A connecting structure of different cross-section container shells

Abstract

The application discloses a connecting structure of different cross-section container barrels, which is used for connecting the end portions of a first barrel and a second barrel, the first barrel is a circular barrel or a rectangular barrel, the second barrel is a circular barrel, a rectangular barrel or a variable-diameter section, the transverse inner diameter of the end portion of the first barrel is different from the transverse inner diameter of the end portion of the second barrel by 2-4 times of the wall thickness delta, the longitudinal inner diameter of the end portion of the first barrel is different from the longitudinal inner diameter of the end portion of the second barrel by 2-4 times of the wall thickness delta, wherein the wall thickness delta is the wall thickness value of the thinner one of the first barrel and the second barrel, the connecting structure comprises an annular connecting plate, the annular connecting plate is a circular annular connecting plate or a frame-shaped connecting plate, one axial surface of the annular connecting plate is circumferentially welded with the end portion of the first barrel, and the other axial surface of the annular connecting plate is circumferentially welded with the end portion of the second barrel. The connecting structure is simple in structure, reliable, low in cost, small in influence on the height and length of equipment, short in processing and manufacturing period and short in construction period.

Description

Technical Field

[0001] This invention relates to a cylinder connection structure in the fields of petroleum refining and chemical, coal chemical and other equipment, and more specifically to a connection structure for container cylinders with different cross-sections. Background Technology

[0002] In the fields of petroleum refining and chemical, coal chemical and other equipment, the shell is a structure that is welded together from one or more cylindrical sections.

[0003] GB / T 150.1~150.4-2011 "Pressure Vessels" stipulates: ① The shell is a cylinder or a circular conical shell; ② The length of any single section shall not be less than 300mm; ③ The conical shell with a half-apex angle α≤60° is an axisymmetric conical shell without flanges or with flanges, an eccentric conical shell, or a variable diameter section. Therefore, pressure vessel shells with different cross-sections can be connected by circular conical shells (variable diameter sections) with a length L≥300mm.

[0004] NB / T 47003.1-2022 "Atmospheric Pressure Vessels - Part 1: Welded Steel Atmospheric Pressure Vessels" includes cylindrical and rectangular vessels. It can be seen that atmospheric pressure vessel bodies with different cross-sections can be connected by diameter-changing sections that change from round to round, round to square (rectangular), or square (rectangular) to round, or square (rectangular) to square (rectangular).

[0005] When cylinders are connected to each other or to a variable diameter section, and the cross-sectional dimensions of the two connected sections are different but not significantly different (e.g., the difference in inner diameter is 2 to 4 times the wall thickness δ, i.e., D...),... i1 -D i2 =2~4δ): ⑴ When using a variable diameter section for connection: ① When the length of the variable diameter section L≥300mm, and the equipment height and length remain unchanged, the variable diameter section causes the large end cylinder to lengthen and the small end cylinder to shorten, resulting in a waste of equipment space and cylinder material; ② When the length of the variable diameter section L<300mm, irregular torsional deformation will occur during the blanking and welding of the plates, which is detrimental to the welding of the cylinder section and the stress on the equipment operation. ⑵ When lap welding, the weld is subjected to shear stress and bending moment, and there are welding defects and weld corrosion effects, and the upper cylinder has a high risk of sliding downward. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a connection structure for container cylinders of different cross-sections that is simple in structure, reliable, low in cost, has little impact on the height and length of equipment, and has a short processing, manufacturing and construction cycle, in light of the current state of the technology.

