EP1633987B1 - Support leg valve - Google Patents
Support leg valve Download PDFInfo
- Publication number
- EP1633987B1 EP1633987B1 EP04749000A EP04749000A EP1633987B1 EP 1633987 B1 EP1633987 B1 EP 1633987B1 EP 04749000 A EP04749000 A EP 04749000A EP 04749000 A EP04749000 A EP 04749000A EP 1633987 B1 EP1633987 B1 EP 1633987B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- consumer
- flow
- priority
- chamber
- 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.)
- Expired - Lifetime
Links
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 7
- 230000001105 regulatory effect Effects 0.000 claims abstract description 5
- 238000006073 displacement reaction Methods 0.000 description 8
- 230000001276 controlling effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
Images
Classifications
-
- 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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/161—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load
- F15B11/162—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load for giving priority to particular servomotors or users
-
- 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
- F15B13/022—Flow-dividers; Priority 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/2053—Type of pump
- F15B2211/20546—Type of pump variable capacity
- F15B2211/20553—Type of pump variable capacity with pilot circuit, e.g. for controlling a swash plate
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/30—Directional control
- F15B2211/31—Directional control characterised by the positions of the valve element
- F15B2211/3105—Neutral or centre positions
- F15B2211/3116—Neutral or centre positions the pump port being open in the centre position, e.g. so-called open centre
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/40—Flow control
- F15B2211/405—Flow control characterised by the type of flow control means or valve
- F15B2211/40515—Flow control characterised by the type of flow control means or valve with variable throttles or orifices
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/40—Flow control
- F15B2211/42—Flow control characterised by the type of actuation
- F15B2211/428—Flow control characterised by the type of actuation actuated by fluid pressure
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/40—Flow control
- F15B2211/45—Control of bleed-off flow, e.g. control of bypass flow to the return line
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/605—Load sensing circuits
- F15B2211/6051—Load sensing circuits having valve means between output member and the load sensing circuit
- F15B2211/6054—Load sensing circuits having valve means between output member and the load sensing circuit using shuttle 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
- F15B2211/7142—Multiple output members, e.g. multiple hydraulic motors or cylinders the output members being arranged in multiple groups
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/78—Control of multiple output members
- F15B2211/781—Control of multiple output members one or more output members having priority
Definitions
- the present invention concerns a hydraulic valve with integrated priority valve, especially a support leg valve on a truck-mounted timber crane, according to the preamble to claim 1.
- loading is prepared by lowering a pair of support legs located on one side of the cargo space to the ground which can be extended or contracted telescopically in order to obtain a horizontal position of the cargo space.
- the support legs are used to stabilise the part of the chassis that contains the cargo space, e.g. a truck or its trailer. Without stabilisation, the chassis part may lean in the direction of the load in the crane and impair control of the loading process resulting in a longer working time.
- the valve that controls the movement of the support leg is used for a brief period before operating the crane. Subsequently, the support leg must be stable in its lowered position.
- Today's hydraulic systems involve either unreasonably costly valves with complicated hose arrangements or unwanted movements of the support legs. Described below are some of the most common types of systems used on truck mounted timber cranes for operating support legs.
- the support leg valve is often coupled in series with the cock and comprises one open centre valve and is first in the series. This means the flow of hydraulic oil to the crane's functions flows first through the support leg valve, which is consequently always pressurised.
- the support leg valve can also be connected in parallel with the cock via a separate priority valve.
- the support leg valve is a valve with closed centre arranged with an outer pilot line through which a pilot pressure flows to the priority valve regulating the flow.
- Another variant is to connect the support leg valve in parallel with a cock via an external pilot line with a load sensing pressure.
- the pilot line is arranged with a non-return valve to lead the load sensing pressure from the support leg valve to a shunt valve arranged in the cock.
- the support leg valve is a valve with closed centre. Both of these couplings involve a relatively costly arrangement and require relatively complicated hose arrangements in relation to the intended purpose.
- a further method of solving problems that arise in conjunction with support leg functions is to use a pump with variable displacement and parallel couple the valves via a switch valve regulated by the driver.
- the support leg valve is then often a load sensing valve with closed centre.
- One disadvantage is that the valve controlling the support leg is constantly under pressure when operating the crane, which may give unwanted movements of the support leg due to the natural leakage inside the slide valves.
- This problem can be solved by fitting a separate priority valve in the system with an output port to the support leg valve and a port to the cock.
