Composite fire extinguishing agent concentration detector

Abstract

The invention relates to the technical field of fire fighting, in particular to a composite fire extinguishing agent concentration detector which comprises a shell, a door plate is rotatably mounted at the front end of the shell through a hinge, an observation window is arranged at the upper end of the door plate, an air inlet is formed in the lower end of the shell, an air outlet pipe is fixedly mounted at the upper end of the shell, and the lower end of the air outlet pipe communicates with the inner end of the shell; a fixing part is installed at the rear end of the shell, a fire extinguisher concentration detector is fixedly installed on the upper side of the inner end of the shell, an air supply part is fixedly installed on the lower side of the inner end of the shell and comprises a cylinder, and the cylinder is installed on the inner wall of the shell through a second fixing plate; the composite fire extinguishing agent storage tank has the beneficial effects that the arc-shaped plate is adsorbed on the outer wall of the composite fire extinguishing agent storage tank through the magnet, so that the shell is fixed on the outer wall of the composite fire extinguishing agent storage tank, the effect of simple and rapid installation is achieved, and when the composite fire extinguishing agent storage tank needs to be detected, the composite fire extinguishing agent storage tank is directly adsorbed on the tank body and directly removed when detection is not needed; operation is simple and convenient.

Description

Technical Field

[0001] The invention relates to the technical field of fire fighting, in particular to a composite fire extinguishing agent concentration detector. Background Art

[0002] Gas fire extinguishing agent is a fire extinguishing agent that extinguishes fire in gaseous state. The existing technical solutions still have the following problems when used: due to the high overall height of the device, the control panel is also located at a high position, and the control panel is not convenient to adjust according to the height of the user; due to the large volume and weight of the storage tank, it is not convenient to place it at the bottom of the detection mechanism for detection; the detection mechanism will be damaged after long-term use, and the detection mechanism is not convenient to disassemble and repair; so it is necessary to improve the above problems.

[0003] Chinese patent CN220137101U discloses a gas extinguishing agent concentration test device, including a base, a first drive motor is installed inside the base, a first screw rod is connected to one side of the first drive motor, a limit rod is arranged on one side of the first screw rod, a positioning frame is connected to the outside of the limit rod, a fire extinguishing agent storage tank is arranged inside the positioning frame, a protective frame is connected to the top of the base, and a controller is installed on the side of the protective frame

[0004] However, the above solution has a complex structure, troublesome installation, and is inconvenient to quickly install the detector on the surface of the tank body, which is inconvenient to use. Therefore, the present invention proposes a composite fire extinguishing agent concentration detector to solve the above problem. 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 of the existing fire extinguishing agent concentration detector proposed in the above background technology, such as complex installation structure, troublesome installation, inconvenience in quickly installing the detector on the surface of the tank body, and inconvenience in use.

[0006] To achieve the above object, the present invention provides the following technical solution: a composite fire extinguishing agent concentration detector, comprising: a housing, a door panel is rotatably mounted on the front end of the housing through a hinge, an observation window is arranged on the upper end of the door panel, an air inlet is arranged on the lower end of the housing, an air outlet pipe is fixedly mounted on the upper end, the lower end of the air outlet pipe is connected to the inner end of the housing, and a fixing component is installed on 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 shell, and an air supply component is fixedly installed on the lower side of the inner end of the shell;

[0008] The air supply component includes a cylinder, which is installed on the inner wall of the outer shell through a fixing plate 2. The inner end of the cylinder is rotatably connected to a fan blade assembly through a motor, the inner side of the upper end of the cylinder is rotatably connected to a spoiler assembly, the outer side of the upper end of the cylinder is installed with an air guide cylinder through a threaded cylinder, and the upper end of the air guide cylinder is fixedly installed with an air outlet cylinder, which is located at the lower end of the fire extinguisher concentration detector.

[0009] Preferably, the fixing component includes a reinforcing plate, and two reinforcing plates are provided, and the two reinforcing plates are respectively fixedly installed on the upper and lower sides of the rear end of the shell, and the front and rear ends of each reinforcing plate are fixedly installed with a fixing rod, the outer end of the fixing rod is fixedly installed with an arc plate, and the inner end of the arc plate is fixedly installed with an arc magnet.

