JP2002005076A - System for controlling operation of drainage pump cart - Google Patents

Abstract

PROBLEM TO BE SOLVED: To sequentially operate a plurality of submergible pumps coupled in series in such a proper timing that bad conditions such as inability of discharge due to crush of a drainage hose, pump failure, etc., are not generated. SOLUTION: When a plurality of submergible pumps 2 submerged into water from a drainage cart coupled in series are successively started from a preceding pump 2A positioned upstream in the drainage direction to a following pump 2B positioned downstream, the water level discharged into a drainage hose 6 from the preceding pump 2A is detected by a operation signal of a pressure sensor 21 so as to judge whether or not the water level has reached a required suction level for the following pump 2B. The following pump 2B is automatically started based on the water detection signal by a portable wireless controller 15 which can receive and send radio signals to an operation control board 5 or the drainage pump cart 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pump operation control system for a drainage pump truck used for emergency drainage at the time of a water disaster, drainage for civil engineering temporary work, or water supply and drainage for agriculture. A plurality of submersible pumps mounted on a drain pump truck are connected in series via a drain hose and are put into the water from the drain pump truck, and these put submersible pumps are upstream in a predetermined drain direction. The present invention relates to a pump operation control system for sequentially operating from the one located on the side to the one located on the downstream side.

[0002]

2. Description of the Related Art In order to sequentially operate (start) a plurality of submersible pumps which are put in water from a drainage pump car and are connected in series from a pump located on an upstream side in a drainage direction, conventionally, an upstream in a drainage direction is conventionally used. With the operation of the preceding submersible pump located on the side, the state of flowing water discharged from the preceding submersible pump to the drainage hose is visually observed, and when it is determined that the drainage hose is full by visual inspection of the flowing water, the next subsequent submersible pump is turned on. For example, a series of pump operation control operations such as starting timing and starting operation of a plurality of submersible pumps, such as starting, are performed manually (manually) depending on visual judgment of an operator.

[0003]

However, in the case of the manual pump operation control method as described above, the start timing of the submersible pump tends to be shifted. For example, if the subsequent submersible pump is started before the drain hose connected to the discharge side of the preceding submersible pump is full, that is, if the starting timing is too early, the suction pressure of the subsequent submersible pump causes If the submersible pump suction side part is crushed, pumping by the subsequent submersible pump becomes impossible, it becomes impossible to continue predetermined drainage, excessive load is applied to the preceding submersible pump, and it is easy to cause pump failure etc. In addition, there is a problem that the subsequent submersible pump enters a so-called idle operation state, and the drive motor incorporated in the pump is heated and burned.

[0004] Further, in the case where one of a plurality of submersible pumps connected in series during normal operation fails or falls into an abnormal state, and water supply becomes impossible or water supply shortage occurs, the submersible pump with the failure etc. If the operation of the submersible pump located downstream of the submersible pump is not stopped as soon as possible, not only the drainage hose will be crushed due to the suction negative pressure of the downstream submersible pump and the specified drainage cannot be continued, but also the downstream submersible pump will malfunction. However, it is very difficult for the conventional pump operation control method by manual operation to immediately respond to such a situation. Furthermore, by using a synchronous motor to drive multiple submersible pumps,
Although the rotation speed of each pump can be arbitrarily adjusted according to changes in operating conditions, etc., it is difficult to visually check changes in operating conditions etc. when the drainage distance is extremely long. Therefore, there is also a problem that a function of adjusting the pump rotation speed in accordance with the pump operation state cannot be sufficiently utilized.

[0005] The present invention has been made in view of the above circumstances, and sequentially operates a plurality of submersible pumps at appropriate timing so as not to cause a pumping failure or a pump failure due to a collapse of a drainage hose. It is another object of the present invention to provide a pump operation control system for a drainage pump truck that can accurately and easily perform operation stoppage in the event of a pump failure or the like and adjustment of the rotation speed corresponding to a change in the pump operation state. And

[0006]

In order to achieve the above object, a pump operation control system for a drainage pump truck according to the present invention comprises a plurality of submersible pumps incorporating a drive motor, and these submersible pumps are connected in series. The plurality of submersible pumps are put into water from a drain pump truck loaded with a plurality of drain hoses to be connected and a pump drive power supply device for supplying drive power to the drive motors of the plurality of submersible pumps. A pump operation control system in a drainage pump truck that performs drainage in a predetermined direction by sequentially operating the supplied submersible pumps, wherein the preceding submersible pump located upstream in the drainage direction is operated after the preceding submersible pump is operated. As a condition for starting the succeeding submersible pump located downstream of the submersible pump, the running water discharged from the preceding submersible pump to the drain hose is A means is provided for taking in running water detection information as to whether or not a predetermined suction position by the pump has been reached, and when the starting condition of the succeeding submersible pump is satisfied with the running water detection information taken in through this means, the subsequent submersible pump is drained. A plurality of submersible pumps can be sequentially operated by automatically starting up via a portable wireless controller capable of wireless transmission and reception between a control panel mounted on a pump car or a drainage pump car. It is characterized by the following.

