Anti-twist steel-plastic pipe fitting

Abstract

The utility model discloses a kind of anti-twist steel plastic pipe fittings, including steel pipe body, plastic pipe assembly is adhered to steel pipe body inner wall, rear end assembly inner thread adapter sleeve with limiting protrusion, front end assembly outer thread adapter pipe head with polygonal outer frame, anticorrosive coating is sprayed to outside and is equipped with anti-twist component;Anti-twist component contains inner wall with the limiting sleeve of adaptive groove, the planar bottom frame with fixed through-hole and the rubber ring of inner wall slotting.It has beneficial effects: steel pipe body guarantees structural strength, plastic pipe assembly and anticorrosive coating realize double anticorrosion;The protrusion of inner thread adapter sleeve and outer thread adapter pipe head is aligned to realize accurate splicing, and plastic pipe assembly and inner thread adapter sleeve end surface flush improve sealing property;Limiting sleeve is limited by groove to rotate, rubber ring enhances skid resistance, planar bottom frame is conveniently fixed and guarantee that multiple pipe fittings are installed neat, overall anti-twist effect is prominent, installation is convenient, applicable to building water supply and drainage, chemical medium conveying and the like scene.

Description

Technical Field

[0001] This utility model relates to the field of pipeline engineering, and in particular to an anti-torsion steel-plastic pipe fitting. Background Technology

[0002] In the field of fluid transportation, steel-plastic composite pipe fittings are widely used in building water supply and drainage, chemical media transportation and other scenarios because they combine the high strength of metal materials with the corrosion resistance of plastic materials.

[0003] In existing technologies, steel-plastic pipe fittings mostly rely on threaded structures for splicing. Under long-term exposure to fluid impact, vibration, or temperature changes, relative torsion can easily occur at the threaded connections, leading to loosening of the joints. This not only affects conveying efficiency but may also cause media leakage, posing a significant safety hazard, especially when conveying corrosive or high-pressure media. Although some pipe fittings have attempted to improve this by increasing thread length or using anti-slip washers, the torsion problem has not been fundamentally solved from a structural design perspective, resulting in limited anti-loosening effects.

[0004] When splicing pipe fittings, the lack of a clear positioning structure can easily lead to thread misalignment, resulting in poor sealing at the joint. Furthermore, the plastic inner layer of some fittings may not align with the end face of the connecting sleeve, easily creating gaps after splicing and causing media leakage, increasing subsequent maintenance costs. In addition, the existing installation and fixing methods for pipe fittings are relatively simple, often relying on a single bracket. When multiple fittings are installed side-by-side, it is difficult to ensure overall neatness, and adjacent fittings are prone to relative rotation due to external forces, further exacerbating the risk of loosening at the joint.

[0005] Therefore, a torsion-resistant steel-plastic pipe fitting is proposed. Utility Model Content

[0006] The purpose of this utility model is to solve the above problems and propose an anti-torsion steel-plastic pipe fitting.

[0007] To achieve the above objectives, this utility model provides the following technical solution: an anti-torsion steel-plastic pipe fitting, comprising a steel pipe body, a plastic pipe assembly bonded and fixed to the inner wall of the steel pipe body, an internally threaded connecting sleeve assembled at the rear end of the steel pipe body, an externally threaded connecting pipe head assembled at the front end of the steel pipe body, an anti-corrosion coating sprayed on the outer side of the steel pipe body, and an anti-torsion assembly sleeved on the outer side of the steel pipe body through the anti-corrosion coating.

[0008] Preferably, the rear end of the plastic tube assembly is inserted into the interior of the internally threaded connecting sleeve, and the rear end of the plastic tube assembly is aligned with the rear end of the internally threaded connecting sleeve.

[0009] Preferably, the outer side of the internal threaded connecting sleeve is provided with a plurality of limiting protrusions, and the inner side of the internal threaded connecting sleeve is provided with a threaded groove.

[0010] Preferably, the rear end of the external threaded connector is a polygonal outer frame, the protrusion of which is aligned with the limiting protrusion of the internal threaded connector sleeve, and the outer front end of the external threaded connector is provided with a threaded protrusion.

[0011] Preferably, the anti-torsion assembly includes a limiting sleeve fitted over the steel pipe body with an anti-corrosion coating, a flat bottom frame welded to the outside of the limiting sleeve, and a rubber ring bonded and fixed inside the limiting sleeve and located at the rear end of the limiting sleeve.

[0012] Preferably, the inner wall of the limiting sleeve is provided with a groove, which matches the internal thread connecting sleeve and the external thread connecting pipe head; a circular through hole is provided on the flat bottom frame near its four corners.

