RU2297759C2 - Hydraulic system for emergency protection of multi-tower sprinkling machine - Google Patents

Abstract

FIELD: agricultural engineering, in particular, system for automatic protection and controlling of self-propelled multi-tower sprinkling machines.

SUBSTANCE: hydraulic system has locking device equipped with hydraulic drive and positioned at entrance end of machine, controllable hydraulic relay connected to control pipe extending through each tower and connected to hydraulic relay control unit and through narrowing device to pressure pipeline, return valve, normally open locking valves and actuating devices with tower position sensors disposed on rods which are fixed on housing bars of synchronization mechanism for intermediate supporting carts, hydraulically controlled valve mounted in feeding line of hydraulic drive for terminating cart and hydraulically communicated with control pipe. Actuating devices are connected through inlet pipe unions with control pipe via normally open locking valve by means of T-pipe, and through outlet pipe union with atmosphere. Tower position sensors are formed from plates made of fluorinated plastic material and equipped with slot widening at its ends. Plates are fixed on rods of synchronization mechanism by means of bolt connection so that said plates are movable axially of rod. Silicone pipe positioned within slot is joined with inlet and outlet pipe unions rigidly fixed within housing of synchronization mechanism for intermediate towers. Hydraulic communication between narrowing device and pressure pipeline is provided through return valve.

EFFECT: simplified construction and enhanced reliability in operation.

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Description

The invention relates to agriculture, and in particular to a system for automatic protection and control of self-propelled multi-support sprinklers.

Known hydraulic emergency protection system of a multi-support sprinkler machine, including a locking member with a hydraulic actuator at the machine inlet, controlled by a hydraulic relay, a control pipe passing through all supports and connected to a hydraulic relay control unit, and through a narrowing device to a pressure pipeline, actuators with support position sensors, installed on the casings and rods of the synchronization mechanism of the intermediate support trolleys, a hydraulic valve located in the power line of the hydraulic drive of the last lying and hydraulically connected to the control tube (A.S. 1029921, class A01G 25/16; A.S. 1521403, class A01G 25/16; A.S. 1412663, class A01G 25/16; A.S. 1304786, class A01G 25/09; A.S. 1009344, class A01G 25/09; patent 2208310, class A01G 25/16; analogues).

The disadvantage of these designs is the complexity of the design of emergency protection actuators, consisting of a large number of parts: an actuating valve, a spring-loaded pendulum with a copier, located in the casing of the synchronization mechanism, support position sensors. As a result of this, failure of one of the units or parts leads to a decrease in the reliability of operation or to a complete failure of the protection system as a whole. The execution of executive valves made of non-ferrous metal leads not only to a rise in the cost of the structure, but also to looting, and therefore the operation of the machine becomes difficult in automatic operation. In addition, when a power outage occurs, in the case of a reverse slope of the pressure pipe, the control tube is emptied of water, and therefore the air that fills does not make it possible to automatically start the serviceable machine when the pump station is restarted.

All this indicates a low reliability in the work of the considered designs and requires the solution of the noted shortcomings.

Another hydraulic emergency protection system for a multi-support sprinkler is known, including a locking member with a hydraulic actuator at the inlet of the machine, controlled by a hydraulic relay, connected to a control tube passing through all supports and connected to the end of the machine pipe through a non-return valve and an adjustable throttle, control actuators installed in series on the tube valves interacting with the position sensor of the supports, a hydraulic valve connecting the pipeline to the control tube, the actuator of which Shchen hydraulic drive with the upper space of the valve plug, but before actuating control valves in the control tube set normally open stopcocks (AS 1386116, cl A01G 25/16;. prototype).

Significant disadvantages are the complexity of the design of the actuator and low reliability.

The technical task of the invention is to simplify the design and increase reliability.

The task is achieved in that the actuators are connected by input fittings to the control tube through a normally open shut-off valve using a tee, and by output with an atmosphere, while the position sensors of the supports are made in the form of fluorine-containing plastic plates having a slot with expanding sizes at its ends mounted on the rods of the synchronization mechanism using a bolted connection and the ability to move along the axis of the rod, moreover, in the slot is a silicone tube connected to the inlet m and outlet fittings, rigidly fixed in the housing intermediate supports synchronization mechanism, besides hydraulic connection orifice to the discharge conduit via the check valve.

Due to the new interconnection of actuators of the protection system, the inlet nipples with the control tube through normally open shut-off valves with a tee, and the outlet with the atmosphere, i.e. actuators are connected to the control tube when they are connected to it in parallel, whereas in the analogue and prototype actuators are installed directly in the line of the control tube that connects them in a serial chain, it is possible in the proposed solution to significantly simplify the design of actuators, reducing the number of nodes and parts in comparison with analogues and prototype.

The design of the position sensors of the supports in the form of plates made of fluorine-containing plastic, having a slot with expanding sizes at its ends, mounted on the rods of the synchronization mechanism using a bolt connection and the ability to move along the axis of the rod, allows not only to exclude nodes and parts on each trolley (two stops , a spring-loaded pendulum with a copier), but it will also simplify the operation of setting up the protection system to operate in comparison with analogues and prototype.

The placement of the silicone tube connected to the inlet and outlet nozzles, rigidly fixed in the casing of the mechanism of synchronization of intermediate supports, will eliminate the complex and expensive part - the Executive valve used in analogues and prototype.

