JP3570861B2 - Submersible pump device with flash valve - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention provides a submersible pump device with a flush valve that is detachably installed in a water tank such as a sewage relay pump tank, for example, including a flash valve that discharges a jet for a certain time at the start of operation to perform aeration and stirring in the water tank. About.
[0002]
[Prior art]
In a submersible pump device installed in a water tank such as the sewage relay pump tank, in order to prevent scum formation due to sedimentation of the earth and sand in the pump tank and inflow of organic components such as fats and oils, a flash valve is provided, By starting the pump, in particular, jetting a jet from the flash valve into the pump tank for a certain period of time, the agitation and aeration effect of this jet can widely prevent sedimentation of soil and scum formation due to inflow of organic components such as oils and fats. Has been done.
[0003]
FIG. 4 shows a conventional general configuration of this type of submersible pump device. A flush valve 3 is attached to a side surface of a pump casing 2 of the submersible pump 1. Accordingly, the fluid flowing in the volute portion in the pump casing 2 of the submersible pump 1 is jetted from the flash valve 3 for a certain period of time, and the flash valve 3 is closed during normal operation.
[0004]
FIGS. 5 to 7 show the internal structure of the flash valve 3. The valve body 10 of the flash valve 3 is provided with a mounting flange 11 for mounting the flash valve 3 on the pump casing 2.
[0005]
A storage portion 13 for storing the spherical ball valve 12 is formed inside the valve body 10, and an internal diaphragm 14 is disposed on the front surface side of the storage portion 13 with the periphery thereof being held in a watertight manner. The ball valve 12 is located on the upper surface of the valve. On the other hand, an oil chamber 16 communicating between the storage section 13 and the internal diaphragm 14 via a control valve 15 is provided on an outer peripheral portion of the valve body 10, and an upper end opening of the oil chamber 16 is provided with an external diaphragm 17. It is covered in watertight.
[0006]
As a result, before the pump is started, as shown in FIG. 5, the ball valve 12 is located in the storage portion 13 and the flash valve 3 is open. When the submersible pump 1 is started in this state, the pump casing 2 The fluid flowing inside passes through the inside of the valve body 10 and squirts into an external water tank. When the fluid flows in the valve main body 10, a negative pressure is generated here, and the external pressure causes the external diaphragm 17 to contract and descend, the internal diaphragm 14 to rise, and the ball valve 12 to be lifted. start.
[0007]
Then, when about 20 to 50 seconds have elapsed from the start of operation, the oil moves from the oil chamber 16 to the space between the internal diaphragm 14 and the storage chamber 13 through the adjustment valve 15, and as shown in FIG. By projecting upward, the ball valve 12 is pushed out toward the jet. As a result, the flush valve 3 is closed, so that the submersible pump 1 stops discharging from the flush valve 3 and pumps water from the discharge port of the pump.
[0008]
When the flash valve 3 is closed in this way, the negative pressure in the valve 3 immediately changes to a positive pressure. As shown in FIG. 7, while maintaining the closed state, the internal diaphragm 14, the external diaphragm 17, and The oil returns to the state before starting the pump.
[0009]
By the above valve operation, a jet is discharged into the water tank through the flash valve 3 only for a certain time when the submersible pump 1 is started, whereby the inside of the water tank is effectively agitated, and the sludge and the sediment are deposited on the bottom of the water tank. Deposition can be prevented and scum formation can be prevented.
[0010]
[Problems to be solved by the invention]
However, if the flush valve is attached to the side surface of the pump casing of the submersible pump as in the above-described conventional example, it is necessary to process the pump casing having a relatively large shape from this side surface, and this processing is considerably difficult. Not only that, the planar size of the entire pump device including the flash valve becomes large. Since the sewage relay pump device is generally installed in a manhole, such a large plane dimension makes it difficult to lift the pump device through the manhole cover during maintenance and inspection.
[0011]
In addition, since the jet is directly discharged from the side of the pump casing when the pump starts, the pressure distribution in the pump casing fluctuates greatly when the flash valve shifts from the open state to the closed state, and the submersible pump responds to the fluctuation of the pressure distribution. There was a problem that it would vibrate.
[0012]
The present invention has been made in view of the above circumstances, and it is possible to reduce the planar dimension of the entire pump device including the flash valve, to mount the flash valve with good workability, and to open and close the flash valve. It is an object of the present invention to provide a submersible pump device with a flush valve, which can suppress pump vibrations caused by the above.
[0013]
[Means for Solving the Problems]
The submersible pump device with a flush valve of the present invention includes a flush valve that discharges a jet for a certain period of time at the start of operation to perform aeration and agitation in the water tank, and is detachable into the water tank via a detachable flange portion that constitutes a detachable device. Wherein the flush valve is mounted on a side surface of a detachable flange portion connected to a discharge side of the submersible pump and constituting the detachable device.
[0014]
As a result, the flush valve is mounted on a detachable flange that is smaller in shape and easier to handle than the pump casing, and the overall dimensions of the pump device including the flash valve are greatly reduced. Workability. In addition, by positioning the opening for the flash valve at a position after passing through the volute of the pump, it is possible to prevent the pressure distribution of the volute of the pump from being partially affected by the discharge of the jet. In addition, vibration generated in the pump during operation can be reduced.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described below with reference to FIGS.
