Flange cover structure

Abstract

The utility model belongs to the technical field of blind flanges, and particularly relates to a blind flange structure for special materials, which comprises a base plate, a plurality of bolt holes are circumferentially arranged in the base plate and close to the edge, a cladding plate is fixed at the top of the base plate, and the bolt holes circumferentially surround the outer side of the cladding plate. A plurality of fixing structures are further arranged between the base layer plate and the covering layer plate and used for reinforcing fixation of the covering layer plate and the base layer plate, each fixing structure comprises matched corresponding holes formed in the base layer plate and the covering layer plate, the matched corresponding holes in the base layer plate and the covering layer plate are aligned, a cylindrical pin is fixed in each matched corresponding hole, and the cylindrical pins are matched with the cylindrical pins. A leak detection hole is formed in the side face of the base layer plate, the edge position of the cladding plate is connected with the base layer plate through silver brazing, and the cylindrical pin is connected with the cladding plate through plug welding. The utility model has the advantages of simple manufacture and lower cost, and greatly improves the production and manufacture efficiency.

Description

Technical Field

[0001] The utility model belongs to the technical field of flange covers, and in particular relates to a flange cover structure. Background Art

[0002] In the field of chemical equipment, flange covers are important connection and sealing components. The material selection and manufacturing method directly affect the performance, production cost and manufacturing efficiency of the equipment. Some special material equipment, such as titanium, zirconium and nickel alloy, are widely used in key equipment and processes in chemical production due to their excellent corrosion resistance and high temperature stability. However, the manufacturing of flange covers of these special material equipment faces a series of challenges.

[0003] The traditional flange cover manufacturing method usually uses explosive composite plates as materials. Explosive composite plates are formed by combining metal plates of different materials through explosive welding technology. They have the advantages of high bonding strength and good interface quality. However, the manufacturing process of explosive composite plates is complicated, requiring professional equipment and technicians, and the procurement cycle is long and the cost is high, which not only increases the production cost of the enterprise, but also seriously affects the production efficiency of chemical equipment.

[0004] In addition, there are some limitations in the use of explosive composite plates in special material equipment. For example, for some special materials, the manufacturing of explosive composite plates is more difficult and prone to quality problems. At the same time, during long-term use, due to the difference in thermal expansion coefficients between different materials, the explosive composite plates may cause cracks or fall off at the interface, thus affecting the sealing and safety of the equipment.

[0005] Therefore, in order to solve the above problems, the present application proposes a novel flange cover structure for special materials. Utility Model Content

[0006] The utility model aims to provide a flange cover structure, which is simple to manufacture, has low cost and greatly improves production efficiency.

[0007] The technical solution adopted by the utility model is as follows:

[0008] A flange cover structure comprises a base plate, wherein a plurality of bolt holes are arranged circumferentially inside and near the edge of the base plate, a cladding plate is fixed on the top of the base plate, and the bolt holes circumferentially surround the outer side of the cladding plate;

[0009] A plurality of fixing structures are further provided between the base plate and the cladding plate, and the fixing structures are used to strengthen the fixing of the cladding plate and the base plate.

[0010] Each of the fixing structures includes matching holes arranged inside the base plate and the cladding plate, and the matching holes on the base plate and the cladding plate are aligned, and a cylindrical pin is fixed inside the matching hole.

[0011] A leak detection hole is arranged on the side of the base plate.

[0012] The roughness of the base plate and the cladding plate on the sides close to each other is Ra6.3.

[0013] The edge of the cladding plate is connected to the base plate by silver brazing, and the cylindrical pin is connected to the cladding plate by plug welding.

[0014] The height of the silver-brazed soldering feet between the cladding plate and the base plate is lower than the overall height of the cladding plate.

[0015] The technical effects achieved by the utility model are:

[0016] The utility model is simple to manufacture, low in cost, and greatly improves the production efficiency. At the same time, the flange cover of the present application also has good sealing and corrosion resistance, can meet the use requirements of special material equipment in chemical production, and shows significant advantages in cost, production efficiency and equipment performance. It not only helps to reduce the production cost of chemical equipment and improve production efficiency, but also helps to promote the sustainable development of the chemical industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 It is a top view of the utility model;

[0019] Figure 3 This utility model Figure 1 The enlarged view of point A in the middle;

[0020] Figure 4 This utility model Figure 1 Enlarged view of point B in the middle.

[0021] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0022] 1. Base plate; 2. Cladding plate; 3. Matching holes; 4. Cylindrical pin; 5. Bolt hole; 6. Leak detection hole. DETAILED DESCRIPTION

[0023] In order to make the purpose and advantages of the utility model more clear, the utility model is specifically described in combination with the following embodiments. It should be understood that the following text is only used to describe one or several specific implementations of the utility model, and does not strictly limit the protection scope of the specific request of the utility model.

