JP5475607B2 - Pump equipment and operation control device for pump equipment - Google Patents

Description

  The present invention relates to a pump facility provided in a drainage station or the like, and an operation control device for the pump facility.

This type of conventional pump equipment operates at a water level (LWL) or higher at which the pump does not suck vortices, and stops the pump below LWL. If the balance of the amount of water flowing into the pump water tank is poor (when it flows in with a small amount of water, etc.), it will start and stop repeatedly, causing difficulties in operation and operability, and the probability of failure (danger ) Was high .

  In order to solve the above problems, conventionally, a flow rate control function such as the number of revolutions has been added, or the amount of water discharged from the pump installed in the pumping station has been reduced to increase the number of units, and the inflow of water. The followability to the quantity was improved, and the start frequency (start / stop frequency) was reduced. Moreover, the countermeasure currently disclosed by the following patent documents 1 thru | or 5 may be taken.

Patent Document 1 discloses an invention related to a vertical shaft pump that controls the flow rate of a pump in accordance with the water level and enables drainage operation at a water level lower than the lowest water level level without generating harmful vortices. In this invention, the pump impeller is positioned below the position corresponding to the lowest water level at which the water level during the pump operation is below that at which the air is sucked from the suction bell mouth , and the pump casing below the impeller is placed in the pump casing. An intake hole is provided, and one end of the intake pipe is connected to the intake hole and the other end is opened to the atmosphere.

  Patent Document 2 discloses an invention relating to a prior standby operation method for a pump that performs only full power drain operation without performing air operation or air / water agitation operation. In this invention, the clutch 11 is mounted in the power transmission path between the output shaft 2 and the pump shaft 5 of the pump drive prime mover 1, and the operation of the prime mover is continued regardless of the suction water level or the discharge water level of the pump. When the discharge water level reaches a set value, the pump impeller 6 is rotated or stopped by turning the clutch 11 ON or OFF.

  In Patent Document 3, residual water in the pumping pipe is quickly discharged at the time of switching to the pumping-off operation, and vibration and noise are suppressed, and fuel consumption of the prime mover is reduced and energy consumption is suppressed. The invention which concerns on the standby operation method of the drainage pump which aimed at simplification of this is disclosed. In the present invention, the clutch 12 is interposed between the prime mover 14 and the main shaft 1, and the clutch 12 is maintained from the region where the water level exceeds the pumping start water level RWL to the pumping off water level SWL through the pumping start water level RWL. The regular drainage operation is performed in the ON state, and when the water level drops to the pumping cutoff water level SWL, the clutch 12 is turned off to stop the rotation of the main shaft 1 and the impeller 2 to shut off the pumping and remain in the pump. Water W is dropped into the water absorption well 10 in a short time.

Patent Document 4 discloses a drainage pump that quickly discharges residual water in a pumping pipe when switching to a pumping-off operation, suppresses vibration and noise, and reduces energy consumption by reducing fuel consumption of a prime mover. An invention relating to a standby operation method is disclosed. In the present invention, the clutch 12 is interposed between the prime mover 14 and the main shaft 1, from the area where the water level exceeds the pumping start level RWL, until the decrease in pumping cutoff level SWL through pumping start level RWL is a clutch 12 The full-speed drainage operation is performed in the ON state, and when the water level drops to the pumping cutoff water level SWL, the clutch 12 is turned OFF to stop the rotation of the main shaft 1 and the impeller 2 to shut off the pumping water and the remaining water in the pump After letting W fall into the water absorption well 10 in a short time, the clutch 12 is turned on again to perform full-speed standby operation.

  Patent Document 5 discloses an invention relating to an operation method of a vertical shaft pump that reduces the burden on an operator, reduces equipment costs and installation costs, prevents abnormal vibration and hunting operation, and the like. In the present invention, when the water level in the water tank 5 reaches the starting water level SWL, the prime mover 2 is started, the fluid coupling 4 is shut off, and the brake 15 is applied to maintain the rotational speed of the impeller 6 to be 0%. However, in preparation for the start of pumping, when the water level of the water tank reaches the pumping start water level TWL, the impeller 6 is rotated with the fluid coupling 4 in the transmission state until the rotational speed corresponds to 0% of the actual pumped water amount. When the speed is increased and the water level of the aquarium further rises to reach the lowest operable water level LWL, the rotational speed of the impeller is between 100% and the rotational speed corresponding to the actual pumped water amount 0% according to the water level change rate of the aquarium. The actual pumping operation is performed by changing the amount of water discharged from the pump body 1 to adjust the amount of drainage.

JP-A-2-78791 JP 7-77191 A JP-A-9-264287 Japanese Patent Laid-Open No. 10-18989 Japanese Patent Laid-Open No. 2000-27788

  However, since the invention disclosed in Patent Document 1 is an operation involving a gas-water mixing operation, there is a problem in that a large vibration is generated and the strength of the pump body, the civil engineering enclosure, etc. needs to be increased. In addition, in order to prevent the impeller and the casing from transiently contacting and seizing during idling, it is necessary to consider such that the gap between the casing and the impeller is larger than usual, and there is a problem that the pump efficiency is lowered.

