A fluoropolymer-lined valve flange system

Abstract

This utility model provides a fluoropolymer-lined valve flange system, belonging to the field of chemical technology. The fluoropolymer-lined valve flange system includes a base flange, a patch flange, and a corrosion-resistant liner. The base flange is located at the end of the fluoropolymer-lined pipe and has a base connection hole and a base delivery hole. The base delivery hole is located at the center of the base flange, and multiple sets of base connection holes are arranged circumferentially around the base flange. The patch flange is located on the first side wall of the base flange, and has a patch delivery hole at its center, which connects to the base delivery hole. The corrosion-resistant liner penetrates the base delivery hole and the patch delivery hole, connecting to the end of the fluoropolymer-lined pipe. This fluoropolymer-lined valve flange system, by adding a patch flange, delays the corrosion of the base flange. The patch flange is replaceable, extending the service life of the base flange, reducing safety hazards, and saving costs.

Description

Technical Field

[0001] This utility model belongs to the field of chemical technology, and specifically relates to a fluoropolymer-lined valve flange system. Background Technology

[0002] A valve is a device in a fluid system that allows or stops the flow of a medium within piping and equipment and controls its flow rate.

[0003] Fluoroplastic-lined valves, also known as fluoroplastic-lined corrosion-resistant valves, are made by molding (or embedding) polytetrafluoroethylene resin (or processed profiles) onto the inner wall of steel or iron valve pressure-bearing components (the same method applies to the linings of various pressure vessels and pipeline accessories) or the outer surface of valve internals. Fluoroplastic-lined valves are mainly used for transporting strong acids, alkalis, oxidants, or highly corrosive media. They include fluoroplastic-lined pipes and flanges, with flanges connected to the pipes. The pipes consist of a metal tube and a base lining installed on the inner wall of the metal tube. Suitable for highly corrosive environments such as chemical and pharmaceutical industries, fluoroplastic-lined valves completely isolate the medium from contact with the metal valve body and internal components, preventing corrosion of these components.

[0004] However, when valves are used to transport acidic or alkaline media, due to the permeability of these media, leaks frequently occur at the PTFE-lined flange seals under temperature variations. This leads to corrosion and damage to the metal parts of the PTFE-lined flanges in many valves, sometimes even rendering the entire valve unusable, posing a significant safety hazard to production and increasing valve replacement costs. Directly disassembling and replacing the flange, especially when the disassembly and welding areas are close to the PTFE-lined pipe and flange lining, can easily damage the lining, further increasing maintenance costs. Utility Model Content

[0005] The purpose of this utility model is to provide a fluoropolymer-lined valve flange system, which aims to solve the problem that the flanges of fluoropolymer-lined valves are prone to corrosion and damage, leading to safety hazards and increased costs.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a fluoropolymer-lined valve flange system, comprising: A base flange is a metal pipe end located at the opening of a fluoropolymer-lined pipe. The base flange is provided with a base connection hole and a base conveying hole. The base conveying hole is located at the center of the base flange, and multiple sets of the base connection holes are located around the circumference of the base flange. A patch flange is disposed on the first side wall of the base flange away from the fluoropolymer-lined pipe, and a patch delivery hole is provided at the center of the patch flange, the patch delivery hole communicating with the base delivery hole; and A corrosion-resistant lining is provided through the base conveying hole and the patch conveying hole, and is fitted to the inner wall of the base conveying hole and the patch conveying hole. The first end of the corrosion-resistant lining is connected to the end of the base lining at the opening of the fluoropolymer-lined pipe, and the corrosion-resistant lining is connected to the fluoropolymer-lined pipe.

[0007] In one possible implementation, a leveling structure is provided on the first sidewall of the base flange, the leveling structure being used to eliminate the gap between the base flange and the patch flange.

[0008] In one possible implementation, the patch flange is spot-welded to the base flange.

[0009] In one possible implementation, the outer diameter of the patch flange is the same as the outer diameter of the base flange.

[0010] In one possible implementation, the patch flange is provided with patch connection holes in the circumferential direction, and the patch connection holes are provided in a one-to-one correspondence with the base connection holes.

