JP6875841B2 - Offensive odor prevention type drainage system - Google Patents

Description

The present invention relates to a pump facility, a motor pump, a control device for controlling the motor pump, and a malodor prevention type drainage facility.

There is a drainage facility that temporarily stores a liquid containing impurities and filth, such as sewage, wastewater, or river water, in a water tank and drains it with a submersible pump. Here, if the liquid remains in the water tank for a long time, the liquid will be decomposed, causing a foul odor and toxic gas to be generated. For example, in an underground sewage pit located in the basement of a building and below the public sewer pipe, a small water tank (in the underground sewage pit) is used to prevent sewage from staying in the building for a long time. There is known a malodor prevention type drainage system in which a barrel) is installed so that the sewage in the water tank rises to the pump starting water level even with a small amount of sewage (Patent Document 1).

Furthermore, various measures have been taken to effectively discharge the liquid and prevent it from remaining in the water tank for a long time. In drainage facilities, a plurality of pumps are generally installed in a water tank in order to avoid interruption of drainage even if a pump fails. A technique is known in which a plurality of submersible pumps are installed in a water tank and the submersible pumps are stably operated according to the water level in the water tank by controlling the operation of the plurality of pumps, the backup operation, and the alternate operation (Patent Documents 2 and 3). ). When the submersible pump used in such a technique is continuously operated, it is desirable to operate the submersible pump in a state where the motor is submerged in the liquid in the water tank in order to cool the drive motor whose temperature has risen. In particular, in a submersible pump that handles sewage, which has a higher viscosity than fresh water, the torque of the motor increases during pump operation and the motor heats up and becomes hot. However, it is common to operate continuously.

On the other hand, unlike the above types of submersible pumps, a type that enables continuous operation for a certain period of time or longer even when the motor is exposed to the atmosphere (that is, the liquid water level is below the height of the motor). Motor pumps are also known (Patent Document 4).

Japanese Unexamined Patent Publication No. 2002-70142 Japanese Unexamined Patent Publication No. 2008-386777 Japanese Unexamined Patent Publication No. 2016-37930 Japanese Unexamined Patent Publication No. 2011-163263

When the malodor prevention type drainage system according to Patent Document 1 described above is used in a condominium or a commercial building, it usually takes time for the water level to rise to the starting water level of the submersible pump because there is almost no discharge of sewage during the midnight hours. It takes. In general, drainage facilities are planned based on the maximum amount of water in the building, so in condominiums where the number of residents has decreased due to the recent declining birthrate and aging population, the drainage tank at the time of planning is larger than the actual amount of sewage discharged. It is large and it may take time for the water level to rise to the starting water level of the submersible pump. Therefore, there is a risk that sewage will stay for a long time without starting the pump at night.

In Patent Documents 2 and 3, the starting water level or starting method of the pump is devised. Here, in the drainage facilities in factories, there are many sites where large sewage tanks are installed so that sewage discharged from the factories can be treated. Due to the recent heightened awareness of energy conservation, even factories that have been operating 24 hours a day may be completely shut down at midnight or on holidays. In that case, the sewage discharged in the factory at midnight or on holidays is only used by security guards in the toilet. Then, it is considered that the water level of the sewage tank hardly changes in a large-scale drainage facility for treating factory wastewater. That is, there is a possibility that the water level does not rise to the pump starting water level even if a device for lowering the pump starting water level is devised as in Patent Document 2.

Therefore, the motor pump that enables continuous operation for a certain period of time or longer even when the motor is exposed to the atmosphere is aggressive so that the pump can be driven even if the water level in the water tank does not reach the pump starting water level. Expected to be adopted. However, on the other hand, as in Patent Document 4, such a motor pump needs to be provided with a cooling structure, which leads to complicated equipment and high price. Further, it is conceivable to increase the capacity of the motor in order to prevent the motor from becoming hot, but the factory equipment will also be increased accordingly. Specifically, when the motor capacity is increased, not only the motor pump becomes larger, but also the power supply capacity needs to be increased due to the increase in the motor capacity, so that the power supply equipment also becomes larger.

The present invention has been made in view of the above points, and it is intended to provide a drainage facility in which a plurality of motor pumps are arranged and effectively operated so that the liquid does not remain in the water tank for a long time. It is one of the purposes. Another object of the present invention is to provide an appropriate arrangement mode for a specific type of motor pump that enables continuous operation for a certain period of time or longer even when the motor is exposed to the atmosphere. Further, one of the purposes is to realize an appropriate operation mode by mixing the conventional motor pump and the above-mentioned specific type of motor pump. In addition, one of the purposes is to provide a control device for appropriately operating the specific type of motor pump.

[Form 1] According to Form 1, a pump facility in which a plurality of motor pumps equipped with motors are arranged is provided in order to drain the liquid in the water tank. In such pump equipment, the plurality of motor pumps include the first type and the second type motor pumps, and the first type motor pumps are capable of continuous aerial operation for a certain period of time or longer, and the second type motor pumps. The motor pump is characterized in that continuous aerial operation for a certain period of time or longer is impossible. According to the first form, the first type and the second type of motor pumps can be mixed to realize efficient drainage of the liquid without leaving the liquid in the water tank for a long time. As a result, the amount of putrefaction of the liquid in the water tank can be reduced as much as possible, and the generation of foul odor can be suppressed.

[Form 2] According to the second form, in the pump equipment of the first type, a first period shorter than the period during which the second type motor pump enables continuous aerial operation is defined, and the first type motor pump is , The second type motor pump is not provided with a cooling mechanism that enables continuous aerial operation for the first period or longer, and does not include a cooling mechanism that enables continuous aerial operation for the first period or longer. According to the second form, the first type and the second type motor pumps to be mixed can be clearly separated.

[Form 3] According to Form 3, in the pump equipment according to Form 2, the first type motor pump and the second type motor pump enable continuous operation in water. According to the third form, by making the first type motor pump and the second type motor pump continuously operate in water, the motors of the first type motor pump and the second type motor pump are exposed to water. Even so, it is possible to realize a drainage facility that can drain water without breaking the motor pump.

[Form 4] According to Form 4, in the pump equipment of Form 2 or 3, the second type motor pump is arranged in the water tank. According to the fourth form, by using the second type motor pump in the water tank, if the water level in the water tank is equal to or higher than the pump exposed water level, the motor part of the second type motor pump is cooled by the liquid in the water tank. Therefore, it is possible to realize a drainage facility capable of effectively operating the second type motor pump.

[Form 5] According to the fifth form, the pump equipment according to any one of the second to fourth forms, that is, a water level detector that detects the water level in the water tank, a control device that controls the operation of a plurality of motor pumps, and the like. The water level detector can detect the pump exposed water level where the second type motor pump is exposed in the air, and the control device measures the period when the water level in the water tank is lower than the pump exposed water level. When the first period elapses when the water level in the water tank is lower than the pump exposed water level, the second type motor pump is in the stopped state. According to the fifth embodiment, the failure of the motor pump can be prevented by controlling the second type motor pump so as not to be improperly operated in the air continuously. In addition, by effectively controlling the drainage of the liquid so that the liquid does not remain in the water tank for a long time by the motor pump of the first type that can operate continuously in the air while the motor pump of the second type is stopped. , The amount of putrefaction of the liquid in the water tank can be reduced as much as possible, and the generation of foul odor can be suppressed.

[Form 6] According to Form 6, in the pump equipment of Form 5, the control device has a period in which the second type motor pump is continuously operated in the air while the water level is lower than the pump exposed water level as the second period. The stop period from the stop of the continuous aerial operation of the second type motor pump to the restart of the stopped second type motor pump shall be longer than the second period, and during the stop period. Allows operation of only the first type motor pump or the second type motor pump other than the stopped second type motor pump. According to the sixth embodiment, by providing a second period as a period for cooling the motor after the second type motor pump has been continuously operated in the air, when the second type motor pump that has been continuously operated in the air is restarted. It can prevent the product from breaking down due to high temperature. In addition, during the suspension period of the second type motor pump that has been continuously operated in the air, the amount of putrefaction of the liquid in the water tank is reduced as much as possible by operating the other first type and second type motor pumps. The generation of foul odor can be suppressed. Further, the first type and the second type motor pumps can be effectively utilized, and the failure of the second type motor pump can be prevented.

[Form 7] According to Form 7, in the pump equipment of Form 5 or 6, the control device further includes a storage unit for storing the operation history of the previously operated motor pump, and the water level detector is the pump exposed water level. The pump start water level, which is a higher water level, can be detected, and when the pump start water level is detected, the control device starts the motor pump determined based on the operation history stored in the storage unit. According to the seventh embodiment, the motor pump to be operated can be effectively selected by realizing the rotation operation of the motor pump, and the inside of the drainage facility can be specified by equalizing the pump operation time and the number of starts and stops. Motor pumps can be prevented from reaching their replacement life.

[Form 8] According to Form 8, in the pump equipment of Form 7, two or more second type motor pumps are provided, and the starting motor pump determined based on the operation history is selected from the second type motor pumps. Will be done. According to the eighth embodiment, in this drainage facility in which the first type motor pump is preferentially operated when the water level is lower than the exposed water level of the pump, the first type is preferentially operated when the water level in the water tank is higher than the exposed water level of the pump. By starting two types of motor pumps, the operating period and the number of operations of the motor pumps can be leveled. Further, by effectively selecting the motor pump to be operated, it is possible to equalize the operation period and the number of operations of the motor pump of this drainage facility.

[Form 9] According to the ninth form, in the pump equipment of the seventh or eighth form, the number of motor pumps to be operated is determined by a plurality of set pump starting water levels. According to the ninth embodiment, the control of the drainage of the liquid can be set more flexibly.

[Form 10] According to the tenth form, in any of the pump equipments of the seventh to the ninth forms, the water level detector can detect the pump stop water level which is lower than the pump exposed water level, and a plurality of control devices are provided. When all of the motor pumps are stopped and the pump stop water level is detected but the pump start water level is not detected, the control device measures the third period, and when the third period is longer than the predetermined fourth period, the control device , Operate the first type motor pump. According to the tenth aspect, even when the water level does not rise to the pump starting water level, the first type motor pump can be continuously operated in the air for a certain period of time or more, and the liquid is suppressed from being accumulated in the water tank. be able to. In particular, when the liquid is sewage, it is possible to prevent the generation of foul odors and toxic gases by operating a motor pump to create a water flow.

[Form 11] According to the eleventh form, in any of the pump equipments of the first to tenth forms, the first type motor pump is arranged at a position lower than that of the second type motor pump. According to the eleventh form, the residual amount of the liquid in the water tank can be reduced as much as possible, and efficient drainage of the liquid can be realized.

[Form 12] According to the form 12, in any of the pump equipments of the second to tenth forms, the cooling mechanism provided by the first type motor pump includes cooling fins provided around the motor. According to the twelfth form, the first type motor pump can be mounted at a relatively low cost.

[Form 13] According to the thirteenth aspect, in any of the pump equipments of the second to tenth forms, the cooling mechanism provided by the first type motor pump includes a cooling jacket provided around the motor, and the pump is provided on the cooling jacket. It is configured to guide the pumping. According to the thirteenth aspect, the first type motor pump can be mounted with an effective cooling effect.