[0010] Preferably, a clamp is fixedly installed on the outer end of the fire extinguisher concentration detector by bolts, round rods are fixedly installed on both ends of the clamp, and a fixing plate 1 is fixedly installed on the side of the round rod away from the clamp, and the fixing plate 1 is attached to the inner wall of the outer shell and fixed by bolts.

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

[0012] Preferably, the fixing plate 2 is L-shaped, one end of the fixing plate 2 is fixedly welded to the outer wall of the cylinder, and the other end of the fixing plate 2 is fixed to the inner wall of the shell by bolts.

[0013] Preferably, a retaining ring is fixedly installed on the inner side of the upper end of the cylinder, and sound-absorbing cotton is arranged at the inner end of the cylinder. The sound-absorbing cotton is in a circular ring shape, and an annular plastic plate is fixedly installed on the outer end of the sound-absorbing cotton. A plurality 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 external thread 1, the outer wall of the upper end is provided with external thread 2, a threaded hole is provided on one side of the lower end of the cylinder, the lower end of the cylinder is threadedly connected to a threaded cover through the external thread 1, a circular hole is provided on the side wall of one end of the threaded cover, an air inlet is provided at the inner end of the threaded cover, a number of support rods are evenly fixedly installed at the inner end of the air inlet, the lower end of the motor is fixedly installed on the upper end of the support rod, and the output end of the motor is fixedly connected to the fan blade assembly.

[0015] Preferably, when the threaded cover is screwed onto the lower end of the cylinder, the circular hole and the threaded hole are connected, a fixing bolt is inserted into the circular hole, the front end of the fixing bolt passes through the circular hole and is threadedly connected to the inner wall of the threaded hole, and 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 is in contact with the outer end of the plastic plate.

[0016] Preferably, the spoiler assembly 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 provided at the inner end of the rotating ring, and a plurality of arc-shaped blades are evenly and obliquely installed between the rotating ring and the connecting block, and the arc-shaped blades are located at the lower end of the fan blade assembly.

[0017] Preferably, the air guide tube is in the shape of a hollow cone, the end of the air guide tube with a smaller inner diameter is fixedly connected to one end of the threaded tube, the end of the air guide tube with a larger inner diameter is fixedly connected to one end of the air outlet tube, and the threaded tube is threadedly connected to the outer side of the upper end of the cylinder through two external threads.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] By turning on the motor, the motor drives the fan blade assembly to rotate. When the fan blade assembly rotates, air is blown to the upper end of the cylinder. The wind blown upward by the fan blade assembly can drive the arc blade to rotate through the arc blade. When the arc blade rotates, the wind flow entering the shell can be disrupted and mixed. Then the air guide tube and the air outlet tube guide and convey the wind after the spoiler assembly spoils the wind, accurately passes through the lower end of the fire extinguisher concentration detector, and is discharged from the air outlet pipe after being detected by the fire extinguisher concentration detector, so that the air pressure at the lower end of the shell becomes low, and the gas near the composite fire extinguishing agent storage tank will enter the shell, thereby completing the detection of the gas around the composite fire extinguishing agent storage tank, so as to know whether the composite fire extinguishing agent storage tank is leaking;

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

[0021] The arc plate is adsorbed on the outer wall of the composite fire extinguishing agent storage tank by a magnet, so that the outer shell is fixed on the outer wall of the composite fire extinguishing agent storage tank, which makes the installation simple and fast. When the composite fire extinguishing agent storage tank needs to be inspected, it can be directly adsorbed on the tank body. When it is not necessary to inspect, it can be directly removed. The operation is simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a front schematic diagram 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 This 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 5This is a schematic diagram of the structure of the air supply component of the present invention;

[0027] Figure 6 This is a schematic diagram of the expanded structure of the air supply component of the present invention;

[0028] Figure 7 This is a second schematic diagram of the expanded structure of the air supply component of the present invention;

[0029] Figure 8 This is a schematic diagram of the structure in which the retaining ring of the present invention is located at the outer end of the cylinder.

