Gas cylinder sampling device for respirator and detection system

Abstract

The utility model provides a respirator gas cylinder sampling device and a respirator gas cylinder detection system, the sampling device comprises a first joint and a second joint which are communicated with each other, the first joint is provided with a first gas inlet section and a first gas outlet section which are communicated with each other along the axial direction of the first joint; the second joint is axially provided with a second air inlet section and a second air outlet section which are communicated with each other; the first gas inlet section is detachably inserted into the second gas outlet section, and the first gas outlet section is configured to be communicated with a gas detector; the second air inlet section is configured to be used for being communicated with a mask connector on the respirator, and a clamping part used for being connected with the mask connector in a clamped mode is arranged in the second air inlet section. According to the utility model, the gas stored in the gas cylinder for the respirator can be quickly sampled, and the sampling operation is more convenient, safer and more reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of gas cylinder sampling equipment, in particular to a gas cylinder sampling device for a breathing apparatus and a gas cylinder detection system for a breathing apparatus. Background Art

[0002] A breathing apparatus is a device for specific groups such as firefighters, workers, and emergency responders. By using a breathing apparatus, people can be helped to breathe clean air in a harmful gas or oxygen-deficient environment. The breathing apparatus includes a gas cylinder, a pipeline, a mask, etc. High-pressure air is stored in the gas cylinder, so that users can breathe air at any time when needed without relying on an external air source.

[0003] Since the pressure in the gas cylinder is generally close to 10 MPa to 45 MPa, when sampling the gas stored in the gas cylinder, an external pressure reducing valve and a pressure gauge need to be connected. After the pressure is reduced to an appropriate pressure by the pressure reducing valve, it is then connected to the sampler. Therefore, there are problems such as more access devices, inconvenient operation, and the need to use professional tools and professional personnel for operation.

[0004] It should be noted that the information disclosed in the background art part of this utility model is only intended to deepen the understanding of the general background art of this utility model, and should not be regarded as an admission or any form of implication that this information constitutes the prior art known to those skilled in the art. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a gas cylinder sampling device for a breathing apparatus and a gas cylinder detection system for a breathing apparatus, which can realize the rapid sampling of the gas stored in the gas cylinder for the breathing apparatus, and the sampling operation is more convenient, safe and reliable.

[0006] To achieve the above purpose, the utility model provides a gas cylinder sampling device for a breathing apparatus, including a first joint and a second joint that are connected to each other. The first joint has a first intake section and a first outlet section that are connected to each other along its axial direction. The second joint has a second intake section and a second outlet section that are connected to each other along its axial direction. The first intake section is detachably inserted into the second outlet section. The first outlet section is configured to be connected to a gas detector. The second intake section is configured to be connected to the mask interface, and a clamping portion for clamping with the mask interface is provided inside the second intake section.

[0007] Optionally, the first intake section is threadedly connected to the second outlet section.

[0008] Optionally, a gas buffer section is further provided along the axial direction of the second joint between the second intake section and the second outlet section. The gas buffer section is connected to the second intake section and the second outlet section.

[0009] Optionally, the inner diameter of the gas buffer section is less than or equal to the inner diameter of the second intake section and greater than the inner diameter of the second outlet section.

[0010] Optionally, a tapered portion is provided at one end of the second intake section close to the gas buffer section, and the inner diameter of the tapered portion gradually decreases in a direction close to the gas buffer section.

[0011] Optionally, the clamping portion includes a pair of clamping members extending circumferentially along the inner circumference of the second intake section, and the two clamping members are symmetrically arranged with respect to the axis of the second joint.

[0012] Optionally, a pair of through holes corresponding to the two clamping members one by one are provided along the circumference of the second intake section.

[0013] Optionally, the inner diameter of the second intake section is greater than the inner diameter of the second outlet section, and the outer diameter of the second intake section is greater than the outer diameter of the second outlet section.

[0014] Optionally, the inner diameter of the first intake section is less than the inner diameter of the first outlet section.

[0015] To achieve the above object, the present utility model further provides a breathing apparatus gas cylinder detection system, the detection system includes a gas detector, a breathing apparatus and the breathing apparatus gas cylinder sampling device described in any one of the above.

