WO2018090690A1 - Flow control valve for auxiliary link of loader - Google Patents

Flow control valve for auxiliary link of loader Download PDF

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Publication number
WO2018090690A1
WO2018090690A1 PCT/CN2017/098927 CN2017098927W WO2018090690A1 WO 2018090690 A1 WO2018090690 A1 WO 2018090690A1 CN 2017098927 W CN2017098927 W CN 2017098927W WO 2018090690 A1 WO2018090690 A1 WO 2018090690A1
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Prior art keywords
auxiliary
oil
joint
valve
loader
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PCT/CN2017/098927
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French (fr)
Chinese (zh)
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杜阳
陈建军
牛宏杰
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江苏柳工机械有限公司
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Publication of WO2018090690A1 publication Critical patent/WO2018090690A1/en

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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2221—Control of flow rate; Load sensing arrangements
    • E02F9/2225—Control of flow rate; Load sensing arrangements using pressure-compensating valves

Definitions

  • the invention relates to a loader hydraulic valve, in particular to a loader auxiliary flow control valve, belonging to the technical field of engineering machinery.
  • the loader is an earth-rock construction machine widely used in road, railway, construction, hydropower, port, mining and other construction projects. It is mainly used for shovel loading bulk materials such as soil, sand, lime, coal, etc. Hard soil, etc., for light shovel. In addition, you can carry out operations such as pushing soil, leveling the ground, and pulling other machinery. Because the loader has the advantages of fast operation speed, high efficiency, good maneuverability and light operation, it has become one of the main types of earth and stone construction in engineering construction.
  • the realization of various functions of the loader is mainly through the switching of various attachments.
  • the attachment is an important part of the loader.
  • the most widely used attachments are buckets and forks.
  • the bucket is mainly used for earthwork and gravel.
  • the forks are mainly used for the transportation, loading and unloading of round materials such as wood and bamboo sticks, but the power source of the attachments is still derived from the hydraulic system of the whole machine.
  • the working principle of the hydraulic system of the loader is that the engine drives the hydraulic pump to generate high-pressure oil.
  • the high-pressure oil enters the hydraulic cylinder through the action of various hydraulic valves, and is loaded by the action of the hydraulic cylinder or enters the attachment through the auxiliary hydraulic valve.
  • Different attachments have different requirements for traffic. It is difficult for a complete machine to meet the requirements of matching various accessory traffic.
  • the conventional method is to use a combination valve of a diverter valve and a pressure compensating valve, but the combined valve is costly and the flow adjustment range is limited.
  • the present invention is to solve the problem that various types of attachments have different flow demand requirements, and aims to provide a kind of problem.
  • a loader auxiliary flow control valve includes an auxiliary interlock valve, an auxiliary joint oil joint and an auxiliary oil return joint, and the auxiliary joint oil joint and the auxiliary oil return joint respectively and the auxiliary joint switching valve
  • the two ports are connected, and a unidirectional steady flow valve assembly is connected to the front end pipeline of the auxiliary coal inlet.
  • the attachment of the loader inputs the high-pressure oil into the auxiliary coal inlet through the auxiliary switching valve, and the high-pressure oil enters the attachment through the auxiliary joint oil joint, and then returns to the hydraulic tank through the auxiliary return oil joint; the high-pressure oil Before entering the auxiliary coal inlet joint, the flow through the one-way steady flow valve assembly is adjusted to the flow required by the one-way steady flow valve assembly.
  • the one-way steady flow valve assembly comprises an orifice and a pressure compensation relief valve, the throttle hole being connected to the front end pipeline of the auxiliary inlet oil joint; the pressure compensation
  • the pressure relief oil passages of the relief valve are respectively connected at two ends of the orifice, the oil inlet of the overflow oil passage is connected with the oil inlet of the orifice, and the oil outlet is connected with the oil return passage of the auxiliary oil return joint.
  • the flow rate is adjusted by adjusting the pressure difference of the pressure compensation relief valve.
  • the orifice is a flow adjustable orifice.
  • At least two sets of one-way flow regulating valve assemblies are coupled to the front end pipeline of the auxiliary coal inlet.
  • a check valve is provided between the auxiliary oil return joint and the auxiliary joint switching valve, and the one-way valve is turned on to one end of the auxiliary joint switching valve.
  • the high-pressure oil cannot enter the attachment through the auxiliary return oil joint, causing damage to the attachment.
  • the invention can adjust the input flow of the system according to the requirements of the flow on the flow, the adjustment range is wide, the cost is low, no modification to the hydraulic system of the whole machine is required, the adaptability is strong, and the Preventing the misoperation of the auxiliary switching valve affects the attachment and the single-stable valve.