[Form 14] According to the 14th form, in any of the pump equipments of the 2nd to 10th forms, the cooling mechanism provided in the first type motor pump includes a cooling jacket provided around the motor and cools the cooling jacket. It is configured to be filled with water. According to the fourteenth form, the handling liquid can be cooled without entering the motor portion. Then, a first-class motor pump that is easy to maintain can be mounted.

[Form 15] According to the form 15, in any of the pump equipments of the second to tenth forms, the cooling mechanism provided in the first type motor pump is provided with a cooling rod. According to the fifteenth aspect, the first type motor pump can be mounted with a simple structure.

[Form 16] According to Form 16, a motor pump is provided, and such a motor pump is provided in the pump equipment according to any one of Forms 1 to 15.

[Form 17] According to the 17th form, the malodor prevention type drainage facility is provided, and the pump facility according to any one of the 1st to 15th forms is applied to the malodor prevention type drainage facility.

[Form 18] According to Form 18, a control device for controlling a plurality of motor pumps for draining the liquid in the water tank is provided. Such a control device can receive the water level data in the water tank detected by the water level detector, and the plurality of motor pumps include the first type and the second type motor pumps. The control device is provided with a cooling mechanism that enables continuous aerial operation for the first period or longer, and the second type motor pump does not have a cooling mechanism that enables continuous aerial operation for the first period or longer. However, it is determined whether or not all of the plurality of motor pumps are in the stopped state, and based on the water level data, the second period in which the water level in the water tank is lower than the predetermined water level is measured, and in the stopped state. Yes, it is determined whether the second period is longer than the predetermined third period, and when it is in the stopped state and the second period is longer than the predetermined third period, the first type motor pump is operated. , Works like. According to the eighteenth aspect, the first type and the second type of motor pumps can be mixed to realize efficient drainage control of the liquid without leaving the liquid in the water tank for a long time. As a result, the amount of putrefaction of the liquid in the water tank can be reduced as much as possible, and the generation of foul odor can be suppressed. Further, even when the water level has not risen to the pump starting water level, the first type motor pump can be continuously operated in the air for a certain period of time or longer, and the accumulation of liquid in the water tank can be suppressed. In particular, when the liquid is sewage, it is possible to prevent the generation of foul odors and toxic gases by operating a motor pump to create a water flow.

[Form 19] According to Form 19, a control device for controlling a plurality of motor pumps for draining the liquid in the water tank is provided. Such a control device can receive the water level data in the water tank detected by the water level detector, and the plurality of motor pumps include the first type and the second type motor pumps. The control device is provided with a cooling mechanism that enables continuous aerial operation for the first period or longer, and the second type motor pump does not have a cooling mechanism that enables continuous aerial operation for the first period or longer. However, based on the water level data, the second period in which the water level in the water tank is lower than the pump exposed water level at which the second type motor pump is exposed in the air is measured, and the second period is the first period. When they become equal, the second type motor pump that has been continuously operated in the air is operated so as to be in a stopped state. According to the nineteenth aspect, the first type and the second type of motor pumps can be mixed to realize efficient drainage control of the liquid without leaving the liquid in the water tank for a long time. Further, by controlling the second type motor pump so as not to be inappropriately continuously operated in the air, it is possible to prevent the motor pump from malfunctioning. Furthermore, by operating the first type motor pump that can operate continuously in the air while the second type motor pump is stopped, the drainage of the liquid is effectively prevented so that the liquid does not remain in the water tank for a long time. By controlling, the amount of putrefaction of the liquid in the water tank can be reduced as much as possible, and the generation of foul odor can be suppressed.

[Form 20] According to Form 20, in the control device of Form 19, other than the first type motor pump or the second type motor pump that is stopped while the second type motor pump is stopped. Only the second type of motor pump can be operated. According to Form 20, by providing a period for cooling the motor after the second type motor pump has been continuously operated in the air, the second type motor pump that has been continuously operated in the air becomes hot during restart and fails. Can be prevented. In addition, during the suspension period of the second type motor pump that has been continuously operated in the air, the amount of putrefaction of the liquid in the water tank is reduced as much as possible by operating the other first type and second type motor pumps. The generation of foul odor can be suppressed. Further, the first type and the second type motor pumps can be utilized, and the failure of the second type motor pump can be prevented.

[Form 21] According to Form 21, a malodor prevention type drainage facility is provided, and the malodor prevention type drainage facility is housed in a pit which is a drainage tank installed at a position lower than a sewer pipe and drained. It is equipped with a sewage tank for temporarily storing liquid, a first-type motor pump provided outside the sewage tank in the pit and connected to the sewage tank, and a second-type motor pump provided inside the sewage tank. The first type motor pump is provided with a cooling mechanism that enables continuous aerial operation for a predetermined period or longer, and the second type motor pump is provided with a cooling mechanism that enables continuous aerial operation for a predetermined period or longer. do not. According to the 21st form, the motor pumps of the first type and the second type can be mixed to realize efficient drainage of the liquid without leaving the liquid in the water tank for a long time. Further, by using the first type motor pump provided outside the sewage tank, maintenance becomes easy. Further, if the water level in the water tank is equal to or higher than the pump exposure water level, the motor portion of the second type motor pump can be cooled by the liquid in the water tank, so that the second type motor pump can be operated effectively. It is possible to realize a malodor prevention type drainage system that can be used. As a result, the amount of putrefaction of the liquid in the water tank can be reduced as much as possible, and the generation of foul odor can be suppressed.

[Form 22] According to the form 22, the malodor prevention type drainage facility of the form 21, the operation of the water level detector for detecting the water level in the sewage tank, the operation of the first type motor pump and the second type motor pump. The water level detector can detect the pump exposed water level at which the second type motor pump is exposed in the air, and the control device can detect the pump exposed water level in the sewage tank. When a period lower than the water level is measured and a period in which the water level in the sewage tank is lower than the pump exposed water level elapses for a predetermined period, the second type motor pump is in the stopped state. According to the form 22, failure of the motor pump can be prevented by controlling the second type motor pump so as not to be operated improperly. In addition, by operating the first type motor pump, which can operate continuously in the air while the second type motor pump is stopped, the drainage of the liquid is effectively prevented so that the liquid does not remain in the water tank for a long time. By controlling, the amount of putrefaction of the liquid in the water tank can be reduced as much as possible, and the generation of foul odor can be suppressed.

[Form 23] According to Form 23, a pump facility is provided, which includes a plurality of submersible motor pumps for draining liquid in the water tank, a water level detector for detecting the water level in the water tank, and underwater. A control device for controlling the operation of the motor pump, and at least one of the submersible motor pumps is a submersible motor pump capable of continuous aerial operation equipped with a cooling mechanism capable of continuous aerial operation, and water level detection. The device detects the pump exposed water level at which the submersible motor pump is exposed in the air and the pump stop water level which is lower than the pump exposed water level, and the control device detects that the water level is lower than the pump exposed water level and the pump. After a predetermined period of time has passed at a state higher than the stop water level, drainage is performed with a submersible pump capable of continuous aerial operation. According to Form 23, by adopting a submersible motor pump capable of continuous aerial operation for at least one of the submersible motor pumps, the liquid can be efficiently drained without leaving the liquid in the water tank for a long time. Control can be realized. As a result, the amount of putrefaction of the liquid in the water tank can be reduced as much as possible, and the generation of foul odor can be suppressed. Further, even when the water level does not rise to the exposed water level of the pump, it is possible to suppress the accumulation of liquid in the water tank by continuously operating the submersible motor pump capable of continuous aerial operation. In particular, when the liquid is sewage, it is possible to prevent the generation of foul odors and toxic gases by operating a motor pump to create a water flow.

It is an overall block diagram of the pump equipment by one Embodiment. It is an overall block diagram of the pump equipment by another embodiment. It is a block diagram of the control device by one Embodiment. It is a table figure which manages a motor pump in the control device by one Embodiment. It is a state transition diagram of a motor pump. It is a control flow diagram of the control device by one Embodiment. It is a control flow diagram of the control device by one Embodiment. It is a control flow diagram of the control device by one Embodiment. It is a control flow diagram of the control device by one Embodiment. It is an operation example of the pump equipment by one Embodiment. It is an operation example of the pump equipment by one Embodiment. It is a schematic diagram of the malodor prevention type drainage facility by one Embodiment. It is a schematic diagram of the malodor prevention type drainage facility by one Embodiment. It is a schematic diagram of the malodor prevention type drainage facility by one Embodiment. It is a schematic diagram which shows the structure of the 2nd type motor pump by one Embodiment. It is a schematic diagram which shows the structure of the 1st type motor pump by one Embodiment. It is a schematic diagram which shows the structure of the 1st type motor pump by one Embodiment. It is a schematic diagram which shows the structure of the 1st type motor pump by one Embodiment. It is a schematic diagram which shows the structure of the 1st type motor pump by one Embodiment.

Hereinafter, embodiments of the pump equipment, the motor pump, the control device for controlling the motor pump, and the malodor prevention type drainage equipment according to the present invention will be described together with the accompanying drawings. In the accompanying drawings, the same or similar elements are designated by the same or similar reference numerals, and duplicate description of the same or similar elements may be omitted in the description of each embodiment. In addition, the features shown in each embodiment can be applied to other embodiments as long as they do not contradict each other.

(First Embodiment)
The overall configuration of the pump equipment 10a according to the first embodiment will be described with reference to FIG. 1A. The pump equipment 10a drains various liquids such as fresh water, reclaimed water, rainwater, sewage, etc. stored in the water tank 20 (hereinafter, collectively referred to as "liquid", also referred to as "liquid"). Therefore, a plurality of motor pumps equipped with motors are arranged. Specifically, the pump equipment 10a includes a water tank 20, motor pumps P1, P2 and Px arranged on the bottom surface 20b of the water tank 20, a water level detector 40 for detecting the water level of the water tank, motor pumps P1, P2 and A control device 100 for controlling each operation of the Px is provided.

The water tank 20 has a substantially rectangular parallelepiped shape (box shape) as a whole, and has an internal space defined by a bottom surface 20b, a side surface 20s, and a top surface 20u. The water tank 20 includes an inflow pipe 12 and an outflow pipe 21. When any one or more of the motor pumps P1, P2 and Px is operated with the liquid flowing into and stored in the water tank 20 through the inflow pipe 12, the outflow connected to the motor pumps P1, P2 and Px. The liquid is drained to the outside of the water tank 20 through the pipe 21. The pump equipment 10a may be further provided with a pre-swivel tank (not shown) on the bottom surface 20b of the water tank 20 so as to entrain and discharge suspended matter or sediment in combination with the motor pumps P1, P2 and Px. Good.