[0007] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: a connection structure for container cylinders with different cross-sections, used for connecting the ends of a first cylinder and a second cylinder, wherein the first cylinder is a circular cylinder or a rectangular cylinder, and the second cylinder is a circular cylinder, a rectangular cylinder, or a variable diameter section, wherein the transverse inner diameter of the end of the first cylinder differs from the transverse inner diameter of the end of the second cylinder by a wall thickness δ of 2-4 times, and the longitudinal inner diameter of the end of the first cylinder differs from the longitudinal inner diameter of the end of the second cylinder by a wall thickness δ of 2-4 times, wherein the wall thickness δ is the wall thickness value of the thinner one of the first cylinder and the second cylinder, and the connection structure includes an annular connecting plate, wherein the annular connecting plate is a circular annular connecting plate or a frame-shaped connecting plate, one axial surface of the annular connecting plate is welded to the end of the first cylinder, and the other axial surface of the annular connecting plate is welded to the end of the second cylinder.

[0008] For situations where the cross-sectional dimensions of two cylinders are different but not significantly different, i.e., the difference between the transverse inner diameter of the end of the first cylinder and the transverse inner diameter of the end of the second cylinder is 2-4 times the wall thickness δ, and the difference between the longitudinal inner diameter of the end of the first cylinder and the longitudinal inner diameter of the end of the second cylinder is 2-4 times the wall thickness δ, the connection structure of this invention uses a circular ring connecting plate or a frame-shaped connecting plate as the ring connecting plate. The ring connecting plate realizes the ring welding connection between the first cylinder and the second cylinder. The structure is simple, reliable, and low in cost, with little impact on the height and length of the equipment, and a short processing, manufacturing, and construction cycle.

[0009] Preferably, the first cylinder is a circular cylinder, and the annular connecting plate is a circular annular connecting plate.

[0010] Preferably, the first cylindrical body is a rectangular cylindrical body, and the annular connecting plate is a frame-shaped connecting plate.

[0011] Preferably, the first and second cylinders with the smaller cross-sectional outer contour dimension are externally welded to the annular connecting plate via an outer bevel at the end, while the first and second cylinders with the larger cross-sectional outer contour dimension are internally welded to the annular connecting plate via an inner bevel at the end. This bevel welding method allows for better transfer of axial force across the cylinder wall.

[0012] As a further preferred embodiment, the outer wall of the first and second cylinders with smaller cross-sectional outer contour dimensions is welded to the annular connecting plate with a plurality of evenly distributed reinforcing ribs. The outer wall of the end of the first and second cylinders with larger cross-sectional outer contour dimensions is connected to the annular connecting plate by external ring welding. This not only strengthens the welding strength between the first and second cylinders and the annular connecting plate, but also reduces the welding deformation of the annular connecting plate.

[0013] In one specific embodiment, the transverse inner diameter, longitudinal inner diameter, transverse outer diameter, and longitudinal outer diameter of the annular connecting plate are respectively denoted as Li1, Li2, Lo1, and Lo2; the transverse inner diameter, longitudinal inner diameter, transverse outer diameter, and longitudinal outer diameter of the end of the first cylinder are respectively denoted as Li11, Li12, Lo11, and Lo12; and the transverse inner diameter, longitudinal inner diameter, transverse outer diameter, and longitudinal outer diameter of the end of the second cylinder are respectively denoted as Li21, Li22, Lo21, and Lo22. The width of the outer weld bead between the outer wall of the end with the larger outer contour dimension of the second cylinder and the annular connecting plate is denoted as K. The value of Li1 is calculated based on the negative deviation of the smaller of Li11 and Li21, the value of Li2 is calculated based on the negative deviation of the smaller of Li12 and Li22, the value of Lo1 is calculated based on the sum of the positive deviation of the larger of Lo11 and Lo21 and at least twice the value of K, and the value of Lo2 is calculated based on the sum of the positive deviation of the larger of Lo12 and Lo22 and at least twice the value of K.

[0014] Preferably, the transverse inner diameter of the end of the first cylinder differs from the transverse inner diameter of the end of the second cylinder by a wall thickness δ of 2-3 times, and the longitudinal inner diameter of the end of the first cylinder differs from the longitudinal inner diameter of the end of the second cylinder by a wall thickness δ of 2-3 times.

