Drum connecting ring

Abstract

The utility model relates to the technical field of caustic soda flake production and processing equipment, and discloses a drum connecting ring which comprises a connecting ring body made of stainless steel, the connecting ring body comprises an end plate connecting section used for being fixed with an end plate and a cylinder body connecting section used for being fixed with a cylinder body, the end plate connecting section and the cylinder body connecting section are integrally formed parts, and the end plate connecting section and the cylinder body connecting section are integrally formed parts. The thickness of the connecting ring body is 1 / 3-1 / 2 of the thickness of the end plate and 1-1.5 times of the thickness of the cylinder body. According to the utility model, the problems of easy cracking and tensile deformation of the drum barrel body can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of solid caustic soda manufacturing, and particularly relates to a drum connecting ring. Background Art

[0002] Caustic soda is one of the earliest developed chemical industries in China and is widely used in various industries, such as the manufacture of chemical drugs, papermaking, aluminum smelting, tungsten smelting, rayon, artificial cotton, and soap manufacturing industries. The annual demand for caustic soda basically remains at about 38 million tons. It can be seen that the annual demand is very large. However, after half a century of development, the caustic soda manufacturing process has basically matured, and under market competition, the sales unit price is basically transparent. As an enterprise producer, to survive and develop in the market competition, it is an inevitable trend to improve product quality, increase production efficiency, and reduce manufacturing costs.

[0003] Flake caustic soda is sheet-shaped caustic soda. In the preparation of flake caustic soda, a drum device is required. Traditional drums are usually of a cage structure, generally including a framework, with a cylinder body covered on the outside of the framework. Both ends of the cylinder body are hermetically connected with end plates, and the end plates are connected to a power device. By driving the end plates through the power device, the end plates drive the drum cylinder to rotate. When the caustic soda solution attached to the cylinder body forms a solid, the solid caustic soda is scraped off from the outer wall of the drum by a scraper, and then the production and processing of caustic soda (flake caustic soda) are carried out.

[0004] Caustic soda has strong corrosiveness, and the drum materials currently used in the industry are usually carbon steel or nickel. Among them, the drum made of carbon steel has poor corrosion resistance and a short service life, usually less than 1 year. And as the use time increases, generally after using for half a year, the quality of flake caustic soda decreases, which requires shutdown for maintenance, and then start the machine again for the production of flake caustic soda. However, each start-up and shutdown of the equipment will result in a section of waste caustic soda, and frequent start-up and shutdown operations will lead to the generation of a large amount of waste caustic soda, thereby greatly increasing the production cost of flake caustic soda. Compared with the drum made of carbon steel, the drum made of nickel has better corrosion resistance and can better make up for the defects of the drum made of carbon steel. However, the nickel drum not only has a high cost but also a long delivery period, which undoubtedly greatly increases the investment in equipment costs.

[0005] On the above premise, through decades of painstaking research, the inventor found that compared with carbon steel and nickel materials, high-strength steel has the advantages of good corrosion resistance and low price, and is a better choice as the material of the drum. However, when preparing caustic soda flakes, the cooling medium in the drum needs to cool down the caustic soda adhering to the surface of the drum through the cylinder body of the drum to form caustic soda flakes. However, the heat transfer coefficient of high-strength steel is poor. Using a drum made of this material for the production and processing of caustic soda flakes will undoubtedly affect the cooling effect of the cooling medium on the caustic soda. In this regard, the inventor thought of a better solution to ensure the cooling effect of the caustic soda by reducing the thickness of the drum cylinder body. However, the cylinder body of the drum rotates by the direct drive of the end plate during operation. During the operation process, the cylinder body bears a large torque from the end plate and is also affected by the large thermal expansion of the caustic soda at high temperature. The thinner the thickness of the cylinder body, the more likely it is to crack and stretch during operation, and the shorter the service life of the drum will be. Utility Model Content

[0006] The present utility model aims to provide a drum connection ring to solve the problem of easy deformation and cracking of the cylinder body.

[0007] To achieve the above object, the present utility model adopts the following technical solution: A drum connection ring, including a connection ring body made of stainless steel. The connection ring body includes an end plate connection section for fixing to the end plate and a cylinder body connection section for fixing to the cylinder body. The end plate connection section and the cylinder body connection section are integrally formed. The thickness of the connection ring body is 1 / 3 to 1 / 2 times the thickness of the end plate and 1 to 1.5 times the thickness of the cylinder body.

