Welding connection structure of corrosion-resistant ammonia water storage tank

Abstract

The utility model relates to the technical field of ammonia water storage tanks, in particular to a welding connection structure of a corrosion-resistant ammonia water storage tank. The side wall of the first ammonia water storage tank is a horizontal plate, the side wall of the second ammonia water storage tank and the side wall of the third ammonia water storage tank are vertical plates, and the side wall of the second ammonia water storage tank and the side wall of the third ammonia water storage tank are fixedly connected to the bottom of the side wall of the first ammonia water storage tank in parallel; the side wall of the first ammonia water storage tank, the side wall of the second ammonia water storage tank and the side wall of the third ammonia water storage tank are in butt joint, a butt joint weld is T-shaped, and the inner surfaces and the outer surfaces of the side wall of the first ammonia water storage tank, the side wall of the second ammonia water storage tank and the side wall of the third ammonia water storage tank are flush; the first protection plate is horizontally and fixedly connected to the inner surfaces of the side wall of the first ammonia water storage tank, the side wall of the second ammonia water storage tank and the side wall of the third ammonia water storage tank and covers the upper part of the T-shaped butt weld, and the second protection plate is vertically and fixedly connected to the inner surfaces of the side wall of the second ammonia water storage tank and the side wall of the third ammonia water storage tank and covers the lower part of the T-shaped butt weld. The device can reduce ammonia water stress corrosion.

Description

Technical Field

[0001] The utility model relates to the technical field of ammonia water storage tanks, in particular to a welding connection structure of a corrosion-resistant ammonia water storage tank. Background Art

[0002] Ammonia is a chemical substance widely used in many fields, including agriculture, industry, and medicine. In order to store and transport ammonia, ammonia storage tanks have become one of the necessary equipment.

[0003] The ammonia system in the coking industry contains corrosive gases such as hydrogen sulfide and hydrogen cyanide, which often cause stress corrosion at the welding joints of the ammonia storage tank, seriously affecting the normal and stable operation of the equipment.

[0004] At present, post-weld heat treatment, lining anti-corrosion and the use of stainless steel materials are commonly used to solve the problem of stress corrosion. The above measures have the disadvantages of great construction difficulty, poor use effect and high equipment investment to varying degrees. Utility Model Content

[0005] In order to overcome the above-mentioned deficiencies of the prior art, the utility model provides a corrosion-resistant welding connection structure of an ammonia water storage tank, which can reduce ammonia water stress corrosion.

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

[0007] A corrosion-resistant ammonia storage tank welding connection structure comprises a first ammonia storage tank side wall, a second ammonia storage tank side wall, a third ammonia storage tank side wall, a first protective plate and a second protective plate; the first ammonia storage tank side wall, the second ammonia storage tank side wall and the third ammonia storage tank side wall have the same thickness, the first ammonia storage tank side wall is a horizontal plate, the second ammonia storage tank side wall and the third ammonia storage tank side wall are vertical plates, the second ammonia storage tank side wall and the third ammonia storage tank side wall are parallel to each other and fixed to the bottom of the first ammonia storage tank side wall; the first ammonia storage tank side wall, the second ammonia storage tank side wall, the third ammonia storage tank side wall are parallel to each other and fixed to the bottom of the first ammonia storage tank side wall; the first ammonia storage tank side wall, the second ammonia storage tank side wall, the third The side walls of the three ammonia water storage tanks are butt-jointed, and the butt weld is T-shaped. The inner surfaces of the first ammonia water storage tank side wall, the second ammonia water storage tank side wall, and the third ammonia water storage tank side wall are flush, and the outer surfaces of the first ammonia water storage tank side wall, the second ammonia water storage tank side wall, and the third ammonia water storage tank side wall are flush; the first protective plate is horizontally fixed to the inner surfaces of the first ammonia water storage tank side wall, the second ammonia water storage tank side wall, and the third ammonia water storage tank side wall, covering the upper part of the T-shaped butt weld, and the second protective plate is vertically fixed to the inner surfaces of the second ammonia water storage tank side wall, and the third ammonia water storage tank side wall, covering the lower part of the T-shaped butt weld.

