Corrosion-resistant large-diameter titanium plate end socket and machining method

Abstract

The invention provides a corrosion-resistant large-diameter titanium plate end socket and a machining method, and belongs to the technical field of end socket machining. Comprising a planar titanium plate sealing body, a convex titanium plate sealing body and an annular sealing body for connecting the planar titanium plate sealing body and the convex titanium plate sealing body, the annular sealing body, the convex titanium plate sealing body and the plane titanium plate sealing body are installed on the inner side and the outer side of an external sealing pipeline respectively, a double-sealing-opening structure is formed, the situation that normal use of the sealing head is affected when the convex titanium plate sealing body or the plane titanium plate sealing body is damaged by external force is avoided, and the better safety sealing effect is achieved; the convex titanium plate seal body is arranged to be of a structure formed by splicing the multiple arc-shaped sub seal bodies, challenges confronted when the large-caliber convex titanium plate seal body is integrally machined can be relieved, the size of each arc-shaped sub seal body is relatively small, machining operation is easier, a certain arc-shaped sub seal body can be corrected or remanufactured in a targeted mode, and the machining efficiency of the large-caliber convex titanium plate seal body is improved. And a large number of titanium plates can be saved.

Description

Technical Field

[0001] This invention belongs to the field of end cap processing technology, specifically a corrosion-resistant large-diameter titanium plate end cap and its processing method. Background Technology

[0002] Large-diameter end caps are components of containers for large-diameter pipelines. They can be connected to large-diameter pipelines by welding. The main function of end caps is to seal the end of the pipeline, isolating the internal and external media and achieving a sealing effect.

[0003] Large-diameter end caps play a crucial role in the engineering applications of large-diameter pipelines and containers. With the continuous development of industry, many fields such as chemical, petroleum, and pharmaceutical industries are increasingly demanding large-diameter pipelines and containers. In these industries, pipelines and containers often need to handle various complex media, including strong acids, strong alkalis, organic solvents, and high-temperature and high-pressure fluids. Under such harsh working environments, extremely high requirements are placed on the sealing performance and corrosion resistance of end caps.

[0004] Traditional end caps are prone to leakage during long-term use due to imperfect sealing structures. This not only leads to media waste but may also cause safety accidents and environmental pollution. Moreover, the overall manufacturing and processing of large-diameter end caps is more difficult, resulting in higher costs and lower production efficiency. In addition, the structural stability of large-diameter end caps is also challenged when subjected to external impacts or changes in internal media pressure, making them prone to deformation or damage, which in turn affects the normal operation of the entire pipeline and container system.

[0005] Therefore, it is necessary to develop a head structure and processing method that can ensure good sealing performance, have excellent corrosion resistance, solve the manufacturing problems of large-diameter heads, and improve structural stability. Summary of the Invention

[0006] To address the aforementioned problems, this invention provides a corrosion-resistant large-diameter titanium plate end cap and its processing method.

[0007] The technical solution of the present invention is: a corrosion-resistant large-diameter titanium plate end cap, comprising a planar titanium plate end cap, a convex titanium plate end cap, and an annular end cap for connecting the planar titanium plate end cap and the convex titanium plate end cap; The annular seal is provided with annular connecting grooves on both the upper and lower sides, and annular connecting seat for engaging with external sealing pipeline is provided around the annular connecting groove on the lower side. The convex titanium plate seal has a hollow internal structure, and the opening of the convex titanium plate seal is connected to the annular connecting groove on the same side as the annular connecting seat, while the flat titanium plate seal is connected to the annular connecting groove on the upper side. The convex titanium plate seal is composed of multiple arc-shaped sub-seals that are distributed and connected circumferentially along the corresponding annular connecting grooves. Each arc-shaped sub-seal is spliced ​​together with the others. The free ends of each arc-shaped sub-seal form an installation notch. A snap-fit ​​plate is snapped into the installation notch. Multiple flow-guiding protrusions are evenly provided at the bottom of the snap-fit ​​plate. Each arc-shaped sub-seal has a flow-guiding groove on its outer arc sidewall along its arc length. Multiple inclined guide grooves distributed from top to bottom are provided on the left and right sides of each flow-guiding groove. The inner wall of the planar titanium plate seal and the outer arc sidewalls of each arc-shaped sub-seal are all coated with anti-corrosion material.

