WO2012024964A1 - Véhicule pour le pompage de béton et procédé de commande de ce véhicule, système de pompage et mécanisme de distribution de ce système - Google Patents

Véhicule pour le pompage de béton et procédé de commande de ce véhicule, système de pompage et mécanisme de distribution de ce système Download PDF

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Publication number
WO2012024964A1
WO2012024964A1 PCT/CN2011/075715 CN2011075715W WO2012024964A1 WO 2012024964 A1 WO2012024964 A1 WO 2012024964A1 CN 2011075715 W CN2011075715 W CN 2011075715W WO 2012024964 A1 WO2012024964 A1 WO 2012024964A1
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WO
WIPO (PCT)
Prior art keywords
cylinder
pumping system
drive
delivery
pumping
Prior art date
Application number
PCT/CN2011/075715
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English (en)
Chinese (zh)
Inventor
符智
李建涛
张涛
Original Assignee
湖南三一智能控制设备有限公司
三一重工股份有限公司
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Application filed by 湖南三一智能控制设备有限公司, 三一重工股份有限公司 filed Critical 湖南三一智能控制设备有限公司
Publication of WO2012024964A1 publication Critical patent/WO2012024964A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04B15/02—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being viscous or non-homogeneous
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
    • E04G21/04—Devices for both conveying and distributing
    • E04G21/0418—Devices for both conveying and distributing with distribution hose
    • E04G21/0445—Devices for both conveying and distributing with distribution hose with booms
    • E04G21/0454—Devices for both conveying and distributing with distribution hose with booms with boom vibration damper mechanisms

Definitions

  • the present invention relates to a technique for pumping concrete or other viscous materials, and more particularly to a dispensing mechanism for a pumping system, including a pumping system of the dispensing mechanism, including a concrete pump truck of the pumping system; A method of controlling a pumping system. Background technique
  • Concrete pump trucks are one of the most widely used concrete machines.
  • Concrete pump trucks typically include a pumping system and a boom system.
  • the pumping system generally further comprises a hopper, a conveying cylinder and a distribution valve;
  • the boom system comprises a boom and a conveying pipe, and the boom comprises a plurality of section arms hingedly connected by a transverse hinge shaft, and the conveying pipe comprises a plurality of sections connected in series.
  • the pipes are fixed to the pitch arms respectively.
  • the hopper is used to store the concrete;
  • the distribution valve is capable of state switching under the driving of the oscillating cylinder, and the delivery cylinder is communicated with the hopper for a predetermined first time, and the delivery cylinder is communicated with the delivery tube of the boom system for a predetermined second time.
  • the piston of the conveying cylinder can be telescopically driven by the hydraulic cylinder; when the conveying cylinder communicates with the hopper, the piston of the conveying cylinder is retracted, the suction is sucked, and the appropriate amount of concrete is sucked; the conveying cylinder communicates with the conveying pipe of the boom system
  • the piston of the conveying cylinder When the piston of the conveying cylinder is extended, the inhaled concrete slurry is pressed into the conveying pipe, the pumping material is applied, and a predetermined pressure is applied to the concrete to flow the concrete along the conveying pipe; the suction and pumping materials can make the concrete Arrives at the end of the duct and flows out from the end of the duct to the intended concrete working position.
  • the position of the end of the boom can be changed, so that the concrete reaches a predetermined position, which facilitates the concrete pouring operation.
  • the dispensing valve of the pumping system can be a skirt valve, a C-shaped valve, a gate valve or an S-valve.
  • the basic function of the distribution valve is that the pumping system can repeatedly perform the suction and pumping in a predetermined manner through the state transition, so that the pumping can be intermittently pumped. Concrete, which causes the concrete to flow intermittently inside the duct. Please refer to FIG. 1 , which is a schematic diagram of the principle of intermittent flow of concrete in a conveying pipe in the prior art.
  • the flow velocity V of the concrete periodically changes with the time T as a variable.
  • the concrete flows at the velocity V under the pressure generated by the delivery cylinder; during T2, the distribution valve performs state transition and the delivery cylinder performs Reversing, simultaneously sucking, providing the premise for the pumping of the next process; during the sucking process, the pumping system stops pumping outward, the concrete in the duct stops flowing, forming a pumping interval; at the end of the suction After that, enter the pumping process of the next cycle. This is periodically changed to form intermittent pumping, which causes the concrete to flow intermittently within the duct.
  • the pumping system is usually provided with two conveying cylinders, and the two conveying cylinders also pump the material through a dispensing valve;
  • the other pumping cylinder pumps the two delivery cylinders to take the suction and pumping, which in turn shortens the pumping interruption time.
  • the transfer cylinder is in the state transition, the commutation is also performed, and the dispense valve is also subjected to state transition, so that the pumping interval cannot be completely eliminated.
  • the boom system in order to transport the concrete to a farther or higher position, the boom system is a long rod-like structure as a whole; the long rod-shaped boom system also amplifies the vibration generated by the boom system, so that the end of the boom Produces a very large vibration.
  • the frequency of the pulsed shock generated by the interval pumping of the pumping system is close to or equal to the natural vibration frequency of the boom system, the boom system will generate a strong resonance.
