WO2013023454A1 - 一种泵送装置及工程机械 - Google Patents

一种泵送装置及工程机械 Download PDF

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Publication number
WO2013023454A1
WO2013023454A1 PCT/CN2012/074041 CN2012074041W WO2013023454A1 WO 2013023454 A1 WO2013023454 A1 WO 2013023454A1 CN 2012074041 W CN2012074041 W CN 2012074041W WO 2013023454 A1 WO2013023454 A1 WO 2013023454A1
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WIPO (PCT)
Prior art keywords
pumping
pumping cylinder
cylinder
piston
distribution valve
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Application number
PCT/CN2012/074041
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English (en)
French (fr)
Inventor
袁栋
陈金龙
沈明星
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 WO2013023454A1 publication Critical patent/WO2013023454A1/zh

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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
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
    • F04B9/10—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid
    • F04B9/109—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers
    • F04B9/1095—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers having two or more pumping chambers in series
    • 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
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
    • F04B9/10—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid
    • F04B9/109—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers
    • F04B9/117—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers the pumping members not being mechanically connected to each other
    • F04B9/1172—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers the pumping members not being mechanically connected to each other the movement of each pump piston in the two directions being obtained by a double-acting piston liquid motor

Definitions

  • the present invention relates to the field of construction machinery, and in particular to a pumping device and a construction machine.
  • the displacement cannot be adjusted not only when the cam is driven, but also when the pipe is clogged.
  • the object of the present invention is to provide a pumping device which can adjust the displacement, relieve the pressure shock, avoid the defects that the spring cannot be recovered, and can effectively ensure the pumping. Continuity.
  • the pumping device of the utility model comprises:
  • a first pumping cylinder and a second pumping cylinder a first piston is disposed in the first pumping cylinder, and a second piston is disposed in the second pumping cylinder;
  • the first pumping cylinder is in communication with a pipe between the feed port and the discharge port, and the second pumping cylinder is in communication with the discharge port;
  • the first distribution valve being disposed on a pipe between the feed port and the first pumping cylinder;
  • a second distribution valve the second distribution valve being disposed on a pipe between the first pumping cylinder and the second pumping cylinder;
  • the hydraulic oil circuit, the first pumping cylinder and the second pumping cylinder are both supplied with oil by a hydraulic oil passage, thereby driving the first piston and the second piston to reciprocate in opposite directions.
  • the hydraulic oil path is provided:
  • a reversing valve comprising a first interface and a second interface
  • a first flow dividing device the first end of the first flow dividing device is connected to the first interface, and the second end of the first flow dividing device is respectively connected to the rodless cavity of the first pumping cylinder and the rodless of the second pumping cylinder
  • a second diverting device the first end of the second diverting device is connected to the second interface, and the second end of the second diverting device is respectively connected to the rodless cavity of the first pumping cylinder and the second pumping cylinder
  • the first flow dividing device and the second flow dividing device are a diverter valve or a splitter motor.
  • the first distribution valve and the second distribution valve are both ball valves
  • the feeding port is located below the first pumping cylinder
  • the discharging port is located above the first pumping cylinder.
  • the discharge amount of the first pumping cylinder is larger than the discharge amount of the second pumping cylinder.
  • the utility model also provides a construction machine, which comprises the aforementioned pumping device.
  • the construction machine is specifically a mortar pump.
