Combustible gas alarm

Abstract

The invention relates to the field of safety detection production, in particular to a combustible gas alarm which comprises a combustible gas detection body, an alarm cylinder is arranged on one side of the combustible gas detection body, a gas inlet is formed in the bottom of the combustible gas detection body, an exhaust port is formed in the top of the combustible gas detection body, and a gas outlet is formed in the top of the combustible gas detection body. By arranging the valve linkage assembly, a valve channel is finely adjusted according to the moisture absorption weight change of a drying agent, the weight of the drying agent is increased after the drying agent absorbs moisture, the placing frame is driven to slide downwards, and through transmission of a driving rack plate, a conveying gear and a driven rack plate, a driving valve plate moves to change the size of a valve disc channel; the self-adaptive adjusting mechanism can ensure that the amount of air entering the detection ring cover under different humidity is appropriate, the situation that the detection sensor detects the concentration of combustible gas is interfered by excessive moisture is avoided, the air inlet amount can be accurately adjusted under different humidity environments, and the detection precision is ensured.

Description

Technical Field

[0001] The invention relates to the field of safety detection production, in particular to a combustible gas alarm. Background Art

[0002] In today's society, with the continuous advancement of science and technology and the improvement of people's living standards, people pay more and more attention to life safety. Combustible gas is a widely used energy source in daily life, but the dangers of fire, explosion and poisoning caused by its leakage cannot be ignored. Common flammable gases in family life are natural gas and liquefied gas. Leakage of natural gas and liquefied gas may cause explosion and fire. Therefore, it is necessary to set up a combustible gas alarm, which is a device used to detect combustible gas leakage and issue an alarm. It usually uses a sensor to detect the concentration of combustible gas and sends out an audible and visual alarm signal when the concentration exceeds the set threshold to remind people to take appropriate measures to avoid fire and explosion accidents.

[0003] In daily use, the air itself contains a certain amount of water vapor. For example, a large amount of water vapor is generated in the process of using hot water and cooking in the kitchen. The water vapor easily enters the combustible gas alarm, affecting the performance of the detection sensor and further affecting the accuracy of the detection. The existing solution is to place a desiccant inside the combustible gas alarm to dry the moisture, thereby achieving the purpose of drying.

[0004] An existing combustible gas alarm has certain defects during use: because the combustible gas alarm often has only a simple on or off mechanism when responding to humidity changes, for example, some alarms may only use a simple waterproof cover or sealing structure to reduce the entry of water vapor, but when the humidity is high, it is impossible to make fine adjustments according to the specific degree of humidity, which may cause the air to enter completely when the humidity increases slightly, affecting the detection of combustible gas. Secondly, in order to prevent dust and other impurities from entering the interior and affecting the performance of the sensor, many combustible gas alarms are equipped with filters at the air inlet. However, the dust gathered on the filter comes into contact with water vapor to form a mud-like substance. The mud-like substance will produce moisture for a long time and diffuse inside the combustible gas alarm, further reducing the detection performance.

[0005] Therefore, it is necessary to propose a combustible gas alarm to solve the above technical problems. Summary of the invention

[0006] In view of the shortcomings of the prior art, the present invention provides a combustible gas alarm that solves the technical problems that the mechanism for responding to humidity changes is simple, mostly in on or off mode, and cannot be finely adjusted, and the air inlet filter gathers dust and combines with water vapor to form a mud-like substance, and the generated moisture diffuses inside the alarm, reducing the detection performance.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] The technical solution adopted by the present invention to solve the technical problem is: a combustible gas alarm, comprising a combustible gas detection body, an alarm tube is arranged on one side of the combustible gas detection body, an air inlet is arranged at the bottom of the combustible gas detection body, and an exhaust port is arranged at the top of the combustible gas detection body;

[0009] The detection ring cover is a ring-shaped structure with a conical bottom, which is arranged in the inner cavity of the combustible gas detection body and is used for conveying the external combustible gas;

[0010] A desiccant, which is in a ring-shaped structure and is arranged inside the detection ring cover to dry the gas with moisture;

[0011] A detection sensor is arranged on the top of the detection ring cover and is used to detect combustible gas;

[0012] A filter screen is arranged above the air inlet and is used to filter the gas with impurities;

[0013] A valve linkage assembly is arranged inside the detection ring cover and is used to change the passage of the air inlet when the weight of the desiccant increases due to moisture absorption;

[0014] The mud cleaning component is arranged on the filter screen and is used for automatically cleaning the impurities in the filter screen under the condition of moisture.

[0015] Preferably, the valve linkage assembly comprises:

[0016] The valve disc is in a ring-shaped structure and has a circular hole in the middle. The valve disc is installed below the detection ring cover and is in communication with the detection ring cover.

