CN106402076B - Integrated valve group, fluid power system and concrete pump - Google Patents
Integrated valve group, fluid power system and concrete pump Download PDFInfo
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- CN106402076B CN106402076B CN201611092371.2A CN201611092371A CN106402076B CN 106402076 B CN106402076 B CN 106402076B CN 201611092371 A CN201611092371 A CN 201611092371A CN 106402076 B CN106402076 B CN 106402076B
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- actuator port
- oil
- control valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
Abstract
The invention discloses a kind of integrated valve group, fluid power system and concrete pump, the integrated valve group includes valve plate and the main oil inlet being arranged on valve plate, guide's oil inlet, oil return opening, the first actuator port, the second actuator port, the first main control valve, sub-control valve, the first holding valve, the second holding valve and four check valves, and details the connected relation between each element.In work, the Switch of working position of the first main control valve, executing agency's corresponding actions that controllable first actuator port, the second actuator port are connected；The Switch of working position of sub-control valve; two shuttle valves that can be made up of four check valves; select the maximum oil pressure of main oil inlet, guide's oil inlet, the first actuator port and the second actuator port; flowing into first keeps valve and second to keep the control mouth of valve; valve and second is kept to keep the A mouths and B mouths of valve with locked first; make its hydraulic oil pressure difference stable, prevent from causing executing agency's maloperation in the presence of external loading because of hydraulic fluid leak after shutting down.
Description
Technical field
The present invention relates to Hydraulic Field, more particularly to a kind of integrated valve group, fluid power system and concrete pump.
Background technology
Fluid power system is engineering machinery " heart " as most important work system in engineering machinery, its function
Purposes can be realized by integrated valve group.Integrated valve group of the prior art, it is only capable of controlling the motion state of executing agency, it is quiet to its
Only state does not possess holding function.By taking the arm support pitching motion for controlling concrete mixer as an example, when arm support is in the control of integrated valve group
Under system, during in a certain luffing angle, arm support may be caused to be fallen in the presence of self gravitation, made due to hydraulic fluid leak
Into maloperation, the loading of arm support or its suspention is damaged, or even causes security incident.And for example, concrete pumping equipment conveying is driven
The master cylinder of cylinder, standby or stopped status is in concrete pumping equipment, the concrete in delivery pipe may acting in opposition in
The concrete piston of conveying cylinder, so as to drive master cylinder to act, influence the commutation of master cylinder.
Therefore, how a kind of integrated valve group is provided, its inactive state is kept when executing agency is static, avoids its maloperation
It is a technical problem urgently to be resolved hurrily at present.
The content of the invention
In view of this, the present invention proposes a kind of integrated valve group, including valve plate and be arranged on the valve plate main oil inlet,
Guide's oil inlet, oil return opening, the first actuator port, the second actuator port, the first main control valve, sub-control valve, first keep valve,
Second keeps valve and four check valves；
P mouths, the T mouths of first main control valve, are connected with the main oil inlet, the oil return opening respectively；Described first
A mouths, the B mouths of main control valve, the A mouths of valve are kept to connect with the described first holding valve, described second respectively；Described first keeps
Valve, the B mouths of the second holding valve connect with first actuator port, second actuator port respectively；
The entrance of four check valves, respectively with the main oil inlet, guide's oil inlet, first working oil
Mouth connects with second actuator port；After the outlet of four check valves, connected with the P mouths of the sub-control valve；
The A mouths of the sub-control valve, connected with the control mouth of the described first holding valve, the second holding valve；The T of the sub-control valve
Mouthful, connected with the oil return opening.
Further, the integrated valve group, in addition to the second main control valve, the 3rd actuator port and the 4th actuator port；
P mouths, T mouths, A mouths, the B mouths of second main control valve, respectively with the main oil inlet, oil return opening, described
3rd actuator port connects with the 4th actuator port.
Further, the integrated valve group, in addition to the 3rd holding valve；Described 3rd keeps A mouths, B mouths and the control of valve
Mouthful, the A mouths with the 3rd actuator port, the 4th actuator port and the sub-control valve connect respectively.
