CN201604624U - Tow type concrete pump and hydraulic control system of landing legs thereof - Google Patents

Tow type concrete pump and hydraulic control system of landing legs thereof Download PDF

Info

Publication number
CN201604624U
CN201604624U CN2010201071798U CN201020107179U CN201604624U CN 201604624 U CN201604624 U CN 201604624U CN 2010201071798 U CN2010201071798 U CN 2010201071798U CN 201020107179 U CN201020107179 U CN 201020107179U CN 201604624 U CN201604624 U CN 201604624U
Authority
CN
China
Prior art keywords
hydraulic fluid
control
fluid port
hydraulic
valve
Prior art date
Application number
CN2010201071798U
Other languages
Chinese (zh)
Inventor
徐怀玉
沈千里
路洪斌
孙风
贾建辉
Original Assignee
徐工集团工程机械股份有限公司建设机械分公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 徐工集团工程机械股份有限公司建设机械分公司 filed Critical 徐工集团工程机械股份有限公司建设机械分公司
Priority to CN2010201071798U priority Critical patent/CN201604624U/en
Application granted granted Critical
Publication of CN201604624U publication Critical patent/CN201604624U/en

Links

Abstract

The utility model discloses a hydraulic control system of the landing legs of a tow type concrete pump, which is used for controlling the stretching or withdrawing operation of each landing leg oil cylinder. The system comprises a three-position six-way reversing valve and hydraulic control one-way valves arranged correspondingly to each landing leg oil cylinder, wherein the opening size of the valve port of the three-position six-way reversing valve can be regulated. When the three-position six-way reversing valve is positioned in the neutral position, pressure oil directly returns an oil tank, and the rodless cavities of the landing leg oil cylinders are locked. Moreover, a hydraulic fluid port communicated with a rod cavity is conducted with a hydraulic fluid port communicated with an oil return way, therefore pressure oil of the rod cavity can be loaded under the condition of internal leakage of the landing leg oil cylinders, and the safety of the oil cylinders can be ensured. On the basis, the utility model also provides a tow type concrete pump with the control system.

