JP3175438B2 - Pumping station - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pumping station, and more particularly to a facility for a pumping station which is used for rainwater drainage without compromising the functions of the equipment and components of the pumping station. The present invention relates to a space-saving and compact pump station obtained by appropriately changing the installation position of a pump.

[0002]

2. Description of the Related Art As a large capacity pumping station, a drainage pumping station employing a vertical shaft pump is typical. For large-capacity vertical pumps, a two-floor type installation system in which a pump installation floor and a drive equipment / power transmission device floor are separately provided from the viewpoint of ease of assembly and maintenance has conventionally been adopted. In this two-floor type installation method, not only is the civil structure of the building of the pump station complicated, but also the height direction of the building is inevitably increased, and as a result, the construction cost of the pump station is increased.

[0003] In the pumping channel of the large capacity drainage pumping station, a dust removal facility and a sand pit are provided in the suction channel to remove waste (dust) and foreign substances, and the pumped water is guided to the pump through the suction channel.

On the other hand, in the discharge channel of the pump, there are provided a discharge gate for stopping water when the pump operation is stopped, maintenance and inspection of the pump, and a check valve for preventing a backflow when the pump operation is stopped. Provided. The pumping water is discharged to the discharge tank once through the check valve to reduce the pressure pulsation generated in the pump discharge channel, reduce the vibration transmitted to the discharge gutter, and prevent damage to the embankment. A gutter gate is installed at the discharge end side of the discharge gutter to serve as a water stop valve for maintenance and inspection of the check valve.

A conventional apparatus of this type is disclosed in
There is one described in Japanese Patent Application Publication No. 1-55401.

[0006]

According to the above prior art, for example, in a pumping station building, in a two-bed vertical shaft pump, a casing cover forming a discharge flow path of a pump and a drive equipment or a gantry of a power transmission device are arranged in an axial direction. , There is a problem that the length in the axial direction is increased and the height of the machine building is increased.

Further, the discharge channel has a problem that the discharge gate is provided immediately after the discharge of the pump and the check valve and the gutter gate are disposed downstream thereof, so that the discharge channel is lengthened.

An object of the present invention is to obtain a space-saving compact pumping station where the height of the pumping station building is low and the discharge channel of the pumping station is short.

[0009]

In order to achieve the above object, the present invention provides a pump, a driving device for the pump,
A power transmission device installed between a driving facility and the pump,
A pump casing cover which is an upper cover of the pump
Wherein the pump casing comprises:
The cover forms a discharge channel above the pump.
In addition, the power transmission device
It is characterized by the following.

In the pumping station, the pump
The pump casing cover and the pump station
Building of pumping station via discharge channel formed indoors
Connected to the discharge water tank installed in the
Connect to the discharge end via gate and gutter
And the discharge tank is installed on the outdoor wall of the pump station.
A check valve is provided at the end of the discharge channel on the side of the discharge tank.
It is more preferable to provide a configuration.

[0011]

[0012]

The casing cover that forms the discharge channel of the pump and the mount of the drive equipment or the power transmission device are integrated into one, and the casing cover has the function of the mount in addition to the function of the discharge channel. And the height of the gantry can be made shorter than the sum of the height directions, and the axial length of the pump equipment can be shortened. As a result, the height of the plant building can be reduced.

[0013] Furthermore, the discharge channel is shortened by disposing the discharge gate in the vicinity of the downstream of the discharge tank, eliminating the need for a gutter pipe gate, and providing a check valve on the side wall of the building, and making the side wall a wall on one side of the discharge water tank. can do.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a sectional view of a pumping station according to the invention. The equipment configuration of the pump station will be described below.

The pump 1 is driven via a transmission 3 by using a driving unit 2 as power. A casing cover 4 that forms a discharge channel is installed above the pump 1, and the casing cover 4 also serves as a gantry for the transmission. When the pump 1 is operated, pumping flows along the arrow in FIG. Dust removal equipment 6 is installed in the suction channel 5 upstream of the pump, and underwater inspection (garbage)
-After removing foreign matter, the pumped water is guided to the suction side of the pump 1. The water pumped by the pump 1 flows through the casing 7 and the casing cover 4 to the discharge channel 8. Discharge channel 8
Is provided with a backflow prevention valve 9 for the purpose of preventing backflow when the operation of the pump is stopped. The pumped water that has passed through the backflow prevention valve 9 is guided to a gutter 10 through a discharge water tank 11 for reducing pressure fluctuations, and is discharged to a river. A discharge gate 12 is provided between the discharge water tank 11 and the gutter tube 10 for stopping water when the pump operation is stopped and for maintenance and inspection of the pump.

