Underground bin and fuel gas detection equipment

Abstract

The utility model relates to the technical field of fuel gas detection, and discloses a buried bin and fuel gas detection equipment, the buried bin comprises a shell, one end of the shell is provided with an opening, the shell is provided with a containing cavity, and the shell is provided with a ventilation hole; the upper cover is provided with a detection hole; the lining plate is detachably connected with the outer wall of the shell; the buried bin has a first state and a second state, and when the buried bin is in the first state, the lining plate is relatively separated from the outer wall of the shell; when the underground bin is in the second state, the lining plate is connected with the outer wall of the shell, the outer edge of the lining plate protrudes out of the outer wall of the shell, and the plane where the lining plate is located is perpendicular to the first direction. The underground bin can be suitable for a hard road surface and a green road surface at the same time, and on the premise that the installation cost is saved, the installation stability of the underground bin can be guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of gas detection, in particular to an underground warehouse and gas detection equipment. Background Art

[0002] Most of the city gas is supplied by gas pipeline transmission. With the ever-expanding city gas pipeline network, the ground styles of the gas pipeline routes have also become diversified, such as asphalt roads, marble roads, square bricks and other hardened roads, lawns, flower beds and other green roads. Due to the different characteristics of different road surfaces, the types of buried warehouses used in conjunction with combustible gas monitors are also different.

[0003] In addition, in the prior art, when setting up underground warehouses on hard pavement, large tools are usually required to break up the hard pavement over a large area, which not only makes it difficult to restore the pavement, but also consumes too much manpower and material resources. When setting up underground warehouses on green pavement, due to the soft texture of the green pavement, the underground warehouses are prone to sinking and tilting after installation, and have poor stability.

[0004] Therefore, how to set up an underground storage bin that can be used on both hard roads and green roads, while saving installation costs and ensuring the stability of the underground storage bin installation, has become a technical problem that needs to be solved urgently in this field. Utility Model Content

[0005] The purpose of the utility model is to at least solve the problem of how to set up an underground storage that can be applied to both hard roads and green roads, while saving installation costs and ensuring the stability of the underground storage installation. This purpose is achieved through the following technical solutions:

[0006] In the first aspect, the utility model proposes an underground bin, which includes: a shell extending along a first direction, the shell being a cylindrical structure, an opening being provided at one end of the shell, the shell having a accommodating cavity for accommodating a combustible gas detector, and the shell being provided with a ventilation hole connected to the accommodating cavity; an upper cover for sealing the opening, the upper cover being provided with a detection hole connected to the accommodating cavity; and a lining plate detachably connected to the outer wall of the shell; the underground bin has a first state and a second state, when the underground bin is in the first state, the lining plate is relatively separated from the outer wall of the shell; when the underground bin is in the second state, the lining plate is connected to the outer wall of the shell, the outer edge of the lining plate protrudes from the outer wall of the shell, and the plane where the lining plate is located is perpendicular to the first direction.

[0007] When this underground bin is used on a hard road surface, the underground bin is first switched to the first state, that is, the lining plate is not connected to the outer wall of the shell; when pre-buried, a vertical installation hole can be drilled longitudinally in the hard road surface with a water drill or other equipment, and fine stones are placed at the bottom of the installation hole. After compacting it with tools, the shell of the combustible gas detector is placed into the installation hole; the shell with a cylindrical structure does not need to cause large-scale damage to the hard road surface, saving manpower and material resources and effectively saving installation costs. When it is used for greening pavement (i.e. soft pavement), the underground bin is switched to the second state, i.e. the outer edge of the lining plate protrudes from the outer wall of the shell, and the plane where the lining plate is located is perpendicular to the first direction; when pre-buried, a pre-buried pit is dug out with a shovel or other tool, and the underground bin is buried in the pre-buried pit, ensuring that the plane where the lining plate is located is parallel to the horizontal direction (i.e. the plane where the lining plate is located is perpendicular to the extension direction of the installation hole), and finally the pre-buried pit is backfilled; the setting of the lining plate can prevent the underground bin from settling or tilting after installation, thereby ensuring the stability of the underground bin installation.

