Coal seam outburst prevention gas content measuring device capable of achieving underground measurement

Abstract

The utility model relates to the technical field of coal mine gas measurement, and discloses a coal seam outburst prevention gas content measuring device capable of measuring underground, which comprises a measuring mounting box, a first mounting cavity is arranged at the bottom of the measuring mounting box, and a second mounting cavity is arranged on the side edge of the first mounting cavity. The gas desorption instrument and the sample storage tank are arranged on the determination mounting box, and the movable wheels are arranged at the bottom of the determination mounting box, so that the device is more convenient to move underground, and the gas content of an underground coal seam can be rapidly and effectively determined; the method does not need to be transferred on the ground where samples are needed, the coal seam gas content measuring time is greatly saved, the gas content measuring efficiency is higher, the value of the gas content can be effectively obtained in time, a user can rapidly predict the outburst danger of the coal seam gas content on site, and the user experience is improved. And the accuracy of gas control work is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of coal mine gas measurement technology, specifically a coal seam gas content measuring device that can be used for underground measurement. Background Technology

[0002] The original gas content of coal seams is one of the important parameters for predicting gas emission, evaluating the effectiveness of gas drainage, and predicting the risk of coal and gas outbursts. It is the foundation of all gas control measures. How to quickly and accurately determine the original gas content of coal seams has always been an urgent problem to be solved in coal mine gas control work.

[0003] A search revealed that Chinese Patent Publication No. CN 111929118 A discloses a device for measuring coal seam gas content in underground mines. The device includes a test chamber with a base plate fixedly connected to its bottom. Jacks are fixedly mounted at the four corners of the base plate, and wheels are fixedly connected to the bottom of each jack. A sampler is located outside the test chamber and connected to a first collection box, which is fixedly connected to the test chamber. A second collection box is fixedly mounted at the bottom of the test chamber and connected to the first collection box via a discharge pipe. This invention, by incorporating a vacuum tube and a negative pressure device within the test chamber, allows for complete storage of coal seam gas within the vacuum tube, resulting in accurate measurements of the gas content by the analyzer. The wheels and jacks facilitate the movement of the test chamber, and the height can be adjusted according to the underground conditions for convenient measurement. The device is easy to use and highly practical.

[0004] The gas content measuring device in the aforementioned patent still has certain shortcomings. As most existing underground coal seam gas content measurements are carried out by taking samples from underground and bringing them to the surface for content measurement using a gas desorption instrument, this method is time-consuming and inefficient, and cannot quickly predict the outstanding danger of coal seam gas content on the ground, thus affecting the timeliness of gas prevention and control work. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a coal seam gas content measuring device that can be used for underground measurement. This solves the problem that most existing underground coal seam gas content measurements rely on underground sampling and bringing the samples to the surface for content determination using a gas desorption instrument. This method is time-consuming and inefficient, and cannot quickly predict the coal seam gas content and its potential danger in a timely manner, thus affecting the timeliness of gas prevention and control work.

[0006] This utility model provides the following technical solution: a coal seam gas content measuring device that can be measured underground, including a measuring installation box, wherein a first installation cavity is provided at the bottom of the measuring installation box, and a second installation cavity is provided on the side of the first installation cavity;

[0007] The first mounting cavity contains a battery pack, the second mounting cavity contains a gas desorber, and the gas desorber has a barometer mounted on its side. The top of the measuring mounting box has two top mounting slots, each containing a sample storage container. The top of each sample storage container is covered with a sealing cap. A gas supply pipe is located on the top side of each sample storage container. The gas supply pipe is connected to the gas desorber via a measuring gas supply pipe. The top of the measuring mounting box has a top placement slot, and the side of the top placement slot has a top limiting slot.

[0008] Preferred technical solution 1: A sampling motor is provided in the top placement slot, and a core drilling tube is threadedly fixed to the end of the sampling motor.

[0009] Preferred technical solution 2: Bottom connecting blocks are evenly arranged around the bottom of the measuring and mounting box, and each bottom connecting block is equipped with a moving wheel.

