CN217683871U - Multilayer polytetrafluoroethylene expansion joint - Google Patents
Multilayer polytetrafluoroethylene expansion joint Download PDFInfo
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- CN217683871U CN217683871U CN202222055071.4U CN202222055071U CN217683871U CN 217683871 U CN217683871 U CN 217683871U CN 202222055071 U CN202222055071 U CN 202222055071U CN 217683871 U CN217683871 U CN 217683871U
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- polytetrafluoroethylene
- hose
- expansion joint
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- flange
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Abstract
The utility model relates to a multilayer polytetrafluoroethylene expansion joint, which comprises a polytetrafluoroethylene hose, a steel ring, a self-adhesive film pressing sheet, an inner flange, a bolt fastener and an outer flange; the middle part of the polytetrafluoroethylene hose is provided with a hose protruding part, and two ends of the polytetrafluoroethylene hose are provided with hose flanging parts; the steel ring is arranged on the inner side of a hose protruding part in the polytetrafluoroethylene hose; the steel ring is fixed on the inner wall of the polytetrafluoroethylene hose by the self-adhesive film pressing sheet; inner flanges are arranged at two ends of the polytetrafluoroethylene hose; the hose flanging part is positioned between the outer flange and the inner flange and is fixed into a whole through a bolt fastener. The utility model discloses multilayer polytetrafluoroethylene expansion joint has fine joint strength, and the gas tightness is good moreover, has fine anti-gas and chemical corrosion nature, and life is longer.
Description
Technical Field
The utility model relates to a flexible connector technical field especially relates to a multilayer polytetrafluoroethylene expansion joint.
Background
The expansion joint is a flexible element that effectively compensates for axial deformation. The expansion joint of the butt joint part between the oil gas pipelines or the expansion joint on the tube plate heat exchanger shell can compensate the thermal expansion difference generated by the tubes and the shell due to different wall temperatures, and reduce the axial load of the tubes and the shell, thereby reducing the temperature difference stress of the tubes, the tube plates and the shell and avoiding causing strength damage and instability damage. The expansion joints are of various types and commonly have structures such as wave shapes, ring plate welding, clamping shells and the like. The waveform expansion joint is most widely applied, but has defects in pressure resistance, air tightness and corrosion resistance and short service life.
SUMMERY OF THE UTILITY MODEL
In order to meet the requirement, the utility model aims at providing a multilayer polytetrafluoroethylene expansion joint, the cost of manufacture is low, and convenient to use has fine joint strength, and the gas tightness is good moreover, has fine anti-gas and chemical corrosion nature, and life is longer.
The utility model discloses an adopt following technical scheme to realize:
a multilayer polytetrafluoroethylene expansion joint comprises a polytetrafluoroethylene hose, a steel ring, a self-adhesive film pressing sheet, an inner flange, a bolt fastener and an outer flange; the middle part of the polytetrafluoroethylene hose is provided with a hose protruding part, and two ends of the polytetrafluoroethylene hose are provided with hose flanging parts; the steel ring is arranged on the inner side of a hose protruding part in the polytetrafluoroethylene hose; the steel ring is fixed on the inner wall of the polytetrafluoroethylene hose by the self-adhesive film pressing sheet; inner flanges are arranged at two ends of the polytetrafluoroethylene hose; the hose flanging part is positioned between the outer flange and the inner flange and is fixed into a whole through a bolt fastener.
Furthermore, the pipe wall of the polytetrafluoroethylene hose is composed of a polytetrafluoroethylene middle layer, an outer conductive shielding film and an inner anti-corrosion fiberglass cloth; and an outer conductive shielding film and an inner anti-corrosion glass fiber cloth are respectively arranged on the upper surface and the lower surface of the polytetrafluoroethylene middle layer.
Furthermore, the pipe wall of the polytetrafluoroethylene hose is formed by thermally fusing the outer conductive shielding film, the polytetrafluoroethylene middle layer and the inner anti-corrosion fiberglass cloth into a cylinder shape.
Further, the thickness of the outer conductive shielding film is 0.8mm; the thickness of the inner layer anticorrosion glass fiber cloth is 1.25mm.
Furthermore, the hole position eccentricity corresponding to the inner flange and the outer flange is less than 1mm.
To sum up the utility model discloses following beneficial effect has: the multi-layer polytetrafluoroethylene expansion joint has good connection strength and good air tightness, when the pressure of a positive pressure compressive strength test is 3.45Kpa, the soft joint is not deformed, and the compressive strength of the soft joint accords with the pressure design strength of positive pressure 3 Kpa; when the pressure of a negative pressure compressive strength test is-8.05 Kpa, the soft joint is not deformed, the compressive strength of the soft joint meets the pressure design strength of negative pressure of-7 Kpa, and the air leakage phenomenon does not occur, so that the air tightness design requirement is met, the air-proof flexible joint has good gas and chemical corrosion resistance, and the service life is longer.