[0008] Furthermore, the fastening plate is provided with a plurality of joint sealing modules along the circumferential direction. Each of the plurality of joint sealing modules corresponds one-to-one with the joint between two adjacent arc-shaped sub-seals. The joint sealing module includes an arc-shaped sealing plate and a joint strip with one end connected to the inner arc sidewall of the arc-shaped sealing plate and the other end having a conical pointed structure.

[0009] Explanation: Since the convex titanium plate seal is composed of several arc-shaped sub-seals, an arc-shaped sealing plate is fastened to the joint to seal and fill the gap between adjacent arc-shaped sub-seals. This is the first line of defense for sealing. This fastening method can cover the joint and prevent liquid from seeping out from the joint. At the same time, a sealing strip with a conical tip structure on the arc-shaped sealing plate is inserted into the joint. This is the second line of defense for sealing. The sealing strip and the arc-shaped sealing plate work together to form a double sealing structure, which greatly enhances the sealing effect and can effectively prevent liquid leakage in the external sealing pipeline.

[0010] Furthermore, each of the annular connecting grooves and the annular connecting seat is provided with a sealing ring, and the planar titanium plate seal body is fixedly connected to the corresponding annular connecting groove, and the convex titanium plate seal body is fixedly connected to the corresponding annular connecting groove by multiple arc bolts.

[0011] Note: The sealing ring ensures the sealing performance at the connection between the flat titanium plate seal and the annular connecting groove, the connection between each arc-shaped sub-seal and the corresponding annular connecting groove, and the connection between the external sealing pipeline and the annular connecting seat. This effectively prevents liquid or gas leakage in critical areas and ensures the overall sealing effect of the seal.

[0012] Furthermore, the sealing ring is made of PTFE or FFKM material.

[0013] Description: It can withstand various corrosive media such as strong acids, strong alkalis, and organic solvents, and can maintain good sealing performance even at high temperatures, ensuring the normal operation of the end cap.

[0014] Furthermore, the lower end of the planar titanium plate enclosure is provided with multiple vertical reinforcing struts, and the inner arc sidewall of each arc sub-enclosure is provided with a connecting seat. The multiple vertical reinforcing struts are connected one-to-one with the connecting seats on each arc sub-enclosure, and the vertical reinforcing struts are connected to each other through a reinforcing connection module.

[0015] Description: Vertical reinforcing struts are installed on the flat titanium plate seal body, and corresponding connecting seats are installed on each arc-shaped sub-seal body to ensure the mechanical strength between the flat titanium plate seal body and the arc-shaped sub-seal body, preventing damage caused by external forces. At the same time, the vertical reinforcing struts are connected by reinforcing connection modules, which can set support points between the vertical reinforcing struts, further improving the mechanical strength between the flat titanium plate seal body and the arc-shaped sub-seal body, and ensuring the reliability of the seal head.

[0016] Furthermore, the reinforcement connection module includes multiple reinforcement discs arranged in parallel along the length of each vertical reinforcement strut. Each reinforcement disc has a through-hole corresponding to each vertical reinforcement strut, and adjacent reinforcement discs are connected by multiple staggered reinforcement struts.

[0017] Explanation: When in use, the reinforcement connection module sets multiple support points between each vertical reinforcement strut using several parallel reinforcement discs. This allows the load borne by the vertical reinforcement struts to be distributed more evenly throughout the entire structure, avoiding stress concentration. This improves the overall load-bearing capacity and stability between the planar titanium plate enclosure and the arc-shaped sub-enclosure, reducing the risk of end cap structure damage due to excessive deformation. At the same time, the through-holes on each reinforcement disc limit the vertical reinforcement struts, effectively preventing displacement or sliding during use and ensuring the positional stability of the vertical reinforcement struts.

[0018] Furthermore, the anti-corrosion material is a ceramic coating with a thickness of 0.1-0.5 mm, and the angle between the inclined guide groove and the corresponding flow guide groove is 30°-60°.

[0019] Note: The thickness range of 0.1-0.5mm can form an effective isolation layer between the inner wall of the planar titanium plate seal and the outer arc sidewall of each arc sub-seal and the corrosive medium in the external sealing pipeline. At the same time, by limiting the angle between the inclined guide groove and the corresponding guide groove, it is beneficial to the collection and flow of residual liquid, improve the flow efficiency, avoid corrosion caused by liquid accumulation, and improve the service life of the seal.

