Fire-fighting smoke exhaust device

Abstract

The utility model relates to the technical field of fire-fighting equipment, and provides a fire-fighting smoke exhaust device which comprises a flue, a smoke exhaust fan arranged at one end of the flue and a filter unit arranged at the other end of the flue, the filter unit comprises an outer frame, and two filter screen plates arranged up and down are arranged in the outer frame; limiting on the two filter screen plates is relieved through the second driving mechanism, then the first driving mechanism drives the outer frame to rotate, the using positions of the two filter screen plates are adjusted up and down, then positioning is conducted through the second driving mechanism, and the filter screen plates with more dust attached to the surfaces are changed from the lower portion to the upper portion. The filter screen plate with less dust attached to the surface is replaced from the upper part to the lower part, so that the service life of the filter screen plate is prolonged, the replacement period is prolonged, and the problem that the whole filter screen needs to be replaced or cleaned in the prior art is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of fire-fighting facilities, and in particular to a fire-fighting smoke exhaust device. Background Art

[0002] When a fire occurs indoors, it is often not the open flame that harms people, but the smoke emitted when the fire occurs. The smoke contains a lot of dust and harmful substances, which can cause dizziness and suffocation to the escaping personnel. Therefore, it is necessary to install a fire smoke exhaust device to prevent the smoke from entering the evacuation passage. At present, there are many ventilation and smoke exhaust devices for fire fighting on the market. Filters are generally installed in the ventilation device to play a preliminary filtering role for the smoke. However, due to the presence of a large amount of dust and other impurities in the smoke, after a long period of exhaust, it is easy to cause the filter surface and ventilation pipeline to be blocked, resulting in smoke exhaust failure, posing a safety hazard.

[0003] The search announcement number CN218328510U discloses a fire ventilation and smoke exhaust device, including a smoke exhaust pipe, a dust cleaning mechanism arranged at the upper end of the smoke exhaust pipe, a mounting mechanism arranged at the lower end of the smoke exhaust pipe, and a filter screen arranged inside the smoke exhaust pipe, wherein the dust cleaning mechanism includes a sealing cover fixedly connected to the top of the smoke exhaust pipe, a servo motor fixed to the top of the smoke exhaust pipe by bolts, a screw fixedly connected to the motor shaft of the servo motor, two groups of positioning holes through the top of the smoke exhaust pipe, a movable part inserted in the positioning hole, and two groups of cleaning brushes fixed to the bottom of the movable part. The fire ventilation and smoke exhaust device can assemble and fix the filter screen into the smoke exhaust pipe by setting the mounting mechanism, and can automatically clean the filter screen surface by setting the dust cleaning mechanism, effectively avoiding the problem of the filter screen surface being blocked due to excessive dust.

[0004] However, the above-mentioned anti-ventilation smoke exhaust device still has the following problems: due to the gravity of smoke in the smoke exhaust duct, dust particles or other debris in the smoke are easy to flow in the lower part, making the filter in the smoke exhaust duct have a much larger amount of dust attached to the lower part than to the upper part, and the filter in the above-mentioned anti-ventilation smoke exhaust device is a whole mesh plate structure, so the entire filter needs to be replaced or cleaned, and the replacement cycle is relatively short, which causes inconvenience. Utility Model Content

[0005] The utility model provides a fire smoke exhaust device, which solves the problem in the prior art that the entire filter screen needs to be replaced or cleaned.

[0006] The technical solution of the utility model is as follows: a fire smoke exhaust device, including a flue, a smoke exhaust fan arranged at one end of the flue, and a filter unit arranged at the other end of the flue, the filter unit including an outer frame, two filter screens arranged up and down are arranged in the outer frame, a first driving mechanism for driving the outer frame to rotate and replace the two filter screens is provided on one side of the outside of the flue, two positioning clamps are provided on both sides of the outer frame, and a second driving mechanism for driving the two positioning clamps to clamp the two filter screens is provided on the other side of the outside of the flue.

[0007] Preferably, rubber pads are fixed to the top and bottom of the outer frame, and notches are provided on both sides of the outer frame.

