Limited space gas alarm device

Abstract

The utility model discloses a gas alarm device in a limited space, which relates to the technical field of environment monitoring and comprises a main board, a plurality of bolts are arranged on the surface of the main board, sleeves are fixedly mounted on the surface of the main board corresponding to the bolts, a fixing frame and a gas storage tank are fixedly mounted on the inner wall of each sleeve, and the fixing frame and the gas storage tank are horizontally distributed along the axis direction of each sleeve. A filter plate is fixedly installed on the end face, close to the gas storage tank, of the sleeve, filter holes are formed in the surface of the filter plate in a penetrating mode, an alarm lamp is fixedly installed on the surface, corresponding to the sleeve, of the main board, the alarm lamp is in telecommunication connection with the sleeve through a wire, a rotating shaft is rotationally installed on the side, away from the gas storage tank, of the fixing frame, and blades are fixedly installed on the outer surface of the rotating shaft. The filtering holes prevent dust from statically entering the sleeve, so that gas in the sleeve does not contain dust, the sensor and the oxygen detector do not make contact with the dust, the detection accuracy of the sensor is improved, meanwhile, electronic components can be prevented from making direct contact with the dust, and the equipment damage probability is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of environmental monitoring, and specifically relates to a gas alarm device for confined spaces. Background Technique

[0002] A confined space refers to a space that is enclosed or partially enclosed, relatively isolated from the outside world, has a relatively narrow entrance and exit, where workers cannot work inside for a long time, has poor natural ventilation, and is prone to the accumulation of toxic, harmful, flammable and explosive substances or insufficient oxygen content. A confined space needs to meet the following four conditions at the same time: 1. Not designed as a fixed workplace; 2. The entrances and exits are limited or restricted; 3. Prone to the accumulation of toxic, harmful, flammable and explosive substances or insufficient oxygen content; 4. There is a possibility and need for personnel to enter.

[0003] Confined spaces involve a very wide range of industries, including but not limited to mines, hazardous chemicals, oil refining, metallurgy, construction, electricity, paper making, shipbuilding, building materials, catering, food processing, municipal engineering, environmental protection engineering, urban gas, sewage treatment, special equipment, communication construction, livestock breeding, etc.

[0004] The confined spaces in mines refer to the space environments in mine operations that are enclosed or partially enclosed, relatively isolated from the outside world, have relatively narrow entrances and exits, and have poor natural ventilation. These spaces are usually not designed as fixed workplaces, and there is a possibility and need for personnel to enter. In the confined spaces of mines, due to poor ventilation, it is easy to cause the accumulation of toxic and harmful gases or insufficient oxygen content, thus increasing the safety risks such as suffocation and poisoning of workers.

[0005] The existing technology has the following problems: Generally, the gas alarm device directly places the sensor in the external space and uses the sensor to directly contact the gas to achieve the purpose of real-time detection of the content of dangerous gases in the air. Since there is a large amount of dust in the air and the dust directly contacts the sensor, the accuracy of the sensor detection is reduced; at the same time, the sensors are all electronic components, and the dust directly contacts the electronic components, increasing the probability of sensor failure. Summary of the Utility Model

[0006] To solve the above technical problems, a gas alarm device for confined spaces is provided, which solves the problems of low accuracy of current sensor detection and high probability of sensor failure.

[0007] To achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0008] A gas alarm device for confined spaces, comprising a main board, on the surface of which there are multiple bolts, and corresponding to the bolts, sleeves are fixedly installed on the surface of the main board. Inside the sleeves, a fixing frame and a gas storage tank are fixedly installed. The fixing frame and the gas storage tank are horizontally distributed along the axis of the sleeve. At the end face of the sleeve close to the gas storage tank, a filter plate is fixedly installed, and filter holes are penetrated through the surface of the filter plate.

[0009] Preferably, an alarm lamp is fixedly installed on the surface of the main board corresponding to the sleeve, and the alarm lamp is electrically connected to the sleeve through an electric wire.

[0010] Preferably, a rotating shaft is rotatably installed on the side of the fixing frame away from the gas storage tank, and blades are fixedly installed on the outer surface of the rotating shaft.

[0011] Preferably, ventilation grooves are penetrated through the inner wall of the sleeve corresponding to the blades, and filter meshes are fixedly installed on the inner walls of the ventilation grooves.

[0012] Preferably, a motor is arranged on the side of the fixing frame close to the gas storage tank, and the rotating shaft penetrates through the fixing frame and is fixedly connected to the output end of the motor.

[0013] Preferably, a rubber plate is fixedly installed on the side of the main board away from the sleeve.

[0014] Preferably, a plurality of air outlet pipes are fixedly installed on the inner wall of the gas storage tank. The plurality of air outlet pipes are circumferentially distributed around the center line of the gas storage tank, and the air outlet pipes are communicated with the gas storage tank.