Drawings
FIG. 1 is a schematic view of a half-section structure of the present invention;
FIG. 2 is a schematic view of a layered structure of the wall of a PTFE hose;
FIG. 3 is an enlarged view of the structure at H;
wherein: a polytetrafluoroethylene hose 1; a steel ring 2; a self-adhesive film sheeting 3; an inner flange 4; a bolt fastener 5; an outer flange 6; a hose projection 11; a hose cuff 12; a polytetrafluoroethylene intermediate layer 101; an outer conductive shielding film 102; the inner layer is anti-corrosion glass fiber cloth 103.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
As shown in fig. 1 and 3, a multi-layer polytetrafluoroethylene expansion joint comprises a polytetrafluoroethylene hose 1, a steel ring 2, a self-adhesive film pressing sheet 3, an inner flange 4, a bolt fastener 5 and an outer flange 6; the middle part of the polytetrafluoroethylene hose 1 is provided with a hose protruding part 11, and two ends of the polytetrafluoroethylene hose are provided with hose flanging parts 12; the steel ring 2 is arranged on the inner side of a hose protruding part 11 in the polytetrafluoroethylene hose 1; the steel ring 2 is fixed on the inner wall of the polytetrafluoroethylene hose 1 by the self-adhesive film pressing sheet 3; inner flanges 4 are arranged at two ends of the polytetrafluoroethylene hose 1; the hose flanging part 12 is positioned between the outer flange 6 and the inner flange 4 and is fixed into a whole through the bolt fastening piece 5, and the multilayer polytetrafluoroethylene expansion joint has good connection strength.
As shown in FIG. 2, as a preferred embodiment, the wall of the polytetrafluoroethylene hose 1 is composed of a polytetrafluoroethylene middle layer 101, an outer conductive shielding film 102 and an inner anti-corrosion fiberglass cloth 103; an outer conductive shielding film 102 and an inner anti-corrosion fiberglass cloth 103 are respectively arranged on the upper surface and the lower surface of the polytetrafluoroethylene middle layer 101. This structure makes the multilayer polytetrafluoroethylene expansion joint of this application have fine gas and chemical resistance nature.
As a preferred embodiment, the tube wall of the polytetrafluoroethylene hose 1 is formed by thermally fusing the outer conductive shielding film 102, the polytetrafluoroethylene intermediate layer 101 and the inner anti-corrosion fiberglass cloth 103 into a cylindrical shape. This structure makes the gas tightness of the polytetrafluoroethylene hose of the present application very good.
As a preferred embodiment, the thickness of the outer conductive shielding film 102 is 0.8mm; the thickness of the inner layer anticorrosion glass fiber cloth 103 is 1.25mm.
As a preferred embodiment, the corresponding hole position eccentricity of the inner flange 4 and the outer flange 6 is less than 1mm, so that the production and installation are convenient.
Although specific embodiments of the present invention have been described and illustrated in detail above, it should be noted that: equivalent changes and modifications of the above embodiments, which do not depart from the spirit of the invention, are intended to be covered by the scope of the invention.
Claims (5)
1. A multilayer polytetrafluoroethylene expansion joint comprises a polytetrafluoroethylene hose, a steel ring, a self-adhesive film pressing sheet, an inner flange, a bolt fastener and an outer flange; the method is characterized in that: the middle part of the polytetrafluoroethylene hose is provided with a hose protruding part, and two ends of the polytetrafluoroethylene hose are provided with hose flanging parts; the steel ring is arranged on the inner side of a hose protruding part in the polytetrafluoroethylene hose; the steel ring is fixed on the inner wall of the polytetrafluoroethylene hose by the self-adhesive film pressing sheet; inner flanges are arranged at two ends of the polytetrafluoroethylene hose; the hose flanging part is positioned between the outer flange and the inner flange and is fixed into a whole through a bolt fastener.
2. The multilayer polytetrafluoroethylene expansion joint according to claim 1, wherein: the pipe wall of the polytetrafluoroethylene hose is composed of a polytetrafluoroethylene middle layer, an outer conductive shielding film and an inner anti-corrosion fiberglass cloth; and an outer conductive shielding film and an inner anti-corrosion glass fiber cloth are respectively arranged on the upper surface and the lower surface of the polytetrafluoroethylene middle layer.
3. A multilayer polytetrafluoroethylene expansion joint according to claim 2, wherein: the tube wall of the polytetrafluoroethylene hose is formed by thermally fusing an outer conductive shielding film, a polytetrafluoroethylene middle layer and an inner anti-corrosion fiberglass cloth into a cylinder shape.
4. A multilayer polytetrafluoroethylene expansion joint according to claim 2, wherein: the thickness of the outer conductive shielding film is 0.8mm; the thickness of the inner layer anti-corrosion glass fiber cloth is 1.25mm.
5. The multilayer polytetrafluoroethylene expansion joint according to claim 1, wherein: the hole position eccentricity corresponding to the inner flange and the outer flange is less than 1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222055071.4U CN217683871U (en) | 2022-08-05 | 2022-08-05 | Multilayer polytetrafluoroethylene expansion joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222055071.4U CN217683871U (en) | 2022-08-05 | 2022-08-05 | Multilayer polytetrafluoroethylene expansion joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217683871U true CN217683871U (en) | 2022-10-28 |
Family
ID=83725084
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222055071.4U Active CN217683871U (en) | 2022-08-05 | 2022-08-05 | Multilayer polytetrafluoroethylene expansion joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217683871U (en) |
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2022
- 2022-08-05 CN CN202222055071.4U patent/CN217683871U/en active Active
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