[0017] A placement rack, with its opening facing upward, is used to store desiccant and can slide up and down in the circular structure of the detection ring cover;

[0018] The number of the air inlet slots is at least one and they are arranged in a circular array on the placement rack and are used to transport the combustible gas;

[0019] There is at least one spring rod, which is installed in an annular array in the inner cavity of the detection ring cover;

[0020] A driving rack plate, the number of which is at least one, which is in an L-shaped structure, and a gear is installed at its vertical end, the end of its horizontal end is fixedly connected to the placement frame, and the middle of its horizontal end is slidably connected to the top of the spring rod;

[0021] A transmission gear, which is mounted on the outer side of the valve disc and meshes with the driving rack plate;

[0022] A passive rack plate, the number of which is at least one, and which is connected to the outer side of the valve disc through a slide rail, and which meshes with the lower side of the transmission gear;

[0023] There are three driving valve plates, which are triangular in shape near the central axis of the valve disc. The triangular structures of the three driving valve plates can form a complete circular structure when they are completely closed in the valve disc.

[0024] Preferably, a sealing cover is installed on the top of the combustible gas detection body, the sealing cover is connected to the exhaust port, a plurality of exhaust pipes in a ring array are installed between the sealing cover and the detection ring cover, a fan is installed inside the sealing cover, a guide ring is installed below the sealing cover, the bottom end of the guide ring is set as a protruding cylindrical structure, a ventilation pipe connected to the detection ring cover is installed at the bottom of the cylindrical structure of the guide ring, and a rotating component is provided on the placement rack, which is used for the placement rack to slide down along the detection ring cover due to gravity, and the kinetic energy of the sliding movement causes the desiccant to rotate, so that the moist part of the desiccant can fully contact with the air blown out by the fan.

[0025] Preferably, the rotating assembly comprises:

[0026] A telescopic rod, which is installed below the placement rack and has a hexagonal structure;

[0027] A telescopic cylinder, which is slidably connected to the lower part of the telescopic rod;

[0028] There are at least three drive plates installed below the telescopic cylinder, and the drive plates are away from the axis of the telescopic cylinder and are inclined to the inclined surface of the drive valve plate;

[0029] A coil spring mounted on the top of the rack;

[0030] The support frame is rotatably connected to the top of the placement frame and is fixedly connected to the telescopic rod through a connecting rod. The other end of the coil spring is fixedly connected to the support frame, and the desiccant is placed on the top surface of the support frame.

[0031] Preferably, a triangular plate is installed on the placement rack between the spaced air inlet grooves, a circular hole is provided on the top of the triangular plate, an annular plate fixedly connected to the triangular plate is installed on the top of the placement rack, a plate-shaped hole is provided on the annular plate close to the axial direction of the placement rack, an air expulsion pipe is provided on the top of the annular plate, and the end of the air expulsion pipe away from the triangular plate is connected to the cylindrical structure of the guide ring.

[0032] Preferably, the mud cleaning assembly comprises:

[0033] The mud cleaning disc is in the shape of a hollow ring. The mud cleaning disc is installed below the valve disc and is in communication with the valve disc. The filter screen is plugged and installed in the inner cavity of the mud cleaning disc.

[0034] The collecting hood is hollow and opens upward, is threadedly connected to the bottom of the mud cleaning tray, and is located in the middle of the air inlet;

[0035] There are six cleaning plates, one end of which slides through the filter screen through the middle of the cleaning plates and is fixedly connected to the telescopic cylinder;

[0036] A cleaning pipe is installed on one side of the guide ring located in the cylindrical structure, one end of the cleaning pipe is connected to the inner side of the mud cleaning disc, and the air outlet end of the cleaning pipe is located below the filter screen.

[0037] Preferably, the cleaning plate is arranged obliquely below the filter screen to quickly clean the impurities with moisture on the filter screen. The air outlet end of the cleaning pipe is located on one side of the inclined portion of the cleaning plate and is arranged in the forward direction of the cleaning plate.

[0038] Preferably, an elastic seal is installed between the horizontal end of the driving rack plate and one side of the detection ring cover, and the elastic seal has a snake-shaped structure.

[0039] Preferably, the air inlet is in a semi-arc shape, and an air pipe for conveying gas to the interior of the mud cleaning pan is installed in the air inlet, and the air pipe is arranged in an inclined manner.

[0040] Preferably, a push spring rod is slidably connected to the middle part of the front end of the combustible gas detection body, one end of the push spring rod slides through the interior of the combustible gas detection body and is installed with a push plate, and the end of the push plate away from the push spring rod corresponds to and is tightly attached to one of the passive rack plates.

[0041] Beneficial effects:

[0042] (1) The present invention sets a valve linkage component to finely adjust the valve channel according to the change in the weight of the desiccant after moisture absorption. The weight of the desiccant increases after absorbing moisture, driving the placement rack to slide down. The driving rack plate, the transmission gear, and the passive rack plate drive the driving valve plate to move and change the size of the valve plate channel. This adaptive adjustment mechanism can ensure that the amount of air entering the detection ring cover under different humidity is appropriate, and excessive moisture interferes with the detection sensor to detect the concentration of combustible gas. The air intake volume can be accurately adjusted under different humidity environments to ensure the detection accuracy. In a high humidity environment, the alarm tube can still work stably and accurately. On the one hand, the desiccant can absorb moisture to avoid moisture interfering with the detection sensor. On the other hand, when the alarm is triggered, the fan is started, and the air contacts the rotating desiccant to promote the volatilization of moisture. At the same time, the semi-arc shape structure of the air inlet and the air supply pipe design can prevent some water droplets from entering the detection ring cover. The air supply pipe drains the moisture to the mud removal disk for treatment. These measures jointly reduce the accumulation of moisture inside the equipment, reduce the erosion of moisture inside the equipment, extend the service life of the equipment, and reduce the occurrence rate of failures caused by humidity.