Description

Towed concrete pump and supporting leg hydraulic control system thereof
Technical field
The utility model relates to concrete pumping machinery, has to relate to a kind of towed concrete pump and supporting leg hydraulic control system thereof.
Background technology
Towed concrete pump is as a kind of high efficiency concrete pumping machinery, and it is installed on the chassis that can tow, and is on-the-spot by pipeline concrete continuous is sent to cast, has maneuverability preferably.At present, be widely used in concrete workses such as skyscraper, colliery, mine, tunnel, railway, highway, bridges and culverts, harbour, water conservancy, electric power, defence engineering.
See also Fig. 1, this figure is the working state schematic representation of existing towed concrete pump.
During operation, to stretch out supporting leg usually and be supported on ground, to guarantee the stability of complete machine operation.Obviously, safety, the reliability of the operation of raising supporting leg are the bases of guaranteeing the industrial wheeled equipment working stability.The supporting leg mode of existing towed concrete pump is divided into two kinds substantially: a kind of is Purely mechanical, and the operator must rotate control handle, drives the leading screw rotation and makes supporting leg support; Yet this operating mode need consume too much time and muscle power; Another kind is the switch valve hydraulic control mode.
See also Fig. 2, this figure is the schematic diagram of existing towed concrete pump supporting leg hydraulic control system.As shown in the figure, this system controls being communicated with between the rodless cavity of each support oil cylinder 20 and rod chamber and pressure oil circuit P and the oil return circuit T respectively by 3-position 4-way switch valve 10; And, be in controllable state with the withdrawal of guaranteeing support oil cylinder 20 being provided with hydraulic control one-way valve 30 on the oil circuit between each support oil cylinder 20 and the 3-position 4-way switch valve 10.Obviously, the operator can finish the operation of stretching out or regaining of supporting leg by the bar handle of switch valve 10, can reduce operator's labour intensity greatly; But this switch valve 10 is controlled the cut-out of relevant oil circuit or is opened fully, that is to say, this mode still can't realize the control to the supporting leg stretching speed reliably, therefore, bearing pin inserts comparatively difficulty of operation, and to stretch out time of operation longer relatively thereby cause finishing supporting leg.
In addition; also there is such defective in above-mentioned control system: when the switch valve 10 of this system is in the meta state; when support oil cylinder 20 is inner to be let out in occurring (high-pressure and hydraulic oil from rodless cavity through the leakage of piston to rod chamber one side), can't realize protection to oil cylinder.
In view of this, demand urgently being optimized design, to overcome the above-mentioned defective that prior art exists at existing supporting leg hydraulic control system.
The utility model content
At above-mentioned defective, the technical matters that the utility model solves is, a kind of hydraulic control system of towed concrete pump supporting leg is provided, and with the flexible speed of effective control supporting leg, supporting leg stretches out or the controllability of recovery operation thereby improve.On this basis, the utility model also provides a kind of towed concrete pump with this control system.
The hydraulic control system of the towed concrete pump supporting leg that the utility model provides is used to control stretching out or recovery operation of some support oil cylinders, and this system comprises some hydraulic control one-way valves and three six-way transfer valves.
Corresponding with each support oil cylinder respectively setting of described some hydraulic control one-way valves; Under the normality, unidirectional conducting between first hydraulic fluid port to the second hydraulic fluid port of described hydraulic control one-way valve, under the effect of the control fluid that enters valve pocket through its control port, conducting between second hydraulic fluid port to the first hydraulic fluid port of described hydraulic control one-way valve; And the rodless cavity of each support oil cylinder and rod chamber are communicated with second hydraulic fluid port and the control port of corresponding hydraulic control one-way valve respectively.
The valve port opening scalable of described three six-way transfer valves; When this valve was positioned at first control position, oil circuit conducting, first hydraulic fluid port and the 4th hydraulic fluid port between the oil circuit conducting between its 5th hydraulic fluid port to the second hydraulic fluid port, the 3rd hydraulic fluid port to the six hydraulic fluid ports were all non-conduction; When this valve was positioned at second control position, oil circuit conducting, second hydraulic fluid port and the 5th hydraulic fluid port between the oil circuit conducting between its 4th hydraulic fluid port to the first hydraulic fluid port, the 3rd hydraulic fluid port to the six hydraulic fluid ports were all non-conduction; When this valve was positioned at the 3rd control position, oil circuit conducting, first hydraulic fluid port and the 4th hydraulic fluid port between the oil circuit conducting between its 5th hydraulic fluid port to the three hydraulic fluid ports, second hydraulic fluid port to the, six hydraulic fluid ports were all non-conduction; And first hydraulic fluid port and the 6th hydraulic fluid port of described three six-way transfer valves all are communicated with oil return circuit, second hydraulic fluid port is communicated with first hydraulic fluid port of described hydraulic control one-way valve, the 3rd hydraulic fluid port is communicated with the control port of described hydraulic control one-way valve and the rod chamber of support oil cylinder, and the 4th hydraulic fluid port and the 5th hydraulic fluid port are communicated with the pressure oil circuit respectively.
