High-strength interlayer heat preservation steel lining polytetrafluoroethylene pipeline

Abstract

The utility model relates to the technical field of steel lining teflon pipelines, in particular to a high-strength interlayer heat preservation steel lining teflon pipeline which comprises steel pipes, one end of each steel pipe is provided with a first connecting flange through a bolt, and the first connecting flange is used for being connected with another set of steel pipes. A second connecting flange used for being connected with the other set of first connecting flanges is arranged at the end, away from the first connecting flanges, of the steel pipe, a protection mechanism used for protecting the steel pipe is arranged on the outer side of the steel pipe, and buffering mechanisms used for buffering external pressure are arranged on the inner side of the protection mechanism at equal intervals. In the using process, when the temperature of a medium in the pipeline changes, the heat preservation layer can effectively slow down the heat transfer rate, the heat preservation layer is made of the aerogel felt material, and the aerogel felt is an efficient heat preservation material, has extremely low heat conductivity and can effectively isolate heat transfer and keep the temperature of the medium in the pipeline. Heat loss is reduced, the temperature in the pipeline is kept stable, and the purpose of enhancing the heat preservation performance of the steel lining PTFE pipeline is achieved.

Description

Technical Field

[0001] This utility model relates to the field of PTFE-lined steel pipes, specifically a high-strength sandwich-insulated PTFE-lined steel pipe. Background Technology

[0002] PTFE-lined steel pipes are a high-performance pipe material that requires high corrosion resistance, thermal insulation, and strength. They also have excellent chemical stability and are widely used in fluid transportation in industries such as chemical, food, and pharmaceutical.

[0003] However, although existing PTFE-lined steel pipes have a certain degree of corrosion resistance, they still have certain defects in use. Existing PTFE-lined steel pipes are insufficient in terms of thermal insulation performance, pressure resistance, and impact resistance. The insulation effect is not good, resulting in a large energy loss when transporting high-temperature or low-temperature fluids. At the same time, the overall pressure resistance and impact resistance of the pipes are also difficult to meet the requirements of some complex working conditions. Utility Model Content

[0004] The purpose of this invention is to provide a high-strength sandwich-insulated PTFE-lined steel pipe to solve the problem of poor insulation performance and strength of existing PTFE-lined steel pipes mentioned in the background art.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] A high-strength sandwich-insulated PTFE-lined steel pipe includes a steel pipe, one end of which is bolted to a first connecting flange for connecting to another set of steel pipes, and the other end of the steel pipe away from the first connecting flange is provided with a second connecting flange for connecting to another set of first connecting flanges. A protective mechanism for protecting the steel pipe is provided on the outside of the steel pipe, and a buffer mechanism for buffering external pressure is provided at equal intervals on the inside of the protective mechanism.

[0007] Preferably, the steel pipe is made of high-strength alloy steel, and its outer surface is galvanized. The steel pipe is internally fitted with a PTFE liner made of polytetrafluoroethylene.

[0008] Preferably, an insulation layer is filled between the steel pipe and the PTFE lining through an interlayer, and the insulation layer is made of aerogel felt.

[0009] Preferably, the inner surface of the first connecting flange is fitted onto the surface of one end of the steel pipe, the outer surface of the first connecting flange is provided with a sealing groove, and a first sealing ring is fixedly connected to the side of the first connecting flange away from the sealing groove.

[0010] Preferably, the inner surface of the second connecting flange is fitted onto the surface of the steel pipe at the end away from the first connecting flange, a sealing ring is fixedly connected to the outer surface of the second connecting flange, the end of the sealing ring away from the second connecting flange is engaged and installed inside the sealing groove, and a second closing ring is fixedly connected to the end of the second connecting flange away from the sealing ring.

[0011] Preferably, the protective mechanism includes an inner protective cover fitted onto the surface of the steel pipe, an outer protective cover fitted onto the surface of the inner protective cover, and connecting sleeves fixedly connected to both ends of the inner and outer protective covers.