[0008] Furthermore, a first signal hole is provided on the side wall of the first ammonia water storage tank, the first signal hole is communicated with the first protection plate, and the first signal hole is sealed by a sealing bolt.

[0009] Furthermore, a second signal hole is provided on the side wall of the second ammonia water storage tank or the side wall of the third ammonia water storage tank, the second signal hole is connected to the second protection plate, and the second signal hole is sealed by a sealing bolt.

[0010] Furthermore, the upper portion of the T-shaped butt weld is located in the middle of the first protective plate and on the center line of the first protective plate.

[0011] Furthermore, the lower portion of the T-shaped butt weld is located in the middle of the second protective plate and on the center line of the second protective plate.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The utility model provides a welding joint protection plate within the sandblasting and rust removal range of the inner wall of the ammonia water storage tank, which completely covers the weld and the heat-affected zone to avoid the occurrence of stress corrosion.

[0014] The side walls of the first ammonia water storage tank, the second ammonia water storage tank and the third ammonia water storage tank are centrally butted in a T shape, and the welded joints are double-sided full penetration structures with low welding line energy and small welding heat affected zone, which further releases welding residual stress.

[0015] 2. The utility model opens a signal hole on the side wall of the covered body, uses a sealing pipe thread for sealing, and performs air filling to check the sealing performance of the protection plate after the protection plate is sealed and welded, thereby ensuring the reliability of the protection plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front cross-sectional view showing the structure of the utility model.

[0017] Figure 2 It is a schematic side view of the structure of the utility model.

[0018] In the figure: 1-side wall of the first ammonia water storage tank 2-side wall of the second ammonia water storage tank 3-side wall of the second ammonia water storage tank 4-first protection plate 5-second protection plate 6-first signal hole 7-second signal hole 8-sealing bolt 9-T-shaped butt weld 10-sealing fillet weld 11-sandblasting and rust removal area DETAILED DESCRIPTION

[0019] The embodiments of the present invention are described in detail below. In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described in combination with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] In the description of the utility model, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the utility model. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0023] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, the numerical expressions and numerical values ​​do not limit the scope of the utility model. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0024] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0025] [Example]

[0026] like Figure 1 , Figure 2 As shown, a welding connection structure of a corrosion-resistant ammonia water storage tank includes a first ammonia water storage tank side wall 1, a second ammonia water storage tank side wall 2, a third ammonia water storage tank side wall 3, a first protective plate 4 and a second protective plate 5.

[0027] The first ammonia water storage tank side wall 1, the second ammonia water storage tank side wall 2, and the third ammonia water storage tank side wall 3 have the same thickness. The first ammonia water storage tank side wall 1 is a horizontal plate, and the second ammonia water storage tank side wall 2 and the third ammonia water storage tank side wall 3 are vertical plates. The second ammonia water storage tank side wall 2 and the third ammonia water storage tank side wall 3 are parallel to each other and fixed to the bottom of the first ammonia water storage tank side wall 1. The first ammonia water storage tank side wall 1, the second ammonia water storage tank side wall 2, and the third ammonia water storage tank side wall 3 are butt-jointed, and the butt weld is T-shaped. The inner surfaces of the first ammonia water storage tank side wall 1, the second ammonia water storage tank side wall 2, and the third ammonia water storage tank side wall 3 are flush, and the outer surfaces of the first ammonia water storage tank side wall 1, the second ammonia water storage tank side wall 2, and the third ammonia water storage tank side wall 3 are flush. The welded joint is a double-sided full penetration structure, and multiple passes of welding are performed. The line energy is strictly controlled. The surfaces of the double-sided welded joints are polished to be flush with the parent material, and no weld excess height is left.

[0028] The first protective plate 4 is fixed horizontally to the inner surfaces of the first ammonia water storage tank side wall 1, the second ammonia water storage tank side wall 2, and the third ammonia water storage tank side wall 3, covering the upper part of the T-shaped butt weld 9. The second protective plate 5 is fixed vertically to the inner surfaces of the second ammonia water storage tank side wall 2 and the third ammonia water storage tank side wall 3, covering the lower part of the T-shaped butt weld 9. The upper part of the T-shaped butt weld 9 is located in the middle of the first protective plate 4 and on the center line of the first protective plate 4. The lower part of the T-shaped butt weld 9 is located in the middle of the second protective plate 5 and on the center line of the second protective plate 5. The periphery of the protective plate is continuously sealed with the side wall (parent material) of the ammonia water storage tank, and the weld leg height of the sealing fillet weld 10 is 1 mm.

