JP6715737B2 - Pump equipment, pump equipment operating method, and pump equipment controller - Google Patents

Description

The present invention relates to a pump facility, a pump facility operating method, and a pump facility control device.

At the pumping and drainage station, which is a flood control facility, a pump installed in a pump well, to which a pumping pipe and a discharge pipe are connected, a discharge valve provided in the discharge pipe, a prime mover that drives the pump, and a drive of the prime mover. Pump equipment is provided that includes a speed reduction mechanism that transmits force to the pump, a clutch mechanism that intermittently switches transmission of driving force via the speed reduction mechanism, and a clutch control unit that controls connection or disconnection of the clutch mechanism. ..

As a pump incorporated in such a pump facility, a pump with a very large drainage capacity is selected so that it can be drained to rivers etc. without flooding even if there is a record large amount of rainfall once every several decades. Has been done. Further, such a pump is drivingly connected to a gas turbine, an engine, or a prime mover such as an electric motor via a reduction mechanism.

When the water level in the pump well rises due to rainfall and the pump is started, draining with a pump with a large drainage capacity may cause the water level in the pump well to drop sharply depending on the amount of rainfall, and the pump stops accordingly. Even then, however, the water level in the pump well may suddenly rise and it may be necessary to restart the pump.

When a gas turbine or an engine is used as a prime mover for driving a pump, once the prime mover shifts to a stopping step, it must be stopped after a predetermined time of cooling operation. Therefore, once the water level in the pump well drops and the prime mover enters the shutdown process, it cannot start immediately even if the water level in the pump well rises, and the water level rises rapidly after drainage. There was a problem that the wells could not be drained. Moreover, since white smoke and black smoke are emitted from the exhaust pipe when the gas turbine or the engine is started, it is necessary to avoid frequent repeated start and stop from an environmental point of view.

Furthermore, when an electric motor is used as a prime mover for driving a pump, the electric motor generates heat due to a large current flowing at the time of starting, so that frequent start and stop of repetition are limited in order to avoid burnout of the electric motor.

Patent Document 1 discloses a pump and a pump for the purpose of providing a highly reliable pump facility that enables reliable start-up and continuous operation of the pump without stopping the prime mover even with large water level fluctuations. A driving prime mover and a fitting/removing means for connecting the rotating shaft of the prime mover and the pump rotating shaft to each other directly or indirectly so that they can be fitted or unfitted can be provided. Then, at the water absorption level below the impeller of the pump, the operation of the prime mover is started with the engagement/disengagement means removed, and when the water absorption level rises to the pump operation start water level above the pump impeller, A pump facility has been proposed, which is provided with a control unit that starts the operation of the pump by fitting the disconnecting unit at an arbitrarily adjusted fitting time.

According to the above configuration, the pump can be stopped by removing the fitting/removing means without stopping the prime mover, and can be started by fitting the fitting/removing means.

JP2012-77684A

However, when the engaging/disengaging means is disengaged, the water pumped up into the pumping pipe (suspending pipe) falls, the impeller of the pump rotates in the reverse direction, and the clutch plates forming the engaging/disengaging means rotate in opposite directions. This not only promotes wear of the clutch plate, but also causes a problem that torque in the opposite direction is transmitted to the prime mover side, which may cause the prime mover to stall or damage the prime mover.

Therefore, in the pump equipment described in Patent Document 1, a brake is provided between the fitting/removing means and the pump as a rotation suppressing mechanism for suppressing the rotation of the pump, and the reverse rotation of the pump is prevented when the fitting/removing means is fitted. It is configured to actuate the brake.

However, if the engagement/disengagement means is engaged with the brake being actuated, the clutch plate is rather worn, and an abnormal reverse torque may be applied to the prime mover, which may hinder the prime mover.

Further, since it is difficult to operate the brake promptly after the disengagement, there is also a problem that it is not possible to properly cope with the initial disengagement until the brake begins to work, that is, the clutch plates are not sufficiently separated and the wear is severe. there were.

In view of the above-mentioned problems, an object of the present invention is to provide pump equipment, a method for operating the pump equipment, and a control device for the pump equipment that can effectively avoid damage to the clutch mechanism while avoiding frequent start of the prime mover. There is a point to do.

In order to achieve the above-mentioned object, the first characteristic configuration of the pump equipment according to the present invention is, as described in claim 1 of the document of the claims, the pump installed in the pump well and the discharge side of the pump. A discharge valve, a prime mover for driving the pump, a clutch mechanism for connecting or disconnecting transmission of driving force from the prime mover to the pump, and a clutch control unit for controlling connection and disconnection of the clutch mechanism. In the pump equipment including, the clutch control unit, a power disconnection processing unit that disconnects the clutch mechanism after closing the discharge valve in a state where the drive of the prime mover is maintained, and a prime mover of the prime mover. A power connection processing unit that opens the discharge valve after connecting the clutch mechanism while maintaining driving, and a period until a predetermined delay time elapses after the clutch mechanism is disconnected by the power disconnection processing unit. And a delay processing unit that prohibits connection of the clutch mechanism by the power connection processing unit.

