CN202937013U - Boom hydraulic system, boom system and concrete pumping equipment - Google Patents
Boom hydraulic system, boom system and concrete pumping equipment Download PDFInfo
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- CN202937013U CN202937013U CN 201220664094 CN201220664094U CN202937013U CN 202937013 U CN202937013 U CN 202937013U CN 201220664094 CN201220664094 CN 201220664094 CN 201220664094 U CN201220664094 U CN 201220664094U CN 202937013 U CN202937013 U CN 202937013U
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- 238000005086 pumping Methods 0.000 title claims abstract description 15
- 239000012530 fluid Substances 0.000 claims abstract description 17
- 239000002828 fuel tank Substances 0.000 claims description 16
- 238000001514 detection method Methods 0.000 claims description 5
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 description 20
- 239000000446 fuel Substances 0.000 description 6
- 238000011084 recovery Methods 0.000 description 6
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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Abstract
The utility model discloses a cantilever crane hydraulic system, including cantilever crane hydro-cylinder and main change valve, main change valve is through the no pole chamber of first working oil circuit and second working oil circuit and cantilever crane hydro-cylinder and have the pole chamber intercommunication respectively, wherein be provided with first balanced valve on the first working oil circuit, the first control oil circuit and the second working oil circuit intercommunication of this first balanced valve, first control oil circuit other has connect the switching-over valve on the road, and state and be provided with the check valve that allows fluid to flow to first balanced valve from the second working oil circuit on the first control oil circuit, the other reverse oil mouth side at the check valve that connects of switching-over valve, and the switching-over valve can also make first control oil circuit and pressure oil source communicate or break off selectively. The utility model also provides an arm support system that can use this arm support hydraulic system and a concrete pumping equipment who uses this arm support system. Therefore, after the boom is recovered, the boom is stably recovered on the boom support by reopening the first balance valve, so that the problem that the boom is upwarped is solved.
Description
Technical field
The utility model relates to the hydraulic control field that the jib exhibition is received, and particularly, relates to a kind of jib hydraulic system, uses the boom system of this jib hydraulic system and the concrete pumping equipment of this boom system of use.
Background technology
Concrete pumping equipment is to utilize concrete pump, the concrete of certain characteristic is pumped into the appointed place by conveyance conduit completes a kind of engineering mechanical device of building.Its conveyance conduit has interim laying, as drags pump, Vehicle loaded pump etc.Also have just to have the relatively-stationary conveyance conduit that is assemblied on equipment when dispatching from the factory, as the boom system of concrete mixer.Conveyance conduit is fixed on pumping vehicle arm rack, after stretching by jib with concrete conveyance to certain building a little.Wherein, the boom system of concrete mixer is towards long-armed, multi-arm joint, light-weighted future development, requires also more and more higher to the control system of jib telescopic motion.Require the jib rate of stretch soon, steadily to impact little.
At present, the jib hydraulic system of controlling jib exhibition receipts adopts the multiple directional control valve valve of bringing onto load feedback to control usually, control jib revolution and stretching speed by multi-way reversing valve opening size, arm support oil cylinder rodless cavity and rod chamber hydraulic fluid port all are equipped with equalizing valve, guarantee that the jib motion is steady and can rest on reliably a certain position, and can make the jib motion steadily, and the impact of releasing the pressure.
Wherein, jib jib sometimes may occur and upwarp phenomenon after regaining fully, and namely jib is not supported in the jib support fully.As untimely elimination, jib will produce vibration in the pump truck driving process, and this will aggravate the fatigue failure of jib, thereby cause slightly vibrations wearing and tearing cylinder seal spare of arm support oil cylinder, reduce jib reliability and application life thereof.In prior art, usually continue to retract to complete to eliminate by control main reversing valve 2 control arm support oil cylinder with operator and upwarp, yet the mode that this arm support oil cylinder of completing by manual control pressure oil is retracted easily causes arm support oil cylinder to suppress the problems such as cylinder, and is unfavorable to the life-span of arm support oil cylinder.
