Corrosion-resistant small-caliber chimney

Abstract

The utility model provides a corrosion-resistant small-caliber chimney, and belongs to the technical field of chimney manufacturing. Comprising a plurality of coaxial and continuous pipe joints, the pipe joints are titanium steel composite plates, titanium plate surfaces of the pipe joints face the inner side, carbon steel layer removing steps are arranged on the edges of the outer walls of the two ends of each pipe joint in the circumferential direction of the pipe joints, the adjacent pipe joints are connected in a welded mode, and welding seams of the adjacent pipe joints extend to the carbon steel layer removing steps from the inner walls of the pipe joints. The pipe joints are coaxially sleeved with a connecting sleeve, the two ends of the connecting sleeve extend to the outer side of the decarburization steel layer step between the two pipe joints, and the two ends of the connecting sleeve are welded and fixed to the outer walls of the two pipe joints respectively. The carbon steel layers on the outer walls of the two ends of the pipe joints are thinned, when the two pipe joints are welded in a counterpoint mode, the weld joints can extend to the steps with the carbon steel layers removed from the inner walls of the pipe joints, the two pipe joints can be connected into a whole through the connecting sleeves located on the outer sides of the pipe joints, and the effects of prolonging the service life of the pipe joints and improving the connecting stability are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of chimney manufacturing, in particular to a corrosion-resistant small-caliber chimney. Background Art

[0002] A chimney is a structure that provides ventilation for hot flue gas or smoke from boilers, fireplaces, blast furnaces, etc. Chimneys are usually vertical to ensure smooth flow of gas. Small and medium-sized chimneys usually use composite steel plates bent into a cylindrical shape, and the connecting seams at both ends of the plate are welded to form a pipe section. Traditional chimneys are composed of multiple pipe sections connected together, and adjacent pipe sections need to be sealed to avoid chimney leakage.

[0003] However, the flue gas discharged from the chimney can easily cause corrosion to the inner wall of the pipe section. In response to this, some chimneys are made of titanium steel composite plates, which make the pipe section both corrosion-resistant and have sufficient structural strength. However, the thickness of the titanium steel composite plate is usually thick. When welding the gap after the adjacent pipe sections are aligned, due to the size of the pipe section, welding can only be performed from the outside of the pipe section. The carbon steel layer section of the titanium steel composite plate is easily exposed at the joint inside the pipe section, which is still easy to cause corrosion of the pipe section. Utility Model Content

[0004] In view of the above problems, the utility model provides a corrosion-resistant small-diameter chimney.

[0005] In order to achieve the above-mentioned invention object, the technical solution adopted by the utility model is as follows:

[0006] Provided is a corrosion-resistant small-diameter chimney, comprising a plurality of coaxial and continuously arranged pipe segments, wherein the pipe segments are titanium-steel composite plates, the titanium plate surfaces of the pipe segments face inward, and the outer wall edges at both ends of the pipe segments are provided with decarbonized steel layer steps along the circumference of the pipe segments for removing the outer carbon steel layer, the adjacent pipe segments are connected by welding, the outer coaxial sleeves of the pipe segments are provided with connecting sleeves, the two ends of the connecting sleeves extend to the outside of the decarbonized steel layer steps between the two pipe segments, and the two ends of the connecting sleeves are respectively welded and fixed to the outer walls of the two pipe segments.

[0007] Furthermore, a mounting hole is penetrated through the outer wall of the connecting sleeve, and a plurality of mounting holes are evenly spaced along the circumference of the connecting sleeve. Reinforcing ribs are inserted into the mounting holes. The width of the reinforcing ribs is the same as the steps of the decarbonized steel layer on the two pipe sections. The reinforcing ribs are welded and fixed to the connecting sleeve.

[0008] Furthermore, the reinforcing ribs include upper ribs and lower ribs, the lower ribs include a rib surface protruding from the connecting sleeve and a support plate extending into the connecting sleeve and having the same width as the steps of the carbon steel layer on the two pipe sections, a support ring is sleeved on the outer wall of the connecting sleeve, the support ring is arranged on the rib surface of the lower rib, the inner wall of the support ring is fitted with the outer wall of the connecting sleeve, the upper rib is located above the support ring, and the upper rib is welded and fixed to the connecting sleeve and the support ring at the same time.

