CN106574640B - Operating table fluid power system - Google Patents

Operating table fluid power system Download PDF

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Publication number
CN106574640B
CN106574640B CN201480080898.6A CN201480080898A CN106574640B CN 106574640 B CN106574640 B CN 106574640B CN 201480080898 A CN201480080898 A CN 201480080898A CN 106574640 B CN106574640 B CN 106574640B
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Prior art keywords
oil
circuit
cylinder
oil return
valve
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CN201480080898.6A
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CN106574640A (en
Inventor
邓强泉
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Nanjing Mindray Bio Medical Electronics Co Ltd
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Nanjing Mindray Bio Medical Electronics Co Ltd
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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
    • F15B11/22—Synchronisation of the movement of two or more servomotors
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G13/00—Operating tables; Auxiliary appliances therefor
    • A61G13/02—Adjustable operating tables; Controls therefor
    • A61G13/08—Adjustable operating tables; Controls therefor the table being divided into different adjustable sections
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G13/00—Operating tables; Auxiliary appliances therefor
    • A61G13/10—Parts, details or accessories
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G13/00—Operating tables; Auxiliary appliances therefor
    • A61G13/10—Parts, details or accessories
    • A61G13/12—Rests specially adapted therefor; Arrangements of patient-supporting surfaces
    • A61G13/1205—Rests specially adapted therefor; Arrangements of patient-supporting surfaces for specific parts of the body
    • A61G13/1245—Knees, upper or lower legs
    • 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
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30505—Non-return valves, i.e. check valves
    • F15B2211/3051—Cross-check 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
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/3056—Assemblies of multiple valves
    • F15B2211/30565—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve
    • F15B2211/3057—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-valve having two valves, one for each port of a double-acting output member
    • 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
    • F15B2211/3138—Directional control characterised by the positions of the valve element the positions being discrete
    • 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
    • F15B2211/315—Directional control characterised by the connections of the valve or valves in the circuit
    • F15B2211/31552—Directional control characterised by the connections of the valve or valves in the circuit being connected to an output member and a return line
    • F15B2211/31564—Directional control characterised by the connections of the valve or valves in the circuit being connected to an output member and a return line having multiple output members
    • 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
    • F15B2211/32—Directional control characterised by the type of actuation
    • F15B2211/327—Directional control characterised by the type of actuation electrically or electronically
    • 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
    • F15B2211/40507—Flow control characterised by the type of flow control means or valve with constant 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
    • F15B2211/415—Flow control characterised by the connections of the flow control means in the circuit
    • F15B2211/41527—Flow control characterised by the connections of the flow control means in the circuit being connected to an output member and a directional control valve
    • 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
    • F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
    • F15B2211/7051—Linear output members
    • F15B2211/7053—Double-acting output members
    • 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
    • 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
    • F15B2211/7114—Multiple output members, e.g. multiple hydraulic motors or cylinders with direct connection between the chambers of different actuators
    • F15B2211/7121—Multiple output members, e.g. multiple hydraulic motors or cylinders with direct connection between the chambers of different actuators the chambers being connected in series
    • 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
    • F15B2211/782—Concurrent control, e.g. synchronisation of two or more actuators

Landscapes

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

Abstract

A kind of operating table fluid power system.The system includes providing fueller, oil return apparatus and the oil return circuit component of hydraulic oil.Oil return circuit component includes two oil cylinders (261,262), two reversing valve assemblies and two bidirectional hydraulic locks.The rodless cavity (2611 of each oil cylinder, 2621) it is connect with a working interface of reversing valve assembly by the first oil circuit (31), the rod chamber (2612,2622) of each oil cylinder is connect by the second oil circuit (32) with another working interface of reversing valve assembly.One oil return opening of each reversing valve assembly is connect by oil return circuit (30) with oil return apparatus.Oil return circuit (30) is equipped with on-off control valve.First oil circuit (31) and the second oil circuit (32) all carry out two-way break-make control by bidirectional hydraulic lock.The system enables the piston rod of two oil cylinders (261,262) to move alone and move synchronously, and simplifies system structure, provides reliability, and reduces cost.

Description

Operating table fluid power system
Technical field
The present invention relates to a kind of operating table fluid power systems.
Background technology
Electric hydaulic operating table usually configures the function of hydraulic control driving both legs plate, not only to realize left and right leg plate list Solely action, will also realize both legs plate synchronization action；The steady reliable, synchronization action of low noise, control when also requirement acts simultaneously Precision height and net synchronization capability are good.Operating table is the general designation of operating table and operating bed.
Existing electric hydaulic operating table both legs plate hydraulic control driving method has following several：
A) three four-ways or five electric change valves are used, coordinates with three bidirectional hydraulic locks, two hydraulic control one-way valves, leads to It crosses the left and right concatenated mode of leg leaf fat cylinder, realizes left and right leg plate single movement and both legs plate synchronization action；
B) three groups of bi-bit bi-pass electromagnetic switch valves (every group includes two bi-bit bi-pass electromagnetic switch valves) are used, with two two Position two-way electromagnetic switch valve cooperation, by by the left and right concatenated mode of leg leaf fat cylinder, realizing left and right leg plate single movement and double Leg plate synchronization action；
C) two groups of two position, three-way electromagnetic change valves (every group includes two two position, three-way electromagnetic change valves) and two pairs are used Coordinate to hydraulic lock, it is same when needing by forming servo-control system with control unit with the angular transducer on every leg plate When step acts, need that two leg plate angular deviations are quickly fed back to control unit, control unit is again by controlling the fast of solenoid valve Speed switch eliminates the asynchronous deviation of two legs action in real time, realizes synchronization action；Left and right leg plate single movement can also be realized.
