Device for automatically maintaining pressure in a closed irrigation network

 

The invention relates to agriculture, namely, closed irrigation networks, but can be used in water supply systems and in systems neftegazopererabotki. The device includes a pump and power unit 1 control unit 2, an inlet 3 and outlet 4 pipelines connecting bypass pipeline 5 through the shutoff device 6 with the hydraulic actuator 7, is divided into upper 8 and lower 9 cavity through a piston fixed to the rod 11 of the hydraulic actuator 7, managed additional electrohydraulic 12, the Executive unit 13 which is connected with the upper chamber 8 of the hydraulic actuator 7, and the main electrohydraulic 14, the actuating unit 15 which is connected with the bottom 9 of the cavity of the hydraulic actuator 7. In this, the control unit 16 additional electrohydraulic 12 is connected to the power source through the lower limit of the electric contact pressure gauge 17 (EKM) and relay time delay 18. The control unit 18 of the main electrohydraulic 15 is connected to the power source through the upper limit EKM 17 and relay time delay 19. EKM 17 is installed in the pressure pipe 4 of the pump of the power unit 1. The reed contact 20 mounted on the hydraulic actuator 7, interacts with the magnet 21 is placed on stockho limit EKM 17 and the control unit 22 of a pump and power unit. The invention automates the process of maintaining a predetermined pressure in a closed irrigation network. 1 Il.

The invention relates to agriculture, namely, closed irrigation networks, but can be used in water supply networks and systems neftegazopererabotki.

A device for reducing the pressure rise in a closed irrigation network at overlapping penstock, including circuit breakers connected to the battery and to electrohydraulic, managing hydraulic actuator with the rod locking member mounted on the delivery pipe, a temporary block valves with time relay, reed contact, interacts with the magnet mounted on the piston rod of the hydraulic shut-off body (and.with. 1024037 class. A 01 G 25/09, similar).

The disadvantage of this device is the inability to use the system to automatically maintain the pressure in a closed irrigation network when changing the mode of consumption.

Know another device to eliminate pulsation phenomena, including the pump, equipped with by-pass pipe connecting the output (pressure) pipe with the suction troopsthe automatically maintaining pressure in a closed irrigation network when changing the mode of consumption.

The purpose of the invention is to automate the process of maintaining a predetermined pressure in a closed irrigation network.

This objective is achieved in that the locking device is equipped with additional electrohydraulic, Executive unit which is connected with the upper cavity of the hydraulic actuator, the Executive unit of the main electrohydraulic connected with the lower cavity of the hydraulic drive and control unit additional electrohydraulic connected to the power source through the lower limit of the electric contact pressure gauge (EKM) and relay time delay, and the control unit main electrohydraulic connected to the power source through the upper limit EKM and relay time delay, and the EKM is installed in the delivery pipe of a pump and power unit, in addition, the reed contact interacts with the magnet in the upper position of the piston rod of the hydraulic locking device and serially included in a circuit EKM upper limit and the control unit pumping unit.

Due to the presence of additional elektrogitarre and the relationship of its Executive unit with the upper cavity of the hydraulic locking device and the relationship of the Executive unit of the main electrohydraulic with lower Polo is power over the lower limit of the electric contact pressure gauge (EKM) and relay time delay and the control unit main electrohydraulic to the power source through the upper limit EKM and relay time delay hydraulic connection EKM with pressurised pipeline pumping unit automatically maintaining pressure in a closed irrigation network, set the lower and upper limits, due to partial reset excess pressure (flow rate) of the discharge pipe, tangentially, into the suction pipe.

The set of distinctive features purchased the claimed technical solution gives it a positive quality, not previously known in the analog and the prototype.

This allows to obtain economic benefit, due not only to the preservation of the discharge conduits, sprinkler machines, the stability of the latter, reducing operating costs, but also save energy by 20-30% in comparison with the known methods of controlling and maintaining the pressure in a closed irrigation network.

Because of the coupling between the reed contact magnet in the top of stroke position of the hydraulic valve body and connecting it in circuit EKM upper limit and control unit pumping unit automatically ASU is known either in analogue neither in the prototype and allows you to get a positive effect, consisting in the exclusion of manual control, and thanks to the timely shutdown of the pump to ensure the safety pressure water conduits.

The drawing schematically illustrates a device for automatically maintaining pressure in a closed irrigation network.

