CN209583415U - A kind of hydraulic grab system and grab mechanisms - Google Patents
A kind of hydraulic grab system and grab mechanisms Download PDFInfo
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- CN209583415U CN209583415U CN201822190947.XU CN201822190947U CN209583415U CN 209583415 U CN209583415 U CN 209583415U CN 201822190947 U CN201822190947 U CN 201822190947U CN 209583415 U CN209583415 U CN 209583415U
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- oil circuit
- control valve
- directional control
- branch
- bar oil
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Abstract
The utility model discloses a kind of hydraulic grab system and grab mechanisms, belong to grab bucket technical field comprising hydraulic cylinder has bar oil circuit, the first pilot operated directional control valve, without bar oil circuit, control oil circuit and differential oil line；Hydraulic cylinder includes rod chamber and rodless cavity；Described one end for having bar oil circuit is connected with rod chamber, and the other end is connected with the first pilot operated directional control valve；No bar oil circuit is connected with the rodless cavity；Control oil circuit one end is connected with there is bar oil circuit, and the other end is connected with first control mouth, and the first solenoid directional control valve for controlling the commutation of the first pilot operated directional control valve is provided in the control oil circuit；Differential oil line can be connected to no bar oil circuit and without bar oil circuit.The utility model overcomes existing hydraulic grab and closes that bucket speed is slow, and ineffective feature, when grab bucket needs to be closed, the differential circuit of drive technology shortens opening and closing bucket time of hydraulic grab, so that operating efficiency be made to be promoted.
Description
Technical field
The utility model relates to technical field more particularly to a kind of hydraulic grab system and the grab mechanisms of grabbing bucket.
Background technique
Can hydraulic grab be the important equipment of construction of diaphragm wall, and closing speed is opened in grab bucket, improve work efficiency
Important indicator, since the operating condition of hydraulic grab limits, the hydraulic flow and power for being transported to bucket body are had certain limitations,
Under existing power and flow condition, with hydraulic transmission technology, increases energy storage and control element, make the opening and closing bucket of hydraulic grab
Time shortens 1/3, so that operating efficiency be made to promote 5-10%.
Hydraulic grab is in construction of diaphragm wall, due to equipment volume, energy consumption, efficiency and power transmission pipeline limitation etc.
The power configuration of factors, grab bucket is restricted, and how on the basis of existing, improved the operating efficiency of hydraulic grab, is reached
Improve speed of application and efficiency.
Summary of the invention
For the above-mentioned deficiency of the prior art, the technical problem to be solved by the utility model is to be proposed a kind of hydraulic
Grab bucket system and grab mechanisms, for improving the construction efficiency of grab mechanisms.
The utility model solve its technical problem the technical solution adopted is that:
A kind of hydraulic grab system characterized by comprising
Hydraulic cylinder, including rod chamber and rodless cavity；
There are bar oil circuit, the first pilot operated directional control valve with the first control mouth；Described one end for having bar oil circuit and rod chamber phase
Even, the other end is connected with the first pilot operated directional control valve；
Without bar oil circuit, it is connected with the rodless cavity；
Oil circuit is controlled, one end is connected with there is bar oil circuit, and the other end is connected with first control mouth, the control oil circuit
In be provided with for control the first pilot operated directional control valve commutation the first solenoid directional control valve；
Differential oil line, including the first branch, second branch and third branch, third branch one end and no bar oil circuit phase
Even, the other end is connected with the first pilot operated directional control valve；The first branch is connected with the first pilot operated directional control valve；One end of second branch with
Second branch is connected, and the other end is connected with the first solenoid directional control valve；
Wherein, when the first solenoid directional control valve obtains electric, no bar oil circuit is connected to by the first solenoid directional control valve with the first control mouth,
It is described to there is bar oil circuit to be connected to differential oil line；It is described to there is bar oil circuit to be connected to the first branch when the first solenoid directional control valve power loss,
And second branch is connected to by the first solenoid directional control valve with the first control mouth；Alternatively, when the first solenoid directional control valve power loss, no bar
It is described to have bar oil circuit to be connected to differential oil line when oil circuit is connected to by the first solenoid directional control valve with the first control mouth；First electromagnetism
It is described to there is bar oil circuit to be connected to the first branch when reversal valve obtains electric, and, second branch passes through the first solenoid directional control valve and the first control
Donsole connection.