[0015] As a further preferred embodiment, the transverse inner diameter of the end of the first cylinder differs from the transverse inner diameter of the end of the second cylinder by a wall thickness δ equal to twice the wall thickness δ, and the longitudinal inner diameter of the end of the first cylinder differs from the longitudinal inner diameter of the end of the second cylinder by a wall thickness δ equal to twice the wall thickness δ.

[0016] Compared with the prior art, the present invention has the following advantages: For the case where the cross-sectional dimensions of two cylinders are different but not significantly different, the connection structure of the container cylinders with different cross-sections of the present invention adopts a circular connecting plate or a frame connecting plate as the circular connecting plate, and realizes the ring welding connection between the first cylinder and the second cylinder through the circular connecting plate. The structure is simple, reliable, and low in cost, with little impact on the height and length of the equipment, and short processing, manufacturing and construction cycle. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a combined smoke and tower device using the connection structure of the present invention;

[0018] Figure 2 This is a schematic diagram of the single-sided connection of the circular-to-square-diameter section, the frame-shaped connecting plate, and the rectangular cylinder in Example 1;

[0019] Figure 3 For corresponding Figure 2 Structural dimension diagram;

[0020] Figure 4 This is a schematic diagram showing the structural dimensions of the frame-shaped connecting plate;

[0021] Figure 5 This is a schematic diagram of the single-sided connection of the circular-to-square-diameter section, the frame-shaped connecting plate, and the rectangular cylinder in Example 2. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0023] The connection structure of container cylinders with different cross-sections in Example 1 is applied to... Figure 1 The combined smoke and heat tower equipment shown is Figure 1 1 is the round-to-square diameter transition section, 3 is the rectangular cylinder, 5 is the square-to-round diameter transition section, 2 is the frame-shaped connecting plate used to connect the round-to-square diameter transition section and the rectangular cylinder, 4 is the frame-shaped connecting plate used to connect the rectangular cylinder and the square-to-round diameter transition section, 6 is the chimney, and 7 is the desulfurization tower. That is... Figure 1 The upper and lower ends of the rectangular cylinder 3 shown need to be connected to the square-to-round diameter section 5 and the round-to-square diameter section 1, respectively. Taking the connection between the lower end of the rectangular cylinder 3 (i.e., the first cylinder 3) and the upper end of the round-to-square diameter section 1 (i.e., the second cylinder 1) as an example, the connection structure of the container cylinders with different cross-sections of the present invention will be described in further detail.

[0024] In Example 1, the lower end of the first cylinder 3 has a transverse inner diameter that is twice the wall thickness δ of the upper end of the second cylinder 1, and the lower end of the first cylinder 3 has a longitudinal inner diameter that is twice the wall thickness δ of the upper end of the second cylinder 1. The wall thickness δ is the thinner wall thickness of the first cylinder 3 and the second cylinder 1; that is, the first cylinder 3 has the smaller cross-sectional outer contour dimension of the first cylinder 3 and the second cylinder 1, and the second cylinder 1 has the larger cross-sectional outer contour dimension of the first cylinder 3 and the second cylinder 1. Since the first cylinder 3 is a rectangular cylinder, a frame-shaped connecting plate 2 is used as an annular connecting plate to connect the first cylinder 3 and the second cylinder 1. One axial surface of the annular connecting plate is welded to the end of the first cylinder 3, and the other axial surface of the annular connecting plate is welded to the end of the second cylinder 1. Specifically, as shown... Figure 2 As shown, the first cylinder 3 has an outer bevel 31 at its end and is connected to the annular connecting plate by external ring welding. The second cylinder 1 has an inner bevel 11 at its end and is connected to the annular connecting plate by internal ring welding. Furthermore, multiple evenly distributed reinforcing ribs 8 are welded between the outer wall of the first cylinder 3 and the annular connecting plate. The outer wall of the end of the second cylinder 1 is connected to the annular connecting plate by external ring welding.