- the priority valve is controlled by a signal from the support leg valve, which is often achieved through a pilot line giving a pilot flow from the support leg valve to the priority valve.
- One object of the present invention is to achieve a valve for operating principally the support legs of a timber crane mounted on a truck and also the control of, for example, moving the driver's cab or log carriages in a simple and cheap way without complicated hose arrangements or additional valves.
- Another object is to be able to use the arrangement together with a hydraulic pump with either variable or fixed displacement.
- the support leg valve comprising a one-piece unit with integrated priority valve and control valves with closed centres, the control valves regulating the flow via a signal pressure through a passage in the housing to the priority valve.
- a valve according to the invention comprises a one-piece valve housing 1 with an inlet port 2 connected to a hydraulic pump (P) with fixed or variable displacement, an outlet port 3 connected to a hydraulic tank (T), an outlet port 4 connected to the valve 5:1 controlling the functions of a consumer, such as a crane, and, in this embodiment, outlets to four consumers 5:2a - 5:2d with four identical control valves 6 a-d for controlling support legs, carriages and similar functions.
- the valve can be adapted to the demands placed on its functions in addition to, for example, support legs and carriages, through several control valves being able to be coupled together with the valve housing 1.
- the inlet port 2 is coupled to a priority valve 7 integrated in the valve housing 1 in which a spring-loaded slide 8, called the priority slide, is located.
- a first chamber 9 for building up hydraulic pressure from the inlet port 2.
- a second chamber 10 To the other end of the slide is arranged a second chamber 10.
- the second chamber 10 is connected to load sensing pressure via a passage 11 from the control valve slides 6 a-d.
- a spring 12 a coil spring for instance, with one end resting against the inside of the chamber 12 and the other end against the valve housing. Through the force of the spring 12, the slide 8 is pressed towards the first chamber 9, i.e. in the direction of arrow A, to a first end position.
- the inlet port 2 is in connection via the priority valve 7 with the control valves 6 a-d via a passage 13 with a first restriction 14.
- the load sensing pressure passage 11 is arranged with a connection to the tank T via a passage 15 with a second restriction 16.
- the slides in the control valves 6 a-d arranged with a first flow groove 17 of increasing size to successively open the flow path to one of the consumers 5-2a - 5:2d, for instance a support leg.
- the slides of the control valves 6 a-d are also equipped with a second flow groove 18, which is in connection with the second chamber 10 in the priority valve 7.
- inlet 2 When the system is pressurised, inlet 2 will be in connection with the passage 13.
- the pump P When the pump P is started and the control valves 6a-6d are not operated, the flow of hydraulic oil is led in from the pump P via the inlet 2 to the first chamber 9 in the priority valve 7, whereby the pressure in chamber 9 will rise.
- the pressure existing in the second chamber 10 from the load sensing pressure passage 11 is simultaneously drained to the tank via the second restriction 16.
- the priority slide 8 When the pressure in the first chamber 9 becomes higher than the spring force from the spring in the second chamber 10, the priority slide 8 will be displaced to a second end position and the inlet 2 connection with passage 13 will be closed. This will connect the inlet 2 to the port 4 connected to the valve 5:1, which controls the crane functions, whereby the entire pump flow will go to the crane valve 5:1.
- a valve When a control valve 6a-6d is operated, i.e. the valve controlling the functions of consumer 5:2a-5:2d, for instance the support leg, a valve will be activated, i.e. control valve slide 6a will be displaced in the direction of the arrow A in figure 1 .
- the flow groove 17 arranged in the slide will open successively, whereby the flow of hydraulic oil to the support leg will gradually increase.
- the second flow groove 18 will open successively to gradually increase the flow to the passage 11 for the load sensing pressure. This will mean the pressure in the second chamber 10 will rise, whereby the priority slide 8 will be displaced to centre position where the pressure in passage 13 corresponds to the total pressure of the spring 12 and the pressure in the second chamber 10.
- the consumer 5:2a-5:2d in this example the support leg, can be operated in the desired manner with the requisite flow irrespective of the pressure that is needed, while the residual flow passes to the cock 5 via the outlet port 4.
- a drain 19 has been arranged to the tank T at the second restriction 16.
- the drain 19 delivers a certain flow from the second flow groove 18 in the control valve slide 6a-6d to the tank T and thereby the desired drop in pressure before it reaches the second chamber 10.
