Outer distributor assembly structure for eliminating expansion stress
By designing an external distributor assembly structure that eliminates expansion stress including an external distributor, an external cylinder section and an inner cylinder, the cracking problem caused by the expansion stress of the temperature control converter is solved, and the stability of the structure and energy consumption are reduced.
Patent Information
- Application Number
- CN202422391057.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-29
- Publication Date
- 2025-06-06
- Estimated Expiration
- 2034-09-29
AI Technical Summary
The internal and external distributors of the temperature-controlled converter furnaces produce expansion stress due to thermal expansion and contraction, resulting in cracks or fractures of the connecting welds. The existing expansion joints cannot be suitable for large-scale converter furnaces.
An external distributor assembly structure is designed to eliminate expansion stress, including an external distributor, an external cylinder section and an inner cylinder body. The lower end of the external cylinder section is suspended, the inner cylinder is relatively fixed to the outer cylinder section, and the bolts move up and down in the long hole of the inner cylinder body to cooperate with the expansion and contraction of the external distributor.
It effectively eliminates the expansion stress of the external distributor during operation, reduces energy consumption, saves equipment production costs, and is suitable for narrow situations.
Smart Images
Figure CN222943478U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of conversion furnaces, in particular to an external distributor assembly structure that eliminates expansion stress. Background Art
[0002] During the operation of the temperature-controlled conversion furnace, a large amount of heat will be released due to the continuous reaction of the catalyst. Although the circulating water in the heat exchange tube takes away part of the heat, the distributor in the furnace will still undergo a certain axial thermal displacement, generating expansion stress. If there is no structural device to release this stress, it is bound to cause cracks or even fractures in the connecting welds of the distributors inside and outside the furnace, thus affecting the operation effect of the entire equipment. At present, the common structures on the market to eliminate expansion stress are expansion joints. As an elastic compensation element, its working principle is based on the expansion and contraction ability of the bellows. Through this deformation, the dimensional changes caused by thermal expansion and contraction of the equipment are absorbed, or the axial, lateral and angular displacements of the equipment are compensated. Improve the stability and service life of the equipment, but the expansion joint is used in the internal parts of the temperature-controlled conversion furnace. There are the following problems: First, a certain distance must be ensured between the distributor in the temperature-controlled conversion furnace and the equipment shell to form an air intake annular gap, that is, an air intake channel. Because the air intake channel is too narrow and the expansion joint has a certain wave height, the installation space is limited and the expansion joint cannot be set, so it is not suitable for the internal parts of the temperature-controlled conversion furnace. Secondly, the temperature-controlled conversion furnace tends to be larger, resulting in a larger diameter of the distributor. The diameter of the current equipment distributor is usually around DN3000-4000mm. It is very expensive to purchase expansion joints of this size and difficult to manufacture. From an economic point of view, expansion joints are not used to eliminate expansion stress. Utility Model Content
[0003] The technical problem to be solved by the utility model is to provide an external distributor assembly structure that eliminates expansion stress and solves the problem of overall cracking caused by thermal expansion of internal and external distributors of a conversion furnace.
[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is:
[0005] An external distributor assembly structure for eliminating expansion stress comprises a vertical external distributor, wherein the upper end of the external distributor is fixed, an external cylinder section is extended downward from the lower end of the external distributor, the lower end of the external cylinder section is a suspended free end, a vertical inner cylinder body is arranged near the lower side of the external cylinder section, the lower end of the inner cylinder body is fixed, the upper end of the inner cylinder body is a suspended free end, a bolt is vertically arranged near the lower end of the external cylinder section, a vertical long hole is opened in the inner cylinder body relative to the bolt, a nut end of the bolt extends from the long hole, and a stud end of the bolt is fixed on the external cylinder section, and when the external cylinder section expands and contracts along the vertical direction due to temperature changes with the external distributor, the bolt can move up and down in the long hole of the inner cylinder body.
[0006] As a preferred embodiment, a gap is left between the inner cylinder body and the outer cylinder segment.
[0007] As a preferred embodiment, the outer distributor, outer cylinder section and inner cylinder are coaxial annular cylinders, the outer wall close to the outer distributor is surrounded by an outer shell, the inner cylinder is arranged in the inner cavity of the outer cylinder section and close to the inner wall, the top of the outer distributor is fixed to the bottom of the sealing plate, and the outer wall of the sealing plate is fixed to the inner wall of the outer shell.
[0008] As a preferred embodiment, a rib plate is provided on a side surface of the outer cylinder section away from the inner cylinder body.
[0009] As a preferred embodiment, the inner side surface of the outer cylinder section is surrounded by a circular first round steel, the first round steel is arranged above the inner cylinder body, and a circular second round steel is arranged on the top of the inner cylinder body.
[0010] As a preferred embodiment, a circular second round steel is arranged on the top of the inner cylinder, and a side of the second round steel close to the outer cylinder section is embedded in the top of the gap.
[0011] As a preferred embodiment, the inner cavity of the external distributor is filled with a catalyst, and wire meshes are arranged around the sides and bottom of the catalyst.