While the drive of the prime mover is maintained, the power cut processing unit first discharges and closes the valve, so that backflow of water to the pump well can be suppressed, and when the clutch mechanism is disengaged thereafter, a large torque generated by reverse rotation of the pump Can be prevented from acting on the prime mover. After that, the delay processing unit prohibits reconnection of the clutch mechanism by the power connection processing unit until a predetermined delay time elapses, so that, for example, the clutch mechanism may be reconnected during reverse rotation of the pump due to water falling. Absent. Therefore, it is not necessary to provide a rotation suppressing mechanism for suppressing the rotation of the pump between the fitting/removing means and the pump, and the pump can be started and stopped without stopping the prime mover.

The second characteristic configuration is, in addition to the first characteristic configuration described above, in addition to the first characteristic configuration described in claim 2, in that the delay time is due to a drop in water caused by the disengagement of the clutch mechanism by the power disengagement processing unit. It is a value that is set based on the resulting reverse rotation time of the pump.

If the delay time is set in consideration of at least the reverse rotation time of the pump caused by the water drop caused by the disconnection of the clutch mechanism, the clutch mechanism will be reconnected while the reverse torque due to the water drop is acting on the pump. There is no such thing.

The third characteristic configuration is, in addition to the first or second characteristic configuration described above, as described in claim 3, the delay time is set in accordance with connection of the clutch mechanism by the power connection processing unit. This is a value set based on the heat radiation time of the clutch plate whose temperature has risen.

If the delay time is set in consideration of at least the heat radiation time of the clutch plate whose temperature rises with the connection of the clutch mechanism, the clutch mechanism is reconnected in a state where the clutch whose temperature is raised by the connection is burned out by the reconnection control. There is no such thing.

The fourth characteristic configuration is, in addition to the third characteristic configuration described above, in addition to the third characteristic configuration, the delay time set based on the heat radiation time of the clutch plate is a time point at which the clutch mechanism is connected. Alternatively, the time is measured based on either of the disengagement points of the clutch mechanism.

When the delay time is set based on the heat dissipation time of the clutch plate described above, if the delay time is measured based on the connection time of the clutch mechanism, the longer the elapsed time from the connection time to the disconnection time is, Since it is known that the clutch mechanism will be cooled, the time between disconnection and reconnection can be reduced. Furthermore, if the delay time is a certain time or more, it may be possible to connect immediately even after disconnection. Further, when the delay time is measured with reference to the disconnection time point of the clutch mechanism, the connection is re-established after a uniform delay time for heat dissipation has elapsed from the disconnection time point, regardless of the elapsed time from the connection point of the clutch mechanism to the disconnection time point.

As described in claim 5, the fifth characteristic configuration is, in addition to the third or fourth characteristic configuration described above, executed by the power disengagement processing unit until the clutch mechanism is disengaged. When the number of times of connection of the clutch mechanism is less than a predetermined number of times set in advance, the connection of the clutch mechanism by the power connection processing unit is allowed regardless of the delay time set based on the heat radiation time of the clutch plate. There is a point to do.

If the number of times the clutch mechanism is connected until the clutch mechanism is disconnected is small, it is possible to immediately connect the clutch mechanism without causing an excessive temperature rise in the clutch mechanism. Reconnection is possible.

The sixth characteristic configuration is, in addition to the characteristic configuration of any one of the first to fifth aspects, as described in the sixth aspect, when the water level of the pump well reaches the pump activation water level, the prime mover is activated. Then, when the water level of the pump well reaches the pump stop water level in the drainage activation state by the drainage activation control unit that opens the discharge valve after connecting the clutch mechanism and the drainage activation control unit, the discharge valve is closed. After further disconnecting the clutch mechanism, a drainage stop control unit for stopping the prime mover, and further comprising a central control unit, the clutch control unit is operable in a drainage activation state by the drainage activation control unit, Even if the clutch control unit is in the operating state, the drainage stop control by the general control unit is prioritized.

After the prime mover is started by the drainage start control section of the integrated control section, and before the prime mover is stopped by the drainage stop control section, the clutch is connected or disconnected by the clutch control section so that the pump is in the drainage state or drainage. It becomes possible.

The seventh characteristic configuration is, in addition to the fourth characteristic configuration described above, as described in claim 7, the integrated control unit is installed in a control room separated from the pump well, and the clutch control unit is It is located near the pump well.

The pump equipment is centrally controlled by the integrated control unit installed in the control room separated from the pump well, and the clutch control unit installed near the pump well confirms the state of the pump well and drains the pump quickly and appropriately. Start or stop control is possible.

The first characteristic configuration of the method for operating pump equipment according to the present invention is, as described in claim 8, a pump installed in a pump well, a discharge valve provided on the discharge side of the pump, and the pump. A method of operating pump equipment, comprising: a prime mover for driving a motor, and a clutch mechanism for connecting or disconnecting transmission of a driving force from the prime mover to the pump, wherein the discharge is performed while the drive of the prime mover is maintained. And a power disconnection processing step of disconnecting the clutch mechanism after closing the valve, a power connection processing step of opening the discharge valve after connecting the clutch mechanism in a state where the driving of the prime mover is maintained, and the power disconnection processing. The clutch control step includes: a delay processing step of prohibiting the clutch mechanism from being connected by the power connection processing step until a predetermined delay time elapses after the clutch mechanism is disconnected in step. There is a point.

