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
  • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
• • 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
  • F15B13/0803—Modular units
  • F15B13/0832—Modular valves
  • F15B13/0842—Monoblock type valves, e.g. with multiple valve spools in a common housing
• • 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
  • F15B13/0803—Modular units
  • F15B13/0878—Assembly of modular units
  • F15B13/0896—Assembly of modular units using different types or sizes of 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
  • F15B13/06—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
  • F15B13/0803—Modular units
  • F15B13/0871—Channels for fluid
• • 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
  • F15B2013/002—Modular valves, i.e. consisting of an assembly of interchangeable components
  • F15B2013/006—Modular components with multiple uses, e.g. kits for either normally-open or normally-closed valves, interchangeable or reprogrammable manifolds

Definitions

• the invention relates to a hydraulic valve body which is adapted to be used for controlling actuators external of the body.
• the invention relates to a type of hydraulic valve that comprises said body.
• Hydraulic bodies are used, by controlling the valves included therein, to deliver a hydraulic fluid such as hydraulic oil in a desired manner to desired targets.
• Inlet ports included in a hydraulic valve body have hydraulic lines connected therewith and, respectively, hose fittings have hydraulic hoses connected therewith.
• Control and operation of rods present inside the body can be used for enabling hydraulic oil to proceed to specific hoses.
• Such control can be conducted in the way of electric, pneumatic or mechanical control.
• the hoses are occasionally subjected to pressure shocks with possible mishaps. The occurrence of mishaps is avoided by using safety valves as well as backpressure valves.
• FIG. 1 Prior Art
• the body comprises channels internal thereof, hose fittings (C1 -C6) for connecting actuators (E1 -E4), and hydraulic fluid inlet ports (P1 , P2).
• the body is further fitted with locations for control elements, such as for rods to be controlled from outside, for directing the fluid to a given hose fitting.
• the body also comprises locations for one or more safety valves to be accommodated therein, the housings of which are connected with a channel to a return port for hydraulic fluid arriving by way of the safety valve to be returned into a reservoir/pressure accumulator (the Applicant's valve body ⁇ 8312 ⁇ 4").
• One objective of the invention is to present a type of hydraulic valve body which enables prior art-related drawbacks to be eliminated or at least reduced.
• the invention endeavors to provide such a single hydraulic valve body which does not require hose arrangements between various valves.
• Another objective is to simplify the installation of valves as well as components relating thereto, as well as to present such a hydraulic valve body which is simple in construction and which single valve body is capable of being configured so as to accomplish at least the actions 1/1 , 1/2, 1/3, 1/4, 2/1 , 2/2, 2/3, and 3/1 , 3/3, 3/3 as well as 3/4 stated above (and described more specifically elsewhere in this document).
• One objective of the invention is to present such a hydraulic valve body which is adaptable for controlling several types of actuators, yet with a number of body parts as few as possible.
• the hydraulic valve body as presented in claim 1 .
• the hydraulic valve body according to the invention is characterized by what is presented in claim 1 directed to a hydraulic valve body.
• the hydraulic valve according to the invention is characterized by what is presented in claim 18 directed to a hydraulic valve.
• the hydraulic valve body comprises two main ports for conveying a pressurized hydraulic fluid into the body's channel system and further out of the channel system. It should be noted that the hydraulic fluid can be delivered to either one of the main ports, whereby the other main port functions respectively as a return channel and vice versa, hence enabling two-way motions for actuators attachable to the body of the invention.
• the main port selections are carried out with control elements, for example valves, external of the body.
• control elements for example valves, external of the body.
• the invention is not limited to which type of actuators can be hooked up with the hydraulic valve body, but a few noteworthy examples of the actuators include for example cylinders, motors or reversible motors. These can be used for example for controlling a U-plow, a zoom plow, articulated plow, and components and blades of a blade snow shovel.
• the body comprises four outlet ports ⁇ C1+, C2+, C5+, C8+) for directing hydraulic fluid from the body's channel system further to actuators external of the body, as well as four respective inlet ports (C3-, C4-, C6-, C7-) for directing the hydraulic fluid from the actuators back into the body's channel system.
• the body's channel system is adapted to be configured for various flow circuits, such that the body comprises:
• the body also comprises a fourth channel (K4) provided in the body between the first outlet (C5+) and a third outlet (C1 +), said fourth channel (K4) being adapted to be openably closable for example by means of a plug (T4) placed in connection with said fourth channel.