The utility model content
The purpose of this utility model is to provide a kind of jib hydraulic system, and this jib hydraulic system can solve the problem that upwarps after the jib withdrawal is completed.
Another purpose of the present utility model is to provide a kind of boom system, the jib HYDRAULIC CONTROL SYSTEM jib that this boom system uses the utility model to provide.
Another purpose of the present utility model is to provide a kind of concrete pumping equipment, the boom system that this concrete pumping equipment uses the utility model to provide.
to achieve these goals, the utility model provides a kind of jib hydraulic system, comprise arm support oil cylinder and main reversing valve, described main reversing valve is communicated with rodless cavity and the rod chamber of described arm support oil cylinder by the first working oil path and the second working oil path respectively, be provided with the first equalizing valve on wherein said the first working oil path, the first oil circuit control of this first equalizing valve is communicated with described the second working oil path, wherein, the other reversal valve that is connected on described the first oil circuit control, and be provided with on described the first oil circuit control and allow fluid to flow to the one way valve of described the first equalizing valve from described the second working oil path, the other reverse hydraulic fluid port side that is connected on described one way valve of described reversal valve, and described reversal valve can also make described the first oil circuit control selectively be communicated with or disconnect with pressure oil-source.
Preferably, described the first equalizing valve comprises the first one way valve and the first external control sequence valve that is connected in parallel, described the first one way valve allows the fluid of described main reversing valve to flow to described rodless cavity, and the switching of described the first external control sequence valve is controlled by described the first oil circuit control.
Preferably, be provided with the second equalizing valve on described the second working oil path, the second oil circuit control of described the second equalizing valve is communicated with described the first working oil path, wherein, described the second equalizing valve comprises the second one way valve and the second external control sequence valve that is connected in parallel, described the second one way valve allows the fluid of described main reversing valve to flow to described rod chamber, and the switching of described the second external control sequence valve is controlled by described the second oil circuit control.
Preferably, described reversal valve is three position directional valve, and this three position directional valve connects respectively described fuel tank and described pressure oil-source, and an actuator port of this three-position valve is communicated with described the first oil circuit control.
According on the other hand of the present utility model, a kind of boom system is provided, comprise that jib supports, can be retracted in the jib in this jib support and the jib hydraulic system of controlling this jib, it is characterized in that, the jib hydraulic system that described hydraulic system provides for the utility model, and described boom system also comprises controller and the checkout gear of mutual electrical connection, whether described checkout gear can detect described jib and upwarp, described controller can pass through described reversal valve, controls described the first oil circuit control and selectively is communicated with or disconnects with pressure oil-source.
Preferably, described checkout gear is the angular transducer for detection of the angle between described jib and horizontal plane, or the displacement transducer that whether puts in place for detection of the retraction stroke of described arm support oil cylinder.
Provide a kind of concrete pumping equipment more on the one hand according to of the present utility model, comprise boom system, it is characterized in that the boom system that described boom system provides for the utility model.
Preferably, described concrete pumping equipment is concrete mixer.
pass through technique scheme, after the jib recovery is completed, the jib hydraulic system that the utility model provides can be by the switching of reversal valve, making pressure oil-source is separately the first oil circuit control fuel feeding, this moment is due to the existence of one way valve, the pressure oil that is supplied in the first oil circuit control by pressure oil-source can not enter in the second working oil path, thereby can reopen the first equalizing valve, at this moment, can be under the Action of Gravity Field of jib, make the rodless cavity of arm support oil cylinder continue appropriate oil return, support and make jib stably be retracted in jib, thereby solve after the jib recovery is completed, the jib that occurs upwarps problem.
Other feature and advantage of the present utility model will partly be described in detail in the specific embodiment subsequently.
Description of drawings
Accompanying drawing is to be used to provide further understanding of the present utility model, and consists of the part of manual, is used from explanation the utility model with the following specific embodiment one, but does not consist of restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the structural principle schematic diagram of the jib hydraulic system that provides of the utility model preferred embodiment.
