Steel-plastic conversion pipe with protective sleeve

Abstract

The application discloses a steel-plastic conversion pipe with a protective sleeve, which comprises a pipe body, first annular pieces arranged at the axial two ends of the pipe body, sliding grooves arranged on the inner sides of the pipe body ends and the inner sides of the first annular pieces, first and second housings arranged at the axial two ends of the pipe body respectively, and mounting holes arranged on the first housing. In the application, thermosetting glue is arranged in the first capsule, quicklime and activated carbon are arranged in the second capsule, and water is arranged in the third capsule. The first capsule is punctured by the second puncture rod, so that the thermosetting glue leaks out. The third capsule is punctured by the first puncture rod, so that water flows out to contact the quicklime. The quicklime can release a large amount of heat when meeting water, so that the thermosetting glue can be heat-cured. Compared with a buckle connection, the thermosetting glue adhesion is more firm, and the protective sleeve is not easy to fall off after long-term use. Meanwhile, additional heating equipment is not needed, and the convenience of installing the protective sleeve in a narrow space is improved.

Description

Technical Field

[0001] This invention relates to the field of pipe connection technology, and in particular to a steel-plastic transition pipe with a protective sleeve. Background Technology

[0002] Currently, the PE end of the steel-plastic transition joint in buried and household gas pipelines is a weak point of stress concentration. It is prone to scratches or shear damage during transportation, construction and use, which has a certain impact on the safety of pipeline operation.

[0003] The common method is to add a section of PE pipe of equal diameter as a sleeve at the weak point of the steel-plastic transition joint, or to use a protective sleeve with different diameters and widths. The protective sleeve is composed of two axial halves connected by several clips. Since the clips are mostly made of plastic and are small in size, their structural strength will decrease after long-term use. When buried underground, due to long-term load or the pressure of the soil covering outside the PE sleeve and the gap inside, the internal and external pressures are uneven, and the clips are easy to deform, fail, or break, thus causing the steel-plastic transition joint to lose its protective effect. Summary of the Invention

[0004] The purpose of this invention is to provide a steel-plastic conversion tube with a protective sleeve in order to solve the above-mentioned problems.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A steel-plastic conversion pipe with a protective sleeve includes a pipe body. First annular members are provided at both axial ends of the pipe body. Sliding grooves are provided on the inner sides of both ends of the pipe body and the first annular members. A first shell and a second shell are respectively provided at both axial ends of the pipe body. The first shell has mounting holes. Two semi-circular sheathing segments are provided on the outer periphery of the pipe body. Semi-circular connecting segments are provided at both axial ends of each sheathing segment. A semi-circular first protrusion is provided on the inner side of each sheathing segment. An adhesive portion is provided between the two sheathing segments. The device includes two third housings, which are respectively disposed on two sheath tubes. One third housing contains a first plate, a first capsule, an elastic component, and a first puncture rod. The other third housing contains a second plate, a second capsule, and a third capsule. The second plate has a second puncture rod. The first plate has a first through hole, and the second plate has a second through hole. The first capsule contains thermosetting adhesive, the second capsule contains quicklime and activated carbon, and the third capsule contains water.

[0007] Preferably, the outer periphery of both axial ends of the tube body and the outer periphery of the first annular member near the end of the tube body are provided with annular protrusions, and the two annular protrusions are connected by bolts.

[0008] Preferably, both the first housing and the second housing are spherical structures, and multiple mounting holes are provided. A first sealing ring is provided on each of the two sliding grooves inside the tube and the first annular component. Both the first housing and the second housing slide in contact with the sliding grooves, and both slide in contact with the first sealing rings.

[0009] Preferably, there are multiple first protrusions, which are evenly spaced along the axial direction of the sheath tube, and the inner side of the first protrusion abuts against the outer wall of the tube body.

[0010] Preferably, the outer periphery of the connecting tube near the sheath tube is provided with a semi-circular second protrusion, and the second protrusion is fixedly connected to the annular protrusion by bolts.

