Sealed sampler for coal mine geology gas content detection
By using a multi-chamber structure and a sealed sampler with a built-in piston, the problems of large footprint and leakage of traditional samplers are solved, achieving efficient and convenient gas content detection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-26
- Publication Date
- 2026-03-03
AI Technical Summary
Traditional coal mine geological gas content detection samplers require the push rod to be extended, increasing the footprint and making them prone to accidental contact that could lead to sample leakage and affect detection accuracy.
The sealed sampler with a multi-chamber structure includes a gas container and four-opening samplers, with a built-in piston and tubular pull rod. It stores air samples through multiple chambers and uses a built-in piston and one-way gas valve to achieve sealed storage and efficient delivery of samples.
It improves the flexibility and portability of the sampler, reduces the footprint, lowers the risk of sample leakage, and improves detection accuracy.
Smart Images
Figure CN223966322U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of coal mine geological testing technology, and in particular to a sealed sampler for detecting the content of gas in coal mine geological testing. Background Technology
[0002] Coal mine geological gas content detection is a crucial part of coal mine safety production. It involves detecting the concentration of gas in the air in the work area to prevent safety accidents caused by excessively high gas concentrations and to ensure the safety of testing personnel. Traditional coal mine geological gas content detection work requires testing personnel to use special air sampling tools to extract and store air, and then transfer the samples to the laboratory for testing using specialized equipment.
[0003] Traditional coal mine gas detection samplers are generally piston-type sealed containers. Each container can only store one type of sample, and the sampling container push rod needs to be extended when the sample is stored. This increases the space occupied by the sampling container and makes it easy for the push rod to move due to accidental contact, causing the sample inside the sampler to leak or let in outside air, affecting the sample quality and reducing the detection accuracy. Utility Model Content
[0004] This disclosure relates to a sealed sampler for detecting the geological gas content in coal mines. It addresses the problem that, during sample storage, the push rod of the sampling container must be extended, which increases the space occupied by the sampling container and is prone to accidental activation, causing sample leakage or the entry of outside air, affecting sample quality and reducing detection accuracy.
[0005] In a first aspect, this disclosure provides a sealed sampler for detecting the content of geological gas in coal mines, specifically comprising: a gas container, the gas container having a cylindrical structure, four open-type samplers movably connected inside the gas container, each open-type sampler having an opening on its side, the opening of the open-type sampler being tightly and slidably connected to the inner wall of the gas container, an internal piston tightly and slidably connected inside the open-type sampler, a tubular pull rod fixedly connected to the lower end of the internal piston, the tubular pull rod being movably connected inside the open-type sampler, the tubular pull rod being a hollow tube, an inner tube opening at the upper end of the tube wall of the tubular pull rod communicating with the interior of the tubular pull rod, and an exhaust end fixedly connected to the lower end of the tubular pull rod.
[0006] In at least some embodiments, the upper edge of the gas container is bent inward to form a container limiting inner edge, and a central partition with a cross-shaped cross section is fixedly connected inside the gas container. The central partition is slidably connected to an open-type sampler.
[0007] In at least some embodiments, the open sampler has a fan-shaped cross-section, a first piston is fixedly connected to the upper end of the open sampler, a second piston is fixedly connected to the lower end of the open sampler, and a pull plate is fixedly connected to the lower end face of the second piston.
[0008] In at least some embodiments, the top of the open sampler has a vent hole that extends longitudinally through the first piston, and a sealing plug is inserted into the vent hole.
[0009] In at least some embodiments, a lower guide hole is longitudinally provided through the bottom of the gas container and the second piston, and the lower guide hole is tightly slidably connected to the tubular tie rod.
[0010] In at least some embodiments, a sample outlet is provided through the center of the exhaust end, and a one-way valve is fixedly connected inside the sample outlet, with the outlet of the one-way valve facing downwards.
[0011] This utility model provides a sealed sampler for detecting the geological gas content in coal mines, which has the following beneficial effects:
[0012] The gas content detection sampler of this utility model adopts a multi-cavity structure, which can be used to sample air samples from multiple different locations using the same sampler. Compared with the existing single-cavity sampling container, it is not necessary to carry multiple sampling devices when sampling multiple areas, which increases the flexibility of gas sampling and detection in coal mining, reduces the number of samplers to be carried, and is more conducive to the operator's work convenience.
