RU19545U1 - INSTALLING INDIVIDUAL WATER SUPPLY - Google Patents

Abstract

Individual water supply installation

The utility model relates to the field of water supply, namely to domestic pumping units.

The task is to create an inexpensive domestic domestic automatic station with a maximum set of consumer qualities.

The technical result consists in increasing the stability of the work and expanding the functionality of the installation. It is achieved by the fact that the individual water supply installation, comprising a pump, pipelines, an air-water tank-accumulator, an automatic control unit and a manometer, additionally contains a chassis on which all components are attached, and which is both a connecting and distributing water supply system (comb), a temperature sensor for protection against overheating, mounted on the engine casing, a water level sensor for protection against dry running, located at a certain depth above the intake check valve. In this case, the engine is powered by direct current, which makes it possible to adjust the speed.

The use of a membrane tank as a hydraulic accumulator significantly reduces the frequency of switching on the pump and provides a smoother change in pressure in the water supply (compensation of hydraulic shocks).

ESSAY

Description

EPLM 1/00

Individual water supply installation

The utility model relates to the field of water supply, namely to domestic pumping units.

Most domestic pumps offered by the domestic industry for domestic water supply do not have the functions of automatic pumping stations, such as automatic shutdown functions when a certain pressure is reached, the accumulator and the engine overheat. For all their advantages, pumping stations of foreign manufacturers sold on our market are very sensitive to fluctuations in the supply voltage, require additional costs for equipping with water-distributing combs, filters and valves. In addition, they are very expensive for our consumer.

So, the well-known household automatic pumping unit CALPEDA (Italy), consisting of a pumping unit, a hydraulic accumulator tank, a set of automation, a connecting hose and a pipe (Industrial equipment. Collection No. 1,119,1999, p. 17).

However, powering the motor with alternating current does not ensure stable operation of the station at a reduced mains voltage of 180 V.

A well-known installation of individual water supply, selected as a prototype, which contains a pump, pipelines, a baccumulator and a monometer (St. Utility Model No. 3950, EOSV 1/00, Bull. Utility Models, No. 4.1997, p. 28). However, in the known installation, protection against dry running and from overheating of the engine is not developed, stable operation of the engine is not ensured at a low voltage.

The task is to create an inexpensive domestic domestic automatic station with a maximum set of consumer qualities. The technical result consists in increasing the stability of the work and expanding the functionality of the installation. It is achieved by the fact that the installation of individual water supply.

comprising a pump, pipelines, an air-water storage tank, an automatic control unit and a pressure gauge, further comprises a chassis on which all components are mounted, and which is both a connecting and distributing water supply system (comb), a thermal sensor for protection against overheating, mounted on the engine housing , a water level sensor for protection against dry running, located at a certain depth above the intake check valve. At the same time, the engine is powered by direct current, which ensures stable operation of the installation and makes it possible to adjust the speed.

The use of a membrane tank as a hydraulic accumulator significantly reduces the frequency of switching on the pump and provides a smoother change in pressure in the water supply (compensation of hydraulic shocks).

Figure 1 presents a diagram of a pump installation, Figure 2 is a diagram of a pump installation with a submerged pump.

An individual water supply installation consists of a pump 1, a diaphragm tank 2 (hydraulic accumulator), a manometer 3, a chassis - distributing and connecting the water supply 4, a pressure sensor 5, a temperature sensor 6, distributing valves 7 and a control unit 8. All this is mounted on the chassis water supply 4 In addition, the installation includes a water supply 9, a wire of the dry-running sensor 10, a dry-running sensor 11 and a check valve 12.