[0008] Preferably, the filter screen plate comprises a screen frame, a metal screen is fixed inside the screen frame, and a rotating shaft rotatably connected to an outer frame is fixed at the middle position of both ends of the screen frame.

[0009] Preferably, a gap is maintained between the upper and lower screen frames and between the screen frame and the outer frame, and dust curtains covering the gap are fixed to the upper and lower ends of the two screen frames.

[0010] Preferably, the first driving mechanism includes a first motor, which is fixed to the outer side of the flue, and a sleeve is fixed to the output end of the first motor, the sleeve is rotatably connected to the flue, and the sleeve is fixedly connected to the middle position of one side of the outer frame.

[0011] Preferably, the positioning clamp comprises a U-shaped clamp, the U-shaped clamp is slidably limited in a slot, a threaded sleeve is fixedly embedded in the middle of the U-shaped clamp, and an arc-shaped clamp capable of accommodating upper and lower mesh frames is provided on the U-shaped clamp.

[0012] Preferably, the second driving mechanism includes a second motor, which is fixed to the outer side of the flue, and an axis rod is fixed to the output end of the second motor, which is rotatably connected to the flue, and one end of the axis rod away from the second motor is inserted into a sleeve and rotatably connected to the sleeve.

[0013] Preferably, the shaft rod is provided with two sections of external threads in opposite directions, and the two sections of external threads are respectively threadedly connected to the threaded sleeves on the two U-shaped clamping plates.

[0014] Preferably, a counterweight bar is fixed to the bottom outer surface of the two net frames.

[0015] Preferably, the first motor and the second motor are symmetrically distributed on both sides of the flue, and both the first motor and the second motor are servo motors.

[0016] The beneficial effects of the utility model are:

[0017] 1. In the utility model, the restriction on the two filter screens is released by the second driving mechanism, and then the first driving mechanism drives the outer frame to rotate, thereby adjusting the use positions of the two filter screens up and down, and then positioning them by the second driving mechanism, so that the filter screen with more dust on the surface is replaced from the lower part to the upper part, and the filter screen with less dust on the surface is replaced from the upper part to the lower part, thereby increasing the service life of the filter screen and extending the replacement cycle, thereby solving the problem of the need to replace or clean the entire filter screen in the prior art;

[0018] 2. In the utility model, the bottom outer surfaces of the two mesh frames are fixed with counterweight bars. During the replacement of the two filter screens, the counterweight bars on the two mesh frames can keep the two filter screens in a vertical state to prevent the debris intercepted by the metal mesh from turning over. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0020] Figure 1 This is a structural schematic diagram of a fire smoke exhaust device proposed by the utility model;

[0021] Figure 2 This is a schematic diagram of the filter unit structure proposed by the utility model;

[0022] Figure 3 This is a schematic diagram of the outer frame structure proposed by the utility model;

[0023] Figure 4 This is a schematic diagram of the filter screen structure proposed by the utility model;

[0024] Figure 5 This is a schematic diagram of the structure of the first driving mechanism proposed in the utility model;

[0025] Figure 6 This is a schematic diagram of the second driving mechanism and the positioning clamp structure proposed by the utility model;

[0026] In the figure: 1. flue; 2. smoke exhaust fan; 3. outer frame; 31. rubber pad; 32. notch; 4. first drive mechanism; 41. first motor; 42. bushing; 5. filter screen; 51. screen frame; 52. metal screen; 53. rotating shaft; 54. dust curtain; 55. counterweight bar; 6. second drive mechanism; 61. second motor; 62. shaft; 63. external thread; 7. positioning clip; 71. U-shaped clamp; 72. threaded sleeve; 73. arc-shaped bayonet. DETAILED DESCRIPTION

[0027] The following will be combined with the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] See also Figure 1 and Figure 2 The utility model provides a technical solution: a fire smoke exhaust device, comprising a flue 1, a smoke exhaust fan 2 arranged at one end of the flue 1, and a filter unit arranged at the other end of the flue 1, the filter unit comprising an outer frame 3, two filter screens 5 arranged up and down are arranged in the outer frame 3, a first driving mechanism 4 for driving the outer frame 3 to rotate and replace the two filter screens 5 is provided on one side of the outside of the flue 1, two positioning clamps 7 are provided on both sides of the outer frame 3, and a second driving mechanism 6 for driving the two positioning clamps 7 to clamp the two filter screens 5 is provided on the other side of the outside of the flue 1.