[0012] The beneficial effects of the utility model are as follows: the external distributor assembly structure for eliminating expansion stress is composed of partially overlapping inner cylinder and outer cylinder section, the outer cylinder section is connected to the lower end of the external distributor, the lower end of the outer cylinder section is suspended, so that the outer cylinder section can move with the extension and contraction of the external distributor, an inner cylinder is arranged on one side of the outer cylinder section, the upper end of the inner cylinder is suspended and overlaps with the outer cylinder section, the lower end of the inner cylinder is fixed, the overlapping inner cylinder and outer cylinder section complete the isolation and shielding function, the bolts on the outer cylinder section slide in the long hole of the inner cylinder, so that the movement of the outer cylinder section is within a certain position, ensuring that the overall structure is not deformed. The external distributor assembly structure for eliminating expansion stress has a simple overall structure, is easy to install, occupies a small space, and is suitable for narrow occasions. It not only eliminates the expansion stress of the external distributor during operation and reduces energy consumption, but also saves the production cost of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings, wherein:
[0014] Figure 1 It is a cross-sectional view of the utility model;
[0015] Figure 2 for Figure 1 Side view of
[0016] Figure 1~Figure 2Explanation of the reference numerals in the accompanying drawings: 1. sealing plate; 2. external distributor; 3. first round steel; 4. second round steel; 5. bolt; 6. long hole; 7. wire mesh; 8. inner cylinder; 9. outer cylinder section; 10. rib plate; 11. outer cylinder; 12. gap; 13. catalyst. DETAILED DESCRIPTION
[0017] The specific implementation scheme of the utility model is described in detail below in conjunction with the accompanying drawings.
[0018] like Figure 1~Figure 2 The outer distributor assembly structure for eliminating expansion stress shown in the figure includes a vertical outer distributor 2, the upper end of the outer distributor 2 is fixed, and the lower end of the outer distributor 2 extends downward with an outer cylinder section 9, the lower end of the outer cylinder section 9 is a suspended free end, and a vertical inner cylinder body 8 is arranged near the lower side of the outer cylinder section 9, the lower end of the inner cylinder body 8 is fixed, and the upper end of the inner cylinder body 8 is a suspended free end, and a bolt 5 is vertically arranged near the lower end of the outer cylinder section 9, and a vertical long hole 6 is opened in the inner cylinder body 8 relative to the bolt 5, the nut end of the bolt 5 extends from the long hole 6, and the stud end of the bolt 5 is fixed on the outer cylinder section 9. When the outer cylinder section 9 expands and contracts along the vertical direction due to temperature changes with the external distributor 2, the bolt 5 can move up and down in the long hole 6 of the inner cylinder body 8.
[0019] Specifically, a solid outer cylinder section 9 is added to the lower end of the outer distributor 2, and the outer cylinder section 9 is butt-welded to the outer distributor 2, and a freely movable inner cylinder body 8 is arranged on the inner side of the outer cylinder section 9. A plurality of bolts 5 are welded around the circumference of the outer cylinder section 9, and an equal number of long holes 6 are arranged on the same circumference of the inner cylinder body 8 and the outer cylinder section 9. The vertical axial dimension of the long hole 6 is determined by calculating the displacement of the outer distributor 2, and the bolt 5 slides in the long hole 6 to keep the inner cylinder body 8 and the outer cylinder section 9 at a certain relative position. The bolt 5 also acts as a directional guide rail to ensure that the inner cylinder body 8 and the outer cylinder section 9 are coaxial and do not deviate, so that the outer distributor 2 can be expanded and contracted in the vertical direction when it is heated and expanded, thereby compensating for the displacement of the outer distributor 2 when it is heated and expanded.
[0020] Figure 1 , a gap 12 is left between the inner cylinder 8 and the outer cylinder section 9. In order to ensure free movement between the inner cylinder 8 and the outer cylinder section 9, a 3mm gap 12 is left between the inner cylinder 8 and the outer cylinder section 9.
[0021] Among them, the outer distributor 2, outer cylinder section 9 and inner cylinder body 8 are coaxial annular cylinders, the outer wall close to the outer distributor 2 is surrounded by the outer shell 11, the inner cylinder body 8 is arranged in the inner cavity of the outer cylinder section 9 and close to the inner wall, the top of the outer distributor 2 is fixed to the bottom of the sealing plate 1, and the outer wall of the sealing plate 1 is fixed to the inner wall of the outer shell 11. Due to process requirements, the outer distributor 2 is welded to one side of the bottom of the sealing plate 1, and the other side of the sealing plate 1 is welded to the inner wall of the outer shell 11 of the reactor, so that an annular gap airway is formed between the outer distributor 2 and the outer shell 11. Because the outer distributor 2 and the outer shell 11 are rigidly connected, the displacement of the outer distributor 2 due to thermal expansion is limited, which will damage the function of the outer distributor 2.
[0022] The outer cylinder segment 9 is provided with a rib plate 10 on one side away from the inner cylinder body 8. A circle of rib plates 10 is welded on the outer wall of the outer cylinder segment 9 in the circumferential direction to prevent the outer cylinder segment 9 from deforming and ensure that the cavity for gas introduction is unobstructed.