[0020] Furthermore, the side wall of each arc-shaped sub-seal corresponding to the mounting notch is a curved structure, and a snap-fit ​​cylinder is provided on the snap-fit ​​plate on the side opposite to each of the drainage protrusions. The outer wall of the snap-fit ​​cylinder and the inner wall of the mounting notch are both curved structures.

[0021] Explanation: The snap-fit ​​plate is installed at the installation notch by means of the snap-fit ​​tube. During installation, the curved structure of the snap-fit ​​tube and the installation notch is used to make the contact area between the snap-fit ​​tube and the installation notch larger, thereby improving the firmness and stability of the connection.

[0022] This invention also discloses a method for processing corrosion-resistant large-diameter titanium plate end caps, comprising the following steps: S1. Cut the titanium plate to obtain a blank of the flat titanium plate seal. Then, cut the titanium plate into several blanks of arc-shaped sub-seals. Open the guide groove and inclined guide groove on the outer arc sidewall of each arc-shaped sub-seal. Then, perform surface treatment on the inner wall of the flat titanium plate seal and the outer arc sidewall of each arc-shaped sub-seal. S2. Cut the titanium plate to obtain the blank of the annular seal. Machine the annular connecting grooves on both sides of the annular seal. The dimensional accuracy of the annular connecting grooves must meet the matching requirements with the flat titanium plate seal and the convex titanium plate seal. At the same time, machine the annular connecting seat on the outer periphery of the annular connecting groove corresponding to the convex titanium plate seal. S3. Based on the size and shape of the installation notch, process the shape of the fastening plate and process several drainage protrusions at the bottom of the fastening plate; S4. Spray anti-corrosion material onto the inner wall of the planar titanium plate seal and the outer arc sidewall of each arc sub-seal to form an anti-corrosion coating with a thickness of 0.1-0.5mm; S5. Fix the flat titanium plate seal body to the corresponding annular connecting groove with arc bolts. Then connect the opening of each arc sub-seal body to the annular connecting groove on the same side of the annular connecting seat to form a convex titanium plate seal body structure. Install the snap-fit ​​plate at the installation notch. Finally, snap the external sealing pipeline into the annular connecting seat.

[0023] Compared with the prior art, the beneficial effects of the present invention are: This invention provides a corrosion-resistant large-diameter titanium plate end cap. A ring-shaped sealing body is used to install convex and flat titanium plate end caps on the inner and outer sides of an external sealing pipeline, forming a double-sealing structure. This prevents damage to either the convex or flat titanium plate end caps from external forces, ensuring normal use of the end cap and providing a better sealing effect. Furthermore, the convex titanium plate end cap, due to its raised arc-shaped structure, can mitigate the impact of water flow. Additionally, the inclusion of drainage protrusions helps to decompose the water pressure, contributing to the long-term protection of the structural integrity of the convex titanium plate end cap. The convex titanium plate end cap is designed as a structure composed of several arc-shaped sub-end caps joined together. This design alleviates the challenges of machining large-diameter convex titanium plate seals. Each arc-shaped sub-seal is relatively small, making it easier to process. Targeted modifications or remanufacturing of specific arc-shaped sub-seals can be performed, saving significant amounts of titanium plate. Each arc-shaped sub-seal's outer wall is equipped with guide grooves and inclined guide grooves, facilitating the collection and flow of residual liquid, improving flow efficiency, preventing corrosion caused by liquid accumulation, and extending the seal's service life. By spraying anti-corrosion material onto the inner wall of the flat titanium plate seal and the outer arc sidewalls of each arc-shaped sub-seal, an effective isolation layer is formed between the seal and the corrosive media within the external sealing pipeline, resulting in excellent corrosion resistance. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall connection structure of the present invention; Figure 2 This is a schematic diagram of the internal connection of the reinforced connection module of the present invention during installation; Figure 3 This is a cross-sectional view of the annular seal of the present invention; Figure 4 This is a perspective view of the annular seal of the present invention; Figure 5 This is a structural schematic diagram of the reinforced connection module of the present invention; Figure 6 This is a front view of the assembled arc-shaped sub-seals when the snap-fit ​​plate of the present invention is not installed; Figure 7 This is a front view of the splicing of each arc-shaped sub-seal body during the installation of the snap-fit ​​plate of the present invention; Figure 8 This is a side view of the snap-fit ​​plate of the present invention; Figure 9 This is a schematic diagram of the arc-shaped sealing plate of the present invention.

