Steel lining teflon mould pressing lining six-way pipe

Abstract

The utility model relates to the field of steel lining teflon pipes, and discloses a steel lining teflon mould pressing lining six-way pipe which comprises an outer-layer steel pipe, the inner side of the outer-layer steel pipe is sleeved with a lining teflon pipe, the outer-layer steel pipe comprises an outer transverse straight pipe, an outer top branch pipe and an outer bottom branch pipe, a first limiting hole is formed in the outer wall of the outer transverse straight pipe, and a second limiting hole is formed in the outer wall of the outer transverse straight pipe. A second limiting hole is formed in the outer wall of the outer top branch pipe, the lining teflon pipe comprises an inner transverse straight pipe, an inner top branch pipe and an inner bottom branch pipe, a first limiting protruding rod is fixedly arranged on the outer wall of the inner transverse straight pipe and penetrates through the first limiting hole, a second limiting protruding rod is fixedly arranged on the outer wall of the inner top branch pipe, and the second limiting protruding rod penetrates through the second limiting hole. And the second limiting convex rod penetrates through the second limiting hole. The connecting stability of the outer-layer steel pipe and the lining teflon pipe is improved through inserting connection of the limiting protruding rods and the limiting holes, the situation that the inner layer and the outer layer are separated when extruded is avoided, the limiting protruding rods can be directly manufactured through the mold pressing technology, and the machining efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of steel-lined polytetrafluoroethylene pipes, and in particular to a steel-lined polytetrafluoroethylene molded lining six-way pipe. Background Art

[0002] Steel lined PTFE pipe is a steel pipe lined with PTFE pipe inside. This composite pipe is resistant to strong acid and alkali. After years of actual use, the factors that directly affect the service life and performance stability of PTFE lined anti-corrosion pipes are temperature, pressure, medium, etc. High-quality materials and advanced manufacturing process methods are the quality guarantee of PTFE lined products. Steel lined PTFE straight pipe is commonly known as loose lining pipe. Its characteristics are as follows: high operating temperature, under the condition of strong corrosive media, it can meet the operating temperature range of -60 degrees to 200 degrees, within this temperature range it can meet all chemical media; vacuum resistance, can be used under vacuum conditions, in chemical production, often due to cooling, longitudinal discharge, pump valve asynchronous operation and other circumstances cause a local vacuum state; high pressure resistance, within the temperature range, can withstand up to 3MPA operating pressure; anti-penetration, use of high-quality polytetrafluoroethylene resin, through advanced lining technology processed into high-density, sufficient thickness of PTFE lining layer, so that the product has excellent anti-penetration; the overall molded sintering process lining solves the problem of steel and fluorine cold and hot expansion and contraction, so that it can achieve synchronous expansion and contraction; using standardized size configuration, especially the pipes used in chemical pipelines, pipe fittings have strong interchangeability, for installation, provides great convenience for spare parts. Steel-lined PTFE pipes are generally fixed and connected to other pipes through flange structures. When the extrusion pressure between the flange structures is too large during installation, the inner lining PTFE pipe is easily squeezed loose and separated from the outer steel pipe. Especially for multi-way pipes, excessive force at the connection between the pipes can easily cause dents, affecting the service life of the pipes.

[0003] For example, a Chinese utility model patent with announcement number CN219140082U discloses a steel-lined polytetrafluoroethylene tube, comprising a steel-lined outer tube and a polytetrafluoroethylene liner tube arranged inside the steel-lined outer tube, a plurality of slots are evenly provided on the inner wall of the steel-lined outer tube, a plurality of posts are evenly provided on the outer wall of the polytetrafluoroethylene liner tube, flanges are provided at both ends of the polytetrafluoroethylene liner tube, a tube-turning fixing plate is fixedly provided on the outer side of the flange, the flange is fitted with the outer side of the tube-turning fixing plate, a plurality of slots correspond to the positions of a plurality of posts, the cross-section of the posts is T-shaped, the corresponding posts are inserted into the corresponding slots, an annular gasket is provided on the outer side of the flange, a plurality of mounting holes are evenly provided on the flange and the annular gasket, a plurality of fixing holes are evenly provided on the tube-turning fixing plate, and the corresponding mounting holes are connected to the fixing holes by screws, which can improve the stability of the steel-lined polytetrafluoroethylene tube structure and avoid the inner liner tube from being separated from the outer tube, thereby affecting the normal use of the steel-lined polytetrafluoroethylene tube.

