CN203702701U - Hydraulic control system and concrete pumping equipment - Google Patents
Hydraulic control system and concrete pumping equipment Download PDFInfo
- Publication number
- CN203702701U CN203702701U CN201420074061.8U CN201420074061U CN203702701U CN 203702701 U CN203702701 U CN 203702701U CN 201420074061 U CN201420074061 U CN 201420074061U CN 203702701 U CN203702701 U CN 203702701U
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- valve
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- 238000005086 pumping Methods 0.000 title claims abstract description 13
- 239000012530 fluid Substances 0.000 claims description 40
- 239000002828 fuel tank Substances 0.000 claims description 16
- 239000000446 fuel Substances 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 239000003921 oil Substances 0.000 description 90
- 238000010586 diagram Methods 0.000 description 7
- 239000010720 hydraulic oil Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
Abstract
The utility model discloses a hydraulic control system and concrete pumping equipment. The hydraulic control system comprises a volume adjustable hydraulic pump, a hydraulic rotary motor, a switch control valve, a reversing valve, a pressure sensor and a controller, wherein the hydraulic rotary motor has two chambers; the switch control valve is arranged on an external oil line of the two chambers; the reversing valve is used to control the hydraulic rotary motor to stop and reverse; the pressure sensor is used to detect the pressure difference between the first chamber and the second chamber; the controller is connected with the pressure sensor and the switch valve, and is used to control to open the switch valve when the volume adjustable hydraulic pump stops supplying oil for the hydraulic rotary motor and the pressure value detected by the pressure sensor exceeds a set pressure difference value. According to a technical solution mentioned above, when the hydraulic rotary motor is stopped, a hydraulic pressure difference of the two chambers in the hydraulic rotary motor is adjusted by the switch valve and the controller that are arranged in the hydraulic control system, so that the rotation situation of the hydraulic rotary motor when the motor stops rotating is improved, and the stability is enhanced.
Description
Technical field
The utility model relates to the technical field of hydraulic system, refers more particularly to a kind of hydraulic control system and concrete pumping equipment.
Background technique
Jib concrete pump truck can change cloth point easily by luffing or the revolution of jib, and wherein the revolution of jib is driven by hydraulic rotary motor or angling cylinder conventionally, and hydraulic rotary motor driving mode is the most common.Conventionally because concrete pump truck arm weight is large and the arm of force is very long, its rotary inertia is very large.This brings larger difficulty to accurate control of jib revolution.And in concrete pump truck arm revolution course of action, the stability of its rotary braking directly affects location and the handling safety of cloth point.
As shown in Figure 1, Figure 2 and Figure 3, Fig. 1, Fig. 2 and Fig. 3 show respectively the hydraulic schematic diagram of jib revolution hydraulic control system in the time of different operating state in prior art, wherein, motor 1 drives volume adjustable hydraulic pump 2, the pressure oil of output through selector valve 3(conventionally with manual operation function) right position or left position after enter into and turn round equilibrium valve group 4, and finally enter in hydraulic rotary motor 4, and drive clockwise (as Fig. 2) of hydraulic rotary motor 4 or (as Fig. 3) revolution counterclockwise, and then realize the clockwise or counterclockwise revolution action of pumping vehicle arm rack.In the time that concrete arm revolution stops, selector valve 3 is operated in meta, as shown in Figure 1.
Now suppose that concrete pump truck arm turns round clockwise, as shown in Figure 2, now selector valve 3 is operated in right position, the logical high pressure oil in A chamber of hydraulic rotary motor 4, and the hydraulic oil in B chamber takes back fuel tank.In the time that jib revolution stops, selector valve 3 moves to meta by right position, the direct oil sump tank off-load of pressure oil of volume adjustable hydraulic pump 2, and between the A chamber of hydraulic rotary motor 4 and volume adjustable hydraulic pump 2, the fluid in oil circuit disconnection and B chamber can not flow out and can only flow into.But because the rotary inertia of pumping vehicle arm rack is very large, in the time that selector valve 3 has reached meta, jib is still in revolution, but A chamber enters without fluid and B cavity pressure oil cannot be discharged, cause A cavity pressure to reduce and the increase of B cavity pressure, this kind of variation tendency continues for some time rear jib and turns round and stop clockwise.Now the B chamber of hydraulic rotary motor 4 because fluid can not flow out the compressed elevated pressures of having put aside, this pressure can make hydraulic rotary motor 4 rotate counterclockwise round about after jib stops along cursor backward, thereby hydraulic rotary motor 4 drives jib to rotate counterclockwise.Now rotating counterclockwise of jib equally can be through " turning anticlockwise-stopping-revolution clockwise " process.And so forth until the rotary kinetic energy of concrete arm is exhausted with the form of heat.Cause jib in the time stopping, occurring shake, less stable.