[0023] like Figure 1 The inner side of the outer cylinder section 9 is surrounded by a circular first round steel 3, which is arranged above the inner cylinder body 8, and a circular second round steel 4 is arranged on the top of the inner cylinder body 8. The first round steel 3 and the second round steel 4 respectively ensure the roundness of the outer cylinder section 9 and the inner cylinder body 8 to reduce deformation.
[0024] Specifically, a circular second round steel 4 is provided at the top of the inner cylinder 8, and the side of the second round steel 4 close to the outer cylinder section 9 is embedded in the top of the gap 12. A circle of the second round steel 4 with a diameter of 10 is welded at the top of the inner cylinder section 8, and a gap of 1.5 mm is left between the second round steel 4 and the inner side wall of the outer cylinder section 9, which not only prevents the cylindrical catalyst 13 with a diameter of 3 mm from passing through the gap 12 between the inner cylinder 8 and the outer cylinder section 9 into the cavity between the outer cylinder section 9 and the outer shell 11, but also ensures that the roundness of the inner cylinder 8 and the outer cylinder section 9 is consistent.
[0025] like Figure 1 The inner cavity of the outer distributor 2 is filled with a catalyst 13, and a wire mesh 7 is arranged around the sides and bottom of the catalyst 13. The wire mesh 7 is fixed with a second round steel 3, and the wire mesh 7 can effectively prevent the catalyst 13 from entering the cavity of the outer distributor 2 and the outer shell 11 through the gap 12, so as to achieve double protection.
[0026] The working process of the utility model is as follows:
[0027] As shown in Figures 1-2, first, the conversion furnace is equipped with a catalyst 13, and the gas participating in the reaction is introduced into the cavity channel between the outer shell 11 and the outer distributor 2. The gas enters the inner cavity evenly from the outer distributor to react chemically with the catalyst 13, continuously generating heat. Then, the outer distributor 2 as a whole expands due to the heat and stretches in the vertical direction, driving the outer cylinder section 9 at the bottom to move downward, and the bolt 5 moves in the long hole. Finally, the stress of the outer distributor 2 is released.
[0028] The above embodiments are only illustrative of the principles and effects of the invention of the utility model, as well as some embodiments of its application, and are not intended to limit the invention of the utility model. It should be pointed out that a person skilled in the art can make several modifications and improvements without departing from the inventive concept of the invention, and all of these belong to the protection scope of the invention.
Claims
1. An external distributor assembly structure for eliminating expansion stress, characterized in that: The invention comprises a vertical outer distributor (2), the upper end of the outer distributor (2) is fixed, the lower end of the outer distributor (2) is downwardly extended with an outer cylinder section (9), the lower end of the outer cylinder section (9) is a suspended free end, a vertical inner cylinder body (8) is arranged near the lower side of the outer cylinder section (9), the lower end of the inner cylinder body (8) is fixed, the upper end of the inner cylinder body (8) is a suspended free end, a bolt (5) is vertically arranged near the lower end of the outer cylinder section (9), the inner cylinder body (8) is provided with a vertical long hole (6) opposite to the bolt (5), the nut end of the bolt (5) protrudes from the long hole (6), the stud end of the bolt (5) is fixed on the outer cylinder section (9), and when the outer cylinder section (9) expands and contracts along the vertical direction due to temperature changes with the outer distributor (2), the bolt (5) can move up and down in the long hole (6) of the inner cylinder body (8).
2. The external distributor assembly structure for eliminating expansion stress according to claim 1, characterized in that: A gap (12) is left between the inner cylinder body (8) and the outer cylinder section (9).
3. The external distributor assembly structure for eliminating expansion stress according to claim 1, characterized in that: The outer distributor (2), the outer cylinder section (9) and the inner cylinder body (8) are coaxial annular cylinders, the outer wall of the outer distributor (2) is surrounded by an outer cylinder body (11), the inner cylinder body (8) is arranged in the inner cavity of the outer cylinder section (9) and close to the inner wall, the top of the outer distributor (2) is fixed to the bottom of the sealing plate (1), and the outer wall of the sealing plate (1) is fixed to the inner wall of the outer cylinder body (11).
4. The external distributor assembly structure for eliminating expansion stress according to claim 1, characterized in that: A rib plate (10) is provided on a side surface of the outer cylinder section (9) away from the inner cylinder body (8).
5. The external distributor assembly structure for eliminating expansion stress according to claim 3, characterized in that: The inner side surface of the outer cylinder section (9) is surrounded by a circular first round steel (3), the first round steel (3) is arranged above the inner cylinder body (8), and a circular second round steel (4) is arranged on the top of the inner cylinder body (8).
6. The external distributor assembly structure for eliminating expansion stress according to claim 2, characterized in that: A circular second round steel (4) is provided at the top of the inner cylinder (8), and a side of the second round steel (4) close to the outer cylinder section (9) is embedded in the top of the gap (12).
7. The external distributor assembly structure for eliminating expansion stress according to claim 1, characterized in that: The inner cavity of the external distributor (2) is filled with a catalyst (13), and wire meshes (7) are arranged around the sides and bottom of the catalyst (13).