RU191089U1 - PUMPING STATION - Google Patents

Abstract

The utility model relates to the field of wastewater disposal, in particular to systems protecting sewer pumping stations from water hammer and liquid mass shock arising when starting and stopping pumps in various modes, closing valves and gate valves, and emergency shutdown of pumps. The utility model aims to protect sewer equipment pumping stations against water hammer and liquid mass shock.

Description

The utility model relates to the field of water disposal, in particular to protection systems for sewage pumping stations, from water hammer and liquid mass shock arising from starting and stopping pumps in various modes, closing valves and gate valves, and emergency shutdown of pumps.

Known "Pump station" with a housing, a bottom and a waterproof partition, containing pumps with suction nozzles, a supply pipe and pressure pipes, characterized in that the waterproof partition is connected above the bottom of the station with attached to the housing on the side opposite to the supply pipe, a horizontal partition forming with a bottom the cavity into which the suction nozzles of the pumps are connected (see patent RU 74929 U1, published: 07/20/2008 Bull. No. 20).

This device has disadvantages consisting in:

- the impossibility of preventing the influence of a mass of liquid on the pumps in the event of a halt in their operation;

- the impossibility of preventing the outflow of fluid back into the cavity, in case of stopping the operation of the pumps;

Closest to the invention in technical essence is the “Sewage pumping station” (see patent RU 165486 U1, published: 10/20/2016 Bull. No. 29), containing a receiving tank in the form of a cylindrical body with a grate container located under the sewage supply pipe, submersible pumps are placed in the receiving tank, installed with the possibility of vertical movement along the rails and connected by an automatic pipe coupling with pressure pipes with check valves and gate valves, level sensors vk switching and shutting down the pumps connected to the control panel, a forklift installed above the ceiling with openings made in it, an exhaust ventilation system, characterized in that the opening covers are complementary to the openings and are made of stainless steel sheet in the form of concave covers with mounting rings , the cylindrical body of the tank is made in the form of a capsule of sheet stainless steel, sequentially coated with a heat-insulating layer, embedded fittings attached to a capsule of stainless steel and, with reinforcing road mesh, geotextile film covered by retaining rings, anchor fastening elements are made at the base of the cylindrical body, the exhaust ventilation system includes a vertically mounted exhaust shaft with a fan and a supply shaft.

There is a development option when the Sewer Pumping Station may contain additional sewage inlets located above the grate container.

This installation is characterized by low reliability indicators, since in case of stopping the operation of the pumps, the liquid stream moves in the opposite direction (towards the pumps). At the same time, the check valves are affected by the entire mass of liquid in the pressure pipe, which can lead to premature wear of the check valves or their emergency failure.

The objective of the utility model is to increase the reliability indicators of a known device.

The problem is solved in that the known device containing a receiving tank, a sewage supply pipe, two pumps connected to pressure pipelines with check valves, according to a utility model, is additionally equipped with:

suction piping of pumps connecting the receiving tank to the pumps;

two pressure lines; two hollow columns;

two anti-directional check valves;

a connecting pipe connected to two pressure lines, with two anti-directional check valves, with two pressure pipes so that the connection points of the pressure pipes and anti-directional check valves match.

In this case, the hollow columns are connected to the anti-directional non-return valves, the non-return valves are located between the pumps and the connecting pipe, and the anti-directional non-return valves are installed so that when the liquid moves up, they close, and when they move down, they open, moreover, the hollow columns at the upper points of the hollow columns connected to the atmosphere at

N≥N _n vd + P,

where N _{n vd} is the difference in elevations of the upper point of the pressure lines and the upper point of the connecting pipe;

P - pressure loss in the pressure line from the point of its connection with the connecting pipe to the mark of the upper point of the pressure lines.

A brief description of the drawings.

In FIG. 1 shows a section of the proposed “Pumping station”, and in FIG. 2 its view in plan.

The pump station contains:

1. The receiving tank 1;

2. The sewage supply pipe 2, connected to the receiving tank 1;

3. The suction piping of the pumps 3, connecting the receiving tank 7 with the pumps 4;

4. Pressure pipelines 5 connecting the pumps 4 to the connecting pipe 6;

5. Check valves 7 mounted on the pressure pipelines 5, located between the pumps 4 and the connecting pipe 6;

6. Pressure lines 8, with the upper points of the pressure lines 9, connected to the connecting pipe 6;

7. Hollow columns 10 connected to the atmosphere at the upper points of the hollow columns 11 at a level of at least H;

8. Anti-directional check valves 12 connected to hollow columns 10 and connecting pipe 6 so that when the liquid moves up, the anti-directional check valves 12 are closed, and when moving down, they open;

In this case, the connection points of pressure pipelines 5 and hollow columns 10 are the same.

The device operates as follows.

In the first operating mode, when the pumps 4 start up or operate in the water supply mode, the liquid flows through the sewage supply pipe 2 to the receiving tank 7. After filling it, when the pumps 4 are turned on and working, the liquid is sucked in through the suction pipes of the pumps 3 and through the pumps 4 rises through the pressure pipelines 5, enters the connecting pipe 6, and is fed through the pressure lines 8. In this case, the check valves 7 open and the anti-directional check valves 12 are closed. Therefore, the pumped liquid does not rise in the hollow column 10 above the anti-directional check valves 12. If the anti-directional check valves 12, for example, due to clogging with long-fiber or other substances contained in the pumped liquid, become clogged, the liquid begins to flow into the hollow columns 10, but liquid transfusion will not occur, since the difference in elevations of the upper point of the pressure lines 9 and the connecting pipe 6 (N _{n vd} ) in total with the pressure loss in the pressure line le 8 (P) from the point of its connection with the connecting pipe 6 to the mark of the upper point of the pressure lines 9 will be less than the mark of the upper point of the hollow columns 11, because N≥N _{n w} + P.

In the second mode of operation, when the pumps 4 are stopped, the liquid stream moves in the opposite direction, accompanied by a water hammer. In this case, the anti-directional check valves 12 are opened, and the air from the hollow columns 10 enters the connecting pipe 6, thereby breaking the stream of liquid moving in the opposite direction. Due to this, part of the liquid located in the pressure lines 8 does not move towards the pumps 4, as a result of which the mass of the fluid acting on the check valves 7 is reduced. Accordingly, the mass of the fluid acting on the check valves 7 is reduced, thereby reducing the probability of their failure, and therefore, the reliability of the known device is improved.

Thus, the claimed system for improving the reliability of a sewage pumping station ensures the achievement of the required technical result, which consists in increasing the reliability of the known device.

Claims (4)

A pump station comprising a receiving tank, a sewage supply pipe, two pumps connected to pressure pipelines with non-return valves, characterized in that it is additionally equipped with suction pipelines of pumps connecting the receiving tank to pumps, two pressure pipelines, two hollow columns, two anti-return valves, a connecting pipe connected to two pressure lines, with two anti-directional check valves, with two pressure pipes In such a way, the connection points of the pressure pipelines and the anti-directional check valves coincide, while the hollow columns are connected to the anti-directional check valves, the check valves are located between the pumps and the connecting pipe, and the anti-directional check valves are installed so that they close when the liquid moves upward, and when moving downward, in addition, the hollow columns at the top of the hollow columns are connected to the atmosphere at N≥N _n vd + P, where N _{n vd} is the difference in elevations of the upper point of the pressure lines and the upper point of the connecting pipe; P - pressure loss in the pressure line from the point of its connection with the connecting pipe to the mark of the upper point of the pressure lines.

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