[0012] Preferably, the plurality of buffer mechanisms include sleeve rods fixedly installed on the surface of the inner protective cover, with abutment rods slidably inserted inside the plurality of sleeve rods, abutment springs fixedly installed inside the plurality of sleeve rods near the bottom of the plurality of abutment rods, the tops of the plurality of abutment rods extending out of the interior of the plurality of sleeve rods, and the tops of the plurality of abutment rods being fixedly connected to the inner wall of the outer protective cover.

[0013] The beneficial effects of this utility model are:

[0014] 1. This utility model achieves the purpose of enhancing the insulation performance of PTFE-lined steel pipes by effectively slowing down the heat transfer rate when the temperature of the medium inside the pipe changes during use. The insulation layer is made of aerogel felt, which is a high-efficiency insulation material with extremely low thermal conductivity. It can effectively isolate heat transfer, maintain the temperature of the medium inside the pipe, reduce heat loss, and maintain the stability of the internal temperature of the pipe.

[0015] 2. This utility model, through the setting of a first connecting flange, a second connecting flange, a sealing rubber ring, and a sealing groove, can achieve effective connection and sealing at both ends of the steel pipe, avoiding leakage during use and ensuring the stability and safety of the pipeline. At the same time, through the setting of protective and buffering mechanisms, it can buffer the collision between the outer and inner protective covers, increase the impact resistance of the PTFE-lined steel pipe, avoid damage caused by collision, and extend the service life of the pipeline. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0018] Figure 2 This is a cross-sectional structural schematic diagram of the present invention;

[0019] Figure 3 This is a schematic diagram of the protective mechanism of this utility model;

[0020] Figure 4 This is a utility model Figure 3 Enlarged structural diagram at point A in the middle.

[0021] The reference numerals in the figure are as follows: 1. Steel pipe; 101. PTFE lining; 102. Insulation layer; 2. First connecting flange; 201. Sealing groove; 202. First closing ring; 3. Second connecting flange; 301. Sealing ring; 302. Second closing ring; 4. Protective mechanism; 401. Inner protective cover; 402. Outer protective cover; 403. Connecting sleeve; 5. Buffer mechanism; 501. Sleeve rod; 502. Abutment rod; 503. Abutment spring. Detailed Implementation

[0022] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0023] like Figure 1-4 As shown, a high-strength sandwich-insulated steel-lined PTFE pipe includes a steel pipe 1, which is made of high-strength alloy steel and has a galvanized outer surface. A PTFE liner 101 is fixedly installed inside the steel pipe 1. The PTFE liner 101 is made of polytetrafluoroethylene. An insulation layer 102 is filled between the steel pipe 1 and the PTFE liner 101 through an opening. The insulation layer 102 is made of aerogel felt.

[0024] In practice, when the temperature of the medium inside the pipeline changes, the insulation layer 102 can effectively slow down the heat transfer rate. The insulation layer 102 is made of aerogel felt, which is a high-efficiency insulation material with extremely low thermal conductivity. It can effectively isolate heat transfer, maintain the temperature of the medium inside the pipeline, reduce heat loss, and maintain the stability of the temperature inside the pipeline. The steel pipe 1 and the PTFE liner 101 are an integral structure. The insulation layer 102 is filled into the steel pipe 1 and the PTFE liner 101 through an interlayer. The steel pipe 1 and the PTFE liner 101 are fixedly connected by multiple sets of fixing columns.

[0025] As a technical optimization solution of this utility model, such as Figure 1 and Figure 2As shown, one end of the steel pipe 1 is bolted to a first connecting flange 2 for connecting to another set of steel pipes 1. The inside of the first connecting flange 2 is fitted onto the surface of one end of the steel pipe 1. A sealing groove 201 is formed on the outer surface of the first connecting flange 2. A first sealing ring 202 is fixedly connected to the side of the first connecting flange 2 away from the sealing groove 201. The end of the steel pipe 1 away from the first connecting flange 2 is provided with a second connecting flange 3 for connecting to another set of first connecting flanges 2. The inside of the second connecting flange 3 is fitted onto the surface of the end of the steel pipe 1 away from the first connecting flange 2. A sealing ring 301 is fixedly connected to the outer surface of the second connecting flange 3. The end of the sealing ring 301 away from the second connecting flange 3 is engaged and installed inside the sealing groove 201. The end of the second connecting flange 3 away from the sealing ring 301 is fixedly connected to the second sealing ring 302.