The second characteristic configuration is, in addition to the first characteristic configuration described above, in addition to the above-mentioned first characteristic configuration, when the water level of the pump well reaches a pump activation water level, the prime mover is activated to activate the clutch mechanism. When the water level of the pump well reaches the pump stop water level in the drainage start state by the drainage start control step of opening the discharge valve after connection and the drainage start control step, the clutch mechanism is disconnected after closing the discharge valve. Then, further comprising a general control step including a drainage stop control step of stopping the prime mover, the clutch control step is configured to be executable in a drainage startup state by the drainage startup control step, and the clutch control step operates. Even in the state, the drainage stop control in the drainage stop control step is prioritized.

A characteristic configuration of a control device for pump equipment according to the present invention is, as described in the same claim 10, that a pump installed in a pump well, a discharge valve provided on a discharge side of the pump, and the pump are driven. A control device for pump equipment, comprising a prime mover and a clutch mechanism for connecting or disconnecting transmission of driving force from the prime mover to the pump, wherein the discharge valve is operated while the drive of the prime mover is maintained. A power disconnection processing unit that disconnects the clutch mechanism after closing, a power connection processing unit that opens the discharge valve after connecting the clutch mechanism while maintaining driving of the prime mover, and the power disconnection processing unit with the power disconnection processing unit. A delay processing unit that prohibits connection of the clutch mechanism by the power connection processing unit until a predetermined delay time elapses after the clutch mechanism is disengaged.

As described above, according to the present invention, it is possible to provide pump equipment, a method for operating the pump equipment, and a control device for the pump equipment that can effectively avoid damage to the clutch mechanism while avoiding frequent start-up of the prime mover. Is now possible.

Explanatory drawing of a sewage treatment plant incorporating pump equipment according to the present invention The principal part top view of the pump equipment by this invention Side view of essential parts of pump equipment according to the present invention Explanatory drawing of a reduction mechanism equipped with a clutch mechanism Explanatory drawing of control device equipped with pump equipment Flow chart showing integrated control steps Flowchart showing clutch control steps The flowchart which shows another embodiment of a clutch control step. The flowchart which shows another embodiment of a clutch control step. Flowchart showing another embodiment of the clutch control step

Embodiments of the pump equipment, the method for operating the pump equipment, and the control device for the pump equipment according to the present invention will be described below.
FIG. 1 shows a sewage treatment plant 100 that purifies sewage that has flowed in from a combined sewer A. The sewage that has flowed into pump well C after the sand and gravel has been removed in sedimentation basin B is pumped in pump facility D and is first sent to sedimentation basin E, where impurities and the like are removed by sedimentation and then activated sludge is filled in the reaction. It is biologically treated in tank F. After that, it is guided to the final settling tank G, the supernatant is sterilized in the chlorine contact tank H, sent to the pressure regulating water tank I, and discharged to the river R.

The pump equipment D is provided with three systems of pump equipment D: a sewage pump equipment D1, an electric pump equipment D2 for rainwater, and a prime mover pump equipment D3 using fossil fuel.

A small amount of sewage flowing in from the sewer A at the time of fine weather is pumped up by the sewage pump equipment D1 driven by an electric motor, first purified through the sedimentation tank E, the reaction tank F, the chlorine contact tank H, etc., and then discharged to the river R. It

When the rainwater flowing from the sewer A merges with the sewage due to rainfall, the amount of wastewater increases, and when the water level of the pump well C rises, the electric pump system D2 is operated in addition to the normal pump facility D1, and when the water level further rises, the prime mover system The pump equipment D3 is operated.

The rainwater pumped up by the rainwater pump equipment D2, D3 is immediately sent to the pressure regulating water tank I and discharged to the river R.

The prime mover system pump equipment D3 uses a pump having a larger drainage capacity than the pumps provided in the sewage pump equipment D1 and the rainwater system pump equipment D2 in preparation for a large amount of rainfall. Therefore, when drainage is performed by the pump provided in the prime mover pump equipment D3, the water level in the pump well C suddenly drops, depending on the amount of inflowing water, and when stopped, the water level rises and it is necessary to restart the pump. Sexuality occurs. Therefore, it is necessary to intermittently operate the pump without stopping the prime mover.

As shown in FIGS. 2 and 3, the prime mover system pump equipment D3 includes a plurality of pump equipments 10. Each pump facility 10 connects or disconnects the pump P, the prime mover 6 that drives the pump P, the reduction mechanism 7 that transmits the driving force of the prime mover 6 to the pump P, and the transmission of the driving force via the reduction mechanism 7. The clutch mechanism 8 and a clutch control unit (not shown) that controls switching between connection and disconnection of the clutch mechanism 8 are provided.

The pump P includes a pump casing 2 in which an impeller is housed, a suction pipe 1 connected to the tip of the pump casing 2, and a pumping pipe 3, a discharge casing 4, and a discharge valve V at the rear end of the pump casing 2. A discharge pipe 5 is provided.

A main shaft that rotationally drives the impeller is arranged so as to project upward from the discharge casing 4, and is connected to the output rotation shaft in the vertical posture of the reduction mechanism 7 via a coupling, a connection shaft, and the like. The horizontal input rotary shaft of the speed reduction mechanism 7 is connected to the horizontal output rotary shaft of the prime mover 6 formed of a gas turbine via a coupling and a connecting shaft.