[0025] Among them, 1-flat titanium plate seal, 10-vertical reinforcing strut, 2-convex titanium plate seal, 20-arc sub-seal, 200-connecting seat, 21-installation notch, 22-fastening plate, 220-sealing module for patching, 221-arc sealing plate, 222-sealing strip, 223-clamping cylinder, 23-drainage protrusion, 24-guide groove, 25-inclined guide groove, 26-reinforcing connection module, 260-reinforcing disc, 261-through opening, 262-reinforcing strut, 3-ring seal, 30-ring connecting groove, 300-sealing ring, 301-arc bolt, 31-ring connecting seat. Detailed Implementation

[0026] To further understand the content of the present invention, the present invention will be described in detail below through embodiments.

[0027] Example 1: As Figure 1 , 3 As shown in Figure 4, a corrosion-resistant large-diameter titanium plate end cap includes a planar titanium plate end cap 1, a convex titanium plate end cap 2, and an annular end cap 3 for connecting the planar titanium plate end cap 1 and the convex titanium plate end cap 2. The annular seal 3 has annular connecting grooves 30 on both the upper and lower sides, and the annular connecting groove 30 on the lower side has an annular connecting seat 31 that is snapped into the external sealing pipeline. The convex titanium plate seal 2 has a hollow structure inside, and the opening of the convex titanium plate seal 2 is connected to the annular connecting groove 30 located on the same side of the annular connecting seat 31. The flat titanium plate seal 1 is connected to the annular connecting groove 30 located on the upper side. like Figure 6 As shown, the convex titanium plate seal 2 is composed of four arc-shaped sub-seals 20 that are distributed and connected circumferentially inside the corresponding annular connecting groove 30. Each arc-shaped sub-seal 20 is spliced ​​with each other, and the free ends of each arc-shaped sub-seal 20 form an installation notch 21. A fastening plate 22 is snapped into the installation notch 21. Nine flow-guiding protrusions 23 are evenly provided at the bottom end of the fastening plate 22. Each arc-shaped sub-seal 20 has a flow-guiding groove 24 on its outer arc sidewall along its arc length direction. Each flow-guiding groove 24 has six inclined guide grooves 25 distributed from top to bottom on both the left and right sides. The inner wall of the planar titanium plate seal 1 and the outer arc sidewalls of each arc sub-seal 20 are coated with anti-corrosion material, which is a ceramic coating with a thickness of 0.1 mm. The angle between the inclined guide groove 25 and the corresponding guide groove 24 is 30°, which can form an effective isolation layer between the inner wall of the planar titanium plate seal 1 and the outer arc sidewalls of each arc sub-seal 20 and the corrosive medium in the external sealing pipeline. At the same time, by limiting the angle between the inclined guide groove 25 and the corresponding guide groove 24, it is beneficial to the collection and flow of residual liquid, improve the flow efficiency, avoid corrosion caused by liquid accumulation, and improve the service life of the seal. Each annular connecting groove 30 and an annular connecting seat 31 is provided with a sealing ring 300. The planar titanium plate sealing body 1 and the corresponding annular connecting groove 30, and the convex titanium plate sealing body 2 and the corresponding annular connecting groove 30 are respectively fixedly connected by four arc bolts 301. The setting of the sealing ring 300 can ensure the sealing of the connection between the planar titanium plate sealing body 1 and the annular connecting groove 30, the connection between each arc sub-sealing body 20 and the corresponding annular connecting groove 30, and the connection between the external sealing pipeline and the annular connecting seat 31. It can effectively prevent liquid or gas leakage in key parts and ensure the overall sealing effect of the sealing head. The arc bolts 301 adopt existing technology, such as existing double-ended arc bolts. The sealing ring 300 is made of PTFE or FFKM, which can withstand a variety of corrosive media such as strong acids, strong alkalis, and organic solvents, and can maintain a good sealing effect in high-temperature environments to ensure the normal operation of the end cap.

[0028] Example 2: This example differs from Example 1 in that: The ceramic coating is 0.5 mm thick, and the angle between the inclined guide groove 25 and the corresponding guide groove 24 is 60°.

