Air duct protection equipment for civil air defense entrance

Abstract

The utility model discloses air duct protection equipment for a civil air defense entrance. The air duct protection equipment comprises a civil air defense entrance air duct pipe, mounting boxes are fixedly mounted on the two sides of the civil air defense inlet air duct pipe correspondingly, mounting shafts are rotationally mounted on the inner walls of the two mounting boxes correspondingly, and filtering protection structures are mounted on the two mounting shafts; according to the utility model, the filter screen is arranged to be crawler-shaped so as to realize a double-layer filtering effect, and is arranged in the civil air defense inlet air duct pipe so as to filter dust in air and prevent large impurities and foreign matters from entering, so that the protection effect on the civil air defense inlet air duct pipe is improved, and the exhaust fan blades can rotate to exhaust air by starting the motor so as to promote ventilation; meanwhile, the filter screen moves circularly, the circularly moving filter screen can drive the side with dust to move into the mounting box and rub with the brush plate to sweep down the dust, sweeping work is carried out in the mounting box, and the situation that the swept dust is sucked into the civil air defense inlet air duct pipe during ventilation can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of air duct protection equipment for civil air defense, in particular to air duct protection equipment for civil air defense entrances. Background Art

[0002] Air ducts for civil air defense entrances are an important part of civil air defense projects, mainly for ventilation, regulating indoor and outdoor airflow, and anti-pollution. These air ducts are designed to ensure that the air quality in personnel shelters and other civil air defense facilities is maintained during wartime or emergencies, while preventing harmful gases and floating dust from entering the indoor environment.

[0003] In the prior art, a patent with publication number CN218652770U discloses an air duct protection device for a civil air defense entrance, comprising an inlet air duct pipe body, an exhaust mechanism is arranged inside the inlet air duct pipe body, a vibrating self-cleaning filter is arranged at the bottom end of the inner part of the inlet air duct pipe body, the vibrating self-cleaning filter comprises a mounting ring, a bottom surface of the mounting ring is fixedly connected to an impact ring, a filter frame which can move up and down and can intermittently impact with the impact ring is arranged below the mounting ring, a filter ring net is fixedly connected to the inner wall of the filter frame, a shaft sleeve is arranged at the center of the filter ring net, and two cleaning brushes which can rotate and clean the bottom surface of the filter ring net are symmetrically arranged on the outer wall of the bottom end of the shaft sleeve, the device has a simple structure, and through the coordinated operation of the vibration trigger mechanism and the vibrating self-cleaning filter, the filter blockage of the filter ring net can be better avoided, thereby effectively improving the ventilation effect of the inlet air duct pipe body.

[0004] However, the cleaning process of the cleaning brush is carried out inside the inlet air duct pipe body. While the filter ring net is being cleaned, the fan blade body will rotate and draw air into the inlet air duct pipe body, causing some of the dust swept away to be easily re-sucked into the air duct pipe under the action of the fan blade body, thereby reducing the cleaning effect. Therefore, a duct protection device for civil air defense entrance is needed to meet people's needs. Utility Model Content

[0005] The purpose of the utility model is to provide an air duct protection device for a civil air defense entrance to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an air duct protection device for a civil air defense entrance, comprising a civil air defense entrance air duct pipe; both sides of the civil air defense entrance air duct pipe are fixedly installed with installation boxes, the inner walls of the two installation boxes are rotatably installed with installation shafts, and the two installation shafts are installed with filtering protection structures, the inner wall of the civil air defense entrance air duct pipe is fixedly installed with a support plate, and the support plate is installed with a ventilation structure, both sides of the two installation boxes are movably installed with positioning rods, and the same recovery structure is installed on the two positioning rods located on the same side;

[0007] The filtering protection structure includes two connecting seats, which are respectively fixedly mounted on the inner walls of the two mounting boxes, one ends of the two mounting shafts are respectively rotatably mounted on the two connecting seats, the two mounting shafts are fixedly sleeved with transmission rollers, two transmission belts are transmission-mounted on the two transmission rollers, the same filter is fixedly mounted on the side of the two transmission belts close to each other, the filter is movably mounted in the air duct pipe at the entrance of the air defense, the filter is movably mounted on the two transmission rollers, two guide rods are fixedly mounted on the inner walls of the two mounting boxes, two brush plates are slidably mounted on the two guide rods on the same side, the four brush plates are all in contact with the filter, a U-shaped frame is fixedly mounted on one side of the air duct pipe at the entrance of the air defense, a motor is fixedly mounted on one side of the U-shaped frame, a transmission wheel is fixedly mounted on one end of the corresponding mounting shaft and the output end of the motor, and the same belt is transmission-mounted on the two transmission wheels.