[0030] In the figure: 1. shell; 2. door panel; 3. observation window; 4. exhaust pipe; 5. air inlet; 6. reinforcement plate; 7. fixing rod; 8. arc plate; 9. arc magnet; 10. fire extinguisher concentration detector; 11. clamp; 12. round rod; 13. fixing plate 1; 14. alarm; 15. cylinder; 16. fixing plate 2; 17. external thread 1; 18. threaded hole; 19. threaded cover; 20. air inlet; 21. round hole; 22. fixing bolt; 23. fan blade assembly; 24. threaded cylinder; 25. air guide tube; 26. air outlet tube; 27. bearing; 28. rotating ring; 29. ​​arc blade; 30. connecting block; 31. sound-absorbing cotton; 32. plastic plate; 33. sound-absorbing hole; 34. external thread 2; 35. retaining ring; 36. motor; 37. support rod. DETAILED DESCRIPTION

[0031] In order to make the purpose and technical solution of the present invention clearly and completely described, and the advantages more clearly understood, the embodiments of the present invention are further described in detail 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, and are not used to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] See also Figures 1 to 8 The present invention provides a technical solution: a composite fire extinguishing agent concentration detector, comprising: a shell 1, a door panel 2 is rotatably installed at the front end of the shell 1 through a hinge, the end of the door panel 2 away from the hinge is connected to the shell 1 through a door lock, which is convenient for opening and closing the door panel 2, and 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 extinguisher concentration detector 10 at the inner end of the shell 1, an air inlet 5 is arranged at the lower end of the 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 connected to the inner end of the shell 1, the air outlet pipe 4 is L-shaped, and the outer end of the air outlet pipe 4 is far away from the shell 1, when the fire extinguishing agent concentration detector is working, the detected gas enters the inner end of the shell 1 through the air inlet 5, and the gas is discharged from the air outlet pipe 4 after being detected by the fire extinguisher concentration detector 10.

[0033] A fixing component is installed at the rear end of the 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 a reinforcing plate 6. Two reinforcing plates 6 are provided. The two reinforcing plates 6 are fixedly installed on the upper and lower sides of the rear end of the shell 1 respectively. A fixing rod 7 is fixedly installed at the front and rear ends of each reinforcing plate 6. The reinforcing plate 6 increases the contact area between the fixing rod 7 and the shell 1 and strengthens the rear end of the shell 1. An arc plate 8 is fixedly installed on the outer end of the fixing rod 7. The two arc plates 8 are bent to the upper and lower sides for easy fitting on the outer wall of the composite fire extinguishing agent storage tank. An arc magnet 9 is fixedly installed on the inner end of the arc plate 8. The arc plate 8 is adsorbed on the outer wall of the composite fire extinguishing agent storage tank by the arc magnet 9, so that the shell 1 is fixed on the outer wall of the composite fire extinguishing agent storage tank, which plays a role in simple and fast installation. When the composite fire extinguishing agent storage tank needs to be inspected, it is directly adsorbed on the tank body, and it can be directly removed when not to be inspected.

[0034] A fire extinguisher concentration detector 10 is fixedly installed on the upper side of the inner end of the shell 1, and an alarm 14 is fixedly installed on the upper end of the shell 1. The alarm 14 and the fire extinguisher concentration detector 10 are electrically connected. When the concentration detected by the fire extinguisher concentration detector 10 is greater than the set value, the alarm 14 sends out an alarm to notify the staff. The outer end of the fire extinguisher concentration detector 10 is fixedly installed with a clamp 11 by bolts, and round rods 12 are fixedly installed on both ends of the clamp 11. A fixing plate 13 is fixedly installed on the side of the round rod 12 away from the clamp 11. The fixing plate 13 is attached to the inner wall of the shell 1 and fixed by bolts to fix the fire extinguisher concentration detector 10, thereby facilitating disassembly and assembly.

