Lining stainless steel pipe fitting

Abstract

The utility model relates to the technical field of pipelines, and discloses a lining stainless steel pipe fitting which comprises an outer pipe, an inner pipe is arranged in the outer pipe, a positioning assembly is arranged between the outer pipe and the inner pipe and comprises a plurality of guide grooves, the bottoms of the guide grooves are fixedly connected to the inner wall of the outer pipe, and the inner pipe is fixedly connected to the inner wall of the outer pipe. The outer wall of the inner pipe is fixedly connected with a plurality of guide plates, the positions of the guide plates are aligned with the positions of the guide grooves, a plurality of positioning holes are formed in the guide plates and the guide grooves, threaded grooves are formed in the inner wall of the outer pipe and the outer wall of the inner pipe, and sealing assemblies are arranged on the left side and the right side of the outer pipe. According to the utility model, the guide plate is aligned with the guide groove and slides in, then the sealing ring is fixed on the two sides of the outer pipe and the inner pipe, and finally the filling material is injected into the gap between the outer pipe and the inner pipe through high pressure to cover the threaded groove and the positioning hole, so that the effects of heat insulation and shock absorption are achieved, the problem of layering caused by infirm combination of the traditional pipe fitting is solved, and the durability of the product is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to pipeline technical field especially relates to a kind of inner lining stainless steel pipe fittings. BACKGROUND

[0002] In industrial production, building facilities and daily life's water supply and drainage, gas supply and other systems, pipeline system is an indispensable key part, among them, inner lining stainless steel pipe fittings as an important pipeline component, in recent years, it is concerned, with the continuous improvement of the performance requirements of pipeline in various industries, ordinary pipe fittings have been difficult to meet the needs of complex working conditions, inner lining stainless steel pipe fittings, with its good corrosion resistance, hygiene and other material's high strength and other characteristics, become the ideal choice of optimizing pipeline system performance, and have wide application prospect in many fields.

[0003] Traditional pipe fittings are commonly used in single material solid pipe fittings, which rely on the integrity of the material to ensure strength and sealing, and the connection method mainly includes traditional welding, which melts and fuses the metal at the pipe interface through high temperature to form a continuous connection body, and threaded connection, which uses the threads processed on the pipe fittings and pipe to realize connection by rotating and tightening. In terms of medium transportation, the smooth inner wall of the pipe fittings is mainly relied on to reduce fluid resistance. However, these traditional structures and technologies have many shortcomings when facing increasingly complex use environments.

[0004] One of the biggest problems of traditional pipe fittings is that they are not firmly combined and are prone to delamination. In long-term use, the bonding force between different material parts of the pipe fittings gradually decreases due to the temperature changes, pressure fluctuations and corrosion of the transported medium. For example, when transporting corrosive liquids in chemical pipelines or when facing frequent temperature changes in heating pipelines, separation phenomenon easily occurs between the inner and outer layers of materials, which not only greatly shortens the service life of the pipe fittings, leading to frequent replacement and high maintenance costs, but also causes medium leakage, seriously affecting the transportation efficiency. Therefore, an inner lining stainless steel pipe fitting is proposed to solve the above problems. UTILITY MODEL CONTENTS

[0005] In order to make up for the above shortcomings, the utility model provides an inner lining stainless steel pipe fitting, which aims to improve the delamination problem of pipe fittings caused by poor combination in the prior art.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] An inner lining stainless steel pipe fitting, comprising an outer pipe, an inner pipe arranged inside the outer pipe, a positioning assembly arranged between the outer pipe and the inner pipe, the positioning assembly being used for positioning when the outer pipe and the inner pipe are installed.

[0008] The positioning assembly comprises a plurality of guide grooves which are circumferentially distributed inside the outer tube, the bottom of the guide groove is fixedly connected to the inner wall of the outer tube, a plurality of guide plates are fixedly connected to the outer wall of the inner tube, the guide plates are circumferentially distributed on the outer wall of the inner tube, the positions of the guide plates are aligned with the positions of the guide grooves, a plurality of positioning holes are formed in the guide plates and the guide grooves, the positioning holes are arrayed, threaded grooves are formed in the inner wall of the outer tube and the outer wall of the inner tube, the threaded grooves are used to increase the contact area between the inner wall of the outer tube and the outer wall of the inner tube and the filler, and the left and right sides of the outer tube are provided with sealing assemblies which are used to seal the gap between the outer tube and the inner tube.