[0008] Preferably, the ventilation structure includes an exhaust fan blade, which is rotatably mounted on one side of a support plate. A rotating shaft is provided on one side of the exhaust fan blade, and the rotating shaft of the exhaust fan blade passes through the support plate and is fixedly mounted with a first bevel gear. A transmission shaft is fixedly mounted on one side of a transmission wheel, and the transmission shaft is rotatably mounted on the inner wall of the air duct pipe at the entrance of the civil air defense, and a second bevel gear is fixedly mounted on one end of the transmission shaft, and the second bevel gear is meshed with the first bevel gear.

[0009] Preferably, the recovery structure comprises a recovery box, which is fixedly mounted on a side where the two positioning rods are close to each other, and is located at a bottom side of the installation box and the filter screen, and is communicated with the installation box.

[0010] Preferably, a positioning hole is formed on the inner wall of the positioning rod, a positioning block is slidably installed in the positioning hole, and the positioning block is fixedly installed on one side of the installation box.

[0011] Preferably, a screw rod is movably mounted on the positioning rod, a mounting screw hole is provided on the positioning block, and one end of the screw rod passes through the positioning rod and is threadedly mounted in the mounting screw hole.

[0012] Preferably, the brush plate is provided with two sliding holes, and two guide rods are respectively slidably installed in the two sliding holes, and two springs are slidably sleeved on the two guide rods, and one end of the two springs located on the same side are fixedly installed on the inner wall of the installation box, and the other ends of the two springs located on the same side are respectively fixedly installed on one side of the two brush plates.

[0013] Preferably, two movable holes are provided on both sides of the air duct pipe at the civil air defense entrance, and the transmission belt and the filter screen are movably installed in the four movable holes.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] (1) The utility model can achieve a double-layer filtering effect by configuring the filter to be in the shape of a crawler. When installed in the air duct at the entrance of the air defense, the dust in the air can be filtered to prevent large impurities and foreign objects from entering, thereby improving the protective effect of the air duct at the entrance of the air defense. By turning on the motor, the exhaust fan blades can rotate to extract air, thereby promoting ventilation and making the filter to move in a circular motion. The circular motion of the filter can drive the dusty side to move into the installation box and rub against the brush plate to clean the dust off. The cleaning work is carried out in the installation box, thereby preventing the dust cleaned during ventilation from being sucked into the air duct at the entrance of the air defense.

[0016] (2) The dust swept down will fall into the recycling box for centralized storage. The position restriction of the recycling box can be released by unscrewing the screw at the corresponding position. At this time, the recycling box can be pulled out from the bottom of the installation box to dump the dust in the recycling box for subsequent use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a three-dimensional structural schematic diagram of an air duct protection device for a civil air defense entrance proposed by the utility model;

[0018] Figure 2 This is a schematic diagram of the filter structure of an air duct protection device for a civil air defense entrance proposed by the utility model;

[0019] Figure 3 This is a schematic diagram of the drive roller connection structure of the air duct protection device for civil air defense entrance proposed by the utility model;

[0020] Figure 4 This is a schematic diagram of the exhaust fan blade structure of an air duct protection device for a civil air defense entrance proposed by the utility model;

[0021] Figure 5 This is a schematic diagram of the structure of a recovery box of an air duct protection device for a civil air defense entrance proposed by the utility model;

[0022] Figure 6 The utility model is a schematic diagram of the movable hole structure of the air duct protection equipment for the civil air defense entrance.

[0023] In the figure: 1. Air duct at the entrance of civil air defense; 2. Installation box; 3. Installation shaft; 31. Drive roller; 32. Drive belt; 33. Filter; 34. Guide rod; 35. Brush plate; 36. U-shaped frame; 37. Motor; 38. Drive wheel; 39. Belt; 310. Sliding hole; 311. Spring; 312. Connecting seat; 313. Movable hole; 4. Support plate; 41. Fan blade; 42. First bevel gear; 43. Drive shaft; 44. Second bevel gear; 5. Positioning rod; 51. Recovery box; 52. Positioning hole; 53. Positioning block; 54. Screw; 55. Mounting screw hole. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in 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 in 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.