  • Figure 1 is a hydraulic schematic diagram of a first embodiment of the present invention
  • Figure 2 is a hydraulic schematic diagram of a second embodiment of the present invention.
  • Figure 3 is a hydraulic schematic diagram of a third embodiment of the present invention.
  • a loader auxiliary flow control valve includes an auxiliary interlock valve 1 , an auxiliary coal inlet joint 2 and an auxiliary oil return joint 3 , and the auxiliary joint oil joint 2 and the auxiliary return oil.
  • the joints 3 are respectively connected to the two oil ports of the auxiliary interlocking valve 11, and the one-way flow regulating valve assembly 4 is connected to the front end pipeline of the auxiliary oil inlet joint 2.
  • the attachment of the loader inputs the high-pressure oil into the auxiliary coal inlet joint 2 through the auxiliary switching valve 1, and the high-pressure oil enters the attachment through the auxiliary inlet oil joint 2, and then returns to the hydraulic tank through the auxiliary return oil joint 3.
  • the high-pressure oil enters the auxiliary inlet oil joint 2 through the one-way steady flow valve assembly 4, and the flow rate is adjusted to the flow required by the one-way steady flow valve assembly 4.
  • the one-way flow regulating valve assembly 4 includes an orifice 41 and a pressure compensation relief valve 42 which is connected to the front end pipeline of the auxiliary inlet oil joint 2;
  • the pressure compensating relief valve 42 pressure compensating oil passages are respectively connected at opposite ends of the orifice 41, the oil inlet port of the overflow oil passage is connected with the oil inlet port of the orifice 41, and the oil outlet port and the auxiliary oil return joint 3 are connected.
  • the return oil passage is connected.
  • the flow rate is adjusted by adjusting the pressure difference of the pressure compensation relief valve 42.
  • a loader auxiliary flow control valve includes an auxiliary switching valve and an auxiliary unit.
  • the oil inlet joint 2 and the auxiliary oil return joint 3 are respectively connected to the two oil ports of the auxiliary joint switching valve 11, and the front end of the auxiliary joint oil joint 2
  • a one-way steady flow valve assembly 4 is connected to the pipeline.
  • the attachment of the loader inputs the high-pressure oil into the auxiliary coal inlet joint 2 through the auxiliary switching valve 1, and the high-pressure oil enters the attachment through the auxiliary inlet oil joint 2, and then returns to the hydraulic tank through the auxiliary return oil joint 3.
  • the high-pressure oil enters the auxiliary inlet oil joint 2 through the one-way steady flow valve assembly 4, and the flow rate is adjusted to the flow required by the one-way steady flow valve assembly 4.
  • the one-way flow regulating valve assembly 4 includes an orifice 41 and a pressure compensation relief valve 42 which is connected to the front end pipeline of the auxiliary inlet oil joint 2;
  • the pressure compensating relief valve 42 pressure compensating oil passages are respectively connected at opposite ends of the orifice 41, the oil inlet port of the overflow oil passage is connected with the oil inlet port of the orifice 41, and the oil outlet port and the auxiliary oil return joint 3 are connected.
  • the return oil passage is connected.
  • the flow rate is adjusted by adjusting the pressure difference of the pressure compensation relief valve 42.
  • the orifice 41 is a flow adjustable orifice.
  • a loader auxiliary flow control valve includes an auxiliary interlock valve 1, an auxiliary coal inlet joint 2, and an auxiliary oil return joint 3, and the auxiliary joint oil joint 2 and the auxiliary joint.
  • the oil return joints 3 are respectively connected to the two oil ports of the auxiliary interlocking valve 11, and the one-way flow regulating valve assembly 4 is connected to the front end pipeline of the auxiliary oil inlet joint 2.
  • the attachment of the loader inputs the high-pressure oil into the auxiliary coal inlet joint 2 through the auxiliary switching valve 1, and the high-pressure oil enters the attachment through the auxiliary inlet oil joint 2, and then returns to the hydraulic tank through the auxiliary return oil joint 3.
  • the high-pressure oil enters the auxiliary inlet oil joint 2 through the one-way steady flow valve assembly 4, and the flow rate is adjusted to the flow required by the one-way steady flow valve assembly 4.
  • the one-way flow regulating valve assembly 4 includes an orifice 41 and a pressure compensation overflow.
  • the flow valve 42 is connected to the front end pipeline of the auxiliary coal inlet joint 2; the pressure compensating relief valve 42 is respectively connected to the two ends of the orifice 41, the overflow oil passage
  • the oil inlet port communicates with the oil inlet port of the orifice 41, and the oil outlet port communicates with the oil return oil passage of the auxiliary oil return joint 3.
  • the flow rate is adjusted by adjusting the pressure difference of the pressure compensation relief valve 42.
  • the orifice 41 is a flow adjustable orifice.
  • At least two sets of one-way flow regulating valve assemblies 4 are coupled to the front end line of the auxiliary coal inlet joint 2.
  • a check valve 5 is provided between the auxiliary return oil connection 3 and the auxiliary switching valve 1, and the check valve 5 is guided to the auxiliary switching valve 1 at one end. through.
  • the high-pressure oil cannot enter the attachment through the auxiliary return oil joint, causing damage to the attachment.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Operation Control Of Excavators (AREA)

