Explosion-proof gas detection device

Abstract

The utility model discloses an explosion-proof type gas detection device, and solves the technical problems that electric sparks are possibly generated when devices in an existing gas detector break down, and the electric sparks possibly ignite combustible gas in an external field through a gas channel on the gas detector. The explosion-proof gas detection device comprises an explosion-proof base, an explosion-proof shell arranged on the explosion-proof base and a gas detection mechanism arranged in the explosion-proof shell. The device is simple in structure, scientific and reasonable in design and convenient to use, related devices participating in gas detection are installed in different areas, the devices installed in different areas are isolated from one another, and it is avoided that heat is accumulated in the same area to affect operation of the devices; the opening and closing mechanism is arranged to open and close the gas inlet, when devices in the explosion-proof shell break down, the opening and closing mechanism is utilized to seal the gas inlet, and the heat insulation valve on the flame-retardant gas outlet pipe is closed, so that the internal space of the explosion-proof shell is isolated from external gas, and therefore, the failure devices can be prevented from generating electric sparks to ignite the external gas.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas detection, and in particular relates to an explosion-proof gas detection device. Background Art

[0002] Gas leaks in locations where the leaked gas is toxic, harmful, or flammable can pose a high risk. Toxic and harmful gases can harm people, while flammable gases can explode and combust under the influence of high temperatures, static electricity, or open flames, potentially causing casualties and significant economic losses. A gas detector can detect gas leaks within a location, as well as the type and concentration of the leaked gas. Based on the gas detector's detection results, personnel can be evacuated in advance and appropriate measures can be taken to prevent further leakage and spread, minimizing casualties and economic losses. Gas detectors require a gas channel connected to the outside world to detect gas. Technical issues include: A malfunction in a gas detector's internal components can generate sparks, which can ignite flammable gas within the channel and, in turn, ignite leaked flammable gas outside. Some gas detectors also have components installed in the same area, generating significant heat. The accumulated heat from multiple components can affect their operation, thus distorting the detection results. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an explosion-proof gas detection device to solve the technical problem that when a device in the existing gas detector fails, electric sparks may be generated, and the electric sparks may ignite combustible gas in the external field through the gas channel on the gas detector.

[0004] In order to achieve the above purpose, the technical solution adopted by the present utility model is as follows:

[0005] An explosion-proof gas detection device comprises an explosion-proof base, an explosion-proof shell arranged on the explosion-proof base, and a gas detection mechanism arranged in the explosion-proof shell; the gas detection mechanism comprises an air inlet opened at the top of the explosion-proof shell and communicating with the outside world, an air flow channel opened in the interior of the explosion-proof shell and communicating with the air inlet, a plurality of gas sensors arranged in the air flow channel, an air pump arranged in the air flow channel and communicating with the air flow channel and the outside world, and an opening and closing mechanism arranged on the explosion-proof shell for opening and closing the air inlet.

[0006] Furthermore, the air inlet includes a first flared opening, a narrow opening and a second flared opening opened on the top of the explosion-proof shell. The first flared opening is connected to the outside, the second flared opening is connected to the air flow channel, and the narrow opening is connected between the first flared opening and the second flared opening.

[0007] Furthermore, the opening and closing mechanism includes two sealing and heat-insulating blocks that are adapted to each other and respectively located in the narrow openings, and two linear motors that are provided on the explosion-proof shell and are respectively connected to the two sealing and heat-insulating blocks in a one-to-one correspondence.

[0008] Furthermore, the air flow channel includes an explosion-proof cavity opened in the explosion-proof shell and connected to the second expansion port, a gas detection cavity connected to the explosion-proof cavity, and a first installation cavity connected to the gas detection cavity; the gas sensor is located in the gas detection cavity, and the air pump is located in the first installation cavity.

[0009] Furthermore, a first explosion-proof panel and a second explosion-proof panel are provided in the explosion-proof cavity. A first vent hole communicating with the explosion-proof cavity is respectively opened on the first explosion-proof panel and the second explosion-proof panel. A fireproof net is pressed between the first explosion-proof panel and the second explosion-proof panel.