Further, first main control valve is 3-position 4-way pilot operated valve device；The integrated valve group also includes：First left position
Reversal valve, the first right position switching valve；The P mouths of the first left position switching valve and the first right position switching valve, with the elder generation
Lead oil inlet connection；The A mouths of the first left position switching valve and the first right position switching valve, respectively with first main control
The left hydraulic control mouth of valve, the connection of right hydraulic control mouth；The T mouths of the first left position switching valve and the first right position switching valve, it is and described
Oil return opening connects；
Or/and second main control valve is 3-position 4-way pilot operated valve device；The integrated valve group also includes：Second left position is changed
To valve, the second right position switching valve；The P mouths of the second left position switching valve and the second right position switching valve, with the guide
Oil inlet connects；The A mouths of the second left position switching valve and the second right position switching valve, respectively with second main control valve
Left hydraulic control mouth, right hydraulic control mouth connection；The T mouths of the second left position switching valve and the second right position switching valve, with described time
Hydraulic fluid port connects；
Or, first main control valve or/and second main control valve are 3-position 4-way electrically-controlled valve.
Further, the integrated valve group, in addition to overflow valve；The entrance of the overflow valve, outlet, respectively with the master
Oil inlet, oil return opening connection.
Further, the integrated valve group, in addition to start control valve and the 4th and keep valve；
It is described start the P mouths of control valve, A mouths, T mouths respectively with the exporting of four check valves, the described 4th keeps valve
Control mouth, the oil return opening connection；
Described 4th keeps A mouths, the B mouths of valve, is connected respectively with the main oil inlet, the oil return opening.
Further, the first holding valve, the second holding valve are two-way plug-in valve.
Further, first main control valve, second main control valve, side by side up and down is arranged on the valve plate
On；The sub-control valve, it is arranged on the optional position of the corner of the valve plate；Described first keeps valve, described second to keep valve,
It is arranged on the top of the valve plate；The check valve, it is arranged on the middle part of the valve plate.
Further, the present invention also provides a kind of fluid power system, including fuel tank, oil pump, the first oil cylinder, the second oil cylinder
With above-mentioned arbitrarily integrated valve group；
When the integrated valve group includes first actuator port and second actuator port, first working oil
Mouth, first chamber of second actuator port respectively with first oil cylinder, second oil cylinder connect, first oil cylinder
Second chamber connects with the second chamber of second oil cylinder；
The integrated valve group include first actuator port, second actuator port, the 3rd actuator port and
During four actuator port, first actuator port, second actuator port respectively with first oil cylinder, described
The first chamber connection of two oil cylinders；3rd actuator port, the 4th actuator port respectively with first oil cylinder, described
The second chamber connection of two oil cylinders；Under the first station, the first chamber of the first chamber of first oil cylinder and second oil cylinder connects
Logical, under second station, the first chamber of the first chamber of first oil cylinder and second oil cylinder disconnects.
In addition, present invention also offers a kind of concrete pump, including water tank, hopper and two conveying cylinders, the water tank, material
Bucket is respectively arranged at the both ends of described two conveying cylinders, in addition to fluid power system as described above, the hydraulic-driven system
First oil cylinder of system, the piston rod of the second oil cylinder is through the water tank and the concrete piston with described two conveying cylinders is connected respectively.
Integrated valve group, fluid power system and concrete pump provided by the invention are at work, on the one hand, can pass through first
The Switch of working position of main control valve, executing agency's corresponding actions that the first actuator port of control, the second actuator port are connected；It is another
Aspect, two shuttle valves that can be made up of the Switch of working position of sub-control valve and four check valves, selects main oil inlet, guide's oil-feed
The maximum oil pressure of mouth, the first actuator port and the second actuator port, flow into first and keep valve and second to keep the control mouth of valve, with
Locked first keeps valve and second to keep the A mouths and B mouths of valve, makes its hydraulic oil pressure difference stable, prevents after shutting down because hydraulic oil is let out
Leakage, causes executing agency's maloperation in the presence of external loading.
Brief description of the drawings
The accompanying drawing for forming the part of the present invention is used for providing a further understanding of the present invention, schematic reality of the invention
Apply example and its illustrate to be used to explain the present invention, do not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the structural representation of one embodiment of the integrated valve group of the present invention；
Fig. 2 is the structural representation of another embodiment of the integrated valve group of the present invention；
Fig. 3-8 is the master of one embodiment of the integrated valve group of the present invention, the right side, a left side, faces upward, bows, rearview；
Fig. 9 is the oil circuit flow graph of one embodiment of the integrated valve group of the present invention；
Figure 10 is the structural representation of the fueller of one embodiment of fluid power system of the present invention；
Figure 11 be fluid power system of the present invention one embodiment and executing agency connected relation schematic diagram；
Figure 12 be fluid power system of the present invention another embodiment and executing agency connected relation schematic diagram.
Embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.In addition, the P mouths of valve are oil inlet in this specification；A mouths, B mouths are oil inlet and outlet (i.e. actuator port), the one of valve
Under kind of state may oil-feed, may be fuel-displaced under another state, the valve to being provided simultaneously with A mouths, B mouths, A mouths, B mouths can exchange；T
Mouth is oil return opening.Describe the present invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
As shown in Figure 1, it is shown that a kind of integrated valve group provided by the invention, including valve plate 100 and be arranged on valve plate 100
Main oil inlet P 1, guide's oil inlet P 2, oil return opening (as shown in Figure 1 main oil return inlet T 1, guide's oil return inlet T 2), the first work
Hydraulic fluid port A1, the second actuator port B1, the first main control valve 111, sub-control valve 121, first keep valve 131, second to keep valve 132
And four check valves 140.Specifically, the P mouths of the first main control valve 111, T mouths, connect with main oil inlet P 1, main oil return inlet T 1 respectively
It is logical.A mouths, the B mouths of first main control valve 111, the A mouths of valve 132 are kept to connect with the first holding valve 131, second respectively.First protects
The B mouths that valve 131, second keeps valve 132 are held, are connected respectively with the first actuator port A1, the second actuator port B1.Four check valves
140 entrance, connected respectively with main oil inlet P 1, guide's oil inlet P 2, the first actuator port A1 and the second actuator port B1.Four
After the outlet of individual check valve 140, connected with the P mouths of sub-control valve 121.The A mouths of sub-control valve 121, valve is kept with first
131st, second the control mouth X of valve 132 is kept to connect.The T mouths of sub-control valve 121, are connected with guide's oil return inlet T 2.
In this embodiment, a specific embodiment of integrated valve group is given.In work, on the one hand, the first main control
The Switch of working position of valve 111, executing agency's corresponding actions that controllable first actuator port A1, the second actuator port B1 are connected；
On the other hand, the Switch of working position of sub-control valve 121, two shuttle valves that can be made up of four check valves 140, selects main oil inlet
P1, guide's oil inlet P 2, the first actuator port A1 and the second actuator port B1 maximum oil pressure, flow into first and keep the He of valve 131
Second keeps the control mouth of valve 132, keeps valve 131 and second to keep the A mouths and B mouths of valve 132 with locked first, makes its hydraulic oil
Pressure difference is stable, prevents from causing executing agency's maloperation in the presence of external loading because of hydraulic fluid leak after shutting down.
Preferably, it is with the first actuator port A1, the second actuator port B1, the hydraulic jack of external regulation arm support pitching
Example, the first main control valve 111, you can by Switch of working position, control hydraulic oil flows to B1 mouths by A1 mouths, or flows to A1 by B1 mouths
Mouthful, to control arm support to bow or face upward；And by controlling the oil-feed of A mouths or A mouth oil returns of sub-control valve 121, valve is kept with control first
131st, second keep valve 132 whether locked, avoid hydraulic oil from flowing back, arm support is rested on a certain luffing angle, avoid it in weight
Dropped in the presence of power.
It is more highly preferred to, the first main control valve 111, it is optional but be not limited only to three-position four-way valve.It is more highly preferred to, the first master
Control valve 111, it is optional but be not limited only to 3-position 4-way electrically-controlled valve or 3-position 4-way pilot operated valve device.More specifically, the first main control
Valve 111, during from 3-position 4-way electrically-controlled valve, you can by control its both ends must not electricity, left end obtain electric or right-hand member obtain it is electric, with switching
It is in middle position, left position or the work of right position, and then controls hydraulic oil not circulate or flowed to B1 mouths by A1 mouths or flowed to by B1 mouths
A1 mouths, and then control arm support is failure to actuate, raise up action or nutation action.More specifically, as shown in figure 1, the first main control valve
111, during from 3-position 4-way pilot operated valve device, you can by two reversal valves, such as the first left position switching valve 122, the first right position commutation
Valve 123 switches its station.More specifically, the P mouths of the first left 122 and first right position switching valve 123 of position switching valve, and guide
Oil inlet P 2 connects；The T mouths of first left 122 and first right position switching valve 123 of position switching valve, with main oil return inlet T 1 or guide's oil return
Mouth T2 any one connection；The A mouths of first left 122 and first right position switching valve 123 of position switching valve, respectively with the first main control
The left and right hydraulic control mouth connection of valve 111.By controlling the first left 122 and first right position switching valve 123 of position switching valve, to control the
The hydraulic oil flow direction and station of one main control valve 111, the first actuator port A1, the second actuator port B1 are passed through with further control
The executing agency communicated therewith.It is more highly preferred to, the first left 122 and first right position switching valve 123 of position switching valve, it is optional but not only
Be limited to select two-position three way electrically-controlled valve, by control the two must not electricity or electric or the only first left position switching valve 122 must
Electricity or the first right position switching valve 123 it is electric, to control the hydraulic oil of the first main control valve 111 not flow or be flowed into by left end right
End flows into left end by right-hand member, and then controls the working position of the first main control valve 111 to be cut between middle position or left position or right position
Change, and then control the executing agency communicated therewith by the first actuator port A1, the second actuator port B1.
