JP4838490B2 - Control valve device - Google Patents

Description

  The present invention relates to a control valve device for controlling the upward and downward movements of at least two consumer units arranged in parallel.

  A control valve device of the above type is used in a work machine, for example a construction machine, in particular a power shovel, to control a jib that can be actuated by two jib cylinders arranged in parallel.

  Known control devices have, for example, a directional control valve arranged in the region on the ascending side of the consumer in order to control the ascending and descending movements of each consumer. In order to allow even movement of both consumers, the directional control valve and its open cross-section must be precisely matched to each other. In known control valve devices, a tensioning state may occur between the consumers based on the different load sharing between both jib cylinders during ascent and descent. A pressure compensation conduit is required.

  Such a control valve device has a high construction cost and thus a high manufacturing cost, based on the use of two directional control valves and a compensating conduit between the consumers. In addition, precise matching of both directional control valves increases the adjustment costs for reliable operation of both jib cylinders.

  The object of the present invention is to provide a control valve device of the type described at the outset, which is cost-effective and can control two consumers arranged in parallel in a simple manner. That is.

  An object of the present invention is to provide a directional control valve connected to a pump and a tank in order to control a downward movement and an upward movement, the directional control valve being a lower side of the first consumer, a second This is solved by being connected to the descending side of the consumer and the ascending side of the first consumer and connected to the ascending side of the second consumer via a safety valve. As a result, according to the present invention, in order to control both consumers arranged in parallel with each other, only one directional control valve for controlling the rising and lowering movements of both consumers is required. The safety function additionally provided by the known second directional control valve, i.e. the function of preventing the second consumer from descending uncontrolled in the event of a conduit rupture, is achieved in the control valve device according to the invention. Is undertaken by a safety valve. The compensation conduit between both consumers, which is necessary with this kind of known control valve device, is not necessary in the case of the control valve device according to the invention. Low manufacturing costs are obtained by controlling both consumers with a single directional control valve and omitting the compensation conduit between the rising sides of both consumers. Furthermore, the use of a unique directional control valve eliminates the need for adjustment costs for reliable operation of the consumer.

  As long as the directional control valve is connected to the rising side of the first consumer via a safety valve, in the same simple manner, the first consumer will prevent the consumer from lowering if the conduit ruptures. A safety function is added.

  According to an advantageous embodiment of the invention, the directional control valve is arranged on the ascending side of the first consumer. In this case, the safety valve can be configured as a check valve that can be unlocked and that opens toward the rising side of the first consumer. The directional control valve thus constitutes a component of a cylinder mounted valve arranged in the first consumer. In this case, the ascending side of the first consumer can be shut off in a simple manner with a check valve that can be unlocked.

  According to another configuration of the invention, the safety valve is arranged on the rising side of the second consumer and is configured as a particularly spring-loaded check valve that can be unlocked. As a result, the safety valve is configured as an attachment valve disposed on the rising side of the second consumer. By configuring as a check valve that can be unlocked, the ascending side of the second consumer can be shut off in a simple manner.

  In the control valve device according to the present invention, a single directional control valve is used to control both consumers, the ascending side safety of the first consumer is ensured via the safety valve, and the second In order to ensure safety on the ascending side of the consumer via the safety valve, a pressure medium conduit, for example a hose or pipe conduit, is connected to the second consumer between the directional control valve and the safety valve from the first consumer. Can be led to a deployed safety valve.

  According to an advantageous embodiment, if the safety valve can be loaded by the supply side pressure generated upstream of the safety valve at the rising position of the directional control valve, the safety valve can be controlled to open in a simple manner during the ascending operation. it can.

  During the descending operation, the safety valve can be loaded in a simple manner toward the overflow position with the discharge side pressure generated downstream of the safety valve.

  If the pressure medium connection conduit ruptures at the start of the descent operation, the safety valve can be loaded in a simple manner towards the overflow position by a control signal that loads the directional control valve into the lowered position.