[0010] Furthermore, a mounting base is fixedly embedded in the explosion-proof shell, the gas sensor is installed on the top of the mounting base, a threaded connection cylinder is provided on the top of the mounting base and is located in the explosion-proof cavity, a threaded rod is threadedly connected in the threaded connection cylinder, and a second explosion-proof plate is provided on the top of the threaded rod.

[0011] Furthermore, the vacuum pump is provided with an air inlet pipe connected to the air flow channel and a flame retardant air outlet pipe connected to the outside, and the flame retardant air outlet pipe is provided with a heat insulation valve.

[0012] Furthermore, a first closed cavity and a second closed cavity are provided on the explosion-proof shell, and the gas detection mechanism also includes a single-chip microcomputer and a rechargeable battery arranged in the first closed cavity, and a liquid crystal touch screen arranged in the second closed cavity; the opening and closing mechanism, gas sensor, vacuum pump, rechargeable battery and liquid crystal touch screen are respectively connected to the single-chip microcomputer.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The utility model has a simple structure, a scientific and reasonable design, and is easy to use. The utility model installs the relevant devices involved in gas detection in different areas, that is, the gas sensor and the air pump are installed in the air flow channel, the single-chip computer and the rechargeable battery are installed in the first closed cavity, and the liquid crystal touch screen is installed in the second closed cavity. The devices installed in different areas are isolated from each other, which avoids heat accumulation in the same area and affecting the operation of the devices; the utility model is provided with an opening and closing mechanism to open and close the air inlet. When a device in the explosion-proof shell fails, the opening and closing mechanism is used to seal the air inlet, and the insulation valve on the flame-retardant outlet pipe is closed to isolate the internal space of the explosion-proof shell from the outside gas. In this way, it can avoid the faulty device generating electric sparks to ignite the outside gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the utility model.

[0016] Figure 2 This is a schematic diagram of the explosion-proof housing 5 when no gas detection mechanism is installed.

[0017] Figure 3 Schematic diagram of the gas sensors distributed in the gas detection chamber.

[0018] Figure 4 This is a schematic diagram of two linear motors driving two sealing and heat-insulating blocks to fit together.

[0019] Figure 5 This is a schematic diagram of the appearance of the utility model.

[0020] The names corresponding to the reference numerals are:

[0021] 1- explosion-proof base, 2- first flare, 3- narrow mouth, 4- second flare, 5- explosion-proof shell, 6- gas sensor, 7- vacuum pump, 8- air inlet, 9- sealing and heat insulation block, 10- linear motor, 11- explosion-proof cavity, 12- gas detection cavity, 13- first installation cavity, 14- first explosion-proof plate, 15- first vent, 16- fireproof net, 17- second explosion-proof plate, 18- mounting seat, 19- threaded connection cylinder, 20- threaded rod, 2 1-inlet pipe, 22-flame retardant outlet pipe, 23-insulated valve, 24-first closed cavity, 25-second closed cavity, 26-single chip microcomputer, 27-rechargeable battery, 28-LCD touch screen, 29-second installation cavity, 30 cover, 31-first give way through hole, 32-second vent hole, 33-third vent hole, 34-first explosion-proof mounting seat, 35-explosion-proof connecting seat, 36-second explosion-proof mounting seat, 37-threaded column, 38-mounting through hole. DETAILED DESCRIPTION

[0022] To make the purpose, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings. It is apparent that the embodiments described herein are merely a portion of the embodiments of the present invention, and not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0023] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; of course, they can also refer to mechanical connections or electrical connections; in addition, they can also refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0025] Example 1

[0026] like Figure 1-5 As shown, the utility model provides an explosion-proof gas detection device, including an explosion-proof base 1, an explosion-proof shell 5 arranged on the explosion-proof base 1, and a gas detection mechanism arranged in the explosion-proof shell 5; the gas detection mechanism includes an air inlet 8 opened at the top of the explosion-proof shell 5 and communicating with the outside world, an air flow channel opened in the interior of the explosion-proof shell 5 and communicating with the air inlet 8, a number of gas sensors 6 arranged in the air flow channel, an air pump 7 arranged in the air flow channel and connected with the air flow channel and the outside world, and an opening and closing mechanism arranged on the explosion-proof shell 5 for opening and closing the air inlet 8.