[0026] In practice, when the pipeline needs to be connected to other equipment or pipelines, the first connecting flange 2 and the second connecting flange 3 can be connected by bolts. During the connection process, the sealing ring 301 is engaged inside the sealing groove 201 to ensure the sealing performance of the connection. The outer surfaces of the first sealing ring 202 and the second sealing ring 302 are threadedly connected to the threaded grooves at both ends of the steel pipe 1 through the threaded grooves, which facilitates the sealing of the interlayer between the steel pipe 1 and the PTFE liner 101, further enhancing the stability and sealing of the connection and preventing media leakage.

[0027] As a technical optimization solution of this utility model, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a protective mechanism 4 for protecting the steel pipe 1 is provided on the outside of the steel pipe 1. The protective mechanism 4 includes an inner protective cover 401 fitted on the surface of the steel pipe 1, an outer protective cover 402 fitted on the surface of the inner protective cover 401, and connecting sleeves 403 fixedly connected to both ends of the inner protective cover 401 and the outer protective cover 402. Buffering mechanisms 5 for buffering external pressure are provided at equal intervals on the inner side of the protective mechanism 4. Several sets of buffering mechanisms 5 include sleeve rods 501 fixedly installed on the surface of the inner protective cover 401. Abutment rods 502 are slidably inserted into the interior of several sets of sleeve rods 501. Abutment springs 503 are fixedly installed inside several sets of sleeve rods 501 near the bottom of several sets of abutment rods 502. The tops of several sets of abutment rods 502 extend out of the interior of several sets of sleeve rods 501. The tops of several sets of abutment rods 502 are all fixedly connected to the inner wall of the outer protective cover 402.

[0028] In practice, the abutment rod 502 slides inside the sleeve rod 501, while the abutment spring 503 undergoes elastic deformation to absorb and disperse external pressure, protecting the pipeline from damage. This allows the pipeline to maintain stable performance even in complex and variable environments. The protective mechanism 4 further enhances the pipeline's resistance to physical damage through the double protection of the outer protective cover 401 and the inner protective cover 402. The outer protective cover 401 can resist external impacts and wear, while the inner protective cover 402 provides an additional protective layer, ensuring that the pipeline can still operate normally in harsh environments.

[0029] When this utility model is in use, during the process of using the medium temperature inside the pipeline, the insulation layer 102 can effectively slow down the heat transfer rate and maintain the stability of the internal temperature of the pipeline. At the same time, the PTFE lining 101 has chemical stability and corrosion resistance, which can effectively resist the corrosive effect of the medium on the pipeline and extend the service life of the pipeline. When the pipeline needs to be connected to other equipment or pipelines, it can be connected through the first connecting flange 2 and the second connecting flange 3. During the connection process, the sealing ring 301 is engaged inside the sealing groove 201 to ensure the sealing performance of the connection. The first sealing ring 202 and the second sealing ring 302 further enhance the stability and sealing of the connection and prevent the medium from leaking.

[0030] When the pipeline is subjected to external pressure or impact, the buffer mechanism 5 plays a key role. The abutment rod 502 slides inside the sleeve rod 501, while the abutment spring 503 undergoes elastic deformation to absorb and disperse external pressure, protecting the pipeline from damage. This allows the pipeline to maintain stable performance even in complex and variable environments. The protection mechanism 4 further enhances the pipeline's resistance to physical damage through the double protection of the outer protective cover 401 and the inner protective cover 402. The outer protective cover 401 can resist external impact and wear, while the inner protective cover 402 provides an additional protective layer to ensure that the pipeline can still operate normally in harsh environments.