FIG. 2 shows a sectional view of a pumping station according to the prior art. In the prior art, a pump bed 13 and a transmission floor 14 are separated into a two-floor floor type, and the transmission 3 has a structure in which a gantry 15 is provided. On the discharge side, both a discharge gate 12 and a gutter pipe gate 16 are provided. In the meantime, the check valve 9 is provided. The reason for adopting this structure is that the pump is easy to assemble and maintain, and that the load on the floor surface is dispersed. Further, in the prior art, in a discharge channel system, a discharge gate 12 is disposed at a pump discharge port, a check valve 9 is disposed at an inlet of a discharge water tank 11, and a gutter pipe gate 16 is disposed at a discharge port of a gutter pipe. And

In the present invention, the casing cover 4 and the gantry 15 are conventionally placed on separate floors, that is, a so-called two-floor floor type is used. By adopting the single-floor structure shown in FIG. 1, the length of the pump shaft in the axial direction is shortened, and the height of the building 17 can be reduced, so that the pump station can be made compact. In addition, the casing cover 4 has a space for mounting the driving equipment or the power transmission device, and has a sufficient strength against the weight of the equipment and the equipment and the hydraulic downward force generated in the pump. Although it is required to have sufficient bending rigidity, integrating the casing cover and the gantry contributes to the bending rigidity against a downward force.

Next, the check valve 9 is provided on the side wall of the building 17 and the side wall of the building is used as a wall on one surface of the discharge water tank 11, so that the space and space of the plant can be reduced. Further, the discharge gate 12 is arranged as shown in FIG. 1 so as to have both functions of the gutter pipe gate 16 and the discharge gate 12 shown in FIG. FIG. 3 shows a sectional view of a pump having a submerged bearing according to the prior art. The kinetic energy provided by the impeller 19 via the suction channel is converted into pressure energy by the casing 7, the water contact surface of the casing cover 4 is used as a discharge channel, and pumping is guided to the discharge channel 8. Impeller 19
Is rotated via the transmission 3 and the main shaft 20 using the drive unit 2 as a power source. The pump bearing of the main shaft 20 is a submerged bearing 21, and fresh water is supplied through a lubricating water supply line 25 for the bearing lubricating water and the shaft sealing part 22. Water leaking from the shaft sealing portion is discharged by the ground drain 24.

The casing cover 4 and the gantry 1 according to the present invention
FIG. 4 shows an example of a partial structure of a casing cover in which the casing 5 is integrated. By integrating the casing cover 4 and the gantry 15 in FIG. 3, the shaft seal 22 has a structure that enters the inside of the casing cover 4. The water leaked from the shaft seal 22 can be drained by providing a ground drain 24 communicating with the stuffing box 26 on the primary concrete foundation in advance.

In FIG. 3 of the conventional structure, since the volume inside the casing cover is large and the distance between the casing cover and the gantry is long, in the case of replacing the underwater bearing 21 for maintenance and inspection, etc., the shaft sealing portion and the protective tube are required. The underwater bearing lifted on the upper transmission side was replaced. In the present invention, since the disassembly and assembly work of the conventional method cannot be performed as shown in FIG. 4, the present invention is made possible by dividing the protective tube in the vertical direction and the direction perpendicular to the axis as shown in FIG.

In the conventional structure in which the casing cover 4 and the gantry 15 of FIG. 3 are integrated, the size of one part becomes large and heavy, which may be an obstacle to transportation. As described above, the obstacle can be avoided by a structure in which a flange or the like is provided at a joint portion between the casing cover and the gantry and joined and integrated by a bolt or the like. Heretofore, the pedestal has a rectangular shape in the past, but may be any of an octagon, a hexagon, and a circle. In addition, the weight of the integrated casing cover becomes heavy, and the load distributed to the upper and lower two installation floors in the conventional technology is applied to one floor. By taking into account the construction, obstacles can be avoided. Furthermore, in the case of an integral casing cover, it is necessary to consider a structure that makes the axial length shorter, assemble and maintainability, and drain the water leaking from the shaft seal part. This can be avoided by providing a drain pipe communicating with the stuffing box part in advance on the concrete foundation and connecting it to the drain pipe after assembling the casing cover and shaft sealing part. Since it can be replaced, it does not hinder the present invention.