[0011] Preferably, a second annular component is provided on the inner side of the end of the connecting tube segment away from the sheath tube segment, and a blocking putty is provided on the inner side of the second annular component.

[0012] Preferably, the elastic component includes a cylinder, inside which a rod is disposed, the upper end of the rod extending to the outside of the cylinder and having a connecting rod at the extended end, the lower end of the rod being fixedly connected to a first puncture rod, the first puncture rod being located inside the cylinder and the two being slidably connected, and an elastic element being disposed between the top of the cylinder and the first puncture rod.

[0013] Preferably, the bottom of the first puncture rod and the top of the second puncture rod are both tapered structures, the second puncture rod is provided with multiple fixing rings, the second capsule is made of non-woven fabric, the first puncture rod is coaxially arranged with the second through hole, the second puncture rod is coaxially arranged with the first through hole, and a second sealing ring is provided in the second through hole.

[0014] Preferably, it also includes a heat-shrinkable sheath, which wraps the tube body, sleeve, connecting tube, first housing and second housing to protect the metal parts of the device from corrosion.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0016] 1. This application utilizes a sheathed tube with an adhesive section. The adhesive section comprises a first bladder, a second bladder, a third bladder, a first puncture rod, and a second puncture rod. The first bladder contains thermosetting adhesive, the second bladder contains quicklime and activated carbon, and the third bladder contains water. During installation, the second puncture rod punctures the first bladder, allowing the thermosetting adhesive to leak out. After a period of time, once all the thermosetting adhesive has completely leaked out, the first puncture rod punctures the third bladder, allowing the water to flow out and contact the quicklime. The quicklime releases a large amount of heat upon contact with the water, causing the thermosetting adhesive to cure and thus bond the sheathed tube. Compared to snap-fit ​​connections, thermosetting adhesive provides a stronger bond, ensuring it is less likely to detach after long-term use. Furthermore, the thermosetting adhesive is self-heating, eliminating the need for additional heating equipment and improving the ease of installation in confined spaces.

[0017] 2. This application sets up a pipe body with a first shell and a second shell at both ends of the pipe body. Both the first shell and the second shell are in sliding contact with the ends of the pipe body. Therefore, when the soil settlement is asynchronous, the first shell and the second shell deflect to ensure that the connection between the PE pipe and the steel pipe still has good sealing performance and structural strength, thereby improving the reliability of the conversion pipe. Attached Figure Description

[0018] Figure 1 A schematic diagram of the overall structure of the conversion tube and protective sleeve provided according to Embodiment 1 of the present invention is shown;

[0019] Figure 2 A schematic diagram of the combination structure of the conversion tube and protective sleeve provided in Embodiment 1 of the present invention is shown;

[0020] Figure 3 A schematic diagram of the overall structure of the converter tube provided in Embodiment 1 of the present invention is shown;

[0021] Figure 4 An exploded view of the converter tube provided in Embodiment 1 of the present invention is shown;

[0022] Figure 5 An exploded view of the protective sleeve provided according to Embodiment 1 of the present invention is shown;

[0023] Figure 6 A schematic diagram of the third shell, first capsule, second capsule, and third capsule structure provided according to Embodiment 1 of the present invention is shown;

[0024] Figure 7 A schematic diagram of the third housing, the first puncture rod, and the second puncture rod provided according to Embodiment 1 of the present invention is shown;

[0025] Figure 8A schematic diagram of the first puncture rod and elastic element structure provided according to Embodiment 1 of the present invention is shown.

[0026] Figure 9 A schematic diagram of the overall structure provided according to Embodiment 2 of the present invention is shown.