Model utility content
The utility model provides a kind of hydraulic control system and concrete pumping equipment, in order to solve the revolution jib that there is concrete pumping equipment in the prior art jitter problem when the revolution.
The utility model provides a kind of hydraulic control system, and this hydraulic control system comprises:
Volume adjustable hydraulic pump;
There is the hydraulic rotary motor of the first chamber and the second chamber, and described the first chamber is connected by external oil circuit with the second chamber;
Be arranged on the switching control pilot on described external oil circuit;
Be arranged on the oil circuit that described volume adjustable hydraulic pump is connected with hydraulic rotary motor and control the selector valve that described hydraulic rotary motor stops and commutating; Wherein, the oil circuit that connects the hydraulic fluid port of described the first chamber and described selector valve is the first oil circuit, and the oil circuit that connects another hydraulic fluid port of described the second chamber and described selector valve is the second oil circuit;
Revolution equilibrium valve group, comprise the on-off control valve group being separately positioned on the first oil circuit and the second oil circuit, described on-off control valve group comprises one-way valve in parallel and switching control pilot, wherein, the conducting direction of one-way valve is hydraulic rotary motor oil-feed direction, switching control pilot conducting direction is the fuel-displaced direction of hydraulic rotary motor, and the conducting hydraulic fluid port that is arranged on the switching control pilot on the first oil circuit is communicated with described the second oil circuit, the conducting hydraulic fluid port that is arranged on the switching control pilot on the second oil circuit is communicated with described the first oil circuit;
Be arranged on described the first oil circuit and described the second oil circuit and for detection of the pressure transducer of the pressure difference of described the first chamber and described the second chamber;
The controller being connected with described pressure transducer and described switch valve, stops to described hydraulic rotary motor fuel feeding at described hydraulic variable displacement pump, and the pressure difference value that described compressive force sensor detects is while exceeding the pressure difference value of setting, controls described switch valve and opens.
In technique scheme, the hydraulic difference of two chambers while stopping by being arranged on switch valve in hydraulic control system and controller adjustment in hydraulic rotary motor, thereby improve the revolution situation of hydraulic rotary motor in the time stopping operating, improved stability when hydraulic rotary motor stops.
Preferably, described switch valve is two-position two-way solenoid valve, and described the first hydraulic fluid port is communicated with described the first chamber, and described the second hydraulic fluid port is communicated with described the second chamber; In the time that described two-position two-way solenoid valve is positioned at left position, described the first chamber and the second chamber are communicated with.By the break-make of two-position two-way solenoid valve control the first chamber and the second chamber, there is higher control ability.
Preferably, described selector valve is three six three-way electromagnetic valves, and the first hydraulic fluid port of described three six three-way electromagnetic valves is communicated with fuel tank, the second hydraulic fluid port is communicated with described the first chamber, the 3rd hydraulic fluid port is communicated with described the second chamber, the 4th hydraulic fluid port and the 5th hydraulic fluid port are communicated with described volume adjustable hydraulic pump, and the 6th hydraulic fluid port is communicated with fuel tank; Wherein, in the time that described three six three-way electromagnetic valves are positioned at left position, described volume adjustable hydraulic pump is communicated with described the first chamber; In the time that described three six three-way electromagnetic valves are positioned at meta, described volume adjustable hydraulic pump is communicated with described fuel tank; In the time that described three six three-way electromagnetic valves are positioned at right position, described volume adjustable hydraulic pump is communicated with described the second chamber.Stop and commutating by three six three-way electromagnetic valve control hydraulic rotary motors, thering is higher control ability.
Preferably, described revolution equilibrium valve group also comprises shuttle valve, and the first control port of described shuttle valve is communicated with described the first oil circuit, and the second control port of described shuttle valve is communicated with the second oil circuit; Described hydraulic rotary motor also comprises break, and the control port of described break is communicated with the oil outlet of described shuttle valve.Further improve the revolution situation of hydraulic rotary motor in the time stopping by break, and then improved the stable shape of hydraulic rotary motor in the time stopping.