In addition, in the inventions disclosed in Patent Documents 2, 3, and 4, when the engagement / disengagement of the clutch is used for the preliminary standby operation, the number of times the clutch is engaged / disengaged is increased although the number of times the drive unit is started is decreased. Lifetime and maintenance management of this is an issue. In addition, the clutch plate, which is a consumable part of the clutch, is difficult to see from the outside , and the frictional state is a part that must be disassembled and checked. In these patent documents, this problem is not mentioned, and the operability is improved, but the problem remains in terms of reliability.

  Further, in the invention disclosed in Patent Document 5, similar to Patent Documents 2 to 4, problems remain in maintaining and ensuring the reliability of the clutch (= fluid joint). Further, since the rotational speed control function by the fluid coupling is added, it is necessary to use a variable speed fluid coupling having an expensive and complicated structure for the fluid coupling, and there is a problem in economical efficiency.

  The present invention has been made in view of the above points, and has a simple facility configuration, and can reliably start and continue the operation of the pump without stopping the prime mover even for large fluctuations in water absorption level. An object of the present invention is to provide a pump facility and an operation control device for the pump facility.

In order to solve the above-described problems, the present invention provides a fitting / detaching means for coupling a pump, a speed reducer, a prime mover, a prime mover rotary shaft, and an input shaft of the reducer directly or indirectly so as to be fitted or detachable. And a connecting means for connecting the output shaft of the speed reducer and the pump rotating shaft , and the fitting / removing means is configured such that the fitting time can be arbitrarily adjusted, and is fitted / removed at a water absorption level below the impeller of the pump. Start the prime mover with the means detached, and when the water absorption level rises and reaches the pump operation start water level above the pump impeller , the prime mover rotates with the fitting time adjusted to 3 seconds or more by the fitting / removing means The pump equipment is characterized in that a control means for starting the operation of the pump by fitting the shaft and the input shaft of the reduction gear is provided.

Further, in the above pump equipment, characterized in that the wet clutch be selected the disengaging means fitting a hydraulic clutch or Takashihai oil-fluid coupling for a fixed rate.

Further, the present invention is characterized in that, in the pump facility, a rotation suppression mechanism for preventing reverse rotation of the pump is provided between the fitting / removing means and the pump.

The present invention also includes a pump, a speed reducer, a prime mover, an engagement / disengagement means for coupling the prime mover rotary shaft and the input shaft of the speed reducer directly or indirectly, and an output of the speed reducer. A connecting means for connecting the shaft and the pump rotating shaft , and the fitting / removing means is an operation control device for pump equipment configured to be able to arbitrarily adjust the fitting time, and is at a water absorption level below the impeller of the pump. When the prime mover is started with the fitting / removing means detached, and the water absorption level rises and reaches the pump operation starting water level above the pump impeller, the fitting time adjusted to 3 seconds or more by the fitting / removing means. The operation control device of the pump equipment is characterized in that the driving shaft is started by fitting the rotation shaft of the prime mover and the input shaft of the speed reducer .

Further, the present invention is the operation control device of the pump equipment, characterized in that the wet clutch be selected the disengaging means fitting a hydraulic clutch or Takashihai oil-fluid coupling for fixing speed.

  Further, according to the present invention, in the operation control device for a pump facility, when the integration number of fittings of the fitting / removing means is a predetermined number or more, or the product of the integration number of times and the fitting time is a predetermined number. It is characterized by providing a reporting means for reporting when the time is exceeded.

  Further, the present invention provides the operation control device for the pump equipment described above, wherein a rotation speed detector that detects the rotation speed of the speed reducer provided between the pump or the fitting / removing means and the fitting / removing means is rotated from the start of fitting. A time meter is provided to measure the actual mating time until the number detector detects the rated speed of the pump or speed reducer, and this occurs when the actual mating time measured by the hour meter exceeds the specified time. It is characterized by providing a reporting means for reporting.

  Further, according to the present invention, in the operation control device for a pump facility, the fitting means is a hydraulic clutch, and a hydraulic pressure detection means for detecting the hydraulic pressure of the hydraulic clutch is provided, and the hydraulic pressure value of the fitting state detected by the hydraulic pressure detection means is predetermined. It is characterized in that a reporting means is provided for reporting when the hydraulic pressure value becomes.

According to the present invention, at the water absorption level below the impeller of the pump, the operation of the prime mover is started with the fitting / removing means detached, and the water absorption level rises to the pump operation start water level above the pump impeller. When it has been reached, the control means for starting the operation of the pump by fitting the fitting / removing means with the arbitrarily adjusted fitting time is provided, and the following effects can be expected.
(A) By rotating the prime mover regardless of the water absorption level, it is possible to reduce the number of start times of the prime mover, which is a cause of failure, and to provide highly reliable pump equipment.
(B) It is possible to obtain the same effect as that of a conventional preceding standby pump without reducing the pump efficiency by widening the gap between the pump impeller and the pump casing.
(C) The water level control when there are a plurality of pumps, which is a problem of the conventional preceding standby pump, can be easily realized by the fitting / removing timing of the fitting / removing means.
(D) A reliable and economical pump that can prevent damage and deterioration of the shaft by using a fitting / removing means that can adjust the fitting time arbitrarily, and that does not require special design considerations. It can be equipment.
(E) In the case of flood control such as river drainage, when the river on the discharge side becomes a dangerous high water level (HWL), the main engine can be It is possible to wait for the water to drop until it reaches a drainable water level.