[0043] (2) The present invention sets a mud cleaning component. When the valve linkage component is started, the fan sends gas into the mud cleaning plate through the cleaning pipe to impact the surface of the filter screen, so that the impurity moisture volatilizes and the impurities in the filter holes are dehumidified. At the same time, the cleaning plate is driven to rotate to clean the impurities on the surface of the filter screen. The impurities fall into the collection cover. The cleaning plate is arranged at an angle and the air outlet end of the cleaning pipe is reasonably positioned, which enhances the cleaning effect and can effectively remove stubborn impurities adhered by moisture. The present invention can automatically clean the mud-like substances formed on the filter screen due to moisture and impurities, reduce detection errors and equipment failures caused by moisture on the impurities, ensure the cleanliness of the filter screen, and ensure normal gas filtration.

[0044] (3) The present invention sets a spring rod and a push plate to cooperate with each other. The staff can push the spring rod to indirectly drive the cleaning plate to rotate and clean the impurities in the filter screen through the push plate, the passive rack plate and the valve linkage assembly, thereby preventing the impurities from accumulating and retaining moisture, and avoiding abnormal gas composition and flow entering the detection ring cover. This is beneficial for manual and timely cleaning when the desiccant moisture absorption change is small but there may be impurity problems in the filter screen, thereby further ensuring the detection accuracy and improving the reliability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0046] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0047] Figure 2 It is a schematic diagram of the detection ring cover of the present invention;

[0048] Figure 3 It is a cross-sectional view of the overall structure of the present invention;

[0049] Figure 4 It is a cross-sectional view of the interior of the detection ring cover of the present invention;

[0050] Figure 5 An exploded view of the interior of the detection ring cover of the present invention;

[0051] Figure 6 for Figure 4 A partial enlarged view of middle A;

[0052] Figure 7 It is a schematic diagram of the valve disk of the present invention;

[0053] Figure 8 It is a schematic diagram of the triangular plate and the annular plate of the present invention;

[0054] Fig. 9 It is a schematic diagram of the mud cleaning assembly of the present invention;

[0055] Fig.10 for Fig.10 A partial enlarged view of B in the middle;

[0056] Fig.11 for Figure 5 A partial enlarged view of middle C;

[0057] Fig.12 for Figure 3 A partial enlarged view of D in the middle.

[0058] Numbers in the figure:

[0059] 1. Combustible gas detection body; 11. Alarm tube; 12. Air inlet; 121. Exhaust port; 122. Exhaust pipe; 13. Detection ring cover; 14. Desiccant; 15. Detection sensor; 16. Filter;

[0060] 2. Valve linkage assembly; 20. Valve plate; 21. Placement rack; 210. Air inlet groove; 22. Spring rod; 23. Drive rack plate; 24. Transmission gear; 25. Passive rack plate; 26. Drive valve plate; 27. Sealing cover; 28. Fan; 29. ​​Guide ring; 211. Rotating assembly; 212. Telescopic rod; 213. Telescopic cylinder; 214. Drive plate; 215. Coil spring; 216. Support frame; 221. Triangular plate; 222. Ring plate; 223. Air expelling pipe; 231. Elastic sealing element;

[0061] 3. Mud cleaning assembly; 31. Mud cleaning tray; 32. Collecting cover; 33. Cleaning plate; 34. Cleaning tube; 311. Push spring rod; 312. Push plate. DETAILED DESCRIPTION

[0062] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0063] like Figure 1-Figure 3 As shown, a combustible gas alarm comprises a combustible gas detection body 1, an alarm tube 11 is arranged on one side of the combustible gas detection body 1, an air inlet 12 is arranged at the bottom of the combustible gas detection body 1, and an exhaust port 121 is arranged at the top of the combustible gas detection body 1; a detection ring cover 13, which has a ring-shaped structure and a conical structure at the bottom, is arranged in the inner cavity of the combustible gas detection body 1, and is used for conveying external combustible gas; a desiccant 14, which has a ring-shaped structure, is arranged on the inner side of the detection ring cover 13, and is used for drying gas with moisture. When the ambient humidity changes, the desiccant 14 can effectively absorb moisture to prevent moisture from interfering with the detection sensor 15. A stable and dry environment helps it to detect the concentration of combustible gas more accurately and reduce the detection caused by humidity. quantity error; a detection sensor 15, which is arranged at the top of the detection ring cover 13, is used to detect combustible gas; a filter 16, which is arranged above the air inlet 12, is used to filter the gas with impurities. The existence of the filter 16 effectively prevents impurities from entering the detection ring cover 13, thereby protecting the detection sensor 15 from interference by impurities; a valve linkage assembly 2, which is arranged inside the detection ring cover 13, is used to change the channel of the air inlet 12 when the weight of the desiccant 14 increases due to moisture absorption, and finely adjust the channel of the air inlet 12 according to the increase in the moisture absorption weight of the desiccant 14. This adaptive adjustment mechanism ensures that the amount of air entering the detection ring cover 13 can be maintained at an appropriate level under different humidity conditions, creating a stable working environment for the detection sensor 15, and further improving the detection accuracy;