[0008] In some embodiments of the present invention, the shell includes a first portion and a second portion connected to each other, and the first portion and the second portion are arranged along a first direction.

[0009] In some embodiments of the present invention, the outer wall of the second part is provided with supporting ribs, and the outer diameter of the second part is greater than the outer diameter of the first part.

[0010] In some embodiments of the present invention, the outer wall of the first part is provided with supporting ribs, the outer diameter of the first part is greater than the outer diameter of the second part, and the ventilation hole is provided in the second part.

[0011] In some embodiments of the utility model, the outer wall of the shell has a slot, which is circumferentially arranged around the outer wall of the shell and is located between the first part and the second part along the first direction. The slot is used to engage with the liner.

[0012] In some embodiments of the utility model, the lining plate includes: a first plate, which is clamped in the slot; and a second plate, which is clamped in the slot, the first plate and the second plate are arranged at intervals along the first direction, and the first plate and the second plate are detachably connected by a connecting mechanism.

[0013] In some embodiments of the present utility model, a first clamping piece is provided at the opening, and a second clamping piece is provided at the upper cover, and the first clamping piece is clamped and matched with the second clamping piece.

[0014] In some embodiments of the present invention, the upper cover is detachably connected to the housing by screws.

[0015] In some embodiments of the utility model, a mounting groove is provided on a surface of the upper cover facing away from the accommodating cavity, and the mounting groove is used to install a signboard.

[0016] In a second aspect, the utility model proposes a gas detection device, which includes a combustible gas detector and any one of the above-mentioned underground bins, and the combustible gas detector is installed in a receiving cavity of the underground bin.

[0017] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not to be considered as limiting the present invention. Moreover, the same reference numerals are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0019] Figure 1 A schematic structural diagram of the underground bin provided by the embodiment of the utility model when it is in a first state;

[0020] Figure 2 A schematic diagram of the structure of the underground bin provided by the embodiment of the utility model when it is in the second state;

[0021] Figure 3 A schematic diagram of a portion of the structure of the shell of the underground warehouse provided in an embodiment of the utility model;

[0022] Figure 4 A schematic diagram of the structure of the upper cover of the underground warehouse provided in an embodiment of the utility model;

[0023] Figure 5 A schematic diagram of the partial structure of the upper cover of the underground warehouse provided in an embodiment of the utility model.

[0024] The reference numerals are as follows:

[0025] 10. Underground warehouse;

[0026] 1. Shell; 11. Accommodating cavity; 111. Opening; 1111. First clamping member; 12. Ventilation hole; 13. First part; 14. Second part; 15. Support rib; 16. Slot;

[0027] 2. Upper cover; 21. Detection hole; 22. Second clamping member; 23. Screw hole; 24. Mounting groove; 241. Annular groove;

[0028] 3. Lining plate; 31. First plate; 311. First threaded hole; 32. Second plate. DETAILED DESCRIPTION

[0029] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0030] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0031] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0032] For ease of description, spatial relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is turned over, then the elements described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." can include both upper and lower orientations. The device can be oriented otherwise (rotated 90 degrees or in other directions) and the spatial relative descriptors used in the text are interpreted accordingly.