  Further, according to the present invention, the fitting / removal means is a wet clutch selected from a hydraulic clutch or a charge / discharge oil type fluid coupling for fixed speed, and the fitting time is 3 seconds or more. By adjusting the time, rapid water level fluctuations in the inflow and outflow waterways of rivers can be suppressed, and safety near the river can be secured.

  In addition, according to the present invention, a plurality of pumps are provided, and two or more pumps have substantially the same shape, and the pump operation start water levels of the plurality of pumps are set differently. In addition, the setting and change of the subsequent engine can be performed only by setting the operation control water level, the operation time can be smoothed, and highly reliable equipment can be realized.

  In addition, according to the present invention, since the rotation suppressing mechanism for suppressing the rotation of the pump is provided between the fitting / removing means and the pump, the pump can be reversed when water flows backward in the pump pipe while the fitting / removing means is being detached. By suppressing, it is possible to prevent the motor torque of the prime mover and the reverse torque due to the reverse flow from acting on the shaft system by fitting / removing means during the reverse rotation of the pump. Damage and deterioration can be prevented, and highly reliable pump equipment can be realized.

  Further, according to the present invention, the backflow prevention valve is provided at the discharge port of the discharge pipe of the pump, and the other end of the discharge pipe upstream of the backflow prevention valve is opened to the atmosphere above the planned maximum water level of the discharge water surface. Since one end of the intake pipe is connected, a reliable and stable clutch engagement / disengagement control can be constructed by eliminating the negative pressure on the primary side of the backflow prevention valve and reliably dropping the internal water.

  Further, according to the present invention, when the number of times of fitting of the fitting / removing means becomes a predetermined number or more, or when the product of the number of times of fitting and the fitting time becomes a predetermined time or more. Since the reporting means for reporting is provided, it is possible to realize an economical pumping facility with good maintainability and capable of grasping an appropriate replacement time without disassembling the fitting / removing means.

Further, according to the present invention, the rotational speed detector that detects the rotational speed of the speed reducer provided between the pump or the fitting / removing means and the pump, and the rotational speed detector from the start of the fitting of the fitting / detaching means, A time meter is provided to measure the actual mating time until the rated number of rotations of the machine is detected, and a reporting means is provided to report when the actual mating time measured with the hour meter exceeds the specified time. Therefore, it is possible to grasp an appropriate replacement time without disassembling the fitting / removing means, and it is possible to realize an economical facility with good maintainability.

  Further, according to the present invention, when the fitting means is a hydraulic clutch, and a hydraulic pressure detection means for detecting the hydraulic pressure of the hydraulic clutch is provided, and the hydraulic pressure value in the fitted state detected by the hydraulic pressure detection means becomes a predetermined hydraulic pressure value Since the reporting means for reporting is provided, it is possible to grasp an appropriate replacement time with a simple configuration without disassembling the fitting means.

It is a figure which shows the structural example of the pump installation provided with the vertical shaft pump which concerns on this invention. It is a figure which shows the structural example of the pump installation provided with multiple vertical shaft pumps which concern on this invention. It is a figure which shows a part of other structural example of the vertical pump of the pump installation provided with the vertical pump which concerns on this invention. It is a figure which shows the replacement | exchange recommendation processing flow of the clutch plate of the clutch of the pump installation which concerns on this invention. It is a figure which shows the rotation speed of a pump or a reduction gear, and the design fitting time of a clutch. It is a figure which shows the structural example of the pump installation provided with several conventional vertical shaft pumps. It is a figure which shows the other structural example of the pump installation provided with several conventional vertical shaft pumps.

  Hereinafter, embodiments of the present invention will be described in detail. FIG. 1 is a diagram showing a configuration example of a pump facility according to the present invention. As shown in the figure, the pump facility includes a vertical shaft pump P. The vertical shaft pump P has a suspension pipe 10 disposed in the suction water tank 1 via a pump base 13 on the pump installation floor 2 at the upper part of the suction water tank 1, and a bent discharge connected to the upper part of the suspension pipe 10. A pipe 11 and a discharge pipe 12 connected to the bent discharge pipe 11 are provided. A pump casing 14 is connected to the lower end of the suspension pipe 10, and a suction bell mouth 15 is connected to the lower end of the pump casing 14.