Abstract

A flow control valve for an auxiliary link of a loader, comprising an auxiliary link switching valve (1), an auxiliary link inlet fitting (2), and an auxiliary link oil return fitting (3), the auxiliary link inlet fitting (2) and the auxiliary link oil return fitting (3) being respectively connected to the two oil ports of the auxiliary link switching valve (1), and a one-way steady-flow valve assembly (4) being connected in a pipeline at the front end of the auxiliary link inlet fitting (2).

Description

装载机辅助联流量操控阀Loader auxiliary flow control valve 技术领域Technical field
本发明涉及一种装载机液压阀，特别涉及一种装载机辅助联流量操控阀，属于工程机械技术领域。The invention relates to a loader hydraulic valve, in particular to a loader auxiliary flow control valve, belonging to the technical field of engineering machinery.
背景技术Background technique
装载机是一种广泛用于公路、铁路、建筑、水电、港口、矿山等建设工程的土石方施工机械，它主要用于铲装土壤、砂石、石灰、煤炭等散状物料，也可对矿石、硬土等作轻度铲挖作业。此外还可进行推运土壤、刮平地面和牵引其他机械等作业。由于装载机具有作业速度快、效率高、机动性好、操作轻便等优点，因此它成为工程建设中土石方施工的主要机种之一。The loader is an earth-rock construction machine widely used in road, railway, construction, hydropower, port, mining and other construction projects. It is mainly used for shovel loading bulk materials such as soil, sand, lime, coal, etc. Hard soil, etc., for light shovel. In addition, you can carry out operations such as pushing soil, leveling the ground, and pulling other machinery. Because the loader has the advantages of fast operation speed, high efficiency, good maneuverability and light operation, it has become one of the main types of earth and stone construction in engineering construction.
装载机各种功能的实现主要是通过各类属具的切换，属具是装载机的重要组成部分，目前，应用最广泛的属具是铲斗和叉子，铲斗主要运用于土方、砂石等的铲运和平地作业，叉子主要用于木材、竹棒等圆形物料的运输、装车和卸料，但是属具的动力源还是来源于整机的液压系统。The realization of various functions of the loader is mainly through the switching of various attachments. The attachment is an important part of the loader. At present, the most widely used attachments are buckets and forks. The bucket is mainly used for earthwork and gravel. The forks are mainly used for the transportation, loading and unloading of round materials such as wood and bamboo sticks, but the power source of the attachments is still derived from the hydraulic system of the whole machine.
装载机的液压系统工作原理是发动机带动液压泵工作，产生高压油液，高压油液通过各种液压阀的动作进入液压油缸，通过液压油缸的动作实现装载或者通过辅助联液压阀进入属具进行其他作业。不同的属具对流量的需求各有不同。一台整机很难满足匹配各种属具流量的要求。The working principle of the hydraulic system of the loader is that the engine drives the hydraulic pump to generate high-pressure oil. The high-pressure oil enters the hydraulic cylinder through the action of various hydraulic valves, and is loaded by the action of the hydraulic cylinder or enters the attachment through the auxiliary hydraulic valve. Other homework. Different attachments have different requirements for traffic. It is difficult for a complete machine to meet the requirements of matching various accessory traffic.
目前，传统做法是采用分流阀加压力补偿阀的组合阀，但是这种组合阀成本较高，并且流量的调节范围有限。At present, the conventional method is to use a combination valve of a diverter valve and a pressure compensating valve, but the combined valve is costly and the flow adjustment range is limited.
发明内容Summary of the invention
本发明是为了解决各类属具对流量大小需求各不相同的问题，旨在提供一种 适应多种流量大小的装载机辅助联流量操控阀。The present invention is to solve the problem that various types of attachments have different flow demand requirements, and aims to provide a kind of problem. Loader-assisted flow control valve for a variety of flow sizes.
