A compression-resistant corrugated pipe for prestressed concrete

Abstract

The present invention provides a compression-resistant corrugated pipe for prestressed concrete, comprising a corrugated pipe body, and a receiving device and a plug device for connecting adjacent corrugated pipes are respectively arranged at both ends of the corrugated pipe body, the receiving device comprises a joint arranged at the end of the corrugated pipe body, a socket is arranged on the end surface of the joint away from the corrugated pipe body, a plurality of sealing grooves are arranged on the inner wall of the socket, the plug device comprises a plug arranged at one end of the corrugated pipe body away from the joint and used for plugging with the socket, a plurality of annular grooves aligned with the sealing grooves are arranged on the outer wall of the plug, a sealing collar is embedded in the annular groove, and a ring expanding mechanism for expanding the sealing collar outward and partially embedding it in the sealing groove is arranged in the plug. The compression-resistant corrugated pipe for prestressed concrete solves the problems of slow installation speed and poor sealing in the prior art by arranging a receiving device and a plug device that can be quickly connected at both ends of the corrugated pipe body.

Description

Technical Field

[0001] The invention relates to the technical field of corrugated pipes, in particular to a compression-resistant corrugated pipe for prestressed concrete. Background Art

[0002] Prestressed concrete corrugated pipes are mainly used as pipes in the reserved holes in post-tensioned prestressed concrete structures. As the hole-forming pipes for concrete prestressed tendons, the prestressed corrugated pipes on the market are mainly divided into two types according to the material: plastic corrugated pipes (HDPE, PP) and metal corrugated pipes. Among them, metal corrugated pipes refer to metal pipes made of galvanized or non-galvanized low-carbon steel with spiral folded bites and used for the reserved holes in post-tensioned prestressed concrete structural components. They are mainly used for non-concentric axial transmission with a very small bending radius, or irregular turning, expansion and contraction, or absorbing thermal deformation of the pipe.

[0003] The construction process of the corrugated pipe is as follows: workers first dig a groove on the road, then put the corrugated pipe into the groove, and then connect the adjacent corrugated pipes together to form a pipeline system. At present, corrugated pipes are usually connected together by welding. This connection method is not only slow to install, but also leaks during welding, affecting the sealing of the corrugated pipe. Summary of the invention

[0004] The problem to be solved by the present invention is to provide a compression-resistant corrugated pipe for prestressed concrete in view of the above-mentioned deficiencies existing in the prior art, which solves the problems of slow installation speed and poor sealing performance existing in the prior art.

[0005] The above-mentioned inventive object of the present invention is achieved through the following technical scheme: A compression-resistant corrugated pipe for prestressed concrete, comprising a corrugated pipe body, and a receiving device and a plug device for connecting adjacent corrugated pipes are respectively arranged at both ends of the corrugated pipe body, the receiving device comprises a joint arranged on the end of the corrugated pipe body, a socket is arranged on the end surface of the joint away from the corrugated pipe body, a plurality of sealing grooves are arranged on the inner wall of the socket, the plug device comprises a plug arranged at one end of the corrugated pipe body away from the joint and used for plugging and cooperating with the socket, a plurality of annular grooves aligned with the sealing grooves are arranged on the outer wall of the plug, a sealing clamp ring is embedded in the annular groove, and a ring expansion mechanism is arranged in the plug for expanding the sealing clamp ring outward and partially embedding it in the sealing groove.

[0006] The present invention is further configured as follows: a plurality of sliding holes are opened on the bottom wall of the annular groove, and the ring expansion mechanism includes a slider slidably arranged in the sliding hole and used to push the sealing clamp ring to expand outward, and a control block assembly arranged in the plug and used to control the reciprocating sliding of the slider in the sliding hole.

[0007] The present invention is further configured as follows: a guide hole and a mounting groove are sequentially opened on the end surface of the plug facing away from the corrugated tube body, the mounting groove is connected to the sliding hole, the control block assembly includes a push rod slidably arranged in the guide hole and inserted into the mounting groove, a connecting rod hinged to the push rod at one end and hinged to the slider at the other end, and the hinge point of the push rod and the connecting rod is located on the side of the hinge point of the slider and the connecting rod away from the corrugated tube body.