As shown in FIG. 1, in this embodiment, the submersible pump 1 is detachably installed in a sewage relay pump tank (water tank) 20 such as a manhole via an attaching / detaching device 21, and the submersible pump 1 is installed. Then, the submersible pump 1 and the pumping pipe 23 communicate with each other via the elbow pipe 22. Here, an inflow pipe 24 is connected to the sewage relay pump tank 20, a water level sensor 25 and a float switch 26 are disposed inside the pipe, and a control panel 27 is provided outside. .
[0016]
The attaching / detaching device 21 is connected to the attaching / detaching device main body 31 fixed to the upper surface of the base plate 30, a guide rail 32 extending vertically from the upper surface of the main body 31, and the discharge side of the submersible pump 1, as shown in FIG. A hook 34 having a locking portion opened downward is provided on the mounting / dismounting flange 33, and a locking bar 35 for engaging with the hook 34 is provided on the mounting / removing device main body 31. Each is fixed.
[0017]
A chain 41 is attached to the submersible pump 1 via a hanger 40 provided above the motor unit 36. The submersible pump 1 is lowered while being suspended by the chain 41 using the guide rail 32 as a guide. The hook 34 is engaged with the locking rod 35 of the attaching / detaching device 21 to set the submersible pump 1 in a predetermined position, and the chain 41 is pulled up to separate the attaching / detaching flange 33 from the attaching / detaching device main body 31 and guide the submerged pump 33. The submersible pump 1 can be pulled up along the rail 32. Reference numeral 42 denotes a lid that closes an upper end opening of the sewage relay pump tank 20.
[0018]
The flush valve 3 shown in FIGS. 5 to 7 is attached to a side surface of the detachable flange 33, and the flush valve 3 attached to the detachable flange 33 is disposed in the sewage relay pump tank 20 for a certain time when the pump is started. It is configured to discharge a jet.
[0019]
That is, when the submersible pump 1 is started, the flush valve 3 is open (see FIG. 5), and the fluid flowing from the submersible pump 1 through the detachable flange 33 with the start of the submersible pump 1 flows through the inside of the valve 3. It flows and spouts into the sewage relay pump tank 20. When about 20 to 50 seconds have elapsed from the start of operation, the valve 3 is gradually closed and maintained in the closed state (see FIGS. 6 and 7), and the submersible pump 1 stops discharging from the flash valve 3. Then, water is pumped from the discharge port through the water pumping pipe 23.
[0020]
By the above valve operation, a jet is discharged into the sewage relay pump tank 20 through the flash valve 3 for a certain time at the time of starting the pump. It is possible to prevent sludge and sediment accumulation and prevent scum formation.
[0021]
As described above, the pump device including the flash valve 3 is mounted by attaching the flash valve 3 to the detachable flange 31 having a smaller shape and easier handling without performing any processing on the pump casing 2 having a large outer dimension. The overall planar dimensions can be significantly reduced, and processing for mounting the flash valve 3 can be performed easily and with good workability. In addition, the opening of the flash valve 3 is located at a position passing through the volute portion of the submersible pump 1, thereby preventing the pressure distribution of the volute portion of the pump from being partially affected by the discharge of the jet. The vibration generated in the submersible pump 1 during operation can be reduced.
[0022]
Also, when the submersible pump 1 is removed from the attaching / detaching device 21 and the submersible pump 1 is pulled up, the flash valve 3 can be pulled up at the same time, so that the flash valve 3 itself can be easily inspected.
[0023]
In this embodiment, an example in which one submersible pump is provided in the sewage relay pump tank is shown, but a plurality of submersible pumps may be provided, or two submersible pumps may be provided. When a pump is provided, a flush valve may be installed on only one submersible pump, or a flush valve may be installed on both of the two submersible pumps.
[0024]
【The invention's effect】
As described above, according to the present invention, it is possible to reduce the planar shape of the entire pump device including the flash valve, thereby facilitating the installation of the pump device by easily passing through the manhole cover opening and the like. Can be planned. In addition, since the detachable flange is relatively small and has good handling, processing for mounting the flash valve can be performed easily and with good workability.
[0025]
Further, by positioning the opening for the flash valve at a position after passing through the volute portion of the pump, it is possible to prevent the pressure distribution of the volute portion of the pump from being partially affected by the discharge of the jet. In addition, pump vibration generated due to opening and closing of the flash valve can be suppressed to a small value.
[Brief description of the drawings]
FIG. 1 is an overall schematic diagram showing an embodiment of the present invention.
FIG. 2 is an enlarged view of a main part of FIG.
FIG. 3 is a plan view of a submersible pump.
FIG. 4 is a plan view of a conventional submersible pump.
FIG. 5 is a sectional view showing a state immediately after the pump operation of the flash valve is started.
FIG. 6 is a cross-sectional view showing a state in which a ball valve moves from the start of operation.
FIG. 7 is a cross-sectional view showing a state in which the diaphragm returns to a state before the operation is started after the flash valve is closed.
[Explanation of symbols]
1 Submersible pump 3 Flush valve 20 Sewage relay pump tank (water tank)
21 Detachable device 31 Detachable device body 32 Guide rail 33 Detachable flange

Claims (1)

A submersible pump device with a flush valve that is equipped with a flush valve that discharges a jet for a certain period of time at the start of operation to perform aeration and agitation in the water tank, and that is detachably installed in the water tank via a detachable flange part that constitutes a detachable device At
A submersible pump device equipped with a flush valve, wherein the flush valve is attached to a side surface of a detachable flange portion connected to a discharge side of the submersible pump to constitute the detachable device.

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