Each of the motor pumps P1, P2 and Px has a suction port (for example, 222a in FIG. 13) and applies a rotational driving force to the pump casing portion 2 accommodating the impeller (for example, 221 in FIG. 13) and the impeller. The provided motor unit 4 is provided. The configurations of the motor pumps P1, P2 and Px will be described later with reference to FIGS. 13 to 17. In the present embodiment, each of the motor pumps P1, P2 and Px is preferably a submersible pump such as a canned motor pump that can be continuously operated in water. As a result, it is possible to realize a drainage facility capable of draining water without breaking down even if the motor of each motor pump is flooded. In the present specification, the motor pump P1 in a state where the motor parts 4 of P1, P2 and Px are exposed in the air on the liquid surface (that is, the water level of the liquid is equal to or lower than the motor part 4 requiring cooling). The continuous operation by P2 and Px is called "continuous aerial operation". Hereinafter, in the present embodiment, the number of motor pumps will be described as three (P1, P2 and Px), but two or four or more may be used. Further, as described below, the motor pumps P1, P2 and Px are classified into either the first type motor pump or the second type motor pump. Here, the motor pump Px is a first-class motor pump, and the motor pumps P1 and P2 are second-class motor pumps.

The first type motor pump Px enables continuous aerial operation for a longer period of time than the second type motor pump P1 or P2. Specifically, the first type motor pump is provided with a cooling mechanism for cooling the motor unit 4 (details will be described later in FIGS. 14 to 17), while the second type motor pump is a motor. It is assumed that the cooling mechanism for cooling the part 4 is not provided (details will be described later in FIG. 13). Alternatively, in the first type motor pump, it is sufficient that the temperature of the motor unit 4 during continuous operation in the air can be suppressed to a temperature equal to or lower than the temperature at which the motor pump fails by increasing the motor capacity instead of the cooling mechanism.

Since the first type motor pump Px is provided with a cooling mechanism described later, the temperature of the motor unit 4 is above a certain value (the temperature at which the motor pump may fail) even if continuous air operation is performed. It is kept in a state where it does not rise to. In the present specification, this is defined as continuous aerial operation is possible. That is, the fact that continuous aerial operation is possible means that even if the water level in the water tank 20 continues to be lower than that of the motor unit 4, the water can be effectively drained.

Since the second type motor pumps P1 and P2 do not have a cooling mechanism, the temperature of the motor unit 4 gradually rises during continuous aerial operation. Therefore, in the second type motor pump, the temperature of the motor unit 4 fails only within a predetermined time limit (for example, 30 minutes) after the motor unit 4 begins to be exposed in the air. It is not possible to continuously operate in the air without reaching a temperature at which there is a risk. In this respect, the second type motor pump can prevent a failure caused by a temperature rise of the motor unit 4 by disabling continuous aerial operation for the above-mentioned predetermined period or longer. In the present specification, the possibility that the motor pumps P1 and P2 may fail due to continuous aerial operation for a predetermined time limit or longer is defined as impossible for continuous aerial operation for a predetermined time limit or longer.

Further, since the second type motor pumps P1 and P2 do not have a cooling mechanism for cooling the motor unit 4, the temperature of the motor unit 4 that has risen due to continuous aerial operation within a predetermined limited period is increased. After the motor pumps P1 and P2 are stopped, the motor pumps P1 and P2 are naturally cooled by the outside air or the liquid in the water tank, so that the temperature is gradually lowered. As a period for that purpose, a restart prohibition period is provided between the time when the second type motor pumps P1 and P2 are continuously operated in the air and then stopped and the motor pumps P1 and P2 are operated again. Here, the longer the continuous aerial operation period is, the higher the temperature of the motor unit 4 may be. Therefore, the continuous aerial operation period and the restart prohibition period may be associated with each other. As an example, the restart prohibition period may be longer than the immediately preceding continuous aerial operation period. Further, temperature sensors (not shown) are provided in the motor pumps P1 and P2, the temperatures of the motor pumps P1 and P2 are taken into the control device 100, and the period until the motor pumps P1 and P2 become the operable temperature or less is restarted. It may be a prohibited period.

As described above, the first type motor pump Px enables continuous aerial operation for a predetermined time limit or longer, and the second type motor pumps P1 and P2 perform continuous aerial operation for a predetermined time limit period or longer. Make it impossible. Here, since the amount of liquid flowing into the water tank 20 is small during continuous aerial operation, only one of the plurality of motor pumps P1, P2 and Px is used as the first motor pump Px. It is preferable to use two types of motor pumps P1 and P2 of the second type, which have a simple structure and are inexpensive. By doing so, it is possible to realize a pump facility 10a having a high drainage capacity by preventing retention in the water tank at a low cost. Further, the number of the first type motor pumps is not limited to one, and the same effect can be obtained if the number is smaller than the number of the second type motor pumps.

As an example of the present embodiment, the motor pumps P1, P2 and Px are single-suction single-stage centrifugal pumps that handle sewage and miscellaneous wastewater having a solid matter size of 20 mm or less contained in the transport liquid.

The water level detector 40 detects the water level of the current liquid in the water tank 20. In the example of FIG. 1A, the water level detector 40 is a float type. Specifically, the water level detector 40 detects a float 40a for detecting the pump stop water level FL, a float 40b for detecting the pump exposed water level FP, a float 40c for detecting the pump start water level FH1, and a full water level FHn. A float 40n and the like are provided.

According to the present embodiment, the pump stop water level FL is a water level for stopping the motor pumps P1, P2 and Px below the pump stop water level FL, and all the pumps of the motor pumps P1, P2 and Px in the water tank 20. It is preferable to set the height equal to or higher than the suction port of the casing portion 2 and to the same height as the suction port as much as possible. As a result, the motor pumps P1 and P
It is possible to prevent 2 and Px from sucking air during operation, and to minimize the amount of liquid remaining in the water tank 20 after the motor pumps P1, P2 and Px are stopped. The pump exposed water level FP is a water level at which the liquid level in the water tank 20 is below the pump exposed water level FP and the portion of the motor unit 4 that requires cooling is exposed from the liquid level. The water level at which the pumps P1, P2 and Px are operated continuously in the air.

The pump exposed water level FP may be set individually for the second type pumps P1 and P2 according to the height of the mechanism that requires cooling during continuous operation. This is because the water level at which the motor unit 4 is exposed to the air and interferes with continuous aerial operation differs depending on the type of pump and the structure of the motor. Specifically, the pump exposed water level FP is generally located higher than the upper ends of the rotor and the stator (for example, 242 and 243 in FIG. 13) in the motor unit 4. For example, as a mechanism of the motor unit 4, when the drive power cable (for example, 245 in FIG. 13) connected to the upper part of the motor unit 4 also needs to be cooled, the pump exposed water level FP is set to several centimeters above the cable. Should be set. As another example, the pump exposed water level FP may be a position where the bearing (for example, 246 in FIG. 13), which is a sliding portion in the motor portion 4 and generates heat, is submerged.

The pump starting water level FH1 is a water level at which the motor pumps P1, P2 and Px are started at the pump starting water level FH1 or higher, and is set at a position higher than the pump exposed water level FP. The pump exposed water level FP and the pump starting water level FH1 may be the same. The full water level FHn is set at a position higher than the pump starting water level FH1, and when the full water level FHn or higher is reached, the water level at which all the motor pumps P1, P2, and Px that can be operated at the same time are started. Further, the full water level FHn may be used as a reference for determining the full water state of the water tank 20 at the full water level FHn or higher.

The control device 100 is connected to the motor pumps P1, P2 and Px and the water level detector 40 by a cable, and controls the operation of the motor pumps P1, P2 and Px according to the water level FL, FP, FH1 and FHn described above. .. As shown, the control device 100 is connected to each of the motor pumps P1, P2 and Px through the power cable 50, and is connected to the water level detector 40 through the signal cable 41. It may also be connected to an external commercial power supply (not shown). With this connection, the control device 100 supplies a drive power source to each motor unit 4 for each of the motor pumps P1, P2 and Px in response to the water level detection signals (40a, 40b, 40c and 40n) from the water level detector 40. Appropriately control and supply, and start / stop each motor pump P1, P2 and Px. The control device 100 can implement various functions for controlling each operation of the motor pumps P1, P2 and Px. Further, the control device 100 may be equipped with an inverter for controlling the motor pumps P1, P2 and Px at variable speeds.

In the pump equipment 10a of the present embodiment, the motor pump Px of the first type and the motor pumps P1 and P2 of the second type are mixed in order to discharge the liquid in the same water tank, and the liquid is lengthened in the water tank 20. Efficient drainage of the liquid can be realized without leaving it for a long time. As a result, the amount of putrefaction of the liquid in the water tank 20 can be reduced as much as possible, and the generation of foul odor can be suppressed. Further, the control device 100 realizes the operation suitable for a plurality of types of motor pumps, and controls the second type motor pumps P1 and P2 so as not to be inappropriately continuously operated in the air. It is possible to prevent a failure due to a temperature rise of the motor unit 4 of the motor pumps P1 and P2.

(Second Embodiment)
The overall configuration of the pump equipment 10b according to the second embodiment will be described with reference to FIG. 1B. The description overlapping with the first embodiment described with reference to FIG. 1A will be omitted. In the second embodiment, the first type pump Px is arranged at a lower position than the second type pumps P1 and P2. In particular,
In FIG. 1A, the bottom surface 20b of the water tank 20 is a flat surface, but as shown in FIG. 1B, in the second embodiment, a recess is provided in the bottom surface 20'b of the water tank 20', and the bottom surface of the recess is of the first type. The motor pump Px is arranged. Here, it is preferable to use the float 40z to set the pump stop water level of the motor pump Px to the height of the suction port of the motor pump Px.

In the pump equipment 10b of the present embodiment, the motor pump Px is continuously operated in the air while continuously guiding the liquid to the recess even after the water level drops below the stop water level FL of the second type pumps P1 and P2. This makes it possible to lower the water level of the liquid level to the height of the suction port of the motor pump Px. Further, the bottom surface 20'b of the water tank 20'may be provided with an inclination so that the height tends to increase as the distance from the recess in which the motor pump Px is arranged increases and the height tends to decrease as the height approaches the recess (not shown). .. This makes it possible to more effectively guide the sewage or the like in the water tank 20'to the recess, and it is further advantageous in that the stored liquid can be efficiently drained by the motor pump Px without staying. As described above, in the pump equipment 10b according to the present embodiment, by arranging the pump Px of the first type at a position lower than the pumps P1 and P2 of the second type, the advantages of the pump equipment according to the above-mentioned first embodiment can be obtained. In addition, the residual amount of the liquid in the water tank 20'can be reduced as much as possible. That is, efficient drainage of liquid can be realized. Thereby, the generation of bad odor in the pump equipment 10b can be suppressed.

Throughout the first embodiment and the second embodiment, the number of motor pumps arranged in the water tank 20 (20') may be arbitrary. A plurality of motor pumps of the first type may be provided, or a plurality of motor pumps of the second type may be provided. Except for those described above, the arrangement positions and arrangement orders of the motor pumps P1, P2 and Px may be arbitrary. Not only all the motor pumps P1, P2 and Px may be arranged on the bottom surface 20b (20'b) of the water tank 20 (20'), but also on the side surface 20s (20's) along the direction of gravity. Further, since the first type motor pump Px can be continuously operated in the air, it is installed and operated outside the water tank 20 (20') in addition to being installed and operated inside the water tank 20 (20'). You may. Specifically, by connecting the suction port of the first type motor pump Px to the suction pipe connected to the outlet of the water tank 20 (20'), the first type motor pump can be connected to the water tank 20 (20'). ) May be installed and operated (described later in FIG. 11).