[0008] The present invention is further configured as follows: a spring groove is provided on the groove wall of the installation groove close to the bellows body, and a force-bearing disk is provided at one end of the push rod close to the bellows body, which is inserted into the spring groove and slidably cooperates with the spring groove, and a reset spring is provided in the spring groove for pushing the force-bearing disk and the push rod to reset.

[0009] The present invention is further configured as follows: a push plate slidably matched with the annular groove is arranged on the end surface of each of the sliding blocks close to the annular groove, and the cross section of the push plate is a fan ring.

[0010] The present invention is further configured as follows: a plug flange is provided on the outer side wall of the plug, and a connector flange flange connected to the plug flange is provided on the outer side wall of the connector.

[0011] The present invention is further configured as follows: the corrugated pipe body comprises a metal layer, an inner plastic layer is arranged on the inner side of the metal layer, and the material of the inner plastic layer is type III polypropylene.

[0012] The present invention is further configured as follows: an outer plastic layer is arranged on the outer side of the metal layer, and the material of the outer plastic layer is type III polypropylene.

[0013] The present invention is further configured as follows: the bellows body includes a bellows section, a plug connecting section which is arranged at one end of the bellows section close to the plug and has an external thread; a plug threaded hole which is threadably matched with the plug connecting section is provided on the end surface of the plug facing the bellows body; a plug sealing ring is provided between the end surface of the plug connecting section which is away from the bellows section and the plug.

[0014] The present invention is further configured as follows: a joint connecting section with an external thread is provided at one end of the corrugated section close to the joint, a joint threaded hole that cooperates with the joint connecting section thread is provided on the end surface of the joint facing the corrugated pipe body, and a joint sealing ring is provided between the end surface of the joint connecting section facing away from the corrugated section and the joint.

[0015] In summary, the beneficial technical effects of the present invention are as follows: the compression-resistant corrugated pipe for prestressed concrete solves the problems of slow installation speed and poor sealing in the prior art by providing a quick-connection receiving device and a plug device at both ends of the corrugated pipe body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1It is a schematic structural diagram of a compression-resistant corrugated pipe for prestressed concrete in the present invention;

[0017] Figure 2 It is a cross-sectional structural diagram of a compression-resistant corrugated pipe for prestressed concrete in the present invention;

[0018] Figure 3 yes Figure 2 The enlarged view of point A in the middle;

[0019] Figure 4 is a partial cross-sectional view of the plug device of the present invention;

[0020] Figure 5 It is a structural schematic diagram of the plug device in the present invention;

[0021] Figure 6 It is a schematic diagram of the structure of various components in the plug device of the present invention.

[0022] In the above drawings: 1, bellows body; 11, inner plastic layer; 12, metal layer; 13, outer plastic layer; 14, corrugated section; 15, plug connection section; 16, joint connection section; 2, receiving device; 3, plug device; 4, joint; 5, joint threaded hole; 6, joint sealing ring; 7, socket; 8, sealing card groove; 9, joint flange; 10, plug; 17, plug threaded hole; 18, plug sealing ring; 19, ring groove; 20, sliding hole; 21, guide hole; 22, mounting groove; 23, spring groove; 24, sealing card ring; 25, slider; 26, push plate; 27, control block mechanism; 28, push rod; 29, connecting rod; 30, hinged frame; 31, hinged hole; 32, force plate; 33, reset spring; 34, plug flange. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and functions achieved by the present invention clearer and easier to understand, the present invention is further explained below in conjunction with the accompanying drawings and specific implementation methods.

[0024] like Figure 1 As shown, the present invention proposes a compression-resistant corrugated pipe for prestressed concrete, comprising a corrugated pipe body 1, and receiving devices 2 and plug devices 3 for connecting adjacent corrugated pipes are respectively arranged at both ends of the corrugated pipe.