  In accordance with the advantageous configuration of the invention, the second consumer can be controlled and lowered in a simple manner by the safety valve upon the bursting of the pressure medium connection conduit as long as the safety valve has a control cross section.

  According to another advantageous configuration of the invention, an actuating device is provided for actuating the safety valve, which can be loaded with pressure on the supply side in the raised position and with pressure on the discharge side in the lowered position. A first control surface that can be loaded and a second control surface that can be loaded by a control signal that loads the directional control valve to the lowered position. With such an actuating device, the safety valve is controlled to open in the raised position and the lowered position, and thus in both flow directions at a low cost.

  A special advantage is that, according to one embodiment of the invention, the actuating device is composed of a first piston and a second piston as divided pistons, the first piston having a first control surface. The second piston has a second control surface, and the second piston has a third control surface that acts opposite the second control surface. This third control surface Can be achieved by the pressure on the discharge side. The piston of the actuating device has the function of a transmission piston that enables control of the safety valve to the overflow position when the pressure on the supply side or the discharge side is small. As a result, the pressure loss is reduced, and the second consumer can be operated in the ascending operation and the descending operation with a slight flow loss.

  The first control surface and the third control surface are preferably connected to the tank via a throttle. In the event of a change in pressure on the supply side or on the discharge side, the safety valve is controlled accordingly.

  According to another configuration of the invention, a pressure safety device is provided on the rising side of the second consumer.

  The pressure safety device preferably has a pre-control valve adjusted to a safe pressure. This pre-control valve is loaded at the inlet side with the pressure generated on the rising side of the second consumer and is connected to the first control surface of the first piston on the outlet side. If the pressure on the rising side of the second consumer is unacceptably high, the safety valve is controlled to open to the overflow position in a simple manner by the front control valve, and as a result, safety can be ensured on the rising side of the second consumer. Achieved.

  The actuator piston is provided with a control pressure conduit for loading the first control surface of the first piston and the third control surface of the second piston, the control pressure conduit being a directional control valve. A second control which is connected to a first control pressure conduit which produces a supply-side pressure in the ascending position or a discharge-side pressure in the ascending position and which can be loaded by the safety pressure of the pre-control valve When connected to a pressure conduit, it can be operated in a simple manner.

  According to an advantageous embodiment of the invention, the safety valve has a control piston which is controlled relative to a valve seat configured in the casing bore. In this case, the actuating device is arranged coaxially with respect to the casing hole. With a control piston controlled by the actuating device and controlled by the valve seat, a check valve that can be unlocked in both overflow directions can be formed in a simple manner. In this case, the coaxial arrangement of the actuating device enables a space-saving configuration that allows the second consumer to be arranged on the rising side.

  As long as the casing hole is connected to the first connection passage leading to the connection connected to the pressure medium connection conduit and connected to the second connection passage leading to the rising side of the second consumer, the control pressure conduit is A second control connected to the outlet of the shuttle valve and connected on the inlet side to a first control pressure conduit connected to the first connection passage and to the second connection conduit There are many advantages to being connected to a conduit. As a result, the pressure on the supply side or the discharge side as well as the safety pressure of the pre-control valve can be introduced to the control pressure conduit in a simple manner and thus to the first and third control surfaces.

  In order to control the opening of the safety valve, according to another configuration of the invention, a pre-control valve can be provided which is actuated to the open position by the actuating device. The control pressure chamber acting in the direction of the locking position of the control piston in the open position is released to the tank.

  The spring for loading the safety valve into the locking position is advantageously arranged in a spring chamber connected to a tank passage connected to the tank.

  The front control valve is arranged in the longitudinal hole of the control piston, this longitudinal hole is connected to a control pressure chamber acting in the direction of the locking position, and a lateral hole leading to the spring chamber is connected to the longitudinal hole And the construction cost for the pre-control valve is reduced.

  The tank passage is preferably connected to a branch conduit connected to the first and third control surfaces, and a throttle point is arranged in this branch conduit.

