Anti-corrosion galvanized air pipe

Abstract

The utility model relates to the technical field of building fire protection, in particular to an anti-corrosion galvanized air pipe which comprises a pipe I and a pipe II, the pipe I is made of a steel plate, a zinc layer I is plated on the outer wall of the pipe I, a zinc layer II is plated on the inner wall of the pipe I, a flange I is arranged at one end of the pipe I, a flange II is arranged at one end of the pipe II, and the flange I is made of a steel plate. The first flange is provided with a mounting hole, and a mounting assembly is arranged in the mounting hole. The inner walls and the outer walls of the pipe I and the pipe II are both provided with the zinc coatings, so that the inner walls and the outer walls of the steel pipe are both protected by the zinc coatings, the double-layer zinc coatings carry out double-layer protection on the pipe I, the anti-corrosion protection on the steel pipe is better, and the installation assembly is further arranged at the connecting position of the pipe I and the pipe II. And the installation assembly is used for carrying out anti-abrasion protection on the screw installation connection position of the two parts, it is guaranteed that the zinc layer is not damaged, and the anti-corrosion effect is better.

Description

Technical Field

[0001] The utility model relates to the technical field of building fire protection, in particular to an anti-corrosion galvanized air duct. Background Art

[0002] Air duct is an important tool for fire ventilation. When using air duct, more attention is paid to the service life of the air duct. The service life of the air duct is closely related to whether the air duct is corroded. If the air duct is corroded, the service life of the air duct will be reduced. The existing anti-corrosion method is to coat the outer layer of the steel plate with a layer of zinc. Zinc has good anti-corrosion effects such as isolating oxygen and water vapor.

[0003] However, the exterior of the existing air duct has been coated with an anti-oxidation zinc layer, but the gas introduced into the air duct contains a large amount of water vapor and impurities. The interior of the air duct is a serious location for steel plate corrosion, and the existing air duct needs to be butted during installation. Bolts are generally used at the butt joint for spiral fastening, and galvanizing is not performed at the bolt connection. Galvanizing at this location may also cause damage to the galvanized layer and corrosion when the tightening bolts are rotated.

[0004] To this end, an anti-corrosion galvanized air duct is proposed, which adds two inner and outer galvanized layers for corrosion protection, thereby enhancing the anti-corrosion ability of the galvanized air duct. Utility Model Content

[0005] The purpose of the utility model is to provide an anti-corrosion galvanized air duct, by arranging a galvanized layer on the outer walls of pipe one and pipe two, so as to obtain the protection of a double zinc layer and improve the anti-corrosion ability, so as to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A corrosion-resistant galvanized air duct comprises a first tube and a second tube. The first tube is made of a steel plate, a first zinc layer is plated on the outer wall of the first tube, a second zinc layer is plated on the inner wall of the first tube, a first flange is provided at one end of the first tube, a second flange is provided at one end of the second tube, a mounting hole is provided on the first flange, and a mounting component is provided in the mounting hole.

[0008] Preferably, the mounting assembly includes an anti-wear ring and a fastening screw, the anti-wear ring is divided into an upper ring and a lower ring, the upper ring and the lower ring are threadedly connected to each other, the outer wall and the inner wall of the flange are provided with grooves, the upper ring and the lower ring are connected by passing through the mounting hole, the upper ring and the lower ring are respectively tightly attached to the inner walls of the groove, the upper ring and the lower ring are jointly provided with a through hole, and the fastening screw is threadedly connected in the through hole.

[0009] Preferably, the inner wall of the mounting hole is uniformly plated with a zinc layer, the upper ring and the lower ring are both provided with an outer ring and an inner ring, the outer ring is made of fiber material, and the inner wall at the bottom of the outer ring is provided with a thread.

[0010] Preferably, the inner ring is made of steel material, the inner wall of the inner ring is provided with threads, the rotation direction of the threads on the outer wall of the inner ring is the same as the rotation direction of the threads on the inner wall of the outer ring, and the fastening screw is threadedly connected to the inner ring.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. A galvanized layer is provided on the inner and outer walls of pipe one and pipe two, so that the inner and outer walls of the steel pipe are protected by the zinc layer. The double-layer zinc layer provides double protection for pipe one, which provides better anti-corrosion protection for the steel pipe. An installation component is also provided at the connection between pipe one and pipe two, and the installation component is used to protect the screw installation connection of the two from wear and tear, ensuring that the zinc layer is not damaged and the anti-corrosion effect is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a side structural sectional view of the utility model;

[0014] Figure 2 It is a cross-sectional view of the overall structure of the utility model;

[0015] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0016] Figure 4 This is a structural diagram of the anti-wear ring.

[0017] In the figure: 1, tube one; 2, zinc layer one; 3, tube two; 4, fastening screws; 5, flange one; 6, tube two; 7, anti-wear ring one; 701, lower ring; 702, upper ring; 8, anti-wear ring two; 9, flange two; 10, mounting hole; 11, outer ring; 12, inner ring. DETAILED DESCRIPTION

[0018] 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.