  • the vibration amplitude at the end of the boom It may reach more than l; the vibration generated by the boom system with excessive amplitude and intensity not only makes it difficult for concrete to reach the predetermined position, but also affects the quality and smooth operation of the concrete work, and also causes fatigue damage of the pumping system and the boom system, which in turn affects the concrete.
  • the service life of the pump truck may reach more than l; the vibration generated by the boom system with excessive amplitude and intensity not only makes it difficult for concrete to reach the predetermined position, but also affects the quality and smooth operation of the concrete work, and also causes fatigue damage of the pumping system and the boom system, which in turn affects the concrete. The service life of the pump truck.
  • the currently disclosed technology has a passive damping technology that suppresses the vibration of the boom, reduces the impact of the split valve cylinder, shortens the commutation time of the swing cylinder, and reverses the impact of the buffer cylinder.
  • JP3040592B2, CN1486384A, and CN1932215A respectively disclose a technical solution for suppressing vibration of the boom system.
  • DE 102006028329 A1 discloses a pumping system for a double distribution valve, which is provided with two delivery cylinders and two S-shaped distribution valves, the two distribution tubes being rotatably mounted in a predetermined volume, respectively, and one for each delivery
  • the cylinders are matched; this provides two sets of pumping and suction mechanisms, and the two sets of mechanisms are matched.
  • the pumping system essentially combines two sets of mechanisms, not only failing to substantially change the structure of the pumping system, Moreover, the structure of the pumping system is complicated, and the control process is also very complicated.
  • a first object of the present invention is to provide a dispensing mechanism of a pumping system, by which materials can be pumped continuously or uniformly to reduce discontinuous and unstable flow of materials. Vibration.
  • a second object of the present invention is to provide a pumping system.
  • a third object of the present invention is to provide a concrete pump truck.
  • a fourth object of the present invention is to provide a method of controlling a pumping system for continuously pumping material to reduce vibrations due to discontinuous flow of material.
  • the dispensing mechanism of the pumping system comprises a wear plate and at least two distribution pipes, the distribution pipe having an input end and an output end, respectively, and the output end of the distribution pipe Rotatingly connected to form an axis of rotation; the input ends of the two distribution tubes are respectively offset from the rotation axis, and the end faces of the input end are matched with the wear-resistant surface of the wear plate;
  • the wear plate has at least three feed holes distributed around the axis of rotation; and when each of the distribution tubes rotates about the axis of rotation, it can be in communication with at least two feed holes.
  • the dispensing mechanism of the pumping system includes two of the dispensing tubes.
  • the wear plate has three delivery holes, and the three delivery holes are all distributed around the rotation axis.
  • the dispensing mechanism of the pumping system further includes a transmission mechanism including a transmission shaft and a transmission sleeve rotatably sleeved outside the transmission shaft; a front end of the transmission shaft and a transmission sleeve The front end is respectively fixed to the two distribution pipes; the rear end of the transmission shaft and the rear end of the transmission bushing extend rearward through the wear plate.
  • a transmission mechanism including a transmission shaft and a transmission sleeve rotatably sleeved outside the transmission shaft; a front end of the transmission shaft and a transmission sleeve The front end is respectively fixed to the two distribution pipes; the rear end of the transmission shaft and the rear end of the transmission bushing extend rearward through the wear plate.
  • a rear end of the transmission shaft extends from a rear end surface of the transmission bushing.
  • the dispensing mechanism of the pumping system further includes two driving devices, and the rear end of the driving shaft and the rear end of the driving sleeve are respectively connected to two driving devices.
  • the driving device includes a swinging arm and a swinging cylinder, and one end of the swinging arm is connected to a rear end of the driving shaft or a rear end of the driving sleeve, and the other end is hingedly connected to one end of the swinging cylinder, The other end of the sump is hinged to a predetermined base that is relatively fixed to the wear plate; one end of the oscillating arm is coupled to the rear end of the drive shaft or the rear end of the drive sleeve by a ratchet mechanism.
  • the driving device comprises a driving cylinder, a locking cylinder, a locking rack and a driving rack, wherein the two ends of the locking rack are respectively hinged with a predetermined base and a rotating sleeve; one end of the driving rack Slidably engaging with the rotating sleeve, the other end is connected to one end of the driving cylinder, and the other end of the driving cylinder is connected to a predetermined base; one end of the locking cylinder is hinged to the predetermined base, and the other end is locked with the lock
  • the rack is hinged; the predetermined base is relatively fixed to the wear plate; the rear end of the drive shaft or the rear end of the drive sleeve has a transmission tooth; when the lock cylinder is shortened, the lock rack Separating from the transmission teeth, the driving rack meshes with the transmission teeth, and the telescopic direction of the driving cylinder is the same as the extending direction of the driving rack; when the locking cylinder is extended, the locking teeth are A strip engages the drive teeth, the drive rack
  • the driving device further includes a sliding sleeve fixed to a predetermined base, one end of the driving cylinder is slidably engaged with the sliding sleeve, and is hingedly connected to the driving rack through the sliding sleeve; or One end of the drive cylinder is fixedly connected to the drive rack, and the other end is fixed with a predetermined basis Articulated.