[0011] In one possible implementation, a patch fixing assembly is also provided for limiting the patch flange on the side wall of the base flange, including: A positioning post is provided, which passes through the patch connection hole and the base connection hole; A positioning plate is disposed on the circumferential outer wall of the patch flange and / or the base flange; and A connector that connects the positioning post to the positioning plate.

[0012] In one possible implementation, the connector is located on the side of the patch flange away from the base flange.

[0013] In one possible implementation, the connector includes: A connecting post is disposed on the upper end face of the first end of the positioning post, the connecting post extending upward and penetrating the positioning plate; and A locking nut is fitted onto the outside of the connecting post and threadedly connected to the connecting post. The locking nut is positioned above the positioning plate.

[0014] In one possible implementation, a limiting plate is provided at the upper end of the connecting column.

[0015] In one possible implementation, the patch fixing assembly is provided in at least two sets.

[0016] The beneficial effects of the fluoropolymer-lined valve flange system provided by this utility model are as follows: Compared with existing technologies, the base flange is set at the opening of the fluoropolymer-lined pipe. The base flange is connected to the metal pipe of the fluoropolymer-lined pipe. The base conveying hole in the center of the base flange is connected to the inside of the fluoropolymer-lined pipe, which is suitable for the medium in the fluoropolymer-lined pipe to flow through. The base connection hole facilitates connection with other flanges and other devices. The patch flange is installed on the first side wall of the base flange. The patch flange is located away from the fluoropolymer-lined pipe. The patch delivery hole in the center of the patch flange is corresponding to the base delivery hole in the center of the base flange and is connected to the inside of the fluoropolymer-lined pipe. This allows the medium in the fluoropolymer-lined pipe to flow through. The patch flange strengthens the base flange, prevents leakage of the medium at the base flange, and can effectively delay the corrosion process of the base flange and extend its service life. The corrosion-resistant lining is installed on the inner wall of the foundation conveying hole and the patch conveying hole. It is connected to the foundation lining of the fluoropolymer-lined pipe and is suitable for the medium to flow through the fluoropolymer-lined pipe. The corrosion-resistant lining isolates the medium from the foundation conveying hole and the patch conveying hole, reducing the corrosion of the foundation flange and the patch flange by the medium. The patch flange can be replaced. When the patch flange is severely corroded by the medium, the corroded patch flange can be cleaned and a new patch flange can be installed, which can further extend the service life of the base flange, reduce safety hazards, and save costs. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a left-side view of the patch flange used in an embodiment of the present invention. Figure 2 This is a front view structural diagram of the patch flange and the base flange used in the embodiments of this utility model; Figure 3 This is a left-side view of the basic flange used in this embodiment of the utility model. Figure 4 This is a left-side structural schematic diagram showing the installation of the connector used in this embodiment of the utility model; Figure 5 This is a front view of the connector used in the embodiment of the present utility model under the installation condition. Figure 6 This is a vertical cross-sectional structural diagram of the connector used in the embodiment of this utility model under installation conditions.

[0019] In the diagram: 1001, base flange; 1002, base connection hole; 1003, base conveying hole; 1004, leveling structure; 1005, spot welding position; 2001, patch flange; 2002, patch conveying hole; 2003, patch connection hole; 3001, corrosion-resistant lining; 4001, positioning post; 4002, positioning plate; 4003, connecting post; 4004, locking nut; 4005, limit plate; 5001, metal pipe; 5002, base lining. Detailed Implementation

[0020] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0021] Please refer to Figures 1 to 3 For ease of description, the placement orientation of the base flange 1001 and the patch flange 2001 is defined as follows: in the vertical direction, the base flange 1001 and the patch flange 2001 are vertically arranged; in the front-back direction, the sidewalls of the base flange 1001 and the patch flange 2001 are arranged along the front-back direction; and in the left-right direction, the patch flange 2001 is located to the left of the base flange 1001.

