In the above-mentioned conventional liquid pumping apparatus, there is a problem that it is unclear how much working steam is consumed for pumping the liquid. That is, the conventional liquid pumping apparatus does not have a function of measuring the amount of working steam consumed, and cannot measure the amount. Measuring the amount of working steam consumed in a liquid pumping system is important for energy management. Accordingly, an object of the present invention is to provide a monitoring system for a liquid pumping apparatus which can automatically and accurately measure the amount of working fluid consumed in the liquid pumping apparatus. Means for Solving the Problems The technical means of the present invention which has been taken to solve the above-mentioned problems is that a high-pressure working fluid inlet and a high-pressure working fluid outlet and a high-pressure working fluid are fed into a sealed container. A liquid inlet and a liquid outlet are provided, and the working fluid inlet is opened according to the level of the liquid stored in the container, and the working fluid outlet is closed. In a liquid pumping device for pumping from the outlet to the outside of the container,
A pressure detecting means for detecting the pressure in the container, and calculating the number of times of operation of the liquid pumping device from the detected pressure, and calculating the number of times of the working fluid introduced into the container in one operation and the number of times of operation by the liquid pumping device. And a working fluid amount calculating means for calculating an amount of consumed working fluid. The pressure in the container rises when the working fluid inlet is opened and the working fluid outlet is closed, and falls when the working fluid inlet is closed and the working fluid outlet is opened. The number of actuations of the pumping device can be calculated. In addition, since the volume between the water level and the ceiling wall at the lower limit of the float 3 shown in FIG. 2 is the volume in the container into which the working fluid is introduced by one operation, the working fluid is reduced by this one operation. When the compressed air is used as the working fluid, the detected pressure is used as the working fluid, and the reciprocal of the specific volume of the saturated steam based on the detected pressure is used as the working fluid. That is, the specific weight is multiplied to calculate the amount of working air or working steam introduced into the container in one operation. Then, the amount of working fluid consumed by the liquid pumping apparatus is calculated by multiplying the calculated amount of working air or working steam by the number of times of operation. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG.
A pressure sensor 23 as pressure detection means attached to the liquid pumping device 21, a working fluid amount calculation means 25 connected to the pressure sensor 23, and a remote monitoring device 27 capable of communicating with the working fluid amount calculation means 25. Constitutes the monitoring system of the liquid pumping device. The liquid pumping device 21 is shown in FIG.
The basic structure is the same as that of the conventional example shown in FIG. 1 and a working steam inlet 6 and a working steam outlet 7, a liquid inlet 8 and a liquid outlet 9 are provided, and a pressure sensor 23 and a working fluid amount calculating means are provided. 25 is newly attached. The pressure sensor 23 detects the pressure in the liquid pumping device 21. The pressure in the liquid pumping device 21 rises when the working steam inlet 6 is opened and the working steam outlet 7 is closed, and falls when the working steam inlet 6 is closed and the working steam outlet 7 is opened. The amount calculating means 25 calculates the number of times of operation of the liquid pumping device 21 from the pressure in the liquid pumping device 21 detected by the pressure sensor 23. Since the volume between the water level and the ceiling wall at the lower limit of the float 3 shown in FIG. 2 is the volume in the container into which the working steam is introduced by one operation, the working fluid amount calculating means 25 In this case, a storage unit (not shown) previously stores the volume in the container into which the working steam is introduced by this one operation, and also stores the relationship between the pressure of the saturated steam and the specific volume in advance. The working fluid amount calculating means 25 calculates the specific volume of the saturated steam based on the pressure in the liquid pumping device 21 detected by the pressure sensor 23 in the volume in the container into which the working steam is introduced in one operation. Is multiplied by the specific weight to calculate the amount of working steam introduced in one operation, and the calculated amount of working steam is multiplied by the number of times of operation to calculate the amount of working steam consumed by the liquid pumping device 21. Is calculated, the calculated amount of working steam is stored in the storage unit, and the display unit 2
9 is displayed. When compressed air is used as the working fluid, the volume in the container into which the working air is introduced in one operation is multiplied by the pressure in the liquid pumping device 21 detected by the pressure sensor 23. The amount of working air introduced in one operation is calculated, and the calculated amount of working air is multiplied by the number of times of operation to calculate the amount of working air consumed in the liquid pumping device 21. The amount of air is stored in the storage unit and displayed on the display unit 29. The working fluid amount calculating means 25 has a built-in communication means capable of wirelessly communicating the amount of working steam or working air stored in the storage section from the antenna 31 to the remote monitoring device 27. The remote monitoring device 27 is disposed at a position distant from the liquid pumping device 21, for example, in a centralized control monitoring room of a factory plant. The amount of working steam or working air consumed at 21 is displayed on the display unit 35. According to the monitoring system for a liquid pumping apparatus of the present invention, the flow rate of the working fluid consumed by the liquid pumping apparatus is provided by providing the liquid pumping apparatus with pressure detecting means and working fluid amount calculating means. Has an excellent effect that can be measured automatically and accurately.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a configuration diagram showing a monitoring system for a liquid pumping device according to the present invention. FIG. 2 is a cross-sectional view of a liquid pumping device showing a conventional example. [Description of Signs] 6 Working steam inlet 7 Working steam outlet 8 Liquid inlet 9 Liquid outlet 21 Liquid pumping device 23 Pressure sensor 25 Working fluid amount calculating means 27 Remote monitoring device

Claims (1)

Claims: 1. An airtight container is provided with a high-pressure working fluid inlet and a working fluid outlet, and a liquid inlet and a liquid outlet to be fed under pressure, so that the liquid accumulated in the container can be removed. The working fluid inlet is opened according to the liquid level, the working fluid outlet is closed, and the liquid pumping device for pumping the liquid accumulated in the container from the liquid outlet to the outside of the container is used to reduce the pressure in the container. Pressure detecting means for detecting, and the number of times of operation of the liquid pumping device is calculated from the detected pressure, and the amount of working fluid introduced into the container in one operation and the working fluid consumed by the liquid pumping device based on the number of times of operation. And a working fluid amount calculating means for calculating an amount of the fluid.