Steel lining polytetrafluoroethylene insert tube structure
By using a combination structure of steel-lined PTFE insert tubes, the problem of easy cracking of the weld between the PTFE tube and the PTFE plate at high temperatures is solved, realizing an integrated steel-plastic connection and ensuring safe operation of the equipment.
Patent Information
- Application Number
- CN202520906189.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-09
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-05-09
AI Technical Summary
When the operating temperature of the equipment exceeds 100°C, the weld between the PTFE tube and the PTFE plate of the existing steel-lined PTFE insertion tube is prone to cracking, which can lead to media leakage and corrosion of steel components, posing a safety hazard.
The system adopts a combination structure of a first pipe fitting, a liner, and a second pipe fitting. The liner is placed inside the first pipe fitting, with flanges at both ends for sealing with flanges. The second pipe fitting is inserted into the liner and fits against the first flange to ensure a tight connection. The inner diameter of the liner is slightly larger than the outer diameter of the second pipe fitting, thus achieving steel-plastic integration.
It effectively solves the problem of cracking of the weld between PTFE tube and PTFE plate at high temperature, ensuring safe operation of equipment and avoiding media leakage and corrosion.
Smart Images
Figure CN223953510U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to steel lining tetrafluoro insert pipe technical field, mainly relates to a kind of guarantee tetrafluoro lining and steel ring realizes integrality technical field. BACKGROUND
[0002] Steel lining tetrafluoro insert pipe is a kind of main accessory in anticorrosive equipment commonly used in tower section, reaction kettle and other fields;Steel lining tetrafluoro insert pipe is a composite pipe fitting, which is made of metal shell (usually carbon steel or stainless steel) lined with polytetrafluoroethylene (PTFE, commonly known as tetrafluoro) material, and has mechanical strength of metal and chemical inertness of PTFE. Generally, plate lining process is used to make the corresponding specification tetrafluoro tube into the steel part, the sealing surface of the small end is flanged, and the sealing surface of the large end is pasted with tetrafluoro plate on the sealing surface of the steel part with glue, and then the tetrafluoro tube and the tetrafluoro plate are welded together at the connection between the tetrafluoro tube and the tetrafluoro plate with PFA welding rod.
[0003] However, the inventors of the present application found that when the equipment operating temperature exceeds 100℃, the tetrafluoro tube and the tetrafluoro plate weld seam position will crack due to thermal expansion and contraction, causing medium leakage or corrosion of the steel part, thereby causing safety hazards. UTILITY MODEL CONTENT
[0004] The utility model aims at solving some problems existing in the prior art. Therefore, the purpose of the utility model is to provide a steel lining tetrafluoro insert pipe structure to ensure the safety of product use.
[0005] To achieve the above-mentioned purpose, the utility model realizes the following technical scheme:
[0006] A steel lining tetrafluoro insert pipe structure, comprising a first pipe fitting, a lining part and a second pipe fitting, the lining part is arranged in the first pipe fitting and tightly adheres to the inner wall of the first pipe fitting, the second pipe fitting is arranged in the lining part, the first pipe fitting is provided with a first flange on one end of the outer wall and a second flange on the other end of the outer wall, the first flange is consistent with the specification of the feed pipe, and the second flange is consistent with the specification of the flange of the equipment feed port.
[0007] Further to the above-mentioned scheme, the lining part is provided with flanges at both ends, which are respectively first flange and second flange, the first flange is adhered to the sealing surface of the first flange, and the second flange is adhered to the sealing surface of the second flange.
[0008] Further to the above-mentioned scheme, the second pipe fitting is provided with a third flange at one end, and the third flange is adhered to the first flange.
[0009] Further to the above-mentioned scheme, the inner diameter of the lining part is 0.01mm-0.05mm larger than the outer diameter of the second pipe fitting.
[0010] On the basis of the above scheme, the diameter of the third flange is less than or equal to the diameter of the first flange.
[0011] On the basis of the above scheme, the second pipe is inserted into the lining and one end is fitted out of the lining.
[0012] Compared with the prior art, the utility model has the beneficial effects that:
[0013] The steel lining four-fluorine insertion pipe structure realizes steel-plastic integration, effectively solves the problem that the four-fluorine pipe and four-fluorine plate weld joint are prone to cracking when the equipment operating temperature exceeds 100 DEG C.
[0014] The features and advantages of the utility model will be described in detail in combination with the drawings. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 It is a sectional view of a steel lining four-fluorine insertion pipe structure.