[0015] Preferably, the diameter of the filter holes is 5 - 50 μm.

[0016] Preferably, the material of the filter plate is ceramic.

[0017] Compared with the prior art, the advantages of the present utility model are as follows: by setting filter holes with a diameter of 5 - 50 μm, this range can effectively block most dust particles in the air. Since the diameters of most dust particles are greater than or close to this range, they cannot enter the inside of the sleeve through these filter holes. By setting such filter holes, the risk of damage to electronic components caused by dust can be greatly reduced, thereby reducing the probability of equipment damage; at the same time, after being filtered by the filter holes, the gas inside the sleeve does not contain dust, and the sensor and the oxygen detector do not come into contact with dust, improving the detection accuracy of the sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the present utility model;

[0019] Figure 2 is a cross-sectional view of some parts of the present utility model;

[0020] Figure 3 For Figure 2 The partial enlarged view of A in

[0021] The reference numerals in the figure are as follows:

[0022] 1. Main board; 2. Bolt; 3. Sleeve; 4. Fixing bracket; 5. Gas storage tank; 6. Filter plate; 7. Filter hole; 8. Alarm lamp; 9. Electric wire; 10. Rotating shaft; 11. Blade; 12. Ventilation groove; 13. Filter net; 14. Motor; 15. Rubber plate; 16. Air outlet pipe. Specific implementation mode

[0023] The following description is used to disclose the present utility model so that those skilled in the art can implement the present utility model. The preferred embodiments in the following description are only examples, and those skilled in the art can think of other obvious variants.

[0024] Referring to Figures 1-3 As shown in the figure, a gas alarm device for a confined space includes a main board 1. A plurality of bolts 2 are provided on the surface of the main board 1. The main board 1 is fixed to the wall through the bolts 2. A sleeve 3 is fixedly installed on the surface of the main board 1 corresponding to the bolts 2. A plurality of sensors are fixedly installed on the inner wall of the sleeve 3 corresponding to the main board 1. The plurality of sensors are circumferentially distributed around the center line of the sleeve 3. The plurality of sensors respectively detect the components in the gas entering the sleeve 3. A fixing bracket 4 and a gas storage tank 5 are fixedly installed on the inner wall of the sleeve 3. The fixing bracket 4 and the gas storage tank 5 are horizontally distributed along the axis direction of the sleeve 3. A plurality of oxygen detectors are fixedly installed on the side of the fixing bracket 4 close to the gas storage tank 5. The plurality of oxygen detectors are circumferentially distributed around the center line of the fixing bracket 4. Oxygen is stored in the gas storage tank 5 and released when needed. A filter plate 6 is fixedly installed on the end face of the sleeve 3 close to the gas storage tank 5. Filter holes 7 are formed through the surface of the filter plate 6. The filter holes 7 prevent impurities in the air from entering the sleeve 3 and directly contacting the electronic components, reducing the probability of equipment damage.

[0025] As shown in the figure, an alarm lamp 8 is fixedly installed on the surface of the main board 1 corresponding to the sleeve 3. The alarm lamp 8 is electrically connected to the sleeve 3 through an electric wire 9. When the sensors detect that the content of one or more dangerous gases is too high, an electric signal is transmitted to the alarm lamp 8 through the electric wire 9. The alarm lamp 8 emits a red light and makes a sound at the same time to remind the staff to leave.

[0026] As shown in the figure, a rotating shaft 10 is rotatably installed on the side of the fixing bracket 4 away from the gas storage tank 5. Blades 11 are fixedly installed on the outer surface of the rotating shaft 10. The rotating shaft 10 drives the blades 11 to rotate at a high speed, continuously replacing the external air with the internal air, so that the device can detect the external gas in real time.

[0027] As shown in the figure, an air vent groove 12 is penetrated and opened on the inner wall of the sleeve 3 corresponding to the blade 11. A filter screen 13 is fixedly installed on the inner wall of the air vent groove 12, and the internal air flow leaves the device through the air vent groove 12.

[0028] As shown in the figure, a motor 14 is provided on one side of the fixing frame 4 close to the air storage tank 5. The rotating shaft 10 penetrates through the fixing frame 4 and is fixedly connected to the output end of the motor 14. The motor 14 serves as the power source of the rotating shaft 10.

[0029] As shown in the figure, a rubber plate 15 is fixedly installed on one side of the main board 1 away from the sleeve 3. The rubber plate 15 enables the main board 1 to adapt to a variety of different walls.

