Harmful gas monitoring equipment

Abstract

The utility model belongs to the technical field of harmful gas monitoring, and particularly relates to harmful gas monitoring equipment which comprises a protective shell and an installation groove, the installation groove is formed in the protective shell and communicated with the outside, an insertion groove is formed in the inner wall of the installation groove, and a silicon rubber sleeve is fixedly connected in the installation groove. A harmful gas monitoring equipment body is fixedly connected in the silicon rubber case; the two rotating grooves are symmetrically formed in the inner wall of the mounting groove, rotating blocks are rotationally connected into the rotating grooves, one ends of the rotating blocks penetrate through the inner walls of the rotating grooves and extend into the mounting groove, clockwork springs are arranged on the rotating blocks, and one ends of the clockwork springs are fixed to the peripheral sides of the rotating blocks; according to the toxic and harmful gas monitoring device, the problem that when a medical worker takes the toxic and harmful gas monitoring device by hand and does not pay attention to the toxic and harmful gas monitoring device, the toxic and harmful gas monitoring device is likely to be separated from the hand, and the toxic and harmful gas monitoring device is damaged is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of harmful gas monitoring, and in particular relates to a harmful gas monitoring device. Background Art

[0002] Harmful gas monitoring equipment is a device used to detect the concentration of harmful gases in the air. Through specific sensors or detection technologies, it can accurately monitor and display the content of harmful gases in real time, thereby helping people take corresponding measures in time to ensure personnel safety and health;

[0003] In order to protect the health of medical staff and patients, most medical staff will use harmful gas monitors to test the air in the hospital to ensure the cleanliness and safety of the air in the hospital, thereby ensuring the health of medical staff and patients.

[0004] For example, a Chinese patent with publication number CN219715402U discloses a toxic and harmful gas monitor, which relates to the field of gas monitoring and includes a gas detector body, the upper side of which is fixedly connected to an air inlet pipe, and a connecting hose is sleeved on the top of the air inlet pipe, a fixing frame is provided on the upper side of the air inlet pipe, and the inner wall of the fixing frame is symmetrically provided with slots, the inner walls of the slots are all fixedly connected with screw sleeves, and a screw is inserted inside the screw sleeve. The utility model is provided with a screw and a limit plate to ensure the tight connection between the connecting hose and the air inlet pipe, which can effectively prevent the connecting hose from falling off the air inlet pipe after being stretched open, so as to ensure the smooth progress of the detection work, and is provided with a sealing plate and a torsion spring to achieve sealing of the upper side of the air inlet pipe, thereby effectively preventing dust and impurities in the air from entering the gas detector body through the air inlet pipe, so as to ensure the service life of the gas detector body.

[0005] The above patent has the following problems:

[0006] This patent has some disadvantages when used, such as: the above-mentioned toxic and harmful gas monitor is mostly used by hand, but when the medical staff holds the toxic and harmful gas monitor without paying attention, the toxic and harmful gas monitor may fall out of the hand, causing damage to the toxic and harmful gas monitor. In view of this, we propose a harmful gas monitoring device. Utility Model Content

[0007] The purpose of the utility model is to provide a harmful gas monitoring device to solve the problems raised in the above background technology.

[0008] In view of this, the utility model provides a harmful gas monitoring device, including:

[0009] A protective shell and a mounting groove, wherein the mounting groove is provided in the protective shell and communicates with the outside, a slot is provided on the inner wall of the mounting groove, a silicone sleeve is fixedly connected in the mounting groove, and a harmful gas monitoring device body is fixedly connected in the silicone sleeve;

[0010] Two rotating grooves, the two rotating grooves are symmetrically opened on the inner wall of the installation groove, a rotating block is rotatably connected in the rotating groove, and one end of the rotating block passes through the inner wall of the rotating groove and extends into the installation groove, a clockwork spring is arranged on the rotating block, and one end of the clockwork spring is fixed to the peripheral side of the rotating block, and the other end of the clockwork spring is fixed to the inner wall of the rotating groove, a cover plate is fixedly connected between the two rotating blocks, and one end of the cover plate is located in the slot and plugged into the slot, and a silicone plate is fixedly connected to the bottom surface of the cover plate;

[0011] The fixing component is located in the protective shell and is used to fix the cover plate.