Further, in the first embodiment and the second embodiment, the motor pump Px of the first type is cooled to cool the motor unit 4 that enables continuous aerial operation for a predetermined limited period (for example, 30 minutes) or more. It is equipped with a mechanism. Here, first, an example of the structure of the second type motor pump not provided with the cooling mechanism will be described with reference to FIG. Unless otherwise specified, the same reference numerals are used for the same configurations in the following description of FIGS. 13 to 17 regarding the motor pump, and the description thereof will be omitted.

As shown in FIG. 13, the second type motor pumps P1 and P2 include an impeller 221 that rotates about the axis AL, a pump casing portion 2 that houses the impeller 221 and a pump bracket 223. The impeller 221 is connected to the main shaft 241 of the motor unit 4 and rotates with the rotation of the main shaft 241. The pump casing portion 2 has a suction port 222a and a discharge port 222b, and defines a water flow path together with the pump bracket 223. The pump bracket 223 is engaged with the pump casing portion 2 by using a screw (not shown) or the like to cover the back surface (upper side in FIG. 1) of the impeller 221. The pump bracket 223 is preferably formed of a material having high thermal conductivity, for example, an aluminum alloy or a copper alloy.

The motor unit 4 provides the impeller 221 with a rotational driving force. The motor unit 4 includes a spindle 241 that rotates about the axis AL, a rotor 242 that rotates integrally with the spindle 241 and a stator 243 provided on the outer peripheral side of the rotor 242. Further, the motor unit 4 includes a motor frame 244. The motor frame 244 is formed in a substantially cylindrical shape, and the stator 24 is formed on the inner peripheral surface.
3 is fixed. The motor frame 244 may be made of stainless steel or a metal such as an aluminum alloy or a copper alloy. The impeller 21 is rotated by the drive of the motor unit 4 to pressurize the conveyed liquid, so that water is pumped from the suction port 222a to the discharge port 222b.

Subsequently, the structure of the first type motor pump Px provided with the cooling mechanism will be described with reference to FIGS. 14 to 17. An example of the cooling mechanism of the first type motor pump Px is shown in FIG. In FIG. 14, cooling fins 250 are provided around the motor unit 4, and outside air is introduced through the cooling fins 250. Cooling fins 250 are provided on the outer periphery of the motor frame 244 to cool the motor unit 4 by air-cooling and dissipating heat generated by the motor unit 4. The structure is simple and can be implemented at a relatively low cost. By adopting the motor unit 4 having a capacity larger than the capacity required for pumping water, it is possible to further suppress the heat generation of the motor unit 4.

Another example of the cooling mechanism of the first type motor pump Px is shown in FIG. In FIG. 15, a cooling jacket 260 is provided on the outer periphery of the motor frame 244, and the pumped water pressurized by the impeller 221 is guided between the cooling jacket 260 and the motor frame 244 from the introduction port 261. The pumped water that has passed between the cooling jacket 260 and the motor frame 244 is discharged from the return pipe 262. That is, a part of the pumped water by the motor pump Px is used as the cooling water for the motor unit 4. The structure has a higher cooling effect than the structure of the cooling fin in FIG.

Another example of the cooling mechanism in the first type motor pump Px is shown in FIG. In FIG. 16, a cooling jacket 270 may be provided on the outer periphery of the motor frame 244 so that the cooling liquid is sealed in the cooling jacket 270. This coolant is sealed between the motor frame 244 and the cooling jacket 270 in order to cool the heat generated by the motor unit 4, and propylene glycol or the like is used as an example. Further, the circulation blade 271 attached to the spindle 241 is rotated to circulate the coolant in the cooling jacket 270. By this circulation, heat is exchanged between the motor unit 4 and the pump casing unit 2, and the heat generated by the motor unit 4 can be released to the transport liquid. In the case of this structure, since the transport liquid (sewage) in the motor pump Px does not enter between the cooling jackets 270, the motor unit 4 can be cooled without being affected by the liquid quality of the transport liquid, and maintenance, especially cleaning, can be performed. It will be easy.

An example of a further cooling structure of another type 1 motor pump Px is shown in FIG. In FIG. 17, a cooling rod 251 is provided in the motor unit 4 as a cooling mechanism. Specifically, the cooling rod 251 extends into the space of the pump bracket 223, penetrates the lubricating oil 227 of the bearing 246, and is arranged in the motor unit 4. The pump bracket 223 defines the flow path of the conveyed liquid in the motor pump Px together with the pump casing portion 2, and comes into contact with the conveyed liquid in the motor pump Px. Therefore, the heat generated in the motor portion 4 is pumped through the cooling rod. It is transmitted to the bracket 223, and the cooling rod is cooled by the transport liquid in the motor pump Px. As a result, the cooling effect of the motor unit 4 can be improved with a simple structure.

In the first and second embodiments, the second type motor pumps P1 and P2 are arranged in the water tanks 20 and 20'as shown in FIGS. 1A and 1B. The second type motor pumps P1 and P2 do not have the cooling structure of the motor unit 4 as described above, but when used in the water tank 20 (20'), the water level in the water tank 20 (20') can be raised. If the pump exposed water level is FP or higher, the motor unit 4 of the second type motor pumps P1 and P2 can be cooled by the liquid in the water tank 20 (20'), so that the second type motor pumps P1 and P2 are used. It can be operated continuously effectively. On the other hand, when the control device 100 enables flexible control of the operation based on the above-mentioned stop period, operation period, restriction period, restart prohibition period, etc., it is operated outside the water tank 20 (20'). You may. Specifically, as in the case of the first type motor pump Px, the outlets (not shown) of the water tanks 20 and 20'are provided, and the suction pipe (not shown) connected to the outlet is provided with the second type. By connecting the suction ports 222a of the motor pumps P1 and P2 of the above, the second type motor pumps P1 and P2 may be operated outside the water tank 20 (20').

In all the embodiments described above, the float type water level detector 40 is not limited to the one installed in the water tank 20 (20'). For example, floats (40a, 40b, 40c and 40n) may be installed at given relative positions for each of the motor pumps P1, P2 and Px. Regarding the second type motor pumps P1 and P2, if continuous aerial operation is performed beyond the limit period, it may cause a failure. Therefore, the second type motor pumps can be individually managed so that the pump exposed water level FP can be managed individually. Floats may be installed for each of P1 and P2. In addition to the float type, the water level detector 40 can also be applied to an analog type water level detector such as a throw-in type water level sensor, and an electrode rod can also be applied to pump equipment mainly for fresh water. Further, in the pump equipments 10a and 10b of the present embodiment, the water level detected by the water level detector 40 is not limited to the FL to FHn. For example, a further pump starting water level may be provided between the pump starting water level FH1 and the full water level FHn as the pump additional water level FH2, FH3, etc., and the pump starting water level FH1 and the pump additional water level FH2, FH3 ... The number may be specified according to the number of motor pumps included in the pump equipment 10a or the pump equipment 10b. In this case, the number of motor pumps to be operated may be determined by the plurality of pump start / additional water levels set, and the control of liquid drainage can be set more flexibly. It will be easily understood by those skilled in the art that the number of floats of the water level detector 40 is determined according to the number of water levels requiring detection.

(Control of motor pump by control device)
The control device 100 for controlling the operation of the plurality of motor pumps P1, P2 and Px according to all the above-described embodiments will be described with reference to FIGS. 2 to 8. FIG. 2 is an exemplary functional block diagram of the control device 100. FIG. 3 is an exemplary table diagram stored in the control device 100 used in information processing. FIG. 4 is a state transition diagram of the motor pump. 5 to 8 are control flow diagrams showing information processing.

In the following description, when it is not necessary to distinguish between the pump equipment 10a and the pump equipment 10b, the pump equipment 10 is described, and the water tank 20 and the water tank 20'are described as the water tank 20. Further, unless otherwise specified, the stop water level 40z of the motor pump Px in FIG. 1B is the pump stop water level FL.

As shown in FIG. 2, the control device 100 includes a detection unit 120 that detects the water level of the liquid in the water tank 20 and the states of the motor pumps P1, P2, and Px, a processing unit 140 that executes each information processing, and various information. Includes a storage unit 160 for storing the information. Each functional block is implemented as part of software and / or hardware. In addition to the above, a display unit that displays the status of the motor pumps P1, P2 and Px and the water tank 20, commands the operation of each motor pump P1, P2 and Px to be stopped, and an operation for changing various set values is performed. An operation unit or the like may be provided. Further, the control device 100 may be a control panel composed of only a relay sequence. The functional block of FIG. 2 is an example, and is not limited thereto.

The detection unit 120 and the processing unit 140 in FIG. 2 are mounted by a processing device such as a CPU (Central Processing Unit). The detection unit 120 includes a water level detection unit 122 that detects the water level of the liquid by interaction with the water level detector 40, and a pump state detection unit 124 that detects the pump state by interaction with each of the motor pumps P1, P2 and Px. ,including. The water level detection unit 122 receives the water level data by the floats 40a, 40b, 40c and 40n detected by the water level detector 40, and determines, for example, the water levels FL, FP, FH1 and FHn of FIG. Determine the water level state as to how long the water level is in the water level range. Further, in cooperation with the timer unit 142, the period in which each water level state is specified is specified based on the water level data. The pump state detection unit 124 may, for example, detect the currents of the motor units 40 of the motor pumps P1, P2 and Px to determine the operating status (for example, start / stop / failure, etc.), thermal or the like. Failure detectors may be added to receive those signals. Further, the operation command and the stop command of the pump command unit 146 may be substituted for the determination of the start / stop of each of the motor pumps P1, P2 and Px.

The processing unit 140 has a timer unit 142 that measures a period in a specific water level state and a timer that measures a period according to the operating status of each of the motor pumps P1, P2, and Px so as to realize the operation of the control flow described later. A unit 144 and a pump command unit 146 that commands start / stop of each motor pump P1, P2, and Px are included.

For example, the control device 100 measures the period of continuous air operation in the second type motor pump P1 or P2 by the timer unit 144, and the pump command unit 146 determines the continuous air operation in the motor pump P1 or P2. When the time limit period has elapsed, the motor pumps P1 or P2 are controlled so as to be in a stopped state without fail (described later in S530 to S550 of FIG. 7). Here, even if the second type motor pump P1 or P2 is stopped, the control device 100 continues to drive the motor as long as the first type motor pump Px capable of continuous aerial operation for a limited period or more is in operation. Operation control is performed so that the operation of the pump Px is continued. Thereby, the drainage of the liquid can be effectively controlled so that the liquid does not remain in the water tank 20 for a long time. In addition, the amount of putrefaction of the liquid in the water tank 20 can be reduced as much as possible, and the generation of foul odor can be suppressed.