It is more highly preferred to, sub-control valve 121, it is optional but be not limited only to, it is two-position three way electrically-controlled valve or two-position four-way electromagnetism
Valve, it is oily with the maximum hydraulic pressure that four check valves 140 of control select, if to flow into first and keep by controlling it to obtain power failure state
Whether valve 131 and second keeps the control mouth X of valve 132, to control it locked.
Be more highly preferred to, as shown in Fig. 2 integrated valve group, in addition to the second main control valve 112, the 3rd actuator port A2 and
4th actuator port B2.Wherein, the P mouths of the second main control valve 112, T mouths, A mouths, B mouths, respectively with main oil inlet P 1, main oil return
Mouth T1, the 3rd actuator port A2 and the 4th actuator port B2 connections.
In this embodiment, integrated valve group is additionally arranged the second main control valve 112, can pass through the 3rd actuator port A2, the 4th
Actuator port B2 sets up executing agency, to expand the function of the integrated valve group.It is preferably, similar with the first main control valve 111,
Second main control valve 112, it is optional but be not limited only to three-position four-way valve.It is more highly preferred to, the second main control valve 112, it is optional but not
It is only limitted to 3-position 4-way electrically-controlled valve or 3-position 4-way pilot operated valve device.When from 3-position 4-way electrically-controlled valve, also dead electricity can be obtained by it
State, switch station；From 3-position 4-way pilot operated valve device when, also can by setting up the second left position switching valve 124, the second right position is changed
To valve 125 to switch its station.It is similar, the P mouths of the second left 124 and second right position switching valve 125 of position switching valve, and guide
Oil inlet P 2 connects；The T mouths of second left 124 and second right position switching valve 125 of position switching valve, with main oil return inlet T 1 or guide's oil return
Mouth T2 any one connection；The A mouths of second left 124 and second right position switching valve 125 of position switching valve, respectively with the second main control
The left and right hydraulic control mouth connection of valve 112.Its operation principle and control mode, it is similar with the first main control valve 111, it is no longer superfluous herein
State.
It is more highly preferred to, as shown in Fig. 2 integrated valve group, in addition to the 3rd holding valve 133.Wherein, the 3rd valve 133 is kept
A mouths, B mouths and control mouth, respectively the A mouths with the 3rd actuator port A2, the 4th actuator port B2 and sub-control valve 121 connect.
In this embodiment, the 3rd holding valve 133 is additionally arranged, it keeps valve 131, second to keep valve 132 similar with first
, connect, it can be controlled whether locked, avoid the 3rd actuator port A2, the 4th by sub-control valve 121 with sub-control valve 121
Actuator port B2 hydraulic fluid leak, make its hydraulic oil pressure difference stable, prevent from causing to communicate therewith because of hydraulic fluid leak after shutting down
Executing agency's maloperation in the presence of external loading.
It is more highly preferred to, integrates valve group, in addition to overflow valve 150 and overflow oil return opening T3.Wherein, overflow valve 150 enters
Mouth, outlet, are connected with main oil inlet P 1, overflow oil return opening T3 respectively.
In this embodiment, overflow valve 150 is additionally arranged, when the oil pressure of system exceedes a certain threshold value, you can pass through overflow
The pressure release of valve 150, to improve the stability and security of the integrated valve group.It is noted that main oil return inlet T 1, guide's oil return inlet T 2
With overflow oil return opening T3, it can be same oil return opening, uniformly be communicated to fuel tank.
It is more highly preferred to, integrates valve group, in addition to starts control valve 126 and the 4th and keep valve 134.Wherein, control is started
P mouths, A mouths, the T mouths of valve 126, the P mouths with sub-control valve 121, the 4th keep the control mouth of valve 134, overflow oil return opening T3 respectively
Connection.4th keeps A mouths, the B mouths of valve 134, and the entrance and exit with overflow valve 150 connects respectively.
In this embodiment, it is additionally arranged and starts the holding valve 134 of control valve 126 and the 4th.Preferably, control valve 126 is started,
It is optional but be not limited only to as the two-way electromagnetic valve of magnetic valve, especially three.The hydraulic system that valve group application is integrated when this does not work
Or during in idling mode, control starts control valve 126 must not be electric, the control oil in the 4th holding spring cavity of valve 134 can lead to
The T mouths for crossing startup control valve 126 let out oil return box, and at the same time, the 4th keeps the valve element of valve 134 to open, the main oil inlet of system
P1 pressure oil also can let out oil return box by the 4th holding valve 134, realize system unloaded, keep system oil pressure stable.