[0013] Preferably, the inner wall of the rubber ring is provided with multiple grooves evenly spaced.

[0014] The beneficial effects of this utility model are as follows: By designing this steel-plastic pipe fitting, the following beneficial effects are achieved: Stable structure and strong support: The steel pipe body serves as the core framework, ensuring the overall structural strength of the pipe fittings. It can withstand external pressure and impact during splicing and use, while providing a stable installation foundation for each component to ensure reliable assembly.

[0015] Excellent corrosion resistance and long service life: The inner wall plastic pipe assembly isolates the conveying medium from contact with the inner wall of the steel pipe, avoiding internal corrosion; the outer anti-corrosion coating isolates external harmful substances, preventing oxidation and chemical corrosion of the outer wall of the steel pipe, providing double protection and extending the service life of the pipe fittings.

[0016] Precise and airtight splicing: The rear end of the plastic pipe assembly is aligned with the rear end of the internal threaded connecting sleeve to ensure the sealing of the splice and prevent media leakage; the limiting protrusion of the internal threaded connecting sleeve is aligned with the multi-angle outer frame protrusion of the external threaded connecting pipe head to achieve splicing positioning and ensure precise connection.

[0017] Outstanding anti-torsion performance: The limiting sleeve of the anti-torsion component cooperates with the internal thread connecting sleeve and the external thread connecting pipe head through the groove, restricting the relative rotation of the two and preventing loosening after splicing; the rubber ring enhances the anti-slip property of the limiting sleeve and prevents it from sliding; the flat bottom frame fixes the pipe and restricts the rotation of adjacent pipes, further enhancing the anti-torsion effect.

[0018] Easy and stable installation: The round through holes at the four corners of the flat bottom frame make it easy to fix the pipe fittings to the mounting surface with bolts, improving the stability of the installation; when multiple pipe fittings are installed side by side, the flat bottom frame fits together to keep the whole neat and stable, making operation convenient. Attached Figure Description

[0019] Appendix Figure 1 This is a schematic diagram of the overall structure of this utility model; Appendix Figure 2This is a schematic diagram of the steel pipe body, plastic pipe assembly, internal threaded connecting sleeve, external threaded connecting pipe head and anti-corrosion coating of this utility model; Appendix Figure 3 This is an exploded view of the anti-torsion component of this utility model.

[0020] Legend: 1. Steel pipe body; 2. Plastic pipe assembly; 3. Internal threaded connecting sleeve; 4. External threaded connecting pipe head; 5. Anti-corrosion coating; 6. Anti-torsion assembly; 601. Limiting sleeve; 602. Flat bottom frame; 603. Rubber ring. Detailed Implementation

[0021] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] See Figure 1-3 As shown in the figure, an anti-torsion steel-plastic pipe fitting in this embodiment includes a steel pipe body 1, a plastic pipe assembly 2 bonded and fixed to the inner wall of the steel pipe body 1, an internal threaded connecting sleeve 3 assembled at the rear end of the steel pipe body 1, an external threaded connecting pipe head 4 assembled at the front end of the steel pipe body 1, an anti-corrosion coating 5 sprayed on the outer side of the steel pipe body 1, and an anti-torsion assembly 6 sleeved on the outer side of the steel pipe body 1 through the anti-corrosion coating 5.

[0023] The rear end of the plastic tube assembly 2 is inserted into the interior of the internal threaded connecting sleeve 3, and the rear end of the plastic tube assembly 2 is aligned with the rear end of the internal threaded connecting sleeve 3.

[0024] The outer side of the internal threaded connecting sleeve 3 is provided with multiple limiting protrusions, and the inner side of the internal threaded connecting sleeve 3 is provided with a threaded groove.

[0025] The rear end of the external threaded connector 4 is a polygonal outer frame, the protrusion of which is aligned with the limiting protrusion of the internal threaded connector 3, and the outer front end of the external threaded connector 4 is provided with a threaded protrusion.

[0026] Specifically, the steel pipe body 1 serves as the core support structure of the entire steel-plastic pipe fitting, providing a stable skeleton for the pipe fitting, bearing the external pressure and impact during pipe splicing and use, ensuring the overall structural strength of the pipe fitting, and providing an installation foundation for the plastic pipe assembly 2, internal threaded connecting sleeve 3, external threaded connecting pipe head 4, anti-corrosion coating 5 and anti-torsion assembly 6, ensuring that each component can be stably assembled in its corresponding position.

