JP2013029041A - Device and method for treatment of drain - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device and method for treatment of drain, capable of properly performing drain treatment.SOLUTION: The drain treatment device 10 of this embodiment includes: a reservoir 20 for reserving liquid; a float sensor 30 for detecting a level of water as a first liquid in the reservoir 20; a wastewater treatment unit 40 capable of discharging the water in the reservoir 20 to the outside; and a controller 41 for discharging the water when the detected liquid level is continued in a high level state.

Description

  The present invention relates to a drain processing apparatus and a drain processing method.

  In vehicles such as construction and civil engineering machines, as part of maintenance, the drain cock of the fuel tank is opened to discharge water and dust. As a general vehicle drain process, the drain process is manually performed by visually checking the water level in the fuel tank and manually opening and closing a valve provided in the discharge unit.

  On the other hand, for example, in a pump device installed at home, in order to remove water entering the flow path, for example, fuel is stored in a fuel tank to separate the fuel and water and the water level in the fuel tank is reduced. There is provided an automatic drain treatment device that is provided with a detector for detection and is configured to open and close a valve of a drain portion of a fuel tank when a water level exceeds a predetermined liquid level.

JP 2003-342972 A

  However, the above-described technique has the following problems. That is, for example, when the fuel tank vibrates or tilts, the water level is likely to change, and the detection accuracy decreases. Therefore, automatic detection is difficult in an environment involving operation, and the accuracy of drain processing is reduced.

  The drain processing apparatus according to the embodiment includes a storage unit that stores liquid, a liquid level detection unit that detects a liquid level of the first liquid in the storage unit, and a first liquid in the storage unit that is outside the storage unit. And a control unit that discharges the liquid from the discharge unit when a state in which the detected liquid level in the storage unit is high continues.

  In the drain treatment method according to another embodiment, the liquid level in the storage unit capable of storing the liquid is detected, and the liquid is stored in the storage unit when the detected high liquid level in the storage unit continues. It is characterized by discharging to the outside.

  According to the drain processing apparatus and the drain processing method of the present invention, appropriate drain processing can be performed even in an environment involving operation.

The side view which shows the structure of the drain processing apparatus concerning one Embodiment. The block diagram which shows the system of the drain processing apparatus. Explanatory drawing which shows the electrical connection of the same drain treatment apparatus. The flowchart which shows the control procedure of the drain processing apparatus. The side view which shows the state which the drain treatment apparatus inclined. The flowchart which shows the control procedure of the drain processing apparatus concerning other embodiment.

  Hereinafter, a filtration device according to an embodiment of the present invention will be described with reference to FIGS. 1 to 4.

1 is a side view showing a configuration of a drain processing apparatus 10 according to the embodiment, FIG. 2 is a block diagram showing a system of the drain processing apparatus 10, FIG. 3 is an explanatory diagram showing electrical connections, and FIG. 4 is a drain processing apparatus. FIG. 5 is a flowchart showing a control procedure. In the figure, the Z direction indicates the vertical direction.

  A drain treatment apparatus 10 shown in FIG. 1 is installed at a lower portion of an oil / water separation filter 11 provided in a fuel circuit in, for example, a diesel engine vehicle or a construction machine. When the fuel passes through the oil / water separation filter 11, water droplets in the fuel aggregated and coarsened between the outer filter medium and the inner filter medium are accumulated in the drain treatment apparatus 10 provided below.

  The drain treatment apparatus 10 stores a storage unit 20 that stores liquids such as fuel F and water W, a float sensor 30 as a liquid level detection unit that detects a water level in the storage unit 20, and water W in the storage unit 20. And a wastewater treatment unit 40 that can be discharged to the outside.