It is more highly preferred to, first keeps valve 131, second to keep valve the 132, the 3rd to keep valve the 133, the 4th to keep valve 134, is
Can be locked by oil circuit, to prevent the leakage because of guiding valve, and the control valve for causing executing agency to be acted in the presence of external loading,
Its is optional but is not limited only to as inserted valve, pilot operated directional control valve etc., example be the first inserted valve, the second inserted valve, the 3rd inserted valve
With the 4th inserted valve.It is more highly preferred to, is two-way plug-in valve or two-way pilot operated directional control valve.Check valve 140, overflow valve 150, master control
Valve 111-112 processed, sub-control valve 121, reversal valve 122-125, are screw thread inserting type, and be integrated in spring terminal and cover.Compare
In board-like connection, the structure of the screw thread inserting type is compacter, and volume adds valve block to be reduced by about 33% compared with machine, is easily assembled, just
In later maintenance, and reliability is high.
It is more highly preferred to, as shown in figs. 3-9, it is shown that one of the space layout of the integrated valve group of the present invention preferably implements
Example.Specifically, as shown in figure 3, the first main control valve 111, the second main control valve 112, side by side up and down is arranged on valve plate 100
On；Sub-control valve 121, it is arranged on the optional position of the corner of valve plate 100；First keeps valve 131, second to keep valve 132, sets
In the top of valve plate 100；Check valve 140, it is arranged on the middle part of valve plate 100.As shown in figure 8, main oil inlet P 1 is arranged at first
Between the main control valve 112 of main control valve 111 and second, and it is located at valve group bottom surface, it is optional but be not limited only to directly be connected with sebific duct,
Or the mode according to different main frame pipeline connections, using flange conversion connection.As shown in figure 3, the 3rd keeps valve 133, it is arranged on
The lower section of valve plate 100.First left position switching valve 122, the second left position switching valve 124, it is disposed in parallel in the left side of valve plate 100；The
One right position switching valve 123, the second right position switching valve 124, it is disposed in parallel in the right side of valve plate 100.Overflow valve 150, start control
Valve the 126, the 4th keeps valve 134, is arranged at the top of valve plate 100.As shown in figure 3, the first main control valve 111 and the second master control
Valve 112 processed is in same level, as shown in figure 9, main oil inlet P 1, the first actuator port A1, the second actuator port B1, the 3rd
Actuator port A2, the 4th actuator port B2 are to arrangement, actuator port is distributed in the left and right sides, to avoid right angle to greatest extent
Steering structure so that fluid flow to it is streamlined, effectively avoid its formed local turbulent.Under the layout structure, oil circuit is most
For big through-current capacity up to 1200L/min, the crushing that fluid flows through valve group can be controlled in below 0.3Mpa.4 check valves 140 are integrated in
In valve body, valve group top surface is arranged in, forms the shuttle valve of two pressure oil selections, its oil inlet P connects main overflow valve 150, first
One of oil inlet of main control valve 111, the second main control valve 112 and check valve 140, the first main control valve 111 and second
Main control valve 112 is by the first left position switching valve 122, the first right position switching valve 123, the second left 124 and second right position of position switching valve
Reversal valve 125 controls, the related executing agency of its actuator port connection.
It is more highly preferred to, valve body, profile and the oil circuit of the integrated valve group of the present invention, it is optional but be not limited only to use hot investment casting
Shaping, to shorten the response time to greatest extent, and reduces the crushing that fluid flows through valve group, whole system is more efficiently saved
Energy.
It is more highly preferred to, the first actuator port A1, the second actuator port B1, the 3rd actuator port A2, the 4th actuator port
B2, respectively it is divided into 2 hydraulic fluid ports, to reduce crushing as far as possible.
On the other hand, as shown in figs. 10-12, the present invention also provides a kind of fluid power system, including fuel tank 10, oil pump
20th, the first oil cylinder 30, the second oil cylinder 40 and above-mentioned arbitrarily integrated valve group.Wherein, fuel tank 10 passes through oil pump 20 and main oil inlet
P1, guide's oil inlet P 2 connect, and fuel tank 10 connects with main oil return inlet T 1, guide's oil return inlet T 2, overflow oil return opening T3.