[0025] Example 1: Please refer to Figure 1-6 The utility model provides a technical solution: an air duct protection device for a civil air defense entrance, comprising a civil air defense entrance air duct pipe 1; installation boxes 2 are fixedly installed on both sides of the civil air defense entrance air duct pipe 1, installation shafts 3 are rotatably installed on the inner walls of the two installation boxes 2, and filtering protection structures are installed on the two installation shafts 3; a support plate 4 is fixedly installed on the inner wall of the civil air defense entrance air duct pipe 1, and a ventilation structure is installed on the support plate 4; positioning rods 5 are movably installed on both sides of the two installation boxes 2, and the same recovery structure is installed on the two positioning rods 5 on the same side;

[0026] The filtering protection structure includes two connecting seats 312, and the two connecting seats 312 are respectively fixedly mounted on the inner walls of the two mounting boxes 2, one end of the two mounting shafts 3 is rotatably mounted on the two connecting seats 312, and the two mounting shafts 3 are fixedly sleeved with a transmission roller 31, and two transmission belts 32 are transmission-mounted on the two transmission rollers 31, and the same filter screen 33 is fixedly mounted on the side close to each other of the two transmission belts 32, and the filter screen 33 is movably mounted in the air duct pipe 1 at the entrance of the civil air defense, and the filter screen 33 is movably mounted on the two transmission rollers 31, and two guide rods 34 are fixedly mounted on the inner walls of the two mounting boxes 2, and two brush plates 35 are slidably mounted on the two guide rods 34 located on the same side, and the four brush plates 35 are all in contact with the filter screen 33, and a U-shaped frame 36 is fixedly mounted on one side of the air duct pipe 1 at the entrance of the civil air defense, and a motor 37 is fixedly mounted on one side of the U-shaped frame 36, and a transmission wheel 38 is fixedly mounted on one end of the corresponding mounting shaft 3 and the output end of the motor 37, and the same belt 39 is transmission-mounted on the two transmission wheels 38. By The filter 33 is designed to be track-mounted so that it can form a double layer. It is arranged in the civil air defense entrance air duct 1 to filter dust in the air and block the entry of foreign matter. When in use, the motor 37 can be turned on, and the output end of the motor 37 can drive the transmission wheel 38 to rotate. Through the transmission cooperation between the two transmission wheels 38 and the belt 39, the two transmission wheels 38 can rotate at the same time, thereby driving one of the installation shafts 3 to rotate. The rotating installation shaft 3 drives one of the transmission rollers 31 to rotate. Through the transmission cooperation between the two transmission rollers 31 and the transmission belt 32, the two transmission rollers 31 can rotate at the same time, and the transmission belt 32 drives the filter 33 to perform a circular motion. The circularly moving filter 33 can move the side with dust attached to it into the installation box 2 through the movable hole 313. During the process, the filter 33 will come into contact with the two brush plates 35, so that the dust attached to the filter 33 can be cleaned off. The cleaning process is carried out in the installation box 2 to prevent the cleaned dust from being sucked into the civil air defense entrance air duct 1.

[0027] In order to promote the ventilation effect of the air duct pipe 1 at the entrance of the civil air defense, the ventilation structure includes an exhaust fan blade 41, which is rotatably installed on one side of the support plate 4. A rotating shaft is provided on one side of the exhaust fan blade 41. The rotating shaft of the exhaust fan blade 41 passes through the support plate 4 and is fixedly installed with a first bevel gear 42. A transmission shaft 43 is fixedly installed on one side of the transmission wheel 38. The transmission shaft 43 is rotatably installed on the inner wall of the air duct pipe 1 at the entrance of the civil air defense, and a second bevel gear 44 is fixedly installed on one end of the transmission shaft 43. The second bevel gear 44 is meshed with the first bevel gear 42. The rotating transmission wheel 38 can drive the second bevel gear 44 to rotate through the transmission shaft 43, so that the second bevel gear 44 drives the first bevel gear 42 to rotate by meshing with the first bevel gear 42, and the rotating first bevel gear 42 drives the exhaust fan blade 41 to rotate through the rotating shaft of the exhaust fan blade 41. The rotating exhaust fan blade 41 can draw air into the air duct pipe 1 at the entrance of the civil air defense to promote ventilation.

