CN212745365U - Steel lining polytetrafluoroethylene silicon nitride composite pipe - Google Patents
Steel lining polytetrafluoroethylene silicon nitride composite pipe Download PDFInfo
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- CN212745365U CN212745365U CN202020944126.5U CN202020944126U CN212745365U CN 212745365 U CN212745365 U CN 212745365U CN 202020944126 U CN202020944126 U CN 202020944126U CN 212745365 U CN212745365 U CN 212745365U
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Abstract
The utility model provides a steel lining polytetrafluoroethylene silicon nitride combination pipe, by outer to interior steel pipe, polytetrafluoroethylene pipe and silicon nitride ceramic pipe of including in proper order, steel pipe, polytetrafluoroethylene pipe and silicon nitride ceramic pipe are both ends open-ended cylinder structure, the inner wall of steel pipe closely laminates with the outer wall of polytetrafluoroethylene pipe, the polytetrafluoroethylene pipe includes polytetrafluoroethylene pipe top and polytetrafluoroethylene pipe bottom, the polytetrafluoroethylene pipe top bonds through the outer wall of first adhesive layer with silicon nitride ceramic pipe, polytetrafluoroethylene pipe bottom bonds through the outer wall of second adhesive layer with silicon nitride ceramic pipe, evenly pack the silicon nitride farine in the hole between the outer wall of silicon nitride ceramic pipe and the inner wall of polytetrafluoroethylene pipe. The utility model discloses a combination pipe is applicable to the liquid medium of transmission high temperature, high-speed and strong corrosivity.
Description
Technical Field
The utility model relates to the technical field of tubular product, especially, relate to a steel lining polytetrafluoroethylene silicon nitride combination pipe.
Background
In the traditional process, corrosion-resistant materials and high-temperature-resistant materials are mostly coated on the inner side or the outer side of a steel pipe to enhance the corrosion resistance and the high temperature resistance of the steel pipe, however, after long-time use, the effect of a coating layer is poor, and the production is influenced. It is therefore necessary to provide a composite pipe having excellent corrosion resistance and high temperature resistance.
Disclosure of Invention
In view of the above, the present invention provides a steel-lined ptfe-sin composite pipe with excellent high temperature resistance and corrosion resistance.
The utility model provides a steel lining polytetrafluoroethylene silicon nitride combination pipe, by outer to interior steel pipe, polytetrafluoroethylene pipe and silicon nitride ceramic pipe of including in proper order, steel pipe, polytetrafluoroethylene pipe and silicon nitride ceramic pipe are both ends open-ended cylinder structure, the inner wall of steel pipe closely laminates with the outer wall of polytetrafluoroethylene pipe, the polytetrafluoroethylene pipe includes polytetrafluoroethylene pipe top and polytetrafluoroethylene pipe bottom, the polytetrafluoroethylene pipe top bonds through the outer wall of first adhesive layer with silicon nitride ceramic pipe, polytetrafluoroethylene pipe bottom bonds through the outer wall of second adhesive layer with silicon nitride ceramic pipe, evenly pack the silicon nitride farine in the hole between the outer wall of silicon nitride ceramic pipe and the inner wall of polytetrafluoroethylene pipe.
Furthermore, the first adhesive layer and the second adhesive layer are made of high-temperature-resistant adhesives, and the high-temperature-resistant adhesives are prepared by uniformly mixing silicon nitride fine powder and epoxy resin according to a mass ratio of 9: 20.
Further, the outer diameter of the silicon nitride ceramic tube is smaller than the inner diameter of the polytetrafluoroethylene tube by 3 mm.
Further, the polytetrafluoroethylene tube is connected with the steel tube tight lining flanging, and the axial length of the polytetrafluoroethylene tube is larger than that of the silicon nitride ceramic tube.
Furthermore, the silicon nitride ceramic tube comprises a top end of the silicon nitride ceramic tube and a bottom end of the silicon nitride ceramic tube, wherein an annular groove is formed in the top end of the silicon nitride ceramic tube, an annular protrusion matched with the annular groove is formed in the bottom end of the silicon nitride ceramic tube, the top end of the silicon nitride ceramic tube is located above the top end of the polytetrafluoroethylene tube, and the bottom end of the silicon nitride ceramic tube is located above the bottom end of the polytetrafluoroethylene tube.
Further, the steel pipe includes steel pipe top and steel pipe bottom, steel pipe top fixed connection first flange, steel pipe bottom fixed connection second flange, all set up the bolt hole on first flange and the second flange.
Furthermore, the top end of the polytetrafluoroethylene tube extends outwards to form a first flanging, the first flanging is flatly and tightly crimped on the end face of the first flange, the bottom end of the polytetrafluoroethylene tube extends outwards to form a second flanging, and the second flanging is flatly and tightly crimped on the end face of the second flange.