[0027] The utility model has a simple structure, a scientific and reasonable design, and is easy to use. The utility model installs the relevant devices involved in gas detection in different areas, that is, the gas sensor and the air pump are installed in the air flow channel, the single-chip computer and the rechargeable battery are installed in the first closed cavity, and the liquid crystal touch screen is installed in the second closed cavity. The devices installed in different areas are isolated from each other, which avoids heat accumulation in the same area and affecting the operation of the devices; the utility model is provided with an opening and closing mechanism to open and close the air inlet. When a device in the explosion-proof shell fails, the opening and closing mechanism is used to seal the air inlet, and the insulation valve on the flame-retardant outlet pipe is closed to isolate the internal space of the explosion-proof shell from the outside gas. In this way, it can avoid the faulty device generating electric sparks to ignite the outside gas.

[0028] The utility model provides an explosion-proof chamber in the air flow channel, and provides a first explosion-proof plate, a second explosion-proof plate and a fireproof net in the explosion-proof chamber, and provides a narrow opening at the air inlet. In this way, when combustion or explosion of combustible gas occurs in the outside, the narrow opening can reduce the entry of external flying objects into the explosion-proof chamber, and the first explosion-proof plate and the second explosion-proof plate in the explosion-proof chamber can block the flying objects or impact dust entering the explosion-proof chamber. In addition, the inner wall of the explosion-proof chamber, the first explosion-proof plate and the second explosion-proof plate can buffer the shock wave generated by the explosion. At the same time, the fireproof net can block the flame that enters the explosion-proof chamber through the narrow opening from continuing to spread, thereby protecting the devices in the explosion-proof shell from the influence of the external explosion. When a device inside the explosion-proof shell fails, generating electric sparks and igniting combustible gases in the air flow channel, the first explosion-proof plate, the second explosion-proof plate and the fireproof net in the explosion-proof cavity can isolate the flame generated in the explosion-proof shell from the outside world. At the same time, the sealing and heat-insulating block on the opening and closing mechanism seals the air inlet and the heat-insulating valve on the flame-retardant outlet pipe is closed synchronously, blocking the connection between the inside of the explosion-proof shell and the outside gas, preventing the flame and high temperature inside the explosion-proof shell from leaking out, thereby avoiding the outside gas from being ignited.

[0029] Example 2

[0030] like Figure 1-5 As shown, the utility model provides an explosion-proof gas detection device, including an explosion-proof base 1, an explosion-proof shell 5 arranged on the explosion-proof base 1, and a gas detection mechanism arranged in the explosion-proof shell 5; the gas detection mechanism includes an air inlet 8 opened at the top of the explosion-proof shell 5 and communicating with the outside world, an air flow channel opened in the interior of the explosion-proof shell 5 and communicating with the air inlet 8, a number of gas sensors 6 arranged in the air flow channel, an air pump 7 arranged in the air flow channel and connected with the air flow channel and the outside world, and an opening and closing mechanism arranged on the explosion-proof shell 5 for opening and closing the air inlet 8.

[0031] The air inlet 8 includes a first flared opening 2, a narrow opening 3 and a second flared opening 4 opened on the top of the explosion-proof shell 5. The first flared opening 2 is connected to the outside, the second flared opening 4 is connected to the air flow channel, and the narrow opening 3 is connected between the first flared opening 2 and the second flared opening 4.