[0064] like Figure 2-Figure 6 As shown, the valve linkage assembly 2 includes: a valve disc 20, which is annular in structure and has a circular hole in the middle, and the valve disc 20 is installed below the detection ring cover 13 and is connected; a placement rack 21, which has an upward opening and is used to store the desiccant 14, and can slide up and down in the circular structure of the detection ring cover 13; an air inlet groove 210, which is at least one in number and is opened on the placement rack 21 in an annular array for conveying combustible gas; a spring rod 22, which is at least one in number and is installed in the inner cavity of the detection ring cover 13 in an annular array; a driving rack plate 23, which is at least one in number and has an L-shaped structure, and a gear is installed at its vertical end, and its horizontal end is fixedly connected to the placement rack 21, and the middle of its horizontal end is slidably connected to the top of the spring rod 22; a transmission gear 24, which is installed on the outer side of the valve disc 20 and meshes with the driving rack plate 23;

[0065] There is at least one passive rack plate 25, which is connected to the outside of the valve disc 20 through a slide rail and meshes with the bottom of the transmission gear 24. There are three driving valve plates 26, which are triangular in shape near the central axis of the valve disc 20. The triangular structure of the three driving valve plates 26 can form a complete circular structure when the valve disc 20 is fully closed.

[0066] It should be noted that the gas enters and the desiccant 14 absorbs moisture: the gas in the external environment (which may contain combustible gas, moisture and impurities) enters from the air inlet 12, passes through the valve disc 20 and enters the inside of the detection ring cover 13. At this time, if the gas contains moisture, the moisture will contact the desiccant 14 placed in the placement rack 21. The desiccant 14 has a hygroscopic property. As the moisture absorption increases, its own gravity increases.

[0067] The placement rack 21 moves: Due to the increase in the gravity of the desiccant 14, the placement rack 21 slides down along the inner wall of the detection ring cover 13 under the action of gravity. During this process, the spring inside the spring rod 22 slidably connected to the middle of the horizontal end of the placement rack 21 is compressed. At the same time, the downward movement of the placement rack 21 drives the driving rack plate 23 fixedly connected thereto to move downward;

[0068] Gear rack transmission: The gear teeth at the vertical end of the driving rack plate 23 mesh with the transmission gear 24. When the driving rack plate 23 moves downward, it drives the transmission gear 24 to rotate in the reverse direction. The reverse rotation of the transmission gear 24 meshes with the passive rack plate 25, thereby driving the passive rack plate 25 to move toward the inside of the valve disc 20;

[0069] Change of valve channel: The movement of the passive rack plate 25 pushes the driving valve plate 26 in the triangular structure in the valve disc 20 to move along the circular hole of the valve disc 20 toward the central axis. Since the three driving valve plates 26 can form a complete circular structure when fully closed, their movement will change the channel size of the valve disc 20, thereby adjusting the air intake. When the humidity continues to increase and the weight of the desiccant 14 continues to change, the above process continues, and the valve channel size is also continuously adjusted accordingly until it is fully closed;

[0070] Alarm: When the detection sensor 15 detects combustible gas, the alarm tube 11 will sound an alarm to alert the staff;

[0071] The present invention realizes automatic and precise adjustment of the air intake volume according to the ambient humidity through the valve linkage component 2. Different from the traditional alarm with only a simple opening or closing mechanism, it can finely adjust the valve channel according to the amount of moisture (reflected by the weight change of the desiccant 14), ensuring that in different humidity environments, there is enough air to enter the detection ring cover 13 for detecting combustible gases, and the detection results are not affected by excessive moisture, so that the alarm tube 11 can still work stably and accurately in a high humidity environment.

[0072] like Figure 3-Figure 4 As shown, a sealing cover 27 is installed on the top of the combustible gas detection body 1, and the sealing cover 27 is connected to the exhaust port 121. A plurality of exhaust pipes 122 in a circular array are installed between the sealing cover 27 and the detection ring cover 13. A fan 28 is installed inside the sealing cover 27, and a guide ring 29 is installed below the sealing cover 27. The bottom end of the guide ring 29 is set as a protruding cylindrical structure, and a ventilation pipe connected to the detection ring cover 13 is installed at the bottom of the cylindrical structure of the guide ring 29. A rotating component 211 is provided on the placement rack 21, which is used for the placement rack 21 to slide down along the detection ring cover 13 due to gravity, and the kinetic energy of the sliding movement causes the desiccant 14 to rotate, so that the humid part of the desiccant 14 can fully contact with the air blown out by the fan 28.

