CN102094782B - Concrete pumping equipment and hydraulic system thereof - Google Patents
Concrete pumping equipment and hydraulic system thereof Download PDFInfo
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- CN102094782B CN102094782B CN 201110053116 CN201110053116A CN102094782B CN 102094782 B CN102094782 B CN 102094782B CN 201110053116 CN201110053116 CN 201110053116 CN 201110053116 A CN201110053116 A CN 201110053116A CN 102094782 B CN102094782 B CN 102094782B
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Abstract
The invention discloses a concrete pumping hydraulic system, which comprises an oscillating pump (2), a distribution valve, a stirring pump (1) and a stirring valve. The concrete pumping hydraulic system is characterized by also comprising a reversing valve (3), wherein when the reversing valve (3) is at a first working position, the oil outlet of the stirring pump (1) is communicated with the oil inlet of the stirring valve; and when the reversing valve (3) is at a second working position, the oil outlet of the stirring pump (1) is communicated with the oil inlet of the distribution valve. In the concrete pumping hydraulic system, when the oscillating pump fails, the stirring pump can timely replace the oscillating pump to provide pressure oil for the distribution valve, so that an external oil source is not needed, the operation of the distribution valve is maintained, the pumping system can continuously pump concrete to the outside, and the loss is reduced.
Description
Technical field
The present invention relates to the concrete pumping technique field, particularly a kind of concrete pumping hydraulic system.The invention still further relates to a kind of concrete pumping equipment that comprises above-mentioned concrete pumping hydraulic system.
Background technique
Concrete pumping equipment mainly is comprised of pumping system, hopper, hydraulic system, electrical system etc.Comprise mainly in the pumping system that two master cylinders and two concrete cylinders form, concrete piston in two concrete cylinders is connected with piston rod in two master cylinders respectively, the main oil cylinder piston bar is done the to-and-fro motion of opposite direction, and then the concrete piston is also done the to-and-fro motion of opposite direction under the piston rod induced effect; Because the outlet of concrete cylinder is communicated with hopper, deposits concrete in the hopper, during the concrete piston-retraction, the concrete cylinder cylinder barrel when concrete piston stretches out, pumps the concrete in the cylinder barrel from hopper inspiration concrete, therefore, a concrete cylinder sucks concrete, and another concrete cylinder pumps concrete; In order to realize the outside pumping of concrete, also distributing valve need be set, one termination discharge port of distributing valve, concrete concrete cylinder is outwards pumped in the other end connection, therefore, distributing valve need to be connected with the swing hydraulic system, swings the swing of HYDRAULIC CONTROL SYSTEM distributing valve, make distributing valve all the time with outwards pump concrete concrete cylinder and be communicated with, thereby realize concrete uninterrupted pumping.Therefore, only have distributing valve to swing in order switching, can realize the normal operation of pumping mechanism, realize that pumping mechanism is to the distribution of concrete suction and discharge.
In addition, concrete pumping mechanism also need configure the stirring hydraulic system, drives stirring mechanism the concrete that leaves in the hopper is stirred, and is mobile preferably with concrete in the maintenance hopper, thereby help pumping mechanism to concrete suction and discharge, preventing that the concrete long time stagnates solidifies.
Please refer to Fig. 1, Fig. 1 is a kind of typical concrete pumping hydraulic system schematic diagram.
At present, for stirring hydraulic system and swing hydraulic system, the main double loop hydraulic system that adopts in the prior art namely swings hydraulic system and hydraulic system of pump respectively by different special oil oil pump feeds, mixing pump 10 as shown in Figure 1 and semirotary pump 20.Owing to needing the uninterrupted pumping concrete, the swing of distributing valve must be finished within the extremely short time, this job specification has determined that the pressure versus flow that swings hydraulic system changes greatly, and the fluctuation of larger hydraulic shock and flow can produce adverse influence to oscillating oil pump.Therefore, in actual use, the rate of fault of semirotary pump 20 is relatively high, be mainly manifested in the middle of the site operation, swing hydraulic system suddenly without pressure or underpressure, cause pumpdown to carry out, replace without spare part usually the job site, it is the Portable belt spare part, the difficulty of replacing is also larger, and the replacement time is longer, and concrete can be set in concrete cylinder, in hopper and the delivery line, cause the loss of equipment component and manpower, in addition, because concrete construction has particularity, be generally continuous placing, and the work surface that participates in construction is larger, and the paralysis of concrete pumping mechanism can cause more serious loss.