[0027] The plastic pipe assembly 2 is bonded and fixed to the inner wall of the steel pipe body 1. On the one hand, it can isolate the steel pipe body 1 from direct contact with the medium being transported inside the pipe, avoid corrosion of the inner wall of the steel pipe body 1 by the medium, and extend the service life of the steel pipe body 1. On the other hand, its smooth inner wall can reduce the resistance during the transport of the medium inside the pipe and improve the transport efficiency of the medium. Furthermore, the rear end of the plastic pipe assembly 2 is inserted into the internal threaded connecting sleeve 3 and aligned with the rear end of the internal threaded connecting sleeve 3, which can ensure the sealing of the pipe joint and prevent the medium from leaking from the joint gap.

[0028] The internal threaded connecting sleeve 3 is assembled at the rear end of the steel pipe body 1. The threaded groove on its inner side provides a threaded mating basis for spiral splicing with the external threaded connecting pipe head 4 of another steel-plastic pipe fitting, ensuring that the two pipe fittings can be stably connected. The multiple limiting protrusions evenly arranged on the outer side can be aligned with the protrusions of the multi-angled outer frame at the rear end of the external threaded connecting pipe head 4 when the pipe fittings are spliced, playing a positioning role and ensuring accurate splicing position.

[0029] The external threaded connector 4 is assembled at the front end of the steel pipe body 1. The threaded protrusion at the front end of the outer side can be spirally engaged with the threaded groove of the internal threaded connector sleeve 3 of another steel-plastic pipe fitting to realize the splicing connection of the two steel-plastic pipe fittings. The multi-angled outer frame protrusion at the rear end can be aligned with the limiting protrusion of the internal threaded connector sleeve 3 during splicing to assist in completing the splicing positioning and ensure accurate splicing.

[0030] The anti-corrosion coating 5 is sprayed on the outside of the steel pipe body 1, which can effectively isolate the steel pipe body 1 from contact with harmful substances such as moisture, oxygen, and corrosive gases in the external environment, prevent oxidation corrosion or other chemical corrosion on the outside of the steel pipe body 1, protect the structural integrity of the steel pipe body 1, and extend the service life of the entire pipe fitting.

[0031] The anti-torsion component 6 is installed on the outside of the steel pipe body 1 through the anti-corrosion coating 5, and is a key component of the anti-torsion function of the pipe fitting.

[0032] See appendix Figure 1-3 As shown, the anti-torsion component 6 includes a limiting sleeve 601 fitted onto the steel pipe body 1 through an anti-corrosion coating 5, a flat bottom frame 602 welded to the outside of the limiting sleeve 601, and a rubber ring 603 bonded and fixed inside the limiting sleeve 601 and located at the rear end of the limiting sleeve 601.

[0033] The inner wall of the limiting sleeve 601 is provided with a groove, which matches the internal thread connecting sleeve 3 and the external thread connecting pipe head 4; the planar bottom frame 602 is provided with circular through holes near its four corners.

[0034] The inner wall of the rubber ring 603 is uniformly provided with multiple grooves.

[0035] Specifically, the internal threaded connecting sleeve 3 can also match the inner wall groove of the limiting sleeve 601 in the anti-torsion component 6. When the limiting sleeve 601 is fitted on its outer side, it further restricts the rotation of the internal threaded connecting sleeve 3 and prevents the pipe fittings from loosening after splicing.

[0036] The polygonal outer frame structure of the external threaded connecting pipe head 4 can also be adapted to the inner wall groove of the limiting sleeve 601. When the limiting sleeve 601 is fitted, it restricts the rotation of the external threaded connecting pipe head 4 and works together with the internal threaded connecting sleeve 3 to enhance the anti-torsion effect after the pipe fittings are spliced.

[0037] The anti-corrosion coating 5 provides a smooth and corrosion-resistant mounting surface for the limiting sleeve 601 of the anti-torsion assembly 6, reducing wear between the limiting sleeve 601 and the steel pipe body 1.

