WO2012088826A1 - 控制混凝土泵在停机后再次泵送和反泵的方法 - Google Patents

控制混凝土泵在停机后再次泵送和反泵的方法 Download PDF

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Publication number
WO2012088826A1
WO2012088826A1 PCT/CN2011/074605 CN2011074605W WO2012088826A1 WO 2012088826 A1 WO2012088826 A1 WO 2012088826A1 CN 2011074605 W CN2011074605 W CN 2011074605W WO 2012088826 A1 WO2012088826 A1 WO 2012088826A1
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WO
WIPO (PCT)
Prior art keywords
concrete
pump
hopper
distribution valve
shaped distribution
Prior art date
Application number
PCT/CN2011/074605
Other languages
English (en)
French (fr)
Inventor
高荣芝
王佳茜
Original Assignee
长沙中联重工科技发展股份有限公司
湖南中联重科专用车有限责任公司
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 长沙中联重工科技发展股份有限公司, 湖南中联重科专用车有限责任公司 filed Critical 长沙中联重工科技发展股份有限公司
Priority to EP11853565.7A priority Critical patent/EP2660468A1/en
Priority to BR112013016902A priority patent/BR112013016902A2/pt
Priority to RU2013131753/06A priority patent/RU2564738C2/ru
Publication of WO2012088826A1 publication Critical patent/WO2012088826A1/zh

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D7/00Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04D7/02Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
    • F04D7/04Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B15/00Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04B15/02Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being viscous or non-homogeneous
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B15/00Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04B15/02Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being viscous or non-homogeneous
    • F04B15/023Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being viscous or non-homogeneous supply of fluid to the pump by gravity through a hopper, e.g. without intake valve
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B7/00Piston machines or pumps characterised by having positively-driven valving
    • F04B7/0038Piston machines or pumps characterised by having positively-driven valving the distribution member forming a single inlet for a plurality of pumping chambers or a multiple discharge for one single pumping chamber
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/18Rotors
    • F04D29/22Rotors specially for centrifugal pumps
    • F04D29/2261Rotors specially for centrifugal pumps with special measures
    • F04D29/2283Rotors specially for centrifugal pumps with special measures for reverse pumping action

Definitions

  • the present invention relates to the field of concrete pumps, and more particularly to a method for controlling a concrete pump to be pumped again after shutdown and a method for controlling a concrete pump after shutdown Counter pump method. BACKGROUND OF THE INVENTION As shown in FIGS.
  • a concrete pump includes a delivery pipe A for conveying concrete to a destination and a main body portion B of a concrete pump, wherein the main body portion B of the concrete pump includes a hopper 18 and a pair of ⁇ rainbow (first Red 20 and second red 21), a pair of main oil red (first main oil red 13 and second main oil red 14), S-shaped distribution valve 17 and a pair of oscillating cylinders (first oscillating oil rainbow 11 and second Swing oil rainbow 12) and so on.
  • is used to pump the mixed soil from the hopper to the conveying pipe, and is driven by the alternately moving main oil rainbow;
  • the S-shaped distribution valve 17 is located in the hopper 18 and is connected with the conveying pipe, and the S-shaped distribution valve 17 is alternately Connect with one of the ⁇ rainbows to distribute the concrete, at which point another sump draws concrete from the hopper.
  • the alternating oscillation of the S-shaped dispensing valve is achieved by one or more actuators (swing cylinders).
  • the concrete pump also includes an accumulator and a constant pressure pump. The accumulator provides a pressure shock that allows the S-distribution valve to achieve sufficient acceleration and speed when oscillating to ensure coordination of the pumping action and distribution piping and sufficient flow.
  • the actuator is mainly used to drive the gravity of the S-shaped distribution valve, the friction between the S-shaped distribution valve and other mechanical parts, the cutting force of the concrete column in the S-shaped distribution valve, and the resistance of the concrete in the hopper 18.
  • the constant pressure pump is used to supply pressurized oil to the accumulator.
  • the upper limit of the accumulator pressure is determined by the constant pressure pump.
  • the concrete pump has two states, pumping work, that is, the concrete pump is sent to the destination to realize the cloth operation; the back pump work, the concrete in the concrete conveying pipe is recycled to In the hopper, at this time, it is mostly the end of the work or when the concrete material is blocked in the conveying pipe.
  • the swinging oil rainbow will drive the S-shaped distribution valve to switch on the second red 21 of the second main oil red 14 side, at this time, the second The main oil red 14 pushes the concrete in the second red 21 into the S-shaped distribution valve, and the first main oil rainbow 13 draws the concrete in the hopper 18 into the first cylinder 20; until the two master cylinders move to the predetermined position again, the system All of the above logic will be repeated.
  • the concrete pump realizes the continuous delivery of the concrete in the hopper 18 to the S-shaped distribution valve and the destination of the delivery through the delivery pipe (shown in Figure 1).
  • Counter pump operation logic of concrete pump When the first main oil rainbow 13 is propelled under the control of the power source and the control system, the swing cylinder will drive the S-shaped distribution valve 17 to connect the second main oil red 14 side of the concrete second red 21 At this time, the first main oil red 13 pushes the concrete in the first cylinder 20 into the hopper 18, and the second main cylinder 14 draws the concrete in the S-shaped distribution valve into the second cylinder 21; when the two main cylinders move to When the position is predetermined, the following conversion will be performed. When the second master cylinder 14 is propelled under the control of the power source and the control system, the swing cylinder will drive the S-shaped distribution valve 17 to switch on the first red 20 on the first main oil red 13 side.