[0008] The principle of this solution is to fix the connection ring of this solution between the end plate and the cylinder body by welding. Since the connection ring is made of stainless steel and the cylinder body and the end plate are made of high-strength steel, the deformation amount of high-strength steel is less than that of stainless steel. When the cylinder body deforms, first, the stress of the cylinder body is transferred to the connection ring. Because the end plate connection section and the cylinder body connection section are integrally formed, part of the stress is transferred from the cylinder body connection section to the end plate connection section. The end plate connection section is welded and fixed to the end plate. The thickness of the end plate connection section is thinner than that of the end plate. In this way, the torque and deformation effects on the end plate and the cylinder body are effectively weakened at the connection ring, thus effectively avoiding problems such as cracking, deformation, and curling of the end of the cylinder body, and extending the service life of the equipment.

[0009] After continuous attempts by the inventors, the thickness of the connecting ring body is selected to be 1 / 3 to 1 / 2 times the thickness of the end plate, that is, the connecting ring body part connected to the end plate is 1 / 3 to 1 / 2 times the thickness of the end plate, and at the same time, it is selected to be 1 to 1.5 times the thickness of the cylinder, that is, the connecting ring body part connected to the cylinder is 1 to 1.5 times the thickness of the cylinder; the drum using this connecting ring structure can maintain the cylinder, connecting ring and end plate without cracking for at least 5 years. Ultimately, the service life of the entire drum is extended, the equipment cost is reduced, and the production capacity of flake caustic soda is effectively improved.

[0010] Furthermore, the length of the end plate connecting section is greater than that of the cylinder connecting section; since the end plate connecting section is on the outside of the end plate when it is welded and is in a state of fitting the end plate, the deformation of the cylinder connecting section is due to stress deformation caused by heat, but the force applied to the end plate connecting section is more caused by the lateral component of the cylinder deformation, so the welding length of the end plate welding end is made longer than that of the cylinder connecting section, so as to ensure that the connection with the end plate will not crack.

[0011] Furthermore, the cross section of the connecting ring body is L-shaped, and the end plate connecting section and the cylinder connecting section are respectively located on two vertical sides of the connecting ring body. The connecting ring body is L-shaped, firstly to fit the position relationship between the end plate and the cylinder itself, to facilitate the connection and assembly between the end plate, the cylinder and the connecting ring, and in addition, the stress of the end plate connecting section and the cylinder connecting section will be concentrated at the bending position of the L shape, which is more conducive to the elimination of stress.

[0012] Furthermore, the connecting ring body is provided with a stress relief section on one side of the end plate connecting section, and the stress relief section is located between the end plate connecting section and the cylinder connecting section. Considering that the stress is concentrated at the bending part, but the stress relief at the bending part cannot be solved by increasing the thickness of the connecting ring without limit, the inventor thought of transferring part of the stress to the end plate connecting section, so a stress relief section is designed on the side of the end plate connecting section close to the cylinder connecting section, and the stress relief section is not connected to the end plate. At this time, the stress relief section can bear the lateral force generated by the deformation of the cylinder connecting section, so as to avoid cracking or deformation of the connecting ring body as much as possible.

[0013] Furthermore, the length of the stress relief section is 1 / 3 of the length of the end plate connecting section. After continuous attempts, it was found that with this ratio, the stress relief section is within a reasonable deformation range and will not break or deform.

[0014] Furthermore, the length of the end plate connecting section is 40mm to 60mm; the drum connecting ring is used on a drum with a cylinder diameter of 1800mm to 2200mm. Because the end plate connecting section is proportional to the cylinder connecting section and the stress relief section, the design of the entire connecting ring can be completed as long as the length of the end plate connecting section is determined.

[0015] Furthermore, the end face and the inner side face of the end plate connection section are both welding surfaces; the welding surfaces are used for plugging and fixing with the end plate. During welding, by arranging a plug-in interface on the end face of the end plate, the welding surface of the connection ring end plate connection section is inserted into the plug-in interface for connection and combination between the two. In this way, the end plate connection section is completely sunk into the plug-in interface of the end plate. First, the overall aesthetics and integrity are optimized. At the same time, after the end plate connection section sinks, the welding of the end plate becomes easy and the precision increases because there is a sunken standard seal during welding. When the end plate and the end plate connection section are completely fitted, their strength is enhanced.

[0016] Furthermore, the connection ring body is an integral nickel-based alloy forging. As a flexible part that bears deformation, the connection ring is made of nickel-based alloy forging, and its toughness is better.

[0017] Furthermore, the thickness of the connection ring body is 8 mm to 10 mm. Considering the diameter of the manufactured drum, the diameter of the drum is 1800 mm to 2200 mm. The thickness of the connection ring body is designed to be 8 mm to 10 mm. After testing, it can ensure that the deformation amount of the connection ring body is within a reasonable range.