  • the present invention provides a pumping system comprising a hopper, further comprising at least three delivery cylinders and a dispensing mechanism of any of the above-described pumping systems, the dispensing tube being located in the hopper, and the wear plate and The hopper is fixed, and the wear surface of the wear plate faces the hopper, and the transfer cylinders are respectively communicated with one of the feed holes of the wear plate, and the distribution pipe is rotatable relative to the hopper.
  • the concrete pump truck provided by the present invention comprises a boom system and a pumping system, wherein the pumping system is any one of the above pumping systems, and the output ends of the distribution tubes are The ducts of the boom system are connected.
  • the present invention provides a control method for controlling a pumping system of the above pumping system, in which the two of the distribution pipes are a first distribution pipe and a second distribution pipe, respectively
  • the three conveying cylinders are respectively a first conveying cylinder, a second conveying cylinder and a third conveying cylinder;
  • the control method includes: first conveying in a first period when the first distribution pipe and the second distribution pipe are respectively in communication with the first delivery cylinder and the second delivery cylinder, and the piston of the second delivery cylinder is decelerated forward
  • the piston of the cylinder accelerates forward; when the forward movement speed of the piston of the second delivery cylinder decreases to zero, the piston movement speed of the first delivery cylinder is maximized, and the hook movement is started;
  • the second distribution pipe is rotated from a position communicating with the second transfer cylinder to a position communicating with the third transfer cylinder, and the third transfer cylinder is in the second distribution pipe and the third
  • the suction is completed at a predetermined time before the delivery cylinder communicates.
  • the acceleration of the piston of the first delivery cylinder is equal to the acceleration of the piston of the second delivery cylinder.
  • the dispensing mechanism of the pumping system comprises a wear plate and at least two distribution pipes, the output ends of the distribution pipes are rotatably coupled together and form an axis of rotation; and the wear plate used in conjunction with the distribution pipe Including at least three feed holes; when the distribution pipe rotates about the rotation axis, at any different position, any distribution pipe can communicate with at least two feed holes; when the feed hole communicates with the transfer cylinder, the corresponding transfer cylinder Material can be pumped outward through the delivery orifice and the corresponding dispensing tube.
  • the pumping action of at least two conveying cylinders can be coordinated by rotating the distribution pipe, so that the pumping system can continuously pump materials outward, eliminating the pumping interval during the pumping process. Time; further, by accurately controlling the motion relationship between the pistons of the delivery cylinder, The pumping system can be pumped uniformly to the material to reduce or avoid the pulsating flow of the material, further reducing the vibration caused by the unstable flow of the material.
  • the wear plate has three feed holes, and the three feed holes are evenly distributed around the rotation axis, so that the control of the rotation of the distribution pipe can be facilitated.
  • the transmission mechanism includes a transmission shaft and a transmission sleeve sleeved outside the transmission shaft; the structure can reduce the space occupied by the transmission mechanism and improve the reliability of the transmission mechanism.
  • the driving device comprises a driving rack, a locking rack, a driving cylinder and a locking cylinder; in one state, the driving device can drive the transmission shaft or the transmission sleeve to rotate, in another state Next, the locking rack can lock the transmission shaft or the transmission sleeve to prevent the distribution tube from deviating from the predetermined position, which can improve the reliability of the operation of the distribution mechanism.
  • the pumping system provided including the above-described dispensing mechanism also has a corresponding technical effect. Controlling in an appropriate manner not only eliminates the pumping interval, but also uniformly pumps the material, thereby greatly reducing the vibration caused by the material flow.
  • the vibration caused by the unstable flow of the concrete can be reduced, thereby reducing the concrete pump arm. The vibration generated by the frame and its vibration amplitude.
  • the second delivery cylinder accelerates the pumping material, which enables continuous pumping of the pumping system, avoiding the pump Material spacing, eliminating vibrations generated by the boom system due to intermittent pumping.
  • the acceleration of the first delivery cylinder is equal to the acceleration of the second delivery cylinder, so that the sum of the pumping flow rates of the two delivery cylinders can be kept constant, so that uniform pumping can be achieved. Reduce vibration due to unstable material flow.
  • FIG. 1 is a schematic view showing the principle of intermittent flow of concrete in a conveying pipe in the prior art
  • FIG. 2 is an exploded view of a pumping system according to a first embodiment of the present invention
  • FIG. 3 is a schematic view showing the structure of the pumping system according to the first embodiment of the present invention
  • FIG. 4 is a schematic view showing the structure of the pumping system according to the first embodiment of the present invention
  • schematic diagram is a cross-sectional view showing the structure of Figure BB;
  • Figure 7 is an enlarged view of a portion I-I of Figure 3;
  • Figure 8 is a graph showing the relationship between the speed and time of each of the pump cylinders in the pumping system of the first embodiment;
  • Figure 9 is a perspective view showing the state of the pumping system in the first embodiment;
  • FIG. 11 is a structural view of a first type of driving device in a dispensing mechanism of the pumping system of the present invention;
  • Figure 12 is a structural view of a second type of driving device in the dispensing mechanism of the pumping system of the present invention, and is also a structural tube diagram when the driving device is in a driving state;
  • Figure 13 is a structural view of the second type of driving device shown in Figure 12 in a locked state
  • Figure 14 is a structural view of a third type of driving device provided by the present invention. detailed description
  • FIG. 2 is an exploded view of a pumping system according to Embodiment 1 of the present invention
  • FIG. 3 is a front view of a pumping system according to Embodiment 1 of the present invention.