[0025] In Example 1, as Figure 3 and Figure 4As shown, the transverse inner diameter, longitudinal inner diameter, transverse outer diameter, and longitudinal outer diameter of the annular connecting plate are denoted as Li1, Li2, Lo1, and Lo2, respectively. The transverse inner diameter, longitudinal inner diameter, transverse outer diameter, and longitudinal outer diameter of the end of the first cylinder 3 are denoted as Li11, Li12, Lo11, and Lo12, respectively. The transverse inner diameter, longitudinal inner diameter, transverse outer diameter, and longitudinal outer diameter of the end of the second cylinder 1 are denoted as Li21, Li22, Lo21, and Lo22, respectively. The width of the outer weld bead between the outer wall of the end of body 1 and the annular connecting plate is denoted as K. It can be seen that: Li21 > Li11, Li22 > Li12, Lo21 > Lo11, Lo22 > Lo12. The value of Li1 is calculated based on the negative deviation of Li11, the value of Li2 is calculated based on the negative deviation of Li12, the value of Lo1 is calculated as the sum of the positive deviation of Lo21 and at least twice the value of K, and the value of Lo2 is calculated as the sum of the positive deviation of Lo22 and at least twice the value of K. Similarly, the connection between the rectangular cylinder 3 and the square-to-round diameter-changing section 5 is achieved through the frame-shaped connecting plate 4. A schematic diagram of the integrated chimney and tower equipment using the connection structure of this invention is shown below. Figure 1 .

[0026] The difference between the connection structure of the container cylinders with different cross-sections in Example 2 and Example 1 is that the transverse inner diameter of the lower end of the first cylinder 3 is twice the wall thickness δ of the transverse inner diameter of the upper end of the second cylinder 1, and the longitudinal inner diameter of the lower end of the first cylinder 3 is twice the wall thickness δ of the longitudinal inner diameter of the upper end of the second cylinder 1. The wall thickness δ is the wall thickness of the thinner cylinder between the first cylinder 3 and the second cylinder 1; that is, the first cylinder 3 has the larger cross-sectional outer contour dimension between the first cylinder 3 and the second cylinder 1, and the second cylinder 1 has the smaller cross-sectional outer contour dimension between the first cylinder 3 and the second cylinder 1. In Example 2, the value of Li1 is calculated based on the negative deviation of Li21, the value of Li2 is calculated based on the negative deviation of Li22, the value of Lo1 is calculated as the sum of the positive deviation of Lo11 and at least twice the K value, and the value of Lo2 is calculated as the sum of the positive deviation of Lo12 and at least twice the K value. Figure 5 As shown, the second cylinder 1 has an outer bevel 12 at its end and is connected to the annular connecting plate by external ring welding, and the first cylinder 3 has an inner bevel 32 at its end and is connected to the annular connecting plate by internal ring welding. Furthermore, multiple evenly distributed reinforcing ribs 9 are welded between the outer wall of the second cylinder 1 and the annular connecting plate, and the outer wall of the end of the first cylinder 3 is connected to the annular connecting plate by external ring welding.

[0027] In Example 2, the connection diagram of the circular-to-square-diameter section 1, the frame-shaped connecting plate 2, and the rectangular cylinder 3 is shown below. Figure 5 .

[0028] When the first cylinder is a circular cylinder, the annular connecting plate is a circular annular connecting plate. The connection structure between the first cylinder and the second cylinder (i.e., a circular cylinder, a rectangular cylinder, or a variable diameter section) is similar to the frame connecting plate used when the first cylinder is a rectangular cylinder.

[0029] Figure 1 The integrated smoke and tower device shown is only one specific application example of the connection structure of the present invention. In practical applications, the connection structure of the present invention can also be applied to the connection between the cylinders or tower walls of other container equipment.