Description of reference numerals
1 arm support oil cylinder 2 main reversing valves
3 first equalizing valve 4 reversal valves
5 one way valve 6 counterbalance valves
7 second equalizing valve 8 controllers
11 rodless cavity 12 rod chambers
31 first one way valve 32 first sequence valves
33 first overflow valve 71 second one way valves
72 second sequence valve 73 second overflow valves
3a first oil circuit control 7a the second oil circuit control
A first working oil path B the second working oil path
P, P ' pressure oil-source T, T ', T " fuel tank
The specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is elaborated.Should be understood that, the specific embodiment described herein only is used for description and interpretation the utility model, is not limited to the utility model.
At first need to prove, the utility model relates to the hydraulic controlled operation field in Hydraulic Field, wherein those skilled in the art can be understood that, " oil circuits " such as mentioned working oil path and oil circuit controls can be to realize by the pipeline between parts, can pass through the runner realization of components interior etc., the utility model does not limit this yet.In addition, for first, second working oil path A, the B that are connected with main reversing valve, it is identical with the duty of corresponding main reversing valve actuator port that those skilled in the art also can be directly acquainted with its duty.In addition, for pressure oil-source P, P ' can be the device that various hydraulic pumps etc. can provide pressure oil, and fuel tank T, T ', T " can be a plurality of independent fuel tanks, can be also a total fuel tank.For the common practise in this type of this area, the utility model is not done too much and is given unnecessary details.The concrete pumping equipment that following the utility model provides with the utility model in connection with accompanying drawing, particularly concrete mixer are example, introduce jib hydraulic system and the application of control method in boom system thereof that the utility model provides.Need to prove, the jib hydraulic system that the utility model provides can also be used for other various needs and carry out the hydraulic system that jib is controlled, and the utility model does not limit its application.
as shown in Figure 1, a kind of jib hydraulic system and control method thereof that the utility model provides, wherein, comprise arm support oil cylinder 1 and main reversing valve 2, in order to realize that row is taken in the exhibition of jib to be controlled, namely, realize the flexible of arm support oil cylinder, main reversing valve 2 is communicated with rodless cavity 11 and the rod chamber 12 of arm support oil cylinder 1 by the first working oil path A and the second working oil path B respectively, wherein knownly, main reversing valve 2 is connected with respectively pressure oil-source P ' and fuel tank T ', it can be independent commutation valve member, but usually adopt the form of multiple directional control valve to be used as main reversing valve with the various operations of Control Engineering machinery in large-scale engineering machinery.Therefore, main reversing valve 2 can be controlled respectively the flexible of arm support oil cylinder, particularly, when the needs arm support oil cylinder was stretched out, main reversing valve 2 was to the first working oil path A fuel feeding, and the second working oil path B is as the use of oil return, otherwise, when 2 casees second working oil path B fuel feeding of main reversing valve, the first working oil path A as the use of oil return, realizes the retraction of arm support oil cylinder this moment.
Wherein, for the exhibition that makes jib is received process steadily and safety, be provided with the first equalizing valve 3 on the first working oil path A, be provided with the second equalizing valve 7 on the second working oil path B, and the first oil circuit control 3a of this first equalizing valve 3 is communicated with the second working oil path B, and the second oil circuit control 7a of the second equalizing valve 7 is communicated with the first working oil path A.Therefore, can make the equalizing valve on the opposite side working oil path open when a side working oil path oil-feed, and realize the steady and safety of jib in exhibition receipts process.Wherein, equalizing valve is parts well known in the art, it usually can be used in and carries out in the processes such as luffing range of cantilever support to engineering machinery, exhibition receipts as speed governing, speed limit, the control such as locked, with can easy motion in realizing at jib at luffing, opening up the process such as receipts and be effectively controlled.
