A portable natural gas detection device

Abstract

The utility model relates to a portable natural gas detection device, including detector body, one end is connected in the air inlet pipe of detector body and one end is communicated in the exhaust pipe of detector body, the portable natural gas detection device still includes the filter assembly of installing in the air inlet pipe and the air extraction subassembly of installing in the exhaust pipe, the filter assembly includes one end is connected and is communicated in the fixed sleeve of the air inlet pipe another end and installs the filter core in the fixed sleeve, the utility model can improve the weak filtering function of the existing portable natural gas detection device, and the instrument inside can cause too much dust, impurity to accumulate in long -time detection process, influence the service life and the technical problem of use effect.

Description

TECHNICAL FIELD

[0001] The utility model relates to natural gas equipment technical field especially relates to a portable natural gas detection device. BACKGROUND

[0002] Natural gas is contained in the underground porous rock layer, including oilfield gas, gas field gas, coal bed gas, mud volcano gas and biological generation gas etc, also have a small amount from coal seam, it is high quality fuel and chemical raw material, natural gas is easy to leak in the collection process, therefore the staff needs to use natural gas detector to judge whether natural gas leaks or not to ensure the safety of construction environment. However, the existing portable natural gas detection device has weak filtering function, in the use process, the air inlet pipe of the detection device is easy to carry dust and small particle impurities in the air into the detection instrument body, long time use can cause the detection instrument to accumulate too much dust and impurities inside, which can easily affect the service life of the overall device. SUMMARY

[0003] The utility model provides a portable natural gas detection device in view of the weak filtering function of the existing portable natural gas detection device, which can accumulate too much dust and impurities inside the instrument during long time detection, affecting the service life and use effect.

[0004] The utility model solves the technical scheme as follows:

[0005] A portable natural gas detection device, including detection instrument body, the air inlet pipe of one end is connected to the detection instrument body and the exhaust pipe of one end is communicated to the detection instrument body, the portable natural gas detection device still includes the filter assembly of installation in the air inlet pipe and the air extraction assembly of installation in the exhaust pipe, the filter assembly includes the fixed sleeve of one end connection and communication in the air inlet pipe another end and installs the filter core in the fixed sleeve.

[0006] The utility model has the advantages that: during the detection process, under the action of the air extraction assembly, the gas enters the detection instrument body through the air inlet pipe and is discharged from the detection instrument body to the exhaust pipe, during the whole process, when the gas enters the air inlet pipe, it is filtered by the filter core to purify the gas detected by the detection instrument body, which improves the weak filtering function of the existing portable natural gas detection device, which can accumulate too much dust and impurities inside the instrument during long time detection, affecting the service life and use effect.

[0007] On the basis of the above technical scheme, the utility model can also be improved as follows.

[0008] Further, the air extraction assembly comprises a connecting rod fixedly connected to the exhaust pipe, a rotating motor installed on the connecting rod, a rotating rod coaxially fixedly connected to an output shaft of the rotating motor, and an air extraction blade fixedly connected to one end of the rotating rod and having the other end close to the detector body and a blade surface facing the detector body.

[0009] The beneficial effect of the further scheme is that during the detection, the rotating motor is started to drive the air extraction blade to rotate through the transmission of the rotating rod, thereby realizing the air extraction operation.

[0010] Further, one end of the fixing sleeve is detachably connected to the other end of the air inlet pipe.

[0011] The beneficial effect of the further scheme is that the filter core can be cleaned, replaced, etc. by removing the fixing sleeve.

[0012] Further, one end of the fixing sleeve is detachably connected to the other end of the air inlet pipe.

[0013] The beneficial effect of the further scheme is that the filter core is limitedly installed by the limiting of the positioning plates, so that the positioning plates can be removed when the filter core needs to be removed.

[0014] Further, the portable natural gas detection device further comprises a shell, the detector body is installed in the shell, and the other end of the air inlet pipe and the exhaust pipe penetrates out of the shell.

