Active pressure compensation device and method and double-wheel slot milling machine

Abstract

The invention discloses an active pressure compensation device and method and a double-wheel slot milling machine, belongs to the field of piling machinery, and aims to realize automatic adjustment of internal pressure of a working device. The active pressure compensation device comprises an oil liquid converter, a working device, a detection assembly and a control device. The oil liquid converter comprises a first cavity and a second cavity which are not communicated with each other; the sum of the volume of the first cavity and the volume of the second cavity is determined, and the volume change trends of the first cavity and the second cavity are opposite; the working device is in fluid communication with the second cavity; the detection assembly is used for detecting the pressure of a third fluid outside the working device and the pressure of a second fluid inside the working device; the control device is in communication connection with the detection assembly and is configured to control the volume of the first cavity according to the difference value between the detected pressure of the third fluid and the detected pressure of the second fluid so as to control the internal pressure of the working device. According to the active pressure compensation device and method and the double-wheel slot milling machine of the technical schemes, real-time and dynamic adjustment of the internal pressure of the working device is achieved.

Description

technical field [0001] The invention relates to the field of pile machinery, in particular to an active pressure compensation device, a method and a double-wheel slot milling machine. Background technique [0002] When the double-wheel slot milling machine is working underwater, as the working depth continues to increase, the external pressure on the working device gradually increases. At this time, the working device has the risk of entering muddy water due to the failure of the seal. Therefore, in order to To prevent this risk from happening, it is necessary to make the pressure inside the working device equal to or slightly greater than the external pressure. [0003] In the related art, the following compensator is used to change the internal pressure of the working device: the pressure-sensitive element is used to sense and transmit the external water pressure, and then the elastic force of the spring is used to increase the pressure so that the internal pressure of the...

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Problems solved by technology

[0004] The inventors have found that there are at least the following problems in the prior art: since the working depth of the working device is constantly changing, the compensator provided in the related art can only provide a certain pressure value, which makes the compensator unable to meet Practical working requirements of double wheel milling machine

After the two-wheel milling machine starts to work, since the pressure difference provided by the compensator cannot change with the change of water depth, if the initial pressure set by the compensator is small, it can only adapt to shallow water operations

If the initial pressure of the compensator is set too high in order to meet the construction needs in deep water, then in shallow water, the internal pressure of the working device will be too high, and the oil inside the working device may leak out.

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