Gas content measuring device

Abstract

The utility model discloses a gas content measuring device which comprises a coal sample tank and a gas measuring instrument, an insertion pipe connected with an inner cavity of the coal sample tank is arranged on a tank cover of the coal sample tank, a gas pipe used for conveying gas to be detected is arranged at the detection end of the gas measuring instrument, an annular groove is formed in the gas pipe, and the gas content measuring instrument is arranged in the annular groove. A second sealing gasket is arranged on the inner wall of the annular groove, the end, away from the coal sample tank, of the insertion pipe is inserted into the annular groove and tightly pressed on the end face of the second sealing gasket, and an annular limiting plate used for limiting the position of the insertion pipe is arranged on the outer wall of the insertion pipe. According to the gas content measuring device, the limiting cylinder can be installed on the outer wall of the gas pipe and the outer wall of the intubation pipe to connect and fix the gas pipe and the intubation pipe, the intubation pipe is prevented from loosening or falling off in the gas pipe, gas leakage caused by loosening or falling off of the intubation pipe in the gas pipe is avoided, the stability of connection between the gas pipe and the intubation pipe is improved, and the service life of the gas pipe and the intubation pipe is prolonged. And the accuracy of a gas measurement result is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of gas content measuring equipment, in particular to a gas content measuring device. Background Art

[0002] Gas content determination is an important task in mining engineering. It is mainly used to measure the gas content in coal seams or other samples. Among them, the gas meter and the coal sample tank are two key components in the gas content determination system. They work together to complete the accurate determination of the gas content. The gas meter, as the main measuring equipment, is responsible for receiving the gas released from the coal sample tank and accurately measuring the concentration, volume or pressure of the gas through internal sensors or analysis mechanisms. The coal sample tank is used as a collection container for gas, which is used to store coal samples under specific conditions and release gas for measurement by the gas meter.

[0003] However, when using a gas measuring instrument to measure the gas content in a coal sample tank, it is necessary to connect the cannula on the coal sample tank to the gas pipe on the gas measuring instrument, and the existing way of connecting the gas pipe and the cannula is to directly insert the cannula into the gas pipe to transport the gas, and the cannula is easy to shake or fall off on the gas pipe, resulting in gas leakage, affecting the accuracy of the measurement result. Therefore, those skilled in the art provide a gas content measuring device to solve the problems raised in the above background technology. Utility Model Content

[0004] The purpose of the utility model is to provide a gas content measuring device to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A gas content measuring device comprises: a coal sample tank and a gas measuring instrument, wherein a cannula connected to the inner cavity of the coal sample tank is arranged on the tank cover of the coal sample tank, and an air pipe for conveying the gas to be detected is arranged at the detection end of the gas measuring instrument, an annular groove is opened inside the air pipe, and a second sealing gasket is arranged on the inner wall of the annular groove, one end of the cannula away from the coal sample tank is plugged into the inside of the annular groove and pressed tightly against the end face of the second sealing gasket, and an annular limiting plate for limiting its position is arranged on the outer wall of the cannula, a first sealing gasket is arranged on the end face of the annular limiting plate, the air pipe is sleeved on the outside of the cannula and pressed tightly against the end face of the first sealing gasket, and a threaded ring is arranged on the outer wall of the air pipe, and the outer wall of the cannula is located below the annular limiting plate and is sleeved with a limiting cylinder, the limiting cylinder surrounds the outside of the annular limiting plate and is threadedly installed on the outer wall of the air pipe, and a limiting ring is threadedly installed on the outer wall of the air pipe, and the limiting ring is tightly attached to the end face of the limiting cylinder.

[0007] Preferably, the inner wall of the trachea is flush with the inner wall of the cannula.

[0008] Preferably, the second sealing gasket and the first sealing gasket are both made of rubber.

[0009] Preferably, the diameter of the annular limiting plate is the same as the diameter of the trachea, and the outer wall of the annular limiting plate is flush with the outer wall of the trachea.

[0010] Preferably, a through hole communicating with the inner cavity of the limiting cylinder is formed at the bottom thereof, the limiting cylinder is sleeved on the outer wall of the insert tube through the through hole and slides on the outer wall, and the opening area of ​​the through hole is smaller than the end surface area of ​​the annular limiting plate.