FIG. 4 shows a cross section of the speed reduction mechanism 7 including the clutch mechanism 8. The power transmitted to the input shaft 7A is transmitted to the first bevel gear 7B via the wet multi-plate clutch mechanism 8, and the horizontal shaft power is converted to the vertical shaft power by the second bevel gear 7C meshing with the first bevel gear 7B. At the same time, it is decelerated, transmitted to the output shaft 7D, and transmitted to the main shaft of the pump P connected to the output shaft 7D.

In the wet multi-plate clutch mechanism 8, a plurality of pressing plates 8A that rotate integrally with the input shaft 7A and a plurality of pressed plates 8B that rotate integrally with the first bevel gear 7B are alternately arranged in the oil chamber and are hydraulically driven. The piston 8C is configured to be switchable between a pressed state and an open state, that is, a clutch connected state and a clutch disconnected state.

FIG. 5 shows a functional block configuration of the control device 20 for one pump facility 10. The control device 20 includes an integrated control unit 20A provided in the central control room of the sewage treatment plant 100 and an end control unit 20B installed near the pump well C. The main control room is provided in the area separated from the pump well C in the building.

The integrated control unit 20A is constructed by a general-purpose computer or a high-performance microcomputer and a control program, and masters the prime mover 6, the clutch mechanism 8, the discharge valve V, etc. based on the water level of the water level gauge L provided in the pump well C. The control unit is configured to perform overall control.

The terminal control unit 20B includes a microcomputer connected to the general control unit 20A via a communication line T, a control program, and the like, and receives the power disconnection switch SW1 and the power connection switch SW2, and based on their input states. It is configured to function as a slave control unit capable of controlling the clutch mechanism 8 and the discharge valve V.

The integrated control unit 20A controls the start-up of the prime mover 6 when the water level of the pump well C reaches the pump start-up water level during rainfall, connects the clutch mechanism 8 after the start of the prime mover 6 is completed, and connects the clutch mechanism 8 and then discharges the valve. When the water level of the pump well C reaches the pump stop water level in the drainage activation state by the drainage activation control unit which is a functional block for opening V and the drainage activation control unit, the clutch mechanism 8 is disconnected after the discharge valve V is closed and then the valve V is closed. A drainage stop control unit that is a functional block that stops the prime mover 6 is provided. In an emergency, the clutch mechanism 8 can be disengaged while closing the discharge valve V, that is, the control can be simultaneously performed.

After the drainage start control unit is operated by the overall control unit 20A operated by the operator in the main control room, the terminal control unit 20B is in an operable state in the drainage start state until the drainage stop control unit is activated. The control program is incorporated so that the drainage stop control by the drainage stop controller is prohibited when the terminal control unit 20B is in the operating state.

The end control unit 20B functions as a clutch control unit according to the present invention, and the end control unit 20B discharges while maintaining the drive of the prime mover 6 and closes the valve V and then disengages the clutch mechanism 8. Until the predetermined delay time elapses after the clutch mechanism 8 is disengaged after the clutch mechanism 8 is connected while the drive of the prime mover 6 is maintained, and after the clutch mechanism 8 is disengaged by the power disengagement processor. And a delay processing unit that prohibits the connection of the clutch mechanism by the power connection processing unit.

The power disconnection processing unit and the power connection processing unit can start and stop the pump (start and stop of pumping) at an arbitrary timing without starting and stopping the prime mover 6.

The discharge valve V is closed by the power disconnection processing unit while the drive of the prime mover 6 is maintained. Since the discharge valve is closed, a sudden backflow to the pump well does not occur even if the pump stops draining. In the meantime, the clutch mechanism 8 is disengaged, and a large reverse torque generated by the reverse rotation of the impeller of the pump P acts on the prime mover even without the rotation suppressing mechanism for suppressing the reverse rotation of the main shaft. be able to.

Even if the discharge valve is closed, the water in the pump gradually falls into the pump well. This falling water causes the impeller of the pump P to reverse. At this time, since the clutch mechanism 8 is disengaged, the reverse rotation torque does not act on the prime mover.

After that, the delay processing unit prohibits the reconnection of the clutch mechanism 8 by the power connection processing unit until a predetermined delay time elapses. Therefore, the clutch mechanism 8 is not reconnected during the reverse rotation of the pump P remaining between the valve V and the pump well or the water falling in the pumping pipe during reverse rotation of the pump P. Therefore, it is not necessary to provide a rotation suppressing mechanism that suppresses rotation of the main shaft of the pump P in the reverse direction between the clutch mechanism 8 and the pump P. If reverse rotation torque is applied to the driving prime mover 6, it may cause a failure such as a stall of the prime mover. Therefore, it is necessary to prevent reverse rotation torque from being applied to the prime mover.

The delay time is preferably a value set on the basis of the reverse rotation time of the pump P caused by the water drop in the pumping pipe caused by the disengagement control of the clutch mechanism 8 by the power disengagement processing unit, and at least the disengagement of the clutch mechanism 8. When the delay time is set in consideration of the reverse rotation time of the pump caused by the water drop in the pumping pipe caused by the control, the clutch mechanism 8 is reconnected while the reverse torque due to the water drop acts on the pump P, for example. There is no such thing.

