Non-joint single hydraulic prop for blasting mining

A single hydraulic prop and joint gun technology, applied in mining equipment, props/supports, earthwork drilling, etc., can solve the problems of many processing procedures, poor anti-eccentric load capacity, and many equipment, reducing labor intensity, resisting Strong eccentric load capacity and the effect of expanding the scope of use

CN104533476AInactive Publication Date: 2015-04-22HUAIBEI ANLAI ELECTROMECHANICAL EQUIP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2015-04-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a non-joint single hydraulic prop for blasting mining, and aims at solving the problems such as short travel, high minimum height, easy breaking and a plurality of processing processes of the existing device. The non-joint single hydraulic prop for blasting mining is characterized in that a movable prop body is a complete hollow barrel shaped body; the bottom end is in soft connection with a hollow piston body; a sealing block is mounted in the top end of the movable prop body, and a top cover is mounted at the outer part of the top end; the piston body is mounted in the base; a D-shaped sealing ring I and a guide ring are mounted between the piston body and an oil cylinder; the lower part of the oil cylinder is completely sealed through the base; the base is connected with the oil cylinder through a connecting steel wire I; a three-purpose valve seat is firmly welded on the outer wall of the movable prop body on the lower surface of the top cover. The non-joint single hydraulic prop for blasting mining is large in travel and small in minimum height; the movable prop is of a complete movable prop structure, so that the possibility of a joint, a prop head, a weld joint and breaking can be avoided; the load-deflection resistance is high; the base is in a form of a coated base, so that the bottom part of the oil cylinder is greatly protected; the prop can be quickly returned, and thus the safety is improved; the processing process is simple, and few materials are used; the piston body is of a dirt storage form and can be used for storing coal dust and other impurities entering the movable prop.
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Description

technical field

[0001] The invention relates to a hydraulic prop, in particular to a single hydraulic prop used in coal mine blasting coal mining face. Background technique

[0002] At present, the DZ single hydraulic prop for mining has been used in coal mines for 36 years since it was introduced from abroad in 1978, and it has played an important role in the development of my country's coal industry and in saving wood. Because this type of pillar is suitable for blast mining coal mining face, its biggest advantage is that the outer surface of the live pillar is not afraid of blasting and bumping. Therefore, this type of product is still used in major coal mines across the country.

[0003] However, during the use of this type of pillar for more than 30 years, its fatal shortcomings have been exposed as follows:

[0004] 1. The stroke is short and the minimum height is high. For example, the DZ25 pillar has a stroke of 800mm and a minimum height of 1700mm; the DZ35 pillar...

Examples

Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings.

[0024] As shown in the accompanying drawings, the present invention is mainly composed of a base 1, an oil cylinder 11, a live cylinder 13, a return spring 14, a handle body 15, a top cover 23, a three-purpose valve seat body 25 and a seal, and the whole is streamlined. The oil cylinder 11 with an inner diameter of 90 or 100 mm is one of the important parts of the pillar, and its main function is to store liquid and bear the expansion force of the hydraulic pressure and the tension and tension from the external force of the pillar.

[0025] The live cylinder 13 is a hollow cylindrical body, and its main function is the lifting and lowering of the pillar, and the transmission of pressure from the top plate. Its lower end is softly connected to the hollow piston body 7 through an O-shaped sealing ring III10. The piston body 7 is a dirt storage type, which can store impu...