Teflon lining anti-corrosion pipe fitting

Abstract

The utility model relates to a Teflon lining anti-corrosion pipe fitting, and belongs to the technical field of pipeline corrosion prevention, the Teflon lining anti-corrosion pipe fitting comprises a drainage pipe, the left side and the right side of the drainage pipe are each provided with a connecting flange for prolonging the service life of the drainage pipe and improving the connecting stability of the drainage pipe, and four locking grooves are formed in the drainage pipe. According to the Teflon lining anti-corrosion pipe fitting, the stainless steel layer can provide good supporting performance for the whole pipeline, the Teflon layer fixed to the inner side can remarkably improve the corrosion resistance of the pipeline, good high-temperature resistance is achieved, and finally, the connecting effect is guaranteed through the connecting flange, and meanwhile the service life of the pipeline is prolonged. The thermal expansion and cold contraction effect of the drainage pipe can be matched in a slight telescopic mode, the overall high-temperature-resistant effect of the pipe fitting is further improved, the upper limit of the applicable temperature interval is greatly improved, the requirement for alternate conveying of cold and hot materials on the same pipeline can be met, the industrial production flexibility is widened, and the production cost is reduced. And moreover, the daily maintenance frequency and cost are reduced, and the increase of economic benefits is indirectly promoted.

Description

Technical Field

[0001] This utility model relates to the field of pipeline corrosion protection technology, specifically a Teflon-lined anti-corrosion pipe fitting. Background Technology

[0002] Currently, in the fields of chemical, petroleum, and pharmaceutical industries, traditional metal pipelines are prone to corrosion during long-term use due to the strong corrosiveness of the transported media, leading to frequent leakage accidents. In order to improve the corrosion resistance of pipeline systems, anti-corrosion layers are usually installed inside the metal pipelines. Common anti-corrosion layer materials include epoxy resin coatings and rubber linings. Although these materials can resist corrosion to a certain extent, they still have problems with poor durability and stability under high temperature and high pressure environments. With the development of the times, many different anti-corrosion pipe fittings have also emerged.

[0003] For example, Chinese Patent (Announcement No.: CN220470903U) discloses an easy-to-assemble anti-corrosion pipe fitting, including a first pipe body, a through hole on the outer wall of the first pipe body, a screw connected to the inner wall of the through hole, a fixing strip installed on the inner wall of the first pipe body, a rotating shaft installed on the outer wall of the fixing strip, a rotating plate installed on the outer wall of the rotating shaft, a locking block installed on the outer wall of the rotating plate, a second pipe body connected to the outer wall of the first pipe body, a locking groove on the inner wall of the second pipe body, and a spring installed on the outer wall of the second pipe body. This utility model fixes the first and second pipe bodies by rotating the rotating plate located on the outer wall of the rotating shaft, causing the locking block located on the outer wall of the rotating plate to lock into the locking groove located on the inner wall of the second pipe body, then inserting the screw into the through hole located on the outer wall of the first pipe body, and screwing the nut into the outer wall of the screw for fixation.

[0004] However, this pipe fitting has poor heat resistance. When encountering a large temperature range or alternating hot and cold transmission, the pipe connection may crack due to the expansion or contraction of the pipe fitting, which may further lead to the leakage of corrosive solutions. Therefore, a Teflon-lined anti-corrosion pipe fitting is proposed to solve the above problems. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a Teflon-lined anti-corrosion pipe fitting that has the advantage of good heat resistance, thus solving the problem of insufficient heat resistance in pipelines.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a Teflon-lined anti-corrosion pipe fitting, including a drain pipe, wherein both the left and right sides of the drain pipe are provided with connecting flanges to improve the service life and connection stability of the drain pipe, and four locking grooves are provided on the drain pipe;

[0007] The drain pipe includes a stainless steel layer and a Teflon layer, and the Teflon layer is fixed to the inner side of the stainless steel layer.

[0008] Each of the connecting flanges includes two connecting blocks, four locking parts, and a buffer part. The drain pipe is snapped into the connecting blocks. Each connecting block is provided with two locking parts, and a buffer part is provided between two connecting blocks.

[0009] By adopting this technical solution, and through the combination of Teflon layer and connecting flange, the corrosion resistance and heat resistance of pipe fittings can be significantly improved.

[0010] Furthermore, each connecting block is annular, each connecting block has a snap-fit ​​groove, and each connecting block has two spring grooves, each spring groove being connected to the snap-fit ​​groove.

[0011] By adopting this technical solution, setting the connecting block as a ring can better adapt to the shape of the drain pipe, further improving the overall sealing effect of the pipe fitting.