Invention content
The present invention provides a kind of new operating table fluid power system.
The present invention provides a kind of operating table fluid power system, has independently moving state and moves synchronously state, including It is capable of providing the fueller, oil return apparatus and cylinder circuit component of hydraulic oil, the cylinder circuit component includes two oil cylinders, Each oil cylinder have rodless cavity and the rod chamber with piston rod, the cylinder circuit component further include two reversing valve assemblies and Two bidirectional hydraulic locks, the oil cylinder, reversing valve assembly and bidirectional hydraulic lock correspond, and the rodless cavity of each oil cylinder passes through First oil circuit is connect with a working interface of the reversing valve assembly, and the rod chamber of each oil cylinder passes through the second oil circuit and institute Another working interface connection of reversing valve assembly is stated, the oil inlet of each reversing valve assembly is connect with the fueller, An oil return opening and the oil return apparatus of each reversing valve assembly are directly connected to, another time of each reversing valve assembly Hydraulic fluid port is connect by oil return circuit with the oil return apparatus, and the oil return circuit is equipped with on-off control valve, corresponding each oil cylinder First oil circuit and the second oil circuit two-way break-make control, an oil cylinder are carried out by the corresponding bidirectional hydraulic lock Rod chamber and the rodless cavity of another oil cylinder connect, in the independently moving state, the on-off control valve makes described Oil return circuit is connected；State is moved synchronously described, the on-off control valve makes the oil return circuit end.
Each oil inlet of two reversing valve assemblies is connect with fueller.In two oil return openings of each reversing valve assembly, One connect with oil return apparatus, and one is connect by the oil return circuit equipped with on-off control valve with oil return apparatus.
By the coordination control to each reversing valve assembly, bidirectional hydraulic lock and on-off control valve, two oil cylinder pistons are realized It the independently moving of bar and moves synchronously.
Each reversing valve assembly includes two two position, three-way electromagnetic change valves, each two position, three-way electromagnetic change valve tool There are one the oil inlet, an oil return opening and a working interfaces.
Each two position, three-way electromagnetic change valve is fixedly connected with one with on-off control valve, to constitute a control group Part.
Each reversing valve assembly includes a two-position five-way solenoid directional control valve, and there are one oil inlet, two work for tool Interface and two oil return openings.
Each bidirectional hydraulic lock includes two hydraulic control one-way valves, and two hydraulic control one-way valves are respectively arranged on described first Oil circuit and the second oil circuit, the oil pressure cntrol of first oil circuit are set to the hydraulic control one-way valve of second oil circuit, second oil The oil pressure cntrol on road is set to the hydraulic control one-way valve of first oil circuit.
Bidirectional hydraulic lock can realize the forward and reverse conducting of the first, second oil circuit and reversed cut-off.
The on-off control valve is bi-bit bi-pass electromagnetic switch valve or two position, three-way electromagnetic change valve.
The useful effect of the effective active area of the rodless cavity of one oil cylinder and the rod chamber of another oil cylinder Area is identical.
Each oil cylinder corresponds to a movable part of operating table, by the logic control to fluid power system each section, Realize the combination control of the multiple movable part actions of operating table.Movable part as leg plate or it is other need it is synchronous, individually control Component.
It is equipped with the throttling set that can adjust flow on first oil circuit and the second oil circuit.Throttling set
Such as nominal throttling bolt, throttle grverning valve or other devices that can realize flow-rate adjustment, and then realize to piston The adjusting of bar movement velocity and operating bed any action movement velocity.
A kind of operating table fluid power system has independently moving state and moves synchronously state, including is capable of providing liquid Fueller, oil return apparatus and the cylinder circuit component of pressure oil, the cylinder circuit component include two oil cylinders, each oil cylinder Rodless cavity and the rod chamber with piston rod are all had, the cylinder circuit component further includes that two reversing valve assemblies and two are two-way Hydraulic lock, the oil cylinder, reversing valve assembly and bidirectional hydraulic lock correspond, and each reversing valve assembly includes two two Three-way solenoid valve, each two position, three-way electromagnetic change valve all have an oil inlet, an oil return opening and a job Interface；Each oil inlet is connect with the fueller；For each reversing valve assembly, a two-position three way electricity The working interface of magnetic reversal valve passes through the first oil circuit connection, another described two-position three way with the rodless cavity of the corresponding oil cylinder The working interface of solenoid directional control valve passes through the second oil circuit connection with the rod chamber of the corresponding oil cylinder；Two oil cylinder difference Left oil cylinder and right oil cylinder, the oil return opening for the two position, three-way electromagnetic change valve being connect with the right oil cylinder rodless cavity with it is described Oil return apparatus is directly connected to, and the oil return opening for the two position, three-way electromagnetic change valve being connect with the right cylinder rod chamber is by returning Oil circuit is connect with the oil return apparatus；The oil return for the two position, three-way electromagnetic change valve being connect with the left oil cylinder rodless cavity Mouth is directly connected to by the oil return circuit and the oil return apparatus, the two-position three way being connect with the left cylinder rod chamber The oil return opening of solenoid directional control valve is directly connected to the oil return apparatus；The oil return circuit is equipped with on-off control valve, corresponding each institute First oil circuit and the second oil circuit for stating oil cylinder carry out two-way break-make control, the right side by the corresponding bidirectional hydraulic lock The rodless cavity of the rod chamber of oil cylinder and the left oil cylinder is connected, and in the independently moving state, the on-off control valve makes described Oil return circuit is connected；State is moved synchronously described, the on-off control valve makes the oil return circuit end.Right oil cylinder rodless cavity Effective active area can be equal with the effective active area of left cylinder rod chamber.
