JP2011144616A - Method and equipment for lifting mud using pump - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve problems wherein, in the case of using a submerged pump with a stirring blade, vibration and damage easily occur, and, in the case of using a land-installed type pump, it is difficult to mount a stirring device, so suction can be performed only by a push-in system, and further an accident to disable pumping such as sinking of the submerged pump itself and blocking of a suction opening is caused due to falling-in sediment. <P>SOLUTION: A pump tab 10 is installed to surround the whole submerged pump or the suction opening of the land-installed type pump at the bottom of a reservoir. A plurality of nozzles penetrating through a pump tab wall are provided in the periphery of the bottom of the pump tab 10 constituted by a bottomed or bottomless cylindrical body having the same height as the submerged pump. An outer peripheral opening part of each nozzle is opened with the upside covered, and communicated with an auxiliary water absorbing cylinder extending upward at a fixed height along the pump tab 10. A vertical slit-like water absorbing opening is provided on the outer peripheral side of the auxiliary water absorbing cylinder. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to pump equipment (hereinafter collectively referred to as “storage tank”) in washing equipment, cooling water equipment, rainwater collection drainage equipment, sewer relay pumping stations, sand basins, storage equipment, rainwater drainage ponds, etc. The present invention relates to a method of collecting and discharging sand, sludge, sludge, iron oxide powder, sand and mud soil (hereinafter collectively referred to as sediment) in drainage for civil engineering work, ceramics, and the like.

Conventionally, in the discharge of sediment in a storage tank or civil engineering drainage, a submersible pump with a stirring blade or a flushing unit that drains by flushing pressure water around the pump suction port.
In the sewer relay pump hall, the “pre-swirl tank”, which is a circulating agitation facility using the inflow water flow, has come to be often used.

  JP H8-71533 A   JP H8-276174   JP 2006-132192 A

In the case of using a conventional submerged pump with agitating blades, the agitating blades are attached so as to protrude from the pump casing below the main impeller, so the wear is large, and there is little wear and foreign matter. Vibrations are likely to occur due to collision and winding of long objects, and this vibration is very harmful to the shaft seal device (mechanical seal) of the submersible pump and dominates the pump life.
In addition, the stirring blade requires a driving force.

In the method of flushing the pressure water to the suction port of the pump, there are problems such as requiring not only a pump and piping for pressure water but also a large power.
In the case of using a land-mounted pump, there is a problem that it is almost impossible to stir the suction port except for flushing.

In the present invention, in the case of the whole submersible pump, or in the case of a land-mounted pump, a cylinder with a bottom or no bottom (hereinafter referred to as a “pump tab”) is stored so as to surround the suction port. Install at the bottom of the tank.
The height of the pump tub is about the height of the submersible pump when the reservoir water is almost completely drained, but there is little change in the water level in the tank due to the drainage of the pump, or there is a large amount of sediment generated. In some cases, the height is close to the full water surface or protrudes above the water surface.
Around the bottom of the pump tab, one to a plurality of nozzles penetrating the pump tab wall are provided, and the nozzles are ejected in the direction of circulating the water in the pump tab or toward the center.

The outside of the pump tab on the inflow side of the nozzle is opened so as to cover the upper side so as not to be easily buried in the sediment, and is communicated with an auxiliary water absorption cylinder that is extended upward by a certain height along the pump tab wall.
The auxiliary water-absorbing cylinder is made high enough not to be buried in sediment, and the longitudinal slit-shaped water inlet for sucking in external water is closed.

  Furthermore, in the slit-like water inlet of the auxiliary water absorption cylinder, in order to remain only in the removal of the vertical sediment in the vicinity of the front surface of the water absorption opening, the auxiliary water absorption cylinder is disposed at a position separated in the circumferential direction to the vicinity of the adjacent nozzle, The tunnel communicates with a tunnel-like water channel provided with a mud opening that opens to the outside about the lower half of the outer peripheral side.

If the pump operation is performed with the sediment accumulated outside the pump tab of the present invention configured as described above, the pump mainly collects inflow water from the upper end of the pump tab until the reservoir water level reaches the upper end of the pump tab. After suction and normal drainage and the reservoir water level reaches the top of the pump tab, the water level in the pump tab drops rapidly, and the surrounding water deposits from the slit-shaped water intake at a height where the external water is not buried. While flowing in, the sediment that collapses from the slit-like water inlet into the auxiliary water-absorbing cylinder is flown and injected into the pump tab from the nozzle.
The inside of the pump tab is circulated by jet water, or sucked into the pump while being directly blown into the pump suction port, and the sediment flowing into the pump tab is surely removed.

  In equipment with a tunnel-like water channel between the nozzle and the auxiliary water absorption cylinder, even if the water suction port of the water channel is buried in the sediment, a gap remains on the upper side and water can easily pass through. While the inflowing water from the cylinder flows through the tunnel-like water channel, the falling sediment from the opening is mixed up by the flowing water force and reaches the nozzle.