As described above, after the second type motor pump P1 or P2 is temporarily stopped, a restart prohibition period is provided between the time when the stopped second type motor pump P1 or P2 is restarted, and the pump command unit is provided. The 146 also controls its operation. Specifically, the timer unit 144 measures the period during which the second type motor pumps P1 or P2 are operated in the air. The period is associated with the suspension period as a restart prohibition period. As an example, a period proportional to the immediately preceding aerial operation period may be a re-operation prohibition period, or a period obtained by adding a certain period to the immediately preceding aerial operation period may be a re-operation prohibition period. The pump command unit 146 can operate only the first type motor pump Px or the second type motor pump that is not in the re-operation prohibition period during the re-operation prohibition period of the second type motor pump P1 or P2. Control. In this way, by providing a restart prohibition period for cooling the motor unit 4 after the second type motor pump P1 or P2 has been continuously operated in the air, the second type motor pump P1 or the second type motor pump P1 or P2 has been continuously operated in the air. It is possible to prevent P2 from becoming hot during restarting and failing. In addition, the first type and other second type motor pumps other than the motor pump during the restart period minimize the amount of putrefaction of the liquid in the water tank by continuing drainage while making it operable, and generate a foul odor. Can be suppressed. Further, by effectively utilizing the first type and second type motor pumps, it is possible to prevent a failure due to overheating of the motor unit 4 of the second type motor pump P1 or P2.

The storage unit 160 is limited to, but is not limited to, a volatile memory (for example, RAM (Random Access)).
Memory), etc.), non-volatile memory (eg, ROM (Read Only Memory), flash memory, etc.) or any combination of memories. The storage unit 160 stores various setting information, control information, various history information, and the like for controlling the pump equipment 10. As an example of the history information stored in the storage unit 160, the operation state management table 164 shown in FIG. 3 stores the previously operated operation history of each of the motor pumps P1, P2 and Px, and manages the motor pumps. I do. That is, when the pump command unit 146 causes each of the motor pumps P1, P2 and Px to operate "1" or stop "0", or when the pump state detection unit 124 determines the operating status (for example, operation "1", stop "0", Alternatively, when a failure "-1") is detected, a record may be added along with its date and time (YYYYMMDD-hhmmss). The configuration of the table is not limited to FIG. 3, and any configuration can be used. As an alternative, for example, a table for managing the operating status may be provided for each of the motor pumps P1, P2 and Px, and a table for managing the water level status, a failure history, etc. may be separately provided in addition to the operating status management table 164. May be good.

As shown in FIG. 4, the control device 100 operates so as to make a transition between the two states according to the operating status of the motor pumps P1, P2 and Px of the pump equipment 10. The two states are, for example, a "total pump stop state" in which all of the motor pumps P1, P2 and Px are stopped, and one or more of the motor pumps P1, P2 and Px are in operation. It is the "pump operating state". Specifically, when all the motor pumps P1, P2 and Px are in the "all pumps stopped state" and the water level of the liquid in the water tank 20 reaches a predetermined starting water level (FH1) or higher, the control device 100 , Any of the predetermined motor pumps P1, P2 and Px is started to shift the pump equipment 10 to the "pump operation state". On the other hand, when the pump equipment 10 is in the "pump operating state", the control device 100 continuously operates the predetermined motor pumps P1, P2 and Px according to the water level of the liquid in the water tank 20, or the water level is further increased. When it rises, motor pumps P1, P2 and Px are added. Further, when the pump equipment 10 is in the "pump operating state", the control device 100 disengages the operating motor pumps P1, P2 and Px according to the water level of the liquid in the water tank 20, and finally. When all the motor pumps P1, P2 and Px in the pump equipment 10 are stopped, the state is changed to the "all pumps stopped state".

Next, the operations of the motor pumps P1, P2 and Px according to the present embodiment will be described with reference to the control flows shown in FIGS. 5 to 8. The control device 100 controls the operations of the motor pumps P1, P2 and Px according to the control flow shown in FIGS. 5 to 8.

First, when a power source is applied to the control device 100, the entire control flow S100 shown in FIG. 5 is started. Alternatively, S100 may be started in response to an instruction from the setting unit 162. In response to the start of the control flow S100, in S110, the operating state of each of the motor pumps P1, P2 and Px is confirmed whether they are in operation or stopped. The operating state of each motor pump may be confirmed with reference to the operating state management table 164, or the operating state of each of the motor pumps P1, P2 and Px may be confirmed by the pump state detection unit 124. Alternatively, the operating state of the motor pumps P1, P2 and Px may be set by the immediately preceding command to the motor pumps P1, P2 and Px by the pump command unit 146. (Hereafter, for the sake of simplicity, three motor pumps P1, P2 and Px are arranged in the water tank 20, and various water levels 40 (float: 40a, 40b) for controlling the respective motor pumps P1, P2 and Px are arranged. , 40c and 40n) have a common height.)

Next, the water level WL in the water tank 20 is detected (S120). When the water level is below the pump stop water level FL (S130: Yes) and any of the motor pumps P1, P2 and Px is in operation, all the operating motor pumps P1, P2 and Px are stopped (S140). ). This makes it possible to prevent the motor pumps P1, P2 and Px from sucking air during operation. After that, the judgment proceeds to S150. When S130 is No, the operating motor pumps P1, P2, and Px continue to operate, and the stopped motor pumps P1, P2, and Px continue to stop, and the determination proceeds to S150.

Next, in S150, it is determined whether the motor pumps P1, P2 and Px are all "stop pumps" (that is, "0") (S150: Yes). If it is determined that all the pumps are "stopped pumps" and "all pumps are stopped" (S150: Yes), the process proceeds to the pump stopped flow of S300, and the motor pumps P1, P2 and Px are on standby for operation. It becomes a state. On the other hand, in S150, when any one of the motor pumps P1, P2 or Px is determined to be the "operating pump" (motor pump in operation) and is determined to be in the "pump operating state" (S150: No), the pump in S500. Proceed to the flow during operation.

Here, after the processing of S300 and S500 is completed, the control flow returns to S100. Then, the pump operating state is repeatedly confirmed, and the state transitions between the "all pump stopped state" and the "pump operating state" as appropriate. The control flow S100 may be terminated by an arbitrary trigger set in the setting unit 162 of the control device. For example, the pump equipment 10 has an "automatic mode" in which the motor pumps P1, P2 and Px are started and stopped according to the water level in the control flow S100, and a "test" in which the motor pumps P1, P2 and Px are operated on a trial basis according to an operator's instruction. Various modes such as "mode" and "stop mode" for forcibly stopping each motor pump P1, P2 and Px may be possessed. In that case, by shifting from the "automatic mode" to the "test mode" or "stop mode", the control flow S100 ends, and the shift from the "test mode" or "stop mode" to the "automatic mode" is performed. Therefore, the control flow S100 may be started.

With reference to FIG. 6, the pump stopped flow S300 when the pump equipment 10 is in the “all pump stopped state” will be described. Proceeding to S300 in S100 described above, first, it is determined (S310) whether the water level WL is equal to or higher than the pump starting water level FH1. The pump exposed water level FP may be used as an alternative to the pump starting water level FH1. When the water level WL is the pump starting water level FH1 or higher (S310: Yes), any of the motor pumps P1, P2 or Px is started to start draining the liquid stored in the water tank 20. In S320, the pump command unit 146 determines the starting pump to be operated first, and the operation of the starting pump is started. At the same time, a record to that effect may be added to the operation status management table 164 together with the current date and time.

Here, the starting pump to be started in S320 will be described. The starting pump is determined based on the operation history stored in the storage unit 160. Specifically, the starting pump rotates from the previous starting pump. If the previous starting pump is the motor pump P1, the current starting pump is P2, if the previous starting pump is the motor pump P2, the current starting pump is Px, and if the previous starting pump is the motor pump Px, this starting pump May be rotated in the order of pump numbers (or the order of arrangement), such as P1. Further, the integrated operation period for each of the motor pumps P1, P2 and Px may be compared, and the motor pumps P1, P2 and Px having a short integrated operation period may be used as the starting pumps, or the motor pumps P1 and P2 having a small number of integrated operations. And Px may be the starting pump. Further, the pump having the longest pump stop period may be used as the starting pump. Here, the number of motor pumps P1, P2 and Px is three, but it is preferable to rotate the starting pump in the same manner even if the number of motor pumps P1, P2 and Px in the pump equipment 10 increases or decreases. If any of the motor pumps P1, P2, or Px is out of order or cannot be operated during the restart period, the starting machine may be rotated again to start the startable pump. By realizing the rotation of the starting pump, the motor pumps P1, P2 and Px to be operated can be effectively selected, and by equalizing the pump operation period and the number of starts and stops, a specific in the drainage facility 10 can be selected. It is possible to prevent the motor pumps P1, P2 and Px from reaching the replacement life.

If the pump start water level FH1 is not detected in S310 (S310: No), then the water level WL is the water level equal to or higher than the pump stop water level FL and lower than the pump start water level FH1, and in addition, the water level state measured by the timer unit 142. (S330) is determined whether or not a certain period of time has passed. When the pump exposed water level FP is adopted as a substitute for the pump starting water level FH1, it is determined whether the period of the water level state in which the water level WL is equal to or higher than the pump stop water level FL and lower than the pump exposed water level FP has elapsed for a certain period or longer. When S330 is Yes, the first type motor pump Px is operated (S340) by the pump command unit 146. That is, in S340, the pump command unit 146 determines the starting pump to be the first type motor pump Px, and the operation of the starting pump is started. At the same time, a record may be added to the operation status management table 164 together with the current date and time. If No in S330, the start condition of the motor pump Px in the pump equipment 10 is not satisfied, so that the "all pumps stopped state" is maintained as it is. Here, in the case of starting the first type motor pump Px with Yes in S330, if there are a plurality of first type motor pumps, the plurality of first type motor pumps of the above-mentioned advance machine are used. Rotation may be performed.

The operations of S330 and S340 are intended to prevent the liquid in the water tank 20 from staying for a long period of time even when the water level WL does not meet the pump starting water level FH1, and the control device 100 , The first type motor pump Px that can be continuously operated in the air for a limited period or more and has no restart prohibition period is started. In this way, even when the water level does not rise to the pump starting water level, it is possible to prevent the liquid from staying in the water tank 20 for a long time by continuously operating in the air with the first type motor pump Px. .. In particular, when the liquid is sewage, the generation of foul odors and toxic gas can be prevented by operating the motor pump Px to create a water flow.

The fixed period in S330 may be a unique period depending on the pump equipment 10. Specifically, if the transport liquid is sewage, it may be several minutes or hours, or if it is rainwater, it may be relatively long, such as several hours, days, or months. Further, for a certain period of time in S330, the user may change the setting from the setting unit 162 so that the setting can be adjusted for each site. After the processing in S300 described above is completed (S350), the control flow returns to S100.

With reference to FIG. 7, a pump operating flow (S500) when it is determined that there is a pump in operation (S150: No) in S150 of FIG. 5 will be described. First, in S510, it is determined whether the water level WL is lower than the full water level FHn (S510: Yes). When S510 is Yes, it is further determined in S520 whether the water level WL is lower than the pump exposed water level FP (S520: Yes).

