Double inert gas mixer

Abstract

The utility model discloses a double inert gas mixer, which relates to the technical field of mine fire prevention and extinguishment and comprises a shell, a lining pipe is arranged in the shell, a medium input pipe I communicated with the inside of the lining pipe is mounted on the outer wall of the shell along the tangential direction, and the medium input pipe I is used for conveying gas into the lining pipe. According to the double-inert-gas mixing device, when gas is input into the lining pipe through the medium input pipe I, the mixing impeller rotates due to the gas pressure difference, the turbulence degree of the gas can be greatly enhanced through the rotating motion, meanwhile, the gas input by the medium input pipe II is dispersed all around after flowing through the conical cover, and therefore the turbulence degree of the gas is greatly improved. And when the dispersed gas is conveyed rightwards, the dispersed gas is mixed with the gas input by the medium input pipe I, so that the two gases are mutually fused in different flowing paths, the mixing effect is greatly improved, and the mixing efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of mine fire prevention and extinguishing technology, specifically a dual inert gas mixer. Background Technology

[0002] Spontaneous combustion of coal seams is a major threat to coal mine safety. According to coal mine safety regulations, when mining coal seams that are prone to spontaneous combustion, comprehensive fire prevention measures such as injecting inert gas, injecting mud, injecting inhibitors, spraying grout to plug leaks, and equalizing pressure should be adopted. Among these measures, injecting inert gas, namely nitrogen and carbon dioxide, is widely used in underground fire prevention and extinguishing areas because of its good diffusion properties and ability to effectively reduce the oxygen concentration in the goaf.

[0003] Existing gas mixers achieve mixing by injecting gaseous carbon dioxide and nitrogen into a mixing tank together. However, due to the differences in concentration and activity between carbon dioxide and nitrogen, it takes a long time for them to mix fully in the mixing tank, resulting in low overall mixing efficiency. Therefore, this invention provides a dual inert gas mixer. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a dual inert gas mixer capable of efficiently mixing carbon dioxide and nitrogen, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a dual inert gas mixer, including a shell, an inner liner tube inside the shell, a medium input pipe I connected to the inside of the inner liner tube installed tangentially on the outer wall of the shell, the medium input pipe I being used to deliver one gas into the inner liner tube, a medium input pipe II being installed at the left end of the shell for delivering another gas into the inner liner tube, and a mixing component being provided inside the inner liner tube;

[0006] The mixing assembly includes a tripod mounted on the inner wall of the inner liner tube. A mixing impeller is rotatably mounted on the right side of the tripod. The mixing impeller can rotate due to pressure difference after receiving gas from the medium input pipe I. A connecting rod is fixedly connected to the left side of the tripod. A conical cover is mounted on the outer surface of the connecting rod. The conical cover can disperse the gas input from the medium input pipe II to the surrounding area, and the dispersed gas can mix with the gas input from the medium input pipe I when it is transported to the right.

[0007] Preferably, a medium output pipe communicating with the inside of the inner liner tube is installed at the right end of the housing, and a sewage discharge pipe communicating with the inside of the inner liner tube is installed at the bottom of the housing.

[0008] Preferably, two supports are installed at the bottom of the housing, one of which has a ground plate on its outer surface, and a nameplate holder is installed on the outer surface of the housing.

[0009] Preferably, a pressure-transmitting pipe is installed on the top of the housing, both ends of which are connected to the interior of the inner liner pipe, and a differential pressure gauge is provided on the outer surface of the pressure-transmitting pipe.

[0010] Preferably, the inner liner tube is provided with SV-type corrugated packing located to the right of the mixing impeller, and the right end of the SV-type corrugated packing is equipped with multiple fixing plates that are fixedly connected to the inner wall of the inner liner tube.

[0011] Preferably, two guide strips are fixedly connected to the inner wall of the housing, and two guide grooves that cooperate with the guide strips are opened on the outer wall of the inner liner tube, so that the inner liner tube can slide close to the inner wall of the housing.

[0012] Beneficial effects

[0013] This invention provides a dual inert gas mixer. Compared with the prior art, it has the following advantages:

[0014] (1) In this dual inert gas mixer, when the gas is input into the inner liner through the medium input pipe I, the mixing impeller rotates due to the gas pressure difference. This rotational motion can greatly enhance the turbulence of the gas. At the same time, the gas input through the medium input pipe II flows through the conical shroud and disperses to the surroundings. When the dispersed gas is transported to the right, it mixes with the gas input through the medium input pipe I, so that the two gases blend together under different flow paths, which greatly improves the mixing effect and improves the mixing efficiency.

