Large-diameter electric smelting connecting pipe and connecting pipe socket structure

Abstract

The large-diameter electric smelting connecting pipe comprises a pipe body, the two ends of the pipe body are provided with a spigot end and a socket end respectively, the spigot end and the socket end are matched with each other in an inserted mode, the end portion of the spigot end is provided with a first end face, a first step face is formed on the periphery of the spigot end, and a plurality of first clamping tooth parts are formed on the periphery of the spigot end. A second end face is arranged at the end of the socket end, a second step face is formed on the inner circumference of the socket end, and a plurality of second clamping tooth parts are formed on the inner circumference of the socket end; a first electric heating wire is arranged on the first step face. According to the utility model, the electric heating wire is directly pre-buried at the spigot end or the socket end of the pipe body, and the electric heating wire and the pipe body are pre-processed into a whole, so that an additional electric melting pipe body joint is not needed during connection, and then direct insertion and hot melting connection of two large-diameter connecting pipes can be realized, so that the connection of large-diameter pipes can be conveniently realized.

Description

Technical Field

[0001] This utility model relates to a pipe body, and more specifically, to a large-diameter electrofusion connection pipe, and also to a connection pipe socket structure. Background Technology

[0002] Conventional plastic pipes are typically connected via butt fusion welding or electrofusion fittings. However, for pipes of DN1200 or larger specifications, neither butt fusion welding nor electrofusion welding is suitable. Butt fusion welding requires large, heavy, and expensive equipment, which can slow down construction efficiency. Electrofusion fittings, on the other hand, require excessively large fittings, making them difficult to produce due to the large extrusion volume required by injection molding machines.

[0003] Therefore, a new solution is needed to address this problem. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the prior art and provide a large-diameter electrofusion connection pipe and a connection pipe socket structure.

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

[0006] A large-diameter electrofusion connection pipe includes a pipe body with a spigot end and a socket end at both ends, which are mutually pluggable. The spigot end has an end face, a stepped surface, and several retaining teeth on its outer periphery. The socket end has an end face, a stepped surface, and several retaining teeth on its inner periphery. The end face and the stepped surface are mutually press-fitted, and the retaining teeth are mutually engaged. A heating wire is provided at one point on the stepped surface for fusing and fixing the end face and the stepped surface of adjacent pipe bodies.

[0007] The present invention is further configured such that a sealing groove is provided on the outer periphery of the socket end, and a sealing ring is embedded in the sealing groove; a sealing groove is provided on the inner periphery of the socket end, and the sealing groove and the sealing groove are adapted to each other.

[0008] The present invention is further configured such that the sealing ring can be embedded together in the sealing groove one and sealing groove two of the adjacent pipe body, for sealing the spigot end and the socket end.

[0009] The present invention is further configured such that the first sealing groove is located between the first toothed part and the first stepped surface, and the second sealing groove is located between the second toothed part and the second end face.

[0010] The present invention is further configured such that both the first and second locking teeth are annular structures, and the first and second locking teeth correspond one-to-one.

[0011] The present invention is further configured such that the first locking tooth includes a first locking surface, the first locking surface being disposed in the direction of the first stepped surface, and the second locking tooth includes a second locking surface, the second locking surface being disposed in the direction of the second stepped surface, and the first locking surface and the second locking surface abut against each other and are locked together.

[0012] The present invention is further configured such that a second heating wire is provided at one of the snap-fit ​​surfaces, and the second heating wire is used to fuse and fix the snap-fit ​​surfaces one and two of the adjacent tubes.

[0013] The present invention is further configured such that the first tooth portion further includes a first guide surface, the first guide surface being disposed in a direction away from the first stepped surface, and forming a tapered surface that gradually decreases in size in the direction away from the first stepped surface.

[0014] The present invention is further configured such that the second toothed part also includes a second guide surface, the second guide surface being disposed in the direction opposite to the second stepped surface, and forming a tapered surface that gradually expands in the direction opposite to the second stepped surface; the first guide surface and the second guide surface are used for tilting guidance during insertion.

[0015] The present invention is further configured such that the inner periphery of the second tooth portion has an arc-shaped chamfer between the second contact surface and the second guide surface.

[0016] This utility model also provides a connecting pipe socket structure, including two large-diameter electrofusion connecting pipes, which are fixed to each other by inserting the plug end and the socket end, and are fused together.