[0010] Preferred technical solution three: The side of the measuring installation box is provided with a push handle for easy pushing.

[0011] This solution makes it easier for users to push the measurement and installation box.

[0012] Preferred technical solution four: Limiting strips are provided on both sides of the first mounting cavity and the second mounting cavity.

[0013] This solution enables the battery pack and gas desorption device to be more stable after being fixed in place.

[0014] Preferred technical solution five: The sampling motor is equipped with a power supply battery pack.

[0015] This solution allows the sampling motor to be carried freely without the constraints of power lines, enabling it to be used for drilling and sampling.

[0016] Compared with the prior art, this utility model provides a coal seam gas content measuring device that can be measured underground, which has the following beneficial effects:

[0017] (1) This utility model is equipped with a gas desorption instrument and a sample storage tank on the measuring installation box. The bottom of the measuring installation box is equipped with moving wheels, which makes it easier to move the device underground. The core drilling pipe connected to the sampling motor can drill a hole in the coal seam at a specified location to take a sample. The sampled sample is placed in the sample storage tank. The sample storage tank is connected to the measuring gas supply pipe through a gas supply pipe, which connects the gas gas in the sample to the gas desorption instrument. This allows for the rapid and effective determination of the gas content of the underground coal seam. With this device, the surface transfer of the sample is no longer required, which greatly saves the time for measuring the gas content of the coal seam. The gas content measurement efficiency is faster, and the gas content value can be obtained in a timely and effective manner. This allows users to quickly and accurately predict the gas content of the coal seam on the ground, which greatly improves the accuracy of gas prevention and control work. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0019] Figure 2 This is a side view of the structure of this utility model;

[0020] Figure 3 For the present utility model Figure 2 Enlarged view of the top limiting groove structure;

[0021] Figure 4 For the present utility model Figure 2 A schematic diagram of the structure of the medium sample storage tank.

[0022] In the diagram: 1. Measurement mounting box; 2. First mounting cavity; 3. Second mounting cavity; 4. Battery pack; 5. Gas desorber; 6. Barometer; 7. Top mounting slot; 8. Sample storage container; 9. Sealed closure cover; 10. Gas supply connecting pipe; 11. Measurement gas supply pipe; 12. Top placement slot; 13. Top limiting slot; 14. Drilling motor; 15. Core drilling tube; 16. Bottom connecting block; 17. Moving wheels. Detailed Implementation

[0023] Please see Figure 1-4 ,

[0024] Example 1: A coal seam gas content measuring device that can be measured underground includes a measuring and mounting box 1, a first mounting cavity 2 is provided at the bottom of the measuring and mounting box 1, and a second mounting cavity 3 is provided on the side of the first mounting cavity 2.

[0025] A battery pack 4 is installed in the first mounting cavity 2. A gas desorber 5 is installed in the second mounting cavity 3. A barometer 6 is installed on the side of the gas desorber 5. Two top mounting slots 7 are opened at the top of the measuring mounting box 1. Each top mounting slot 7 is equipped with a sample storage tank 8. The top of the sample storage tank 8 is covered with a sealing cap 9. A gas supply connecting pipe 10 is installed on the top side of the sample storage tank 8. The gas supply connecting pipe 10 is connected to the gas desorber 5 through a measuring gas supply pipe 11. A top placement slot 12 is opened at the top of the measuring mounting box 1. A top limiting slot 13 is opened on the side of the top placement slot 12. A sampling motor 14 is installed in the top placement slot 12. A core drill tube 15 is threadedly fixed to the end of the sampling motor 14. Bottom connecting blocks 16 are evenly arranged around the bottom of the measuring mounting box 1. Each bottom connecting block 16 is equipped with a moving wheel 17.

[0026] Example 2: The difference between this example and Example 1 is that the side of the measuring installation box 1 is provided with a push handle for easy pushing.

[0027] This makes it easier for users to push the measuring and installation box 1.

[0028] Example 3: The difference between this example and Example 1 is that limit strips are provided on both sides of the first mounting cavity 2 and the second mounting cavity 3.