[0029] See also Figure 2 and Figure 3 Rubber pads 31 are fixed to the top and bottom of the outer frame 3 to reduce the collision and friction between the outer frame 3 and the inner wall of the flue 1. Notches 32 are opened on both sides of the outer frame 3 for telescopic limiting of the positioning clip 7.

[0030] See also Figure 2 and Figure 4 The filter screen plate 5 includes a screen frame 51, in which a metal screen 52 is fixed for intercepting debris in the flowing air. A rotating shaft 53 rotatably connected to the outer frame 3 is fixed at the middle position of both ends of the screen frame 51. A gap is maintained between the upper and lower screen frames 51 and between the screen frame 51 and the outer frame 3. Dust-proof curtains 54 covering the gap are fixed at the upper and lower ends of the two screen frames 51. The dust-proof curtains 54 are made of plastic material for sealing the gap.

[0031] See also Figure 2 and Figure 5 The first driving mechanism 4 includes a first motor 41, which is fixed to the outer side of the flue 1. A sleeve 42 is fixed to the output end of the first motor 41. The sleeve 42 is rotatably connected to the flue 1. The sleeve 42 is fixedly connected to the middle position of one side of the outer frame 3. After the positioning clamp 7 releases the restriction on the mesh frame 51, the sleeve 42 can be driven to rotate by the first motor 41, and then the sleeve 42 can drive the outer frame 3 to rotate, so that the upper and lower filter screens 5 are swapped.

[0032] See also Figure 2 and Figure 6The positioning clamp 7 includes a U-shaped clamp 71, the U-shaped clamp 71 is slidably limited in the slot 32, a threaded sleeve 72 is fixedly embedded in the middle of the U-shaped clamp 71, and an arc-shaped bayonet 73 capable of accommodating the upper and lower net frames 51 is opened on the U-shaped clamp 71. The second driving mechanism 6 includes a second motor 61, the second motor 61 is fixed to the outer side of the flue 1, and a shaft 62 is fixed to the output end of the second motor 61. The shaft 62 is rotatably connected to the flue 1, and the shaft 62 is away from the second motor 6 One end of the shaft 62 is inserted into the shaft sleeve 42 and is rotatably connected with the shaft sleeve 42. The shaft rod 62 is provided with two sections of external threads 63 in opposite directions. The two sections of external threads 63 are respectively threadedly connected with the threaded sleeves 72 on the two U-shaped clamping plates 71. The shaft rod 62 is driven to rotate by the second motor 61. The external threads 63 on the shaft rod 62 and the threads of the threaded sleeves 72 on the two U-shaped clamping plates 71 act on each other. At the same time, under the sliding limit of the notch 32 on the U-shaped clamping plates 71, the two U-shaped clamping plates 71 can slide relative to each other.

[0033] It should be noted that a counterweight bar 55 is fixed to the bottom outer surface of the two mesh frames 51. During the replacement of the two filter mesh plates 5, the counterweight bar 55 on the two mesh frames 51 can keep the two filter mesh plates 5 in a vertical state during the replacement process to prevent the debris intercepted by the metal mesh 52 from turning over.

[0034] Furthermore, the first motor 41 and the second motor 61 are symmetrically distributed on both sides of the flue 1 , and both the first motor 41 and the second motor 61 are servo motors.