Preferably, by taking the integrated valve group exemplified by application drawing 1 as an example, the integrated valve group only include the first actuator port A1 and
Second actuator port B1, staff can be as shown in figure 11, by the first actuator port A1, the second actuator port B1 respectively with first
The first chamber (being illustrated as thick stick chamber) connection of oil cylinder 30, the second oil cylinder 40, by the second chamber of the first oil cylinder 30 and the second oil cylinder 40
The second chamber (being illustrated as no thick stick chamber) connection.It is worth explanation, it is illustrated that merely illustrative, the first chamber can also be without thick stick chamber, the second chamber
There is cylinder chamber corresponding to being also.
In this embodiment, the pressure oil that oil pump 20 pumps from fuel tank 10, on the one hand entered through main oil inlet P 1 integrated
The P mouths of first main control valve 111 of valve group, it is on the other hand right by the first left reversal valve 122 and first through guide's oil inlet P 2
The alternating control of reversal valve 123, makes the first main control valve 111 any switching laws between middle position or left position or right position, so as to real
The reciprocating motion of existing first oil cylinder 30 and the second oil cylinder 40.Moreover, using the Switch of working position of sub-control valve 121, four can be passed through
Two shuttle valves that check valve 140 forms, select main oil inlet P 1, guide's oil inlet P 2, the work of the first actuator port A1 and second
Hydraulic fluid port B1 maximum oil pressure, the first control mouth for keeping valve 131 and second to keep valve 132 is flowed into, valve 131 is kept with locked first
With the second A mouths and B mouths for keeping valve 132, make its hydraulic oil pressure difference stable, prevent from causing to perform because of hydraulic fluid leak after shutting down
Mechanism maloperation in the presence of external loading.
It is more highly preferred to, by taking the integrated valve group exemplified by application drawing 2 as an example, the integrated valve group includes the first actuator port
A1, the second actuator port B1, the 3rd actuator port A2 and the 4th actuator port B2, operating personnel can be as shown in figure 12, by first
Actuator port A1, the second actuator port B1 connect with the first chamber (being illustrated as no thick stick chamber) of the first oil cylinder 30, the second oil cylinder 40 respectively
It is logical；3rd actuator port A2, second chambers of the 4th actuator port B2 respectively with the first oil cylinder 30, the second oil cylinder 40 (have been illustrated as
Thick stick chamber) connection；And under the first station, the first chamber of the first oil cylinder 30 is set to be connected with the first chamber of the second oil cylinder 40, second
Under station, disconnect the first chamber of the first oil cylinder 30 and the first chamber of the second oil cylinder 40.It is worth explanation, is not shown with Figure 12
Limit, the first chamber also can be to have thick stick chamber；Second chamber can also correspond to no thick stick chamber.
In this embodiment, can by controlling the first main control valve 111, the second main control valve 112 and sub-control valve 121,
Realize the first oil cylinder 30, the corresponding actions of the second oil cylinder 40.With the left position work of the first main control valve 111 (P mouths turn on A mouths into
Oil, B mouths turn on oil return with T mouths), the middle position of the second main control valve 112 work (being not turned on), 121 left position of sub-control valve work (the
One-the three keeps valve 131-133 conducting), the first oil cylinder 30 without thick stick chamber and the second oil cylinder 40 without between thick stick chamber in disconnecting
Exemplified by station, the hydraulic oil that is flowed into through main oil inlet P 1 flows into A mouths, then the through conducting by the P mouths of the first main control valve 111
One keeps valve 131 to reach the first actuator port A1 (the first oil cylinder 30 without thick stick chamber), and promotes the piston cylinder of the first oil cylinder 30 to stretch
Go out, the hydraulic oil for having thick stick intracavitary of the first oil cylinder 30 is flowed into the 3rd actuator port A2, and then the through conducting the 3rd keeps valve 133
The second actuator port B2 (the having thick stick chamber of the second oil cylinder 30) is flowed into, and promotes the piston cylinder of the second oil cylinder 40 to shrink, makes the second oil
The hydraulic oil without thick stick intracavitary of cylinder 40 flows into the 4th actuator port B2, and B mouths and T mouths most afterwards through the first main control valve 111 flow back to
Oil return inlet T 1, complete the action of a hydraulic jack.In addition with the middle position of the first main control valve 111 work (being not turned on), the second master
112 left position of control valve works (P mouths turn on oil-feed with A mouths, and B mouths turn on oil return with T mouths), the middle position of sub-control valve 121 works (the
One-the three holding valve 131-133 is locked), the first oil cylinder 30 without thick stick chamber and the second oil cylinder 40 without between thick stick chamber in connecting
Exemplified by station, the hydraulic oil through the inflow of main oil inlet P 1, A mouths are flowed into by the P mouths of the second main control valve 112 and reach the 3rd working oil
Mouth A2, and promote the piston rod of the first oil cylinder 30 to retract, the hydraulic oil without thick stick intracavitary of the first oil cylinder 30 is arrived through connecting station
Up to the second actuator port B1, and promote the piston rod of the second oil cylinder 40 to stretch out, make the hydraulic oil for having thick stick intracavitary of the second oil cylinder 40
B mouths and T mouths through the 4th actuator port B2 and the second main control valve finally flow back to oil return opening, and hydraulic jack of completion moves
Make.It is worth explanation, the above-mentioned merely illustrative explanation of the course of work, the first main control valve 111, the second main control valve 112, sub-control
Valve 121 is also controllable to the work of right position, the first oil cylinder 30 have thick stick chamber and the second oil cylinder 30 have thick stick chamber may also be in connecting or
Station is disconnected, its course of work can be appreciated by those skilled in the art, will not be repeated here.