[0015] The beneficial effect of the further scheme is that the shell protects the detector body, reduces the possibility of dust entering the detector body, and ensures the service life of the detector body.

[0016] Further, the portable natural gas detection device further comprises a battery pack for supplying power to the detector body; the shell is provided with a rectangular groove for placing the battery pack, and a sealing cover is detachably connected to a groove opening of the rectangular groove.

[0017] The beneficial effect of the further scheme is that the battery pack can be replaced by removing the sealing cover.

[0018] Further, a plurality of positioning holes are formed in the left and right ends of the sealing cover, and a plurality of connecting grooves are formed in the shell and communicate with the positioning holes, and a fixing assembly is arranged in each connecting groove, the fixing assembly comprises a spring fixed to the wall of the connecting groove at one end and a positioning column fixed to the other end of the spring at one end, and the other end of the positioning column extends out of the connecting groove and is inserted into the positioning hole.

[0019] The beneficial effect of the further scheme is that the positioning column slides out of the connecting groove and is inserted into the positioning hole by the elastic force of the spring, that is, the positioning and installation of the sealing cover are realized by the insertion of a plurality of positioning columns, and when the storage battery needs to be taken out, the spring is applied with force, the positioning column is recovered and separated from the positioning hole, thereby improving the technical problem that the sealing cover is fixed by bolts in the prior art, and the storage battery is inconvenient to take out and replace.

[0020] Further, the fixing assembly further comprises a connecting rope fixed to one end of each positioning column, the other end of the connecting rope slidably penetrates the inner wall of the connecting groove and extends out of the shell, and a pull ring is fixed to the other end of the connecting rope.

[0021] The beneficial effect of the further scheme is that the spring is compressed by applying force through the pull ring.

[0022] Further, a baffle is fixed to one end of the positioning column, the baffle is fixed to the other end of the spring, and the end of the baffle is slidably connected to the wall of the connecting groove.

[0023] The beneficial effect of the further scheme is that the baffle and the wall of the connecting groove slide relative to each other to form a limit, which can prevent the spring from being bent and the like, so as to ensure the service life of the spring.

[0024] Further, a positioning groove is formed in the inner wall of the rectangular groove, and a positioning plate adapted to be inserted into the positioning groove is fixed to the sealing cover.

[0025] The beneficial effect of the further scheme is that the positioning plate at the bottom end of the sealing cover is inserted into the inside of the positioning groove during use, thereby achieving the effect that the sealing cover is fixed and positioned at the bottom while the fixing assembly fixes the two sides of the sealing cover. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a partial explosion view of the portable natural gas detection device of the utility model;

[0027] Figure 2 It is a schematic view of the internal structure of the portable natural gas detection device of the utility model;

[0028] Figure 3 It is a schematic view of the internal structure of the portable natural gas detection device of the utility model;Figure 1 Enlarged view of part A;

[0029] Figure 4 For the utility model Figure 1 Enlarged view of part B;

[0030] Figure 5 For the utility model Figure 2 Enlarged view of part C;

[0031] Figure 6 For the utility model Figure 2 Enlarged view of part D.

[0032] In the drawings, the component list represented by each reference numeral is as follows:

[0033] 1, shell;2, mounting groove;3, detector body;4, air inlet pipe;5, exhaust pipe;6, rectangular groove;7, battery pack;8, sealing cover;9, pull rod;10, positioning hole;11, connecting groove;12, connecting rope;13, pull ring;14, connecting rod;15, rotating motor;16, rotating rod;17, air extraction blade;18, fixed sleeve;19, positioning plate;20, filter element;21, spring;22, baffle;23, positioning column;24, loudspeaker;25, display screen;26, control button;27, positioning groove;28, positioning plate. DETAILED DESCRIPTION

[0034] The principles and features of the utility model are described below in conjunction with the drawings, and the examples are only used to explain the utility model and not to limit the scope of the utility model.

