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Stop valve of hydraulic suspension device

A technology of hydraulic suspension and shut-off valve, applied in the direction of fluid pressure actuating device, valve device, adjusting device, etc., can solve the problems of valve body and valve stem gap leakage, agricultural implement settlement, etc., to achieve reliable use, avoid agricultural implement settlement, control responsive effect

Pending Publication Date: 2020-11-17
WEIFANG LICHUANG ELECTRONICS TECH
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] During use, it was found that when the hydraulic distributor is in the neutral working mode, the force of the farm implement acting on the lifting cylinder forms a high pressure on the hydraulic oil, which is transmitted to the hydraulic distributor and leaks through the gap between the valve body and the valve stem in the hydraulic distributor, causing Settlement of farm implements

Method used

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  • Stop valve of hydraulic suspension device
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  • Stop valve of hydraulic suspension device

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0032] Such as figure 1 As shown, an intelligent control system of a hydraulic suspension device can intelligently control the hydraulic suspension device of a tractor, and can also intelligently control the hydraulic suspension device of other agricultural equipment.

[0033] refer to figure 2 , the hydraulic distributor 30 includes a valve body 301 and a valve stem 302 arranged in the valve body 301, the valve body 301 is provided with a first working oil chamber a communicating with the first working oil port A, and a second working oil chamber a communicated with the second working oil port A. The second working oil chamber b communicated with the oil port B, the pressure oil chamber p communicated with the pressure oil port P and the oil return chamber t communicated with the oil return port T.

[0034] Such as figure 1 As shown, the first work...

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Abstract

The invention discloses a stop valve of a hydraulic suspension device. The stop valve is arranged between a rodless cavity of a lifting oil cylinder and a first working oil port of a hydraulic distributor. The stop valve comprises a valve bush, a valve element, a return spring and a gland device. The valve element comprises a first valve element section and a second valve element section which arethe same in outer diameter. The second valve element section is provided with a flange. The flange is provided with a valve element sealing conical surface. A valve bush sealing conical surface is arranged at an end of the first valve bush. The taper of the valve element sealing conical surface is different from that of the valve bush sealing conical surface. Under the action of the return spring, when the valve element sealing conical surface abuts against the inner side edge of the valve bush sealing conical surface, a first cavity and a second cavity are disconnected. In a neutral state, the stop valve is closed, connection between the rodless cavity of the lifting oil cylinder and the hydraulic distributor is cut off, and farm tool sedimentation caused by leakage of the hydraulic distributor is avoided; and in addition, when the valve is opened, only the elastic force of the return spring needs to be overcome, the valve is completely not affected by hydraulic oil flowing through the valve, and the stop valve is more sensitive in operation and more reliable to use.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a cut-off valve used in a hydraulic suspension device of agricultural equipment. Background technique [0002] The hydraulic suspension device of agricultural equipment (such as tractors) is used to connect suspended or semi-suspended agricultural implements, perform agricultural implement lifting and plowing depth adjustment, and realize loading and hydraulic power output, etc. The hydraulic suspension device consists of a hydraulic system and a suspension mechanism. The hydraulic system includes an oil pump, a distributor, a lifting cylinder, and an oil cylinder control mechanism. The suspension mechanism includes an upper pull rod, a lower rod, and a lifting arm. On the one hand, by manipulating the distributor, the raising, lowering, neutralization and floating of the agricultural implements can be realized, so that the tractor has the functions of position control, force cont...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B13/044F15B11/042F15B11/08F16K1/38F16K3/314F16K27/00A01B63/10
CPCF15B13/044F15B11/042F15B11/08F16K1/38F16K3/314F16K27/00A01B63/1006
Inventor 王立峰王秀强李武海尹伟科李克旭王孟晓吴龙龙王昊天
Owner WEIFANG LICHUANG ELECTRONICS TECH
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