  Reference numeral 16 denotes a main shaft disposed in the central portion of the suspension pipe 10 and the pump casing 14 through the bent discharge pipe 11, and the main shaft 16 is provided in the pump casing 14 with an underwater bearing (water lubricated bearing) 18-1. , 18-2 are rotatably supported. A pump impeller (pump impeller) 17 is attached to the lower end of the main shaft 16. The upper portion of the main shaft 16 penetrates the bent discharge pipe 11 and is supported by the outer bearing 20, and the upper end is connected to the output shaft 21 b of the speed reducer 21. An input shaft (not shown) of the speed reducer 21 is connected via a clutch 23 to a rotating shaft 24a of a prime mover 24 including an electric motor, a diesel engine, a gas turbine, and the like. 26 is a discharge valve provided in the discharge pipe 12, and 27 is a backflow prevention valve provided in the discharge port of the discharge pipe 12. Reference numeral 19 denotes a guide vane, and the guide vane 19, the pump casing 14, and the pump impeller 17 constitute a pump unit.

  In the pump equipment configured as described above, when the prime mover 24 is started and the rotational force of the rotary shaft 24a is transmitted to the main shaft 16 via the clutch 23 and the speed reducer 21, the pump impeller 17 rotates and sucks from the lower end opening of the suction bell mouth 15 The discharged water is discharged to the discharge water tank 3 through the pump casing 14, the suspension pipe 10, the bent discharge pipe 11, and the discharge pipe 12. Reference numeral 30 denotes a control unit for controlling the pump equipment. The control unit 30 includes a control value S1 such as a water level and an arbitrary setting, a water level signal S2 of the suction water tank 1 and the discharge water tank 3 detected by the water level sensor, and a speed reducer 21. The rotation speed detection signal S3 from the rotation speed detection unit 21a is input, and an engagement / disengagement command S4 is output from the control unit 30 to the clutch 23. In addition, a clutch (fitting / disengaging means) 23 that freely connects and disengages the rotation shaft of the prime mover 24 and the input shaft 23a of the speed reducer 21 is configured so that the fitting time (time required for clutch connection) can be arbitrarily adjusted. Has been.

  In the pump equipment configured as described above, the coupling between the rotary shaft 24a of the prime mover 24 and the input shaft 23a of the clutch 23 is released (detached) with the water level in the suction water tank 1 positioned below the pump impeller 17. ), The operation of the prime mover 24 is started manually or automatically. When the water absorption level in the suction water tank 1 rises and reaches the pump operation start water level LWL above the pump impeller 17, the control unit 30 outputs an engagement / disengagement command S4 to the clutch 23, and the clutch is arbitrarily adjusted. The vertical shaft pump P is started to operate (rotation of the pump impeller 17) after fitting in time.

  By rotating the prime mover 24 regardless of the water absorption level in the suction water tank 1 as described above, the number of start times of the prime mover 24 having a high probability of failure can be reduced, and a highly reliable pump facility can be obtained. it can. Further, in the conventional stand-by type pump that performs the idling operation and the air-water mixing operation of the pump, the pump casing 14 and the pump impeller 17 are prevented from being seized by transient contact between the pump casing 14 and the pump impeller 17. However, since the pump equipment does not perform the idling and air / water mixing operation of the pump as described above, the gap between the pump casing and the pump impeller is increased. There is no need to perform this, and it is possible to obtain the effect of waiting in advance without reducing pump efficiency.

  When the clutch is engaged quickly in a short time as in the prior art, the pump discharges an excessive amount of water in a transient manner and causes large fluctuations in the suction water tank 1 and the discharge water tank 3. Hunting may occur. In addition, in the case of pumping equipment for flood control purposes, the discharge side is a general river, and sudden water level fluctuations reduce the safety of rivers, for example, by causing dangers such as capsizing ships that navigate the river. I will let you. On the other hand, as described above, by using the clutch 23 configured to be able to arbitrarily adjust the fitting time, it is possible to suppress rapid water level fluctuation of the river and to secure the safety in the vicinity of the river.

  Further, when the clutch is suddenly engaged as in the prior art, shock load is applied to the main shaft 16 of the pump, the shaft of the speed reducer 21 and the gear, and there is a concern about fatigue failure due to repeated engagement and disengagement of the clutch 23. However, by using the clutch 23 configured to be able to arbitrarily adjust the fitting time, the shaft can be prevented from being damaged or deteriorated. In addition, it is possible to provide a reliable and economical pump facility that does not require special design considerations. In addition, when the clutch 23 is suddenly engaged, there is a risk that the motor 24 of the internal combustion engine may cause a stalling phenomenon and may be broken or stopped. By loosely engaging the clutch 23, this stall phenomenon can be prevented, and a highly reliable pump facility can be realized.

  In addition, in the case of flood control such as river drainage, when the river on the discharge side becomes dangerously high water level (HWL), the operation of the pump for branch river drainage may be stopped in order to prevent the main river bank breakage. is there. In the conventional stand-by standby pump, it is necessary to stop the prime mover, but the water of the main river can be drained without stopping the prime mover by disengaging the clutch 23 that can be fitted and detached as described above. It is possible to wait for the water level to drop until the water level reaches a sufficient level, and when the water level becomes drainable, the clutch 23 configured so that the fitting time can be arbitrarily adjusted as described above is loosely engaged. , Safe drainage can be performed while suppressing rapid water level fluctuations in rivers.