In addition, the delay time is preferably a value set based on the heat radiation time of the clutch plate that is increased by the connection control of the clutch mechanism 8 by the power connection processing unit, and at least with the connection control of the clutch mechanism 8. If the delay time is set in consideration of the heat radiation time of the raised clutch plate, the clutch mechanism will not be reconnected in a state where the heated clutch plate is burned out. By thus providing the delay time so as not to move to the next operation, it is possible to prevent damage to each device due to an operation error of the clutch mechanism or the prime mover.

The terminal control unit 20B may be fixedly installed near the pump well, or may be configured to be portable by an operator. In this case, a communication unit capable of wireless communication with the integrated control unit 20A may be provided to control the clutch mechanism and the discharge valve via the integrated control unit 20A. Furthermore, the terminal control unit 20B and the integrated control unit 20A may be integrated. In this case, it is advisable to install a TV camera, etc. that can better understand the condition of the pump well.

Hereinafter, the control operation of the overall control unit 20A and the end control unit (clutch control unit) 20B will be described based on FIGS. 6 and 7. 6(a) shows the case of the preceding standby operation, and FIG. 6(b) shows the normal operation.

As shown in FIG. 6A, in the case of the preceding standby operation, the operator of the central control room operates the integrated control unit 20A when it is predicted to rain (S1) and starts the gas turbine that is the prime mover. The pump is put in the standby operation state to prepare for a rapid increase in precipitation (S2). At this time, since the discharge valve is closed and the clutch mechanism is disengaged, the pump is not drained.

When the operator determines that the water level of the pump well has reached the pump starting water level, hydraulic oil is supplied to the piston of the clutch mechanism to connect and operate the clutch mechanism (S4), and the delay time until the clutch plate is completely connected. (S5), the discharge valve V is fully opened to shift to the drainage starting state (S6).

After that, when the water level fluctuates, the standby operation and drainage operation are repeated, and when the water level in the pump well drops to the pump stop water level and the air operation continues for a certain period of time with the clutch engaged, the discharge valve V is closed. (S8), the clutch mechanism is disconnected (S9). The prime mover then stops after a predetermined period of cooling operation (S10).

In the above description, an example in which the operator confirms and determines the pump starting water level has been described, but the pump starting water level may be automatically detected by a water level sensor to operate.

As shown in FIG. 6B, in the case of normal operation, the operator in the central control room activates the integrated control unit 20A when it is predicted that rainfall will occur. When the water level in the pump well reaches the pump starting water level due to rainfall (S11), the gas turbine that is the prime mover is started so that the pump can be driven (S12). At this time, the clutch mechanism is disengaged so that it is not drained from the pump.

After that, when the prime mover starts up, hydraulic oil is supplied to the piston of the clutch mechanism to connect and operate the clutch mechanism (S14), and after waiting a delay time until the clutch plate is completely connected (S15), the discharge is performed. Then, the valve V is fully opened to shift to the drainage starting state (S16).

When the water level in the pump well drops to the pump stop water level (S17), the discharge valve V is closed (S18) and the clutch mechanism is disengaged (S19). The prime mover then stops after a predetermined period of cooling operation (S20).

When shifting to the drainage activation state in step S6 or step S16, the state signal is transmitted to the terminal control unit 20B via the communication line T, and the terminal control unit 20B shifts to an operable state. Further, when the drainage stop control unit closes the discharge valve (S8), a signal is transmitted to the terminal control unit 20B via the communication line T, and the terminal control unit 20B shifts to an inoperable state.

As shown in FIG. 7, when the terminal control unit 20B shifts to the drainage activation state, it shifts to a state in which both the power disconnection switch SW1 and the power connection switch SW2 can be operated.

The operable state is a process of making the operator recognize that the operable state is possible. For example, the backlight provided to the power disconnection switch SW1 and the power connection switch SW2 is turned on or the red state indicating the inoperable state is operated. It is a process of switching to a green color indicating a possible state.

The inoperable state is a process of making the operator recognize that it is in an inoperable state. For example, the backlight of the power disconnection switch SW1 and the power connection switch SW2 is turned off, or the inoperable state changes from green to inoperable state. This is the process of switching to the red color indicating the state.

When the power cutoff switch SW1 is turned on by an operator who visually checks the water level of the pump well and determines that the water level is close to the pump stop water level (SA1), the terminal control unit 20B fully closes the discharge valve V ( SA2), the clutch mechanism is disengaged (SA3), a predetermined delay time timer is set, and the backlight of the power connection switch SW2 is turned off or switched to red (SA4). In this state, the operation of the power connection switch SW2 is prohibited.

The predetermined delay time timer is a first delay time timer that is set based on the reverse rotation time of the pump caused by the water drop that occurs when the clutch mechanism is disengaged, and the clutch plate that has increased in temperature due to the connection of the clutch mechanism. It is a second delay time timer that is set based on the heat radiation time. In the present embodiment, the second delay time timer is a timer that counts the time when the clutch mechanism is disengaged.

When the first delay time has elapsed (SA5) and the second delay time has further elapsed (SA6), the backlight of the power connection switch SW2 is turned on or switched to green to permit the operation of the power connection switch SW2 (SA7). ..

After that, when the operator visually confirms that the water level in the pump well has risen, the power connection switch SW2 is turned on (SA8), the clutch mechanism is connected (SA9), and the clutch is disengaged when the time required to connect the clutch plate has elapsed. When it is determined that the connection has been made surely (SA10), the discharge valve V is fully opened (SA11), and the process returns to step SA1.