[0022] Please refer to Figures 1 to 3 The present invention provides a specific embodiment of a fluoropolymer-lined valve flange system, which includes: a base flange 1001, a patch flange 2001, and a corrosion-resistant lining 3001. The base flange 1001 is located at the end of the metal pipe 5001 at the opening of the fluoropolymer-lined pipe, and is perpendicular to the fluoropolymer-lined pipe. The base flange 1001 is provided with a base connection hole 1002 and a base conveying hole 1003. The base conveying hole 1003 is located at the center of the base flange 1001, and multiple sets of base connection holes 1002 are located around the base flange 1001. A patch flange 2001 is located on the first sidewall of the base flange 1001 away from the fluoropolymer-lined pipe. A patch delivery hole 2002 is centrally located on the patch flange 2001, and the patch delivery hole 2002 connects to the base delivery hole 1003. The corrosion-resistant lining 3001 is provided through the foundation conveying hole 1003 and the patch conveying hole 2002, and is fitted to the inner wall of the foundation conveying hole 1003 and the patch conveying hole 2002. The first end of the corrosion-resistant lining 3001 is connected to the end of the foundation lining 5002 at the opening of the fluoropolymer-lined pipe, and the corrosion-resistant lining 3001 is connected to the fluoropolymer-lined pipe.

[0023] For details, please refer to Figures 1 to 3The base flange 1001 is located at the left end of the fluoropolymer-lined pipe. The inner diameter of the base conveying hole 1003 is the same as the inner diameter of the metal pipe 5001 of the fluoropolymer-lined pipe. The two are set accordingly. The right side wall of the base flange 1001 is welded to the left end of the metal pipe 5001 of the fluoropolymer-lined pipe. The circumferential base connection hole 1002 of the base flange 1001 is suitable for the passage of tie rods or bolts, etc., for connection and fixation with other flanges or mounting parts.

[0024] The patch flange 2001 is located on the left side wall of the base flange 1001, and the two can be welded together. The inner diameter of the patch delivery hole 2002 is the same as the inner diameter of the base delivery hole 1003, and the two are set accordingly. The patch flange 2001 is located on the outside of the base flange 1001. Once there is a media leak, the media will flow through the outer wall of the patch flange 2001. The patch flange 2001 can greatly reduce the corrosion of the side wall of the base flange 1001 by the media.

[0025] The patch flange 2001 can be replaced. When the patch flange 2001 is severely corroded by the medium, the corroded patch flange 2001 can be cleaned and a new patch flange 2001 can be installed to further extend the service life of the base flange 1001, reduce safety hazards, and save costs.

[0026] The right end of the corrosion-resistant lining 3001 is connected to the end of the base lining 5002 of the fluoropolymer-lined pipe. The corrosion-resistant lining 3001 is installed through the base conveying hole 1003 and the patch conveying hole 2002. The left end of the corrosion-resistant lining 3001 extends to the left side wall of the patch flange 2001. The corrosion-resistant lining 3001 can be integrally formed with the base lining 5002 of the fluoropolymer-lined pipe to further reduce media leakage.

[0027] As a specific implementation method in actual production, the specific installation method of patch flange 2001 is as follows.

[0028] The base flange 1001 and the metal pipe 5001 of the fluoropolymer-lined pipe can be integrally formed components or connected by welding.

[0029] After the base flange 1001 and the fluoropolymer-lined pipe are installed, a base liner 5002 is installed on the inner wall of the fluoropolymer-lined pipe, and a corrosion-resistant liner 3001 is installed on the inner wall of the base conveying hole 1003 of the base flange 1001. The corrosion-resistant liner 3001 and the base liner 5002 are integrally formed components.

[0030] Optionally, when the left end of the corrosion-resistant liner 3001 is located at the left end of the base conveying hole 1003, the base flange 1001 can be connected and fixed to other flanges or mounting components. As the device is used, the base flange 1001 is corroded by the medium and becomes thinner. The sidewall of the base flange 1001 is then ground and smoothed. The thickness of the patch flange 2001 matches the length of the corrosion-resistant liner 3001 extending out of the base flange 1001. The patch flange 2001 is installed on the outside of the base flange 1001, and the corrosion-resistant liner 3001 is inserted into the patch conveying hole 2002. The patch flange 2001 supports the corrosion-resistant liner 3001. The patch flange 2001 replaces the base flange 1001 in bearing the corrosion of the medium, extending the service life of the fluoropolymer-lined valve. The operation is simple and easy.