[0007] According to the system of the present invention having the above configuration, of the plurality of submersible pumps in series connected to the water from the drain pump car, the submersible pump connected to the discharge side of the upstream pump on the upstream side in the drain direction is driven by the operation of the preceding pump. The running water discharged into the drainage hose, which has flowed toward the downstream side of the hose, takes in the running water detection information as to whether or not the running water has reached a predetermined suction position by the succeeding pump. By automatically activating each pump,
It is possible to start the pump at an appropriate timing that does not cause the drainage hose to collapse, thereby avoiding the failure of pumping due to the subsequent pump due to the collapse of the drainage hose and the occurrence of malfunctions such as pump failures. The submersible pumps can be started normally and smoothly sequentially from the one located upstream in the predetermined drain direction to the one located downstream in the predetermined drain direction, and the predetermined drain operation can be reliably performed.

[0008] Further, by providing a portable wireless controller capable of wireless transmission and reception between the drainage pump and the drainage pump, even if the drainage distance is extremely long, an arbitrary terminal such as a drainage terminal located away from the drainage pump is provided. It is possible to check the drainage state, pump operation state, and the like while staying at the location. In particular, by providing the portable wireless controller with a function of monitoring at least the operating states of the plurality of submersible pumps and the function of stopping the operation of the plurality of submersible pumps, It is possible to collectively monitor and manage the operating status of two submersible pumps at a remote location away from the drainage pump truck, and when a certain pump breaks down or malfunctions during normal drainage operation, the downstream side of it Not only can the pump operation be stopped immediately to prevent the occurrence of malfunctions such as the collapse of the drainage hose or the spread of failures to the downstream pump, but it is also possible to easily check changes in the operating conditions of the pump from a distance. For example, the number of rotations of each submersible pump can be arbitrarily adjusted in response to a change in the situation to improve drainage efficiency and drainage efficiency.

In the pump operation control system for a drainage pump car as described above, the running water detection information taken in as the starting condition of the subsequent submersible pump is, as described in claim 2, a predetermined one of the plurality of submersible pumps. 4. An operation signal of a pressure sensor or a flowing water sensor installed at a suction or discharge position of the water, or a running water calculated in advance based on an input of a length and an average gradient (known) of a drain hose as described in claim 3. It may be any of the end time signals of the arrival time. In the former case, in particular, the existing pressure sensor or running water sensor is used, and it is only necessary to install this at the suction or discharge port of each submersible pump, and it is structurally simple and cost-effective. be able to.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 and 2 show an example of a drainage pump truck 1. This drainage pump truck 1 is a truck type and outputs the output of an engine (not shown) mounted on the vehicle body to a driving wheel 9 via a well-known power transmission system. Is transmitted or transmitted to stop or run. A plurality of lightweight submersible pumps 2 are mounted on the bed 1A of the truck-type drainage pump truck 1.
And a plurality of drainage hoses 6 for directly connecting these lightweight submersible pumps 2 and an electric motor 3 (an example of a drive motor, which may be a hydraulic motor) incorporated in each lightweight submersible pump 2. Power generator 4 for supplying driving power
(An example of a power supply device for driving a pump), an operation control panel 5 electrically connected to the power generator 4, and an electric motor 3 for driving the operation control panel 5 and each light-weight submersible pump 2. And a control cable 14 for electrically connecting the operation control panel 5 to a pressure sensor (described later) installed at the suction port of each lightweight submersible pump 2 and the like. The output of the engine operated while the drain pump car 1 is stopped is a PTO (power take-off) clutch-equipped power take-out device # 10
Is transmitted to the power generation device 4 via the power supply to drive the power generation device 4.

On the operation control panel 5 of the pump 1, as shown in FIG. 3, there is provided a wireless communication device having a size and weight that can be carried by the worker M via a shoulder suspension belt 16. A transceiver 17 capable of transmitting and receiving a radio signal to and from a transceiver (wireless controller) 15 is attached. The portable wireless controller 15 includes a volume switch 18 that can adjust the number of rotations of the plurality of lightweight submersible pumps 2 and a stop button switch 19 that can operate to stop the operation of each lightweight submersible pump 2. The operation control panel 5 has a function of wirelessly transmitting operation signals from the transmitters 18 and 19 to the transmitter / receiver 17 on the drainage pump car 1 side, and has a function of wirelessly transmitting the operation signals from the transmitter / receiver 17 on the drainage pump car 1 side. It has a function of monitoring the operating state of each lightweight submersible pump 2 by receiving signals such as the degree of pressure increase of each lightweight submersible pump 2 and an alarm and displaying them on the display unit 20.

