SU1355180A1 - Control and protection device for multisupport sprinkler - Google Patents

Abstract

This invention relates to agricultural land reclamation. The purpose of the invention is to increase the reliability of control and protection of the sprinkler (dm). On the pressure pipe 1, a water supply valve 2 with a hydraulic cylinder 3 is installed. The hydraulic cylinder 3 is controlled by means of a hydraulic switch 4 with control channels. The hydraulic switch 4 has nozzles 11-14, between which the flaps 15 and 16 are located. The hydraulic cylinder 3 has a piston 21 and a supra-piston 22 cavity. Program (L ff 1 2

Description

unit 28 contains a diaphragm actuator 29 and is equipped with a hydroprotection mechanism 19. The system provides not only reliable control of the DM in normal operating mode, but also protection in emergency mode. In emergency mode with pressure drop in the pipeline

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The invention relates to the irrigation of agricultural crops with multi-support sprinkler machines (yes) and can be used to remotely control DM,

The aim of the invention is to increase the uncertainty of control and protection of DM.

The drawing shows a diagram of this device.

On the inlet pipe 1, a water supply valve 2 with a hydraulic cylinder 3 is installed. The hydraulic cylinder 3 is controlled by means of a hydraulic switch 4 with pressure channels 5, drain 6 and outlet 7 and 8. Power is supplied to the hydraulic switch 4 through the filter 9 and valve 10.

The hydraulic switch 4 has nozzles 11-14, between which are located the flaps 15 and 16, connected by a lever 17 with a rod 18 of the electromagnet 19, preloaded by the spring 20.

The output channel 7 of the hydraulic switch 4 is connected to the piston cavity 21 of the hydraulic cylinder 3, and the output channel 8 -. to the overpressure cavity 22 of the hydraulic cylinder 3 through a three-way hydraulically controlled valve 23. The three-way valve 23 has an inlet 24, an outlet 25 channels and a drain hole 26 and is equipped with a movable locking member 27 with a through hole. The drain hole 26 communicates with the software block 28. With the program block 28, the drain port 6 of the hydraulic switch 4 is communicated. The program block 28 contains a diaphragm actuator 29 communicating with the pressure pipe 1 behind the valve 2 for supplying water to the DM.

The diaphragm actuator 29 is in contact with the rod 30, on which the pressure in the impulse line 46 of the hydraulic protection and in the elastic volume 45 of the actuator 43 is falling rigidly. At this, a check valve 48 opens, equalizing the pressure in the elastic volume. 1 hp f-ly, 1 ill.

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Replena cylindrical cams 31, 32 and 33. The rod 30 is preloaded by the spring 34. The cam 31 periodically contacts with the spring loaded drain valve 35, completely blocking the drain hole 26 of the three-way valve 23 (drain A), and the cam 32 - with the additional drain valve 36, partially overlapping the drain channel 6 of the hydraulic switch 4 (drain B). The cam 33 is periodically in contact with the pusher 37, acting through the spring 38 on the brush 18 of the electromagnet 19.. .

The software unit 28 is provided with a hydroprotection mechanism 39 including an additional cam 40 interacting with the pusher 37. The cam 40 is loosely mounted on the rod 30 (the rod moves in the axial direction relative to the cam), fixed by a spring-loaded latch 41 and has the ability to rotate around the axis flexible spring loaded tie 42. The spring loaded latch 41 is connected to the actuator 43, formed by two elastic volumes 44 and 45, communicated with the impulse line 46 of the hydraulic protection. The elastic volumes .44 and 45 are unfolded with check valves 47 and 48.

In the impulse line 46 of the hydraulic protection, emergency relief valves 49 are installed in series, mounted on each trolley 50 of the sprinkler. The impulse line or hydraulic protection 46 can be connected to the pressure pipe 1 both before the valve 2 and the water supply (as shown in the drawing), and beyond. The winding of the electromagnet 19 is connected to the on input channel 51 (UflK) via a fixed contact 52 of the pressure indicator 53 installed in the impulse line 46, and to turn off (Ug) to the input channel 54, min 52. To control the pressure in the discharge pipe 1 a water supply valve 2 is provided with a second pressure detector 55. The impulse line 46 of the hydraulic protection is connected to the pressure pipe 1 via the choke 5.