[0004] With respect to the above-mentioned related technologies, this solution is to open a hole on the outer steel pipe and connect the inner lining polyfluoro tube by screws, etc. However, the process of installing the screws is relatively cumbersome, and the screws are easily corroded when exposed to the outside, which affects the service life. Moreover, this solution is only for two-way straight pipes. For multi-way pipelines, the method of fixing with screws is more cumbersome and inconvenient to operate. Therefore, a steel-lined polyfluoro tube that is easy to use and has stable connection is needed. Utility Model Content

[0005] In order to solve the problems raised in the background technology, the present application provides a steel-lined polyfluorocarbon molded lining six-way pipe.

[0006] The present application provides a steel-lined polyfluorocarbon molded lining six-way pipe adopts the following technical solution:

[0007] A steel-lined polyfluorocarbon molded lining six-way pipe comprises an outer steel pipe, the inner side of the outer steel pipe is sleeved with an inner lining polyfluorocarbon pipe, the outer steel pipe comprises an outer horizontal straight pipe, an outer top portion pipe and an outer bottom portion pipe, the top of the outer horizontal straight pipe is connected through the outer top portion pipe, the bottom of the outer horizontal straight pipe is connected through the outer bottom portion pipe, a first limiting hole is opened on the outer wall of the outer horizontal straight pipe, a second limiting hole is opened on the outer wall of the outer top portion pipe, the outer bottom portion pipe has the same structure as the outer top portion pipe, and the inner lining polyfluorocarbon pipe comprises an inner horizontal straight pipe, an inner top portion pipe and an inner bottom portion pipe, The top of the inner horizontal straight tube is connected through an inner top portion tube, the bottom of the inner horizontal straight tube is connected through an inner bottom portion tube, the inner horizontal straight tube is embedded in the inner side of the outer horizontal straight tube, the inner top portion tube is embedded in the inner side of the outer top portion tube, the inner bottom portion tube is embedded in the inner side of the outer bottom portion tube, a first limiting convex rod is fixedly provided on the outer wall of the inner horizontal straight tube, the first limiting convex rod passes through the first limiting hole, a second limiting convex rod is fixedly provided on the outer wall of the inner top portion tube, the second limiting convex rod passes through the second limiting hole, and the inner bottom portion tube has the same structure as the inner top portion tube;

[0008] Through the above technical solution, by arranging a protruding rod on the outer wall of the inner lining polyfluoro tube and engaging with the hole opened on the outer steel tube, the inner lining polyfluoro tube and the outer steel tube are limitedly installed, the stability of the polyfluoro tube is improved when the polyfluoro tube is squeezed, and the whole does not need an external structure, and can be processed and formed during the one-piece molding operation, which is convenient to process.

[0009] Preferably, first flange plates are symmetrically fixedly provided at both ends of the outer horizontal straight tube, a first partition plate is fixedly provided on one side wall of the first flange plate, and a first fixing hole is opened on the first partition plate.

[0010] Preferably, first limiting rings are symmetrically fixed at both ends of the inner horizontal straight tube, the first limiting ring is located on one side of the first partition plate, a first connecting hole is opened on the first limiting ring, and the first connecting hole is aligned with the first fixing hole.

[0011] Preferably, a receiving groove is provided on the inner wall of the first connecting hole.

[0012] Preferably, a second flange plate is fixedly provided on the top of the outer top portion pipe, a second partition plate is fixedly provided on one side wall of the second flange plate, and a second fixing hole is opened on the second partition plate.