Preferably, further include energy storage oil circuit, including third branch, the 4th branch, the 5th branch, the second solenoid directional control valve and
Second pilot operated directional control valve, the third branch road are provided with accumulator；One end of the third branch is connected with there is bar oil circuit, separately
One end is connected with the second solenoid directional control valve, and second pilot operated directional control valve is provided with third control mouth, second electromagnetic switch
Valve is connected with third control mouth；Second pilot operated directional control valve one end is connected with third branch, and the other end passes through the 4th branch
It is connected with no bar oil circuit, the 5th branch is connected with bar oil circuit and the second solenoid directional control valve；
When second solenoid directional control valve obtains electric, the second pilot operated directional control valve is connected to the 4th branch and third branch；
When the second solenoid directional control valve power loss, and when thering is bar oil circuit pressure to reach preset pressure, second liquid controlled reversing
Valve is connected to the 4th branch and third branch；And when thering is bar oil circuit pressure to be not up to preset pressure, in second pilot operated directional control valve
Disconnected 4th branch is connected to third branch.
Preferably, hydraulic control one-way valve is set in the no bar oil circuit, the hydraulic control one-way valve is provided with the second control mouth, institute
It states the second control mouth and has bar oil communication.
It preferably, further include pressure sensor, the pressure sensor is used to detect the pressure of the no bar oil circuit.
It preferably, further include controlling the first solenoid directional control valve according to the pressure of no bar oil circuit to obtain electric and power loss control
Device.
Preferably, first solenoid directional control valve and first pilot operated directional control valve are two-position four-way valve.
Preferably, the differential oil line is equipped with the check valve for leading to oil toward no bar oil circuit.
Preferably, the second branch is equipped with the check valve for leading to oil toward the first solenoid directional control valve.
A kind of grab mechanisms characterized by comprising
Hydraulic grab system；
Bucket body；
The bucket head being movably arranged on bucket body；It is opened bucket by the Driven by Hydraulic Cylinder in hydraulic grab system and closes bucket；It is described
The head that struggles against includes two grippers being hinged on bucket body；Each grippers are provided with connecting rod, connecting rod and the hydraulic grab system
Hydraulic cylinder is connected in system.
Preferably, the bucket body includes bracket and is set to counterweight on bracket.
The utility model overcome existing hydraulic grab close bucket speed it is slow, ineffective feature, when grab bucket need close
When conjunction, the opening and closing bucket time of hydraulic grab is shortened, so that operating efficiency be made to be promoted, is provided with by the differential circuit of drive technology
Energy storage oil circuit, when system oil pressure is high, by energy storage oil circuit energy storage, when system oil is forced down, energy storage oil circuit release hydraulic oil is
System is for oil feed pressure.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that grab mechanisms open bucket in embodiment.
Fig. 2 is the structural schematic diagram that grab mechanisms close bucket in embodiment.
Fig. 3 is the oil circuit schematic diagram of hydraulic grab system in embodiment.
Fig. 4 is the oil circuit diagram of the differential mode of hydraulic grab system and high pressure mode switching in embodiment.
Fig. 5 is energy storage oil circuit connection schematic diagram in hydraulic grab system in embodiment.
Specific embodiment
It is specific embodiment of the utility model and in conjunction with attached drawing below, the technical solution of the utility model is made further
Description, but the utility model is not limited to these examples.
Fig. 1-Fig. 5 is please referred to, the utility model discloses a kind of hydraulic grab system and grab mechanisms；Described is hydraulic
Grab bucket system 100 is applied on grab mechanisms.Hydraulic grab system 100 has both of which, i.e. differential mode and high pressure mode；
Differential mode and high pressure mode are changeable；In differential mode, grab mechanisms can quickly grab bucket；Under high pressure mode, grab mechanisms
It is slower than under differential mode in grab bucket speed, but oil pressure is high under the oil pressure ratio differential mode in system, grabs conjunction under high pressure mode
Power is than grabbing resultant force greatly under differential mode.