The block for executing the control of steps SA1 to SA4 described above constitutes a power disconnection processing unit, the block for executing the control of steps SA5 to SA7 constitutes a delay processing unit, and the control of steps SA8 to SA11 is executed. The power connection processing unit is configured by the block.

That is, the method for operating the pump equipment according to the present invention can be applied to either the preceding standby operation or the normal operation, and the clutch mechanism is disconnected after the discharge valve is closed while the driving of the prime mover is maintained. Power disconnection processing step, a power connection processing step in which the clutch mechanism is connected and the discharge valve is opened while the drive of the prime mover is maintained, and a predetermined delay time after the clutch mechanism is disconnected in the power disconnection processing step. Until the time elapses, a clutch control step including a delay processing step of prohibiting connection of the clutch mechanism by the power connection processing step and a clutch control step are included and executed by the end control unit 20B.

In addition, when the water level of the pump well reaches the pump activation water level by the integrated control unit 20A, the prime mover is activated, and the drainage activation control step of opening the discharge valve after connecting the clutch mechanism and the drainage activation state by the drainage activation control step are performed. When the water level in the pump well reaches the water level at which the pump is stopped, the overall control step including the drainage stop control step of discharging, closing the valve, disconnecting the clutch mechanism, and then stopping the prime mover is executed. The clutch control step is configured to be executable in the activated state, and the drainage stop control by the drainage stop control step is prioritized even when the clutch control step is in the operating state. That is, the integrated control step is always prioritized over the clutch control step.

Even if the amount of water flowing into the pump well changes due to such operation, the engine is frequently started and stopped by controlling the clutch mechanism and the discharge valve without providing a rotation suppression mechanism that suppresses the rotation of the pump. Without doing so, it will be possible to stop the operation of the pump and properly control the water level in the pump well to respond to record heavy rainfall.

FIG. 8 shows a second control mode executed by the terminal control unit 20B.
Similar to the example of FIG. 7, when the terminal control unit 20B shifts to the drainage starting state, it shifts to a state in which both the power disconnection switch SW1 and the power connection switch SW2 can be operated.

When the power cutoff switch SW1 is turned on by the operator who visually checks the water level in the pump well and determines that the water level is close to the pump stop water level (SB1), the terminal control unit 20B fully closes the discharge valve V ( SB2), the clutch mechanism is disengaged (SB3), a predetermined delay time timer is set, and the backlight of the power connection switch SW2 is turned off or switched to red (SB4). In this state, the operation of the power connection switch SW2 is prohibited.

Similar to the example of FIG. 7, the predetermined delay time timer is used to connect the clutch mechanism with the first delay time timer that is set based on the reverse rotation time of the pump caused by the water drop caused by the disconnection of the clutch mechanism. It is a second delay time timer that is set based on the heat radiation time of the clutch plate whose temperature has risen accordingly.

When the first delay time has elapsed (SB5), it is determined whether or not the value of the clutch engagement number counter is larger than the predetermined value N (SB6), and if it is equal to or smaller than the predetermined value N (SB6, N), Without waiting for the elapse of the second delay time, the backlight of the power connection switch SW2 is turned on or switched to green to permit the operation of the power connection switch SW2 (SB8).

When the number of times the clutch mechanism is connected until the clutch mechanism is disconnected is small, the clutch mechanism does not rise in temperature so much. Therefore, it is not necessary to prohibit the connection of the clutch mechanism, and quick reconnection is possible without waiting for the elapse of the second delay time, that is, the heat radiation time that normally takes about 5 to 15 minutes. Therefore, the determination of the clutch mechanism connection permission based on the number of clutch connections is effective in improving the workability of the pump equipment.

If the value of the clutch connection number counter is larger than the predetermined value N (SB6, Y), wait for the second delay time to elapse (SB7), and then turn on the backlight of the power connection switch SW2 or switch to green to turn on the power. The operation of the connection switch SW2 is permitted (SB8).

The value of the clutch engagement number counter is a counter that is reset when the gas turbine that is the prime mover is started, and then is incremented by "1" every time the end mechanism 20B controls the engagement of the clutch mechanism. Therefore, after the start of the gas turbine, the value of the clutch connection number counter that is first determined in step SB6 is “0”, the value of the clutch connection number counter that is determined next in step SB6 is “1”, and further thereafter. The value of the clutch connection number counter determined in step SB6 is "2".

That is, when the number of times the clutch mechanism is engaged until the clutch mechanism is disengaged by the power disengagement processing unit is less than the preset number of times N, the delay time set based on the heat radiation time of the clutch plate. It is configured to allow connection of the clutch mechanism by the power connection processing unit regardless of the progress of.

The value of the predetermined value N is a value that is appropriately set based on the characteristics of the adopted clutch mechanism, and the value is not particularly limited. Incidentally, in the present embodiment, the predetermined value N is set to "1".

After that, when the operator visually confirms that the water level in the pump well has risen, the power connection switch SW2 is turned on (SB9), the clutch mechanism is connected and the value "1" is added to the clutch connection number counter (SB10). Then, when the time required to connect the clutch plates has elapsed, it is determined that the clutch is securely connected (SB11), the discharge valve V is fully opened (SB12), and the process returns to step SB1.