[0031] Optionally, when the left end of the corrosion-resistant liner 3001 extends beyond the base conveying hole 1003 and is located outside the base flange 1001, the thickness of the patch flange 2001 matches the length of the corrosion-resistant liner 3001 extending out of the base flange 1001. The patch flange 2001 is installed outside the base flange 1001, and the corrosion-resistant liner 3001 is inserted into the patch conveying hole 2002. The patch flange 2001 supports the corrosion-resistant liner 3001. The patch flange 2001 replaces the base flange 1001 to withstand the corrosion of the medium, extending the service life of the fluoropolymer-lined valve. The operation is simple and easy.

[0032] Furthermore, in both of the above situations, the patch flange 2001 can be replaced. When the patch flange 2001 is excessively corroded, it can be cleaned and a new patch flange 2001 can be installed on the side wall of the base flange 1001 to further extend the service life of the fluoropolymer-lined valve.

[0033] As a specific embodiment of the fluoropolymer-lined valve flange system provided by this utility model, please refer to Figure 3 A leveling structure 1004 is provided on the first side wall of the base flange 1001. The leveling structure 1004 is used to eliminate the gap between the base flange 1001 and the patch flange 2001.

[0034] For details, please refer to Figure 3 The leveling structure 1004 is installed on the left side wall of the base flange 1001. The leveling structure 1004 is used to level the side wall of the base flange 1001. When the left side wall of the base flange 1001 is uneven, the leveling structure 1004 can fill the uneven parts of the base flange 1001, which facilitates the installation of the patch flange 2001 and eliminates the gap between the base flange 1001 and the patch flange 2001.

[0035] Furthermore, the leveling structure 1004 can be obtained by welding. At the pit, a welding gun is used to weld to obtain the leveling structure 1004. After the welding is completed, the side wall of the base flange 1001 is ground flat. After grinding it flat, the patch flange 2001 is installed. After the leveling structure 1004 fills the pit of the base flange 1001, the grinding of the base flange 1001 can be reduced, which helps to maintain the thickness of the base flange 1001.

[0036] As a specific embodiment of the fluoropolymer-lined valve flange system provided by this utility model, please refer to Figure 2 The patch flange 2001 is spot-welded to the base flange 1001.

[0037] For details, please refer to Figure 2 After the right side wall of the patch flange 2001 is attached to the left side wall of the base flange 1001, a spot welding gun is used to spot weld the patch flange 2001 and the base flange 1001 at the edge where they are attached. The spot welding position 1005 selected is at the edge where the patch flange 2001 and the base flange 1001 are attached. Multiple sets of spot welding positions 1005 can be selected and distributed along the circumference of the patch flange 2001. The spot welding positions 1005 are far away from the corrosion-resistant lining 3001. Therefore, the high temperature generated by the spot welding of the patch flange 2001 and the base flange 1001 will not affect the corrosion-resistant lining 3001 and will not reduce the service life of the corrosion-resistant lining 3001.

[0038] As a specific embodiment of the fluoropolymer-lined valve flange system provided by this utility model, please refer to Figures 1 to 3 The outer diameter of the patch flange 2001 is the same as that of the base flange 1001.

[0039] For details, please refer to Figures 1 to 3 The thickness of the patch flange 2001 is selected based on the distance between the left end of the corrosion-resistant liner 3001 and the outside of the base flange 1001. The patch delivery hole 2002 of the patch flange 2001 is used to support the corrosion-resistant liner 3001. The inner diameter of the patch delivery hole 2002 is equal to the outer diameter of the corrosion-resistant liner 3001, and the inner diameter of the patch delivery hole 2002 is equal to the inner diameter of the base delivery hole 1003. The outer diameter of the patch flange 2001 is the same as that of the base flange 1001, which facilitates welding of the patch flange 2001 and the base flange 1001 and facilitates the connection of other flanges or mounting parts.

