JP3053232B2 - All water level pump equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in pump equipment for performing full water level operation, and more particularly to a full water level pump equipment suitable for rainwater pump equipment.

[0002]

2. Description of the Related Art In a sewer in an urban area, water is hardly drained when there is no rain due to maintenance of drainage channels and improvement of a pavement rate. However, when rain starts, a large amount of water flows in a short time. For this reason, the rainwater pump equipment is also designed to make the pump stand-by when the rain starts, and to perform the rated operation immediately when the water level rises. However, since the time of rainwater inflow to the rainwater pump equipment cannot be accurately predicted, the operation is considerably complicated.

In order to solve this problem, Japanese Patent Laid-Open Publication No. 1-3
No. 13696, which has a low water pump and a high water pump, connects the discharge pipe of the low water pump to the discharge pipe of the high water pump via a valve, and usually operates the low water pump. In the event of rainfall, the pumping of the low water pump is used as a priming and supplied to the high water pump through the discharge pipe of the high water pump.
Pump equipment for pumping rainwater increased by a high water pump is provided.

[0004]

However, such a method requires a significant change in equipment such as a pump and the renewal of all equipment.

The present invention is capable of responding to sudden rainwater inflows with little modification to existing equipment.
It is to provide a pump facility.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a method for starting a certain pump in a total water level pump equipment in which a plurality of pumps capable of operating at all water levels are installed.
And the detected drive source load is below the reference value.
Activates the timer while the machine is in operation and
Rolling condition was the maintained, after the lapse of time that is limited by the pump and drive source, to stop the operation of the pump, to activate the other pump, rated operation instruction or later
An operation sequence setting device is provided for sequentially setting one or more pumps in a standby operation for all the pumps installed up to a certain point .

[0007]

In the case where all water level pump equipment is, for example, rainwater pump equipment, when rainfall starts, the operation sequence setting device starts the first pump to perform standby operation. After the start of the first pump, if the standby operation time limited by the pump and the drive source has elapsed from the start, the operation of the first pump is stopped, and the second pump is started to perform the standby operation. Further, when the standby operation time limited by the pump and the drive source has elapsed from the start of the second pump, the operation of the second pump is stopped, and the third pump is started to perform the standby operation.
Thereafter, such a sequential operation is performed for all the pumps until a rated operation command is issued, and after the last pump is stopped, the first pump is started again.

[0008] The switching of the pump is performed every time a preset time elapses, which is limited by the type and structure of the pump and the drive source, for example, to perform a light load operation permitted for the diesel engine that drives the pump. This is done every time the dry rotation is allowed for the ceramic bearing. More specifically, when the pump drive source is a diesel engine, after starting a certain pump, the operation of this pump is stopped after the permitted light load operation time of the diesel engine has elapsed. At the same time, the other pumps are started, and thereafter, this sequential operation is performed for all of the pumps. If the bearing holding the main shaft of the pump is a ceramic bearing, after starting a certain pump, when the ceramic bearing has passed the allowable dry rotation time, the operation of this pump is stopped and the other pump is stopped. The pump is started, and thereafter, this sequential operation is performed for all of the pumps. When the driving source of the pump is a diesel engine and the bearing that holds the main shaft of the pump is a ceramic bearing,
After starting a certain pump, when the diesel engine has passed the allowable light-load operation time or the allowable dry rotation time of the ceramic bearing, whichever is shorter, the operation of this pump is stopped. Then, the other pumps are started, and this sequential operation is performed for all the pumps thereafter.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of a water level pump system according to the present invention.

The pump equipment described as an embodiment is a rainwater pump equipment. As shown in FIG. 1, this rainwater pump equipment includes, for example, three total water level vertical pumps 10 to 12. The main shaft of each pump is a speed reducer 13d-1
The output shaft of 5d and the input shaft of the speed reducer are connected to diesel engines 16d to 18d, respectively. Although not shown, the pump is disposed inside the water absorption tank, and is supported by members constituting the water absorption tank, and the speed reducer and the diesel engine are installed on a table disposed above the water absorption tank. I have.