FIG. 9 shows a third control mode executed by the terminal control unit 20B.
In the present embodiment, the second delay time timer, which is set based on the heat radiation time of the clutch plate, is composed of a timer that counts the time when the clutch mechanism is connected.

Similarly to the example of FIGS. 7 and 8, when the terminal control unit 20B shifts to the drainage starting state, it shifts to a state in which both the power disconnection switch SW1 and the power connection switch SW2 can be operated.

When the power cutoff switch SW1 is turned on by the operator who has judged that the water level of the pump well is close to the pump stop water level (SC1), the terminal control unit 20B fully closes the discharge valve V ( SC2), the clutch mechanism is disengaged (SC3), the first delay time timer is set, and the backlight of the power connection switch SW2 is turned off or switched to red (SC4). In this state, the operation of the power connection switch SW2 is prohibited.

The first delay time timer is a delay time timer that is set on the basis of the reverse rotation time of the pump caused by the water drop that occurs when the clutch mechanism is disengaged.

When the first delay time has passed (SC5) and the second delay time has passed (SC6), the backlight of the power connection switch SW2 is turned on or switched to green to permit the operation of the power connection switch SW2 (SC7). ..

The second delay time timer is a timer that is set and timed when the clutch mechanism is connected, and initially set and timed at the clutch mechanism connection step of step S4 or step S14 of FIG.

After that, when the operator visually confirms that the water level in the pump well has risen, the power connection switch SW2 is turned on (SC8), the clutch mechanism is connected (SC9), and the second delay time timer is set and the timing is started. (SC10), when the time required to connect the clutch plates has elapsed, it is determined that the clutch is securely connected (SC11), the discharge valve V is fully opened (SC12), and the process returns to step SC1.

FIG. 10 shows a fourth control mode executed by the terminal control unit 20B.
In the present embodiment, when the number of times the clutch mechanism is engaged until the clutch mechanism is disengaged by the power disengagement processing unit is less than the preset number of times N, it is set based on the heat dissipation time of the clutch plate. The second delay time timer, which is configured to allow the connection of the clutch mechanism by the power connection processing unit regardless of the lapse of the delay time, is set based on the heat radiation time of the clutch plate. It is composed of a timer that counts as a reference.

Similar to the example of FIGS. 7 to 9, when the terminal control unit 20B shifts to the drainage starting state, it shifts to a state in which both the power disconnection switch SW1 and the power connection switch SW2 can be operated.

When the power cutoff switch SW1 is turned on by the operator who has judged that the water level is close to the pump stop water level by visually observing the water level of the pump well (SD1), the terminal control unit 20B fully closes the discharge valve V ( SD2), the clutch mechanism is disengaged (SD3), the first delay time timer is set, and the backlight of the power connection switch SW2 is turned off or switched to red (SD4). In this state, the operation of the power connection switch SW2 is prohibited.

When the first delay time has elapsed (SD5), it is determined whether or not the value of the clutch engagement number counter is larger than the predetermined value N (SD6), and if it is equal to or smaller than the predetermined value N (SD6, N), Without waiting for the elapse of the second delay time, the backlight of the power connection switch SW2 is turned on or switched to green to permit the operation of the power connection switch SW2 (SD8).

If the value of the clutch connection number counter is larger than the predetermined value N (SD6, Y), wait the elapse of the second delay time (SD7), and then turn on the backlight of the power connection switch SW2 or switch to green to turn on the power. The operation of the connection switch SW2 is permitted (SD8).

Similar to the example of FIG. 8, the value of the clutch engagement counter is reset when the gas turbine that is the prime mover is started, and is then incremented by "1" every time the end control unit 20B controls the engagement of the clutch mechanism. Is. Therefore, after the start of the gas turbine, the value of the clutch engagement number counter that is first determined in step SD6 is "0", the value of the clutch engagement number counter that is subsequently determined in step SD6 is "1", and further thereafter. The value of the clutch engagement number counter determined in step SD6 is "2". Also in this embodiment, the predetermined value N is set to "1".

After that, when the operator visually confirms that the water level in the pump well has risen, the power connection switch SW2 is turned on (SD9), the clutch mechanism is connected, and the value "1" is added to the clutch connection number counter (SD10). Further, after setting and starting the second delay time timer (SD11), when the time required for connecting the clutch plates has elapsed, it is judged that the clutch is securely connected (SD12), and the discharge valve V is fully opened ( SD13), and returns to step SD1.

In addition, when the second delay time timer is a timer that is clocked with reference to the time when the clutch mechanism is connected, the time for setting the timer value may be the time when the clutch mechanism is connected or operated. It may be the time when the time required for connection has elapsed.

In the present embodiment, the first delay time is set to 3 minutes to 5 minutes, but the first delay time is not limited to this value, and the first delay time is the suction pipe 1, the pump casing 2, and the pumped water. It may be appropriately set according to the sizes of the pipe 3, the discharge casing 4, and the like.

In the above-described embodiment, the present invention has been described with respect to the pump provided in the prime mover pump equipment D3, but the present invention is also applied to the pump provided in the sewage pump equipment D1 and the rainwater system pump equipment D2. It goes without saying that it is good.