  As the clutch 23 that can arbitrarily adjust the fitting time, it is preferable to use a wet clutch selected from a hydraulic clutch or a charge / discharge oil type fluid coupling for fixed speed. By starting and stopping the pump by engaging and disengaging the clutch 23 (fitting and disengaging), there is a problem in maintenance management that clutch engagement / disengagement increases, wear of the clutch plate is accelerated, and replacement time is accelerated. By using a wet clutch and using oil as a working medium, it is possible to lubricate the clutch plate surface, suppress wear of the clutch plate, and improve maintenance by improving life. In addition, pumps with good economic efficiency and maintainability are used because simple wet clutches selected from hydraulic clutches or charge / discharge oil type fluid couplings for fixed speeds are used instead of expensive and complex variable-speed fluid couplings. It can be equipment.

  In the case of a hydraulic clutch, the fitting time adjustment mechanism is provided with an adjustment valve for adjusting the oil pressure in the oil guide line to the clutch plate, and the fitting time is adjusted by adjusting the oil pressure with an adjusting screw or the like. In addition, in the case of a charge / discharge oil type fluid coupling, an adjustment valve for adjusting the oil pressure is provided in the oil guide line between the impeller and the runner, the oil pressure is adjusted with an adjustment screw or the like, and the fitting time is adjusted. Alternatively, the fitting time is adjusted by adjusting the opening / closing time of a charge / discharge oil switching valve (electrically operated valve) provided in the oil guide line for fitting the clutch.

  About the slow fitting time of the clutch 23, although it changes with specifications of a pump, it is preferable to set it as 3 seconds or more. The most preferable fitting time is about 5 seconds. In order to further improve the loose fitting effect, the motor may be fitted at a lower rotational speed than the rated rotational speed during fitting. Further, a rotational speed control function may be added to the prime mover to improve the loose fitting effect, and a flow control function after fitting may be provided together to improve operability (operability).

  When a plurality of pumps are used in the conventional advance standby system, the pumps are always operated without starting / stopping. Therefore, as shown in FIG. 6, the pump length (position of the pump impeller) is the same. When the water level is higher than a certain water level WL5, all the pumps are discharged at once, and when the water level is lower than WL4, the discharge amount is reduced all at once, and the water level hunting of the suction water tank 1 and the discharge water tank 3 is generated and stabilized. It interferes with water operation. As a countermeasure, as shown in FIG. 7, a technique for changing the length of the pump (position of the pump impeller) has been proposed. In the case of the pump P3 having a short pump length and corresponding to a high water level, the probability of rain Since the actual load operation can be performed only during heavy rain with a low level and the actual load in the management operation is difficult, there is a problem in smoothing the operation time of the pump.

As shown in FIG. 2, in the case of a pump facility provided with a plurality of pumps of the above embodiment , a plurality of vertical pumps P1, P2, P3 are arranged in the suction water tank 1, and the plurality of vertical pumps are arranged. Two or more units have substantially the same configuration as the vertical shaft pump P shown in FIG. 1, and the operation start water levels of the plurality of vertical shaft pumps are set to different water levels. FIG. 2 shows a case where three vertical pumps P of the same type having the same pump length (position of the pump impeller 17) are arranged, and the operation start water levels of the vertical pumps P1, P2, and P3 are shown as control units of the vertical pumps. Are set to WL1, WL2, and WL3, respectively, in order of the low water level. In the state where the water level in the suction water tank 1 is located below the pump impeller 17, the operation of the prime mover of the full shaft pump is started in a state where the connection by the clutch is released (detached). When the water absorption level in the suction water tank 1 rises and reaches the pump operation start water level WL1 above the pump impeller 17 of the vertical pump P1, the clutch is fitted with an arbitrarily adjusted fitting time to operate the vertical pump P1 (pump The rotation of the impeller 17 is started. When the water level further rises and reaches WL2, the operation of the vertical pump P2 is similarly started, and when the water level reaches WL3, the operation of the vertical pump P3 is started.

If this is the case, the vertical pump P1 has a lower operation start water level than the other pumps P, so that the operation time becomes longer, and the failure occurs earlier particularly in the connection part such as the clutch, and the life is also shortened. While using the pump of the same type and shape as described above, the operation start water level at the control unit of each vertical pump, while changing the setting of the water level sensor to the setting of the water level sensor used by other pumps, By setting the water level sensor of each pump differently, setting the first operating unit (P1 in FIG. 2) that operates as a preceding standby pump and increases the operation time, and the subsequent generators (pumps P2 and P3) that require less operation time -The change can be made only by changing the setting of the operation control water level of the water level sensor at the control unit of each pump that engages and disengages the clutch. As a result, the operation time can be smoothed for all the pumps without concentrating the operation time only on the specific pump, and the wear of the connection portion such as the clutch can be made uniform.