[0025] like Figure 2 and 3As shown, the corrugated pipe body 1 is composed of an inner plastic layer 11, a metal layer 12, and an outer plastic layer 13 from the inside to the outside. The materials of the inner plastic layer 11 and the outer plastic layer 13 are homopolymer type III polypropylene. The inner plastic layer 11 made of type III polypropylene has the advantages of environmental protection, light weight and high strength, corrosion resistance, smooth inner wall without scaling, and long service life. The outer plastic layer 13 made of type III polypropylene has the advantages of corrosion resistance and long service life. The material of the metal layer 12 is aluminum alloy. The metal layer 12 and the inner plastic layer 11 and the outer plastic layer 13 are all bonded together by hot melt adhesive. The metal layer 12 made of aluminum alloy has the advantages of light weight and high strength. The metal layer 12 is used as the skeleton structure of the corrugated pipe body 1, so that the corrugated pipe body 1 has the advantage of high structural strength.

[0026] like Figure 2 As shown, the bellows body 1 includes a bellows section 14, a plug connection section 15 and a joint connection section 16 which are integrally connected to both ends of the bellows section 14, the outer wall of the plug connection section 15 has an external thread, the external thread of the plug connection section 15 is located on the outer plastic layer 13, the outer wall of the joint connection section 16 has an external thread, and the external thread of the joint connection section 16 is located on the outer plastic layer 13.

[0027] like Figure 1 and 2 As shown, the receiving device 2 includes a cylindrical joint 4, which is installed on the end of the corrugated pipe body 1. A joint threaded hole 5 that is threadedly matched with the joint connecting section 16 is provided on the end surface of the joint 4 facing the corrugated pipe body 1, and a joint sealing ring 6 is provided between the end surface of the joint connecting section 16 facing away from the corrugated section 14 and the joint 4. During installation, the joint sealing ring 6 is first placed in the joint threaded hole 5, and then the joint connecting section 16 is screwed into the joint threaded hole 5. A socket 7 is provided on the end surface of the joint 4 facing away from the corrugated pipe body 1, and two annular sealing grooves 8 are provided on the inner wall of the socket 7. A joint flange 9 is integrally connected to the outer wall of the joint 4, and the joint flange 9 is located at the end of the joint 4 away from the corrugated pipe body 1.

[0028] like Figure 2 As shown, the plug device 3 includes a cylindrical plug 10, which is plugged into the socket 7 of the connector 4. The plug 10 is installed at the end of the corrugated tube body 1 away from the connector 4. A plug threaded hole 17 that is threadedly matched with the plug connecting section 15 is provided on the end surface of the plug 10 facing the corrugated tube body 1, and a plug sealing ring 18 is provided between the end surface of the plug connecting section 15 away from the corrugated section 14 and the plug 10. During installation, the plug sealing ring 18 is first placed in the plug threaded hole 17, and then the plug connecting section 15 is screwed into the plug threaded hole 17.

[0029] like Figure 4 and 5As shown, two annular ring grooves 19 are provided on the outer wall of the plug 10, and the two ring grooves 19 are aligned with the two sealing grooves 8 respectively. Four sliding holes 20 are provided on the bottom wall of each ring groove 19 at equal distances from the circumference, and the sliding holes 20 are rectangular holes. A guide hole 21, a mounting groove 22, and a spring groove 23 are provided in sequence on the end surface of the plug 10 away from the corrugated tube body 1. The number of the guide holes 21, the mounting groove 22, and the spring groove 23 is four groups, and the four groups of guide holes 21, the mounting groove 22, and the spring groove 23 are distributed at equal distances from the circumference. Each group of guide holes 21, the mounting groove 22, and the spring groove 23 is located on the inner side of the corresponding sliding hole 20. The guide hole 21 is a circular hole, and the side of the mounting groove 22 close to the sliding hole 20 is connected to the corresponding two sliding holes 20. The cross section of the spring groove 23 is circular, and the diameter of the spring groove 23 is larger than the diameter of the guide hole 21.