In a kind of alternative, the oil return for the two position, three-way electromagnetic change valve being connect with the left oil cylinder rodless cavity Mouth is directly connected to the oil return apparatus, the oil return for the two position, three-way electromagnetic change valve being connect with the left cylinder rod chamber Mouth is connect by oil return circuit with the oil return apparatus；The two-position three-way electromagnetic commutation being connect with the right oil cylinder rodless cavity The oil return opening of valve is connect by the oil return circuit with the oil return apparatus, described two connect with the right cylinder rod chamber The oil return opening of three-way solenoid valve is directly connected to the oil return apparatus.The effective active area of left oil cylinder rodless cavity can be with The effective active area of right cylinder rod chamber is equal.
The beneficial effects of the invention are as follows：
1) two reversing valve assemblies, two bidirectional hydraulic locks and an on-off control valve are only set, you can realize to two The independently moving of cylinder piston rod controls and Synchronous motion control, simplifies the structure of fluid power system, improves reliability And cost can be reduced.
2) each two position, three-way electromagnetic change valve and on-off control valve can be fixed as one, and form integrated module, make hydraulic pressure The structure of drive system is compacter, reduces volume, the installation convenient for whole system and total arrangement.
Description of the drawings
Fig. 1 is the structure principle chart of the first specific implementation mode of operating table fluid power system；
Fig. 2 is the structure principle chart of the second specific implementation mode of operating table fluid power system；
Fig. 3 and Fig. 4 is the bi-bit bi-pass electromagnetic switch valve and two position, three-way electromagnetic change valve group of the first specific implementation mode Unify the right view and front view after body；
Fig. 5 and Fig. 6 is the bi-bit bi-pass electromagnetic switch valve and two position, three-way electromagnetic change valve group of the second specific implementation mode Unify the right view and front view after body.
Specific implementation mode
As shown in Figures 1 and 2, operating table fluid power system includes fueller, oil return apparatus and cylinder circuit component. Fueller is capable of providing hydraulic oil.Oil return apparatus can recycle hydraulic oil.Cylinder circuit component include two oil cylinders 261, 262, two reversing valve assemblies and two bidirectional hydraulic locks, and oil cylinder, reversing valve assembly and bidirectional hydraulic lock correspond.Oil cylinder Rod chamber 2612,2622 with rodless cavity 2611,2621 and with piston rod 2613,2623.Reversing valve assembly can have One or two oil inlet, two oil return openings and two working interfaces, one of working interface are connected by the first oil circuit 31 Rodless cavity 2611,2621, another working interface connect rod chamber 2612,2622 by the second oil circuit 32.First oil circuit, 31 He Second oil circuit 32 carries out break-make control by bidirectional hydraulic lock, and the first, second oil circuit is enable to realize the forward and reverse flowing of hydraulic oil With reversed cut-off.The oil inlet of each reversing valve assembly is connect with fueller, an oil return opening of each reversing valve assembly and oil return Device is directly connected to, another oil return opening of each reversing valve assembly is connect by oil return circuit 30 with oil return apparatus.Oil return circuit 30 carry out break-make control by on-off control valve, and when conducting, hydraulic oil can flow through the oil return circuit 30；When cut-off, hydraulic oil is not The oil return circuit 30 can be flowed through.
Each reversing valve assembly, each bidirectional hydraulic lock and on-off control valve carry out coordination control by master control set, make the hand Art platform fluid power system has independently moving state and moves synchronously state, which can mutually switch.
In independently moving state, on-off control valve makes oil return circuit 30 be connected.In self-movement state, can realize to two The independent control of a oil cylinder.By taking one of oil cylinder as an example, when piston rod 2613 being needed to stretch out, the hydraulic oil of fueller is logical The rodless cavity 2611 that the first oil circuit 31 flows into oil cylinder 261 is crossed, the hydraulic oil in rod chamber 2612 passes through the second oil circuit 32, oil return oil Oil return apparatus is flowed back on road 30；When piston rod 2613 being needed to retract, the hydraulic oil of fueller flows into oil cylinder by the second oil circuit 32 261 rod chamber 2612, the hydraulic oil in rodless cavity 2611 flow back to oil return apparatus by the first oil circuit 31.
