JP2013024274A - Monitoring system for liquid pressure feeding device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a monitoring system for a liquid pressure feeding device, which can accurately estimate the working life of the liquid pressure feeding device.SOLUTION: In a liquid pressure feeding device 24, a sealed container includes a gas supply port 6 and a gas discharge port 7 for a working gas and an inlet 8 and a pressure feeding port 9 for a pressure feeding liquid. A float 3 is disposed in the sealed container, and when the float 3 reaches a predetermined high level, the gas supply port 6 is opened and the gas discharge port 7 is closed, and when the float 3 reaches a predetermined low level, the gas supply port 6 is closed and the gas discharge port 7 is opened. The liquid pressure feeding device 24 includes an operation detector 34 for detecting vibrations, sounds or ultrasonic waves caused by the operation of the liquid pressure feeding device 24, and a working life estimation device 35 which estimates the working life of the liquid pressure feeding device 24 based on the period of time from opening of the gas supply port 6 and closing of the gas discharge port 7 to the closing of the gas supply port 6 and opening of the gas discharge port 7 next.

Description

The present invention relates to a monitoring system for a liquid pumping apparatus that pumps liquid such as hot water or fuel. The monitoring system for a liquid pressure feeding device of the present invention is particularly suitable as a monitoring system for a device for sending condensate generated by various steam using devices to a boiler or a waste heat utilization site.

A conventional monitoring system for a liquid pumping device is disclosed in Patent Document 1, for example. This is because an air supply port and an exhaust port for working gas and an inflow port and a pumping port for pressurized liquid are provided in the sealed container, and a float is arranged in the sealed container, and the air supply port is opened when the float reaches a predetermined high level. In addition, the exhaust port is closed and the working gas is supplied from the air supply port into the sealed container, whereby the liquid in the sealed container is pumped from the pressure feed port, and the air supply port is closed when the float reaches a predetermined low level. At the same time, the operating gas in the sealed container is exhausted from the exhaust port and the liquid flows into the sealed container from the inlet until the float reaches a predetermined high level. And an operation detector that detects the operation of the liquid pumping device by detecting the pressure or the liquid level, and when the air supply port is opened and the exhaust port is closed and then the air supply port is opened and exhausted. Mouth closed The life of the liquid pumping unit is estimated from the time until the air supply port is closed or the time from when the air supply port is closed and the exhaust port is opened to when the air supply port is closed and the exhaust port is opened next. A life estimator is provided.

JP2002-181287

The liquid pumping device switches between the inflow of liquid into the sealed container and the pumping of liquid from the sealed container due to wear of internal parts during operation and adhesion and accumulation of foreign matters such as rust and scale in the liquid. When the distance between the predetermined high level and the predetermined low level is gradually increased, a failure occurs when this interval is extended to the limit. When the interval between the predetermined high level and the predetermined low level is widened, the time from when the air supply port is opened and the exhaust port is closed until the next time when the air supply port is opened and the exhaust port is closed or The time from when the air supply port is closed and the exhaust port is opened until the next time when the air supply port is closed and the exhaust port is opened increases. However, the time from when the air supply port is closed and the exhaust port is opened until the next time the air supply port is opened and the exhaust port is closed depends on the flow rate of the liquid flowing into the liquid pumping device. Therefore, the conventional monitoring system for the liquid pumping apparatus has a problem that the life of the liquid pumping apparatus cannot be accurately estimated.

Therefore, the problem to be solved by the present invention is to provide a monitoring system for a liquid pumping apparatus that can accurately estimate the life of the liquid pumping apparatus.