  According to another configuration of the invention, a pressure medium passage is provided from the pressure medium connection conduit to the passage between the directional control valve and the safety valve. In this case, a safety valve is arranged in the pressure medium passage. This safety valve prevents the pressure medium from flowing from the directional control valve to the safety valve when the pressure medium conduit is ruptured at a slight cost.

  The safety valve is advantageously configured as a shut-off valve, which can be loaded into the overflow position by means of the pressure generated by the first consumer and the spring.

  A special advantage is obtained when the control valve device according to the invention is used to control a jib of a construction machine, in particular a power shovel, which can be actuated by at least two parallel arranged jib cylinders. . According to the present invention, comprising a directional control valve, a safety valve and a safety valve, comprising a cylinder mounting valve mounted on the rising side of the first jib cylinder and a mounting valve having a safety valve and mounted on the second jib cylinder The control valve arrangement allows the jib to be raised and lowered in a simple manner, avoiding uncontrolled jib lowering upon conduit rupture. The tuning costs of both directional control valves and the compensation conduit between the jib cylinders compared to the prior art control valve devices are not required in the present invention.

  The figure shows a control device 1 according to the invention for controlling two consumers 2a, 2b configured as hydraulic cylinders arranged in parallel. The consumers 2a, 2b can be configured, for example, as jib cylinders for actuating jibs not shown in the construction machine, especially configured as power shovels.

  The control valve device has a directional control valve 3 that exerts a throttling action at an intermediate position. The direction control valve 3 has a neutral position 3a, a lowered position 3b, and a raised position 3c. This directional control valve 3 is a part of the cylinder mounting valve 4 arranged on the rising side A of the first consumer 2a.

  The direction control valve 3 has a pump connection portion, and this pump connection portion is connected to a pump connection portion P of the cylinder mounting valve 4 via a pump passage 5 formed in the cylinder mounting valve 4. Two tank connecting portions of the directional control valve 3 are connected to a tank connecting portion T of the cylinder mounting valve 4 using a tank passage 6. Further, a load pressure medium connecting portion is provided in the direction control valve 3, and this load pressure medium connecting portion is connected to the load pressure medium connecting portion LS of the cylinder mounting valve 4 via the load sensing passage 7.

  A directional control valve 3 is connected to the rising side A of the second cylinder 2 a by a pressure medium passage 8 formed in the cylinder mounting valve 4. A safety valve 9 is arranged in the pressure medium passage 8. This safety valve 9 is configured as a shut-off valve that opens toward the ascending side A of the first consumer 2a. In order to control the safety valve 9 to be opened at the lowered position of the direction control valve 3, a front control valve 10 is provided.

  The pressure medium passage 11 of the cylinder mounting valve 4 led to the direction control valve 3 is connected to the connection portion B of the cylinder mounting valve 4. The connecting portion B is connected to the descending side B of the first consumer 2a via a hose or pipe conduit 12. The lower side B of the second consumer 2b is further connected to the connecting portion B of the cylinder mounting valve 4. In this case, the hose or pipe conduit 13 can be led from the descending side B of the second cylinder 2b to the descending side B of the first consumer 2a.

  A bypass passage 14 leads from the pressure medium passage 11 of the cylinder mounting valve 4 to another connection portion of the direction control valve 3. This connecting portion is connected to the pressure medium passage 8 at the lowered position 3b. A shutoff valve 15 that opens toward the pressure medium passage 11 is arranged in the bypass conduit 14.

  The direction control valve 3 can be operated hydraulically. In this case, the control pressure conduit leads a control signal X, for example a hydraulic control pressure that cooperates with the control surface of the directional control valve 3 acting towards the raised position 3c. The control surface of the directional control valve 3 acting towards the lowered position 3b of the directional control valve 3 cooperates with the control pressure conduit 16b. For example, a control signal Y formed as a hydraulic control pressure is guided by the control pressure conduit 16b.