[0029] Example 3: This example describes a processing method for a corrosion-resistant large-diameter titanium plate end cap, including the following steps: S1. Cut the titanium plate to obtain a blank of the flat titanium plate seal 1. Then, cut the titanium plate into several blanks of arc-shaped sub-seals 20. Open the guide groove 24 and the inclined guide groove 25 on the outer arc sidewall of each arc-shaped sub-seal 20. Then, perform surface treatment on the inner wall of the flat titanium plate seal 1 and the outer arc sidewall of each arc-shaped sub-seal 20. S2. Cut the titanium plate to obtain the blank of the annular seal 3. Machine the annular connecting grooves 30 on both sides of the annular seal 3. The dimensional accuracy of the annular connecting grooves 30 must meet the matching requirements with the flat titanium plate seal 1 and the convex titanium plate seal 2. At the same time, machine the annular connecting seat 31 on the outer periphery of the annular connecting groove 30 corresponding to the convex titanium plate seal 2. Install the sealing ring 300 into the mounting slots in the annular connecting groove 30 and the annular connecting seat 31. S3. Based on the size and shape of the installation notch 21, process the shape of the fastening plate 22 and process several drainage protrusions 23 at the bottom of the fastening plate 22. S4. Spray anti-corrosion material onto the inner wall of the flat titanium plate sealing body 1 and the outer arc sidewall of each arc sub-sealing body 20 to form an anti-corrosion coating. After spraying, test the adhesion and thickness of the anti-corrosion coating to ensure that the thickness of the anti-corrosion coating is 0.5mm and the adhesion meets the national standard. S5. Fix the planar titanium plate seal 1 to the corresponding annular connecting groove 30 with arc bolts 301. Then fix the opening of each arc sub-seal 20 to the annular connecting groove 30 on the same side of the annular connecting seat 31 with arc bolts 301 to form a convex titanium plate seal 2 structure. Install the snap-fit ​​plate 22 at the installation notch 21. Finally, snap the external sealing pipeline into the annular connecting seat 31.

[0030] Example 4: This example differs from Example 2 in that: like Figure 7 , 8 As shown in Figure 9, four seam sealing modules 220 are provided circumferentially on the snap-fit ​​plate 22. Each of the four seam sealing modules corresponds to a seam between two adjacent arc-shaped sub-seal bodies 20. Each seam sealing module 220 includes an arc-shaped sealing plate 221 and a seam sealing strip 222, one end of which is connected to the inner arc sidewall of the arc-shaped sealing plate 221, and the other end of which is a tapered pointed structure. Since the convex titanium plate seal body 2 is composed of several arc-shaped sub-seal bodies 20, in order to seal the gaps between two adjacent arc-shaped sub-seal bodies 20... The sealing and filling process involves fastening the arc-shaped sealing plate 221 to the joint, which forms the first line of defense. This fastening method covers the joint and prevents liquid from seeping out. At the same time, the sealing strip 222 with a conical tip structure on the arc-shaped sealing plate 221 is inserted into the joint, which forms the second line of defense. The sealing strip 222 and the arc-shaped sealing plate 221 work together to form a double sealing structure, which greatly enhances the sealing effect and can effectively prevent liquid leakage in the external sealing pipeline. like Figure 2 As shown, the lower end of the planar titanium plate sealing body 1 is provided with four vertical reinforcing struts 10, and the inner arc sidewall of each arc sub-sealing body 20 is provided with a connecting seat 200. The four vertical reinforcing struts 10 are connected one-to-one with the connecting seats 200 on each arc sub-sealing body 20. The vertical reinforcing struts 10 are connected to each other through a reinforcing connection module 26. The vertical reinforcing struts 10 are provided on the planar titanium plate sealing body 1, and the connecting seats 200 are provided on each arc sub-sealing body 20 to correspond to and connect with the vertical reinforcing struts 10. This can ensure the mechanical strength between the planar titanium plate sealing body 1 and the arc sub-sealing body 20 and avoid damage caused by external forces. At the same time, the vertical reinforcing struts 10 are connected to each other through the reinforcing connection module 26, and support points can be set between the vertical reinforcing struts 10 to further improve the mechanical strength between the planar titanium plate sealing body 1 and the arc sub-sealing body 20 and ensure the reliability of the sealing head. like Figure 5As shown, the reinforcement connection module 26 includes three reinforcement discs 260 arranged parallel to each other along the length of each vertical reinforcement strut 10. Each reinforcement disc 260 has a through-hole 261 corresponding to each vertical reinforcement strut 10. Adjacent reinforcement discs 260 are connected by two staggered reinforcement supports 262. In use, the reinforcement connection module 26 uses several parallel reinforcement discs 260 to set several support points between each vertical reinforcement strut 10, which can secure the vertical reinforcement struts. The load borne by 10 is more evenly distributed throughout the entire structure, avoiding stress concentration, thereby improving the overall load-bearing capacity and stability between the planar titanium plate seal 1 and the arc-shaped sub-seal 20, reducing the risk of head structure damage due to excessive deformation. At the same time, the vertical reinforcing strut 10 is limited by the through-hole 261 on each reinforcing disc 260, which can effectively prevent the vertical reinforcing strut 10 from shifting or sliding during use, ensuring the positional stability of the vertical reinforcing strut 10. Each arc-shaped sub-seal 20 has a curved sidewall corresponding to the mounting notch 21. The snap-fit ​​plate 22 has a snap-fit ​​cylinder 223 on the side opposite to each drainage protrusion 23. The outer wall of the snap-fit ​​cylinder 223 and the inner wall of the mounting notch 21 are both curved. The snap-fit ​​plate 22 is installed at the mounting notch 21 through the snap-fit ​​cylinder 223. During installation, the mounting notch 21 and the snap-fit ​​cylinder 223 are connected by the curved structure, which increases the contact area between the snap-fit ​​cylinder 223 and the mounting notch 21, thereby improving the firmness and stability of the connection.

