Gas detector for fire fighting

Abstract

The utility model discloses a gas detector for fire fighting, and belongs to the technical field of fire fighting equipment. A fire-fighting gas detector comprises a shell internally provided with a cavity, and further comprises an extension pipe fixedly connected to the shell, a detection pipe is arranged on the extension pipe, the two ends of the detection pipe are communicated to form a gas outlet and a gas inlet, the detection pipe is communicated with the extension pipe, and a gas sensor is arranged in the cavity of the shell. The contact end of the gas sensor extends into the extension pipe; the breather pipe is fixedly connected to the detection pipe, the breather pipe is communicated with the detection pipe, and the air inlet end of the breather pipe extends to the position below the detection pipe; according to the utility model, external gas can be guided to the gas sensor more quickly, the response speed of detection of the gas sensor is improved, the alarm can give an alarm quickly, and the response speed of the gas sensor to gas concentration is improved, so that potential danger can be found as early as possible before a fire hazard occurs; and the safety of personnel in the fire fighting access is protected to the greatest extent.

Description

Technical Field

[0001] This utility model relates to the field of fire protection equipment technology, and in particular to a gas detector for fire protection. Background Technology

[0002] Fire escape routes are vital for emergency escape and fire rescue. Before a fire breaks out, there may be gas leaks or combustion gases in fire escape routes. In order to reduce fire risk, it is necessary to monitor the concentration of these gases in real time so that timely measures can be taken to protect lives.

[0003] In the early stages of a gas leak, the leaked gas usually spreads near the source. Current technology typically involves installing gas detectors on the walls of fire escape routes to detect the gas. However, the gas flow rate in the passageway is relatively slow, and the gas may not be able to reach the sensor inside the gas detector quickly. This results in a delay in the detector's response to the gas concentration, making it impossible to issue an alarm in time and posing a risk to subsequent escape and rescue efforts. Utility Model Content

[0004] The purpose of this invention is to solve the problem in the prior art that the gas flow rate in fire escape routes is too slow, which may not be able to reach the sensor in the gas detector quickly, resulting in a delay in the detector's response to gas concentration. Therefore, this invention proposes a gas detector for fire protection.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A fire-fighting gas detector includes a housing with an internal cavity, and further includes: an extension tube fixedly connected to the housing, wherein a detection tube is provided on the extension tube, the two ends of the detection tube are connected to form an outlet and an inlet, and the detection tube is connected to the extension tube; a gas sensor is provided inside the cavity of the housing, and the contact end of the gas sensor extends into the extension tube; and a vent pipe fixedly connected to the detection tube, wherein the vent pipe is connected to the detection tube, and the inlet end of the vent pipe extends to the bottom of the detection tube; and a sealing mechanism is provided on the detection tube for sealing the inlet.

[0007] To facilitate sealing the air outlet, preferably, the sealing mechanism includes a sealing plate, an mounting plate is fixedly connected to the outer wall of the detection tube, an mounting rod is fixedly connected to the mounting plate, the sealing plate is rotatably connected to the mounting rod, and a locking nut is threaded onto the mounting rod, the locking nut abutting against the outer wall of the sealing plate.

[0008] To improve the connection stability of the two sets of sealing plates, the sealing plates are further provided in two sets, arranged in a circle on the detection tube, and magnets are fixedly connected to the two sets of sealing plates respectively.

[0009] To allow outside gas to enter the air inlet, preferably, the detection tube is fixedly connected to a connecting plate, the connecting plate is rotatably connected to a rotating shaft, and a fan blade is fixedly connected to the rotating shaft, with the air outlet of the fan blade facing the air outlet.

[0010] To facilitate the rotation of the shaft, preferably, a connecting shaft is rotatably connected inside the housing, and the connecting shaft extends into the detection tube where a main bevel gear is fixedly connected. An auxiliary bevel gear is provided at the end of the shaft away from the fan blade, and the main bevel gear meshes with the auxiliary bevel gear.

[0011] To facilitate the rotation of the connecting shaft, preferably, a limiting plate is fixedly connected inside the housing, a motor is fixedly connected to the limiting plate, and the connecting shaft is fixedly connected to the output end of the motor.

[0012] Compared with the prior art, this utility model provides a gas detector for fire fighting, which has the following advantages:

[0013] 1. This fire-fighting gas detector uses a rotating shaft to drive the fan blades, creating a pushing effect. The air outlet of the fan blades faces the air outlet, which can accelerate the speed at which outside air enters the detection tube. This allows outside gas to be guided to the gas sensor more quickly, improving the gas sensor's response speed and enabling the alarm to sound quickly. It also improves the gas sensor's response speed to gas concentration, ensuring that potential dangers can be detected as early as possible before a fire occurs, thus maximizing the safety of people in fire escape routes.

[0014] 2. After the air inlet of this fire-fighting gas detector is sealed, the external gas will enter the detection tube through the vent pipe under the action of the fan blade rotation, thereby increasing the detection range of the detection tube and enabling the detection tube to detect the gas in the area below the outer casing, thus improving the practicality of the device.