[0016] Compared with the prior art, the breathing apparatus gas cylinder sampling device and the breathing apparatus gas cylinder detection system provided by the present utility model have the following beneficial effects:

[0017] The gas cylinder sampling device for a breathing apparatus provided by the present utility model includes a first joint and a second joint that are interconnected. The first joint has a first intake section and a first outlet section that are interconnected along its axial direction. The second joint has a second intake section and a second outlet section that are interconnected along its axial direction. The first intake section is detachably inserted into the second outlet section. The first outlet section is configured to be connected to a gas detector. The second intake section is configured to be connected to a mask interface on the breathing apparatus, and a clamping portion for clamping with the mask interface is provided inside the second intake section. Since the first joint of the gas cylinder sampling device for a breathing apparatus provided by the present utility model can be connected to a gas detector, and the second joint can be connected to the mask interface on the breathing apparatus, thus, when it is necessary to sample the gas in the gas cylinder of the breathing apparatus, only need to connect the first joint to the gas detector through an air pipe, and connect the second joint to the mask interface on the breathing apparatus. Thus, the high-pressure gas in the gas cylinder can reach the sampling device provided by the present utility model successively through a pressure reducer, a guide pipe and a gas supply valve after being decompressed, and finally be transported to the gas detector through the sampling device provided by the present utility model for detection, so that the sampling and detection of the gas in the gas cylinder of the breathing apparatus can be completed quickly. In summary, by adopting the gas cylinder sampling device for a breathing apparatus provided by the present utility model, it is no longer necessary to additionally configure a pressure reducer and a pressure gauge, which can not only reduce the sampling cost of the gas in the gas cylinder of the breathing apparatus, but also make the sampling operation more convenient, safe and reliable. In addition, since the first joint and the second joint in the sampling device provided by the present utility model are detachably connected, it is more convenient to assemble and disassemble the sampling device provided by the present utility model. Additionally, since a clamping portion for connecting to the mask interface on the breathing apparatus is provided inside the second intake section of the second joint in the sampling device provided by the present utility model, thus, through the clamping portion, a firm connection can be achieved between the second joint and the mask interface, ensuring that the high-pressure gas in the gas cylinder can reach the sampling device provided by the present utility model successively through a pressure reducer, a guide pipe and a gas supply valve after being decompressed.

[0018] Since the gas cylinder detection system for a breathing apparatus provided by the present utility model includes the gas cylinder sampling device for a breathing apparatus provided by the present utility model, the gas cylinder detection system for a breathing apparatus provided by the present utility model at least has all the beneficial effects of the gas cylinder sampling device for a breathing apparatus provided by the present utility model. For specific details, reference can be made to the relevant descriptions of the beneficial effects of the gas cylinder sampling device for a breathing apparatus provided by the present utility model in the above text, and no further elaboration will be made here. Description of the Drawings

[0019] Figure 1 It is a cross-sectional view of the gas cylinder sampling device for a breathing apparatus provided by an embodiment of the present utility model;

[0020] Figure 2It is a right view of the second joint in the gas cylinder sampling device for a breathing apparatus provided by an embodiment of the present utility model.

[0021] Among them, the reference numerals are as follows:

[0022] The first joint - 100; the first air inlet section - 110; the first air outlet section - 120;

[0023] The second joint - 200; the second air inlet section - 210; the tapered portion - 211; the through hole - 212; the second air outlet section - 220; the clamping portion - 230; the clamping member - 231; the gas buffer section - 240. Detailed implementation manners

[0024] The gas cylinder sampling device for a breathing apparatus and the gas cylinder detection system for a breathing apparatus proposed by the present utility model will be further described in detail below in conjunction with the drawings and specific implementation manners. According to the following description, the advantages and features of the present utility model will be clearer. It should be noted that the drawings are in a very simplified form and all use non-precise scales, only for the purpose of conveniently and clearly assisting in explaining the embodiments of the present utility model. In order to make the purpose, features, and advantages of the present utility model more obvious and understandable, please refer to the drawings. It should be noted that the structures, scales, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present utility model. Any modification of the structure, change of the proportional relationship, or adjustment of the size, in the case of being the same or similar to the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope that the technical content disclosed by the present utility model can cover. The specific design features of the present utility model disclosed herein, such as specific dimensions, directions, positions, and shapes, will be partially determined by the specific application and use environment. Also, in the following described embodiments, sometimes the same reference numerals are used commonly between different drawings to represent the same part or parts having the same functions, and the repeated description thereof is omitted. In this specification, similar reference numerals and letters are used to represent similar items. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings. Additionally, if the methods described herein include a series of steps, and the order of these steps presented herein is not necessarily the only order in which these steps can be executed, and some of the described steps can be omitted and / or some other steps not described herein can be added to the method.