Each of the pumps 10 to 12 has a pump casing 21 for accommodating an impeller 20, as shown in FIG. A suction bell 23 is connected to a lower end of the pump casing 21 via a casing liner 22. At the upper end of the pump casing 21, a lower pumping pipe 24 is provided.
Is connected. The upper end of the lower lift pipe is underwater bearing support 2
The upper pumping pipe 26 is connected to the upper pumping pipe 5 via an interposition 5 and an elbow 28 is connected to the upper pumping pipe via a support 27. The main shaft 29 is a bearing 2 incorporated in the underwater bearing support 25.
5A. This underwater bearing is made of a known ceramic bearing. The lower end of the main shaft 29 is connected to the impeller 20, and the upper end passes through the elbow 28,
It is held by bearings in the elbow 28. The end of the main shaft 29 extending from the elbow 28 to the outside is connected to the output shaft of the speed reducer.

In this pump, a suction bell 23, a casing liner 22, a casing 21, pumping pipes 24 and 26, and a submerged bearing support 25 are arranged inside a water absorption tank, and a support 27 is provided. The elbow 28 is supported by a member constituting the water absorption tank, and the elbow 28 is connected to the discharge tank. An intake pipe 30 is arranged on a side surface of the pump. The lower end of the intake pipe is connected to a suction bell 23. The opposite end is connected to an air supply device via an intake control valve 31.

When the diesel engine rotates the main shaft 29, the impeller 20 rotates together with the main shaft, and the water in the water absorption tank is sucked from the bell 23 and discharged to the discharge tank through the elbow 28. At this time, the amount of drainage can be adjusted by sending air from the intake pipe 30 to the bell 23.

Returning to FIG. 1, the rainwater pump equipment is provided with an operation sequence setting device 40. The device itself includes a microprocessor, a timer, and the like, and is connected to devices 41 to 43 for starting and stopping the diesel engines 16d to 18d. When a standby operation command is input, the devices 41 to 43 are sequentially transmitted to the devices 41 to 43. The diesel engines 16d to 18d associated with each of the devices 41 to 43 are output in a standby operation sequentially for a time set by the timer. The device 40 is further connected to sensors for detecting the discharge pressure of the pump, the discharge flow rate, the fuel consumption rate of the diesel engine, the explosion pressure of the combustion chamber, the temperature of the cooling water, etc., and is activated after a certain pump is activated. It is determined whether the pumps 10 to 12 are in the idling operation state and the diesel engines 16d to 18d are in the light load operation state based on the signals from the pump and engine sensors that have been set. This operation state is continued. The set time of the timer is the limit time during which the diesel engines 16d to 18d can operate at a light load determined from the fuel consumption rate, the explosion pressure of the combustion chamber, the cooling water temperature, or the dry operation time that the bearing 25A can perform, that is, This is the shorter of the allowable dry operation time experimentally determined from the PV value of the bearing.