In the state of moving synchronously, on-off control valve makes oil return circuit 30 end.In the state of moving synchronously, can realize to two The synchronous control of a oil cylinder 261,262.When piston rod 2613,2623 being needed to synchronize stretching, the hydraulic oil of fueller passes through one A first oil circuit 31 flows into the rodless cavity 2611 of an oil cylinder 261, and the hydraulic oil in the rod chamber 2612 of the oil cylinder 261 passes through the Two oil circuits 32, another first oil circuit 31 flow into the rodless cavity 2621 of another oil cylinder 262, the rod chamber of another oil cylinder 2622 hydraulic oil flows back to oil return apparatus；When piston rod being needed to synchronize retraction, the hydraulic oil of fueller passes through one second oil Road 32 flows into the rod chamber 2622 of an oil cylinder 262, and the hydraulic oil in the rodless cavity 2621 of the oil cylinder 262 passes through one first oil Road 31, another second oil circuit 32 flow into the rod chamber 2612 of another oil cylinder 261, the rodless cavity of another oil cylinder 261 2611 hydraulic oil flows back to oil return apparatus.
As shown in Figure 1, it is the first specific implementation mode of operating table fluid power system.
Operating table fluid power system includes fueller, oil return apparatus, two oil cylinders 261,262, two groups of two-position three ways Solenoid directional control valve and two bidirectional hydraulic locks.Fueller is capable of providing hydraulic oil, with oil outlet P.Oil return apparatus can Hydraulic oil is recycled, with hydraulic fluid port T, the oil return apparatus such as fuel tank.Oil cylinder 261,262 has rodless cavity 2611,2621 and with work The rod chamber 2612,2622 of stopper rod 2613,2623.One group of two position, three-way electromagnetic change valve of corresponding oil cylinder 261 includes two two One group of two position, three-way electromagnetic change valve of position three-way solenoid valve 202,203, corresponding oil cylinder 262 includes two two-position three way electricity Magnetic reversal valve 204,205.There are one oil inlet, an oil return opening and a working interfaces for each two position, three-way electromagnetic change valve tool. In two working interfaces of every group of two-position three way magnetic valve, a working interface connects the rodless cavity of oil cylinder by the first oil circuit 31 2611,2621, another working interface connects the rod chamber 2612,2622 of oil cylinder by the second oil circuit 32.Every group of two-position three way Two oil inlets of solenoid directional control valve are connect with fueller, in two oil return openings of every group of two position, three-way electromagnetic change valve, One oil return opening is directly connected to oil return apparatus, another oil return opening is connect by oil return circuit 30 with oil return apparatus.Oil return oil Road is equipped with bi-bit bi-pass electromagnetic switch valve 201.
Each bidirectional hydraulic lock includes two hydraulic control one-way valves 221,222, and two hydraulic control one-way valves 221,222 are respectively provided at On first oil circuit 31, the second oil circuit 32.The hydraulic control one-way valve 222 of the second oil circuit of oil pressure cntrol 32 of first oil circuit 31, the second oil The hydraulic control one-way valve 221 of first oil circuit of oil pressure cntrol 31 on road 32.
Two oil cylinders can control the left leg plate of operating table and right leg plate respectively.Hydraulic oil is exported from oil outlet P, with two The oil inlet of three-way solenoid valve 202,203,204,205 communicates, and two position, three-way electromagnetic change valve oil inlet has filter screen can Hydraulic oil to entering spool is filtered, hydraulic oil-returning and bi-bit bi-pass electromagnetic switch valve 201, two position, three-way electromagnetic change valve 202,204 oil return opening communicates, and fuel tank is flowed back to through hydraulic fluid port T；The rise and fall of left and right leg plate are respectively by corresponding leg leaf fat cylinder The stretching of piston rod drives with retract action.
One, individually control is as follows with driving method for left and right leg plate：
1, left leg plate rises：Two position, three-way electromagnetic change valve 202 is powered, and spool is in left position work function, hydraulic pressure at this time Oil opens hydraulic control one-way valve 221,222 by spool, flows through the rodless cavity 2611 for entering left leg leaf fat cylinder 261 after throttle orifice 241, Simultaneously because hydraulic control one-way valve 222 has been opened, piston rod 2613 can be driven by entering the hydraulic oil of the rodless cavity 2611 of oil cylinder 261 at this time Movement is stretched out, the hydraulic oil in the rod chamber 2612 of oil cylinder 261 flows through hydraulic control one-way valve 222, then is changed by two-position three-way electromagnetic To the left position of valve 203 work function outflow, while bi-bit bi-pass electromagnetic switch valve 201 be powered, hydraulic oil through right position work function, Fuel tank is flowed back to through hydraulic fluid port T, constitutes a complete circuit.
2, left leg plate declines：Two position, three-way electromagnetic change valve 203 is powered, and spool is in right position work function, hydraulic pressure at this time Oil opens hydraulic control one-way valve 222,221 by spool, subsequently into the rod chamber 2612 of left leg leaf fat cylinder 261, while because of hydraulic control Check valve 221 has been opened, and is entered the hydraulic oil of the rod chamber 2612 of oil cylinder 261 at this time and can be driven 2613 retraction movement of piston rod, Hydraulic oil in the rodless cavity 2611 of oil cylinder 261 passes through two-position three-way electromagnetic followed by throttle orifice 241, hydraulic control one-way valve 221 The right position work function outflow of reversal valve 202, flows back to fuel tank through hydraulic fluid port T, constitutes a complete circuit.