[0012] Furthermore, each of the locking parts includes a plurality of locking springs and a locking block, wherein the plurality of locking springs are fixed to the inner wall of the spring groove, and the ends of the plurality of locking springs away from the spring groove are fixed to the locking block.

[0013] By adopting this technical solution, the locking part can ensure the connection stability between the drain pipe and the connecting flange, while facilitating the disassembly and assembly of the drain pipe.

[0014] Furthermore, each of the locking blocks is adapted to the locking slot, and the left and right sides of each locking block are sloped.

[0015] By adopting this technical solution, the ramp shape can transform the horizontal force into the vertical force, further enabling the drainage pipe to be smoothly engaged with the connecting flange under the action of huge external force and locking block.

[0016] Furthermore, each of the connecting blocks is fixed with two limiting blocks, and each limiting block is located at the connection between the spring groove and the snap-fit ​​groove.

[0017] By adopting this technical solution, the limiting block can limit the locking block, preventing the locking block from completely separating from the connecting block, and further improving the stability of the locking block.

[0018] Furthermore, each of the buffer parts includes an inner ring, an outer ring, a buffer spring, and a snap-fit ​​block. The inner ring and the outer ring abut against the inner and outer rings of the connecting block, respectively. Each connecting block has a limiting hole, and the connecting block is movably connected to the snap-fit ​​block through the limiting hole. The left and right sides of the buffer spring are fixed to the connecting block, and the inner side of the buffer spring is movably connected to the snap-fit ​​block.

[0019] By adopting this technical solution, the inner and outer rings can play a sealing role, thereby effectively preventing the leakage of liquid inside the pipeline and further improving the overall stability of the pipeline.

[0020] Furthermore, each of the inner and outer rings includes a protective plate and a buffer block, with the outer side of the protective plate of the inner ring fixed to the buffer block, and the inner side of the protective plate of the outer ring fixed to the buffer block.

[0021] By adopting this technical solution, the connection between the two connecting blocks can be completely filled by the cooperation of the protective plate and the buffer block, and sufficient protection can be provided to the connection between the two connecting blocks, thereby improving the service life of the pipe fitting.

[0022] Furthermore, each of the buffer blocks includes a support layer and two silicone layers, with the left and right sides of the support layer fixed to the silicone layers.

[0023] By adopting this technical solution, the silicone layer has good heat resistance and can fill the joint between the two connecting blocks through deformation under stress, further improving the sealing performance of the pipe fitting.

[0024] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0025] This Teflon-lined corrosion-resistant pipe fitting features a stainless steel layer that provides excellent support for the entire pipeline, while the fixed Teflon layer significantly improves the pipeline's corrosion resistance and high-temperature resistance. Finally, the connecting flange ensures a secure connection while allowing for slight expansion and contraction to accommodate the thermal expansion and contraction of the drain pipe, further enhancing the fitting's overall high-temperature resistance. This significantly increases the upper limit of the applicable temperature range, enabling the alternating transfer of hot and cold materials on the same pipeline. This broadens the flexibility of industrial production, reduces the frequency and cost of routine maintenance, helps companies minimize downtime losses, and indirectly promotes economic growth. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of this utility model;

[0027] Figure 2 This is a schematic diagram of the structure of the drainage pipe of this utility model;

[0028] Figure 3 This is a three-dimensional view of the connecting flange of this utility model.

[0029] In the diagram: 1. Drain pipe; 101. Stainless steel layer; 102. Teflon layer; 2. Connecting flange; 201. Connecting block; 202. Locking part; 2021. Locking spring; 2022. Locking block; 203. Buffer part; 2031. Outer ring; 2032. Inner ring; 2033. Buffer spring; 2034. Snap-fit ​​block. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Please see Figures 1 to 2 In this embodiment, a Teflon-lined anti-corrosion pipe fitting includes a drain pipe 1. Both sides of the drain pipe 1 are provided with connecting flanges 2 to improve the service life and connection stability of the drain pipe 1. Four locking grooves are provided on the drain pipe 1. The locking grooves can cooperate with the locking blocks 2022 to improve the stability between the drain pipe 1 and the connecting flanges 2.

[0032] In addition, the drain pipe 1 includes a stainless steel layer 101 and a Teflon layer 102. The stainless steel layer 101 ensures sufficient strength while also being economical. The Teflon layer 102 is fixed to the inner side of the stainless steel layer 101. The Teflon layer 102 is made of imported high-quality polytetrafluoroethylene (PTFE) particles, ensuring excellent chemical stability and mechanical properties. The Teflon layer 102 is tightly attached to the inner wall of the stainless steel layer 101 and is firmly attached to its surface by hot-pressing embedding. Specifically, the pre-treated PTFE particles are first heated to a certain temperature to soften them, and then they are evenly extruded into the cleaned inner cavity of the steel pipe by a press. After cooling and solidification, a dense and seamless Teflon layer 102 is formed.