When S520 is Yes, in S530, the timer unit 142 determines whether T1 or more has elapsed (Yes) for a certain period of time in a state where the water level WL is lower than the pump exposed water level FP. When S530 is Yes, then in S540, the control device 100 determines whether the second type motor pumps P1 and / or P2 are operating (S540: Yes). Here, the fixed period T1 is preferably set to be equal to or less than the above-mentioned limited period defined for the second type motor pump. When S540 is Yes, in S550, if the second type motor pump is continuously operated in the air for a certain period of time T1 or more, it may lead to a failure. Therefore, the pump command unit 146 uses the second type motor pump during operation. If there is a first-class motor pump Px that is in operation, the operation is continued.

Here, the motor pumps P1 and / or P2 stopped in S550 enter the above-mentioned restart prohibition period. During the re-operation prohibition period of the motor pumps P1 and / or P2, only the first type motor pump Px or the second type motor pump P1 or P2 not during the re-operation prohibition period is controlled so as to be operable. In the control device 100 according to the present embodiment, the motor unit of the second type motor pump P1 or P2 is controlled by controlling the second type motor pump P1 or P2 so as not to be inappropriately continuously operated in the air. Failure due to overheating of 4 can be prevented. Further, the first type motor pump Px capable of continuous aerial operation while the second type motor pumps P1 and P2 are in the restart prohibition period, or the second type motor pump P1 or P2 not in the restart prohibition period. Therefore, the drainage of the liquid is effectively controlled so that the liquid does not remain in the water tank 20 for a long time. As a result, the amount of putrefaction of the liquid in the water tank 20 can be reduced as much as possible, and the generation of foul odor can be suppressed.

When S510 is No, it is determined that the water level in the water tank 20 is rising, and it is determined whether there are additional motor pumps P1, P2 or Px (S560). As an example of the judgment that the addition is possible, it can be judged based on the conditions such as whether the pump is out of order, the restart prohibition period is not in progress, and the number of pumps that can be operated in parallel is less than or equal to the number of pumps. When S560 is Yes, in S570, the pump command unit 146 activates a stopped additional motor pump. At the same time, in S570, a record to that effect may be added to the operation status management table 164 together with the current date and time. Further, when the water level WL is higher than the full water level FHn, it may be determined that the water level is abnormally increased, and all the startable motor pumps P1, P2 and Px may be started at the same time to be operated in parallel.

Here, in S570, it is preferable to sequentially add the motor pumps according to the rotation order (P1 → P2 → Px → P1). Further, since the water level WL is higher than the exposed water level FP, the second type motor pump P1 or P2 may be added preferentially. However, when the second type motor pump P1 or P2 is to be operated again, it is necessary that the restart prohibition period is not in progress. If any of the motor pumps P1, P2, or Px to be added cannot be operated due to a failure, the rotation may be performed again. By effectively selecting the motor pumps P1, P2 or Px to be added in consideration of these conditions, it is possible to equalize the pump operation period and the number of starts and stops, and a specific motor pump P1 in the pump equipment 10 can be achieved. , P2 or Px can be prevented from reaching the replacement life. Furthermore, by performing rotation, it is possible to eliminate a start failure of the motor pumps P1, P2 or Px such as a rust lock of the pump due to a long stop period of the specific motor pumps P1, P2 or Px. ..

Further, when S560 is No, it is determined that the motor pumps P1, P2 and Px that can be added do not exist, the process returns to S100 in S580, and the operation is continued by the motor pumps P1, P2 and Px currently in operation.

Here, the process returns to S520, and if S520 is No, the process proceeds to S600 in FIG. In S600, the pump command unit 146 eventually rotates the operating pump. In S620, it is determined whether the first type motor pump Px has been in operation for a certain period of time of TPx or more, and the second type motor pump can be added. When S620 is Yes, in S640, the motor pump Px is stopped by the pump command unit 146. At this time, a record to that effect may be added to the operation status management table 164 together with the current date and time. In the pump equipment 10 that preferentially operates the first type motor pump when the water level in the water tank 20 is lower than the pump exposed water level FP, the first type motor pump has a longer operating period than the second type motor pump. And there is a concern that the number of operations will increase extremely. In the rotation here, when the water level in the water tank 20 is higher than the pump exposed water level FP, the second type motor pump P1 or P2 is preferentially started, and the first type motor pump and the second type motor are started. The purpose is to equalize the operating period and the number of operations of the pump. Therefore, if the motor pump Px is temporarily stopped in S640 and the drainage is not in time and the water level in the water tank 20 rises, the corresponding second type motor pump P1 or in any of S320, S570, or S340 is used. P2 will be started. As a result, the rotation of the operating pump is realized, and the second type motor pump can be started when the water level of the water tank 20 is equal to or higher than the exposed water level FP.

Here, when any of the motor pumps P1, P2 or Px in the pump equipment 10 is in operation, the pump command unit 146 periodically rotates the operation pump by the motor pumps P1, P2 and / or Px (for example). , The continuous operation period for each motor pump may be carried out every 24 hours, every week, etc.). The rotation of the operation pump is based on the operation history of the operation state management table 164 stored in the storage unit 160 of the control device at the same time as or immediately before stopping each of the motor pumps P1, P2 and / or Px during operation. It is preferable to start the motor pumps P1, P2 and / or Px determined in the above. Specifically, the pump command unit 146 alternately operates any one or more of the motor pumps P1, P2 and / or Px while sequentially switching the motor pumps P1, P2 and / or Px to be operated at regular intervals. , A record is added to the operation status management table 164 each time. The purpose of the rotation of the pump operation is to suppress the deviation of the operation period and the stop period of each of the motor pumps P1, P2 and Px, and the operation frequency, and to make the operation state uniform. The mode of rotation is not limited to this, but any of the following methods is preferable. That is, (i) the motor pumps to be operated are rotated in the order of arrangement (specifically, they are operated in the order of P1 → P2 → Px → P1 ...), (Ii) the timer unit 144 and the operation state management table 164. Is used to specify the operating period of each motor pump, and the motor pumps P1, P2 and / or Px are rotated in ascending order of operating period, or (iii) each motor is used by using the timer unit 144 or the operating state management table 164. The stop periods of the pumps P1, P2 and Px are specified, and the motor pumps P1, P2 and / or Px are started and rotated in the order of the longest stop period. By realizing the rotation operation between the motor pumps P1, P2 and Px, the motor pumps P1, P2 and / or Px to be operated can be effectively selected, and the pump operation period and the number of starts and stops can be equalized. Thereby, it is possible to prevent the specific motor pumps P1, P2 and / or Px in the pump equipment 10 from reaching the replacement life. Further, when starting the motor pumps P1 or P2, the motor pumps P1 or P2 are made to stand by so that the current stop period is longer than the restart prohibition period.

After the implementation of S500 in FIG. 7, the process returns to S100 (S580). As described above, S100 determines which of the motor pumps P1, P2 and Px is in operation, shifts to S300 if all pumps are stopped, and shifts to S500 if there is a pump in operation. The operation of migrating is repeated.

(Modified example of pump equipment operation)
9A and 9B are modified examples of the operation of the pump equipment 10 according to the above-described embodiment. In the control flow S100 described above, when the water level in the water tank 20 further rises while any of the motor pumps P1, P2 and Px is in operation, any of the motor pumps P1, P2 and Px that can be further added is added. to add. In this way, after starting with a plurality of motor pumps P1, P2 and Px, the number of additional motor pumps P1, P2 and / or Px in operation is increased until the water level of the water tank 20 drops and the stop water level FL is reached. maintain. This is to quickly drain the sewage that has risen above the additional water level. In particular, in the pump equipment 10 that handles sewage, if the sewage overflows to the outside of the water tank 20, secondary damage increases, so that it is required to drain the sewage immediately. However, if the pump equipment 10 is a pump equipment that handles rainwater, medium water, river water, tap water, etc., if the water level of the water tank 20 drops to some extent after adding the motor pumps P1, P2 and / or Px, an appropriate pump is used. There is also a request to disassemble until the number of units is reached and perform energy-saving operation. In FIGS. 9A and 9B, a method of arranging the motor pumps P1, P2 and / or Px once added in this way will be described.

In FIG. 9A, three motor pumps (P1, P2 and Px) are prepared, and one of them (Px) is used as the first type motor pump. P1 and P2 are second type motor pumps. Further, four water levels of pump stop water level FL, pump exposed water level FP, pump start water level FH1, and full water level FHn are detected. In this example, it is assumed that the pump exposed water level FP is common to the motor pumps P1, P2 and Px. In FIG. 9B, four motor pumps (P1, P2, P3 and Px) are prepared, and one of them is referred to as a first type motor pump (Px). P1, P2 and P3 are second type motor pumps. Further, five water levels of pump stop water level FL, pump exposed water level FP, pump start water level FH1, pump additional water level FH2, and full water level FHn are detected. The same applies to the case where five or more motor pumps are installed, but as a modification, a plurality of first type motor pumps (Px) may be installed. In the following, the water level WL is at a position equal to or higher than the full water level FHn, and all the motor pumps P1, P2, P3, P4 and Px are operated in the above-mentioned S525, and then the motor pumps P1, P2, P3 and Px are operated. It is assumed that the water level WL gradually drops due to operation.

In FIG. 9A, since the water level WL is initially equal to or higher than the full water level FHn, all P1, P2, and Px are operated in parallel (S10). When the water level WL drops to the full water level FHn or less, Px is first disconnected (stopped), and when the water level WL is the pump starting water level FH1 or more, both P1 and P2 are operated in parallel (S11). Further, when the pump starting water level drops below FH1, either P1 or P2 is disconnected, and the number of operating motor pumps becomes either one of P1 or P2 (S12). When the vehicle is operated for a long time in the state of S12 (for example, an arbitrary period of several hours to several days), rotation is performed between the motor pumps of P1 and P2. That is, by the rotation of the operation pump described above, the pump command unit 146 determines the motor pump to be started from the plurality of second-type motor pumps P1 and P2. As a result, the operating frequency, operating period, and / or stopping period of the motor pumps P1 and P2 can be made uniform, and the frequency of failure of the specific motor pumps P1 and / or P2 can be reduced. Further, when the water level in the water tank 20 decreases, the water level WL drops to the pump exposed water level FP or less, and a certain period of time or more elapses, P1 or P2 during operation is stopped. If the water level WL does not rise above the pump starting water level FH1 in this state, Px is forcibly operated in S340 of the above-mentioned control flow (S13). Further, when the water level WL finally drops below the pump stop water level FL, the first type motor pump Px is also stopped, and the state transitions to the "all pump stop state".