Hydraulic connection of the narrowing device with the pressure pipe through the non-return valve will significantly increase the reliability of the system when the pump station stops during the restart, ensuring the reliability of the automatic start-up of serviceable machines, which cannot be avoided either in the analogs or in the prototype when the pump station is biased .

Thus, the new connection and the relative position of the nodes and parts, as well as the new design of the individual elements, will make it possible to obtain a new positive effect in comparison with analogues and the prototype - simplifying the design and increasing the reliability of the hydraulic emergency protection system of the multi-support sprinkler.

Figure 1 presents a General diagram of a hydraulic emergency protection system of a multi-support sprinkler.

Figure 2 is a side view of the actuator.

Figure 3 is a section along aa.

Figure 4 - view B.

The hydraulic emergency protection system of the multi-support sprinkler includes a shut-off element 1 with a hydraulic actuator 2 at the inlet of the machine, controlled by a hydraulic relay 3, connected to a control pipe 4 passing through all supports and connected to a control unit 5 of a hydraulic relay 3, and through a constriction device 6 to a pressure pipe 7 , check valve 8, normally open shut-off valves 9 and actuators 10 with sensors 11 of the position of the supports mounted on the casings 12 and the rods 13 of the synchronization mechanism of the intermediate support trolleys, hyd a controlled valve 14 installed in the power line of the hydraulic actuator 15 of the last truck and hydraulically connected to the control tube 4, actuators 10 connected by inlet fittings 16 to the control tube 4 through a normally open shut-off valve 9 using a tee, and the outlet 17 - with the atmosphere, this sensors 11 position of the supports are made in the form of plates of fluorine-containing plastic having a slot 18 with expanding dimensions at its ends, mounted on the rods 13 of the synchronization mechanism using a bolted connection 19 the ability to move along the axis of the rod 13, and in the slot 18 there is a silicone tube 20, articulated with the input 16 and output 17 fittings rigidly fixed in the casing 12 of the synchronization mechanism of the intermediate supports, in addition, the hydraulic connection of the tapering device 6 with the pressure pipe 7 is through a check valve 8.

The hydraulic emergency protection system of the multi-support sprinkler operates as follows.

In the event of an emergency on the intermediate support trolley, the rod 13 of the synchronization mechanism is shifted forward or backward (lagging, advancing the trolley). As a result of this, the silicone tube 20, sliding in the slot 18, falls into an expanded place at the end of the slot 18, which leads to its depressurization under the action of pressure coming from the tube 4 through the open valve 9, and connection with the atmosphere.

This causes a pressure drop in the control tube 4 and the closing of the hydraulic valve 14. The machine stops, excluding further curvature of the water supply belt and damage to the machine.

Simultaneously with the machine stopping, the control unit 5 of the hydraulic relay 3 is triggered, causing the closure of the shut-off element 1 by means of the hydraulic actuator 2 in a time that excludes a hydraulic shock in the pressure pipe 7.

After eliminating the malfunction of the trolley, the operator transfers the crane 9 on this trolley to the "closed" position. This provides a rise in pressure in the tube 4, the opening of the hydraulic valve 14 and the switching of the control unit 5 of the hydraulic relay 3.

As a result of this, the valve 1 using the hydraulic actuator 2 smoothly opens and fills the water supply line of the machines with water. The machine starts up.

As the machine operates, the emergency truck is aligned with the longitudinal axis of the machine’s pipeline. This leads to the movement of the rod 13 of the synchronization mechanism to its original position, in connection with which the silicone tube 20 returns from the expanded part of the slot 18 to its narrow part, which causes it to overlap, i.e. her connection with the atmosphere ceases.

After aligning the longitudinal axis of the pipeline of the machine, the operator puts the valve 9 in the "open" position. The machine continues to operate in automatic mode.

When the pumping station is stopped due to the placement of the check valve 8 between the pressure pipe 7 and the restriction device 8, the outflow of water from the control pipe 4 is excluded, even with a reverse bias of the pressure network, which ensures that the pump station is smoothly filled with water (without water hammer) and is automatically switched on to work.

Using the proposed technical solution will reduce the cost of the protection kit by 5-10%, increase operational reliability by 10-15%.

Claims (1)

Hydraulic emergency protection system of a multi-support sprinkler, including a shut-off element with a hydraulic actuator at the machine inlet, controlled by a hydraulic relay, connected to a control pipe passing through all supports and connected to a hydraulic relay control unit, and through a constriction device to a pressure pipe, a non-return valve, normally open shut-off valves cranes and actuators with support position sensors mounted on the casings and rods of the synchronization mechanism of the intermediate support trolleys, hydraulically controlled to an apan installed in the power line of the hydraulic drive of the last bogie and hydraulically connected to the control tube, characterized in that the actuators are connected by input fittings to the control tube through a normally open shut-off valve using a tee, and by the output - with the atmosphere, while the position sensors of the supports are made in in the form of fluorine-containing plastic plates having a slot with expanding sizes at its ends, fixed to the rods of the synchronization mechanism using a bolted connection and the possibility of movements along the axis of the rod, and in the slot there is a silicone tube connected with the inlet and outlet fittings rigidly fixed in the casing of the synchronization mechanism of the intermediate supports, in addition, the hydraulic connection of the tapering device with the pressure pipe is carried out through a non-return valve.

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