• the body may further comprise a fifth channel (K5) provided in the body between a fourth outlet (C2+) the second main port (P2), said fifth channel (K5) being also adapted to be openably closable for example by means of a plug (T5) placed in connection with said fifth channel.
• the body has additionally fitted therein, in connection with said first, second and third channels (K1 , K2, K3), first and second control channels (MK1 , MK2) for two control elements (M1 , M2) operable independently of each other from the outside.
• the channel of the first control element extends most preferably through the first, second and third channels (K1 , K2, K3) and is arranged in connection with the two first outlet ports (C2+, C8+) and the two first inlet ports (C3-, C7-).
• the channel of the second control element extends most preferably through the first, second and third channels (K1 , K2, K3) and is arranged between the two second outlet ports (C1 +, C5+) and the two second inlet ports (C4-, C6-).
• the body is adapted to enable the accomplishment of at least six different actions with said actuators by using as few as just two control elements, such as solenoid valves, capable of being controlled from the outside independently of each other.
• the body is internally provided with backpressure valves for returning the fluid by way of a backpressure valve onto the rod side of a cylinder connected to the valve body, as well as for returning the excess fluid resulting from a volume difference into a pressure accumulator to a return port which is adapted to discharge the pressure into a first available channel or outlet.
• the body is equipped with one or more safety valves, as well as with a backpressure valve, and the actions are accommodated in a single body.
• hydraulic fluid arriving by way of a safety valve can be successfully returned into the reservoir by way of a single port, or, alternatively, the fluid is returned by way of a backpressure valve onto the rod side of a cylinder connected to the valve body, as well as the excess fluid into the pressure accumulator to a return port which is adapted to discharge the pressure into a first available channel or outlet.
• valve body solution according to the invention its channel systems and communications between various outlets and inlets as well as main lines are worked out in such a way that all of said actions are attainable by using not more than two external control elements, such as magnetic valves.
• Fig. 1 shows one valve body of the prior art
• Figs. 2A-2B show one exemplary valve body according to one preferred embodiment of the invention
• FIGS. 3A-3B show one exemplary valve body according to one preferred embodiment of the invention
• Figs. 4A-4B show one exemplary valve body according to one preferred embodiment of the invention
• Figs. 5A-5B show another exemplary valve body according to one preferred embodiment of the invention
• Fig. 6 shows channel systems for one exemplary valve body according to one preferred embodiment of the invention.
• Fig. 1 has been explained in the prior art describing section.
• Figs. 2A-2B, 3A-3B, 4A-4B and 5 illustrate preferred embodiments for one exemplary valve body, wherein a hydraulic valve body (100) comprises two main ports (P1 , P2) for conveying pressurized hydraulic fluid into the body's channel and further out of the channel system.
• the body further comprises four outlet ports (C1 +, C2+, C5+, C8+) for directing the hydraulic fluid from the body's channel system further to actuators (E1 , E2, E3, E4) external of the body, as well as four respective inlet ports (C3-, C4-, C6-, C7-) for directing the hydraulic fluid from said actuators back into the body's channel system.
• the body (100) comprises: - at least one first channel (K1 ) provided between a first outlet (C5+) and a second inlet (C7-),
• said third channel (K3) enables one additional motion, i.e. a diagonal motion.
• the diagonal motion is enabled explicitly by means of the third channel (K3) provided between the third inlet (C4-) and the fourth inlet (C3-).
• the second channel (K2) is closed by the action of said control elements).
• the third channel (K3) is adapted to become closed by the action of said control elements and the diagonal motion will be closed.
• the second channel (K2) is adapted to be opened by the action of said control elements to the second main port (P2), whereby said third inlet (C4-) and fourth inlet (C3-) become open to the main port (P2) by way of said second channel (K2).
• the body also comprises a fourth channel (K4) provided in the body between the first outlet (C5+) and the third outlet (C1 +), said fourth channel (K4) being adapted to be openably closable for example by means of a fourth plug (T4) placed in connection with said fourth channel.
• Said fourth plug (T4) is most preferably present in said fourth channel (K4) in such a manner that, when in place, said fourth plug (T4) closes said fourth channel (K4) and, when removed, opens the same.
• Said fourth plug (T4) is most preferably present underneath a first plug (T1 ) fitted in the body, such that said first plug (T1 ), when in its opened condition, enables a removal of said fourth plug (T4) from the opening created as a result of removing the first plug (T1 ).