Therefore, how keeping the continuity that swings hydraulic work system in the concrete pumping hydraulic system is those skilled in the art's technical issues that need to address.
Summary of the invention
The purpose of this invention is to provide a kind of concrete pumping hydraulic system, this hydraulic system can continue as distributing valve by mixing pump power is provided when semirotary pump break down, and realizes emergent fuel feeding, keeps the continuity of pumpdown.Another object of the present invention provides a kind of concrete pumping equipment that comprises above-mentioned concrete pumping hydraulic system.
For solving the problems of the technologies described above, the invention provides a kind of concrete pumping hydraulic system, comprise semirotary pump, distributing valve, mixing pump and stir valve, also comprise selector valve, when described selector valve was in the first working position, the oil outlet of described mixing pump was communicated with the filler opening of described stirring valve; When described selector valve was in the second working position, the oil outlet of described mixing pump was communicated with the filler opening of described distributing valve.
Preferably, also comprise accumulator, described accumulator is communicated with the filler opening of described distributing valve, and described selector valve is when being in the second working position, and described accumulator is communicated with the oil outlet of described mixing pump.
Preferably, described selector valve to the path of described accumulator is provided with the first one-way valve.
Preferably, described selector valve is two-position four way change valve, and when described selector valve was in the first working position, the filler opening of described distributing valve was communicated with fuel tank, and when described selector valve was in the second working position, the filler opening of described stirring valve was communicated with described fuel tank; And described selector valve to the path of described fuel tank is provided with throttle valve.
Preferably, described semirotary pump to the path of described distributing valve is provided with the second one-way valve.
Preferably, described distributing valve is S pendulum valve.
Preferably, described selector valve is solenoid directional control valve.
When selector valve was in the first working position in this concrete pumping hydraulic system, the oil outlet of mixing pump was communicated with the filler opening that stirs valve; When selector valve was in the second working position, the oil outlet of mixing pump was communicated with the filler opening of distributing valve.During normal working, make selector valve be in the first working position, namely mixing pump provides pressure oil for stirring valve specially, and distributing valve then provides pressure oil by semirotary pump; When semirotary pump breaks down, make selector valve be in the second working position, then mixing pump can provide power for distributing valve, makes distributing valve continue to switch between the outlet of two concrete cylinders, realizes concrete uninterrupted pumping.Because concrete also needs to stir, can adjust off and on the working position of selector valve, namely mixing pump is during semirotary pump breaks down, and mixing pump provides a period of time pressure oil for distributing valve, transfer to again for the stirring valve provides pressure oil, can determine interlude according to actual conditions.This concrete pumping hydraulic system then, when semirotary pump produced fault, mixing pump can substitute in time semirotary pump and provide pressure oil for distributing valve, need not external oil sources, keep the work of distributing valve, make pumping system can continue outside pump concrete, reduce the loss.
For reaching another object of the present invention, the present invention also provides a kind of concrete pumping equipment, comprise concrete pumping hydraulic system, motor and electric control system, described concrete pumping hydraulic system is above-mentioned each described concrete pumping hydraulic system.
Preferably, described electric control system comprises control unit; When receiving trouble signal, the described selector valve of described control unit output control carries out the periodically signal of switching between the first working position and the second working position.
Preferably, when receiving trouble signal, described control unit at first detects the idle signal that whether receives described motor, if receive idle signal, the described selector valve of output control is in the signal of the first working position; If do not receive idle signal, the described selector valve of described control unit output control carries out the periodically signal of switching between the first working position and the second working position.
Because above-mentioned concrete pumping hydraulic system has above-mentioned technique effect, the concrete pumping equipment with this concrete pumping hydraulic system also should have constructed effect, is not repeated herein.
Description of drawings
Fig. 1 is a kind of typical concrete pumping hydraulic system schematic diagram;
Fig. 2 is the schematic diagram of a kind of embodiment of concrete pumping hydraulic system provided by the present invention;
Fig. 3 is the control flow chart of control unit in a kind of embodiment of concrete pumping equipment provided by the present invention.
Embodiment
Core of the present invention is for providing a kind of concrete pumping hydraulic system, and this hydraulic system can continue as distributing valve by mixing pump power is provided when semirotary pump break down, and realizes emergent fuel feeding, keeps the continuity of pumpdown.Another core of the present invention provides a kind of concrete pumping equipment that comprises above-mentioned concrete pumping hydraulic system.