[0013] Preferably, a second limiting ring is fixedly provided on the top of the inner top portion pipe, the second limiting ring is located on one side of the second partition plate, a second connecting hole is opened on the second limiting ring, and the second connecting hole is aligned with the second fixing hole.

[0014] Preferably, the second connection hole has the same structure as the first connection hole.

[0015] Preferably, the first limiting holes are located on both sides of the outer top portion of the tube;

[0016] Through the above technical solution, the limiting protrusions located on both sides of the branch pipe can stabilize the connection of the branch pipe and avoid deformation of the branch pipe when it is squeezed.

[0017] In summary, this application includes the following beneficial technical effects:

[0018] 1. When the steel-lined polytetrafluoroethylene tube is made by molding technology, a limiting hole is opened on the outer steel tube, and a limiting convex rod is arranged on the outer wall of the inner polytetrafluoroethylene tube. The limiting convex rod is plugged into the limiting hole to improve the stability of the connection between the outer steel tube and the inner polytetrafluoroethylene tube, and avoid the separation of the inside and the outside when squeezed. Moreover, the limiting convex rod can be directly made by molding technology without the need for additional production, thereby improving the processing efficiency;

[0019] 2. The steel-lined polyfluorocarbon molded lined six-way pipe of this scheme includes an outer steel pipe and an inner polyfluorocarbon lined pipe. A limiting hole is opened on each branch pipe of the outer steel pipe, and the limiting hole is close to the connection between the branch pipe and the straight pipe. A limiting protrusion is set on each branch pipe of the inner polyfluorocarbon lined pipe. The engagement of the limiting protrusion and the limiting hole improves the stability of the connection between the inner and outer branch pipes at each location, avoids the deformation of the inner liner pipe after being squeezed when fixed and installed by the flange structure, and improves the stability of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the embodiment of the application;

[0021] Figure 2 is a three-dimensional schematic diagram of an outer steel pipe of an embodiment of the application;

[0022] Figure 3 2. It is a three-dimensional schematic diagram of a lined polytetrafluoroethylene tube according to an embodiment of the application;

[0023] Figure 4 is a three-dimensional cross-sectional view of an embodiment of the application;

[0024] Figure 5 It is an application example Figure 4 The enlarged schematic diagram of point A in the middle;

[0025] Figure 6 It is an application example Figure 4 A magnified schematic diagram of point B in the middle.

[0026] Explanation of the accompanying drawings: 1. Outer steel pipe; 11. Outer horizontal straight pipe; 111. First flange plate; 112. First partition plate; 113. First fixing hole; 114. First limiting hole; 12. Outer top portion of the pipe; 121. Second flange plate; 122. Second partition plate; 123. Second fixing hole; 124. Second limiting hole; 13. Inner bottom portion of the pipe; 2. Inner PTFE tube; 21. Inner horizontal straight pipe; 211. First limiting ring; 212. First connecting hole; 2121. Storage groove; 213. First limiting protrusion; 22. Inner top portion of the pipe; 221. Second limiting ring; 222. Second connecting hole; 223. Second limiting protrusion; 23. Inner bottom portion of the pipe. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1-6 This application is described in further detail.