[0015] The parts of this device not covered herein are the same as or can be implemented using existing technologies. This utility model can guide external gas to the gas sensor more quickly, improve the response speed of the gas sensor, enable the alarm to sound quickly, and improve the response speed of the gas sensor to gas concentration, so as to ensure that potential dangers can be detected as early as possible before a fire occurs, and maximize the safety of people in the fire escape. Attached Figure Description

[0016] Figure 1 A schematic diagram of the isometric structure of a fire-fighting gas detector proposed in this utility model. Figure 1 ;

[0017] Figure 2 A schematic diagram of the isometric structure of a fire-fighting gas detector proposed in this utility model. Figure 2 ;

[0018] Figure 3 This is a cross-sectional structural diagram of the outer shell of a fire-fighting gas detector proposed in this utility model;

[0019] Figure 4 This is a partial structural schematic diagram of a fire-fighting gas detector proposed in this utility model.

[0020] In the diagram: 1. Outer shell; 2. Extension tube; 3. Detection tube; 4. Air outlet; 5. Air inlet; 6. Vent pipe; 7. Gas sensor; 8. Limiting plate; 9. Motor; 10. Connecting shaft; 11. Main bevel gear; 12. Rotating shaft; 13. Connecting plate; 14. Auxiliary bevel gear; 15. Fan blade; 16. Mounting plate; 17. Mounting rod; 18. Sealing plate; 19. Locking nut; 20. Magnet; 21. Fixing plate. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0023] Example:

[0024] Reference Figures 1-4 A fire-fighting gas detector includes a housing 1 with an internal cavity, and an extension tube 2 fixedly connected to the housing 1. The extension tube 2 has a detection tube 3, with its two ends forming an outlet 4 and an inlet 5, and the detection tube 3 is connected to the extension tube 2. A gas sensor 7 is installed inside the cavity of the housing 1, with the contact end of the gas sensor 7 extending into the extension tube 2. A vent pipe 6 is fixedly connected to the detection tube 3, with the vent pipe 6 connected to the detection tube 3 and the inlet end of the vent pipe 6 extending below the detection tube 3. A sealing mechanism is installed on the detection tube 3 to seal the inlet 5.

[0025] A fixing plate 21 is also provided on the outside of the outer casing 1. The fixing plate 21 can be fixed to the wall of the fire passage by expansion bolts or limit bolts. A processing unit, including a microprocessor or microcontroller, is also provided in the cavity of the outer casing 1 for signal processing, data analysis and information output. The gas sensor 7 is electrically connected to the processing unit and is responsible for detecting the external gas. The gas sensor 7 can be an electrochemical sensor. Its principle is to detect the concentration of a specific gas through an electrochemical reaction. The current generated is proportional to the gas concentration. When the detected signal is amplified, filtered and converted into a readable concentration value, it is sent to the processing unit for processing. In addition, an alarm is also provided on the outer casing 1. When the detected gas concentration exceeds the set threshold, the processing unit will activate the alarm switch to make it sound an alarm so as to remind personnel to take appropriate measures.

[0026] In order to increase the gas flow rate of external gas entering the detection tube 3, a connecting plate 13 is fixedly connected to the detection tube 3, a rotating shaft 12 is rotatably connected to the connecting plate 13, and a fan blade 15 is fixedly connected to the rotating shaft 12, with the air outlet surface of the fan blade 15 facing the air outlet 4.

[0027] When the shaft 12 rotates, the fan blades 15 begin to rotate, and air enters the detection tube 3 from the air inlet 5. The rotation of the shaft 12 drives the movement of the fan blades 15, creating a pushing effect. The air outlet of the fan blades 15 faces the air outlet 4, which can accelerate the speed at which outside air enters the detection tube 3, allowing outside gas to be guided to the gas sensor 7 more quickly. This improves the response speed of the gas sensor 7, enabling the alarm to sound quickly and increasing the response speed of the gas sensor 7 to gas concentration. This ensures that potential dangers can be detected as early as possible before a fire occurs, maximizing the safety of people in the fire escape.

[0028] To facilitate the rotation of the rotating shaft 12, a connecting shaft 10 is rotatably connected inside the housing 1. The connecting shaft 10 extends into the detection tube 3 and is fixedly connected to the main bevel gear 11. An auxiliary bevel gear 14 is provided at the end of the rotating shaft 12 away from the fan blade 15. The main bevel gear 11 and the auxiliary bevel gear 14 mesh with each other.

[0029] A limiting plate 8 is fixedly connected inside the outer casing 1. A motor 9 is fixedly connected to the limiting plate 8. A connecting shaft 10 is fixedly connected to the output end of the motor 9.

[0030] When the motor 9 rotates, it will drive the connecting shaft 10 to rotate, which in turn drives the main bevel gear 11 to rotate, which in turn drives the auxiliary bevel gear 14 to rotate, which in turn drives the rotating shaft 12 to rotate, which in turn drives the fan blade 15 to rotate.