[0015] (2) When the inner liner and its internal components are corroded or reach the set service life, the medium input pipe II or the medium output pipe of the dual inert gas mixer can be removed and the inner liner can be directly extracted from the shell, which is convenient for later maintenance or replacement. During the installation process, the cooperation of the guide strip and the guide groove can accurately limit the installation position of the inner liner inside the shell, and avoid the gas from being unable to flow due to misalignment between the inner liner and the hole on the shell. Attached Figure Description

[0016] Figure 1 This is a three-dimensional appearance schematic diagram of the present utility model;

[0017] Figure 2 This is a cross-sectional view of the shell of this utility model;

[0018] Figure 3 This is a three-dimensional view of the shell of this utility model;

[0019] Figure 4This is a three-dimensional schematic diagram of the inner lining tube of this utility model;

[0020] Figure 5 This is a three-dimensional appearance schematic diagram of the mixing component of this utility model.

[0021] In the diagram: 1. Shell; 11. Guide bar; 12. Medium input pipe I; 13. Medium input pipe II; 14. Medium output pipe; 15. Drain pipe; 16. Support; 17. Grounding plate; 18. Nameplate holder; 2. Inner liner pipe; 21. Guide groove; 3. Mixing assembly; 31. Tripod; 32. Connecting rod; 33. Mixing impeller; 34. Conical cover; 4. SV type corrugated packing; 41. Fixing plate; 5. Pressure transmission pipe; 51. Differential pressure gauge. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] This utility model provides two technical solutions:

[0024] Figures 1-5 The first embodiment is shown: a dual inert gas mixer, including a housing 1, an inner liner tube 2 inside the housing 1, a medium input pipe I 12 connected to the inside of the inner liner tube 2 installed tangentially on the outer wall of the housing 1, the medium input pipe I 12 is used to deliver a gas into the inner liner tube 2, a medium input pipe II 13 for delivering another gas into the inner liner tube 2 is installed at the left end of the housing 1, and a mixing component 3 is provided inside the inner liner tube 2;

[0025] The mixing assembly 3 includes a tripod 31 mounted on the inner wall of the inner liner pipe 2. A mixing impeller 33 is rotatably mounted on the right side of the tripod 31. The mixing impeller 33 can rotate due to the pressure difference after receiving the gas input from the medium input pipe I 12. A connecting rod 32 is fixedly connected to the left side of the tripod 31. A conical shroud 34 is mounted on the outer surface of the connecting rod 32. The conical shroud 34 can disperse the gas input from the medium input pipe II 13 to the surrounding area. When the dispersed gas is transported to the right, it can mix with the gas input from the medium input pipe I 12. When the gas is input into the inner liner pipe 2 through the medium input pipe I 12, the gas pressure difference causes the mixing impeller 33 to rotate. This rotational motion greatly enhances the turbulence of the gas. At the same time, the gas input through the medium input pipe II 13 flows through the conical shroud 34 and disperses to the surroundings. When the dispersed gas is transported to the right, it mixes with the gas input through the medium input pipe I 12, allowing the two gases to blend together under different flow paths, which greatly improves the mixing effect and mixing efficiency.

[0026] A medium output pipe 14 connected to the inside of the inner liner tube 2 is installed at the right end of the shell 1. A drain pipe 15 connected to the inside of the inner liner tube 2 is installed at the bottom of the shell 1. Impurities or condensates generated during the mixing process can be discharged in time through the drain pipe 15 to ensure the cleanliness of the mixer and maintain the quality of the mixed gas.

[0027] Two supports 16 are installed at the bottom of the housing 1. One of the supports 16 has a grounding plate 17 on its outer surface. A nameplate holder 18 is installed on the outer surface of the housing 1. By attaching a label to the nameplate holder 18, it is easy to mark the equipment model, parameters and other information, which is convenient for users to identify and manage. The grounding plate 17 can effectively prevent static electricity accumulation and improve the safety of equipment operation.

[0028] A pressure transmission pipe 5 is installed on the top of the shell 1. Both ends of the pressure transmission pipe 5 are connected to the inside of the inner liner pipe 2. A differential pressure gauge 51 is provided on the outer surface of the pressure transmission pipe 5. The pressure difference inside the inner liner pipe (2) can be monitored in real time through the differential pressure gauge (51), which is convenient for understanding the gas flow and judging whether the mixing process is normal.