[0009] Furthermore, the upper rib plate is used to fit the connecting sleeve and the support ring, and both side walls thereof are connected and provided with hollow grooves, and the upper rib plate covers the mounting hole above the support ring through the hollow grooves.

[0010] The beneficial effects of the utility model are as follows: by thinning the carbon steel layer on the outer wall at both ends of the pipe segment, when the two pipe segments are welded in position, the weld can extend from the inner wall of the pipe segment to the step of the carbon steel layer, so that the smoke inside the pipe segment will not corrode the carbon steel layer of the pipe segment from the gap between the pipe segments, and through the connecting sleeve located on the outside of the pipe segment, the two pipe segments can be connected as one, ensuring the connection stability of the pipe segment joint position. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the cross-sectional structure of a corrosion-resistant small-diameter chimney according to an embodiment of the present application.

[0012] Among them, 1. pipe joint; 11. decarbonizing steel layer step; 2. connecting sleeve; 3. upper rib; 31. hollow groove; 4. lower rib; 41. rib surface; 42. support plate; 5. support ring. DETAILED DESCRIPTION

[0013] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0014] The present application embodiment discloses a corrosion-resistant small-diameter chimney, referring to Figure 1 , including several sections of pipe segments 1, and multiple sections of pipe segments 1 are coaxially butt-jointed to form a chimney body. In the embodiment of the present application, the pipe segment 1 specifically adopts a titanium steel composite plate, and the pipe segment 1 is formed by rolling and then welding the joint. The titanium steel composite plate has one titanium plate surface and one carbon steel layer. The titanium plate surface of the titanium steel composite plate faces the inner side of the pipe segment 1, which plays a role in corrosion resistance. The outer wall edges at both ends of the pipe segment 1 are provided with a decarbonized steel layer step 11 along the circumference of the pipe segment 1. The decarbonized steel layer step 11 is formed by removing the carbon steel layer on the outside of the pipe segment 1. After the adjacent pipe segments 1 are aligned, the two are welded and connected by a single-sided welding and double-sided forming method. The weld between the adjacent pipe segments 1 extends from the inner wall of the pipe segment 1 to the decarbonized steel layer step 11, ensuring that the carbon steel layer section is hidden at the seam position on the inner side of the pipe segment 1 after welding.

[0015] The outer part of the pipe segment 1 is also coaxially sleeved with a connecting sleeve 2, and the two ends of the connecting sleeve 2 extend to the outside of the carbon steel layer step 11 between the two pipe segments 1, and the two ends of the connecting sleeve 2 are respectively welded and fixed to the outer walls of the two pipe segments 1. Through the connecting sleeve 2 on the outer side of the joint of the pipe segment 1, the carbon steel layer on the outer side of the adjacent pipe segment 1 can be connected as a whole, so that the connecting sleeve 2 can support the joint position of the adjacent pipe segment 1. Improve the overall structural strength of the chimney

[0016] Furthermore, a mounting hole is also formed on the outer wall of the connecting sleeve 2, and a reinforcing rib is inserted into the mounting hole. The mounting hole is formed along the axial direction of the connecting sleeve 2, and the length of the mounting hole in the axial direction of the connecting sleeve 2 is the same as the width of the decarbonized steel layer steps 11 on the two pipe sections 1 after welding. The reinforcing rib abuts against the decarbonized steel layer steps 11 between the adjacent pipe sections 1 after passing through the mounting hole on the connecting sleeve 2. The reinforcing rib is welded and fixed to the connecting sleeve 2 after passing through the connecting sleeve 2. The reinforcing rib can effectively support the joint position between the pipe sections 1, so as to improve the overall structural stability of the chimney.

[0017] Furthermore, the reinforcing ribs include an upper rib 3 and a lower rib 4. The lower rib 4 includes a rib surface 41 protruding from the connecting sleeve 2 and a support sheet 42 extending into the connecting sleeve 2 and having the same width as the carbon steel layer steps 11 on the two pipe sections 1. A support ring 5 is sleeved on the outer wall of the connecting sleeve 2. The support ring 5 is arranged on the rib surface 41 of the lower rib 4. The inner wall of the support ring 5 is fitted with the outer wall of the connecting sleeve 2. The upper rib 3 is located above the support ring 5. The upper rib 3 is welded and fixed to the connecting sleeve 2 and the support ring 5 at the same time.