[0012] Based on the above structure, the silicone sleeve and silicone plate are set to ensure that when the whole device falls on the ground, the silicone sleeve and silicone plate can protect the harmful gas monitoring device body to prevent damage to the harmful gas monitoring device body; the rotating groove, rotating block and cover plate are set to ensure that the two rotating blocks can rotate in the two rotating grooves respectively and drive the cover plate to rotate; the fixing component and mounting groove are set to ensure that the user can fix the cover plate in the mounting groove through the fixing component; the clockwork spring is set to ensure that when the user accidentally drops the whole device when using the harmful gas monitoring device body, the two rotating blocks will be respectively affected by the elastic force of the two clockwork springs to drive the cover plate to reset, so that the cover plate will cover the protective shell again, protect the harmful gas monitoring device body, and prevent damage to the harmful gas monitoring device body; the limit component and socket are set to ensure that the user can fix the extrusion block through the limit component and the socket to prevent the extrusion block from moving when the whole device falls on the ground and touches the extrusion block.

[0013] In the above technical solution, further, the fixing assembly includes:

[0014] A first slide groove, wherein the first slide groove is provided on the inner wall of the slot, a first plug block is slidably connected in the first slide groove, and one end of the first plug block penetrates one end of the cover plate and extends into the cover plate to be plugged and matched with the cover plate, an extrusion groove is provided on the first plug block, and the other end of the first plug block is fixedly connected to a return spring fixed to the inner wall of the first slide groove;

[0015] A second chute, wherein the second chute is disposed on the inner wall of the first chute and is in communication with the outside, wherein an extrusion block is slidably connected in the second chute, and one end of the extrusion block is located in the extrusion groove, and an insertion hole is disposed on the extrusion block;

[0016] The limiting component is located in the protective shell and is used to fix the extrusion block.

[0017] In this case, it is ensured that the cover plate can be quickly fixed in the installation groove and cannot be moved.

[0018] In the above technical solution, further, one end of the extrusion block is plugged into and matched with the extrusion groove, and one end of the extrusion block is arranged at an angle.

[0019] Among them, it is ensured that one end of the extrusion block can be inserted into the extrusion groove, and it is ensured that one end of the extrusion block can extrude the extrusion groove.

[0020] In the above technical solution, further, one end of the first plug is arranged to be inclined.

[0021] Wherein, it is ensured that one end of the first plug block can be squeezed by one end of the cover plate to move.

[0022] In the above technical solution, further, the limit assembly includes:

[0023] The third slide groove is provided in the protective shell and is connected to the outside world. A second plug block is slidably connected in the third slide groove, and one end of the second plug block extends into the socket and is plugged into the socket. A threaded rod is threadedly connected to the second plug block, and the threaded rod is located in the third slide groove and is rotatably connected to the third slide groove. A rotating rod is fixedly connected to one end of the threaded rod, and one end of the rotating rod passes through the inner wall of the third slide groove and extends to the outside world and is rotatably connected to the protective shell.

[0024] Among them, ensure that the extrusion block will not move due to external influences.

[0025] In the above technical solution, further, one end of the rotating block is rotatably connected to the mounting groove.

[0026] Herein, it is ensured that one end of the rotating block can rotate normally in the mounting groove.