In order to solve the above problems, a monitoring system for a liquid pressure feeding device according to the present invention is provided with a working gas supply port and an exhaust port and a pressure liquid feeding port and a pressure feeding port provided in a sealed container, and a float is formed in the sealed container. When the float reaches a predetermined high level, the air supply port is opened and the exhaust port is closed, and the working gas is supplied from the air supply port into the sealed container, so that the liquid in the sealed container is discharged from the pressure feed port. When the float reaches the predetermined low level, the air supply port is closed and the exhaust port is opened, and the working gas in the sealed container is exhausted from the exhaust port and the liquid is discharged from the inflow port until the float reaches the predetermined high level. In a liquid pumping device that flows into a sealed container, whether an operation detector that detects vibration, sound, or ultrasonic waves that accompanies the operation of the liquid pumping device, and when the air supply port is opened and the exhaust port is closed Outlet with then the air supply port is closed is characterized in that provided with the life estimator for estimating the lifetime of the liquid pumping device from time to time to be opened.

According to the present invention, an operation detector that detects vibration, sound, or ultrasonic waves that accompanies the operation of the liquid pumping device, and the air supply port is closed after the air supply port is opened and the exhaust port is closed. In addition, since the life estimator for estimating the life of the liquid pumping device from the time until the exhaust port is opened, the life of the liquid pumping device can be accurately estimated.

It is a block diagram of the monitoring system of the liquid pumping apparatus concerning embodiment of this invention. It is sectional drawing of the liquid pumping apparatus of FIG. It is a figure which shows the level of the vibration, sound, or ultrasonic wave accompanying the action | operation of the liquid pumping apparatus of FIG. It is an expanded sectional view of the action | operation detector of the liquid pumping apparatus of FIG.

Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 4. The liquid pumping device 24 forms a sealed container with the main body 1 and the lid 2, and the float 3, the float valve 4, and the snap mechanism portion 5 are arranged in the sealed container, and the working gas supply port 6 is provided in the lid 2. An exhaust port 7, a pumping liquid inlet 8 and a pumping port 9 are provided. The inflow port 8 is connected to an inflow pipe 21 communicating with a heat exchanger 25 as a steam using device via an inflow side check valve 20 that allows only a liquid flow to the sealed container, and the pressure port 9 is a liquid pressure destination. Is connected to a pressure-feed pipe 30 communicating with a boiler 29 as a liquid pressure-feed destination via a pressure-feed-side check valve 22 that allows only the flow of liquid to the heat supply port 25. The exhaust pipe 7 is connected to an exhaust pipe 23 communicating with a steam circulation side (not shown).

The float 3 floats up and down around 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 pressure feed port 9, and moves the first lever 11 up and down around the fulcrum 12. Displace. Similarly, a second lever 13 is disposed so as to be rotatable about the fulcrum 12, and a compressed coil spring 14 is attached between the end of the second lever 13 and the end of the first lever 11. The operation rod 15 is connected to the upper part of the second lever 13. A spherical exhaust valve body 16 that opens and closes the exhaust port 7 is attached to the upper portion of the operation rod 15, and an operation lever 17 is fixed to the middle portion of the operation rod 15. An air supply rod 18 is arranged above the operation lever 17 so as to be movable up and down, and a spherical air supply valve body 19 that opens and closes the air supply port 6 is further arranged above the air supply rod 18 in a free state.

The liquid pumping device 24, the operation detector 34, and the life estimator 35 constitute a liquid pumping device monitoring system. The operation detector 34 detects vibration, sound, or ultrasonic waves associated with the operation of the liquid pumping device 24, and the vibrometer of the present embodiment is fixed to the main body 1 by screw connection as shown in FIG. A case 44; a detection needle 45 slidably disposed in the case 44 in the axial direction of the case 44; a vibration transmission plate 46 screwed to the detection needle 45; an electrode plate 47 inserted into the detection needle 45; and a piezoelectric element 48. , An electrode plate 49, a weight 50, a vibration isolating element 53 comprising a vibration isolating rubber 51 and a nut 52 fixed to the detection needle 45, and a tip of the detection needle 45 disposed between the vibration isolating rubber 51 and the upper wall of the case 44. Is constituted by a coil spring 54 for urging the main body 1 and a temperature sensor 55 attached to the tip of the detection needle 45. As shown in FIG. 3, the level of vibration, sound, or ultrasonic wave accompanying the operation of the liquid pumping device 24 is such that when the air supply port 6 is opened and the exhaust port 7 is closed, and the air supply port 6 is closed. At the same time, when the exhaust port 7 is opened, when the working vapor is supplied from the air supply port 6 into the sealed container, the liquid becomes lower in the order in which the liquid flows from the inlet 8 into the sealed container. The life estimator 35 reaches a predetermined low level after the liquid level in the sealed container reaches a predetermined high level and the air supply port 6 is opened and the exhaust port 7 is closed, and then the air supply port 6 is closed. In addition, based on the time (T) until the exhaust port 7 is opened, the life is approaching when the time (T) exceeds, for example, 1.2 times as a predetermined threshold value compared to the initial time. An alarm to notify is issued.

