阅读说明：本技术 一种新型臂架泵车泵送液压系统 (Novel boom pump truck pumping hydraulic system ) 是由 李绪省 于 2019-10-30 设计创作，主要内容包括：本发明属于泵车技术领域,涉及一种新型臂架泵车泵送液压系统包括摆摆缸齿轮泵、减压阀、溢流阀、单向阀、柱塞变量泵、摆动油缸、泵送油缸、电磁换向阀、主电液换向阀、第一液控换向阀、液控单向阀、控制油路电磁切换阀、蓄能器、泵车摆缸装置和第二液控换向阀。(The invention belongs to the technical field of pump trucks, and relates to a novel arm support pump truck pumping hydraulic system which comprises a swing cylinder gear pump, a pressure reducing valve, an overflow valve, a one-way valve, a plunger variable pump, a swing oil cylinder, a pumping oil cylinder, an electromagnetic reversing valve, a main electromagnetic reversing valve, a first hydraulic control reversing valve, a hydraulic control one-way valve, a control oil way electromagnetic switching valve, an energy accumulator, a pump truck swing cylinder device and a second hydraulic control reversing valve.)

1. A novel boom pump truck pumping hydraulic system is characterized in that a main structure comprises a swing cylinder gear pump, a pressure reducing valve, an overflow valve, a check valve, a plunger variable pump, a swing oil cylinder, a pumping oil cylinder, an electromagnetic directional valve, a main electromagnetic directional valve, a first hydraulic directional valve, a hydraulic control check valve, a control oil way electromagnetic directional valve, an energy accumulator, a pump truck swing cylinder device and a second hydraulic directional valve, wherein the swing cylinder gear pump, the pressure reducing valve, the overflow valve, the check valve, the plunger variable pump, the swing oil cylinder, the pumping oil cylinder, an engine, the electromagnetic directional valve, the main electromagnetic directional valve, the first hydraulic directional valve, the hydraulic control check valve, the second hydraulic directional valve, the control oil way electromagnetic directional valve and the energy accumulator are positioned in the pump truck swing cylinder device, the engine is fixedly installed in the pump truck swing cylinder device in a bolt fixing connection mode, and the engine provides power for the boom pump truck pumping hydraulic system, the oscillating cylinder gear pump is fixedly connected with the plunger variable pump through gear linkage, the engine is fixedly connected with the plunger variable pump through gear linkage, the oscillating cylinder gear pump is fixedly connected with the oscillating cylinder through circuit series connection, the oscillating cylinder gear pump can provide power source for the oscillating cylinder, the hydraulic control one-way valve is fixedly connected with the oscillating cylinder through circuit series connection, the plunger variable pump is fixedly connected with the pumping cylinder through circuit series connection, the plunger variable pump can provide power source for the pumping cylinder, the pressure reducing valve and the overflow valve are connected in parallel in the pumping cylinder circuit, the one-way valve, the electromagnetic directional valve, the main electromagnetic directional valve and the control oil circuit electromagnetic directional valve are respectively connected with the pressure reducing valve and the overflow valve in series in the pumping cylinder circuit, the one-way valve, the electromagnetic directional valve, the main electromagnetic directional valve and the control oil circuit electromagnetic directional valve are respectively matched with the pressure reducing valve and the overflow valve to realize the switching, the second hydraulic control reversing valve is connected in series in the swing oil cylinder circuit, the second hydraulic control reversing valve feeds oil and returns oil to the swing oil cylinder through a control oil path to control the moving direction of the swing oil cylinder, the first hydraulic control reversing valve is connected in series in the control pumping oil cylinder circuit, the first hydraulic control reversing valve feeds oil and returns oil to the pumping oil cylinder through the control oil path to control the moving direction of the pumping oil cylinder, the energy accumulator is fixedly connected with the one-way valve through a hydraulic pipeline, the second hydraulic control reversing valve is fixedly connected with the swing oil cylinder through a hydraulic pipeline, and the first hydraulic control reversing valve is fixedly connected with the pumping oil cylinder through a hydraulic pipeline.

The technical field is as follows:

the invention belongs to the technical field of pump trucks, and particularly relates to a novel boom pump truck hydraulic system.