The lightweight submersible pump 2 mounted on the drainage pump truck 1 has, for example, a diameter of 150 mmφ and a drainage volume of 2.5 m ^3.
/ Min × Head 20m × Electric motor output 11.0KW ×
It is about 30 kg in weight and is designed to be capable of loading, unloading, transporting, throwing into water, and pulling up by one worker. Are stored in the storage space 11 together with the cabtire cable 7 and the control cable 14 in the storage space 1A.

As shown in FIG. 4, the lightweight submersible pump 2
For example, a coupling 12 for connecting a hose called a bamboo shoot is provided on the discharge side, and the strainer 1 is provided on the suction side.
3 and a first lightweight submersible pump 2A disposed and used at the most upstream side in the drainage direction during drainage work, and a hose connection called bamboo shoot on both the discharge side and the suction side as shown in FIG. And a plurality of second lightweight submersible pumps 2B that are used by being sequentially connected to the downstream side of the first lightweight submersible pump 2A via the drain hose 6 during drainage work. Pressure sensors 21 for obtaining flowing water detection information for detecting whether or not flowing water in the drainage hose 6 reaches the suction opening 2b, respectively, at the suction opening 2b of the second lightweight submersible pump 2B. Is installed.

A pressure sensor 22 is also provided at the suction port 2a of the first lightweight submersible pump 2A. When the first lightweight submersible pump 2A is put into the water, the pressure sensor 22 determines whether or not the water level at the point where the first lightweight submersible pump 2A is put into water and the water pressure (water volume) acting on the suction port 2a is higher than a predetermined value. Is detected, and when a water pressure equal to or higher than a predetermined value is detected, the first lightweight submersible pump 2A is activated.

The running water detection information, which is the operation signal of the pressure sensor 21 installed at the suction port 2b of the second lightweight submersible pump 2B, is transmitted through the control cable 14 to the drain pump car 1
Is transmitted to the operation control panel 5 side, and the operation control panel 5 determines whether or not the starting condition of the second lightweight submersible pump 2A is satisfied based on the acquired running water detection information. An activation signal is transmitted to the electric motor 3 for driving the lightweight submersible pump 2A through the cabtire cable 7.
On the other hand, the transmitter / receiver 17 on the side of the drainage pump car 1 is configured to transmit a radio signal indicating the operating state of each of the lightweight submersible pumps 2A and 2B by the operation control panel 5 and the presence or absence of a failure to the radio controller 15. .

Next, a description will be given of a pump operation control operation in the drainage pump truck 1 configured as described above. Here, in order to make the control operation easy to understand, the first lightweight submersible pump 2A (hereinafter, referred to as a preceding pump) and 1
And a second lightweight submersible pump 2B (hereinafter, referred to as a subsequent pump) connected in series via a drain hose 6 (hereinafter, referred to as a first drain hose).
A description will be given of the pump operation control operation in the case where drainage in a predetermined direction is performed with the drainage hose 6 (hereinafter, referred to as a second drainage hose) connected to the discharge side of B. It is needless to say that the operation control operation when the are connected in series is almost the same.

The drainage pump truck 1, which has traveled to the vicinity of the shore of the drainage site, is stopped near the shore, and the electric motors 3, 3 of the two pumps 2A, 2B and the operation control panel 5 are connected to the cabinet.
And the pressure sensors 22 and 21 installed in the suction ports 2a and 2b of both pumps 2A and 2B and the operation control panel 5, respectively.
4 and 14, and the first and second
As shown in FIG. 6, the leading pump 2A and the trailing pump 2B connected in series through the drain hoses 6 and 6 of FIG.
Put in water.

When the pressure sensor 22 of the preceding pump 2A which has been put into the water detects a water pressure equal to or higher than a predetermined value, the starting condition of the preceding pump 2A is satisfied, and the operation control panel 5 is operated by operating the operation control panel 5 in this state. By activating the pump 2A, water is discharged from the preceding pump 2A into the first drainage hose 6. Then, the running water discharged into the first drainage hose 6 and pumped through the drainage hose 6 is supplied to the subsequent pump 2B.
When the pressure sensor 21 reaches the suction port 2b, the pressure sensor 21 is activated, and the running water detection information as the operation signal is transmitted to the control cable 1.
4 and transmitted to the operation control panel 5 of the drainage pump car 1 to establish the starting condition of the succeeding pump 2B.