Preferably, described three six-way transfer valves are specially hand valve or hydraulic operated valve.
Preferably, also comprise some unidirectional back pressure valves, be separately positioned on the pipeline between the control port of the rod chamber of each support oil cylinder and hydraulic control one-way valve; Under the normality, the control port of described hydraulic control one-way valve is to the unidirectional conducting of oil circuit between the rod chamber of support oil cylinder; The oil liquid pressure of described support oil cylinder rod chamber is during greater than the settling pressure of described unidirectional back pressure valve, and the rod chamber of described support oil cylinder is to the oil circuit conducting between the control port of described hydraulic control one-way valve.
Preferably, described unidirectional back pressure valve is specifically integrated by a check valve and a by pass valve parallel connection.
Preferably, also comprise check valve, be arranged on the 5th hydraulic fluid port and the pipeline between the pressure oil circuit of described three six logical control cock, so that the pressure oil circuit is to the unidirectional conducting between the 5th hydraulic fluid port of described three six logical control cock.
Preferably, also comprise some bearing pins, corresponding with each support oil cylinder respectively setting; And, have the radial location hole on the cylinder barrel sidewall of described support oil cylinder, the cylinder bar external part of described support oil cylinder has the radially spacing hole that several are arranged in order vertically, inserts corresponding bearing pin so that the back is aimed at by a spacing hole on the cylinder bar with the knock hole on the cylinder barrel.
Preferably, also comprise by pass valve, place between pressure oil circuit and the oil return circuit.
The towed concrete pump that the utility model provides comprises some support oil cylinders, is symmetricly set on the vehicle frame body; The hydraulic control system that also comprises foregoing towed concrete pump supporting leg.
Preferably, described support oil cylinder is specially four.
Compared with prior art, use the hydraulic control system of the towed concrete pump supporting leg that the utility model provides, can enter the flow of the pressure oil liquid in each chamber of support oil cylinder by handle control, and then the control oil cylinder stretches out or the speed of recovery operation.That is to say that angle is big more, stretch out or the speed that bounces back fast more, therefore, improved the controllability of operation greatly.Simultaneously, when three six-way transfer valves that this system adopted are positioned at second control position (being meta), the rodless cavity of support oil cylinder is in closed state, the discharged mode of rod chamber, thereby make support oil cylinder under interior situation of letting out, the rod chamber pressure oil liquid can unload, thereby can guarantee the safety of oil cylinder.
Also comprise some unidirectional back pressure valves at preferred version of the present utility model, be separately positioned on the pipeline between the control port of the rod chamber of each support oil cylinder and hydraulic control one-way valve; Like this, have only when the oil liquid pressure of support oil cylinder rod chamber during greater than the settling pressure of this unidirectional back pressure valve, the fluid of rod chamber is just by should unidirectional back pressure valve unloading, thereby on the basis of assurance oil cylinder safety, can further control the supporting leg operational stability.
In another preferred version of the present utility model, have the radial location hole on the cylinder barrel sidewall of support oil cylinder, the cylinder bar external part of support oil cylinder has the radially spacing hole that several are arranged in order vertically; In the actual mechanical process, when support oil cylinder stretch out or be retracted on ideal operation position and the cylinder bar corresponding spacing hole with insert corresponding bearing pin after the knock hole on the cylinder barrel is aimed at, further to guarantee the oil cylinder support safety.
Supporting leg hydraulic control system described in the utility model can be used for the extension and contraction control of any engineering machinery chassis supporting leg, is specially adapted to towed concrete pump.
Description of drawings
Fig. 1 is the working state schematic representation of existing towed concrete pump;
Fig. 2 is the schematic diagram of existing towed concrete pump supporting leg hydraulic control system;