The utility model provides a beneficial effect that technical scheme brought is: the utility model provides a combined pipe is with silicon nitride ceramic pipe cover in the inboard of polytetrafluoroethylene pipe, closely overlaps the inboard of polytetrafluoroethylene pipe in the steel pipe simultaneously, has realized utilizing silicon nitride ceramic pipe to transmit liquid medium, because silicon nitride ceramic pipe's intensity, hardness are high, and have good high temperature resistance and corrosion resistance, therefore the utility model discloses a combined pipe is applicable to the liquid medium of transmission high temperature, high speed and strong corrosivity; the utility model provides a hole intussuseption of composite pipe between silicon nitride ceramic pipe and polytetrafluoroethylene pipe is filled with silicon nitride farine, has further improved the hardness and the intensity and the anti negative pressure of composite pipe, strengthens the mechanical stability and the scour resistance of composite pipe.
Drawings
Fig. 1 is a schematic perspective view of the steel-lined ptfe-silicon nitride composite tube of the present invention.
Fig. 2 is a schematic structural diagram of the steel-lined ptfe-silicon nitride composite tube of the present invention.
Fig. 3 is a front view of the steel-lined ptfe-silicon nitride composite tube of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be further described below with reference to the accompanying drawings.
Referring to fig. 1, 2 and 3, an embodiment of the present invention provides a steel-lined ptfe-sin composite pipe, which sequentially comprises a steel pipe 1, a ptfe pipe 2 and a sin ceramic pipe 3 from outside to inside, wherein the steel pipe 1, the ptfe pipe 2 and the sin ceramic pipe 3 are cylinder structures with openings at two ends.
The steel pipe 1 comprises a steel pipe top end 11 and a steel pipe bottom end 12, the steel pipe top end 11 is welded with a first flange 4, the steel pipe bottom end 12 is welded with a second flange 5, and preferably, the steel pipe 1 is a seamless steel pipe.
The polytetrafluoroethylene tube 2 is made of polytetrafluoroethylene, the long-term use temperature is-200-260 ℃, the chemical corrosion resistance is excellent, and the electrical insulation is not influenced by the temperature.
The polytetrafluoroethylene tube 2 comprises a polytetrafluoroethylene tube top end 21 and a polytetrafluoroethylene tube bottom end 22, the polytetrafluoroethylene tube top end 21 extends outwards to form a smooth first flanging 211, the first flanging 211 is flatly and tightly pressed on the end face of the first flange 4, the polytetrafluoroethylene tube bottom end 22 extends outwards to form a smooth second flanging 221, and the second flanging 221 is flatly and tightly pressed on the end face of the second flange 5. Preferably, the outer wall of the polytetrafluoroethylene tube 2 is closely attached to the inner wall of the steel tube 1.
The polytetrafluoroethylene tube top end 21 is located above the steel tube top end 11, and the polytetrafluoroethylene tube bottom end 22 is located below the steel tube bottom end 12.
The polytetrafluoroethylene tube 2 has an axial length greater than that of the steel tube 1.
In this embodiment, the polytetrafluoroethylene tube 2 is tightly lined with the steel tube 1 and flanged, and it is prior art to tightly line the polytetrafluoroethylene tube 2 on the inner side of the steel tube 1 in a flanging manner, which is not described in detail in this embodiment.
The silicon nitride ceramic tube 3 is made of silicon nitride, the silicon nitride material is a compound synthesized by using nitrogen and silicon under artificial conditions, has good chemical stability, high thermal stability, strong oxidation resistance, high hardness, high strength, excellent high temperature resistance and corrosion resistance, and is suitable for the working environment of high-temperature, high-speed and strong corrosive media.
Silicon nitride fine powder 6 with the average grain diameter of 10 mu m is uniformly filled in the pores between the outer wall of the silicon nitride ceramic tube 3 and the inner wall of the polytetrafluoroethylene tube 2, and the silicon nitride fine powder 6 is filled in the pores between the silicon nitride ceramic tube 3 and the polytetrafluoroethylene tube 2, so that the hardness, the strength and the negative pressure resistance of the combined tube can be further improved, and the mechanical stability and the scouring resistance of the combined tube are enhanced.
The polytetrafluoroethylene tube top end 21 is bonded with the outer wall of the silicon nitride ceramic tube 3 through the first adhesive layer 212 to realize sealing treatment, the polytetrafluoroethylene tube bottom end 22 is bonded with the outer wall of the silicon nitride ceramic tube 3 through the second adhesive layer 222 to realize sealing treatment, the first adhesive layer 212 and the second adhesive layer 222 are both formed by high-temperature-resistant adhesives, preferably, the adhesives are formed by uniformly mixing silicon nitride fine powder and epoxy resin according to the mass ratio of 9:20, and the adhesives are cured and formed at room temperature.
The outer diameter of the silicon nitride ceramic tube 3 is 3mm smaller than the inner diameter of the polytetrafluoroethylene tube 2. The polytetrafluoroethylene tube 2 has an axial length greater than that of the silicon nitride ceramic tube 3.
The silicon nitride ceramic tube 3 comprises a silicon nitride ceramic tube top end 31 and a silicon nitride ceramic tube bottom end 32, the silicon nitride ceramic tube top end 31 is located above the polytetrafluoroethylene tube top end 21, the silicon nitride ceramic tube bottom end 32 is located above the polytetrafluoroethylene tube bottom end 22, and the length of the silicon nitride ceramic tube top end 31 exceeding the polytetrafluoroethylene tube top end 21 is consistent with the length of the silicon nitride ceramic tube bottom end 32 lower than the polytetrafluoroethylene tube bottom end 22.