技术方案：一种装载机辅助联流量操控阀，包括辅助联切换阀、辅助联进油接头和辅助联回油接头，所述辅助联进油接头和辅助联回油接头分别与辅助联切换阀的两个油口连接，所述辅助联进油接头前端管路中接有单向稳流阀总成。装载机的属具通过辅助联切换阀将高压油液输入至辅助联进油接头，高压油液经过辅助联进油接头进入属具，再通过辅助联回油接头回到液压油箱；高压油液进入辅助联进油接头前先通过单向稳流阀总成，通过单向稳流阀总成将流量调节至属具所需要的流量大小。Technical Solution: A loader auxiliary flow control valve includes an auxiliary interlock valve, an auxiliary joint oil joint and an auxiliary oil return joint, and the auxiliary joint oil joint and the auxiliary oil return joint respectively and the auxiliary joint switching valve The two ports are connected, and a unidirectional steady flow valve assembly is connected to the front end pipeline of the auxiliary coal inlet. The attachment of the loader inputs the high-pressure oil into the auxiliary coal inlet through the auxiliary switching valve, and the high-pressure oil enters the attachment through the auxiliary joint oil joint, and then returns to the hydraulic tank through the auxiliary return oil joint; the high-pressure oil Before entering the auxiliary coal inlet joint, the flow through the one-way steady flow valve assembly is adjusted to the flow required by the one-way steady flow valve assembly.
优选项，为了方便流量的调节，所述单向稳流阀总成包括节流孔和压力补偿溢流阀，所述节流孔接于辅助联进油接头前端管路中；所述压力补偿溢流阀压力补偿油路分别节流孔两端连接，所述溢流油路进油口与节流孔的进油口连通，出油口与辅助联回油接头的回油油路连通。通过调节压力补偿溢流阀的压力差进而调节流量的大小。Preferably, in order to facilitate the adjustment of the flow rate, the one-way steady flow valve assembly comprises an orifice and a pressure compensation relief valve, the throttle hole being connected to the front end pipeline of the auxiliary inlet oil joint; the pressure compensation The pressure relief oil passages of the relief valve are respectively connected at two ends of the orifice, the oil inlet of the overflow oil passage is connected with the oil inlet of the orifice, and the oil outlet is connected with the oil return passage of the auxiliary oil return joint. The flow rate is adjusted by adjusting the pressure difference of the pressure compensation relief valve.
优选项，为了方便流量的调节，适应更多属具对流量的要求，所述节流孔为流量可调节流孔。Preferably, in order to facilitate the adjustment of the flow, the flow requirements of more attachments are accommodated, and the orifice is a flow adjustable orifice.
优选项，为了扩大流量调节范围，所述辅助联进油接头前端管路中并联接有至少两组单向稳流阀总成。Preferably, in order to expand the flow adjustment range, at least two sets of one-way flow regulating valve assemblies are coupled to the front end pipeline of the auxiliary coal inlet.
优选项，为了防止误操作，辅助联回油接头与辅助联切换阀之间设有单向阀，所述单向阀向辅助联切换阀一端导通。高压油液无法通过辅助联回油接头进入属具，对属具造成破坏。Preferably, in order to prevent erroneous operation, a check valve is provided between the auxiliary oil return joint and the auxiliary joint switching valve, and the one-way valve is turned on to one end of the auxiliary joint switching valve. The high-pressure oil cannot enter the attachment through the auxiliary return oil joint, causing damage to the attachment.
有益效果：本发明能够根据属具对流量的要求对系统输入流量进行调节，调节范围宽，成本低，不需要对整机液压系统进行任何改动，适应性强，并且还通 过防止辅助联切换阀误操作对属具和单稳阀造成影响。Advantageous Effects: The invention can adjust the input flow of the system according to the requirements of the flow on the flow, the adjustment range is wide, the cost is low, no modification to the hydraulic system of the whole machine is required, the adaptability is strong, and the Preventing the misoperation of the auxiliary switching valve affects the attachment and the single-stable valve.
附图说明DRAWINGS
图1为本发明第一实施例的液压原理图；Figure 1 is a hydraulic schematic diagram of a first embodiment of the present invention;
图2为本发明第二实施例的液压原理图；Figure 2 is a hydraulic schematic diagram of a second embodiment of the present invention;
图3为本发明第三实施例的液压原理图。Figure 3 is a hydraulic schematic diagram of a third embodiment of the present invention.
具体实施方式detailed description
下面结合附图对本发明的具体实施方式作进一步详细的说明。The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.
实施例一Embodiment 1