  • Schematic diagram of the direction structure. 4 is a schematic structural view of a pumping system according to a first embodiment of the present invention
  • FIG. 5 is a cross-sectional view of the A-A of FIG. 3
  • FIG. 6 is a cross-sectional view of the B-B of FIG.
  • the pumping system is a concrete pump comprising a hopper (not shown), a dispensing mechanism and three delivery cylinders.
  • the structure of the hopper and the delivery cylinder can be the same as the known technique; for convenience of description, the three delivery cylinders are referred to as a first delivery cylinder 310, a second delivery cylinder 320, and a third delivery cylinder 330, respectively.
  • the structure of the distribution mechanism is described in detail below.
  • the dispensing mechanism includes a wear plate 200 and two dispensing tubes; for ease of description, two assignments are made
  • the tubes are referred to as a first dispensing tube 110 and a second dispensing tube 120, respectively.
  • the first distribution tube 110 and the second distribution tube 120 have an input end and an output end.
  • the output end of the first distribution pipe 110 and the output end of the second distribution pipe 120 are rotatably connected and form an axis of rotation 0-0, so that the first distribution pipe 110 can be opposite to the second distribution pipe.
  • the rotation of 120 about the axis of rotation 0-0, likewise, the second distribution tube 120 can be rotated relative to the first distribution tube 110 about the axis of rotation 0-0.
  • the input ends of the two distribution tubes are respectively offset from the rotation axis 0-0, thereby forming S-shaped tubes respectively; in this example, the distances of the input ends of the distribution tubes from the rotation axis 0-0 are equal.
  • the output end of the second distribution pipe 120 and the output end of the first distribution pipe 110 meet to form an output port for pumping material outward, and the center line of the output port coincides with the rotation axis.
  • the output end of the first distribution pipe 110 is provided with a hollow sleeve, and the rear end of the hollow sleeve is rotatably connected with the output end of the second distribution pipe 120, so that the second distribution pipe 120 and the first distribution pipe 110 are relatively rotatable;
  • One skilled in the art can maintain a seal between the hollow sleeve and the first dispensing tube 110 in a manner known per se to avoid leakage of concrete from the joint during pumping.
  • the extending direction of the wear plate 200 is perpendicular to the above-described rotation axis 0-0, and the front facing surface forms a wear surface.
  • the end faces of the input ends of the distribution pipes are matched with the wear-resistant faces of the wear plates 200.
  • the end faces of the input ends can be matched with the wear-resistant faces of the wear plates 200 to maintain The seal of the inner space of the distribution pipe.
  • the wear surface of the wear plate 200 is not limited to a flat surface, and the wear surface may be set to other specific structures while maintaining the mating with the end surface of the input end of the distribution tube according to actual needs.
  • the wear plate 200 has three feed holes 201.
  • the three feed holes 201 are evenly distributed around the rotation axis 0-0; and the center line has an equal distance from the rotation axis 0-0, the distance The distance from the input end of the dispensing tube from the axis of rotation 0-0 is equal; thus, the input end of the dispensing tube can communicate with a delivery aperture 201 as each dispensing tube rotates about the axis of rotation 0-0 and rotates to a predetermined position.
  • the input end of the distribution pipe can be provided with a cutting ring with better wear resistance
  • the wear surface of the wear plate 200 can be provided with a wear-resistant layer or other wear-resistant structure with better wear resistance. In order to improve the service life of the mating part of the distribution pipe and the wear plate 200.
  • the two distribution pipes are located in the hopper, and the wear plate 200 is fixed to the rear wall plate of the hopper, and the wear surface of the wear plate 200 faces the hopper; the front end of the second distribution pipe 120 can be combined with the front wall plate of the hopper Rotatingly connected, it is also possible to communicate with the delivery pipe outside the hopper through a suitable transition tube and to rotate the two distribution tubes relative to the hopper.
  • the three delivery cylinders are respectively in communication with the delivery holes of one wear plate 200, that is, the first delivery cylinder 310, the second delivery cylinder 320, and the third delivery cylinder 330 are also uniformly distributed around the rotation axis 0-0.
  • Fig. 7 is an enlarged view of a portion I-I of Fig. 3.
  • the transmission mechanism 400 includes a drive shaft 410 and a drive bushing 420 that is rotatably sleeved outside the drive shaft 4. Both the drive shaft 410 and the drive sleeve 420 axis coincide with the rotation axis 0-0, and the rear end of the drive shaft 410 and the rear end of the drive sleeve 420 extend rearward from the front side of the wear plate 200, respectively, and pass through the wear plate.