- the control valves slides 6a-6d are designed so that the drain 19 will close at the second restriction 16 for large valve actuations, whereby the first restriction 14 has the greatest effect as the main flow passes through the passage 13.
- the size of this first restriction 14 can be adapted to provide a limited maximum flow for large valve actuations. This can be used to provide a smooth control of the consumers 5:2a -5:2d without any sudden movements.
- the priority slide 8 regulates the drop in pressure across the restriction 14 to a constant value, whereby this maximum flow becomes independent from the load, i.e. the support leg in this example will maintain a constant speed irrespective of the load.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
- Multiple-Way Valves (AREA)
- Servomotors (AREA)
- Pens And Brushes (AREA)
- Forging (AREA)
- Check Valves (AREA)
Abstract
Description
- The present invention concerns a hydraulic valve with integrated priority valve, especially a support leg valve on a truck-mounted timber crane, according to the preamble to claim 1.
- When loading timber using a timber crane mounted on a truck, loading is prepared by lowering a pair of support legs located on one side of the cargo space to the ground which can be extended or contracted telescopically in order to obtain a horizontal position of the cargo space. The support legs are used to stabilise the part of the chassis that contains the cargo space, e.g. a truck or its trailer. Without stabilisation, the chassis part may lean in the direction of the load in the crane and impair control of the loading process resulting in a longer working time. The valve that controls the movement of the support leg is used for a brief period before operating the crane. Subsequently, the support leg must be stable in its lowered position. Today's hydraulic systems involve either unreasonably costly valves with complicated hose arrangements or unwanted movements of the support legs. Described below are some of the most common types of systems used on truck mounted timber cranes for operating support legs.
- Included in today's hydraulic systems are often one or two hydraulic pumps with fixed displacement or one larger pump with variable displacement. In the case of pumps with fixed displacement, the support leg valve is often coupled in series with the cock and comprises one open centre valve and is first in the series. This means the flow of hydraulic oil to the crane's functions flows first through the support leg valve, which is consequently always pressurised.
- The support leg valve can also be connected in parallel with the cock via a separate priority valve. In this case, the support leg valve is a valve with closed centre arranged with an outer pilot line through which a pilot pressure flows to the priority valve regulating the flow. Another variant is to connect the support leg valve in parallel with a cock via an external pilot line with a load sensing pressure. The pilot line is arranged with a non-return valve to lead the load sensing pressure from the support leg valve to a shunt valve arranged in the cock. Also in this case, the support leg valve is a valve with closed centre. Both of these couplings involve a relatively costly arrangement and require relatively complicated hose arrangements in relation to the intended purpose.
- A further method of solving problems that arise in conjunction with support leg functions is to use a pump with variable displacement and parallel couple the valves via a switch valve regulated by the driver. The support leg valve is then often a load sensing valve with closed centre. One disadvantage is that the valve controlling the support leg is constantly under pressure when operating the crane, which may give unwanted movements of the support leg due to the natural leakage inside the slide valves. This problem can be solved by fitting a separate priority valve in the system with an output port to the support leg valve and a port to the cock. The priority valve is controlled by a signal from the support leg valve, which is often achieved through a pilot line giving a pilot flow from the support leg valve to the priority valve. This solution also gives a relatively complicated and costly valve in relation to the simple functions of a support leg valve. The advantage with parallel connected valves via a separate priority valve is that the support leg around is not under pressure while the cock is being operated. The pressure drop across the valves is also reduced. However, the disadvantage in the form of the expensive and complicated valves with extra hose arrangements remains. Furthermore, special coupling procedures are needed depending on the type of pump to be used.
- One object of the present invention is to achieve a valve for operating principally the support legs of a timber crane mounted on a truck and also the control of, for example, moving the driver's cab or log carriages in a simple and cheap way without complicated hose arrangements or additional valves. Another object is to be able to use the arrangement together with a hydraulic pump with either variable or fixed displacement.
- These objects are achieved with the support leg valve comprising a one-piece unit with integrated priority valve and control valves with closed centres, the control valves regulating the flow via a signal pressure through a passage in the housing to the priority valve.