  The front control valve 10 likewise serves to detect the load pressure at the raised position 3c of the directional control valve 3. For this purpose, the front control valve 10 is connected to the pressure medium passage 8 between the direction control valve 3 and the safety valve 9 via a branch passage 17. Another passage 18 leads from the shut-off side of the safety valve 9 to the front control valve 10. Further, the front control valve 10 is connected to the load sensing passage 7 by another passage 19. A check valve 20 that opens toward the load sensing passage 7 is disposed in the passage 19. The pre-control valve 10 connects the branch passage 17 to the passage 19 in order to detect the load pressure during the ascending operation at the first switching position 10a. In the second switching position 10b, the passage 18 can be connected to the passage 17 in order to control the opening of the safety valve 9 during the descending operation. The front control valve 10 can be loaded to the first switching position 10a by a spring. To the second switching position 10b, the front control valve 10 can be loaded by a control signal Y generated in the control pressure conduit 16b. For this purpose, the control pressure conduit 22 is led from the control pressure conduit 16b to the corresponding control surface of the front control valve 10.

  In order to ensure the pressure on the rising side A of the first consumer 2a, in the passage 24 leading from the pressure medium passage 8 to the tank passage 6 between the safety valve 9 and the rising side A of the first consumer 2a. A pressure limiting valve 23 is provided. A pressure limiting valve 25 is provided to ensure the pressure on the descending side B of the first consumer 2a and the descending side B of the second consumer 2b. The pressure limiting valve 25 is disposed in a passage 26 led from the pressure medium passage 11 to the tank passage 6 in the cylinder mounting valve 4.

  A pressure medium passage 30 is connected to the pressure medium passage 8 between the direction control valve 3 and the safety valve 9. The pressure medium passage 30 communicates with the connection portion A1 of the cylinder mounting valve 4. A safety valve 31 is connected to the connection A1 by means of a pressure medium conduit 29, for example a pipe or a hose conduit. This safety valve 31 is a component part of the mounting valve 32 arranged on the ascending side A of the second consumer 2b. In this case, the pressure medium conduit 29 is connected to the connection portion A1 of the attachment valve 32, and the pressure passage 33 communicates from the connection portion A1 to the ascending side of the second consumer 2b. A safety valve 75 is disposed in the pressure medium passage 30 of the cylinder mounting valve 4. The safety valve 75 is configured as a cutoff valve having a locking position 75a and a flow-through position 75b. The safety valve 75 can be loaded toward the locking position 75a by the pressure generated in the first consumer 2a upstream of the safety valve 75 and flows by the spring 76 and the pressure generated downstream of the safety valve 75. It is possible to load over-position.

  The safety valve 31 can be unlocked and is configured as a check valve 34 that opens toward the ascending side A of the second consumer 2b, and includes a control cross section 35. In the direction of the locking position, the safety valve is loaded by a spring 55.

  As shown in FIG. 2, the safety valve 31 has a control piston 60, and this control piston is supported in the casing hole 61 of the valve seat component 62 so as to be movable in the longitudinal direction. The valve seat component 62 includes a valve seat 63 that is mounted in the bore 43 of the mounting valve 32 and is controlled by the control piston 60. The spring 55 acting in the direction of the blocking position is arranged in a spring chamber 64 formed by the section of the hole 43 and is operatively coupled to the control piston 60 via a collar. The pressure medium passage 33 is formed by a first connection passage 65 that leads from the hole 43 to the connection portion A1 of the attachment valve 32, and a second connection passage 66 that leads from the hole 43 to the rising side A of the second consumer 2b. ing. The valve seat component 62 is formed with a lateral notch 67 in the region of the first connection passage 65. In this case, the control piston 60 is provided with a ring groove 68 in the region of the lateral notch 67, and a control cross section 35 is formed in this ring groove 68.