• said first plug (T1 ) is replaced most preferably in its position in the body, such that, when the body is in operation, no hydraulic oil is allowed outside the body assembly.
• the body (100) comprises most preferably also a fifth channel (K5) provided in the body between the fourth outlet (C2+) and the second main port (P2), said fifth channel (K5) being also adapted to be openably closable by means of a third plug (T3) placed in connection with said fifth channel.
• Said third plug (T3) is most preferably present in said fifth channel (K5) in such a manner that, when in place, said third plug (T3) closes said fifth channel (K5) and, when removed, opens the same.
• Said third plug (T3) is most preferably present underneath a second plug (T2) fitted in the body, such that said second plug (T2), when in its opened condition, enables a removal of said third plug (T3) from the opening created as a result of removing the second plug (T2).
• said second plug (T2) is replaced most preferably in its position in the body, such that, when the body is in operation, no hydraulic oil is allowed outside the body assembly.
• the body (100) according to the invention comprises most preferably at least arrangements, such as bores and threads, for said plugs (T1 -T4).
• the body has most preferably accommodated therein, in connection with said first, second and third channels (K1 , K2, K3), first and second control channels (MK1 , MK2) for two control elements (M1 , M2) to be controlled from outside independently of each other.
• the control channel (MK1 ) for the first control element (M1 ) extends most preferably through the first, second and third channels (K1 , K2, K3) and is arranged in connection with the two first outlet ports (C2+, C8+) and the two first inlet ports (C3-, C7-).
• the control channel (MK2) for the second control element (M2) extends most preferably through the first, second and third channels (K1 , K2, K3) and is arranged in connection with the two second outlet ports (C1 +, C5+) and the two second inlet ports (C4-, C6-).
• the body can be adapted to enable the accomplishment of at least six different actions, most preferably actions 1/1 , 1/2, 1/3, 1/4, 2/1 , 2/2, 2/3, and 3/1 , 3/3, 3/3 as well as 3/4, with actuators coupled thereto by using not more than two control elements, such as magnetic valves, to be controlled from outside independently of each other.
• the hydraulic valve body according to the invention will be described next by explaining a few exemplary actions and body configurations for achieving said actions.
• the proposed actuator to be employed is a cylinder, yet it should be appreciated that the invention is nevertheless not limited to this but the body according to the invention can also be accompanied with other types of actuators as presented elsewhere in this document.
• the body is configured to include a first flow circuit (VP1 ), wherein the body (100) comprises a first channel (K1 ) provided between a first outlet (C5+) and a second inlet (C7-) and a second channel (K2) provided between a first inlet (C6-) and a second outlet (C8+), such that the first outlet (C5+) is adapted to be connected with a first side (S5, for example the piston side of a cylinder) of the first actuator (E1 ) and the first inlet (C6-) is adapted to be connected with a second side (S6), for example the rod side of a cylinder) of the first actuator (E1 ), and the second outlet (C8+) is adapted to be connected with a first side (S8, for example the piston side of a cylinder) of the second actuator (E2) and
• VP1 first flow circuit
• the body (100) comprises a first channel (K1 ) provided between a first outlet (C5+) and
• first main port (P1 ) is adapted to link with the first channel (K1 ) provided between the first outlet (C5+) and the second inlet (C7-), and the second main port (P2) is adapted to link with the second channel (K2) provided between the first inlet (C6-) and the second outlet (C8+).
• Said first flow circuit can be used for providing a configuration by means of which it is possible to control for example a simultaneous and oppositely directed motion of two cylinders (E1 , E2) (this is possible when the piston-side end of the cylinders have a surface area which is larger than the rod-side end of the cylinder, whereby the surface area results an unequal force on the rod and piston sides).
• the direction of motion depends on which one of the main ports (P1 , P2) is used for feeding oil into the body's channel system.
• Said first action (action 1/1 ) is accomplished with a hydraulic valve of the invention, comprising said first flow circuit, when the control elements (M1 , M2) included therein are not active, for example magnetic switches are not energized.
• the first outlet (C5+), the first inlet (C6-), the second inlet (C7-) and the second outlet (C8+) are adapted to be openably closable for example with plugs (depicted in line with said ports e.g. in figs. 3A, 3B, 4A and 4B) capable of being screwed into structures of the body.
