A composite fire extinguishing agent concentration detector

Abstract

The present invention relates to the field of fire protection technology, and specifically relates to a composite fire extinguishing agent concentration detector, which includes: a housing, the front end of the housing is rotatably installed with a door panel through a hinge, an observation window is arranged at the upper end of the door panel, an air inlet is arranged at the lower end of the housing, an air outlet pipe is fixedly installed at the upper end, the lower end of the air outlet pipe is communicated with the inner end of the housing, a fixing component is installed at the rear end of the housing, a fire extinguishing agent concentration detector is fixedly installed on the upper side of the inner end of the housing, and an air supply component is fixedly installed on the lower side of the inner end of the housing. The air supply component includes a cylinder, and the cylinder is installed on the inner wall of the housing through a second fixing plate; the beneficial effect is that the arc-shaped plate is adsorbed on the outer wall of the composite fire extinguishing agent storage tank through a magnet, so as to fix the housing on the outer wall of the composite fire extinguishing agent storage tank, playing a role of simple and rapid installation. When it is necessary to detect the composite fire extinguishing agent storage tank, it can be directly adsorbed on the tank body, and when it is not necessary to detect, it can be directly removed, and the operation is simple and convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of fire protection, and particularly to a composite fire extinguishing agent concentration detector. Background Art

[0002] A gas fire extinguishing agent is a fire extinguishing agent that extinguishes fires in a gaseous state. The following problems still exist in the existing technical solutions during use: Since the overall height of the device is relatively high, the position of the control panel is also relatively high, and it is inconvenient to adjust the control panel according to the height of the user; Since the storage tank is large in volume and heavy, it is inconvenient to place it at the bottom of the detection mechanism for detection; The detection mechanism will be damaged after long-term use, and it is inconvenient to disassemble and repair the detection mechanism according to needs; Therefore, improvements need to be made to the above problems.

[0003] Chinese Patent CN220137101U discloses a gas fire extinguishing agent concentration testing device, including a base. A first driving motor is installed inside the base. A first lead screw is connected to one side of the first driving motor. A limiting rod is arranged on one side of the first lead screw. A positioning placement frame is connected to the outside of the limiting rod. A fire extinguishing agent storage tank is arranged inside the positioning placement frame. A protective frame is connected above the base. A controller is installed on the side of the protective frame.

[0004] However, the above solution has a complex structure and is troublesome to install. It is inconvenient to quickly install the detector on the surface of the tank body, and it is inconvenient to use. For this reason, the present invention proposes a composite fire extinguishing agent concentration detector to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a composite fire extinguishing agent concentration detector to solve the problems in the above background art that the existing fire extinguishing agent concentration detector has a complex installation structure, is troublesome to install, is inconvenient to quickly install the detector on the surface of the tank body, and is inconvenient to use.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A composite fire extinguishing agent concentration detector, including: a housing. A door panel is rotatably installed at the front end of the housing through a hinge. An observation window is arranged at the upper end of the door panel. An air inlet is arranged at the lower end of the housing. An air outlet pipe is fixedly installed at the upper end. The lower end of the air outlet pipe is communicated with the inner end of the housing. A fixing component is installed at the rear end of the housing;

[0007] A fire extinguisher concentration detector is fixedly installed on the upper side of the inner end of the housing. A air supply component is fixedly installed on the lower side of the inner end of the housing;

[0008] The air supply component includes a cylinder, which is installed on the inner wall of the housing through the second fixing plate. The inner end of the cylinder is rotatably connected with a fan blade assembly through a motor. The inner side of the upper end of the cylinder is rotatably connected with a flow disturbance assembly. The outer side of the upper end of the cylinder is installed with a wind guide cylinder through a threaded cylinder. The upper end of the wind guide cylinder is fixedly installed with an air outlet cylinder, and the air outlet cylinder is located at the lower end of the fire extinguisher concentration detector.

[0009] Preferably, the fixing component includes reinforcing plates. There are two reinforcing plates, which are respectively fixedly installed on the upper and lower sides of the rear end of the housing. The front and rear ends of each reinforcing plate are fixedly installed with fixing rods. The outer ends of the fixing rods are fixedly installed with arc-shaped plates, and the inner ends of the arc-shaped plates are fixedly installed with arc-shaped magnets.

