JPS59170507A - Amplifying remote controller for hydraulic circuit - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an amplifying remote control device for hydraulic circuits of the type used in equipment, vehicles, civil engineering equipment, ships, etc.

It is well known that in oilfield circuits, control switching is typically performed with one or more distributors of the slip valve type. That is, all operator levers of the transducer are connected to the distributor by relatively long hydraulic conduits. Therefore, in some cases the length of the hydraulic circuit between the converter and the distributor can be quite large.

In a well-known type of remote control system, the disk 1
- the amount of oil required to shift the slide valve of the rebeater is arranged to circulate through the transducer in the conduit connecting the transducer to the disc 1 to the revie-coo;

Therefore, as the fluid circulates, load losses occur, resulting in increased control response times.

To minimize this loss, it is conceivable to increase the diameter of the conduit passage, but this would increase the amount of oil to be compressed. Therefore, the amount of line compression also increases, resulting in a disadvantage that the response time further increases. Therefore, a compromise must be made between the amount of compression and the load loss in order to maximize the control time.
However, whichever compromise is chosen, it is extremely rare for scales to satisfy the systems known today.

It is an object of the present invention to eliminate the drawbacks mentioned above and to provide a controlled and amplified remote control device of the type in which a very small amount of oil is circulated in the conduit for each pulse sent by the transducer. Here it is.

The device according to the invention consists of a hydraulic transducer connected by two conduits to each of the control chambers located at the two ends of the slide valve of the oil controller, and features of the invention A nominal pressure is supplied to each conduit between the transducer and the control chamber at the corresponding end of the distributor. The movable switching adjustment slide valve is configured to adjust the nominal pressure to initiate the desired operation of the distribution valve slide valve.

With this arrangement, the rather long conduit connecting the transducer to each pressure reducing valve has to transmit only the pressure caballus, and therefore the amount of oil transferred is advantageous. Each pressure reducing valve functions as a relay that acts on a corresponding end of the slide valve of the die resistor.

Next, the features of the present invention will be better understood from the description given with reference to the accompanying drawings.

In a previously known control circuit of the type shown in FIG. 1, an operator operates a control lever 1 of a hydraulic transducer 2.
This converter 2 receives all pressurized oil from a conduit 3 and is connected by a conduit 4 to a return tank 5.

The output of the converter 2 has two conduits 6, 7 which are respectively connected to the two ends of the slide valve of the distributor 8.

The conduit 6 is connected to a control chamber 9 corresponding to the left end of the slip valve of the gust distributor 8, and the conduit 7 is connected to a control chamber 10 corresponding to the right end.

In the case of remote control, i.e. the converter 2
The length of these conduits 6 and 7 increases when the repeater 8 is separated from the repeater 8, and the length of these conduits 6 and 7 increases. The amount of this will also increase.

In the case of the invention shown in FIG.
The pressure reducing valve 11 is inserted between the converter 2 and the control chamber 9 (and the inlet pipe 7 is inserted between the converter 2 and the control chamber 10).
Push in the pressure reducing valve 12 similar to 1. These pressure reducing valves 11
- 12 each has a pressurized oil supply section (13) and a return section 114i to the tank 15.

In order to simplify the explanation, the structure and operation of the valve 11 are as follows.
The explanation will be based on FIG. The structure of the valve 12 is the same as that of the valve 11, except that the valve 12 is mounted symmetrically to the left and right sides of the valve 11.

The fixed body 16 of the valve 11 has two inner throats 17 and 18 against which the high pressure intake member 13 is connected.
and a return member 14 to the tank are in communication with each other.

An annular projection 19 is provided between these throats 17 and 18, and the cylindrical slide valve 20 is configured to slide onto this projection 19 in an airtight manner. The cylindrical slide valve 20 has a peripheral edge 21 in its central part, and a radial passage 22 at its bottom.
It communicates with the axial blind hole 23 via.

At both ends of the slide valve 20, the control chamber 9.

Drive chambers 24 , which are connected to the transducer 2 by conduits 6 , are each formed by the body 16 .

Reference numerals 25 and 26 designate annular inner protrusions having the same inner diameter as the protrusion 19, thereby making the periphery of the sliding slide valve 20 airtight and sealing the throat portions 17 and 18 from the chamber 9.
・Can be isolated with respect to 24.

The axial length 27 of the four parts 21 is the same as or less than the axial length 28 of the protrusion 19.

In addition, the recess 21 is connected to the control room 9 through the passage 22 and the blind hole 23.
I am in constant communication with.

Next, the operation of the present invention will be explained.