3, right leg plate rises：Two position, three-way electromagnetic change valve 205 is powered, and spool is in right position work function, hydraulic pressure at this time Oil opens hydraulic control one-way valve 224,223 by spool, flows through the rodless cavity 2621 for entering right leg leaf fat cylinder 262 after throttle orifice 242, Simultaneously because hydraulic control one-way valve 223 has been opened, piston rod 2623 can be driven by entering the hydraulic oil of the rodless cavity 2621 of oil cylinder 262 at this time Movement is stretched out, the hydraulic oil in the rod chamber 2622 of oil cylinder flows through hydraulic control one-way valve 223, then passes through two position, three-way electromagnetic change valve 204 right position work function outflow, flows back to fuel tank through hydraulic fluid port T, constitutes a complete circuit.
4, right leg plate declines：Two position, three-way electromagnetic change valve 204 is powered, and spool is in left position work function, hydraulic pressure at this time Oil opens hydraulic control one-way valve 223,224 by spool, subsequently into the rod chamber 2622 of left leg leaf fat cylinder 262, while because of hydraulic control Check valve 224 has been opened, and is entered the hydraulic oil of the rod chamber 2622 of oil cylinder 262 at this time and can be driven 2623 retraction movement of piston rod, Hydraulic oil in the rodless cavity 2621 of oil cylinder is followed by throttle orifice 242, hydraulic control one-way valve 224, two position, three-way electromagnetic change valve 205 left position work function, while bi-bit bi-pass electromagnetic switch valve 201 is powered, hydraulic oil is through its right position work function, through hydraulic fluid port T flows back to fuel tank, constitutes a complete circuit.
Two, left and right leg plate synchronous control and driving method are as follows：
2612 effective active area of rod chamber of left leg leaf fat cylinder 261 has with the rodless cavity 2621 of right leg leaf fat cylinder 262 It is equal to imitate active area.
1, two leg plates, which synchronize, rises：Two position, three-way electromagnetic change valve 202 is powered, its spool is in left position working machine at this time Can, hydraulic oil opens hydraulic control one-way valve 221,222 by spool, flow through enter after throttle orifice 241 left leg leaf fat cylinder 261 without bar Chamber 2611, while because hydraulic control one-way valve 222 has been opened, work can be driven by entering the hydraulic oil of the rodless cavity 2611 of oil cylinder 261 at this time Stopper rod 2613 stretches out movement, while bi-bit bi-pass electromagnetic switch valve 201 powers off, and is flowed through from the interior hydraulic oil flowed out of rod chamber 2612 After the left position work function of two position, three-way electromagnetic change valve 203, can not work function through 201 right position of bi-bit bi-pass electromagnetic switch valve To hydraulic fluid port T, can only work function through the left position of two position, three-way electromagnetic change valve 205, open hydraulic control one-way valve 224,223, then flow Enter the rodless cavity 2621 of right leg leaf fat cylinder 262 after throttle orifice 242, while because hydraulic control one-way valve 223 has been opened, entering at this time The hydraulic oil of the rodless cavity 2621 of oil cylinder 262 can drive piston rod 2623 while stretch out movement, in the rod chamber 2622 of oil cylinder Hydraulic oil flows through hydraulic control one-way valve 223, then by the right position work function outflow of two position, three-way electromagnetic change valve 204, through hydraulic fluid port T Fuel tank is flowed back to, a complete circuit is constituted；The rodless cavity of the rod chamber 2612 of left leg leaf fat cylinder 261 and right leg leaf fat cylinder 262 2621 series connection are synchronized by the right leg leaf fat cylinder of left leg plate hydraulic oil cylinder driving and stretch out movement.
2, two leg plates, which synchronize, declines：Two position, three-way electromagnetic change valve 204 is powered, and spool is in right position work function at this time, Hydraulic oil opens hydraulic control one-way valve 223,224 by spool, subsequently into the rod chamber 2622 of right leg leaf fat cylinder 262, while because Hydraulic control one-way valve 224 has been opened, and is entered the hydraulic oil of the rod chamber 2622 of oil cylinder 262 at this time and can be driven the retraction fortune of piston rod 2623 It is dynamic, from the interior hydraulic oil flowed out of rodless cavity 2621 followed by throttle orifice 242, hydraulic control one-way valve 224, two-position three-way electromagnetic commutation After the left position work function of valve 205, because bi-bit bi-pass electromagnetic switch valve 201 powers off, hydraulic oil can not be opened through bi-bit bi-pass electromagnetism It closes 201 right position of valve and works function to hydraulic fluid port T, can only work function through the left position of two position, three-way electromagnetic change valve 203, open hydraulic control Check valve 222,221 passes through the rod chamber 2612 for entering left leg leaf fat cylinder 261 after throttle orifice 241, while because of hydraulic control one-way valve 221 have opened, and enter the hydraulic oil of the rod chamber 2611 of oil cylinder 261 at this time and piston rod 2613 can be driven to retract at the same time movement, oily Hydraulic oil in the rodless cavity 2611 of cylinder 261 is followed by throttle orifice 241, hydraulic control one-way valve 221, then passes through two-position three-way electromagnetic The right position work function outflow of reversal valve 202, flows back to fuel tank through hydraulic fluid port T, constitutes a complete circuit；Right leg leaf fat cylinder 262 Rodless cavity 2621 connect with the rod chamber 2612 of left leg leaf fat cylinder 261, contracting is synchronized by the left leg leaf fat cylinder of right leg plate hydraulic oil cylinder driving It backhauls dynamic.