[0038] The groove on the inner wall of the limiting sleeve 601 matches the internal thread connecting sleeve 3 and the external thread connecting pipe head 4. After the pipe fittings are spliced, the limiting sleeve 601 is pulled along the steel pipe body 1 so that it fits on the outside of the internal thread connecting sleeve 3 and the external thread connecting pipe head 4. Through the cooperation of the groove with the two, the relative rotation of the internal thread connecting sleeve 3 and the external thread connecting pipe head 4 is restricted, thereby preventing the pipe fittings from twisting and loosening after splicing, and ensuring the connection stability at the splice. The flat bottom frame 602 is welded to the outside of the limiting sleeve 601. The circular through holes near the four corners of the frame facilitate the use of bolts and other fasteners to fix the pipe fittings to the wall or other mounting surface, making the pipe fittings more stable. When multiple steel-plastic pipe fittings are installed side by side, the flat bottom frame 602 fits together and can mutually restrict the rotation of adjacent pipe fittings, further enhancing the overall anti-torsion effect of the pipe fittings and ensuring that multiple pipe fittings remain neat and stable after installation. The rubber ring 603 is bonded and fixed inside the limiting sleeve 601 and located at the rear end of the limiting sleeve 601. It has good elasticity and anti-slip properties and can fit tightly between the limiting sleeve 601 and the steel pipe body 1 (separated by the anti-corrosion coating 5), playing an anti-slip role and preventing the limiting sleeve 601 from sliding freely on the steel pipe body 1, ensuring the stable performance of the anti-torsion function of the limiting sleeve 601. At the same time, the multiple grooves evenly opened on the inner wall of the rubber ring 603 can increase the lateral friction between the rubber ring 603 and the outer anti-corrosion coating 5 of the steel pipe body 1, further improving the anti-slip effect and making the position of the limiting sleeve 601 more stable.

[0039] When this utility model is in operation: during the pipe splicing operation, align the external threaded connector 4 of one pipe with the internal threaded connector 3 of the other pipe, rotate the pipe to make the threaded protrusion of the external threaded connector 4 and the threaded groove of the internal threaded connector 3 spirally engage, and at the same time ensure that the protrusion of the polygonal outer frame at the rear end of the external threaded connector 4 is aligned with the limiting protrusion of the internal threaded connector 3, until the two pipes are spliced ​​tightly without obvious gaps.

[0040] When positioning and fixing the anti-torsion component 6, push the limiting sleeve 601 of the anti-torsion component 6 along the steel pipe body 1 of the spliced ​​fittings, so that it moves towards the splice of the two fittings until the groove on the inner wall of the limiting sleeve 601 is fully matched and fitted with the internal thread connecting sleeve 3 and the external thread connecting pipe head 4. At this time, the rubber ring 603 increases the friction with the anti-corrosion coating 5 through its own elasticity and the inner wall groove, preventing the limiting sleeve 601 from sliding. Then, using bolts and other fasteners, pass through the circular through holes at the four corners of the flat bottom frame 602 to fix the fittings to the preset wall or other mounting surface. If multiple fittings are installed side by side, ensure that the flat bottom frames 602 of adjacent fittings fit together to complete the operation of the entire anti-torsion steel-plastic pipe fitting.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A torsion-proof steel-plastic pipe fitting, characterized in that: The system includes a steel pipe body (1), a plastic pipe assembly (2) is bonded and fixed to the inner wall of the steel pipe body (1), an internal threaded connecting sleeve (3) is installed at the rear end of the steel pipe body (1), an external threaded connecting pipe head (4) is installed at the front end of the steel pipe body (1), an anti-corrosion coating (5) is sprayed on the outer side of the steel pipe body (1), and an anti-torsion assembly (6) is sleeved on the outer side of the steel pipe body (1) through the anti-corrosion coating (5).

2. A torsion-proof steel-plastic pipe according to claim 1, characterized in that: The rear end of the plastic tube assembly (2) is inserted into the interior of the internal threaded connecting sleeve (3), and the rear end of the plastic tube assembly (2) is aligned with the rear end of the internal threaded connecting sleeve (3).

3. A torsion-proof steel-plastic pipe according to claim 2, characterized in that: The outer side of the internal threaded connecting sleeve (3) is provided with multiple limiting protrusions, and the inner side of the internal threaded connecting sleeve (3) is provided with a threaded groove.

4. A torsion-proof steel-plastic pipe according to claim 3, characterized in that: The rear end of the external threaded connector (4) is a polygonal outer frame. The protrusion of the polygonal outer frame is aligned with the limiting protrusion of the internal threaded connector (3), and the outer front end of the external threaded connector (4) is provided with a threaded protrusion.

5. A torsion-proof steel-plastic pipe according to claim 4, characterized in that: The anti-torsion assembly (6) includes a limiting sleeve (601) fitted onto the steel pipe body (1) through an anti-corrosion coating (5), a flat bottom frame (602) welded to the outside of the limiting sleeve (601), and a rubber ring (603) bonded and fixed inside the limiting sleeve (601) and located at the rear end of the limiting sleeve (601).

6. A torsion-proof steel-plastic pipe according to claim 5, characterized in that: The inner wall of the limiting sleeve (601) is provided with a groove, which matches the internal thread connecting sleeve (3) and the external thread connecting pipe head (4); the planar bottom frame (602) is provided with a circular through hole near its four corners.

7. A torsion-proof steel-plastic pipe according to claim 6, characterized in that: The inner wall of the rubber ring (603) is uniformly provided with multiple grooves.

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