JPH0871533A - Pump equipment for removing sand based on difference in water level between divided water tanks - Google Patents

Abstract

PURPOSE: To certainly prevent the accumulation of sandy soil in a water tank by generating a difference in a water level between water tanks partitioned by a partition wall by operating a pump and sucking, circulating or stirring the water in the water tank on the side of the pump by jet water ejected from a through-hole nozzle. CONSTITUTION: A partition wall 3 is provided in a water tank 2 for a solid-liquid mixed liquid of every kind at a position lower than an inflow port 4 to divide the water tank 2 into water tanks A, B and pumps 5,5' are arranged in the water tank B and the inflow water from the inflow port 4 is introduced into the water tank A on the side opposite to the pumps. Nozzles 7... are provided to the bottom part of the partition wall 3 so as to pierce the same and the bottom surface of the water tank A is formed into a shape allowing a solid to easily flow out of the water tank A and the bottom surface of the water tank B is formed into a shape allowing the water in the water tank B to easily flow by the jet water from the nozzles 7. When the pumps 5, 5' are operated, the water level in the water tank B lowers to generate a difference in water level between the water tanks A, B and the water in the water tank A is ejected into the water tank B from the nozzles 7 to fluidize and stirr sedimented sand.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to various solid-liquid mixed liquids, tanks for sewage, muddy water, rainwater, sewage, etc., and pump equipment for mixing various solid matters such as relay pump equipment in sewers. It is a thing.

[0002]

2. Description of the Related Art In pump water tank equipment such as a drainage pit where solid matters such as sand are mixed, the solid matters gradually precipitate and accumulate, making it difficult for the pump to suck, and eventually obstructing the suction port. , Conventionally, pumps with stirring blades are used, jet stirring is performed with pressurized water, stirring is performed using the inflowing water force flowing into the water tank, or mud removal work of the water tank is regularly performed. .

[0003]

DISCLOSURE OF THE INVENTION For example, in a pump with a stirring blade in which a drive shaft of a submersible pump is projected to the lower side of a suction port, and a stirring blade is provided on the suction shaft, a cloth break or wrapping occurs when vinyl is mixed in the operation. There is a drawback that the pump is liable to cause vibrations due to the collision and wear of the solid matter on the stirring blade due to its structure, and the pump life is generally short. Although the method of injecting and stirring the pressure water is easy to handle all, the pressure water source to be used and the operating cost are problems. In addition, the method of stirring by using the inflow water force is very effective when there is always a certain amount of inflow water, but it becomes difficult to obtain sufficient agitation power when the inflow water amount is small, and the accumulation of solid matter There is a problem that it becomes difficult to prevent

[0004]

In order to solve these problems, in the present invention, a partition wall is provided so as to divide a water tank in which a pump is installed, and one or a plurality of through holes are provided at the bottom of the partition wall. Provide a nozzle. Further, in order to effectively use the jet water from the through-hole nozzle, the corners around the bottom of the water tank on which the pump is installed are smoothly formed with an inclined surface or an arc so that the water flows smoothly.

The inflow port to the water tank is provided in each of the divided water tanks, but it falls into the vicinity of the penetrating nozzle, near the partition wall on the side of the water tank where the pump is installed using the downflow gutter and the shatterproof wall. Then, the stirring of the water in the water tank on the pump side is promoted.

Further, pumps are installed in both of the partitioned water tanks, and the pumps are operated alternately.

[0007]

In the pump water tank facility configured as described above, when the pump installed in the partitioned water tank is operated, the water level in the water tank on the operating pump side decreases The water level difference began to occur, and the amount of water corresponding to this water level difference was injected from the through-hole nozzle provided at the bottom of the partition wall into the water tank on the operating pump side, and the water around the jet flow was also attracted and precipitated. Solid matter such as sand is fluidized and agitated to float so that it can be easily sucked by the pump so that the whole water tank on the pump side is gradually circulated. Floating matters on the surface of the water tank are also sucked by the pump and eliminated.

The direction of agitation and flow in the water tank on the pump side depends on the shape of the water tank and the position and direction of the through-hole nozzle.
Alternatively, the jets may be swirled horizontally, or jets may collide with each other, or the jets may collide with the wall surface to create a turbulent flow.
In water tank equipment such as general drainage pits, smooth circulation in the vertical direction is effective. Regarding the strength of the jet water from the through-hole nozzle, the volume of the water tank on the pump side should be small, and the volume of the water tank on the anti-pump side should be large. The smaller the size, the stronger the jet flow, but the selection is made in consideration of the site conditions such as the particle size passing through the through-hole nozzle.

Further, if the inflow water to the water tank facility is made to flow into the pump side water tank, the amount of jet water of the through-hole nozzle is reduced by the same amount as the amount of inflow water and the jet water is weakened so that it flows into the water tank on the opposite pump side. The jet water from the through-hole nozzle strengthens.