[0011] Preferably, the inner cavity of the limiting cylinder is provided with a first thread groove matched with the thread ring, and the limiting cylinder is installed on the outer wall of the trachea through the matching threads of the first thread groove and the thread ring.

[0012] Preferably, a second thread groove cooperating with the thread ring is opened inside the limiting ring, and the limiting ring is installed on the outer wall of the trachea through the cooperation between the second thread groove and the thread ring, and the internal thread of the second thread groove is opposite to the internal thread of the first thread groove.

[0013] Compared with the prior art, the advantages of the utility model are:

[0014] By setting the annular limiting plate and the limiting cylinder, when installing the cannula in the trachea, the cannula can be first inserted into the annular groove inside the trachea to make the inner cavity wall of the cannula flush with the inner cavity wall of the trachea, and then the second sealing gasket is used to seal the gap between the cannula and the trachea to prevent gas from leaking from the gap between the cannula and the trachea, and then the limiting cylinder is screwed and the limiting cylinder is threadedly installed on the outer wall of the trachea to complete the fixation between the trachea and the cannula. At the same time, the limiting cylinder is used to press the annular limiting plate against the end face of the trachea, and the gap between the trachea and the annular limiting plate is sealed by the first sealing gasket to prevent gas from leaking from the gap between the trachea and the annular limiting plate. Finally, Twist the limiting ring to allow the limiting ring to tighten the limiting cylinder on the outer wall of the trachea to prevent the limiting cylinder from loosening, thereby completing the connection between the trachea and the cannula. The limiting cylinder can be installed on the outer walls of the trachea and the cannula to connect and fix them to prevent the cannula from loosening or falling off in the trachea, avoiding gas leakage caused by the cannula loosening or falling off in the trachea, improving the stability of the connection between the trachea and the cannula, ensuring the accuracy of the gas measurement results, and also being able to perform double sealing between the trachea and the cannula through the first sealing gasket and the second sealing gasket to prevent gas leakage from the connection between the trachea and the cannula, ensuring the sealing of the connection between the trachea and the cannula, and having strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1is a three-dimensional schematic diagram of a gas content measuring device according to an embodiment of the utility model;

[0016] Figure 2 This is a schematic diagram of the disassembly of the cannula and the trachea according to an embodiment of the utility model;

[0017] Figure 3 This is a schematic diagram of the connection between the cannula and the trachea according to an embodiment of the utility model;

[0018] Figure 4 is a cross-sectional view of a trachea according to an embodiment of the utility model;

[0019] Figure 5 It is a three-dimensional schematic diagram of a limiting cylinder according to an embodiment of the utility model.

[0020] In the figure: 1, coal sample tank; 11, insert tube; 12, annular limit plate; 121, first sealing gasket; 13, limit tube; 131, first thread groove; 132, through hole; 2, gas measuring instrument; 21, gas pipe; 211, annular groove; 212, second sealing gasket; 213, thread ring; 22, limit ring; 221, second thread groove. DETAILED DESCRIPTION

[0021] In the description of the present utility model, it should be understood that the terms "center", "lateral", "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more. In addition, the term "including" and any variation thereof are intended to cover non-exclusive inclusions.

[0022] Combination Figure 1-Figure 5As shown, a gas content determination device comprises: a coal sample tank 1 and a gas determination instrument 2, the tank cover of the coal sample tank 1 is provided with a cannula 11 connected to the inner cavity of the coal sample tank 1, the detection end of the gas determination instrument 2 is provided with a gas pipe 21 for conveying the gas to be detected, the inside of the gas pipe 21 is provided with an annular groove 211, and the inner wall of the annular groove 211 is provided with a second sealing gasket 212, the end of the cannula 11 away from the coal sample tank 1 is plugged into the inside of the annular groove 211 and pressed against the end surface of the second sealing gasket 212, and the outer wall of the cannula 11 is provided with a gasket for An annular limiting plate 12 is provided to limit its position, and a first sealing gasket 121 is arranged on the end face of the annular limiting plate 12. The trachea 21 is sleeved on the outside of the cannula 11 and pressed tightly against the end face of the first sealing gasket 121. In addition, a threaded ring 213 is arranged on the outer wall of the trachea 21. The outer wall of the cannula 11 is located below the annular limiting plate 12 and is sleeved with a limiting cylinder 13. The limiting cylinder 13 surrounds the outside of the annular limiting plate 12 and is threadedly installed on the outer wall of the trachea 21. A limiting ring 22 is threadedly installed on the outer wall of the trachea 21, and the limiting ring 22 is tightly attached to the end face of the limiting cylinder 13.