  • the drive bushing 420 and the wear plate 200 are rotatably coupled to rotate the drive bushing 420 and the drive shaft 410 relative to the wear plate 200; the front end of the drive shaft 410 is fixed to the second distribution pipe 120
  • the transmission bushing 420 is fixed to the first distribution pipe 110 by the intermediate rod 421, and the intermediate rod 421 extends in a direction perpendicular to the rotation axis 0-0. At least a portion of the rear end portion of the drive shaft 410 is exposed outside of the drive bushing 420 to drive the drive shaft 410 and the drive bushing 420 to rotate, respectively, by different drive mechanisms.
  • the rear end of the transmission shaft 410 protrudes from the rear end surface of the transmission bushing 420, and the rear ends of the transmission shaft 410 are respectively provided with a structure that cooperates with the driving device, and the rear end of the transmission shaft 410 and the rear end of the transmission shaft sleeve 420 can be respectively provided with a transmission. tooth.
  • the drive device may be a conventional device or a drive device to be described later.
  • FIG. 8 is a function diagram of the piston speed and time of each delivery cylinder in the pumping system of the first embodiment; in the figure, the horizontal coordinate represents the time t, the ordinate represents the speed V, and the forward movement speed is The positive value, the speed of the backward movement is a negative value; the solid line indicates the speed change of the piston of the first delivery cylinder 310, the one-dot chain line indicates the speed change of the third delivery cylinder 330, and the two-dot chain line indicates the second delivery cylinder 320. Speed changes.
  • the figure is a three-dimensional structural diagram of a state of the pumping system in the first embodiment.
  • the second distribution pipe 120 communicates with the second delivery cylinder 320 through the delivery hole 201 (refers to the pumping cavity of the delivery cylinder, for the sake of convenience, in this document, the cylinder is said to communicate with the corresponding delivery cylinder),
  • a distribution pipe 110 communicates with the first delivery cylinder 310 through the delivery hole 201, and the third delivery cylinder 330 communicates with the space in the hopper.
  • the piston of the second delivery cylinder 320 is decelerated forward, and the piston of the first delivery cylinder 310 is accelerated forward from the last end, and the two respectively pass the second sub-point.
  • the piping 120 and the first distribution pipe 110 pump concrete outward.
  • the acceleration of the piston of the first delivery cylinder 310 is equal to the acceleration of the piston of the second delivery cylinder 320, even if the speed of the piston of the first delivery cylinder 310 and the second delivery cylinder 320
  • the rate of change is equal such that the sum of the piston speeds of the first delivery cylinder 310 piston and the second delivery cylinder 320 remains constant so that the rate at which the pumping system pumps concrete outward remains the same.
  • the piston of the second delivery cylinder 320 moves to the foremost end, the speed of movement is also reduced to zero, the concrete is no longer pumped, the piston speed of the first delivery cylinder 310 is maximized, and uniform motion begins.
  • the third delivery cylinder 330 communicates with the space inside the hopper, and can be sucked through the delivery hole 201.
  • the piston of the third delivery cylinder 330 moves in the reverse direction, and the speed is recorded as a negative value;
  • the third delivery cylinder 330 can start to suck; as shown in the figure, starting from time 0,
  • the suction speed of the three delivery cylinders 330 gradually decreases as the piston movement speed decreases.
  • the suction time can be adjusted accordingly, for example, it can be extended to time t1, or extended to the time before the second distribution pipe 120 communicates with the third delivery cylinder 330.
  • the piston of the first delivery cylinder 310 moves forward at a uniform speed, and the concrete is uniformly pumped outward through the first distribution pipe 110; at the same time, the second distribution pipe 120 is rotated until the second distribution pipe and the 120
  • the third delivery cylinder 330 is in communication.
  • the state of the pumping system is as shown in Fig. 10.
  • This figure shows a perspective view of another state of the pumping system in the first embodiment.
  • the third delivery cylinder 330 is ready to wait for the pump material.
  • the second dispensing tube 120 should be rotated no later than t2 to allow the third delivery cylinder 330 to pump.
  • the piston of the first delivery cylinder 310 starts to decelerate.
  • the second distribution pipe 120 rotates and is not in communication with the second delivery cylinder 320, when the isolation is maintained, the second delivery cylinder 320 can be sucked, and the timing at which the second delivery cylinder 320 starts to suck is til, tl and There should be a certain time difference between the til, even if the second delivery cylinder 320 pauses between tl and til to prevent the second delivery cylinder 320 from pumping out the concrete.
  • the piston of the first delivery cylinder 310 is decelerated, and the piston of the third delivery cylinder 330 is accelerated forward from the last end, and the two are pumped outward through the first distribution pipe 110 and the second distribution pipe 120, respectively.
  • the acceleration of the piston of the first delivery cylinder 310 is equal to the acceleration of the piston of the third delivery cylinder 330 so that the speed at which the pumping system pumps concrete outward remains unchanged.
  • the piston speed of the first delivery cylinder 310 is reduced to zero, the piston speed of the third delivery cylinder 330 is maximized, and the uniform pumping of the material is started.
  • the second delivery cylinder 320 completes the suction; in this example, in order to extend the suction time, the maximum speed at which the second delivery cylinder 320 is sucked may be greater than that of the second delivery cylinder 320.
  • the maximum speed of the hour can be extended to any time between the first distribution pipe 110 and the second delivery cylinder 320.
