Step-changing control hydraulic system of vertical shaft heading machine

Abstract

The invention discloses a vertical shaft heading machine step-changing control hydraulic system which comprises a first oil pump, a first reversing valve, a hydraulic control one-way valve and a thrust oil cylinder, the first oil pump is connected with the first reversing valve, the first reversing valve is connected with the hydraulic control one-way valve, and the hydraulic control one-way valve is connected with a rod cavity and a rodless cavity of the thrust oil cylinder. An electromagnetic ball valve and a first proportional overflow valve are connected to an oil way where the hydraulic control one-way valve is connected with a rodless cavity of the thrust oil cylinder, the variable frequency motor provides power for the second oil pump, the second oil pump is connected with the second reversing valve, and the second reversing valve is connected with a rod cavity and a rodless cavity of the lifting oil cylinder. The hydraulic control one-way valve is used for carrying out pressure maintaining on propelling force, the situation that the pressure of the propelling oil cylinder is suddenly released in the step changing state can be avoided, in addition, overflow unloading is carried out through the electromagnetic ball valve and the first proportional overflow valve, it can be guaranteed that the step changing process of a lifting system is stable, and therefore the operation stability and safety of a hydraulic system can be improved.

Description

technical field

[0001] The invention relates to the technical field of shaft boring machines, in particular to a step change control hydraulic system of the vertical shaft boring machines. Background technique

[0002] Shaft boring machine is a kind of construction machinery equipment specially used for the excavation of underground vertical tunnel engineering. The shaft boring machine includes a propulsion system and a lifting system. Lifting function, the propulsion system provides the propulsion force to push the segment, and when matched with the lowering of the lifting system, vertical excavation can be realized. After the shaft roadheader excavates an effective stroke of the hoisting hydraulic cylinder, it stops the excavation, the propulsion system enters the pressure relief and follow-up state, releases the propulsion force transmitted to the steel strand of the hoisting system, and completes the step change with the hoisting system. The next trip is carried out, bu...

Examples

Embodiment Construction

[0022] In order to make the above objects, features and advantages of the present invention more clearly understood, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0023] In the following description, specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar promotions without departing from the connotation of the present invention. Accordingly, the present invention is not limited by the specific embodiments disclosed below.

[0024] Please refer to figure 1 , figure 1 This is a hydraulic principle diagram of a step change control hydraulic system of a shaft roadheader provided by a specific embodiment of the present invention.

[0025] A specific embodiment of the present invention provides a st...

technical field

[0001] The invention relates to the technical field of shaft boring machines, in particular to a step change control hydraulic system of the vertical shaft boring machines. Background technique

[0002] Shaft boring machine is a kind of construction machinery equipment specially used for the excavation of underground vertical tunnel engineering. The shaft boring machine includes a propulsion system and a lifting system. Lifting function, the propulsion system provides the propulsion force to push the segment, and when matched with the lowering of the lifting system, vertical excavation can be realized. After the shaft roadheader excavates an effective stroke of the hoisting hydraulic cylinder, it stops the excavation, the propulsion system enters the pressure relief and follow-up state, releases the propulsion force transmitted to the steel strand of the hoisting system, and completes the step change with the hoisting system. The next trip is carried out, bu...

Examples

Embodiment Construction

[0022] In order to make the above objects, features and advantages of the present invention more clearly understood, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0023] In the following description, specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar promotions without departing from the connotation of the present invention. Accordingly, the present invention is not limited by the specific embodiments disclosed below.

[0024] Please refer to figure 1 , figure 1 This is a hydraulic principle diagram of a step change control hydraulic system of a shaft roadheader provided by a specific embodiment of the present invention.

[0025] A specific embodiment of the present invention provides a st...

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