Full-automatic gas ultralimit preventing device

Abstract

The invention discloses a full-automatic gas ultralimit preventing device, which comprises a high-pressure capsule hole fixing apparatus, an automatic reset hole sealing apparatus and a buffer box which are sequentially connected. The high-pressure capsule hole fixing apparatus utilizes capsules to replace cement to serve as a hole fixing medium, so that hole fixing time is greatly reduced, and reuse is further achieved; the automatic reset hole sealing apparatus achieves a normally-closed function through force provided by a nitrogen spring, can clamp a drill rod under the situation without an external power source and achieves the purpose of plugging burst gas. In general, the gas ultralimit preventing device improves work efficiency, achieves an automatic plugging function in gas emission moment, also can achieve the plugging function when losing the power source and effectively ensures construction safety.

Description

technical field [0001] The invention belongs to the field of drilling and mining of soil layers or rocks, and in particular relates to a fully automatic gas overrun prevention device. Background technique [0002] In the process of coal mining, there are many natural disasters, among which gas disaster is the most common one. At present, the main method of gas disaster control is to drill holes first, and then to extract. The holes constructed in the areas where the gas outburst is not serious generally do not need special measures, while the holes constructed in the places where the gas outburst is serious need special protection. [0003] The construction protection device for the existing gas breakout hole is as attached figure 1 As shown, the device consists of a hole-fixing cement 1, a casing 2, and a double-cylinder sealer 3. When in use, first use a drilling rig to construct a 10-15m rock hole 4, then bury the casing 2 in the hole and plug the gap between the outer ...

AI Technical Summary

Problems solved by technology

[0005] (1) Long construction period: In order to ensure the strength between the casing and the hole wall, the rock hole that needs to be constructed is long, and cement is used as the adhesive, so the solidification time is long. Generally, it takes a long time to successfully bury such a hole-fixing device. about 3 days;

[0006] (2) High cost: due to the long rock holes for construction, there are many casings and cement used correspondingly, and many man-hours are required;

[0007] (3) Non-reusable: After the casing is solidified in the hole with cement, the casing can only be used in the hole and cannot be reused;

[0008] (4) The plugging is not strict and there is leakage: the clamped drill pipe will wear and become thinner after a period of use. Since the slips of the double-cylinder hole sealer are rigid materials, when the drill pipe becomes thinner, the hole sealer will During the clamping process, there will be a problem that the drill pipe cannot be clamped, that is, there is a gap between the slips and the drill pipe, so that the plugging effect cannot be achieved;

[0009] (5) Possibility of failure: Since the hole sealer uses two double-acting cylinders for clamping and loosening, when there is no external high-pressure oil (when the gas protrudes seriously, the working surface will automatically power off), the hole sealer cannot kick in

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