Background art:

with the development of economic society, the building industry has also made great progress, and the modern construction means is constantly innovated, and concrete cantilever crane pump truck is the important production tool of building industry, and concrete cantilever crane pump truck for the modern construction means has the advantage of great delivery capacity, fast delivery speed, etc. has irreplaceable effect to quicken the construction progress, reduce construction cost. At present, the competitive focus of the cantilever type pump truck produced in China and abroad is the technical level of products, such as cantilever tilt cylinder impact, noise, stability and service life, when pumping concrete, the concrete pump truck respectively pushes concrete pistons in two conveying cylinders to reciprocate through two pumping main cylinders, the concrete pistons retract under the driving of the pumping main cylinders so as to suck the concrete in the conveying cylinders, meanwhile, the concrete piston in the other conveying cylinder extends under the driving of the pumping main cylinders so as to push out the concrete sucked in advance in the previous stroke, thereby completing the pumping, in order to ensure the continuity of the pumping, the two pumping main cylinders respectively drive one concrete piston to reciprocate and alternately reverse in the conveying cylinders, the concrete can be continuously pumped out, the slump of the pumped concrete of the ultra-high pressure concrete pump is low, the fluidity is poor, so that the pumping pressure is very high, the pumping difficulty is high, and the concrete is easy to swing and block the pipe carelessly, so that the construction process is influenced; the prior art is basically two directions, one: the hydraulic control hydraulic system realizes pumping through a single pump power unit and a control valve group. II, secondly: an electric control hydraulic system is adopted, and the reversing signal switching is realized through a signal switch, so that the pumping is realized. The two schemes are mature in industry, meanwhile, the cost difference is very large, and meanwhile, the phenomenon that pumping cannot normally work in the process of changing the full stroke and the small displacement of a hydraulic control system also exists, so that a novel boom pump truck hydraulic system is sought and designed to solve the problem that pumping cannot normally work in the process of changing the full stroke and the small displacement of a pump truck so as to meet stable operation under various working conditions and improve the performance of the whole machine, meanwhile, the cost control is very low, and the market competition advantage is very huge.

The invention content is as follows:

the invention aims to overcome the defects and shortcomings of the prior art, and provides a novel boom pump truck hydraulic system which can solve the problem of full stroke variable displacement under the condition of very low cost so as to meet the stable operation under various working conditions, improve the performance of the whole machine and solve the industrial bottleneck.

In order to achieve the purpose, the invention relates to a novel pump truck pumping hydraulic system, which comprises a main structure comprising a tilt cylinder gear pump, a pressure reducing valve, an overflow valve, a one-way valve, a plunger variable pump, a tilt cylinder, a pumping cylinder, an electromagnetic directional valve, a main electromagnetic directional valve, a first hydraulic directional valve, a hydraulic one-way valve, a control oil path electromagnetic directional valve, an energy accumulator, a pump truck tilt cylinder device and a second hydraulic directional valve, wherein the tilt cylinder gear pump, the pressure reducing valve, the overflow valve, the one-way valve, the plunger variable pump, the tilt cylinder, the pumping cylinder, an engine, the electromagnetic directional valve, the main electromagnetic directional valve, the first hydraulic directional valve, the hydraulic one-way valve, the second hydraulic directional valve, the control oil path electromagnetic directional valve and the energy accumulator are positioned in the pump truck tilt cylinder device, the engine is fixedly installed in the pump truck tilt cylinder device in a bolt fixing connection mode, and the engine provides power for the boom, the oscillating cylinder gear pump is fixedly connected with the plunger variable pump through gear linkage, the engine is fixedly connected with the plunger variable pump through gear linkage, the oscillating cylinder gear pump is fixedly connected with the oscillating cylinder through circuit series connection, the oscillating cylinder gear pump can provide power source for the oscillating cylinder, the hydraulic control one-way valve is fixedly connected with the oscillating cylinder through circuit series connection, the plunger variable pump is fixedly connected with the pumping cylinder through circuit series connection, the plunger variable pump can provide power source for the pumping cylinder, the pressure reducing valve and the overflow valve are connected in parallel in the pumping cylinder circuit, the one-way valve, the electromagnetic directional valve, the main electromagnetic directional valve and the control oil circuit electromagnetic directional valve are respectively connected with the pressure reducing valve and the overflow valve in series in the pumping cylinder circuit, the one-way valve, the electromagnetic directional valve, the main electromagnetic directional valve and the control oil circuit electromagnetic directional valve are respectively matched with the pressure reducing valve and the overflow valve to realize the switching, the second hydraulic control reversing valve is connected in series in the swing oil cylinder circuit, the second hydraulic control reversing valve feeds oil and returns oil to the swing oil cylinder through a control oil path to control the moving direction of the swing oil cylinder, the first hydraulic control reversing valve is connected in series in the control pumping oil cylinder circuit, the first hydraulic control reversing valve feeds oil and returns oil to the pumping oil cylinder through the control oil path to control the moving direction of the pumping oil cylinder, the energy accumulator is fixedly connected with the one-way valve through a hydraulic pipeline, the second hydraulic control reversing valve is fixedly connected with the swing oil cylinder through a hydraulic pipeline, and the first hydraulic control reversing valve is fixedly connected with the pumping oil cylinder through a hydraulic pipeline.