  • the third delivery cylinder 330 is uniformly pumped concrete outward through the second distribution pipe 120; the first distribution pipe 110 is rotated until the first distribution pipe 110 and the second delivery cylinder 320 are in communication, and the second The delivery cylinder 320 is ready to wait for the pump material; the first distribution tube 110 should complete the rotation no later than t4.
  • the piston of the third transfer cylinder 330 starts to decelerate.
  • the first delivery cylinder 310 When the first distribution pipe 110 rotates and is not in communication with the first delivery cylinder 310, the first delivery cylinder 310 can be sucked when the isolation is maintained, and the timing at which the first delivery cylinder 310 starts to suck is t31, t3 and t31. There should be a certain time difference between them.
  • the piston of the third delivery cylinder 330 is decelerated, and the piston of the second delivery cylinder 320 is accelerated forward from the last end, and the two are pumped outward through the second distribution pipe 120 and the first distribution pipe 110, respectively.
  • the piston speed of the third delivery cylinder 330 is reduced to zero, the piston speed of the second delivery cylinder 320 is maximized, and the pumping of the uniform velocity is started.
  • the first delivery cylinder 310 completes the suction.
  • the second delivery cylinder 320 is uniformly pumped outwardly through the first distribution pipe 110; at the same time, the second distribution pipe 120 is rotated until the second distribution pipe 120 and the first delivery cylinder 310 are in communication with each other.
  • the first delivery cylinder 310 is ready to wait for the pump material; the second distribution tube 120 should complete the rotation no later than t6.
  • the second distribution pipe 120 rotates and is not in communication with the third delivery cylinder 330, when the isolation is maintained, the third delivery cylinder 330 can be sucked, and the timing at which the first delivery cylinder 310 starts to suck is t51, t5 and t51. There should be a certain time difference between them.
  • the piston of the second transfer cylinder 320 starts to decelerate, and the piston of the first transfer cylinder 310 starts to accelerate forward.
  • the predetermined dispensing pipe can be rotated according to a predetermined rule, and the pumping process of at least two conveying cylinders can be coordinated.
  • the pumping system can continuously and evenly pump concrete outwards, which not only eliminates the pumping interval during pumping, but also allows the pumping system to pump concrete evenly, reducing or avoiding material pulsation. Sexual flow further reduces vibrations due to concrete flow.
  • the pumping of the other tank can eliminate the pumping interval during pumping; when the pumping speed of one tank is reduced, the other tank starts to accelerate.
  • the pumping system can be used to pump concrete evenly outward.
  • the linkage between the movement relationship between the conveying cylinder and the distribution pipe it can be realized by a corresponding controller, for example, based on the predetermined movement speed of the conveying cylinder, controlling the movement speed of the other conveying cylinders according to a predetermined relationship and a predetermined movement law.
  • the rotation movement of the relevant distribution pipe according to a predetermined rule, the rotation of the distribution pipe is controlled based on the rotation of the conveying cylinder of the hooking speed pump; of course, the state of the predetermined distribution pipe can also be determined by the opposite method.
  • the movement of the predetermined delivery cylinder is controlled so that the pumping system can be operated by the above control method.
  • the pumping system is connected to the pumping or the uniform pumping is not limited to the above control method, so that the two dispensing tubes are respectively oscillated within an appropriate angle range, and continuous pumping or uniform pumping can also be realized.
  • the first distribution pipe 110 is swung between two extreme positions, and is communicated with the first delivery cylinder 310 and the second delivery cylinder 320 at two extreme positions, respectively, so that the second distribution pipe 120 is The two extreme positions are oscillated, and are respectively communicated with the third delivery cylinder 330 and the second delivery cylinder 320 at two extreme positions. It is also possible to realize the two delivery cylinders to coordinate the pump material or the suction material, so that the pumping system is continuous.
  • the swing of the distribution pipe can generate vibration due to the swing.
  • the time for positional switching between the conveying cylinder and the distribution pipe can be relatively long; and the existing lowering of the distribution valve pendulum cylinder impact or shortening the commutation time of the oscillating cylinder
  • the above pumping system can make the movement speed of the conveying cylinder and the distribution pipe relatively small, which can not only reduce the vibration generated by the movement of the conveying cylinder and the distribution pipe to the pumping system, but also can control and operate the pumping system. Convenience.
  • the distribution mechanism is not limited to including two distribution pipes, and more distribution pipes may be provided.
  • more delivery holes 201 are to be provided on the wear plate 200, and the number of the delivery holes 201 should be more than
  • the number of distribution tubes is such that one of the delivery cylinders can perform suction when at least two of the distribution tubes are in communication with the two delivery cylinders through the delivery holes. Ensuring that at least two of the distribution tubes are in communication with the two delivery cylinders provides a prerequisite for coordinating the operation of the two delivery cylinders to maintain continuous pumping or uniform pumping.