[0031] Example 5: This example differs from Example 3 in that: In step S5, when the snap-fit ​​plate 22 is installed at the installation notch 21, the installation notch 21 and the snap-fit ​​cylinder 223 are snapped together by the curved surface structure, and the arc-shaped sealing plate 221 located on the side of the snap-fit ​​plate 22 is snapped at the joint of two adjacent arc-shaped sub-seal bodies 20. At the same time, the sealing strip 222 with the conical tip structure on the arc-shaped sealing plate 221 is inserted into the joint to perform double sealing. In step S1, a vertical reinforcing strut 10 is machined on the side of the planar titanium plate seal 1 near the annular seal 3, and several reinforcing discs 260 are inserted between each vertical reinforcing strut 10 from left to right. In step S2, a connecting seat 200 is machined on the inner arc sidewall of each arc sub-seal 20. In step S5, when the opening of each arc sub-seal 20 is fixedly connected to the annular connecting groove 30 on the same side of the annular connecting seat 31 by arc bolts 301, the connecting seat 200 on the inner arc sidewall is inserted into the vertical reinforcing strut 10 one by one.

Claims

1. A corrosion-resistant large-diameter titanium plate end cap, comprising a planar titanium plate end cap (1), a convex titanium plate end cap (2), and an annular end cap (3) for connecting the planar titanium plate end cap (1) and the convex titanium plate end cap (2). The annular seal (3) is provided with annular connecting grooves (30) on both the upper and lower sides, and annular connecting seat (31) for engaging with external sealing pipeline is provided around the annular connecting groove (30) on the lower side. The convex titanium plate seal (2) has a hollow structure inside, and the opening of the convex titanium plate seal (2) is connected to the annular connecting groove (30) located on the same side of the annular connecting seat (31), while the flat titanium plate seal (1) is connected to the annular connecting groove (30) located on the upper side. The convex titanium plate seal (2) is composed of multiple arc-shaped sub-seals (20) that are distributed and connected circumferentially inside the corresponding annular connecting groove (30). Each arc-shaped sub-seal (20) is spliced ​​together with each other. The free ends of each arc-shaped sub-seal (20) form an installation notch (21). A snap-fit ​​plate (22) is snapped into the installation notch (21). Multiple flow-guiding protrusions (23) are evenly provided at the bottom end of the snap-fit ​​plate (22). Each arc-shaped sub-seal (20) has a flow-guiding groove (24) on its outer arc sidewall along its arc length direction. Multiple inclined guide grooves (25) distributed from top to bottom are provided on the left and right sides of each flow-guiding groove (24). The inner wall of the planar titanium plate seal (1) and the outer arc sidewall of each arc sub-seal (20) are all coated with anti-corrosion material.