  The storage part 20 is a hollow container having a bottom part 21 and a side wall part 22 and can store a liquid therein. The storage unit 20 is attached to, for example, a vehicle body frame. Inside the reservoir 20, fuel F (second liquid) such as light oil and water W (first liquid) mixed with the fuel F are stored and separated vertically by specific gravity. As shown in FIG. 1, the fuel F is stored in the upper part of the storage unit 20, and the water W is stored in the lower part of the storage unit 20. At this time, foreign matter such as dust or dust having a large specific gravity also accumulates in the lower part.

  A drain port (first liquid discharge port) 28 is formed in the bottom portion 21. The drainage port 28 communicates with the drainage channel 28a. A control box 29 is installed in the drainage channel 28 a below the storage unit 20, and a drainage processing unit 40 is accommodated in the control box 29.

  A float sensor 30 as a liquid level detection unit is provided inside the storage unit 20. The float sensor 30 has a float 31 that has a specific gravity between the fuel F and the water W and can move up and down according to the water level. The float sensor 30 detects water level information based on the position of the float 31 that is displaced according to the water level, and transmits the water level information to the control unit 41.

The waste water treatment unit 40 includes a control panel 42 equipped with a control unit 41, an electromagnetic valve 43 that opens and closes the drain channel 28 a under the control of the control unit 41, a battery 44 as a power source, and water W in the storage unit 20 on the discharge side. And a drainage pump 45 for performing drainage treatment to be sent to the vehicle. The control panel 42, the electromagnetic valve 43, the battery 44, and the drainage pump 45 are accommodated in the control box 29. As shown in FIGS. 43 and the drainage pump 45, and controls the drainage treatment by controlling the opening / closing operation of the solenoid valve 43 and the operation of the drainage pump 45. The control unit 41 is connected to the timer 46 and controls the operation timing of the electromagnetic valve 43 by operating the timer 46.

  The control unit 41 is connected to the vehicle body PC 16 provided on the vehicle body, the float sensor 30, the display device 17 provided on the vehicle body, and the like. The control unit 41 performs data processing based on various types of information including setting input information on the instrument panel 15 connected to the vehicle body PC 16 and detection information from the float sensor 30, and performs control to open and close the electromagnetic valve 43. At the same time, control is performed to display various information on the display 17.

  Since the drain treatment device 10 is provided in a vehicle such as a construction machine or a civil engineering machine, it may be inclined or vibrated depending on the operating environment. FIG. 4 is a cross-sectional view showing a state in which the reservoir 20 is inclined 35 degrees. When operated in this manner, a deviation occurs between the apparent water amount determined by the height of the float 31 and the actual water amount.

  Next, the control procedure of the drain processing method by the drain processing apparatus 10 according to the present embodiment will be described with reference to the flowchart of FIG.

  In the initial state, the electromagnetic valve 43 closes the drainage channel 28a, and the float sensor 30 is disposed between the water in the reservoir 20 and the fuel F.

  When the engine 14 is turned on, the control unit 41 first acquires liquid level information by the float sensor 30 (ST1). Then, it is determined whether or not the liquid level is higher than a predetermined high threshold (ST2). For example, the high threshold is set to a predetermined value that is about 2/3 of the height of the storage unit 20.

  When the detected water level is higher than the threshold value (YES in ST2), the control unit 41 activates the timer 46 to determine whether or not this high level state (a state where the detected water level is higher than the threshold value) continues for a certain period of time. Is detected (ST3). When it is below the threshold value in ST2 (No in ST2), the process returns to ST1 and the detection is repeated until a high-level state is detected. The continuous time is set depending on conditions such as the shape and size of the storage unit 20 and the operating environment. In the present embodiment, the continuous time is set to 10 seconds, for example.

  When the high level state continues for 10 seconds (YES in ST3), the control unit 41 opens the electromagnetic valve 43 and operates the drainage pump 45 to start the drainage process (ST4). Thereby, the water collected on the bottom of the storage part 20 is discharged | emitted outside through the drainage channel 28a.

  On the other hand, when not continuing for 10 seconds, the solenoid valve 43 and the drainage pump 45 are not operated and the process returns to ST1 again. Then, ST1 to ST4 are repeated.