  • the second pumping cylinder pushes the material outward during the suction process of the first pumping cylinder, and the second pumping cylinder sucks the material during the pushing process of the first pumping cylinder, thereby Ensure continuity of discharge during pumping.
  • the second pumping cylinder oil pressure is also increased, and the spring type pumping cylinder is not generated, and the spring is stuck and lost when the outlet pressure is too large.
  • the defect of the compensation function is good in pumping continuity; in addition, the first pumping cylinder and the second pumping cylinder of the utility model are all hydraulically driven, and overflow when the pressure is too large, which can effectively alleviate the external rigid impact, The cam type pumping cylinder will be defective in damaging the engine, effectively protecting the engine and improving the service life of the engine.
  • the hydraulic oil circuit and the sealing member of the utility model are simple, compact and small in size, not only A variety of arrangements can be made on the construction machine, and also facilitate the repair and replacement of the various components, in particular the dispensing valve.
  • FIG. 1 is a schematic structural view of a pumping device according to an embodiment of the present invention.
  • the pumping device of the present invention includes at least a first pumping cylinder 1, a second pumping cylinder 2, and a second pumping cylinder.
  • Feed port 4 discharge port 5
  • first distribution valve VI first distribution valve VI
  • second distribution valve V2 second distribution valve V2
  • hydraulic oil circuit first distribution valve VI
  • the first pumping cylinder 1 of the present invention is provided with a first piston 31, and the second pumping cylinder 2 is provided with a second piston 32 for pushing and sucking by driving the movement of each piston.
  • the first piston 31 and the second piston 32 are sucked when moving to the right, and are pushed when moving to the left.
  • the size of the piston head is matched to the cylinder and its construction is referenced to the prior art.
  • the sizes of the first pumping cylinder 1 and the second pumping cylinder 2 may be the same or different, and the present invention is not limited thereto.
  • the pumping device of the present invention can adopt a master-slave structure, the first pumping cylinder 1 plays a major role in the pumping flow rate of the pumping device, and the second pumping cylinder 2 pumps the pumping device.
  • the pumping continuity of the device serves as a compensating action, i.e., the first pumping cylinder 1 is the primary cylinder and the second pumping cylinder 2 is the compensation cylinder.
  • the diameter of the first pumping cylinder 1 is larger than the diameter of the second pumping cylinder 2, and more preferably the diameter of the second pumping cylinder 2 is about half of the diameter of the first pumping cylinder 1.
  • the discharge amount of the first pumping cylinder 1 is larger than the discharge amount of the second pumping cylinder 2.
  • the present invention is applied to the above-described master-slave single-cylinder piston pump (only one place, a person skilled in the art can also set a similar third on the pipe between the feed port 4 and the discharge port 5).
  • the pumping cylinder, the fourth pumping cylinder or more pumping cylinders form a multi-cylinder pumping device of the more probable manner of the present invention.
  • the pumping device of the utility model pumps the material from the feed port 4 to the discharge port 5, the first pumping cylinder 1 communicates with the pipeline between the feed port 4 and the discharge port 5, and the second pumping cylinder 2 Connected to the outlet 5 Pass.
  • a first distribution valve VI and a second distribution valve V2 are further disposed on the pipeline between the inlet port 4 and the discharge port 5.
  • the first distribution valve VI is disposed on the conduit between the feed port 4 and the first pumping cylinder 1
  • the second distribution valve V2 is disposed on the conduit between the first pumping cylinder 1 and the second pumping cylinder 2 .
  • the first dispensing valve VI is opened, the first pumping cylinder 1 is sucking, the second dispensing valve V2 is closed, and the second pumping cylinder 2 is pushing; in another working process, the first dispensing valve VI When the first pumping cylinder 1 is pushed, the second dispensing valve V2 is opened, and the second pumping cylinder 2 is sucked. That is, during the entire operation, the first piston 31 and the second piston 32 reciprocate in opposite directions.
  • the first distribution valve VI and the second distribution valve V2 may be valves of various structures, such as a solenoid valve, a butterfly valve, etc., and the present invention is not limited thereto.
