Air pipe dustproof device

Abstract

The utility model relates to the technical field of dustproof devices, and provides an air duct dustproof device which comprises a mounting frame, a blocking plate and a blocking piece, the mounting frame comprises first angle steel, second angle steel and a rotating shaft, the first angle steel and the second angle steel define a square frame, and notches are formed in the two sides of the inner side of the first angle steel and the two sides of the inner side of the second angle steel. The rotating shaft is mounted between the first angle steel and the second angle steel, the blocking plate is mounted in the notch of the mounting frame, and the blocking piece is mounted at the junction of the first angle steel and the second angle steel; the air duct has the advantages that the problems that the air duct can be transported to the site to be installed only when the two ends of the air duct are blocked through plastic films, the plastic films are prone to being damaged in the transportation process, dust enters the air duct to pollute the inner wall of the air duct, and the plastic films serve as construction waste to pollute the environment are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of dustproof devices, in particular to an air duct dustproof device. Background Art

[0002] Air ducts are piping systems used for air transportation and distribution. In practical projects, air ducts in clean areas must be cleaned after processing and then sealed with plastic film at both ends before being transported to the installation site. However, plastic film is easily damaged during transportation, allowing dust to enter the air duct and contaminate the inner wall. Furthermore, plastic film, as construction waste, pollutes the environment. Therefore, a dust-proof device for air ducts is urgently needed to address these issues. Utility Model Content

[0003] In response to the above-mentioned technical problems existing in the prior art, a dust-proof device for air ducts is provided, which solves the problem that the air ducts must be sealed at both ends with plastic film before they can be transported to the site for installation, and the plastic film is easily damaged during transportation, dust will enter the air duct and pollute the inner wall of the air duct, and the plastic film will pollute the environment as construction waste.

[0004] The purpose and effect of this utility model are achieved by the following specific technical means:

[0005] A dust-proof device for an air duct comprises: an installation frame, a blocking plate and a blocking member, the installation frame comprising a first angle steel, a second angle steel and a rotating shaft, the first angle steel and the second angle steel forming a square frame, and notches are provided on both inner sides of the first angle steel and the second angle steel, the rotating shaft is installed between the first angle steel and the second angle steel, the blocking plate is installed in the notch of the installation frame, and the blocking member is installed at the junction of the first angle steel and the second angle steel.

[0006] Preferably, the blocking plate comprises a sealing strip and a blocking plate, the sealing strip is adhered to the inner wall of the notch around, and the blocking plate is embedded in the notch and in contact with the sealing strip.

[0007] Preferably, the sealing plate includes a PVC filler plate and a metal plate bonded together, and the PVC filler plate and the metal plate are distributed inside and outside and are both located in the notch, and the PVC filler plate is in contact with the sealing strip.

[0008] Preferably, the blocking member includes an elastic clip and two connecting plates, the two connecting plates are respectively welded to the first angle steel and the second angle steel and are located at the junction of the first angle steel and the second angle steel, and the two connecting plates are each provided with a slot, and the elastic clip is clipped into the two slots.

[0009] Preferably, the elastic clamping part includes an inner rod, a limit block, a soft sleeve and a spring. The soft sleeve is sleeved on the outside of the inner rod and both are located in the clamping groove. There are several springs and they are all fixed between the soft sleeve and the inner rod. Two of the clamping grooves are extended from the upper and lower ends of the inner rod respectively. There are two limit blocks and they are respectively fixed at the two ends of the inner rod, and the limit blocks are in contact with the outer wall of the adjacent connecting plate.

[0010] Compared with the prior art, the beneficial effects of the present invention are:

[0011] When used, the dust-proof device can effectively prevent dust from entering the air duct during transportation. The sealing plate and the installation frame are made of hard materials with high hardness and are not easy to be damaged. The installation frame is a detachable structure, which is convenient for the staff to install the dust-proof device together with the flange on the air duct, or to remove it from the flange on the air duct. In addition, the sealing plate and the installation frame are detachable, which is convenient for the staff to replace the sealing plate in time after it is damaged. When part of the structure of the dust-proof device is damaged, there is no need to replace it as a whole, which can save costs. The device is detachable and reused. Long-term use of the device can reduce the cost of air duct sealing, and the dust-proof device has very little pollution to the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the disassembled structure of the air duct and dustproof device of the utility model;

[0013] Figure 2 This is a schematic diagram of the structure of the dustproof device of the utility model after being installed on the air duct;

[0014] Figure 3 This is a schematic diagram of the partial structure of the air duct, flange and installation frame in the main view;

[0015] Figure 4 This is a schematic diagram of the inner structure of the dustproof device of the present invention;

[0016] Figure 5 This is a schematic side sectional structural diagram of the blocking member of the present invention;

[0017] Figure 6 This is a schematic diagram of the top view of the connecting plate of the present invention;

[0018] Figure 7 This is a schematic diagram of the top view of the blocking member of the present invention.