[0032] In this embodiment 2, when gas detection is performed, the outside gas enters the narrow opening 3 through the first expansion opening 2, and then enters the air flow channel through the narrow opening 3 and the second expansion opening 4. In the process of the outside gas entering the narrow opening 3 from the first expansion opening 2, the flow rate is accelerated. In this way, the gas content entering the explosion-proof shell 5 per unit time can be increased. In the process of the outside gas entering the second expansion opening 4 from the narrow opening 3, the flow rate is slowed down. In this way, in the explosion-proof cavity 11, the outside gas is discharged from the second expansion opening 4 and distributed above the first explosion-proof plate 14. Then, it is evenly dispersed above the first explosion-proof plate 14. The outside gas is evenly diverted from above the first explosion-proof plate 14 through the first vent holes 15 on the first explosion-proof plate 14 and the second explosion-proof plate 17 to the bottom of the second explosion-proof plate 17, and then evenly diverted circumferentially from the bottom of the second explosion-proof plate 17 to the gas detection cavity 12, so that the gas sensor 6 circumferentially distributed in the gas detection cavity 12 can detect the gas.

[0033] Example 3

[0034] like Figure 1-5 As shown, the utility model provides an explosion-proof gas detection device, including an explosion-proof base 1, an explosion-proof shell 5 arranged on the explosion-proof base 1, and a gas detection mechanism arranged in the explosion-proof shell 5; the gas detection mechanism includes an air inlet 8 opened at the top of the explosion-proof shell 5 and communicating with the outside world, an air flow channel opened in the interior of the explosion-proof shell 5 and communicating with the air inlet 8, a number of gas sensors 6 arranged in the air flow channel, an air pump 7 arranged in the air flow channel and connected with the air flow channel and the outside world, and an opening and closing mechanism arranged on the explosion-proof shell 5 for opening and closing the air inlet 8.

[0035] The air inlet 8 includes a first flared opening 2, a narrow opening 3 and a second flared opening 4 opened on the top of the explosion-proof shell 5. The first flared opening 2 is connected to the outside, the second flared opening 4 is connected to the air flow channel, and the narrow opening 3 is connected between the first flared opening 2 and the second flared opening 4.

[0036] The opening and closing mechanism includes two sealing and heat-insulating blocks 9 that are adapted to each other and respectively located in the narrow opening 3 , and two linear motors 10 that are provided on the explosion-proof shell 5 and respectively connected to the two sealing and heat-insulating blocks 9 in a one-to-one correspondence.

[0037] In this embodiment 3, the linear motor 10 is sealed on the explosion-proof shell 5. When the two linear motors 10 drive the two sealed heat-insulating blocks 9 to seal each other, the air inlet 8 channel is closed. When the two linear motors 10 drive the two sealed heat-insulating blocks 9 to move away from each other, the air inlet 8 channel is opened.

[0038] The explosion-proof housing 5 defines a second mounting cavity 29, which is sealed with a cover plate 30. The linear motor 10 is mounted in the second mounting cavity 29. The explosion-proof housing 5 defines a first clearance hole 31 communicating with the second mounting cavity 29. The drive shaft of the linear motor 10 is sealably disposed within the first clearance hole 31.

[0039] Example 4

[0040] like Figure 1-5 As shown, the utility model provides an explosion-proof gas detection device, including an explosion-proof base 1, an explosion-proof shell 5 arranged on the explosion-proof base 1, and a gas detection mechanism arranged in the explosion-proof shell 5; the gas detection mechanism includes an air inlet 8 opened at the top of the explosion-proof shell 5 and communicating with the outside world, an air flow channel opened in the interior of the explosion-proof shell 5 and communicating with the air inlet 8, a number of gas sensors 6 arranged in the air flow channel, an air pump 7 arranged in the air flow channel and connected with the air flow channel and the outside world, and an opening and closing mechanism arranged on the explosion-proof shell 5 for opening and closing the air inlet 8.

[0041] The air inlet 8 includes a first flared opening 2, a narrow opening 3 and a second flared opening 4 opened on the top of the explosion-proof shell 5. The first flared opening 2 is connected to the outside, the second flared opening 4 is connected to the air flow channel, and the narrow opening 3 is connected between the first flared opening 2 and the second flared opening 4.

[0042] The air flow channel includes an explosion-proof cavity 11 opened in the explosion-proof shell 5 and connected to the second expansion port 4, a gas detection cavity 12 connected to the explosion-proof cavity 11, and a first installation cavity 13 connected to the gas detection cavity 12; the gas sensor 6 is located in the gas detection cavity 12, and the air pump 7 is located in the first installation cavity 13.

