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Pipeline heating deflation valve and rotation closed type hydraulic system of crane

A technology of air release valve and pipeline, applied in the field of rotary closed hydraulic system, can solve the problems of oil heating and high cost of artificial exhaust, and achieve the effect of avoiding manual operation and reducing labor cost.

Active Publication Date: 2015-12-16
WUHAN MARINE MACHINERY PLANT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems in the prior art that the cost of artificial exhaust is high and the oil in the pipeline of the closed hydraulic system cannot be heated, the embodiment of the present invention provides a pipeline heating and deflation valve and a rotary closed hydraulic system of the crane. system

Method used

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  • Pipeline heating deflation valve and rotation closed type hydraulic system of crane
  • Pipeline heating deflation valve and rotation closed type hydraulic system of crane

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Embodiment 1

[0024] The embodiment of the present invention provides a pipeline heating and deflation valve, which is suitable for closed hydraulic systems where the working environment temperature is low (below 15°C) and the pipeline is easy to mix with air, such as figure 1 As shown, the pipeline heating purge valve includes: cut-off valve 1, overflow valve 2, first restrictor 3 and check valve 4, the oil outlet of cut-off valve 1 communicates with the oil inlet of overflow valve 2 , the oil inlet of stop valve 1 communicates with the oil inlet of first restrictor 3, the oil outlet of first restrictor 3 communicates with the oil outlet of check valve 4, and the oil inlet of check valve 4 It communicates with the oil outlet of the overflow valve 2 , and an oil drain L is arranged on the pipeline between the oil outlet of the check valve 4 and the oil outlet of the first restrictor 3 . The oil drain port L is used to connect with the leakage pipe in the pipeline of the hydraulic system.

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Embodiment 2

[0039] The embodiment of the present invention provides a rotary closed hydraulic system of a crane, including: a closed hydraulic pump 6, a rotary motor 7, a buffer damper 8, a fixed damper 9, a two-position four-way reversing valve 10, a pressure reducing valve 11 and The brake cylinder 12, the oil outlet of the closed hydraulic pump 6 is connected with the oil inlet of the rotary motor 7, the oil outlet of the rotary motor 7 is connected with the oil inlet of the closed hydraulic pump 6, and the two ends of the buffer damper 8 are respectively It is connected with the oil inlet and outlet of the rotary motor 7, the A port of the two-position four-way reversing valve 10 is connected with the P port of the pressure reducing valve 11, and the A port of the pressure reducing valve 11 is connected with the brake cylinder 12. The rod cavity is connected, the T port of the two-position four-way reversing valve 10 and the T port of the pressure reducing valve 11 are connected with t...

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Abstract

The invention discloses a pipeline heating deflation valve and a rotation closed type hydraulic system of a crane, and belongs to the field of a closed type hydraulic system. The pipeline heating deflation valve comprises a stop valve, an overflow valve, a first throttler and a one-way valve, wherein an oil outlet of the stop valve is communicated with an oil inlet of the overflow valve; an oil inlet of the stop valve is communicated with an oil inlet of the first throttler; an oil outlet of the first throttler is communicated with an oil outlet of the one-way valve; an oil inlet of the one-way valve is communicated with an oil outlet of the overflow valve; a pipeline between the oil outlet of the one-way valve and the oil outlet of the first throttler is provided with an oil leakage opening; and the rotation closed type hydraulic system of a crane comprises the pipeline heating deflation valve. According to the pipeline heating deflation valve, the stop valve can be closed to realize automatic exhaust; the stop valve is opened, oil liquid passes through the overflow valve, and the overflow valve can be used for carrying out circulation heating on the oil liquid in the pipeline of the closed type hydraulic system; if the oil liquid contains gas, the gas can pass through the one-way valve along with the oil liquid to be discharged to the oil leakage opening and outflow, so that the automatic exhaust is realized.

Description

technical field [0001] The invention relates to the field of closed hydraulic systems, in particular to a pipeline heating air release valve and a rotary closed hydraulic system of a crane. Background technique [0002] In the hydraulic system, sometimes it is necessary to exhaust the hydraulic system pipeline and circulate the hydraulic oil in the pipeline for heating. [0003] The exhaust in the existing hydraulic system pipeline is manually exhausted through the exhaust valve installed in the pipeline, and the heating method for the existing open hydraulic system pipeline is through the heater in the hydraulic system oil tank Heat the hydraulic oil. [0004] In the process of realizing the present invention, the inventor finds that there are at least the following problems in the prior art: [0005] Manual exhaust is required every time the hydraulic system is started, and manual exhaust is costly and time-consuming. At the same time, the existing heater is placed insid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B13/02B66C23/84
Inventor 鄢勇洪威
Owner WUHAN MARINE MACHINERY PLANT
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