• plugs depicted in line with said ports e.g. in figs. 3A, 3B, 4A and 4B
• the body is configured to include a second flow circuit (VP2), wherein the body (100) comprises a fourth outlet (C2+) and a fourth inlet (C3-).
• the body comprises a first control channel (MK1 ) for the first control element (M1 ), such that the first control element (M1 ) enables closing of the first channel (K1 ) linked with the second inlet (C7-) as well as opening of the first main line by way of the first channel (K1 ) to the fourth outlet (C2+).
• the first main port (P1 ) is adapted to be coupled, under the control of the first control element (M1 ), to the first channel (K1 ) and thereby to said fourth outlet (C2+), and the second main port (P2) is adapted to be coupled to the second channel (K2) and thereby to said fourth inlet (C3-).
• the first main port (P1 ) is adapted to be coupled, under the control of the first channel (K1 ) and the second control element (M2), to said third outlet (C1 +), and the second main port (P2) is adapted to be coupled by way of the second channel (K2) to said third inlet (C4-).
• Said configuration is capable of providing the action 1/3.
• the first outlet (C5+) there is provided the action 2/2 under the control of a control element (M2). Said actions are described elsewhere in this document.
• the rod closes the second inlet (C7-), whereby the preceding described action 1/1 closes.
• the first main line (P1 ) is directed a controlled pressure flow along the channel (K1 ) to the fourth outlet (C2+) and thence onto the cylinder's piston side (S2), whereby from the rod side (S3) the oil is directed to the fourth inlet (C3-) and thence further along the second channel (K2) to the return port (P2).
• the cylinder's motion in opposite direction occurs in a reverse manner as the control pressure flow is connected to the port (P2), whereby the first main line (P1 ) functions as a return port.
• the fourth outlet (C2+) is adapted to be connected onto a first side (S2, for example onto the piston side of a cylinder) of a third actuator (E3)
• the fourth inlet (C3-) is adapted to be connected onto a second side (S3, for example onto the rod side of a cylinder) of the third actuator (E3).
• the ports C5+, C6-, C7- and C8+ need not be plugged.
• said second flow circuit (VP2) of the body can be configured as a second additional flow circuit and for providing a second additional action (e.g. the action of a left-hand cylinder, action 2/1 - especially figs. 3a, 3B).
• a second additional action e.g. the action of a left-hand cylinder, action 2/1 - especially figs. 3a, 3B.
• at least the second inlet (C7-) is plugged, thus providing the configuration shown in figs. 3A and 3B and therein the action of the third actuator (E3).
• the action 2/1 is conducted as follows:
• a controlled pressure flow is directed from the first main port (P1 ) along the channel (K1 ) to the fourth outlet (C2+) and thence onto the cylinder's piston side (S2), whereby from the rod side (S3) the oil is directed to the fourth inlet (C3-) and thence along the second channel (K2) to the return port (P2).
• the cylinder's motion in opposite direction occurs in a reverse manner as the control pressure flow is connected to the port (P2), whereby the first main line (P1 ) functions as a return port.
• the body is configured to include a third flow circuit (VP3), wherein the body (100) comprises a third outlet (C1 +) and a third inlet (C4- ), as well as for closing the channel (K1 ) which connects a second control channel (MK2) of the second control element (M2) to the first outlet (C5+) and for further opening the same to the third outlet (C1 +), and wherein the third outlet (C1 +) is adapted to be connected onto an inlet side (S1 , for example onto the piston side of a cylinder) of a fourth actuator (E4) and the third inlet (C4-) is adapted to be connected onto an outlet side (S4, for example onto the rod side of a cylinder) of the fourth actuator (E4).
• VP3 third flow circuit
• the second and third configurations can be implemented simultaneously, whereby the activation of both control elements (M1 , M2) enables a simultaneous action (action 2/3) of two actuators (E3 and E4), for example the simultaneous contraction and expansion of cylinders).
• plugging the first outlet (C5+), the first inlet (C6-), the second inlet (C7-) and the second outlet (C8+) enables an action 2/3 (the simultaneous contraction and expansion of a cylinder as both control elements are active or e.g. magnetic valves are electrified).
• the action 1/3 is conducted as follows:
• the rod closes a first outlet (C5+) of the channel, whereby the preceding described action (action 1/1 ) closes,
• a controlled pressure flow is directed from the first main port (P1 ) to the third outlet along the channel (K1 ) (C1 +) and thence onto the cylinder's piston side (S1 ), whereby from the rod side the oil is directed to the third inlet (C4-) and thence further along the second channel (K2) to the return port (P2).