[0043] In this embodiment 4, a second vent hole 32 is provided on the explosion-proof shell 5, and the explosion-proof chamber 11 and the gas detection chamber 12 are connected through the second vent hole 32. A third vent hole 33 is provided on the mounting base, and the gas detection chamber 12 and the first installation chamber 13 are connected through the third vent hole 33. Inside the explosion-proof shell 5, the gas flows as follows: the external gas enters the narrow opening 3 from the first expansion opening 2, enters the second expansion opening 4 from the narrow opening 3, enters the explosion-proof chamber 11 from the second expansion opening 4, enters the gas detection chamber 12 from the explosion-proof chamber 11, enters the gas detection chamber 12 from the gas detection chamber 12, enters the first installation chamber 13, enters the vacuum pump 7 from the first installation chamber 13, and is discharged to the outside world from the vacuum pump 7. During the process of gas flowing into the gas detection chamber 12, the gas sensor in the gas detection chamber 12 detects the type and concentration of the gas flowing through. Different sensors in the gas detection chamber 12 can detect different types of gases.

[0044] Example 5

[0045] like Figure 1-5As shown, the utility model provides an explosion-proof gas detection device, including an explosion-proof base 1, an explosion-proof shell 5 arranged on the explosion-proof base 1, and a gas detection mechanism arranged in the explosion-proof shell 5; the gas detection mechanism includes an air inlet 8 opened at the top of the explosion-proof shell 5 and communicating with the outside world, an air flow channel opened in the interior of the explosion-proof shell 5 and communicating with the air inlet 8, a number of gas sensors 6 arranged in the air flow channel, an air pump 7 arranged in the air flow channel and connected with the air flow channel and the outside world, and an opening and closing mechanism arranged on the explosion-proof shell 5 for opening and closing the air inlet 8.

[0046] The air inlet 8 includes a first flared opening 2, a narrow opening 3 and a second flared opening 4 opened on the top of the explosion-proof shell 5. The first flared opening 2 is connected to the outside, the second flared opening 4 is connected to the air flow channel, and the narrow opening 3 is connected between the first flared opening 2 and the second flared opening 4.

[0047] The air flow channel includes an explosion-proof cavity 11 opened in the explosion-proof shell 5 and connected to the second expansion port 4, a gas detection cavity 12 connected to the explosion-proof cavity 11, and a first installation cavity 13 connected to the gas detection cavity 12; the gas sensor 6 is located in the gas detection cavity 12, and the air pump 7 is located in the first installation cavity 13.

[0048] A first explosion-proof panel 14 and a second explosion-proof panel 17 are provided in the explosion-proof chamber 11 . A first vent 15 communicating with the explosion-proof chamber 11 is respectively provided on the first explosion-proof panel 14 and the second explosion-proof panel 17 . A fireproof net 16 is pressed between the first explosion-proof panel 14 and the second explosion-proof panel 17 .

[0049] In this embodiment 5, the first explosion-proof panel 14 and the second explosion-proof panel 17 are used to block the impact of the external explosion, thereby preventing the components in the explosion-proof shell 5 from being affected by the external explosion. The fireproof net 16 is used to block the spread of flames, preventing external flames from entering the explosion-proof shell 5, and preventing flames in the explosion-proof shell 5 from entering the outside.

[0050] Example 6

[0051] like Figure 1-5 As shown, the utility model provides an explosion-proof gas detection device, including an explosion-proof base 1, an explosion-proof shell 5 arranged on the explosion-proof base 1, and a gas detection mechanism arranged in the explosion-proof shell 5; the gas detection mechanism includes an air inlet 8 opened at the top of the explosion-proof shell 5 and communicating with the outside world, an air flow channel opened in the interior of the explosion-proof shell 5 and communicating with the air inlet 8, a number of gas sensors 6 arranged in the air flow channel, an air pump 7 arranged in the air flow channel and connected with the air flow channel and the outside world, and an opening and closing mechanism arranged on the explosion-proof shell 5 for opening and closing the air inlet 8.