When the start condition is satisfied, the operation control panel 5
Then, a start signal is transmitted to the driving electric motor 3 of the succeeding pump 2B through the cabtire cable 7, the subsequent pump 2B is started, and water is discharged from the subsequent pump 2B into the second drainage hose 6. Accordingly, drainage in a predetermined direction is performed by operation of both the leading pump 2A and the trailing pump 2B.

As described above, the starting condition of the succeeding pump 2B is obtained by taking in the running water detection information that the flowing water discharged from the preceding pump 2A reaches the suction port 2B of the succeeding pump 2B as the starting condition of the succeeding pump 2B. First drain hose 6 generated due to timing being too early
This prevents a failure such as a pump failure or a pump failure caused by the collapse of the first drainage hose 6 due to the collapse of the first drainage hose 6, and the two pumps 2A and 2B are sequentially started normally and smoothly at appropriate timing. Thus, the predetermined drain operation can be reliably performed.

At the same time, the operation control panel 5 on the drain pump car 1 side
The operation signal and alarm signal of each of the pumps 2A and 2B are wirelessly transmitted from the transceiver 17 to the wireless controller 15 carried by the operator and displayed on the display unit 20, so that the operator can use the drainage pump 1 It is possible to collectively monitor and manage the operating state such as the degree of pressure increase of the pump while staying at a remote location away from the vehicle.

When a failure or abnormality occurs in the preceding pump 2A during a predetermined drain operation, the operation signal is transmitted wirelessly by operating a stop button switch 19 provided in the wireless controller 15. The operation is transmitted to the operation control panel 5 of the vehicle 1 and the operation of the subsequent pump 2B can be immediately stopped, and the occurrence of a failure such as the collapse of the first drainage hose 6 and the spread of a failure to the subsequent pump 2B can be prevented. Not only can prevent the two pumps 2A, 2
You can easily check the change of driving situation of B while being far away,
For example, by operating the volume switch 18, the rotation speeds of the pumps 2A and 2B can be arbitrarily adjusted in response to a change in the situation to control the operation state without difficulty and in an efficient operation state.

In the above embodiment, the pressure sensor 21 is provided at the suction port 2b of the second lightweight submersible pump 2B as a means for obtaining the flowing water detection information. A running water sensor may be installed. Further, the location where the pressure sensor 21 and the flowing water sensor are installed is not limited to the suction port 2b of the second lightweight submersible pump 2B, but may be the discharge port thereof.

Further, a drain hose 6 laid at the time of drainage is provided.
If the length and the average gradient are known or can be easily calculated on site, the hose length and the average gradient are input to the operation control panel 5 (corresponding to the first drainage hose in the above description of the control operation). By doing so, the subsequent pump 2
The arrival time of flowing water to the suction port portion 2b of B is calculated in advance, and time measurement is started by using a timer (not shown) at the same time as the start of the preceding pump 2A, and a timing end signal of the calculated arrival time of flowing water ( This may be a means for starting the subsequent pump 2B based on the flowing water detection signal).

In the above embodiment, the running water detection information is used as a start condition, and when the start condition is satisfied, the succeeding pump 2B is automatically controlled via the operation control panel 5 mounted on the drainage pump car 1. In the above description, the running water detection information is taken into the wireless controller 15 side, and when the running condition is satisfied by the taken running water detection information, the operation control panel 5 of the drainage pump car 1 is sent from the wireless controller 15 side. The start signal may be transmitted wirelessly to the side.

[0026]

As described above, according to the present invention,
In performing a predetermined drainage operation by sequentially starting a plurality of submersible pumps in series connected into the water from a drainage pump truck from a preceding pump located upstream in a draining direction to a succeeding pump located downstream. By automatically starting the succeeding pumps with running water detection information as to whether or not the flowing water discharged into the drain hose and flowing along with the operation of the preceding pump has reached a predetermined suction position by the succeeding pump, The subsequent pump can be started at a uniform and appropriate timing set so that the suction pressure of the succeeding pump does not cause the drainage hose to be crushed. By this, a plurality of submersible pumps can be started normally and smoothly sequentially to reliably perform a predetermined drainage operation by avoiding the occurrence of a failure such as inability to pump by a subsequent pump due to the collapse of the drainage hose or a pump failure, etc. be able to.