[0027] The beneficial effects of the utility model are:

[0028] 1. The harmful gas monitoring device, through the provision of silicone sleeve and silicone plate, ensures that when the whole falls on the ground, the silicone sleeve and silicone plate can protect the harmful gas monitoring device body to prevent damage to the harmful gas monitoring device body; through the provision of rotating grooves, rotating blocks and cover plates, ensure that the two rotating blocks can rotate in the two rotating grooves respectively and drive the cover plate to rotate; through the provision of fixing components and mounting grooves, ensure that the user can fix the cover plate in the mounting groove through the fixing components; through the provision of spring springs, ensure that when the user accidentally drops the whole device while using the harmful gas monitoring device body, the two rotating blocks will be respectively affected by the elastic force of the two spring springs to drive the cover plate to reset, so that the cover plate will cover the protective shell again, protect the harmful gas monitoring device body to prevent damage to the harmful gas monitoring device body; when medical staff hold the toxic and harmful gas monitor in their hands without paying attention, the toxic and harmful gas monitor may fall out of their hands, causing damage to the toxic and harmful gas monitor.

[0029] 2. The harmful gas monitoring equipment ensures that the user can fix the extrusion block through the limit components and the sockets to prevent the extrusion block from moving when the entire device falls to the ground and touches the extrusion block. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0031] Figure 2 It is a schematic diagram of the explosion structure of the area of ​​the utility model;

[0032] Figure 3 It is a schematic diagram of the regional structure of the rotating block of the utility model;

[0033] Figure 4 This is one of the schematic diagrams of the internal structure of the protective shell of the utility model;

[0034] Figure 5 It is a schematic diagram of the overall structure of the first plug-in block of the utility model;

[0035] Figure 6 This is the second schematic diagram of the internal structure of the protective shell of the utility model.

[0036] The symbols in the figure are:

[0037] 1. Protective shell; 2. Mounting slot; 3. Silicone sleeve; 4. Harmful gas monitoring equipment body; 5. Rotating slot; 6. Rotating block; 7. Spring; 8. Cover plate; 9. Silicone plate; 10. Slot; 11. First slide slot; 12. First plug-in block; 13. Extrusion slot; 14. Reset spring; 15. Second slide slot; 16. Extrusion block; 17. Socket; 18. Third slide slot; 19. Second plug-in block; 20. Threaded rod; 21. Rotating rod. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0039] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0040] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0041] It should be noted that, in the description of the present application, the orientation or positional relationship indicated by terms such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise stated, these orientation words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application; the orientation words "inside and outside" refer to the inside and outside relative to the contour of each component itself.

[0042] It should be noted that, in the present application, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or 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 process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be noted that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0043] Embodiment 1:

[0044] See also Figure 1 - Figure 6 As shown, this embodiment provides a harmful gas monitoring device, including:

[0045] A protective shell 1 and a mounting groove 2, wherein the mounting groove 2 is provided in the protective shell 1 and communicates with the outside, a slot 10 is provided on the inner wall of the mounting groove 2, a silicone sleeve 3 is fixedly connected in the mounting groove 2, and a harmful gas monitoring device body 4 is fixedly connected in the silicone sleeve 3;

[0046] Two rotating grooves 5, the two rotating grooves 5 are symmetrically opened on the inner wall of the installation groove 2, a rotating block 6 is rotatably connected in the rotating groove 5, and one end of the rotating block 6 passes through the inner wall of the rotating groove 5 and extends into the installation groove 2, a clockwork spring 7 is arranged on the rotating block 6, and one end of the clockwork spring 7 is fixed to the peripheral side of the rotating block 6, and the other end of the clockwork spring 7 is fixed to the inner wall of the rotating groove 5, a cover plate 8 is fixedly connected between the two rotating blocks 6, and one end of the cover plate 8 is located in the slot 10 and plugged into the slot 10, and a silicone plate 9 is fixedly connected to the bottom surface of the cover plate 8;

[0047] The fixing component is located in the protective shell 1 and is used to fix the cover plate 8 .