- The present invention will be described more fully in the following with reference being made to the attached drawings, which illustrate one example of a selected embodiment, of which:
-
fig. 1 shows a cross- section through a valve according to the invention coupled to a pump with fixed displacement and -
fig. 2 shows a cross-section through a valve according to the invention coupled to a pump with variable displacement. - With reference to the figures, a valve according to the invention comprises a one-
piece valve housing 1 with aninlet port 2 connected to a hydraulic pump (P) with fixed or variable displacement, anoutlet port 3 connected to a hydraulic tank (T), anoutlet port 4 connected to the valve 5:1 controlling the functions of a consumer, such as a crane, and, in this embodiment, outlets to four consumers 5:2a - 5:2d with four identical control valves 6 a-d for controlling support legs, carriages and similar functions. The valve can be adapted to the demands placed on its functions in addition to, for example, support legs and carriages, through several control valves being able to be coupled together with thevalve housing 1. Theinlet port 2 is coupled to apriority valve 7 integrated in thevalve housing 1 in which a spring-loadedslide 8, called the priority slide, is located. To one end of theslide 8 is arranged afirst chamber 9 for building up hydraulic pressure from theinlet port 2. To the other end of the slide is arranged asecond chamber 10. Thesecond chamber 10 is connected to load sensing pressure via apassage 11 from the control valve slides 6 a-d. In thesecond chamber 10 is arranged aspring 12, a coil spring for instance, with one end resting against the inside of thechamber 12 and the other end against the valve housing. Through the force of thespring 12, theslide 8 is pressed towards thefirst chamber 9, i.e. in the direction of arrow A, to a first end position. - The
inlet port 2 is in connection via thepriority valve 7 with the control valves 6 a-d via apassage 13 with afirst restriction 14. The loadsensing pressure passage 11 is arranged with a connection to the tank T via apassage 15 with asecond restriction 16. The slides in the control valves 6 a-d arranged with afirst flow groove 17 of increasing size to successively open the flow path to one of the consumers 5-2a - 5:2d, for instance a support leg. The slides of the control valves 6 a-d are also equipped with asecond flow groove 18, which is in connection with thesecond chamber 10 in thepriority valve 7. - When the system is pressurised,
inlet 2 will be in connection with thepassage 13. When the pump P is started and thecontrol valves 6a-6d are not operated, the flow of hydraulic oil is led in from the pump P via theinlet 2 to thefirst chamber 9 in thepriority valve 7, whereby the pressure inchamber 9 will rise. The pressure existing in thesecond chamber 10 from the loadsensing pressure passage 11 is simultaneously drained to the tank via thesecond restriction 16. When the pressure in thefirst chamber 9 becomes higher than the spring force from the spring in thesecond chamber 10, thepriority slide 8 will be displaced to a second end position and theinlet 2 connection withpassage 13 will be closed. This will connect theinlet 2 to theport 4 connected to the valve 5:1, which controls the crane functions, whereby the entire pump flow will go to the crane valve 5:1. - When a
control valve 6a-6d is operated, i.e. the valve controlling the functions of consumer 5:2a-5:2d, for instance the support leg, a valve will be activated, i.e.control valve slide 6a will be displaced in the direction of the arrow A infigure 1 . Theflow groove 17 arranged in the slide will open successively, whereby the flow of hydraulic oil to the support leg will gradually increase. Meanwhile, thesecond flow groove 18 will open successively to gradually increase the flow to thepassage 11 for the load sensing pressure. This will mean the pressure in thesecond chamber 10 will rise, whereby thepriority slide 8 will be displaced to centre position where the pressure inpassage 13 corresponds to the total pressure of thespring 12 and the pressure in thesecond chamber 10. With thepriority slide 8 in this position, the consumer 5:2a-5:2d, in this example the support leg, can be operated in the desired manner with the requisite flow irrespective of the pressure that is needed, while the residual flow passes to thecock 5 via theoutlet port 4. - To prevent the pressure rising directly to maximum level in
passage 11 for the load sensing pressure during small valve actuations, adrain 19 has been arranged to the tank T at thesecond restriction 16. Thedrain 19 delivers a certain flow from thesecond flow groove 18 in thecontrol valve slide 6a-6d to the tank T and thereby the desired drop in pressure before it reaches thesecond chamber 10. - The control valves slides 6a-6d are designed so that the
drain 19 will close at thesecond restriction 16 for large valve actuations, whereby thefirst restriction 14 has the greatest effect as the main flow passes through thepassage 13. The size of thisfirst restriction 14 can be adapted to provide a limited maximum flow for large valve actuations. This can be used to provide a smooth control of the consumers 5:2a -5:2d without any sudden movements. Thepriority slide 8 regulates the drop in pressure across therestriction 14 to a constant value, whereby this maximum flow becomes independent from the load, i.e. the support leg in this example will maintain a constant speed irrespective of the load. - The present invention is not limited to the above description and as illustrated in the drawings but can be changed and modified in a number of different ways within the framework of the idea of invention specified in the following claims.