  • the pumping mechanism realizes that the concrete in the conveying pipe is continuously sucked into the S-shaped distribution valve, and then sucked into the hopper 18 via the S-shaped distribution valve.
  • FIG. 3 shows a hydraulic control circuit for realizing the above logic, wherein the electromagnetic reversing valve 1 and the small hydraulic reversing valve 2 are used to drive the reversing of the large hydraulic reversing valve 3, and the large hydraulic reversing valve 3 is used for driving.
  • Main oil red reversing Similarly, the electromagnetic reversing valve 8 and the small hydraulic reversing valve 9 are used to drive the large hydraulic reversing valve 10 to commutate, and the large hydraulic reversing valve 10 is used to drive the swinging oil red reversing, wherein the main The oil red includes a first main oil red 13 and a second main oil red 14, and the oscillating oil red includes a first oscillating oil red 11 and a second oscillating oil red 12.
  • the first oil pump 4 is for driving the main oil cylinder
  • the second oil pump 5 is for driving the swing oil rainbow.
  • the second oil pump 5 supplies hydraulic oil to the accumulator 7, and the accumulator 7 drives the swing of the first oscillating oil rainbow 11 and the second oscillating oil rainbow 12 due to the use environment of the concrete pump, which must be certain after working for a period of time. After the pause of time, work again.
  • the cylinder and the swing cylinder will drive the actuator to do the following: If the pump is stopped, start pumping again: If the position of the reversing trigger signal is not reached, the pumping mechanism will maintain the original direction of motion for pumping, that is, if the first main oil rainbow 13 is in the propulsion state before the shutdown, the S-shaped distribution valve is connected to the first main cylinder. After the first ⁇ 20 on the side of the 13th, the first main sump 13 will continue to advance after the pumping is started, and the mixed soil in the first ⁇ Hong 20 continues to pass through the S-shaped distribution valve 4 to enter the conveying pipe.
  • the counter pump is turned on: If the reversing trigger signal position is not reached, the first main cylinder 13 and the second main cylinder 14 will maintain the original movement direction, and the S-shaped distribution valve will switch direction, that is, if the pump When the first main oil rainbow 13 is in the propulsion state, the S-shaped distribution valve is turned on the first cylinder 20 on the first main cylinder 13 side, and after the reverse pump is turned on, the first main cylinder 13 will continue to advance, and the S-shaped distribution valve Switching to the second ⁇ 21 on the second main oil rainbow 14 side, the second main oil red 14 will move in the opposite direction to the hopper 18, at which point the counter pump replenishment is achieved (the delivery tube is passed through the second main cylinder 14) And the concrete inhalation cylinder in the S-shaped distribution valve pushes the concrete in the first cylinder 20 into the hopper 18 through the first main oil rainbow 13).
  • the control method is easy to cause accelerated wear of the plugging pipe and the wearing parts.
  • pumping again after pumping shutdown As can be seen in Figure 1, there is still a large amount of concrete in the conveying pipe during pumping shutdown, and the concrete will gradually sink under gravity during the shutdown process, and The water will continue to be precipitated, and some of the water will continuously flow out of the pipe from the pipe joint. At this time, the concrete in the pipe will be in a bad condition. At this time, the pumping will immediately cause a large impact due to the increase in the resistance caused by the deterioration of the concrete. It will directly block the pipe (concrete blockage pipe).
  • the technical problem to be solved by the present invention is to provide a method for controlling the concrete pump to be pumped again after shutdown and a method for controlling the concrete pump to back again after stopping, which can optimize the concrete condition and reduce the pumping resistance. And the wear of the whole machine.
  • a method for controlling a concrete pump to be pumped again after a shutdown comprising: swinging a S-shaped distribution valve in a hopper to cause a first end of the S-shaped distribution valve to leave The ⁇ rainbow that was originally turned on, and the other ⁇ rainbow, is turned on, and then the direction of movement of the master cylinder is changed relative to before stopping to start conveying concrete into the duct through another cylinder. Further, before swinging the S-shaped distribution valve in the hopper, the method further comprises: keeping the S-shaped distribution valve stationary, changing the moving direction of the main oil red to back-pump the concrete from the conveying pipe.
  • the method further includes: determining the time when the concrete pump is stopped; if the time of stopping the concrete pump is greater than or equal to the predetermined value a, keeping the S-shaped distribution valve stationary, changing the main oil The direction of red movement is to draw concrete back from the duct.
  • the step of conveying the concrete comprises: a pumping step of pushing the concrete in the cylinder connected to the S-shaped distribution valve into the S-shaped distribution valve, and sucking the concrete in the hopper into the cylinder connected to the hopper;
  • the pumping step is suspended, and the swinging step is performed, and the S-shaped dispensing valve is swung, so that the first end of the S-shaped dispensing valve is changed to the closed cylinder; after the swinging step is performed, the pump is returned. Send the steps.
  • the step of back-pumping the concrete comprises: a reverse pumping step of sucking the concrete in the S-shaped distribution valve into the cylinder connected to the S-shaped distribution valve, and pushing the concrete in the cylinder connected to the hopper into the hopper . Further, when the movement of the piston rod of the main cylinder for conveying the concrete causes the position sensor provided on the main cylinder to be triggered, it is determined that the main cylinder is moved to the predetermined position. According to another aspect of the present invention, there is also provided a method of controlling a concrete pump to back pump after a shutdown, comprising: maintaining a S-shaped distribution valve in the hopper stationary, changing a direction of movement of the main oil rainbow to start from the delivery pipe Medium anti-pumping concrete.