[0024] like Figure 1-4 As shown, a flange cover structure includes a base plate 1, and a plurality of bolt holes 5 are arranged around the base plate 1 near the edge. Figure 2 and attached Figure 3 As shown, the base plate 1 generally uses a carbon steel plate with a thickness similar to that of the standard flange cover. The processing of the plate, the outer diameter, the center circle diameter of the bolt hole 5, the diameter of the bolt hole 5, and the number of the bolt holes 5 must be consistent with the corresponding dimensions of the flange with which it is paired, and a leak detection hole 6 is provided on the side of the base plate 1. 0.1MPa~0.3MPa compressed air is introduced into the leak detection hole 6 to check the leakage of the welding joint quality. No leakage is qualified. A cladding plate 2 is fixed on the top of the base plate 1. The roughness of the base plate 1 and the cladding plate 2 on the side close to each other is Ra6.3. The base plate 1 and the cladding plate 2 need to fit tightly without warping. The cladding plate 2 and the special material equipment are made of a material, such as titanium, zirconium, nickel alloy, etc., and the bolt hole 5 is circumferentially surrounded by the outer side of the cladding plate 2. The cladding plate 2 is connected to the base plate 1, and the outer diameter is within the bolt hole 5, and a certain welding allowance needs to be left;

[0025] A plurality of fixing structures are further provided between the base plate 1 and the cladding plate 2 , and the fixing structures are used to strengthen the fixing of the cladding plate 2 and the base plate 1 .

[0026] See attached Figure 3-4 Each fixing structure includes a matching corresponding hole 3 arranged inside the base plate 1 and the cladding plate 2, and the matching corresponding holes 3 on the base plate 1 and the cladding plate 2 are aligned, and a cylindrical pin 4 is fixed inside the matching corresponding hole 3. The cylindrical pin 4 is made of the same material as the cladding plate 2. The cylindrical pin 4 is installed in the matching corresponding hole 3 of the base plate 1 and the cladding plate 2, and the base plate 1 and the cladding plate 2 are connected by interference fit, so that the base plate 1 and the cladding plate 2 are combined into one body and have a certain bonding strength, so that the flange cover forms a whole;

[0027] The edge of the cladding plate 2 is connected to the base plate 1 by silver brazing, and the cylindrical pin 4 is connected to the cladding plate 2 by plug welding. The height of the silver brazing foot between the cladding plate 2 and the base plate 1 is lower than the overall height of the cladding plate 2 to ensure sealing;

[0028] The number of holes 3 corresponding to this match is DN≤300, 4 evenly distributed; 300<DN≤600, 6 evenly distributed + 1 in the center;

[0029] The gap between the upper end of the cylindrical pin 4 and the upper end surface of the cladding plate 2 is welded, and the cylindrical pin 4 and the cladding plate 2 are welded to ensure sealing to prevent the base plate 1 from contacting the equipment medium. The effective flange cover ensures the overall strength and at the same time ensures that the base plate 1 and the cladding plate 2 have good connection strength. After welding, the upper surface is processed to make the flange cover have a good appearance.

[0030] Furthermore, the base plate 1 and the cladding plate 2 are firmly connected, have certain strength and sealing properties, are easy to manufacture, have low cost, and improve production efficiency.

[0031] The above is only a preferred embodiment of the present invention. It should be noted that, for ordinary technicians in the technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A flange cover structure, comprising a base plate (1), characterized in that: A plurality of bolt holes (5) are circumferentially arranged inside and near the edge of the base plate (1); a cladding plate (2) is fixed on the top of the base plate (1), and the bolt holes (5) circumferentially surround the outside of the cladding plate (2); a plurality of fixing structures are also arranged between the base plate (1) and the cladding plate (2), and the fixing structures are used to strengthen the fixing of the cladding plate (2) and the base plate (1); each of the fixing structures comprises a matching corresponding hole (3) arranged inside the base plate (1) and the cladding plate (2), and the matching corresponding holes (3) on the base plate (1) and the cladding plate (2) are aligned, and a cylindrical pin (4) is fixed inside the matching corresponding hole (3).

2. The flange cover structure according to claim 1, characterized in that: A leak detection hole (6) is provided on the side of the base plate (1).

3. The flange cover structure according to claim 1, characterized in that: The roughness of the base plate (1) and the cladding plate (2) on the sides close to each other is Ra6.

3.

4. The flange cover structure according to claim 1, characterized in that: The edge of the cladding plate (2) is connected to the base plate (1) by silver brazing, and the cylindrical pin (4) is connected to the cladding plate (2) by plug welding.

5. The flange cover structure according to claim 4, characterized in that: The height of the silver brazing feet between the cladding plate (2) and the base plate (1) is lower than the overall height of the cladding plate (2).

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