Uniform gas mixing device

Abstract

The utility model provides a gas uniform mixing device which comprises a shell internally provided with a mixing cavity, one end of the shell is provided with a gas inlet, the other end of the shell is provided with a gas outlet, and the gas uniform mixing device is characterized in that the middle of the mixing cavity is large in inner diameter, the inner diameters of the two ends of the mixing cavity are gradually reduced towards the gas inlet and the gas outlet, a gas primary mixing assembly is arranged at the gas inlet, and a filtering assembly is arranged at the gas outlet. And a pressure monitoring port and a sampling port which are communicated with the mixing cavity are respectively formed in the shell. Different gases are primarily mixed through the gas primary mixing assembly and then enter the mixing cavity for final mixing, the inner diameter of the end, connected with the gas inlet, of the mixing cavity is gradually increased, so that the gases can be fully mixed under the action of the diffusion principle, and when the gases are mixed to reach the required concentration, the gases can be taken out through the sampling port for subsequent use; and when the gas mixture does not reach the required concentration, the gas is filtered by the filter assembly and then is emptied.

Description

Technical Field

[0001] The utility model relates to a mixing device, in particular to a gas uniform mixing device, belonging to the technical field of special gas detection. Background Art

[0002] In recent years, with the rapid development and technological update of chemical reconnaissance and early warning technology, the technical index requirements for special gas alarms have become increasingly high. It is often required that the alarm can achieve alarm even in the presence of special gases, even at low concentrations. At present, there are few types of gas mixing devices on the market for uniform mixing and stable output. Most of them have problems such as poor mixing uniformity, low safety, and inconvenient operation, and they cannot output special gases with the required concentration, especially low concentrations, which brings inconvenience to the sensitivity detection of special gas alarms. Therefore, it is necessary to improve the existing technology. Summary of the Invention

[0003] To solve the problems of poor mixing uniformity, low safety, inconvenient operation, and difficult concentration control existing in the existing special gas mixing devices, the utility model provides a gas uniform mixing device.

[0004] The utility model is completed through the following technical solutions: A gas uniform mixing device includes a housing with a mixing chamber inside. One end of the housing is provided with an air inlet, and the other end is provided with an air outlet. The middle part of the mixing chamber has a large inner diameter, and the inner diameters at both ends gradually decrease towards the air inlet and the air outlet. A gas preliminary mixing component is provided at the air inlet, and a filtering component is provided at the air outlet. The housing is respectively provided with a pressure monitoring port and a sampling port communicating with the mixing chamber, so that different gases can be preliminarily mixed through the gas preliminary mixing component first, and then enter the mixing chamber for final mixing. Since the inner diameter of one end of the mixing chamber connected to the air inlet gradually increases, the gas can be fully mixed under the diffusion action. When the gas mixture reaches the required concentration, the mixed gas can be taken out through the sampling port for the sensitivity detection of the special gas alarm. When the gas mixture does not reach the required concentration, or when the mixed gas is not used, it is filtered through the filtering component and then discharged.

[0005] The housing is set as a cylindrical bottle body. The air inlet is arranged at the front end of the cylindrical bottle body, the air outlet is arranged at the rear end of the cylindrical bottle body, the pressure monitoring port is arranged on the side wall of one side of the cylindrical bottle body, and the sampling port is arranged on the side wall of the other side of the cylindrical bottle body, so as to ensure the safety during gas mixing through the cylindrical bottle body.

[0006] The initial gas mixing assembly includes a housing, a mixing pipe axially arranged inside the housing. The inner end of the mixing pipe communicates with the air inlet at the front end of the housing, and the outer end of the mixing pipe is connected to a first quick connector arranged at the outer end of the housing. A second quick connector is arranged on the side of the housing, and a connector maintaining a gap with the air inlet of the housing is arranged at the inner end of the housing. Through this gap, the air inlet of the housing communicates with the second quick connector, so as to send special gas into the air inlet through the mixing pipe, and then send air into the air inlet through the second quick connector, so that the two gases are preliminarily mixed in the air inlet and then enter the mixing cavity of the housing for further full mixing.

[0007] The filtering assembly includes a filtering tank with filter media arranged inside. The input end of the filtering tank is connected to the exhaust port of the housing, and the output end is an open end, so as to filter the gas that does not meet the concentration requirements through the filtering tank, so that the gas meets the emission requirements.

[0008] The pressure monitoring port is connected to an external pressure monitoring device to monitor the internal pressure of the housing.

[0009] The utility model has the following advantages and effects:

[0010] 1. It has high safety and operability, especially high safety and operability when continuously outputting special gas with the required concentration for sampling;

[0011] 2. The concentration of the special gas is evenly mixed and stably output, which is convenient for effectively detecting the sensitivity of the alarm;

[0012] 3. The generated gas concentration is controllable within a certain concentration range and can be evenly mixed according to the required gas concentration requirements.

[0013] 4. The device of the utility model adopts a modular design, which is convenient for installation, disassembly, inspection and maintenance.

