JP2001027394A - Drainage discharging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect a water level accurately in a simple structure so as to discharge drainage surely. SOLUTION: A cover unit 2 is tightened to a main unit 1 opening an inflow port 4 in an upper part and an outflow port 5 in a lower part, a drain reservoir vessel having a drain accumulated part 3 in the inside is formed. The inflow/ outflow ports 4, 5 are connected to a drainage discharge pipe 6. The drainage discharge pipe 6 is provided with an automatic valve 7 in a secondary side of the outflow port 5. An ultrasonic wave transceiver 8 is mounted in a bottom part outer surface of the main unit 1 and connected to a control arithmetic device 9. The automatic valve 7 is also connected to the control arithmetic device 9. The control arithmetic device 9 controls the ultrasonic wave transceiver 8 at each prescribed time, radiates an ultrasonic wave toward upward from a bottom part outer surface of the main unit 1, detects a water level of the drain accumulated part 3 from the time till returning after reflected by the water level, generates an open control signal to open the automatic valve 7 when the water level reaches a prescribed high level, and generates a close control signal to close the automatic valve 7 when the water level reaches a prescribed low level.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for automatically discharging drain such as condensed water or condensed water generated in a steam, compressed air, or pressurized gas piping system, and more particularly, to an apparatus for discharging drainage from a drain reservoir. The present invention relates to a drain discharge device that opens and closes an automatic valve provided in accordance with a water level of a drain reservoir.

[0002] A drain trap is a device for automatically discharging drain such as condensed water and condensed water without releasing steam, compressed air and pressurized gas from a steam, compressed air and pressurized gas piping system. The trap is very troublesome because the size of the discharge hole must be selected depending on the amount of drain or the pressure of the piping system, and the trap is not suitable for discharging a large amount of drain due to the small discharge hole.

[0003]

2. Description of the Related Art In order to solve this inconvenience, a technique as shown in Japanese Utility Model Application Laid-Open No. 56-7198 has been conventionally used. This conventional technique detects the water level of the drain reservoir with an electrode rod attached through the top of the drain reservoir, and opens and closes an automatic valve provided on the secondary side of the drain reservoir, thereby draining. Is automatically discharged.

[0004]

However, the above-mentioned prior art has a problem that the structure becomes complicated because the electrode rod must be hermetically attached to the drain reservoir. Further, there is a problem that a magnetic substance such as iron powder or the like and a high-viscosity oil mist which flow down while being mixed with the drain adhere to the electrode rod, so that the water level detecting function is hindered. Therefore, a technical problem of the present invention is to provide a drain discharge device that can accurately detect the water level of a drain pool portion with a simple structure and reliably discharge drain.

[0005]

The means of the present invention taken to solve the above-mentioned problems are provided in a drain reservoir provided in the middle of a drain discharge pipe and on a secondary side of the drain reservoir. An automatic valve that opens and closes in response to a control signal, an ultrasonic transceiver mounted on the bottom outer surface of the drain reservoir, and an ultrasonic wave radiated upward from the ultrasonic transceiver is reflected by the water surface and returned. Water level detecting means for detecting the water level of the drain reservoir from the time until the water comes, and control signal generating means for generating a control signal for controlling the opening and closing of the automatic valve based on a signal from the water level detecting means. Drain discharge device.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention is directed to a drain reservoir from an ultrasonic wave radiated upward from an ultrasonic transmitter / receiver attached to a bottom outer surface of a drain reservoir portion until the ultrasonic wave is reflected by a water surface and returned. A control signal for controlling the opening and closing of an automatic valve provided on the secondary side of the drain reservoir is generated based on the detected water level, and the automatic valve is opened and closed based on the control signal. That is, since a member for detecting the water level is arranged on the outer surface of the drain reservoir, the water level of the drain reservoir can be accurately detected with a simple structure, and the drain can be reliably discharged. it can.

[0007]

FIG. 1 shows an overall configuration diagram of a drain discharge device according to the present invention. A lid 2 is fastened to the main body 1 to form a drain reservoir having a drain reservoir 3 inside. The main body 1 has an inlet 4 and an outlet 5, and the inlet 4 is a drain reservoir 3
The outlet 5 communicates with the lower part of the drain reservoir 3. The inflow port 4 and the outflow port 5 are connected to a drain discharge pipe 6. An automatic valve 7 driven by an electric motor, a pneumatic actuator or the like is provided on the secondary side of the outlet 5 to the drain discharge pipe 6.
Is provided.

[0008] An ultrasonic transmitter / receiver 8 is attached to the outer surface of the bottom of the main body 1 and connected to the control calculator 9. The automatic valve 7 is also connected to the control calculator 9. The control calculator 9 controls the ultrasonic transceiver 8 to detect the water level of the drain reservoir 3 and to generate a control signal to control the opening and closing of the automatic valve 7.

The control calculator 9 controls the ultrasonic transmitter / receiver 8 at predetermined time intervals to radiate ultrasonic waves upward from the bottom outer surface of the main body 1 and to reflect the water from the water surface until returning. Detects the water level in the drain reservoir 3 and generates an open control signal to open the automatic valve 7 when the water level reaches a predetermined high level, opens the automatic valve 7, and closes when the water level reaches a predetermined low level. A control signal is generated to close the automatic valve 7.

In the above embodiment, the open control signal is generated when the water level reaches a predetermined high level, and the close control signal is generated when the water level reaches a predetermined low level. However, a predetermined time has elapsed since the open control signal was generated. After the elapse, the closing control signal may be generated.

[0011]

According to the present invention, the water level of the drain reservoir is detected by using an ultrasonic transmitter / receiver attached to the outer surface of the bottom of the drain reservoir, so that the water level can be accurately detected with a simple structure, and the drain can be reliably discharged. A drain discharge device can be provided.

[Brief description of the drawings]

FIG. 1 is a sectional configuration diagram of a drain discharge device according to an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 2 Lid 3 Drain pool part 4 Inflow port 5 Outflow port 6 Drain discharge pipe 7 Automatic valve 8 Ultrasonic transceiver 9 Control arithmetic unit

Claims (1)

[Claims] A drain reservoir provided in the middle of a drain discharge pipe, an automatic valve provided on a secondary side of the drain reservoir and opened / closed in response to a control signal, and attached to a bottom outer surface of the drain reservoir. An ultrasonic transmitter / receiver, a water level detecting means for detecting a water level of a drain reservoir from a time until an ultrasonic wave radiated upward from the ultrasonic transmitter / receiver is reflected on the water surface and returns, and a water level detecting means And a control signal generating means for generating a control signal for controlling the opening and closing of the automatic valve based on a signal from the drain valve.