Stainless steel pipes, stainless steel pipe forming methods and residential stainless steel flues

Abstract

The present invention relates to a stainless steel pipe, a forming method for a stainless steel pipe, and a residential stainless steel flue, aiming to address the problem of poor residential living experience. The stainless steel pipe, installed in a building and used to exhaust flue gas, comprises a pipe body and a reinforcing rib unit. The pipe body has a flue gas flow path, mounting portions are provided at both ends of the pipe body, and the reinforcing rib unit is formed by outward projections from the sidewalls of the pipe body and / or inward depressions from the sidewalls of the pipe body. The thickness of the pipe body is 0.8 mm or less and 5 mm or less, and the thickness of the reinforcing rib unit is 0.8 mm or less and 20 mm or less.

Description

Technical Field

[0001] The invention relates to a stainless steel pipe, a forming method of the stainless steel pipe and a residential stainless steel flue. Background Art

[0002] Some existing flues are made of metal. Metal flues offer advantages such as reduced building footprint, prefabrication, and shorter construction times. These flues consist of at least two sections of metal pipes, welded together. Exhaust valves are attached to the corresponding pipes. These valves discharge smoke from the range hood into the pipes, which then exhaust the smoke through a hood on the roof and out of the building. However, these existing metal pipes can make noise during smoke discharge, significantly impacting the user experience. Summary of the Invention

[0003] The problem to be solved by the present invention is to provide a stainless steel pipe, a forming method of a stainless steel pipe and a residential stainless steel flue, so as to solve the problem of poor living experience of users in a residence.

[0004] In order to solve the above problems, the present invention provides the following technical solutions:

[0005] A stainless steel pipe, installed in a building and used for exhausting flue gas, comprises a pipe body and a reinforcing rib unit. The pipe body has a flue gas flow channel. Mounting portions are provided at both ends of the pipe body. The reinforcing rib unit is formed by the side wall of the pipe body protruding outward, and / or the reinforcing rib unit is formed by the side wall of the pipe body being recessed inward. The thickness of the pipe body is 0.8 mm ≤ ≤ 5 mm, and the thickness of the reinforcing rib unit is 0.8 mm ≤ ≤ 20 mm.

[0006] In the present invention, the stainless steel pipe includes a pipe body, and the pipe body thickness is 0.8 mm ≤ ≤ 5 mm. When the pipe body thickness is 0.8 mm ≤ ≤ 5 mm, the stainless steel pipe will not deform when installed on a building floor using one or more of concrete, cement, and adhesives. This design ensures that the stainless steel pipe has sufficient deformation resistance while reducing the cost and weight of the stainless steel pipe.

[0007] In addition, when the thickness of the pipe body is 0.8 mm or less and 5 mm or less, the stainless steel pipe will not resonate under the excitation of the flue gas during the flue gas discharge process.

[0008] In the present invention, the stainless steel pipe further includes a reinforcing rib unit, which is provided on the outer wall and / or inner wall of the pipe body. The thickness of the reinforcing rib unit is 0.8 mm ≤ ≤ 20 mm. When the thickness of the reinforcing rib unit is 0.8 mm ≤ ≤ 20 mm, the vibration amplitude of the stainless steel pipe during the exhaust process is weakened. By weakening the vibration amplitude of the stainless steel pipe during the exhaust process, the user in the house can avoid hearing the sound of the stainless steel pipe during the exhaust process. This design improves the user's living experience in the house by eliminating abnormal sounds and noises during the exhaust process of the stainless steel pipe.

[0009] After testing, when the thickness of the reinforcement unit is 0.8mm≤≤20mm, and the stainless steel pipe is emitting smoke (during the test, when the stainless steel pipe is emitting smoke: the average exhaust volume of the positive pressure system is 400 cubic meters / hour, and the average exhaust volume of the negative pressure system is 700 cubic meters / hour), a one-yuan metal coin can stand on the outer wall of the stainless steel pipe placed on its side, and the water in the cup will only shake slightly when placed on the outer wall of the stainless steel pipe placed on its side.

[0010] Since the stainless steel pipe is installed on the floor of the building through one or more of concrete, cement, and adhesives, the reinforcement unit is also used to change the contact surface between the stainless steel pipe and the floor to further increase the difficulty of the stainless steel pipe moving horizontally relative to the floor.

[0011] Preferably, the reinforcing rib unit includes at least one vertical rib, arranged along the height of the pipe body, with the height dimension of the vertical rib being ≥ half the height dimension of the pipe body; or, the reinforcing rib unit includes at least one transverse rib, arranged horizontally along the pipe body, with the width dimension of the transverse rib being ≥ half the width dimension of the pipe body; or, the reinforcing rib unit includes at least one diagonal rib, arranged obliquely along the height of the pipe body, with the projection of the diagonal rib on a vertical plane being ≥ half the height dimension of the pipe body. This design, by providing reinforcing ribs in a single direction, reduces the manufacturing difficulty and cost of the stainless steel pipe, shortening the manufacturing time required for the stainless steel pipe.