[0035] An air supply component is fixedly installed on the lower side of the inner end of the shell 1, and the air supply component includes a cylinder 15. The cylinder 15 is installed on the inner wall of the shell 1 through a fixing plate 16. The fixing plate 16 is L-shaped. One end of the fixing plate 16 is fixedly welded to the outer wall of the cylinder 15, and the other end of the fixing plate 16 is provided with a bolt hole and fits on the inner wall of the shell 1. The bolt passes through the bolt hole and is threadedly connected to the inner wall of the shell 1 to fix the cylinder 15, which facilitates the disassembly and assembly of the cylinder 15.

[0036] The inner end of the cylinder 15 is rotatably connected to the fan blade assembly 23 through the 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, air is blown to the upper end of the cylinder 15. The blown air passes through the fire extinguisher concentration detector 10 and is discharged from the air outlet pipe 4, so that the air pressure at the lower end of the shell 1 becomes low, and the gas near the composite fire extinguishing agent storage tank will enter the shell 1, thereby completing the detection of the gas around the composite fire extinguishing agent storage tank, so as to know 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, and 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, and a ring-shaped plastic plate 32 is fixedly installed on the outer end of the sound-absorbing cotton 31. A plurality of sound-absorbing holes 33 are evenly opened 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, thereby reducing the noise generated during operation.

[0038] The outer wall of the lower end of the cylinder 15 is provided with an external thread 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 with a threaded cover 19 through the external thread 17, a circular hole 21 is provided on the side wall of one end of the threaded cover 19, and an air inlet 20 is provided at the inner end of the threaded cover 19. The setting of the air inlet 20 allows wind to pass through the threaded cover 19 and enter the inner end of the housing 1. A plurality of support rods 37 are evenly fixedly installed at the inner end of the air inlet 20, and the lower end of the motor 36 is fixedly installed on the upper end of the support rod 37 to fix the motor 36. When the threaded cover 19 is screwed on the lower end of the cylinder 15, the circular hole 21 is connected to the threaded hole 18, and the circular hole 21 is inserted into the inner end of the circular hole 21. There is a fixing bolt 22, the front end of which passes through the circular hole 21 and is threadedly connected to the inner wall of the threaded hole 18, further fixing the threaded cover 19 to prevent the vibration generated when the motor 36 is working 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 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 to fix the plastic plate 32 and the sound-absorbing cotton 31. When the sound-absorbing cotton 31 needs to be replaced, or the motor 36 and the fan blade assembly 23 need to be overhauled, the threaded cover 19 is unscrewed from the lower end of the cylinder 15, and the sound-absorbing cotton 31 can be replaced, or the motor 36 and the fan blade assembly 23 can be overhauled. The operation is simple and convenient.

[0039] Specifically, when it is necessary to detect the concentration of the outer end of the composite fire extinguishing agent storage tank, the arc plate 8 is adsorbed on the outer wall of the composite fire extinguishing agent storage tank by the arc magnet 9, so that the outer shell 1 is fixed on the outer wall of the composite fire extinguishing agent storage tank, and then the motor 36 is turned on, and the motor 36 drives the fan blade assembly 23 to rotate. When the fan blade assembly 23 rotates, air is blown to the upper end of the cylinder 15, and 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, so that the air pressure at the lower end of the outer shell 1 becomes low, 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, so as to know 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, and 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 provided at the inner end of the rotating ring 28. A plurality of arcuate blades 29 are evenly and obliquely installed between the rotating ring 28 and the connecting block 30. The arcuate 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 arcuate blades 29 to rotate through the arcuate blades 29. When the arcuate blades 29 rotate, the wind flow entering the outer casing 1 can be disrupted and mixed, and the disrupted and mixed wind can be blown toward the fire extinguisher concentration detector 10, so that the detection accuracy is higher and detection errors can be avoided under certain specific circumstances.

[0041] An air guide tube 25 is installed on the outer side of the upper end of the cylinder 15 through a threaded tube 24, and an air outlet tube 26 is fixedly installed on the upper end of the air guide tube 25. The air outlet tube 26 is located at the lower end of the fire extinguisher concentration detector 10. The air guide tube 25 is in the shape of a hollow cone. The end of the air guide tube 25 with a small inner diameter is fixedly connected to one end of the threaded tube 24, and the end of the air guide tube 25 with a large inner diameter is fixedly connected to one end of the air outlet tube 26. The threaded tube 24 is threadedly connected to the outer side of the upper end of the cylinder 15 through an external thread 234. The air guide tube 25 and the air outlet tube 26 guide and convey the wind after the spoiler component is spoiled, and accurately pass through the lower end of the fire extinguisher concentration detector 10.