[0035] Example 1

[0036] As Figures 1 to 5 A portable natural gas detection device, including detector body 3, one end is connected to the air inlet pipe 4 of the detector body 3 and one end is communicated to the exhaust pipe 5 of the detector body 3, the portable natural gas detection device further includes a filter assembly installed in the air inlet pipe 4 and an air extraction assembly installed in the exhaust pipe 5, the filter assembly includes a fixed sleeve 18 connected to one end of the air inlet pipe 4 and communicated to the other end of the air inlet pipe 4 and a filter element 20 installed in the fixed sleeve 18.

[0037] The beneficial effects of the embodiment are: during the detection process, under the action of the air extraction assembly, the gas enters the detector body 3 through the air inlet pipe 4 and is discharged from the detector body 3 to the exhaust pipe 5, and during the entire process, the gas is filtered by the filter element 20 when entering the air inlet pipe 4, to purify the gas entering the detector body 3 for detection, to improve the technical problem that the existing portable natural gas detection device has weak filtering function and may cause excessive dust and impurities to accumulate inside the instrument during long-term detection, affecting the service life and use effect.

[0038] Wherein, the air inlet pipe 4 and the air outlet pipe 5 are both through-hole structures with through holes along the length direction, so as to respectively install, dismount the filter assembly and the air extraction assembly, and realize the flow of gas.

[0039] On the basis of the above embodiment, the detector body 3 is electrically connected with a loudspeaker 24 on both sides, and the detector body 3 is electrically connected with a display screen 25 at the top end, and the detector body 3 is further provided with a plurality of control buttons 26. Through the setting of the loudspeaker 24, the display screen 25 and the control buttons 26, when the detector body 3 detects that the gas carries natural gas, the detector personnel can be prompted through the loudspeaker 24, and the content of the gas carrying natural gas can be displayed through the display screen 25, so as to achieve the effect of warning the operator, facilitating observation and recording.

[0040] It should be noted that the detector body 3 can adopt a portable detector purchased in the market, which is a conventional technical means in the art, and therefore will not be described in detail here.

[0041] Embodiment 2

[0042] As Figures 1 to 5 On the basis of embodiment 1, the air extraction assembly comprises a connecting rod 14 fixedly connected in the air outlet pipe 5, a rotating motor 15 installed on the connecting rod 14, a rotating rod 16 coaxially fixedly connected at one end to the output shaft of the rotating motor 15, and an air extraction blade 17 fixedly connected at one end to the other end of the rotating rod 16, the air extraction blade 17 being close to the detector body 3 relative to the rotating motor 15, and the blade surface facing the detector body 3.

[0043] The beneficial effect of adopting the preferred scheme in the above embodiment is that during the detection process, the rotating motor 15 is started, the air extraction blade 17 is driven to rotate through the transmission of the rotating rod 16, and the air extraction operation is realized.

[0044] On the basis of the above embodiment, the air extraction assembly further comprises a protective cover (not shown in the figure), and the rotating motor 15 is installed in the protective cover to protect the rotating motor 15.

[0045] Embodiment 3

[0046] As Figure 1 And Figure 2 On the basis of embodiments 1 and 2, one end of the fixed sleeve 18 is detachably connected to the other end of the air inlet pipe 4.

[0047] The beneficial effect of adopting the preferred scheme in the above embodiment is that the filter element 20 can be cleaned, replaced and the like by removing the fixed sleeve 18.

[0048] As a specific solution of the above embodiment, one end of the fixed sleeve 18 is detachably connected to the air inlet pipe 4 by screwing, clamping or other means, and can be screwed to the inner side or outer side of the air inlet pipe 4.

[0049] As a parallel solution of the above embodiment, the fixed sleeve 18 can also be connected to the air inlet pipe 4 by a screw.

[0050] Embodiment 4

[0051] As Figure 2 and Figure 5 On the basis of embodiments 1-3, one end of the fixed sleeve 18 is detachably connected to the outer side of the other end of the air inlet pipe 4; the inner wall of the other end of the fixed sleeve 18 is detachably connected to at least one positioning plate 19, and the filter element 20 is clamped between the other end of the air inlet pipe 4 and each positioning plate 19.