[0052] The air inlet 8 includes a first flared opening 2, a narrow opening 3 and a second flared opening 4 opened on the top of the explosion-proof shell 5. The first flared opening 2 is connected to the outside, the second flared opening 4 is connected to the air flow channel, and the narrow opening 3 is connected between the first flared opening 2 and the second flared opening 4.

[0053] The air flow channel includes an explosion-proof cavity 11 opened in the explosion-proof shell 5 and connected to the second expansion port 4, a gas detection cavity 12 connected to the explosion-proof cavity 11, and a first installation cavity 13 connected to the gas detection cavity 12; the gas sensor 6 is located in the gas detection cavity 12, and the air pump 7 is located in the first installation cavity 13.

[0054] A first explosion-proof panel 14 and a second explosion-proof panel 17 are provided in the explosion-proof chamber 11 . A first vent 15 communicating with the explosion-proof chamber 11 is respectively provided on the first explosion-proof panel 14 and the second explosion-proof panel 17 . A fireproof net 16 is pressed between the first explosion-proof panel 14 and the second explosion-proof panel 17 .

[0055] A mounting base 18 is fixedly embedded in the explosion-proof shell 5, and the gas sensor 6 is installed on the top of the mounting base 18. A threaded connection tube 19 located in the explosion-proof cavity 11 is provided on the top of the mounting base 18. A threaded rod 20 is threadedly connected to the threaded connection tube 19, and a second explosion-proof plate 17 is provided on the top of the threaded rod 20.

[0056] In this sixth embodiment, the explosion-proof housing 5 includes a first explosion-proof mounting seat 34 hermetically fixed to the explosion-proof base 1, an explosion-proof connecting seat 35 hermetically mounted on the first explosion-proof mounting seat 34, and a second explosion-proof mounting seat 36 hermetically mounted on the explosion-proof connecting seat 35. The mounting seat 18 is fixedly mounted on the second explosion-proof mounting seat 36. The fireproof net 16 is mounted on top of the second explosion-proof panel 17. When the mounting seat 18 is fixedly mounted on the second explosion-proof mounting seat 36, the fireproof net 16 is clamped between the second explosion-proof panel 17 and the first explosion-proof panel 14.

[0057] Example 7

[0058] like Figure 1-5 As shown, the utility model provides an explosion-proof gas detection device, including an explosion-proof base 1, an explosion-proof shell 5 arranged on the explosion-proof base 1, and a gas detection mechanism arranged in the explosion-proof shell 5; the gas detection mechanism includes an air inlet 8 opened at the top of the explosion-proof shell 5 and communicating with the outside world, an air flow channel opened in the interior of the explosion-proof shell 5 and communicating with the air inlet 8, a number of gas sensors 6 arranged in the air flow channel, an air pump 7 arranged in the air flow channel and connected with the air flow channel and the outside world, and an opening and closing mechanism arranged on the explosion-proof shell 5 for opening and closing the air inlet 8.

[0059] The vacuum pump 7 is provided with an air inlet pipe 21 connected to the air flow channel and a flame retardant air outlet pipe 22 connected to the outside. The flame retardant air outlet pipe 22 is provided with a heat insulation valve 23.

[0060] In this embodiment 7, the explosion-proof housing 5 is provided with a mounting hole 38 communicating with the outside world. The flame-retardant gas outlet pipe 22 is sealed and passed through the mounting hole 38. The air pump 7 is used to draw outside gas into the explosion-proof housing 5 so that the gas sensor in the explosion-proof housing 5 can detect the type and concentration of the outside gas. The gas entering the explosion-proof housing 5 is discharged to the outside world through the flame-retardant gas outlet pipe 22 on the air pump 7.