FIG. 9B is almost the same, but with the addition of the motor pump P3 and the pump additional water level FH2 as compared with FIG. 9A, the rotation of the second type motor pumps P1, P2 and P3 can be made various. it can. That is, when the water level WL drops to the pump additional water level FH2, rotation is performed using the second type motor pumps P1, P2, and / or P3 (S22). In particular, when the pump starting water level is FH1 or higher, any two combinations of the second type motor pumps P1, P2 and P3 (P1 and P2, P2 and P3, or a combination of P3 and P1) are used. It is better to carry out rotation. When the water level WL is lower than the pump starting water level FH1, it is preferable to perform rotation to select one of the second type motor pumps P1, P2 and P3. As described above, in the pump equipment 10 according to the present embodiment, it is preferable to determine the number of water levels to be detected (that is, the number of floats to be installed) according to the number of installed motor pumps. In this regard, the number of motor pumps to be operated may be determined by a plurality of set pump starting water levels. The number of water levels to be detected may be determined according to the number of motor pumps of the first type and the number of motor pumps of the second type. As a result, the control of liquid drainage can be set more flexibly.

In addition, in FIG. 9A and FIG. 9B, when shifting to each step (for example, S10 to S11, S11 to S12, etc.), the timer unit 144 may monitor the elapsed period for each step. In that case, threshold values for the elapsed period may be provided for each step, and these threshold values may be stored in the storage unit 160 as fixed values, or may be changed by the setting unit 162 and stored in the storage unit 160. .. Further, the first type motor pump can perform continuous aerial operation for a longer period of time than the second type motor pump. Therefore, when the water level WL is equal to or higher than the pump exposed water level FP, the operation period, the stop period, and the number of operations of each motor pump can be leveled by preferentially disconnecting the first type motor pumps.

(Application of pump equipment to odor prevention type drainage equipment)
From this, an application example in which the pump equipment 10 according to the above-described embodiment is applied to the malodor prevention type drainage equipment will be described with reference to FIGS. 10 to 12. In the malodor prevention type drainage facility according to the present embodiment, the basement portion B of the building 1000 is located below the public sewer pipe 80, and sewage and miscellaneous drainage generated in the basement portion B (hereinafter referred to as "sewage, etc." ) Is temporarily stored in the sewage tank 20-1 provided in the pit Pi, which is a drainage tank installed further below via the inflow pipe 12. After that, the sewage and the like are pumped up to the sewage basin 91 by the motor pumps P1 and Px, and drained to the public sewer pipe 80 via the sewage basin 93. In addition, sewage or the like generated on the first floor or higher of the building 1000 may be drained directly to the sewage basin 91 under natural flow.

In Application Example 1 of FIG. 10, a sewage tank 20-1 is provided in the pit Pi by a plurality of panel members formed of resin or the like, and a plurality of motor pumps P1 and Px are installed inside the sewage tank 20-1. .. In Application Example 2 of FIG. 11, in addition to installing the motor pump P1 inside the sewage tank 20-2 provided in the pit Pi, a plurality of motor pumps Px are installed outside the sewage tank. In Application Example 3 of FIG. 12, tubular water tanks (barrel Brl-N, barrel Brl-N-1, barrel Brl-2 and barrel Brl-1) are arranged inside the pit Pi so as to communicate with each other, and inside the barrel. A plurality of motor pumps P1 and Px are installed in the vehicle. Further, the height is adjusted so that the height of the bottom of each barrel becomes lower toward the downstream direction, and the motor pump Px is arranged in the most downstream barrel to guide sewage and the like. In the malodor prevention type drainage facilities 1500 to 1700 according to the present embodiment, it is preferable that the above-mentioned control device 100 is arranged in the upper floor B of the pit Pi so that it can be operated by the operator. In Application Examples 1 to 3, two motor pumps (P1 and Px) are shown, but the present invention is not limited to this, and three or more motor pumps may be used. Such malodor prevention type drainage facilities 1500 to 1700 are a mixture of the first type motor pump Px and the second type motor pump P1, and sewage in the sewage tanks 20-1 and 20-2 and the pit Pi. It is possible to realize efficient drainage of sewage, etc., without leaving such substances for a long time. As a result, the amount of putrefaction of the liquid in the water tank can be reduced as much as possible, and the generation of foul odor can be suppressed.

(Application example 1)
The malodor prevention type drainage facility 1500 shown in FIG. 10 includes a sewage tank 20-1 provided in the pit Pi and a plurality of motor pumps P1 and Px installed in the sewage tank 20-1. A pit opening (for example, a manhole) 15 is formed in the pit Pi, and a pit opening lid 16 (for example, a manhole cover) is attached to the pit opening 15. The plurality of motor pumps include a first-type motor pump Px and a second-type motor pump P1 included in the pump equipment 10. The sewage tank 20-1 of Application Example 1 corresponds to, for example, the water tank 20 shown in FIG. 1A.

The sewage tank 20-1 is formed by connecting a plurality of panel members. It has a substantially rectangular parallelepiped shape (box shape) as a whole, and has an internal space defined by a bottom surface 20-1a, a side surface 20-1b, and a top surface 20-1c. In the example of FIG. 10, the alternate long and short dash line indicates the division of a plurality of panel members in the sewage tank 20-1. The sewage tank 20-1 may be formed of an arbitrary number of panel members. The plurality of panel members are formed of, for example, resin or metal. Further, the panel member may be formed of a plurality of layers of materials, and may be formed by laminating, for example, a fiber reinforced plastic (FRP), a synthetic resin foam, a synthetic resin exterior, or the like.

In the sewage tank 20-1, an opening 13 is formed on the upper surface 20-1c, and the opening 13 is covered with a lid 14. The opening 13 is formed above the motor pump and has a size that allows the motor pump to pass through. Specifically, two motor pumps P1 and Px may be installed in the sewage tank 20-1, and an opening 13 and a lid 14 may be provided corresponding to the positions of the respective motor pumps. Then, for example, by moving the motor pump P1 or Px in the vertical direction using a hanging tool, the motor pump P1 or Px can be installed in the sewage tank 20-1 or taken out from the sewage tank 20-1. Can be done. That is, the motor pump P1 or Px can be replaced and maintained without draining the sewage from the sewage tank 20-1. The inflow pipe 12 is piped from the basement portion B through the pit opening 15 and through the opening 13 of the sewage tank 20-1 into the sewage tank 20-1. In the sewage tank 20-1, the outflow pipe 21 is connected to each of the discharge ports of the two motor pumps P1 and Px, and is integrated outside the sewage tank 20-1 and in the pit Pi and connected to the sewage sewage 91 side. Will be done.

(Application example 2)
The malodor prevention type drainage facility 1600 shown in FIG. 11 includes a sewage tank 20-2 provided in the pit Pi, a second type motor pump P1 installed in the sewage tank 20-2, and a sewage tank 20-. 2 Provided is a first-class motor pump Px provided outside and connected to the outlet 11 of the sewage tank 20-2 through a pipe 23. The sewage tank 20-2 of Application Example 2 corresponds to, for example, the water tank 20 shown in FIG. 1A. The sewage tank 20-2 has an opening 13 formed on the upper surface thereof, and the opening 13 is covered with a lid 14. The inflow pipe 12 is piped from the basement portion B through the pit opening 15 and through the opening 13 of the sewage tank 20-2 into the sewage tank 20-2. Sewage and the like flow into the sewage tank 20-2 through the inflow pipe 12. A recess is provided on the bottom surface of the sewage tank 20-2, and sewage or the like is guided to the recess. An outflow port 11 may be provided near the bottom surface of the side surface of the recess, and sewage or the like may flow out to the suction pipe 23 outside the sewage tank 20-2 through the outflow port 11. In order to prevent the motor pump Px from sucking air during operation, the height of the lower end of the suction pipe 23 may be designed to be equal to or lower than the height of the lower end of the outlet 11.

An outflow pipe 21 is connected to each of the discharge ports of the two motor pumps P1 and Px. The outflow pipe 21 is integrated and penetrates the lid 16 of the pit Pi and is connected to the sewage basin 91. In this way, the sewage and the like that have flowed into the sewage tank 20-2 are not only drained from the motor pump P1 installed in the sewage tank 20-2, but also the motor pump provided outside the sewage tank 20-2. It is also effectively drained by Px. The motor pump Px provided outside the sewage tank 20-2 may be a first-class motor pump. That is, when the motor pump Px is constantly continuously operated in the air outside the sewage tank 20-2, and the sewage tank 20-2 is abnormally increased in water, so that sewage or the like is flooded from the sewage tank 20-2. However, if it is a first-class motor pump Px that can be operated as a submersible pump, it can be operated without any problem.

As described above, the malodor prevention type drainage facility 1600 is operated more frequently than the second type motor pump P1 by providing the first type motor pump Px outside the sewage tank 20-2, and has a complicated structure. There is an advantage that maintenance of one type of motor pump Px can be easily performed outside the sewage tank 20-2. If the water level in the sewage tank 20-2 is equal to or higher than the pump exposed water level FP, the pump can be operated while cooling the motor unit 4 of the second type motor pump P1 with the sewage or the like in the sewage tank 20-2. Therefore, it is possible to realize the malodor prevention type drainage facility 1600 capable of effectively operating the second type motor pump. As a result, the amount of putrefaction of sewage and the like in the sewage tank 20-2 can be reduced as much as possible, and the generation of foul odor can be suppressed. In such a malodor prevention type drainage facility 1600, as described above, when the water level in the sewage tank 20-2 is lower than the pump exposed water level FP for a predetermined period of time, the second type motor pump P1 should be in a stopped state. Then, while the second type motor pump P1 is stopped, the first type motor pump Px capable of continuous aerial operation is operated so that the liquid does not remain in the sewage tank 20-2 for a long time. Is good. By effectively controlling the drainage of the liquid in this way, the amount of putrefaction of the liquid in the sewage tank 20-2 can be reduced as much as possible, and the generation of foul odor can be suppressed.

(Application example 3)
The malodor prevention type drainage facility 1700 shown in FIG. 12 is provided in the pit Pi and is housed in a plurality of barrels Brl-1 to Brl-N for temporarily storing sewage and the like from the basement portion B. It includes a plurality of motor pumps P1 and Px. In Application Example 3, each of the plurality of connected barrels (Brl-1, Brl-2, Brl-N-1 and Brl-N) corresponds to, for example, the water tank 20 shown in FIG. 1A. Barrels Brl-1 to Brl-N are connected by communication pipes 30-1 and 30-N-1. In order to drain the sewage and the like stored in the barrel Br-1 to the outside, the first type motor pump Px is installed inside the barrel. Further, in order to drain the sewage and the like stored in the barrel Brl-2 to the outside, a second type motor pump P1 is installed. Motor pumps may be similarly installed in barrels other than these. Further, a plurality of motor pumps may be arranged in one barrel. A water level detector 40 is installed in each of the barrels Brl-1 and Brl-2 in which the motor pumps Px and P1 are installed, and detects the water level inside the barrels, respectively. Further, the water level detector 40 may be installed in any one of the barrels Brl-1 to Brl-N to detect the water level inside the barrel. It is preferable that the first type motor pump Px is installed in the most downstream barrel (Brl-1 in FIG. 12) among the plurality of barrels.