Preferably, described revolution equilibrium valve group also comprises two relief valves that are arranged between described the first oil circuit and the second oil circuit, and the conducting direction of described two relief valves is contrary.Improve the pressure that hydraulic pressure components and parts bear, the working life of having improved hydraulic pressure components and parts.
The utility model also provides a kind of concrete pumping equipment, and this concrete pumping equipment comprises above-mentioned any hydraulic control system.
In technique scheme, the hydraulic difference of two chambers while stopping by being arranged on switch valve in hydraulic control system and controller adjustment in hydraulic rotary motor, thereby improve the revolution situation of hydraulic rotary motor in the time stopping operating, improve stability when hydraulic rotary motor stops, and then improved the stability of revolution jib.
Accompanying drawing explanation
Fig. 1 is the structural drawing of hydraulic control system in prior art;
Fig. 2 is the fundamental diagram that the hydraulic rotary motor in hydraulic control system of the prior art clockwise rotates;
Fig. 3 is the fundamental diagram that the hydraulic rotary motor in hydraulic control system of the prior art rotates counterclockwise;
The structural drawing of the hydraulic control system that Fig. 4 provides for the utility model embodiment;
The fundamental diagram that hydraulic rotary motor in the hydraulic control system that Fig. 5 provides for the utility model embodiment clockwise rotates;
The fundamental diagram that hydraulic rotary motor in the hydraulic control system that Fig. 6 provides for the utility model embodiment rotates counterclockwise.
Embodiment
Below in conjunction with accompanying drawing, specific embodiment of the utility model is elaborated.Should be understood that, embodiment described herein only, for description and interpretation the utility model, is not limited to the utility model.
Fig. 4 shows the structure of the hydraulic control system that the utility model embodiment provides, as shown in Figure 4,
Volume adjustable hydraulic pump 2;
There is the hydraulic rotary motor 6 of the first chamber and the second chamber, and the first chamber is connected by external oil circuit with the second chamber;
Be arranged on the switching control pilot on external oil circuit;
Be arranged on the oil circuit that volume adjustable hydraulic pump 2 is connected with hydraulic rotary motor 6 and control the selector valve 3 that hydraulic rotary motor 6 commutates; Wherein, the oil circuit that connects the hydraulic fluid port of the first chamber and selector valve 3 is the first oil circuit 1, and the oil circuit that connects another hydraulic fluid port of the second chamber and selector valve 3 is the second oil circuit 9;
Revolution equilibrium valve group 4, comprise the on-off control valve group being separately positioned on the first oil circuit 1 and the second oil circuit 9, on-off control valve group comprises one-way valve in parallel and switching control pilot, wherein, the conducting direction of one-way valve is hydraulic rotary motor 6 oil-feed directions, switching control pilot conducting direction is the fuel-displaced direction of hydraulic rotary motor 6, and the conducting hydraulic fluid port that is arranged on the switching control pilot on the first oil circuit 1 is communicated with the second oil circuit 9, the conducting hydraulic fluid port that is arranged on the switching control pilot on the second oil circuit 9 is communicated with the first oil circuit 1;
Be arranged on the first oil circuit 1 and the second oil circuit 9 and for detection of the pressure transducer 5 of the pressure difference of the first chamber and the second chamber;
The controller being connected with pressure transducer 5 and switch valve 7, stops to described hydraulic rotary motor fuel feeding at described hydraulic variable displacement pump, and the pressure difference value that compressive force sensor detects is while exceeding the pressure difference value of setting, and control switch valve 7 is opened.
In the above-described embodiments, forward to after desired location at hydraulic rotary motor 6, volume adjustable hydraulic pump 2 stops providing power to hydraulic rotary motor 6, but, the output shaft of hydraulic rotary motor 6 is under effect of inertia, still can be rotated further, cause the oil pressure in two chambers of hydraulic rotary motor 6 to change, now, be communicated with the first oil circuit 1 and the second oil circuit 9 and detect in real time the hydraulic difference of the first chambers and the second chamber and sent to controller for detection of the pressure transducer 5 of the hydraulic difference of the first chamber and the second chamber, when the first chamber receiving when controller and the hydraulic difference of the second chamber exceed the hydraulic pressure difference of setting, controller control switch control valve is opened, the first chamber and the second chamber are communicated with, thereby the oil pressure of balance the first chamber and the second chamber, the resultful shake that has improved the hydraulic rotary motor 6 that inertial force causes, improve the stationarity of hydraulic rotary motor 6 output shafts in the time stopping operating.