  The inflow water velocity from the nozzle into the pump tab flows at a pressure obtained by subtracting the resistance of the nozzle and the flow path from the water level difference inside and outside the pump tab. For example, when the water level difference is 30 cm, 65% can be used effectively. In this case, the speed is about 1.95 M / sec. In addition, the entire pump drainage amount may be used, which is sufficient for circulating stirring of the precipitate in the pump tab.

  The inflow water velocity from the nozzle can be adjusted within a pressure range below the reservoir water level by selecting the pump tab height and the nozzle area.

As described above, the pumping equipment of the present invention has no agitation action that resuspends the sediment once settled outside the pump tab, and does not generate extra consumables when removing the sediment. It is possible to continue safe operation by protecting the pump even in the event of an unexpected mass collapse of the surrounding sediment.
In a storage tank with a small amount of sediment generated, the supernatant water can be taken normally at a higher water level than the pump tub, and the drainage water level can be lowered periodically to selectively remove the sediment. .
If the amount of sediment generated is large, increase the pump tab height to increase the pumping time, and in large storage tanks with multiple pumps installed, make the pump tab height protrude above the full surface. In addition to dealing with small changes in the water level during drainage, it is possible to avoid sucking contaminated water into other pumps.
The use of a pump tab in civil engineering works has great economic and technical effects such as easy temporary movement.

The apparatus sectional drawing of the example which shows embodiment which used this invention for the submersible pump. The apparatus sectional drawing of the example which shows embodiment which used this invention for the land installation type pump. AA view (upper view) of FIG. (A) is a longitudinal cross-sectional view of the pump tab of the first embodiment of the present invention equipment, (b) is an EE cross-sectional view, and (b) is a CC cross-sectional view of (a). (C) is a BB view of FIG. 4 (A), and (D) is a DD cross-sectional view. FIG. 4 shows a front view of the pump tab. (A) is a longitudinal cross-sectional view of the pump tab of the second embodiment, showing a GG cross-sectional view of (b), and (b) showing a FF cross-sectional view of (a). These are the longitudinal cross-sectional views of the pump tab of 3rd Example, and show the KK cross-sectional view of FIG. 9 (C). (C) is a II sectional view of FIG. 8, (D) is a JJ sectional view. (A) shows a longitudinal sectional view of the fourth embodiment with the bottom of the pump tab of FIG. 8 embodiment, and (e) shows an NN view of (b). (F) shows a longitudinal sectional view of the extension tube, and (g) shows an MM view of (f). (H) shows details of the g tunnel water channel portion of FIG. 4 (A), and (R) shows details of the auxiliary water absorption cylinder i portion of FIG. 4 (B).

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

FIG. 1 is an apparatus diagram of an embodiment in which a pump tub 10 which is the facility of the present invention is installed in a storage tank 1 using a submersible pump 3, and the upper end height of the pump tab 10 is normally set to the same level as the submersible pump. However, if necessary, the extension tube 40 shown in FIG. 11 is manufactured to a predetermined height L and is connected and fastened with bolts and nuts or the upper end of the pump tab 10 is directly extended. As shown, it can also protrude from the full water surface e.
In the figure, “b” indicates a predicted deposition line of the precipitate, and “c” is a predicted residual deposition line of the precipitate that cannot be excluded.
FIG. 3 is a plan view taken along line AA of FIG. 1, and an arrow in the pump tab 10 in the drawing indicates a jet water flow from a nozzle provided on the lower side of the pump tab 10.

FIG. 2 is an apparatus diagram of an embodiment in which a pump tab 10 is installed below a suction pipe 6 of a storage tank 1 that uses a land-mounted pump 5.
H in the figure indicates a water level difference h in an operation state in which drainage by the pump proceeds and the water level of the storage tank 1 is lower than the pump tab 10.

The pump tab 10 of the first embodiment is shown in FIGS. 4, 5, 6 and 12. FIG.
In the present embodiment having four nozzles, as shown in FIG. 5 (d), the outer peripheral side water intake p of the nozzle k for introducing the external water of the pump tab 10 into the pump tab 10 is communicated with the tunnel water channel g. 6 and the lower end of the outer peripheral side wall of the tunnel water channel g is opened outward as shown in FIG. 6 and the suction port n of FIG. The holes j are communicated with auxiliary water absorption cylinders i formed by four members 16 on the inner peripheral side of the outer cylinder member 11 shown in FIGS. 4 (B) and 12 (R).
On the outer peripheral side of the auxiliary water absorption cylinder i, a slit-shaped water absorption port m extending over almost the entire height is opened.
In addition, the size of the nozzle k, the tunnel channel g and the height of the suction port n, and the slit width and number of the suction port m take into account the amount of water absorbed by the pump to be applied and the size of the sediment to be restricted. Determined.
In addition, the water suction port m of the auxiliary water absorption cylinder i can be a small hole arranged close to the vertical direction, or the auxiliary water absorption cylinder i can be provided with a constriction hole on the outer peripheral side and the upper end.