[0013] Furthermore, in this invention, air samples are stored through a cavity formed between the open-type sampler and the inner wall of the gas container. The cavity structure can be opened as the open-type sampler is extracted. After the open-type sampler is completely extracted, it is waved in the area to be tested, allowing air from the area to enter the open-type sampler. The open-type sampler is then inserted into the gas container, sealing and storing the air inside. In the air sample storage state, the open-type sampler retracts inside the gas container, preventing any increase in volume. Compared to the piston-type sampler of the prior art, this saves the space required for the push rod to extend during sample storage, making sample carrying more convenient. Attached Figure Description
[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly described below.
[0015] The accompanying drawings described below are only related to some embodiments of the present invention and are not intended to limit the present invention.
[0016] In the attached diagram:
[0017] Figure 1A schematic diagram of the overall structure of this application is shown;
[0018] Figure 2 A schematic diagram of the structure of the central partition of this application is shown;
[0019] Figure 3 This diagram shows the structure of the open-type sampler in the extracted state.
[0020] Figure 4 A schematic diagram of the internal structure of the gas container of this application is shown;
[0021] Figure 5 A schematic diagram of the structure of the open-type sampler of this application is shown;
[0022] Figure 6 A schematic diagram of the tubular tie rod of this application is shown;
[0023] Figure 7 This application shows Figure 6 A magnified structural diagram of point A in the middle.
[0024] List of reference numerals
[0025] 1. Gas container; 101. Inner edge of container limiting; 102. Central partition; 2. Open-type sampler; 201. First piston; 202. Second piston; 203. Pull plate; 204. Exhaust port; 205. Lower guide hole; 206. Sealing plug; 3. Internal piston; 4. Tubular pull rod; 401. Inner tube opening; 402. Exhaust end; 403. Sample outlet; 404. One-way valve. Detailed Implementation
[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the described embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0027] Example 1: Please refer to Figures 1 to 7 :
[0028] This utility model proposes a sealed sampler for detecting the geological gas content in coal mines, comprising: a gas container 1, which is cylindrical in structure; four open-type samplers 2 are movably connected inside the gas container 1; each open-type sampler 2 has an opening on its side; the openings of the open-type samplers 2 are tightly slidably connected to the inner wall of the gas container 1; an internal piston 3 is tightly slidably connected inside the open-type samplers 2; a tubular pull rod 4 is fixedly connected to the lower end of the internal piston 3; the tubular pull rod 4 is movably connected inside the open-type samplers 2; the tubular pull rod 4 is a hollow tube; and the tube wall of the tubular pull rod 4 has... An inner tube port 401 is provided at one end, which connects to the inside of the tubular pull rod 4. An exhaust end 402 is fixedly connected to the lower end of the tubular pull rod 4. When sampling, the open sampler 2 is pulled out from the lower opening of the gas container 1, so that the opening of the open sampler 2 is completely exposed to the air. The open sampler 2 is waved to allow air to enter the interior of the open sampler 2. The open sampler 2 is then inserted again from the bottom opening of the gas container 1, so that the opening of the open sampler 2 fits against the inner wall of the gas container 1 to form a sealed space, so that the air sample is stored inside the open sampler 2.
[0029] In this embodiment, the upper edge of the gas container 1 is bent inward to form a container limiting inner edge 101. A central partition 102 with a cross-shaped cross section is fixedly connected inside the gas container 1. The central partition 102 is slidably connected to the open-type sampler 2. The central partition 102 provides four cavities, allowing simultaneous storage of four air samples. Compared with existing single-cavity sampling containers, this eliminates the need to carry multiple sampling devices when sampling multiple areas, increasing the flexibility of gas sampling and detection in coal mines and reducing the number of samplers required.
[0030] In this embodiment, the open-type sampler 2 has a fan-shaped cross-section. A first piston 201 is fixedly connected to the upper end of the open-type sampler 2, and a second piston 202 is fixedly connected to the lower end of the open-type sampler 2. A pull plate 203 is fixedly connected to the lower end face of the second piston 202. Through the action of the first piston 201 and the second piston 202, the stability of the open-type sampler 2 inside the gas container 1 is improved, and the probability of air leakage inside the open-type sampler 2 is reduced.