[0016] Reference signs:
[0017] 1. first pipe, 2. lining, 3. second pipe, 4. first flange, 5. second flange, 6. first flange, 7. second flange, 8. third flange. DETAILED DESCRIPTION
[0018] In order to make the technical means, creative features, purposes and effects of the utility model easy to understand, the utility model will be further described below in combination with specific embodiments.
[0019] The exemplary embodiments will be described in detail hereinbelow with reference to the drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of apparatus consistent with some aspects of the present application as detailed in the appended claims.
[0020] The terminology used in the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The present application will be described with reference to the accompanying drawings and / or claims and with reference being made to terminology used in the present application. Unless otherwise defined, the terminology used in the present application is not intended to be limiting of the present application. The use of the same reference symbols in different drawings and / or the use of similar terminology between different embodiments does not necessarily indicate that the same element is meant unless otherwise understood from the context. The use of the terms "a" and "an" and "the" and "at least one" are intended to include both singular and plural, unless otherwise indicated. The use of the term "and / or" includes all possible combinations of one or more of the associated listed items. The use of the terms "first", "second", "third", etc. are intended to denote different instances of the same item, unless otherwise indicated. The use of the term "about" in relation to a numerical value refers to a value that is within 10% of the value, preferably within 5% of the value, more preferably within 1% of the value, and most preferably within 0.1% of the value.
[0021] Reference should be made to Figure 1 A steel lining Teflon insert pipe structure, comprising a first pipe 1, a lining 2 and a second pipe 3, the lining 2 is arranged in the first pipe 1 and tightly adheres to the inner wall of the first pipe 1, the second pipe 3 is arranged in the lining 2, wherein the first pipe 1 is a steel pipe, and the caliber of the first pipe 1 is slightly larger than that of the feed pipe, the lining 2 is a Teflon lining, and the second pipe 3 is a Teflon pipe; a first flange 4 is arranged on one end of the outer wall of the first pipe 1, and a second flange 5 is arranged on the other end of the outer wall of the first pipe 1, the first flange 4 and the second flange 5 are both welded on the first pipe 1, the first flange 4 is consistent with the specification of the feed pipe, and the second flange 5 is consistent with the specification of the feed port flange of the equipment, so as to facilitate the connection with the feed port of the equipment.
[0022] Specifically, the lining 2 is provided with a flange at both ends, which are respectively a first flange 6 and a second flange 7, the first flange 6 is in close contact with the sealing surface of the first flange 4, and the second flange 7 is in close contact with the sealing surface of the second flange 5.
[0023] Specifically, one end of the second pipe 3 is provided with a third flange 8, and the third flange 8 is in close contact with the first flange 6.
[0024] In the present embodiment, the lining 2 is lined on the inner wall of the first pipe 1 and the sealing surfaces of the first flange 4 and the second flange 5 by a molding or isobaric process.
[0025] Specifically, the inner diameter of the lining 2 is 0.01mm-0.05mm larger than the outer diameter of the second pipe 3.
[0026] In particular, the third flange 8 has a diameter less than or equal to the diameter of the first flange 6.
[0027] In particular, the second tube 3 is inserted into the spacer 2 at an end opposite the third flange 8 and protrudes from the spacer 2 at that end.
[0028] The basic principle and main features of the present application and the advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.
Claims
1. A steel lined Teflon insert tube structure characterized by, The utility model relates to a pipe fitting, which comprises a first pipe fitting, a lining and a second pipe fitting, the lining is arranged in the first pipe fitting and closely adheres to the inner wall of the first pipe fitting, the second pipe fitting is arranged in the lining, a first flange is arranged on the outer wall of one end of the first pipe fitting, a second flange is arranged on the outer wall of the other end of the first pipe fitting, the first flange is consistent with the specification of a feed pipe, and the second flange is consistent with the specification of a flange of a feed inlet of equipment.
2. The steel lined PTFE insert tube structure according to claim 1, wherein, The lining is provided with flanges at both ends, which are respectively a first flange and a second flange, the first flange is in close contact with the sealing surface of the first flange, and the second flange is in close contact with the sealing surface of the second flange.
3. The steel lined PTFE insert tube structure according to claim 2, wherein, One end of the second pipe fitting is provided with a third flange, and the third flange is in close contact with the first flange.
4. The steel lined PTFE insert tube structure according to any one of claims 1 to 3, wherein The inner diameter of the lining is 0.01mm-0.05mm larger than the outer diameter of the second pipe fitting.
5. The steel lined PTFE insert tube structure according to claim 3, wherein, The diameter of the third flange is less than or equal to the diameter of the first flange.
6. The steel lined PTFE insert tube structure according to any one of claims 1-3, wherein The second pipe fitting is inserted into the lining and one end of the second pipe fitting is arranged to pass through the lining.