[0035] The working principle and use process of the utility model are as follows: when it is necessary to adjust the use position of the upper and lower metal meshes 52, the shaft rod 62 can be driven to rotate by the second motor 61, and the external thread 63 on the shaft rod 62 and the thread of the threaded sleeve 72 on the two U-shaped clamping plates 71 act, and at the same time, under the sliding limit of the U-shaped clamping plates 71 by the notch 32, the two U-shaped clamping plates 71 can be synchronously slid relative to each other to the two sides and shrink in the notch 32, and then the shaft sleeve 42 is driven to rotate by the first motor 41, and then the shaft sleeve 42 drives the outer frame 3 to rotate, so that the upper and lower filter screens 5 are swapped, and under the action of the counterweight bars 55 on the two screen frames 51, the two filter screens 5 can be kept in a vertical state during the swapping process to prevent the sundries intercepted by the metal mesh 52 from turning over;

[0036] After the two filter screens 5 are replaced, the second motor 61 can drive the shaft 62 to rotate in the opposite direction, so that the two U-shaped clamps 71 can slide relative to each other synchronously and extend outward from the slot 32, so that the upper and lower screen frames 51 are clamped into the arc-shaped clamping slots 73 by the two U-shaped clamps 71 to position the two filter screens 5.

[0037] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fire smoke exhaust device, comprising a smoke duct (1), a smoke exhaust fan (2) arranged at one end of the smoke duct (1), and a filter unit arranged at the other end of the smoke duct (1), characterized in that: The filter unit comprises an outer frame (3), two filter screens (5) arranged up and down are arranged inside the outer frame (3), a first driving mechanism (4) for driving the outer frame (3) to rotate and replace the two filter screens (5) is arranged on one side outside the flue (1), two positioning clamps (7) are arranged on both sides of the outer frame (3), and a second driving mechanism (6) for driving the two positioning clamps (7) to clamp the two filter screens (5) is arranged on the other side outside the flue (1).

2. A fire smoke exhaust device according to claim 1, characterized in that: Rubber pads (31) are fixed to the top and bottom of the outer frame (3), and notches (32) are provided on both sides of the outer frame (3).

3. A fire smoke exhaust device according to claim 2, characterized in that: The filter screen plate (5) comprises a screen frame (51), a metal screen (52) is fixed inside the screen frame (51), and a rotating shaft (53) rotatably connected to the outer frame (3) is fixed at the middle position of both ends of the screen frame (51).

4. A fire smoke exhaust device according to claim 3, characterized in that: A gap is maintained between the upper and lower screen frames (51) and between the screen frame (51) and the outer frame (3), and dust-proof curtains (54) covering the gap are fixed to the upper and lower ends of the two screen frames (51).

5. A fire smoke exhaust device according to claim 2, characterized in that: The first driving mechanism (4) comprises a first motor (41), the first motor (41) being fixed to the outer side surface of the flue (1), a shaft sleeve (42) being fixed to the output end of the first motor (41), the shaft sleeve (42) being rotatably connected to the flue (1), and the shaft sleeve (42) being fixedly connected to a middle position of one side of the outer frame (3).

6. A fire smoke exhaust device according to claim 5, characterized in that: The positioning clamp (7) comprises a U-shaped clamp (71), the U-shaped clamp (71) is slidably limited in the slot (32), a threaded sleeve (72) is fixedly embedded in the middle of the U-shaped clamp (71), and an arc-shaped clamp (73) capable of accommodating two upper and lower mesh frames (51) is provided on the U-shaped clamp (71).

7. A fire smoke exhaust device according to claim 6, characterized in that: The second driving mechanism (6) comprises a second motor (61), the second motor (61) being fixed to the outer side surface of the flue (1), a shaft (62) being fixed to the output end of the second motor (61), the shaft (62) being rotationally connected to the flue (1), and an end of the shaft (62) away from the second motor (61) being inserted into a shaft sleeve (42) and rotationally connected to the shaft sleeve (42).

8. A fire smoke exhaust device according to claim 7, characterized in that: The shaft rod (62) is provided with two sections of external threads (63) in opposite directions, and the two sections of external threads (63) are respectively threadedly connected to threaded sleeves (72) on the two U-shaped clamping plates (71).

9. A fire smoke exhaust device according to claim 3, characterized in that: The bottom outer surfaces of the two net frames (51) are both fixed with weight bars (55).

10. A fire smoke exhaust device according to claim 7, characterized in that: The first motor (41) and the second motor (61) are symmetrically distributed on both sides of the flue (1), and both the first motor (41) and the second motor (61) are servo motors.

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