[0030] A sealing collar 24 is embedded in each slide groove, and a ring expansion mechanism is provided in the plug 10, which is used to expand the sealing collar 24 outward and partially embed it in the sealing groove 8. The ring expansion mechanism includes a slider 25, which is slidably arranged in the slide hole 20, and a push plate 26 is fixedly connected to the end surface of each slider 25 close to the ring groove 19. The cross section of the push plate 26 is a fan ring, and four push plates 26 are assembled into a complete ring. The push plate 26 is slidably arranged in the ring groove 19, and the push plate 26 is located on the inner side of the sealing collar 24. The midpoint of the end surface of each push plate 26 facing the sealing collar 24 is glued to the sealing collar 24, so that the push plate 26 can drive the sealing collar 24 to move.

[0031] like Figure 4 and 6 As shown, a control block mechanism 27 is provided in the plug 10, and the control block mechanism 27 is used to control the slider 25 to slide back and forth in the slide hole 20, thereby driving the push plate 26 to open or reset outward, and the control block mechanism 27 includes a push rod 28 and a connecting rod 29. The push rod 28 is slidably arranged in the guide hole 21, and when not installed, the end of the push plate 26 away from the corrugated tube body 1 extends out of the guide hole 21. One end of the connecting rod 29 is hinged to the push rod 28, and the other end is hinged to the slider 25. A hinge frame 30 is fixedly connected to the outer wall of the push plate 26. The hinge frame 30 is composed of two flat plates and a pin is arranged between the two flat plates. A hinge hole 31 is opened on the slider 25, and a pin is arranged in the hinge hole 31. The connecting rod 29 and the push rod 28 are hinged through the hinge frame 30 and the pin, and the connecting rod 29 and the slider 25 are hinged through the pin. The hinge point of the push rod 28 and the connecting rod 29 is located on the side of the hinge point of the slider 25 and the connecting rod 29 away from the bellows body 1. When the push rod 28 moves toward the bellows body 1, the connecting rod 29 will push the slider 25 and the push plate 26 to move toward the sealing clamp ring 24, thereby pushing the sealing clamp ring 24 to expand outward.

[0032] like Figure 4 and 6As shown, a circular plate-shaped force disk 32 is fixedly connected to one end of the push rod 28 close to the spring groove 23. The diameter of the force disk 32 is larger than that of the push rod 28. The force disk 32 is inserted into the spring groove 23 and slides with the spring groove 23. A return spring 33 is arranged between the force disk 32 and the bottom wall of the spring groove 23. The return spring 33 is used to push the force disk 32 and the push rod 28 to move away from the spring groove 23 and then return to the original position.

[0033] like Figure 2 As shown, a plug flange 34 is integrally connected to the outer wall of the plug 10, and the plug flange 34 is used for flange connection with the joint flange 9, thereby fixing the receiving device 2 and the plug device 3 together, and a sealing gasket for sealing is provided between the plug flange 34 and the joint flange 9.

[0034] The detailed working process of this embodiment is as follows:

[0035] S1: Workers first dig a trench on the road for installing the pipeline, and then put the corrugated pipes into the trench one by one;

[0036] S2: The worker inserts the plug 10 of the latter bellows into the socket 7 of the former bellows until the plug 10 is completely inserted into the socket 7, and the push rod 28 is pressed and moves toward the bellows body 1. At the same time, the connecting rod 29 pushes the slider 25 and the push plate 26 to move toward the sealing collar 24, thereby pushing the sealing collar 24 to expand outward, until half of the sealing collar 24 is embedded in the sealing groove 8, and the other half remains in the annular groove 19;

[0037] S3: The worker connects the joint flange 9 of the previous bellows and the plug flange 34 of the subsequent bellows with bolts.