  In the present embodiment, as shown in FIG. 1, a control unit 30 is provided, and the control unit 30 has a control value S1 such as a water level and arbitrary settings, a water level signal S2 of the suction water tank 1 and the discharge water tank 3, and a rotation speed detection unit 21a. Is input with a rotational speed detection signal S3, and an engagement / disengagement command S4 is output from the control unit 30 to the clutch 23. In the conventional standby standby pump, power for stirring water is required even during standby operation. Here, a standby command (detachment command of the engagement / disengagement command S4) is output from the control unit 30 to the clutch 23. After that, the water agitation power is not required, and only the no-load power of the prime mover 24 is obtained, and the energy-saving standby operation of the pump becomes possible.

  In the existing pump equipment, in order to add the advanced standby function, in the full-speed full-water level standby operation method, as a countermeasure against vibration during standby operation, measures such as full renewal of the pump must be taken to increase rigidity. The standby operation function could not be provided. Here, by adding a simple control function to the clutch 23 and the control unit 30 that can adjust the fitting time, a standby operation function can be added, and application to existing pump equipment is easy. In addition, since there is no vibration or the like, it is not necessary to reinforce the existing civil engineering frame.

FIG. 3 is a diagram showing a part of another configuration example of the pump facility according to the present invention. 3, the same reference numerals as those in FIG. 1 denote the same or corresponding parts. In Hontate shaft pump as shown is provided with a rotation suppression mechanism (a brake) 31 to suppress the rotation of the pump (between the reducer 21 and the main shaft 16 in this case) between the clutch 23 and the pump of the main shaft 16.

  In the vertical shaft pump having the above structure, the clutch 23 is disengaged (detached), and the pump pipe (the suction bell mouth 15, the pump casing 14, the suspension pipe 10, the bent discharge pipe 11, and the discharge pipe 12) is watered. When the engine flows backward, the pump impeller 17 may reverse. When the clutch 23 is engaged during the reverse rotation, the motor torque of the prime mover 24 and the reverse rotation torque due to the reverse flow are applied to the shaft system such as the main shaft 16 by the clutch 23, so that a load applied to the shaft system is increased. By providing the rotation suppression mechanism 31 as described above, it is possible to prevent reverse rotation, so that the burden on the shaft system can be reduced and damage and deterioration of the shaft system can be prevented, so that highly reliable pump equipment can be realized.

  In addition, during the standby operation of the pump (= during idle operation), the rotation of the prime mover 24 cannot be cut by 100% with the hydraulic clutch, and rotation (forward rotation) occurs. When the main shaft 16 rotates in an anhydrous state, the water-lubricated bearings 18-1 and 18-2 (see FIG. 1) may burn out. In addition to the preceding standby operation, when the clutch 23 is disengaged and the management operation is performed with the prime mover 24 alone, the rotation occurs. By providing the rotation suppression mechanism 31 between the clutch 23 and the main shaft 16 of the pump as described above, this rotation can be prevented, so there is no danger of the main shaft 16 rotating in an anhydrous state, and other than emergency such as during rain The outflow of water to the discharge river can also be prevented.

  Further, in the vertical shaft pump P, as shown in FIG. 3, a backflow prevention valve 27 is provided at the discharge port of the discharge pipe 12, and the other end of the discharge pipe 12 upstream of the backflow prevention valve 27 is discharged from the discharge water tank 3. One end of an air intake pipe 32 that is open to the atmosphere above the planned maximum water level (HWL) of the water surface is connected. In the vertical shaft pump having the above structure, when a negative pressure portion is formed on the primary side of the backflow prevention valve when the clutch 23 is disengaged, the clutch 23 is re-engaged and the pump starts operation. There is a possibility that the pressure rises due to the impact phenomenon, and in the worst case, there is a possibility that the pipe is damaged. By providing the air intake pipe 32 as described above, the negative pressure on the primary side of the check valve 27 is eliminated, and the internal water (the discharge pipe 12, the bent discharge pipe 11, the suspension pipe 10, and the pump casing is surely obtained). 14 water) is dropped (returned to the suction water tank 1), so that a reliable and stable clutch engagement / disengagement control can be established.

  The air intake pipe 32 rises up to the planned maximum water level (HWL) on the discharge side so that the discharged water does not flow backward from the air intake pipe 32 when the pump is stopped. The diameter of the air intake pipe 32 is preferably about 5 to 20% of the pump diameter (most preferably around 10%) although it depends on the scale of the pump equipment.

  The discharge valve 26 provided in the middle of the discharge pipe 12 is used in a fully open state or a temporary intermediate open state after the starting of the prime mover 24 is started. By using the clutch 23 in an open state (for example, 60% opening degree) only when the clutch 23 is disengaged and when engaged (when engaged), more effective discharge of transient water during engagement is achieved. It becomes possible to suppress. After the engagement of the clutch 23 is completed, the flow rate is controlled by the opening degree of the discharge valve 26, so that the operability can be improved and the number of engagement / disengagement of the clutch 23 can be reduced, and the deterioration of the clutch 23 is prevented. Also contribute.