Grab mechanisms include bucket body 200, hydraulic grab system 100 and bucket head 300；Head 300 struggle against by hydraulic grab system 100
In the driving of hydraulic cylinder 110 open bucket and close bucket；The bucket head 300 includes two grippers 310 being hinged on bucket body 200；Often
A grippers 310 are provided with connecting rod 320, and connecting rod 320 is connected with hydraulic cylinder 110 in the hydraulic grab system 100.
Specifically, scalable in hydraulic cylinder 110, when hydraulic cylinder 110 extends, hydraulic cylinder 110 drives two 300 turns of head of bucket
Dynamic, two bucket heads 300 grab conjunction movement；When hydraulic cylinder 110 shortens, hydraulic cylinder 110 drives two bucket heads 300, so that two
Bucket head 300 does the movement opened.
The bucket body 200 includes bracket 210 and counterweight 220, and the counterweight 220 is fixed on the bracket 210, wherein bucket head
300 mobilizable are set on bracket 210.
Switch the differential mode and high pressure mode in grab mechanisms by hydraulic grab system 100.
Specifically, hydraulic grab system 100 includes hydraulic cylinder 110, has bar oil circuit 120, without bar oil circuit 130, control oil
Road 140, differential oil line 160 and pressure sensor 170.
The first branch 161 is communicated with bar oil circuit 120 and when without bar oil circuit 130, and hydraulic grab system 100 is differential mode.
There is bar oil circuit 120 and disconnected without bar oil circuit 130, hydraulic grab system 100 is high pressure mode.
In this embodiment, hydraulic cylinder 110 includes rod chamber 111 and rodless cavity 112；
There are bar oil circuit 120, the first pilot operated directional control valve 121 with the first control mouth 121a；One end and 111 phase of rod chamber
Even, the other end is connected with the first pilot operated directional control valve 121；
Without bar oil circuit 130, it is connected with the rodless cavity 112；
Oil circuit 140 is controlled, one end is connected with there is bar oil circuit 120, and the other end is connected with the first control mouth 121a, institute
State the first solenoid directional control valve 141 being provided in control oil circuit 140 for controlling the commutation of the first pilot operated directional control valve 121.
Differential oil line 160 comprising the first branch 161 and second branch 162, described 161 one end of the first branch and no bar
Oil circuit is connected, and the other end is connected with the first pilot operated directional control valve 121；Second branch 162 is connected with the first pilot operated directional control valve 121,
Its other end is connected with the first solenoid directional control valve 141.
Wherein, when the first solenoid directional control valve 141 obtains electric, no bar oil circuit 130 passes through the first solenoid directional control valve 141 and the first control
Donsole 121a connection, it is described to there is bar oil circuit 120 to be connected to by the first branch 161 with no bar oil circuit 130；First solenoid directional control valve
It is described to there is bar oil circuit 120 to be connected to second branch 162 when 141 power loss, and, second branch 162 passes through the first solenoid directional control valve
141 are connected to the first control mouth 121a；Alternatively, no bar oil circuit 130 passes through the first electromagnetism when the first 141 power loss of solenoid directional control valve
Reversal valve 141 is connected to the first control mouth 121a, described to have bar oil circuit 120 to connect by the first branch 161 with no bar oil circuit 130
It is logical；It is described to there is bar oil circuit 120 to be connected to second branch 162 when first solenoid directional control valve 141 obtains electric, and, second branch 162 is logical
The first solenoid directional control valve 141 is crossed to be connected to the first control mouth 121a.
That is, passing through control without bar oil circuit 130 and the on-off for having bar oil circuit 120 by the control control of oil circuit 140
The operating mode (differential mode or high pressure mode) of the control hydraulic grab system 100 of oil circuit 140.
