Low-temperature-resistant corrosion-resistant stainless steel seamless steel pipe for fluid conveying
By introducing ceramic inner pipe and fill layer into stainless steel seamless steel pipes, combined with sealing and joint design, the leakage problem at the connection of multi-layer casing is solved, ensuring sealing and stability during low-temperature medium transportation.
Patent Information
- Application Number
- CN202422292232.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-20
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-09-20
AI Technical Summary
In the prior art, stainless steel seamless steel pipes used to transport low-temperature medium have leakage problems at the multi-layer casing connection, making it difficult to ensure sealing.
The structural design of stainless steel seamless outer pipe, ceramic inner pipe and fill layer is adopted, and the sealing at the connection is ensured through the special structure of sealing and joints. The polyurethane insulation layer is used as the fill layer to enhance support and buffering, and the sealing is made of an integrated molding structure of engineering plastic to improve toughness.
It realizes reliable sealing at the stainless steel seamless steel pipe connections to avoid medium leakage, and enhances the service life of the pipe fittings and the stability of the connection.
Smart Images
Figure CN223137234U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a low-temperature resistant and corrosion-resistant stainless steel seamless steel pipe for fluid transportation. Background Art
[0002] In the prior art, for stainless steel seamless steel pipes used to transport low-temperature media, in order to improve their low-temperature resistance and corrosion resistance, a combination of multiple sleeves is generally used to improve their performance; however, such pipe fittings often have the following problems: the leakage problem between multiple sleeves is difficult to solve; after two pipe fittings are connected, since both pipe fittings are multiple sleeves, the sealing performance at the connection of the two pipe fittings is difficult to guarantee. Summary of the Utility Model
[0003] The purpose of the utility model is to overcome the above deficiencies of the prior art and provide a low-temperature resistant and corrosion-resistant stainless steel seamless steel pipe for fluid transportation with more reliable connection.
[0004] The technical solution of the utility model is: a low-temperature resistant and corrosion-resistant stainless steel seamless steel pipe for fluid transportation, including a first pipe body, a second pipe body and a joint. Both the first pipe body and the second pipe body include a stainless steel seamless outer pipe, a ceramic inner pipe and a filling layer arranged between the stainless steel seamless outer pipe and the ceramic inner pipe;
[0005] Both ends of the first pipe body and the second pipe body are respectively provided with an annular plug. Both ends of the stainless steel seamless outer pipe are respectively provided with a first concave ring. The outer circumference of the plug has a first convex ring corresponding to the first concave ring. The middle of the plug has a second convex ring corresponding to the filling layer. The inner circumference of the plug also has a third convex ring corresponding to the inner diameter of the ceramic inner pipe. The first convex ring is snapped into the first concave ring. The second convex ring is snapped into the end between the stainless steel seamless outer pipe and the ceramic inner pipe. The third convex ring is snapped into the inner side of the end of the ceramic inner pipe;
[0006] The end of the stainless steel seamless outer pipe has an external thread. The joint is a double-headed joint. The middle of the joint has a fourth convex ring. Both sides of the fourth convex ring are respectively provided with a second concave ring. A sealing ring is arranged in the second concave ring. The sealing ring also has an avoidance groove corresponding to the plug. The stainless steel seamless outer pipe is screwed onto the joint. The sealing ring abuts against the end of the stainless steel seamless outer pipe and the plug. The inner side of the fourth convex ring abuts against the back of the third convex ring.
[0007] Specifically, the filling layer is a polyurethane thermal insulation layer.
[0008] Specifically, the plug is an integrally formed structure of engineering plastics.
[0009] Furthermore, multiple anti-slip rings are respectively arranged on the inner circle and the outer circle of the first convex ring.
[0010] Specifically, the third convex ring is a frustum-shaped convex ring.
[0011] Furthermore, the ends of the first convex ring and the second convex ring respectively have chamfers.
[0012] The beneficial effects of the present utility model are as follows: In the present utility model, the ceramic inner tube is arranged inside the stainless steel seamless outer tube, which has the advantages of low-temperature resistance and corrosion resistance. The fourth convex ring and the sealing ring in the plugging mating joint can ensure the sealing performance at the connection between the first pipe body and the second pipe body. At the same time, it can ensure that the medium is not easily infiltrated into the filling layer between the stainless steel seamless outer tube and the ceramic inner tube. Moreover, the special structure of the joint ensures the reliability of the plugging and fixing, making it not easy to loosen at the connection with the pipe fittings. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 is a schematic structural diagram of the present utility model;
[0014] Figure 2 is Figure 1 an enlarged view of part A in
[0015] Figure 3 is a schematic structural diagram of the plugging in the present utility model;
[0016] Figure 4 is a schematic structural diagram of the joint of the present utility model.
[0017] In the figure: joint 1, stainless steel seamless outer tube 2, ceramic inner tube 3, filling layer 4, plugging 5, first convex ring 6, second convex ring 7, third convex ring 8, fourth convex ring 9, sealing ring 10. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0018] The technical solutions of the present utility model will be further specifically described below through embodiments in conjunction with the drawings.