  • the step of back-pumping the concrete from the conveying pipe comprises: a reverse pumping step of sucking the concrete in the S-shaped distribution valve into the cylinder connected to the S-shaped distribution valve, and simultaneously in the cylinder connected to the hopper Pushing the concrete into the hopper; when the main cylinder moves to the predetermined position, suspending the anti-pumping step and performing the swinging step, The S-shaped distribution valve is swung, and the first end of the S-shaped distribution valve is changed to the closed cylinder; after the swinging step green is performed, the reverse pump step is returned. Further, when the movement of the piston rod of the main cylinder for conveying the concrete causes the position sensor provided on the main cylinder to be triggered, it is determined that the main cylinder is moved to the predetermined position.
  • the invention has the following beneficial effects:
  • the swing of the S-shaped distribution valve agitates the concrete in the hopper and transports the concrete through another cylinder that originally suctioned the concrete;
  • the concrete is pumped through another boring cylinder that originally transported the concrete, so that the originally pressurized ⁇ rainbow becomes a suction action, the pressure is released, and the environment inside the boring cylinder is improved; due to the swing of the S-shaped distribution valve,
  • the thousand materials are recirculated under the action of gravity (because the suction efficiency is less than 1, the ⁇ rainbow is not full), which improves the condition of the cylinder and the S-shaped distribution valve that will transport the concrete.
  • Figure 1 is a schematic view of the overall structure of a concrete pump
  • Figure 2 is a schematic view of the concrete pump except for the delivery pipe
  • Figure 3 is a schematic diagram of a hydraulic control circuit of the concrete pump
  • Figure 4 shows a schematic diagram of a hydraulic control circuit according to the present invention
  • FIG. 5 is a flow chart showing a method of controlling a concrete pump to back-pump after a shutdown in accordance with a first embodiment of the present invention.
  • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments of the present invention are described in detail below with reference to the accompanying drawings. As shown in FIG.
  • Step S101 It is judged whether the time when the concrete pump is stopped is greater than a predetermined value a.
  • the predetermined value a depends on the specific conditions of the concrete pump, for example, 10 minutes. If the concrete pump is stopped for less than the predetermined value a, steps S102 and 103 are sequentially performed.
  • step S102 swinging the S-shaped distribution valve 17 in the hopper 18 to cause the first end of the S-shaped distribution valve 17 to leave the originally turned red and turn on the other red.
  • Step S103 changing the moving direction of the main oil red before stopping, to start conveying the mixed water through another red conveying pipe; After the material is left for too long, the concrete in the conveying pipe, the S-shaped distribution valve and the connected cylinder is compacted under the action of its own weight. Due to the sealing, the water in the material may deteriorate. The logic is improved to the S-shaped distribution valve. Pump to another rainbow. There are three advantages at this point: 1. The S-shaped distribution valve moves the material in the hopper, loosens the deteriorated concrete, and reduces the vibration and wear during the working process. 2. The original pressure-sensitive ⁇ rainbow becomes a suction, and the pressure is released, improving the internal environment of the material. 3.
  • step 4 S S 104 step 4 S S 105 and step 4 S S 106 are sequentially performed.
  • step S104 the S-shaped distribution valve 17 is kept stationary, and the moving direction of the main oil rainbow is changed to back-pump the concrete from the conveying pipe.
  • Step 4 gathers S 105 and swings the S-shaped dispensing valve 17 so that the first end of the S-shaped dispensing valve 17 leaves the previously turned red and turns on the other red.
  • Step S106 starting to convey concrete into the conveying pipe through another cylinder.
  • the method of first pumping back, swinging the S-shaped distribution valve, and then conveying the concrete firstly decompresses or moves the material in the manifold, the S-shaped distribution valve, the cylinder and the hopper, and then the S-shaped distribution valve will be used in the hopper.
  • the material is stirred again, loosening the deteriorated concrete, and reducing the vibration and wear during the working process.
  • the concrete condition in the system will be greatly optimized, which will reduce the pumping, swinging resistance and wear of the whole machine. This solution can solve the problem of poor condition in the main rainbow drive range.
  • the step of conveying the concrete into the conveying pipe comprises: a pumping step of pushing the concrete in the cylinder connected to the S-shaped distribution valve 17 into the S-shaped distribution valve 17
  • the concrete in the hopper 18 is sucked into the cylinder connected to the hopper 18; when the main oil rainbow moves to the predetermined position, the pumping step is suspended, and the swinging step is performed, and the S-shaped distribution valve 17 is swung to make the S-shaped distribution valve 17
  • the first end converts the closed cylinder; after the swing step is performed, the pumping step is returned, and the above control logic is repeated.
  • the step of back-pumping concrete from the conveying pipe comprises: a reverse pumping step of sucking the concrete in the S-shaped distribution valve 17 into the cylinder connected to the S-shaped distribution valve 17, and simultaneously The concrete in the crucible to which the hopper 18 is connected is pushed into the hopper 18.
  • a reverse pumping step of sucking the concrete in the S-shaped distribution valve 17 into the cylinder connected to the S-shaped distribution valve 17, and simultaneously The concrete in the crucible to which the hopper 18 is connected is pushed into the hopper 18.
  • the step of conveying the concrete into the conveying pipe when the movement of the piston rod of the main cylinder for conveying the concrete causes the position sensor provided on the main cylinder to be triggered, it is determined that the main cylinder is moved to the predetermined position. Specifically, as shown in FIG. 2 and FIG.
