RU2822767C1 - Telescopic reclamation pump station water outlet - Google Patents

Abstract

FIELD: hydraulic engineering.

SUBSTANCE: water outlet structure of the reclamation pump station is installed on the end section of pressure pipeline 3 arranged in the channel. End section of pressure pipeline 3 is rigidly fixed in concrete base 2, made in the form of a support plate, and is oriented vertically. Water outlet is made in the form of two box structures connected with possibility of telescopic movement relative to each other, note here that inner box 4 is rigidly secured to concrete base 2 while outer box 5 can displace vertically along inner box 4. To the upper rib along the perimeter of the external movable box 5, the pipe sections are rigidly attached, tightly connected to each other, forming float 6 with a crest, which is fixed against transverse movement by means of rigidly fixed in concrete base 2 vertical rods 8, passing through sliding couplings 7 with holes of elliptical shape, mounted in joints of pipe sections.

EFFECT: increased reliability of device operation due to prevention of backflow of water at emergency stop of pump.

1 cl, 3 dwg

Description

The invention relates to hydraulic engineering, and more specifically to water outlet structures of reclamation pumping stations.

A water outlet structure for a reclamation pumping station is known, including an initial section of a channel in which an end section of a pressure pipeline is located, behind the outlet section of which two blank walls are installed, at the end of which grooves are made to allow installation of a gate in the event of an emergency at the pumping station. (Analogue. Handbook of reclamation and water management. 4. Structures: Handbook / Edited by P.A. Polad-zade. - M: Agropromizdat, 1987. - 464 p., Fig. 9.19, b.)

The disadvantage of the known device is the high cost of the water outlet structure and the insufficiently reliable prevention of the danger of an emergency situation at the pumping station during a power outage due to low speed and the occurrence of reverse flow of water in the pressure pipeline.

A water outlet structure for a reclamation pumping station is known, including an initial section of a channel in which an end section of a pressure pipeline is located, to the outlet section of which a locking mechanism is connected with the possibility of rotation on an axis. (Analogue. Handbook of reclamation and water management. 4. Structures: Handbook / Edited by P.A. Polad-zade. - M: Agropromizdat, 1987. - 464 p., Fig. 9.19, b.)

The disadvantage of the known device is the high cost of additional energy consumed by the pumping station due to the need to increase the pressure to maintain the shut-off valve in the open state when the pumping station is operating, especially at low costs, and a decrease in operational reliability during operation due to an increase in the friction force in the axis .

A water outlet structure is known, including a structural element of a siphon connected to the end section of a pressure pipeline, the outlet section of which is located in the water area of the channel. (An analogue. Handbook of reclamation and water management. 4. Structures: Handbook / Edited by P.A. Polad-zade. - M.: Agropromizdat, 1987. - 464 p., Fig. 9.20, a.)

The disadvantage of the known device is the high cost of the siphon and the need to deepen its outlet section under the water level in the channel to ensure its stable operation, which increases the discharging time of the siphon when a reverse flow of water occurs in the pressure pipeline when the power supply to the pump is turned off or an emergency occurs.

The closest in terms of the set of essential features to the claimed technical solution, taken as a prototype, is a device representing a special water outlet structure. The solution taken as the prototype is taken as the closest in terms of the set of essential features to the claimed technical solution, which is a water outlet structure installed at the end section pipeline placed in a channel, made in the form of a closed container with an open ridge and flexible movable walls attached to a rigid base with the ability to move vertically, equipped with a device for adjusting the position of the chamber walls. (Patent UA 2873, MKP E02B 0013/00 dated 04/29/1994.)

The disadvantage of the prototype is the complexity of the regulating and actuating mechanisms, which require constant manual adjustment to maintain operating parameters and changes in operating characteristics during the operation of the structure.

An analysis of known technical solutions has shown that the technical problem in this area is the need to expand the arsenal of water outlet structures for reclamation pumping stations.

The technical result of the invention is to increase the reliability of the device by preventing the occurrence of reverse water flow during an emergency stop of the pump.