[0027] Legend:

[0028] 1. Tube body; 2. First annular component; 3. Slide groove; 4. First shell; 5. Second shell; 6. First sealing ring; 7. Sheath tube; 8. First protrusion; 9. Connecting tube; 10. Second annular component; 11. Blocking putty; 12. Third shell; 13. First bladder; 14. Cylinder; 15. Rod; 16. Elastic component; 17. First puncture rod; 18. Connecting rod; 19. First through hole; 20. Second bladder; 21. Third bladder; 22. Second puncture rod; 23. Fixing ring; 24. Second through hole; 25. Second sealing ring; 26. Mounting hole; 27. Annular protrusion; 28. Second protrusion; 29. ​​First plate; 30. Second plate; 31. Heat shrinkable sheath. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Example 1

[0031] Please see Figure 1-8 The present invention provides a technical solution:

[0032] A steel-plastic conversion pipe with a protective sleeve includes a pipe body 1. Both axial ends of the pipe body 1 are provided with first annular members 2. The inner sides of both ends of the pipe body 1 and the first annular members 2 are provided with sliding grooves 3. Both axial ends of the pipe body 1 are respectively provided with a first shell 4 and a second shell 5. The first shell 4 has mounting holes 26 into which a PE pipe is inserted. The steel pipe is connected to the second shell 5 via a flange. During installation, the pipe body 1, the PE pipe, and the steel pipe must be kept coaxial. Two semi-circular sheathing segments 7 are provided on the outer periphery of the pipe body 1. Both axial ends of the sheathing segments 7 are provided with semi-circular connecting segments 9. The inner side of each sheathing segment 7 has a semi-circular first protrusion 8. An adhesive portion is provided between the two sheathing segments 7. The adhesive portion connects the two sheathing segments 7, and the sheathing segments 7 provide support and protection for the connection between the PE pipe and the steel pipe.

[0033] Specifically, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, both the first housing 4 and the second housing 5 are spherical structures with multiple mounting holes 26 of different diameters. Two mounting holes 26 form a group and are distributed at both ends of the spherical diameter of the first housing 4. The different sizes of the mounting holes 26 are used to accommodate PE pipes of different diameters. A sealing gasket is installed between the PE pipe and the mounting hole 26. First sealing rings 6 are provided on both the pipe body 1 and the two sliding grooves 3 within the first annular component 2. Both the first housing 4 and the second housing 5 slide in contact with the sliding grooves 3 and with the first sealing rings 6. The first sealing rings 6 enhance the airtightness of the connection between the PE pipe and the first housing 4, and the connection between the steel pipe and the second housing 5. While ensuring a seal, both the first housing 4 and the second housing 5 slide in contact with the sliding grooves 3. In the event of uneven settlement, the deflection of the first housing 4 and the second housing 5 reduces the bending pressure on the conversion pipe structure, thereby improving the structural stability of the conversion pipe. Multiple first protrusions 8 are provided and are evenly spaced along the axial direction of the sheathing tube 7. The inner side of the first protrusion 8 abuts against the outer wall of the tube body 1. The first protrusion 8 provides support for the tube body 1 and increases the structural strength of the sheathing tube 7. Annular protrusions 27 are provided on the outer periphery of both ends of the tube body 1 and on the outer periphery of the first annular member 2 near the end of the tube body 1. Two annular protrusions 27 are connected by bolts. A semi-circular second protrusion 28 is provided on the outer periphery of the connecting tube 9 near the end of the sheathing tube 7. The second protrusion 28 is fixedly connected to the annular protrusion 27 by bolts. The tube body 1, the first annular member 2, and the connecting tube 9 are connected as a single unit by bolts, facilitating easy assembly and disassembly and ensuring a stable and reliable structure. A second annular member 10 is provided on the inner side of the connecting tube 9 away from the sheathing tube 7, and a sealing putty 11 is provided on the inner side of the second annular member 10. The connecting pipe segment 9 and the second annular component 10 are integrally formed. The sealing putty 11 fills the gap between the second annular component 10, the PE pipe, and the steel pipe to improve the sealing of the inside of the conversion pipe and reduce the entry of corrosive substances into the conversion pipe.

