CN219530098U - Pipeline structure - Google Patents

Abstract

The utility model provides a pipe structure for replacing a damaged concrete water supply pipe, the concrete water supply pipe comprises a main body part and a first bell mouth arranged at a first end of the main body part, the first bell mouth is connected with a socket of the first water supply pipe, a second end of the main body part is connected with a second bell mouth of a second water supply pipe, the pipe structure comprises: a pipe body; the first joint is arranged at the first end of the pipeline main body and is in plug-in connection with the socket of the first water supply pipeline; and the second joint is arranged at the second end of the pipeline main body and is connected with the second socket in a plugging manner. The technical scheme of the utility model can effectively solve the problem that the whole reinforced concrete pipe is difficult to replace in the related technology.

Description

Pipeline structure

Technical Field

The utility model relates to the field of water supply pipeline restoration, in particular to a pipeline structure.

Background

The urban municipal water supply network belongs to a pressure pipeline, the water supply pressure is generally in the range of 0.24-0.4 Mpa, the early water supply network pipe generally adopts reinforced concrete pipes, gray iron pipes, carbon steel pipes and the like, the reinforced concrete pipes, the gray iron pipes and the like are gradually eliminated along with the continuous expansion of urban range and the increasing requirements of residents on water supply safety, and the new water supply pipelines such as nodular cast iron pipes, composite steel pipes, PE pipes and the like are replaced.

At present, most urban municipal pipelines in old urban areas of the whole country still mainly comprise reinforced concrete pipes, gray iron pipes, carbon steel pipes and the like, and especially the reinforced concrete pipes are aged seriously due to long service life (about 30 years), so that the pressure bearing capacity is greatly reduced, burst easily occurs after the pressure of a water supply network fluctuates greatly, the water supply guarantee capacity is greatly reduced due to frequent pipe burst, and normal water supply is influenced. If the aged reinforced concrete water supply pipeline is damaged in a large area, the original pipeline must be replaced entirely. In addition, as cities continue to develop, cross-work occurs between municipal roads, underground road-penetrating passages and other municipal facilities and reinforced concrete pipelines, and when the reinforced concrete pipelines must be transferred and rerouted, the reinforced concrete pipelines also need to be broken entirely.

Because the reinforced concrete pipe is formed by inserting one reinforced concrete pipe, the reinforced concrete pipe does not have elasticity and cannot be replaced by the reinforced concrete pipe with the same specification. At present, no finished pipe fitting for realizing quick replacement of the whole reinforced concrete pipeline exists in the market.

Disclosure of Invention

The utility model mainly aims to provide a pipeline structure to solve the problem that the whole reinforced concrete pipe is difficult to replace in the related art.

In order to achieve the above object, the present utility model provides a pipe structure for replacing a broken concrete water supply pipe including a main body portion and a first socket provided at a first end of the main body portion, the first socket being connected to a socket of the first water supply pipe, a second end of the main body portion being connected to a second socket of a second water supply pipe, the pipe structure comprising: a pipe body; the first joint is arranged at the first end of the pipeline main body and is in plug-in connection with the socket of the first water supply pipeline; and the second joint is arranged at the second end of the pipeline main body and is connected with the second socket in a plugging manner.

Further, the pipe body is welded to the first joint and the second joint, respectively.

Further, a first annular tapered surface is provided on the end face of the first end of the pipe body, the radial dimension of the first annular tapered surface gradually decreases in the direction close to the first joint, a second annular tapered surface is provided on the end face of the first joint facing the pipe body, the radial dimension of the second annular tapered surface gradually decreases in the direction close to the pipe body, and solder for welding the pipe body and the first joint is provided between the first annular tapered surface and the second annular tapered surface; and/or a third annular conical surface is arranged on the end surface of the second end of the pipeline main body, the radial dimension of the third annular conical surface gradually decreases in the direction close to the second joint, a fourth annular conical surface is arranged on the end surface of the second joint, which faces the pipeline main body, the radial dimension of the fourth annular conical surface gradually decreases in the direction close to the pipeline main body, and the welding flux for welding the pipeline main body and the second joint is arranged between the third annular conical surface and the fourth annular conical surface.

Further, the first joint includes a first small-diameter section that interfaces with the pipe body and a first large-diameter section that interfaces with the first water supply pipe, and the socket of the first water supply pipe is inserted in the first large-diameter section.

Further, the first joint further comprises a first annular plate connected between the first small-diameter section and the first large-diameter section and a first retainer ring arranged on the inner wall of the first large-diameter section, the first retainer ring is arranged at one end, far away from the first small-diameter section, of the first large-diameter section, a first oil hemp ring is arranged between the first annular plate and the first retainer ring, and the first oil hemp ring is wound on the periphery of the socket of the first water supply pipeline.

Further, the pipe structure further includes a first asbestos-cement layer disposed between the socket of the first water supply pipe and the first large-diameter section, the first asbestos-cement layer being located outside the first oil hemp ring.

Further, the first major diameter section has a length of between 100mm and 200mm, the first minor diameter section has a length of between 450mm and 550mm, the first minor diameter section has an inner diameter equal to the inner diameter of the main body portion, and the first major diameter section has an inner diameter 100mm to 200mm greater than the outer diameter of the socket of the first water supply pipe.

Further, the second joint includes a second small-diameter section that interfaces with the pipe body and a second large-diameter section that interfaces with the second water supply pipe, and the second socket is inserted in the second large-diameter section.

Further, the outer diameter of the second socket gradually increases in the direction approaching the second joint, the second joint further comprises a second annular plate connected between the second small-diameter section and the second large-diameter section and a second retainer ring arranged on the inner wall of the second large-diameter section, the second retainer ring is arranged in the middle of the second large-diameter section, a second oil hemp ring is arranged between the second annular plate and the second retainer ring, and the second oil hemp ring is wound around the periphery of the second socket; the pipe structure further includes a second asbestos-cement layer disposed between the second socket and the second large diameter section, the second asbestos-cement layer being located outside of the second oil hemp ring.