[0012] Preferably, the reinforcing rib unit includes two or three of at least one vertical rib, at least one transverse rib, and at least one diagonal rib. The vertical rib is arranged along the height of the pipe body, with its height being ≥ half the height of the pipe body. The transverse rib is arranged horizontally along the pipe body, with its width being ≥ half the width of the pipe body. The diagonal rib is arranged obliquely along the height of the pipe body, with its projection on a vertical plane being ≥ half the height of the pipe body. This design, by providing reinforcing ribs in two or three directions, reduces the number of reinforcing ribs required for the stainless steel pipe.

[0013] Preferably, two or three of at least one vertical rib, at least one horizontal rib and at least one oblique rib intersect with each other. When two or three of at least one vertical rib, at least one horizontal rib and at least one oblique rib intersect with each other, the vibration amplitude of the stainless steel pipe during the exhaust process will be further weakened; or, two or three of at least one vertical rib, at least one horizontal rib and at least one oblique rib are staggered. When two or three of at least one vertical rib, at least one horizontal rib and at least one oblique rib are staggered, the probability of smoke leakage in the stainless steel pipe will be reduced.

[0014] Preferably, the side wall of the pipe body is provided with an exhaust hole for connecting to the exhaust valve, and the outer side wall of the pipe body is provided with a flange on the peripheral side of the exhaust hole, and the flange provides an installation position for the exhaust valve, and the flange includes an annular sealing plate for fitting and sealing the exhaust valve, and the annular sealing plate is used to eliminate the installation gap between the exhaust valve and the stainless steel pipe.

[0015] A method for forming a stainless steel pipe as described in any of the above technical solutions comprises the following forming steps:

[0016] Step 1: forming the reinforcing rib unit from a stainless steel plate by stamping;

[0017] Step 2: bend the stainless steel plate twice or more;

[0018] Step three: splice the stainless steel plates in step two end to end to form the pipeline body.

[0019] Preferably, the vertical bearing capacity of the pipeline body in step three is ≥90KN.

[0020] Preferably, the pipeline body is formed by welding a stainless steel plate that is bent twice or more.

[0021] Preferably, the mounting portion is formed by flanging a stainless steel plate; or, the mounting portion is formed by flanging an end portion of the pipe body.

[0022] The residential stainless steel flue comprises at least two sections of exhaust pipes, each section of the exhaust pipe comprises a stainless steel pipe, and the stainless steel pipe is the stainless steel pipe described in any one of the above technical solutions.

[0023] Preferably, the residential stainless steel flue further includes an exhaust valve, and the stainless steel pipe is integrally connected to the exhaust pipe by a clamping mechanism. This design facilitates assembly and disassembly of the exhaust valve, and does not damage the valve itself or the stainless steel pipe during assembly and disassembly. This allows for multiple uses of the exhaust valve.

[0024] Preferably, the exhaust pipe further comprises a non-metallic pipe externally sheathed over the stainless steel pipe. Adjacent stainless steel pipes and / or adjacent non-metallic pipes are directly connected to form a single unit; alternatively, adjacent stainless steel pipes and / or adjacent non-metallic pipes are indirectly connected to form a single unit. With this design, the non-metallic pipe is sheathed over the stainless steel pipe, eliminating the need for surface finishing. Furthermore, the sheathing of the non-metallic pipe over the stainless steel pipe provides thermal insulation and impact protection.

[0025] Preferably, the outer wall of at least one section of the smoke exhaust pipe is provided with a support bracket for abutting the floor and for bearing the weight of the residential stainless steel flue, and the support bracket is used to reduce the weight of the exhaust pipe that needs to be borne at the connection between adjacent exhaust pipes, so as to reduce the probability of deformation of the smoke exhaust pipe; the bottom end of the smoke exhaust pipe located at the bottom is provided with a bottom bracket, which provides support for the residential stainless steel flue and improves the deformation resistance of the residential stainless steel flue, and the bottom bracket is provided with a hoisting part. When the bottom bracket is provided with a hoisting part, the residential stainless steel flue can be hoisted from top to bottom to the bottom of the building. Since the length of the smoke exhaust pipe is usually the same as the height of the floor, that is, the connection of the smoke exhaust pipe corresponds to the floor, after the adjacent smoke exhaust pipes are fixedly connected at the topmost floor of the building, the smoke exhaust pipe is hoisted to the bottom of the building by a crane. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A three-dimensional diagram of a stainless steel pipeline in a preferred embodiment of the present invention;

[0027] Figure 2 This is a main view of a stainless steel pipe in a preferred embodiment of the present invention (a broken view after enlarging the length direction of the stainless steel pipe);

[0028] Figure 3 A top view of a stainless steel pipeline in a preferred embodiment of the present invention;

[0029] Figure 4 for Figure 3Cross-sectional view at AA (enlarged broken view along the length of the stainless steel pipe). DETAILED DESCRIPTION

[0030] The following is an explanation and description of the technical solutions of the embodiments of the present invention in conjunction with the drawings of the embodiments of the present invention. However, the following embodiments are only preferred embodiments of the present invention and are not exhaustive. Based on the embodiments in the implementation manner, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the present invention.