Fig. 3 is the integral structure scheme drawing of towed concrete pump described in the specific embodiment;
Fig. 4 is the hydraulic control system schematic diagram of the supporting leg of towed concrete pump described in the specific embodiment;
Fig. 5 is the I portion enlarged drawing of Fig. 3.
Among Fig. 3-5:
Chassis 1, vehicle frame body 11, support oil cylinder 12, knock hole 121, spacing hole 122;
Hydraulic control one-way valve 13, first hydraulic fluid port 131, second hydraulic fluid port 132, the first control port 133a, the second control port 133b;
Three six-way transfer valves 14, first hydraulic fluid port 141, second hydraulic fluid port 142, the 3rd hydraulic fluid port 143, the 4th hydraulic fluid port 144, the 5th hydraulic fluid port 145, the 6th hydraulic fluid port 146;
Unidirectional back pressure valve 15, check valve 151, by pass valve 152;
Check valve 16;
By pass valve 17;
Bearing pin 18.
The specific embodiment
The utility model is based on the improvement design that existing towed concrete pump supporting leg control system is made, its core is that this design of control valve is that valve port opening is adjustable, fluid flow with effective control support oil cylinder two chambeies, thereby the flexible speed of control supporting leg, raising supporting leg are stretched out or the controllability of recovery operation; And the meta function of this control cock adopts rodless cavity sealing, the discharged mode of rod chamber, and so design makes support oil cylinder under interior situation of letting out, and the pressure oil liquid of rod chamber can unload, thereby guarantees the safety of support oil cylinder.
Specify present embodiment below in conjunction with Figure of description.
See also Fig. 3, this figure is the integral structure scheme drawing of the described towed concrete pump of present embodiment.
Towed concrete pump is mainly by chassis and place the main function components such as main power system, pumparound, hydraulic pressure and electric-control system on the chassis to constitute.Need to prove that the basic structure and the prior art of aforementioned main function components are identical, those skilled in the art can realize fully based on prior art, so this paper gives unnecessary details no longer one by one.This paper only is described in detail at the support oil cylinder control technology on chassis.
In this programme, the basic structure on chassis 1 is same as the prior art, comprises vehicle frame body 11 and four support oil cylinders 12 that are symmetricly set on the vehicle frame body 11 equally.Former and later two support oil cylinders that only show chassis 1 one sides among the figure.
Be without loss of generality, see also Fig. 4, this figure is the hydraulic control system with two support oil cylinders towed concrete pump supporting leg that is example.Should be appreciated that the core concept of this system is applicable to the control of plural a plurality of support oil cylinders, such as four.
Hydraulic control one-way valve 13 respectively with corresponding support oil cylinder 12 corresponding settings, that is to say that each support oil cylinder 12 correspondence is provided with a hydraulic control one-way valve 13.Under the normality, unidirectional conducting between first hydraulic fluid port, 131 to second hydraulic fluid ports 132 of this hydraulic control one-way valve 13, under the effect of the control fluid that enters valve pocket through its control port, conducting between second hydraulic fluid port, 132 to first hydraulic fluid ports 131 of this hydraulic control one-way valve 13; And the rodless cavity of each support oil cylinder 12 and rod chamber are communicated with second hydraulic fluid port 132 and the control port 133a of corresponding hydraulic control one-way valve 13 respectively.
Need to prove that hydraulic control one-way valve described in this programme 13 has the first control port 133a and the second control port 133b of connection, wherein, the second control port 133b is used for being communicated with system oil-way, specifically vide infra.In fact, also can a control port only be set or only use a control port according to the practical set space.
Shown in the figure, three six-way transfer valves 14 are hand valve, and the operator can adjust the aperture of valve port by handle, with the feed liquor oil mass of control support oil cylinder rodless cavity or rod chamber.Certainly, this change-over valve also can adopt guide's hydraulic control aperture.When this valve was positioned at first control position (position, a left side), oil circuit conducting, first hydraulic fluid port 141 and the 4th hydraulic fluid port 144 between the oil circuit conducting between its 5th hydraulic fluid port 145 to second hydraulic fluid ports 142, the 3rd hydraulic fluid port 143 to the 6th hydraulic fluid ports 146 were all non-conduction; When this valve was positioned at second control position (meta), oil circuit conducting, second hydraulic fluid port 142 and the 5th hydraulic fluid port 145 between the oil circuit conducting between its 4th hydraulic fluid port 144 to first hydraulic fluid ports 141, the 3rd hydraulic fluid port 143 to the 6th hydraulic fluid ports 146 were all non-conduction; When this valve was positioned at the 3rd control position (right position), oil circuit conducting, first hydraulic fluid port 141 and the 4th hydraulic fluid port 144 between the oil circuit conducting between its 5th hydraulic fluid port 145 to the 3rd hydraulic fluid ports 143, second hydraulic fluid port, 142 to the 6th hydraulic fluid ports 146 were all non-conduction.