[0028] The present application discloses a steel-lined polytetrafluoroethylene molded lining six-way pipe. Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, specifically, a steel-lined polytetrafluoroethylene molded lining six-way pipe comprises an outer steel pipe 1, and an inner lining polytetrafluoroethylene pipe 2 is sleeved on the inner side of the outer steel pipe 1. The two are made by molding technology. The principle can refer to the steel-lined polytetrafluoroethylene pipe in the prior art. The outer steel pipe 1 comprises an outer horizontal straight pipe 11, an outer top part pipe 12 and an outer bottom part pipe 13, which is the structure of a common six-way pipe. The top of the outer horizontal straight pipe 11 is connected through and connected with an outer top part pipe 12, and the bottom of the outer horizontal straight pipe 11 is connected through and connected with an outer bottom part pipe 13. The outer wall of the tube 11 is provided with a first limiting hole 114, the outer wall of the outer top portion tube 12 is provided with a second limiting hole 124, the outer bottom portion tube 13 has the same structure as the outer top portion tube 12, the inner lining polytetrafluoroethylene tube 2 comprises an inner horizontal straight tube 21, an inner top portion tube 22 and an inner bottom portion tube 23, the top of the inner horizontal straight tube 21 is connected through the inner top portion tube 22, the bottom of the inner horizontal straight tube 21 is connected through the inner bottom portion tube 23, the inner horizontal straight tube 21 is embedded in the inner side of the outer horizontal straight tube 11, and the inner top portion tube 22 is connected to the inner bottom portion tube 23. The inner bottom portion tube 23 is embedded in the inner side of the outer bottom portion tube 13, and a first limiting convex rod 213 is fixedly provided on the outer wall of the inner horizontal straight tube 21, and the first limiting convex rod 213 passes through the first limiting hole 114, and a second limiting convex rod 223 is fixedly provided on the outer wall of the inner top portion tube 22, and the second limiting convex rod 223 passes through the second limiting hole 124, and the limiting convex rod is adapted to the size of the limiting hole, and the inner bottom portion tube 23 has the same structure as the inner top portion tube 22; the first limiting hole 114 Located on both sides of the outer top branch pipe 12; in this scheme, a limiting hole is started on the outer steel pipe 1, and a limiting convex rod is arranged on the outer wall of the inner lining polyfluoro tube 2. The limiting structure of the inner lining polyfluoro tube 2 and the outer steel pipe 1 can be increased through the engagement of the convex rod with the hole, thereby improving the installation stability; and by arranging a limiting hole and a limiting convex rod on the outside of the connection position between the branch pipe and the straight pipe, the stability of the branch pipe connection is improved, thereby avoiding the deformation of the connection between the branch pipe and the straight pipe due to excessive extrusion force when the branch pipe is fixed to the external pipeline through the flange structure.

[0029] Reference Figure 4 , Figure 5 and Figure 6As shown, specifically, first flange plates 111 are symmetrically fixed at both ends of the outer horizontal straight tube 11, a first partition plate 112 is fixed on one side wall of the first flange plate 111, and a first fixing hole 113 is provided on the first partition plate 112. The specific structure and principle thereof can refer to the steel-lined polytetrafluoroethylene tube in the prior art; first limiting rings 211 are symmetrically fixed at both ends of the inner horizontal straight tube 21, the first limiting ring 211 is located on one side of the first partition plate 112, and a first connecting hole 212 is provided on the first limiting ring 211, the first connecting hole 212 is aligned with the first fixing hole 113, and the limiting ring and the partition plate can be fixed by the provided connecting hole; the top of the outer top portion pipe 12 is fixedly provided with A second flange plate 121, a second partition plate 122 is fixedly provided on one side wall of the second flange plate 121, and a second fixing hole 123 is provided on the second partition plate 122; a second limiting ring 221 is fixedly provided on the top of the inner top portion pipe 22, the second limiting ring 221 is located on one side of the second partition plate 122, and a second connecting hole 222 is provided on the second limiting ring 221, and the second connecting hole 222 is aligned with the second fixing hole 123; the second connecting hole 222 has the same structure as the first connecting hole 212; this scheme further improves the stability of the connection by providing connecting holes at both ends of the inner lining polyfluoro tube 2, and fixing its two ends to the two ends of the outer steel pipe 1 through the connecting holes.

[0030] Reference Figure 5 Specifically, a receiving groove 2121 is provided on the inner wall of the first connecting hole 212; the receiving groove 2121 is used to receive the end of the fixing screw to avoid the situation where the protruding setting of the screw affects the installation.

[0031] The implementation principle of the steel-lined polyfluorocarbon molded lined six-way pipe in the embodiment of the present application is: when the steel-lined polyfluorocarbon pipe is produced by molding technology, a limiting hole is opened on the outer steel pipe 1, and a limiting protrusion is set on the outer wall of the inner polyfluorocarbon lined pipe 2. The stability of the connection between the outer steel pipe 1 and the inner polyfluorocarbon lined pipe 2 is enhanced by the engagement of the limiting protrusion with the limiting hole. At the same time, the two ends of the inner polyfluorocarbon lined pipe 2 are fixed to the two ends of the outer steel pipe 1 through the connecting holes, so as to further improve the connection stability.