Grab mechanisms grab bucket is driven by hydraulic grab system 100, when being not necessarily to very big grab bucket power, in order to improve
The grab bucket speed of grab mechanisms；No bar oil circuit 130 is connected to by the first branch 161 with there is bar oil circuit 120, (hydraulic when closing bucket
Cylinder 110 extends), no bar oil circuit 130 oiling into rodless cavity 112 in hydraulic cylinder 110, the hydraulic oil in rod chamber 111 passes through nothing
Bar oil circuit 130 injects in rodless cavity 112, wherein the area of 110 rodless cavity 112 of hydraulic cylinder and 111 area of rod chamber close to 2:1,
Enter rodless cavity 112 in the pressure oil of 110 rod chamber 111 of hydraulic cylinder, improves the movement velocity of oil cylinder.
When needing very big grab bucket power, hydraulic grab system 100 needs bigger oil pressure, makes no bar oil circuit 130 and has
Bar oil circuit 120 disconnects, the no storage of bar oil circuit 130 pressure, and pressure is got higher in rodless cavity 112, so that grab mechanisms grab conjunction with bigger
Power.
Hydraulic control one-way valve 131 is set in the no bar oil circuit 130, and the hydraulic control one-way valve 131 is provided with the second control mouth
131a, the second control mouth 131a are connected to there is bar oil circuit 120.
It further include pressure sensor 170, the pressure sensor 170 is used to detect the pressure of the no bar oil circuit 130.
It further include controlling the first solenoid directional control valve 141 according to the pressure of no bar oil circuit 130 to obtain electric and power loss controller.
Specifically, can be automatically controled 100 switch mode of hydraulic grab system by controller (makes differential mode automatically
Mutually switch with high pressure mode), the switching numerical value of oil pressure in no bar oil circuit 130 is preset, and real-time by pressure sensor 170
The pressure value without bar oil circuit 130 is detected, by comparing the size for switching numerical value and the pressure value without bar oil circuit 130, and then is controlled
First solenoid directional control valve 141 electric or power loss, and then control without whether bar oil circuit 130 is connected to there is bar oil circuit 120.
In this embodiment, when the pressure value of no bar oil circuit 130 is less than switching numerical value, the first solenoid directional control valve 141
Must be electric, no bar oil circuit 130 is connected to by the first solenoid directional control valve 141 with the first control mouth 121a, described to have bar oil circuit 120 to pass through
First pilot operated directional control valve 121, the first branch 161 are connected to no bar oil circuit 130；So as to improve hydraulic cylinder 110 stretch speed, into
And it improves grab mechanisms and opens bucket and close the speed of bucket.
When the pressure value of no bar oil circuit 130 is greater than switching numerical value, 141 power loss of the first solenoid directional control valve, the first electromagnetism is changed
The connection of the first control mouth and no bar oil circuit is interrupted to valve, it is described to there is bar oil circuit 120 to change by second branch 162, the first electromagnetism
It is connected to valve and the first control mouth, and, there is bar oil circuit not trigger the commutation of the first pilot operated directional control valve；There are bar oil circuit 120 and nothing
Bar oil circuit 130 disconnects, and so as to improve the oil pressure having in bar oil circuit 120, and then improves in grab mechanisms and grabs resultant force.
Hydraulic grab system further includes energy storage oil circuit 150, including third branch 151, the 4th branch 152, the 5th branch
153, the second solenoid directional control valve 154 and the second pilot operated directional control valve 155 are provided with accumulator 156 on the third branch 151；Institute
The one end for stating third branch 151 is connected with there is bar oil circuit, and the other end is connected with the second solenoid directional control valve 154, second hydraulic control
Reversal valve 155 is provided with third control mouth 155a, and second solenoid directional control valve 154 is connected with third control mouth 155a；It is described
Second pilot operated directional control valve, 155 one end is connected with third branch 151, and the other end is connected by the 4th branch 152 with no bar oil circuit,
5th branch 153 is connected with bar oil circuit and the second solenoid directional control valve 154；
When second solenoid directional control valve 154 obtains electric, the second pilot operated directional control valve 155 is connected to the 4th branch 152 and third branch
151；
When the second 154 power loss of solenoid directional control valve, and when having bar oil circuit pressure to reach preset pressure, second hydraulic control is changed
The 4th branch 152 and third branch 151 are connected to valve 155；And when thering is bar oil circuit pressure to be not up to preset pressure, second liquid
Control reversal valve 155 the 4th branch 152 of interruption is connected to third branch 151.