The control and protection of multi-core DM works as follows.

For reliable operation of the pipe network and DM without water hammering, when the last water supply valve is put into operation, the water supply valve 2 is first opened to a pressure value in the range of 1.2–1.5 kGS / cm, after which the valve stem stroke is stopped and the DM is filled with water. Further valve openings are prevented when the pressure rises to 4.0 kgf / cm (for example, for a frigate DM), at which the hydraulic support of the DM support carriages starts to work, and the final stroke of the valve stem 2 of the water supply to the DM is reached when the working pressure is reached 6.2 kgf / cm for the operation of the sprinklers. If the valve is stopped (main operation mode), the pressure behind it rises to 7.0 kgf / cm, the valve is closed. The valve is closed at a planned or emergency stop of the sprinkler at a variable speed. At the beginning of the closing, the speed of movement of the valve block 2 can

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4, water is supplied to the sub piston cavity 2 of the cylinder 3. The water pressure of the piston 22 of the hydraulic cylinder 3 transfers to the left extreme position a movable stop valve 27 with a through hole of the three-way hydraulically controlled valve 23 due to the flow of fluid through the drain channel 6 of the hydraulic switch 4, communicated with the atmosphere through the drain B, partially covered by the valve 36.

After moving the closure member 27 with a through hole to the left 5 extreme position, the inlet 24 of the three-way valve 23 closes. In this case, the over-piston cavity 22 is disengaged with drain B, and communicates with drain A through the opened drain hole 26. At the initial moment, the drain valve 35 is fully open and the water supply valve 2 is opened.

The water pressure behind the water supply valve 2 is increased and monitored by the program block 28, the diaphragm actuator 29 of which moves to the left and at pressures in the range of 1.2-1.5 kgf / cm, the cam 31, acting on the drain valve 35, closes the drain A. The opening of the water supply valve 2 stops, but the pressure downstream of the valve continues to increase smoothly even with a value of 3.0–4.0 kgf / cm (include 20

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35 s in the sprinklers operation) the cam 31 opens the drain valve 35. The water supply valve 2 opens again, but at a pressure of about 6.2 kgf / cm, the second cam 31 again be maximal (for this combination, the drain valve 35 drains A. valve 2), but starting with the mono-opening of the water supply valve 2 of the pressure reducing pressure item in the pipeline DM below 4.0 kgf / cm (pressure.

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If during the operation of the sprinkler the pressure behind the valve 2

under which the hydraulic actuator works

If during the operation of the sprinkler the pressure behind the valve 2

at the same time the valve

the water supply of the post carts DM), the speed of the movement of the water supply valve drops below 6.2 kgf / cm, decreases by 2. The relative decrease of the drain valve 35 opens the drain A, the closing speed of the valve is determined in each particular case by calculation taking into account the distance

the sprinkler from the pumping station. The valve 2 for supplying water rises above 7.0 kgf / cm, the cam 33 for returning the telemechanical command acts on the pusher 37, and later on turning on the machine pulsed through the spring 38 presses on The input signal U j is supplied to the core, raising the pressure to the specified value. If the pressure is over

18 electromagnet 19. spring 20

the coil of the electromagnet 19, the rod 18 acts on the lever 17, which moves down and with the help of the lever moves the flaps 15 and 16, the hydraulic 17 moves the flaps 15 and 16. At the same time, along channel 7 of the hydraulic switch

switch 4. In this case, channel 8 hydraulic neO

4, water is supplied to the sub piston cavity 2 of the cylinder 3. The water pressure of the piston 22 of the hydraulic cylinder 3 transfers to the left extreme position a movable stop valve 27 with a through hole of the three-way hydraulically controlled valve 23 due to the flow of fluid through the drain channel 6 of the hydraulic switch 4, communicated with the atmosphere through the drain B, partially covered by the valve 36.