[0040] As a specific embodiment of the fluoropolymer-lined valve flange system provided by this utility model, please refer to Figures 1 to 3 The patch flange 2001 is provided with patch connection holes 2003 in the circumferential direction, and the patch connection holes 2003 are provided in a one-to-one correspondence with the base connection holes 1002.

[0041] For details, please refer to Figures 1 to 3 Multiple sets of patch connection holes 2003 are arranged around the circumference of the patch flange 2001. The number, inner diameter, and orientation of the patch connection holes 2003 are the same as those of the base connection holes 1002, which are suitable for the passage of tie rods or bolts, etc., for connection and fixation with other flanges or mounting parts.

[0042] As a specific embodiment of the fluoropolymer-lined valve flange system provided by this utility model, please refer to Figures 4 to 6 It also includes a patch fixing assembly for limiting the patch flange 2001 to the side wall of the base flange 1001, including: a positioning post 4001, a positioning plate 4002, and a connector; the positioning post 4001 is disposed through the patch connection hole 2003 and the base connection hole 1002; the positioning plate 4002 is disposed on the circumferential outer side wall of the patch flange 2001 and / or the base flange 1001; the connector connects the positioning post 4001 and the positioning plate 4002; the connector is disposed on the side of the patch flange 2001 away from the base flange 1001.

[0043] For details, please refer to Figures 4 to 6 The patch fixing assembly is used to position the patch flange 2001, facilitating the alignment of the patch flange 2001 and the base flange 1001, improving the alignment accuracy of the patch flange 2001 and the base flange 1001, and making it easier for the corrosion-resistant liner 3001 to pass into the patch delivery hole 2002. This avoids uneven stress on the corrosion-resistant liner 3001 during the insertion process, which could cause deformation. It also helps subsequent tie rods or bolts to pass through the patch connection hole 2003 and the base connection hole 1002. After the patch flange 2001 and the base flange 1001 are welded, the patch fixing assembly can be removed to avoid affecting subsequent operations.

[0044] The positioning post 4001 is a cylinder and is set horizontally. The outer diameter of the positioning post 4001 is the same as the inner diameter of the patch connection hole 2003, which increases the stability of the device when it passes through the patch connection hole 2003.

[0045] The connector is located on the side wall of the left end of the positioning post 4001 and is arranged radially along the positioning post 4001.

[0046] The positioning plate 4002 is set at the other end of the connector. The positioning plate 4002 is set horizontally and opposite to the positioning post 4001. The positioning plate 4002 is set perpendicular to the length direction of the connector.

[0047] When the device is in use, the connector is located on the outside of the patch flange 2001 for easy use.

[0048] When using the patch fixing assembly, align the positioning pin 4001 with the patch delivery hole 2002 on the outside of the patch flange 2001. The positioning plate 4002 is located on the outside of the outer edge of the patch flange 2001 and the base flange 1001. Insert the patch fixing assembly, and the positioning pin 4001 passes through the patch delivery hole 2002 and the base connection hole 1002 to temporarily fix the patch flange 2001.

[0049] Optionally, when the outer diameters of the patch flange 2001 and the base flange 1001 are the same, the positioning plate 4002 rests against the outer edge of the patch flange 2001 and the base flange 1001 to increase the stability of the fixation.

[0050] Optionally, when the outer diameters of the patch flange 2001 and the base flange 1001 are inconsistent, the positioning plate 4002 rests against the outer edge of the component with the larger diameter in the patch flange 2001 and the base flange 1001 to increase the stability of the fixation.

[0051] As a specific embodiment of the fluoropolymer-lined valve flange system provided by this utility model, please refer to Figures 4 to 6 The connector includes a connecting post 4003 and a locking nut 4004. The connecting post 4003 is located on the upper end face of the first end of the positioning post 4001. The connecting post 4003 extends upward and penetrates the positioning plate 4002. The locking nut 4004 is sleeved on the outside of the connecting post 4003 and is threadedly connected to the connecting post 4003. The locking nut 4004 is located above the positioning plate 4002.