  In order to actuate the safety valve 31, an actuating device 36 is provided. The actuating device 36 is composed of a divided actuating piston having a first piston 36a and a second piston 36b. As can be seen from FIG. 2, the pistons 36 a and 36 b of the actuating device 36 are arranged coaxially with the control piston 60 in the hole 43 of the mounting valve 32. The piston 36a is provided with a first control surface 37a that acts in the direction of the overflow position of the safety valve 31. This first control surface 37 a is connected to a control pressure conduit 38, which is connected to the outlet of the shuttle valve 39. The shuttle valve 39 is connected to the first control pressure conduit 40 on the inlet side, and this control pressure conduit 40 is connected to the pressure medium passage 33 between the connection A 1 and the safety valve 31. For this purpose, the control pressure conduit 40 is connected to the first control passage 45, as shown in FIG. A second control pressure conduit 41 is connected to another inlet of the shuttle valve 39. The control pressure conduit 41 is connected to the pressure medium passage 33 between the shut-off valve 34 and the rising side A of the second consumer 2b. As shown in FIG. 2, the second control pressure conduit 41 can also be connected to the second connection passage 66. In order to ensure the pressure on the rising side A of the second consumer 2b, the second control pressure conduit 41 is provided with a front control valve 42 configured as a pressure limiting valve, and this front control valve 42 is secured. It is adjusted to pressure.

  The second piston 36b of the actuating device 36 is configured with a second control surface 37b that acts in the direction of the overflow position of the safety valve 31. The second control surface 37b can be loaded by a control signal Y that operates the directional control valve 3 toward the lowered position 3b. For this purpose, a branch control pressure conduit 45 is led from the control surface 37b to the control pressure conduit 16b.

  A third control surface 37c is formed on the second piston 36b. The third control surface 37c acts opposite to the second control surface 37b and can be loaded with the pressure formed in the control pressure conduit 38.

  In order to release the control pressure chamber 69 acting in the direction of the shut-off position of the control piston 60 having the action of the shut-off valve 34 and the control cross section 35, a front control valve 46 configured as a check valve is provided. ing.

  A branch conduit 47 leads from the control pressure conduit 38 to a tank conduit 48 of the mounting valve 32. The control pressure conduit 38 is provided with a throttle portion 49 and a check valve 50 that opens toward the tank passage 48. The tank passage 48 is connected to the spring side of the safety valve 31 through the passage 51 and is connected to the spring side of the shutoff valve 34 through the passage 52.

  It can be seen from FIG. 2 that the front control valve 46 is disposed in the longitudinal hole 70 of the control valve 60. The longitudinal hole 70 is connected to the control chamber 69 acting in the direction of the blocking position of the control piston 60, and is connected to the spring chamber 64 via the lateral hole 71. In the illustrated blocking position of the front control valve 46, the connection of the control chamber 69 to the spring chamber 64 is blocked. In the direction of the open position where the control chamber 69 is released toward the spring chamber 64 through the longitudinal hole 70 and the lateral hole 71, the front control valve 46 can be controlled to open by the actuating device 36. For this purpose, the front control valve 46 is operatively connected to the first piston 36 a via an actuating tappet 72. The longitudinal hole 70 and the lateral hole 71 of FIG. 2 form the passage 52 of FIG.

  The tank passage 48 is connected to a tank connection T of the mounting valve 32, and a tank connection conduit 53, such as a hose conduit or a pipe conduit, is connected to the tank connection T. The tank connection conduit 53 is connected to the tank of the cylinder mounting valve 4. It leads to the connection part T. A tank connection portion T of the cylinder mounting valve 4 is connected to the tank passage 6.