[0073] It should be noted that when the alarm cylinder 11 sounds an alarm, the fan 28 is driven, and the fan 28 draws the external air into the sealing cover 27, and then enters the detection ring cover 13 through the ventilation pipe. At the same time, when the placement rack 21 slides down, its rotating assembly 211 uses the kinetic energy of the slide to cause the desiccant 14 to rotate, so that the wet part of the desiccant 14 can fully contact with the air blown out by the fan 28, mix the moisture inside the detection ring cover 13 with the air, and cause the moisture inside the desiccant 14 to volatilize, and the air is finally discharged through the exhaust pipe 122 and the exhaust port 121.

[0074] like Figure 5 and Figure 8 As shown, the rotating assembly 211 includes: a telescopic rod 212, which is installed below the placement rack 21 and has a hexagonal structure; a telescopic cylinder 213, which is slidably connected to the bottom of the telescopic rod 212; a driving plate 214, which is at least three in number and is installed below the telescopic cylinder 213, and the driving plate 214 is away from the axial direction of the telescopic cylinder 213 and is inclined to the inclined direction of the driving valve plate 26; a disc spring 215, which is installed on the top of the placement rack 21; a support frame 216, which is rotatably connected to the top of the placement rack 21 and is fixedly connected to the telescopic rod 212 through a connecting rod, and the other end of the disc spring 215 is fixedly connected to the support frame 216, and the desiccant 14 is placed on the top surface of the support frame 216.

[0075] It should be noted that, in the initial state, the desiccant 14 is placed on the top surface of the support frame 216, and the coil spring 215 is in a certain power storage state. When the valve linkage assembly 2 drives the three sets of driving valve plates 26 to move along the axis of the valve disc 20 due to the change in the moisture absorption weight of the desiccant 14, the driving valve plates 26 interact with the driving plate 214, so that the driving plate 214 starts to rotate, and the rotation of the driving plate 214 drives the telescopic cylinder 213 connected thereto to rotate synchronously, and the rotation of the telescopic cylinder 213 is transmitted to the telescopic rod 212, and the telescopic rod 212 rotates accordingly. At the same time, the rotation of the telescopic rod 212 drives the support frame 216 to rotate, so that the humidified part can fully contact the air blown out by the fan 28, thereby enhancing the mixing effect of air and desiccant 14, thereby further improving the volatilization efficiency of moisture inside the desiccant 14.

[0076] like Figure 5 and Figure 8 As shown, a triangular plate 221 is installed between the spaced air inlet grooves 210 on the placement rack 21, a circular hole is provided on the top of the triangular plate 221, an annular plate 222 fixedly connected to the triangular plate 221 is installed on the top of the placement rack 21, the annular plate 222 is provided with a plate-shaped hole close to the axial direction of the placement rack 21, an air expelling pipe 223 is provided on the top of the annular plate 222, and the end of the air expelling pipe 223 away from the triangular plate 221 is connected to the cylindrical structure of the guide ring 29.

[0077] It should be noted that the gas transmission path is started: when the fan 28 is started, the external air is sucked into the sealing cover 27, and then enters the cylindrical structure of the guide ring 29. Then, the air enters the purge pipe 223 from the guide ring 29. The purge pipe 223 serves as a channel for air transmission and guides the air to the inside of the annular plate 222;

[0078] Flow of air between the annular plate 222 and the triangular plate 221: After the air gathers inside the annular plate 222, due to the plate-shaped holes, the air will flow through these plate-shaped holes toward the placement rack 21. At the same time, the air will also pass through the circular hole opened on the top of the triangular plate 221. The triangular plate 221 is located between the spaced air inlet grooves 210. In the process of passing through these holes, the air contacts the bottom and side walls of the desiccant 14. Due to the special structure and layout of the triangular plate 221 and the annular plate 222, the air can evenly contact the bottom and side walls of the desiccant 14 from multiple directions. This uniform contact allows the moisture on the surface of the desiccant 14 to be fully mixed with the air, which speeds up the diffusion rate of moisture into the air, thereby once again improving the volatilization effect of the desiccant 14.

[0079] like Figure 5 , Figure 7 and Fig. 9As shown, the mud cleaning component 3 is arranged on the filter screen 16, and is used for automatically cleaning the impurities in the filter screen 16 under humid conditions. The mud cleaning component 3 includes: a mud cleaning plate 31, which is a hollow ring-shaped structure. The mud cleaning plate 31 is installed below the valve plate 20 and is connected to the valve plate 20. The filter screen 16 is plugged and installed in the inner cavity of the mud cleaning plate 31; a collecting hood 32, which is hollow and opens upward, is threadedly connected to the bottom of the mud cleaning plate 31, and is located in the middle of the air inlet 12; there are six cleaning plates 33, and the middle of them is fixedly connected to the telescopic cylinder 213 after sliding through the filter screen 16 through one end of the connecting rod; a guide ring 29 is located on one side of the cylindrical structure and is equipped with a cleaning pipe 34, one end of the cleaning pipe 34 is connected to the inner side of the mud cleaning plate 31, and the air outlet end of the cleaning pipe 34 is located below the filter screen 16.