Equalizing valve as the utility model typical way, the first equalizing valve 3 comprises the first one way valve 31 and the first external control sequence valve 32 that is connected in parallel, the first one way valve 31 allows the fluid of main reversing valve 2 to flow to rodless cavity 11, and the switching of the first external control sequence valve 32 is controlled by the first oil circuit control 3a.The second equalizing valve 7 comprises that the second one way valve 71 and the second external control sequence valve 72, the second one way valves 71 that are connected in parallel allow the fluid of main reversing valve 2 to flow to rod chamber 12, and the switching of the second external control sequence valve 72 is controlled by the second oil circuit control 7a.Namely, equalizing valve 5 of the present utility model adopts the mode of speed limit hydraulic lock, it can comprise one way valve and the external control sequence valve that is connected in parallel, wherein one way valve is only to allow fluid to flow into the direction installation of rodless cavity 11 and the rod chamber 12 of arm support oil cylinder 1, the external control sequence valve is controlled by corresponding oil circuit control and is opened and closed, that is, when the fluid that needs arm support oil cylinder rod chamber and rodless cavity flows out, need to open corresponding sequence valve by oil circuit control and just can.In addition, in two equalizing valves of the utility model body, overflow valve also is set, i.e. the first overflow valve 33 in the first equalizing valve 3 and the second overflow valve 73 in the second equalizing valve 3, wherein the working connection of equalizing valve and oil circuit control all can be communicated with overflow valve 73 separately, thereby in oil pressure when overload in valve, the overflow valve by separately is back to mailbox T ", to guarantee the reliable and safety of equalizing valve.
Reclaim operation as example take the needs jib, i.e. the second working oil path B oil-feed, and the first working oil path A oil return.At this moment, need the control oil of the first oil circuit control 3a open the first sequence valve 32 in this first equalizing valve 3 can make fluid from the rodless cavity 11 of arm support oil cylinder 1 through main reversing valve 2 oil returns, therefore, can be by controlling this first equalizing valve 3 the withdrawal process of arm support oil cylinder 1 be carried out speed limit or locked etc. control, with guarantee the jib removal process steadily and safety.Otherwise, when jib is put on display, can make the exhibition process steadily and safety by the second equalizing valve 7.Need to prove; although preferred embodiment of the present utility model is controlled as the basis take the equalizing valve of said structure; but in NM embodiment; can also use other equalizing valves well known in the art; as long as can realize the purpose of this utility model, selecting of various equalizing valves all should drop in protection domain of the present utility model.
Therefore, in order to solve the problem of jib of the prior art excessive velocities when supporting near jib, in the utility model, the upper other reversal valve 4 that is connected to of the first oil circuit control 3a of the first equalizing valve 3, this reversal valve 4 can be controlled the first oil circuit control 3a and selectively is communicated with or disconnects with fuel tank T, and is provided with counterbalance valve 6 between reversal valve 4 and fuel tank T.Therefore, when needs reduce the recovery speed of jib, only need by reversal valve 4, the first oil circuit control 3a to be communicated with fuel tank T to get final product, this moment the first oil circuit control 3a control oil will through counterbalance valve 6 to fuel tank T draining, this moment, the pressure of the control oil in the first oil circuit control 3a will step-down, thereby the valve port opening of controlling the first equalizing valve 3 diminishes, and the oil return speed that then can control arm support oil cylinder 1 reduces, that is, make the recovery speed of jib slack-off.Wherein, due to the existence of counterbalance valve 6, the pressure in the first oil circuit control 3a can not reduce to zero, makes the first equalizing valve 3 can not close, and also can not make the pressure decreased in the second working oil path B is zero.Therefore can guarantee the normal operation of the jib hydraulic system that the utility model provides, guarantee that jib can continue to regain.
Need to prove that the embodiment that can realize technical solutions of the utility model has multiple, for example, the kind of counterbalance valve 6 can be the choke valve in the utility model preferred embodiment, it can also be overflow valve, sequence valve etc. can be set up back pressure in oil circuit valve, the utility model for convenience of description, in this introduction preferred embodiment wherein, this preferred embodiment only is used for explanation the utility model, is not limited to the utility model.