[0052] The beneficial effect of using the preferred solution in the above embodiment is that the positioning of the filter element 20 is achieved by the limiting of each positioning plate 19, so that when the filter element 20 needs to be removed, each positioning plate 19 can be removed first.

[0053] As a specific solution of the above embodiment, the positioning plate 19 can be one, two, three or four, etc. In the figure, the positioning plate 19 is only shown as two.

[0054] On the basis of the above embodiment, the positioning plate 19 can be installed by insertion; it can also be installed by screwing. When installed by screwing, the positioning plate 19 is screwed to the air inlet pipe 4 along the radial direction of the air inlet pipe 4, and the rod portion is in abutment with the filter element 20.

[0055] Embodiment 5

[0056] As Figure 1 and Figure 2 On the basis of embodiments 1-4, the portable natural gas detection device further comprises a shell 1, and the detector body 3 is installed in the shell 1, and the other end of the air inlet pipe 4 and the exhaust pipe 5 both pass out of the shell 1.

[0057] The beneficial effect of using the preferred solution in the above embodiment is that the shell 1 protects the detector body 3, reduces the possibility of dust entering the detector body 3, and ensures the service life of the detector body 3.

[0058] On the basis of the above embodiment, the shell 1 is a profiled structure relative to the detector body 3, so as to hold the shell 1 for detection operation. An installation groove 2 is provided on the shell 1 for installation of the detector body 3.

[0059] An observation opening is formed on the shell 1 and cooperates with the display screen 25 to read the information displayed on the display screen 25; and a plurality of mounting holes are formed on the shell 1 to mount the loudspeaker 24, the control button 26, the air inlet pipe 4 and the air outlet pipe 5.

[0060] Embodiment 6

[0061] As Figure 1 and Figure 2 On the basis of Embodiments 1-5, the portable natural gas detection device further comprises a battery pack 7 for supplying power to the detection instrument body 3; the shell 1 is formed with a rectangular groove 6 for placing the battery pack 7, and a sealing cover 8 is detachably connected to the groove opening of the rectangular groove 6.

[0062] The beneficial effect of the preferred scheme in the above embodiment is that the replacement of the battery pack 7 is realized by removing the sealing cover 8.

[0063] On the basis of the above embodiments, a pull rod 9 is fixed on the sealing cover 8 to realize the disassembly and assembly of the sealing cover 8 through the pull rod 9.

[0064] Embodiment 7

[0065] As Figures 1 to 6 On the basis of Embodiments 1-6, a plurality of positioning holes 10 are formed on the left and right ends of the sealing cover 8, and the shell 1 is formed with a plurality of connecting grooves 11 which are in one-to-one communication with the positioning holes 10; a fixing assembly is arranged in each connecting groove 11, and the fixing assembly comprises a spring 21 fixedly connected to one end of the connecting groove 11 and a positioning column 23 fixedly connected to the other end of the spring 21, and the other end of the positioning column 23 extends out of the connecting groove 11 and is inserted into the positioning hole 10.

[0066] The beneficial effect of the preferred scheme in the above embodiment is that the positioning column 23 is made to slide out of the connecting groove 11 and be inserted into the positioning hole 10 by using the elastic force of the spring 21, that is, the positioning and installation of the sealing cover 8 are realized by using the insertion of a plurality of positioning columns 23; when the battery pack 7 needs to be taken out, the spring 21 is subjected to a force, and the positioning column 23 is retracted and separated from the positioning hole 10, which improves the technical problem in the prior art that the sealing cover 8 is fixed by bolts, resulting in the inconvenience of taking out and replacing the battery pack 7.

[0067] As a specific scheme of the above embodiment, the connecting groove 11 is formed on one side in the thickness direction of the shell 1, and the opposite two inner walls thereof are formed into an open structure to realize the communication with the positioning hole 10.