[0010] Preferably, a hoop is fixedly installed on the outer end of the fire extinguisher concentration detector through bolts. Round rods are fixedly installed at both the left and right ends of the hoop. One side of the round rod away from the hoop is fixedly installed with a first fixing plate, and the first fixing plate fits on the inner wall of the housing and is fixed by bolts.

[0011] Preferably, the air outlet pipe is L-shaped. An alarm is fixedly installed on the upper end of the housing, and the alarm is electrically connected to the fire extinguisher concentration detector.

[0012] Preferably, the second fixing plate is L-shaped. One end of the second fixing plate is fixedly welded to the outer wall of the cylinder, and the other end of the second fixing plate is fixed to the inner wall of the housing through bolts.

[0013] Preferably, a retaining ring is fixedly installed on the inner side of the upper end of the cylinder. Sound-absorbing cotton is arranged at the inner end of the cylinder. The sound-absorbing cotton is annular. The outer end of the sound-absorbing cotton is fixedly installed with an annular plastic plate. A number of sound-absorbing holes are evenly opened at the inner end of the sound-absorbing cotton. The plastic plate is inserted into the inner end of the cylinder and contacts the inner wall of the cylinder. When the inner end of the plastic plate contacts the retaining ring, the outer end of the plastic plate is flush with the lower end of the cylinder.

[0014] Preferably, the outer wall of the lower end of the cylinder is provided with a first external thread, and the outer wall of the upper end is provided with a second external thread. A threaded hole is opened on one side of the lower end of the cylinder. The lower end of the cylinder is threadedly connected with a threaded cover through the first external thread. A circular hole is opened on the side wall of one end of the threaded cover, and an air inlet hole is opened at the inner end of the threaded cover. A number of support rods are evenly and fixedly installed at the inner end of the air inlet hole. The lower end of the motor is fixedly installed on the upper end of the support rods, and the output end of the motor is fixedly connected with the fan blade assembly.

[0015] Preferably, when the threaded cover is screwed onto the lower end of the cylinder, the circular hole is communicated with the threaded hole. A fixing bolt is inserted into the circular hole, and the front end of the fixing bolt passes through the circular hole and is threadedly connected with the inner wall of the threaded hole. At the same time, the fan blade assembly is located at the inner end of the cylinder, and the inner wall of the threaded cover contacts the outer end of the plastic plate.

[0016] Preferably, the flow disturbing component includes a bearing. The outer wall of the bearing is fixedly connected to the inner wall of the upper end of the cylinder. A rotating ring is fixedly installed on the inner wall of the bearing. A connecting block is arranged at the inner end of the rotating ring. A plurality of arc-shaped blades are evenly and obliquely installed between the rotating ring and the connecting block. The arc-shaped blades are located at the lower end of the fan blade assembly.

[0017] Preferably, the air guide cylinder is in the shape of a hollow frustum. The end with a smaller inner diameter of the air guide cylinder is fixedly connected to one end of the threaded cylinder. The end with a larger inner diameter of the air guide cylinder is fixedly connected to one end of the air outlet cylinder. The threaded cylinder is threadedly connected to the outer side of the upper end of the cylinder through an external thread II.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] By turning on the motor, the motor drives the fan blade assembly to rotate. When the fan blade assembly rotates, it blows air towards the upper end of the cylinder. The air blown upwards by the fan blade assembly can drive the arc-shaped blades to rotate after passing through the arc-shaped blades. When the arc-shaped blades rotate, they can disrupt and mix the air flow entering the housing. Then, the air guide cylinder and the air outlet cylinder conduct and transport the air flow disturbed by the flow disturbing component, accurately pass through the lower end of the fire extinguisher concentration detector, and are discharged from the air outlet pipe after being detected by the fire extinguisher concentration detector, reducing the air pressure at the lower end of the housing. The gas near the composite fire extinguishing agent storage tank will enter the housing, thereby completing the detection of the gas around the composite fire extinguishing agent storage tank, and thus knowing whether the composite fire extinguishing agent storage tank leaks;