[0009] Further description of the above technical scheme:

[0010] The sealing assembly comprises a plurality of sealing rings which are located on the left and right sides of the outer tube and the inner tube, a plurality of injection holes are formed in the side wall of the sealing ring, and the injection holes are circumferentially distributed inside the sealing ring.

[0011] Further description of the above technical scheme:

[0012] The outer wall of the outer tube is provided with flanges which are symmetrically distributed on the two sides of the outer wall of the outer tube, and the inner wall of the flange is fixedly connected to the outer wall of the outer tube.

[0013] Further description of the above technical scheme:

[0014] A plurality of locking outer columns are fixedly connected to the inside of the flange, the locking outer columns are circumferentially distributed in the inside of the flange, a plurality of limiting balls are slidingly connected to the inside of the locking outer column, and the limiting balls are circumferentially distributed at the bottom of the inside of the locking outer column.

[0015] Further description of the above technical scheme:

[0016] The inner wall of the locking outer column is slidingly connected with a locking inner column, and the inner wall of the locking outer column is fixedly connected with a limiting plate.

[0017] Further description of the above technical scheme:

[0018] A limiting groove is formed in the bottom of the outer wall of the locking inner column, and a rotating block is fixedly connected to the top of the locking inner column.

[0019] Further description of the above technical scheme:

[0020] The outer wall of the locking inner column is fixedly connected with a limiting column, and the outer wall of the limiting column is slidingly connected to the inside of the locking outer column.

[0021] Further description of the above technical scheme:

[0022] A reset spring is provided at the bottom of the limiting post. One end of the reset spring is fixedly connected to the bottom of the limiting post, and the other end of the reset spring is fixedly connected to the inner wall of the locking outer post.

[0023] This utility model has the following beneficial effects:

[0024] 1. In this utility model, the worker first slides the guide plate on the outer wall of the inner tube into the guide groove on the inner wall of the outer tube. Then, the worker uses an electric welding tool to weld and fix the sealing ring on both sides of the outer tube and the inner tube. Finally, the worker fills the gap between the outer tube and the inner tube with polytetrafluoroethylene material through the injection hole by high pressure injection, thereby covering the threaded groove and the positioning hole, enhancing the bonding strength, and achieving heat insulation and shock absorption effects. This solves the problem of delamination caused by weak bonding in traditional pipe fittings, and improves the durability and conveying efficiency of the product.

[0025] 2. In this utility model, the operator first aligns the flange with the pipeline to be connected, inserts the bottom of the locking outer column into the corresponding hole, manually presses the rotating block, which drives the locking inner column and the limiting groove to move down, squeezing out the limiting ball so that it is restricted in the hole. The limiting column also moves down, passes through the limiting plate, and then the rotating block is rotated so that the protruding block of the limiting column is stuck at the bottom of the limiting plate. The reset spring is compressed, achieving the effect of quickly connecting the fittings and the pipeline, solving the problem of cumbersome fitting connection, and improving installation efficiency. Attached Figure Description

[0026] Figure 1 This is a perspective view of a stainless steel-lined pipe fitting proposed in this utility model.

[0027] Figure 2 An exploded view of the inner tube structure of a stainless steel-lined pipe fitting proposed in this utility model.

[0028] Figure 3 A schematic diagram of a locking outer column structure for a stainless steel-lined pipe fitting proposed in this utility model;

[0029] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0030] Legend:

[0031] 1. Outer tube; 2. Inner tube; 3. Flange; 4. Sealing ring; 5. Injection hole; 6. Guide plate; 7. Positioning hole; 8. Threaded groove; 9. Guide groove; 10. Locking outer column; 11. Limiting ball; 12. Locking inner column; 13. Limiting groove; 14. Rotating block; 15. Limiting plate; 16. Limiting post; 17. Return spring. Detailed Implementation

[0032] 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.

[0033] Reference Figure 1 and Figure 2 The present invention provides an embodiment of a stainless steel-lined pipe fitting, comprising an outer pipe 1, which is typically made of ordinary carbon steel. Carbon steel has high strength and good processing performance, and can provide a stable external support structure for the entire pipe fitting. An inner pipe 2 is provided inside the outer pipe 1. The inner pipe 2 is made of stainless steel. Stainless steel has excellent corrosion resistance and high temperature resistance, and can effectively resist the erosion of the conveying medium, ensuring a stable conveying environment inside the pipe fitting. A positioning component is provided between the outer pipe 1 and the inner pipe 2. The positioning component is used for positioning when installing the outer pipe 1 and the inner pipe 2.