After moving the closure member 27 with a through hole to the left 5 extreme position, the inlet 24 of the three-way valve 23 closes. In this case, the over-piston cavity 22 is disengaged with drain B, and communicates with drain A through the opened drain hole 26. At the initial moment, the drain valve 35 is fully open and the water supply valve 2 is opened.

The water pressure behind the water supply valve 2 is increased and monitored by the program block 28, the diaphragm actuator 29 of which moves to the left and at pressures in the range of 1.2-1.5 kgf / cm, the cam 31, acting on the drain valve 35, closes the drain A. The opening of the water supply valve 2 is stopped, but the pressure downstream of the valve continues to gradually increase with a value of 3.0–4.0 kgf / cm (including 0

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a sprinkler), the cam 31 opens the drain valve 35. The water supply valve 2 opens again, but at a pressure of about 6.2 kgf / cm, the second cam 31 again closes the drain valve 35 of the drain A. Opening the water supply valve 2 is closed.

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If during the operation of the sprinkler the pressure behind the valve 2

at the same time the valve

the water supply to the open water falls below 6.2 kgf / cm, the drain valve 35 opens drain A,

water supply drops below 6.2 kgf / cm, drain valve 35 opens drain A,

It increases pressure to a predetermined value. If the pressure is over

acts on the pusher 37, and the sequence through the spring 38 presses on the stock

18 electromagnet 19. spring 20

acts on the lever 17, which throws the flaps 15 and 16 hydro-

The switch 4 is connected to the hydraulic switch 4 through the channel 8 of the hydraulic switch 4 and 22 hydraulic cylinders 3 through a three-way hydraulically controlled valve 23. The piston cavity 21 of the hydraulic cylinders 3 communicates via drain 7 with the drain B connected to the atmosphere (drain A blocked at this time). A movable closure body 27 with a through hole of the three-way valve 23 of the hydraulic principle of action moves to the extreme right position. Input channel 24 communicates with output channel 25, and additional channel 26 closes. The water supply valve 2 is closed until the pressure behind it drops below 7.0 kgf / cm. In this case, the cam 33 loses the contact 1c by the pusher 37. The rod 18 of the control electromagnet 19 moves downward and with the help of the lever 17 moves the shutters 15 and 16. At the same time, the pressure of the hydraulic switch 4 is supplied to the hydraulic piston chamber 21 of the hydraulic cylinder 3. Water pressure the over-piston cavity 22 of the hydraulic cylinder 3 flies to the left extreme position a movable locking member 27 with a cold opening of the three-way valve 23 due to the flow of fluid through the discharge channel 6 of the hydraulic switch 4 communicated with the atmosphere through the drain B, p Fully open by an additional drain valve 36. As soon as the movable locking member 27 with the through hole moves to the left end position, the inlet 24 of the three-way hydraulically controlled valve 23 is closed. At the same time, the over-piston cavity 22 is uncoupled with drain B, and communicates with drain A through the opened additional channel 26. But taking into account that the pressure is ea valve 2 supplying water above 6.2 kgf / cm, valve 35 drain A is completely blocked by cam 31. this way, the water supply valve 2 is stopped.

When a telemechanical command is issued to switch off the pulse, the pulse input signal U of reverse polarity is applied to the winding of the electromagnet 19, the rod 18 moves upwards and with the help of the lever 17 moves the dampers 15 and 16, and through channel B of the hydraulic switch 4 feeds the water pressure into the over-piston cavity, 2 hydraulic cylinders 3 through three

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running valve 23. The sub-piston cavity 21 of the hydraulic cylinders 3 through channel 7 communicates with drain B communicating with the atmosphere (drain A is blocked), Lift. The locking member 21 with the through-hole of the three-way valve 23 of the hydraulic principle of action moves to the extreme right position. Inlet: The channel 24 communicates with the outlet channel 25, the drain opening 26 closes. The water supply valve 2 is closed until the pressure behind it drops below the start of movement of the hydraulic drive of the carriages. From this moment, the cam 32 partially covers the additional drain valve 36, reducing the flow through the drain B. The water supply valve 2 continues to close at a slower speed. The closing speed of the water supply valve 2 can still be reduced by the taper of the cam 32.