  • a first sensing device 15 and a second sensing device 16 are respectively disposed on the first main oil rainbow 13 and the second main oil rainbow 14, for example, when the first main When the oil rainbow 13 moves forward 4 to convey the mixed soil through the first cylinder 20 to the S-shaped distribution valve 17, when the first sensing device 15 is triggered, it is determined that the two main oil rainbows move to the predetermined position, Further, the pumping step is suspended, and the swinging step is performed, and then the pumping step is performed again. Specifically, if it is controlled by the hydraulic system, as shown in FIG.
  • the small hydraulic valve 2 is driven to reverse, thereby driving the large hydraulic directional control valve 3 to reverse, and the main oil red will be reversed to become the first main oil red 13 direction.
  • the second main oil red 14 moves forward until the second main oil red 14 triggers the second sensing device 16, and the cycle begins again.
  • the two electromagnets of the solenoid valves 1 and 8 respectively can change the commutation of the large hydraulic valves 3 and 10, and realize the commutation of the main cylinder, which is an auxiliary function, and can be used for the flexible control system of the electronic control system. to.
  • a second embodiment of the method of controlling the concrete pump to be pumped again after shutdown may be implemented, i.e., only steps S 102, S 103 described above, that is, swinging hopper 18, may be implemented.
  • the S-shaped distribution valve 17 causes the first end of the S-shaped dispensing valve 17 to leave the originally turned-on blush and turn on the other red, and then changes the direction of movement of the main oil red before stopping, to pass the other A cylinder begins to transport concrete into the duct.
  • a third embodiment of the method for controlling the concrete pump to be pumped again after shutdown according to the present invention can be implemented, that is, on the basis of the second embodiment, in step 4 Before the S 105, the step S gathers S 104, keeps the S-shaped distribution valve 17 stationary, and changes the direction of movement of the main oil rainbow to counter-pump the concrete from the conveying pipe.
  • the method for controlling the concrete pump to back-pump after stopping according to the first embodiment of the present invention includes the following steps: Step S201, keeping the S-shaped distribution valve 17 in the hopper 18 stationary, changing the main oil.
  • the step of back-pumping concrete from the conveying pipe comprises: a reverse pumping step of sucking the concrete in the S-shaped distribution valve 17 into the cylinder connected to the S-shaped distribution valve 17, and simultaneously with the hopper
