Multifunctional fire-resistant air pipe

Abstract

A pipe body comprises a galvanized steel plate layer, a rock wool fireproof layer and a calcium silicate plate fireproof layer from inside to outside, a filter screen and a brush are arranged in the pipe body, the brush comprises a brush plate, the lower end of the brush is exposed, a top plate extends out of the top of the brush plate, an air inlet gap is reserved between the brush plate and the side wall of the pipe body, and a dust suction opening is formed in the bottom wall of the pipe body. A dust suction pipe is downwards connected to the dust suction port, and a valve is mounted on the dust suction pipe. After being used for a long time, the lower end of the brush is pulled to drive bristles of the brush to brush away dust on the filter screen downwards, and before the dust on the filter screen is brushed away, a negative pressure dust collector is connected with a dust collection pipe and a valve is opened, and then the negative pressure dust collector generates negative pressure at a dust collection opening through the dust collection pipe. Dust is directly discharged from the dust collection opening or falls into the dust containing channel under the negative pressure effect, air enters the dust containing channel from the air inlet gap under the negative pressure effect, and the dust in the dust containing channel is driven to move to the dust collection opening along the dust containing channel and is discharged out of the pipe body from the dust collection opening.

Description

Technical Field

[0001] The utility model relates to the technical field of air ducts, in particular to a multifunctional fire-resistant air duct. Background Art

[0002] The fire-resistant air duct is a common ventilation duct. Its pipe body is generally composed of a galvanized steel plate layer, a rock wool fireproof layer and a calcium silicate board fireproof layer from the inside to the outside, and has good fire resistance. In order to filter the air, a filter is installed in the pipe body. The air enters the pipe body of the air duct from the air inlet end of the air duct, and then passes through the filter. During this process, the filter filters out the dust in the air, and the filtered air is discharged from the air outlet end of the air duct. After the fire-resistant air duct is used for a long time, the dust attached to the filter is easy to block the filter, resulting in a decrease in ventilation efficiency. Some fire-resistant air ducts have a dust removal function. For example, the fire-resistant air duct disclosed in the patent document CN220541329U has a brush on the side of the filter close to the air inlet end of the air duct, and the lower end of the brush is exposed. The maintenance personnel pull the lower end of the brush to let the brush brush down the dust attached to the filter. Despite this, the dust still remains in the air duct body. When the air duct is in use, the dust is easily rolled up by the air flow in the pipe body and then reattached to the filter and blocks the filter again. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a multifunctional fire-resistant air duct, which filters air through a filter screen, brushes away dust on the filter screen through a brush, and can discharge the dust after brushing.

[0004] In order to solve the above technical problems, the utility model discloses a multifunctional fire-resistant air duct, which has a pipe body for air circulation, wherein the pipe body comprises a galvanized steel plate layer, a rock wool fireproof layer and a calcium silicate board fireproof layer from the inside to the outside, a filter screen for filtering air and a brush for removing dust from the filter screen are arranged in the pipe body, and the brush comprises a brush plate facing the filter screen, the brush plate extends toward the filter screen and has bristles against the filter screen, the lower end of the brush is exposed for a person to pull downward to drive the bristles to brush away the dust on the filter screen, and the top of the brush plate faces the filter screen. The net extends out with a top plate to press against the filter net, and the brush can be pulled downward until its brush plate presses against the bottom wall of the tube body so that the brush plate, the top plate, the bottom wall of the tube body and the bottom edge of the filter net together form a dust accommodating channel for accommodating dust. An air intake gap is left between the brush plate and the side wall of the tube body for gas to enter the dust accommodating channel, and a dust suction port is opened on the bottom wall of the tube body to lead to the dust accommodating channel for gas to drive the dust to be discharged out of the tube body. A dust suction pipe for connecting a negative pressure vacuum cleaner is connected downward to the dust suction port, and a valve is installed on the dust suction pipe.

[0005] Furthermore, a lateral rubber roller is rotatably mounted on the top plate, and the rubber roller of the top plate abuts against the filter screen.

[0006] Furthermore, a rubber pad is provided at the bottom of the brush plate, and the brush can be specifically pulled downward until the rubber pad of the brush plate abuts against the bottom wall of the tube body.

[0007] Furthermore, two air inlet gaps are respectively left between the brush plate and the two side walls of the tube body for gas to enter the dust containing channel.

[0008] Furthermore, a return spring is included to drive the brush to return.

[0009] Furthermore, the return spring is a tension spring, the upper end of which is connected to the tube body, and the lower end of which is connected to the lower end of the brush.

[0010] Furthermore, the return spring is sleeved on the outside of the exposed portion of the brush.