如图1所示，一种装载机辅助联流量操控阀，包括辅助联切换阀1、辅助联进油接头2和辅助联回油接头3，所述辅助联进油接头2和辅助联回油接头3分别与辅助联切换阀11的两个油口连接，所述辅助联进油接头2前端管路中接有单向稳流阀总成4。装载机的属具通过辅助联切换阀1将高压油液输入至辅助联进油接头2，高压油液经过辅助联进油接头2进入属具，再通过辅助联回油接头3回到液压油箱；高压油液进入辅助联进油接头2前先通过单向稳流阀总成4，通过单向稳流阀总成4将流量调节至属具所需要的流量大小。As shown in FIG. 1 , a loader auxiliary flow control valve includes an auxiliary interlock valve 1 , an auxiliary coal inlet joint 2 and an auxiliary oil return joint 3 , and the auxiliary joint oil joint 2 and the auxiliary return oil. The joints 3 are respectively connected to the two oil ports of the auxiliary interlocking valve 11, and the one-way flow regulating valve assembly 4 is connected to the front end pipeline of the auxiliary oil inlet joint 2. The attachment of the loader inputs the high-pressure oil into the auxiliary coal inlet joint 2 through the auxiliary switching valve 1, and the high-pressure oil enters the attachment through the auxiliary inlet oil joint 2, and then returns to the hydraulic tank through the auxiliary return oil joint 3. The high-pressure oil enters the auxiliary inlet oil joint 2 through the one-way steady flow valve assembly 4, and the flow rate is adjusted to the flow required by the one-way steady flow valve assembly 4.
为了方便流量的调节，所述单向稳流阀总成4包括节流孔41和压力补偿溢流阀42，所述节流孔41接于辅助联进油接头2前端管路中；所述压力补偿溢流阀42压力补偿油路分别节流孔41两端连接，所述溢流油路进油口与节流孔41的进油口连通，出油口与辅助联回油接头3的回油油路连通。通过调节压力补偿溢流阀42的压力差进而调节流量的大小。In order to facilitate the adjustment of the flow rate, the one-way flow regulating valve assembly 4 includes an orifice 41 and a pressure compensation relief valve 42 which is connected to the front end pipeline of the auxiliary inlet oil joint 2; The pressure compensating relief valve 42 pressure compensating oil passages are respectively connected at opposite ends of the orifice 41, the oil inlet port of the overflow oil passage is connected with the oil inlet port of the orifice 41, and the oil outlet port and the auxiliary oil return joint 3 are connected. The return oil passage is connected. The flow rate is adjusted by adjusting the pressure difference of the pressure compensation relief valve 42.
实施例二 Embodiment 2
如图3所示，一种装载机辅助联流量操控阀，包括辅助联切换阀1、辅助联 进油接头2和辅助联回油接头3，所述辅助联进油接头2和辅助联回油接头3分别与辅助联切换阀11的两个油口连接，所述辅助联进油接头2前端管路中接有单向稳流阀总成4。装载机的属具通过辅助联切换阀1将高压油液输入至辅助联进油接头2，高压油液经过辅助联进油接头2进入属具，再通过辅助联回油接头3回到液压油箱；高压油液进入辅助联进油接头2前先通过单向稳流阀总成4，通过单向稳流阀总成4将流量调节至属具所需要的流量大小。As shown in FIG. 3, a loader auxiliary flow control valve includes an auxiliary switching valve and an auxiliary unit. The oil inlet joint 2 and the auxiliary oil return joint 3 are respectively connected to the two oil ports of the auxiliary joint switching valve 11, and the front end of the auxiliary joint oil joint 2 A one-way steady flow valve assembly 4 is connected to the pipeline. The attachment of the loader inputs the high-pressure oil into the auxiliary coal inlet joint 2 through the auxiliary switching valve 1, and the high-pressure oil enters the attachment through the auxiliary inlet oil joint 2, and then returns to the hydraulic tank through the auxiliary return oil joint 3. The high-pressure oil enters the auxiliary inlet oil joint 2 through the one-way steady flow valve assembly 4, and the flow rate is adjusted to the flow required by the one-way steady flow valve assembly 4.