  • the concrete in the crucible that is connected is pushed into the hopper 18; when the main cylinder moves to the predetermined position, the anti-pumping step is suspended, and the swinging step is performed, and the S-shaped distribution valve 17 is swung to change the first end of the S-shaped distribution valve 17
  • the back pump step is returned, and the above control logic is repeated as described above.
  • the anti-pump opening process has a large vibration.
  • the cylinder that turns on the conveying pipe before the counter pump changes from the pushing material to the pumping, which solves the situation that the counter pump cylinder is blocked when the pipe is blocked, and the anti-pumping capacity is improved, which reduces the vibration and wear of the whole machine.
  • the step of back-pumping the concrete from the conveying pipe when the movement of the piston rod of the main cylinder that conveys the concrete into the hopper 18 causes the position sensor provided on the main cylinder to be triggered, it is determined that the main oil rainbow is Move to the predetermined position. Specifically, as shown in FIG. 2 and FIG.
  • a first sensing device 22 and a second sensing device 23 are respectively disposed on the first main oil rainbow 13 and the second main oil rainbow 14, for example, when When the first master cylinder 13 is advanced to convey concrete into the hopper 18 through the first cylinder 20, when the first sensing device 22 is triggered, it is determined that the two main oil rainbows move to a predetermined position, thereby suspending the back pump Step, and perform the swinging step, and then perform the back pumping step again. Specifically, if it is controlled by the hydraulic system, the control method is similar to the hydraulic control method in the method of controlling the concrete pump to be pumped again after the shutdown, and will not be repeated again.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)

Description

控制混凝土泵在 4亭枳 i后再次泵送和反泵的方法 技术领域 本发明涉及混凝土泵领域, 尤其涉及一种控制混凝土泵在停机后再次泵送 的方法和一种控制混凝土泵在停机后反泵的方法。 背景技术 如图 1和图 2所示,混凝土泵包括向目的地输送混凝土的输送管 A和混凝 土泵的主机部分 B , 其中, 混凝土泵的主机部分 B包括料斗 18、一对砼虹(第 一 紅 20和第二 紅 21 ), 一对主油紅 (第一主油紅 13和第二主油紅 14 ), S 形分配阀 17以及一对摆动油缸(第一摆动油虹 11和第二摆动油虹 12 )等。 其 中, 砼虹用于从料斗中向输送管泵送混疑土, 由交替运动的主油虹驱动; S形 分配阀 17位于料斗 18中, 并与输送管连接, S形分配阀 17交替的与其中的一 个砼虹来连通, 以分配混凝土, 此时另外的一个砼缸就从料斗中吸取混凝土。 具体地, S形分配阀的交替摆动是由一个或多个的执行器(摆动油缸)实现的。 另外, 混凝土泵中还包括蓄能器和恒压泵。 蓄能器提供一个压力冲击使 S 形分配阀在摆动时达到足够的加速度和速度以保证泵送动作和分配管道的协 调性及足够的流量。执行器主要用于驱动 S形分配阀的重力, S形分配阀与其 他机械部分的摩擦力, S形分配阀内混凝土柱的切断力及料斗 18内混凝土的阻 力。 恒压泵用于给蓄能器提供压力油, 蓄能器的压力上限由恒压泵决定。 当蓄 能器压力充至目标值(称恒压泵压力切断值)时, 恒压泵的输出流量自动减小, 甚至为 0, 此时蓄能器中的压力大小与恒压泵的压力切断值相等。 混疑土泵的工作原理: 如图 2所示, 混凝土泵存在两种状态, 泵送工作, 即将混凝土泵送到目的 地, 实现布料操作; 反泵工作, 即将混凝土输送管中的混凝土回收至料斗内, 此时多是工作结束或有混凝土料堵塞在输送管时。 