  • the first dispensing valve VI and the second dispensing valve V2 are both ball valves, and the opening or closing of the ball valve may be determined by the pressure generated during the pushing or sucking process of the first pumping cylinder 1.
  • the first pumping cylinder 1 sucks, the ball of the first dispensing valve VI is sucked up, and the ball of the second dispensing valve V2 is sucked; during the pushing of the first pumping cylinder 1, the first dispensing valve The sphere of the VI is pushed down and the sphere of the second dispensing valve V2 is pushed up.
  • the feed port 4 is located below the first pumping cylinder 1
  • the discharge port 5 is located above the first pumping cylinder 1.
  • the first pumping cylinder 1 and the second pumping cylinder 2 are both supplied with oil by a hydraulic oil passage, thereby driving the first piston 31 and the second piston 32 to reciprocate in opposite directions to each other, through the first piston 31 and the second piston.
  • the coordinated operation of 31 ensures pumping continuity.
  • the first pumping cylinder 1 and the second pumping cylinder 2 may be supplied with oil by the same oil passage, or may be oiled by different oil passages.
  • the present invention is not limited thereto, and the former is preferred.
  • the utility model is provided with a reversing valve V3, a first diverting device 6 and a second diverting device 7 on the hydraulic oil line.
  • the reversing valve V3 is used for realizing the conversion of the hydraulic oil flow direction, and may be a two-way four-way reversing valve and the like.
  • the reversing valve V3 includes a first interface and a second interface on the oil discharge side thereof, and the structure thereof can be referred to current technology.
  • the first end of the first flow dividing device 6 is connected to the first port of the reversing valve V3, and the second end of the first diverting device 6 is connected to the rod chamber of the first pumping cylinder 1 and the second pumping cylinder 2, respectively.
  • the first flow dividing device 6 and the second flow dividing device 7 respectively include a first end and a second end, at the first end thereof as an inlet or an outlet of the hydraulic oil, and at the second end thereof, a shunting action is possible, and the second end can be proportioned A split of the hydraulic oil is achieved.
  • the first flow dividing device 6 and the second flow dividing device 7 may be of a structure such as a diverter valve or a splitter motor.
  • the second end of the first flow dividing device 6 is oiled, and the second end of the first flow dividing device 6 returns oil, then the first pumping cylinder 1 sucks the material, and the second pumping cylinder 2 pushes the material;
  • the second end of the first diverting device 6 returns oil, and the second end of the first diverting device 6 is oiled, then the first pumping cylinder 1 pushes the material, and the second pumping cylinder 2 sucks.
  • the pumping continuity can be ensured by the reciprocating movement of the first piston 31 and the second piston 32 in the opposite directions.
  • the present invention also provides a mechanical machine including the aforementioned pumping device.
  • a mechanical machine including the aforementioned pumping device.
  • Other structures of the construction machine refer to the prior art, and are not described herein again.
  • the engineering machine may be a mortar pump, a mortar machine or the like, preferably a mortar pump.
  • the second pumping cylinder pushes the material outward during the suction process of the first pumping cylinder, and the second pumping cylinder during the pushing process of the first pumping cylinder Suction, so as to ensure the continuity of discharge during pumping.
  • the utility model has the following advantages:
  • the first pumping cylinder and the second pumping cylinder of the utility model are all driven by hydraulic pressure, and overflow when the pressure is too large, which can effectively alleviate external rigid impact, and does not cause defects of the cam type pumping cylinder dying and damaging the engine. , effectively protects the engine and improves the service life of the engine.
  • the hydraulic oil circuit and the sealing component of the utility model have the advantages of single, compact and small volume, and can realize various arrangements on the construction machine, and also facilitate the maintenance and replacement of various components, especially the distribution valve. Therefore, the beneficial effects of the present invention are obvious.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Reciprocating Pumps (AREA)