[0031] See also Figure 1 、 Figure 3 and Figure 4 A stainless steel pipe, installed in a building and used to discharge flue gas, includes a pipe body 1 and a reinforcing rib unit 2. The pipe body 1 has a flue gas flow channel 10, and mounting portions 13 are provided at both ends of the pipe body 1. The pipe body 1 has a thickness W1, 0.8 mm ≤ W1 ≤ 5 mm. The reinforcing rib unit 2 is formed by an outward protrusion of the side wall of the pipe body 1, and the thickness of the reinforcing rib unit 2 is W2, 0.8 mm ≤ W2 ≤ 20 mm. In other embodiments of the present invention, the reinforcing rib unit is formed by an inward depression of the side wall of the pipe body; or, the reinforcing rib unit is formed by an outward protrusion of the side wall of the pipe body, or the reinforcing rib unit is formed by an inward depression of the side wall of the pipe body.

[0032] In this embodiment, the rib unit 2 is formed by the convexity of the pipe body 1. When the rib unit 2 is formed by the convexity of the pipe body 1, the vertical bearing capacity of the pipe body 1 is ≥ 90 kN. In other embodiments of the present invention, the rib unit is formed by the concaveness of the pipe body. When the rib unit is formed by the concaveness of the pipe body, the vertical bearing capacity of the pipe body is ≥ 90 kN. The rib unit is formed by the convexity of the pipe body, and the rib unit is formed by the concaveness of the pipe body. When the rib unit is formed by the convexity of the pipe body, and the rib unit is formed by the concaveness of the pipe body, the vertical bearing capacity of the pipe body is ≥ 90 kN.

[0033] The vertical bearing capacity of existing pipe bodies is approximately 50 kN, while the national standard JG194-2018 stipulates that exhaust pipes (herein, stainless steel pipes) must have a vertical bearing capacity of no less than 90 kN. This requirement is intended to prevent tilting of residential stainless steel flues during and after installation. Therefore, the present invention incorporates a reinforcing rib unit 2, ensuring that 0.8 mm ≤ W2 ≤ 20 mm, to ensure that the stainless steel pipes meet national standards.

[0034] In the present invention, the height range of the stainless steel pipe is 2.7 meters to 3.6 meters. After testing by Zhejiang Provincial Construction Engineering Quality Inspection Station Co., Ltd. (Test Report No.: JG2019-090-2), when 0.8mm≤W1≤5mm, 0.8mm≤W2≤20mm, and the height range of the stainless steel pipe is 2.7 meters to 3.6 meters, the vertical bearing capacity of the three sample stainless steel pipes is 181kN, 238kN, and 136kN. This design further ensures that the vertical bearing capacity of the stainless steel pipes in the present invention is greater than 90kN.

[0035] Preferably, the reinforcing rib unit 2 in this embodiment is a convex rib formed by outwardly stamping the pipe body. In other embodiments of the present invention, the reinforcing rib unit is a convex rib welded to the outer wall of the pipe body; or, the reinforcing rib unit is a convex rib glued to the inner wall of the pipe body; or, the reinforcing rib unit is a convex rib riveted to the outer wall of the pipe body; or, the reinforcing rib unit is a convex rib attached to the outer wall and the inner wall of the pipe body via fasteners.

[0036] join Figure 1 and Figure 2 , the reinforcing rib unit 2 includes at least one vertical rib 21 and at least one transverse rib 22. The vertical rib 21 is arranged along the height direction of the pipe body 1, and the height dimension of the vertical rib 21 is H, H ≥ half of the height dimension of the pipe body 1. The transverse rib 22 is arranged along the horizontal direction of the pipe body 1, and the width dimension of the transverse rib 22 is L, L ≥ half of the width dimension of the pipe body 1. In other embodiments of the present invention, the reinforcing rib unit includes at least one vertical rib, at least one transverse rib and at least one oblique rib. The vertical rib is arranged along the height direction of the pipe body, and the height dimension of the vertical rib is H, H ≥ half of the height dimension of the pipe body. The transverse rib is arranged along the horizontal direction of the pipe body, and the width dimension of the transverse rib is L, L ≥ half of the width dimension of the pipe body. The oblique rib is arranged obliquely along the height direction of the pipe body, and the projection of the oblique rib on the vertical plane ≥ half of the height dimension of the pipe body; or, the reinforcing rib unit includes at least one vertical rib and at least one oblique rib, The vertical ribs are arranged along the height direction of the pipe body, and the height dimension of the vertical ribs is H, H ≥ half of the height dimension of the pipe body. The oblique ribs are arranged obliquely along the height direction of the pipe body, and the projection of the oblique ribs on the vertical plane ≥ half of the height dimension of the pipe body; or, the reinforcing rib unit includes at least one transverse rib and at least one oblique rib, the transverse ribs are arranged along the horizontal direction of the pipe body, and the width dimension of the transverse ribs is L, L ≥ half of the width dimension of the pipe body, and the oblique ribs are arranged obliquely along the height direction of the pipe body, and the projection of the oblique ribs on the vertical plane ≥ half of the height dimension of the pipe body.

[0037] It should be noted that: Figure 2As shown, the dimension of the pipe body 1 in the direction of the height dimension of the vertical rib 21 is the height dimension of the pipe body 1, and the dimension of the pipe body 1 in the direction of the width dimension of the transverse rib 22 is the width dimension of the pipe body 1. When the cross-section of the pipe body 1 in the horizontal direction is a square, the width dimension value of the pipe body 1 is only one; when the cross-section of the pipe body 1 in the horizontal direction is a rectangle, the width dimension value of the pipe body 1 is two, and L is ≥ half of the width dimension of the pipe body (the smaller of the two width values ​​of the pipe body).