[0023] In one embodiment, when installing the cannula 11 in the trachea 21, the cannula 11 can be first inserted into the annular groove 211 inside the trachea 21, so that the inner cavity wall of the cannula 11 is flush with the inner cavity wall of the trachea 21, and the cannula 11 is pressed against the end face of the second sealing gasket 212 on the inner wall of the trachea 21, and the second sealing gasket 212 is used to seal the gap between the cannula 11 and the trachea 21, and then the limiting cylinder 13 is twisted to allow the limiting cylinder 13 to be installed on the outer wall of the trachea 21 through the matching threads of the first thread groove 131 and the thread ring 213. At the same time, the limiting cylinder 13 is allowed to slide upward on the outer wall of the cannula 11 through the through hole 132, and the annular limiting plate 12 is pressed against the end face of the trachea 21, and the first sealing gasket is used to seal the gap between the cannula 11 and the trachea 21. 121 seals the gap between the trachea 21 and the annular limiting plate 12, and finally, screws the limiting ring 22 to allow the limiting ring 22 to tighten the limiting cylinder 13 on the outer wall of the trachea 21 through the cooperation of the second thread groove 221 and the thread ring 213 to prevent the limiting cylinder 13 from loosening, thereby completing the connection and fixation of the trachea 21 and the cannula 11, and the limiting cylinder 13 can be installed on the trachea 21 and the outer wall of the cannula 11 to connect and fix them, preventing the cannula 11 from loosening or falling off in the trachea 21, avoiding gas leakage caused by the cannula 11 loosening or falling off in the trachea 21, improving the stability of the connection between the trachea 21 and the cannula 11, and ensuring the accuracy of the gas measurement results.

[0024] In one embodiment, when the trachea 21 and the cannula 11 are used to transport gas to the gas measuring instrument 2, the second sealing gasket 212 can first seal the gap between the cannula 11 and the trachea 21 to prevent gas leakage from the gap between the cannula 11 and the trachea 21, and then the first sealing gasket 121 can seal the gap between the trachea 21 and the annular limiting plate 12 to prevent gas leakage from the gap between the trachea 21 and the annular limiting plate 12, thereby ensuring the sealing of the connection between the trachea 21 and the cannula 11.

[0025] In one embodiment, when the limiting cylinder 13 is installed on the outer wall of the trachea 21, the limiting cylinder 13 can slide upward on the outer wall of the cannula 11 through the through hole 132, and the annular limiting plate 12 can be pressed tightly against the end face of the trachea 21. The annular limiting plate 12 can cover the end face of the trachea 21 through the first sealing gasket 121 and seal its opening, so that the cannula 11 can be pressed tightly into the trachea 21 to prevent the cannula 11 from loosening or falling off inside the trachea 21, thereby ensuring the stability of the installation of the cannula 11.

[0026] In one embodiment, after the limiting cylinder 13 is installed on the outer wall of the trachea 21, the limiting ring 22 can be screwed so that the limiting ring 22 can tighten the limiting cylinder 13 on the outer wall of the trachea 21 through the cooperation of the second thread groove 221 and the thread ring 213 to prevent the limiting cylinder 13 from loosening, thereby avoiding the loosening or falling off of the cannula 11 inside the trachea 21 due to the loosening of the limiting cylinder 13, thereby further improving the stability of the cannula 11 and the trachea 21.