  In the present embodiment, the vertical axis mixed flow pump has been described. However, the present invention may be used for a horizontal axis pump, and is applicable even when the pump type is different (such as a spiral pump).

  By the way, when the number of engagements of the clutch 23 increases, the determination of the consumption / replacement of the clutch plate of the clutch 23 becomes a major problem in maintenance. Conventionally, the state of wear of the clutch plate is inspected by disassembling the clutch mechanism, but it is a very precise operation, and there is a problem that it cannot be performed by an operator of a general pump facility.

  Therefore, in another embodiment of the present invention, a recording unit (not shown) for recording the number of integrations of the engagement command of the clutch 23 is provided in the control unit 30, for example, and the engagement time and any set value are set. The recommended replacement fitting frequency and the recommended replacement integrated integration time, which is an arbitrary setting value, are stored in advance in a storage unit (not shown), and the integrated engagement frequency recorded by the recording unit is equal to or greater than the recommended replacement engagement frequency. Or when the product of the cumulative number of fitting times and the fitting time is equal to or greater than the recommended replacement fitting integration time, the controller 30 warns of an abnormality of the clutch 23 (recommendation of clutch plate replacement).

  FIG. 4 is a diagram showing a process flow of the clutch abnormality alarm. First, if there is a clutch engagement (command) in step ST1, the number of start-ups is counted up in step ST2 to calculate the cumulative number n of engagements. In step ST3, it is determined whether or not the cumulative fitting number n is equal to or greater than the recommended replacement number N (n ≧ N). If no (N), the process returns to step ST1. In step ST4, it is determined whether or not the product n × t of the cumulative fitting number n and the fitting time is not less than the recommended replacement fitting integration time Z (n × t ≧ Z), and if no (N), Returning to the step ST1. If either step ST3 or ST4 is YES (Y), the process proceeds to step ST5, where an alarm (recommendation of clutch plate replacement) is issued. The cumulative number of fittings is not the number of fitting commands, but the fitting detected by the fitting detection means such as detecting that the rotational speed of the pump or the speed reducer detected by the rotation detector 21a has reached the rated rotational speed. The total number of times may be integrated. In addition, although it is preferable to use the value which measured the fitting time of the actual machine for the said fitting time t, in order to set it as a simpler equipment structure, you may use a design value.

  When the cumulative number of mating times recorded in the recording section is equal to or greater than the recommended replacement mating number as described above, or the product of the cumulative mating frequency and the mating time is equal to or greater than the recommended mating time for replacement In addition, by alarming the abnormality of the clutch 23 from the control unit 30, it is possible to realize an economical pump facility with good maintainability and capable of grasping an appropriate replacement time without disassembling the clutch 23.

  As shown in FIG. 1, the controller 30 receives the rotation speed detection signal S <b> 3 detected by the rotation detector 21 a of the speed reducer 21 and outputs an engagement / disengagement command S <b> 4 to the clutch 23. Therefore, the control unit 30 can know the rotation speed of the pump or the speed reducer 21 and the time when the clutch engagement command is generated. Therefore, in another embodiment of the present invention, a time meter that measures the actual engagement time from the start of engagement of the clutch 23 to the control unit 30 until the rotation detection unit 21a detects the rated rotational speed of the pump or reducer ( (Not shown) and a storage unit (preliminary replacement time (α × t), which is a product of the design value (design fitting time t) of the clutch 23 and an arbitrary design constant) When the actual fitting time (measured fitting time t ′) measured by a time meter is equal to or longer than the recommended replacement time (α × t), the clutch plate replacement is notified.

FIG. 5 is a diagram showing the rotational speed N of the pump or the speed reducer and the design fitting time of the clutch. When the actual engagement time of the clutch is t ′ and the design engagement time t, the actual engagement time t ′ is t ′ ≧ α × t
In such a case, it is time to replace the clutch plate of the clutch. Here, α is an arbitrary design constant in consideration of variation due to environmental conditions such as ambient temperature.

  Simple equipment configuration by providing a time meter for measuring the actual engagement of the clutch 23 as described above and reporting when the actual engagement time exceeds the recommended replacement time stored in advance in the storage unit Thus, the operator is notified of the replacement timing of the clutch plate, which is the main element in the maintenance management of the clutch 23. Accordingly, it is possible to grasp the appropriate replacement time of the clutch plate without disassembling the clutch mechanism, and it is possible to realize an economical facility with good maintainability.