[0038] like Figure 1 As shown, in this embodiment, a vertical rib 21 is continuous in its height direction. In other embodiments of the present invention, a vertical rib may be arranged at intervals in its height direction, that is, a vertical rib includes multiple sections, and there are gaps between adjacent sections.

[0039] In the present invention, the structure of each transverse reinforcement and each oblique reinforcement may refer to the structure of each vertical reinforcement.

[0040] In this embodiment, the distance between the vertical rib 21 and the mounting portion 13 is ≤50 cm. This design avoids insufficient anti-deformation capability of the pipe body 1 at its end.

[0041] Since 0.8mm≤W2≤20mm, to prevent fracture at the transition between the reinforcing rib 21 and the pipe body 1, in the present invention, the width of the vertical rib 21 is ≥5mm, the width of the horizontal rib 22 is ≥5mm, and the width of the diagonal rib is ≥5mm. This design prevents smoke leakage in stainless steel pipes.

[0042] like Figure 1 As shown, preferably, at least one vertical rib 21 and at least one horizontal rib 22 intersect with each other. The "at least one vertical rib 21 and at least one horizontal rib 22 intersecting with each other" needs to be formed by die stamping stainless steel plates. Rolling technology cannot achieve the at least one vertical rib 21 and at least one horizontal rib intersecting with each other. In other embodiments of the present invention, at least one vertical rib and at least one diagonal rib intersect with each other; or at least one transverse rib and at least one diagonal rib intersect with each other; or at least one vertical rib, at least one transverse rib, and at least one diagonal rib intersect with each other; or two or three of at least one vertical rib, at least one transverse rib, and at least one diagonal rib are staggered.

[0043] In this embodiment, the side wall of the pipe body 1 is provided with an exhaust hole for connecting to the exhaust valve, and the outer side wall 11 of the pipe body 1 is provided with a flange on the surrounding side of the exhaust hole. The flange provides an installation position for the exhaust valve. The flange includes an annular sealing plate for fitting and sealing the exhaust valve. The annular sealing plate is used to eliminate the installation gap between the exhaust valve and the stainless steel pipe.

[0044] The flange described in this embodiment includes a connecting pipe and an annular sealing plate. One end of the connecting pipe is disposed on the outer wall 11 of the pipe body 1, around the exhaust hole, and the annular sealing plate is disposed on the other end of the connecting pipe. In other embodiments of the present invention, the flange includes an annular fixing plate, a connecting pipe, and an annular sealing plate. The annular fixing plate is disposed on the outer wall of the pipe body, around the exhaust hole, and the annular fixing plate is also disposed on one end of the connecting pipe, and the annular sealing plate is disposed on the other end of the connecting pipe.

[0045] See also Figure 1 , mounting parts 13 are provided at both ends of the pipe body 1, and the mounting parts 13 are annular mounting plates in this embodiment. The connection methods of adjacent stainless steel pipes include but are not limited to: the annular mounting plates of adjacent stainless steel pipes are connected as a whole by welding, the annular mounting plates of adjacent stainless steel pipes are connected as a whole by riveting, the annular mounting plates of adjacent stainless steel pipes are connected as a whole by screws, the annular mounting plates of adjacent stainless steel pipes are connected as a whole by gluing, the annular mounting plates of adjacent stainless steel pipes are connected as a whole by screwing, and the annular mounting plates of adjacent stainless steel pipes are connected as a whole by annular clamps.

[0046] In addition, in other embodiments of the present invention, the mounting portion can be an annular mounting groove. When the mounting portion is an annular mounting groove, the flue gas flow duct is preferably an "I"-shaped structure; or, the mounting portion can also be several discontinuous mounting plates, and several mounting plates of adjacent stainless steel pipes can be spliced ​​into an annular plate and connected as one.

[0047] A method for forming a stainless steel pipe as described in this embodiment includes the following forming steps:

[0048] Step 1: The stainless steel plate is formed into a reinforcing rib unit 2 by stamping;

[0049] Step 2: bend the stainless steel plate twice or more;

[0050] Step 3: Splice the stainless steel plates from step 2 end to end to form the pipe body 1.

[0051] Because stamping and bending equipment are both universal, common, and standardized, the pipe body 1 can be formed in both steps 1 and 2 of the stainless steel pipe using existing production facilities. This design allows for precise control of the dimensions of the pipe body 1, the position of the rib units 2, and the dimensions of the rib units 2. Preferably, the vertical bearing capacity of the pipe body 1 in step 3 is ≥ 90 kN.

[0052] In this embodiment, the stainless steel plate is stamped using a die to form the reinforcing rib units 2. By reducing the wall thickness of the stainless steel pipe at the reinforcing rib units 2, the weight of the stainless steel pipe is reduced. This design reduces the weight of the stainless steel pipe and reduces the vertical load required of the stainless steel pipe. In other embodiments of the present invention, the stainless steel plate is stamped using a punch to form the reinforcing rib units.