In addition, present invention also offers a kind of concrete pump, including water tank, hopper and two conveying cylinders, water tank, hopper point
The both ends of two conveying cylinders are not arranged at, meanwhile, in addition to fluid power system as described above, the first of fluid power system
Oil cylinder 30, the piston rod of the second oil cylinder (40) passes through water tank and the concrete piston with two conveying cylinders is connected respectively.As a result of
Above-mentioned hydraulic system, it is in standby or stopped status in concrete pumping equipment, the concrete in delivery pipe will not reversely be made
For the concrete piston of conveying cylinder, so as to master cylinder be driven to act, the commutation of master cylinder is not interfered with.
Above-mentioned fluid power system is illustrative only by taking the integrated valve group exemplified by Fig. 1,2 as an example.Because it can
Including above-mentioned arbitrarily integrated valve group, so the combining form of embodiment and technique effect are corresponding with above-mentioned integrated valve group,
This is repeated no more.The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all the present invention's
Within spirit and principle, any modification, equivalent substitution and improvements made etc., it should be included in the scope of the protection.
Claims (9)
1. a kind of integrated valve group, including valve plate (100) and be arranged on the valve plate (100) main oil inlet (P1), oil return opening,
First actuator port (A1), the second actuator port (B1), the first main control valve (111), sub-control valve (121), first master
P mouths, the T mouths of control valve (111), connected respectively with the main oil inlet (P1), the oil return opening, it is characterised in that also include
Guide's oil inlet (P2), the first holding valve (131), the second holding valve (132) and four lists being arranged on the valve plate (100)
To valve (140)；
A mouths, the B mouths of first main control valve (111), valve (131), described second is kept to keep valve with described first respectively
(132) A mouths connection；Described first keeps valve (131), described second to keep the B mouths of valve (132) to be worked respectively with described first
Hydraulic fluid port (A1), second actuator port (B1) connection；
The entrance of four check valves (140), respectively with the main oil inlet (P1), guide's oil inlet (P2), described
First actuator port (A1) connects with second actuator port (B1)；After the outlet of four check valves (140), with
The P mouths connection of the sub-control valve (121)；The A mouths of the sub-control valve (121), valve (131), described is kept with described first
Second keeps the control mouth connection of valve (132)；The T mouths of the sub-control valve (121), are connected with the oil return opening.
2. integrated valve group according to claim 1, it is characterised in that also including the second main control valve (112), the 3rd work
Hydraulic fluid port (A2) and the 4th actuator port (B2)；
P mouths, T mouths, A mouths, the B mouths of second main control valve (112), respectively with the main oil inlet (P1), the oil return opening,
3rd actuator port (A2) connects with the 4th actuator port (B2).
3. integrated valve group according to claim 2, it is characterised in that also keep valve (133) including the 3rd；Described 3rd protects
Hold the A mouths, B mouths and control mouth of valve (133), respectively with the 3rd actuator port (A2), the 4th actuator port (B2) and
The A mouths connection of the sub-control valve (121).