[0068] Embodiment 8

[0069] As Figures 1 to 6On the basis of the embodiments 1-7, the fixing assembly further comprises a connecting rope 12 fixedly connected to one end of each positioning column 23, the other end of the connecting rope 12 slidingly penetrates the inner wall of the connecting groove 11 and extends out of the shell 1, and the other end of the connecting rope 12 is fixedly connected with a pull ring 13.

[0070] The beneficial effect of the preferred scheme in the above embodiments is that the compression of the spring 21 is realized by applying force through the pull ring 13.

[0071] Among them, the other end of the connecting rope 12 is threaded out from the opening of the inner wall of the connecting groove 11.

[0072] Embodiment 9

[0073] As Figures 1 to 6 On the basis of the embodiments 1-8, the one end of the positioning column 23 is fixedly connected with a baffle 22, the baffle 22 is fixedly connected to the other end of the spring 21, and the end of the baffle 22 is slidingly connected to the groove wall of the connecting groove 11.

[0074] The beneficial effect of the preferred scheme in the above embodiments is that the baffle 22 slides against the groove wall of the connecting groove 11 to form a limit, which can prevent the spring 21 from being bent and other phenomena, so as to ensure the service life of the spring 21.

[0075] On the basis of the above embodiments, one end of the connecting rope 12 is fixedly connected to the baffle 22.

[0076] Embodiment 10

[0077] As Figure 1 And Figure 2 On the basis of the embodiments 1-9, the inner wall of the rectangular groove 6 is provided with a positioning groove 27, and the sealing cover 8 is fixed with a positioning plate 28 which is adapted and inserted into the positioning groove 27.

[0078] The beneficial effect of the preferred scheme in the above embodiments is that the positioning plate 28 at the bottom end of the sealing cover 8 is inserted into the inside of the positioning groove 27 during use, so as to achieve the effect of positioning and fixing the bottom of the sealing cover 8 while fixing the two sides of the sealing cover 8 by the fixing assembly.

[0079] Working principle: through the setting of connecting rod 14, rotating motor 15, rotating rod 16 and suction blade 17, when using, drive rotating motor 15, drive rotating rod 16 to rotate, rotating rod 16 drives suction blade 17 to rotate, so that the end of intake pipe 4 in contact with the outside inhales gas, and the effect of detecting instrument body 3 is achieved; and through the setting of fixed sleeve 18, positioning plate 19 and filter element 20, when using, when intake pipe 4 absorbs gas, filter element 20 can isolate dust and small particle impurities carried by the gas outside or inside fixed sleeve 18, and rotating fixed sleeve 18 can take out fixed sleeve 18 from the other end of intake pipe 4, which is convenient for replacing the internal filter element 20, so as to avoid the damage of dust and small particle impurities carried by the gas to detecting instrument body 3, and improve the service life of the whole device.

[0080] At the same time, through the setting of spring 21, baffle 22 and positioning column 23, when using, place sealing cover 8 on the top of rectangular groove 6, spring 21 abuts against baffle 22, baffle 22 drives positioning column 23 to insert into positioning hole 10 on both sides of sealing cover 8, which is convenient for fixing sealing cover 8 on the top of rectangular groove 6, so as to avoid the exposure of battery pack 7; and through the setting of connecting rope 12 and pull ring 13, when it is necessary to replace battery pack 7, pull pull ring 13, pull ring 13 drives connecting rope 12 to move, connecting rope 12 drives baffle 22 to move, baffle 22 drives positioning column 23 to move away from the inside of positioning hole 10 on both sides of sealing cover 8, and pull the pull rod 9 on one side of sealing cover 8, so as to achieve the effect of conveniently taking down sealing cover 8 and reducing the difficulty of replacing battery pack 7.

[0081] Through the setting of loudspeaker 24, display screen 25 and control button 26, when using, when detecting instrument body 3 detects natural gas carried in the gas, loudspeaker 24 can give a prompt to the detector; and display screen 25 can display the content of natural gas carried in the gas, so as to achieve the effect of warning the operator while observing and recording; through the setting of positioning groove 27 and positioning plate 28, when using, insert positioning plate 28 at the bottom of sealing cover 8 into positioning groove 27, so as to achieve the effect of fixing sealing cover 8 on both sides of the fixed assembly while fixing the bottom of sealing cover 8.