  To raise the jib, the directional control valve 3 is displaced toward the raised position 3c by a suitable control signal X generated in the control conduit 16. At this raised position 3 c, the pump passage 5 is connected to the pressure medium passage 8 and the pressure medium passage 11 is connected to the tank passage 6. The pressure medium flows toward the ascending side A of the cylinder 2a through the safety valve 9 controlled to be opened by the pressure on the supply side. The pressure on the supply side is generated in the pressure medium conduit 29 through the safety valve 75 loaded in the overflow position 75b, and in the connection passage 65 of the mounting valve 32. Via the first control pressure conduit 40, the pressure on the supply side acts on the first control surface 37a of the first piston 36a of the actuator 36 and loads the first piston 36a to the left in FIG. As a result, the front control valve 46 is loaded to the open position via the actuating tappet 72, and the control chamber 69 is released toward the spring chamber 64 and eventually to the tank passage 48 at this open position. When the first piston 36a comes into contact with the control piston 60, the control piston 60 is loaded toward the flow-through position to the left in FIG. 2 by the supply side pressure acting on the first control surface 37a of the first piston 36a. The In this flow-through position, the pressure medium flows through the first connection passage 65, the lateral cutout 67, and the ring groove 68 to the second connection passage 66, and eventually to the ascending side A of the second consumer 2b. The rising speeds of both consumers 2a, 2b are controlled via the direction control valve 3. Since the pressure balance between the rising side A of the first consumer 2a and the rising side A of the second consumer 2b is performed via the pressure medium connection conduit 29, the opened safety valve 9 and the opened safety valve 31. , Tension between both consumers 2a, 2b is avoided. The descending side B of the consumers 2 a and 2 b is connected to the tank passage 6 via the pressure medium passage 11 and the direction control valve 3.

  When the pipe is ruptured in the pipe leading from the pump to the pump connection P of the cylinder mounting valve 4 in the ascending operation, the pressure on the supply side in the pressure medium passage 8 and the first connection passage 65 collapses together. As a result, the safety valve 9 is loaded to the blocking position and blocks the rising side A of the first consumer 2a. In addition, a conduit rupture is recognized at the first control surface 37a of the first piston 36a by the collapse of the pressure on the supply side and the control piston 60 of the safety valve 31 is loaded into the shut-off position by the spring 55, thereby The ascending side A of the second consumer is blocked. Therefore, the safety valve 31 functions as an automatic conduit rupture safety device and a load maintenance valve. This effectively prevents the jib from descending uncontrolled.

  When the pressure medium conduit 29 between the cylinder mounting valve 4 and the mounting valve 32 is ruptured during the ascending operation, the pressure on the supply side of the safety valve 31 on the first control surface 37a of the first piston 36a is reduced. By collapsing, it is accelerated to the shut-off position 75a and eventually the connecting part A1 of the cylinder mounting valve 4 is shut off. This prevents the pressure medium from flowing out through the incomplete pressure medium conduit 29.

  During the jib lowering operation, the directional control valve 3 is displaced in the direction of the lowering position 3b by a corresponding control signal Y generated in the control conduit 16b. At this lowering position 3b, the pump passage 5 becomes the pressure medium passage 11. As a result, the pressure medium passage 8 and the tank passage 6 are connected to the descending side B of the consumers 2a and 2b. The front control valve 10 is loaded to the switching position 10b by the control signal Y, and the safety valve 9 can be controlled to be opened by the discharge side pressure formed in the pressure medium passage 8 at the switching position 10b. Furthermore, the control signal Y acts on the first control surface 37b of the second piston 36b via the control pressure branch conduit 45 and loads the front control valve 46 to the open position via the actuating tappet 72 and the first piston. As soon as 36a contacts the control piston 60, the front control valve 46 is moved to the open position to the left in FIG. When the control piston 60 is controlled to open, the pressure on the discharge side passes through the control pressure conduit 40, and the first control pressure surface 37a of the first piston 36a and the third control surface 37c of the second piston 36b. And act on. When the control piston 60 is controlled to be opened by the pressure on the discharge side acting on the third control surface 37c, the control signal Y acting on the second control surface 37b is compensated, and the control piston 60 is The opening is controlled by the pressure on the discharge side acting on the control surface 37a. The descending speed is controlled by the direction control valve 3.

  When a pipe rupture occurs in the pressure medium conduit 29 between the mounting valve 32 and the cylinder mounting valve 4 or in a tank conduit connected to the tank passage 6 of the cylinder mounting valve 4 during the descending operation, the first connection conduit 65 The pressure on the discharge side at the time collapses, and the control signal Y acting on the second control surface 37b in the operating device 36 is superior. The control piston 60 is loaded to the overflow position by the control signal Y. In this case, the corresponding control cross section 35 is opened by the control piston 60 according to the height of the control signal Y.