FIG. 2 shows a state where the liquid level in the sealed container is low and the float 3 is located at the bottom. The float valve 4 is closed to shut off the inside of the sealed container and the pressure feed port 9, the air supply valve body 19 closes the air supply port 6, and the exhaust valve body 16 opens the exhaust port 7. The working steam in the sealed container is exhausted from the exhaust port 7 to the steam circulation side through the exhaust pipe 23, and the liquid generated in the heat exchanger 25 is sealed from the inlet 8 through the inlet pipe 21 through the inlet check valve 20. It flows into the container. As the liquid level in the sealed container rises, the float 3 rises and the float valve 4 opens. When the float 3 reaches a predetermined high position, the snap mechanism portion 5 snaps and the air supply valve body 19 opens the air supply port 6 and the exhaust valve body 16 closes the exhaust port 7 and is sealed from the air supply port 6. The liquid in the sealed container is pumped from the pumping port 9 to the boiler 29 via the pumping side check valve 22 by the working steam supplied into the container. When the float 3 descends as the liquid is pumped, and the float 3 reaches a predetermined low level, the float valve 4 closes, the snap mechanism 5 snaps to the opposite side, and the air supply valve body 19 moves to the air inlet. 6 and the exhaust valve body 16 opens the exhaust port 7. Such an operation cycle is repeated. The operation detector 34 detects vibration associated with the operation of the liquid pumping device 24. The life estimator 35 reaches a predetermined high level so that the air supply port 6 is opened and the exhaust port 7 is closed, and then reaches a predetermined low level and the air supply port 6 is closed and the exhaust port 7 is opened. On the basis of the time (T) until the time is reached, an alarm is issued to notify that the life is approaching when the time (T) exceeds, for example, 1.2 times as a predetermined threshold value compared to the initial time.

  INDUSTRIAL APPLICATION This invention can be utilized for the monitoring system of the liquid pumping apparatus which pumps the liquid which generate | occur | produced with various vapor | steam using apparatuses to a liquid pumping destination by working gas.

DESCRIPTION OF SYMBOLS 1 Main body 2 Lid 6 Air supply port 7 Exhaust port 8 Inflow port 9 Pumping port 24 Liquid pumping device 34 Operation detector 35 Life estimation device

Claims (1)

The closed container is provided with an inlet and outlet for working gas and an inlet and outlet for pressurized liquid. A float is placed in the sealed container. When the float reaches a predetermined level, the inlet is opened and exhausted. When the opening is closed and the working gas is supplied into the sealed container from the air supply port, the liquid in the sealed container is pumped from the pressure feed port, and when the float reaches a predetermined low level, the air supply port is closed and the exhaust port is closed. In the liquid pumping device in which the working gas in the sealed container is exhausted from the exhaust port and the liquid flows into the sealed container from the inflow port until the float reaches a predetermined high level, the vibration accompanying the operation of the liquid pumping device From the time from when the air supply port is opened and the exhaust port is closed until the next time the air supply port is closed and the exhaust port is opened Liquid pumping Monitoring system of the liquid pumping apparatus characterized by comprising a life estimator for estimating the location of life.

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