The installation is as follows. First, the water supply 9 and pump 1 are filled with water through the inlet funnel 13. After that, the inlet funnel valve closes. The non-return valve 12 and the dry run sensor 11 must be below the surface of the water. Distribution valves must be closed. The network cable 14 is connected with a plug to an electrical outlet. The installation is ready to go. We put the network switch on the switch panel 15 in the "on. At the same time, in the control unit 8, the pressure sensor relay 16, the dry-running relay 17, the engine temperature relay 18, as well as the network voltage control device, which is part of

switch and alarm panels 15. If the water level is normal, the pressure on the pressure sensor 5 is low, the engine temperature is normal and the mains voltage is normal, the pump 19 relay is activated. The pump starts to pump water from the intake 20 through the supply pipe 9, through the chassis-supply pipe 4 into a membrane tank 2, which consists of a cylindrical steel tank, bisected by an elastic rubber membrane. On both sides of the membrane, two chambers are formed - air and water. Air is pre-pumped into the air chamber under a pressure slightly lower than the pressure of the water to which pressure sensor 5 is configured. When the pump is running, water is pumped into the water chamber and begins to force the membrane through, compressing the air in the air chamber. The air pressure in the air chamber is selected in such a way that water occupies 90% of the volume of the membrane tank 2. At this point, the water pressure reaches the nominal pressure sensor 5, which is tuned to, it turns off and sends a signal to the pump 19 relay, and that in turn turns off the engine. If you open one or more taps of the distributing valve 7, then the water begins to exit the membrane tank 2 under the pressure of compressed air in the air chamber. When emptying 60% of the membrane 2 tank, the pressure drops to a value sufficient to return the pressure sensor 5 to its original position. The pump is turned on again and runs until the water consumption stops and the membrane tank 2 is full. Thus, the membrane tank 2 is, on the one hand, a water storage tank and, on the other hand, a damper during hydraulic shocks (sudden pressure surges) due to elasticity membrane and air chamber air.

The operation of the control unit 8 in emergency situations is as follows. In addition to the pressure sensor 5, the control unit 8 is also connected to the dry run sensor 11 and the temperature sensor 6. They, at a low water level or high temperature of the pump motor, send a signal to the dry run relay 17 and, accordingly, to the motor temperature switch 18. The pump motor is switched off and light up corresponding warning lights located on the panel

switches 15. On this panel, in addition, there are relays for the maximum and minimum voltage of the network, which, when triggered, also send a signal to the pump switch relay 19 to inhibit the operation of the pump motor, which is indicated by turning on the corresponding signal lamps on the switch panel 15. The pump motor switch is made according to smooth switching circuit on the triac. This reduces the inrush current through the motor windings, which accordingly increases the life of the station. The dry run sensor circuit 11 is powered by a reduced alternating voltage 9v from the power supply unit 20, which eliminates the effect of the polarization phenomenon of the dry run sensor electrodes 11, and this allows the use of electrodes from any, including dissimilar metals and alloys, in the sensor 11, and to improve the reliability of protection against dry running.

Protection and signaling against minimum and maximum supply voltages is carried out using a tracking device on comparators mounted in the control unit.

The use of a non-contact (triac) motor switch ensures a smooth start-up of the engine and, consequently, increases its service life.

Also proposed is a second installation option with a submerged pump (Figure 2). Its difference is that the pump is located in the intake 20, and in the control unit 8 is not connected protection against overheating of the engine, because in this case, the dry run sensor 11 performs this function. It is located above the pump and is activated before the water drops to the pump level, and while the submerged pump is in the water, the motor cannot overheat. Otherwise, the processes are similar to the processes of the first installation option.

Claims (2)

1. An individual water supply installation comprising a pump, pipelines, an air-water storage tank, an automatic control unit and a pressure gauge, characterized in that it further comprises a chassis on which all components are attached, a temperature sensor for protection against overheating, mounted on the engine housing, a water level sensor for protection against dry running, while the engine is powered by direct current. 2. An individual water supply installation comprising a pump, pipelines, an air-water storage tank, an automatic control unit and a pressure gauge, characterized in that it further comprises a chassis on which components are attached, the pump is located in the intake, a water level sensor for protection against dry running, and the engine is powered by direct current.