  Therefore, when the control signal Y acting on the directional control valve 3 and the control piston 60 causes a conduit burst in the tank conduit connected to the pressure medium conduit 29 or the tank connecting portion T of the cylinder mounting valve 4 during the descending operation. The jib can be controlled and lowered.

The circuit diagram of the control valve apparatus by this invention. The figure which showed one part of the said control valve apparatus concretely.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Control valve apparatus, 2a, 2b Consumer machine, 3 direction control valve, 4 Cylinder mounting valve, 5 Pump passage, 6 Tank passage, 7 Load sensing passage, 8 Pressure medium passage, 9 Safety valve, 10 Front control valve, 11 Pressure medium Passage, 13 hose or pipe conduit, 14 bypass passage, 16a, 16b control pressure conduit, 17 branch passage, 18 passage, 19 passage, 20 check valve, 22 control pressure conduit, 23 pressure limit valve, 24 passage, 25 pressure limit Valve, 26 passage, 29 pressure medium conduit, 30
Pressure medium passage, 31 safety valve, 32 mounting valve, 33 pressure medium passage, 34 check valve, 35 control cross section, 36 actuator, 38 control pressure conduit, 39 shuttle valve, 40 control pressure conduit, 42 pre-control valve, 46 Front control valve

Claims (17)