2. The corrosion-resistant large-diameter titanium plate end cap according to claim 1, characterized in that, The fastening plate (22) is provided with a plurality of joint sealing modules (220) along the circumferential direction. The plurality of joint sealing modules correspond one-to-one with the joint between two adjacent arc-shaped sub-seal bodies (20). The joint sealing module (220) includes an arc-shaped sealing plate (221) and a joint strip (222) with one end connected to the inner arc sidewall of the arc-shaped sealing plate (221) and the other end having a conical pointed structure.

3. The corrosion-resistant large-diameter titanium plate end cap according to claim 1, characterized in that, Each of the annular connecting grooves (30) and the annular connecting seat (31) is provided with a sealing ring (300). The planar titanium plate seal (1) and the corresponding annular connecting groove (30) are fixedly connected by multiple arc bolts (301), and the convex titanium plate seal (2) and the corresponding annular connecting groove (30) are fixedly connected by multiple arc bolts (301).

4. The corrosion-resistant large-diameter titanium plate end cap according to claim 3, characterized in that, The sealing ring (300) is made of PTFE or FFKM.

5. The corrosion-resistant large-diameter titanium plate end cap according to claim 1, characterized in that, The lower end of the planar titanium plate enclosure (1) is provided with multiple vertical reinforcing struts (10), and each arc sub-enclosure (20) has a connecting seat (200) on its inner arc sidewall. The multiple vertical reinforcing struts (10) are connected one-to-one with the connecting seat (200) on each arc sub-enclosure (20), and the vertical reinforcing struts (10) are connected to each other through a reinforcing connection module (26).

6. The corrosion-resistant large-diameter titanium plate end cap according to claim 5, characterized in that, The reinforcement connection module (26) includes a plurality of reinforcement discs (260) arranged in parallel along the length of each vertical reinforcement strut (10). Each reinforcement disc (260) is provided with a through-hole (261) corresponding to each vertical reinforcement strut (10). Adjacent reinforcement discs (260) are connected by a plurality of staggered reinforcement struts (262).

7. The corrosion-resistant large-diameter titanium plate end cap according to claim 1, characterized in that, The anti-corrosion material is a ceramic coating with a thickness of 0.1-0.5 mm, and the angle between the inclined guide groove (25) and the corresponding flow guide groove (24) is 30°-60°.

8. The corrosion-resistant large-diameter titanium plate end cap according to claim 1, characterized in that, Each of the arc-shaped sub-seals (20) has a curved sidewall corresponding to the mounting notch (21), and a snap-fit ​​tube (223) is provided on the snap-fit ​​plate (22) on the side opposite to each of the drainage protrusions (23). The outer wall of the snap-fit ​​tube (223) and the inner wall of the mounting notch (21) are both curved.

9. A method for processing a corrosion-resistant large-diameter titanium plate end cap as described in any one of claims 1-8, characterized in that, Includes the following steps: S1. Cut the titanium plate to obtain a blank of the flat titanium plate seal (1). Then, cut the titanium plate into several blanks of arc sub-seals (20). Open the guide groove (24) and the inclined guide groove (25) on the outer arc sidewall of each arc sub-seal (20). Then, perform surface treatment on the inner wall of the flat titanium plate seal (1) and the outer arc sidewall of each arc sub-seal (20). S2. Cut the titanium plate to obtain the blank of the annular seal (3). Process the annular connecting groove (30) on both sides of the annular seal (3). The dimensional accuracy of the annular connecting groove (30) must meet the matching requirements with the planar titanium plate seal (1) and the convex titanium plate seal (2). At the same time, process the annular connecting seat (31) on the outer periphery of the annular connecting groove (30) corresponding to the convex titanium plate seal (2). S3. Based on the size and shape of the installation notch (21), process the shape of the snap-fit ​​plate (22) and process several drainage protrusions (23) at the bottom of the snap-fit ​​plate (22). S4. Spray anti-corrosion material onto the inner wall of the planar titanium plate seal (1) and the outer arc sidewall of each arc sub-seal (20) to form an anti-corrosion coating with a thickness of 0.1-0.5mm. S5. Fix the planar titanium plate seal (1) to the corresponding annular connecting groove (30) with an arc bolt (301). Then connect the opening of each arc sub-seal (20) to the annular connecting groove (30) on the same side of the annular connecting seat (31) to form a convex titanium plate seal (2) structure. Install the snap-fit ​​plate (22) at the installation notch (21). Finally, snap the external sealing pipe into the annular connecting seat (31).

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