The intake device

 

(57) Abstract:

The intake device refers to devices and mechanisms for exploitation of groundwater and water intake structures, in particular for pumping of artesian water in the main line of urban water systems. The device includes accommodated in the casing tube well discharge pipe, multi-section pump with submersible motor and the device hydroplane in the composition of the housing and the sealing element, the inner cavity of which is connected with a line of high pressure, laid along the penstock, and the case of the adaptation of hydroplane installed with the possibility of reciprocating displacement along the axis of the discharge pipe and is made in the form of a segment of pipe, the ends of which are provided with flanges. The sealing element is designed in the form of two inflatable chambers, one of which is placed in the internal cavity of the housing, and the other in the area between the case of the adaptation of hydroplane and the wall of the casing wells, the average diameter of the pipe segment housing is chosen equal to half the difference between the values of the external diameter of the flanges and the diameter of the pressure truboprovodny pipe casing devices hydroplane. This allows you to combine working plane devices hydroplane with the static water level in the well, i.e., to increase the degree of rarefaction of air over its dynamic level and thus increase the power intakes. 1 Il.

The invention relates to devices and mechanisms for exploitation of groundwater sources and intakes, particularly for pumping of artesian water in the main line of urban water systems.

Known water intake device containing discharge pipe immersed in the borehole multistage pump gear shaft running inside the discharge pipe, and a motor mounted on the frame above the mouth of the well [1].

The presence of known devices gear transmission, not allowing you to accurately adjust the clearance between the impellers and guide apparatus of the pump, leading to a greater volume loss, reduced feed pressure and efficiency of the pump.

Closest to the proposed to the technical essence and the achieved effect is the intake device containing housed in a casing theobromine in the corps, rigidly mounted on the delivery pipe below the static water level in the well, and the sealing element, the inner cavity of which is connected with a line of high pressure, laid along the discharge pipe [2].

A disadvantage of the known device consists in the following. It is known that underground sources subject to seasonal fluctuations in natural water level. The most undesirable are irreversible lowering of the static water level in skaine, which can be caused, for example, education of the district of depression under the influence of water from nearby wells. Regardless of hydrologic conditions on power intake can be affected by clogging of wells torn parts of the intake device, clogging of a strainer wells, etc., Therefore, the known device is equipped with a device hydroplane, which is rigidly mounted between the flanges (top and bottom) two pieces of pipe, the discharge pipe below the static water level. This allows to reduce the impact of natural water level in the well at the power intake. However, in the rigid fastening devices hydroplane, the VA, what is the result of education in the casing pipe bore water column due to the weight of which the sealing element acts excess pressure under simultaneous exposure to the underside of the specified element rarefied air, secondly, is not achieved the maximum effect from the use of devices hydroplane, which is the higher, the closer to the static water level posted by the sealing element (the distance between the specified element and the housing of the pump depends on the degree of rarefaction of air over the dynamic water level in the well), which affects the capacity of the water intake.

An object of the invention is to increase the capacity of the water intake.

This task is solved in that the intake device housing adaptations of hydroplane installed with the possibility of reciprocating displacement along the axis of the discharge pipe and is made in the form of a segment of pipe, the ends of which are provided with flanges, the sealing element is designed in the form of two inflatable chambers, one of which is placed in the internal cavity of the housing, and the other in the area between the case of the adaptation of hydroplane and the wall of the casing wells, the average diameter of the discharge pipe, and the cavity of the inflatable chambers connected by a hose, passes through a through hole made in the wall of the pipe segment corps devices hydroplane.

The drawing shows the proposed device and explain its working.

The unit is mounted in the casing pipe 1 well and contains a discharge pipe 2, mnogosektsionye pump 3 with the water intake grid 4, submersible elecrodvigatel 5, device 6 hydroplane and line 7 high blood pressure. The case of the adaptation of hydroplane made in the form of a segment of the pipe 8 with the flanges 9 and 10, and its sealing element in the form of two inflatable chambers 11 and 12, the cavity of which is connected by a hose 13.