[0061] Example 8

[0062] like Figure 1-5 As shown, the utility model provides an explosion-proof gas detection device, including an explosion-proof base 1, an explosion-proof shell 5 arranged on the explosion-proof base 1, and a gas detection mechanism arranged in the explosion-proof shell 5; the gas detection mechanism includes an air inlet 8 opened at the top of the explosion-proof shell 5 and communicating with the outside world, an air flow channel opened in the interior of the explosion-proof shell 5 and communicating with the air inlet 8, a number of gas sensors 6 arranged in the air flow channel, an air pump 7 arranged in the air flow channel and connected with the air flow channel and the outside world, and an opening and closing mechanism arranged on the explosion-proof shell 5 for opening and closing the air inlet 8.

[0063] A first closed cavity 24 and a second closed cavity 25 are provided on the explosion-proof shell 5. The gas detection mechanism also includes a single-chip microcomputer 26 and a rechargeable battery 27 arranged in the first closed cavity 24, and a liquid crystal touch screen 28 arranged in the second closed cavity 25; the opening and closing mechanism, the gas sensor 6, the air pump 7, the rechargeable battery 27 and the liquid crystal touch screen 28 are respectively connected to the single-chip microcomputer 26.

[0064] In this embodiment 8, the linear motor 10 on the opening and closing mechanism is connected to the single-chip microcomputer 26, the thermal insulation valve 23 is connected to the single-chip microcomputer 26, and the rechargeable battery 27 is used to supply power to the single-chip microcomputer 26, the linear motor 10, the gas sensor 6, the air pump 7, the LCD touch screen 28, and the single-chip microcomputer 26. When performing gas detection, the single-chip microcomputer 26 controls the opening of the thermal insulation valve 23 and the operation of the linear motor 10. The linear motor 10 drives the corresponding sealing and thermal insulation block to move so that the air inlet 8 is open. At this time, the single-chip microcomputer 26 controls the operation of the air pump 7, which draws external gas into the explosion-proof shell 5. The gas sensor 6 in the explosion-proof shell 5 detects the gas drawn into the explosion-proof shell 5 and transmits the detection results to the single-chip microcomputer 26. The single-chip microcomputer 26 transmits the received detection results to the LCD touch screen 28 for display.

[0065] When it is necessary to block the inside of the explosion-proof shell 5 from communicating with the outside world, the single-chip microcomputer 26 controls the insulation valve 23 to close and controls the linear motor 10 to run. The linear motor 10 drives the corresponding sealing insulation block to move until the two sealing insulation blocks 9 on the opening and closing mechanism are sealed and fitted with each other. The air inlet 8 channel is closed. In this way, the inside of the explosion-proof shell 5 can be blocked from communicating with the outside world.

[0066] The explosion-proof base 1 is provided with a threaded post 37, which allows the present invention to be installed on other equipment for use. When it is necessary to view the gas detection results, the first explosion-proof mounting bracket 34 is removed from the explosion-proof base 1, and the results displayed on the LCD touch screen 28 can be viewed. The purpose of installing the LCD touch screen 28 in the second enclosed cavity 25 is to separate the second enclosed cavity 25 from other devices involved in gas detection, thereby preventing the heat generated by the operation of other devices from affecting the LCD touch screen 28. At the same time, when a combustion or explosion occurs in the external environment, the LCD touch screen 28 can be protected from damage caused by the external combustion or explosion.

[0067] The model of the single chip microcomputer 26 of the present invention is STM32F103xC single chip microcomputer.

[0068] The gas sensor 6, air pump 7, linear motor 10, thermal insulation valve 23, single-chip microcomputer 26, rechargeable battery 27, and LCD touch screen 28 used in the present invention are all existing known electrical equipment and can be directly purchased and used on the market. The structure, circuit, and control principle of the gas sensor 6, air pump 7, linear motor 10, thermal insulation valve 23, single-chip microcomputer 26, rechargeable battery 27, and LCD touch screen 28 are all existing known technologies. Therefore, the structure, circuit, and control principle of the gas sensor 6, air pump 7, linear motor 10, thermal insulation valve 23, single-chip microcomputer 26, rechargeable battery 27, and LCD touch screen 28 will not be repeated here.