When the operator operates the lever 1 of the transducer 2 to send a pressure pulse into the conduit 6, this pressure is immediately built up in the chamber 24. The pressure is applied to the slide valve 20 in the right direction in FIG.
As a result, the throat 17 and the recess 21 are brought into communication with each other. Therefore, the height 1 from the pressure intake member 13
]-The two forces pass through the passage 22 and the blind hole 23 into the chamber 9.

As a result, the slip valve of the distributor 8 is
9 Move in the direction shown.

As soon as the pressure in chamber 9 becomes equal to the pressure in chamber 24, pan valve 20 is in equilibrium. Additionally, when the pressure in the chamber 9 begins to increase, the slide valve 20 moves to the left, narrowing the gap between the four parts 21 and the corresponding edges of the protrusion 19.

When the pressure inside the chamber 9 further increases, the slide valve 20 of the pressure reducing valve moves further to the left, returning the chamber 9 to a state in communication with the conduit 14 via the recess 21 and the throat 18, which are in the state of being in the back-to-back state. Make it.

It will be appreciated that the device I/''i according to the invention has the advantage of significantly reducing the amount of oil circulated in the conduit 6 for shifting the slip valve of the distributor 8. Valve 1 and converter 2. (8) Reprint of specification (no change in content) The time is extremely good.

Furthermore, since the amount of oil required is small, converter 2
The passage cross section of the connecting conduits 6 and 7 between the pressure reducing valves 11 and 12 can be reduced. Thus, the amount of pressurized oil is reduced and, as a result, the amount of compression is also reduced, thereby reducing the response time of the device.

It should be noted that any value of pressure passing through the conduit 13' may be used as long as it is greater than the maximum value necessary to ensure the entire stroke of the slide valve 20.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a conventional type hydraulic control circuit. FIG. 2 is a schematic diagram of an oilfield circuit according to the present invention. FIG. 3 is an enlarged axial sectional view showing details of the pressure reducing valve according to the invention. Patent applicant Bunes Marel procedural amendment written form) April 16, 1980 Patent application No. 198178 2, title of invention Amplifying remote control device for hydraulic circuit 3, person making amendment 4, agent application in progress Name section of the representative of the patent applicant, item 7 of the specification
Remaining ~ January 11, 1980 (shipment date, January 31, 1980) Contents of amendment 8, list of attached documents (1) Application for correction, one original and one copy each (2)
Pages 7 to 10 of the specification 1 copy (3) Power of attorney and its translation 1 copy each (4) Corporate certificate and its translation 1 copy each (2) 1. Submit all proper application forms as attached. Masu. 2. Submit an engraving of pages 7 to 10 of the specification (with no changes to the contents) as attached. 3. Submit the power of attorney and its translation as attached. 4. Submit the corporate certificate and its translation as attached.

Claims (5)

[Claims] (1) Each of the control chambers located at both ends of the slide valve of the hydraulic distributor has a hydraulic transducer connected by two conduits, and the control chamber at the corresponding end of the distributor , between the transducers, for each conduit, a pressure reducing valve is inserted, which is supplied with the nominal pressure by the conduit, and a movable regulating switching slide valve adjusts the nominal pressure by pulses sent from the transducer; An amplification remote control device for a hydraulic circuit, characterized in that the adjusted pressure is sent to a corresponding control room, and the control room operates a slip valve of a distributor. (2) The long conduits that connect all the transducers to each pressure reducing valve only transmit pressure pulses, and the amount of oil transferred is extremely small. An amplifying remote control device for a hydraulic circuit as claimed in claim 1, characterized in that for the entire stroke of the valve there is considerably less air flow than is required in the chamber. (3) The pressure reducing valve is provided within its fixed body between a drive chamber connected to a corresponding conduit, a control chamber connected to a corresponding end of the slip valve of the distributor, and one end chamber. , (three annular inner protrusions forming two annular grooves therebetween; a nominal pressure intake member communicating with the throat and a slide valve that is freely slidable between the protrusions in an airtight manner; The amplification remote control device for a hydraulic circuit according to any one of claims (1) to (2), characterized in that it has a return tank and a member that communicates a fifth throat, that is, a groove. (4) Slip valve 1l-j: % A blind hole is left in the center, and the blind hole opens into the control chamber and connects to the bottom of the recess formed in the center of the circumference of the slide valve through a radial passage. The amplification remote control device for a hydraulic circuit according to claim (3), wherein the amplification remote control device is in communication with each other. (5) The width of the four parts is the same as or less than the width of the protruding part.
The amplification remote control device for a hydraulic circuit according to item 4).