Fig. 2 is the second specific implementation mode of operating table fluid power system, main with the first specific implementation mode Difference lies in：When two leg plates move synchronously, 2611 effective active area of rodless cavity and the right leg leaf fat cylinder of left leg leaf fat cylinder 261 262 2622 effective active area of rod chamber is equal, is synchronized by the left leg leaf fat cylinder of right leg plate hydraulic oil cylinder driving and stretches out movement, by left leg The right leg leaf fat cylinder of plate hydraulic oil cylinder driving synchronizes retraction movement.
It can realize that any leg plate independently moving of operating bed or two leg plates move synchronously by above-mentioned logic control method, if The pendulum position (or any position state) of operating bed is maintained, hydraulic circuit where the leg leaf fat cylinder of the driving action need to be only made Two position, three-way electromagnetic change valve be in off-position, hydraulic control one-way valve is in reverse blocking state at this time, can be by leg leaf fat cylinder Rodless cavity and rod chamber in hydraulic oil be in one sealing closed chamber in nowhere flow, can make this operation bed leg plate this pendulum position It is in stable condition reliably to maintain.
As shown in Figures 3 to 6, oil connection 10 and oil pipe are used for realizing the company between oil cylinder and valve or valve and hydraulic pump It connects, bi-bit bi-pass electromagnetic switch valve 201 combines composition operation bed leg plate with two position, three-way electromagnetic change valve 202,203,204,205 Control valve group, screw 14,16, which is used for connecting valve group, to be fastened.
For operating table hydraulic control drive system, using two groups of two position, three-way electromagnetic change valves, (every group includes two Two position, three-way electromagnetic change valve) and two bidirectional hydraulic locks (each bidirectional hydraulic lock is made of two hydraulic control one-way valves), cooperation One bi-bit bi-pass electromagnetic switch valve, by by the concatenated mode of left and right leg leaf fat cylinder, realizing left and right leg plate single movement and same Step acts.The movement velocity of operating table leg plate can be realized by controlling the output flow of fueller (such as hydraulic pump), also may be used To be realized by the throttle orifice size that throttle grverning valve or nominal throttling bolt are arranged on cylinder circuit.The work of operating table leg plate Making pressure can be realized by the hydraulic pump of carry potential overflow valve.
For operating table hydraulic control drive system, every group of two position, three-way electromagnetic change valve can be by a two-position five-way electricity Magnetic reversal valve is replaced, and five interfaces can be separately connected the first oil circuit, the second oil circuit, fueller, oil return apparatus and break-make Control valve.On-off control valve can be switch valve, such as bi-bit bi-pass electromagnetic switch valve；Can also be reversal valve, such as two-position three way Solenoid directional control valve.
The above content is combining, specific embodiment is made for the present invention to be further described, and it cannot be said that this hair Bright specific implementation is confined to these explanations.For those of ordinary skill in the art to which the present invention belongs, it is not taking off Under the premise of from present inventive concept, a number of simple deductions or replacements can also be made.

Claims (12)

1. a kind of operating table fluid power system has independently moving state and moves synchronously state, including is capable of providing hydraulic pressure Fueller, oil return apparatus and the cylinder circuit component of oil, the cylinder circuit component include two oil cylinders, each oil cylinder tool Have rodless cavity and the rod chamber with piston rod, which is characterized in that the cylinder circuit component further include two reversing valve assemblies and Two bidirectional hydraulic locks, the oil cylinder, reversing valve assembly and bidirectional hydraulic lock correspond, and the rodless cavity of each oil cylinder passes through First oil circuit is connect with a working interface of the reversing valve assembly, and the rod chamber of each oil cylinder passes through the second oil circuit and institute Another working interface connection of reversing valve assembly is stated, the oil inlet of each reversing valve assembly is connect with the fueller, An oil return opening and the oil return apparatus of each reversing valve assembly are directly connected to, another time of each reversing valve assembly Hydraulic fluid port is connect by oil return circuit with the oil return apparatus, and the oil return circuit is equipped with on-off control valve, corresponding each oil cylinder First oil circuit and the second oil circuit two-way break-make control, an oil cylinder are carried out by the corresponding bidirectional hydraulic lock Rod chamber and the rodless cavity of another oil cylinder connect, in the independently moving state, the on-off control valve makes described Oil return circuit is connected；State is moved synchronously described, the on-off control valve makes the oil return circuit end.
2. operating table fluid power system as described in claim 1, which is characterized in that each reversing valve assembly includes two Two position, three-way electromagnetic change valve, there are one the oil inlet, an oil return openings for each two position, three-way electromagnetic change valve tool With a working interface.