[0033] It should be noted that the inner and outer surfaces of the stainless steel layer 101 are cleaned to remove oil and dust. The hot pressing parameters are set, and the temperature and pressure values ​​are adjusted according to the actual situation. The preheated PTFE granules are put in, the equipment is started for pressing, the molding process is monitored to ensure uniform thickness distribution, and the material is naturally cooled and shaped to complete the assembly operation.

[0034] Please refer to it again. Figure 1 and Figure 3To improve the heat resistance of the pipeline, each connecting flange 2 in this embodiment includes two connecting blocks 201, four locking parts 202 and a buffer part 203. The drain pipe 1 is snapped into the connecting blocks 201. Each connecting block 201 is provided with two locking parts 202. A buffer part 203 is provided between the two connecting blocks 201. The buffer part 203 can expand and contract, providing sufficient space for the thermal deformation of the drain pipe 1, and further improving the overall heat resistance of the pipe fitting.

[0035] It is known that each connecting block 201 is annular, and this shape can better fit the shape of the drain pipe 1, further improving the sealing performance of the drain pipe 1. Each connecting block 201 has a snap-fit ​​groove and two spring grooves. Each spring groove is connected to the snap-fit ​​groove. Each connecting block 201 has two limiting blocks fixed on it, and each limiting block is located at the connection between the spring groove and the snap-fit ​​groove.

[0036] It should be further explained that each locking part 202 includes multiple locking springs 2021 and locking blocks 2022. The multiple locking springs 2021 are fixed to the inner wall of the spring groove. The multiple locking springs 2021 can provide greater elastic force to further ensure connection stability. When the locking block 2022 meets the locking groove, it can quickly engage. The end of the multiple locking springs 2021 away from the spring groove is fixed to the locking block 2022.

[0037] Furthermore, each locking block 2022 is adapted to the locking groove, and the left and right sides of each locking block 2022 are sloped. The slope can cause the horizontal force to change into the vertical force, thereby realizing quick assembly and disassembly.

[0038] In addition, each buffer section 203 includes an inner ring 2032, an outer ring 2031, a buffer spring 2033, and a locking block 2034. Limiting plates are fixed to both the left and right sides of the locking block 2034, and the limiting plates are adapted to the limiting holes. The limiting plates can limit the locking block 2034, further ensuring a stable connection of the locking block 2034 and preventing the locking block 2034 from separating from the connecting block 201. The inner ring 2032 and the outer ring 2031 are respectively connected to the inner ring of the connecting block 201. Each connecting block 201 has a limiting hole that abuts against the outer ring. The connecting block 201 is movably connected to the snap-fit ​​block 2034 through the limiting hole. The left and right sides of the buffer spring 2033 are fixed to the connecting block 201, and the inner side of the buffer spring 2033 is movably connected to the snap-fit ​​block 2034. The movable connection between the buffer spring 2033 and the snap-fit ​​block 2034 can ensure that the buffer spring 2033 and the snap-fit ​​block 2034 operate stably and can save space.

[0039] It is known that each inner ring 2032 and outer ring 2031 includes a protective plate and a buffer block. The outer side of the protective plate of the inner ring 2032 is fixed to the buffer block, and the inner side of the protective plate of the outer ring 2031 is fixed to the buffer block. The two protective plates can provide good protection for the connection between the two connecting blocks 201. The buffer block and the two connecting blocks 201 are interference fit. Each buffer block includes a support layer and two silicone layers. The left and right sides of the support layer are fixed to the silicone layers. The silicone layers have good heat resistance and can fill the two connecting blocks 201 well to ensure internal sealing.

[0040] In this embodiment, the locking spring 2021 and the locking block 2022 work together to achieve quick assembly and disassembly, and the locking block 2022 can transmit force, causing the buffer spring 2033 to deform into the connecting block 201 to provide good deformation space.

[0041] Understandably, more demanding application scenarios may be encountered in actual use. Therefore, an additional layer of metal mesh support frame can be added as a reinforcement method. This can not only enhance the overall rigidity of the entire component, but also prevent local deformation that may occur during long-term service. In addition, in some particularly important parts, such as elbows, a thicker Teflon 102 layer can be selected to strengthen the protection.

[0042] All electrical components mentioned in this article are electrically connected to the controller and power supply. The control method of this utility model is controlled by the controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the art. Furthermore, this utility model is mainly used to protect mechanical devices, so the control method and circuit connection will not be explained in detail.