In this hydraulic control system, first hydraulic fluid port 141 and the 6th hydraulic fluid port 146 of three six-way transfer valves 14 all are communicated with oil return circuit T, second hydraulic fluid port 142 is communicated with first hydraulic fluid port 131 of hydraulic control one-way valve 13, the 3rd hydraulic fluid port 143 is communicated with the second control port 133b of hydraulic control one-way valve 13, and the 4th hydraulic fluid port 144 and the 5th hydraulic fluid port 145 are communicated with pressure oil circuit P respectively.
In addition, on the pipeline between the first control port 133a of the rod chamber of each support oil cylinder 12 and hydraulic control one-way valve 13, be respectively arranged with unidirectional back pressure valve 15; When this unidirectional back pressure valve 15 was in the normal state, the first control port 133a of hydraulic control one-way valve 13 was to the unidirectional conducting of oil circuit between the rod chamber of support oil cylinder 12; And when the oil liquid pressure of support oil cylinder 12 rod chambers during greater than the settling pressure of unidirectional back pressure valve 15, the rod chamber of support oil cylinder 12 is to the oil circuit conducting between the first control port 133a of hydraulic control one-way valve 13.Particularly, as shown in the figure, this unidirectional back pressure valve 15 is in parallel integrated by a check valve 151 and a by pass valve 152, and the settling pressure of this by pass valve 152 can be determined according to concrete application operating mode, such as 3Mp.
As shown in Figure 4, this programme comprises that also being arranged on three six leads to the 5th hydraulic fluid port 145 of control cock 14 and the check valve 16 on the pipeline between the pressure oil circuit P, so that the unidirectional conducting between the 5th hydraulic fluid port 145 of pressure oil circuit P to three six logical control cock 14.In addition, between system pressure oil circuit P and oil return circuit T, be provided with the by pass valve 17 of setting up operation pressure.
The principle of work of the hydraulic control system of the described towed concrete pump supporting leg of following brief description present embodiment.
Supporting leg stretches out operation: handle three six-way transfer valves 14 and be positioned at left side position, hydraulic oil enters the rodless cavity of support oil cylinder 12 successively through check valve 16, three six-way transfer valves 14 and hydraulic control one-way valve 13; Along with moving of piston, when the oil liquid pressure of support oil cylinder 12 rod chambers during greater than the settling pressure of unidirectional back pressure valve 15, the fluid of rod chamber is through unidirectional back pressure valve 15 unloadings.So far, finish the operation of stretching out of supporting leg.
The supporting leg recovery operation: handle three six-way transfer valves 14 and be positioned at right position, hydraulic oil enters the rod chamber of support oil cylinder 12 successively through check valve 16, three six-way transfer valves 14 and unidirectional back pressure valve 15; Meanwhile, after pressure oil liquid acts on the control port of hydraulic control one-way valve 13, second hydraulic fluid port, 132 to first hydraulic fluid ports, 131 conductings of hydraulic control one-way valve 13, the fluid of rodless cavity is through hydraulic control one-way valve 13 unloadings.So far, finish the recovery operation of supporting leg.
Need to prove especially, when three six-way transfer valves 14 are positioned at meta, the direct oil sump tank of pressure oil, the rodless cavity of support oil cylinder 12 is locked; And, its 3rd hydraulic fluid port 143 and 146 conductings of the 6th hydraulic fluid port, thus make support oil cylinder under interior situation of letting out, and the rod chamber pressure oil liquid can unload, thereby can guarantee the safety of oil cylinder.
In the above-mentioned adjustment process, when supporting leg stretches out or be retracted to the ideal operation position, must increase the possibility of letting out in the support oil cylinder during load operation.For this reason, have radial location hole 121 on the cylinder barrel sidewall of the support oil cylinder 12 of this programme, the cylinder bar external part of support oil cylinder 12 has the radially spacing hole 122 that several are arranged in order vertically; Please in the lump referring to Fig. 5, this figure is the I portion enlarged drawing of Fig. 3.
In the actual mechanical process, when support oil cylinder 12 stretch out or be retracted on ideal operation position and the cylinder bar corresponding spacing hole with insert corresponding bearing pin 18 after the knock hole on the cylinder barrel is aimed at, further to guarantee the oil cylinder support safety.That is to say that when oil cylinder stretches out or bounces back to when needing the position, handle resets, inserts bearing pin, thereby between the cylinder barrel of support oil cylinder, cylinder bar, set up the support relation of rigidity, the possibility of letting out in effectively avoiding occurring.
The above only is a preferred implementation of the present utility model; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.