Except the problem to the jib impact of saying in background technology, jib jib sometimes also may occur and upwarp phenomenon after regaining fully, and namely jib is not supported in the jib support fully.As untimely elimination, jib will produce vibration in the pump truck driving process, and this will aggravate the fatigue failure of jib, thereby cause slightly vibrations wearing and tearing cylinder seal spare of arm support oil cylinder, reduce jib reliability and application life thereof.In prior art, usually continue to retract to complete to eliminate by control main reversing valve 2 control arm support oil cylinder with operator and upwarp, yet the mode that this arm support oil cylinder of completing by manual control pressure oil is retracted easily causes arm support oil cylinder to suppress the problems such as cylinder, and is unfavorable to the life-span of arm support oil cylinder.
For the problems referred to above, in the jib hydraulic system that the utility model provides, can also be after jib be regained the operating mode end, be that main reversing valve is when stopping the second working oil path B fuel feeding, the rodless cavity 11 that still can control arm support oil cylinder 1 continues oil return under the jib action of gravitation, upwarp the line phenomenon and eliminate jib, make stably folding and unfolding of jib on jib supports.Wherein, also be provided with on the first oil circuit control 3a and allow fluid to flow to the one way valve 5 of the first equalizing valve 3 from the second working oil path B, the other reverse hydraulic fluid port side that is connected on one way valve 5 of reversal valve 4, and reversal valve 4 can also make the first oil circuit control 3a selectively be communicated with or disconnect with pressure oil-source P.therefore, in the situation that main reversing valve 2 stops the second working oil path B fuel feeding, the jib hydraulic system that the utility model provides can be by the switching of reversal valve 4, making pressure oil-source P is separately the first oil circuit control 3a fuel feeding, this moment is due to the existence of one way valve 5, the pressure oil that is supplied in the first oil circuit control 3a by pressure oil-source P can not enter in the second working oil path B, thereby can reopen the first equalizing valve 3, at this moment, can be under the Action of Gravity Field of jib, make the rodless cavity of arm support oil cylinder 1 continue appropriate oil return, support and make jib stably be retracted in jib.
In order to complete simultaneously above-mentioned two kinds of duties, preferably, the reversal valve 4 that the utility model provides is three position directional valve, is more preferably the 3-position 4-way solenoid operated directional valve.This three position directional valve connects respectively fuel tank T and pressure oil-source P, and an actuator port of this three-position valve is communicated with the first oil circuit control 3a, and at this moment, another actuator port cut-off gets final product.Wherein, can make the first oil circuit control 3a be communicated with fuel tank T when reversal valve 4 switches to left position, can make the first oil circuit control 3a be communicated with pressure oil-source P when switching to right position, thereby can solve simultaneously above-mentioned two problems.Certainly; also two bi-bit bi-pass reversal valves 4 can be set separately; and the connected sum of controlling respectively the first oil circuit control 3a and pressure oil-source P and fuel tank disconnects, and should fall into protection domain of the present utility model equally for the kind of this reversal valve 4 and the distortion of set-up mode.In addition, why preferred reversal valve 4 is for electromagnetism changes the shape valve, is to be controlled by controller 8 for convenient.The boom system and the control method that provide below in conjunction with the utility model are described in detail.
The boom system that the utility model provides comprises that jib supports, can be retracted in the jib in this jib support and the jib hydraulic system of controlling this jib, and wherein, this boom system also comprises controller 8 and the checkout gear of mutual electrical connection.Wherein, for the convenient hydraulic system of using the utility model to provide solves in the jib removal process, jib is to the problem of the impact of jib support and the problem that upwarps of the complete rear jib of recovery, the jib hydraulic system that provides based on the utility model, the control method that the utility model provides comprises detecting step and the first control step, in detecting step, whether detect jib supports near jib, and in first controls step, when jib supports near jib, control the first oil circuit control 3a by reversal valve 4 and be communicated with fuel tank T.