[0080] It should be noted that when the valve linkage assembly 2 is started, the fan 28 works first. The fan 28 sends the gas into the inner side of the mud cleaning disk 31 through the cleaning pipe 34, and makes the gas rush to the surface of the filter 16. At this time, the moisture in the impurities with moisture begins to volatilize under the impact of the gas. At the same time, under the action of the air pressure of the fan 28, the dried gas inside the detection ring cover 13 also enters the filter holes in the filter 16, which helps to dehumidify the impurities adsorbed in the filter holes of the filter 16. After the valve linkage assembly 2 is started, the connecting rod is driven to move through the driving plate 214, and the movement of the connecting rod drives the cleaning plate 33 to rotate. During the rotation process, the cleaning plate 33 cleans the impurities on the surface of the filter 16. After the cleaning plate 33 cleans the impurities on the surface of the filter 16, the impurities fall into the collection cover 32 through the mud cleaning disk 31 under the action of gravity and gather, thereby realizing the collection of impurities;

[0081] It is worth noting that the air inlet 12 is in a semi-arc shape, and an air pipe for transporting gas to the mud cleaning tray 31 is installed in the air inlet 12, and the air pipe is arranged in an inclined manner. First, the semi-arc shape structure guides the gas flow, so that the moisture has a specific flow direction in the air inlet 12. During this transportation process, the water droplets in the moisture will flow along the semi-arc shape, which will prevent a part of the water droplets from entering the detection ring cover 13, so as to avoid a large amount of moisture from interfering with the detection sensor 15 and ensure the accuracy of the detection result. Secondly, the existence of the air pipe provides an additional flow path for moisture, which can drain the moisture in the air inlet 12 to the mud cleaning tray 31, and the inclined arrangement can make the water droplets passing through the inside of the air pipe flow along the direction of the air inlet 12, so that the water droplets can gather at the air inlet 12, and the water droplets can be sprayed out in the cooperation of the mud cleaning component 3 to keep the air inlet 12 and the air pipe dry.

[0082] The impurities are wetted by the blower 28 and mechanically cleaned by the cleaning plate 33, and the impurities are collected by the collecting hood 32, so as to reduce the detection error and equipment failure caused by the moisture on the impurities;

[0083] like Fig. 9 and Fig.10 As shown, the cleaning plate 33 is arranged obliquely below the filter screen 16 for quickly cleaning the impurities with moisture on the filter screen 16. The air outlet end of the cleaning pipe 34 is located on one side of the inclined portion of the cleaning plate 33 and is arranged in the forward direction of the cleaning plate 33.

[0084] This inclined structure is conducive to the impurities to slide down quickly along the inclined surface under the action of gravity and the centrifugal force generated by the rotation of the cleaning plate 33. At the same time, when the fan 28 blows out gas through the cleaning pipe 34, the gas flows along the inclined direction of the cleaning plate 33, forming a driving force on the impurities on the cleaning plate 33, further enhancing the cleaning effect of the impurities. When the cleaning plate 33 stops rotating, the spring potential energy of the coil spring 215 is released, prompting the cleaning plate 33 to reset. When the cleaning plate 33 is reset, it can be purged again in the inclined direction of the cleaning plate 33 through the cleaning pipe 34. For sticky impurities with moisture, the blowing of gas can help them overcome the viscosity and be more easily removed by the cleaning plate 33, thereby ensuring the cleanliness of the filter screen 16.

[0085] It is worth noting that the cleaning plate 33 is arranged in an inclined manner, which can guide the gas blown out of the cleaning pipe 34 and form a wider and more directional airflow on the surface of the filter 16. This airflow can blow up or loosen impurities originally attached to different positions on the surface of the filter 16, especially some more stubborn impurities adhered due to moisture, making it easier for them to be swept away by the cleaning plate 33 during the rotation process, thereby further improving the efficiency of impurities being separated from the surface of the filter 16.

[0086] like Figure 4 and Fig.11 As shown, an elastic seal 231 is installed between the horizontal end of the driving rack plate 23 and one side of the detection ring cover 13, and the elastic seal 231 has a snake-shaped structure.

[0087] When the driving rack plate 23 slides downward, the snake-shaped elastic seal 231 will undergo corresponding deformation as the driving rack plate 23 moves, and can always fit tightly between the driving rack plate 23 and the detection ring cover 13, adaptively adjust and maintain the sealing state, thereby effectively preventing the gas inside the detection ring cover 13 from being discharged through here.

[0088] like Figure 3 and Fig.12As shown, a push spring rod 311 is slidably connected to the middle of the front end of the combustible gas detection body 1, and one end of the push spring rod 311 slides through the interior of the combustible gas detection body 1 and is installed with a push plate 312, and the end of the push plate 312 away from the push spring rod 311 corresponds to one of the passive rack plates 25 and is tightly attached.