[0032] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A steel-lined polytetrafluoroethylene molded lining six-way pipe, comprising an outer steel pipe (1), characterized in that: The inner side of the outer steel tube (1) is sleeved with an inner lining polytetrafluoroethylene tube (2). The outer steel tube (1) comprises an outer horizontal straight tube (11), an outer top portion tube (12) and an outer bottom portion tube (13). The top of the outer horizontal straight tube (11) is connected to the outer top portion tube (12). The bottom of the outer horizontal straight tube (11) is connected to the outer bottom portion tube (13). The outer wall of the outer horizontal straight tube (11) is provided with a first limiting hole (114). The outer wall of the outer top portion tube (12) is provided with a second limiting hole (124). The outer bottom portion tube (13) has the same structure as the outer top portion tube (12). The inner lining polytetrafluoroethylene tube (2) comprises an inner horizontal straight tube (21), an inner top portion tube (22) and an inner bottom portion tube (23). The top of the inner horizontal straight tube (21) is connected to the outer top portion tube (12). An inner top portion tube (22) is connected, and an inner bottom portion tube (23) is connected through the bottom of the inner horizontal straight tube (21). The inner horizontal straight tube (21) is embedded in the inner side of the outer horizontal straight tube (11), the inner top portion tube (22) is embedded in the inner side of the outer top portion tube (12), and the inner bottom portion tube (23) is embedded in the inner side of the outer bottom portion tube (13). A first limiting convex rod (213) is fixedly provided on the outer wall of the inner horizontal straight tube (21), and the first limiting convex rod (213) passes through the first limiting hole (114). A second limiting convex rod (223) is fixedly provided on the outer wall of the inner top portion tube (22), and the second limiting convex rod (223) passes through the second limiting hole (124). The inner bottom portion tube (23) has the same structure as the inner top portion tube (22).

2. A steel-lined polyfluorocarbon molded lining six-way pipe according to claim 1, characterized in that: A first flange plate (111) is symmetrically fixed at both ends of the outer horizontal straight tube (11), a first partition plate (112) is fixed on one side wall of the first flange plate (111), and a first fixing hole (113) is opened on the first partition plate (112).

3. A steel-lined polyfluorocarbon molded lining six-way pipe according to claim 2, characterized in that: First limiting rings (211) are symmetrically fixed at both ends of the inner horizontal straight tube (21), the first limiting ring (211) is located on one side of the first partition plate (112), and a first connecting hole (212) is opened on the first limiting ring (211), and the first connecting hole (212) is aligned with the first fixing hole (113).

4. A steel-lined polyfluorocarbon molded lining six-way pipe according to claim 3, characterized in that: The inner wall of the first connecting hole (212) is provided with a receiving groove (2121).

5. The steel-lined polyfluorocarbon molded lining six-way pipe according to claim 4, characterized in that: A second flange plate (121) is fixedly provided on the top of the outer top portion pipe (12), a second partition plate (122) is fixedly provided on a side wall of the second flange plate (121), and a second fixing hole (123) is opened on the second partition plate (122).

6. A steel-lined polyfluorocarbon molded lining six-way pipe according to claim 5, characterized in that: A second limiting ring (221) is fixedly provided on the top of the inner top portion pipe (22); the second limiting ring (221) is located on one side of the second partition plate (122); a second connecting hole (222) is provided on the second limiting ring (221); the second connecting hole (222) is aligned with the second fixing hole (123).

7. A steel-lined polytetrafluoroethylene molded lining six-way pipe according to claim 6, characterized in that: The second connection hole (222) has the same structure as the first connection hole (212).

8. The steel-lined polyfluorocarbon molded lining six-way pipe according to claim 7, characterized in that: The first limiting holes (114) are located on both sides of the outer top portion pipe (12).

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