[0082] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0083] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0084] In the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0085] In the utility model, unless otherwise specifically defined and limited, the first feature "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0086] In the description of the present specification, the description referring to the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means 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 application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. Furthermore, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples, without contradiction.

[0087] Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and the person skilled in the art can make changes, modifications, replacements and modifications to the above embodiments within the scope of the present application.

Claims

1. A portable natural gas detection device, comprising a detector body (3), an inlet pipe (4) connected at one end to the detector body (3), and an exhaust pipe (5) connected at one end to the detector body (3), characterized in that, The portable natural gas detection device also includes a filter assembly installed in the air inlet pipe (4) and an air extraction assembly installed in the exhaust pipe (5). The filter assembly includes a fixing sleeve (18) connected to and communicating with the other end of the air inlet pipe (4) and a filter element (20) installed in the fixing sleeve (18).

2. The portable natural gas detection device according to claim 1, characterized in that, The exhaust assembly includes a connecting rod (14) fixedly connected to the exhaust pipe (5), a rotating motor (15) installed on the connecting rod (14), a rotating rod (16) with one end coaxially fixedly connected to the output shaft of the rotating motor (15), and an exhaust blade (17) with one end fixedly connected to the other end of the rotating rod (16). The exhaust blade (17) is close to the detector body (3) relative to the rotating motor (15), and the blade surface faces the detector body (3).

3. The portable natural gas detection device according to claim 1, characterized in that, One end of the fixing sleeve (18) is detachably connected to the other end of the air intake pipe (4).

4. The portable natural gas detection device according to claim 1, characterized in that, One end of the fixing sleeve (18) is detachably connected to the outer side of the other end of the air intake pipe (4); at least one positioning plate (19) is detachably connected to the inner wall of the other end of the fixing sleeve (18), and the filter element (20) is stuck between the other end of the air intake pipe (4) and each of the positioning plates (19).

5. A portable natural gas detection device according to any one of claims 1-4, characterized in that, The portable natural gas detection device also includes a housing (1), the detector body (3) is installed inside the housing (1), and the other ends of the air inlet pipe (4) and the exhaust pipe (5) both extend out of the housing (1).

6. The portable natural gas detection device according to claim 5, characterized in that, The portable natural gas detection device also includes a battery pack (7) for powering the detector body (3); the housing (1) has a rectangular slot (6) for placing the battery pack (7), and a sealing cap (8) is detachably connected to the opening of the rectangular slot (6).

7. The portable natural gas detection device according to claim 6, characterized in that, The sealing cover (8) has multiple positioning holes (10) at both ends, and the housing (1) has multiple connecting grooves (11) that connect to each of the positioning holes (10). Each connecting groove (11) is provided with a fixing component. The fixing component includes a spring (21) fixedly connected to the wall of the connecting groove (11) at one end and a positioning post (23) fixedly connected to the other end of the spring (21) at one end. The other end of the positioning post (23) extends out of the connecting groove (11) and is inserted into the positioning hole (10).

8. The portable natural gas detection device according to claim 7, characterized in that, The fixing assembly also includes a connecting rope (12) with one end fixedly connected to one end of each of the positioning posts (23), the other end of the connecting rope (12) sliding through the inner wall of the connecting groove (11) and extending out of the housing (1), and a pull ring (13) fixedly connected to the other end of the connecting rope (12).

9. A portable natural gas detection device according to claim 7, characterized in that, One end of the positioning post (23) is fixedly connected to a baffle (22), the baffle (22) is fixedly connected to the other end of the spring (21), and the end of the baffle (22) is slidably connected to the groove wall of the connecting groove (11).

10. A portable natural gas detection device according to claim 7, characterized in that, The inner wall of the rectangular groove (6) is provided with a positioning groove (27), and the sealing cover (8) is fixed with a positioning plate (28) that is adapted to and inserted into the positioning groove (27).

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