Abstract

一种泵送装置，包括：第一泵送缸(1)和第二泵送缸(2)，所述第一泵送缸(1)内设置有第一活塞(31)，所述第二泵送缸(2)内设置有第二活塞(32)；进料口(4)和出料口(5)，所述第一泵送缸(1)与进料口(4)和出料口(5)之间的管道连通，所述第二泵送缸与出料口(5)连通；第一分配阀(VI)，所述第一分配阀(VI)设置在进料口(4)和第一泵送缸(1)之间的管道上；第二分配阀(V2)，所述第二分配闽(V2)设置在第一泵送缸(1)和第二泵送缸(2)之间的管道上；液压油路，所述第一泵送缸(1)和第二泵送缸(2)均由液压油路供油，从而驱动所述第一活塞(31)和第二活塞(32)相互反方向的往复运动。还公开了一种包括该泵送装置的工程机械。该泵送装置具有泵送连续性好、有利于保护发动机、结构紧凑等优点。

Description

一种泵送装置及工程;^ 本申请要求于 2011 年 08 月 15 日提交中国专利局、 申请号为 201120297159.6、 实用新型名称为 "一种泵送装置及工程机械"的中国专利 申请的优先权， 其全部内容通过引用结合在本申请中。
技术领域 本实用新型涉及工程机械领域， 具体地说， 涉及一种泵送装置及工程 机械。
背景技术
在泵送式工程机械中， 需要保证泵送过程中物料的连续性。 以砂浆泵 为例， 连续性对砂浆泵的喷涂效果有重要影响。 目前， 砂浆泵大多采用弹 簧或凸轮驱动补偿缸的结构来实现连续泵送， 此种结构在一定程度上能实 现泵送连续。
对于凸轮式补偿缸结构而言， 不仅在凸轮驱动时无法调节排量， 而且 在管道中堵塞时， 会形成较大的压力沖击。
对于弹簧式补偿缸结构而言， 当出口压力大时， 弹簧无法及时复原， 不能及时补料， 补偿缸失去了对泵送的补偿作用， 从而影响泵送连续性。
实用新型内容
为了克服现有技术的上述缺陷和不足， 本实用新型的目的在于提供一 种泵送装置， 该装置可以调节排量、 緩解压力沖击， 避免了弹簧无法复原 的缺陷， 并可以有效保证泵送连续性。
本实用新型的泵送装置包括：
第一泵送缸和第二泵送缸， 所述第一泵送缸内设置有第一活塞， 所述 第二泵送缸内设置有第二活塞；
进料口和出料口，所述第一泵送缸与进料口和出料口之间的管道连通， 所述第二泵送缸与出料口连通；
第一分配阀， 所述第一分配阀设置在进料口和第一泵送缸之间的管道 上；
第二分配阀， 所述第二分配阀设置在第一泵送缸和第二泵送缸之间的 管道上； 液压油路，所述第一泵送缸和第二泵送缸均由液压油路供油，从而驱 动所述第一活塞和第二活塞相互反方向的往复运动。
作为上述技术方案的优选， 在所述液压油路上设置：
换向阀， 所述换向阀包括第一接口和第二接口；
第一分流装置， 所述第一分流装置的第一端连接第一接口， 所述第一 分流装置的第二端分别连接第一泵送缸的有杆腔和第二泵送缸的无杆腔； 第二分流装置， 所述第二分流装置的第一端连接第二接口， 所述第二 分流装置的第二端分别连接第一泵送缸的无杆腔和第二泵送缸的有杆腔。
作为上述技术方案的优选， 第一分流装置和第二分流装置为分流阀或 分流马达。
作为上述技术方案的优选， 所述第一分配阀和第二分配阀均为球阀， 所述进料口位于第一泵送缸下方， 所述出料口位于第一泵送缸上方。
作为上述技术方案的优选， 所述第一泵送缸的排浆量大于所述第二泵 送缸的排浆量。
本实用新型还提供一种工程机械， 该工程机械包括前述的泵送装置。 作为上述技术方案的优选， 所述工程机械具体为砂浆泵。