[0029] A first signal hole 6 is provided on the side wall 4 of the first ammonia water storage tank. The first signal hole 6 is connected to the first protection plate 4 , and the first signal hole 6 is sealed by a sealing bolt 8 .

[0030] A second signal hole 7 is provided on the side wall 5 of the second ammonia water storage tank. The second signal hole 7 is communicated with the second protection plate 5 , and the second signal hole 7 is sealed by a sealing bolt 8 .

[0031] After each process is completed in sequence, secondary sandblasting and rust removal are carried out on the inner surface of the side wall of the ammonia storage tank including the welding joint protection plate, with a qualified grade of Sa3, and then epoxy resin paint is sprayed within the sandblasting and rust removal area 11.

[0032] The utility model sets a welding joint protection plate within the sandblasting and rust removal range of the inner wall of the ammonia water storage tank, completely covers the weld and the heat-affected zone, and avoids the occurrence of stress corrosion. The welding joint is a double-sided full-penetration structure, with low welding line energy and a small welding heat-affected zone, which further releases welding residual stress. The utility model opens a signal hole on the covered side wall of the body, uses a sealing bolt 8 for sealing, and inflates the protection plate after sealing welding to check its sealing performance, thereby ensuring the reliability of the protection plate.

[0033] The above description is only part of the specific implementation methods of the utility model, and the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the utility model according to the technical solution and utility model concept of the utility model, which should be covered by the protection scope of the utility model.

Claims

1. A corrosion-resistant ammonia water storage tank welding connection structure, characterized in that: It includes a first ammonia water storage tank side wall, a second ammonia water storage tank side wall, a third ammonia water storage tank side wall, a first protection plate and a second protection plate; The side walls of the first ammonia water storage tank, the second ammonia water storage tank and the third ammonia water storage tank have the same thickness, the side wall of the first ammonia water storage tank is a horizontal plate, the side walls of the second ammonia water storage tank and the third ammonia water storage tank are vertical plates, and the side walls of the second ammonia water storage tank and the third ammonia water storage tank are parallel to each other and fixed to the bottom of the side wall of the first ammonia water storage tank; The side walls of the first ammonia water storage tank, the second ammonia water storage tank and the third ammonia water storage tank are butt-jointed, the butt weld is T-shaped, and the inner surfaces of the side walls of the first ammonia water storage tank, the second ammonia water storage tank and the third ammonia water storage tank are flush, and the outer surfaces of the side walls of the first ammonia water storage tank, the second ammonia water storage tank and the third ammonia water storage tank are flush; The first protective plate is horizontally fixed to the inner surfaces of the side walls of the first ammonia water storage tank, the second ammonia water storage tank, and the third ammonia water storage tank, covering the upper part of the T-shaped butt weld, and the second protective plate is vertically fixed to the inner surfaces of the side walls of the second ammonia water storage tank and the third ammonia water storage tank, covering the lower part of the T-shaped butt weld.

2. The welding connection structure of a corrosion-resistant ammonia water storage tank according to claim 1, characterized in that: A first signal hole is provided on the side wall of the first ammonia water storage tank. The first signal hole is communicated with the first protection plate and is sealed by a sealing bolt.

3. The welding connection structure of a corrosion-resistant ammonia water storage tank according to claim 1, characterized in that: A second signal hole is provided on the side wall of the second ammonia water storage tank or the side wall of the third ammonia water storage tank. The second signal hole is connected to the second protection plate and is sealed by a sealing bolt.

4. The welding connection structure of a corrosion-resistant ammonia water storage tank according to claim 1, characterized in that: The upper portion of the T-shaped butt weld is located in the middle of the first protective plate and on the center line of the first protective plate.

5. The welding connection structure of a corrosion-resistant ammonia water storage tank according to claim 1, characterized in that: The lower part of the T-shaped butt weld is located in the middle of the second protection plate and on the center line of the second protection plate.

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