[0034] The positioning assembly includes multiple guide grooves 9, which are made of the same material as the outer tube 1. The guide grooves 9 provide guidance for the installation of the inner tube 2, ensuring that the inner tube 2 can be smoothly inserted into the outer tube 1. The guide grooves 9 are circumferentially distributed inside the outer tube 1, and their bottoms are fixedly connected to the inner wall of the outer tube 1. Multiple guide plates 6 are fixedly connected to the outer wall of the inner tube 2. The guide plates 6 are made of the same material as the inner tube 2 and cooperate with the guide grooves 9 to slide along the trajectory of the guide grooves 9 during the insertion of the inner tube 2 into the outer tube 1, achieving accurate positioning of the inner tube 2. The guide plates 6 are circumferentially distributed on the outer wall of the inner tube 2, and their positions are aligned with the guide grooves 9. Multiple positioning holes 7 are provided inside both the guide plates 6 and the guide grooves 9. By injecting filler material, the relative positions of the outer tube 1 and the inner tube 2 are further fixed, improving the installation accuracy and stability. The positioning holes 7 are arranged in an array. Threaded grooves 8 are provided on the inner wall of the outer tube 1 and the outer wall of the inner tube 2. The threaded grooves 8 are formed by machining and are made of the same material as the outer tube 1 and the inner tube 2. The threaded groove 8 is used to increase the contact area between the inner wall of the outer tube 1 and the outer wall of the inner tube 2 and the filler, so that the filler can better adhere between the outer tube 1 and the inner tube 2. The left and right sides of the outer tube 1 are provided with sealing components. The sealing components are used to seal the gap between the outer tube 1 and the inner tube 2 to prevent the filler from leaking and to ensure the internal sealing of the pipe fitting. The sealing components include multiple sealing rings 4. The sealing rings 4 are generally made of stainless steel and have good corrosion resistance and welding performance. The sealing rings 4 are located on the left and right sides of the outer tube 1 and the inner tube 2. Multiple injection holes 5 are opened on the side wall of the sealing rings 4. The function of the injection holes 5 is to serve as the injection channel for the filler during the filling process, so that the filler can enter the gap between the outer tube 1 and the inner tube 2 evenly. The injection holes 5 are distributed in a circular shape inside the sealing rings 4. The outer wall of the outer tube 1 is provided with flanges 3. The function of the flanges 3 is to facilitate the connection of the pipe fitting with other pipes or equipment. The flanges 3 are distributed symmetrically on both sides of the outer wall of the outer tube 1. The inner wall of the flanges 3 is fixedly connected to the outer wall of the outer tube 1.

[0035] Specifically, in manufacturing this stainless steel lined pipe fitting, the workers first accurately align the guide plate 6 on the outer wall of the inner pipe 2 with the guide groove 9 on the inner wall of the outer pipe 1. Then, along the direction of the guide groove 9, the inner pipe 2 is slid into the outer pipe 1. Subsequently, the workers place the sealing ring 4 on the left and right sides of the outer pipe 1 and the inner pipe 2, and use welding tools to weld the side wall of the sealing ring 4 to the ends of the outer pipe 1 and the inner pipe 2. After the sealing ring 4 is installed and welded, the relative position of the inner pipe 2 and the outer pipe 1 is further fixed due to the restraining effect of the sealing ring 4. At this time, the positioning holes 7 of the guide plate 6 and the guide groove 9 are accurately aligned. Then, the workers put the high-temperature and corrosion-resistant polytetrafluoroethylene (PTFE) material into the high-pressure injection equipment. Under high pressure, the PTFE material passes through the injection hole 5 at high speed, allowing the PTFE material to... The PTFE material is evenly filled into the gap between the outer tube 1 and the inner tube 2. During the filling process, the PTFE material first contacts the threaded grooves 8 on the inner wall of the outer tube 1 and the outer wall of the inner tube 2. Due to the presence of the threaded grooves 8, the contact area is increased, and the PTFE material can adhere better to them. As the filling continues, the PTFE material gradually fills into the positioning hole 7, ensuring that the positioning hole 7 is also completely covered. After continuous high-pressure injection, the PTFE material finally completely covers the threaded grooves 8 on the inner wall of the outer tube 1 and the outer wall of the inner tube 2, as well as the positioning hole 7, filling the gap between the outer tube 1 and the inner tube 2, making them a whole. At the same time, the PTFE material itself has good heat insulation and shock absorption properties, which can play a role in heat insulation and shock absorption, improving the comprehensive performance of the stainless steel lined pipe fittings and meeting the usage requirements in different environments.