[0030] As shown in the figure, a plurality of air outlet pipes 16 are fixedly installed on the inner wall of the air storage tank 5. The plurality of air outlet pipes 16 are circumferentially distributed around the center line of the air storage tank 5. The air outlet pipes 16 are communicated with the air storage tank 5. A valve is provided in the air outlet pipes 16. When the oxygen content in the external air is low, the oxygen detector controls the opening size of the valve, so that the oxygen in the air storage tank 5 enters the sleeve 3 through the air outlet pipes 16, enabling other sensors to work normally, and at the same time transmitting the signal to the alarm lamp 8 through the electric wire 9.

[0031] As shown in the figure, the diameter of the filter holes 7 is 5 - 50 μm. When the dust particle size is larger than the mesh or pore diameter, or when the dust deposits in the interstices between the filter media particles, the dust is retained.

[0032] As shown in the figure, the filter plate 6 is made of ceramic. Ceramic materials are a type of inorganic non-metallic materials with a variety of remarkable advantages: 1. Ceramic materials usually have extremely high melting points, mostly above 2000 °C, which enables them to remain stable in high-temperature environments; 2. Ceramic materials have very high hardness, mostly above 1500 HV, and excellent wear resistance; 3. Ceramic materials have good corrosion resistance to chemical substances such as acids, alkalis, and salts, and excellent oxidation resistance, and can be used for a long time in harsh environments; 4. Good insulation: Most ceramic materials have good insulation.

[0033] Working principle: After the staff installs the device in a suitable position, the motor 14 drives the blades 11 on the rotating shaft 10 to rotate at a high speed. External air enters the sleeve 3 through the filter holes 7. The filter holes 7 on the filter plate 6 filter the air entering the sleeve 3. When the filtered gas passes through the oxygen detector on the fixing frame 4, the oxygen detector detects the oxygen content in the corresponding gas: 1. When the oxygen content is normal, the filtered gas passes through the fixing frame 4 and is detected by multiple sensors. When the content of harmful gases in the gas is higher than the safety standard, the sensors transmit electrical signals through the wire 9 to the alarm lamp 8. The alarm lamp 8 emits a red light and makes a sound at the same time, reminding the staff to leave. At the same time, the gas leaves the device through the ventilation groove 12 and the filter net 13; 2. When the oxygen content is low, the oxygen detector controls the opening size of the valve, so that the oxygen in the gas storage tank 5 enters the sleeve 3 through the air outlet pipe 16, enabling other sensors to work normally. At the same time, the signal is transmitted through the wire 9 to the alarm lamp 8. The alarm lamp 8 emits a red light and makes a sound at the same time, reminding the staff to leave.

[0034] The above shows and describes the basic principle, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection required by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A confined space gas alarm device, comprising a main board (1), a surface of the main board (1) is provided with a plurality of bolts (2), a sleeve (3) is fixedly mounted on the surface of the main board (1) corresponding to the bolts (2), a fixing frame (4) and a gas storage tank (5) are fixedly mounted on the inner wall of the sleeve (3), the fixing frame (4) and the gas storage tank (5) are horizontally distributed along the axial direction of the sleeve (3), a filter plate (6) is fixedly mounted on the end surface of the sleeve (3) close to the gas storage tank (5), and a filter hole (7) is opened through the surface of the filter plate (6).

2. A confined space gas alarm device according to claim 1, characterized in that: An alarm light (8) is fixedly mounted on the surface of the main board (1) corresponding to the sleeve (3), and the alarm light (8) is connected to the sleeve (3) via an electric wire (9).

3. A confined space gas alarm device according to claim 1, characterized in that: A rotating shaft (10) is rotatably mounted on a side of the fixed frame (4) away from the gas storage tank (5), and blades (11) are fixedly mounted on the outer surface of the rotating shaft (10).

4. A confined space gas alarm device according to claim 3, characterized in that: A ventilation groove (12) is provided through the inner wall of the sleeve (3) corresponding to the blade (11), and a filter screen (13) is fixedly installed on the inner wall of the ventilation groove (12).

5. A confined space gas alarm device according to claim 3, characterized in that: A motor (14) is provided on one side of the fixing frame (4) close to the gas storage tank (5), and the rotating shaft (10) passes through the fixing frame (4) and is fixedly connected to the output end of the motor (14).

6. A confined space gas alarm device according to claim 1, characterized in that: A rubber plate (15) is fixedly mounted on a side of the main board (1) away from the sleeve (3).

7. A confined space gas alarm device according to claim 1, characterized in that: A plurality of air outlet pipes (16) are fixedly mounted on the inner wall of the air storage tank (5), the plurality of air outlet pipes (16) are distributed circumferentially around the center line of the air storage tank (5), and the air outlet pipes (16) are in communication with the air storage tank (5).

8. A confined space gas alarm device according to claim 1, characterized in that: The diameter of the filter hole (7) is 5 to 50 μm.

9. A confined space gas alarm device according to claim 1, characterized in that: The filter plate (6) is made of ceramic.

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