The operation of the rainwater pump equipment will be described. When there is rain and a standby operation command is input to the device 40, the device 40 outputs a signal for starting the engine 16d to the device 41, and the engine 16d starts. At this time, the pump 10 since the water level is started at a lower than the pumping start water level s of FIG. 1, the bearing 25A is dry-start, the diesel engine 16 d has a light load operation. When the pump 10 is activated, device 40, the data from the sensors in the pump 10 or the engine 16d is compared with the reference data in the device 40, is enabled with the engine 16d pump 10 is in idle operating state if at light loads For example, a timer is operated, and a signal for maintaining the standby operation state is output to the device 41. When the time set in the timer elapses, the device 40 outputs a signal for stopping the engine 16d to the device 41, and outputs a signal for starting the engine 17d to the device 42. Then, when the pump 11 starts, the device 40 starts the timer if the pump 11 is idling and the engine 17d is in the light load operation state, maintains the standby operation of the pump 11 , and sets the timer. Over time, and outputs a signal for stopping the engine 17 d in the apparatus 42, at the same time the engine 18d
Is output to the device 43, and the pump 12 is operated in standby mode. In this case, device 40 comprises a pump 1
2 is idle operation and the engine 18d is in a light load operation state, the timer is operated, and when the time set in the timer elapses, a signal for stopping the engine 18d is output to the device 43, and at the same time, the engine 16d Is output to the device 41, and the pump 10 is again operated in the standby mode. Thereafter, the device 40 operates the engines 17d and 18d sequentially until the rated operation command is input.
2 are sequentially operated in standby mode, and these operations are repeated until there is a rated operation command. On the other hand, when any of the pumps 10 to 12 is in standby operation, for example, when the pump 12 is in standby operation, when a rated operation command is input,
The device 40 outputs a signal to the start / stop device 43 and outputs the signal to the engine.
18 d is operated at the rated load.

The rainwater pump system according to the present invention can cope with a sudden inflow of rainwater simply by changing the operation method of the pump. Therefore, it is necessary to renew or significantly change existing facilities. In addition, the cost is extremely low and the pump can be operated even if there is a power outage. Stand-by operation can be performed for a long time without damaging, and even if a sudden rise in water level causes many pumps to be started at one time, the need for preheating of the engine can be reduced without requiring preheating. Many pumps can be started up over time, and they have excellent corrosion resistance, are maintenance free, and have a dry start. It can be employed ceramic bearings, be employed, heat the bearing - without generating an accident Tokurakku and bearing cracks, etc., since allows for a long period of time standby operation, driving operation it is also extremely easy.

FIG. 3 shows another rainwater pump system according to the present invention. In this rainwater pump facility, when the load of the engine is detected and the time related to the amount related to the limit of light load operation is exceeded, the pumps are switched so that the standby operation can be sequentially performed more precisely. It is made to be.

This rainwater pump system also has a vertical water pump 10 driven by diesel engines 16d to 18d.
To 13d. However, the pump 10-13d
The underwater bearing, denoted by reference numeral 25A in FIG. 2, is a rubber bearing. And the engine 16d-1
Each of the sensors 8d includes sensors 54 to 55 for detecting a fuel consumption rate, a combustion chamber explosion pressure, a cooling water temperature, and the like.

The operation sequence setting device 50 includes a microprocessor, and includes these sensors 54 to 56, sensors (not shown) for detecting the discharge pressure and flow rate of the pump,
In addition, diesel engine drive stop devices 51 to 53
After starting a certain engine, data such as the discharge pressure and flow rate of the pumps 10 to 13d, the fuel consumption rate of the diesel engines 16d to 18d, and the explosion pressure of the combustion chamber are used as reference data. It is determined whether the currently operated pump is idling and the engine is in light load operation. If the pump is idling and light load operation, the data of this engine and the reference data are determined. Are controlled while maintaining the light load operation state, and when the reference data is exceeded, the devices 51 to 54 are switched to switch to another engine. explain in detail.

When a standby operation command is input to the operation sequence setting device 50, the device 50 transmits the engine 1
A signal for starting 6d is output, and the pump 14d is operated in standby mode. When the standby operation is started, the water level is equal to or lower than the minimum water level at which pumping starts (pumping start water level), so that the impeller does not submerge and the pump 14d enters an idling operation state. Even if water is pumped, the pump 14d is in an idling operation or in a state similar to this because it is not sufficiently submerged and cannot pump water. The power consumption of the diesel engine 16d is also very small as compared with the rated operation, and the load is a small value of about several percent as compared with the rated operation.