To solve this technical problem and achieve the stated technical result, a water outlet structure for a reclamation pumping station of a telescopic type is proposed, installed at the end section of the pipeline located in the channel, characterized in that the end section of the pressure pipeline is rigidly mounted in a support plate installed at the bottom of the channel and oriented vertically , the water outlet is made in the form of two box-shaped structures connected, with the possibility of telescopic movement relative to each other, while the inner box is rigidly attached to the concrete base, and the outer box is installed with the ability to move vertically along the inner box, and to the upper edge along the perimeter of the outer movable boxes, pipe sections are rigidly attached, hermetically connected to each other, forming a float with a ridge, which is secured against transverse movement by means of vertical rods rigidly fixed in the concrete base, passing through sliding couplings having elliptical holes mounted at the junction points of the pipe sections.

The design of the proposed telescopic type water outlet structure is illustrated by the drawings shown in Fig. 1, 2, 3:

in fig. Figure 1 shows a longitudinal section along the axis of the pressure pipeline of the water outlet structure at the maximum water level in the channel;

in fig. Figure 2 shows a longitudinal section with a completely empty water intake channel and pressure water conduit;

in fig. Figure 3 shows a plan of the water outlet structure.

The water outlet of the structure is installed in the bottom of channel 1 on a concrete slab 2, in which the end section of the pressure pipeline 3 of the pumping station, which has a vertical outlet, is rigidly fixed. The inner box 4 is rigidly attached to the concrete base 2, and the outer box 5 is installed with the ability to move vertically along the inner box 4. Sections of pipes, hermetically connected to each other, forming a float 6 with a ridge, are rigidly attached to the upper edge of the box 5 along the perimeter. To prevent lateral movement of the movable box 5 relative to the inner box 4 due to vibrations of the water surface in the water intake basin and channel, sliding couplings 7 are installed to the links of the float 6 at their connecting points, through which guide rods 8 pass, rigidly fixed in the concrete base 2 and installed vertically . To compensate for the inaccuracy of the vertical installation of the guide rods 8, the couplings 7 have elliptical holes.

To ensure a minimum geodetic rise of water during the filling of the channel, the depth of the water intake basin 10 is set such that when the channel is completely emptied, the crest of the float 6 is no higher than the bottom 9 of the water intake channel, at the level of which the water level in the water intake basin 10 is set when the channel is completely emptied and telescopic water outlet.

The proposed telescopic type water outlet works as follows. In the described design of the water outlet structure, the upper section of the movable box 5 along the float crest is in plan a closed rectangular weir with a round-cylindrical head, the position of which will be the same relative to the water level in the channel, regardless of its flow rate. This is due to the fact that when the water level in the channel rises, the float will move the movable box up, and when the water level in the channel drops, the lifting force of the float will decrease and, under the influence of its own weight, the movable box will lower until the float restores buoyancy boxes

In the absence of water in the channel, under the influence of gravity, the movable box 5 drops to a certain minimum level, determined by the height of its side walls. In this case, the mark of the float 6 crest should not exceed the mark of the bottom 9 of the outlet channel. When the pumping station is turned on, boxes 4 and 5 are filled with water, which along the perimeter of the float 6 crest will begin to flow into the channel, filling it to the level determined by the flow curve 11 in Fig. 1 main channel in accordance with the flow rate of the irrigation schedule. When the water level in the channel rises to a level that ensures flooding of the links 6 pipes of the float, under the influence of the buoyancy forces of the float, the movable box will begin to rise following the rise in the water level in the channel. When the calculated depth in the main channel is reached, the movement of the movable box will stop.

Compared to the prototype, the proposed device will ensure reliable operation of the structure, in addition, it will make it possible to reduce the electricity consumed by the pumping station and its cost, which are proportional to the pressure developed by the pumping station and equal to the difference in water levels in the chamber and in front of the pumping station, preventing the occurrence of reverse flow of water during an emergency stop pump

Claims (1)

A water outlet structure for a reclamation pumping station of a telescopic type, installed at the end section of the pipeline located in a channel, characterized in that the end section of the pressure pipeline is rigidly fixed in a concrete base made in the form of a base plate and is oriented vertically, the water outlet is made in the form of connected, with the possibility telescopic movement relative to each other, two box-shaped structures, while the inner box is rigidly attached to the concrete base, and the outer box is installed with the ability to move vertically along the inner box, and pipe sections are rigidly attached to the upper edge along the perimeter of the outer movable box, hermetically connected between itself, forming a float with a ridge, which is fixed from transverse movement by means of vertical rods rigidly fixed in the concrete base, passing through sliding couplings with elliptical holes mounted at the junction points of pipe sections.

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