[0053] In the present invention, a stainless steel plate that is bent twice or more is welded to form a pipe body 1. Specifically, in this embodiment, the stainless steel plate is bent three times so that the stainless steel plate forms a pipe body 1 with a quadrilateral cross-section after welding. The pipe body 1 formed by welding can leave traces of the connection between the end and end of the stainless steel plate. In addition, the center of gravity of the pipe body 1 formed by welding will not be offset. In other embodiments of the present invention, a stainless steel plate that is bent twice or more can be welded to form a pipe body with a triangular cross-ribbed area; or a stainless steel plate that is bent twice or more can be welded to form a pipe body with a pentagonal cross-ribbed area; or a stainless steel plate that is bent twice or more can be welded to form an octagonal cross-ribbed area; or a stainless steel plate that is bent twice or more can be welded to form a pipe body with a circular cross-ribbed area; or a stainless steel plate that is bent twice or more can be welded to form a pipe body with an elliptical cross-ribbed area.

[0054] In addition, in other embodiments of the present invention, the stainless steel plates bent twice or more are connected to form the pipe body by means other than welding, for example: the stainless steel plates bent twice or more are connected to form the pipe body by gluing, the stainless steel plates bent twice or more are connected to form the pipe body by fasteners, the stainless steel plates bent twice or more are connected to form the pipe body by riveting, etc.

[0055] In this embodiment, the stainless steel plate may be flanged to form the mounting portion 13 in step one or step two; or, the end of the pipe body 1 may be flanged to form the mounting portion 13 in step three.

[0056] The residential stainless steel flue comprises at least two sections of exhaust pipes, each section of the exhaust pipe comprises a stainless steel pipe, and the stainless steel pipe is the stainless steel pipe described in this embodiment.

[0057] In this embodiment, the residential stainless steel flue also includes an exhaust valve, and the stainless steel pipe and the exhaust pipe are connected as one in a clamping manner. Specifically: a clamping plate is provided on the exhaust valve, and the annular sealing plate is clamped between the clamping plate and the exhaust valve; or, the residential stainless steel flue also includes a clamping mechanism, the annular sealing plate and the exhaust valve are abutted against each other and are clamped by the clamping mechanism at the same time; or, a clamping plate is provided on the stainless steel pipe, and the exhaust valve is clamped between the clamping plate and the annular sealing plate.

[0058] In this embodiment, the smoke exhaust pipe also includes a non-metallic pipe outside the stainless steel pipe. Adjacent stainless steel pipes and / or adjacent non-metallic pipes are directly connected to form an integral whole; or, adjacent stainless steel pipes and / or adjacent non-metallic pipes are indirectly connected to form an integral whole.

[0059] "Direct connection of adjacent stainless steel pipes and / or adjacent non-metallic pipes" includes, but is not limited to, the following: snap connection of adjacent stainless steel pipes, threaded connection of adjacent non-metallic pipes, plugging of adjacent stainless steel pipes into each other, and plugging of adjacent non-metallic pipes into each other. "Indirect connection of adjacent stainless steel pipes and / or adjacent non-metallic pipes" includes, but is not limited to, welding of adjacent stainless steel pipes with fusible solder, gluing of adjacent non-metallic pipes with glue, rivet connection of adjacent stainless steel pipes with glue, screw connection of adjacent stainless steel pipes with screws, welding of adjacent non-metallic pipes with fusible solder, and clamping of adjacent non-metallic pipes.

[0060] A support bracket is provided on the outer side wall of at least one section of the smoke exhaust pipe for abutting the floor and bearing the weight of the residential stainless steel flue. When the smoke exhaust pipe includes a stainless steel pipe, one end of the support bracket is fixedly connected to the stainless steel pipe by one or more methods such as welding, screwing, riveting, and gluing, and the other end of the support bracket is fixedly connected to the floor slab of the floor by one or more methods such as welding, screwing, riveting, and riveting; when the smoke exhaust pipe includes a stainless steel pipe and a non-metallic pipe, one end of the support bracket is fixedly connected to the non-metallic pipe by one or more methods such as welding, screwing, riveting, and gluing, and the other end of the support bracket is fixedly connected to the floor slab of the floor by one or more methods such as welding, screwing, gluing, and riveting.

[0061] A bottom bracket is provided at the bottom end of the smoke exhaust pipe at the bottom, and a hoisting part is provided on the bottom bracket. The hoisting part can be one or more of a lifting ring, a lifting hook, a lifting hole, and a lifting rod. The crane lifts the smoke exhaust pipe from the top of the building and lowers it to the bottom of the building through the lifting part.

[0062] Example 2

[0063] A stainless steel pipe, installed in a building and used for exhausting flue gas, comprises a pipe body and a reinforcement unit. The pipe body has a flue gas flow path and mounting portions at both ends. The pipe body has a thickness W1, 0.8 mm ≤ W1 ≤ 5 mm. The reinforcement unit is formed by outward projections from the sidewalls of the pipe body, and has a thickness W2, 0.8 mm ≤ W2 ≤ 20 mm. In other embodiments of the present invention, the reinforcement unit is formed by inward depressions from the sidewalls of the pipe body; alternatively, the reinforcement unit is formed by outward projections from the sidewalls of the pipe body, or the reinforcement unit is formed by inward depressions from the sidewalls of the pipe body.