The device operates as follows.

The natural water level in the casing pipe 1 is characterized by a static level, the value of A1 (A2) which depends on the hydrodynamic characteristics of groundwater and magnitude of atmospheric pressure. When the water from the aquifer level in the well is reduced by the value of S1 (S2), which is greater than the higher performance of the unit in the structure of the pump 3 and the motor 5. With the onset of equilibrium between the amount of pumped through the intake grid 4 voutes 5 dynamic level (curve B1 (B2) in the drawing), which, rising gradually as the distance from the well, forms a so-called cone of depression radius R1 (R2).

When mounting the unit in the casing 1 of his device 6 hydroplane placed on the section of the discharge pipe 2, the walls of which when submerged device to a predetermined depth will pass through the interface in the well. Part of the fixture 6 is made of light material pipe section 8 with flanges 9 and 10, between which is placed an inflatable chambers 11 and 12. Cavity chambers are connected by a hose 13 so that when the air supply line 7 high pressure volume of the chambers 11 and 12 of the first pressure Po reaches a value at which the device 6 POPs up, and then under the action of pressure Px closes the gaps with casing pipe 1 and the pressure pipe 2.

As a result, after running the motor 5 to the balance between the volume pumped into the distribution network of water and its volume flowing into the casing 1 from the aquifer (i.e., the achievement of dynamic water level) will be reduced (compared to atmospheric) pressure on the surface of the water, causing more of her prickley motor 5 with the purpose of maintenance or repair work pressure Px in the cavity between the inflatable chambers 11 and 12 through the line 7 is reduced to the original value Po, when restored gaps with casing pipe 1 and with the pressure pipe 2 for a smooth lifting device from the well.

Thus, in the non-rigid attachment devices 6 on the delivery pipe 2 completely exclude the possibility of education in the casing pipe bore water column, the excess pressure on the walls of the inflatable chambers 11 and 12 in the presence of a rarefied environment under the latter imposes additional constraints on the choice of the design of the device 6 hydroplane device. Combining the work plane devices hydroplane with static level allows you to achieve maximum effect from the use of the device, because the degree of rarefaction of air over the dynamic water level in the well is determined by the distance between the sealing element of the device and the pump casing, which allows to increase the capacity of the water intake.

In addition, seasonal fluctuations or permanent lowering of the static water level A1 in the well, for example when lowering it to the value A2, the pressure Px of the air in the chambers 11 and 12 of device 6 off of elektrodvigatel the spine with level A2. The result excludes the effect of air column height dS on the degree of rarefaction of air over the dynamic water level in the well that allows you to partially compensate for the lower power intake for seasonal and permanent lowering of the static water level in the well.

Sources of information

1. Shabalin, A. F. Operation of industrial pipelines. - M.: metallurgy, 1972, S. 143.

2. Application N 95105997/03 (011002) from 18.04.95, "the Intake device. The decision VNIIKP for a patent for invention from 22.04.96,

The intake device containing housed in a casing tube well discharge pipe, multi-section pump with submersible motor and the device hydroplane in the composition of the housing and the sealing element, the inner cavity of which is connected with a line of high pressure, laid along the discharge pipe, wherein the case of the adaptation of hydroplane installed with the possibility of reciprocating displacement along the axis of the discharge pipe and is made in the form of a segment of pipe, the ends of which are provided with flanges, the sealing element is designed in the form of two inflatable chambers, one of which is placed bidney tube wells, the average diameter of the pipe segment housing is chosen equal to half the difference between the values of the external diameter of the flanges and the diameter of the discharge pipe, and the cavity of the inflatable chambers connected by a hose, passes through a through hole made in the wall of the pipe segment corps devices hydroplane.

 

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The invention relates to devices and mechanisms for exploitation of groundwater sources and intakes, particularly for pumping of artesian water in the main line of urban water systems

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