[0089] When the desiccant 14 is slightly affected by moisture, the staff can push the spring rod 311 manually. The movement of the spring rod 311 will drive the push plate 312 to move synchronously. When the push plate 312 moves, it will push the passive rack plate 25 closely attached to it to move along the inside of the valve disc 20. The movement of the passive rack plate 25 will play a role through the valve linkage assembly 2, and then indirectly drive. When the cleaning plate 33 rotates, the impurities with moisture on the surface of the filter screen 16 can be cleaned, and the impurities can be swept away from the filter screen 16 to achieve the purpose of manual cleaning. When the moisture absorption change of the desiccant 14 is small but there may still be impurity problems in the filter screen 16, this manual cleaning mechanism can clean the impurities on the filter screen 16 in time to prevent the impurities from accumulating and retaining moisture, resulting in abnormal gas composition and flow entering the detection ring cover 13, thereby ensuring the detection accuracy of the detection sensor 15 and improving the reliability of the combustible gas alarm.

[0090] The working principle of the present invention is: the present invention is used for a combustible gas alarm, when in use,

[0091] Gas entry and processing: External gas containing combustible gas, moisture and impurities enters from the semi-arc-shaped air inlet 12, and enters the detection ring cover 13 through the valve plate 20. The semi-arc structure of the air inlet 12 and the air pipe can guide moisture, and some water droplets are prevented from entering the detection ring cover 13. The air pipe guides the moisture to the mud removal plate 31. The inclined air pipe makes the water droplets gather toward the air inlet 12, and the gas first passes through the filter 16 to filter out impurities;

[0092] Desiccant 14 moisture absorption and valve adjustment: If the gas contains moisture, it will be absorbed by the ring-shaped desiccant 14 in the detection ring cover 13. After moisture absorption, the gravity of the desiccant 14 increases, and the placement rack 21 slides down, driving the drive rack plate 23 to move. Through the cooperation of the dynamic transmission gear 24 and the passive rack plate 25, the drive valve plate 26 moves, changing the size of the valve plate 20 channel to adjust the air intake. This process is sealed by the elastic seal 231;

[0093] Alarm and ventilation and dehumidification: When the detection sensor 15 detects combustible gas, the alarm tube 11 alarms and the fan 28 starts. The fan 28 draws the outside air into the sealing cover 27 and enters the detection ring cover 13 through the ventilation pipe. The air contacts the rotating desiccant 14 to cause the moisture to volatilize, and the air is discharged through the exhaust pipe 122 and the exhaust port 121;

[0094] If the desiccant 14 is slightly affected by humidity, the spring rod 311 can be manually pushed to drive the push plate 312 to push the passive rack plate 25, thereby indirectly rotating the cleaning plate 33 to clean the impurities in the filter screen 16 to ensure detection accuracy;

[0095] The mud cleaning component 3 works: the fan 28 sends the gas into the mud cleaning plate 31 through the cleaning pipe 34 and impacts the surface of the filter screen 16, so that the impurity moisture volatilizes and the impurities in the filter holes are dehumidified. The valve linkage component 2 is started to drive the cleaning plate 33 to rotate and clean the impurities on the surface of the filter screen 16. The impurities fall into the collection cover 32. The cleaning plate 33 is arranged obliquely and the air outlet end of the cleaning pipe 34 is in its forward direction, which can enhance the cleaning effect.

[0096] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A combustible gas alarm, comprising a combustible gas detection body (1), characterized in that; An alarm tube (11) is provided on one side of the combustible gas detection body (1), an air inlet (12) is provided at the bottom of the combustible gas detection body (1), and an exhaust port (121) is provided at the top of the combustible gas detection body (1); The detection ring cover (13) is in a ring-shaped structure and has a conical bottom. It is arranged in the inner cavity of the combustible gas detection body (1) and is used for conveying combustible gas to the outside. A desiccant (14) having a ring-shaped structure and arranged inside the detection ring cover (13) for drying the gas containing moisture; A detection sensor (15), which is arranged on the top of the detection ring cover (13) and is used to detect combustible gas; A filter (16) is disposed above the air inlet (12) and is used to filter gas containing impurities; A valve linkage assembly (2) is arranged inside the detection ring cover (13) and is used to change the passage of the air inlet (12) when the weight of the desiccant (14) increases due to moisture absorption; The mud cleaning component (3) is arranged on the filter screen (16) and is used to automatically clean the impurities in the filter screen (16) under humid conditions.

2. A combustible gas alarm according to claim 1, characterized in that; The valve linkage assembly (2) comprises: A valve disc (20) is in a ring-shaped structure and has a circular hole in the middle thereof. The valve disc (20) is installed below the detection ring cover (13) and is in communication with the detection ring cover (13); A placement rack (21) with an opening facing upwards, for storing a desiccant (14), which can slide up and down on the circular structure of the detection ring cover (13); The number of the air inlet grooves (210) is at least one and they are arranged in a circular array on the placement rack (21) for conveying combustible gas; The spring rod (22) is at least one in number and is installed in an annular array in the inner cavity of the detection ring cover (13); A driving rack plate (23), the number of which is at least one, which is L-shaped, and has gear teeth installed at its vertical end, its horizontal end is fixedly connected to the placement frame (21), and the middle of its horizontal end is slidably connected to the top of the spring rod (22); A transmission gear (24) is mounted on the outer side of the valve disc (20) and meshes with the driving rack plate (23); A passive rack plate (25), the number of which is at least one, and which is connected to the outside of the valve disc (20) through a slide rail, and meshes with the bottom of the transmission gear (24); The driving valve plates (26) are provided in three numbers and are triangular in shape near the central axis of the valve disc (20). The triangular structures of the three driving valve plates (26) can form a complete circular structure when they are completely closed in the valve disc (20).