[0034] Specifically, such as Figure 1 , Figure 5 , Figure 6 , Figure 7 and Figure 8As shown, the bonding part includes two third housings 12, which are respectively disposed on two sheath tubes 7. The third housings 12 are fixedly connected to the arc-shaped ends of the sheath tubes 7. One of the third housings 12 contains a first plate 29, a first capsule 13, an elastic component, and a first puncture rod 17. The other third housing 12 contains a second plate 30, a second capsule 20, and a third capsule 21. The second plate 30 is provided with a second puncture rod 22. The first plate 29 is provided with a first through hole 19, and the second plate 30 is provided with a second through hole 24. The first capsule 13 contains thermosetting adhesive, the second capsule 20 contains quicklime and activated carbon, and the third capsule 21 contains water. The elastic component includes a cylindrical body 14, inside which a rod 15 is disposed. The upper end of the rod 15 extends to the outside of the cylindrical body 14, and a connecting rod 18 is disposed at the extended end. The lower end of the rod 15 is fixedly connected to a first puncture rod 17, which is located inside the cylindrical body 14 and the two are slidably connected. An elastic element 16 is disposed between the top of the cylindrical body 14 and the first puncture rod 17. The bottom of the first puncture rod 17 and the top of the second puncture rod 22 are both tapered structures. Multiple fixing rings 23 are disposed on the second puncture rod 22. The second capsule 20 is made of non-woven fabric. The first puncture rod 17 is coaxially disposed with the second through hole 24, and the second puncture rod 22 is coaxially disposed with the first through hole 19. A second sealing ring 25 is disposed inside the second through hole 24. During bonding, the two third shells 12 are aligned and joined together. The first piercing rod 17 passes through the second through hole 24, but its lower end does not pierce the third capsule 21. The second piercing rod 22 passes through the first through hole 19 and pierces the first capsule 13. At this time, the two third shells 12, the first plate 29, and the second plate 30 can form a sealed space. The thermosetting adhesive enters the sealed space through the first through hole 19 under the action of gravity. After it is filled, the first piercing rod 17 is moved downward by moving the connecting rod 18 to pierce the third capsule 21, so that water can flow out. This causes the quicklime to react with the water and release heat, thereby heating the thermosetting adhesive. After the thermosetting adhesive is cured, the fixing ring 23 is embedded in the cured thermosetting adhesive, which plays an anchoring role and improves the connection strength of the two sheathing tubes 7.

[0035] In summary, this embodiment provides a steel-plastic conversion pipe with a protective sleeve. The PE pipe is inserted into the mounting hole 26, the steel pipe is connected to the second shell 5 by bolts, the protective sleeve 7 is attached to the pipe body 1, and the two protective sleeve 7 are spliced ​​to completely cover the outer circumference of the pipe body 1. The connecting sleeve 9 is fixedly connected to the pipe body 1 by bolts. When the two protective sleeve 7 are spliced, the two third shells 12 are aligned and merged. The upper end of the second piercing rod 22 passes through the first through hole 19 and pierces the first capsule 13, so that the thermosetting adhesive passes through the first through hole 19 and is located between the first plate 29 and the second plate 30. After standing for five to ten minutes, the thermosetting adhesive completely fills the space between the first plate 29 and the second plate 30. Then, the connecting rod 18 is pressed down, so that the lower end of the first piercing rod 17 pierces the third capsule 21, allowing water to flow out. The quicklime in the second capsule 20 reacts with water and releases a large amount of heat, thereby heating the thermosetting adhesive and solidifying it, so that the two protective sleeve 7 are bonded together.

[0036] Example 2

[0037] This embodiment is largely the same as Embodiment 1, except that it also includes a heat-shrinkable sheath 31, such as... Figure 9 As shown, the heat shrinkable sheath 31 wraps the pipe body, sleeve segments, connecting segments, first shell and second shell. The wrapping distance at the end of the PE pipe 32 is 5cm to 10cm, and the wrapping length at the end of the steel pipe 33 is determined according to the construction.