本实用新型的泵送装置及工程机械， 第一泵送缸吸料过程中第二泵送 缸向外推料， 而第一泵送缸推料过程中第二泵送缸吸料， 从而可以保证泵 送过程中出料的连续性。 与现有技术相比， 本实用新型在灰浆出口压力增 大时， 第二泵送缸油压也随之增大， 不会产生弹簧式泵送缸因出口压力过 大时弹簧卡死而失去补偿作用的缺陷， 泵送连续性好； 此外， 本实用新型 的第一泵送缸和第二泵送缸全部采用液压驱动， 在压力过大时溢流， 能有 效緩解外部刚性沖击， 不会产生凸轮式泵送缸憋死损坏发动机的缺陷， 有 效地保护了发动机， 提高了发动机的使用寿命； 而且， 本实用新型的液压 油路及密封部件结构筒单、 紧凑， 体积较小， 不仅可以在工程机械上实现 多种布置方式， 而且也有利于各部件尤其是分配阀的维修及更换。
附图说明
为了更清楚地说明本实用新型实施例或现有技术中的技术方案， 下面 将对实施例或现有技术描述中所需要使用的附图作筒单地介绍， 显而易见 地， 下面描述中的附图仅仅是本实用新型的一些实施例， 对于本领域普通 技术人员来讲， 在不付出创造性劳动性的前提下， 还可以根据这些附图获 得其他的附图。
图 1是本实用新型一实施例的泵送装置的结构示意图。
具体实施方式
下面将结合本实用新型实施例中的附图， 对本实用新型实施例中的技 术方案进行清楚、 完整地描述， 显然， 所描述的实施例仅仅是本实用新型 一部分实施例， 而不是全部的实施例。 基于本实用新型中的实施例， 本领 域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例， 都属于本实用新型保护的范围。
图 1所示是本实用新型一实施例的泵送装置的结构示意图， 从图中可 以看出， 本实用新型的泵送装置至少包括第一泵送缸 1、 第二泵送缸 2、 进 料口 4、 出料口 5、 第一分配阀 VI、 第二分配阀 V2及液压油路。
本实用新型的第一泵送缸 1内设置有第一活塞 31 , 第二泵送缸 2内设 置有第二活塞 32, 通过驱动各活塞的移动实现推料和吸料。 在图 1所示的 结构示意图中， 第一活塞 31和第二活塞 32向右移动时吸料， 向左移动时 推料。 活塞头的尺寸与缸体相匹配， 其结构参考现有技术。 第一泵送缸 1 和第二泵送缸 2的尺寸可以相同，也可以不同，本实用新型并不受限于此。
为了减少对现有结构的改动， 本实用新型的泵送装置可以采用主从式 结构， 第一泵送缸 1对泵送装置的排浆流量起主要作用， 第二泵送缸 2对 泵送装置的泵送连续性起补偿作用， 即第一泵送缸 1为主缸， 第二泵送缸 2为补偿缸。 优选第一泵送缸 1的直径大于第二泵送缸 2的直径， 更优选 第二泵送缸 2的直径约为第一泵送缸 1直径的一半。 此时， 第一泵送缸 1 的排浆量大于第二泵送缸 2的排浆量。
应当清楚， 本实用新型除了应用于上述主从式单缸活塞泵（仅有一个 应地， 本领域技术人员还可以在进料口 4和出料口 5之间的管道上设置类 似的第三泵送缸、 第四泵送缸或更多的泵送缸， 以形成本实用新型更多可 能方式的多缸式泵送装置。
本实用新型的泵送装置将物料从进料口 4泵送至出料口 5, 第一泵送 缸 1与进料口 4和出料口 5之间的管道连通， 第二泵送缸 2与出料口 5连 通。 为了实现第一活塞 31和第二活塞 32对物料的有效吸料和推料， 在进 料口 4和出料口 5之间的管路上还设置有第一分配阀 VI和第二分配阀 V2。 其中第一分配阀 VI设置在进料口 4和第一泵送缸 1之间的管道上， 第二 分配阀 V2设置在第一泵送缸 1和第二泵送缸 2之间的管道上。
在一个工作过程中， 第一分配阀 VI打开， 第一泵送缸 1吸料， 第二 分配阀 V2关闭， 第二泵送缸 2推料； 在另一个工作过程中， 第一分配阀 VI关闭， 第一泵送缸 1推料， 第二分配阀 V2打开， 第二泵送缸 2吸料。 即在整个工作过程中， 第一活塞 31和第二活塞 32之间进行相互反方向的 往复运动。 其中第一分配阀 VI和第二分配阀 V2可以是各种结构的阀门， 如电磁阀、 蝶形阀等， 本实用新型并不受限于此。 优选第一分配阀 VI 和 第二分配阀 V2均为球阀， 球阀的打开或关闭可由第一泵送缸 1推料或吸 料过程中产生的压力决定。 在第一泵送缸 1吸料时， 第一分配阀 VI的球 体被吸起， 而第二分配阀 V2的球体被吸下； 在第一泵送缸 1推料过程中， 第一分配阀 VI的球体被推下， 而第二分配阀 V2的球体被推起。 此时， 为 了实现各部件之间的合理设置， 优选进料口 4位于第一泵送缸 1下方， 出 料口 5位于第一泵送缸 1上方。