[0018] Furthermore, the stress relief section and the cylinder connection section are in arc transition; through the arc transition, the stress can be better dispersed to the entire arc surface, and the thickness at the corner is enhanced. Description of the Drawings

[0019] Figure 1 It is a partial structural schematic diagram of the drum in Embodiment 1.

[0020] Figure 2 It is Figure 1 a partial enlarged view at A in Detailed Description of the Specific Embodiment

[0021] The following is further detailed through specific embodiments:

[0022] The reference numerals in the drawings of the specification include: cylinder 1; end plate 2; connection ring body 3; end plate connection section 31; cylinder connection section 32; stress relief section 33.

[0023] Embodiment 1

[0024] As shown in the Figure 1 and Figure 2 drawings, in which the drum connection ring is specifically as shown in the Figure 2 drawing. The drum connection ring selects a connection ring body 3 made of stainless steel forging, specifically a nickel-based alloy forging.

[0025] The connecting ring body 3 includes an end plate connecting section 31 for tightly fixing to the end plate 2 and a cylinder body connecting section 32 for tightly fixing to the cylinder body 1. The end plate connecting section 31 and the cylinder body connecting section 32 are integrally formed parts.

[0026] The length of the end plate connecting section 31 is greater than the length of the cylinder body connecting section 32. The cross-section of the connecting ring body 3 is L-shaped, and the end plate connecting section 31 and the cylinder body connecting section 32 are respectively located on two perpendicular sides of the connecting ring body.

[0027] On one side of the connecting ring body where the end plate connecting section 31 is provided, a stress relief section 33 is also provided. The stress relief section 33 is located between the end plate connecting section 31 and the cylinder body connecting section 32. The end face and the inner side face of the end plate connecting section 31 are both welding surfaces; the welding surfaces are used for plugging and fixing with the end plate 2, and there is an arc transition between the stress relief section 33 and the cylinder body connecting section 32.

[0028] The length of the stress relief section is 1 / 3 of the length of the end plate connecting section. The length of the end plate connecting section is 40 mm to 60 mm (excluding the weld length). The thickness of the connecting ring body is 8 mm to 10 mm.

[0029] Examples 2 to 5:

[0030] Examples 2 to 5 select common standard cylinders as experimental objects. The diameter of the standard cylinder is 2260 mm, the thickness of the cylinder body is 8 mm, and the thickness of the end plate is 30 mm. And according to the structure of Example 1 for the parameters, the dimensions of the connecting rings in Examples 2 to 5 are used between the cylinder body and the end plate.

[0031] According to the thickness of the end plate connecting section being 1 / 3 to 1 / 2 times the thickness of the end plate, and the thickness of the cylinder body connecting section being 1 to 1.5 times the thickness of the cylinder body. Therefore, the thickness of the end plate connecting section is between 10 mm and 15 mm; the thickness of the cylinder body connecting section is between 8 mm and 12 mm.

[0032] The length of the stress relief section is 1 / 3 of the length of the end plate connecting section. The length of the end plate connecting section is 40 mm to 60 mm; then the length of the stress relief section is about 13 mm to 20 mm. It is only necessary that the length of the end plate connecting section is greater than the length of the cylinder body connecting section. In the following examples, the length of the cylinder body connecting section is selected as 25 mm, and the thickness of the cylinder body connecting section is selected as 8 mm.

[0033] By adjusting the parameters of the thickness and the length of the two key end plate connecting sections of the connecting ring body, the experimental table of the service life of the drum is as follows.

[0034]

[0035] In Example 2, with other parameters unchanged, the thickness of the end plate connection section is selected to be < 10 mm, and the length of the end plate connection section is changed. The drum life tests are respectively carried out for dimensions between < 40 mm, 40 mm - 50 mm, 50 mm - 60 mm, and > 60 mm. In the examples represented by range values, the midpoint value can be arbitrarily selected according to the convenience of production.

[0036] The conclusions obtained are as follows: when the length of the end plate connection section is < 40 mm, the service life of the drum is < 1 year; when the length of the end plate connection section is between 40 mm and 50 mm, the service life of the drum is between 1 and 1.5 years; when the length of the end plate connection section is between 50 mm and 60 mm, the service life of the drum is < 1 year; when the length of the end plate connection section is > 60 mm, the service life of the drum is < 1 year.

[0037] In Example 2, the life is not improved. Only when the length of the end plate connection section is between 40 mm and 50 mm, the service life of the drum is slightly improved.

[0038] In Example 3, the parameters are further adjusted. The thickness of the end plate connection section is selected to be 10 mm - 12 mm, and the length of the end plate connection section is also changed for dimensions between < 40 mm, 40 mm - 50 mm, 50 mm - 60 mm, and > 60 mm, and then the drum life test is carried out.