Compared with the prior art, the invention has the advantages that 1, the one-way valve can realize one-way flow of an oil way in a high-pressure state, prevent backflow of the oil way and improve the stability of the system under the high-pressure working condition, 2, a double-loop design is adopted, the full-stroke variable displacement of the pump truck is met aiming at different working conditions, the full-stroke variable displacement of the pump truck can be solved, the stable operation under various working conditions is met, and the performance of the whole machine is improved. Meanwhile, the reliability and the stability of the whole system are improved. 3. The hydraulic control pilot oil control logic is adopted, and the cross signal logic is adopted, so that the main body is simple, the design concept is ingenious, the use is safe and convenient, the application effect is friendly, and the market prospect is wide.

Description of the drawings:

fig. 1 is a schematic diagram of the structural principle of the novel pump truck hydraulic system.

In the figure: the hydraulic control system comprises a cylinder oscillating gear pump 1, a pressure reducing valve 2, an overflow valve 3, a one-way valve 4, a plunger variable pump 5, an oscillating oil cylinder 6, a pumping oil cylinder 7, an engine 8, an electromagnetic directional valve 9, a main electromagnetic directional valve 10, a first hydraulic directional valve 11, a hydraulic control one-way valve 12, an oil way control electromagnetic directional valve 13, an energy accumulator 14, a pump truck cylinder oscillating device 15 and a second hydraulic directional valve 16.

The specific implementation mode is as follows:

the invention is further described by the following examples in conjunction with the accompanying drawings.

Example 1:

in order to achieve the purpose, the main structure of the pump truck hydraulic system comprises a tilt cylinder gear pump 1, a pressure reducing valve 2, an overflow valve 3, a one-way valve 4, a plunger variable pump 5, a swing cylinder 6, a pumping cylinder 7, an engine 8, an electromagnetic directional valve 9, a main electromagnetic hydraulic directional valve 10, a first hydraulic directional control valve 11, a hydraulic control one-way valve 12, a control oil path electromagnetic directional valve 13, an energy accumulator 14, a pump truck tilt cylinder device 15 and a second hydraulic directional control valve 16, wherein the tilt cylinder gear pump 1, the pressure reducing valve 2, the overflow valve 3, the one-way valve 4, the plunger variable pump 5, the swing cylinder 6, the pumping cylinder 7, the engine 8, the electromagnetic directional valve 9, the main electromagnetic directional control valve 10, the first hydraulic directional control valve 11, the hydraulic control one-way valve 12, the second hydraulic directional control valve 16, the oil path electromagnetic directional valve 13 and the energy accumulator 14 are positioned inside the pump truck tilt cylinder device 15, the engine 8 is fixedly installed inside the pump truck tilt cylinder device 15 in a, the engine 8 provides power for a hydraulic pumping system of the arm support pump truck, the tilt cylinder gear pump 1 is fixedly connected with the plunger variable pump 5 through gear linkage, the engine 8 is fixedly connected with the plunger variable pump 5 through gear linkage, the tilt cylinder gear pump 1 is fixedly connected with the swing oil cylinder 6 through circuit series, the tilt cylinder gear pump 1 can provide power for the swing oil cylinder 6, the hydraulic control one-way valve 12 is fixedly connected with the swing oil cylinder 6 through circuit series, the plunger variable pump 5 is fixedly connected with the pumping oil cylinder 7 through circuit series, the plunger variable pump 5 can provide power for the pumping oil cylinder 7, the pressure reducing valve 2 and the overflow valve 3 are connected in parallel in a circuit of the pumping oil cylinder 7, the one-way valve 4, the electromagnetic directional valve 9, the main electromagnetic directional valve 10 and the control oil path electromagnetic directional valve 13 are respectively connected with the pressure reducing valve 2 and the overflow valve 3 in a circuit of the pumping oil cylinder 7 in series, The main hydraulic directional control valve 10 and the control oil path electromagnetic switching valve 13 are respectively matched with the pressure reducing valve 2 and the overflow valve 3 to realize the switching of positive pump material beating and reverse pump material sucking of a pump truck swing cylinder device 15, the second hydraulic directional control valve 16 is connected in series in a swing oil cylinder 6 circuit, the second hydraulic directional control valve 16 feeds oil and returns oil to the swing oil cylinder 6 through a control oil path to control the moving direction of the swing oil cylinder 6, the first hydraulic directional control valve 11 is connected in series in a control pumping oil cylinder 7 circuit, the first hydraulic directional control valve 11 feeds oil and returns oil to the pumping oil cylinder 7 through the control oil path to control the moving direction of the pumping oil cylinder 7, the energy accumulator 14 is fixedly connected with the one-way valve 4 through a hydraulic pipeline, the second hydraulic directional control valve 16 is fixedly connected with the swing oil cylinder 6 through a hydraulic pipeline, and the first hydraulic directional control valve 11 is.