第一泵送缸 1和第二泵送缸 2均由液压油路供油， 从而驱动所述第一 活塞 31和第二活塞 32相互反方向的往复运动，通过第一活塞 31和第二活 塞 31 的协调作业， 可以保证泵送连续性。 第一泵送缸 1和第二泵送缸 2 之间可以采用同一油路供油， 也可以采用不同油路供油， 本实用新型并不 受限于此， 优选前者。 采用上述技术方案后， 本实用新型不会产生现有技 术中弹簧式泵送缸因出口压力过大时弹簧卡死而失去补偿作用的缺陷， 也 不会产生凸轮式泵送缸憋死损坏发动机的缺陷。
本领域技术人员可以采用多种可能的液压油路设置方式， 实现第一泵 送缸 1和第二泵送缸 2之间相互交替的往复运动。 作为一个实施例， 本实 用新型在液压油路上设置有换向阀 V3、第一分流装置 6和第二分流装置 7。 其中， 换向阀 V3用于实现液压油流向的转换， 其可以为两位四通换向阀 等结构， 换向阀 V3在其出油侧包括第一接口和第二接口， 其结构可以参 考现有技术。 第一分流装置 6的第一端连接换向阀 V3的第一接口， 第一 分流装置 6的第二端分别连接第一泵送缸 1的有杆腔和第二泵送缸 2的无 杆腔； 第二分流装置 7的第一端连接换向阀 V3的第二接口， 第二分流装 置 7的第二端分别连接第一泵送缸 1的无杆腔和第二泵送缸 2的有杆腔。
第一分流装置 6和第二分流装置 7分别包括第一端和第二端， 在其第 一端作为液压油的入口或出口， 在其第二端实现分流作用， 在第二端可以 按比例实现液压油的分流。 第一分流装置 6和第二分流装置 7可以为分流 阀或分流马达等结构。
在一个工作过程中， 第一分流装置 6的第二端出油， 第一分流装置 6 的第二端回油， 则第一泵送缸 1吸料， 第二泵送缸 2推料； 在另一个工作 过程中， 第一分流装置 6的第二端回油， 第一分流装置 6的第二端出油， 则第一泵送缸 1推料， 第二泵送缸 2吸料。通过上述第一活塞 31和第二活 塞 32之间相互反方向的往复运动， 可以保证泵送连续性。
除了前述泵送装置外， 本实用新型还提供一种包括前述泵送装置的工 程机械。 该工程机械的其它结构参考现有技术， 本文不再赘述。 该工程机 械可以是砂浆泵、 灰浆机等， 优选砂浆泵。
综上所述， 本实用新型的泵送装置及工程机械， 第一泵送缸吸料过程 中第二泵送缸向外推料， 而第一泵送缸推料过程中第二泵送缸吸料， 从而 可以保证泵送过程中出料的连续性。 与现有技术相比， 本实用新型具有如 下优点：
1 ) 泵送连续性好
本实用新型在灰浆出口压力增大时， 第二泵送缸油压也随之增大， 不 会产生弹簧式泵送缸因出口压力过大时弹簧卡死而失去补偿作用的缺陷， 泵送连续性好。
2 )有利于保护发动机
本实用新型的第一泵送缸和第二泵送缸全部采用液压驱动， 在压力过 大时溢流， 能有效緩解外部刚性沖击， 不会产生凸轮式泵送缸憋死损坏发 动机的缺陷， 有效地保护了发动机， 提高了发动机的使用寿命。
3 )结构紧凑
本实用新型的液压油路及密封部件结构筒单、 紧凑， 体积较小， 不仅 可以在工程机械上实现多种布置方式， 而且也有利于各部件尤其是分配阀 的维修及更换。 因此， 本实用新型的有益效果是显而易见的。
以上所述仅为本实用新型的较佳实施例而已， 并不用以限制本实用新 型， 凡在本实用新型的精神和原则之内， 所作的任何修改、 等同替换、 改 进等， 均应包含在本实用新型的保护范围之内。