[0033] Figure 1 A schematic structural diagram of the underground bin provided by the embodiment of the utility model when it is in a first state; Figure 2 A schematic diagram of the structure of the underground bin provided by the embodiment of the utility model when it is in the second state; Figure 3 A schematic diagram of a portion of the structure of the shell of the underground warehouse provided in an embodiment of the utility model; Figure 4 A schematic diagram of the structure of the upper cover of the underground warehouse provided in an embodiment of the utility model; Figure 5 A partial structural diagram of the upper cover of the underground warehouse provided by the embodiment of the utility model; Figures 1 to 5 The embodiment of the utility model provides an underground bin 10, which includes: a shell 1, which extends along a first direction, and the shell 1 is a cylindrical structure. One end of the shell 1 is provided with an opening 111, and the shell 1 has a housing cavity 11 for accommodating a combustible gas detector. The shell 1 is provided with a ventilation hole 12 connected to the housing cavity 11; an upper cover 2, which is used to block the opening 111, and the upper cover 2 is provided with a detection hole 21 connected to the housing cavity 11; and a lining plate 3, which is detachably connected to the outer wall of the shell 1; the underground bin 10 has a first state and a second state. When the underground bin 10 is in the first state, the lining plate 3 is relatively separated from the outer wall of the shell 1; when the underground bin 10 is in the second state, the lining plate 3 is connected to the outer wall of the shell 1, and the outer edge of the lining plate 3 protrudes from the outer wall of the shell 1, and the plane where the lining plate 3 is located is perpendicular to the first direction.

[0034] Among them, the shell 1 can be a cylindrical structure, and accordingly, the upper cover 2 should be a circular cover plate; this is only for example explanation, and the specific shape of the underground bin 10 can be determined according to the actual working conditions and is not limited.

[0035] In addition, since the underground storage bin 10 needs to be buried underground for a long time, its overall material can be selected from corrosion-resistant engineering plastics, such as polyphenylene sulfide (PPS). PPS plastic has good corrosion resistance and high temperature resistance, and has good dimensional stability. Similarly, this is only an example, and the specific material of the underground storage bin 10 can be determined according to the actual working conditions and is not limited.

[0036] In this embodiment, when the underground bin 10 is used on a hard road surface, the underground bin 10 is first switched to the first state, that is, the lining plate 3 is not connected to the outer wall of the shell 1; when pre-buried, a vertical installation hole can be drilled longitudinally in the hard road surface with a water drill or other equipment, and fine sand and gravel are laid at the bottom of the installation hole. After compacting with tools, the shell 1 with the combustible gas detector is placed in the installation hole, so that the shell 1 is in contact with the fine sand and gravel; the cylindrical structure of the shell 1 does not need to cause large-scale damage to the hard road surface, saving manpower and material resources, and effectively saving installation costs.

[0037] Among them, fine sand and gravel are laid at the bottom of the installation hole to prevent the underground bin 10 from sinking when the underground bin 10 in the first state is installed. Metal grates can be set on the fine sand and gravel according to actual needs to further support the underground bin 10, thereby effectively improving the stability of the underground bin 10 in the first state relative to the road surface, so as to further prevent the underground bin 10 in the first state from sinking in the installation hole.

[0038] In addition, the depth of the installation hole can be determined according to the length of the underground bin 10 along the first direction. Generally, the depth of the installation hole is ensured to be more than 20 mm longer than the length of the underground bin 10 along the first direction. For ease of installation, the inner diameter of the installation hole should be slightly larger than the outer diameter of the shell 1. For example, the diameter of the installation hole can be 1 mm to 2 mm larger than the outer diameter of the shell 1. The dimensions in this embodiment are only for illustration and should be based on actual working conditions without specific limitation.

[0039] When the buried bin 10 is used for greening the pavement (i.e., soft pavement), the buried bin 10 is switched to the second state, i.e., the outer edge of the lining 3 protrudes from the outer wall of the shell 1, and the plane where the lining 3 is located is perpendicular to the first direction; when pre-buried, a pre-buried pit is dug out with a shovel or other tool, and the buried bin 10 is buried in the pre-buried pit, ensuring that the plane where the lining 3 is located is parallel to the horizontal direction (i.e., the plane where the lining 3 is located is perpendicular to the extension direction of the installation hole), and finally the pre-buried pit is backfilled; the setting of the lining 3 can prevent the buried bin 10 from settling or tilting after installation, thereby ensuring the stability of the installation of the buried bin 10.