[0029] Figures 1-5 The second embodiment is shown. The main difference from the first embodiment is that an SV-type corrugated packing 4 is provided inside the inner liner tube 2 to the right of the mixing impeller 33. Multiple fixing plates 41 are installed at the right end of the SV-type corrugated packing 4 and are fixedly connected to the inner wall of the inner liner tube 2. The corrugated packing on the SV-type corrugated packing 4 increases the contact area between gases and further improves the gas mixing effect. At the same time, the corrugated structure can guide the gas to flow in a specific direction, reduce the flow dead zone, and improve the fluid flow efficiency. In addition, the SV-type corrugated packing 4 is made of high-quality 304 stainless steel, which has good corrosion resistance and high temperature resistance, and is suitable for various harsh working environments.

[0030] Two guide strips 11 are fixedly connected to the inner wall of the housing 1. Two guide grooves 21 that cooperate with the guide strips 11 are opened on the outer wall of the inner liner tube 2. The inner liner tube 2 can slide tightly against the inner wall of the housing 1. When the inner liner tube 2 and its internal components are corroded or reach the set service life, the medium input pipe II 13 or the medium output pipe 14 can be removed and the inner liner tube 2 can be directly pulled out from the inside of the housing 1 for easy maintenance or replacement. During the installation of the inner liner tube 2, the cooperation of the guide strips 11 and the guide grooves 21 can accurately limit the installation position of the inner liner tube 2 inside the housing 1, and prevent the gas from being blocked due to misalignment between the inner liner tube 2 and the holes on the housing 1.

[0031] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0032] During operation, gaseous carbon dioxide and nitrogen enter the inner liner tube 2 through medium input pipe I 12 and medium input pipe II 13, respectively. The gas entering the inner liner tube 2 flows through the mixing component 3 and SV type corrugated packing 4 for mixing. The mixed dual inert gas flows out through medium output pipe 14.

[0033] When the gas is input into the inner liner pipe 2 through the medium input pipe I 12, the mixing impeller 33 rotates due to the gas pressure difference. This rotational motion greatly enhances the turbulence of the gas. At the same time, the gas input through the medium input pipe II 13 disperses in all directions after passing through the conical shroud 34. When the dispersed gas is transported to the right, it mixes with the gas input through the medium input pipe I 12, causing the two gases to blend together under different flow paths, which greatly improves the mixing effect and mixing efficiency.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. Dual inert gas mixer comprising a housing (1), characterized in that: The shell (1) is provided with an inner liner tube (2) inside. A medium input pipe I (12) communicating with the inside of the inner liner tube (2) is installed on the outer wall of the shell (1) along the tangential direction. The medium input pipe I (12) is used to deliver a gas into the inner liner tube (2). A medium input pipe II (13) for delivering another gas into the inner liner tube (2) is installed at the left end of the shell (1). A mixing component (3) is provided inside the inner liner tube (2). The mixing assembly (3) includes a tripod (31) mounted on the inner wall of the inner liner pipe (2). A mixing impeller (33) is rotatably mounted on the right side of the tripod (31). The mixing impeller (33) can rotate due to pressure difference after receiving gas from the medium input pipe I (12). A connecting rod (32) is fixedly connected to the left side of the tripod (31). A conical cover (34) is mounted on the outer surface of the connecting rod (32). The conical cover (34) can disperse the gas input from the medium input pipe II (13) to the surrounding area. When the dispersed gas is transported to the right, it can mix with the gas input from the medium input pipe I (12).

2. The dual inert gas blender of claim 1, wherein: The right end of the housing (1) is equipped with a medium output pipe (14) that communicates with the inside of the inner liner (2), and the bottom of the housing (1) is equipped with a sewage pipe (15) that communicates with the inside of the inner liner (2).

3. The dual inert gas mixer according to claim 1, characterized in that: Two supports (16) are installed at the bottom of the housing (1), one of which has a ground plate (17) on its outer surface, and a nameplate holder (18) is installed on the outer surface of the housing (1).

4. The dual inert gas blender of claim 1, wherein: The top of the housing (1) is equipped with a pressure transmission pipe (5), both ends of which are connected to the inside of the inner liner pipe (2), and a differential pressure gauge (51) is provided on the outer surface of the pressure transmission pipe (5).

5. The dual inert gas blender of claim 1, wherein: The inner liner tube (2) is provided with SV type corrugated packing (4) located to the right of the mixing impeller (33). Multiple fixing plates (41) that are fixedly connected to the inner wall of the inner liner tube (2) are installed at the right end of the SV type corrugated packing (4).

6. The dual inert gas blender of claim 1, wherein: The inner wall of the housing (1) is fixedly connected with two guide strips (11), and the outer wall of the inner liner tube (2) is provided with two guide grooves (21) that cooperate with the guide strips (11). The inner liner tube (2) can slide close to the inner wall of the housing (1).

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