Outer cover and gas detection device using same

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By leaving a pass-air gap between the gas calibration cover and the gas detector, the problem of insufficient contact of gas in the prior art is solved, and the accuracy and stability of gas detection results are achieved.

CN222529322UActive Publication Date: 2025-02-25SHENZHEN HANWEI INTERNET OF THINGS CO LTD

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Patent Information

Application Number: CN202420985340.3
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2024-05-09
Publication Date: 2025-02-25
Estimated Expiration: 2034-05-09

AI Technical Summary

Technical Problem

The existing gas calibration hood is not designed with a blank structure, which causes the calibrator to fit too tightly and the gas does not fully contact the gas detector, affecting the accuracy of the calibration results.

Method used

There is a pass-air gap between the cover and the gas detector, so that the input gas can fully contact the surface of the gas detector in the pass-air gap, thereby reaching the sensor.

Benefits of technology

By leaving a pass-through gap, the accuracy and stability of the gas detection results are ensured, and the inaccurate detection results are avoided due to insufficient contact of the gas.

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Abstract

The utility model relates to the technical field of gas detection, in particular to an outer cover and a gas detection device applying the outer cover, the outer cover comprises a cover body, a side wall is formed on the periphery of the cover body, a cavity is formed by the side wall in a surrounding mode, the cover body is provided with a gas inlet structure and a gas outlet structure which are communicated with the cavity, and the cover body is further provided with a groove corresponding to the cavity. The opposite side of the connecting piece installed in the groove is connected to the cover body, the opposite side of the connecting piece installed in the groove is connected to the gas detector, and the depth of the groove is smaller than the thickness of the connecting piece so that a gas passing gap can be reserved between the cover body and the gas detector. Through the arrangement, the input gas can be in full contact with the surface of the gas detector in the gas passing gap, so that the input gas reaches the sensor, and the accuracy and the stability of a gas detection result are ensured.

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Description

Technical Field

[0001] The utility model relates to the technical field of gas detection, in particular to an outer cover and a gas detection device using the outer cover. Background Art

[0002] A gas calibration hood is a component used to fix gas detection instruments, and is usually used to detect and calibrate the accuracy and reliability of gas sensors. Gas calibration hoods are also often used in the fields of industrial safety and environmental protection to ensure that the gas concentration in factories and environments meets relevant regulations and standards. In the industrial field, gas calibration hoods are also widely used in various types of factories, such as petrochemicals, pharmaceuticals, food processing, and metal processing. Various equipment used in these factories, such as furnaces, pipes, containers, and pumps, may release toxic and harmful gases, so gas sensors and gas calibration hoods are needed to detect and monitor the concentration of these gases. In addition, in the field of environmental protection, gas calibration hoods are also widely used in various environmental monitoring stations and laboratories. These places need to use gas sensors and calibration hoods to detect various harmful gases in the air, such as carbon monoxide, carbon dioxide, nitrogen oxides, hydrogen sulfide, etc., to ensure environmental quality and human health.

[0003] The calibration cover has the following functions: preventing gas diffusion, making the gas flow evenly through the sensor surface, improving the accuracy of detection; shortening the alarm response time, saving gas flow, and protecting the health of the calibration personnel. However, the existing calibration cover is not designed with a space structure, resulting in the calibration cover and the gas detector being too tightly fitted, causing the gas to flow out of the gas outlet without fully contacting the gas detector, greatly affecting the accuracy of the calibration result. Utility Model Content

[0004] In order to solve at least one technical problem existing in the above-mentioned prior art, the utility model provides an outer cover and a gas detection device using the same, by leaving an air gap between the cover body and the gas detector, so that the input gas can fully contact the surface of the gas detector in the air gap, thereby reaching the sensor, thereby ensuring the accuracy and stability of the gas detection results.

[0005] The technical solution adopted by the utility model to solve the problem is:

[0006] Housing, including:

[0007] The cover body has side walls formed around the cover body, and a cavity is formed around the side walls. The cover body is provided with an air inlet structure and an air outlet structure connected to the cavity. The cover body is also provided with a groove corresponding to the cavity. The opposite side of the connector installed in the groove is connected to the cover body, and the other side is connected to the gas detector. The depth of the groove is less than the thickness of the connector, so that an air gap is left between the cover body and the gas detector.

[0008] In some embodiments of the present invention, the air inlet structure is disposed corresponding to one opposite corner of the cover body, and the air outlet structure is disposed corresponding to another opposite corner of the cover body.

[0009] In some more specific embodiments, the groove is arranged between the air inlet structure and the air outlet structure, so that the connecting member installed in the groove separates the air inlet structure and the air outlet structure.

[0010] In some further examples, the projection surface of the cover is arranged in a square shape, and the groove is arranged along the diagonal line of the projection surface of the cover.

[0011] In some embodiments of the utility model, the air intake structure includes an air intake duct, and a mounting platform is formed at one end of the cover body facing away from the cavity, and the air intake duct is arranged to penetrate through the mounting platform.