The operation of the hydraulic protection of the DM is carried out as follows.

When the booster pumping station is activated, pressure in the pressure pipe 1 rises to the water supply valve 2, as well as to the hydraulic protection line 46 and elastic volumes 45 and 44 (through the open non-return valve 47) of the actuator 43. When filling is in progress the pulse line 46, the pressure in the elastic volume 44 due to the throttles 56 is lower than in the pressure pipe 1. The reverse valve 47 is open and the valve 48 is closed. When the process of filling the impulse line 46 of the hydraulic unit and elastic volumes-44 and 45 is completed, the check valve 47 is closed. A small fluid flow is made through the choke 56 to compensate for leaks in the impulse line 46 of the hydraulic protection. When the hydraulic protection is triggered (one of the series-connected water discharge valves 49 opens), there is a sharp drop in static pressure in the impulse line 46 of the hydraulic protection and in the elastic volume 45 of the actuator 43 "The check valve 47 is closed. The overpressure force in the elastic volume 44 of the actuator 43 acts on the elastic volume 45 by moving the spring-loaded latch 41 down. Ku5

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The latch 40 rotates around an axis: due to the action of a flexible spring-loaded rod 42. The pusher 37 is pushed upward and through the spring 38 acts on the rod 18 of the control electromagnet 19 .. The lever 17 moves the flaps 15 and 16. At the same time, through channel 8 of the hydraulic the switch 4 is supplied with water pressure to the over-piston cavity 22 of the hydraulic cylinder 3 through a three-way valve 23 of the hydraulic principle of operation. The water supply valve 2 is closed, and this process is similar to the process for the telemechanical shutdown of the machine. When the pressure drops in the pressure pipe 1, there is a pressure drop in the impulse line 46 of the hydraulic protection and in the elastic volume 45 of the actuator 43. This opens the non-return valve 48, equalizing the pressure in the elastic volume 44.

Claims (2)

1. A control and protection device for a multi-support irrigation machine, including an electro-controlled hydraulic switch, the pressure and drain inputs of which are connected through a drain valve to the drain and through a tap to a pressure pipe to the water supply valve of the machine, and the outlets are connected to the over-piston and front-piston cavity hydraulic cylinders of the water supply valve, and emergency relief valves, installed after Editor N. Shvydka Compiled by G.Paraev Tehred M. Khodanich Proofreader V. But ha Order 5730/2 Circulation 628 Subscription of the USSR State Committee for Inventions and Discoveries. 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, Projecto st., 4 Consequently, in the impulse line of protection of the machine, connected at one end with the pipeline of the machine, and at the other with the pressure input of the hydraulic transducer, as well as pressure indicators in the pipeline of the machine and the impulse line, in order to increase the reliability of control and protection, the device 0 is equipped with a three-way hydraulically controlled valve having a drain hole and installed between one of the outlets of the hydraulic switch and the piston-piston cavity of the hydraulic cylinder, and the prog- ram 5 of the frame driven by a diaphragm actuator of spring-loaded cams, kinematically associated with the electromagnet and drain valve rods, as well as with an additional drain valve stem connected to the drain hole of the three-way hydraulically controlled valve. five . 2. The device according to claim 1, that is, that it is equipped with a hydroprotection mechanism, made. . in the form of a programmed frame-block installed on the choke with the possibility of turning an additional cam, kinematically connected with the rod of the electromagnet and driven by an actuator connected to the hydraulic input 5 of the hydraulic switch and consisting of two elastic chambers connected to each other by two counter-connected check valves .