As shown in FIGS. 7 (a) and 7 (b), the second embodiment integrates the structure of the auxiliary water absorption cylinder i of the above-described embodiment. -D sectional view is the same structure as FIG. 5 (C) and (D).
In the present embodiment, an inner cylinder member 26 is disposed on the inner periphery of the outer cylinder member 21 to integrally form the auxiliary water absorption cylinder i, and the end portions of the four tunnel water passages g communicate with each other through communication holes j. To do.

The third embodiment is a pump tab 30 using a curved member 31 in which the outer cylinder member is divided into the same number as the nozzle k and having no tunnel water channel, as shown in FIGS. .
As a length in which a part of the circumferential length of the bending member 31 overlaps with an adjacent bending member, a circumferential end of the bending member 31 that is higher than the opening height of the nozzle k, one end inward, and the other The edges are rapidly bent outward.
The curved members 31 are combined in a substantially circular shape as shown in FIGS. 9 (A) and 9 (D), and the upper and lower cavities of the overlapping portions of the adjacent curved members 31 are formed as auxiliary water absorption cylinders i, and rapidly inward. The bent end portion is provided with a gap between the inwardly adjacent curved member to form a slit-like water inlet m, and the rapidly bent outward portion is brought into contact with the adjacent curved member on the outer periphery. Join by welding.
A portion where the end of the bending member 31 is not rapidly bent inward and outward communicates with the auxiliary water absorption cylinder i and forms a nozzle k penetrating the pump tab 30 inward and outward, and can be manufactured with a very small number of parts.

In the fourth embodiment, as shown in FIGS. 10 (a) and 10 (e), the third embodiment shown in FIG. 8 is provided with a bottom plate. In order to make sure that the function of the present invention equipment is exerted reliably, the pump tab 30 itself is provided with the bottom plate 32 and the submersible pump is mounted in the pump tab 30.
The members 37 and 38 are reinforcing members.

  11 (f) and (g) show an embodiment of the extension pipe 40, the pipe member 41 is provided with a mounting flange 42, manufactured at a height L required for the water tank, and connected to the upper end of the pump tab for use. .

  The equipment of the present invention, which does not require power and has no consumables, is designed to eliminate sediment in civil engineering wastewater, factory plants, sewerage storage tanks, etc., in a rational manner according to the equipment conditions, and at the same time, the pump is buried unexpectedly. The function of protecting from the water can greatly contribute not only to the economic effects of safe and stable operation of the pump, but also to the improvement of the environment around the storage tank.

DESCRIPTION OF SYMBOLS 1 Storage tank 2 Inlet 3 Submersible pump 4 Discharge piping 5 Pump 6 Suction pipe 10, 20, 30 Pump tab 11, 21 Outer cylinder 12, 22, 32 Flange member 13, 23, 33 Flange member 14, 24 Partition member 15, 25 Nozzle member 16 Member 26 Inner cylinder member 31 Curved member 36 Bottom plate member 37 Reinforcement member 38 Reinforcement member 41 Tube member 42 Flange member a Virtual zenith of pump tab or extension pipe b Predicted accumulation line c Predicted residual accumulation line e Full water level g of storage tank Tunnel water channel h Difference in water level inside and outside the pump tab during drainage Auxiliary water absorption tube j Through hole k Nozzle m Slit-type water intake n Tunnel water channel mud port o Bolt hole p Nozzle inlet

Claims (4)

  A submersible pump installed at the bottom of the water or a pump tab made of a cylindrical body with or without a bottom is installed around the suction port of the pump that opens near the bottom of the water. An auxiliary water absorption cylinder that opens the nozzle to be closed and extends in the vertical direction is provided, and a pump tab having a vertical slit-like water absorption opening on the outside of the auxiliary water absorption cylinder and having a lower end communicating with the nozzle is provided. A muddying method that uses it to remove sediment.   At least one nozzle penetrating the pump tab wall is closed on the lower side of the pump tab made of a cylindrical body with or without a bottom, and an auxiliary water absorption cylinder is attached vertically along the pump tab wall. A pumping equipment in which a water suction port having a plurality of small holes arranged in a slit shape or in a vertical direction is opened outside the auxiliary water absorption cylinder, and a lower end is communicated with the nozzle.   A pumping facility in which the circumferential position of the auxiliary water absorption cylinder in claim 2 is provided near an adjacent nozzle that is separated from the nozzle, and communicated with a tunnel-like water channel having a constant lower side opening therebetween. The pump tab according to claim 2 is configured using the same number of curved members as the nozzle.
That is, as a length in which a part of the circumferential length of the bending member partially overlaps with the adjacent bending member, at the circumferential end of the bending member, an end portion of a portion higher than the nozzle height established on the lower side, One end is bent inward and the other end is bent outward.
The curved member is formed into a substantially circular shape, and the end portion rapidly bent outward is set to the inner peripheral side, is brought into contact with the outer peripheral side member, and the tip end of the end portion rapidly bent inward is located on the inner peripheral side. The vertical cavity portion of the portion where adjacent curved members overlap is formed by providing a slit-shaped gap between the members and forms an auxiliary water absorption cylinder.
A pumping equipment constructed so as to form a nozzle in which a lower side portion that does not rapidly bend the end portion of the bending member inward and outward penetrates inward and outward.

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