4. integrated valve group according to claim 3, it is characterised in that first main control valve (111) is 3-position 4-way
Pilot operated valve device；The integrated valve group also includes：First left position switching valve (122), the first right position switching valve (123)；Described first is left
Position switching valve (122) and the P mouths of the first right position switching valve (123), are connected with guide's oil inlet (P2)；Described
One left position switching valve (122) and the A mouths of the first right position switching valve (123), respectively with first main control valve (111)
Left hydraulic control mouth, the connection of right hydraulic control mouth；The first left position switching valve (122) and the T mouths of the first right position switching valve (123),
Connected with the oil return opening；
Or/and second main control valve (112) is 3-position 4-way pilot operated valve device；The integrated valve group also includes：Second left position is changed
To valve (124), the second right position switching valve (125)；The second left position switching valve (124) and the second right position switching valve
(125) P mouths, connected with guide's oil inlet (P2)；The second left position switching valve (124) and the second right position are changed
To the A mouths of valve (125), the left hydraulic control mouth with second main control valve (112), right hydraulic control mouth connect respectively；Described second is left
Position switching valve (124) and the T mouths of the second right position switching valve (125), are connected with the oil return opening；
Or, first main control valve (111) or/and second main control valve (112) are 3-position 4-way electrically-controlled valve.
5. according to the integrated valve group described in claim 1-4 any one, it is characterised in that also including overflow valve (150)；It is described
The entrance of overflow valve (150), outlet, are connected with the main oil inlet (P1), the oil return opening respectively.
6. integrated valve group according to claim 5, it is characterised in that also include starting control valve (126) and the 4th holding
Valve (134)；
The P mouths, A mouths, T mouths for starting control valve (126) respectively with the exporting of four check valves (140), the described 4th
Keep control mouth, the oil return opening connection of valve (134)；
Described 4th keeps A mouths, the B mouths of valve (134), is connected respectively with the main oil inlet (P1), the oil return opening.
7. according to the integrated valve group described in claim 1-4 any one, it is characterised in that described first keeps valve (131), institute
It is two-way plug-in valve or two-way pilot operated directional control valve to state the second holding valve (132).
8. a kind of fluid power system, it is characterised in that including fuel tank (10), oil pump (20), the first oil cylinder (30), the second oil cylinder
And the integrated valve group described in claim 1-7 any one (40)；
When the integrated valve group includes first actuator port (A1) and second actuator port (B1), first work
Hydraulic fluid port (A1), second actuator port (B1) respectively with first oil cylinder (30), the first chamber of second oil cylinder (40)
Connection, the second chamber of first oil cylinder (30) connect with the second chamber of second oil cylinder (40)；
The integrated valve group includes first actuator port (A1), second actuator port (B1), the 3rd working oil
When mouthful (A2) and the 4th actuator port (B2), first actuator port (A1), second actuator port (B1) are distinguished
Connected with the first chamber of first oil cylinder (30), second oil cylinder (40)；3rd actuator port (A2), the described 4th
Second chamber of the actuator port (B2) respectively with first oil cylinder (30), second oil cylinder (40) connects；Under the first station,
First chamber of first oil cylinder (30) connects with the first chamber of second oil cylinder (40), under second station, described first
First chamber of oil cylinder (30) and the first chamber of second oil cylinder (40) disconnect.
9. a kind of concrete pump, including water tank, hopper and two conveying cylinders, the water tank, hopper are respectively arranged at described two
The both ends of conveying cylinder, it is characterised in that also including fluid power system as claimed in claim 8, the fluid power system
The first oil cylinder (30), the piston rod of the second oil cylinder (40) pass through the water tank, and the concrete with described two conveying cylinders is lived respectively
Plug is connected.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611092371.2A CN106402076B (en) | 2016-12-01 | 2016-12-01 | Integrated valve group, fluid power system and concrete pump |
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| CN201611092371.2A CN106402076B (en) | 2016-12-01 | 2016-12-01 | Integrated valve group, fluid power system and concrete pump |
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| CN106402076B true CN106402076B (en) | 2018-01-02 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108457917B (en) * | 2018-04-20 | 2020-01-31 | 武汉船用机械有限责任公司 | water tightness detection device and hydraulic system thereof |
| CN108730256B (en) * | 2018-08-07 | 2023-12-15 | 徐州徐工基础工程机械有限公司 | Function switching electromagnetic valve group and hydraulic system |
| CN108999821B (en) * | 2018-10-15 | 2024-04-16 | 长沙远大住宅工业阜阳有限公司 | Hydraulic driving system with angle protection and overturning platform |
| CN110541857A (en) * | 2019-09-26 | 2019-12-06 | 江苏恒立液压科技有限公司 | Regenerative control hydraulic system |
| CN112610556A (en) * | 2020-12-07 | 2021-04-06 | 湖南挖挖工程科技有限公司 | Pump truck assembly integrated valve block structure and pump truck assembly |
| CN114345447B (en) * | 2021-12-10 | 2023-06-09 | 南昌矿机集团股份有限公司 | Jaw crusher ore discharge port adjusting hydraulic system and startup adjusting method |
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| CN106402076A (en) | 2017-02-15 |
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