Switch valve 7 is wherein two-position two-way solenoid valve, and the first hydraulic fluid port is communicated with the first chamber, and the second hydraulic fluid port is communicated with the second chamber; In the time that described two-position two-way solenoid valve is positioned at left position, described the first chamber and the second chamber are communicated with.In the time that the hydraulic difference between the first chamber and the second chamber that pressure transducer 5 detects exceedes the hydraulic difference of setting in controller, described in controller control, two-position two-way solenoid valve is positioned at left position, now, the first chamber and the second chamber conducting, hydraulic difference in two chambers starts to decline until balance, the spool of controller control two-position two-way solenoid valve moves to right position, and the first chamber and the second chamber disconnect.Thereby improve the jitter conditions of hydraulic rotary motor 6, improved the stability of hydraulic rotary motor 6.The hydraulic difference of setting in its middle controller is to record according to actual working condition experiment, is specially at output shaft in the time that inertia rotates, and it is poor that its rotating speed is approximately the oil pressure of first chamber of 1 o'clock and the second chamber.
Selector valve 3 is wherein three six three-way electromagnetic valves, and the first hydraulic fluid port of three six three-way electromagnetic valves is communicated with fuel tank, the second hydraulic fluid port is communicated with the first chamber, and the 3rd hydraulic fluid port is communicated with the second chamber, the 4th hydraulic fluid port and the 5th hydraulic fluid port are communicated with volume adjustable hydraulic pump 2, and the 6th hydraulic fluid port is communicated with fuel tank; Wherein, in the time that three six three-way electromagnetic valves are positioned at left position, volume adjustable hydraulic pump 2 is communicated with the first chamber; In the time that three six three-way electromagnetic valves are positioned at meta, volume adjustable hydraulic pump 2 is communicated with fuel tank; In the time that three six three-way electromagnetic valves are positioned at right position, volume adjustable hydraulic pump 2 is communicated with the second chamber.
The hydraulic control system that the hydraulic control system providing below in conjunction with the present embodiment shown in Fig. 4, Fig. 5 and Fig. 6 provides this enforcement in the schematic diagram of different operating state is elaborated.
Wherein, the one-way valve and the switching control pilot that are arranged on the first oil circuit 1 are the first one-way valve 11 and the first switching control pilot 12, the one-way valve and the switching control pilot that are arranged on the second oil circuit 9 are the second one-way valve 14 and second switch control valve 13, the first chamber of hydraulic rotary motor 6 is A chamber, the second chamber is B chamber, in the time that hydraulic control system is worked, as shown in Figure 5, schematic diagram when Fig. 5 shows hydraulic rotary motor 6 and clockwise rotates, now, three six three-way electromagnetic valves are positioned at left position, volume adjustable hydraulic pump 2 is communicated with the A chamber of hydraulic rotary motor 6, fuel tank is communicated with B chamber, now, the first oil circuit 1 is in-line, the second oil circuit 9 is oil circuit, volume adjustable hydraulic pump 2 starts fuel feeding under the driving of motor 1, the high pressure oil that volume adjustable hydraulic pump 2 is confessed enters into the first oil circuit 1, and by entering into A chamber after the first one-way valve 11 on the first oil circuit 1, simultaneously, hydraulic oil in the first oil circuit 1 enters in the conducting hydraulic fluid port that is arranged on the second switch control valve 13 on the second oil circuit 9, back down the spring of second switch control valve 13, second switch control valve 13 is opened, make the second oil circuit 9 conductings, now, the oil pressure of the hydraulic oil in A chamber is greater than the oil pressure in B chamber, the hydraulic oil promotion hydraulic rotary motor 6 entering in A chamber rotates, hydraulic oil in B chamber is discharged from, the hydraulic oil of discharging is got back to fuel tank after second switch control valve 13.In the time that hydraulic rotary motor 6 turns to the position of setting, three six three-way electromagnetic valves commutate to meta, now, volume adjustable hydraulic pump 2 is communicated with fuel tank, the first oil circuit 1 and the second oil circuit 9 are all communicated with fuel tank, because the oil pressure of the first oil circuit 1 declines, second switch control valve 13 is closed under the effect of spring, now, the first switching control pilot 12 and second switch control valve 13 are all closed, move to after