Claims (9)

1. the hydraulic control system of towed concrete pump supporting leg is used to control stretching out or recovery operation of some support oil cylinders, and this system comprises:
Some hydraulic control one-way valves, corresponding with each support oil cylinder respectively setting; Under the normality, unidirectional conducting between first hydraulic fluid port to the second hydraulic fluid port of described hydraulic control one-way valve, under the effect of the control fluid that enters valve pocket through its control port, conducting between second hydraulic fluid port to the first hydraulic fluid port of described hydraulic control one-way valve; And the rodless cavity of each support oil cylinder and rod chamber are communicated with second hydraulic fluid port and the control port of corresponding hydraulic control one-way valve respectively; It is characterized in that, also comprise:
Three six-way transfer valves, its valve port opening scalable; When this valve was positioned at first control position, oil circuit conducting, first hydraulic fluid port and the 4th hydraulic fluid port between the oil circuit conducting between its 5th hydraulic fluid port to the second hydraulic fluid port, the 3rd hydraulic fluid port to the six hydraulic fluid ports were all non-conduction; When this valve was positioned at second control position, oil circuit conducting, second hydraulic fluid port and the 5th hydraulic fluid port between the oil circuit conducting between its 4th hydraulic fluid port to the first hydraulic fluid port, the 3rd hydraulic fluid port to the six hydraulic fluid ports were all non-conduction; When this valve was positioned at the 3rd control position, oil circuit conducting, first hydraulic fluid port and the 4th hydraulic fluid port between the oil circuit conducting between its 5th hydraulic fluid port to the three hydraulic fluid ports, second hydraulic fluid port to the, six hydraulic fluid ports were all non-conduction; And
First hydraulic fluid port and the 6th hydraulic fluid port of described three six-way transfer valves all are communicated with oil return circuit, second hydraulic fluid port is communicated with first hydraulic fluid port of described hydraulic control one-way valve, the 3rd hydraulic fluid port is communicated with the control port of described hydraulic control one-way valve and the rod chamber of support oil cylinder, and the 4th hydraulic fluid port and the 5th hydraulic fluid port are communicated with the pressure oil circuit respectively.
2. the hydraulic control system of towed concrete pump supporting leg according to claim 1 is characterized in that, described three six-way transfer valves are specially hand valve or hydraulic operated valve.
3. the hydraulic control system of towed concrete pump supporting leg according to claim 2 is characterized in that, also comprises some unidirectional back pressure valves, is separately positioned on the pipeline between the control port of the rod chamber of each support oil cylinder and hydraulic control one-way valve; Under the normality, the control port of described hydraulic control one-way valve is to the unidirectional conducting of oil circuit between the rod chamber of support oil cylinder; The oil liquid pressure of described support oil cylinder rod chamber is during greater than the settling pressure of described unidirectional back pressure valve, and the rod chamber of described support oil cylinder is to the oil circuit conducting between the control port of described hydraulic control one-way valve.
4. the hydraulic control system of towed concrete pump supporting leg according to claim 3 is characterized in that, described unidirectional back pressure valve is specifically integrated by a check valve and a by pass valve parallel connection.
5. the hydraulic control system of towed concrete pump supporting leg according to claim 2 is characterized in that, also comprises:
Check valve is arranged on the 5th hydraulic fluid port and the pipeline between the pressure oil circuit of described three six logical control cock, so that the pressure oil circuit is to the unidirectional conducting between the 5th hydraulic fluid port of described three six logical control cock.
6. according to the hydraulic control system of each described towed concrete pump supporting leg in the claim 1 to 5, it is characterized in that, also comprise:
Some bearing pins, corresponding with each support oil cylinder respectively setting; And, have the radial location hole on the cylinder barrel sidewall of described support oil cylinder, the cylinder bar external part of described support oil cylinder has the radially spacing hole that several are arranged in order vertically, inserts corresponding bearing pin so that the back is aimed at by a spacing hole on the cylinder bar with the knock hole on the cylinder barrel.
7. the hydraulic control system of towed concrete pump supporting leg according to claim 6 is characterized in that, also comprises:
By pass valve places between pressure oil circuit and the oil return circuit.
8. towed concrete pump comprises some support oil cylinders, is symmetricly set on the vehicle frame body; It is characterized in that, also comprise hydraulic control system as each described towed concrete pump supporting leg in the claim 1 to 7.
9. 8 described towed concrete pumps as requested is characterized in that described support oil cylinder is specially four.
CN2010201071798U 2010-01-25 2010-01-25 Tow type concrete pump and hydraulic control system of landing legs thereof CN201604624U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010201071798U CN201604624U (en) 2010-01-25 2010-01-25 Tow type concrete pump and hydraulic control system of landing legs thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010201071798U CN201604624U (en) 2010-01-25 2010-01-25 Tow type concrete pump and hydraulic control system of landing legs thereof