[0019] Markings in the figure: mounting frame 1, first angle steel 11, second angle steel 12, rotating shaft 13, notch 14, blocking piece 2, connecting plate 21, slot 211, elastic clamping piece 22, inner rod 221, limit block 222, soft cover 223, spring 224, sealing strip 3, blocking plate 4, PVC filler plate 41, metal plate 42, air duct 5, flange 6. DETAILED DESCRIPTION

[0020] See also Figure 1-7 , further illustrate the embodiments of the present utility model;

[0021] like Figure 1-3 As shown, a duct dust prevention device includes a mounting frame 1, a blocking plate and a blocking member 2. The mounting frame 1 includes a first angle steel 11, a second angle steel 12 and a rotating shaft 13. The first angle steel 11 and the second angle steel 12 form a square frame to match the square duct 5 and the square flange 6. The first angle steel 11 and the second angle steel 12 can also be designed as arc-shaped steel to match the circular duct 5 and the circular flange 6. The first angle steel 11 and the second angle steel 12 are both provided with notches 14 on the inner sides. The rotating shaft 13 is installed on Between the first angle steel 11 and the second angle steel 12, in order to facilitate the installation frame 1 to be rotated open or closed, the blocking plate is installed in the notch 14 of the installation frame 1. The blocking plate can be made of a seal and hard plastic or a metal plate. The blocking member 2 is installed at the junction of the first angle steel 11 and the second angle steel 12, so that the first angle steel 11 and the second angle steel 12 are blocked together; when the dustproof device is installed on the air duct 5, the blocking member 2 is opened, and then the first angle steel 11 is rotated. The staff can put the installation frame 1 on the outside of the flange 6, When the flange 6 is located in the notch 14, the sealing plate is placed in the notch 14, and the sealing plate will fit tightly with the flange 6. Then the first angle steel 11 is screwed back to its original position, and the first angle steel 11 and the second angle steel 12 are sealed together by the sealing piece 2, so that one end of the air duct 5 is sealed, and the other end of the air duct 5 can also be sealed according to the above operation, which can effectively prevent dust from entering the air duct 5 during transportation. The sealing plate and the mounting frame 1 are both made of hard material with high hardness and are not easy to be damaged. The mounting frame 1 is a detachable structure, which is convenient for the staff to install the dustproof device together with the flange 6 on the air duct 5 or to remove it from the flange 6 on the air duct 5. In addition, the sealing plate and the mounting frame 1 are detachable, which is convenient for the staff to replace the sealing plate in time after it is damaged. When part of the structure of the dustproof device is damaged, there is no need to replace it as a whole, which can save costs. The device is detachable and reused. Long-term use of the device can reduce the cost of sealing the air duct 5, and the dustproof device has minimal pollution to the environment.

[0022] like Figure 3 and 4As shown, the sealing plate includes a sealing strip 3 and a sealing plate 4. The sealing strip 3 is bonded to the inner wall of the slot 14, and the sealing plate 4 is embedded in the slot 14 and in contact with the sealing strip 3. The sealing plate 4 includes a PVC filler plate 41 and a metal plate 42 bonded together. The PVC filler plate 41 has good chemical stability and can resist the corrosion of various chemical substances. The metal plate 42 can be a thin steel plate, an aluminum alloy plate or other metal plate with high hardness. The PVC filler plate 41 and the metal plate 42 are distributed inside and outside and are both located in the slot 14, thereby extending the service life of the sealing plate 4. The PVC filler plate 41 is in contact with the sealing strip 3 to fill the gap in the slot 14.

[0023] like Figure 4-7 As shown, the blocking member 2 includes an elastic clamping member 22 and two connecting plates 21. The two connecting plates 21 are respectively welded to the first angle steel 11 and the second angle steel 12 and are located at the junction of the first angle steel 11 and the second angle steel 12. The two connecting plates 21 are each provided with a clamping groove 211. The elastic clamping member 22 is clamped in the two clamping grooves 211, thereby blocking the first angle steel 11 and the second angle steel 12 together.