[0020] When it is necessary to replace the sound-absorbing cotton or repair the motor and the fan blade assembly, unscrew the threaded cover from the lower end of the cylinder, and then the sound-absorbing cotton can be replaced or the motor and the fan blade assembly can be repaired. The operation is simple and convenient;

[0021] The arc-shaped plate is adsorbed on the outer wall of the composite fire extinguishing agent storage tank through a magnet, thereby fixing the housing on the outer wall of the composite fire extinguishing agent storage tank, playing a role of simple and rapid installation. When it is necessary to detect the composite fire extinguishing agent storage tank, directly adsorb it on the tank body, and when detection is not required, directly remove it. The operation is simple and convenient. Description of the Drawings

[0022] Figure 1 It is a front view of the overall structure of the present invention;

[0023] Figure 2 It is a bottom view of the overall structure of the present invention;

[0024] Figure 3 It is a schematic diagram of the internal structure of the housing of the present invention;

[0025] Figure 4 It is a schematic diagram of the structure of the fixing component of the present invention;

[0026] Figure 5Schematic diagram of the air supply component structure of the present invention;

[0027] Figure 6 Schematic diagram of the first unfolded structure of the air supply component of the present invention;

[0028] Figure 7 Schematic diagram of the second unfolded structure of the air supply component of the present invention;

[0029] Figure 8 Schematic diagram of the structure of the retaining ring located at the outer end of the cylinder of the present invention.

[0030] In the figure: 1. Outer shell; 2. Door panel; 3. Observation window; 4. Air outlet pipe; 5. Air inlet; 6. Reinforcing plate; 7. Fixed rod; 8. Arc plate; 9. Arc magnet; 10. Fire extinguishing agent concentration detector; 11. Hoop; 12. Round rod; 13. First fixing plate; 14. Alarm; 15. Cylinder; 16. Second fixing plate; 17. First external thread; 18. Thread hole; 19. Thread cover; 20. Air inlet hole; 21. Round hole; 22. Fixed bolt; 23. Fan blade assembly; 24. Threaded cylinder; 25. Air guide cylinder; 26. Air outlet cylinder; 27. Bearing; 28. Rotating ring; 29. Arc blade; 30. Connecting block; 31. Sound-absorbing cotton; 32. Plastic plate; 33. Sound-absorbing hole; 34. Second external thread; 35. Retaining ring; 36. Motor; 37. Support rod. Detailed implementation manners

[0031] In order to clearly and completely describe the purpose, technical solution of the present invention, and make the advantages more clear and understandable, the following further details the embodiments of the present invention with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to explain the embodiments of the present invention, not to limit the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0032] Please refer to Figures 1 to 8 , the present invention provides a technical solution: a composite fire extinguishing agent concentration detector, including: an outer shell 1, the front end of the outer shell 1 is rotatably installed with a door panel 2 through a hinge, one end of the door panel 2 away from the hinge is connected to the outer shell 1 through a door lock, which is convenient for opening and closing the door panel 2, an observation window 3 is arranged at the upper end of the door panel 2, and the observation window 3 is made of transparent tempered glass, which is convenient for observing the fire extinguishing agent concentration detector 10 inside the outer shell 1, an air inlet 5 is arranged at the lower end of the outer shell 1, and an air outlet pipe 4 is fixedly installed at the upper end, the lower end of the air outlet pipe 4 is communicated with the inner end of the outer shell 1, the air outlet pipe 4 is in an L shape, and the outer end of the air outlet pipe 4 is away from the outer shell 1. When the fire extinguishing agent concentration detector is working, the gas to be detected enters the inner end of the outer shell 1 through the air inlet 5, and after being detected by the fire extinguishing agent concentration detector 10, it is discharged from the air outlet pipe 4.