3. operating table fluid power system as claimed in claim 2, which is characterized in that each two position, three-way electromagnetic change valve It is connected to one with on-off control valve.
4. operating table fluid power system as described in claim 1, which is characterized in that each reversing valve assembly includes one Two-position five-way solenoid directional control valve.
5. operating table fluid power system as described in claim 1, which is characterized in that each bidirectional hydraulic lock includes two Hydraulic control one-way valve, two hydraulic control one-way valves are respectively arranged on first oil circuit and the second oil circuit, the oil of first oil circuit Voltage-controlled to set up in the hydraulic control one-way valve of second oil circuit, the oil pressure cntrol of second oil circuit is set to the liquid of first oil circuit Control check valve.
6. operating table fluid power system as described in claim 1, which is characterized in that the on-off control valve is bi-bit bi-pass Electromagnetic switch valve or two position, three-way electromagnetic change valve.
7. operating table fluid power system as described in claim 1, which is characterized in that the rodless cavity of an oil cylinder has It is identical as the effective active area of the rod chamber of oil cylinder described in another to imitate active area.
8. operating table fluid power system as described in claim 1, which is characterized in that on first oil circuit and the second oil circuit The throttling set of flow can be adjusted by being equipped with.
9. a kind of operating table fluid power system has independently moving state and moves synchronously state, including is capable of providing hydraulic pressure Fueller, oil return apparatus and the cylinder circuit component of oil, the cylinder circuit component include two oil cylinders, and each oil cylinder is equal Rod chamber with rodless cavity and with piston rod, which is characterized in that the cylinder circuit component further includes two reversing valve assemblies And two bidirectional hydraulic locks, the oil cylinder, reversing valve assembly and bidirectional hydraulic lock correspond, each reversing valve assembly wraps Two two position, three-way electromagnetic change valves are included, each two position, three-way electromagnetic change valve all has an oil inlet, an oil return opening With a working interface；Each oil inlet is connect with the fueller；For each reversing valve assembly, described in one The working interface of two position, three-way electromagnetic change valve passes through the first oil circuit connection, another institute with the rodless cavity of the corresponding oil cylinder The working interface for stating two position, three-way electromagnetic change valve passes through the second oil circuit connection with the rod chamber of the corresponding oil cylinder；Two institutes It is left oil cylinder and right oil cylinder to state oil cylinder respectively, and the two position, three-way electromagnetic change valve being connect with the left oil cylinder rodless cavity returns Hydraulic fluid port is directly connected to the oil return apparatus, and the two position, three-way electromagnetic change valve being connect with the left cylinder rod chamber returns Hydraulic fluid port is connect by oil return circuit with the oil return apparatus；The two-position three-way electromagnetic being connect with the right oil cylinder rodless cavity changes It is connect to the oil return opening of valve with the oil return apparatus by the oil return circuit, described two connect with the right cylinder rod chamber The oil return opening of position three-way solenoid valve is directly connected to the oil return apparatus；The oil return circuit is equipped with on-off control valve, right First oil circuit and the second oil circuit for answering each oil cylinder carry out two-way break-make control by the corresponding bidirectional hydraulic lock, The rodless cavity of the rod chamber of the left oil cylinder and the right oil cylinder is connected, in the independently moving state, the on-off control valve The oil return circuit is set to be connected；State is moved synchronously described, the on-off control valve makes the oil return circuit end.
10. operating table fluid power system as claimed in claim 9, which is characterized in that the left cylinder rod chamber it is effective Active area is equal with the effective active area of right oil cylinder rodless cavity.
11. a kind of operating table fluid power system has independently moving state and moves synchronously state, including is capable of providing hydraulic pressure Fueller, oil return apparatus and the cylinder circuit component of oil, the cylinder circuit component include two oil cylinders, and each oil cylinder is equal Rod chamber with rodless cavity and with piston rod, which is characterized in that the cylinder circuit component further includes two reversing valve assemblies And two bidirectional hydraulic locks, the oil cylinder, reversing valve assembly and bidirectional hydraulic lock correspond, each reversing valve assembly wraps Two two position, three-way electromagnetic change valves are included, each two position, three-way electromagnetic change valve all has an oil inlet, an oil return opening With a working interface；Each oil inlet is connect with the fueller；For each reversing valve assembly, described in one The working interface of two position, three-way electromagnetic change valve passes through the first oil circuit connection, another institute with the rodless cavity of the corresponding oil cylinder The working interface for stating two position, three-way electromagnetic change valve passes through the second oil circuit connection with the rod chamber of the corresponding oil cylinder；Two institutes It is left oil cylinder and right oil cylinder to state oil cylinder respectively, and the two position, three-way electromagnetic change valve being connect with the right oil cylinder rodless cavity returns Hydraulic fluid port is directly connected to the oil return apparatus, and the two position, three-way electromagnetic change valve being connect with the right cylinder rod chamber returns Hydraulic fluid port is connect by oil return circuit with the oil return apparatus；The two-position three-way electromagnetic being connect with the left oil cylinder rodless cavity changes It is directly connected to the oil return opening of valve by the oil return circuit and the oil return apparatus, the institute being connect with the left cylinder rod chamber The oil return opening and the oil return apparatus for stating two position, three-way electromagnetic change valve are directly connected to；The oil return circuit is controlled equipped with break-make Valve, first oil circuit and the second oil circuit of corresponding each oil cylinder carry out two-way break-make by the corresponding bidirectional hydraulic lock The rodless cavity series connection of control, the rod chamber of the right oil cylinder and the left oil cylinder, in the independently moving state, the break-make control Valve processed makes the oil return circuit be connected；State is moved synchronously described, the on-off control valve makes the oil return circuit end.