In addition, by providing a portable wireless controller capable of wirelessly transmitting and receiving between the drainage pump and the drainage pump, even if the drainage distance is extremely long, an arbitrary terminal such as a drainage end remote from the drainage pump is provided. It is possible to check the drainage state, pump operation state, and the like while staying at the location. In particular,
This portable wireless controller is provided with a function for monitoring the operating states of a plurality of submersible pumps and a function for stopping the operation of a plurality of submersible pumps, so that the operating state of the plurality of submersible pumps can be controlled at a remote location away from the drain pump car. It is possible to collectively monitor and manage the pumps, and when a certain pump malfunctions or malfunctions during normal drainage operation, the operation of the pump on the downstream side is immediately stopped to collapse the drainage hose and downstream. In addition to preventing failures from spreading to the side pumps, it is possible to easily confirm changes in the operating conditions of the pumps from a distance and, for example, adjust the rotation speed of each submersible pump in response to changes in conditions. And the drainage efficiency and drainage efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a side view showing an example of a drainage pump truck applied to the system of the present invention.

FIG. 2 is a plan view of FIG.

FIG. 3 is a perspective view showing an example of a wireless controller in the system of the present invention.

FIG. 4 is a configuration diagram illustrating an example of a first lightweight submersible pump (preceding submersible pump).

FIG. 5 is a configuration diagram illustrating an example of a second lightweight submersible pump (subsequent submersible pump).

FIG. 6 is a conceptual diagram for explaining a drainage situation at a drainage site.

[Explanation of symbols]

 Reference Signs List 1 drainage pump truck 2 (2A) first lightweight submersible pump (preceding submersible pump) 2 (2B) second lightweight submersible pump (subsequent submersible pump) 3 electric motor (an example of drive motor) 4 power generator (for pump driving Example of power supply device) 5 Operation control panel 6 Drain hose 15 Wireless controller 21 Pressure sensor (Example of means for obtaining running water detection information)

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) E03F 5/22 E03F 5/22 F04B 49/00 F04D 13/12 Z F04D 13/12 F04B 49/02 311 ( 72) Inventor Hirohiko Furukawa 3-1-1, Nihonbashi Muromachi, Chuo-ku, Tokyo Headquarters of Kubota Tokyo Co., Ltd. (72) Inventor Tetsuo Aoki 3-3-1, Nihonbashi Muromachi, Chuo-ku, Tokyo Kubota Tokyo Head Office (72) Inventor Hiroyuki Kawakatsu 1-1-1, Nakamiya Oike, Hirakata City, Osaka Prefecture Kubota Hirakata Manufacturing Co., Ltd. In-house (72) Inventor Hideki Jinno 11-1 Haneda Asahimachi, Ota-ku, Tokyo Ebara Corporation (72) Inventor Takahiro Asamizu Tokyo 11-1 Haneda Asahi-cho, Ota-ku, Tokyo F-term in Ebara Corporation (reference) EA15 EA34 EA42

Claims (4)

[Claims] 1. A plurality of submersible pumps incorporating a drive motor, a plurality of drainage hoses connecting the submersible pumps in series, and a pump drive for supplying drive power to the drive motors of the plurality of submersible pumps A plurality of submersible pumps are put into water from a drain pump truck loaded with a power supply device for use, and a pump in a drain pump truck that performs drainage in a predetermined direction by sequentially operating these put submersible pumps. An operation control system, wherein after the preceding submersible pump located on the upstream side in the drainage direction is operated, the subsequent submersible pump located on the downstream side of the preceding submersible pump is started. A means is provided for capturing flowing water detection information as to whether or not the discharged flowing water has reached a predetermined suction position by the subsequent submersible pump. When the running condition of the succeeding submersible pump is satisfied by the incorporated running water detection information, the subsequent submersible pump is controlled via a portable wireless controller capable of wirelessly transmitting and receiving to and from a control panel mounted on the drain pump vehicle or the drain pump vehicle. Automatically start
A pump operation control system for a drainage pump truck, wherein a plurality of submersible pumps are configured to be sequentially operable. 2. The drainage pump vehicle according to claim 1, wherein the running water detection information is an operation signal of a pressure sensor or a running water sensor installed at a predetermined suction or discharge position of each of the plurality of submersible pumps. Pump operation control system. 3. The pump operation control in a drainage pump truck according to claim 1, wherein the running water detection information is a timing end signal of a running water arrival time calculated in advance based on input of a length and an average gradient of a drainage hose. system. 4. A portable wireless controller capable of wirelessly transmitting and receiving between said drain pump car and said portable wireless controller has at least a function of monitoring operation states of a plurality of submersible pumps and a function of stopping operation of a plurality of submersible pumps. The pump operation control system for a drainage pump truck according to any one of claims 1 to 3, wherein