In order to make those skilled in the art understand better technological scheme of the present invention, the present invention is described in further detail below in conjunction with the drawings and specific embodiments.
Please refer to Fig. 2, Fig. 2 is the schematic diagram of a kind of embodiment of concrete pumping hydraulic system provided by the present invention.
Concrete pumping hydraulic system provided by the present invention, comprise semirotary pump 2, distributing valve, mixing pump 1 and stir valve, semirotary pump 2 provides pressure oil for distributing valve, under the pressure oil effect, the distributing valve switching is communicated with two concrete cylinders, two concrete cylinders are in respectively discharges and sucks two kinds of working staties of concrete, and distributing valve is communicated with the concrete concrete cylinder of discharge all the time, thereby realizes concrete uninterrupted pumping.
The type of distributing valve has multiple, can be S shape pendulum valve, vertical shaft fly valve, raw oblique sluice valve, C shape valve etc., because S shape pendulum valve itself belongs to the part of pumping pipe, can bear larger pumped concrete earth pressure, have the far away and large characteristics of delivery head of fed distance, can preferably adopt according to actual conditions.Because concrete easily solidifies, mixing pump 1 provides pressure oil for stirring valve, thereby drive the concrete in the stirring mechanism stirring hopper, prevent concrete setting, improve concrete flowability, help concrete cylinder to concrete suction and discharge, improve the inhalation rate of concrete cylinder, avoid the abnormalities such as stifled cylinder.
This concrete pumping hydraulic system also comprises selector valve 3, and selector valve 3 has two working positions at least, and when selector valve 3 was in the first working position, the oil outlet of mixing pump 1 was communicated with the filler opening that stirs valve; When selector valve 3 was in the second working position, the oil outlet of mixing pump 1 was communicated with the filler opening of distributing valve.
During normal working, selector valve 3 is in the first working position, and namely mixing pump 1 provides pressure oil for stirring valve specially, and distributing valve then provides pressure oil by semirotary pump 2; When semirotary pump 2 breaks down, be that semirotary pump 2 no longer provides pressure oil, when the pressure oil that perhaps provides is short of power, 3 commutations of control selector valve, make selector valve 3 be in the second working position, then mixing pump 1 can make distributing valve continue to switch between the outlet of two concrete cylinders for distributing valve provides power, realizes concrete uninterrupted pumping.Certainly, because concrete also needs to stir, can adjust off and on the working position of selector valve 3, be that mixing pump 1 is during semirotary pump 2 breaks down, mixing pump 1 provides a period of time pressure oil for distributing valve, transfer to again for stirring valve pressure oil is provided, then selector valve 3 certain interval of times namely switch once, interlude is respectively the operating time of stirring valve and distributing valve, can determine interlude according to actual conditions, such as, determine according to factors such as the speed requirement of pump concrete, concrete flowability energy.Selector valve 3 preferably adopts solenoid directional control valve, and as shown in Figure 2, solenoid directional control valve is in to get electricity condition, be positioned at i.e. the second working position, left position, mixing pump 1 is communicated with distributing valve, during the solenoid directional control valve outage, be positioned at i.e. the first working position, right position, mixing pump 1 is communicated with the stirring valve.Solenoid directional control valve is convenient to electrical system control, and especially the selector valve in this programme 3 needs constantly to carry out the commutation action, by the control unit of electrical system according to the program control selector valve 3 of setting electric and dead electricity, thereby relatively easily realize purpose of the present invention.
This concrete pumping hydraulic system when semirotary pump 2 produces fault, can make mixing pump 1 substitute in time semirotary pump 2 for distributing valve provides pressure oil, keeps the work of distributing valve, makes pumping system can continue outside pump concrete, the generation of reducing the loss.Then in fact this invention provides a kind of emergent distributing valve oscillation system oil sources, has utilized the pumping system own resources, need not external oil sources, and the response time is fast, and cost is lower.
Please refer to Fig. 3, Fig. 3 is the control flow chart of control unit in a kind of embodiment of concrete pumping equipment provided by the present invention.