[0040] It should be noted that no matter what kind of road surface the underground bin 10 is applied to, the pre-buried position of the underground bin 10 should be above the corresponding gas pipeline under the road surface; since the outer wall of the shell 1 is provided with a ventilation hole 12 connected to the accommodating cavity 11, if the gas pipeline leaks, the combustible gas detector located in the accommodating cavity 11 can detect it in time; and the staff can also extend the detection instrument into the detection hole 21 on the upper cover 2 for detection, so as to more accurately determine whether the gas pipeline is leaking.

[0041] Moreover, in order to improve the accuracy and convenience of detection, multiple ventilation holes 12 and detection holes 21 can be set, and multiple ventilation holes 12 can be evenly distributed on the side wall of the shell 1, and multiple detection holes 21 can be evenly spaced around the circumference of the upper cover 2.

[0042] Therefore, the underground bin 10 provided in this embodiment can be applied to both hard roads and green roads (i.e., soft roads), and can also ensure the stability of the installation of the underground bin 10 while saving installation costs.

[0043] refer to Figure 1 and Figure 2 According to an optional embodiment of the present utility model, the housing 1 includes a first portion 13 and a second portion 14 connected to each other, and the first portion 13 and the second portion 14 are arranged along a first direction.

[0044] Specifically, a support rib 15 may be provided on the outer wall of the second portion 14 , and the outer diameter of the second portion 14 is greater than the outer diameter of the first portion 13 .

[0045] Under this setting, when the underground bin 10 is used on a hard road surface, after the installation hole is drilled, the underground bin 10 in the first state is inserted into the installation hole along its own length direction, so that the second part 14 abuts against the side wall of the installation hole, thereby allowing the underground bin 10 to be stably installed in the installation hole.

[0046] Or, preferably, Figure 1 and Figure 2 As shown, according to an optional embodiment of the present invention, a support rib 15 is provided on the outer wall of the first part 13 , the outer diameter of the first part 13 is greater than the outer diameter of the second part 14 , and the ventilation hole 12 is provided in the second part 14 .

[0047] In this embodiment, when the underground bin 10 is used on a hard road surface, after the installation hole is drilled, the underground bin 10 in the first state is inserted into the installation hole along its own length direction, so that the first part 13 abuts against the side wall of the installation hole; since the ventilation hole 12 is provided on the outer wall of the second part 14, and the outer diameter of the second part 14 is smaller than the outer diameter of the first part 13, it means that there is a gap between the second part 14 and the inner wall of the installation hole, and since the ventilation hole 12 is connected with the accommodating cavity 11, if the gas pipeline leaks, the leaked gas can easily flow into the accommodating cavity 11, so as to be detected by the combustible gas detector located in the accommodating cavity 11.

[0048] Therefore, this arrangement ensures that the underground bin 10 can be stably installed while also ensuring the working efficiency of the combustible gas detector; and the arrangement in which the outer diameter of the first part 13 is larger than the outer diameter of the second part 14 makes it more convenient to operate when the underground bin 10 is inserted into the installation hole.

[0049] Among them, there can be multiple support ribs 15. Taking the arrangement of support ribs 15 on the outer wall of the first part 13 as an example, each support rib 15 can extend along the first direction, and multiple support ribs 15 are evenly spaced around the circumference of the outer wall of the first part 13; in this way, while improving the overall strength of the underground bin 10, it can also make the first part 13 (that is, the part that is tightly fitted with the inner wall of the installation hole) of the underground bin 10 when inserted into the installation hole. Even force is applied to it, further ensuring the installation stability of the underground bin 10.

[0050] refer to Figures 1 to 3 According to an optional embodiment of the utility model, the outer wall of the shell 1 has a card slot 16, the card slot 16 is circumferentially arranged around the outer wall of the shell 1, and along the first direction, the card slot 16 is located between the first part 13 and the second part 14, and the card slot 16 is used to engage with the liner 3.