[0025] It should be noted that, in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, they should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Also, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element. The singular forms "a", "an" and "the" include plural referents, the term "or" is generally used in the sense of "and / or", the term "several" is generally used in the sense of "at least one", the term "at least two" is generally used in the sense of "two or more", and the term "plural" is generally used in the sense of "at least two".

[0026] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is 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, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In the description of the present utility model, unless otherwise clearly specified and defined, the terms "installation", "connection", "connection", "fixation" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In addition, in the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features between them. Moreover, the first feature being "above", "above", and "on the top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below", and "under the bottom of" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0027] The core idea of the present utility model is to provide a gas sampling device for a breathing apparatus cylinder and a gas detection system for a breathing apparatus cylinder, which can achieve rapid sampling of the gas stored in the breathing apparatus cylinder, and the sampling operation is more convenient, safe and reliable.

[0028] To achieve the above idea, the present utility model provides a gas sampling device for a breathing apparatus cylinder, which is suitable for gas sampling of the cylinder in the following breathing apparatus. Specifically, the breathing apparatus includes a cylinder and a back frame. The cylinder is fixed on the back frame. A pressure reducer, a gas guide pipe and a gas supply valve are provided on the back frame. The pressure reducer is communicated with the cylinder. One end of the gas guide pipe is connected to the pressure reducer, and the other end of the gas guide pipe is connected to the gas supply valve. The gas supply valve has a mask interface for connecting with a breathing mask. It should be noted that, as can be understood by those skilled in the art, more structures of the breathing apparatus can refer to the relevant content in the field of breathing apparatus well-known to those skilled in the art, so it will not be elaborated here.

[0029] Please refer to Figure 1 , which is a cross-sectional view of the gas cylinder sampling device for a breathing apparatus provided by an embodiment of the present invention. As Figure 1 shown, the gas cylinder sampling device for a breathing apparatus provided by the present invention includes a first joint 100 and a second joint 200 that are interconnected. The first joint 100 has a first intake section 110 and a first outlet section 120 that are interconnected along its axial direction. The second joint 200 has a second intake section 210 and a second outlet section 220 that are interconnected along its axial direction. The first intake section 110 is detachably inserted into the second outlet section 220. The first outlet section 120 is configured to be connected to a gas detector. The second intake section 210 is configured to be connected to the mask interface. The inside of the second intake section 210 has a clamping portion 230 for clamping with the mask interface.

[0030] Since the first joint 100 of the gas cylinder sampling device for a breathing apparatus provided by the present invention can be connected to a gas detector, and the second joint 200 can be connected to the mask interface on the breathing apparatus. Thus, when it is necessary to sample the gas in the gas cylinder of the breathing apparatus, only need to connect the first joint 100 to the gas detector through a gas pipe, and connect the second joint 200 to the mask interface on the breathing apparatus. Thus, the high-pressure gas in the gas cylinder can reach the sampling device provided by the present invention successively through a pressure reducer, a gas pipe and a supply valve after being decompressed, and finally be transported to the gas detector through the sampling device provided by the present invention for detection, so that the sampling and detection of the gas in the gas cylinder of the breathing apparatus can be completed quickly. In summary, by using the gas cylinder sampling device provided by the present invention, it is no longer necessary to additionally configure a pressure reducer and a pressure gauge, which can not only reduce the sampling cost of the gas in the gas cylinder of the breathing apparatus, but also make the sampling operation more convenient, safe and reliable. In addition, since the first joint 100 and the second joint 200 in the sampling device provided by the present invention are detachably connected, it is more convenient to assemble and disassemble the sampling device provided by the present invention. Additionally, since the inside of the second intake section 210 of the second joint 200 in the sampling device provided by the present invention is provided with a clamping portion 230 for connecting to the mask interface on the breathing apparatus, thus, through the clamping portion 230, a firm connection can be made between the second joint 200 and the mask interface, so as to ensure that the high-pressure gas in the gas cylinder can reach the sampling device provided by the present invention successively through a pressure reducer, a gas pipe and a supply valve after being decompressed.

