EP1680604A1 - A selecting and directing arrangement - Google Patents

A selecting and directing arrangement

Info

Publication number
EP1680604A1
EP1680604A1 EP04775531A EP04775531A EP1680604A1 EP 1680604 A1 EP1680604 A1 EP 1680604A1 EP 04775531 A EP04775531 A EP 04775531A EP 04775531 A EP04775531 A EP 04775531A EP 1680604 A1 EP1680604 A1 EP 1680604A1
Authority
EP
European Patent Office
Prior art keywords
valve
outlets
directional valve
arrangement according
controlled
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP04775531A
Other languages
German (de)
English (en)
French (fr)
Inventor
Bengt Olsson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP1680604A1 publication Critical patent/EP1680604A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
    • F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
    • F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
    • F16K11/0655—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with flat slides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/0401—Valve members; Fluid interconnections therefor
    • F15B13/0402—Valve members; Fluid interconnections therefor for linearly sliding valves, e.g. spool valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/044—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by electrically-controlled means, e.g. solenoids, torque-motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
    • F15B13/08—Assemblies of units, each for the control of a single servomotor only

Definitions

  • the present invention relates to an arrangement for controlling and regulating hydraulic and pneumatic components, such as heavy-duty piston-cylinder devices and motors.
  • the invention is particularly suited for application within the broad field of mobile hydraulics, including, for instance, contractor-owned machines, forestry machines and agricultural machines.
  • One object of the present invention is to solve the aforesaid problems and to provide a rational, economic and flexible system that is based, as far as possible, on valve units of a simple and reliable kind that can be built together to provide different larger units for the selective control of a number of components.
  • an hydraulic system that includes an hydraulic pump and a selecting and directing arrangement according to the invention.
  • the directional valve has the form of a double 3-port valve.
  • all valves are of one and the same type affords constructional and storage advantages.
  • Figure 1 is a general view of an inventive selecting and directing arrangement, with first and second valves shown in a rest state;
  • Figure 2 is a view corresponding to figure 1 but with the first and second valves shown in an activated state;
  • Figure 3 illustrates the electrical components of a manoeuvring unit for controlling the arrangement illustrated in figures 1 and 2.
  • Figure 1 shows three mutually identical double 3-port valves referenced 10, 20 and 30 respectively. Such valves (also called 6/2-valves) are quite common.
  • the valves shown in figure 1 together form a selecting and directing arrangement, indicated generally by reference numeral 1.
  • the reference numerals used to identify the same part of respective valves differ solely by the first digit, such that the component parts of the first valve 10 begin with the digit "1", the component parts of the second valve with the digit "2" and the component parts of the third valve with the digit "3". Solely the first valve 10 will be described in detail in the following text.
  • the first valve of the illustrated example comprises an upper and a lower housing part 11a, 1 lb, with three ports in each housing part, which include an inlet 12a and two outlets 13a, 14a in the upper housing part and an inlet 12b and two outlets 13b, 14b in the lower housing part.
  • the valve also includes a spring-biassed, electrically manoeuvred control rod 15 which includes sealing plugs 16a, 17a for respective outlets of the upper part, and sealing plugs 16b, 17b for respective outlets of the lower housing part.
  • the control rod is sealed in the walls of said housing parts.
  • the valve 10 has two states, these being a spring-held rest (shown in fig.l) in which the sealing plugs 16a, 16b carried by the control rod block respective outlets 13a and 13b, and an active state (shown in fig.2) in which the control rod is urged by a magnetic force against the force of the biasing spring, wherewith the seals or plugs 17a, 17b plug respective outlets 14a and 14b.
  • the outlets 13a, 13b are thus open in this latter state of the valve.
  • the upper inlet 12a of the first valve 10 is coupled to a pressure source, such as to a hydraulic pump 2 of a tractor (not shown), whereas the lower inlet 12b is coupled as a return line to the suction inlet of said pump 2, normally via a tank (not shown).
  • the outlets 13a and 14b of the first valve 10 are coupled to the lower inlet 22b of the second valve 20 via a T-pipe 19.
  • the outlets 13b and 14b of the first valve are coupled to the upper inlet 22a of the second valve via a T-pipe 18.
  • the outlets 14a and 13b mutually coupled by the pipe 18 are never open simultaneously. This also applies to the outlets 13a and 14b mutually coupled by the pipe 19. This results in the following function.
  • the hydraulic pressure is delivered from the hydraulic pump 2 to the upper inlet 22a of the second valve 20 and the lower inlet 22b is connected with the return line.
  • the reverse function is obtained when the control rod 15 is moved to its lower position, in other words the hydraulic flow is transferred to the lower inlet 22b of the second valve via the first valve, wherewith the upper inlet 22a connects with the return line.
  • the first valve 10 functions as a directional valve which chooses the direction of the hydraulic flow from the hydraulic pump 2.
  • the outlets 24a, 24b of the second valve 20 are coupled to corresponding respective inlets 32a and 32b on the third valve 30, via respective pipes 28 and 29.
  • the second outlets 23a and 23b are coupled to respective hydraulic connections 42a and 42b on a first double-acting piston- cylinder device 40 via pipes 41a, 41b, wherein the piston-cylinder device 40 shall be controlled by means of the selecting and directing arrangement 1.
  • the outlets 33a and 33b of the third valve 30 are connected via respective pipes 51a and 51b to respective hydraulic connections 52a and 52b on a second double-acting piston-cylinder device 50 to be controlled.
  • the second and third valves 20, 30 function as selection valves with which, upon activation, it is elected to connect a respective selection valve to a respective load 40 or 50.
  • a pipe 38 is provided between the outlets 34a and 34b of the third valve 30.
  • Figure 1 shows the second valve 20 in a rest state, in which the sealing plugs 26a, 26b close the outlets 23a, 23b to which the first piston-cylinder device 40 is connected.
  • the first piston-cylinder remains stationary with the second valve in a rest state.
  • the second valve is activated (see fig. 2) the outlets 23a, 23b are open and fluid is allowed to flow through the second piston-cylinder device 40.
  • control with respect to the second valve enables the load 40 connected thereto to be engaged and disengaged.
  • the preferred embodiment includes double 3-port valves which are activated by an electromagnetic force. This enables the electric circuits required to actuate the electromagnet/electromagnets in the sequences desired for different functions and directions to be achieved with the aid of electric cables between tractor and implement and also with the aid of switches provided in the tractor.
  • One smart way of selecting a particular piston-cylinder device from among other devices and controlling said selected device in a directional sense is to provide a pair of press-button switches 43 a, 43b and 53 a, 53b respectively for each piston-cylinder device, as illustrated in figure 3, and operating said device in one direction by pressing the upper switch, and in an opposite direction by pressing the lower switch, and parking the piston rod in a selective position by refraining from pressing any of the switches.
  • the electrical operating unit 60 in figure 3 is thus designed so that when closing one switch of a switch pair intended for manoeuvring a load, both the first valve 10, i.e. the directional valve, and the selection valve relevant at that time are activated. On the other hand, when the other switch of said pair of switches is closed, only the selector valve relevant at that point in time is activated.
  • the electromagnets symbolised in figure 3 have the same order of sequence as the corresponding valves in figure 1 , as seen from left to right. Shown in broken lines in the electrical system of figure 3 is an extra electromagnet which is additional to the magnets required for the valves shown in figure 1.
  • the electrical system according to the concept of the present invention is also flexible and exchangeable. It will also be understood that the manoeuvring or operating unit shown in figure 3 is highly usable in practice, both in the illustrated or in an expanded construction.
  • the first valve 10 illustrated as a double 3-port valve may consist of any other general directional valve with which the direction of hydraulic pressure from the hydraulic pump 2 can be controlled.
  • the system illustrated in figure 1 can be further extended or expanded.
  • a fourth and further valve may be connected downstream of the third valve, these additional valves being adapted to control third and additional double-acting piston- cylinder devices.
  • double-acting piston-cylinder devices 40, 50 have been described as those components driven by the inventive arrangement, it will be understood that the inventive arrangement may also drive other types of loads, such as a reversible hydraulic motor.
  • the system described is adapted for driving a non-load-sensing pump.
  • load sensing systems that include a self regulating pump or in those cases when continuos circulatory pumping of the fluid can be affected by a separate circuit and supply valve which takes fluid from this upstream flow prior to the first valve, the outlets 34a, 34b may be plugged or some other function may be instigated or the fluid led to a tank via a separate return line.
  • double 3-port valves may have different configurations and need not necessarily comprise a physical combination of said housing parts.
  • separate housing parts each including an individual electromagnet with associated control rod for simultaneous activation are also considered to constitute double 3-port valves in accordance with the invention.
  • the electrical system shown in figure 3 is adapted for the system illustrated in figures 1 and 2. Naturally, this electrical system is also flexible and exchangeable in accordance with the concept of the invention and can readily be supplemented by connecting more valves and loads. Such an extension including the addition of a further valve is shown in broken lines in figure 3.
  • the manoeuvring unit shown in figure 3 is highly usable in practice, either in its illustrated state or in an expanded state.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Multiple-Way Valves (AREA)