[0036] Reference Figure 3 and Figure 4Multiple locking outer posts 10 are fixedly connected inside the flange 3. Locking inner posts 12 are made of alloy steel, possessing high strength and toughness, capable of withstanding significant pressure and tension. The locking outer posts 10 are circumferentially distributed inside the flange 3. Multiple limiting balls 11 are slidably connected inside each locking outer post 10, circumferentially distributed at the bottom of the locking outer post 10. Locking inner posts 12 are slidably connected to the inner walls of each locking outer post 10. Limiting plates 15, made of carbon steel, are fixedly connected to the inner walls of the locking outer posts 10 to limit the displacement range of the locking inner posts 12. Limiting grooves 13 are formed at the bottom of the outer walls of each locking inner post 12. The function of the limiting grooves 13 is to accommodate and release the limiting balls 11 during the displacement of the locking inner post 12, thereby controlling the movement of the limiting balls 11. The control system completes the connection and locking operation. The top of each locking inner column 12 is fixedly connected to a rotating block 14 for manual control of the rotation and displacement of the locking inner column 12. The outer wall of each locking inner column 12 is fixedly connected to a limiting column 16, which cooperates with the limiting plate 15 during the displacement and rotation of the locking inner column 12 to further limit and lock the locking inner column 12. The outer wall of the limiting column 16 is slidably connected to the inside of the locking outer column 10. The bottom of the limiting column 16 is provided with a return spring 17, which provides an upward elastic force to the limiting column 16 after the connection is completed to ensure the reliability of the lock. At the same time, it assists the locking inner column 12 to reset when unlocking. One end of the return spring 17 is fixedly connected to the bottom of the limiting column 16, and the other end of the return spring 17 is fixedly connected to the inner wall of the locking outer column 10.

[0037] Specifically, during the actual installation of this stainless steel lined pipe fitting, the operator first places the stainless steel lined pipe fitting with flange 3 next to the pipeline to be connected, and aligns the locking outer post 10 on flange 3 with the corresponding hole in the pipeline. After alignment, the operator inserts the bottom of the locking outer post 10 into the corresponding hole, thus initially positioning the pipe fitting and the pipeline. At this time, the operator presses the rotating block 14, which causes the locking inner post 12 to move downward, further causing the limiting groove 13 at its bottom to move downward as well. Before the limiting groove 13 moves downward, the limiting ball 11 is located on the inner wall of the limiting groove 13. When the limiting groove 13 moves downward, the limiting ball 11 is gradually squeezed out of the limiting groove 13. After being squeezed out, the side wall of the limiting ball 11 is squeezed by the outer wall of the locking inner post 12. Since the locking outer post 10 is inserted into the hole in the pipeline, the limiting ball 11 is restricted within the hole in the pipeline, thus achieving the initial locking between the pipe fitting and the pipeline. During the downward displacement, the limiting post 16 on its outer wall also moves downward. After the limiting post 16 moves downward and passes through the limiting plate 15, the operator rotates the rotating block 14. The rotation of the rotating block 14 causes the limiting post 16 to rotate as well. During the rotation of the limiting post 16, the protruding block on its outer wall gradually rotates to the bottom of the limiting plate 15. During the rotation of the limiting post 16, the return spring 17 at the bottom of the limiting post 16 is compressed, undergoes elastic deformation, and stores elastic potential energy. Due to the limiting... The column 16 is stuck by the limiting plate 15, and the return spring 17 cannot rebound, so the limiting plate 15 is pushed against the bottom of the limiting column 16, thus completing the connection between the pipes. When it is necessary to disassemble the pipe, the operator rotates the rotating block 14 in the opposite direction, so that the protrusion of the limiting column 16 leaves the bottom of the limiting plate 15. Under the elastic force of the return spring 17, the limiting column 16 and the locking inner column 12 are displaced upward, and the limiting ball 11 returns to the limiting groove 13. The operator can then pull the pipe out of the pipe.