12. operating table fluid power system as claimed in claim 11, which is characterized in that the right cylinder rod chamber it is effective Active area is equal with the effective active area of left oil cylinder rodless cavity.
CN201480080898.6A 2014-10-23 2014-10-23 Operating table fluid power system Active CN106574640B (en)

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Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106930992B (en) * 2017-03-28 2018-07-06 四川万冠液压技术股份有限公司 A kind of oil cylinder displacement synchronous control realizes the control system of platform gyration
CN107605843A (en) * 2017-10-12 2018-01-19 徐州徐工随车起重机有限公司 A kind of electro-hydraulic leveling valve group of multifunctional working bucket
CN107795535A (en) * 2017-11-28 2018-03-13 湖南星邦重工有限公司 A kind of scissor aerial work platform and its floating hydraulic control system
CN107795532A (en) * 2017-11-28 2018-03-13 湖南星邦重工有限公司 A kind of scissor aerial work platform and its floating hydraulic control system
CN107830001B (en) * 2017-11-28 2023-10-27 湖南星邦智能装备股份有限公司 Scissor fork type aerial work platform and hydraulic system thereof
TWI735863B (en) * 2019-04-10 2021-08-11 明基三豐醫療器材股份有限公司 Operating table and hydraulic drive using the same thereof
CN109989954B (en) * 2019-04-18 2024-04-05 广西玉柴专用汽车有限公司 Sequential control hydraulic system and control method thereof
CN110259753A (en) * 2019-06-28 2019-09-20 金川集团股份有限公司 A kind of supporting leg automatic leveling hydraulic valve
CN110905871A (en) * 2019-12-16 2020-03-24 广东志成电液科技有限公司 Bus type electro-hydraulic cylinder with mechanical locking function and control method thereof
CN111550456B (en) * 2020-05-09 2024-06-07 中国船舶集团有限公司第七一六研究所 Hydraulic control system for emergency release device
CN113503276A (en) * 2020-09-23 2021-10-15 南京迈瑞生物医疗电子有限公司 Hydraulic control system of medical bed, medical bed and control method
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CN115342091A (en) 2021-05-12 2022-11-15 哈威油液压技术(无锡)有限公司 Hydraulic control system
CN113983015B (en) * 2021-10-12 2024-04-12 中国煤炭科工集团太原研究院有限公司 Hydraulic control system and method for double cutting arms of heading machine
CN115405580A (en) * 2022-09-26 2022-11-29 三一海洋重工有限公司 Oil cylinder system, cargo boom and crane

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL9200686A (en) * 1992-04-13 1993-11-01 Stertil Bv APPARATUS WITH SIMULTANEOUS HYDRAULIC JACKS.
DE10028652C1 (en) * 2000-06-09 2002-02-28 Schmitz & Soehne Gmbh & Co Kg Hydraulic system for a table having several hydraulic consumers, in particular an operating table
JP2002144943A (en) * 2000-11-14 2002-05-22 Shinmeiwa Auto Engineering Ltd Cylinder synchronous device of gate lifter
US6886200B2 (en) * 2001-01-25 2005-05-03 Hill-Rom Services, Inc. Hydraulic actuator apparatus for a surgical table
EP1297812A1 (en) * 2001-10-01 2003-04-02 Hoerbiger Micro Fluid GmbH Adjustable patient-supporting device
CN100479783C (en) * 2006-03-13 2009-04-22 郑大新 Multifunctional hydraulic actuating bed for animals
CN101975202B (en) * 2010-10-15 2013-07-24 马鞍山钢铁股份有限公司 Control method of hydraulic cylinder synchronous control system
CN202251171U (en) * 2011-09-05 2012-05-30 三一汽车起重机械有限公司 Motion control device of cylinders in series
CN102705275B (en) * 2012-06-25 2014-12-17 三一重工股份有限公司 Hydraulic control system for bolt and engineering machinery
CN203146462U (en) * 2013-03-15 2013-08-21 金川集团股份有限公司 Copper unit reshaping synchronous control hydraulic loop
CN103486104A (en) * 2013-09-09 2014-01-01 苏州柯尔医疗器械有限公司 Synchronous hydraulic system of surgical bed
CN203627352U (en) * 2013-10-21 2014-06-04 湖北华舟重工应急装备股份有限公司 Hydraulic control system of three-dimensional adjustment machine
CN203604293U (en) * 2013-11-28 2014-05-21 中联重科股份有限公司 Engineering mechanical equipment and hydraulic control circuit thereof
CN203614480U (en) * 2013-12-13 2014-05-28 中交西安筑路机械有限公司 Hydraulic control system for pavement paver leveling

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