  • the pumping system and the pumping system distributing mechanism need appropriate driving devices, and the driving pumping cylinder may be an existing hydraulic cylinder, drive the distribution pipe for rotating motion, or may be an existing S valve swinging mechanism. It may be another driving device; in order to make the dispensing tube perform a circular rotary motion, the present invention also provides two other driving devices. Since the driving device can drive the above-described transmission shaft 410 or/and the transmission sleeve 420 to rotate, the transmission shaft 410 and the transmission sleeve 420 function as a transmission portion of the distribution mechanism; for convenience of description, the following is an example of driving the transmission shaft 410. A description of the drive unit.
  • FIG. 11 there is shown a structural view of a first type of drive means in the dispensing mechanism of the pumping system of the present invention.
  • the driving device comprises a swinging arm 520 and two swinging cylinders 510.
  • the swinging arm 520 is connected to the rear end of the driving shaft 410, and the other end is hingedly connected to one end of the swinging cylinder 510.
  • the other end of the swinging cylinder 510 is connected.
  • the hinge is hinged on a predetermined base (not shown) that is fixed relative to the wear plate 200; one end of the swing arm 520 and the rear end of the drive shaft 410 are driven by a ratchet mechanism 530.
  • the ratchet mechanism 530 includes an inner ratchet 531 fixed to the swing arm 520, a force transmitting rod 532 whose inner end is hinged to an edge portion of the drive shaft 410, and the outer end of the force transmitting rod 532 is held in contact with the inner ratchet 510.
  • the contact spring piece 533; the spring piece 533 is supported on the drive shaft 410 at the end, and the other end is supported at a position near the outer end of the force transmission rod 532.
  • the inner ratchet 510 causes the force transmitting rod 532 to rotate counterclockwise about the inner end hinge shaft against the force of the spring piece 533, and the swing arm 520 idles, and the drive shaft 410 does not follow.
  • the swinging arm 520 rotates; thus, the driving device can convert the rocking motion of the swinging arm 520 into a rotating motion, and the driving shaft 410 is circumferentially rotated by a predetermined motion law to cause the second distributing tube 120 to perform a circular motion.
  • Position conversion is performed between the three feed holes 201.
  • the ratchet mechanism 530 is not limited to the above structure, and power transmission can be realized by the external ratchet, which will not be described in detail herein.
  • FIG. 12 is a structural diagram of a second type of driving device in the dispensing mechanism of the pumping system of the present invention, and also a structural tube diagram when the driving device is in a driving state.
  • the drive unit includes a drive rack 620, a lock rack 640, a drive cylinder 650, and a lock cylinder 610.
  • the locking rack 630 is hinged to the predetermined base, and the other end is hinged to the rotating sleeve 630.
  • the hinge axis of the locking rack 630 is parallel to the axis of the transmission shaft 410, that is, parallel to the rotation axis 0-0, in order to save space.
  • the locking rack 630 is provided in an arc shape.
  • the lock cylinder 650 is hinged to the predetermined base, and the other end is hinged to the lock rack 640.
  • the direction of expansion and contraction of the lock cylinder 650 is perpendicular to the rotation axis 0-0.
  • One end of the driving cylinder 650 is mounted on a predetermined basis, and the other end is slidably engaged with the sliding sleeve 611, and is connected to the hinge of the driving rack 620 through the sliding sleeve 611, and the sliding sleeve 611 is fixed to a predetermined base.
  • the other end of the drive rack 620 is slidably engaged with the rotating sleeve 630 and extends in a direction perpendicular to the axis of rotation 0-0.
  • the predetermined base described above is relatively fixed to the wear plate 200.
  • the rear end of the drive shaft 410 has a drive tooth that is engageable with the teeth of the drive rack 620 and the lock rack 640 to engage the drive rack 620 and the lock rack 640.
  • the operating principle of the drive is as follows:
  • the drive device has two states, one is a drive state and the other is a lock state.
  • the driving state shown in FIG. 12 in which the locking cylinder 650 is shortened, and the locking rack 640 is separated from the driving teeth at the rear end of the transmission shaft 410; at this time, the driving rack 620 and the driving teeth at the rear end of the driving shaft 410 are driven.
  • the meshing force of the driving cylinder 610 is the same as the extending direction of the driving rack 620. In this state, since the sliding sleeve 611 limits the degree of freedom of the driving cylinder 610, when the driving cylinder 610 expands and contracts, the driving shaft 410 can be driven to rotate by the driving rack 620. Please refer to FIG.
  • FIG. 13 which is a structural tube diagram of the second driving device shown in FIG. 12 in a locked state.
  • the lock rack 640 rotates counterclockwise, and the lock rack 640 drives the drive rack 620 to rotate, so that the drive rack 620 is separated from the drive teeth at the rear end of the drive shaft 410;
  • the locking rack 640 is engaged with the driving teeth at the rear end of the transmission shaft 410 to lock the transmission shaft 410 to prevent the second distribution tube 120 from rotating under other forces.
  • the above-mentioned driving device is switched in two states.
  • the driving device can be driven, and the driving cylinder 610 is extended or shortened, and the driving shaft 410 is rotated 120.
  • the position conversion of the second distribution pipe 120 is achieved.
  • the second distribution tube 120 is required to remain stationary, so that the corresponding delivery cylinder is pumped, the driving device can be locked, the locking rack 640 is engaged with the driving teeth of the transmission shaft 410, and the second distribution tube 120 is maintained. Do not move.