[0017] In summary, this utility model has the following beneficial effects:

[0018] By pre-embedding heating wires on the end faces of the pipes, two pipes can be fused together and fixed, facilitating pipe connection. By directly pre-embedding the heating wires at the spigot or socket end of the pipe, the heating wires and pipe are pre-processed into a single unit. No additional electrofusion fittings are needed during connection, enabling direct insertion and heat fusion of two large-diameter pipes, thus facilitating the connection of large-diameter pipes.

[0019] By setting multiple locking teeth between the spigot and socket ends of the pipe body, multiple locking and limiting mechanisms can be formed, thereby improving the stability of the locking and the sealing effect at the connection. Moreover, an electric heating wire is pre-embedded on the surface of the locking surface one. After the locking teeth one and locking teeth two are locked, the electric heating wire can be used for welding and fixing, forming multiple annular welding structures at the connection. On the one hand, this can improve the connection stability of the two pipe bodies, and on the other hand, it can form multiple annular sealing structures at the connection to improve the sealing performance of the pipe body connection.

[0020] The sealing ring can be embedded between sealing groove one and sealing groove two to form a sealed connection, thereby forming multiple seals to improve the sealing effect of the pipe connection. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a large-diameter electrofusion connection pipe in this embodiment;

[0022] Figure 2 This is a three-dimensional sectional view of a large-diameter electrofusion connection pipe in this embodiment;

[0023] Figure 3 This is a planar sectional view of a large-diameter electrofusion connection pipe in this embodiment;

[0024] Figure 4 This is a partial enlarged view of the spigot end and socket end in this embodiment;

[0025] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0026] Figure 6 for Figure 4 Enlarged view at point B in the middle;

[0027] Figure 7 This is a partial structural diagram of the two tubes connected in this embodiment.

[0028] Reference numerals: 1. Pipe body; 2. Inlet end; 21. End face 1; 221. Heating wire 1; 221. Stepped surface 1; 23. Locking tooth part 1; 231. Locking surface 1; 232. Heating wire 2; 233. Guide surface 1; 24. Sealing groove 1; 3. Socket end; 31. End face 2; 311. Welded part 1; 32. Stepped surface 2; 33. Locking tooth part 2; 331. Welded part 2; 332. Guide surface 2; 333. Chamfered part; 334. Sealing groove 2; 4. Sealing ring. Detailed Implementation

[0029] 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.

[0030] This embodiment discloses a large-diameter electrofusion connection pipe, referring to... Figures 1-7 As shown, the device includes a pipe body 1, with a spigot end 2 and a socket end 3 at each end. The spigot end 2 and the socket end 3 are interlocked and adapted to each other. Two adjacent pipe bodies 1 can be connected by interlocking the spigot end 2 and the socket end 3, thereby achieving a spigot-and-socket connection. After connection, they can be fused and fixed together, and a sealing ring 4 is used to achieve a seal.

[0031] An end face 21 is provided at the end of the socket end 2, and a stepped surface 22 is formed on the outer periphery of the socket end 2. The end face 21 and the stepped surface 22 face the same direction, and a plurality of retaining teeth 23 are formed on the outer periphery of the socket end 2. In this embodiment, the retaining teeth 23 have a ring structure and three are arranged side by side.

[0032] An end face 31 is provided at the end of the socket end 3, and a stepped surface 32 is formed on the inner circumference of the socket end 3. The end face 31 and the stepped surface 32 face the same direction. Several locking teeth 33 are formed on the inner circumference of the socket end 3. In this embodiment, the locking teeth 33 face the same shape and are arranged in three rows. The locking teeth 23 face the same as the locking teeth 33 face the same direction and can be locked together.

[0033] Two adjacent pipe bodies 1, with their spigot end 2 and socket end 3, are interlocked. End face 21 and stepped surface 32 are mutually abutted and adapted, forming two sets of abutting surfaces. This provides axial abutment support and positioning, thus maintaining the stability of the interlocking of the two pipe bodies 1. Furthermore, the locking teeth 23 and 33 are mutually engaged, locking the spigot end 2 and socket end 3 at the connection point, thus forming a stable and fixed connection.