meta at three six three-way electromagnetic valves, in A chamber, stop oil-feed, the output shaft of hydraulic rotary motor 6 continues to clockwise rotate under the effect of inertia, cause A chamber to increase, B chamber reduces, because A chamber and B chamber all cannot be fuel-displaced, thereby make the oil pressure in A chamber start to decline, oil pressure in B chamber starts to rise, be arranged on the hydraulic difference that pressure transducer 5 between the first oil circuit 1 and the second oil circuit 9 starts to detect A chamber and B chamber, when detect hydraulic difference higher than set hydraulic difference time, controller control two-position two-way solenoid valve is opened, oil in B chamber enters in A chamber, A chamber starts to reduce until the oil pressure of two chambers is identical with the hydraulic difference of B chamber, can be found out by foregoing description, stop the inertia of the output shaft of hydraulic rotary motor 6 to rotate by the hydraulic difference of A chamber and B chamber, in the time that the hydraulic difference of A chamber and B chamber is excessive, adjust both hydraulic difference before by the break-make of two-position two-way solenoid valve, thereby improve the excessive and oil pressure actuated output shaft rotating situation of the B chamber that causes of hydraulic difference, and then improve hydraulic rotary motor 6 jitter conditions in the time rotating, improve the stability of hydraulic rotary motor 6 in the time stopping.When hydraulic rotary motor 6 shown in Fig. 6 rotates counterclockwise, working principle when its working principle clockwise rotates with hydraulic rotary motor 6 is close, and this is no longer going to repeat them.
Select scheme as one, revolution equilibrium valve group 4 also comprises shuttle valve 15, and the first control port of shuttle valve 15 is communicated with the first oil circuit 1, and the second control port of shuttle valve 15 is communicated with the second oil circuit 9; Hydraulic rotary motor 6 also comprises break 10, and the control port of break 10 is communicated with the oil outlet of shuttle valve 15.Take shown in Fig. 5 clockwise as example, the high pressure oil of the first oil circuit 1 enters in break 10 after by shuttle valve 15, spring in compression brake 10, break 10 is separated, thereby hydraulic rotary motor 6 can be rotated, in the time that three six three-way electromagnetic valves move to meta, the first oil circuit 1 and the second oil circuit 9 are all communicated with fuel tank, break 10 returns to its original state under the effect of its spring, the output shaft rotation that stops hydraulic rotary motor 6, has further strengthened the stability of hydraulic rotary motor 6 in the time stopping.In the time that the second oil circuit 9 is in-line, its working principle is close during with in-line with the first oil circuit 1, and this is no longer going to repeat them.
In order to improve the Security of the hydraulic pressure components and parts in hydraulic control system, the revolution equilibrium valve group 4 in above-described embodiment also comprises two relief valves that are arranged between the first oil circuit 1 and the second oil circuit 9, and the conducting direction of two relief valves is contrary.In the time that the first oil circuit 1 or the second oil circuit 9 are filler opening, in the time that the oil pressure of fuel feeding is excessive, can be undertaken unloading by the relief valve being arranged on corresponding oil circuit, with the example that is illustrated as shown in Fig. 5, in the time that the oil pressure on the first oil circuit 1 is too high, can be fed directly on the second oil circuit 9 by the relief valve on the first oil circuit 1, and turns back to fuel tank, thereby improve the oil pressure bearing of hydraulic pressure components and parts, improved the working life of hydraulic pressure components and parts.
The utility model also provides a kind of concrete pumping equipment, and this concrete pumping equipment comprises above-mentioned any hydraulic control system.Hydraulic rotary motor in this hydraulic control system drives revolution jib to rotate, in the time stopping, the hydraulic difference of two chambers while stopping by being arranged on switch valve 7 in hydraulic control system and controller adjustment in hydraulic rotary motor 6, thereby improve revolution situation when hydraulic rotary motor 6 stops, improve stability when hydraulic rotary motor 6 stops, and then improved the stability of revolution jib.
Obviously, those skilled in the art can carry out various changes and modification and not depart from spirit and scope of the present utility model the utility model.Like this, if within of the present utility model these are revised and modification belongs to the scope of the utility model claim and equivalent technologies thereof, the utility model is also intended to comprise these changes and modification interior.