Specifically, when pressure is less than normal in no bar oil circuit, control the second solenoid directional control valve 154 commutation, third branch 151
Middle hydraulic oil enters third control mouth 155a by the second solenoid directional control valve 154, so that the second pilot operated directional control valve 155 commutates, into
And third branch 151 is connected to the 4th branch 152, that is, the releasable hydraulic oil of accumulator 156 is to nothing in third branch 151
In bar oil circuit, to improve the oil pressure without bar oil circuit, in normal operation, third control mouth 155a passes through no bar oil circuit pressure
Second solenoid directional control valve 154 with have bar oil communication, have the insufficient pressure of bar oil circuit so that the second pilot operated directional control valve 155 commutates,
Second pilot operated directional control valve 155 interrupts being connected to for third branch 151 and the 4th branch 152, when there is bar oil circuit pressure to reach
When 32Mpa, there is hydraulic oil in bar oil circuit to pass through the second solenoid directional control valve 154 into third control mouth 155a, may make the second liquid
It controls reversal valve 155 to commutate, so that there is the oiling into accumulator 156 of bar oil circuit to pressurize.
Wherein, first solenoid directional control valve 141 and first pilot operated directional control valve 121 are two-position four-way valve.
The third branch 163 is equipped with the check valve for leading to oil toward no bar oil circuit 130.
The second branch 162 is equipped with the check valve for leading to oil toward the first solenoid directional control valve 141.
The present embodiment patent overcome existing hydraulic grab close bucket speed it is slow, ineffective feature, when grab bucket need
When closure, the opening and closing bucket time of hydraulic grab is shortened 1/3 by the differential circuit of drive technology, so that operating efficiency be made to promote 5-
10%.According to daily work 20 hours, 10 minutes were a pipeful of, average every 2 cubes of bucket, improved operating efficiency 8%, and 19.2 cubes
Rice/day.
For traditional grab mechanisms in zero load, it is 744L/min that bucket flow is closed in grab bucket, closes 13 ms/min of speed of bucket, this reality
Grab mechanisms in example are applied, close bucket speed up to 18 ms/min or more.
For traditional grab mechanisms in grade of load 280bar, it is 426L/min that bucket flow is closed in grab bucket, 7.5 ms/min, this reality
Grab mechanisms in example are applied, closing bucket speed can reach 10.3 ms/min.
The specific embodiments described herein are merely examples of the spirit of the present invention.The utility model institute
Belonging to those skilled in the art can make various modifications or additions to the described embodiments or using similar
Mode substitute, but without departing from the spirit of the present application or beyond the scope of the appended claims.
Claims (10)
1. a kind of hydraulic grab system characterized by comprising
Hydraulic cylinder, including rod chamber and rodless cavity；
There are bar oil circuit, the first pilot operated directional control valve with the first control mouth；Described one end for having bar oil circuit is connected with rod chamber,
The other end is connected with the first pilot operated directional control valve；
Without bar oil circuit, it is connected with the rodless cavity；
Oil circuit is controlled, one end is connected with there is bar oil circuit, and the other end is connected with first control mouth, sets in the control oil circuit
It is equipped with the first solenoid directional control valve for controlling the commutation of the first pilot operated directional control valve；
Differential oil line, including the first branch and second branch, described first branch one end are connected with no bar oil circuit, the other end with
First pilot operated directional control valve is connected；Second branch is connected with the first pilot operated directional control valve, and the other end is connected with the first solenoid directional control valve；
Wherein, when the first solenoid directional control valve obtains electric, no bar oil circuit is connected to by the first solenoid directional control valve with the first control mouth, described
There is bar oil circuit to pass through the first branch and no bar oil communication；It is described to have bar oil circuit and second when the first solenoid directional control valve power loss
Road connection, and, second branch is connected to by the first solenoid directional control valve with the first control mouth；
Alternatively, no bar oil circuit is connected to by the first solenoid directional control valve with the first control mouth, described when the first solenoid directional control valve power loss
There is bar oil circuit to pass through the first branch and no bar oil communication；It is described to have bar oil circuit and second when first solenoid directional control valve obtains electric
Road connection, and, second branch is connected to by the first solenoid directional control valve with the first control mouth.