[0034] Reference Figure 4 As shown, a heating wire 221 is installed at the stepped surface 22, and a corresponding welding portion 311 is formed at the end face 31. The positions of the welding portion 311 and the heating wire 221 correspond to each other. The heating wire 221 can be used to weld and fix the end face 31 and the stepped surface 22 of the adjacent tube body 1, and fix them by axial pressure, thereby welding and fixing the two tube bodies 1 together.

[0035] Reference Figures 4-7As shown, both the first locking tooth 23 and the second locking tooth 33 are annular structures, and the first locking tooth 23 and the second locking tooth 33 correspond one-to-one. After the two pipe bodies 1 are inserted into each other, a three-way locking structure can be formed between the spigot end 2 and the socket end 3, thereby forming a stable locking structure and maintaining the strength and stability of the pipe body connection.

[0036] Reference Figure 5 , Figure 6 As shown, the first locking tooth portion 23 includes a first locking surface 231, which is positioned towards the first stepped surface 22; the second locking tooth portion 33 includes a second locking surface 331, which is positioned towards the second stepped surface 32. After the insertion end 2 and the socket end 3 are inserted, the first locking surface 231 and the second locking surface 331 abut against each other and fit together, thereby forming an axial pressing limit.

[0037] Furthermore, a heating wire 232 is provided at the snap-fit ​​surface 231, and a matching welding portion 332 is formed at the snap-fit ​​surface 331. The heating wire 232 can weld and fix the stepped surface 22 and stepped surface 32 of the adjacent tube body 1, thereby forming a multi-layer welding and fixing structure at the snap-fit ​​position, forming multiple annular welding positions, which can improve the stability of the tube body 1 connection. Moreover, the multi-layer fixing and sealing structure can form an effective seal.

[0038] Reference Figures 4-6 As shown, the first locking tooth part 23 further includes a guide surface 233, which is positioned away from the stepped surface 22 and forms a tapered surface that gradually decreases in size in the direction away from the stepped surface 22. The second locking tooth part 33 further includes a guide surface 333, which is positioned away from the stepped surface 32 and forms a tapered surface that gradually increases in size in the direction away from the stepped surface 32. The guide surfaces 233 and 333 can provide tilting guidance during insertion, thereby enabling the first locking tooth part 23 and the second locking tooth part 33 to be locked and fixed, facilitating the insertion of the two tube bodies 1.

[0039] Reference Figure 6 , Figure 7 As shown, an arc-shaped chamfer 334 is formed on the inner circumference of the second locking tooth portion 33, corresponding to the locking surface 331 and the guide surface 333. The arc-shaped chamfer 334 can further guide the object, allowing for clearance at the chamfer and further arc-shaped guidance, facilitating the insertion and fixing of the two parts.

[0040] Reference Figure 4 , Figure 7As shown, a sealing groove 24 is formed on the outer periphery of the spigot end 2, and a sealing ring 4 is embedded in the sealing groove 24; in addition, a sealing groove 34 is formed on the inner periphery of the socket end 3, and the sealing groove 24 and the sealing groove 34 are mutually compatible. After the spigot end 2 and the socket end 3 are inserted and fixed together, the sealing ring 4 can be embedded in both the sealing groove 24 and the sealing groove 34 at the same time, thereby forming a further seal between the spigot end 2 and the socket end 3.

[0041] Reference Figure 4 As shown, sealing groove 24 is located between the retaining tooth portion 23 and the stepped surface 22, and sealing groove 34 is located between the retaining tooth portion 33 and the end face 31. The positions of sealing groove 24 and sealing groove 34 are matched to each other, thereby enabling them to be engaged to achieve sealing of the sealing ring.

[0042] This embodiment also discloses a connecting pipe socket structure, including two large-diameter electrofusion connecting pipes as described above. The two large-diameter electrofusion connecting pipes are connected and fixed to each other by inserting the plug end 2 and the socket end 3, and are fused together.

[0043] After the two large-diameter electrofusion connection pipes are inserted and fixed together, they are clamped and fixed by multiple toothed parts 23 and 33, and fused by multiple heating wires. This forms a multi-layer fusion sealing structure at the spigot end 2 and the socket end 3 to maintain the connection stability of the two pipe bodies 1. In addition, the sealing ring 4 can be embedded between the sealing groove 24 and the sealing groove 34 to form a sealed connection, thereby forming multiple seals to maintain the sealing effect of the pipe body 1 connection.