Claims (8)
- Valve housing (1) for distributing the flow of hydraulic oil generated from a unit (P) to a first (5:1) and a second (5:2a-5:2d) consumer with different priorities, comprising inlet (2) to the first consumer (5:1) and the second consumer (5:2a-5:2d) control valves (6a-d) and an outlet (3) in connection with a hydraulic tank (T), charac terised in that it comprises a housing (1) containing a means of priority (7) arranged between the first consumer (5:1) and the second consumer (5:2a - 5:2d) control valve (6a-d), a means (18) in the second consumer (5:2a - 5:2d) control valve (6a-d) for delivering a signal flow to the means of priority (7) via a passage (11) arranged in the housing, regulator (8) for regulating the flow to the first consumer (5:1) and the second consumer (5:2a - 5:2d) control valve (6a-d) on the basis of the signal flow and a means (14,16) of attaining a drop in pressure of the signal flow when operating the second consumer (5:2a - 5:2d) control valve (6a-d).
- Valve housing according to claim 1, whereby the regulator (8) comprises a moving priority slide arranged in the means of priority (7) with a first chamber (9) for receiving a flow of hydraulic oil and a second chamber (10) for receiving a signal flow.
- Valve housing according to claim 2, whereby the second chamber (10) comprises a spring (12) that keeps the priority slide in its first end position.
- Valve housing according to claims 2-3, whereby the priority slide is displaced to a second end position by the pressure from the flow of hydraulic oil in the first chamber (9).
- Valve housing according to any one of the previous claims, whereby the means (18) in the second consumer control valve for delivering a signal flow to the means of priority (7) comprises a flow groove for delivering a signal flow.
- Valve housing according to claim 5, whereby the flow groove opens successively to open a flow path via a passage (11) to the second chamber (10), whereby the priority slide is displaced to a central position.
- Valve housing according to any one of the previous claims, whereby the means (14,16) of attaining a drop in pressure comprises a first area reduction arranged in the passage (19) connecting the flow groove (18) to the tank (T).
- Valve housing according to claim 7, whereby the means (14, 16) of attaining a drop in pressure of the signal flow comprises a second area reduction in a passage (13) between the priority valve (7) and the control valve (6a-d).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE0301777A SE525355C2 (en) | 2003-06-19 | 2003-06-19 | Outriggers valve |
PCT/SE2004/000951 WO2004111467A1 (en) | 2003-06-19 | 2004-06-16 | Support leg valve |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1633987A1 EP1633987A1 (en) | 2006-03-15 |
EP1633987B1 true EP1633987B1 (en) | 2012-03-07 |
Family
ID=27607343
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04749000A Expired - Lifetime EP1633987B1 (en) | 2003-06-19 | 2004-06-16 | Support leg valve |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1633987B1 (en) |
CN (1) | CN100480517C (en) |
AT (1) | ATE548569T1 (en) |
SE (1) | SE525355C2 (en) |
WO (1) | WO2004111467A1 (en) |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1988006114A1 (en) * | 1987-02-19 | 1988-08-25 | Zahnradfabrik Friedrichshafen Ag | Hydraulic device with regulable pump |
CN2224944Y (en) * | 1994-01-24 | 1996-04-17 | 奉化豪发液压气动有限公司 | Hydraulic multi-channel switching valve |
IT234141Y1 (en) * | 1994-10-05 | 2000-02-23 | Velp Scient Srl | CONTROLLED STEAM FLOW DISTILLATION EQUIPMENT |
GB9425273D0 (en) * | 1994-12-14 | 1995-02-08 | Trinova Ltd | Hydraulic control system |
IT1292919B1 (en) * | 1997-05-13 | 1999-02-11 | Mita Oleodinamica Spa | DISTRIBUTOR FOR A CONTROLLED POSITION AND EFFORT HYDRAULIC LIFT FOR TRACTORS AND AGRICULTURAL MACHINES. |
CN1274810A (en) * | 1999-05-21 | 2000-11-29 | 株式会社岛津制作所 | Multi-valve device |
CN2504157Y (en) * | 2001-07-02 | 2002-08-07 | 温州市液压件厂 | Hydraulic multiroute valve of crane truck |
-
2003
- 2003-06-19 SE SE0301777A patent/SE525355C2/en not_active IP Right Cessation
-
2004
- 2004-06-16 WO PCT/SE2004/000951 patent/WO2004111467A1/en active Application Filing
- 2004-06-16 AT AT04749000T patent/ATE548569T1/en active
- 2004-06-16 EP EP04749000A patent/EP1633987B1/en not_active Expired - Lifetime
- 2004-06-16 CN CNB2004800170115A patent/CN100480517C/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
CN100480517C (en) | 2009-04-22 |
WO2004111467A1 (en) | 2004-12-23 |
ATE548569T1 (en) | 2012-03-15 |
EP1633987A1 (en) | 2006-03-15 |
SE525355C2 (en) | 2005-02-08 |
SE0301777D0 (en) | 2003-06-19 |
SE0301777L (en) | 2004-12-20 |
CN1809698A (en) | 2006-07-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US7448309B2 (en) | Hydraulic arrangement | |
US6644025B1 (en) | Control arrangement for at least two hydraulic consumers and pressure differential valve for said control arrangement | |
KR102023686B1 (en) | Pressure compensation unit | |
US20090142201A1 (en) | Hydraulic flow control system and method | |
EP0468944A1 (en) | An arrangement for controlling hydraulic motors | |