[0038] Working principle: In manufacturing this stainless steel lined pipe fitting, the worker first aligns multiple guide plates 6 on the outer wall of the inner pipe 2 with the corresponding guide grooves 9 on the inner wall of the outer pipe 1 and slides them in. Then, the two sealing rings 4 are installed on the left and right sides of the outer pipe 1 and inner pipe 2, and welded together using welding tools. Under the constraint of the sealing rings 4, the positioning holes 7 of the guide plates 6 and guide grooves 9 are aligned. Then, high-pressure injection is used to fill the gap between the outer pipe 1 and inner pipe 2 through the injection hole 5 with high-temperature resistant and corrosion-resistant polytetrafluoroethylene (PTFE) material, ensuring complete coverage of the threaded grooves 8 on the inner wall of the outer pipe 1 and the outer wall of the inner pipe 2, as well as the positioning holes 7. This enhances the bonding strength and provides heat insulation and vibration damping. In actual use and installation of this stainless steel lined pipe fitting, the worker first aligns the flange 3 with the flange to be connected... The pipe is inserted into the corresponding hole by inserting the bottom of the locking outer post 10. At this time, the operator manually presses down the rotating block 14, which causes the locking inner post 12 to move downward. The displacement of the rotating block 14 causes the limiting groove 13 at its bottom to move downward as well. The displacement of the limiting groove 13 causes the limiting ball 11, which was originally located on its inner wall, to be squeezed out. The side wall is restricted within the hole of the pipe by the pressure of the outer wall of the locking inner post 12. The displacement of the locking inner post 12 also causes the limiting post 16 to move downward. After the limiting post 16 passes through the limiting plate 15, the operator rotates the rotating block 14 to make the limiting post 16 rotate, so that the protrusion on its outer wall is stuck at the bottom of the limiting plate 15. At this time, the return spring 17 is compressed and cannot rebound, thus completing the connection between the pipes and achieving the effect of quickly connecting the fittings with other pipes.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., 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 stainless steel-lined pipe fitting, comprising an outer pipe (1), characterized in that: The outer tube (1) is provided with an inner tube (2), and a positioning component is provided between the outer tube (1) and the inner tube (2). The positioning component is used for positioning when installing the outer tube (1) and the inner tube (2). The positioning component includes multiple guide grooves (9), which are distributed circumferentially inside the outer tube (1). The bottom of the guide grooves (9) is fixedly connected to the inner wall of the outer tube (1). Multiple guide plates (6) are fixedly connected to the outer wall of the inner tube (2). The guide plates (6) are distributed circumferentially on the outer wall of the inner tube (2). The position of the guide plates (6) is aligned with the position of the guide grooves (9). Multiple positioning holes (7) are provided inside the guide plates (6) and the guide grooves (9). The positioning holes (7) are distributed in an array. Threaded grooves (8) are provided on the inner wall of the outer tube (1) and the outer wall of the inner tube (2). The threaded grooves (8) are used to increase the contact area between the inner wall of the outer tube (1) and the outer wall of the inner tube (2) and the filler. Sealing components are provided on both the left and right sides of the outer tube (1). The sealing components are used to seal the gap between the outer tube (1) and the inner tube (2).

2. The stainless steel-lined pipe fitting according to claim 1, characterized in that: The sealing assembly includes multiple sealing rings (4), which are located on the left and right sides of the outer tube (1) and the inner tube (2). Multiple injection holes (5) are provided on the sidewalls of the sealing rings (4), which are distributed in a circular shape inside the sealing rings (4).

3. A stainless steel-lined pipe fitting according to claim 2, characterized in that: The outer wall of the outer tube (1) is provided with a flange (3), which is symmetrically distributed on both sides of the outer wall of the outer tube (1). The inner wall of the flange (3) is fixedly connected to the outer wall of the outer tube (1).

4. A stainless steel-lined pipe fitting according to claim 3, characterized in that: Multiple locking outer posts (10) are fixedly connected inside the flange (3). The locking outer posts (10) are distributed in a circumferential shape inside the flange (3). Multiple limiting balls (11) are slidably connected inside the locking outer posts (10). The limiting balls (11) are distributed in a circumferential shape at the bottom inside the locking outer posts (10).

5. A stainless steel-lined pipe fitting according to claim 4, characterized in that: The inner walls of the locking outer column (10) are all slidably connected to the locking inner column (12), and the inner walls of the locking outer column (10) are fixedly connected to the limiting plate (15).

6. A stainless steel-lined pipe fitting according to claim 5, characterized in that: Limiting grooves (13) are provided at the bottom of the outer wall of each locking inner column (12), and rotating blocks (14) are fixedly connected to the top of each locking inner column (12).

7. A stainless steel-lined pipe fitting according to claim 6, characterized in that: The outer walls of the locking inner column (12) are all fixedly connected to limit columns (16), and the outer walls of the limit columns (16) are slidably connected inside the locking outer column (10).

8. A stainless steel-lined pipe fitting according to claim 7, characterized in that: A reset spring (17) is provided at the bottom of the limiting post (16). One end of the reset spring (17) is fixedly connected to the bottom of the limiting post (16), and the other end of the reset spring (17) is fixedly connected to the inner wall of the locking outer post (10).

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