Except above-mentioned concrete pumping hydraulic system, the present invention also provides a kind of concrete pumping equipment, comprise concrete pumping hydraulic system, motor and electric control system, the described concrete pumping hydraulic system of the above-mentioned arbitrary embodiment of concrete pumping hydraulic system.Because above-mentioned concrete pumping hydraulic system has above-mentioned technique effect, the concrete pumping equipment with above-mentioned concrete pumping hydraulic system also should have identical technique effect, is not repeated herein.
The electric control system of concrete pumping equipment can comprise the control unit of control selector valve 3 commutations, control unit can be solidificated in the control system of car load, selector valve 3 namely is communicated with in order to control mixing pump 1 oil outlet with distributing valve or to stir the valve filler opening, and the signal output part of control unit is connected with the signal input part of selector valve 3.When semirotary pump 2 is in fault state, system pressure is not enough to for distributing valve work, then concrete suction and discharge can't normally be carried out, operator can find this fault (in theory in real time, whether control unit can Real-Time Monitoring semirotary pump 2 breaks down), and the instruction of sending trouble signal to control unit, after the input end of control unit receives trouble signal, enter predefined fault mode, under this pattern, control unit is sent to the control command of fault pumping state action the signal input part of selector valve 3, i.e. output control selector valve 3 carries out the periodically signal of switching between the first working position and the second working position, when selector valve 3 is solenoid directional control valve, then controls selector valve 3 and periodically get electric and dead electricity.As shown in Figure 2, getting the electric time is the time of distributing valve work, the time of dead electricity is namely stirred the time of valve work, those skilled in the art can be according to the actual conditions needs, in the control program of control unit, set dead electricity and get electric blanking time, then 3 commutation cycles of selector valve be once electric and dead electricity time and, in one-period, pumping equipment is finished a pumping and is once stirred, and rationally sets the dead electricity time and must the electric time can make pumping efficiency and keep two indexs of concrete flowability all to be met.
Control unit automatically reasonable distribution mixing pump 1 is respectively distributing valve or stirs the supply time of valve, can realize the normal switching of distributing valve, can carry out the intermittence stirring to the concrete that leaves in the hopper again, prevent concrete setting or poor fluidity, cause the phenomenon that the pumping inhalation rate is low or hopper gathers materials, realize intelligent control.
When normal operation, obviously, the selector valve 3 shown in Fig. 2 is in power failure state always; Semirotary pump 2 breaks down, after entering the fail operation pattern, the input end of control unit also receives the idle signal of motor, the motive motor that being concrete pumping provides is in idling conditions, master cylinder and concrete cylinder stop pump action, then distributing valve does not need work, therefore, after control system was sent to control unit with the engine idle signal, control unit control selector valve 3 was in the first working position, when selector valve 3 is solenoid directional control valve, then control selector valve 3 and be in the power failure state of right position shown in Fig. 2, make mixing pump 1 in the idling process all the time fuel feeding carry out agitating function, and no longer switch to the distributing valve fuel feeding to stirring valve; Control unit is not received when motor is in the idling mode signal, then periodically controls selector valve 3 and switches.This kind setting can make the power distribution of mixing pump 1 more reasonable, increases work efficiency.
Above a kind of concrete pumping equipment provided by the present invention and hydraulic system thereof are described in detail.Used specific case herein principle of the present invention and mode of execution are set forth, above embodiment's explanation just is used for helping to understand method of the present invention and core concept thereof.Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of claim of the present invention.
Claims (10)
1. concrete pumping hydraulic system, comprise semirotary pump (2), distributing valve, mixing pump (1) and stir valve, it is characterized in that, also comprise selector valve (3), described selector valve (3) is when being in the first working position, and the oil outlet of described mixing pump (1) is communicated with the filler opening of described stirring valve; Described selector valve (3) is when being in the second working position, and the oil outlet of described mixing pump (1) is communicated with the filler opening of described distributing valve.
2. concrete pumping hydraulic system according to claim 1, it is characterized in that, also comprise accumulator (4), described accumulator (4) is communicated with the filler opening of described distributing valve, and described selector valve (3) is when being in the second working position, and described accumulator (4) is communicated with the oil outlet of described mixing pump (1).
3. concrete pumping hydraulic system according to claim 2 is characterized in that, described selector valve (3) to the path of described accumulator (4) is provided with the first one-way valve (5).
4. concrete pumping hydraulic system according to claim 3, it is characterized in that, described selector valve (3) is two-position four way change valve, described selector valve (3) is when being in the first working position, the filler opening of described distributing valve is communicated with fuel tank, described selector valve (3) is when being in the second working position, and the filler opening of described stirring valve is communicated with described fuel tank; And described selector valve (3) to the path of described fuel tank is provided with throttle valve (6).