• the cylinder's motion in opposite direction occurs in a reverse manner as the control pressure flow is connected to the port (P2), whereby the first main line (P1 ) functions as a return port.
• said third flow circuit (VP3) of the body can be configured as a third additional flow circuit and for providing a third additional action (simultaneous contraction and expansion of cylinders E3 and E4, action 2/3 - especially figs. 3A, 3B), in which embodiment both control elements (M1 , M2) are active.
• the action 2/3 is conducted as follows: When both control elements (M1 , M2) are energized, the rods close the first channel (K1 , between C7- and C5+), whereby the action 1/1 closes. Thereby, a controlled pressure flow is directed from the first main port (P1 ) along the channel (K1 ) to the third outlet (C1 +) and to the fourth outlet (C2+) and thence onto the cylinders' piston side (S1 , S2), whereby from the rod side (S3, S4) the oil is directed to the fourth inlet (C3-) and to the third inlet (C4-) and thence along the second channel (K2) to the return port (P2).
• the cylinders' motion in opposite direction occurs in a reverse manner as the control pressure flow is connected to the port (P2), whereby the first main line (P1 ) functions as a return port.
• said third flow circuit of the body can be configured as a fourth additional flow circuit and for providing a fourth additional action (the action of a right-hand cylinder, action 2/2 - especially figs. 3A, 3B), in which embodiment at least the first outlet (C5+) is plugged and the fourth control element is active, thereby providing the configuration shown in figs. 3A and 3B and therein the action of a fourth actuator (E4).
• a fourth additional action the action of a right-hand cylinder, action 2/2 - especially figs. 3A, 3B
• a controlled pressure flow is directed from the first main port (P1 ) along the channel (K1 ) to the third outlet (C1 +) and thence onto the cylinder's piston side (S1 ), whereby from the rod side (S4) the oil is directed to the third inlet (C4-) and thence along the second channel (K2) to the return port (P2).
• the cylinders' motion in opposite direction occurs in a reverse manner as the control pressure flow is connected to the port (P2), whereby the first main line (P1 ) functions as a return port.
• the body thus also comprises a fourth channel (K4) provided in the body between the first outlet (C5+) and the third outlet (C1 +), said fourth channel (k4) being adapted to be openably closable with a fourth plug (T4).
• the body also comprises a fifth channel (K5) provided in the body between the fourth outlet (C2+) and the second main port (P2), said fifth channel (K5) being adapted to be openably closable with a third plug (T3).
• the body in order to establish the fourth, fifth and sixth flow circuits (VP4, VP5, VP6) (and, respectively, in order to enable the fourth 3/1 , fifth 3/2 and sixth 3/3 actions), has its first outlet (C5+), first inlet (C6-), second inlet (C7-) and second outlet (C8+) closed for example with a plug (cf. especially figs. 4A, 4B).
• the body has its fourth channel (K4) and fifth channel (K5) opened, such that the fourth channel (K4) links the first outlet (C5+) and the third outlet (C1 +) within the body to each other, and the fifth channel (K5) links the fourth outlet (C2+) and the second main port (P2) within the body to each other by way of the second channel (k2).
• the plugs (T4, T5) which close said channels (K4, K5).
• a fourth flow circuit (VP4), wherein the body (100) comprises a third outlet (C1 +) connected to the first main port (P1 ) by way of the fourth channel (K4), a third inlet (C4-) and a fourth inlet (C3-) connected thereto by way of the third channel (K3), as well as a fourth outlet (C2+) connected to the second main port (P2) by way of the fifth channel (K5).
• the third outlet (C1 +) is adapted to be connected to an inlet side (S1 , for example to the piston side of a cylinder) of a fourth actuator (E4)
• the third inlet (C4-) is adapted to be connected to an outlet side (S4, for example to the rod side of a cylinder) of the fourth actuator (E4)
• the fourth inlet (C3-) is adapted to be connected to an inlet side (S3, for example to the rod side of a cylinder) of a third actuator (E3)
• the fourth outlet (C2+) is adapted to be connected to an outlet side (S2, for example to the piston side of a cylinder) of the third (E3) actuator.