[0011] The multifunctional fire-resistant air duct filters the air through the filter screen at ordinary times. After long-term use, the maintenance personnel pull the lower end of the brush downward by hand to drive the bristles of the brush to brush away the dust on the filter screen. Before this, the maintenance personnel first connect the vacuum tube with a negative pressure vacuum cleaner and open the valve. The negative pressure vacuum cleaner generates negative pressure at the vacuum port through the vacuum tube. During dust removal, most of the dust brushed away by the bristles is either discharged directly from the vacuum port or falls between the vacuum port and the bottom edge of the filter screen under the action of negative pressure; when the brush is pulled down by a person to make the brush plate press down against the bottom wall of the tube body, the brush plate, the top plate, the bottom wall of the tube body and the bottom edge of the filter screen jointly form a dust accommodating channel, and the dust falling between the vacuum port and the bottom edge of the filter screen is located in the dust accommodating channel. The air in the tube body enters the dust accommodating channel from the air intake gap under the action of negative pressure, driving the dust in the dust accommodating channel to move along the dust accommodating channel to the vacuum port and be discharged from the vacuum port to the outside of the tube body. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the air duct.

[0013] Figure 2 This is the front view of the air duct.

[0014] Figure 3 yes Figure 2 A partial enlarged picture of Figure 2 The A part.

[0015] Figure 4 This is a cross-sectional view of the air duct.

[0016] Figure 5 yes Figure 4 A partial enlarged picture of Figure 4 Part B. DETAILED DESCRIPTION

[0017] The present invention is further described in detail below in conjunction with specific implementation methods.

[0018] Multifunctional fire-resistant air duct Figure 1 , having a tube body 1, which comprises a galvanized steel plate layer, a rock wool fireproof layer and a calcium silicate board fireproof layer from the inside to the outside, respectively, and has good fire resistance. When the air duct is in use, air enters the duct body 1 from the duct air inlet end 11, flows along the duct body 1 to the duct air outlet end 12, and is discharged from the duct air outlet end 12, in this way, air circulation is achieved. The air duct has an air filtering function, and a filter screen 2 is installed in its tube body 1. When the air flows along the duct body 1, the filter screen 2 filters out dust in the air. After the air duct has been used for a long time, the dust attached to the filter screen 2 easily clogs the filter screen 2, resulting in a decrease in ventilation efficiency. The air duct has a dust removal function, and is provided with a brush 3 for removing dust from the filter screen 2. After long-term use, maintenance personnel can use the brush 3 to brush away the dust on the filter screen 2. Brush 3 see Figure 1 , Figure 5 , including a brush plate 31 facing the filter screen 2, the brush plate 31 has bristles 32 extending toward the filter screen 2 to press against the filter screen 2, a top plate 33 extending from the top of the brush plate 31 toward the filter screen 2, a rubber roller 332 rotatingly mounted on the body 331 of the top plate 33 in the left and right directions, and the rubber roller 332 of the top plate 33 presses against the filter screen 2. A rubber pad 311 is provided at the bottom of the brush plate 31. A connecting strip 34 extends from the brush plate 31 in the direction away from the filter screen, and a connecting rod 35 is connected to the connecting strip 34. The lower end 351 of the connecting rod 35 passes through the tube body 1 downward and is exposed to the outside, serving as the lower end of the brush 3. A tension spring 4 is sleeved on the outside of the exposed part 352 of the connecting rod 35, and the upper end 41 of the tension spring 4 is connected to the tube body 1, and the lower end 42 is connected to the lower end 351 of the connecting rod 35. A dust suction port 14 is formed on the bottom wall 13 of the tube body 1 . The dust suction port 14 is located below the top plate 33 of the brush 3 . A dust suction pipe 15 is connected downwardly from the dust suction port 14 . A normally closed valve 16 is installed on the dust suction pipe 15 .