The device includes a pump and power unit 1 control unit 2, an inlet 3 and outlet 4 pipelines, Saedinenie tangentially bypass pipeline 5 through the shutoff device 6 with the hydraulic actuator 7, is divided into upper 8 and lower 9 cavity through a piston 10 mounted on the rod 11 of the hydraulic actuator 7, managed additional electrohydraulic 12, the Executive unit 13 which is connected with the upper chamber 8 of the hydraulic actuator 7, and the main electrohydraulic 15, the Executive unit 14 which is connected with the bottom 9 of the cavity of the hydraulic actuator 7. In this, the control unit 16 additional electrohydraulic 12 is connected to the power source through the lower limit of the electric contact pressure gauge 17 (EKM) and relay time delay 18, and the control unit 19 of the main electrohydraulic 15 is connected to the power source through the upper limit EKM 17 and relay time delay 20, will 21, mounted on the hydraulic actuator 7, interacts with the magnet 22, mounted on a shaft 11 in the upper position of the rod 11 of the hydraulic actuator 7 of the locking device 6, and is consistently included in the circuit upper limit EKM 17 and the control unit 2 pump and power unit.

Device for automatic pressure maintenance in a closed irrigation network works as follows.

Start pump and power unit 1 provides a pressure rise in the pressure pipe 4. When the water consumption given the characteristics of the pump the pressure in the delivery pipe 4 is within the prescribed limit between specified lower and upper limits EKM 17. As a result of this locking device 6 of the bypass pipe 5 is in the closed position.

When reducing water consumption in a closed irrigation network is the increase in the pressure in the delivery pipe 4, leading to the displacement of the arrow EKM 17 to the upper limit. As a result, the relay time delay 20 provides a pulse signal to the control unit 19 of the main electrohydraulic 15, which provides water from the discharge pipe 4, through the Executive unit 14 in the lower chamber 9 of the hydraulic actuator 7 of the locking device 6, and the second device 6 and the atmosphere. This provides a partial opening of the locking member 6 and the discharge of the excess pressure from the discharge pipe 4 into the suction pipe 3 of a pump and power unit 2. In case of insufficient opening of the locking member 6, i.e., do not install the pressure in the pipe 4 by a specified amount, is repeated pulse to the control unit 19 of the main electrohydraulic 15, which provides further opening of the valve body 16.

Discrete opening of the locking member 6 is carried out up until the pressure is set to a predetermined value between the lower and upper limits specified EKM 17.

The interval and duration of the signal to the control unit 15 electrohydraulic 14 set time relay 20. Reset in the suction line 3 pumping unit 1 tangentially provides a reduction of the axial load of the pump, which reduces the load voltage of the motor pump of the power unit and reduces electricity consumption for water supply during this operation.

When the pressure in the pipe 4, is due to inclusion of water, to a value lower limit EKM 17 relay time delay 18 provides a pulse signal to the control unit 16 additional electrohydraulic that provide the locking device 6, this Executive unit 14 main electrohydraulic 15 is connected with the upper cavity 8 7 hydraulic locking device 6 and the atmosphere. As a result of this organized discrete closure (similar as the opening) locking device 6 of the bypass pipe 5 until such time as the pressure in the pipeline is set equal to a specified value.

In the case of complete opening of the locking device 6, and installation of pressure to the preset value in the delivery pipe 4 pulse signal from relay time delay 20 is supplied through the circuit reed contact in the unit 2 control pumping unit 1, which makes it stop.

Thus, the proposed device will allow you to automate the operation mode for the pump and power unit and thereby to ensure stable maintenance of the pressure in the pressure piping when changing water in a closed network.

Claims

Device for automatically maintaining pressure in a closed irrigation system, including a pump and power unit with control unit, suction and discharge piping that connects tangentially with a bypass pipe through the locking device hydropressured electrohydraulic, through the unit time delay, the reed contact and the magnet attached to the stem, managing and Executive blocks electrohydraulic, characterized in that the locking device is equipped with additional electrohydraulic, Executive unit which is connected with the upper cavity of the hydraulic actuator, the Executive unit of the main electrohydraulic connected with the lower cavity of the hydraulic drive and control unit additional electrohydraulic connected to the power source through the lower limit of the electric contact pressure gauge (EKM) and relay time delay, and the control unit main electrohydraulic connected to the power source through the upper limit EKM and relay time delay the EKM is installed in the delivery pipe of a pump and power unit, in addition, the reed contact interacts with the magnet in the top of stroke position of the hydraulic valve body and serially included in a circuit EKM upper limit and the control unit pump and power unit.

 

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3 cl, 5 dwg

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