[0051] In this embodiment, when the underground bin 10 is used for greening the road surface (i.e., soft road surface), the underground bin 10 needs to be switched to the second state. At this time, the lining plate 3 is inserted into the slot 16 of the outer wall of the shell 1, so that the outer edge of the lining plate 3 protrudes from the outer wall of the shell 1, and the plane where the lining plate 3 is located is perpendicular to the first direction.

[0052] Among them, the lining plate 3 can be a structure with a card interface in the middle. During installation, the lining plate 3 is entirely sleeved on the outer wall of the shell 1 so that the card interface and the card slot 16 are card-engaged. In addition, a sealing ring can be provided at the card interface or the card slot 16 to increase friction and thus ensure the stability of the card connection.

[0053] like Figure 2As shown, according to an optional embodiment of the utility model, the lining plate 3 includes: a first plate 31, which is clamped in the slot 16; and a second plate 32, which is clamped in the slot 16, the first plate 31 and the second plate 32 are arranged at intervals along the first direction, and the first plate 31 and the second plate 32 are detachably connected by a connecting mechanism.

[0054] In this embodiment, when the underground bin 10 is used for greening the pavement (i.e., soft pavement), it is necessary to switch the underground bin 10 to the second state. At this time, the first plate 31 and the second plate 32 are respectively inserted into the slot 16. This process should ensure that the first plate 31 and the second plate 32 are arranged at intervals along the first direction. After the first plate 31 and the second plate 32 are both inserted into the slot 16, the first plate 31 and the second plate 32 are connected by a connecting mechanism, thereby realizing the assembly of the lining plate 3 and the shell 1.

[0055] Among them, continue to refer to Figure 2 The connecting mechanism may be a screw, a first threaded hole 311 may be provided on the first plate 31, and a second threaded hole (not shown in the figure) corresponding to the first threaded hole 311 may be provided on the second plate 32, and the lining plate 3 is assembled by sequentially passing the screws through the first threaded hole 311 and the second threaded hole and tightening them; in addition, there may be multiple screws to improve the stability of the connection; it is easy to understand that the number of the first threaded hole 311 and the second threaded hole should be set in a one-to-one correspondence with the number of the screws.

[0056] refer to Figure 3 and Figure 5 According to an optional embodiment of the present utility model, a first clamping member 1111 is provided at the opening 111 , and a second clamping member 22 is provided at the upper cover 2 , and the first clamping member 1111 is clamped and matched with the second clamping member 22 .

[0057] It is easy to understand that the combustible gas detector needs to be placed into the accommodating cavity 11 through the opening 111 , and when the combustible gas detector is placed, the upper cover 2 needs to block the opening 111 .

[0058] Therefore, in this embodiment, the detachable connection between the upper cover 2 and the opening 111 is achieved by the snap-fitting cooperation between the first snap-fitting member 1111 and the second snap-fitting member 22 . The snap-fitting method is simple and convenient to operate and easy to assemble and disassemble.

[0059] Specifically, the first clamping member 1111 may be a fixed clamping member, and the second clamping member 22 may be a rotating clamping member, and the two are engaged with each other by screwing and clamping, thereby realizing the opening and blocking of the opening 111 .

[0060] According to a possible embodiment of the present invention, the upper cover 2 is detachably connected to the housing 1 by screws.

[0061] In this embodiment, reference Figure 4 and Figure 5, screw holes 23 can be set on the upper cover 2, and the upper cover 2 and the shell 1 can be detachably connected by screw connection; to further improve the stability of the upper cover 2 relative to the shell 1. The screw connection method is reliable and easy to disassemble and assemble, ensuring the disassembly and assembly efficiency of the underground warehouse 10. Similarly, there can be multiple screws to improve the stability of the connection; it is easy to understand that the number of screw holes 23 and should be set in a one-to-one correspondence with the number of screws.

