Coal seam gas sampling device

By designing the handheld box and sampling tube to work together, the problem of gas overflow after sampling was solved, achieving safe collection of gas samples and accurate detection data, thus ensuring the reliability of gas detection and the scientific nature of assessment.

CN224382904UActive Publication Date: 2026-06-19HUNAN PROVINCE MEIYEJITUANJIAHE MINING IND CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
HUNAN PROVINCE MEIYEJITUANJIAHE MINING IND CO LTD
Filing Date
2025-07-09
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

Existing gas sampling devices are prone to gas overflow after sampling, increasing the risk of explosion. Furthermore, leaks can lead to deviations in detection data, affecting the assessment of gas occurrence and emission patterns.

Method used

A coal seam gas sampling device was designed, comprising a handheld box, a sampling tube, a piston, a rubber stopper, an adjustment component, and a drive component. By adjusting the engagement of the rubber stopper and the movement of the piston, negative pressure is achieved to collect gas and prevent overflow. The device also cleans the debris in the sampling hole with a drill bit to ensure the integrity of the sample.

Benefits of technology

It effectively prevents gas overflow and leakage, reduces the risk of explosion, improves the accuracy of detection data and the reliability of assessment, and ensures the representativeness and originality of gas samples.

✦ Generated by Eureka AI based on patent content.

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    Figure CN224382904U_ABST
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Abstract

This utility model relates to the field of gas sampling technology, specifically disclosing a coal seam gas sampling device, including a handheld box and a sampling tube rotatably connected to the handheld box. The sampling tube has an inner cavity, and a piston is slidably connected within the inner cavity. A collection chamber is formed at the top of the inner wall of the inner cavity, and sampling holes are formed on both sides of the collection chamber. This utility model, by setting up a sampling tube, inner cavity, piston, rubber stopper, gas outlet, sampling holes, adjustment component, and moving component, allows the moving component to move the piston, thereby creating negative pressure within the inner cavity. Gas at the bottom of the piston is discharged through the gas outlet, reducing the resistance to pulling the piston. The adjustment component adjusts the rubber stopper to disengage from the sampling holes, allowing gas to enter the inner cavity. After collection, the rubber stopper is adjusted to engage with the sampling holes, preventing gas overflow and leakage, thus reducing the risk of explosion, while also reducing deviations in detection data and improving assessment accuracy.
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