[0031] To improve the detection range of the detection tube 3, the air inlet 5 can be blocked by a blocking mechanism. In order to prevent external impurities from entering the interior of the detection tube 3, interception nets are installed on the air outlet 4, the air inlet 5, and the ventilation pipe 6 to intercept and filter impurities. When the blocking mechanism blocks the air inlet 5, external gas will enter the interior of the detection tube 3 through the ventilation pipe 6. It can also partially block the blocking mechanism, so that the ventilation pipe 6 and the air inlet 5 can enter the air simultaneously.

[0032] Furthermore, the aforementioned sealing mechanism includes a sealing plate 18, an mounting plate 16 fixedly connected to the outer wall of the detection tube 3, an mounting rod 17 fixedly connected to the mounting plate 16, a sealing plate 18 rotatably connected to the mounting rod 17, and a locking nut 19 threadedly connected to the mounting rod 17, the locking nut 19 abutting against the outer wall of the sealing plate 18.

[0033] Two sets of sealing plates 18 are provided and arranged in a circle on the detection tube 3. Magnets 20 are fixedly connected to the two sets of sealing plates 18 respectively.

[0034] When it is necessary to completely block the air inlet 5, the locking nut 19 can be rotated counterclockwise to separate the locking nut 19 from the outer wall of the sealing plate 18. Then, the two sets of sealing plates 18 are rotated to make the magnets 20 on the two sets of sealing plates 18 magnetically attract each other. At this time, the two sets of sealing plates 18 are connected together to block the air inlet 5. Then, the locking nut 19 is rotated clockwise to make the locking nut 19 abut against the sealing plate 18, thereby achieving the function of blocking the air inlet 5. After the blocking is completed, under the action of the fan blade 15 rotation, the outside gas will enter the detection tube 3 through the ventilation pipe 6, thereby increasing the detection range of the detection tube 3 and enabling the detection tube 3 to detect the gas in the area below the outer casing 1, thus improving the practicality of the device.

[0035] When it is necessary to partially block the air inlet 5, the locking nut 19 can be turned counterclockwise to separate the locking nut 19 from the outer wall of the sealing plate 18. Then, the two sets of sealing plates 18 can be rotated, but a certain gap can be left between the two sets of sealing plates 18 as needed. Then, the locking nut 19 can be turned clockwise to make the locking nut 19 abut against the sealing plate 18. At this time, the air intake flow of the air inlet 5 will decrease, and the vent pipe 6 located below the detection pipe 3 will be siphoned to allow air to enter, so that it can also detect part of the gas in the area below the outer casing 1.

[0036] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A fire-fighting gas detector, comprising a shell (1) with an internal cavity, characterized in that, Also includes: An extension tube (2) is fixedly connected to the outer casing (1). Among them, the extension tube (2) is provided with a detection tube (3), the two ends of the detection tube (3) are connected to form an air outlet (4) and an air inlet (5), and the detection tube (3) is connected to the extension tube (2). A gas sensor (7) is provided in the cavity of the outer shell (1), and the contact end of the gas sensor (7) extends into the extension tube (2). A vent pipe (6) is fixedly connected to the detection tube (3). The ventilation pipe (6) is connected to the detection pipe (3), and the air inlet end of the ventilation pipe (6) extends to the bottom of the detection pipe (3). The detection pipe (3) is provided with a sealing mechanism for sealing the air inlet (5).

2. The fire-fighting gas detector according to claim 1, characterized in that, The sealing mechanism includes a sealing plate (18), an mounting plate (16) is fixedly connected to the outer wall of the detection tube (3), an mounting rod (17) is fixedly connected to the mounting plate (16), the sealing plate (18) is rotatably connected to the mounting rod (17), a locking nut (19) is threadedly connected to the mounting rod (17), and the locking nut (19) abuts against the outer wall of the sealing plate (18).

3. A fire-fighting gas detector according to claim 2, characterized in that, The sealing plate (18) is provided in two sets and is arranged in a circle on the detection tube (3). Magnets (20) are fixedly connected to the two sets of sealing plates (18).

4. A fire-fighting gas detector according to claim 1, characterized in that, The detection tube (3) is fixedly connected to a connecting plate (13), and a rotating shaft (12) is rotatably connected to the connecting plate (13). A fan blade (15) is fixedly connected to the rotating shaft (12), and the air outlet of the fan blade (15) faces the air outlet (4).

5. A fire-fighting gas detector according to claim 4, characterized in that, The outer casing (1) is rotatably connected to a connecting shaft (10), the connecting shaft (10) extends into the detection tube (3) and is fixedly connected to a main bevel gear (11), and an auxiliary bevel gear (14) is provided at one end of the rotating shaft (12) away from the fan blade (15), and the main bevel gear (11) meshes with the auxiliary bevel gear (14).

6. A fire-fighting gas detector according to claim 5, characterized in that, A limiting plate (8) is fixedly connected inside the outer shell (1), and a motor (9) is fixedly connected on the limiting plate (8). The connecting shaft (10) is fixedly connected to the output end of the motor (9).

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