3. A combustible gas alarm according to claim 2, characterized in that; A sealing cover (27) is installed on the top of the combustible gas detection body (1), and the sealing cover (27) is connected to the exhaust port (121). A plurality of exhaust pipes (122) in a ring array are installed between the sealing cover (27) and the detection ring cover (13). A fan (28) is installed inside the sealing cover (27). A guide ring (29) is installed below the sealing cover (27). The bottom end of the guide ring (29) is set as a protruding cylindrical structure. A ventilation pipe connected to the detection ring cover (13) is installed at the bottom of the cylindrical structure of the guide ring (29). A rotating component (211) is provided on the placement rack (21) for the placement rack (21) to slide down along the detection ring cover (13) under gravity, and the kinetic energy of the sliding movement causes the desiccant (14) to rotate, so that the humidified part of the desiccant (14) can fully contact with the air blown out by the fan (28).

4. A combustible gas alarm according to claim 3, characterized in that; The rotating assembly (211) comprises: A telescopic rod (212) is installed below the placement rack (21) and has a hexagonal structure; A telescopic cylinder (213) slidably connected to the lower side of the telescopic rod (212); There are at least three drive plates (214) installed below the telescopic cylinder (213), and the drive plates (214) are inclined away from the axis direction of the telescopic cylinder (213) and are inclined to the inclined surface direction of the drive valve plate (26); A coil spring (215) mounted on the top of the placement frame (21); The support frame (216) is rotatably connected to the top of the placement frame (21) and is fixedly connected to the telescopic rod (212) via a connecting rod. The other end of the coil spring (215) is fixedly connected to the support frame (216). The desiccant (14) is placed on the top surface of the support frame (216).

5. A combustible gas alarm according to claim 2, characterized in that; The placing rack (21) is provided with a triangular plate (221) between the spaced air inlet grooves (210), a circular hole is provided on the top of the triangular plate (221), an annular plate (222) fixedly connected to the triangular plate (221) is provided on the top of the placing rack (21), a plate-shaped hole is provided on the annular plate (222) close to the axial direction of the placing rack (21), an air expelling pipe (223) is provided on the top of the annular plate (222), and one end of the air expelling pipe (223) away from the triangular plate (221) is connected to the cylindrical structure of the guide ring (29).

6. A combustible gas alarm according to claim 1 or 5, characterized in that; The mud cleaning component (3) comprises: The mud cleaning disc (31) is in the shape of a hollow ring. The mud cleaning disc (31) is installed below the valve disc (20) and is connected to the valve disc (20). The filter screen (16) is plugged and installed in the inner cavity of the mud cleaning disc (31); A collecting cover (32) is hollow and opens upward, is threadedly connected to the bottom of the mud clearing plate (31), and is located in the middle of the air inlet (12); There are six cleaning plates (33), one of which is slid through the filter screen (16) through one end of a connecting rod and is fixedly connected to the telescopic cylinder (213); A cleaning pipe (34) is installed on one side of the guide ring (29) located in the cylindrical structure, one end of the cleaning pipe (34) is connected to the inner side of the mud cleaning disc (31), and the air outlet end of the cleaning pipe (34) is located below the filter screen (16).

7. A combustible gas alarm according to claim 6, characterized in that; The cleaning plate (33) is arranged in an inclined manner below the filter screen (16) and is used to quickly clean the impurities with moisture on the filter screen (16). The air outlet end of the cleaning pipe (34) is located on one side of the inclined portion of the cleaning plate (33) and is arranged in the forward direction of the cleaning plate (33).

8. A combustible gas alarm according to claim 2, characterized in that; An elastic sealing member (231) is installed between the horizontal end of the driving rack plate (23) and one side of the detection ring cover (13), and the elastic sealing member (231) is in a snake-shaped structure.

9. A combustible gas alarm according to claim 7, characterized in that; The air inlet (12) is in a semi-arc-shaped structure, and an air supply pipe for supplying gas to the interior of the mud clearing pan (31) is installed in the air inlet (12), and the air supply pipe is arranged in an inclined manner.

10. A combustible gas alarm according to claim 2, characterized in that; A push spring rod (311) is slidably connected to the middle of the front end of the combustible gas detection body (1); one end of the push spring rod (311) slides through the interior of the combustible gas detection body (1) and is then installed with a push plate (312); one end of the push plate (312) away from the push spring rod (311) corresponds to and is in close contact with one of the passive rack plates (25).

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