为了方便流量的调节，所述单向稳流阀总成4包括节流孔41和压力补偿溢流阀42，所述节流孔41接于辅助联进油接头2前端管路中；所述压力补偿溢流阀42压力补偿油路分别节流孔41两端连接，所述溢流油路进油口与节流孔41的进油口连通，出油口与辅助联回油接头3的回油油路连通。通过调节压力补偿溢流阀42的压力差进而调节流量的大小。In order to facilitate the adjustment of the flow rate, the one-way flow regulating valve assembly 4 includes an orifice 41 and a pressure compensation relief valve 42 which is connected to the front end pipeline of the auxiliary inlet oil joint 2; The pressure compensating relief valve 42 pressure compensating oil passages are respectively connected at opposite ends of the orifice 41, the oil inlet port of the overflow oil passage is connected with the oil inlet port of the orifice 41, and the oil outlet port and the auxiliary oil return joint 3 are connected. The return oil passage is connected. The flow rate is adjusted by adjusting the pressure difference of the pressure compensation relief valve 42.
为了方便流量的调节，适应更多属具对流量的要求，所述节流孔41为流量可调节流孔。In order to facilitate the adjustment of the flow rate, the flow requirements of more attachments are accommodated, and the orifice 41 is a flow adjustable orifice.
实施例三 Embodiment 3
如图2和3所示，一种装载机辅助联流量操控阀，包括辅助联切换阀1、辅助联进油接头2和辅助联回油接头3，所述辅助联进油接头2和辅助联回油接头3分别与辅助联切换阀11的两个油口连接，所述辅助联进油接头2前端管路中接有单向稳流阀总成4。装载机的属具通过辅助联切换阀1将高压油液输入至辅助联进油接头2，高压油液经过辅助联进油接头2进入属具，再通过辅助联回油接头3回到液压油箱；高压油液进入辅助联进油接头2前先通过单向稳流阀总成4，通过单向稳流阀总成4将流量调节至属具所需要的流量大小。As shown in FIGS. 2 and 3, a loader auxiliary flow control valve includes an auxiliary interlock valve 1, an auxiliary coal inlet joint 2, and an auxiliary oil return joint 3, and the auxiliary joint oil joint 2 and the auxiliary joint. The oil return joints 3 are respectively connected to the two oil ports of the auxiliary interlocking valve 11, and the one-way flow regulating valve assembly 4 is connected to the front end pipeline of the auxiliary oil inlet joint 2. The attachment of the loader inputs the high-pressure oil into the auxiliary coal inlet joint 2 through the auxiliary switching valve 1, and the high-pressure oil enters the attachment through the auxiliary inlet oil joint 2, and then returns to the hydraulic tank through the auxiliary return oil joint 3. The high-pressure oil enters the auxiliary inlet oil joint 2 through the one-way steady flow valve assembly 4, and the flow rate is adjusted to the flow required by the one-way steady flow valve assembly 4.
为了方便流量的调节，所述单向稳流阀总成4包括节流孔41和压力补偿溢 流阀42，所述节流孔41接于辅助联进油接头2前端管路中；所述压力补偿溢流阀42压力补偿油路分别节流孔41两端连接，所述溢流油路进油口与节流孔41的进油口连通，出油口与辅助联回油接头3的回油油路连通。通过调节压力补偿溢流阀42的压力差进而调节流量的大小。In order to facilitate the adjustment of the flow rate, the one-way flow regulating valve assembly 4 includes an orifice 41 and a pressure compensation overflow. The flow valve 42 is connected to the front end pipeline of the auxiliary coal inlet joint 2; the pressure compensating relief valve 42 is respectively connected to the two ends of the orifice 41, the overflow oil passage The oil inlet port communicates with the oil inlet port of the orifice 41, and the oil outlet port communicates with the oil return oil passage of the auxiliary oil return joint 3. The flow rate is adjusted by adjusting the pressure difference of the pressure compensation relief valve 42.
为了方便流量的调节，适应更多属具对流量的要求，所述节流孔41为流量可调节流孔。In order to facilitate the adjustment of the flow rate, the flow requirements of more attachments are accommodated, and the orifice 41 is a flow adjustable orifice.
为了扩大流量调节范围，所述辅助联进油接头2前端管路中并联接有至少两组单向稳流阀总成4。In order to expand the flow adjustment range, at least two sets of one-way flow regulating valve assemblies 4 are coupled to the front end line of the auxiliary coal inlet joint 2.
如图1、2和3所示，为了防止误操作，辅助联回油接头3与辅助联切换阀1之间设有单向阀5，所述单向阀5向辅助联切换阀1一端导通。高压油液无法通过辅助联回油接头进入属具，对属具造成破坏。 As shown in FIGS. 1, 2 and 3, in order to prevent erroneous operation, a check valve 5 is provided between the auxiliary return oil connection 3 and the auxiliary switching valve 1, and the check valve 5 is guided to the auxiliary switching valve 1 at one end. through. The high-pressure oil cannot enter the attachment through the auxiliary return oil joint, causing damage to the attachment.