  • the transition of the two states allows the drive shaft 410 to be rotated as intended.
  • FIG. 14 is a structural view of a third type of driving device provided by the present invention.
  • one end of the driving cylinder 610 is fixedly connected with the driving rack 620, and the other end is hingedly connected to the predetermined base, so that when the locking cylinder 650 is extended, The drive cylinder 610 and the drive rack 620 can be integrally rotated to change from the drive state to the lock state, thereby achieving the above object.
  • the concrete pump truck provided including the above pumping system also has a corresponding technical effect.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • General Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Reciprocating Pumps (AREA)

Abstract

L'invention porte sur un mécanisme de distribution d'un système de pompage, sur le système de pompage, sur un véhicule pour le pompage de béton et sur un procédé de commande du système de pompage. Le mécanisme de distribution du système de pompage comprend une plaque d'usure et au moins deux tuyaux de distribution. Les extrémités de sortie des tuyaux de distribution sont accouplées en rotation pour former un axe de rotation qui est dévié par rapport aux extrémités d'entrées de ces tuyaux, et des surfaces terminales des extrémités d'entrée coopèrent avec une surface d'usure de la plaque d'usure qui comprend au moins trois trous d'introduction de matière. L'extrémité d'entrée de chaque tuyau de distribution peut être mise en communication avec au moins deux trous d'introduction de matière lorsque les tuyaux de distribution tournent autour de l'axe de rotation. Pendant l'utilisation du mécanisme de distribution du système de pompage, des actions de pompage d'au moins deux cylindres de transport sont coordonnées par une rotation des tuyaux de distribution de sorte que le système de pompage puisse refouler de la matière à l'extérieur de façon continue. En outre, le système de pompage peut refouler de la matière à l'extérieur uniformément sous l'effet de la commande des mouvements relatifs de pistons dans les cylindres de transport, ce qui réduit ou évite les vibrations résultant de l'écoulement pulsé de la matière.
PCT/CN2011/075715 2010-08-25 2011-06-14 Véhicule pour le pompage de béton et procédé de commande de ce véhicule, système de pompage et mécanisme de distribution de ce système WO2012024964A1 (fr)

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CN201010266367XA CN101922429B (zh) 2010-08-25 2010-08-25 混凝土泵车及其控制方法、泵送系统及其分配机构
CN201010266367.X 2010-08-25

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CN102619717A (zh) * 2012-04-25 2012-08-01 中联重科股份有限公司 泵送分配机构、泵送装置及其控制方法、混凝土泵车
CN106088611A (zh) * 2016-06-22 2016-11-09 安庆海纳信息技术有限公司 一种建筑用混凝土地泵终端辅助浇筑装置

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CN101922429B (zh) * 2010-08-25 2012-07-25 三一重工股份有限公司 混凝土泵车及其控制方法、泵送系统及其分配机构
CN102505851B (zh) * 2011-09-28 2013-05-01 中联重科股份有限公司 一种混凝土泵车和用于混凝土泵车的泵送控制系统和方法
CN103161314B (zh) * 2011-12-12 2015-10-07 三一汽车制造有限公司 一种摇摆机构及泵送系统、混凝土设备
CN102518304B (zh) * 2012-01-10 2014-01-15 三一汽车制造有限公司 一种摇臂结构、摆摇机构、泵送系统及工程机械
CN102588243A (zh) * 2012-03-15 2012-07-18 三一重工股份有限公司 一种工程机械、物料泵送系统及其泵送方法
CN103423136A (zh) * 2012-05-15 2013-12-04 北京华德创业环保设备有限公司 一种工业固体泵输出切换管的切换结构
CN103016332B (zh) * 2012-12-19 2015-11-04 三一汽车制造有限公司 物料泵送系统、混凝土泵及消防泵车
CN106194207A (zh) * 2015-05-06 2016-12-07 四川睿铁科技有限责任公司 一种衬砌模板台车用混凝土配管方法及配管机
CN109139044B (zh) * 2018-07-17 2019-11-26 山东科技大学 一种矿用输送混凝土双柱塞泵防脉冲系统
CN109113763B (zh) * 2018-07-24 2019-09-24 山东科技大学 无脉冲湿喷机
CN115143072B (zh) * 2022-07-07 2023-03-21 中联重科股份有限公司 用于泵送系统的控制方法、处理器及泵送系统
CN115853794B (zh) * 2023-03-02 2023-05-26 四川省机械研究设计院(集团)有限公司 一种防空转水泵

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US3663129A (en) * 1970-09-18 1972-05-16 Leon A Antosh Concrete pump
FR2247628A1 (en) * 1973-10-12 1975-05-09 Italiana Forme Acciaio Compagn Three-way distributor for twin-cylinder concrete pump - has rotatable S-shaped pipe section connecting with one or other cylinder
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CN102619717A (zh) * 2012-04-25 2012-08-01 中联重科股份有限公司 泵送分配机构、泵送装置及其控制方法、混凝土泵车
CN106088611A (zh) * 2016-06-22 2016-11-09 安庆海纳信息技术有限公司 一种建筑用混凝土地泵终端辅助浇筑装置

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