[0029] This makes the battery pack 4 and the gas desorber 5 more stable after being limited and fixed.

[0030] Example 4: The difference between this example and Example 1 is that the sampling motor 14 is equipped with a power supply battery pack.

[0031] This eliminates the need for power lines on the sampling motor 14, allowing it to be carried freely for drilling and sampling.

[0032] In this embodiment, since the existing method of measuring the gas content of underground coal seams mostly involves taking samples from underground and bringing them to the surface for measurement using a gas desorption instrument, this method is time-consuming and inefficient, and cannot quickly predict the outstanding danger of coal seam gas content on the ground, thus affecting the timeliness of gas prevention and control work.

[0033] In summary, in practical implementation, when users need to measure the gas content in underground coal seams, they can set the gas desorption instrument 5 and the sample storage tank 8 on the measurement installation box 1. The measurement installation box 1 is evenly equipped with moving wheels 17 around its bottom, which allows users to push the device to any location in the underground coal seam where the gas needs to be measured, making it more flexible and convenient to use.

[0034] Next, the user can remove the sampling motor 14 from the top placement slot 12, install the core drill pipe 15 on the end of the sampling motor 14, and then start the sampling motor 14 to drive the core drill pipe 15 to drill and sample the coal seam where gas needs to be measured. The sampled coal seam core is then placed in the sample storage tank 8, and the top of the sample storage tank 8 is closed by the sealing cap 9. The side of the gas transmission pipe 10 is connected to the gas desorption instrument 5 through the gas transmission pipe 11, so that the gas desorption instrument 5 can quickly and conveniently measure the gas content in the sampled coal seam directly.

[0035] There is no need to transfer samples to the ground for analysis, which greatly saves the time for measuring coal seam gas content. The gas content measurement efficiency is faster, and the gas content value can be obtained in a timely and effective manner. This allows users to quickly predict the outstanding danger of coal seam gas content on the ground, which greatly improves the accuracy of gas prevention and control work. The barometer 6 set on the side of the gas desorption instrument 5 can be used to measure the atmospheric pressure at the underground sampling point, providing relevant parameters for subsequent calculation of gas content. The entire gas content measurement process is more convenient and efficient.

Claims

1. A coal seam gas content measuring device for underground measurement, comprising a measuring and mounting box (1), characterized in that: The bottom of the measuring installation box (1) is provided with a first installation cavity (2), and the side of the first installation cavity (2) is provided with a second installation cavity (3); A battery pack (4) is installed in the first mounting cavity (2), a gas desorber (5) is installed in the second mounting cavity (3), a barometer (6) is installed on the side of the gas desorber (5), two top mounting slots (7) are opened at the top of the measuring mounting box (1), a sample storage tank (8) is installed in each of the top mounting slots (7), a sealing cap (9) is provided on the top of the sample storage tank (8), a gas supply connecting pipe (10) is provided on the top of the side of the sample storage tank (8), the gas supply connecting pipe (10) is connected to the gas desorber (5) through a measuring gas supply pipe (11), a top placement slot (12) is opened at the top of the measuring mounting box (1), and a top limiting slot (13) is opened on the side of the top placement slot (12).

2. The coal seam gas content measuring device for underground measurement according to claim 1, characterized in that: A sampling motor (14) is provided in the top placement slot (12), and a core drilling tube (15) is threadedly fixed to the end of the sampling motor (14).

3. The coal seam gas content measuring device for underground measurement according to claim 2, characterized in that: Bottom connecting blocks (16) are evenly arranged around the bottom of the measuring installation box (1), and each bottom connecting block (16) is equipped with a moving wheel (17).

4. The coal seam gas content measuring device for underground measurement according to claim 3, characterized in that: The measuring installation box (1) is provided with a push handle on its side for easy pushing.

5. The coal seam gas content measuring device for underground measurement according to claim 4, characterized in that: Limiting strips are provided on both sides of the first mounting cavity (2) and the second mounting cavity (3).

6. The coal seam gas content measuring device for underground measurement according to claim 5, characterized in that: The sampling motor (14) is equipped with a power supply battery pack.

Images