[0033] A fixing component is installed at the rear end of the outer shell 1 and is adsorbed on the outer wall of the composite fire extinguishing agent storage tank through the fixing component. The fixing component includes reinforcing plates 6. There are two reinforcing plates 6, and the two reinforcing plates 6 are respectively fixedly installed on the upper and lower sides at the rear end of the outer shell 1. Fixed rods 7 are fixedly installed at the front and rear ends of each reinforcing plate 6. The reinforcing plates 6 increase the contact area between the fixed rods 7 and the outer shell 1, strengthening the rear end of the outer shell 1. An arc-shaped plate 8 is fixedly installed at the outer end of the fixed rod 7. The two arc-shaped plates 8 are bent upwards and downwards to facilitate fitting on the outer wall of the composite fire extinguishing agent storage tank. An arc-shaped magnet 9 is fixedly installed at the inner end of the arc-shaped plate 8. The arc-shaped plate 8 is adsorbed on the outer wall of the composite fire extinguishing agent storage tank through the arc-shaped magnet 9, thereby fixing the outer shell 1 on the outer wall of the composite fire extinguishing agent storage tank, playing the role of simple and rapid installation. When it is necessary to detect the composite fire extinguishing agent storage tank, it can be directly adsorbed on the tank body, and it can be directly removed when not in detection.

[0034] A fire extinguisher concentration detector 10 is fixedly installed on the upper side at the inner end of the outer shell 1. An alarm 14 is fixedly installed at the upper end of the outer shell 1. The alarm 14 is electrically connected to the fire extinguisher concentration detector 10. After the concentration detected by the fire extinguisher concentration detector 10 is greater than the set value, the alarm 14 issues an alarm to notify the staff. A hoop 11 is fixedly installed at the outer end of the fire extinguisher concentration detector 10 through bolts. Round rods 12 are fixedly installed at the left and right ends of the hoop 11. A first fixing plate 13 is fixedly installed on the side of the round rod 12 away from the hoop 11. The first fixing plate 13 fits on the inner wall of the outer shell 1 and is fixed by bolts, fixing the fire extinguisher concentration detector 10, playing the role of convenient disassembly and assembly.

[0035] An air supply component is fixedly installed on the lower side at the inner end of the outer shell 1. The air supply component includes a cylinder 15. The cylinder 15 is installed on the inner wall of the outer shell 1 through a second fixing plate 16. The second fixing plate 16 is L-shaped. One end of the second fixing plate 16 is fixedly welded to the outer wall of the cylinder 15. A bolt hole is opened at the other end of the second fixing plate 16 and it fits on the inner wall of the outer shell 1. Bolts pass through the bolt hole and are threadedly connected to the inner wall of the outer shell 1 to fix the cylinder 15, playing the role of facilitating the disassembly and assembly of the cylinder 15.

[0036] A fan blade assembly 23 is rotationally connected to the inner end of the cylinder 15 through a motor 36. The output end of the motor 36 is fixedly connected to the fan blade assembly 23. The motor 36 drives the fan blade assembly 23 to rotate. When the fan blade assembly 23 rotates, it blows air towards the upper end of the cylinder 15. The blown air passes through the fire extinguisher concentration detector 10 and then is discharged from the air outlet pipe 4, reducing the air pressure at the lower end of the outer shell 1. The gas near the composite fire extinguishing agent storage tank will enter the outer shell 1, thereby completing the detection of the gas around the composite fire extinguishing agent storage tank and knowing whether the composite fire extinguishing agent storage tank is leaking.

[0037] A retaining ring 35 is fixedly installed on the inner side of the upper end of the cylinder 15. A sound-absorbing cotton 31 is arranged at the inner end of the cylinder 15. The sound-absorbing cotton 31 is in a circular ring shape. An annular plastic plate 32 is fixedly installed at the outer end of the sound-absorbing cotton 31. A plurality of sound-absorbing holes 33 are evenly formed at the inner end of the sound-absorbing cotton 31. The plastic plate 32 is inserted into the inner end of the cylinder 15 and contacts the inner wall of the cylinder 15. When the inner end of the plastic plate 32 contacts the retaining ring 35, the outer end of the plastic plate 32 is flush with the lower end of the cylinder 15. The sound-absorbing cotton 31 can absorb the noise generated when the motor 36 and the fan blade assembly 23 rotate, reducing the noise generated during operation.