Claims

权 利 要 求
1、 一种泵送装置， 其特征在于， 包括：
第一泵送缸（1)和第二泵送缸（2), 所述第一泵送缸（1) 内设置有 第一活塞（31), 所述第二泵送缸（2) 内设置有第二活塞（32);
进料口 （4)和出料口 （5), 所述第一泵送缸（1)与进料口 （4)和出 料口 （5)之间的管道连通， 所述第二泵送缸（2)与出料口 （5)连通； 第一分配阀 （VI), 所述第一分配阀 （VI)设置在进料口 （4)和第一 泵送缸（1)之间的管道上；
第二分配阀 （ V2), 所述第二分配阀 （ V2)设置在第一泵送缸（ 1 )和 第二泵送缸（2)之间的管道上；
液压油路， 所述第一泵送缸（ 1 )和第二泵送缸（ 2 )均由液压油路供 油， 从而驱动所述第一活塞（31)和第二活塞（32)相互反方向的往复运 动。
2、根据权利要求 1所述的泵送装置， 其特征在于， 在所述液压油路上 设置：
换向阀 （V3), 所述换向阀 （V3) 包括第一接口和第二接口； 第一分流装置 （6), 所述第一分流装置（6) 的第一端连接第一接口， 所述第一分流装置（6) 的第二端分别连接第一泵送缸（1) 的有杆腔和第 二泵送缸（2) 的无杆腔；
第二分流装置 （7), 所述第二分流装置（7) 的第一端连接第二接口， 所述第二分流装置（7) 的第二端分别连接第一泵送缸（1) 的无杆腔和第 二泵送缸（2) 的有杆腔。
3、 根据权利要求 2所述的泵送装置， 其特征在于， 第一分流装置（6) 和第二分流装置（7) 为分流阀或分流马达。
4、根据权利要求 1所述的泵送装置，其特征在于，所述第一分配阀（VI ) 和第二分配阀 （V2)均为球阀， 所述进料口 （4)位于第一泵送缸（1)下 方， 所述出料口 （5)位于第一泵送缸（1)上方。
5、 根据权利要求 1-4任一项所述的泵送装置， 其特征在于， 所述第一 泵送缸（1) 的排浆量大于所述第二泵送缸（2) 的排浆量。
6、 一种工程机械， 其特征在于， 所述工程机械包括权利要求 1-5任一 项所述的泵送装置。
7、根据权利要求 6所述的工程机械， 其特征在于， 所述工程机械具体 为砂浆泵。
PCT/CN2012/074041 2011-08-15 2012-04-14 一种泵送装置及工程机械 WO2013023454A1 (zh)

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CN101078395A (zh) * 2007-06-21 2007-11-28 吕权 高效液压驱动流体泵
CN201277157Y (zh) * 2008-10-16 2009-07-22 施洋 油缸直驱式泥浆泵
CN201963506U (zh) * 2011-02-15 2011-09-07 冯国柱 液压泵浆装置及液压混浆泵送机

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5024584A (en) * 1987-11-30 1991-06-18 Tetra Dev-Co Pump unit with adjustable piston stroke length
US5209649A (en) * 1988-05-02 1993-05-11 Putzmeister-Week Maschinenfabrik Gmbh Control system for a two-cylinder thick matter pump
CN2578548Y (zh) * 2002-10-15 2003-10-08 吴利文 液压往复式泥浆泵
CN101078395A (zh) * 2007-06-21 2007-11-28 吕权 高效液压驱动流体泵
CN201277157Y (zh) * 2008-10-16 2009-07-22 施洋 油缸直驱式泥浆泵
CN201963506U (zh) * 2011-02-15 2011-09-07 冯国柱 液压泵浆装置及液压混浆泵送机

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