[0012] In some more specific embodiments, the air intake duct is configured in a cylindrical shape.

[0013] In some further examples, threads are formed on the inner wall of the intake duct.

[0014] In some embodiments of the present invention, the air outlet structure includes a plurality of air outlet holes.

[0015] In some embodiments of the present invention, side walls are formed on all four sides of the cover body, and each side wall surrounds and forms a cavity.

[0016] Based on the same concept, the utility model also provides a gas detector, which is applied with the outer cover as described above.

[0017] In summary, compared with the prior art, the outer cover provided by the utility model and the gas detection device using the same have the following technical effects:

[0018] A groove is provided on the cover body corresponding to the cavity, so that the opposite side of the connector installed in the groove is connected to the cover body and the other side is connected to the gas detector. The depth of the groove is less than the thickness of the connector, so that an air gap is left between the cover body and the gas detector, so that the input gas can fully contact the surface of the gas detector in the air gap and reach the sensor, thereby ensuring the accuracy and stability of the gas detection results. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a first schematic diagram of an embodiment of an outer cover of the utility model;

[0020] Figure 2 A second schematic diagram of an outer cover embodiment of the utility model;

[0021] Figure 3 A schematic diagram of a gas detection device embodiment of the utility model;

[0022] Figure 4 This is a disassembled diagram of an embodiment of a gas detection device of the present utility model.

[0023] The meanings of the reference numerals are as follows:

[0024] 1. Cover body; 10. Groove; 11. Air inlet duct; 12. Air outlet; 13. Mounting platform; 14. Recessed joint; 2. Connector; 3. Gas detector; 30. Surface air hole; 31. Output end. DETAILED DESCRIPTION

[0025] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] It should be understood that the references to "one embodiment" or "an embodiment" throughout the specification mean that the specific features, structures, or characteristics associated with the embodiment are included in at least one embodiment of the present invention. Therefore, the references to "in one embodiment" or "in an embodiment" appearing throughout the specification do not necessarily refer to the same embodiment. In addition, these specific features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0027] It should be noted that the directions or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs. The terms used in the description of the present invention are only for describing specific embodiments and are not intended to limit the present invention. Example

[0029] according to Figure 1 and Figure 2 As shown, the utility model provides an embodiment of an outer cover, comprising: a cover body 1.

[0030] Specifically, a side wall is formed on the surrounding side of the cover body 1, and the side wall is surrounded to form a cavity. The cover body 1 is provided with an air inlet structure and an air outlet structure connected to the cavity. The cover body 1 is also provided with a groove 10 corresponding to the cavity. The opposite side of the connecting piece 2 installed in the groove 10 is connected to the cover body 1, and the other side is connected to the gas detector 3. The depth of the groove 10 is less than the thickness of the connecting piece 2, so that there is an air gap between the cover body 1 and the gas detector 3; in addition, the width of the air gap can be set to 1.5 mm.

[0031] Through the above arrangement, the input gas can fully contact the surface of the gas detector 3 in the gas gap, thereby reaching the sensor, thereby ensuring the accuracy and stability of the gas detection results.

[0032] Specifically, the air inlet structure is arranged at an opposite side corner of the cover body 1, and the air outlet structure is arranged at an opposite other side corner of the cover body 1, so as to increase the interval between the air inlet structure and the air outlet structure, reduce the crosstalk between the airflows, and improve the stability of the detection process and the accuracy of the detection results; more specifically, the groove 10 is arranged between the air inlet structure and the air outlet structure, so that the connector 2 installed on the groove 10 separates the air inlet structure and the air outlet structure, thereby further cutting off the gas cross-flow between the air inlet structure and the air outlet structure, and ensuring the stability and accuracy of the detection; in practice, the projection surface of the cover body 1 is arranged in a square shape, and the groove 10 is arranged along the diagonal line of the projection surface of the cover body 1, so as to isolate the airflow connection between the air inlet structure and the air outlet structure to the greatest extent.

[0033] Furthermore, the air intake structure includes an air intake pipe 11, and a mounting platform 13 is formed at one end of the cover body 1 facing away from the cavity, and the air intake pipe 11 is penetrated and arranged on the mounting platform 13, so that the trachea joint corresponds to the mounting platform 13 and is connected to the air intake pipe 11; further, the air intake pipe 11 is arranged in a cylindrical shape, which serves to facilitate the loading and unloading of the trachea joint; in actual use, a thread is formed on the inner wall of the air intake pipe 11, so as to form a mating screw connection with the outer peripheral thread of one end of the trachea joint, and the other end of the trachea joint is connected to a gas hose, so that the gas is input into the cover body 1 through the gas hose and the air intake pipe 11; in addition, the mounting platform 13 can also be set to a cylinder, the diameter of the air intake channel can be set to 5mm, the diameter of the mounting platform 13 can be set to 8mm, and the thickness of the mounting platform 13 can be set to 6mm.