• a controlled pressure flow is directed from the first main port (P1 ) by way of the opened channel (K4) to the third outlet (C1 +) and thence onto the cylinder's (S1 ) piston side, whereby from the rod side (S4) the oil is directed to the third inlet (C4-) and thence along the connecting channel (K3) to the fourth inlet (C3-) and thence onto the cylinder's rod side (S3), whereby from the piston side (S3) the oil is directed to the fourth outlet (C2+) and thence by way of the opened channel (K5) to the return port (P2).
• the cylinders' motion in opposite direction occurs in a reverse manner as the control pressure flow is connected to the port (P2), whereby the first main line (P1 ) functions as a return port.
• the body is configured to include a fifth flow circuit (VP5), wherein the body (100) comprises a first control channel (MK1 ) for a first control element (M1 ), such that a communication of the fourth outlet (C2+) by way of the fifth channel (K5) with the second main port (P2), and the third channel (K3) present between the third inlet (C4-) and the fourth inlet (C3-), are adapted to be closed by the action of said control element (M1 ); and whereby the channel between the first main port (P1 ) and the fourth outlet (C2+) is adapted to be opened by way of the first channel (K1 ) by the action of said first control element (M1 ), and the channel between the second main port (P2) and the fourth inlet (C3- ) is adapted to be opened by way of the second channel (K2) by the action
• a fifth flow circuit VP5
• the body (100) comprises a first control channel (MK1 ) for a first control element (M
• the fourth outlet (C2+) is adapted to be connected to an inlet side (S3, for example to the piston side of a cylinder) of a third actuator (E3) and the fourth inlet (C3-) is adapted to be connected to an outlet side (S3, for example to the rod side of a cylinder) of the third actuator (E3).
• the body is configured to include a sixth flow circuit (VP6), wherein the body (100) in this case comprises a second control channel (Mk2) for a control element (M2), such that a communication of the third outlet (C1 +) by way of the firs channel (K1 ) with the first main port (P1 ) is adapted to opened and the fourth channel (K4) between the third outlet (C1 +) and the first outlet (C5+) is adapted to be closed and a communication of the third inlet (C4-) with the third channel (K3) is adapted to be closed by the action of said second control element (M2).
• Mk2 second control channel
• M2 control element
• a communication is adapted to be established between the third inlet (C4-) and the second main port (P2) by way of the second channel (K2) by the action of said control element (M2).
• the third outlet (C1 +) is adapted to be connected to an inlet side (S1 , for example to the piston side of a cylinder) of a fourth actuator (E4) and the third inlet (C4-) is adapted to be connected to an outlet side (S4, for example to the rod side of a cylinder) of the fourth actuator (E4).
• the fifth and sixth configurations can be carried out simultaneously, whereby, when activating both control elements (M1 , M2), there is achieved a simultaneous action (action 3/4) of two actuators (E3 and E4), for example a simultaneous contraction and expansion of cylinders).
• a controlled pressure flow is directed from the first main port (P1 ) to the third outlet (C1 +) and the fourth outlet (C2+) of the first channel (K1 ) and thence onto the cylinder's piston side (S1 , S2), whereby from the rod side (S3, S4) the oil is directed to the fourth inlet (C3-) and to the third inlet (C4-) and thence along the second channel (K2) to the return port (P2).
• the cylinders' motion in opposite direction occurs in a reverse manner as the control pressure flow is connected to the port (P2), whereby the first main line (P1 ) functions as a return port.
• the body is fitted with sites or channels for safety valves/backpressure valves, whereby, the attachment of said valves to the body enables the body to operate as a multipurpose hydraulic valve.
• a first safety valve/backpressure valve (V1 ) is adapted to be connected for communication with the second outlet (C8+) by way of a first safety channel (VK1 ) included in the body.
• a second safety valve/backpressure valve (V2) is adapted to be connected for communication with the first outlet (C5+) by way of a second safety channel (VK2) included in the body.
• a third safety valve (V3) is adapted to be connected for communication with the third outlet (C1 +) by way of a third safety channel (VK3) included in the body.
• a fourth safety valve (V4) is adapted to be connected for communication with the fourth outlet (C2+) by way of a fourth safety channel (VK4) included in the body.
• the body also comprises a site for a fifth safety valve/backpressure valve (V5), which is adapted to be connected, by way of a fifth safety channel (VK5), to the third channel (K3) linking the fourth inlet (C3-) and the third inlet (C4-), such that said safety channels are further adapted to be directed into a joint return channel (15).