[0048] Embodiment 2:

[0049] This embodiment provides a harmful gas monitoring device, which, in addition to the technical solutions of the above embodiments, also has the following technical features, and the fixing component includes:

[0050] A first slide groove 11 is provided on the inner wall of the slot 10, a first plug block 12 is slidably connected in the first slide groove 11, and one end of the first plug block 12 passes through one end of the cover plate 8 and extends into the cover plate 8 to be plugged and matched with the cover plate 8, an extrusion groove 13 is provided on the first plug block 12, and the other end of the first plug block 12 is fixedly connected to a return spring 14 fixed to the inner wall of the first slide groove 11;

[0051] A second chute 15, which is provided on the inner wall of the first chute 11 and communicates with the outside, wherein an extrusion block 16 is slidably connected in the second chute 15, and one end of the extrusion block 16 is located in the extrusion groove 13, and an insertion hole 17 is provided on the extrusion block 16;

[0052] The limiting component is located in the protective shell 1 and is used to fix the extrusion block 16.

[0053] Among them, the user presses the squeezing block 16 with his hand, allowing one end of the squeezing block 16 to squeeze the squeezing groove 13, so that one end of the first plug block 12 enters the first slide groove 11 from the cover plate 8, and allows the other end of the first plug block 12 to compress the reset spring 14, and then the user rotates the cover plate 8 by hand, allowing the cover plate 8 to drive the two rotating blocks 6 to rotate in the two rotating grooves 5 respectively. When the two rotating blocks 6 rotate, the two rotating blocks 6 will respectively drive the two clockwork springs 7 to contract. At this time, the harmful gas monitoring device body 4 is completely exposed to the outside world, and then the user releases the hand pressing the squeezing block 16, allowing one end of the first plug block 12 to move from the first slide groove 11 to the slot 10 under the action of the rebound force of the first slide groove 11, and at the same time, the squeezing block 16 will also reset, and then the user can perform the harmful gas monitoring device body 4. When the user accidentally drops it during use, the user's hand will release the restriction on the cover 8. At this time, the two rotating blocks 6 will be respectively rotated in opposite directions by the elastic force of the two clockwork springs 7, so that the two rotating blocks 6 drive the cover 8 to rotate in the installation slot 2, and insert one end of the cover 8 into the slot 10. When one end of the cover 8 is inserted into the slot 10, the cover 8 will squeeze one end of the first plug block 12, so that one end of the first plug block 12 enters the first slide groove 11 from the slot 10 and the other end of the first plug block 12 compresses the reset spring 14. When one end of the cover 8 is completely entered into the slot 10, one end of the first plug block 12 will be inserted into the cover 8 by the rebound force of the reset spring 14, ensuring that the cover 8 can be quickly fixed in the installation slot 2 and cannot move.

[0054] Embodiment 3:

[0055] This embodiment provides a harmful gas monitoring device, which, in addition to the technical solutions of the above embodiments, also has the following technical features: one end of the extrusion block 16 is plugged into the extrusion groove 13, and one end of the extrusion block 16 is inclined.

[0056] Here, it is ensured that one end of the extrusion block 16 can be inserted into the extrusion groove 13 , and it is ensured that one end of the extrusion block 16 can extrusion the extrusion groove 13 .

[0057] Embodiment 4:

[0058] This embodiment provides a harmful gas monitoring device, which, in addition to the technical solutions of the above embodiments, also has the following technical features: one end of the first plug block 12 is inclined.

[0059] Here, it is ensured that one end of the first plug block 12 can be squeezed by one end of the cover plate 8 to move.

[0060] Embodiment 5:

[0061] This embodiment provides a harmful gas monitoring device, which, in addition to the technical solutions of the above embodiments, also has the following technical features, and the limit assembly includes:

[0062] The third slide groove 18 is provided in the protective shell 1 and communicated with the outside world. A second plug block 19 is slidably connected in the third slide groove 18, and one end of the second plug block 19 extends into the socket 17 and is plugged into the socket 17. A threaded rod 20 is threadedly connected to the second plug block 19, and the threaded rod 20 is located in the third slide groove 18 and is rotatably connected to the third slide groove 18. A rotating rod 21 is fixedly connected to one end of the threaded rod 20, and one end of the rotating rod 21 passes through the inner wall of the third slide groove 18 and extends to the outside world and is rotatably connected to the protective shell 1.