[0019] See Figure 1 , Figure 5 When removing dust, the maintenance personnel first connect the vacuum tube 15 with a negative pressure vacuum cleaner (not shown in the figure) and open the valve 16. The negative pressure vacuum cleaner generates negative pressure at the vacuum port 14 through the vacuum tube 15. After the negative pressure is generated, the maintenance personnel pull the lower end 351 of the connecting rod 35 downward by hand to drive the connecting strip 34 to move downward, thereby driving the brush plate 31, the top plate 33 and the bristles 32 on the brush plate 31 to move downward, and the bristles 32 brush away the dust on the filter screen 2. In this process: Figure 2 , Figure 5, the lower end 351 of the connecting rod 35 stretches the tension spring 4 to make it elastically deformed; the brush plate 31 moves downward close to the bottom wall 13 of the tube body 1, and the rubber roller 332 of the top plate 33 rolls with the movement of the top plate 33; most of the dust brushed away by the bristles 32 is either directly discharged from the dust suction port 14 or falls between the dust suction port 14 and the bottom edge 21 of the filter 2 under the action of negative pressure. The maintenance personnel pulls the lower end 351 of the connecting rod 35 downward until the rubber pad 311 at the bottom of the brush plate 31 presses down against the bottom wall 13 of the tube body 1, at which time the brush plate 31, the top plate 33, the bottom wall 13 of the tube body 1 and the bottom edge 21 of the filter 2 jointly form a dust accommodating channel 5. Since the dust suction port 14 is located below the top plate 33, the dust falling between the dust suction port 14 and the bottom edge 21 of the filter 2 is located in the dust accommodating channel 5, and the dust suction port 14 leads to the dust accommodating channel 5. Under the action of the negative pressure vacuum cleaner, negative pressure will be generated in the dust accommodating channel 5. See Figure 2 , Figure 3 , left and right air inlet gaps 51 and 52 are respectively left between the left and right ends 313 and 314 of the brush plate 31 and the left and right side walls 17 and 18 of the tube body 1. The air in the tube body 1 enters the dust receiving channel 5 from the left and right air inlet gaps 51 and 52 under the action of negative pressure, driving the dust in the dust receiving channel 5 to move along the dust receiving channel 5 to the dust suction port 14 and be discharged from the dust suction port 14 to the outside of the tube body 1. Figure 4 , Figure 5 As shown. After the dust is discharged, the maintenance personnel loosens the lower end 351 of the connecting rod 35, and the tension spring 4 acts as a reset spring to drive the connecting rod 35 to move upward and reset. The connecting rod 35 drives the connecting strip 34, the brush plate 31, the top plate 33 and the bristles 32 on the brush plate 31 to move upward and reset. The maintenance personnel finally releases the connection between the negative pressure vacuum cleaner and the dust suction pipe 15 and closes the valve 16, and the air duct can be used normally. Since the main body 331 of the top plate 33 is provided with a rubber roller 332, the main body 331 of the top plate 33 indirectly abuts against the filter screen 2 through the rubber roller 332 instead of directly abutting against the filter screen 2. During the up and down movement of the top plate 33, the rubber roller 332 of the top plate 33 can roll to reduce wear. Since the bottom of the brush plate 31 is provided with a rubber pad 311, after the rubber pad 311 abuts against the bottom wall 13 of the tube body 1, it is not easy for the gas in the tube body 1 to enter the dust containing channel 5 from the gap between the brush plate 31 and the bottom wall 13 of the tube body 1.

[0020] The above is only an implementation method of the invention, and does not limit the scope of patent protection. Those skilled in the art can make non-substantial changes or substitutions based on the invention, which still fall within the scope of patent protection.

Claims

1. A multifunctional fire-resistant air duct, having a pipe body for air circulation, the pipe body having a galvanized steel plate layer, a rock wool fireproof layer and a calcium silicate board fireproof layer from the inside to the outside, a filter screen for filtering air and a brush for dust removal of the filter screen are arranged in the pipe body, the brush comprises a brush plate facing the filter screen, the brush plate extends toward the filter screen and has bristles against the filter screen, the lower end of the brush is exposed for a person to pull down to drive the bristles to brush away the dust on the filter screen, and the characteristics are: The top of the brush plate extends toward the filter screen and has a top plate to press against the filter screen. The brush can be pulled downward until the brush plate presses against the bottom wall of the tube body so that the brush plate, the top plate, the bottom wall of the tube body and the bottom edge of the filter screen together form a dust accommodating channel for accommodating dust. An air intake gap is left between the brush plate and the side wall of the tube body for gas to enter the dust accommodating channel. A dust suction port is opened on the bottom wall of the tube body leading to the dust accommodating channel for gas to drive dust to be discharged out of the tube body. A dust suction pipe for connecting a negative pressure vacuum cleaner is connected downward to the dust suction port, and a valve is installed on the dust suction pipe.

2. The multifunctional fire-resistant air duct according to claim 1, characterized in that: A lateral rubber roller is rotatably mounted on the top plate, and the rubber roller of the top plate abuts against the filter screen.

3. The multifunctional fire-resistant air duct according to claim 1, characterized in that: A rubber pad is provided at the bottom of the brush plate. Specifically, the brush can be pulled downward until the rubber pad of the brush plate abuts against the bottom wall of the tube body.

4. The multifunctional fire-resistant air duct according to claim 1, characterized in that: Two air inlet gaps are respectively left between the brush plate and the two side walls of the tube body for gas to enter the dust containing channel.

5. The multifunctional fire-resistant air duct according to claim 1, characterized in that: Includes a return spring that drives the brush to return.

6. The multifunctional fire-resistant air duct according to claim 5, characterized in that: The return spring is a tension spring, the upper end of which is connected to the tube body, and the lower end of which is connected to the lower end of the brush.

7. The multifunctional fire-resistant air duct according to claim 6, characterized in that: The return spring is sleeved on the outside of the exposed part of the brush.

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