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Valve back compensation type load-sensitive multitandem valve with bidirectional confluence function

A load-sensing, post-valve compensation technology, applied in the field of multi-way valves, can solve problems such as limiting the scope of use, achieve the effects of convenient maintenance, replacement and debugging, rapid action, and improved stability

Active Publication Date: 2015-09-02
XCMG HYDRAULICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] 3. The connection method of the oil port is limited to threaded connection, which limits the scope of use

Method used

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  • Valve back compensation type load-sensitive multitandem valve with bidirectional confluence function
  • Valve back compensation type load-sensitive multitandem valve with bidirectional confluence function
  • Valve back compensation type load-sensitive multitandem valve with bidirectional confluence function

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with the accompanying drawings.

[0033] like figure 1 and figure 2As shown, a post-valve compensation load-sensing multi-way valve with two-way confluence includes a confluence union and two oil inlet working unions located at both ends of the confluence union. The confluence union is a confluence valve with two-way confluence function, including an electromagnetic Valve DTP3, hydraulic control valve LPD, shuttle valve IISV2 and electro-hydraulic joint control confluence switching valve PS, the input end of the solenoid valve DTP3 communicates with the confluence external control pressure input port P3, and the output end communicates with the input end of the shuttle valve IISV2; The pilot control terminal of the hydraulic control valve LPD communicates with the shuttle valve ISV1 and the oil return circuit T respectively, the input terminal communicates with the shuttle valve IIISV3 and the oil re...

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PUM

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Abstract

The invention discloses a valve back compensation type load-sensitive multitandem valve with a bidirectional confluence function. The valve back compensation type load-sensitive multitandem valve comprises a confluence tandem and two oil inlet operation tandems arranged at two ends of the confluence tandem. The confluence tandem is provided with a confluence valve with the bidirectional confluence function and comprises an electromagnetic valve, a hydraulic control valve, a shuttle valve II and an electro-hydraulic joint control confluence switching valve, an oil inlet tandem and two operation tandems are integrated in each oil inlet operation tandem and each operation tandem comprises a reversing speed-regulation valve and a pressure compensation valve arranged at an outlet of the reversing speed-regulation valve. The confluence tandem is detachably connected with the oil inlet operation tandems on two sides. The output end of the electro-hydraulic joint control confluence switching valve in the confluence tandem is communicated with the operation tandems. The confluence tandem allows oil to flow bidirectionally from p1 to p2 or vice versa, flow speed range of the tandems is broadened, and the executing mechanisms can act more quickly. By the pressure compensation technology, the problem that high-load executing mechanisms have little flow or even no flow when the executing mechanisms act at the same is solved, and action stability is improved.

Description

technical field [0001] The invention relates to a multi-way valve, in particular to a post-valve compensation type load-sensitive multi-way valve with two-way confluence, which is applied to control four types of actuators, such as main coil, auxiliary coil, luffing and telescopic, etc. on a truck crane. A valve belongs to the technical field of multi-way valves. Background technique [0002] At present, the main control valve widely used in small and medium tonnage truck cranes at home and abroad generally has two oil inlets P1 and P2. These two oil inlets P1 and P2 are respectively connected to different oil pumps. Oil can be supplied to any actuator at the same time as required. In this main control valve, the oil can only be confluent from P1 to P2, and the confluence of P2 to P1 cannot be realized, resulting in slow movement of the actuator and low operating efficiency. [0003] In the existing main control valve of small and medium tonnage truck cranes, the pressure ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B13/02
CPCF15B13/021F15B2211/40
Inventor 刘邦才李明生唐剑锋辛壮壮
Owner XCMG HYDRAULICS CO LTD
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