The pump truck tilt cylinder device 15 related to the embodiment is made of rigid materials and welded, and is good in toughness and overall performance and low in processing and manufacturing cost; the oscillating cylinder gear pump 1, the pressure reducing valve 2, the overflow valve 3, the check valve 4, the plunger variable pump 5, the oscillating cylinder 6, the pumping cylinder 7, the engine 8, the electromagnetic directional valve 9, the main electromagnetic directional valve 10, the first hydraulic directional valve 11, the hydraulic directional check valve 12, the control oil path electromagnetic directional valve 13, the energy accumulator 14 and the second hydraulic directional valve 16 are commercially available products, and can be directly purchased in the market, and the oscillating cylinder gear pump is convenient and quick.

When the hydraulic system of the pump truck related to the embodiment is used, the engine 8 is started to provide power for the hydraulic system of the arm support pump truck, the engine 8 drives the cylinder gear pump 1, the pressure output to pressure oil of the swing cylinder gear pump 1 is controlled by the overflow valve 3, the pressure oil is stored in the energy accumulator 14 through the one-way valve 4, the pressure oil stored in the energy accumulator 14 provides a sufficient oil source for the swing oil cylinder 6 during high-speed reversing, and when the pumping oil cylinder 7 acts, the energy accumulator 14 returns to an energy charging state to store the pressure oil again; when the pumping oil cylinder 7 reaches a designated position, a pressure signal is transmitted to the hydraulic control one-way valve 12, the second hydraulic control reversing valve 16 controls the oil inlet and the oil return of the swing oil cylinder 6 through a control oil path, the moving direction of the swing oil cylinder 6 is controlled, the reversing of the oil path of the pump truck swing cylinder device 15 is completed, the pump truck swing cylinder device 15 performs reverse pump material suction, the main hydraulic control reversing valve 10 and the control oil path electromagnetic switching valve 13 are used for switching the signal oil when the electromagnetic reversing valve 9 obtains a reverse pump material suction command, so that the swing oil cylinder 6 cooperates with the pump truck swing cylinder device 15 to perform reverse pump material suction, when the swing oil cylinder 6 is switched to the designated position, the pressure signal is transmitted to the first hydraulic control reversing valve 11 through a signal oil port on the swing oil cylinder 6, the first reversing valve 11 performs oil inlet and oil return on the pumping oil cylinder 7 through the control oil path, the moving direction of the pumping oil cylinder 7 is, the pump truck oscillating cylinder device 15 is enabled to carry out positive pump material beating, the one-way valve 4 can realize one-way flow of an oil way under a high pressure state through control over the energy accumulator 14, backflow of the oil way is prevented, stability of a system under a high pressure working condition is improved, full stroke timely switching of the oscillating cylinder can still be realized through minimum discharge capacity under a normal material beating working condition, the first hydraulic control reversing valve 11, the second hydraulic control reversing valve 16 and pilot control oil adopted for pushing are used for pushing, the pumping oil cylinder 7 serves as a signal control input port, when an oil cylinder piston runs to a set position, high-pressure cavity hydraulic oil pushes the second hydraulic control reversing valve 16 through a pipeline for reversing, and when the oscillating cylinder 6 runs to the set position, logic control pressure is given to the first hydraulic control reversing valve 11. The energy accumulator 14 has the function that after the second hydraulic control reversing valve 16 reverses, the energy accumulator 14 provides enough pressure and flow to the swing oil cylinder 6, and the rapid and efficient swing in place is guaranteed.