The operation sequence setting device 50 includes a start / stop device 5
1 outputs a signal for starting the engine 16d, and then outputs a signal from the pump 14d and the sensor 5 in the engine 16d.
When it is determined that the pump 10 is in the idling operation state and the engine 16d is in the light load operation state based on the signal from the controller 4, the data based on the signal from the sensor 54 is compared with the reference data. Meanwhile, a signal for causing the engine 16d to perform a light load operation is continuously output to the device 51. However, when the engine 16d reaches the light load operation limit, the device 50 outputs a signal to stop the engine 16d to the device 51, and outputs a signal to start the engine 17d to the device 52 at the same time.
d, it is determined by reference to the reference data whether the vehicle is in the idling or light load operation state based on the signal from the sensor 55.
In the idling and light load operation state, the engine 17d is operated at a light load while comparing the signal from the sensor 55 with the reference data. When the engine 17d reaches the light load operation limit, the device 50 outputs a signal to stop the engine 17d to the device 52, and simultaneously outputs a signal to start the engine 18d to the device 53. Also at this time, the device 50
If the pump 12 is in the idling operation state and the engine 18d is in the idling operation state, the light load operation of the engine 18d is continued while comparing the signal from the sensor 56 with the reference data. Further, when the engine 18d reaches the light load operation limit, the device 50 outputs a signal to stop the engine 18d to the device 53, and outputs a signal to start the engine 16d to the device 51 at the same time, and the pump 10 is in the idling operation state. If there is and the engine 18d is in the light load operation, the engine 16d is caused to continue the light load operation state. If the rated operation command is present in the device 50 during the sequential standby operation of these engines, the device 50 outputs to the start / stop device a signal for performing the rated operation of the engine in the standby operation at that time. However, if there is no rated operation command, the pump 10 is caused to stand by, and then the pumps 11, 1
2 are sequentially operated in a standby state, and thereafter, the standby operations of the pumps 10 to 11 are sequentially repeated.

FIG. 4 shows still another rainwater pump system. In this rainwater pump facility, the bearing temperature is detected, and the pump is switched every time a time related to the time required to reach the temperature allowed for the bearing elapses, so that the standby operation can be sequentially performed more precisely. It is made to be.

This rainwater pump equipment also has three total water level pumps 10 to 13. However, the pumps 10 to 13
Each of the electric motors 17 is provided with speed reducers 13 m to 16 m interposed therebetween.
m to 19 m. The underwater bearings incorporated in each of the pumps are ceramic bearings, and each of the ceramic bearings has temperature sensors 64 to 66 embedded therein.

The operation sequence setting device 60 includes a microprocessor, and is connected to these temperature sensors 64 to 66, sensors (not shown) for detecting the discharge pressure and flow rate of the pump, and the motor driving devices 61 to 63. Each time the bearing temperature elapses relative to the critical temperature at which heat cracks do not occur in the ceramic.
To 13 are sequentially performed. explain in detail.

When a standby operation command is input to the operation sequence setting device 60, the device 60 is connected to the start / stop device 61 by the electric motor 16.
When the motor 16m starts and the motor 16m starts, the data from the sensor 64 and the sensor of the pump 10 are compared with the reference data, and the bearing temperature is below the reference value and the pump 10 runs idle. In the state, the device 61 is controlled so that the pump 10 performs the idling operation. Device 60
During the idling operation, the signal from the sensor 64 in the ceramic bearing of the pump 10 is transmitted to the rated operation data in the device 60.
When the bearing temperature of the pump 10 exceeds the limit value, a signal to stop the motor 16m is output to the device 61, and a signal to start the motor 17m is simultaneously output to the device 62.
And the bearing temperature is below the reference value and the pump 12
Is in the idling operation state, the device 62 is controlled so that the pump 11 maintains the idling operation. The device 60 includes the pump 1
When the bearing temperature exceeds the reference value, a signal for stopping the motor 17m is output to the device 62, and a signal for starting the motor 18m is output to the device 63, and the pump 13 is started. And if the pump 12 is in the idling operation state, the idling operation of the pump 12 is maintained while the signal from the sensor 66 is equal to or lower than the limit value, and the signal for stopping the motor 18m when the bearing temperature exceeds the reference value. Is output to the device 63, and at the same time, a signal for starting the motor 16m is output to the device 61. Thereafter, until the rated operation command is input to the device 60, the device 60 sequentially repeats these standby operations so that the ceramic bearings incorporated in each pump do not reach the dangerous temperature.