[0064] In this embodiment, the rib unit is formed by a convex shape of the pipe body. When the rib unit is formed by a convex shape of the pipe body, the vertical bearing capacity of the pipe body is ≥ 90 kN. In other embodiments of the present invention, the rib unit is formed by a concave shape of the pipe body. When the rib unit is formed by a concave shape of the pipe body, the vertical bearing capacity of the pipe body is ≥ 90 kN. The rib unit is formed by a convex shape of the pipe body, and the rib unit is formed by a concave shape of the pipe body. When the rib unit is formed by a convex shape of the pipe body, and the rib unit is formed by a concave shape of the pipe body, the vertical bearing capacity of the pipe body is ≥ 90 kN.

[0065] The vertical bearing capacity of existing pipe bodies is approximately 50 kN, while the national standard JG194-2018 stipulates that exhaust pipes (herein, stainless steel pipes) must have a vertical bearing capacity of no less than 90 kN. This requirement is intended to prevent tilting of residential stainless steel flues during and after installation. Therefore, the present invention incorporates reinforcing ribs, ensuring that the stainless steel pipes meet national standards with a width of 0.8 mm ≤ W2 ≤ 20 mm.

[0066] In the present invention, the height range of the stainless steel pipe is 2.7 meters to 3.6 meters. After testing by Zhejiang Provincial Construction Engineering Quality Inspection Station Co., Ltd. (Test Report No.: JG2019-090-2), when 0.8mm≤W1≤5mm, 0.8mm≤W2≤20mm, and the height range of the stainless steel pipe is 2.7 meters to 3.6 meters, the vertical bearing capacity of the three sample stainless steel pipes is 181kN, 238kN, and 136kN. This design ensures that the vertical bearing capacity of the stainless steel pipes in the present invention is greater than 90kN.

[0067] Preferably, the reinforcing rib unit in this embodiment is a convex rib formed by outwardly stamping the pipe body. In other embodiments of the present invention, the reinforcing rib unit is a convex rib welded to the outer wall of the pipe body; or, the reinforcing rib unit is a convex rib glued to the inner wall of the pipe body; or, the reinforcing rib unit is a convex rib riveted to the outer wall of the pipe body; or, the reinforcing rib unit is a convex rib attached to the outer wall and the inner wall of the pipe body via fasteners.

[0068] The difference from Example 1 is that: in this embodiment, the reinforcing rib unit includes at least one vertical rib, the vertical rib is arranged along the height direction of the pipe body, and the height dimension of the vertical rib is ≥ half of the height dimension of the pipe body; or, the reinforcing rib unit includes at least one transverse rib, the transverse rib is arranged along the horizontal direction of the pipe body, and the width dimension of the transverse rib is ≥ half of the width dimension of the pipe body; or, the reinforcing rib unit includes at least one oblique rib, the oblique rib is arranged obliquely along the height direction of the pipe body, and the projection of the oblique rib on the vertical plane is ≥ half of the height dimension of the pipe body.

[0069] It should be noted that the dimension of the pipe body in the direction of the vertical rib height dimension is the height dimension of the pipe body, and the dimension of the pipe body in the direction of the horizontal rib width dimension is the width dimension of the pipe body. When the cross-section of the pipe body in the horizontal direction is a square, the width dimension value of the pipe body is only one; when the cross-section of the pipe body in the horizontal direction is a rectangle, the width dimension value of the pipe body is two, and L ≥ half of the width dimension of the pipe body (the smaller of the two width values ​​of the pipe body).

[0070] In this embodiment, a vertical rib is continuous in its height direction. In other embodiments of the present invention, a vertical rib may be arranged at intervals in its height direction, that is, a vertical rib includes multiple sections, and there are gaps between adjacent sections.

[0071] In the present invention, the structure of each transverse reinforcement and each oblique reinforcement may refer to the structure of each vertical reinforcement.

[0072] In this embodiment, the distance between the vertical ribs and the mounting portion is ≤50 cm. This design avoids insufficient deformation resistance of the pipe body at its end.

[0073] Since 0.8mm≤W2≤20mm, to prevent fractures at the transition between the reinforcing ribs and the pipe body, the present invention specifies that the width of the vertical ribs should be ≥5mm, the width of the horizontal ribs should be ≥5mm, and the width of the diagonal ribs should be ≥5mm. This design prevents smoke leaks in stainless steel pipes.

[0074] In this embodiment, the side wall of the pipe body is provided with an exhaust hole for connecting to the exhaust valve, and the outer wall of the pipe body is provided with a flange on the surrounding side of the exhaust hole. The flange provides an installation position for the exhaust valve. The flange includes an annular sealing plate for fitting and sealing the exhaust valve. The annular sealing plate is used to eliminate the installation gap between the exhaust valve and the stainless steel pipe.

[0075] The flange described in this embodiment includes a connecting pipe and an annular sealing plate. One end of the connecting pipe is disposed on the outer wall of the pipe body, surrounding the exhaust hole, and the annular sealing plate is disposed on the other end of the connecting pipe. In other embodiments of the present invention, the flange includes an annular fixing plate, a connecting pipe, and an annular sealing plate. The annular fixing plate is disposed on the outer wall of the pipe body, surrounding the exhaust hole, and the annular fixing plate is also disposed on one end of the connecting pipe, and the annular sealing plate is disposed on the other end of the connecting pipe.