In the above-described embodiment, the example in which the clutch mechanism employs the wet multi-plate clutch has been described, but any clutch mechanism capable of connecting or disconnecting power, such as a dry multi-plate clutch, may be used.

In the above-described embodiment, an example in which a gas turbine is used as a prime mover has been described, but the present invention can be applied to any type of prime mover such as an engine or an electric motor.

In the above-described embodiment, the pump is put into a standby operation at the operator's discretion, or an example in which drainage is stopped has been described. It may be done.

The above-described embodiment merely describes one example of the present invention, and the scope of the present invention is not limited by the description, and can be appropriately modified and designed within the range in which the effects of the present invention are exhibited. Needless to say.

1: Pump well 3: Pumping pipe 5: Discharge pipe 6: Motor 7: Reduction mechanism 8: Clutch mechanism 10: Pump equipment 20: Control device 20A: Control unit 20B: Clutch control unit P: Pump V: Discharge valve

Claims (10)

A pump installed in the pump well,
A discharge valve provided on the discharge side of the pump,
A prime mover for driving the pump;
A clutch mechanism for connecting or disconnecting transmission of driving force from the prime mover to the pump,
A clutch control unit that controls connection and disconnection of the clutch mechanism,
A pump facility having
In the clutch control unit,
A power disconnection processing unit that disconnects the clutch mechanism after closing the discharge valve in a state where the drive of the prime mover is maintained,
A power connection processing unit that opens the discharge valve after connecting the clutch mechanism while maintaining driving of the prime mover,
After the clutch mechanism is disengaged by the power disengagement processing unit, until a predetermined delay time elapses, a delay processing unit that prohibits connection of the clutch mechanism by the power connection processing unit,
Pump equipment equipped with. The pump facility according to claim 1, wherein the delay time is a value that is set based on a reverse rotation time of the pump that is caused by water falling due to the disconnection of the clutch mechanism by the power disengagement processing unit. The pump facility according to claim 1 or 2, wherein the delay time is a value set based on a heat radiation time of a clutch plate whose temperature has risen due to the connection of the clutch mechanism by the power connection processing unit. The pump facility according to claim 3, wherein the delay time set based on the heat radiation time of the clutch plate is measured with reference to either a connection time point of the clutch mechanism or a disconnection time point of the clutch mechanism. When the number of times the clutch mechanism is engaged until the clutch mechanism is disengaged by the power disengagement processing unit is less than a preset number of times, a delay set based on the heat radiation time of the clutch plate. The pump equipment according to claim 3 or 4, wherein connection of the clutch mechanism by the power connection processing unit is allowed regardless of the passage of time. When the water level of the pump well reaches the pump starting water level, the prime mover is started, and the discharge start control unit that opens the discharge valve after connecting the clutch mechanism,
A drainage stop control unit that disconnects the clutch mechanism after closing the discharge valve when the water level of the pump well reaches a pump stop water level in the drainage start state by the drainage start control unit, and then stops the prime mover,
Further comprises an integrated control unit including
The clutch control unit is configured to be operable in the drainage activation state by the drainage activation control unit, and the drainage stop control by the integrated control unit is prioritized even when the clutch control unit is in the operating state. The pump facility according to any one of claims 1 to 5. The pump facility according to claim 6, wherein the central control unit is installed in a control room separated from the pump well, and the clutch control unit is installed in a position near the pump well. A pump installed in the pump well,
A discharge valve provided on the discharge side of the pump,
A prime mover for driving the pump;
A clutch mechanism for connecting or disconnecting transmission of driving force from the prime mover to the pump,
A method of operating a pump facility comprising:
A power disconnection processing step of disconnecting the clutch mechanism after closing the discharge valve while maintaining driving of the prime mover;
A power connection processing step of opening the discharge valve after connecting the clutch mechanism while maintaining the drive of the prime mover,
After the clutch mechanism is disengaged in the power disengagement processing step, until a predetermined delay time elapses, a delay processing step of prohibiting connection of the clutch mechanism by the power connection processing step,
A method for operating a pump facility including a clutch control step including: When the water level of the pump well reaches the pump starting water level, the prime mover is started, and the discharge start control step of opening the discharge valve after connecting the clutch mechanism,
A drainage stop control step of disconnecting the clutch mechanism after closing the discharge valve when the water level of the pump well reaches the pump stop water level in the drainage start state by the drainage start control step, and then stopping the prime mover,
Further comprises an integrated control step including
The clutch control step is configured to be executable in the drainage start state by the drainage start control step, and the drainage stop control by the drainage stop control step is prioritized even when the clutch control step is in an operating state. The method for operating the pump equipment according to claim 8. A pump installed in the pump well,
A discharge valve provided on the discharge side of the pump,
A prime mover for driving the pump;
A clutch mechanism for connecting or disconnecting transmission of driving force from the prime mover to the pump,
A control device for a pump facility including:
A power disconnection processing unit that disconnects the clutch mechanism after closing the discharge valve in a state where the drive of the prime mover is maintained,
A power connection processing unit that opens the discharge valve after connecting the clutch mechanism while maintaining driving of the prime mover,
After the clutch mechanism is disengaged by the power disengagement processing unit, until a predetermined delay time elapses, a delay processing unit that prohibits connection of the clutch mechanism by the power connection processing unit,
Control device for pump equipment equipped with.

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