US7328646B2 (en) | Hydraulic valve arrangement | |
NO169503B (en) | HYDRAULIC CONTROL DEVICE FOR LEVEL ADJUSTMENT OF A TRAY | |
JPH0459483B2 (en) | ||
US9677575B2 (en) | Valve for valve assembly | |
CA1258419A (en) | Control device for a hydraulically operated consumer | |
CN102562694B (en) | Load-sensing regulating type hydrostatic drive system | |
EP2282064A2 (en) | Open center hydraulic system | |
JP3768192B2 (en) | Hydraulic control device | |
US5060475A (en) | Pilot control circuit for load sensing hydraulic systems | |
US4362089A (en) | Valve system | |
US4723409A (en) | Safety circuit for a hydraulic system | |
EP1633987B1 (en) | Support leg valve | |
US5127227A (en) | Hydraulic circuit apparatus for construction vehicles | |
EP1568892B1 (en) | Flow control apparatus for construction heavy equipment | |
US9752597B2 (en) | Metered fluid source connection to downstream functions in PCLS systems | |
EP0704623B1 (en) | Delivery control device for hydraulic pumps | |
US4683909A (en) | Reservoir loading valve with pressure protection of the reservoir circuit | |
CN113969911B (en) | Preselection valve, hydraulic valve assembly and hydraulic control unit | |
EP4148014B1 (en) | Device for controlled re-entry of a cylinder | |
US3612088A (en) | Throttling draft control valve |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20051205 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: HYDRAUTO VALVES AB |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: MARKLUND, MARTIN |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: NORDHYDRAULIC I SKELLEFTEA AB |
|
DAX | Request for extension of the european patent (deleted) | ||
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP Ref country code: AT Ref legal event code: REF Ref document number: 548569 Country of ref document: AT Kind code of ref document: T Effective date: 20120315 |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: FG4D |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R096 Ref document number: 602004036821 Country of ref document: DE Effective date: 20120503 |
|
REG | Reference to a national code |
Ref country code: NL Ref legal event code: VDEP Effective date: 20120307 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20120307 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20120307 Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20120608 |
|
REG | Reference to a national code |
Ref country code: AT Ref legal event code: MK05 Ref document number: 548569 Country of ref document: AT Kind code of ref document: T Effective date: 20120307 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: CY Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20120307 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: EE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20120307 Ref country code: SE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20120307 Ref country code: CZ Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20120307 Ref country code: SI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20120307 Ref country code: PL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20120307 Ref country code: RO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20120307 Ref country code: BE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20120307 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20120307 Ref country code: PT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20120709 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20120307 Ref country code: MC Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20120630 Ref country code: AT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20120307 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
26N | No opposition filed |
Effective date: 20121210 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20120616 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20120307 |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: MM4A |
|
REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20130228 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R097 Ref document number: 602004036821 Country of ref document: DE Effective date: 20121210 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 602004036821 Country of ref document: DE Effective date: 20130101 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20120702 Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20120616 Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20120630 Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20130101 Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20120618 Ref country code: IE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20120616 Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20120630 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BG Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20120607 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: TR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20120307 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20120616 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: HU Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20040616 |