[0010]

First Embodiment The present invention will be described below with reference to the drawings. In the first embodiment shown in FIGS. 1, 2 and 3, the partition wall 3 is provided with an inlet 4 so as to divide the water tank 2 in the manhole 1.
The pumps 5 and 5 ′ are installed at a lower position, and the pumps 5 and 5 ′ are installed in the water tank B so that the inflow water is introduced into the water tank A on the side opposite to the pump via the screen 6. At the bottom of the partition wall 3, the partition wall 3
3 through-nozzles 7 penetrating through are provided, the bottom surface of the water tank A on the anti-pump side is formed in a downward slope so that the mixed solids can easily flow out from the through-hole nozzle 7, and the corners around the bottom surface of the water tank B on the pump side are It is formed as an inclined surface, and is further rounded so as to be smoothly connected to the bottom surface so that the water in the tank can easily flow by the jet water from the through-hole nozzle 7. The installed pumps 5 and 5'are activated by the upper float switch a and stopped by the lower float switch b to perform automatic operation. The pump 5'is a preliminary pump and the pumped water of the pumps 5 and 5'is discharged to the outside of the tank. It is what is done.

[0011]

Second Embodiment Next, in a second embodiment shown in FIGS. 4, 5 and 6, a partition wall 13 is provided so as to divide the inside of the rectangular water tank 12, and four through-hole nozzles 17 are provided. The inflow port 14 to the water tank flows into the pump-side water tank B1 and the gutter 34 is used to effectively use the inflow water force for stirring and circulating the water in the tank.
In this embodiment, the shatterproof wall 35 is provided to allow the water in the pump side water tank B1 to fall and flow into a position that promotes the agitation of circulating water.

[0012]

[Third Embodiment] In the third embodiment shown in FIGS. 7, 8 and 9, vertical pumps 25 and 2 are respectively provided in the divided water tanks.
5'is installed, and an inflow port 24 is provided so that inflow water into the water tanks equally flows into both water tanks. The through-hole nozzle 27 has a bend pipe-like object which is embedded downward in the bottom of the partition wall 23. Both water tanks A2 and B2 are inclined and rounded at the corners around the bottom surface thereof. It is an example formed so as to easily flow and flow.

[0013]

As described above, in the present invention, by operating the pump installed in one of the water tanks, the water level difference f is generated between the water tanks, and the jet flow generated from the through-hole nozzle is, for example,
At a water level difference of 10 cm, the initial jet velocity is 1.3 m / s, and at a water level difference of 30 cm, the initial jet velocity is about 2.26 m / s. By effectively utilizing this jet flow, water tank equipment that requires stirring and circulation is required. In addition, the solid matter that settles and accumulates on the bottom of the pump water tank facility is circulated and agitated without using a power source at all, and is suspended from a high water level immediately after the pump starts pumping until a low water level at which the pump stops. By continuously agitating the jet flow of the same degree, not only the inflowing solid matter but also the solid matter such as sand deposited and accumulated on the bottom surface of the water tank while the pump is stopped can be gradually fluidized and removed.

In addition, since the suspended matter floating on the surface of the water tank is also entrained in the circulating water and discharged by performing the circulation stirring in the vertical direction, it is also effective in preventing the generation of foul odors in sewer facilities.

In particular, in the first embodiment shown in FIG. 1, since the inflow port to the water tank is provided in the water tank on the side opposite to the pump, the jet velocity from the through-hole nozzle also increases in accordance with the increase in the inflow water amount, and the more powerful It can perform agitation in various circulations.

In the second embodiment shown in FIG. 4, since the water inlet of the water tank is provided in the pump side water tank, the solid matter that easily mixes in the inflow water immediately settles in the pump side water tank, and the pump side water tank. As the water level rises, relatively clean water flows backward from the through-hole nozzle and stays in the water tank on the side opposite the pump.

Further, the inflow water guided by the gutter and the scattering prevention wall promotes the circulation agitation of the water tank on the pump side, and the reduction of the jet water from the through-hole nozzle which decreases as the amount of inflow water into the water tank increases. Complement. When the pump is in operation when the amount of inflowing water is small, the agitating circulation of the water tank on the pump side is performed by the accumulated water in the water tank on the opposite pump side.

In the third embodiment shown in FIG. 7, if one of the pumps installed in both water tanks is operated, the water tank on the operating pump side is circulated and agitated so that it can be implemented in a relatively small water tank. By alternately operating, the sediment can be removed from both water tanks.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a first embodiment.

FIG. 2 is an internal plan view of the first embodiment.

FIG. 3 is a side sectional view of the first embodiment.

FIG. 4 is a vertical sectional view of a second embodiment.

FIG. 5 is an internal plan view of the second embodiment.

FIG. 6 is a side sectional view of a second embodiment.

FIG. 7 is a vertical sectional view of a third embodiment.

FIG. 8 is an internal plan view of the third embodiment.

FIG. 9 is a side sectional view of the third embodiment.

[Explanation of symbols]

2, 12, 13 Water tank 3, 13, 23 Partition wall 4, 14, 24 Inlet port 5, 5'Submersible pump 15, 15 ', 25, 25' Vertical axis type pump 6, 16, 26 Water pipe 7, 17, 27 Through-hole nozzle 33 Pump mounting guide 36 Pump motor a, b, c A float switch for starting, stopping, and alarming.

Claims (2)

[Claims] 1. A partition wall is provided so as to divide a water tank in which a pump is installed, and a through-hole nozzle is opened at the bottom of the partition wall so that when the pump is operated, the water level difference between the partitioned water tanks is increased. A water tank facility for a pump that induces and circulates or agitates the water tank water on the operating pump side with the jet water that is ejected from the generated through-hole nozzle. 2. The water tank equipment of the pump according to claim 1, wherein the water tank bottom corner on the side where the pump is installed is formed into an inclined surface or an arc shape so that the jet water from the through-hole nozzle can flow smoothly.