Abstract

A lock system (100) is owned by a lock system owner and comprises a management computer (110) connected to a plurality of door access control units (120). A method of configuring this system comprises the following steps: installing in the door access control units a first certificate issued by a manufacturer (10) of the lock system; providing at the management computer (110) a second certificate issued by the lock system owner and signed by the manufacturer; transmitting from the management computer to a first door access control unit of the door access units the signed second certificate together with a symmetric encryption key used by the lock system owner; installing by means of asymmetric encryption the second certificate at the first door access control unit after checking the authenticity of the signed second certificate; and establishing of symmetric encryption communication between the management computer and the first door access unit. Simple yet secure installation of the lock system is thereby achieved.
EP04775531A 2003-10-17 2004-10-12 A selecting and directing arrangement Withdrawn EP1680604A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0302743A SE0302743L (sv) 2003-10-17 2003-10-17 Väljar- och riktningsanordning
PCT/SE2004/001449 WO2005038267A1 (en) 2003-10-17 2004-10-12 A selecting and directing arrangement

Publications (1)

Publication Number Publication Date
EP1680604A1 true EP1680604A1 (en) 2006-07-19

Family

ID=29398755

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04775531A Withdrawn EP1680604A1 (en) 2003-10-17 2004-10-12 A selecting and directing arrangement

Country Status (3)

Country Link
EP (1) EP1680604A1 (sv)
SE (1) SE0302743L (sv)
WO (1) WO2005038267A1 (sv)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2481933A3 (en) * 2011-01-27 2016-10-12 Bengt Olsson Valve arrangement

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2203713A1 (de) * 1972-01-27 1973-08-09 Weyhausen Kg Maschf H Schaltung fuer hydrostatisch betriebene arbeitsvorrichtungen
US4186771A (en) * 1977-11-03 1980-02-05 Sanyo Kiki Kabushiki Kaisha Hydraulic control apparatus

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2005038267A1 *

Also Published As

Publication number Publication date
SE524901C2 (sv) 2004-10-19
SE0302743D0 (sv) 2003-10-17
SE0302743L (sv) 2004-10-19
WO2005038267A1 (en) 2005-04-28

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