[0038] External threads one 17 are formed on the outer wall of the lower end of the cylinder 15, and external threads two 34 are formed on the outer wall of the upper end. A threaded hole 18 is formed on one side of the lower end of the cylinder 15. The lower end of the cylinder 15 is threadedly connected with a threaded cover 19 through the external threads one 17. A round hole 21 is formed on the side wall of one end of the threaded cover 19. An air inlet hole 20 is formed at the inner end of the threaded cover 19. The arrangement of the air inlet hole 20 allows air to pass through the threaded cover 19 and enter the inner end of the housing 1. A plurality of support rods 37 are evenly and fixedly installed at the inner end of the air inlet hole 20. The lower end of the motor 36 is fixedly installed on the upper ends of the support rods 37 to fix the motor 36. When the threaded cover 19 is screwed onto the lower end of the cylinder 15, the round hole 21 communicates with the threaded hole 18. A fixing bolt 22 is inserted into the round hole 21. The front end of the fixing bolt 22 passes through the round hole 21 and is threadedly connected with the inner wall of the threaded hole 18 to further fix the threaded cover 19, preventing the vibration generated when the motor 36 operates from affecting the threaded cover 19 and preventing the threaded cover 19 from vibrating off the cylinder 15. At the same time, the fan blade assembly 23 is located inside the cylinder 15, and the inner wall of the threaded cover 19 contacts the outer end of the plastic plate 32 to fix the plastic plate 32 and the sound-absorbing cotton 31. When it is necessary to replace the sound-absorbing cotton 31 or repair the motor 36 and the fan blade assembly 23, the threaded cover 19 is screwed off from the lower end of the cylinder 15, and then the sound-absorbing cotton 31 can be replaced or the motor 36 and the fan blade assembly 23 can be repaired. The operation is simple and convenient.

[0039] Specifically, when it is necessary to detect the concentration outside the composite fire extinguishing agent storage tank, the arc-shaped plate 8 is adsorbed on the outer wall of the composite fire extinguishing agent storage tank through the arc-shaped magnet 9, thereby fixing the housing 1 on the outer wall of the composite fire extinguishing agent storage tank. Then the motor 36 is started, and the motor 36 drives the fan blade assembly 23 to rotate. When the fan blade assembly 23 rotates, it blows air towards the upper end of the cylinder 15. The blown air passes through the lower end of the fire extinguisher concentration detector 10 and is discharged from the air outlet pipe 4 after being detected by the fire extinguisher concentration detector 10, reducing the air pressure at the lower end of the housing 1. The gas near the composite fire extinguishing agent storage tank will enter the housing 1, thereby completing the detection of the gas around the composite fire extinguishing agent storage tank and knowing whether the composite fire extinguishing agent storage tank is leaking.

[0040] A spoiler assembly is rotatably connected to the inner side of the upper end of the cylinder 15. The spoiler assembly includes a bearing 27. The outer wall of the bearing 27 is fixedly connected to the inner wall of the upper end of the cylinder 15. A rotating ring 28 is fixedly installed on the inner wall of the bearing 27. A connecting block 30 is arranged at the inner end of the rotating ring 28. A plurality of arc-shaped blades 29 are evenly and obliquely installed between the rotating ring 28 and the connecting block 30. The arc-shaped blades 29 are located at the lower end of the fan blade assembly 23. The wind blown upward by the fan blade assembly 23 can drive the arc-shaped blades 29 to rotate when passing through the arc-shaped blades 29. When the arc-shaped blades 29 rotate, the air flow entering the housing 1 can be disrupted and mixed, and the disrupted and mixed air is then blown onto the fire extinguisher concentration detector 10, making the detection more accurate and avoiding detection errors in some specific situations.

[0041] A wind guide cylinder 25 is installed on the outer side of the upper end of the cylinder 15 through a threaded cylinder 24. An air outlet cylinder 26 is fixedly installed at the upper end of the wind guide cylinder 25. The air outlet cylinder 26 is located at the lower end of the fire extinguisher concentration detector 10. The wind guide cylinder 25 is in the shape of a hollow frustum. The end with a smaller inner diameter of the wind guide cylinder 25 is fixedly connected to one end of the threaded cylinder 24. The end with a larger inner diameter of the wind guide cylinder 25 is fixedly connected to one end of the air outlet cylinder 26. The threaded cylinder 24 is threadedly connected to the outer side of the upper end of the cylinder 15 through an external thread two 34. The wind guide cylinder 25 and the air outlet cylinder 26 conduct and transport the wind after being disturbed by the spoiler assembly, and accurately pass through the lower end of the fire extinguisher concentration detector 10.