In control method of the present utility model, detection mode and control mode have multiple, wherein preferably, above-mentioned checkout gear can comprise the approach switch that is arranged between jib and jib support, whether namely detect jib by approach switch supports near jib,, trigger this approach switch, thereby make controller 8 be fed back and control reversal valve 4 during with the position of approach switch when the whereabouts of jib.In addition, can also adopt the checkout gear such as range sensor to detect jib and the jib distance value between supporting, when this distance value is equal to or less than the threshold value that is arranged in controller 8, controller 8 can be by controlling reversal valve 4, controlling the first oil circuit control 3a selectively is communicated with or disconnects with fuel tank T, the deceleration of reclaiming to complete jib, thus the impact that jib is supported alleviated.
Upwarp problem for fear of the jib that reclaims after completing at jib equally, the control method that the utility model provides comprises that also second controls step, namely when upwarping appears in jib, controls the first oil circuit control 3a by reversal valve 4 and is communicated with pressure oil-source P.Thereby make the rodless cavity 11 of arm support oil cylinder 1 continue oil return, support so that jib stably is recovered to jib.Wherein, because upwarping comparatively easily, jib finds, and less demanding to the promptness of controlling that then the mode that therefore can adopt operating personnel to estimate realizes being communicated with of the first oil circuit control 3a and pressure oil-source P by manual control reversal valve 4.
In addition, also can adopt similar and the first automatic control mode by controller 8 of controlling in step, that is, can be by controller 8 automatically by reversal valve 4, control the first oil circuit control 3a selectively is communicated with or disconnects with pressure oil-source P.Whether namely need checkout gear that the utility model provides can also detect described jib upwarps, for example can detect by angular transducer is set the angle of jib and horizontal plane, or the retraction stroke that displacement transducer detects arm support oil cylinder 1 is set whether puts in place to realize.For the various modes that can realize control method of the present utility model, all should fall as in protection domain of the present utility model.
To sum up, the jib that the jib hydraulic system that the utility model provides and control method thereof can solve in boom system supports the problem of impacting to jib in removal process, can also solve the problem that jib upwarps after recovery is completed, the concrete pumping equipment practicality such as concrete mixer that make the utility model provide are stronger.
Below describe by reference to the accompanying drawings preferred embodiment of the present utility model in detail; but; the utility model is not limited to the detail in above-mentioned embodiment; in technical conceive scope of the present utility model; can carry out multiple simple variant to the technical solution of the utility model, these simple variant all belong to protection domain of the present utility model.
Need to prove in addition, each concrete technical characterictic described in the above-mentioned specific embodiment in reconcilable situation, can make up by any suitable mode, for fear of unnecessary repetition, the utility model is to the explanation no longer separately of various possible combinations.
In addition, also can carry out any combination between various embodiment of the present utility model, as long as it is without prejudice to thought of the present utility model, it should be considered as content disclosed in the utility model equally.
Claims (8)
1. jib hydraulic system, comprise arm support oil cylinder (1) and main reversing valve (2), described main reversing valve (2) is communicated with rodless cavity (11) and the rod chamber (12) of described arm support oil cylinder (1) by the first working oil path (A) and the second working oil path (B) respectively, be provided with the first equalizing valve (3) on wherein said the first working oil path (A), first oil circuit control (3a) of this first equalizing valve (3) is communicated with described the second working oil path (B), it is characterized in that, the upper other reversal valve (4) that is connected to of described the first oil circuit control (3a), and be provided with on described the first oil circuit control (3a) and allow fluid to flow to the one way valve (5) of described the first equalizing valve (3) from described the second working oil path (B), the other reverse hydraulic fluid port side that is connected on described one way valve (5) of described reversal valve (4), and described reversal valve (4) can also make described the first oil circuit control (3a) selectively be communicated with or disconnect with pressure oil-source (P).
2. jib hydraulic system according to claim 1, it is characterized in that, described the first equalizing valve (3) comprises the first one way valve (31) and the first external control sequence valve (32) that is connected in parallel, described the first one way valve (31) allows the fluid of described main reversing valve (2) to flow to described rodless cavity (11), and the switching of described the first external control sequence valve (32) is controlled by described the first oil circuit control (3a).