Claims (5)

  1. 一种装载机辅助联流量操控阀，包括辅助联切换阀(1)、辅助联进油接头(2)和辅助联回油接头(3)，所述辅助联进油接头(2)和辅助联回油接头(3)分别与辅助联切换阀(1)(1)的两个油口连接，其特征在于：所述辅助联进油接头(2)前端管路中接有单向稳流阀总成(4)。A loader auxiliary flow control valve includes an auxiliary switching valve (1), an auxiliary coal inlet joint (2) and an auxiliary oil return joint (3), the auxiliary joint oil joint (2) and the auxiliary joint The oil return joints (3) are respectively connected with the two oil ports of the auxiliary joint switching valve (1) (1), characterized in that: the auxiliary joint oil inlet (2) has a one-way flow regulating valve in the front end pipeline Assembly (4).
  2. 根据权利要求1所述的装载机辅助联流量操控阀，其特征在于：所述单向稳流阀总成(4)包括节流孔(41)和压力补偿溢流阀(42)，所述节流孔(41)接于辅助联进油接头(2)前端管路中；所述压力补偿溢流阀(42)压力补偿油路分别节流孔(41)两端连接，所述溢流油路进油口与节流孔(41)的进油口连通，出油口与辅助联回油接头(3)的回油油路连通。The loader auxiliary flow control valve according to claim 1, wherein said one-way flow regulating valve assembly (4) includes an orifice (41) and a pressure compensation relief valve (42), The orifice (41) is connected to the front end pipeline of the auxiliary coal inlet (2); the pressure compensating relief valve (42) is respectively connected to the pressure compensation oil passages at opposite ends of the orifice (41), the overflow The oil inlet port of the oil passage is connected to the oil inlet of the orifice (41), and the oil outlet is connected to the return oil passage of the auxiliary oil return joint (3).
  3. 根据权利要求2所述的装载机辅助联流量操控阀，其特征在于：所述节流孔(41)为流量可调节流孔。The loader auxiliary flow control valve according to claim 2, wherein the orifice (41) is a flow adjustable orifice.
  4. 根据权利要求1-3中任一项所述的装载机辅助联流量操控阀，其特征在于：所述辅助联进油接头(2)前端管路中并联接有至少两组单向稳流阀总成(4)。The loader auxiliary flow control valve according to any one of claims 1 to 3, characterized in that: at least two sets of one-way flow regulating valves are coupled to the front end pipeline of the auxiliary coal inlet (2) Assembly (4).
  5. 根据权利要求4所述的装载机辅助联流量操控阀，其特征在于：辅助联回油接头(3)与辅助联切换阀(1)之间设有单向阀(5)，所述单向阀(5)向辅助联切换阀(1)一端导通。 The loader auxiliary flow control valve according to claim 4, characterized in that: a check valve (5) is provided between the auxiliary oil return joint (3) and the auxiliary joint switching valve (1), the one direction The valve (5) is turned on to one end of the auxiliary switching valve (1).
PCT/CN2017/098927 2016-11-16 2017-08-25 Flow control valve for auxiliary link of loader WO2018090690A1 (en)