[0038] The above description of the embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A steel-plastic transition pipe with a protective sleeve, characterized in that, The tube includes a tube body (1), with a first annular member (2) at both axial ends of the tube body (1), and a sliding groove (3) at the inner side of the end of the tube body (1) and the inner side of the first annular member (2). A first housing (4) and a second housing (5) are respectively provided at both axial ends of the tube body (1). An installation hole (26) is provided on the first housing (4). Two semi-circular sheath tube pieces (7) are provided on the outer periphery of the tube body (1). A semi-circular connecting tube piece (9) is provided at both axial ends of the sheath tube piece (7). A semi-circular first protrusion (8) is provided on the inner side of the sheath tube piece (7). An adhesive part is provided between the two sheath tube pieces (7). The adhesive part includes two third shells (12), which are respectively disposed on the two sheath tubes (7). One of the third shells (12) is provided with a first plate (29), a first capsule (13), an elastic component and a first puncture rod (17). The other third shell (12) is provided with a second plate (30), a second capsule (20) and a third capsule (21). A second puncture rod (22) is provided on the second plate (30). A first through hole (19) is provided on the first plate (29). A second through hole (24) is provided on the second plate (30). Thermosetting adhesive is provided inside the first capsule (13). Quicklime and activated carbon are provided inside the second capsule (20). Water is provided inside the third capsule (21). The outer periphery of both ends of the tube body (1) and the outer periphery of the first annular member (2) near the end of the tube body (1) are provided with annular protrusions (27), and the two annular protrusions (27) are connected by bolts. The first housing (4) and the second housing (5) are both spherical structures. Multiple mounting holes (26) are provided. The two sliding grooves (3) in the tube (1) and the first annular part (2) are each provided with a first sealing ring (6). The first housing (4) and the second housing (5) are in sliding contact with the sliding groove (3) and both are in sliding contact with the first sealing ring (6). The first protrusion (8) is provided in multiple ways and is evenly spaced along the axial direction of the sheath tube (7). The inner side of the first protrusion (8) abuts against the outer wall of the tube body (1). The connecting tube (9) has a semi-circular second protrusion (28) on the outer periphery near the sheath tube (7), and the second protrusion (28) is fixedly connected to the annular protrusion (27) by bolts.

2. The steel-plastic transition pipe with a protective sleeve according to claim 1, characterized in that, A second annular component (10) is provided on the inner side of the end of the connecting tube segment (9) away from the sheath tube segment (7), and a plugging putty (11) is provided on the inner side of the second annular component (10).

3. A steel-plastic transition pipe with a protective sleeve according to claim 1, characterized in that, The elastic component includes a cylinder (14), inside which a rod (15) is provided. The upper end of the rod (15) extends to the outside of the cylinder (14), and a connecting rod (18) is provided at the extended end. The lower end of the rod (15) is fixedly connected to a first puncture rod (17), which is located inside the cylinder (14) and the two are slidably connected. An elastic element (16) is provided between the top of the cylinder (14) and the first puncture rod (17).

4. A steel-plastic transition pipe with a protective sleeve according to claim 1, characterized in that, The bottom of the first puncture rod (17) and the top of the second puncture rod (22) are both conical structures. The second puncture rod (22) is provided with multiple fixing rings (23). The second capsule (20) is made of non-woven fabric. The first puncture rod (17) and the second through hole (24) are coaxially arranged. The second puncture rod (22) and the first through hole (19) are coaxially arranged. The second through hole (24) is provided with a second sealing ring (25).

5. A steel-plastic transition pipe with a protective sleeve according to any one of claims 1-4, characterized in that, It also includes a heat-shrinkable sheath (31) that wraps the tube body (1), the sleeve (7), the connecting tube (9), the first housing (4), and the second housing (5).

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