[0023]

According to the present invention, the upper cover of the pump can be used.
A pump casing cover is located on the discharge channel above the pump.
And installing a power transmission device to the pump
Power transmission device is installed because it is also configured as a stand
The mounting base and pump casing cover are integrated.
Pump case for forming the discharge flow path
Mounting covers for supporting pumps and transmissions
It can be used as a support member (strength member). This
So that the conventional mount and pump casing cover
Pump casing, which is also used as a stand of the present invention,
This has the effect that the thickness of the cover can be reduced.
In addition, according to the present invention, the mounting device
The pump casing cover
The conventional stand that was separately installed can be eliminated,
Therefore, the height of the pump station building can be significantly reduced.
There is an effect that can be done.

According to the second aspect of the present invention, the above-mentioned effect is obtained.
In addition to the above, the following effects can be further obtained. That is, ejection
The water tank is connected to the discharge end via the discharge gate and gutter pipe.
Configuration, so that the discharge
It is no longer necessary to provide a discharge port,
Can be installed using the outdoor wall of the building
And the size (width) of the pumping station including the discharge water tank
It is possible to do. Moreover, the discharge tank and the discharge end side
Since a discharge gate is provided between the gutter pipes
There is an effect that there is no need to provide a gutter pipe gate.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a pumping station according to one embodiment of the present invention.

FIG. 2 is a longitudinal sectional view showing an example of a conventional pumping station.

FIG. 3 is an enlarged longitudinal sectional view showing a part of a pump and a transmission shown in FIG. 2;

FIG. 4 is an enlarged longitudinal sectional view showing a part of a pump and a transmission shown in FIG. 1;

5 is a plan view (a) and a front view (b) of the protection tube shown in FIG.

FIG. 6 shows another embodiment of the present invention, and is a view corresponding to FIG.

DESCRIPTION OF SYMBOLS 1 ... pump, 2 ... drive unit, 3 ... transmission, 4 ... casing cover, 5 ... suction water passage, 6 ... dust removal equipment, 7 ... casing, 8 ... discharge water passage, 9 ... check valve, 10 ... Gutter pipe, 11
... discharge tank, 12 ... discharge gate, 13 ... pump floor, 14
... transmission floor, 15 ... gantry, 16 ... gutter gate, 17 ... building, 18 ... embankment, 19 ... impeller, 20 ... main shaft, 21 ... underwater bearing, 22 ... shaft seal, 23 ... protection tube, 24 ... ground drain , 25 ... Lubrication water supply line, 26 ... Stuffing box.

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Yusuke Arai 603 Kandamachi, Tsuchiura-shi, Ibaraki Hitachi, Ltd. Tsuchiura Plant (56) References JP-A-55-153899 (JP, A) JP-A-4- 22797 (JP, A) JP-A-5-172082 (JP, A) JP-A-5-263783 (JP, A) JP-A-52-14060 (JP, A) JP-A-3-107597 (JP, A) Japanese Utility Model Application Hei 3-68571 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F04D 13/00 F04D 29/00

Claims (2)

(57) [Claims] And 1. A pump, and drive equipment of the pump, a power transmission device to be installed between the pump and the drive equipment, the pump station and an upper cover der Lupo pump casing cover of the pump, The pump casing cover has a
A water channel is formed, and at the same time, it also serves as a base for the power transmission device.
A pumping station, characterized by being constituted by: 2. The pump according to claim 1, wherein the pump is
Pump casing cover and pumping station
Installed outside the pump station via the drainage channel
Connected to the discharge water tank, this discharge water tank has a discharge gate and gutter
The structure is connected to the discharge end side via a pipe,
The discharge tank is installed on the outdoor wall of the pump station,
A pump station , wherein a check valve is provided at an end of the water channel on the side of the discharge water tank .