[0028] In order to make the brush plate 35 close to the filter screen 33, two sliding holes 310 are provided on the brush plate 35, and two guide rods 34 are slidably installed in the two sliding holes 310 respectively. Two springs 311 are slidably sleeved on the two guide rods 34, and one end of the two springs 311 on the same side are fixedly installed on the inner wall of the installation box 2, and the other ends of the two springs 311 on the same side are fixedly installed on one side of the two brush plates 35 respectively. By setting the sliding holes 310 and the guide rods 34, the brush plate 35 can be guided to avoid its deviation. Under the action of the springs 311, the brush plate 35 can be close to the filter screen 33 to avoid loosening and affecting the cleaning effect.

[0029] In order to enable the filter 33 to be moved out of the civil air defense entrance air duct pipe 1, two movable holes 313 are opened on both sides of the civil air defense entrance air duct pipe 1, and the transmission belt 32 and the filter 33 are movably installed in the four movable holes 313. The circularly moving filter 33 can move the side with dust attached to it into the installation box 2 through the movable holes 313.

[0030] Example 2: Figure 1-5In order to facilitate the centralized treatment of the swept dust, a recycling structure is arranged on the positioning rod 5, and the recycling structure includes a recycling box 51, which is fixedly installed on the side where the two positioning rods 5 are close to each other. The recycling box 51 is located at the bottom side of the installation box 2 and the filter screen 33, and the recycling box 51 is connected to the installation box 2. A positioning hole 52 is opened on the inner wall of the positioning rod 5, and a positioning block 53 is slidably installed in the positioning hole 52. The positioning block 53 is fixedly installed on one side of the installation box 2. A screw 54 is movably installed on the positioning rod 5, and a mounting screw hole is opened on the positioning block 53. 55, one end of the screw rod 54 passes through the positioning rod 5 and is threadedly installed in the mounting screw hole 55. The cleaned dust will fall into the recovery box 51 through the mounting box 2 for recovery. When it needs to be dumped, the corresponding screw rod 54 can be rotated to screw it out from the mounting screw hole 55. At this time, the connection restriction between the positioning rod 5 and the positioning block 53 can be released, and then the recovery box 51 can be pushed so that the recovery box 51 drives the positioning rod 5 to disengage from the positioning block 53, and the recovery box 51 can be taken out to dump the stored dust for subsequent use. The remaining features are the same as those in Example 1.

[0031] The working principle is as follows: by designing the filter screen 33 to be track-mounted, it can form a double layer, and it is arranged in the civil air defense entrance air duct 1 to filter dust in the air and block the entry of foreign matter. When in use, the motor 37 can be turned on, and the output end of the motor 37 can drive the transmission wheel 38 to rotate. The rotating transmission wheel 38 can drive the second bevel gear 44 to rotate through the transmission shaft 43, so that the second bevel gear 44 drives the first bevel gear 42 to rotate by meshing with the first bevel gear 42, and the rotating first bevel gear 42 drives the exhaust fan blade 41 to rotate through the rotating shaft of the exhaust fan blade 41. The rotating exhaust fan blade 41 can draw air into the civil air defense entrance air duct 1 to promote ventilation. Through the transmission cooperation between the two transmission wheels 38 and the belt 39, the two transmission wheels 38 can rotate at the same time, thereby driving one of the installation shafts 3 to rotate, and the rotating installation shaft 3 drives one of the transmission rollers 31 to rotate. The transmission cooperation between the transmission rollers 31 and the transmission belt 32 enables the two transmission rollers 31 to rotate at the same time, and the transmission belt 32 drives the filter screen 33 to make a circular motion. The circularly moving filter screen 33 can move the side with dust attached to it into the installation box 2 through the movable hole 313. During the process, the filter screen 33 will come into contact with the two brush plates 35, so that the dust attached to the filter screen 33 can be swept down. The cleaning process is carried out in the installation box 2 to prevent the cleaned dust from being sucked into the civil air defense entrance air duct 1. The cleaned dust will fall into the recovery box 51 through the installation box 2 for recovery. When it needs to be dumped, the corresponding screw 54 can be rotated to screw it out from the installation screw hole 55. At this time, the connection restriction between the positioning rod 5 and the positioning block 53 can be released, and then the recovery box 51 is pushed, so that the recovery box 51 drives the positioning rod 5 to disengage from the positioning block 53, and the recovery box 51 can be taken out to dump the stored dust for subsequent use.