The inflow pipe 12 is piped from the basement portion B to the inside of the pit Pi through the pit opening 15a. Sewage and the like are first piped so as to flow into the barrel Brl-N. The sewage and the like that have flowed into the barrel Brl-N sequentially flow out to the barrel in the downstream direction. The sewage in the barrels Brl-1 and Brl-2 is drained from the barrels Brl-1 and Brl-2 by the outflow pipe 21 connected to the discharge port of the motor pumps Px and P1, and is drained through the pit opening 15b. It is drained to 91. Although the pit openings 15a and 15b are provided separately in FIG. 12, the number of pit openings may be one or three or more.

By placing the barrels Brl-2 to Brl-N on a table, the height of the bottom surface of the barrel Brl-1 may be adjusted to be lower than that of the other barrels. Thereby, sewage and the like can be effectively guided to the barrel Brl-1. It is advisable to adjust the height of the bottom surface of the barrel so that it becomes lower toward the downstream side. In this application example, the first type motor pump Px is installed on the bottom surface of the barrel Brl-1 in which the bottom surface of the barrel is arranged at the lowest position for continuous aerial operation, and the bottom surface of the barrel Brl-2 is the first type. Two types of motor pump P1 are installed. Further, the first type or the second type motor pump may be additionally installed in the other barrel.

Further, in the application example of FIG. 12, the first type motor pump Px may be installed outside the barrel Brl-1. Specifically, an outlet (not shown) is provided on the bottom surface of the barrel Brl-1 including the bottom surface S, and the inlet of the first type motor pump Px installed inside the pit Pi and outside the barrel Brl-1. And connect with piping. In that case, the second type motor pump P1 may be installed in the barrel Brl-1.

The operation of the motor pump described with respect to the pump equipment 10 according to the present embodiment can be applied to the malodor prevention type drainage equipments 1500, 1600 and 1700 provided in the basement of the building 1000. That is, the control device 100 is also applied to the malodor prevention type drainage facilities 1500, 1600 and 1700, and the control of the motor pumps P1, P2 and Px described with reference to FIGS. 5, 6, 7 and 8 is realized. Thereby, the same effect as described with respect to the pump equipment 10 can be obtained. Further, in the malodor prevention type drainage facilities 1500, 1600 and 1700, the number of motor pumps may be three or more, one type 1 motor pump may be used, and the remaining motor pumps may be used as the second type motor pump. With this configuration, it is possible to realize an odor-preventing drainage facility that can drain water effectively at low cost. However, a plurality of first type motor pumps may be used.

Further, the pump facility 10 according to the present embodiment can be applied to a wide range of drainage facilities for storing and draining various liquids such as fresh water, reclaimed water, rainwater and sewage. Further, the pump equipment 10 according to the present embodiment can be applied not only to the malodor prevention type drainage equipments 1500, 1600 and 1700 provided in the basement of the building, but also to various pump equipments provided on the ground. The control device 100 for operating the motor pump according to the present embodiment can be used as an operation control device for such various pump equipment and odor prevention type drainage equipment.

Although the embodiments of the present invention have been described above, the above-described embodiments are for facilitating the understanding of the present invention and do not limit the present invention. The present invention can be modified and improved without departing from the spirit thereof, and it goes without saying that the present invention includes an equivalent thereof. In addition, any combination of embodiments and modifications is possible within a range that can solve at least a part of the above-mentioned problems, or a range that produces at least a part of the effect, and is described in the claims and the specification. Any combination of each component or omission is possible.

P1, P2, Px ... Motor pump 2 ... Pump casing part 4 ... Motor part 10, 10a, 10b ... Pump equipment 12 ... Inflow pipe 13 ... Opening 14 ... Lid 15, 15a, 15b ... Pit openings 16, 16a, 16b ... Pit opening lid 20, 20'... Water tank 20b, 20'b ... Bottom surface 20s, 20's ... Side surface 20u, 20'u ... Top surface 20-1, 20-2 ... Sewage tank 20-1a ... Sewage tank 20- Bottom surface 20-1b ... Side surface of sewage tank 20-1 20-1c ... Top surface of sewage tank 20-1 21 ... Outflow pipe 40 ... Water level detector 40a, 40b, 40c, 40n ... Float 41 ... Signal cable 50 ... Power supply Cable 80 ... Public sewer pipe 91, 93 ... Sewage 100 ... Control device 120 ... Detection unit 122 ... Water level detection unit 124 ... Pump status detection unit 140 ... Processing unit 142, 144 ... Timer unit 146 ... Pump command unit 160 ... Storage unit 162 ... Setting unit 164 ... Operating condition management table 1000 ... Building 1500, 1600, 1700 ... Odor prevention type drainage equipment Pi ... Pit B ... Basement part Brl-1, Brl-2, Brl-N-1, Brl-N ... Barrel (Cylindrical water tank)
30-1, 30-N ... Communication pipe 221 ... Impeller 222a ... Suction port 222b ... Discharge port 223 ... Pump bracket 227 ... Lubricating oil 241 ... Main shaft 242 ... Rotor 243 ... Stator 244 ... Motor frame 245 ... Drive power cable 246 ... Bearing 250 ... Cooling fin 260, 270 ... Cooling jacket 251 ... Cooling rod AL ... Axis

Claims (22)

In a pump facility in which multiple motor pumps equipped with motors are arranged to drain the liquid in the water tank.
The plurality of motor pumps include type 1 and type 2 motor pumps.
The first type motor pump enables continuous aerial operation for a certain period of time or longer, and also
The second type of motor pump is a pump facility characterized in that continuous aerial operation for a certain period of time or longer is impossible. In the pump equipment according to claim 1,
A first period, which is shorter than the period during which the second type motor pump enables continuous aerial operation, is defined.
The first type motor pump includes a cooling mechanism that enables continuous aerial operation for the first period or longer.
The second type motor pump does not include a cooling mechanism that enables continuous aerial operation for the first period or longer.
Pump equipment that is characterized by that. The pump equipment according to claim 2, wherein the first type motor pump and the second type motor pump are capable of continuous operation in water. The pump equipment according to claim 2 or 3, wherein the second type motor pump is arranged in the water tank. A water level detector for detecting the water level in the water tank and a control device for controlling the operation of the plurality of motor pumps are further provided.
The water level detector makes it possible to detect the pump exposed water level at which the second type motor pump is exposed in the air.
The control device measures the period during which the water level in the water tank is lower than the pump exposed water level.
Any of claims 2 to 4, wherein the second type motor pump is in a stopped state when the first period elapses when the water level in the water tank is lower than the pump exposed water level. Pump equipment described in. The control device measures the period during which the second type motor pump is continuously operated in the air while the water level is lower than the pump exposed water level as the second period.
The stop period from when the second type motor pump stops continuous aerial operation until the stopped second type motor pump is operated again shall be longer than the second period.
The fifth aspect of the present invention, wherein only the first type motor pump or the second type motor pump other than the stopped second type motor pump can be operated during the stop period. Pump equipment. The control device further includes a storage unit for storing the operation history of the previously operated motor pump.
The water level detector can detect a pump starting water level that is higher than the pump exposed water level.
The control device according to claim 5 or 6, wherein when the pump starting water level is detected, the motor pump determined based on the operation history stored in the storage unit is started. Pump equipment. Equipped with two or more of the second type motor pumps
The pump equipment according to claim 7, wherein the motor pump to be started, which is determined based on the operation history, is selected from the two or more second-type motor pumps. The pump equipment according to claim 7 or 8, wherein the number of the motor pumps to be operated is determined by a plurality of set pump starting water levels. The water level detector can detect the pump stop water level, which is a water level lower than the pump exposed water level.
The control device measures a third period in which all of the plurality of motor pumps are stopped and the pump stop water level is detected but the pump start water level is not detected.
The pump equipment according to any one of claims 7 to 9, wherein the control device operates the motor pump of the first type when the third period is longer than the predetermined fourth period. The pump equipment according to any one of claims 1 to 10, wherein the first type motor pump is arranged at a position lower than that of the second type motor pump. The pump equipment according to any one of claims 2 to 10, wherein the cooling mechanism included in the first type motor pump includes cooling fins provided around the motor. 2. The cooling mechanism included in the first type motor pump includes a cooling jacket provided around the motor, and is configured such that pump pumping water is guided to the cooling jacket. The pump equipment according to any one of 10 to 10. The cooling mechanism provided in the first type motor pump includes a cooling jacket provided around the motor, and is configured such that cooling water is sealed in the cooling jacket. The pump equipment according to 2 to 10. The pump equipment according to any one of claims 2 to 10, wherein the cooling mechanism provided in the first type motor pump is provided with a cooling rod. A motor pump provided in the pump equipment according to any one of claims 1 to 15. A malodor prevention type drainage facility to which the pump facility according to any one of claims 1 to 15 is applied. A control device that controls multiple motor pumps for draining the liquid in the aquarium.
It is possible to receive the water level data in the water tank detected by the water level detector.
The plurality of motor pumps include a first type and a second type motor pump.
The first type motor pump is provided with a cooling mechanism that enables continuous aerial operation for the first period or longer.
The second type motor pump does not have a cooling mechanism that enables continuous aerial operation for the first period or longer.
The control device
It is determined whether or not all of the plurality of motor pumps are in the stopped state, and it is determined.
Based on the water level data, the second period in which the water level in the water tank is lower than the predetermined water level is measured.
It is determined whether the second period is longer than the predetermined third period in the stopped state.
When the stopped state and the second period is longer than the predetermined third period, the first type motor pump is operated.
A control device, characterized in that it operates in such a manner. A control device that controls multiple motor pumps for draining the liquid in the aquarium.
It is possible to receive the water level data in the water tank detected by the water level detector.
The plurality of motor pumps include a first type and a second type motor pump.
The first type motor pump is provided with a cooling mechanism that enables continuous aerial operation for the first period or longer.
The second type motor pump does not have a cooling mechanism that enables continuous aerial operation for the first period or longer.
The control device
Based on the water level data, the second period in which the water level in the water tank is lower than the pump exposed water level at which the second type motor pump is exposed in the air is measured.
A control device, characterized in that, when the second period becomes equal to the first period, the second type motor pump in operation is operated so as to be in a stopped state. While the second type motor pump is stopped, only the first type motor pump or the second type motor pump other than the stopped second type motor pump can be operated. 19. The control device according to claim 19. A sewage tank that is housed in a pit, which is a drainage tank installed at a position lower than the sewer pipe, and temporarily stores the drained liquid.
A first-class motor pump provided outside the sewage tank in the pit and connected to the sewage tank, and
The second type motor pump provided in the sewage tank and
With
The first type motor pump is provided with a cooling mechanism that enables continuous aerial operation for a predetermined period or longer, and the second type motor pump is cooling that enables continuous aerial operation for a predetermined period or longer. A malodor prevention type drainage facility that does not have a mechanism. A water level detector for detecting the water level in the sewage tank, and a control device for controlling the operation of the first type motor pump and the second type motor pump are further provided.
The water level detector can detect the pump exposed water level at which the second type motor pump is exposed in the air.
The control device measures the period during which the water level in the sewage tank is lower than the pump exposed water level.
The malodor prevention according to claim 21, wherein the second type motor pump is in a stopped state when the water level in the sewage tank is lower than the pump exposed water level after the lapse of the predetermined period. Type drainage facility.

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