[0076] In this embodiment, mounting parts are provided at both ends of the pipe body, which are annular mounting plates in this embodiment. The connection methods of adjacent stainless steel pipes include but are not limited to: the annular mounting plates of adjacent stainless steel pipes are connected as one by welding, the annular mounting plates of adjacent stainless steel pipes are connected as one by riveting, the annular mounting plates of adjacent stainless steel pipes are connected as one by screws, the annular mounting plates of adjacent stainless steel pipes are connected as one by gluing, the annular mounting plates of adjacent stainless steel pipes are connected as one by screwing, and the annular mounting plates of adjacent stainless steel pipes are connected as one by annular clamps.

[0077] In addition, in other embodiments of the present invention, the mounting portion can be an annular mounting groove. When the mounting portion is an annular mounting groove, the flue gas flow duct is preferably an "I"-shaped structure; or, the mounting portion can also be several discontinuous mounting plates, and several mounting plates of adjacent stainless steel pipes can be spliced ​​into an annular plate and connected as one.

[0078] A method for forming a stainless steel pipe as described in this embodiment includes the following forming steps:

[0079] Step 1: forming a rib unit from a stainless steel plate by stamping;

[0080] Step 2: bend the stainless steel plate twice or more;

[0081] Step 3: Splice the stainless steel plates from step 2 end to end to form the pipe body.

[0082] Because stamping and bending equipment are both universal, common, and standardized, the pipe body can be formed in both steps 1 and 2 of the stainless steel pipe forming process using existing production facilities. This design allows for precise control of the pipe body's dimensions, rib unit locations, and rib unit dimensions. Preferably, the pipe body's vertical bearing capacity in step 3 is ≥ 90 kN.

[0083] In this embodiment, the stainless steel plate is stamped using a die to form the rib units. By reducing the wall thickness of the stainless steel pipe at the rib units, the weight of the stainless steel pipe is reduced. This design reduces the vertical load required of the stainless steel pipe by reducing its weight. In other embodiments of the present invention, the rib units are stamped using a punch.

[0084] In the present invention, a stainless steel plate that is bent twice or more is welded to form a pipe body. Specifically, in this embodiment, the stainless steel plate is bent three times so that the stainless steel plate forms a pipe body with a quadrilateral cross-section after welding. The pipe body formed by welding can leave traces of the connection between the end and end of the stainless steel plate. In addition, the center of gravity of the pipe body formed by welding will not shift. In other embodiments of the present invention, a stainless steel plate that is bent twice or more can be welded to form a pipe body with a triangular cross-ribbed area; or a stainless steel plate that is bent twice or more can be welded to form a pipe body with a pentagonal cross-ribbed area; or a stainless steel plate that is bent twice or more can be welded to form an octagonal cross-ribbed area; or a stainless steel plate that is bent twice or more can be welded to form a pipe body with a circular cross-ribbed area; or a stainless steel plate that is bent twice or more can be welded to form a pipe body with an elliptical cross-ribbed area.

[0085] In addition, in other embodiments of the present invention, the stainless steel plates bent twice or more are connected to form the pipe body by means other than welding, for example: the stainless steel plates bent twice or more are connected to form the pipe body by gluing, the stainless steel plates bent twice or more are connected to form the pipe body by fasteners, the stainless steel plates bent twice or more are connected to form the pipe body by riveting, etc.

[0086] In this embodiment, the stainless steel plate may be flanged to form the mounting portion in step one or step two; or, the end of the pipe body may be flanged to form the mounting portion in step three.

[0087] The residential stainless steel flue comprises at least two sections of exhaust pipes, each section of the exhaust pipe comprises a stainless steel pipe, and the stainless steel pipe is the stainless steel pipe described in this embodiment.

[0088] In this embodiment, the residential stainless steel flue also includes an exhaust valve, and the stainless steel pipe and the exhaust pipe are connected as one in a clamping manner. Specifically: a clamping plate is provided on the exhaust valve, and the annular sealing plate is clamped between the clamping plate and the exhaust valve; or, the residential stainless steel flue also includes a clamping mechanism, the annular sealing plate and the exhaust valve are abutted against each other and are clamped by the clamping mechanism at the same time; or, a clamping plate is provided on the stainless steel pipe, and the exhaust valve is clamped between the clamping plate and the annular sealing plate.

[0089] In this embodiment, the smoke exhaust pipe also includes a non-metallic pipe outside the stainless steel pipe. Adjacent stainless steel pipes and / or adjacent non-metallic pipes are directly connected to form an integral whole; or, adjacent stainless steel pipes and / or adjacent non-metallic pipes are indirectly connected to form an integral whole.

[0090] "Direct connection of adjacent stainless steel pipes and / or adjacent non-metallic pipes" includes, but is not limited to, the following: snap connection of adjacent stainless steel pipes, threaded connection of adjacent non-metallic pipes, plugging of adjacent stainless steel pipes into each other, and plugging of adjacent non-metallic pipes into each other. "Indirect connection of adjacent stainless steel pipes and / or adjacent non-metallic pipes" includes, but is not limited to, welding of adjacent stainless steel pipes with fusible solder, gluing of adjacent non-metallic pipes with glue, rivet connection of adjacent stainless steel pipes with glue, screw connection of adjacent stainless steel pipes with screws, welding of adjacent non-metallic pipes with fusible solder, and clamping of adjacent non-metallic pipes.