• a fifth safety valve/backpressure valve (V5) is shown in figs. 2A-4B.
• figs. 5A-5B illustrate another exemplary valve body according to one preferred embodiment of the invention, wherein the body also comprises a site for one sixth safety valve/backpressure valve (V6), which is most preferably adapted to be connected for communication with the fourth inlet (C3-) by way of a sixth safety channel (VK6).
• the body may also comprise a site for a seventh safety valve/backpressure valve (V7), which is most preferably adapted to be connected for communication with the third inlet (C4-) by way of a seventh safety channel (VK7).
• the body most preferably comprises a second connecting channel passage (YK2), which is adapted to link said sixth and seventh safety valves/backpressure valves (V6, V7) with each other, as well as to link these with a joint return channel (15) included in the body.
• said safety channels are adapted, whenever necessary, to discharge the pressure into a pressure accumulator (not shown in the figures) attached to the body and, further, whenever necessary, to discharge the pressure back from the pressure accumulator by way of said fifth (V5) into the third channel (K3)present between the fourth inlet (C3-) and the third inlet (C4-).
• the pressure is adapted to discharge by way of the sixth safety channel (VK6) and/or the seventh safety channel (VK7), as well as by way of the respective backpressure valves/safety valves (V6, V7), into the fourth inlet (C3-) and/or the third inlet (C4-).
• the body also comprises an eighth safety channel (VK) for connecting the first safety channel (VK1 ) and the second safety channel (VK2) to the joint return channel (15).
• the return channel and the safety/backpressure valves connected thereto are adapted, as necessary, to discharge the pressure into a pressure accumulator attached to the body or into some other external arrangement, such as a tank line or a separate vessel or the like (not shown in the figures), and further, as necessary, to deliver the pressure back from the joint return channel (15) by way of the first safety channel (VK1 ) and the second safety channel (VK2), and further, for example, by way of the V1 and V2 safety valves/backpressure valves - (backpressure valves present in valve cartridges) - to the second outlet (C8+) and/or to the first outlet (C5+).
• the body is provided with a first connecting channel (YK1 ) for linking to each other the channels of the first safety valve/backpressure valve (V1 ) and the second safety valve/backpressure valve (V2).
• safety valve/backpressure valve arrangements can be implemented either with a single safety valve/backpressure valve or with two different functional components, one of which is a safety valve and the other a backpressure valve.
• the invention relates also to a hydraulic valve, which is attained by supplementing a hydraulic valve body of the invention with appropriate valves and control elements.
• the hydraulic valve according to the invention comprises most preferably a body according to any of the aforementioned embodiments, as well as first and second control elements (M1 , M2), disposed in first and second control channels (Mk1 , Mk2) associated in communication with first, second and third channels (K1 , K2, K3) and to be controlled from outside independently of each other.
• Said control element comprises most preferably a movable rod disposed in the control channel (Mk1 , Mk2), said rod being adapted to establish at least some of said configurations for the body's channel system.
• the control element is a magnetic valve (M1 , M2), but it can also be a pneumatically, hydraulically or mechanically controlled valve.
• the hydraulic valve body is internally fitted with backpressure valves (V1 , V2, V3, V4, V5, V6, V7) for returning fluid by way of the backpressure valve onto the piston/rod side of a cylinder coupled with the hydraulic valve, as well as for returning excess fluid, resulting from a volume difference, for example into a pressure accumulator by way of a return port (15) which is arranged to discharge the pressure to a first available port (C1 +, C2+, C3- , C4-, also C5+, C8+; by way of the channel K1 or K2 to C7- and C6-), in which the pressure is favorable for receiving a shock-generated pressure.
• the valves (V3, V4) can also be replaced with safety/backpressure valves, the latter being adapted, as necessary, to discharge the pressure also to the ports (C1 +, C2+).
• Fig. 6 shows the channel systems of one exemplary valve body in accordance with one preferred embodiment of the invention.
• the displayed channels K1 -K5, MK1 , MK2 have been described in more detail elsewhere in this document.

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• 2013
  • 2013-12-11 FI FI20136245A patent/FI125380B/fi active IP Right Grant
• 2014
  • 2014-12-11 EP EP14870200.4A patent/EP3094901A4/en active Pending
  • 2014-12-11 WO PCT/FI2014/050985 patent/WO2015086908A1/en active Application Filing

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