[0032] 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. An air duct protection device for a civil air defense entrance, comprising a civil air defense entrance air duct pipe (1); characterized in that: The two sides of the air duct pipe (1) at the air defense entrance are fixedly mounted with installation boxes (2), the inner walls of the two installation boxes (2) are rotatably mounted with installation shafts (3), the two installation shafts (3) are mounted with filtering protection structures, the inner wall of the air duct pipe (1) at the air defense entrance is fixedly mounted with a support plate (4), the support plate (4) is mounted with a ventilation structure, the two sides of the two installation boxes (2) are movably mounted with positioning rods (5), and the two positioning rods (5) located on the same side are mounted with the same recovery structure; The filtering protection structure comprises two connecting seats (312), the two connecting seats (312) are respectively fixedly mounted on the inner walls of the two mounting boxes (2), one end of the two mounting shafts (3) are respectively rotatably mounted on the two connecting seats (312), the two mounting shafts (3) are both fixedly sleeved with a transmission roller (31), the two transmission rollers (31) are transmission-mounted with two transmission belts (32), the two transmission belts (32) are fixedly mounted on one side close to each other with a same filter screen (33), the filter screen (33) is movably mounted in the air duct (1) at the entrance of the air defense system, and the filter screen (33) is movably mounted on the two transmission belts (32). Two guide rods (34) are fixedly mounted on the inner walls of the two installation boxes (2), two brush plates (35) are slidably mounted on the two guide rods (34) on the same side, and the four brush plates (35) are in contact with the filter screen (33). A U-shaped frame (36) is fixedly mounted on one side of the air duct pipe (1) at the entrance of the air defense system, and a motor (37) is fixedly mounted on one side of the U-shaped frame (36). A transmission wheel (38) is fixedly mounted on one end of a corresponding installation shaft (3) and the output end of the motor (37), and the same belt (39) is installed on the two transmission wheels (38) for transmission.

2. The air duct protection device for civil air defense entrance according to claim 1 is characterized in that: The ventilation structure comprises an exhaust fan blade (41), the exhaust fan blade (41) is rotatably mounted on one side of the support plate (4), a rotating shaft is provided on one side of the exhaust fan blade (41), the rotating shaft of the exhaust fan blade (41) passes through the support plate (4) and is fixedly mounted with a first bevel gear (42), a transmission shaft (43) is fixedly mounted on one side of the transmission wheel (38), the transmission shaft (43) is rotatably mounted on the inner wall of the air duct pipe (1) at the entrance of the air defense system, a second bevel gear (44) is fixedly mounted on one end of the transmission shaft (43), and the second bevel gear (44) is meshed with the first bevel gear (42).

3. The air duct protection device for civil air defense entrance according to claim 1, characterized in that: The recovery structure comprises a recovery box (51), the recovery box (51) being fixedly mounted on a side where the two positioning rods (5) are close to each other, the recovery box (51) being located at the bottom side of the installation box (2) and the filter screen (33), and the recovery box (51) being connected to the installation box (2).

4. The air duct protection device for civil air defense entrance according to claim 1, characterized in that: The inner wall of the positioning rod (5) is provided with a positioning hole (52), a positioning block (53) is slidably installed in the positioning hole (52), and the positioning block (53) is fixedly installed on one side of the installation box (2).

5. The air duct protection device for civil air defense entrance according to claim 1 is characterized in that: A screw rod (54) is movably mounted on the positioning rod (5), a mounting screw hole (55) is provided on the positioning block (53), and one end of the screw rod (54) passes through the positioning rod (5) and is threadedly mounted in the mounting screw hole (55).

6. The air duct protection device for civil air defense entrance according to claim 1 is characterized in that: The brush plate (35) is provided with two sliding holes (310), and the two guide rods (34) are respectively slidably mounted in the two sliding holes (310). The two guide rods (34) are both slidably sleeved with two springs (311), one end of the two springs (311) located on the same side is fixedly mounted on the inner wall of the mounting box (2), and the other ends of the two springs (311) located on the same side are respectively fixedly mounted on one side of the two brush plates (35).

7. The air duct protection device for civil air defense entrance according to claim 1, characterized in that: Two movable holes (313) are provided on both sides of the air duct pipe (1) at the civil air defense entrance, and the transmission belt (32) and the filter screen (33) are movably installed in the four movable holes (313).

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