SU1337480A1 - Water=lowering needle-filter installation - Google Patents

Abstract

The invention relates to the construction, in particular to lowering the level of groundwater, and is aimed at improving the efficiency and reducing the metal consumption by reducing the dimensions of the pumping unit. This is achieved by using a flow shaper and a rotary lamella deflector in the pumping unit, as well as by performing an ejector vacuum pump in the form of a vertically mounted plate with mixing chambers, diffusers and receiving groove formed in it. Reducing the size of the pump unit allows the use of a needle filter unit in cramped conditions, in particular in underground workings. 1 h. item f-ly, 6 ill. (L with 00 vj 4 oo

Description

The invention relates to the drainage of soil in the construction of buildings and structures, in particular, to devices for reducing the level of subsurface land by pumping them out using needle filters.

The purpose of the invention is to increase efficiency and reduce metal consumption by reducing the size of the pumping unit.

FIG. 1 is a schematic diagram of a water-based needle-filter installation; in fig. 2 - ejector vacuum pump, general view; in fig. 3 is a section A-A in FIG. 2; in fig. 4 - section B - B in FIG. 2; in fig. 5 shows a section B-B in FIG. 2; in fig. 6 is a cross-section of an r-h plate deflector in FIG. one.

A water filtering unit includes needle filters 1, a suction manifold 2, a connecting hose 3, a waste line 4 and a pumping unit communicating with them, including a centrifugal pump 5, a circulating tank 6, an overflow tank 7, an overflow pipe 8, communicating the overflow 7 and circulating 6 tanks, and an ejector vacuum pump consisting of a plate 9 diametrically and hermetically passed through the receiving tank 10, a row of nozzles 11, placed with the minimum possible tag in the rear end wall of the plate 9, pressure chamber 12, ger etically attached to the receiving tank 10 on the side of the nozzles 11, and the expander 13 attached to the other, opposite to the end wall of the plate 9. The 11th chamber 12 is attached to the pump discharge port o, and the expander 13 is flanged to the overflow tank 7, opposite the outlet from The distributor 13 has a plate-shaped deflector 14 at an angle to the flow, with the end part smoothly bent along the flow.

Plate deflector can be made rotary. In this case, the lamellar deflector is given the opportunity to rotate around the vertical axis 15, and in the case of finishing the optimal angle between its plane and the flow direction, the lamellar deflector can be rigidly attached to the walls of the overflow tank 7.

Circulating tank 6 contains an air valve 16 with a drive lever 17, connected by an air line 18 with a receiving tank 10, an overflow valve 19 with a driving lever 20, communicated by a bypass line 21 with a pressure chamber 12, a float 22, an enclosure 23 raised in the bottom parts under the drive lever 20 at its extreme upper position, and a discharge pipe 24 with a visor 25, which prevents the formation of air funnels at the entrance to the pipe.

The discharge line 4 with a regulating valve 26 is connected to the bypass line 21 by means of a discharge pipe 27. In the body of a vertically installed plate 9 of an ejector vacuum pump, exactly with the nozzles 11, ejector chambers 28 of mixing and diffusers 29 are located parallel to each other, whose outlets are faceplate 9 opposite to nozzles.

 The continuation of the diffusers 29 is the common for all of them; the iritel 13, having the same solution angles as the opening angle of the diffusers.

In the body of plate 9 opposite the weekend

The 5 holes of the nozzles 11 are made in the form of a through transverse groove common to all ejectors receiving chamber 30.

In order to reduce the hydraulic resistance at the entrance to the receiving chamber 30, the lower part 31 of the plate 9 is sharpened.

0 towards gyutoku. Pressure chamber 12 has a manhole 32, muffled by a lid 33 combined with a flow shaper coaxial with the plate 9 and including side walls 34, cloths 35, a segment 36 having a radius equal to the radius of the inner surface of the pressure chamber 12, a frame 37 contouring .: 1st parts of nozzles 11, two directions 38, converging from the edges of the segment 36 to the inlets of the nozzles and attached to the frame 37 and the edges of the segment 36.

0

five

In the case of a plate deflector 14, one or several eccentrics 39 are fastened to a rotary drive, fastened to a rotary axis 40, having a drive in the upper part accessible to service.

The plate deflector 14 serves to stabilize the operation of the ejectors at lower vacuum values (0.4-0.5 kgf / cm) and at the same time is a device for

shock-free diversion of flow from expander 13 into overflow tank 7. Discharge shock without impact is ensured by setting deflector 14 at a certain angle to the flow and smooth bending of the end part of the deflector: during the flow, the radius of the bent part of the deflector should be at least not less eccentric radius. All this streamlines the flow and improves the conditions for the separation of air from it, the increased content of which in the water reduces the performance of the centrifugal pump 5.

The pumping unit is connected to the connecting sleeve 3 by means of a receiving pipe 41, welded into the lower part

receiving tank 10.

Water fine-point installation works as follows.

The pump unit is filled with water so that its pump 5 is under the bay.