  When a hydraulic clutch is used as the clutch 23, a change in shape due to wear of the clutch plate appears as a change in hydraulic pressure for pressing the clutch plate. Therefore, in another embodiment of the present invention, a hydraulic pressure detection sensor for detecting the hydraulic pressure of the hydraulic clutch is provided, and a hydraulic pressure value in a fitted state at which the clutch plate is worn and becomes a recommended replacement stage is stored in advance. When the clutch engagement state hydraulic pressure detected by the oil pressure detection sensor becomes the recommended replacement level stored in the storage unit, the clutch plate state changes. Is in the recommended replacement stage, the control unit 30 issues a clutch plate replacement notification. Thereby, it is possible to grasp an appropriate replacement time with a simple configuration without disassembling the clutch mechanism.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the technical idea described in the claims and the specification and drawings. Is possible. For example, in the said embodiment, although the pump drainage machine station provided with the suction water tank 1 in the suction side and the discharge water tank 3 in the discharge side was demonstrated to the example, the pump installation which concerns on this invention is limited to such a pump drainage machine station. For example, it can be applied to a pump station where water levels are formed on the suction side and the discharge side, such as a pump station intended for flood control whose discharge side is a general river.

  The present invention starts the operation of the prime mover with the water absorption level below the impeller of the pump and the fitting / removing means being detached, and when the water absorption level rises and reaches the pump operation start water level above the pump impeller Since the control means for starting the operation of the pump by fitting the fitting / removing means with an arbitrarily adjusted fitting time is provided, it is possible to cause a malfunction by rotating the prime mover regardless of the water level in the suction water tank 1. It is possible to reduce the number of starting times of the prime mover, which is a cause of occurrence, and it can be used as highly reliable pump equipment.

DESCRIPTION OF SYMBOLS 1 Suction water tank 2 Pump installation floor 3 Discharge water tank 10 Suspension pipe 11 Bending discharge pipe 12 Discharge piping 13 Pump base 14 Pump casing 15 Suction bell mouth 16 Spindle 17 Pump impeller 18-1 Water lubrication bearing 18-2 Water lubrication bearing 20 Outside Bearing 21 Reducer 23 Clutch 24 Primer 26 Discharge Valve 27 Backflow Prevention Valve 30 Control Unit

Claims (8)

A pump, a reducer, a prime mover, a fitting / removing means for coupling the prime mover rotary shaft and the input shaft of the reducer directly or indirectly so as to be freely fitted or detached; an output shaft of the reducer; Connecting means for connecting the pump rotation shaft ,
The fitting / removing means is configured to be able to arbitrarily adjust the fitting time,
When the prime mover starts operating at a water absorption level below the impeller of the pump and the fitting / removing means is detached, and when the water absorption level rises and reaches the pump operation start water level above the pump impeller A pump facility comprising a control means for engaging the motor rotating shaft and the input shaft of the speed reducer with a fitting time adjusted to 3 seconds or more by the fitting / removing means to start operation of the pump. . In the pump installation according to claim 1,
Pumping equipment being characterized in that the wet clutch be selected the fitting disengaging means from the hydraulic clutch or Takashihai oil-fluid coupling for a fixed rate. In the pump equipment according to claim 1 or 2 ,
A pump facility characterized in that a rotation suppressing mechanism for preventing reverse rotation of the pump is provided between the fitting / removing means and the pump. A pump, a reducer, a prime mover, a fitting / removing means for coupling the prime mover rotary shaft and the input shaft of the reducer directly or indirectly so as to be freely fitted or detached; an output shaft of the reducer; Connecting means for connecting the pump rotation shaft ,
The fitting / removing means is an operation control device for pump equipment configured to be able to arbitrarily adjust the fitting time,
When the prime mover starts operating at a water absorption level below the impeller of the pump and the fitting / removing means is detached, and when the water absorption level rises and reaches the pump operation start water level above the pump impeller An operation control device for a pump facility, wherein the operation of the pump is started by fitting the motor rotating shaft and the input shaft of the speed reducer with a fitting time adjusted to 3 seconds or more by the fitting / removing means . In the operation control apparatus of the pump equipment according to claim 4 ,
It said fitting operation control device of the pump equipment, characterized in that the wet clutch be selected from Takashihai oil type fluid coupling of a hydraulic clutch or a fixed speed the disengaging means. In the operation control apparatus of the pump equipment according to claim 4 or 5 ,
Notification issued when the cumulative number of fittings of the fitting / removing means exceeds a predetermined number or when the product of the cumulative number of fittings and the fitting time exceeds a predetermined time An operation control apparatus for pump equipment, characterized in that means is provided. In the operation control apparatus of the pump equipment according to claim 4 or 5 ,
A rotational speed detector for detecting the rotational speed of a speed reducer provided between the pump or the fitting / removing means and the pump;
A time meter is provided for measuring the actual fitting time from the start of fitting of the fitting / removing means until the rotational speed detector detects the rated rotational speed of the pump or the speed reducer;
An operation control device for pump equipment, characterized in that a reporting means is provided for reporting when the actual fitting time measured by the hour meter is equal to or longer than a predetermined time. In the operation control apparatus of the pump equipment according to claim 4 or 5 ,
The fitting means is a hydraulic clutch,
Providing a hydraulic pressure detection means for detecting the hydraulic pressure of the hydraulic clutch;
An operation control device for pump equipment, characterized in that a reporting means is provided for reporting when the hydraulic pressure value detected by the hydraulic pressure detection means reaches a predetermined hydraulic pressure value.

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