[0042] When the device is working, the fire extinguisher concentration detector 10 is fixedly installed on the upper side of the inner end of the shell 1, the cylinder 15 is fixedly installed on the lower side of the inner end of the shell 1, the sound-absorbing cotton 31 is fixedly installed on the inner end of the cylinder 15, the fan blade assembly 23 is rotatably connected to the inner end of the cylinder 15 through the motor 36, the spoiler assembly is rotatably connected to the inner side of the upper end of the cylinder 15, an air guide cylinder 25 is installed on the outer side of the upper end of the cylinder 15 through the threaded cylinder 24, and an air outlet cylinder 26 is fixedly installed on the upper end of the air guide cylinder 25, and the air outlet cylinder 26 is located at the lower end of the fire extinguisher concentration detector 10. When it is necessary to detect the concentration of the outer end of the composite fire extinguishing agent storage tank, the arc plate 8 is adsorbed on the outer wall of the composite fire extinguishing agent storage tank through the arc magnet 9, so that the shell 1 is fixed on the outer wall of the composite fire extinguishing agent storage tank. , and then turn on the motor 36, the motor 36 drives the fan blade assembly 23 to rotate, and when the fan blade assembly 23 rotates, air is blown to the upper end of the cylinder 15, and the wind blown upward by the fan blade assembly 23 passes through the arc blade 29 to drive the arc blade 29 to rotate. When the arc blade 29 rotates, the wind flow entering the shell 1 can be disrupted and mixed, and then the air guide tube 25 and the air outlet tube 26 guide and convey the wind after the spoiler assembly spoils the flow, accurately pass through the lower end of the fire extinguisher concentration detector 10, and be 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 shell 1 becomes low, and the gas near the composite fire extinguishing agent storage tank will enter the shell 1, thereby completing the detection of the gas around the composite fire extinguishing agent storage tank, so as to know whether the composite fire extinguishing agent storage tank is leaking.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that 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: The housing (1) is 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 inner side of the housing (1), and an air supply component is fixedly mounted on the lower inner side of the housing (1); The air supply component comprises a cylinder (15), the cylinder (15) is mounted on the inner wall of the housing (1) through a second fixing plate (16), the inner end of the cylinder (15) is rotatably connected to a fan blade assembly (23) through a motor (36), the inner side of the upper end of the cylinder (15) is rotatably connected to a spoiler assembly, the outer side of the upper end of the cylinder (15) is mounted with an air guide cylinder (25) through a threaded cylinder (24), the upper end of the air guide cylinder (25) is fixedly mounted with an air outlet cylinder (26), and the air outlet cylinder (26) is located at the lower end of the fire extinguisher concentration detector (10).

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), and 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: 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).

7. A composite fire extinguishing agent concentration detector according to claim 6, 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) through the external thread 1 (17), a circular hole (21) is provided on the 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 installed at the inner end of the air inlet (20), the lower end of the motor (36) is fixedly installed 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).

8. A composite fire extinguishing agent concentration detector according to claim 7, 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) is in contact with the outer end of the plastic plate (32).

9. A composite fire extinguishing agent concentration detector according to claim 8, characterized in that: 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), and a plurality of arc-shaped blades (29) are evenly and obliquely installed between the rotating ring (28) and the connecting block (30), and the arc-shaped blades (29) are located at the lower end of the fan blade assembly (23).

10. A composite fire extinguishing agent concentration detector according to claim 8, characterized in that: The air guide tube (25) is in the shape of a hollow truncated cone. The end of the air guide tube (25) with a smaller inner diameter is fixedly connected to one end of the threaded tube (24), and the end of the air guide tube (25) with a larger inner diameter is fixedly connected to one end of the air outlet tube (26). The threaded tube (24) is threadedly connected to the outer side of the upper end of the cylinder (15) through an external thread (34).

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