[0024] The elastic clamping member 22 includes an inner rod 221, a stopper 222, a soft sleeve 223, and a spring 224. The soft sleeve 223 is sleeved on the outside of the inner rod 221, and both are located in the clamping groove 211. A plurality of springs 224 are provided and are fixed between the soft sleeve 223 and the inner rod 221. Two clamping grooves 211 extend from the upper and lower ends of the inner rod 221, respectively. Two stoppers 222 are provided and are fixed to the two ends of the inner rod 221, and the stoppers 222 are in contact with the outer wall of the adjacent connecting plate 21.

[0025] When the device is in use, pinch the two limit blocks 222 by hand and pull them outwards. During this process, the soft cover 223 and the spring 224 inside it will undergo elastic deformation, and then the elastic clamping member 22 can be moved out of the two card slots 211, releasing the limit between the first angle steel 11 and the second angle steel 12. Then rotate the first angle steel 11, and the first angle steel 11 will drive the rotating shaft 13 to rotate on the second angle steel 12, so that the device can be moved to the flange 6 of the air duct 5, so that the opened installation frame 1 is sleeved on the flange 6, and the flange 6 will enter the notch 14 and contact the sealing strip 3. Then, the blocking plate 4 is embedded in the notch 14, so that the blocking plate 4 can contact the flange 6 and the sealing strip 3. At this time, the first angle steel 11 is rotated. When rotated back to their original positions, the two connecting plates 21 will be parallel to each other, and the slots 211 on the two connecting plates 21 will correspond to each other. Pinch the soft cover 223 and deform the soft cover 223 and the spring 224 to facilitate the soft cover 223 and the inner rod 221 to enter the two slots 211. After the connection is completed, the two limit blocks 222 will be respectively limited to the outside of the two connecting plates 21 of the connecting plate 21, thereby strengthening the stability of the soft cover 223 and the inner rod 221 in the two slots 21. After installing the above operation, the dustproof device is used to seal the other end of the air duct 5. The operation is simple and convenient for the staff to operate. The device is detachable and reusable. Long-term use of the device can reduce the cost of blocking the air duct 5, and the dustproof device has minimal pollution to the environment.

Claims

1. A dust-proof device for an air duct, characterized in that: include: The invention relates to a mounting frame (1), a blocking plate and a blocking member (2), wherein the mounting frame (1) comprises a first angle steel (11), a second angle steel (12) and a rotating shaft (13), wherein the first angle steel (11) and the second angle steel (12) form a square frame, and notches (14) are provided on both inner sides of the first angle steel (11) and the second angle steel (12), the rotating shaft (13) is installed between the first angle steel (11) and the second angle steel (12), the blocking plate is installed in the notch (14) of the mounting frame (1), and the blocking member (2) is installed at the junction of the first angle steel (11) and the second angle steel (12).

2. The air duct dust prevention device according to claim 1, characterized in that: The sealing plate comprises a sealing strip (3) and a sealing plate (4); the sealing strip (3) is bonded to the inner wall of the notch (14) and the sealing plate (4) is embedded in the notch (14) and in contact with the sealing strip (3).

3. The air duct dust prevention device according to claim 2, characterized in that: The sealing plate (4) comprises a PVC filler plate (41) and a metal plate (42) bonded together, wherein the PVC filler plate (41) and the metal plate (42) are distributed inside and outside and are both located in the notch (14), and the PVC filler plate (41) is in contact with the sealing strip (3).

4. The air duct dust prevention device according to claim 1, characterized in that: The blocking member (2) comprises an elastic clamping member (22) and two connecting plates (21), wherein the two connecting plates (21) are respectively welded to the first angle steel (11) and the second angle steel (12) and are located at the junction of the first angle steel (11) and the second angle steel (12), and the two connecting plates (21) are both provided with a clamping groove (211), and the elastic clamping member (22) is clamped in the two clamping grooves (211).

5. The air duct dust prevention device according to claim 4, characterized in that: The elastic clamping member (22) comprises an inner rod (221), a limiting block (222), a soft sleeve (223) and a spring (224); the soft sleeve (223) is sleeved on the outside of the inner rod (221) and both are located in the clamping groove (211); a plurality of springs (224) are provided and are fixed between the soft sleeve (223) and the inner rod (221); and two of the clamping grooves (211) are extended from the upper and lower ends of the inner rod (221); two limiting blocks (222) are provided and are fixed at the two ends of the inner rod (221), and the limiting blocks (222) are in contact with the outer wall of the adjacent connecting plate (21).

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