A control valve device for controlling the upward and downward movements of two consumers (2a, 2b) arranged in parallel, the direction connected to the pump and the tank for controlling the downward movement and the upward movement A control valve (3) is provided, and the direction control valve (3) is provided on the lower side (B) of the first consumer (2a) and on the lower side (B) of the second consumer (2b). Connected and connected to the ascending side (A) of the first consumer (2a) via the safety valve (9) and to the ascending side (A) of the second consumer (2b) via the safety valve (31) The safety valve (31) for the second consumer (2b) is arranged on the rising side (A) of the second consumer (2b) and can be unlocked, It is configured as a spring-loaded check valve (34), the safety valve (31) being lifted by the directional control valve (3) In the position (3c), it is possible to load in the direction of the overflow position by the pressure on the supply side acting on the upstream side of the safety valve (31), and the safety valve (31) is the lowered position of the direction control valve (3). It is possible to load in the direction of the overflow position by the pressure on the discharge side generated downstream of the safety valve (31) in (3b), and the safety valve (31) lowers the direction control valve (3) to the lowered position (3b). load due capable der in the direction of the control signal (Y) by flow-position load, actuator to actuate the safety valve (31) for the second consumer (2b) (36) is provided in The actuating device (36) has a first control surface (37a), the first control surface (37a) being on the supply side at the raised position (3c) of the directional control valve (3) And the pressure on the discharge side at the lowered position (3b) of the direction control valve (3). By a control signal (Y) that has a second control surface (37b), and the second control surface (37b) loads the directional control valve (3) to the lowered position (3b). The actuating device (36) is configured as a split actuating piston having a first piston (36a) and a second piston (36b), in which case the first piston (36a) The first control surface (37a) is configured, the second piston (36b) is configured with the second control surface (37b), and the second piston (36b) is configured with the first control surface (37b). the control surface (37a) a third control surface (37c) is configured to act on the opposite control surfaces of said 3 (37c) is characterized loadable der Rukoto by the pressure of the discharge side, the control Valve device.   The directional control valve (3) is disposed on the rising side (A) of the first consumer (2a), and the safety valve (9) for the first consumer (2a) is the first consumer. 2. The control valve device according to claim 1, wherein the control valve device is configured as a check valve that opens toward the ascending side of (2a) and can be unlocked.   From the first consumer (2a), between the directional control valve (3) and the safety valve (9) for the first consumer (2a), the second consumer (2b) 3. The control valve device according to claim 1, wherein a pressure medium connection conduit (29) is led to the safety valve (31).   4. The control valve device according to claim 1, wherein the safety valve (31) for the second consumer (2b) comprises a control cross section (35). The control according to any one of claims 1 to 4 , wherein the first control surface (37a) and the third control surface (37c) are connected to a tank via a throttle point (49). Valve device. A pressure safety device is provided on the rising side (A) of the second consumer (2b), the pressure safety device has a pressure control valve (42) adjusted to a safe pressure, and the pressure control valve (42) Can be loaded with the pressure generated on the rising side (A) of the second consumer (2b) on the inlet side, and the first control surface (37a) of the first piston (36a) on the outlet side. The control valve device according to any one of claims 1 to 5 , wherein the control valve device is connected to the control valve device. A control pressure conduit (38) is provided for loading the first control surface (37a) of the first piston (36a) and the third control surface (37c) of the second piston (36b). The control pressure conduit (38) is connected to the first control pressure conduit (40) via a shuttle valve (39), and the supply side of the control pressure conduit (40) is connected to the supply side at the raised position. Pressure is generated or pressure on the discharge side is generated at the lowered position and is connected to a second control pressure conduit (41), which is connected to the second control pressure conduit (41). The control valve device according to any one of claims 1 to 6 , which can be loaded with a safety pressure of the pressure control valve (42). The safety valve (31) for the second consumer (2b) has a control piston (60) for controlling a valve seat (63) configured in the casing hole (61), and the safety valve ( The control valve device according to any one of claims 1 to 7 , wherein the actuating device (36) for actuating 31) is arranged coaxially with respect to the casing hole (61). The casing hole (61) is connected to the first connection passage (65), the connection passage (65) leads to the connection portion (A1) connected to the pressure medium conduit (29), and the second consumer 9. The control valve device according to claim 8 , wherein the control valve device is connected to a second connection passage (66) leading to the ascending side (A) of (2b). The control pressure conduit (38) is connected to the outlet of the shuttle valve (39), the shuttle valve (39) is connected to the first control pressure conduit (40) on the inlet side, and the control The pressure conduit (40) is connected to the first connection passage (65) and to a second control pressure conduit (41) connected to the second connection passage (66). 9. The control valve device according to 9 . A check valve (46) is provided for controlling the opening of the safety valve (31) for the second consumer (2b), and the check valve (46) is opened by the actuating device (36). is operable to, at the open position, the control pressure chamber of the safety valve (31) acting in the direction of the locking position (69) is relieved to the tank, one of the claims 1 to 10 1 The control valve device according to item. A spring (55) of the safety valve (31) for the second consumer (2b) is disposed in the spring chamber (64), and the spring chamber (64) is connected to a tank passage (48). And the control valve device according to claim 11 . The check valve (46) is arranged in the longitudinal hole (70) of the control piston (60), the control hole (69) in which the longitudinal hole (70) acts towards the locking position. The control valve device according to claim 11 or 12 , wherein a lateral hole (71) led to the spring chamber (64) is connected to the longitudinal hole (70). A branch conduit (47) connected to the first control surface (37a) and the third control surface (37c) is connected to the tank passage (48), and a throttling part (47) is connected to the branch conduit (47). The control valve device according to claim 12 or 13 , wherein 49) is arranged. A pressure medium passage (8) between the directional control valve (3) and the safety valve (9) for the first consumer (2a) from the connection (A1) of the pressure medium connection conduit (29) 15. A control valve according to any one of claims 3 to 14 , wherein a pressure medium passage (30) connected to the pressure medium passage (30) is provided and a safety valve (75) is arranged in the pressure medium passage (30). apparatus. The safety valve (75) is configured as a shutoff valve, and the shutoff valve (75) is moved in the direction of the shutoff position (75a) by the pressure generated in the first consumer (2a) and the second consumer (2b). 16. The control valve device according to claim 15 , wherein a load can be applied in the direction of the flow-through position (75b) by the pressure generated by the spring and the spring (76). Jib is used to control the construction machine operable in Jibushirinda arranged in at least two parallel, control valve device according to any one of claims 1 to 16.

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