[0063] Among them, when the user needs to release the fixation of the extrusion block 16, the user rotates the rotating rod 21 by hand, so that the rotating rod 21 drives the threaded rod 20 to rotate in the third slide groove 18. When the threaded rod 20 rotates, one end of the second plug-in block 19 will be affected by the threads of the threaded rod 20 and move from the socket 17 to the outside. At this time, the fixation of the extrusion block 16 is released. When the user needs to fix the extrusion block 16, the user rotates the rotating rod 21 in the opposite direction by hand, so that the rotating rod 21 drives the threaded rod 20 to rotate in the opposite direction in the third slide groove 18. When the threaded rod 20 rotates in the opposite direction, one end of the second plug-in block 19 will be affected by the threads of the threaded rod 20 and inserted into the socket 17 from the outside. At this time, the extrusion block 16 is fixed to ensure that the extrusion block 16 will not be moved by the influence of the outside world.

[0064] Embodiment 6:

[0065] This embodiment provides a harmful gas monitoring device, which, in addition to the technical solutions of the above embodiments, also has the following technical features: one end of the rotating block 6 is rotatably connected to the mounting groove 2.

[0066] Here, it is ensured that one end of the rotating block 6 can rotate normally in the mounting groove 2 .

[0067] When in use, the user turns the rotating rod 21 by hand, so that the rotating rod 21 drives the threaded rod 20 to rotate in the third sliding groove 18. When the threaded rod 20 rotates, one end of the second plug block 19 is affected by the thread of the threaded rod 20 and moves from the insertion hole 17 to the outside. At this time, the fixation of the extrusion block 16 is released. Then the user presses the extrusion block 16 by hand, so that one end of the extrusion block 16 squeezes the extrusion groove 13, so that one end of the first plug block 12 enters the first sliding groove 11 from the cover plate 8, and the other end of the first plug block 12 compresses the reset spring 14. Then the user rotates the cover plate 8 by hand, so that the cover plate 8 drives The two rotating blocks 6 rotate in the two rotating grooves 5 respectively. When the two rotating blocks 6 rotate, the two rotating blocks 6 will respectively drive the two clockwork springs 7 to contract. At this time, the harmful gas monitoring device body 4 is completely exposed to the outside world. Then the user releases the hand pressing the squeezing block 16, allowing one end of the first plug-in block 12 to move from the first slide groove 11 to the slot 10 under the action of the rebound force of the first slide groove 11. At the same time, the squeezing block 16 will also reset. Then the user uses his hand to reversely rotate the rotating rod 21, allowing the rotating rod 21 to drive the threaded rod 20 to rotate in the opposite direction in the third slide groove 18. When the threaded rod 20 rotates in the opposite direction, the first One end of the second plug block 19 will be affected by the thread of the threaded rod 20 and inserted into the socket 17 from the outside. At this time, the extrusion block 16 is fixed to ensure that the extrusion block 16 will not be moved by the outside. Then the user can use the harmful gas monitoring device body 4. When the user accidentally drops it during use, the user's hand will release the restriction on the cover 8. At this time, the two rotating blocks 6 will be respectively affected by the elastic force of the two spring springs 7 to rotate in opposite directions, allowing the two rotating blocks 6 to drive the cover 8 to rotate in the installation slot 2, and insert one end of the cover 8 into the slot 10. When the cover When one end of 8 is inserted into the slot 10, the cover 8 will squeeze one end of the first plug block 12, allowing one end of the first plug block 12 to enter the first slide groove 11 from the slot 10 and allowing the other end of the first plug block 12 to compress the reset spring 14. When one end of the cover 8 is completely inserted into the slot 10, one end of the first plug block 12 will be inserted into the cover 8 under the action of the rebound force of the reset spring 14, fixing the cover 8 in the installation slot 2 and making it unable to move. When the entire device collides with the ground, the vibration generated by the impact will be absorbed by the silicone sleeve 3 and the silicone plate 9 to prevent the harmful gas monitoring equipment body 4 from being damaged.