[0026]

As described above, the pump apparatus of the present invention for all-water level operation can perform standby operation for sudden rainwater inflow without changing existing equipment such as a pump, thereby reducing costs. The operation is very easy because it is extremely low and can employ a pump drive source composed of a diesel engine or a non-water bearing such as a ceramic bearing.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a configuration of an embodiment of a full water level pumping facility of the present invention.

FIG. 2 is an explanatory view showing a configuration of a vertical pump in FIG. 1;

FIG. 3 is an explanatory diagram showing the configuration of another embodiment of the full water level pump equipment of the present invention.

FIG. 4 is an explanatory diagram showing a configuration of still another embodiment of the full water level pump equipment of the present invention.

[Explanation of symbols]

10-12 ... pump 40, 50, 60 ... operation sequence setting system

Continuation of the front page (72) Inventor Tomohiro Sato 4-6 Kanda Surugadai, Chiyoda-ku, Tokyo Hitachi, Ltd. (56) References JP-A-2-283896 (JP, A) JP-A-62-142890 (JP) , A) Fully open 60-178395 (JP, U) Fully open 60-125398 (JP, U) (58) Fields studied (Int. Cl. ⁷ , DB name) F04D 13/00 F04D 15/00

Claims (4)

(57) [Claims] 1. A pump is started in an all-level pump facility in which a plurality of pumps capable of operating at all levels are installed.
And the detected drive source load is below the reference value.
Activates the timer while the machine is in operation and
Rolling condition was the maintained, after the lapse of time that is limited by the pump and drive source, to stop the operation of the pump, to activate the other pump, rated operation instruction or later
An all-level operation pump system, comprising: an operation sequence setting device that sequentially operates one or more pumps in a standby manner for all pumps installed until a certain time . 2. In a water pump system in which a plurality of pumps capable of operating at all water levels are installed and a pump driving source is a diesel engine, a pump is started and a check is performed.
The emitted diesel engine load is below the reference value
In standby operation, activate the timer and
To maintain the machine operating state, after the lapse of the light load operation time allowed for a diesel engine, to stop the operation of the pump, to activate the other pump, since Teikakuun
For all pumps installed until there is a turnover order ,
An all-water-level operation pump equipment comprising an operation sequence setting device for always operating one or more pumps in a standby operation. 3. In a water pump system in which a plurality of pumps capable of operating at all levels are installed, and a bearing for holding a main shaft is made of a ceramic bearing, a pump is started ,
Standby operation state where the detected drive source load is below the reference value
In this state, the timer is activated and this standby operation state
Was maintained, after the lapse of the allowed dry rotation time in ceramic bearings, to stop the operation of the pump, to activate the other pumps, there is a rated operation instruction later or
In order to the installed all pumps, total water level operating pump equipment, characterized in that it comprises a constantly operating order setting device for standby operation one or more units of the pump. 4. A total water level pump system in which a plurality of pumps capable of operating at all water levels are installed, a driving source of the pump is a diesel engine, and a bearing for holding a main shaft of the pump is a ceramic bearing. Activate the standby operation when the detected load of the drive source is below the reference value.
When the timer is running, the
When the condition is maintained and the light load operation time permitted for the diesel engine or the dry rotation time permitted for the ceramic bearings, whichever is shorter, has elapsed, the operation of this pump is stopped and the other pumps are stopped. An all-water-level operation pump system, comprising: an operation sequence setting device which starts up and sequentially operates one or more pumps in sequence for all installed pumps until a rated operation command is issued thereafter .