混疑土泵的泵送工作逻辑: 第一主油虹 13在控制系统的操控下推进时, 第一摆动油虹 11和第二摆动 油紅 12将驱动 S形分配阀接通第一主油紅 13侧的第一 紅 20,此时第一主油 缸 13将第一砼虹 20内的混凝土推入 S形分配阀, 第二主油虹 14将料斗 18内 的混凝土吸入第二砼缸 21 ;当两个主油虹运动到预定位置时,将进行如下转换, 第二主油虹 14在动力源及控制系统的操控下推进时, 摆动油虹将驱动 S形分 配阀接通第二主油紅 14侧的第二 紅 21 , 此时第二主油紅 14将第二 紅 21 内的混凝土推入 S形分配阀, 第一主油虹 13将料斗 18内的混凝土吸入第一砼 缸 20; 直到两个主油缸再次运动到预定位置, 系统将重复上述所有逻辑。 这样 混凝土泵就实现了将料斗 18 内的混凝土不断输出到 S形分配阀中, 再经输送 管 (如图 1所示)输送的目的地。 混凝土泵的反泵工作逻辑: 第一主油虹 13 在动力源及控制系统的操控下推进时, 摆动油缸将驱动 S 形分配阀 17接通第二主油紅 14侧的混凝土第二 紅 21 , 此时第一主油紅 13 将第一砼缸 20内的混凝土推入料斗 18,第二主油缸 14将 S形分配阀内的混凝 土吸入第二砼缸 21 ; 当两个主油缸运动到预定位置时, 将进行如下转换, 第二 主油缸 14在动力源及控制系统的操控下推进时, 摆动油缸将驱动 S形分配阀 17接通第一主油紅 13侧的第一 紅 20, 此时第二主油紅 14将第二 紅 21内 的混凝土推入料斗 18, 第一主油虹 13将 S形分配阀内的混凝土吸入第一砼缸 20; 直到两个主油虹再次运动到预定位置, 系统将重复上述所有逻辑。 这样泵 送机构就实现了将输送管内的混凝土不断吸入到 S形分配阀中,再经 S形分配 阀吸入料斗 18。 图 3给出了实现以上逻辑的一种液压控制回路, 其中, 电磁换向阀 1和小 液动换向阀 2用于驱动大液动换向阀 3换向, 大液动换向阀 3用于驱动主油紅 换向; 同样道理, 电磁换向阀 8和小液动换向阀 9用于驱动大液动换向阀 10 换向, 大液动换向阀 10 用于驱动摆动油紅换向, 其中主油紅包括第一主油紅 13和第二主油紅 14, 摆动油紅包括第一摆动油紅 11和第二摆动油紅 12。 第一 油泵 4用于驱动主油缸, 第二油泵 5用于驱动摆动油虹。 第二油泵 5向蓄能器 7中提供液压油, 蓄能器 7驱动第一摆动油虹 11和第二摆动油虹 12的摆动 由于混凝土泵的使用环境, 在工作一段时间后必定会有一定时间的停顿后 再次工作, 现行技术中若混凝土泵停机后再次启动, 油缸及摆动油缸的将驱动 执行机构做如下操作: 若泵送停机后再次开机泵送: 若未到达换向触发信号位置, 则泵送机构将保持原有的运动方向进行泵送 推料, 即若停机前第一主油虹 13是推进状态, S形分配阀接通第一主油缸 13 侧的第一砼虹 20 , 则开泵送后, 第一主油缸 13将继续推进, 第一砼虹 20中的 混疑土继续经过 S形分配阀 4舞入输送管。 若泵送停机后开机反泵: 若未到达换向触发信号位置, 则第一主油缸 13和第二主油缸 14将保持原 有的运动方向, 而 S形分配阀将切换方向, 即若泵送时第一主油虹 13是推进 状态, S形分配阀接通第一主油缸 13侧的第一砼缸 20 , 则开反泵后, 第一主 油缸 13将继续推进, S形分配阀将切换至第二主油虹 14侧的第二砼虹 21 , 第 二主油紅 14将往料斗 18反方向运动, 此时便实现了反泵還辑(通过第二主油 缸 14将输送管及 S形分配阀中混凝土吸入砼缸, 通过第一主油虹 13将第一砼 缸 20中混凝土推入料斗 18中)。 现有技术的缺点: 控制方法容易造成堵管及易损件的加速磨损。 具体地: 泵送停机后再次开机泵送: 图 1中可以看出, 在泵送停机时, 输送管中仍有大量的混凝土, 在停机过 程中, 混凝土在重力作用下将逐渐下沉, 并将水分不断析出, 部分水分会不断 从管道结合处流出输送管, 此时输送管中的混凝土状况将变差, 此时立即开机 泵送会因为混凝土变差引起的阻力上升造成较大冲击, 恶劣时会直接 I起堵管 (混凝土堵塞输送管)。 不管是冲击振动还是堵管都将造成整机的加速磨损及 功耗、 成本的浪费。 泵送停机后反泵: 这是机械使用过程中操作比较频繁的一项功能, 现有技术中摆动油缸将首 先切换至另外位置再进行反泵抽料操作。 如前述分析, 由于水分析出或混凝土 初凝或混凝土在自身重力作用下都会引起 S形分配阀及料斗 18 中的混凝土状 况变差, 阻力变大, 此时 S形分配阀摆动阻力将大大提升, 直接驱动将引起较 大冲击, 磨损及能量浪费。 发明内容 本发明所要解决的技术问题是提供一种控制混凝土泵在停机后再次泵送 的方法和一种控制混凝土泵在停机后再次反泵的方法, 能够优化混凝土料况, 降低泵送的阻力和整机的磨损。 为解决上述技术问题, 根据本发明的一个方面, 提供了一种控制混凝土泵 在停机后再次泵送的方法, 包括: 摆动料斗中的 S形分配阀, 使 S形分配阀的 第一端离开原先接通的砼虹, 并接通另一个砼虹, 然后相对于停机前改变主油 缸的运动方向, 以通过另一个砼缸开始向输送管中输送混凝土。 进一步地, 在摆动料斗中的 S形分配阀之前, 还包括: 保持 S形分配阀不 动, 改变主油紅的运动方向, 以从输送管中反抽混凝土。 进一步地, 在摆动料斗中的 S形分配阀之前, 还包括: 判断混凝土泵停机 的时间; 若凝土泵停机的时间大于或等于预定值 a, 则保持 S形分配阀不动, 改变主油紅的运动方向, 以从输送管中反抽混凝土。 进一步地, 输送混凝土的步骤包括: 泵送步骤, 将与 S形分配阀接通的砼 缸中的混凝土推入 S形分配阀,同时将料斗中的混凝土吸入与料斗接通的砼缸; 当主油虹运动到预定位置时, 暂停泵送步骤, 并执行摆动步骤, 摆动 S形分配 阀, 使 S形分配阀的第一端变换所接通的砼缸; 在执行完摆动步骤后, 返回泵 送步骤。 进一步地, 反抽混凝土的步骤包括: 反泵步骤, 将 S形分配阀中的混凝土 吸入与 S形分配阀接通的砼缸中, 同时将与料斗接通的砼缸中的混凝土推入料 斗。 进一步地, 当输送混凝土的主油缸的活塞杆的运动使该主油缸上设置的位 置传感器被触发时, 判定为主油缸运动到预定位置。 根据本发明的另一个方面, 还提供了一种控制混凝土泵在停机后反泵的方 法, 包括: 保持料斗中的 S形分配阀不动, 改变主油虹的运动方向, 以开始从 输送管中反抽混凝土。 进一步地, 从输送管中反抽混凝土的步骤包括: 反泵步骤, 将 S形分配阀 中的混凝土吸入与 S形分配阀接通的砼缸中, 同时将与料斗接通的砼缸中的混 凝土推入料斗; 当主油缸运动到预定位置时, 暂停反泵步骤, 并执行摆动步骤, 摆动 S形分配阀, 使 S形分配阀的第一端变换所接通的砼缸; 在执行完摆动步 綠后, 返回反泵步 4聚。 进一步地, 当输送混凝土的主油缸的活塞杆的运动使该主油缸上设置的位 置传感器被触发时, 判定为主油缸运动到预定位置。 本发明具有以下有益效果:
1. 才艮据本发明的控制混凝土泵在停机后再次泵送的方法中, S形分配阀的 摆动搅活了料斗内的混凝土, 并且通过原先抽吸混凝土的另一个砼缸来输送混 凝土; 通过原先输送混凝土的另一个砼缸来抽吸混凝土, 从而使得原先受压力 作用的砼虹变为抽吸动作, 压力得以释放, 改善了该砼缸内部的环境; 由于 S 形分配阀的摆动, 使得其中的千料在重力作用下回流 (因吸料效率小于 1 , 砼 虹未吸满), 改善了即将输送混凝土的砼缸及 S形分配阀中的料况。
2. 在根据本发明的控制混凝土泵在停机后反泵的方法中, 由于首先改变主 油虹的运动方向,以从输送管中反抽混凝土,从而避免了 S形分配阀首先摆动, 进而避免了冲击。 除了上面所描述的目的、 特征和优点之外, 本发明还有其它的目的、 特征 和优点。 下面^ 1参照图, 对本发明作进一步详细的说明。 附图说明 附图用来提供对本发明的进一步理解, 构成本申请的一部分, 本发明的示 意性实施例及其说明用于解释本发明, 并不构成对本发明的不当限定。 在附图 中: 图 1是混凝土泵的整体结构示意图; 图 2是混凝土泵的除输送管外的结构示意图; 图 3是混凝土泵的一种液压控制回路示意图; 图 4示出了根据本发明的第一实施例的控制混凝土泵在停机后再次泵送的 方法的流程图; 图 5示出了根据本发明的第一实施例的控制混凝土泵在停机后反泵的方法 的流程图。 具体实施方式 以下结合附图对本发明的实施例进行详细说明, 但是本发明可以由权利要 求限定和覆盖的多种不同方式实施。 如图 4所示, 根据本发明的第一实施例的控制混凝土泵在停机后再次泵送 的方法包括如下步 4聚: 步骤 S 101 : 判断混凝土泵停机的时间是否大于预定值 a。 其中, 预定值 a 才艮据混凝土泵的具体情况而定, 例如 10分钟。 若混凝土泵停机的时间小于预定值 a, 则顺次执行步骤 S 102和步骤 103。 其中, 步骤 S 102: 摆动料斗 18中的 S形分配阀 17, 使 S形分配阀 17的 第一端离开原先接通的 紅, 并接通另一个 紅。 步骤 S 103 : 相对于停机前改变主油紅的运动方向, 以开始通过另一个 紅 向输送管中输送混;疑土。 由于待料过久后, 输送管、 S形分配阀及连接的砼缸内的混凝土在自重的 作用下压实, 由于密封原因可能出现料析水变差情况, 逻辑改进为 S形分配阀 摆动至另一砼虹后再进行泵送。 此时有三点好处: 1. S形分配阀运动搅活了料 斗内的料, 疏松了变差的混凝土, 降低工作过程的振动及磨损。 2. 原受压力作 用的砼虹变为吸料, 压力得以释放, 改善了其内部的料况环境。 3. S形分配阀 内的千料在重力作用下回流(因吸料效率小于 1 , 砼虹未吸满), 改善即将输送 的砼缸及管道的料况。 若混疑土泵停机的时间大于预定值 a, 则顺次执行步 4聚 S 104、 步 4聚 S 105 和步 4聚 S 106。 其中, 步骤 S 104, 保持 S形分配阀 17不动, 改变主油虹的运动方向, 以 从输送管中反抽混凝土。 步 4聚 S 105 , 摆动 S形分配阀 17, 使 S形分配阀 17的第一端离开原先接通 的 紅, 并接通另一个 紅。 步骤 S 106, 通过另一个砼缸开始向输送管中输送混凝土。 由于先反抽、 再摆动 S形分配阀、 再输送混凝土的方法首先将砼管、 S形 分配阀、 砼缸及料斗内的料进行了减压或活动, 后由 S形分配阀将料斗内的料 再次搅拌, 疏松了变差的混凝土, 降氐工作过程的振动及磨损。 这时系统内的 混凝土料况将得以极大优化, 降低了泵送、 摆动阻力及整机的磨损。 该方案可 解决主虹可驱动范围内的差料况问题。 优选地,在步骤 S 103和步骤 S 106中,向输送管中输送混凝土的步骤包括: 泵送步骤, 将与 S形分配阀 17接通的砼缸中的混凝土推入 S形分配阀 17 中, 同时将料斗 18中的混凝土吸入与料斗 18接通的砼缸; 当主油虹运动到预定位置时, 暂停泵送步骤, 并执行摆动步骤, 摆动 S形 分配阀 17, 使 S形分配阀 17的第一端变换所接通的砼缸; 在执行完摆动步骤后,返回上述的泵送步骤,如此反复进行上述控制逻辑。 优选地, 在步骤 S 104中, 从输送管中反抽混凝土的步骤包括: 反泵步骤, 将 S形分配阀 17中的混凝土吸入与 S形分配阀 17接通的砼缸中, 同时将与料 斗 18接通的砼缸中的混凝土推入料斗 18。 另外, 更优选地, 向输送管中输送混凝土的步骤中, 当输送混凝土的主油 缸的活塞杆的运动使该主油缸上设置的位置传感器被触发时, 判定为主油缸运 动到预定位置。 具体地, 如图 2和图 3所示, 在第一主油虹 13和第二主油虹 14上分别设置有第一传感装置 15和第二传感装置 16, 例如, 当第一主油虹 13 向前 4舞进以通过第一砼缸 20向 S形分配阀 17输送混疑土时, 当第一传感装置 15被触发时, 判定为两个主油虹运动到预定位置, 进而暂停泵送步骤, 并执行 摆动步 4聚, 之后再次进行泵送步 4聚。 具体地, 若通过液压系统来控制, 则如图 3所示, 正常工作时, 电磁阀 1 , 8一边得电, 個 _设此时第一主油紅 13向前运动, 第一摆动油紅 11向前运动, 此时只要第一主油缸 13运行到触发第一传感装置 15 , 便发出液控信号, 驱动 小液动换向阀 9换向, 小液动换向阀 9驱动大液动换向阀 10换向, 大液动换 向阀 10驱动第一摆动油紅 11换向, 变为第二摆动油紅 12向前, 此时图 3 中 的 S形分配阀 17便实现了摆动换向, 在两个摆动油虹换向的同时, 驱动小液 动阀 2换向, 从而驱动大液动换向阀 3换向, 此时主油紅便会换向, 变为第一 主油紅 13向后运动, 第二主油紅 14向前运动, 直到第二主油紅 14触发第二 传感装置 16, 再次开始循环。 电磁阀 1和 8的两个电磁铁分别得电也可以改变大液动阀 3和 10的换向, 实现主油缸的换向, 是一个辅助作用, 用于电控系统可灵活的控制系统换向。 