  When the wastewater treatment is performed in ST3, the water level is detected while the electromagnetic valve 43 is opened and the wastewater is drained (ST5). When the water level drops due to drainage and falls below a predetermined low threshold (second threshold) set in advance, the solenoid valve 43 is closed and the drainage pump 45 is stopped to terminate drainage (ST6), and the process returns to ST1 again. . For example, the low threshold is set to a predetermined value that is about 1/3 of the height of the storage unit 20. The above operation is repeated until the engine 14 is turned off.

  According to the present embodiment, since the drainage is performed only when the high level state continues for a certain period of time under the control of the control unit 41, it is possible to prevent malfunction when the liquid level is unstable. That is, when the high level state does not continue for a certain period of time, the solenoid valve is not opened and the waste water treatment is not performed. Therefore, for example, when the apparent water level rises from the actual water level due to the inclination of the storage unit 20, Since the waste water treatment is not performed when the water surface is wavy due to the vibration of the unit 20, malfunction can be prevented.

  In this way, since it is possible to cope with a case where there is an inclination or vibration by setting the continuation for a certain period of time, additional equipment such as providing an inclination sensor or extending the stroke L of the float sensor becomes unnecessary. An appropriate drain process can be performed even when the storage unit 20 is operating without complicating the apparatus configuration.

  In addition, this invention is not limited to the said embodiment, A various deformation | transformation implementation is possible in the range which does not deviate from the summary of this invention. In addition, the specific configuration of each unit is not limited to that illustrated in the above embodiment, and can be changed as appropriate.

  For example, in the above-described embodiment, the case where the detection is continuously performed for a predetermined time is not limited to this. For example, as another embodiment, as shown in FIG. 6, the wastewater treatment may be performed when the high-level state is continuously detected a predetermined number of times (ST12). Even in this case, the same effect as that of the above embodiment can be obtained. Furthermore, the present invention can be realized even if some of the constituent features of the above-described embodiment are omitted.

  DESCRIPTION OF SYMBOLS 10 ... Drain processing apparatus, 11 ... Oil-water separation filter, 16 ... Vehicle body PC, 15 ... Instrument panel, 17 ... Indicator, 20 ... Storage part, 21 ... Bottom part, 22 ... Side wall part, 23 ... Cover part, 28 ... Drain Mouth (first liquid outlet), 28a ... drainage channel, 29 ... control box, 30 ... float sensor, 31 ... float, 40 ... wastewater treatment unit, 41 ... control unit, 42 ... control panel, 43 ... solenoid valve, 44 ... battery, 45 ... drain pump, 46 ... timer, F ... fuel, W ... water.

Claims (5)

A reservoir for storing liquid;
A liquid level detector for detecting the liquid level of the first liquid in the reservoir;
A discharge part capable of discharging the first liquid in the storage part to the outside of the storage part;
A control unit for discharging the liquid from the discharge unit when a state in which the detected liquid level in the storage unit is high continues;
A drain processing apparatus comprising: The storage unit stores fuel containing water, and separates the fuel and water contained in the fuel up and down,
The liquid level detecting means is a float sensor for detecting the liquid level of the water;
The drain processing apparatus according to claim 1, wherein the discharge unit discharges water accumulated in a lower portion of the storage unit.   The said control part performs the said discharge | emission when the high level state in which the liquid level in the said storage part becomes more than a 1st threshold value is detected continuously more than fixed time, The said discharge | emission is characterized by the above-mentioned. Drain processing device.   The said control part performs the said discharge | emission, when the high level state in which the liquid level of the 1st liquid in the said storage part becomes more than a 1st threshold value is detected continuously more than a fixed number of times. The drain processing apparatus according to 1 or 2. Detect the liquid level in the reservoir that can store the liquid,
When the state where the detected liquid level in the storage part is high continues, the liquid is discharged to the outside of the storage part.

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