[0044] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A large-diameter electrically fused connecting pipe, comprising a pipe body (1), a spigot end (2) and a socket end (3) are arranged at two ends of the pipe body (1) respectively, the spigot end (2) and the socket end (3) are adapted to each other, characterized in that, an end face one (21) is arranged at an end of the spigot end (2), a stepped surface one (22) is formed on an outer periphery of the spigot end (2), and a plurality of clamping tooth portions one (23) are formed on the outer periphery of the spigot end (2); an end face two (31) is arranged at an end of the socket end (3), a stepped surface two (32) is formed on an inner periphery of the socket end (3), and a plurality of clamping tooth portions two (33) are formed on the inner periphery of the socket end (3); the end face one (21) and the stepped surface two (32) are adapted to each other by abutting, the end face two (31) and the stepped surface one (22) are adapted to each other by abutting, and the clamping tooth portions one (23) and the clamping tooth portions two (33) are adapted to each other by clamping; an electric heating wire one (221) is arranged at the stepped surface one (22), and is used for fusing and fixing the end face two (31) and the stepped surface one (22) of an adjacent pipe body (1); a sealing groove one (24) is formed on the outer periphery of the spigot end (2), a sealing ring (4) is embedded in the sealing groove one (24), a sealing groove two (34) is formed on the inner periphery of the socket end (3), and the sealing groove one (24) and the sealing groove two (34) are adapted to each other; the sealing ring (4) can be embedded in the sealing groove one (24) and the sealing groove two (34) of the adjacent pipe body (1) together, and is used for sealing the spigot end (2) and the socket end (3); the sealing groove one (24) is located between the clamping tooth portions one (23) and the stepped surface one (22), and the sealing groove two (34) is located between the clamping tooth portions two (33) and the end face two (31); the clamping tooth portions one (23) and the clamping tooth portions two (33) are annular structures, and the clamping tooth portions one (23) and the clamping tooth portions two (33) are one-to-one corresponding; the clamping tooth portions one (23) comprise a clamping surface one (231), the clamping surface one (231) is arranged towards the stepped surface one (22), the clamping tooth portions two (33) comprise a clamping surface two (331), the clamping surface two (331) is arranged towards the stepped surface two (32), and the clamping surface one (231) and the clamping surface two (331) are adapted to each other by abutting and clamping; an electric heating wire two (232) is arranged at the clamping surface one (231), and is used for fusing and fixing the clamping surface one (231) and the clamping surface two (331) of the adjacent pipe body (1); the clamping tooth portions one (23) further comprise a guide surface one (233), the guide surface one (233) is arranged away from the stepped surface one (22), and forms a tapered surface gradually narrowing away from the stepped surface one (22); the clamping tooth portions two (33) further comprise a guide surface two (333), the guide surface two (333) is arranged away from the stepped surface two (32), and forms a tapered surface gradually expanding away from the stepped surface two (32); and the guide surface one (233) and the guide surface two (333) are used for inclined guiding during the spigot and socket. ​ ​ ​ ​ 2. The large diameter electrofusion coupling pipe according to claim 1, wherein, ​ 3. The large diameter electrofusion coupling pipe according to claim 2, wherein, ​ 4. The large diameter electrofusion coupling pipe according to claim 2, wherein, ​ 5. The large diameter electrofusion coupling pipe according to claim 1, wherein, ​ 6. The large diameter electrofusion coupling pipe according to claim 1, wherein, ​ 7. The large diameter electrofusion coupling pipe according to claim 6, wherein, ​ 8. The large diameter electrofusion coupling pipe according to claim 6, wherein, ​ ​ 9. The large diameter electrofusion coupling pipe according to claim 8, wherein, A circular arc-shaped chamfer portion (334) is formed between the second engaging surface (331) and the second guide surface (333) on the inner periphery of the second tooth portion (33).

10. A spigot and socket joint for connecting pipes, characterised in that The application relates to a large-diameter electrically fused connecting pipe, which comprises two large-diameter electrically fused connecting pipes, and the two large-diameter electrically fused connecting pipes are fixedly connected with each other through spigot ends (2) and socket ends (3) and are fusedly fixed with each other.

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