Claims

1. A connection structure for container cylinders with different cross-sections, used to connect the ends of a first cylinder and a second cylinder, wherein the first cylinder is a circular cylinder or a rectangular cylinder, and the second cylinder is a circular cylinder, a rectangular cylinder, or a variable diameter section; the transverse inner diameter of the end of the first cylinder differs from the transverse inner diameter of the end of the second cylinder by a wall thickness δ of 2-4 times; the longitudinal inner diameter of the end of the first cylinder differs from the longitudinal inner diameter of the end of the second cylinder by a wall thickness δ of 2-4 times; wherein the wall thickness δ is the wall thickness value of the thinner of the first and second cylinders, characterized in that... The connection structure includes an annular connecting plate, which is either a circular annular connecting plate or a frame-shaped connecting plate. One axial surface of the annular connecting plate is welded to the end of the first cylinder, and the other axial surface of the annular connecting plate is welded to the end of the second cylinder.

2. The connection structure of container cylinders with different cross-sections according to claim 1, characterized in that, The first cylinder is a circular cylinder, and the annular connecting plate is a circular annular connecting plate.

3. The connection structure of container cylinders with different cross-sections according to claim 1, characterized in that, The first cylindrical body is a rectangular cylindrical body, and the annular connecting plate is a frame-shaped connecting plate.

4. The connection structure of container cylinders with different cross-sections according to any one of claims 1-3, characterized in that, The first and second cylinders with smaller cross-sectional outer contour dimensions are connected to the annular connecting plate by external ring welding at the end with an outer bevel, while the first and second cylinders with larger cross-sectional outer contour dimensions are connected to the annular connecting plate by internal ring welding at the end with an inner bevel.

5. The connection structure of container cylinders with different cross-sections according to claim 4, characterized in that, The outer wall of the first cylinder with the smaller cross-sectional outer contour dimension of the second cylinder is welded to the annular connecting plate with a plurality of evenly distributed reinforcing ribs. The outer wall of the end of the first cylinder with the larger cross-sectional outer contour dimension of the second cylinder is connected to the annular connecting plate by external ring welding.

6. The connection structure of container cylinders with different cross-sections according to claim 5, characterized in that, The transverse inner diameter, longitudinal inner diameter, transverse outer diameter, and longitudinal outer diameter of the annular connecting plate are respectively denoted as Li1, Li2, Lo1, and Lo2. The transverse inner diameter, longitudinal inner diameter, transverse outer diameter, and longitudinal outer diameter of the end of the first cylinder are respectively denoted as Li11, Li12, Lo11, and Lo12. The transverse inner diameter, longitudinal inner diameter, transverse outer diameter, and longitudinal outer diameter of the end of the second cylinder are respectively denoted as Li21, Li22, Lo21, and Lo22. The first cylinder and the second cylinder... The width of the outer weld bead between the outer wall of the end with the larger cross-sectional outer contour dimension and the annular connecting plate is denoted as K. The value of Li1 is calculated based on the negative deviation of the smaller of Li11 and Li21, the value of Li2 is calculated based on the negative deviation of the smaller of Li12 and Li22, the value of Lo1 is calculated based on the sum of the positive deviation of the larger of Lo11 and Lo21 and at least twice the value of K, and the value of Lo2 is calculated based on the sum of the positive deviation of the larger of Lo12 and Lo22 and at least twice the value of K.

7. The connection structure of container cylinders with different cross-sections according to claim 1, characterized in that, The transverse inner diameter of the end of the first cylinder differs from the transverse inner diameter of the end of the second cylinder by a wall thickness δ of 2-3 times. The longitudinal inner diameter of the end of the first cylinder differs from the longitudinal inner diameter of the end of the second cylinder by a wall thickness δ of 2-3 times.

8. The connection structure of container cylinders with different cross-sections according to claim 7, characterized in that, The transverse inner diameter of the end of the first cylinder differs from the transverse inner diameter of the end of the second cylinder by a wall thickness δ equal to twice the wall thickness δ. The longitudinal inner diameter of the end of the first cylinder differs from the longitudinal inner diameter of the end of the second cylinder by a wall thickness δ equal to twice the wall thickness δ.

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