[0019] See also Figures 1 to 4 The utility model provides an anti-corrosion galvanized air duct, and the technical solution is as follows:

[0020] A corrosion-resistant galvanized air duct comprises a tube 1 and a tube 6. The tube 1 is made of steel plate, the outer wall of the tube 1 is plated with a zinc layer 2, the inner wall of the tube 1 is plated with a zinc layer 3, one end of the tube 1 is provided with a flange 5, one end of the tube 2 6 is provided with a flange 2 9, the flange 5 is provided with a mounting hole 10, and a mounting component is provided in the mounting hole 10.

[0021] During docking, insert pipe 2 6 into pipe 2 6 and fasten the docking by installing components. Zinc layer 1 2 provides corrosion protection to the outer wall of pipe 1, and zinc layer 3 provides corrosion protection to the inner wall of pipe 1.

[0022] The installation assembly includes an anti-wear ring 7 and a fastening screw 4. The anti-wear ring 7 is divided into an upper ring 702 and a lower ring 701. The upper ring 702 and the lower ring 701 are threadedly connected to each other. The outer wall and the inner wall of the flange 5 are both provided with grooves. The upper ring 702 and the lower ring 701 are passed through the installation hole 10 for connection. The upper ring 702 and the lower ring 701 are respectively tightly attached to the inner wall of the groove, so that the outer wall of the flange can maintain flatness. Before installation, the upper ring 702 and the lower ring 701 are first screwed together to the installation hole 10. The bottom wall of the upper ring 702 and the top wall of the lower ring 701 are both tightly attached to the inner wall of the groove. The upper ring 702 and the lower ring 701 are both provided with a through hole. The fastening screw 4 is threadedly connected in the through hole. After the tube 12 is inserted into the tube 11, the mounting hole 10 on the tube 26 is aligned with the mounting hole 10 on the tube 11. The inner wall of the mounting hole 10 is evenly plated with a zinc layer 2. The upper ring 702 and the lower ring 701 are both provided with an outer ring 11 and an inner ring 12. The outer ring 11 is made of fiber material, and the inner wall of the bottom of the outer ring 11 is provided with a thread. Then the fastening bolt is screwed into the through hole, and the fastening bolt is screwed to the bottom of the lower ring 701 of the tube 26 to complete the fastening connection process. In this installation process, the fastening screw 4 is not directly connected to the side wall of the mounting hole 10, which reduces the degree of damage to the zinc layer at the mounting hole 10.

[0023] When the upper ring 702 and the lower ring 701 are docked, the inner ring 12 on the lower ring 701 is screwed into the outer ring 11 on the upper ring 702, and the inner ring 12 on the upper ring 702 is flush with the inner ring 12 on the lower ring 701. At this time, the fastening screw 4 is screwed into the inner ring 12. The inner ring 12 is made of steel material, and the inner wall of the inner ring 12 is provided with a thread. The rotation direction of the thread on the outer wall of the inner ring 12 is the same as the rotation direction of the thread on the inner wall of the outer ring 11. The fastening screw 4 is threadedly connected to the inner ring 12.

[0024] The inner ring 12 is made of steel material, and the fastening screw 4 is threadedly connected to the inner ring 12, so that the threaded connection between the two has high strength and strong connection stability.

[0025] The structure of the anti-wear ring 2 8 is consistent with the structure of the anti-wear ring 1 7.

[0026] Although the 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 anti-corrosion galvanized air duct, characterized in that: include, A pipe (1) and a pipe (6), wherein the pipe (1) is made of steel plate, the outer wall of the pipe (1) is plated with a zinc layer (2), the inner wall of the pipe (1) is plated with a zinc layer (3), one end of the pipe (1) is provided with a flange (5), one end of the pipe (6) is provided with a flange (9), the flange (5) is provided with a mounting hole (10), and a mounting component is provided in the mounting hole (10), The mounting assembly comprises an anti-wear ring (7) and a fastening screw (4). The anti-wear ring (7) comprises an upper ring (702) and a lower ring (701). The upper ring (702) and the lower ring (701) are threadedly connected to each other. The outer wall and the inner wall of the flange (5) are provided with grooves. The upper ring (702) and the lower ring (701) are connected by passing through the mounting hole (10). The upper ring (702) and the lower ring (701) are respectively tightly attached to the inner wall of the groove. The upper ring (702) and the lower ring (701) are jointly provided with a through hole. The fastening screw (4) is threadedly connected in the through hole. The inner wall of the mounting hole (10) is uniformly plated with a zinc layer (2), the upper ring (702) and the lower ring (701) are both provided with an outer ring (11) and an inner ring (12), the outer ring (11) is made of fiber material, and a thread is provided on the inner wall at the bottom of the outer ring (11).

2. The anti-corrosion galvanized air duct according to claim 1, characterized in that: The inner ring (12) is made of steel material, and a thread is provided on the inner wall of the inner ring (12). The thread on the outer wall of the inner ring (12) has the same rotation direction as the thread on the inner wall of the outer ring (11). The fastening screw (4) is threadedly connected to the inner ring (12).

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