SU1751421A1 - Pump station - Google Patents

Abstract

Use: automatic control systems of sewage pumping stations. Summary of the Invention: a control system 3 in the form of an ejector unit is installed on the pipeline. The system is equipped with a check valve 4 installed at the inlet of the main pumping system, two electric-contact pressure gauges 5.6 and a movable throttle washer. In front of the ejector unit 3, there is a hydraulic cylinder with a piston, kinematically connected with a washer. Ejector node 3 is formed by a section of the pressure line 2 and the nozzle head. The nozzles are communicated via an overflow line 13 with a valve 14 with a pressure line 12 of the auxiliary system. The overhead piston space of the hydraulic cylinder is in communication with the annular gap of the ejector, and the pressure piston is open to the pressure line 2 of the main system. 2 Il.

Description

The invention relates to automatic control systems of a sewage pumping station, in particular, to the automation of switching on and off pumping units.

A well-known system for controlling pumping stations using technological mechanisms controlled remotely (Lysov K.I., Chayuk I.A., Muskevich G.E. Operation of land reclamation pumping stations. M .: Agrogrofomizdat, pp. 142-145). The disadvantage of this control system is the impossibility of automating the process of controlling the entire pump station.

The closest to the invention is a method of controlling a pump station, consisting in measuring pressure and flow in a pressure line, determining the rate of decrease in pressure, comparing measured and determined

parameters with given values, followed by a change in the number of pumps in operation (see ed. St. USSR No. 1216443, class F 04 D 15/00). The disadvantages of this solution are the complexity of the blocking device associated with the presence of a large number of automation elements.

The purpose of the invention is to increase the reliability of the control system of pumping stations that feed livestock drains and irrigation water for mixing into a reservoir-mixer.

This goal is achieved by the fact that in the control system of pumping stations, including pipelines, valves and fittings, the reservoir-mixer, the control device is designed as an ejector unit installed on the discharge pipe of a controlled pumping station, hydraulically connected

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hydraulic cylinder and pressure pipe of auxiliary pumping station.

Fig. 1 shows an automated system of pumping stations for preparing and delivering a mixture of manure and water to the irrigated floor, consisting of a reservoir-mixer 1 connected by a pressure pipe 2, on which the control system 3, a check valve 4 and electrical contact gauges 5 and 6 , with the main pumping system 7. line 8 - with pump 9, and suction pipe 10 - with an auxiliary pumping system 11 transporting the mixture through pipeline 12 to the sprinkler technology and pipeline 13 on which the valve is installed 14. Pipeline 1 3 is associated with a pressure gauge 15 and a control system 3.

FIG. 2 shows a control system including an ejector unit 16, a pressure line 17, on which a throttle washer 18 with a hole 19 is installed, is kinematically connected to a hydraulic cylinder 20, the charge space 21 of which is reported by a tube 22 with an annular gap 23 formed in the pressure line 24, which communicates with the piston space 25 of the piston 26 and the pressure line of the auxiliary pumping system 27

The control system operates as follows. In the reservoir-mixer 1, the pump 9 through line 8 and the main pumping system 7 supply water and drains of the animal-breeding complex for mixing via the pressure pipeline 2. The resulting mixture of the required composition through pipeline 10 is taken up by an auxiliary pump system 11 and transported via pipeline 12 to the irrigation floor to the sprinkler technology.

In the process of preparing the mixture, it is necessary to switch on and off the system of pumping stations. The best option when operating a pumping station system is to install a valve to control the building of an auxiliary pumping system 11, since HC 11 is usually attached to a mixing basin.

When the main pumping system 7 is operating, throttle washer 18 is open, the piston 26 of the hydraulic cylinder 20, due to the created pressure in the pipeline 2 and the vacuum in the piston space 21, is in the upper position. If it is necessary to stop the main system 7, the valve 14 opens on the pipeline 13, located in the building of the auxiliary pump system 11 (the degree of opening of the valve 14

controlled by pressure gauge 15). The working flow through the pressure line 27 is supplied to the ejector unit 16, as a result of which in the pipeline 2 the flow increases, the speed and, consequently, the pressure of the main pumping system 7 changes and reaches the value recorded by the electrical contact pressure gauge 5 at which the system 7 stops.

0 The stop of the pumping station 7 is fixed by a pressure gauge 15, the valve 14 and the check valve 4 are closed, the piston 26 remains in the same position (upper) due to the presence of residual head in the piston space 25. The supply of effluent into the reservoir-mixer 1 is stopped. Auxiliary pumping system 11 supplies the mixture to the sprinkler technology.

If it is necessary to start up the basic system 7, the valve 14 opens, from the discharge line 24 the suction starts as a result of the operation of the ejector unit 16 from under the piston space 25 and from the piston space 21 through pipes 5 and 22, but due to a large difference in pipe diameter 24 and 22 the suction from the space 25 will be more intensive, as a result of which a pressure difference is created in the spaces 21 and 25 and the pore 26 drops, closing the pressure line 17 with the throttle washer 18. The pressure in the pipeline 2 starts velichivats pressure pump to a value of the auxiliary piston 11. The pump system

5 26 will remain in the lower position due to the equalized pressure in the piston 25 and piston 21 spaces using a tube 22. The electrocontact pressure gauge 6 adjusted to the divided pressure, located in front of the non-return valve 4. promotes the start of the main system 7.

After starting the system 7, the check valve 4 opens, in pipe 2 the movement of the effluent through the opening 19 in the throttle washer 18 begins. The valve 14 closes, the pressure in the piston space 25 increases, and in the piston 21 decreases due to

0 suction of fluid from the space 21 through the tube 22. The suction will be produced by increasing the speed in the annular gap 23. The piston 26 rises, the throttle washer 18 is opened The pump 9 can be operated in a similar way.

Compared to the prototype, this solution simplified automation elements and instead introduced a control system installed on the pressure line of the main pumping station.

This increases the operational reliability in the management of pumping systems and improves the technical and economic indicators of applying organic fertilizers to the irrigated floor.

Claims (1)

The invention includes a pumping station containing a main and auxiliary pumping systems with pressure lines, a catch valve and a control system for the main pumping system, which, in order to increase the reliability of the control system, is designed as an ejector unit, the station is equipped with installed at the outlet of the main pumping system, a check valve and two electrocontact manometers, a hydraulic cylinder with a piston located in front of the ejector unit, and a movable throttle valve ayboy - located behind the ejector assembly and kinematically associated with the piston, wherein the ejector assembly formed by the main portion of the pressure line of the pump system and installed therein with an annular gap relative to the pipe walls The nozzle nozzle, which communicates via the bypass line with the pressure line of the auxiliary pumping system, the over-piston space of the hydraulic cylinder is in communication with the annular gap, and the sub-piston space is open to the pressure line of the main pumping system. 1B eight &