2. a kind of hydraulic grab system as described in claim 1, it is characterised in that: further include energy storage oil circuit, including third branch
Road, the 4th branch, the 5th branch, the second solenoid directional control valve and the second pilot operated directional control valve, the third branch road are provided with energy storage
Device；One end of the third branch is connected with there is bar oil circuit, and the other end is connected with the second solenoid directional control valve, and second hydraulic control is changed
Valve is provided with third control mouth, second solenoid directional control valve is connected with third control mouth；Second pilot operated directional control valve one
End is connected with third branch, and the other end is connected by the 4th branch with no bar oil circuit, and the 5th branch is connected with bar oil circuit
With the second solenoid directional control valve；
When second solenoid directional control valve obtains electric, the second pilot operated directional control valve is connected to the 4th branch and third branch；
When the second solenoid directional control valve power loss, and when having bar oil circuit pressure to reach preset pressure, second pilot operated directional control valve connects
Logical 4th branch and third branch；And when thering is bar oil circuit pressure to be not up to preset pressure, second pilot operated directional control valve interrupts the
Four branches are connected to third branch.
3. a kind of hydraulic grab system as described in claim 1, it is characterised in that: fluid-control one-way is arranged in the no bar oil circuit
Valve, the hydraulic control one-way valve are provided with the second control mouth, second control mouth and have bar oil communication.
4. a kind of hydraulic grab system as described in claim 1, it is characterised in that: it further include pressure sensor, the pressure
Sensor is used to detect the pressure of the no bar oil circuit.
5. a kind of hydraulic grab system as described in claim 1, it is characterised in that: further include according to the pressure of no bar oil circuit come
It controls the first solenoid directional control valve and obtains electric and power loss controller.
6. a kind of hydraulic grab system as described in claim 1, it is characterised in that: first solenoid directional control valve and described the
One pilot operated directional control valve is two-position four-way valve.
7. a kind of hydraulic grab system as described in claim 1, it is characterised in that: the differential oil line is equipped with toward no bar oil circuit
Lead to the check valve of oil.
8. a kind of hydraulic grab system as described in claim 1, it is characterised in that: the second branch is equipped with toward the first electromagnetism
Reversal valve leads to the check valve of oil.
9. a kind of grab mechanisms characterized by comprising
Such as the described in any item hydraulic grab systems of claim 1-8；
Bucket body；
The bucket head being movably arranged on bucket body；It is opened bucket by the Driven by Hydraulic Cylinder in hydraulic grab system and closes bucket；The bucket head
The grippers being hinged on bucket body including two；Each grippers are provided with connecting rod, in connecting rod and the hydraulic grab system
Hydraulic cylinder is connected.
10. a kind of grab mechanisms as claimed in claim 9, it is characterised in that: the bucket body includes bracket and is set to bracket
Upper counterweight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822190947.XU CN209583415U (en) | 2018-12-25 | 2018-12-25 | A kind of hydraulic grab system and grab mechanisms |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822190947.XU CN209583415U (en) | 2018-12-25 | 2018-12-25 | A kind of hydraulic grab system and grab mechanisms |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209583415U true CN209583415U (en) | 2019-11-05 |
Family
ID=68378844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822190947.XU Active CN209583415U (en) | 2018-12-25 | 2018-12-25 | A kind of hydraulic grab system and grab mechanisms |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209583415U (en) |
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2018
- 2018-12-25 CN CN201822190947.XU patent/CN209583415U/en active Active
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