[0027] The working principle of the utility model is: when the gas measuring instrument 2 is used to detect the gas in the coal sample tank 1, the cannula 11 can be first inserted into the annular groove 211 inside the air pipe 21, so that the inner cavity wall of the cannula 11 is flush with the inner cavity wall of the air pipe 21, and then the cannula 11 is pressed against the end face of the second sealing gasket 212 on the inner wall of the air pipe 21, and the second sealing gasket 212 is used to seal the gap between the cannula 11 and the air pipe 21 to prevent gas from leaking from the gap between the cannula 11 and the air pipe 21, and then the limiting cylinder 13 is twisted to allow the limiting cylinder 13 to be installed on the outer wall of the air pipe 21 through the matching threads of the first thread groove 131 and the thread ring 213, and at the same time, the limiting cylinder 13 is allowed to slide upward on the outer wall of the cannula 11 through the through hole 132 to press the annular limiting plate 12 against the end face of the air pipe 21 The first sealing gasket 121 seals the gap between the trachea 21 and the annular limiting plate 12 to prevent gas from leaking from the gap between the trachea 21 and the annular limiting plate 12. Finally, the limiting ring 22 is screwed to allow the limiting ring 22 to tighten the limiting cylinder 13 on the outer wall of the trachea 21 through the cooperation of the second thread groove 221 and the thread ring 213 to prevent the limiting cylinder 13 from loosening, thereby completing the connection and fixation of the trachea 21 and the cannula 11. The limiting cylinder 13 can be installed on the outer walls of the trachea 21 and the cannula 11 to connect and fix them, preventing the cannula 11 from loosening or falling off in the trachea 21, avoiding gas leakage caused by the cannula 11 loosening or falling off in the trachea 21, improving the stability of the connection between the trachea 21 and the cannula 11, and ensuring the accuracy of the gas measurement results.

[0028] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A gas content measuring device, comprising: A coal sample tank (1) and a gas detector (2), wherein the tank cover of the coal sample tank (1) is provided with a cannula (11) connected to the inner cavity of the coal sample tank (1), and the detection end of the gas detector (2) is provided with a gas pipe (21) for conveying the gas to be detected, characterized in that an annular groove (211) is provided inside the gas pipe (21), and a second sealing gasket (212) is provided on the inner wall of the annular groove (211), the end of the cannula (11) away from the coal sample tank (1) is inserted into the inside of the annular groove (211) and pressed against the end face of the second sealing gasket (212), and the outer wall of the cannula (11) is provided with an annular limiter for limiting its position The annular limiting plate (12) is provided with a first sealing gasket (121) on the end surface of the annular limiting plate (12); the trachea (21) is sleeved on the outside of the insert tube (11) and pressed tightly against the end surface of the first sealing gasket (121); and a threaded ring (213) is provided on the outer wall of the trachea (21); the outer wall of the insert tube (11) is located below the annular limiting plate (12) and is sleeved with a limiting cylinder (13); the limiting cylinder (13) surrounds the outside of the annular limiting plate (12) and is threadedly mounted on the outer wall of the trachea (21); and a limiting ring (22) is threadedly mounted on the outer wall of the trachea (21); and the limiting ring (22) is tightly attached to the end surface of the limiting cylinder (13).

2. A gas content measuring device according to claim 1, characterized in that: The inner cavity wall of the trachea (21) is flush with the inner cavity wall of the cannula (11).

3. A gas content measuring device according to claim 1, characterized in that: The second sealing gasket (212) and the first sealing gasket (121) are both made of rubber.

4. A gas content measuring device according to claim 1, characterized in that: The diameter of the annular limiting plate (12) is the same as the diameter of the air pipe (21), and the outer wall of the annular limiting plate (12) is flush with the outer wall of the air pipe (21).

5. A gas content measuring device according to claim 1, characterized in that: The bottom of the limiting cylinder (13) is provided with a through hole (132) communicating with its inner cavity. The limiting cylinder (13) is sleeved on the outer wall of the insertion tube (11) through the through hole (132) and slides on the outer wall. The opening area of ​​the through hole (132) is smaller than the end surface area of ​​the annular limiting plate (12).

6. A gas content measuring device according to claim 1, characterized in that: The inner cavity of the limiting cylinder (13) is provided with a first thread groove (131) matching with the thread ring (213), and the limiting cylinder (13) is installed on the outer wall of the air pipe (21) through the matching threads of the first thread groove (131) and the thread ring (213).

7. A gas content measuring device according to claim 6, characterized in that: The interior of the limiting ring (22) is provided with a second thread groove (221) that cooperates with the thread ring (213); the limiting ring (22) is installed on the outer wall of the air pipe (21) through the cooperation between the second thread groove (221) and the thread ring (213); and the internal thread of the second thread groove (221) is opposite to the internal thread of the first thread groove (131).

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