When the pump 5 is turned on, the water in the circulation tank 6 first flows under the visor 25, then through the discharge nozzle 24 into the pump 5, and from there under pressure into the pressure chamber 12, which is part of the ejector vacuum, then the float 22 acts on the drive lever 20, as a result, the bypass valve 19 opens, through which water flows through the bypass line 21 from the pressure chamber 12 to the circulation tank 6 and maintains the water level required for normal operation of the pump 5. The enclosure 23 prevents the float 22 from fluctuating water levels in the circulation tank 6, which makes the pumping operation

pump, In a pressure chamber with a “, ...”

by means of the flow shaper, the water O of the unit is more smoothly stable (with minimal hydraulic losses) is supplied to the nozzles 11 installed above each other. Upon leaving the nozzles, water, mine receiving chamber 30, postPumping of the pump unit with flow shaping and deflector provides the efficiency of the ejector vacuum pump and installation in general.

drifts into the ejection chambers 28 of displacement 5 Constructive execution of the pumping aggregates and diffusers 29, and from there through the expansions of the ejectors in the common plate decreases

The barrel 13 is placed in the overflow tank 7. At the exit of the de-effector 13, the flow meets the deflector 14, along which the stream rushes into the overflow tank 7. The required

its intensity and size, which improves the conditions of use of the installation in cramped conditions, in particular

, .-. g. in underground workings

the position of the deflector 14 relative to 20

Claims (2)

1. A water filtering unit, including a suction booster with a needle filter, a discharge pipe and a pump unit with a circulating tank, float, air and by-pass valves, communicated with the circulating tank of the overflow tank and through the suction pump, a vacuum under the action of which the cutting platform - a centrifugal pump, vacuum terrestrial water according to the needle filters 1, the collection whereupon the drive mechanism of the deflector 14 is fixed in the selected position. From the overflow tank 7, the water, partially freed from air, returns through the overflow pipe 8 to the circulation tank 6. As a result of the work of the ejectors in the receiver 2, which is common to all of them, to the driver 2, the connecting sleeve 3 and the receiving port 41 enters the receiving tank 10, and then to the receiving chamber 30. From the receiving chamber 30, the underground water along with the working water coming from the nozzles 11 It is directed through the mixing chambers 28, the diffusers 29 and the expander 13 into the overflow tank 7, as a result of which the water level in the pump unit begins to rise. Selecting the appropriate degree of opening of the regulating valve 26, provide such a flow of water discharged to the side through the discharge nozzle 27 and the discharge line 4, at which the water level in the tank 6 will vary in one direction or another with a minimum speed. After that, the pump unit operates in automatic mode. If the water level in the circulation tank 6 reaches the upper limit position, the float 22 acts on the drive lever 17, which opens the air valve 16, and atmospheric air through the air line 18 enters the receiving tank 10. As a result, the vacuum in this tank and other elements of the pump with ejectors, receiving and pressure chambers, the latter of which is connected to the discharge port of the centrifugal pump, and the diffusers of the ejectors - with the overflow tank, characterized in that 35 in order to increase efficiency and reduce metal consumption by reducing the dimensions of the pump unit, the overflow tank is equipped with a plate-mounted deflector with a curved end part mounted opposite ejector diffusers at an angle to their axis, the vacuum pump is made in the form of longitudinal diffusers and chambers displacement and transverse through-receiving groove, with fastened. nozzles placed at the back end of the slab, placed between the stove and the overflow tank with a sweeper with opening angles equal to the opening angle of the diffusers and a flow former with two vertically installed in the pressure chamber  located adjacent to the nozzles plates, and the rear part of the plate is placed along the receiving chamber and is made with a pointed lower end. 2. Installation according to claim 1, characterized in that the plate-shaped deflector is provided with an inflowing system, and the inflow 55 Dom with cylindrical eccentrics and groundwater is reduced. In that case, it is pivotally mounted on a vertical axis, when the water level in the circulating ba, and the bend radius of the end part of the defka 6 reaches the lower limit of the electric collector exceeds the radius of the eccentrics. In this case, the float 22 acts on the drive lever 20, as a result, the overflow valve 19 is opened, through which water flows through the bypass line 21 from the pressure chamber 12 to the circulation tank 6 and maintains the water level required for normal operation of the pump 5. The enclosure 23 prevents the float 22 from fluctuating water levels in the circulation tank 6, which makes the pumping operation   ", ..." aggregate more stable aggregate more stable The implementation of the pump unit with the formation of the flow and the deflector provides increased efficiency of the ejector vacuum pump and the installation as a whole. Constructive execution of the pump assembly with ejectors in the common plate decreases1. A water filtering unit, including a suction collector, 5 lecturers with needle filters, a discharge pipe and a pump unit with a circulating tank, float, air and by-pass valves, communicated with the circulating tank of the overflow tank and through a suction cutting log - centrifugal pump vacuum 0 a pump with ejectors, a receiving chamber and a pressure chamber, the latter of which is connected to the discharge port of a centrifugal pump, and the diffusers of ejectors are connected with an overflow tank, which is 5 in order to increase efficiency and reduce metal consumption by reducing the dimensions of the pump unit, the overflow tank is equipped with ejector plates installed opposite the ejector diffusers at an angle to their axis plate deflector with a curved end part, the vacuum pump is designed as a vertically mounted plate with longitudinal diffusers and chambers formed in it displacement and transverse through-receiving groove, with nozzles fixed at the back end of the slab, placed between the stove and the overflow tank of the extender with opening angles equal to bubbled opening angle diffusers, and set in the pressure chamber formoobra- zovatelem stream with two vertically  located adjacent to the nozzles plates, and the rear part of the plate is placed along the receiving chamber and is made with a pointed lower end. 2. Installation according to claim 1, characterized in that the plate-shaped deflector is equipped with a lead, f W2B30    1D 4G G7 / 1 - / - / g 4 26 18 985 11 19 20 1 FI.2 Jj 6-6 figl in-in 31. Sree.5 city 6