[0038] The compression-resistant corrugated pipe for prestressed concrete solves the problems of slow installation speed and poor sealing in the prior art by arranging a receiving device 2 and a plug device 3 that can be quickly connected at both ends of the corrugated pipe body 1.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A compression-resistant corrugated pipe for prestressed concrete, comprising a corrugated pipe body (1), characterized in that: The two ends of the bellows body (1) are respectively provided with a receiving device (2) and a plug device (3) for connecting adjacent bellows together. The receiving device (2) includes a joint (4) arranged on the end of the bellows body (1). The end surface of the joint (4) facing away from the bellows body (1) is provided with a socket (7). The inner wall of the socket (7) is provided with a plurality of sealing grooves (8). The plug device (3) includes a plug (10) arranged at one end of the bellows body (1) away from the joint (4) and used for plugging and matching with the socket (7). The outer wall of the plug (10) is provided with a plurality of annular grooves (19) aligned with the sealing grooves (8). A sealing collar (24) is embedded in the annular groove (19). The plug (10) is provided with an expanding ring mechanism for expanding the sealing collar (24) outward and partially embedding it in the sealing groove (8). A plurality of sliding holes (20) are provided on the bottom wall of the annular groove (19), and the ring expansion mechanism comprises a slider (25) slidably arranged in the sliding hole (20) and used for pushing the sealing collar (24) to expand outward, and a control block assembly arranged in the plug (10) and used for controlling the slider (25) to slide back and forth in the sliding hole (20); A guide hole (21) and a mounting groove (22) are sequentially provided on the end surface of the plug (10) facing away from the corrugated tube body (1); the mounting groove (22) is communicated with the slide hole (20); the control block assembly comprises a push rod (28) slidably arranged in the guide hole (21) and inserted into the mounting groove (22); and a connecting rod (29) hinged at one end to the push rod (28) and hinged at the other end to the slider (25); the hinge point of the push rod (28) and the connecting rod (29) is located on the side of the hinge point of the slider (25) and the connecting rod (29) away from the corrugated tube body (1); A spring groove (23) is provided on the groove wall of the installation groove (22) close to the bellows body (1); a force-bearing disk (32) inserted into the spring groove (23) and slidingly matched with the spring groove (23) is provided at one end of the push rod (28) close to the bellows body (1); a return spring (33) for pushing the force-bearing disk (32) and the push rod (28) to return to their original position is provided in the spring groove (23); A push plate (26) which is slidably matched with the annular groove (19) is arranged on the end surface of each sliding block (25) close to the annular groove (19), and the cross section of the push plate (26) is a sector ring.

2. The compression-resistant corrugated pipe for prestressed concrete according to claim 1, characterized in that: A plug flange (34) is provided on the outer wall of the plug (10), and a joint flange (9) flange-connected to the plug flange (34) is provided on the outer wall of the joint (4).

3. The compression-resistant corrugated pipe for prestressed concrete according to claim 1, characterized in that: The corrugated pipe body (1) comprises a metal layer (12), an inner plastic layer (11) is arranged on the inner side of the metal layer (12), and the material of the inner plastic layer (11) is type III polypropylene.

4. The compression-resistant corrugated pipe for prestressed concrete according to claim 3, characterized in that: An outer plastic layer (13) is arranged on the outer side of the metal layer (12), and the material of the outer plastic layer (13) is type III polypropylene.

5. The compression-resistant corrugated pipe for prestressed concrete according to claim 1, characterized in that: The bellows body (1) comprises a bellows section (14), a plug connection section (15) provided at one end of the bellows section (14) close to the plug (10) and having an external thread, a plug threaded hole (17) threadedly matched with the plug connection section (15) is provided on the end surface of the plug (10) facing the bellows body (1), and a plug sealing ring (18) is provided between the end surface of the plug connection section (15) facing away from the bellows section (14) and the plug (10).

6. The compression-resistant corrugated pipe for prestressed concrete according to claim 5, characterized in that: A joint connecting section (16) having an external thread is arranged at one end of the corrugated section (14) close to the joint (4); a joint threaded hole (5) threadedly matched with the joint connecting section (16) is provided on the end surface of the joint (4) facing the corrugated pipe body (1); and a joint sealing ring (6) is arranged between the end surface of the joint connecting section (16) facing away from the corrugated section (14) and the joint (4).

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