[0091] A support bracket is provided on the outer side wall of at least one section of the smoke exhaust pipe for abutting the floor and bearing the weight of the residential stainless steel flue. When the smoke exhaust pipe includes a stainless steel pipe, one end of the support bracket is fixedly connected to the stainless steel pipe by one or more methods such as welding, screwing, riveting, and gluing, and the other end of the support bracket is fixedly connected to the floor slab of the floor by one or more methods such as welding, screwing, riveting, and riveting; when the smoke exhaust pipe includes a stainless steel pipe and a non-metallic pipe, one end of the support bracket is fixedly connected to the non-metallic pipe by one or more methods such as welding, screwing, riveting, and gluing, and the other end of the support bracket is fixedly connected to the floor slab of the floor by one or more methods such as welding, screwing, gluing, and riveting.

[0092] A bottom bracket is provided at the bottom end of the smoke exhaust pipe at the bottom, and a hoisting part is provided on the bottom bracket. The hoisting part can be one or more of a lifting ring, a lifting hook, a lifting hole, and a lifting rod. The crane lifts the smoke exhaust pipe from the top of the building and lowers it to the bottom of the building through the lifting part.

[0093] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Those skilled in the art will understand that the present invention includes, but is not limited to, the contents described in the drawings and the above specific embodiments. Any modifications that do not deviate from the functional and structural principles of the present invention are intended to be included within the scope of the claims.

Claims

1. Stainless steel pipes, installed in buildings and used to discharge smoke, characterized in that: The pipe body comprises a pipe body and a reinforcing rib unit, wherein the pipe body has a flue gas flow channel, and mounting portions are provided at both ends of the pipe body. The reinforcing rib unit is formed by outward protrusions of the sidewall of the pipe body and / or inward depressions of the sidewall of the pipe body. The thickness of the pipe body is 0.8 mm ≤ ≤ 5 mm, and the thickness of the reinforcing rib unit is 0.8 mm ≤ ≤ 20 mm. Among them, the height range of stainless steel pipes is 2.7 meters to 3.6 meters; The side wall of the pipe body is provided with an exhaust hole for connecting to the exhaust valve, and the outer wall of the pipe body is provided with a flange on the periphery of the exhaust hole. The flange includes a connecting pipe and an annular sealing plate. One end of the connecting pipe is provided on the outer wall of the pipe body on the periphery of the exhaust hole, and the annular sealing plate is provided at the other end of the connecting pipe. The annular sealing plate is used to fit and seal the exhaust valve.

2. The stainless steel pipe according to claim 1, characterized in that The reinforcing rib unit includes at least one vertical rib, which is arranged along the height direction of the pipe body, and the height dimension of the vertical rib is ≥ half of the height dimension of the pipe body; or, the reinforcing rib unit includes at least one transverse rib, which is arranged along the horizontal direction of the pipe body, and the width dimension of the transverse rib is ≥ half of the width dimension of the pipe body; or, the reinforcing rib unit includes at least one oblique rib, which is arranged obliquely along the height direction of the pipe body, and the projection of the oblique rib on the vertical plane is ≥ half of the height dimension of the pipe body.

3. The stainless steel pipe according to claim 1, characterized in that The reinforcing rib unit includes two or three of at least one vertical rib, at least one transverse rib and at least one oblique rib. The vertical rib is arranged along the height direction of the pipe body, and the height dimension of the vertical rib is ≥ half of the height dimension of the pipe body. The transverse rib is arranged along the horizontal direction of the pipe body, and the width dimension of the transverse rib is ≥ half of the width dimension of the pipe body. The oblique rib is arranged obliquely along the height direction of the pipe body, and the projection of the oblique rib on the vertical plane is ≥ half of the height dimension of the pipe body.

4. The stainless steel pipe according to claim 1, characterized in that The side wall of the pipe body is provided with an exhaust hole for communicating with the exhaust valve, and the outer side wall of the pipe body is provided with a flange on the peripheral side of the exhaust hole.

5. A method for forming a stainless steel pipe according to any one of claims 1 to 4, characterized in that The molding process includes the following steps: Step 1: forming the reinforcing rib unit from a stainless steel plate by stamping; Step 2: bend the stainless steel plate twice or more; Step three: splice the stainless steel plates in step two end to end to form the pipeline body.

6. The method for forming a stainless steel pipe according to claim 5, wherein: The vertical bearing capacity of the pipeline body in step three is ≥90KN.

7. The method for forming a stainless steel pipe according to claim 5, wherein: The stainless steel plate bent twice or more than twice is welded to form the pipeline body.

8. The method for forming a stainless steel pipe according to claim 5, wherein: The mounting portion is formed by flanging a stainless steel plate; or, the mounting portion is formed by flanging an end portion of a pipe body.

9. A residential stainless steel flue, comprising at least two exhaust pipe sections, each exhaust pipe section comprising a stainless steel pipe, characterized in that: The stainless steel pipe is the stainless steel pipe according to any one of claims 1 to 5.

10. The residential stainless steel flue according to claim 9, characterized in that: The residential stainless steel flue further comprises an exhaust valve, and the stainless steel pipeline is connected to the exhaust pipe in a clamping manner.

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