5. concrete pumping hydraulic system according to claim 4 is characterized in that, described semirotary pump (2) to the path of described distributing valve is provided with the second one-way valve (7).
6. concrete pumping hydraulic system according to claim 5 is characterized in that, described distributing valve is S pendulum valve.
7. according to claim 1 to 6 each described concrete pumping hydraulic systems, it is characterized in that, described selector valve (3) is solenoid directional control valve.
8. a concrete pumping equipment comprises concrete pumping hydraulic system, motor and electric control system, it is characterized in that, described concrete pumping hydraulic system is each described concrete pumping hydraulic system of claim 1 to 7.
9. concrete pumping equipment according to claim 8 is characterized in that, described electric control system comprises control unit; When receiving trouble signal, the described selector valve of described control unit output control carries out the periodically signal of switching between the first working position and the second working position.
10. concrete pumping equipment according to claim 9, it is characterized in that, when receiving trouble signal, described control unit at first detects the idle signal that whether receives described motor, if receive idle signal, the described selector valve of output control is in the signal of the first working position; If do not receive idle signal, the described selector valve of described control unit output control carries out the periodically signal of switching between the first working position and the second working position.
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| CN 201110053116 CN102094782B (en) | 2011-03-04 | 2011-03-04 | Concrete pumping equipment and hydraulic system thereof |
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| CN 201110053116 CN102094782B (en) | 2011-03-04 | 2011-03-04 | Concrete pumping equipment and hydraulic system thereof |
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| CN102094782B true CN102094782B (en) | 2013-02-27 |
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| WO2013033884A1 (en) * | 2011-09-05 | 2013-03-14 | 长沙中联重工科技发展股份有限公司 | Concrete pumping equipment and hydraulic system thereof |
| CN102926539B (en) * | 2012-11-06 | 2016-04-06 | 三一重工股份有限公司 | Pumping machine and emergency driving system thereof |
| JP6599410B2 (en) * | 2017-08-10 | 2019-10-30 | 本田技研工業株式会社 | Hydraulic control device |
| CN107878408A (en) * | 2017-11-28 | 2018-04-06 | 镇江市高等专科学校 | A kind of bath of glass water tank anti-freezing device |
| CN110725821B (en) * | 2019-09-25 | 2020-11-06 | 中联重科股份有限公司 | Distribution hydraulic system and concrete distribution equipment |
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| SU1315651A1 (en) * | 1985-11-12 | 1987-06-07 | Научно-исследовательский институт строительства угольных и горнорудных предприятий "Кузниишахтострой" | Concrete pump hydraulic drive |
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| CN201953600U (en) * | 2011-03-04 | 2011-08-31 | 徐工集团工程机械股份有限公司建设机械分公司 | Concrete pumping equipment and hydraulic system thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3427329B2 (en) * | 1994-09-21 | 2003-07-14 | 石川島建機株式会社 | Hydraulic circuit of swing valve type concrete pump |
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| SU1315651A1 (en) * | 1985-11-12 | 1987-06-07 | Научно-исследовательский институт строительства угольных и горнорудных предприятий "Кузниишахтострой" | Concrete pump hydraulic drive |
| CN2713194Y (en) * | 2004-04-21 | 2005-07-27 | 郑州多元重工科技有限公司 | Hydraulic system for concrete pump |
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Non-Patent Citations (1)
| Title |
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| JP特开平8-93636A 1996.04.09 |
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Application publication date: 20110615 Assignee: XCMG Schwing Machinery Co., Ltd. Assignor: Building Machinery Co., Ltd., XCMG Construction Machinery Co., Ltd. Contract record no.: 2013320000351 Denomination of invention: Concrete pumping equipment and hydraulic system thereof Granted publication date: 20130227 License type: Exclusive License Record date: 20130418 |
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Owner name: XUZHOU XUGONG SCHWING MACHINERY CO., LTD. Free format text: FORMER OWNER: BUILDING MACHINERY CO., LTD., XCMG CONSTRUCTION MACHINERY CO., LTD. Effective date: 20131111 |
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Effective date of registration: 20131111 Address after: 221004 Xuzhou economic and Technological Development Zone, Jiangsu Peach Road, No. 29 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. |