[0034] Preferably, the air outlet structure includes a plurality of air outlet holes 12, and the air outlet holes 12 can be optionally set to be multiple, so as to disperse the air pressure during air outlet and ensure the stable operation of the gas detector 3, and the diameter of the air outlet hole 12 can be set to 0.2 mm; more preferably, side walls are formed on all four sides of the cover body 1, and each side wall forms a cavity; optionally, one of the side walls is formed with a recessed position 14, and the recessed position 14 is used to cooperate with the output end 31 of the gas detector 3, and has the function of limiting the circumferential rotation of the cover body 1. Example

[0035] according to Figure 3 and Figure 4 As shown, the utility model provides an embodiment of a gas detection device, which is applied with the outer cover as mentioned above, and specifically includes: a cover body 1, a connecting piece 2, and a gas detector 3.

[0036] Among them, the connecting member 2 is installed in the groove 10, and the gas detector 3 is installed in the corresponding cavity of the cover body 1, so that the opposite side of the connecting member 2 is connected to the cover body 1, and the other side is connected to the gas detector 3. The connecting member 2 can be set to EVA (ethylene-vinyl acetate copolymer) cotton, and the thickness of the connecting member 2 can be set to 2mm so as to fit with the cover body 1 and the gas detector 3.

[0037] In practice, the gas detector 3 is provided with a plurality of surface pores 30 toward the cover body 1, so that the input gas can enter the interior of the gas detector 3 through the surface pores 30, thereby reaching the sensor in the gas detector 3, and then detecting the input gas, and discharging the gas from the interior of the gas detector 3 through the surface pores 30, so as to be discharged from the air outlet hole; accordingly, the gas detector 3 is provided with an output terminal 31, and the output terminal 31 is used to connect an external device to output the detection result.

[0038] The following is an explanation of the working process of the above-mentioned gas detection device embodiment: when the gas enters the air gap through the air intake structure, the gas will diffuse along the surface of the gas detector 3, and then enter the gas detector 3 through the surface pores 30 of the corresponding air intake structure and reach the sensor. The sensor detects the gas and obtains the detection result, and the output end 31 outputs the detection result to an external device for the detection personnel to view. After detection, the gas inside the gas detector 3 will be discharged from the surface pores 30 of the corresponding air outlet structure under the action of air pressure, and then discharged from the air outlet structure.

[0039] It should be noted that each embodiment in this specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referred to each other. Although optional embodiments of the utility model embodiments have been described, once those skilled in the art know the basic creative concept, they can make additional changes and modifications to these embodiments. Therefore, the attached claims are intended to be interpreted as including optional embodiments and all changes and modifications that fall within the scope of the utility model embodiments.

[0040] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity from another entity, and do not necessarily require or imply any such actual relationship or order between these entities. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that an article or terminal device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such article or terminal device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the article or terminal device including the elements.

[0041] The technical solution provided by the present invention is introduced in detail above. Specific examples are used in this article to illustrate the principle and implementation method of the present invention. At the same time, for those skilled in the art, according to the principle and implementation method of the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. An outer cover, characterized in that It is applied to a gas detection device, which comprises: A cover body (1), wherein a side wall is formed on the circumference of the cover body (1), wherein the side wall surrounds and forms a cavity, wherein the cover body (1) is provided with an air inlet structure and an air outlet structure connected to the cavity, wherein the cover body (1) is also provided with a groove (10) corresponding to the cavity, wherein the opposite side of a connector (2) installed in the groove (10) is connected to the cover body (1), and the opposite side is connected to a gas detector (3), wherein the depth of the groove (10) is less than the thickness of the connector (2), so that an air gap is left between the cover body (1) and the gas detector (3).

2. The cover according to claim 1, characterized in that The air inlet structure is arranged corresponding to an opposite side corner of the cover body (1), and the air outlet structure is arranged corresponding to another opposite side corner of the cover body (1).

3. The cover according to claim 2, characterized in that The groove (10) is arranged between the air inlet structure and the air outlet structure, so that the connecting member (2) installed in the groove (10) separates the air inlet structure and the air outlet structure.

4. The cover according to claim 3, characterized in that The projection surface of the cover body (1) is arranged in a square shape, and the groove (10) is arranged along the diagonal line of the projection surface of the cover body (1).

5. The outer cover according to any one of claims 1 to 4, characterized in that: The air intake structure comprises an air intake duct (11); an end of the cover body (1) facing away from the cavity is formed with a mounting platform (13); and the air intake duct (11) is arranged to penetrate the mounting platform (13).

6. The cover according to claim 5, characterized in that The air intake pipe (11) is arranged in a cylindrical shape.

7. The cover according to claim 6, characterized in that The inner wall of the air intake pipe (11) is formed with threads.

8. The outer cover according to any one of claims 1 to 4, characterized in that: The air outlet structure comprises a plurality of air outlet holes (12).

9. The outer cover according to any one of claims 1 to 4, characterized in that: The cover body (1) is formed with side walls on all four sides, and each of the side walls surrounds and forms the cavity.

10. A gas detection device, characterized in that: The invention relates to an outer cover as claimed in any one of claims 1 to 9.