[0031] In Example 2, based on Example 1, an exhaust port 204 is longitudinally penetrating the top of the open-type sampler 2 and the first piston 201. A sealing plug 206 is inserted into the exhaust port 204 to seal it. A lower guide hole 205 is longitudinally penetrating the bottom of the gas container 1 and the second piston 202. The lower guide hole 205 is tightly slidably connected to the tubular pull rod 4. A sample outlet 403 is penetrating the center of the exhaust end 402. The sample outlet 403 is internally solidified. A one-way air valve 404 is fixedly connected, with the outlet of the one-way air valve 404 facing downwards. When the sampling container is transferred to the laboratory for testing, the sample outlet 403 is connected to the detector input tube, and the exhaust end 402 is slowly pulled outwards. As the built-in piston 3 moves, the air located below the built-in piston 3 is compressed, so that the air below the built-in piston 3 enters the tubular pull rod 4 through the inner tube port 401, and finally passes through the one-way air valve 404 and the sample outlet 403 to be delivered to the testing instrument for testing.
[0032] The working principle of this embodiment is as follows: First, when sampling air, the sampler is taken out from the bottom opening of the gas container 1, so that the opening of the sampler 2 is completely exposed to the air. The sampler 2 is swung to allow air to enter the sampler 2. The sampler 2 is then inserted back into the bottom opening of the gas container 1, so that the opening of the sampler 2 fits against the inner wall of the gas container 1 to form a sealed space, so that the air sample is stored inside the sampler 2. After being transferred to the gas detection laboratory, the sample outlet 403 is connected to the detector input pipe, and the exhaust end 402 is slowly pulled outward. As the built-in piston 3 moves, the air below the built-in piston 3 is compressed, so that the air below the built-in piston 3 enters the tubular pull rod 4 through the inner tube 401, and finally passes through the one-way valve 404 and the sample outlet 403 to be transported to the detection instrument for detection. This completes the sampling and transfer of gas content.
[0033] The following points should be noted in this article:
[0034] 1. The accompanying drawings of the embodiments disclosed herein only relate to the structures involved in the embodiments disclosed herein; other structures can be referred to in general design.
[0035] 2. Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.
[0036] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.
Claims
1. A sealed sampler for detecting the geological gas content in coal mines, comprising: A gas container (1) is characterized in that the gas container (1) is cylindrical in shape, and four open-type samplers (2) are movably connected inside the gas container (1). The open-type samplers (2) have openings on their sides, and the openings of the open-type samplers (2) are tightly slidably connected to the inner wall of the gas container (1). An internal piston (3) is tightly slidably connected inside the open-type samplers (2). A tubular pull rod (4) is fixedly connected to the lower end of the internal piston (3). The tubular pull rod (4) is movably connected inside the open-type samplers (2). The tubular pull rod (4) is a hollow tube. An inner tube opening (401) is opened at the upper end of the tube wall of the tubular pull rod (4). The inner tube opening (401) communicates with the inside of the tubular pull rod (4). An exhaust end (402) is fixedly connected to the lower end of the tubular pull rod (4).
2. The sealed sampler for detecting geological gas content in coal mines according to claim 1, characterized in that, The gas container (1) has an inner edge (101) that is bent inward at the upper edge inside. A central partition (102) with a cross-shaped cross section is fixedly connected inside the gas container (1). The central partition (102) is slidably connected to the open sampler (2).
3. The sealed sampler for detecting geological gas content in coal mines according to claim 1, characterized in that, The open-type sampler (2) has a fan-shaped cross-section. The upper end of the open-type sampler (2) is fixedly connected to a first piston (201), and the lower end of the open-type sampler (2) is fixedly connected to a second piston (202). The lower end face of the second piston (202) is fixedly connected to a pull plate (203).
4. A sealed sampler for detecting geological gas content in coal mines according to claim 3, characterized in that, The top of the open sampler (2) is longitudinally connected to the first piston (201) and has an exhaust hole (204), and a sealing plug (206) is inserted into the exhaust hole (204).
5. A sealed sampler for detecting geological gas content in coal mines according to claim 4, characterized in that, The bottom of the gas container (1) and the second piston (202) are longitudinally connected by a lower guide hole (205), and the lower guide hole (205) is tightly slidably connected to the tubular tie rod (4).
6. A sealed sampler for detecting geological gas content in coal mines according to claim 1, characterized in that, The exhaust end (402) has a sample outlet (403) through the center, and a one-way valve (404) is fixedly connected inside the sample outlet (403), with the outlet of the one-way valve (404) facing downward.