[0062] Continue to refer Figure 4 and Figure 5 According to an optional embodiment of the present utility model, a mounting groove 24 is provided on the surface of the upper cover 2 facing away from the accommodating cavity 11, and the mounting groove 24 is used to install the signboard.

[0063] In this embodiment, specifically, the mounting groove 24 can be set at the center of the surface of the upper cover 2 away from the accommodating cavity 11. For example, the mounting groove 24 can include a plurality of concentric annular grooves 241, and each annular groove 241 is provided with a rubber strip to enable the sign to be stably adhered to the upper cover 2.

[0064] In addition, a warning sign may be provided on the surface of the upper cover 2 facing away from the accommodating cavity 11. The warning sign may be installed on the upper cover 2 by bonding, or may be directly formed integrally with the upper cover 2 when the upper cover 2 is manufactured. The specific designation may depend on actual needs and is not limited.

[0065] The embodiment of the utility model further provides a gas detection device, which includes a combustible gas detector and any one of the above-mentioned underground bins 10 . The combustible gas detector is installed in the accommodating cavity 11 of the underground bin 10 .

[0066] In this embodiment, the beneficial effects of the gas detection equipment are the same as those of any of the above-mentioned underground bins 10, and both are applicable to both hard roads and green roads (i.e., soft roads), and can ensure the stability of the installation of the underground bin 10 while saving installation costs, which will not be repeated here.

[0067] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. An underground warehouse, characterized in that: include: A shell extending in a first direction, the shell being a cylindrical structure, one end of the shell being provided with an opening, the shell having a receiving cavity for receiving a combustible gas detector, and the shell being provided with a ventilation hole communicating with the receiving cavity; An upper cover, used to block the opening, the upper cover being provided with a detection hole communicating with the accommodating cavity; as well as A lining plate is detachably connected to the outer wall of the shell; the underground bin has a first state and a second state. When the underground bin is in the first state, the lining plate is relatively separated from the outer wall of the shell; when the underground bin is in the second state, the lining plate is connected to the outer wall of the shell, the outer edge of the lining plate protrudes from the outer wall of the shell, and the plane where the lining plate is located is perpendicular to the first direction.

2. The underground warehouse according to claim 1, characterized in that: The housing includes a first portion and a second portion connected to each other, and the first portion and the second portion are arranged along the first direction.

3. The underground warehouse according to claim 2, characterized in that: The outer wall of the second part is provided with supporting ribs, and the outer diameter of the second part is greater than the outer diameter of the first part.

4. The underground warehouse according to claim 2, characterized in that: The outer wall of the first part is provided with supporting ribs, the outer diameter of the first part is greater than the outer diameter of the second part, and the ventilation hole is arranged in the second part.

5. The underground warehouse according to claim 2, characterized in that: The outer wall of the shell has a card slot, which is circumferentially arranged around the outer wall of the shell and is located between the first part and the second part along the first direction. The card slot is used for card-engaging with the lining plate.

6. The underground warehouse according to claim 5, characterized in that: The lining plate comprises: A first plate, snapped into the slot; and The second plate is clamped in the clamping slot, the first plate and the second plate are arranged at intervals along the first direction, and the first plate and the second plate are detachably connected via a connecting mechanism.

7. The underground warehouse according to any one of claims 1 to 6, characterized in that: The opening is provided with a first clamping piece, the upper cover is provided with a second clamping piece, and the first clamping piece is clamped and matched with the second clamping piece.

8. The underground warehouse according to any one of claims 1 to 6, characterized in that: The upper cover is detachably connected to the shell by screws.

9. The underground warehouse according to any one of claims 1 to 6, characterized in that: A mounting groove is provided on a surface of the upper cover facing away from the accommodating cavity, and the mounting groove is used for mounting a signboard.

10. A gas detection device, characterized in that: It comprises a combustible gas detector and the underground warehouse as described in any one of claims 1 to 9, wherein the combustible gas detector is installed in the accommodating cavity of the underground warehouse.

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