Claims (6)
1. a hydraulic control system, is characterized in that, comprising:
Volume adjustable hydraulic pump;
There is the hydraulic rotary motor of the first chamber and the second chamber, and described the first chamber is connected by external oil circuit with the second chamber;
Be arranged on the switching control pilot on described external oil circuit;
Be arranged on the oil circuit that described volume adjustable hydraulic pump is connected with hydraulic rotary motor and control the selector valve that described hydraulic rotary motor stops and commutating; Wherein, the oil circuit that connects the hydraulic fluid port of described the first chamber and described selector valve is the first oil circuit, and the oil circuit that connects another hydraulic fluid port of described the second chamber and described selector valve is the second oil circuit;
Revolution equilibrium valve group, comprise the on-off control valve group being separately positioned on the first oil circuit and the second oil circuit, described on-off control valve group comprises one-way valve in parallel and switching control pilot, wherein, the conducting direction of one-way valve is hydraulic rotary motor oil-feed direction, switching control pilot conducting direction is the fuel-displaced direction of hydraulic rotary motor, and the conducting hydraulic fluid port that is arranged on the switching control pilot on the first oil circuit is communicated with described the second oil circuit, the conducting hydraulic fluid port that is arranged on the switching control pilot on the second oil circuit is communicated with described the first oil circuit;
Be arranged on described the first oil circuit and described the second oil circuit and for detection of the pressure transducer of the pressure difference of described the first chamber and described the second chamber;
The controller being connected with described pressure transducer and described switch valve, stops to described hydraulic rotary motor fuel feeding at described hydraulic variable displacement pump, and the pressure difference value that described compressive force sensor detects is while exceeding the pressure difference value of setting, controls described switch valve and opens.
2. hydraulic control system as claimed in claim 1, is characterized in that, described switch valve is two-position two-way solenoid valve, and described the first hydraulic fluid port is communicated with described the first chamber, and described the second hydraulic fluid port is communicated with described the second chamber; In the time that described two-position two-way solenoid valve is positioned at left position, described the first chamber and the second chamber are communicated with.
3. hydraulic control system as claimed in claim 2, it is characterized in that, described selector valve is three six three-way electromagnetic valves, and the first hydraulic fluid port of described three six three-way electromagnetic valves is communicated with fuel tank, the second hydraulic fluid port is communicated with described the first chamber, the 3rd hydraulic fluid port is communicated with described the second chamber, and the 4th hydraulic fluid port and the 5th hydraulic fluid port are communicated with described volume adjustable hydraulic pump, and the 6th hydraulic fluid port is communicated with fuel tank; Wherein, in the time that described three six three-way electromagnetic valves are positioned at left position, described volume adjustable hydraulic pump is communicated with described the first chamber; In the time that described three six three-way electromagnetic valves are positioned at meta, described volume adjustable hydraulic pump is communicated with described fuel tank; In the time that described three six three-way electromagnetic valves are positioned at right position, described volume adjustable hydraulic pump is communicated with described the second chamber.
4. the hydraulic control system as described in claim 1～3 any one, is characterized in that, described revolution equilibrium valve group also comprises shuttle valve, and the first control port of described shuttle valve is communicated with described the first oil circuit, and the second control port of described shuttle valve is communicated with the second oil circuit; Described hydraulic rotary motor also comprises break, and the control port of described break is communicated with the oil outlet of described shuttle valve.
5. hydraulic control system as claimed in claim 4, is characterized in that, described revolution equilibrium valve group also comprises two relief valves that are arranged between described the first oil circuit and the second oil circuit, and the conducting direction of described two relief valves is contrary.
6. a concrete pumping equipment, is characterized in that, comprises the hydraulic control system as described in claim 1～5 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420074061.8U CN203702701U (en) | 2014-02-20 | 2014-02-20 | Hydraulic control system and concrete pumping equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420074061.8U CN203702701U (en) | 2014-02-20 | 2014-02-20 | Hydraulic control system and concrete pumping equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203702701U true CN203702701U (en) | 2014-07-09 |
Family
ID=51053152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420074061.8U Expired - Lifetime CN203702701U (en) | 2014-02-20 | 2014-02-20 | Hydraulic control system and concrete pumping equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203702701U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110747937A (en) * | 2019-10-30 | 2020-02-04 | 上海三一重机股份有限公司 | Hydraulic auxiliary control system and excavator |
-
2014
- 2014-02-20 CN CN201420074061.8U patent/CN203702701U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110747937A (en) * | 2019-10-30 | 2020-02-04 | 上海三一重机股份有限公司 | Hydraulic auxiliary control system and excavator |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140709 |