可以理解, 根据工作的具体情况, 可以实施根据本发明的控制混凝土泵在 停机后再次泵送的方法的第二实施例,即仅实施上述步骤 S 102、 S 103 ,也就是, 摆动料斗 18中的 S形分配阀 17,使 S形分配阀 17的第一端离开原先接通的砼 紅, 并接通另一个 紅, 然后相对于停机前改变主油紅的运动方向, 以通过所 述另一个砼缸开始向输送管中输送混凝土。 另外, 还可以理解, 居工作的具体情况, 可以实施才艮据本发明的控制混 凝土泵在停机后再次泵送的方法的第三实施例, 即在第二实施例的基础上, 在 步 4聚 S 105之前, 增加步 4聚 S 104, 保持 S形分配阀 17不动, 改变主油虹的运 动方向, 以从输送管中反抽混凝土。 如图 5所示, 根据本发明的第一实施例的控制混凝土泵在停机后反泵的方 法包括如下步 4聚: 步骤 S201 ,保持料斗 18中的 S形分配阀 17不动,改变主油虹的运动方向, 以开始从输送管中反抽混;疑土。 优选地, 在步骤 S201中, 从输送管中反抽混凝土的步骤包括: 反泵步骤, 将 S形分配阀 17中的混凝土吸入与 S形分配阀 17接通的砼缸 中, 同时将与料斗 is接通的砼缸中的混凝土推入料斗 18; 当主油缸运动到预定位置时, 暂停反泵步骤, 并执行摆动步骤, 摆动 S形 分配阀 17, 使 S形分配阀 17的第一端变换所接通的砼缸; 在执行完摆动步骤后, 返回反泵步骤, 如此反复进行上述控制逻辑。 现有技术中反泵开启过程会有较大振动。 此时更改为首先抽料再摆动油缸 换向。 反泵前接通输送管的缸由推料变为抽料, 解决了堵管时反泵摆缸受阻的 情况, 且反泵能力会提高, 降低整机振动及磨损。 另外, 更优选地, 从输送管中反抽混凝土的步骤中, 当向料斗 18 中输送 混凝土的主油缸的活塞杆的运动使该主油缸上设置的位置传感器被触发时, 判 定为主油虹运动到预定位置。 具体地, 如图 2和图 3 所示, 在第一主油虹 13 和第二主油虹 14上分别设置有第一传感装置 22和第二传感装置 23 , 例如, 当 第一主油缸 13向前推进以通过第一砼缸 20向料斗 18中输送混凝土时, 当第 一传感装置 22被触发时, 判定为两个主油虹运动到预定位置, 进而暂停反泵 步骤, 并执行摆动步骤, 之后再次进行反泵步骤。 具体地, 若通过液压系统来控制, 控制方式与控制混凝土泵在停机后再次 泵送的方法中的液压控制方式类似, 再次不再赞述。 以上所述仅为本发明的优选实施例而已, 并不用于限制本发明, 对于本领 域的技术人员来说, 本发明可以有各种更改和变化。 凡在本发明的 ^"神和原则 之内, 所作的任何修改、 等同替换、 改进等, 均应包含在本发明的保护范围之 内。

Claims

权 利 要 求 书
1. 一种控制混凝土泵在停机后再次泵送的方法, 其特征在于, 包括:
摆动料斗 ( 18) 中的 S形分配阀 ( 17), 使所述 S形分配阀 ( 17) 的第一端离开原先接通的砼虹, 并接通另一个砼虹, 然后
相对于停机前改变主油紅的运动方向, 以通过所述另一个 紅开始 向输送管中输送混;疑土。
2. 根据权利要求 1所述的方法, 其特征在于, 在摆动料斗 ( 18) 中的 S形 分配阀 ( 17) 之前, 还包括: 保持所述 S形分配阀 ( 17) 不动, 改变主 油虹的运动方向, 以从输送管中反抽混凝土。
3. 根据权利要求 1所述的方法, 其特征在于, 在摆动料斗 ( 18) 中的 S形 分配阀 ( 17) 之前, 还包括:
判断所述混凝土泵停机的时间;
若所述凝土泵停机的时间大于或等于预定值 a, 则保持所述 S形分 配阀 ( 17) 不动, 改变主油虹的运动方向, 以从输送管中反抽混凝土。
4. 根据权利要求 1-3 中的任何一项所述的方法, 其特征在于, 所述输送混 凝土的步骤包括:
泵送步骤, 将与所述 S形分配阀 ( 17)接通的砼缸中的混凝土推入 所述 S形分配阀 ( 17 ), 同时将所述料斗( 18 ) 中的混凝土吸入与所述料 斗 ( 18 )接通的石仝紅;
当所述主油虹运动到预定位置时, 暂停所述泵送步骤, 并执行摆动 步骤, 摆动所述 S形分配阀 ( 17), 使所述 S形分配阀 ( 17) 的第一端 变换所接通的砼缸;
在执行完所述摆动步 4聚后, 返回所述泵送步 4聚。
5. 根据权利要求 3所述的方法, 其特征在于, 所述反抽混凝土的步骤包括: 反泵步 4聚, 将所述 S形分配阀 ( 17 ) 中的混疑土吸入与所述 S形分 配阀 ( 17)接通的砼虹中, 同时将与所述料斗 ( 18)接通的砼缸中的混 凝土推入所述料斗 ( 18 )。
6. 根据权利要求 4所述的方法, 其特征在于, 当输送混凝土的主油缸的活 塞杆的运动使该主油缸上设置的位置传感器被触发时, 判定为所述主油 虹运动到预定位置。
7. —种控制混凝土泵在停机后反泵的方法, 其特征在于, 包括:
保持料斗 ( 18) 中的 S形分配阀 ( 17) 不动, 改变主油虹的运动方 向, 以开始从输送管中反抽混凝土。
8. 根据权利要求 7所述的方法, 其特征在于, 所述从输送管中反抽混凝土 的步 4聚包括:
反泵步 4聚, 将所述 S形分配阀 ( 17 ) 中的混疑土吸入与所述 S形分 配阀 ( 17)接通的砼虹中, 同时将与料斗 ( 18)接通的砼缸中的混凝土 推入所述料斗 ( 18);
当所述主油虹运动到预定位置时, 暂停所述反泵步骤, 并执行摆动 步骤, 摆动所述 S形分配阀 ( 17), 使所述 S形分配阀 ( 17) 的第一端 变换所接通的砼缸;
在执行完所述摆动步骤后, 返回所述反泵步骤。
9. 根据权利要求 8所述的方法, 其特征在于, 当输送混凝土的主油缸的活 塞杆的运动使该主油缸上设置的位置传感器被触发时, 判定为所述主油 虹运动到预定位置。
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CN114922819B (zh) * 2022-05-23 2023-01-31 中联重科股份有限公司 泵送设备中新运输混凝土的识别方法及泵送控制方法

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EP2660468A1 (en) 2013-11-06
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