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Publication number Priority date Publication date Assignee Title
CN106638757A (en) * 2016-11-16 2017-05-10 江苏柳工机械有限公司 Auxiliary combined flow control valve for loader
CN107419765B (en) * 2017-06-28 2021-03-23 中联重科股份有限公司渭南分公司 Multifunctional equipment switching control equipment, control system and accessory

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07207697A (en) * 1994-01-13 1995-08-08 Yutani Heavy Ind Ltd Hydraulic circuit for construction machine
JPH09151487A (en) * 1995-11-24 1997-06-10 Hitachi Constr Mach Co Ltd Hydraulic pump control device
CN1576471A (en) * 2003-06-25 2005-02-09 沃尔沃建造设备控股（瑞典）有限公司 Hydraulic circuit for option tool of heavy equipment
CN103711172A (en) * 2013-12-18 2014-04-09 广西柳工机械股份有限公司 Loader four-pump quantitative confluence hydraulic system
CN106638757A (en) * 2016-11-16 2017-05-10 江苏柳工机械有限公司 Auxiliary combined flow control valve for loader
CN206495255U (en) * 2016-11-16 2017-09-15 江苏柳工机械有限公司 Loading machine auxiliary connection flow driven valve

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07207697A (en) * 1994-01-13 1995-08-08 Yutani Heavy Ind Ltd Hydraulic circuit for construction machine
JPH09151487A (en) * 1995-11-24 1997-06-10 Hitachi Constr Mach Co Ltd Hydraulic pump control device
CN1576471A (en) * 2003-06-25 2005-02-09 沃尔沃建造设备控股（瑞典）有限公司 Hydraulic circuit for option tool of heavy equipment
CN103711172A (en) * 2013-12-18 2014-04-09 广西柳工机械股份有限公司 Loader four-pump quantitative confluence hydraulic system
CN106638757A (en) * 2016-11-16 2017-05-10 江苏柳工机械有限公司 Auxiliary combined flow control valve for loader
CN206495255U (en) * 2016-11-16 2017-09-15 江苏柳工机械有限公司 Loading machine auxiliary connection flow driven valve

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