[0042] When the device is working, a fire extinguisher concentration detector 10 is fixedly installed on the upper side of the inner end of the outer shell 1, a cylinder 15 is fixedly installed on the lower side of the inner end of the outer shell 1, a sound-absorbing cotton 31 is fixedly installed at the inner end of the cylinder 15, a fan blade assembly 23 is rotationally connected to the inner end of the cylinder 15 through a motor 36, a flow disturbance assembly is rotationally connected to the inner side of the upper end of the cylinder 15, a wind guide cylinder 25 is installed on the outer side of the upper end of the cylinder 15 through a threaded cylinder 24, an air outlet cylinder 26 is fixedly installed at the upper end of the wind guide cylinder 25, and the air outlet cylinder 26 is located below the fire extinguisher concentration detector 10. When it is necessary to detect the concentration outside the composite fire extinguishing agent storage tank, the arc-shaped plate 8 is adsorbed on the outer wall of the composite fire extinguishing agent storage tank through the arc-shaped magnet 9, so as to fix the outer shell 1 on the outer wall of the composite fire extinguishing agent storage tank. Then, the motor 36 is started, and the motor 36 drives the fan blade assembly 23 to rotate. When the fan blade assembly 23 rotates, it blows air to the upper end of the cylinder 15. The air blown upward by the fan blade assembly 23 can drive the arc-shaped blade 29 to rotate through the arc-shaped blade 29. When the arc-shaped blade 29 rotates, it can disrupt and mix the air flow entering the outer shell 1. Then, the wind guide cylinder 25 and the air outlet cylinder 26 conduct and transport the air flow disturbed by the flow disturbance assembly, accurately pass through the lower end of the fire extinguisher concentration detector 10, and are discharged from the air outlet pipe 4 after being detected by the fire extinguisher concentration detector 10, so that the air pressure at the lower end of the outer shell 1 becomes lower, and the gas near the composite fire extinguishing agent storage tank will enter the outer shell 1, thereby completing the detection of the gas around the composite fire extinguishing agent storage tank, and thus knowing whether the composite fire extinguishing agent storage tank leaks air.

[0043] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A composite fire extinguishing agent concentration detector, comprising: A housing (1), characterized in that: a door panel (2) is rotatably mounted on the front end of the housing (1) via a hinge, an observation window (3) is arranged on the upper end of the door panel (2), an air inlet (5) is arranged on the lower end of the housing (1), an air outlet pipe (4) is fixedly mounted on the upper end, the lower end of the air outlet pipe (4) is connected to the inner end of the housing (1), and a fixing component is mounted on the rear end of the housing (1); A fire extinguisher concentration detector (10) is fixedly mounted on the upper side of the inner end of the housing (1), and an air supply component is fixedly mounted on the lower side of the inner end of the housing (1), the air supply component comprising a cylinder (15), the cylinder (15) being mounted on the inner wall of the housing (1) via a second fixing plate (16), the inner end of the cylinder (15) being rotatably connected to a fan blade assembly (23) via a motor (36), the inner side of the upper end of the cylinder (15) being rotatably connected to a spoiler assembly, an air guide cylinder (25) being mounted on the outer side of the upper end of the cylinder (15) via a threaded cylinder (24), an air outlet cylinder (26) being fixedly mounted on the upper end of the air guide cylinder (25), and the air outlet cylinder (26) being located at the lower end of the fire extinguisher concentration detector (10); A retaining ring (35) is fixedly mounted on the inner side of the upper end of the cylinder (15); a sound-absorbing cotton (31) is arranged at the inner end of the cylinder (15); the sound-absorbing cotton (31) is in a circular ring shape; an annular plastic plate (32) is fixedly mounted on the outer end of the sound-absorbing cotton (31); a plurality of sound-absorbing holes (33) are evenly arranged at the inner end of the sound-absorbing cotton (31); the plastic plate (32) is inserted into the inner end of the cylinder (15) and contacts the inner wall of the cylinder (15); when the inner end of the plastic plate (32) contacts the retaining ring (35), the outer end of the plastic plate (32) is flush with the lower end of the cylinder (15); The spoiler assembly comprises a bearing (27), the outer wall of the bearing (27) is fixedly connected to the inner wall of the upper end of the cylinder (15), a rotating ring (28) is fixedly installed on the inner wall of the bearing (27), a connecting block (30) is arranged at the inner end of the rotating ring (28), a plurality of arc-shaped blades (29) are evenly and obliquely installed between the rotating ring (28) and the connecting block (30), the arc-shaped blades (29) are located at the lower end of the fan blade assembly (23), the air guide cylinder (25) is in the shape of a hollow truncated cone, the end of the air guide cylinder (25) with a smaller inner diameter is fixedly connected to one end of the threaded cylinder (24), the end of the air guide cylinder (25) with a larger inner diameter is fixedly connected to one end of the air outlet cylinder (26), and the threaded cylinder (24) is threadedly connected to the outer side of the upper end of the cylinder (15) through an external thread (34).