[0031] In addition, the pipeline has good maintainability. When it is necessary to repair or replace parts, the connecting flange, protective mechanism 4 and buffer mechanism 5 can be easily disassembled, which facilitates inspection and replacement work. This design reduces maintenance costs and improves the efficiency of pipeline use.

[0032] In summary, this high-strength, sandwich-insulated PTFE-lined steel pipe possesses excellent thermal insulation performance, corrosion resistance, resistance to physical damage, and maintainability, making it suitable for various complex and variable industrial environments. Its unique design concept and advanced manufacturing process ensure the stability and reliability of the pipeline during long-term use.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A high-strength sandwiched heat-insulating steel-lined tetrafluoro pipe comprising a steel pipe (1), characterized in that, One end of the steel pipe (1) is provided with a first connecting flange (2) for connecting another group of steel pipes (1) through bolts, and the other end of the steel pipe (1) away from the first connecting flange (2) is provided with a second connecting flange (3) for connecting another group of first connecting flanges (2), and the outer side of the steel pipe (1) is provided with a protection mechanism (4) for protecting the steel pipe (1), and the inner side of the protection mechanism (4) is provided with a buffer mechanism (5) for buffering external pressure.

2. The high strength sandwich insulated steel backed PTFE pipe according to claim 1, wherein, The steel pipe (1) is made of high-strength alloy steel material, and the outer surface is treated by galvanizing, and the steel pipe (1) is fixedly installed with a four-fluorine lining (101) in the inside, and the four-fluorine lining (101) is made of polytetrafluoroethylene material.

3. The high strength, sandwich, insulated, steel lined, Teflon lined pipe of claim 2, wherein, The steel pipe (1) and the four-fluorine lining (101) are filled with a thermal insulation layer (102) through the interlayer, and the thermal insulation layer (102) is made of aerogel felt.

4. The high strength, sandwich, insulated, steel lined, Teflon lined pipe of claim 1, wherein, The first connecting flange (2) is sleeved on the surface of one end of the steel pipe (1), the outer surface of the first connecting flange (2) is provided with a sealing groove (201), and the first connecting flange (2) is fixedly connected with a first sealing ring (202) away from the sealing groove (201).

5. The high strength, sandwich, insulated, steel lined, Teflon lined pipe of claim 1 wherein, The second connecting flange (3) is sleeved on the surface of the other end of the steel pipe (1) away from the first connecting flange (2), the outer surface of the second connecting flange (3) is fixedly connected with a sealing rubber ring (301), one end of the sealing rubber ring (301) away from the second connecting flange (3) is clamped and installed in the inside of the sealing groove (201), and the other end of the second connecting flange (3) away from the sealing rubber ring (301) is fixedly connected with a second sealing ring (302).

6. The high strength, sandwich, insulated, steel lined, Teflon lined pipe of claim 1, wherein, The protection mechanism (4) comprises an inner protection cover (401) sleeved on the surface of the steel pipe (1), and an outer protection cover (402) sleeved on the surface of the inner protection cover (401), and the two ends of the inner protection cover (401) and the outer protection cover (402) are fixedly connected with a connecting sleeve (403).

7. The high strength, sandwich, insulated, steel lined, Teflon lined pipe of claim 1 wherein, A plurality of sets of the buffer mechanism (5) comprise a sleeve rod (501) fixedly installed on the surface of the inner protection cover (401), a plurality of sets of the sleeve rod (501) are slidably inserted with a contact rod (502), a plurality of sets of the sleeve rod (501) are fixedly installed with a contact spring (503) in the inside close to the bottom end of a plurality of sets of the contact rod (502), a plurality of sets of the contact rod (502) extend out of the inside of a plurality of sets of the sleeve rod (501), and the top end of a plurality of sets of the contact rod (502) is fixedly connected with the inner wall of the outer protection cover (402).

Images