[0019] Combined with Figures 1-4 as shown, a low-temperature resistant and corrosion-resistant stainless steel seamless steel pipe for fluid transportation includes a first pipe body, a second pipe body, and a joint 1;
[0020] Both the first pipe body and the second pipe body include a stainless steel seamless outer tube 2, a ceramic inner tube 3, and a filling layer 4 arranged between the stainless steel seamless outer tube 2 and the ceramic inner tube 3;
[0021] An annular plug 5 is provided at each end of the first pipe body and the second pipe body. A first concave ring is provided at each end of the stainless steel seamless outer pipe 2. The outer circumference of the plug 5 has a first convex ring 6 corresponding to the first concave ring. The middle of the plug 5 has a second convex ring 7 corresponding to the filling layer 4. The inner circumference of the plug 5 also has a third convex ring 8 corresponding to the inner diameter of the ceramic inner pipe 3. The first convex ring 6 is snapped into the first concave ring. The second convex ring 7 is snapped between the ends of the stainless steel seamless outer pipe 2 and the ceramic inner pipe 3. The third convex ring 8 is snapped into the inner side of the end of the ceramic inner pipe 3;
[0022] The end of the stainless steel seamless outer pipe 2 has an external thread. The joint 1 is a double-headed joint. The middle of the joint 1 has a fourth convex ring 9. Second concave rings are provided on both sides of the fourth convex ring 9. A sealing ring 10 is provided in the second concave ring. The sealing ring 10 also has an avoidance groove corresponding to the plug 5. The stainless steel seamless outer pipe 2 is screwed onto the joint 1. The sealing ring 10 abuts against the end of the stainless steel seamless outer pipe 2 and the plug 5. The inner side of the fourth convex ring 9 abuts against the back of the third convex ring 8 to improve the impact resistance of the third convex ring 8.
[0023] In the above structure, the ceramic inner pipe 3 is arranged inside the stainless steel seamless outer pipe 2, which has the advantages of low temperature resistance and corrosion resistance. The plug 5 cooperates with the fourth convex ring 9 and the sealing ring 10 in the joint 1 to ensure the sealing performance at the connection of the first pipe body and the second pipe body. At the same time, it can ensure that the medium is not easily infiltrated into the filling layer 4 between the stainless steel seamless outer pipe 2 and the ceramic inner pipe 3. The special structure of the joint 1 ensures the reliability of the fixation of the plug 5, making it not easy to loosen at the connection with the pipe fittings.
[0024] In another embodiment, the filling layer 4 is a polyurethane thermal insulation layer. The polyurethane thermal insulation layer not only plays a role in heat preservation and support, but also has a certain elasticity, which can buffer the impact of the outside world on the ceramic inner pipe 3 to improve the service life of the whole pipe fitting.
[0025] In another embodiment, the plug 5 is an integrally formed structure of engineering plastics. Engineering plastics have the advantages of low temperature resistance and corrosion resistance, and have relatively high toughness.
[0026] In another embodiment, as Figure 2 shown, multiple anti-slip rings are also respectively provided on the inner and outer circles of the first convex ring 6 to prevent the plug 5 from falling off the pipe fitting.
[0027] In another embodiment, as Figure 2 shown, the third convex ring 8 is a frustum-shaped convex ring to reduce the impact force on the third convex ring 8 when the fluid passes through.
[0028] In another embodiment, in combination with Figure 2 and Figure 3As shown, the end portions of the first convex ring 6 and the second convex ring 7 respectively have chamfers to facilitate assembly.
Claims
1. A low-temperature resistant and corrosion-resistant stainless steel seamless steel pipe for fluid transportation, comprising a first pipe body, a second pipe body and a joint (1), characterized in that, Both the first pipe body and the second pipe body include a stainless steel seamless outer pipe (2), a ceramic inner pipe (3), and a filling layer (4) disposed between the stainless steel seamless outer pipe (2) and the ceramic inner pipe (3); Both ends of the first pipe body and the second pipe body are respectively provided with an annular plug (5). Both ends of the stainless steel seamless outer pipe (2) are respectively provided with a first concave ring. The outer periphery of the plug (5) has a first convex ring (6) corresponding to the first concave ring. The middle of the plug (5) has a second convex ring (7) corresponding to the filling layer (4). The inner periphery of the plug (5) also has a third convex ring (8) corresponding to the inner diameter of the ceramic inner pipe (3). The first convex ring (6) is snapped into the first concave ring. The second convex ring (7) is snapped between the ends of the stainless steel seamless outer pipe (2) and the ceramic inner pipe (3). The third convex ring (8) is snapped into the inner side of the end of the ceramic inner pipe (3); The end of the stainless steel seamless outer pipe (2) has an external thread. The joint (1) is a double-headed joint. The middle of the joint (1) has a fourth convex ring (9). Both sides of the fourth convex ring (9) have second concave rings. A sealing ring (10) is provided in the second concave ring. The sealing ring (10) also has an avoidance groove corresponding to the plug (5). The stainless steel seamless outer pipe (2) is screwed onto the joint (1). The sealing ring (10) abuts against the end of the stainless steel seamless outer pipe (2) and the plug (5). The inner side of the fourth convex ring (9) abuts against the back surface of the third convex ring (8).
2. The cryogenic-resistant and corrosion-resistant stainless steel seamless steel pipe for fluid transportation according to claim 1, characterized in that, The filling layer (4) is a polyurethane thermal insulation layer.
3. The cryogenic and corrosion-resistant stainless steel seamless steel pipe for fluid transportation according to claim 2, characterized in that, The plug (5) is an integrally formed structure of engineering plastics.
4. A cryogenic and corrosion-resistant stainless steel seamless steel pipe for fluid transportation according to claim 3, characterized in that, Both the inner circle and the outer circle of the first convex ring (6) are respectively provided with multiple anti-slip rings.
5. A cryogenic and corrosion-resistant stainless steel seamless steel pipe for fluid transportation according to claim 4, characterized in that, The third convex ring (8) is a frustum-shaped convex ring.
6. A low-temperature resistant and corrosion-resistant stainless steel seamless steel pipe for fluid transportation according to claim 5, characterized in that, The ends of the first convex ring (6) and the second convex ring (7) respectively have chamfers.