[0014] 5. The device of the utility model has good sealing performance. Description of the Drawings

[0015] Figure 1 is the front view of the utility model;

[0016] Figure 2 is the top sectional view of the utility model. Detailed Embodiment

[0017] Next, the technical solutions in the embodiments of the utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the protection scope of the utility model. Embodiment

[0018] The gas uniform mixing device provided by the utility model includes a housing 2 with a mixing chamber 8 therein. One end of the housing 2 is provided with an air inlet 7, and the other end is provided with an exhaust port 10. The middle part of the mixing chamber 8 has a large inner diameter, and the inner diameters at both ends gradually decrease towards the air inlet 7 and the exhaust port 10. A gas preliminary mixing assembly 1 is provided at the air inlet 7, and a filtering assembly 4 is provided at the exhaust port 10. The housing 2 is respectively provided with a pressure monitoring port 9 and a sampling port 3 communicating with the mixing chamber 8. By initially mixing different gases in the gas preliminary mixing assembly 1 and then entering the mixing chamber 8 for final mixing, since the inner diameter of one end of the mixing chamber 8 connected to the air inlet 7 gradually increases, the gas can be fully mixed under the diffusion action. When the gas mixture reaches the required concentration, the mixed gas can be taken out through the sampling port 4 for the sensitivity detection of the special gas alarm. When the gas mixture does not reach the required concentration or the mixed gas is not used, it is filtered by the filtering assembly 4 and then discharged.

[0019] The housing 2 is set as a cylindrical bottle body. The air inlet 7 is arranged at the front end of the cylindrical bottle body, the exhaust port 10 is arranged at the rear end of the cylindrical bottle body, the pressure monitoring port 9 is arranged on the side wall of one side of the cylindrical bottle body, and the sampling port 3 is arranged on the side wall of the other side of the cylindrical bottle body to ensure the safety during gas mixing through the cylindrical bottle body.

[0020] The gas preliminary mixing assembly 1 includes a housing 5, a mixing pipe 13 axially arranged in the housing 5. The inner end of the mixing pipe 13 is communicated with the air inlet 7 at the front end of the housing 2, the outer end of the mixing pipe 13 is connected to a first quick connector 12 arranged at the outer end of the housing 5. A second quick connector 6 is arranged on the side of the housing 5, and a connector 14 with a gap from the air inlet 7 of the housing 2 is arranged at the inner end of the housing 5. Through this gap, the air inlet 7 of the body 2 is communicated with the second quick connector 6. By sending special gas into the air inlet 7 through the mixing pipe 13 and then sending air into the air inlet 7 through the second quick connector 6, the two gases are initially mixed in the air inlet 7 and then enter the mixing chamber 8 in the housing 2 for further full mixing.

[0021] The filtering assembly 4 includes a filtering tank with a filter material 11 therein. The input end of the filtering tank is connected to the exhaust port 10 of the housing 2, and the output end is an open end, so as to filter the gas that does not meet the concentration requirements or the mixed gas that is no longer used through the filtering tank, so that the gas meets the emission requirements.

[0022] The pressure monitoring port 9 is connected to an external pressure monitoring device to monitor the internal pressure of the housing 2.

[0023] In the description of this specification, the descriptions referring to terms such as "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0024] The preferred embodiments of the present utility model disclosed above are only used to help explain the present utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the present utility model to the specific embodiments described. Obviously, according to the content of this specification, many modifications and changes can be made. This specification selects and specifically describes these embodiments in order to better explain the principle and practical application of the present utility model, so that those skilled in the art can well understand and utilize the present utility model. The present utility model is only limited by the claims and their full scope and equivalents.

Claims

1. A gas uniform mixing device, comprising a housing with a mixing chamber therein, an air inlet at one end of the housing and an exhaust port at the other end, characterized in that The middle part of the mixing chamber has a large inner diameter, and the inner diameters at both ends gradually decrease toward the air inlet and the exhaust port. A gas primary mixing component is provided at the air inlet, a filter component is provided at the exhaust port, and a pressure monitoring port and a sampling port connected to the mixing chamber are provided on the shell.

2. The gas uniform mixing device according to claim 1, characterized in that The shell is set as a cylindrical bottle body, the air inlet is set at the front end of the cylindrical bottle body, the exhaust port is set at the rear end of the cylindrical bottle body, the pressure monitoring port is set on the side wall of one side of the cylindrical bottle body, and the sampling port is set on the side wall of the other side of the cylindrical bottle body.

3. The gas uniform mixing device according to claim 1, characterized in that The gas primary mixing assembly includes a shell, a mixing tube axially arranged in the shell, the inner end of the mixing tube is connected to the air inlet at the front end of the shell, the outer end of the mixing tube is connected to a first quick connector arranged at the outer end of the shell, a second quick connector is arranged on the side of the shell, and a connector is arranged at the inner end of the shell to maintain a gap with the shell air inlet, and the body air inlet is connected to the second quick connector through the gap.

4. The gas uniform mixing device according to claim 1, characterized in that The filter assembly comprises a filter tank with filter material arranged therein, the input end of the filter tank is connected to the exhaust port of the shell, and the output end is set to be open.

5. The gas uniform mixing device according to claim 1, characterized in that The pressure monitoring port is connected to an external pressure monitoring device.

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