[0043] The working principle of the above embodiments is as follows:

[0044] In use, first, fit the connecting flanges 2 onto both sides of the drain pipe 1, and then use a hydraulic press to push the connecting flanges 2 towards the end closest to the drain pipe 1 until the locking block 2022 is engaged in the locking groove. This completes the pipe splicing. When fluid passes through the drain pipe 1 with the Teflon layer 102, the Teflon layer 102 itself has excellent acid and alkali resistance and a low coefficient of friction, thus effectively preventing the medium from corroding and damaging the pipe. Furthermore, because the Teflon layer 102 has a wide temperature range (-269°C to +250°C), it can withstand even extremely harsh operating environments. It can maintain good physical properties without deformation or aging. When it encounters liquid with large temperature changes, the stainless steel layer 101 will expand and contract with temperature. At this time, the force of slight deformation of the stainless steel layer 101 will be transmitted to the connecting block 201 through the locking block 2022. At this time, the buffer spring 2033 on the buffer part 203 will be compressed or stretched by the force. When the pipe temperature returns to normal, the drain pipe 1 returns to its original length. The force of the return will also be transmitted to the connecting block 201 through the locking block 2022. At the same time, the elastic potential energy is released by the buffer spring 2033, causing the two connecting blocks 201 to return to their original shape.

[0045] This pipe fitting significantly improves the corrosion resistance of piping systems, especially when facing strong acids, strong alkalis, and other organic solvents. It also greatly increases the upper limit of the applicable temperature range, enabling the alternating transfer of hot and cold materials on the same pipeline. This broadens the flexibility of industrial production, reduces the frequency and cost of routine maintenance, helps companies reduce downtime losses, and indirectly promotes economic growth.

Claims

1. A Teflon-lined corrosion-resistant pipe fitting, comprising a drain pipe (1), characterized in that: The drain pipe (1) is provided with connecting flanges (2) on both the left and right sides to improve the service life and connection stability of the drain pipe (1), and four locking grooves are provided on the drain pipe (1). The drain pipe (1) includes a stainless steel layer (101) and a Teflon layer (102), and the Teflon layer (102) is fixed on the inner side of the stainless steel layer (101). Each of the connecting flanges (2) includes two connecting blocks (201), four locking parts (202) and a buffer part (203). The drain pipe (1) is engaged with the connecting blocks (201). Each of the connecting blocks (201) is provided with two locking parts (202), and a buffer part (203) is provided between the two connecting blocks (201).

2. The Teflon-lined anti-corrosion pipe fitting according to claim 1, characterized in that: Each connecting block (201) is annular, and each connecting block (201) has a snap-fit ​​groove. Each connecting block (201) has two spring grooves, and each spring groove is connected to the snap-fit ​​groove.

3. The Teflon-lined anti-corrosion pipe fitting according to claim 2, characterized in that: Each of the locking parts (202) includes a plurality of locking springs (2021) and a locking block (2022). The plurality of locking springs (2021) are fixed to the inner wall of the spring groove, and the end of the plurality of locking springs (2021) away from the spring groove is fixed to the locking block (2022).

4. A Teflon-lined anti-corrosion pipe fitting according to claim 3, characterized in that: Each of the locking blocks (2022) is adapted to the locking slot, and the left and right sides of each of the locking blocks (2022) are sloped.

5. A Teflon-lined anti-corrosion pipe fitting according to claim 2, characterized in that: Each of the connecting blocks (201) has two fixed limiting blocks, and each of the limiting blocks is located at the connection between the spring groove and the snap-fit ​​groove.

6. A Teflon-lined anti-corrosion pipe fitting according to claim 1, characterized in that: Each of the buffer parts (203) includes an inner ring (2032), an outer ring (2031), a buffer spring (2033), and a snap-fit ​​block (2034). The inner ring (2032) and the outer ring (2031) abut against the inner and outer rings of the connecting block (201), respectively. Each of the connecting blocks (201) has a limiting hole. The connecting block (201) is movably connected to the snap-fit ​​block (2034) through the limiting hole. The left and right sides of the buffer spring (2033) are fixed to the connecting block (201), and the inner side of the buffer spring (2033) is movably connected to the snap-fit ​​block (2034).

7. A Teflon-lined anti-corrosion pipe fitting according to claim 6, characterized in that: Each of the inner ring (2032) and outer ring (2031) includes a protective plate and a buffer block, with the outer side of the protective plate of the inner ring (2032) fixed to the buffer block and the inner side of the protective plate of the outer ring (2031) fixed to the buffer block.

8. A Teflon-lined anti-corrosion pipe fitting according to claim 7, characterized in that: Each of the buffer blocks includes a support layer and two silicone layers, with the left and right sides of the support layer fixed to the silicone layers.

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