[0039] The conclusions obtained are as follows: when the length of the end plate connection section is < 40 mm, the service life of the drum is 2 - 3 years; when the length of the end plate connection section is between 40 mm and 50 mm, the service life of the drum is 3 - 5 years; when the length of the end plate connection section is between 50 mm and 60 mm, the service life of the drum is > 5 years; when the length of the end plate connection section is > 60 mm, the service life of the drum is 3 - 5 years.

[0040] In Example 3, we can see that for each group of tests, the service life of the drum can be improved. Especially between 40 mm and 50 mm and between 50 mm and 60 mm, the service life of the drum is > 5 years.

[0041] In Example 4, the parameters are further adjusted. The thickness of the end plate connection section is selected to be 12 mm - 15 mm, and the length of the end plate connection section is also changed for dimensions between < 40 mm, 40 mm - 50 mm, 50 mm - 60 mm, and > 60 mm, and then the drum life test is carried out.

[0042] The conclusions obtained are as follows: when the length of the end plate connection section is < 40 mm, the service life of the drum is 1 - 2 years; when the length of the end plate connection section is between 40 mm and 50 mm, the service life of the drum is > 5 years; when the length of the end plate connection section is between 50 mm and 60 mm, the service life of the drum is 3 - 5 years; when the length of the end plate connection section is > 60 mm, the service life of the drum is 1 - 2 years.

[0043] In Example 4, the life of the drum is improved compared with the prior art. However, compared with Example 3, the improvement in the service life of the drum has decreased slightly.

[0044] In Example 5, the parameter range of the thickness of the end plate connection section was adjusted again. The thickness of the end plate connection section was selected to be >15 mm, and the lengths of the end plate connection section were also compared at <40 mm, 40 mm to 50 mm, 50 mm to 60 mm, and >60 mm, and then the life of the drum was tested.

[0045] The conclusions obtained are as follows: when the length of the end plate connection section is <40 mm, the service life of the drum is <1 year; when the length of the end plate connection section is between 40 mm and 50 mm, the service life of the drum is 2 to 3 years; when the length of the end plate connection section is between 50 mm and 60 mm, the service life of the drum is 1 to 2 years; when the length of the end plate connection section is >60 mm, the service life of the drum is <1 year.

[0046] In Example 5, when the length of the end plate connection section is <40 mm and >60 mm, the life of the drum is not improved. Only when the length of the end plate connection section is between 40 mm and 50 mm and between 50 mm and 60 mm, the service life of the drum is slightly improved.

[0047] In summary, selecting a thickness of 10 mm to 12 mm for the end plate connection section and a length of 40 mm to 50 mm for the end plate connection section can increase the service life of the entire drum.

[0048] The above are only examples of the present invention. Well-known specific technical solutions and / or common knowledge such as characteristics are not described in detail here. It should be noted that for those skilled in the art, without departing from the technical solution of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicality of the patent. The protection scope required by this application should be subject to the content of its claims, and the specific implementation manners described in the specification can be used to explain the content of the claims.

Claims

1. Drum connection ring, Characterized in that: It includes a connection ring body made of stainless steel. The connection ring body includes an end plate connection section for fixing to the end plate and a cylinder connection section for fixing to the cylinder body. The end plate connection section and the cylinder connection section are integrally formed. The thickness of the connection ring body is 1 / 3 to 1 / 2 times the thickness of the end plate and 1 to 1.5 times the thickness of the cylinder body.

2. The drum connection ring according to claim 1, Characterized in that: The length of the end plate connection section is greater than the length of the cylinder connection section.

3. The drum connection ring according to claim 1, Characterized in that: The cross-section of the connection ring body is L-shaped, and the end plate connection section and the cylinder connection section are respectively located on two perpendicular sides of the connection ring body.

4. The drum connection ring according to claim 1, Characterized in that: On one side of the connection ring body where the end plate connection section is provided, a stress relief section is also provided, and the stress relief section is located between the end plate connection section and the cylinder connection section.

5. The drum connection ring according to claim 4, Characterized in that: The length of the stress relief section is 1 / 3 of the length of the end plate connection section.

6. The drum connection ring according to claim 2, Characterized in that: The length of the end plate connection section is 5 mm to 8 mm.

7. The drum connection ring according to claim 5 or 6, Characterized in that: The end face and the inner side face of the end plate connection section are both welding surfaces; the welding surfaces are used for plugging and fixing with the end plate.

8. The drum connection ring according to claim 7, Characterized in that: The connection ring body is an integral stainless steel forging.

9. The drum connection ring according to claim 7, Characterized in that: The thickness of the connection ring body is 8 mm to 10 mm.

10. The drum connection ring according to claim 5, Characterized in that: The stress relief section and the cylinder connection section are in arc transition.

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