[0031] It should be noted that, as can be understood by those skilled in the art, the outer surface of the mask interface on the respirator is provided with a circumferentially arranged clamping groove, and the clamping portion 230 arranged inside the second air inlet section 210 can be adapted to the clamping groove, so as to realize the clamping between the second joint 200 and the mask interface. In addition, it should be noted that, as can be understood by those skilled in the art, after connecting the first joint 100 to the gas detector through a gas pipe and connecting the second joint 200 to the mask interface on the respirator, the supply valve needs to be opened first so that the high-pressure gas in the gas cylinder can reach the sampling device provided by the present invention successively after being decompressed by the pressure reducer, passing through the gas guide pipe and the supply valve.

[0032] In some exemplary embodiments, the materials of the first joint 100 and the second joint 200 are both stainless steel. Thus, by using the first joint 100 and the second joint 200 made of stainless steel, the corrosion resistance of the gas cylinder sampling device for respirators provided by the present invention can be effectively improved, and thus the service life of the gas cylinder sampling device for respirators provided by the present invention can be effectively extended.

[0033] In some exemplary embodiments, the first air inlet section 110 is threadedly connected to the second air outlet section 220. Thus, by arranging the first air inlet section 110 and the second air outlet section 220 to be threadedly connected, the assembly and disassembly of the gas cylinder sampling device for respirators provided by the present invention can be made more convenient. Specifically, the first air inlet section 110 has an external thread, and the second air outlet section 220 has an internal thread. Thus, by providing an external thread on the outer surface of the first air inlet section 110 and an internal thread on the inner surface of the second air outlet section 220, the threaded connection between the first joint 100 and the second joint 200 can be realized, and further the assembly and disassembly of the gas cylinder sampling device for respirators provided by the present invention can be made more convenient.

[0034] Please continue to refer to Figure 1 , as Figure 1 shown, in some exemplary embodiments, the second joint 200 further has a gas buffer section 240 located between the second air inlet section 210 and the second air outlet section 220 along its axial direction, and the gas buffer section 240 is communicated with the second air inlet section 210 and the second air outlet section 220. Thus, by providing a gas buffer section 240 communicated with the second air inlet section 210 and the second air outlet section 220 between the second air inlet section 210 and the second air outlet section 220 of the second joint 200, the sampling gas can be buffered by the gas buffer section 240, so that there is no need to additionally provide a component for buffering the sampling gas, and further not only the cost can be effectively reduced, but also the subsequent gas detection can be made more convenient.

[0035] Please continue to refer to Figure 1 , as Figure 1 shown, in some exemplary embodiments, the inner diameter of the gas buffer section 240 is less than or equal to the inner diameter of the second intake section 210 and greater than the inner diameter of the second outlet section 220. Thus, by setting the inner diameter of the gas buffer section 240 to be less than or equal to the inner diameter of the second intake section 210 and greater than the inner diameter of the second outlet section 220, it can be ensured that the gas buffer section 240 can smoothly function as a gas buffer.

[0036] Please continue to refer to Figure 1 , as Figure 1 shown, in some exemplary embodiments, one end of the second intake section 210 close to the gas buffer section 240 is provided with a tapered portion 211, and the inner diameter of the tapered portion 211 gradually decreases in the direction close to the gas buffer section 240. Thus, by providing the tapered portion 211 with an inner diameter gradually decreasing in the direction close to the gas buffer section 240 at one end of the second intake section 210 close to the gas buffer section 240, a smooth transition between the inner diameters of the second intake section 210 and the gas buffer section 240 can be achieved.

[0037] Please continue to refer to Figure 1 , as Figure 1 shown, in some exemplary embodiments, the clamping portion 230 includes a pair of clamping members 231 extending circumferentially along the inner circumference of the second intake section 210, and the two clamping members 231 are symmetrically arranged with respect to the axis of the second joint 200. Thus, by providing a pair of clamping members 231 extending circumferentially along the inner circumference of the second intake section 210 of the second joint 200 and symmetrically arranged with respect to the axis of the second joint 200 inside the second intake section 210 of the second joint 200, not only can the clamping between the second joint 200 and the mask interface be smoothly achieved so that the second joint 200 and the mask interface can be firmly connected, but also it can be ensured that the clamping portion 230 has a certain elasticity, so that after the sampling is completed, the second joint 200 and the mask interface can be smoothly disassembled.