3. jib hydraulic system according to claim 1, it is characterized in that, be provided with the second equalizing valve (7) on described the second working oil path (B), second oil circuit control (7a) of described the second equalizing valve (7) is communicated with described the first working oil path (A), wherein, described the second equalizing valve (7) comprises the second one way valve (71) and the second external control sequence valve (72) that is connected in parallel, described the second one way valve (71) allows the fluid of described main reversing valve (2) to flow to described rod chamber (12), and the switching of described the second external control sequence valve (72) is controlled by described the second oil circuit control (7a).
4. jib hydraulic system according to claim 1, it is characterized in that, described reversal valve (4) is three position directional valve, this three position directional valve connects respectively described fuel tank (T) and described pressure oil-source (P), and an actuator port of this three-position valve is communicated with described the first oil circuit control (3a).
5. boom system, comprise that jib supports, can be retracted in the jib in this jib support and the jib hydraulic system of controlling this jib, it is characterized in that, described hydraulic system is the described jib hydraulic system of any one according to claim 1-4, and described boom system also comprises controller (8) and the checkout gear of mutual electrical connection, whether described checkout gear can detect described jib and upwarp, described controller (8) can pass through described reversal valve (4), controlling described the first oil circuit control (3a) selectively is communicated with or disconnects with pressure oil-source (P).
6. boom system according to claim 5, it is characterized in that, described checkout gear is the angular transducer for detection of the angle between described jib and horizontal plane, or the displacement transducer that whether puts in place for detection of the retraction stroke of described arm support oil cylinder (1).
7. a concrete pumping equipment, comprise boom system, it is characterized in that, described boom system is according to claim 5 or 6 described boom systems.
8. concrete pumping equipment according to claim 1, is characterized in that, described concrete pumping equipment is concrete mixer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220664094 CN202937013U (en) | 2012-12-05 | 2012-12-05 | Boom hydraulic system, boom system and concrete pumping equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220664094 CN202937013U (en) | 2012-12-05 | 2012-12-05 | Boom hydraulic system, boom system and concrete pumping equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202937013U true CN202937013U (en) | 2013-05-15 |
Family
ID=48321258
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220664094 Expired - Lifetime CN202937013U (en) | 2012-12-05 | 2012-12-05 | Boom hydraulic system, boom system and concrete pumping equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202937013U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104692266A (en) * | 2015-02-05 | 2015-06-10 | 三一汽车起重机械有限公司 | Hydraulic system for telescopic buffer of crane boom and crane |
| CN105805096A (en) * | 2016-06-08 | 2016-07-27 | 安徽海龙建筑工业有限公司 | Overturning closed loop synchronous hydraulic system for erecting machine |
| CN105822615A (en) * | 2016-04-29 | 2016-08-03 | 泰富重工制造有限公司 | Hydraulic control system of engineering machinery amplitude change mechanism |
-
2012
- 2012-12-05 CN CN 201220664094 patent/CN202937013U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104692266A (en) * | 2015-02-05 | 2015-06-10 | 三一汽车起重机械有限公司 | Hydraulic system for telescopic buffer of crane boom and crane |
| CN104692266B (en) * | 2015-02-05 | 2017-03-22 | 三一汽车起重机械有限公司 | Hydraulic system for telescopic buffer of crane boom and crane |
| CN105822615A (en) * | 2016-04-29 | 2016-08-03 | 泰富重工制造有限公司 | Hydraulic control system of engineering machinery amplitude change mechanism |
| CN105822615B (en) * | 2016-04-29 | 2017-10-03 | 泰富重工制造有限公司 | The hydraulic control system of engineering machinery jib lubbing mechanism |
| CN105805096A (en) * | 2016-06-08 | 2016-07-27 | 安徽海龙建筑工业有限公司 | Overturning closed loop synchronous hydraulic system for erecting machine |
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