Publications (1)

Publication Number Publication Date
CN201604624U true CN201604624U (en) 2010-10-13

Family

ID=42949333

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2010201071798U CN201604624U (en) 2010-01-25 2010-01-25 Tow type concrete pump and hydraulic control system of landing legs thereof

Country Status (1)

Country Link
CN (1) CN201604624U (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102079298A (en) * 2010-12-28 2011-06-01 三一重工股份有限公司 Mobile engineering machine and control system of support leg thereof
CN102562062A (en) * 2010-12-14 2012-07-11 玛珂系统分析和开发有限公司 Mining device
CN102826492A (en) * 2012-08-09 2012-12-19 长沙中联消防机械有限公司 Slide bar control device and overhead working truck applying same
CN102996553A (en) * 2012-11-27 2013-03-27 三一重工股份有限公司 Support leg hydraulic system and engineering machinery
CN105035041A (en) * 2015-09-10 2015-11-11 徐工集团工程机械股份有限公司科技分公司 Engineering truck support leg electrohydraulic control system, method, detection method and engineering truck

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102562062A (en) * 2010-12-14 2012-07-11 玛珂系统分析和开发有限公司 Mining device
CN102079298A (en) * 2010-12-28 2011-06-01 三一重工股份有限公司 Mobile engineering machine and control system of support leg thereof
CN102079298B (en) * 2010-12-28 2013-06-05 三一重工股份有限公司 Mobile engineering machine and control system of support leg thereof
CN102826492A (en) * 2012-08-09 2012-12-19 长沙中联消防机械有限公司 Slide bar control device and overhead working truck applying same
CN102826492B (en) * 2012-08-09 2014-12-17 长沙中联消防机械有限公司 Slide bar control device and overhead working truck applying same
CN102996553A (en) * 2012-11-27 2013-03-27 三一重工股份有限公司 Support leg hydraulic system and engineering machinery
CN102996553B (en) * 2012-11-27 2015-06-10 三一重工股份有限公司 Support leg hydraulic system and engineering machinery
CN105035041A (en) * 2015-09-10 2015-11-11 徐工集团工程机械股份有限公司科技分公司 Engineering truck support leg electrohydraulic control system, method, detection method and engineering truck
CN105035041B (en) * 2015-09-10 2017-06-06 徐工集团工程机械股份有限公司科技分公司 The electrohydraulic control system of engineering vehicle's supporting legs, method, detection method and engineering truck