[0069] Finally, it should be noted that the above embodiments are merely preferred embodiments of the present invention and are intended to illustrate the technical solutions of the present invention, rather than to limit them, and certainly not to limit the patent scope of the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention. In other words, any changes or embellishments made to the main design concept and spirit of the present invention that have no substantive significance, provided that the technical problems they solve are still consistent with those of the present invention, should be included in the protection scope of the present invention. In addition, the direct or indirect application of the technical solutions of the present invention in other related technical fields should also be included in the patent protection scope of the present invention.

Claims

1. An explosion-proof gas detection device, characterized in that: The invention comprises an explosion-proof base (1), an explosion-proof shell (5) arranged on the explosion-proof base (1), and a gas detection mechanism arranged in the explosion-proof shell (5); the gas detection mechanism comprises an air inlet (8) opened on the top of the explosion-proof shell (5) and communicating with the outside world, an air flow channel opened in the interior of the explosion-proof shell (5) and communicating with the air inlet (8), a plurality of gas sensors (6) arranged in the air flow channel, an air pump (7) arranged in the air flow channel and communicating with the air flow channel and the outside world, and an opening and closing mechanism arranged on the explosion-proof shell (5) for opening and closing the air inlet (8).

2. An explosion-proof gas detection device according to claim 1, characterized in that: The air inlet (8) comprises a first flared opening (2), a narrow opening (3) and a second flared opening (4) which are opened on the top of the explosion-proof shell (5); the first flared opening (2) is communicated with the outside, the second flared opening (4) is communicated with the air flow channel, and the narrow opening (3) is communicated between the first flared opening (2) and the second flared opening (4).

3. An explosion-proof gas detection device according to claim 2, characterized in that: The opening and closing mechanism comprises two sealing and heat-insulating blocks (9) adapted to each other and respectively located in the narrow opening (3), and two linear motors (10) provided on the explosion-proof shell (5) and respectively connected to the two sealing and heat-insulating blocks (9) in a one-to-one correspondence.

4. The explosion-proof gas detection device according to claim 2, characterized in that: The air flow channel comprises an explosion-proof cavity (11) opened in the explosion-proof shell (5) and connected to the second expansion port (4), a gas detection cavity (12) connected to the explosion-proof cavity (11), and a first installation cavity (13) connected to the gas detection cavity (12); the gas sensor (6) is located in the gas detection cavity (12), and the air pump (7) is located in the first installation cavity (13).

5. The explosion-proof gas detection device according to claim 4, characterized in that: A first explosion-proof panel (14) and a second explosion-proof panel (17) are provided in the explosion-proof chamber (11). The first explosion-proof panel (14) and the second explosion-proof panel (17) are respectively provided with a first vent hole (15) connected to the explosion-proof chamber (11). A fireproof net (16) is pressed between the first explosion-proof panel (14) and the second explosion-proof panel (17).

6. The explosion-proof gas detection device according to claim 5, characterized in that: A mounting seat (18) is fixedly embedded in the explosion-proof shell (5), and a gas sensor (6) is installed on the top of the mounting seat (18). A threaded connection tube (19) located in the explosion-proof cavity (11) is provided on the top of the mounting seat (18). A threaded rod (20) is threadedly connected to the threaded connection tube (19), and a second explosion-proof plate (17) is provided on the top of the threaded rod (20).

7. The explosion-proof gas detection device according to claim 1, characterized in that: The air pump (7) is provided with an air inlet pipe (21) connected to the air flow channel and a flame retardant air outlet pipe (22) connected to the outside world. The flame retardant air outlet pipe (22) is provided with a heat insulation valve (23).

8. The explosion-proof gas detection device according to claim 1, characterized in that: The explosion-proof housing (5) is provided with a first closed cavity (24) and a second closed cavity (25); the gas detection mechanism further comprises a single chip microcomputer (26) and a rechargeable battery (27) arranged in the first closed cavity (24), and a liquid crystal touch screen (28) arranged in the second closed cavity (25); the opening and closing mechanism, the gas sensor (6), the air pump (7), the rechargeable battery (27) and the liquid crystal touch screen (28) are respectively connected to the single chip microcomputer (26).

Images