[0052] For details, please refer to Figures 4 to 6 The connecting post 4003 is set on the upper end face of the left end of the positioning post 4001. The connecting post 4003 is set vertically. The left end of the positioning plate 4002 is sleeved on the connecting post 4003. The positioning plate 4002 has the sliding freedom on the connecting post 4003. The locking nut 4004 is threadedly matched with the connecting post 4003. Rotating the locking nut 4004 changes the displacement of the locking nut 4004, thereby adjusting the limiting height of the positioning plate 4002, so that the positioning plate 4002 can rest against the outer edge of the base flange 1001 / pattern flange 2001.

[0053] As a specific embodiment of the fluoropolymer-lined valve flange system provided by this utility model, please refer to Figures 4 to 6 A limit plate 4005 is provided at the upper end of the connecting column 4003.

[0054] For details, please refer to Figures 4 to 6 The limiting plate 4005 is set at the upper end of the connecting column 4003 to limit the movement distance of the locking nut 4004 and prevent the locking nut 4004 and the positioning plate 4002 from falling off during use.

[0055] As a specific embodiment of the fluoropolymer-lined valve flange system provided by this utility model, please refer to Figures 4 to 6 At least two sets of patch fixing components are provided.

[0056] For details, please refer to Figures 4 to 6 The patch fixing components are provided in two sets, and any two sets of patch connection holes 2003 can be selected for insertion. The number of patch fixing components can be the same as the number of patch connection holes 2003. The patch fixing components and patch connection holes 2003 correspond one-to-one, which increases the stability of limiting the patch flange 2001.

[0057] Optionally, the patch fixing assembly can pass sequentially through the base flange 1001 and the patch flange 2001 on the outside of the base flange 1001, and simultaneously position the left and right sides of the patch flange 2001 and the base flange 1001, thereby increasing the stability of the patch flange 2001's positioning.

[0058] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fluorine-lined valve flange system, characterized by, include: A base flange is a metal pipe end located at the opening of a fluoropolymer-lined pipe. The base flange is provided with a base connection hole and a base conveying hole. The base conveying hole is located at the center of the base flange, and multiple sets of the base connection holes are located around the circumference of the base flange. A patch flange is provided on the first side wall of the base flange away from the fluoropolymer-lined pipe. The patch flange has a patch delivery hole at its center, which is connected to the base delivery hole. as well as A corrosion-resistant lining is provided through the base conveying hole and the patch conveying hole, and is fitted to the inner wall of the base conveying hole and the patch conveying hole. The first end of the corrosion-resistant lining is connected to the end of the base lining at the opening of the fluoropolymer-lined pipe, and the corrosion-resistant lining is connected to the fluoropolymer-lined pipe.

2. A lined valve flange system as claimed in claim 1, wherein, A leveling structure is provided on the first side wall of the base flange, which is used to eliminate the gap between the base flange and the patch flange.

3. A lined valve flange system as claimed in claim 1, wherein, The patch flange is spot-welded to the base flange.

4. A lined valve flange system as claimed in claim 1, wherein, The outer diameter of the patch flange is the same as the outer diameter of the base flange.

5. A lined valve flange system as claimed in claim 1, wherein, The patch flange is provided with patch connection holes in its circumference, and the patch connection holes are provided in a one-to-one correspondence with the base connection holes.

6. A lined valve flange system as claimed in claim 5, wherein, It also includes a patch fixing assembly for limiting the patch flange on the side wall of the base flange, comprising: A positioning post is provided, which passes through the patch connection hole and the base connection hole; A positioning plate is disposed on the circumferential outer wall of the patch flange and / or the base flange; and A connector that connects the positioning post to the positioning plate.

7. A lined valve flange system as claimed in claim 6, wherein The connector is located on the side of the patch flange away from the base flange.

8. A lined valve flange system as claimed in claim 7, wherein, The connector includes: A connecting post is disposed on the upper end face of the first end of the positioning post, the connecting post extending upward and penetrating the positioning plate; and A locking nut is fitted onto the outside of the connecting post and threadedly connected to the connecting post. The locking nut is positioned above the positioning plate.

9. A lined valve flange system as claimed in claim 8, wherein, A limit plate is provided at the upper end of the connecting column.

10. A lined valve flange system as claimed in claim 6, wherein, The patch fixing assembly is provided in at least two sets.

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