Similar Documents

Publication Publication Date Title
CN102673639B (en) Hydraulic steering control system and crane with system
CN201442827U (en) Ultra-thin hydraulic lifter hydraulic system
CN103089757B (en) Closed hydraulic loop hot oil displacement system and concrete pumping device
CN104912138B (en) Hybrid power excavator movable arm potential energy recovery system and work method thereof
IN2012DN03183A (en)
CN204357821U (en) A kind of mechanical self-locking hydraulic cylinder
CN2881144Y (en) Pumping structure capable of easy changing concrete piston
CN204061372U (en) A kind of oil hydraulic cylinder quick-expansion control loop
CN102134047B (en) Energy-saving hydraulic system of electric forklift
CN103032396A (en) Energy-saving shield segment assembling and positioning electro-hydraulic control system adopting load-sensitive technology
CN201818571U (en) Hydraulic system controlling two oil cylinders to sequentially telescope
CN101315088B (en) Horizontal roller hydraulic circuit system with pressure-relief protection function
CN103452149B (en) Potential energy recovery hydraulic control device for movable arm of excavator
CN104061212B (en) Electric hydraulic control running system for bracket carrier
CN201661532U (en) Hydraulic pumping system of concrete pump
CN103438034B (en) The hydraulic system of single-cylinder bolt type telescopic boom and controlling method, hoist
CN101408107A (en) Energy-saving type shield propulsion hydraulic system by using zone control
CN206234174U (en) A kind of fluid pressure drive device
CN102705275B (en) Hydraulic control system for bolt and engineering machinery
CN202690570U (en) Hydraulic cylinder, hydraulic circuit, material pumping system and engineering machinery
CN103291685A (en) Low-load high speed/heavy-load low speed cylinder
BRPI0811147B1 (en) Hydraulic load control valve device
KR20130143550A (en) Hydraulic excavator main valve and hydraulic excavator having same
CN204199367U (en) The excavator control system of oil-liquid hybrid electric
CN105738100B (en) A kind of hydro-pneumatic spring performance test system and test method

Legal Events

Date Code Title Description
GR01 Patent grant
C14 Grant of patent or utility model
C41 Transfer of patent application or patent right or utility model
ASS Succession or assignment of patent right

Owner name: XUZHOU XUGONG SCHWING MACHINERY CO., LTD.

Free format text: FORMER OWNER: BUILDING MACHINERY CO., LTD., XCMG CONSTRUCTION MACHINERY CO., LTD.

Effective date: 20130424

TR01 Transfer of patent right

Effective date of registration: 20130424

Address after: 221004 No. 29, Peach Road, Xuzhou economic and Technological Development Zone, Jiangsu, Xuzhou

Patentee after: XCMG Schwing Machinery Co., Ltd.

Address before: 221004 No. 19 Peach Road, Xuzhou Economic Development Zone, Jiangsu, China

Patentee before: Building Machinery Co., Ltd., XCMG Construction Machinery Co., Ltd.

Effective date of registration: 20130424

Address after: 221004 No. 29, Peach Road, Xuzhou economic and Technological Development Zone, Jiangsu, Xuzhou

Patentee after: XCMG Schwing Machinery Co., Ltd.

Address before: 221004 No. 19 Peach Road, Xuzhou Economic Development Zone, Jiangsu, China

Patentee before: Building Machinery Co., Ltd., XCMG Construction Machinery Co., Ltd.

CX01 Expiry of patent term

Granted publication date: 20101013

CX01 Expiry of patent term