[0018] When installing the chimney, first move the connecting sleeve 2 between the two pipe sections 1, align the installation hole with the decarbonized steel layer step 11 on the pipe section 1, weld the connecting sleeve 2 to the pipe section 1, and then insert the lower rib 4 into the installation hole, so that the support piece 42 of the lower rib 4 abuts against the decarbonized steel layer step 11, and weld the lower rib 4 to the connecting sleeve 2. At this time, put the supporting ring 5 on the connecting sleeve and place it on the rib surface 41 of the lower rib 4, weld the supporting ring 5 to the connecting sleeve and the lower rib 4, and preferably assemble the upper rib 3 and fix the upper rib 3. The supporting ring 5 can ensure that the supporting piece 42 on the lower rib 4 can maintain the state of abutting against the decarbonized steel layer step 11 on the pipe section 1, thereby improving its supporting effect on the joint position of the pipe section 1.

[0019] Furthermore, hollow grooves 31 are provided on both side walls of the upper rib 3 for fitting the connecting sleeve 2 and the support ring 5. After the support ring 5 is installed on the connecting sleeve 2, the support plate is extended from above the support ring 5, and then the upper rib 3 is used to cover the mounting hole above the support ring 5. The upper rib 3 is welded and fixed to the connecting sleeve 2 and the support ring 5, which can seal the mounting hole.

[0020] It should be understood by those skilled in the art that, although preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they are aware of the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention. Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A corrosion-resistant small-diameter chimney, characterized by: The invention comprises a plurality of coaxial and continuously arranged pipe segments (1), wherein the pipe segments (1) are titanium-steel composite plates, the titanium plate surface of the pipe segments (1) faces inward, and the outer wall edges at both ends of the pipe segments (1) are provided with decarbonized steel layer steps (11) along the circumference of the pipe segments (1) by removing the outer carbon steel layer, and the adjacent pipe segments (1) are connected by welding the titanium plate surfaces on both sides, and the outer coaxial sleeve of the pipe segment (1) is provided with a connecting sleeve (2), and the two ends of the connecting sleeve (2) extend to the outside of the decarbonized steel layer step (11) between the two pipe segments (1), and the two ends of the connecting sleeve (2) are respectively welded and fixed to the outer walls of the two pipe segments (1).

2. A corrosion-resistant small-diameter chimney according to claim 1, characterized in that: The outer wall of the connecting sleeve (2) is provided with a mounting hole, and a plurality of the mounting holes are evenly spaced along the circumference of the connecting sleeve (2). A reinforcing rib is inserted into the mounting hole, and the reinforcing rib has the same width as the decarbonized steel layer steps (11) on the two pipe sections (1). The reinforcing rib is fixedly connected to the connecting sleeve (2) by welding.

3. The corrosion-resistant small-diameter chimney according to claim 2, characterized in that: The reinforcing ribs include an upper rib (3) and a lower rib (4), the lower rib (4) including a rib surface (41) protruding from the connecting sleeve (2) and a support plate (42) extending into the connecting sleeve (2) and having the same width as the carbon steel layer steps (11) on the two pipe sections (1), a support ring (5) is sleeved on the outer wall of the connecting sleeve (2), the support ring (5) is arranged on the rib surface (41) of the lower rib (4), the inner wall of the support ring (5) is in contact with the outer wall of the connecting sleeve (2), the upper rib (3) is located above the support ring (5), and the upper rib (3) is welded and fixed to the connecting sleeve (2) and the support ring (5) at the same time.

4. The corrosion-resistant small-diameter chimney according to claim 3, characterized in that: The upper rib plate (3) is used to fit the connecting sleeve (2) and the supporting ring (5), and both side walls thereof are connected and provided with hollow grooves (31). The upper rib plate (3) covers the mounting hole above the supporting ring (5) through the hollow grooves (31).

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