[0068] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A harmful gas monitoring device, characterized in that: include: A protective shell (1) and a mounting groove (2), wherein the mounting groove (2) is provided in the protective shell (1) and communicates with the outside, a slot (10) is provided on the inner wall of the mounting groove (2), a silicone sleeve (3) is fixedly connected in the mounting groove (2), and a harmful gas monitoring device body (4) is fixedly connected in the silicone sleeve (3); Two rotating grooves (5), the two rotating grooves (5) are symmetrically arranged on the inner wall of the mounting groove (2), a rotating block (6) is rotatably connected in the rotating groove (5), and one end of the rotating block (6) penetrates the inner wall of the rotating groove (5) and extends into the mounting groove (2), a spring (7) is arranged on the rotating block (6), and one end of the spring (7) is fixed to the peripheral side of the rotating block (6), and the other end of the spring (7) is fixed to the inner wall of the rotating groove (5), a cover plate (8) is fixedly connected between the two rotating blocks (6), and one end of the cover plate (8) is located in the slot (10) and plugged into the slot (10), and a silicone plate (9) is fixedly connected to the bottom surface of the cover plate (8); A fixing component is located in the protective shell (1) and is used to fix the cover plate (8).

2. A harmful gas monitoring device according to claim 1, characterized in that: The fixing assembly comprises: A first slide groove (11), wherein the first slide groove (11) is provided on the inner wall of the slot (10), a first plug block (12) is slidably connected in the first slide groove (11), and one end of the first plug block (12) passes through one end of the cover plate (8) and extends into the cover plate (8) to be plugged and matched with the cover plate (8), an extrusion groove (13) is provided on the first plug block (12), and the other end of the first plug block (12) is fixedly connected to a return spring (14) fixed to the inner wall of the first slide groove (11); A second slide groove (15), wherein the second slide groove (15) is provided on the inner wall of the first slide groove (11) and is connected to the outside, an extrusion block (16) is slidably connected in the second slide groove (15), and one end of the extrusion block (16) is located in the extrusion groove (13), and an insertion hole (17) is provided on the extrusion block (16); A limiting component is located in the protective shell (1) and is used to fix the extrusion block (16).

3. A harmful gas monitoring device according to claim 2, characterized in that: One end of the extrusion block (16) is plugged into and matched with the extrusion groove (13), and one end of the extrusion block (16) is arranged at an angle.

4. A harmful gas monitoring device according to claim 2, characterized in that: One end of the first insert block (12) is arranged in an inclined manner.

5. A harmful gas monitoring device according to claim 2, characterized in that: The limiting component comprises: A third slide groove (18), wherein the third slide groove (18) is provided in the protective shell (1) and is in communication with the outside, a second plug block (19) is slidably connected in the third slide groove (18), and one end of the second plug block (19) extends into the insertion hole (17) and is plugged into the insertion hole (17), a threaded rod (20) is connected to the inner thread of the second plug block (19), and the threaded rod (20) is located in the third slide groove (18) and is rotatably connected to the third slide groove (18), one end of the threaded rod (20) is fixedly connected to a rotating rod (21), and one end of the rotating rod (21) passes through the inner wall of the third slide groove (18) and extends to the outside to be rotatably connected to the protective shell (1).

6. A harmful gas monitoring device according to claim 1, characterized in that: One end of the rotating block (6) is rotatably connected to the mounting groove (2).

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