Referring to fig. 3, as a preferred mode of this embodiment, the top end 31 of the silicon nitride ceramic tube is provided with an annular groove 311 with a depth of 0.5mm, the bottom end 32 of the silicon nitride ceramic tube is provided with an annular protrusion with a height of 0.5mm, the annular protrusion matches with the annular groove 311 of the top end 31 of the silicon nitride ceramic tube, when two combination tubes are connected, the first flange 4 of the first combination tube can be connected with the second flange 5 of the second combination tube by a bolt in a matching manner, and simultaneously, the annular groove 311 of the top end 31 of the silicon nitride ceramic tube of the first combination tube matches with the annular protrusion of the bottom end 32 of the silicon nitride ceramic tube of the second combination tube, so that the top end 31 surface of the silicon nitride ceramic tube of the first combination tube is butted with the bottom end 32 surface of the silicon nitride ceramic tube of the second combination tube in a matching manner, in order to enhance the sealing performance, a sealing gasket is arranged at the matching connection position of the first, the sealing between the combined pipes is realized, so that the flange cannot be corroded when high-temperature and corrosion-resistant liquid flows in the combined pipes.
Utilize the utility model provides a during combination pipe transmission liquid, liquid flows in silicon nitride ceramic pipe 3, because silicon nitride ceramic pipe 3's intensity, hardness are high, and have good high temperature resistance and corrosion resistance, consequently the utility model discloses a combination pipe has high-quality properties such as heat preservation, temperature resistant, withstand voltage, corrosion-resistant, wear-resisting, is applicable to chemical production process transmission high temperature, high-speed and strong corrosive liquid medium.
The above mentioned parts are not related to the prior art.
In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.
The features of the embodiments and embodiments described herein above may be combined with each other without conflict.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (6)
1. The utility model provides a steel lining polytetrafluoroethylene silicon nitride combination tube which characterized in that, from outer to interior includes steel pipe, polytetrafluoroethylene pipe and silicon nitride ceramic tube in proper order, steel pipe, polytetrafluoroethylene pipe and silicon nitride ceramic tube are both ends open-ended cylinder structure, the inner wall of steel pipe closely laminates with the outer wall of polytetrafluoroethylene pipe, the polytetrafluoroethylene pipe includes polytetrafluoroethylene pipe top and polytetrafluoroethylene pipe bottom, polytetrafluoroethylene pipe top bonds through the outer wall of first adhesive layer with silicon nitride ceramic tube, polytetrafluoroethylene pipe bottom bonds through the outer wall of second adhesive layer with silicon nitride ceramic tube, evenly fill silicon nitride fine powder in the hole between the outer wall of silicon nitride ceramic tube and the inner wall of polytetrafluoroethylene pipe.
2. The steel lined polytetrafluoroethylene silicon nitride composite tube according to claim 1, wherein the outer diameter of said silicon nitride ceramic tube is 3mm smaller than the inner diameter of the polytetrafluoroethylene tube.
3. The steel-lined polytetrafluoroethylene silicon nitride composite pipe according to claim 1, wherein the polytetrafluoroethylene pipe is connected with a steel pipe tight-lining flanging, and the axial length of the polytetrafluoroethylene pipe is greater than that of the silicon nitride ceramic pipe.
4. The steel-lined polytetrafluoroethylene silicon nitride composite tube according to claim 1, wherein the silicon nitride ceramic tube comprises a silicon nitride ceramic tube top end and a silicon nitride ceramic tube bottom end, the silicon nitride ceramic tube top end is provided with an annular groove, and the silicon nitride ceramic tube bottom end is provided with an annular protrusion matched with the annular groove.
5. The steel-lined polytetrafluoroethylene silicon nitride composite pipe according to claim 1, wherein the steel pipe comprises a steel pipe top end and a steel pipe bottom end, the steel pipe top end is fixedly connected with a first flange, the steel pipe bottom end is fixedly connected with a second flange, and bolt holes are formed in the first flange and the second flange.
6. The steel-lined ptfe-nitride composite pipe of claim 5, wherein the ptfe tube has a top end extending outwardly to form a first flange, the first flange is in tight compression contact with an end surface of the first flange, and the ptfe tube has a bottom end extending outwardly to form a second flange, the second flange is in tight compression contact with an end surface of the second flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020944126.5U CN212745365U (en) | 2020-05-28 | 2020-05-28 | Steel lining polytetrafluoroethylene silicon nitride composite pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020944126.5U CN212745365U (en) | 2020-05-28 | 2020-05-28 | Steel lining polytetrafluoroethylene silicon nitride composite pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212745365U true CN212745365U (en) | 2021-03-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020944126.5U Active CN212745365U (en) | 2020-05-28 | 2020-05-28 | Steel lining polytetrafluoroethylene silicon nitride composite pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212745365U (en) |
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2020
- 2020-05-28 CN CN202020944126.5U patent/CN212745365U/en active Active
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