[0038] Please continue to refer to Figure 2 , which is a right view of the second joint 200 in the gas cylinder sampling device for a respirator provided by an embodiment of the present invention. As Figure 2As shown, in some exemplary embodiments, a pair of through holes 212 corresponding to the two clamping members 231 one by one are provided along the circumferential direction of the second air inlet section 210. Thus, by providing a pair of through holes 212 corresponding to the two clamping members 231 one by one along the circumferential direction of the second air inlet section 210, the clamping members 231 can be installed in the through holes 212, thereby facilitating the installation of the clamping members 231 more conveniently.

[0039] Specifically, the through hole 212 extends from one outer wall of the second air inlet section 210 to the other outer wall of the second air inlet section 210 and communicates with the inner cavity of the second air inlet section 210. Thus, by setting both ends of the through hole 212 to extend to the outer wall of the second air inlet section 210, it is more convenient to install the clamping member 231 in the through hole 212, so as to facilitate the assembly of the gas cylinder sampling device for a respirator provided by the present utility model more conveniently.

[0040] Please continue to refer to Figure 1 , as Figure 1 shown, in some exemplary embodiments, the inner diameter of the second air inlet section 210 is greater than the inner diameter of the second air outlet section 220, and the outer diameter of the second air inlet section 210 is greater than the outer diameter of the second air outlet section 220. Thus, by setting the inner diameter of the second air inlet section 210 to be greater than the inner diameter of the second air outlet section 220, it can not only ensure that the second air inlet section 210 can be smoothly adapted to the mask interface, but also ensure that the second air outlet section 220 can be smoothly adapted to the first joint 100. By setting the outer diameter of the second air inlet section 210 to be greater than the outer diameter of the second air outlet section 220, it can not only ensure that the thickness of the second joint 200 can be kept generally consistent along its axial direction, but also save materials.

[0041] Please continue to refer to Figure 1 , as Figure 1 shown, in some exemplary embodiments, the inner diameter of the first air inlet section 110 is smaller than the inner diameter of the first air outlet section 120. Thus, by setting the inner diameter of the first air inlet section 110 to be smaller than the inner diameter of the first air outlet section 120, it can not only ensure that the first air outlet section 120 can be connected to a gas detector through a gas pipe, but also effectively prevent air leakage and ensure that the sampled gas can be smoothly transported to the gas detector through the gas pipe.

[0042] To achieve the above idea, the present utility model further provides a gas cylinder detection system for a breathing apparatus. The detection system includes a gas detector, a breathing apparatus, and the gas cylinder sampling device for a breathing apparatus described in any one of the above. Since the gas cylinder detection system for a breathing apparatus provided by the present utility model includes the gas cylinder sampling device for a breathing apparatus provided by the present utility model, the gas cylinder detection system for a breathing apparatus provided by the present utility model at least has all the beneficial effects of the gas cylinder sampling device for a breathing apparatus provided by the present utility model. For specific details, reference can be made to the relevant descriptions in the above text regarding the beneficial effects of the gas cylinder sampling device for a breathing apparatus provided by the present utility model, and no further elaboration will be provided here.

[0043] It should be noted that, as can be understood by those skilled in the art, the present utility model does not limit the specific structure and working principle of the gas detector. Regarding the specific structure and working principle of the gas detector, reference can be made to the relevant content in the field of gas detection well-known to those skilled in the art, and no further elaboration will be provided here.

[0044] In summary, compared with the prior art, the gas cylinder sampling device for a breathing apparatus and the gas cylinder detection system for a breathing apparatus provided by the present utility model have the following beneficial effects:

[0045] Since the first joint 100 of the gas cylinder sampling device for a breathing apparatus provided by the present utility model can be connected to the gas detector in communication, and the second joint 200 can be connected to the mask interface on the breathing apparatus in communication. Thus, when it is necessary to take a gas sample from the gas cylinder in the breathing apparatus, only need to connect the first joint 100 to the gas detector through a gas pipe, and connect the second joint 200 to the mask interface on the breathing apparatus. Thus, the high-pressure gas in the gas cylinder can be decompressed by a pressure reducer and then successively pass through a gas guide pipe and a gas supply valve to reach the sampling device provided by the present utility model, and finally be transported to the gas detector through the sampling device provided by the present utility model for detection, so that the sampling and detection of the gas in the gas cylinder of the breathing apparatus can be quickly completed. In summary, by adopting the gas cylinder sampling device for a breathing apparatus and the gas cylinder detection system for a breathing apparatus provided by the present utility model, it is no longer necessary to additionally configure a pressure reducer and a pressure gauge, which can not only reduce the sampling cost of the gas in the gas cylinder of the breathing apparatus, but also make the sampling operation more convenient, safe and reliable. In addition, since the first joint 100 and the second joint 200 in the sampling device provided by the present utility model are detachably connected, it is more convenient to assemble and disassemble the sampling device provided by the present utility model. Further, since the inner part of the second air inlet section 210 of the second joint 200 in the sampling device provided by the present utility model is provided with a clamping portion 230 for connecting to the mask interface on the breathing apparatus, through the clamping portion 230, the second joint 200 and the mask interface can be firmly connected, so as to ensure that the high-pressure gas in the gas cylinder can smoothly pass through the pressure reducer and then successively pass through the gas guide pipe and the gas supply valve to reach the sampling device provided by the present utility model.

[0046] It should be noted that in the description of this specification, the descriptions with reference to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" 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 expressions 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. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0047] It should also be noted that the above description is only a description of the preferred embodiments of the present utility model, and does not limit the scope of the present utility model in any way. Any changes and modifications made by those of ordinary skill in the art of the present utility model based on the above disclosure are within the protection scope of the present utility model. Obviously, those skilled in the art can make various changes and modifications to the utility model without departing from the spirit and scope of the present utility model. Thus, if these modifications and variations fall within the scope of the present utility model and its equivalent technologies, the present utility model is also intended to include these modifications and variations.

Claims

1. A gas cylinder sampling device for a breathing apparatus, characterized in that, It includes a first joint and a second joint that are interconnected. The first joint has a first air inlet section and a first air outlet section that are interconnected along its axial direction. The second joint has a second air inlet section and a second air outlet section that are interconnected along its axial direction. The first air inlet section is detachably inserted into the second air outlet section, and the first air outlet section is configured to be connected to a gas detector. The second air inlet section is configured to be connected to a mask interface on a breathing apparatus, and a clamping portion for clamping with the mask interface is provided inside the second air inlet section.

2. The gas cylinder sampling device for a breathing apparatus according to claim 1, wherein The first air inlet section is threadedly connected to the second air outlet section.

3. The gas cylinder sampling device for a breathing apparatus according to claim 1, characterized in that, Along its axial direction, the second joint is further provided with a gas buffer section located between the second air inlet section and the second air outlet section, and the gas buffer section is connected to the second air inlet section and the second air outlet section.

4. The gas cylinder sampling device for a breathing apparatus according to claim 3, characterized in that, The inner diameter of the gas buffer section is less than or equal to the inner diameter of the second air inlet section and greater than the inner diameter of the second air outlet section.

5. The gas cylinder sampling device for a respirator according to claim 4, characterized in that, A tapered portion is provided at one end of the second air inlet section close to the gas buffer section, and the inner diameter of the tapered portion gradually decreases in the direction close to the gas buffer section.

6. The gas cylinder sampling device for a respirator according to claim 1, characterized in that, The clamping portion includes a pair of clamping members extending circumferentially along the inner circumference of the second air inlet section, and the two clamping members are symmetrically arranged with respect to the axis of the second joint.

7. The gas cylinder sampling device for a breathing apparatus according to claim 6, characterized in that, A pair of through holes corresponding to the two clamping members one by one are provided along the circumferential direction of the second air inlet section.

8. The gas cylinder sampling device for a breathing apparatus according to claim 1, characterized in that, The inner diameter of the second air inlet section is greater than the inner diameter of the second air outlet section, and the outer diameter of the second air inlet section is greater than the outer diameter of the second air outlet section.

9. The gas cylinder sampling device for a breathing apparatus according to claim 1, characterized in that, The inner diameter of the first air inlet section is less than the inner diameter of the first air outlet section.

10. A gas cylinder detection system for a breathing apparatus, characterized in that, It includes a gas detector, a breathing apparatus, and a gas cylinder sampling device for a breathing apparatus according to any one of claims 1 to 9.

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