2. A composite fire extinguishing agent concentration detector according to claim 1, characterized in that: The fixing component comprises a reinforcing plate (6), wherein two reinforcing plates (6) are provided, and the two reinforcing plates (6) are respectively fixedly mounted on the upper and lower sides of the rear end of the housing (1), and a fixing rod (7) is fixedly mounted on the front and rear ends of each reinforcing plate (6), an arc-shaped plate (8) is fixedly mounted on the outer end of the fixing rod (7), and an arc-shaped magnet (9) is fixedly mounted on the inner end of the arc-shaped plate (8).

3. A composite fire extinguishing agent concentration detector according to claim 1, characterized in that: The outer end of the fire extinguisher concentration detector (10) is fixedly mounted with a clamp (11) by means of bolts, and round rods (12) are fixedly mounted on both left and right ends of the clamp (11), and a fixing plate (13) is fixedly mounted on the side of the round rod (12) away from the clamp (11), and the fixing plate (13) is attached to the inner wall of the housing (1) and fixed by means of bolts.

4. A composite fire extinguishing agent concentration detector according to claim 1, characterized in that: The air outlet pipe (4) is L-shaped, and an alarm (14) is fixedly mounted on the upper end of the housing (1), and the alarm (14) is electrically connected to the fire extinguisher concentration detector (10).

5. The composite fire extinguishing agent concentration detector according to claim 1, characterized in that: The second fixing plate (16) is L-shaped, one end of the second fixing plate (16) is fixedly welded to the outer wall of the cylinder (15), and the other end of the second fixing plate (16) is fixed to the inner wall of the outer shell (1) by bolts.

6. A composite fire extinguishing agent concentration detector according to claim 1, characterized in that: The outer wall of the lower end of the cylinder (15) is provided with an external thread 1 (17), the outer wall of the upper end is provided with an external thread 2 (34), a threaded hole (18) is provided on one side of the lower end of the cylinder (15), the lower end of the cylinder (15) is threadedly connected to a threaded cover (19) via the external thread 1 (17), a circular hole (21) is provided on a side wall of one end of the threaded cover (19), an air inlet (20) is provided at the inner end of the threaded cover (19), a plurality of support rods (37) are evenly fixedly mounted on the inner end of the air inlet (20), the lower end of the motor (36) is fixedly mounted on the upper end of the support rod (37), and the output end of the motor (36) is fixedly connected to the fan blade assembly (23).

7. A composite fire extinguishing agent concentration detector according to claim 6, characterized in that: When the threaded cover (19) is screwed onto the lower end of the cylinder (15), the circular hole (21) and the threaded hole (18) are communicated, a fixing bolt (22) is inserted into the circular hole (21), the front end of the fixing bolt (22) passes through the circular hole (21) and is threadedly connected to the inner wall of the threaded hole (18), and the fan blade assembly (23) is located at the inner end of the cylinder (15), and the inner wall of the threaded cover (19) contacts the outer end of the plastic plate (32).

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