Further, the second major diameter section has a length of between 200mm and 300mm, the second minor diameter section has a length of between 450mm and 550mm, the second minor diameter section has an inner diameter equal to the inner diameter of the main body portion, and the second major diameter section has an inner diameter 100mm to 200mm greater than the maximum outer diameter of the second socket.

By applying the technical scheme of the utility model, the pipeline structure comprises the pipeline main body, and the first connector and the second connector which are respectively arranged at the two ends of the pipeline main body, when the concrete water supply pipeline is replaced, the first connector is connected with the socket of the first water supply pipeline, the second connector is connected with the second socket, and then the pipeline main body is connected between the first connector and the second connector, so that the replacement of the damaged concrete water supply pipeline can be realized, and the concrete water supply pipeline has the advantage of simplicity in operation. Therefore, the technical scheme of the utility model can effectively solve the problem that the whole reinforced concrete pipe is difficult to replace in the related technology.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

FIG. 1 shows a schematic cross-sectional view of a pipe body and a first fitting of an embodiment of a pipe structure according to the present utility model;

FIG. 2 shows an enlarged view of the pipe body and first fitting of FIG. 1 at A;

FIG. 3 shows a schematic cross-sectional view of a pipe body and a second fitting according to an embodiment of the pipe structure of the present utility model; and

fig. 4 shows an enlarged view of the pipe body and the second joint of fig. 3 at B.

Wherein the above figures include the following reference numerals:

10. a pipe body; 11. a first annular conical surface; 12. a third annular conical surface; 20. a first joint; 21. a second annular conical surface; 22. a first minor diameter section; 23. a first large diameter section; 24. a first annular plate; 25. a first retainer ring; 30. a second joint; 31. a fourth annular conical surface; 32. a second minor diameter section; 33. a second large diameter section; 34. a second annular plate; 35. and a second check ring.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present utility model. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

As shown in fig. 1 to 4, the pipe structure of the present embodiment is used for replacing a broken concrete water supply pipe including a main body portion and a first socket provided at a first end of the main body portion, the first socket being connected with a socket of the first water supply pipe, a second end of the main body portion being connected with a second socket of the second water supply pipe, the pipe structure including: a pipe body 10, a first joint 20 and a second joint 30. Wherein the first joint 20 is arranged at the first end of the pipeline main body 10 and is in plug connection with a socket of a first water supply pipeline; the second joint 30 is provided at the second end of the pipe body 10 and is connected with the second socket in a plugging manner.

By applying the technical scheme of the embodiment, the pipeline structure comprises the pipeline main body 10, and the first connector 20 and the second connector 30 which are respectively arranged at two ends of the pipeline main body 10, when the concrete water supply pipeline is replaced, the first connector 20 is connected with the socket of the first water supply pipeline, the second connector 30 is connected with the second socket, and then the pipeline main body 10 is connected between the first connector 20 and the second connector 30, so that the replacement of the damaged concrete water supply pipeline can be realized, and the concrete water supply pipeline replacing device has the advantage of simplicity in operation. Therefore, the technical scheme of the embodiment can effectively solve the problem that the whole reinforced concrete pipe is difficult to replace in the related technology.

Since the two ends of the concrete water supply pipe have different structures (one end is a socket and the other end is a spigot), the first joint 20 and the second joint 30 in this embodiment respectively wrap the spigot and the second socket of the concrete water supply pipe (i.e., the first water supply pipe and the second water supply pipe) at the two ends of the damaged concrete water supply pipe, so as to realize connection between the pipe structure and the first water supply pipe and the second water supply pipe. Specifically, the pipe body 10, the first joint 20, and the second joint 30 may be each directly manufactured from steel through operations such as rolling.

Wherein the pipe body 10 is welded to the first joint 20 and the second joint 30, respectively. The pipe body 10 and the first joint 20 and the pipe body 10 and the second joint 30 are connected by welding, respectively, and have the advantages of simple operation and reliable connection.

As shown in fig. 1 and 2, in the present embodiment, a first annular tapered surface 11 is provided on an end surface of a first end of a pipe body 10, a radial dimension of the first annular tapered surface 11 gradually decreases in a direction approaching a first joint 20, a second annular tapered surface 21 is provided on an end surface of the first joint 20 toward the pipe body 10, a radial dimension of the second annular tapered surface 21 gradually decreases in a direction approaching the pipe body 10, and solder for welding the pipe body 10 and the first joint 20 is provided between the first annular tapered surface 11 and the second annular tapered surface 21. After the pipeline main body 10 and the first joint 20 are butted together, the tip of the first annular conical surface 11 and the tip of the second annular conical surface 21 are oppositely arranged to form a groove structure with a triangular section, and when the pipeline main body 10 and the first joint 20 are welded, welding flux is piled in the groove structure, so that the connecting effect between the pipeline main body 10 and the first joint 20 can be ensured, and water seepage and the like are avoided.

As shown in fig. 3 and 4, in the present embodiment, the third annular tapered surface 12 is provided on the end surface of the second end of the pipe body 10, the radial dimension of the third annular tapered surface 12 gradually decreases in the direction approaching the second joint 30, the fourth annular tapered surface 31 is provided on the end surface of the second joint 30 toward the pipe body 10, the radial dimension of the fourth annular tapered surface 31 gradually decreases in the direction approaching the pipe body 10, and the solder for welding the pipe body 10 and the second joint 30 is provided between the third annular tapered surface 12 and the fourth annular tapered surface 31. After the pipeline main body 10 and the second joint 30 are butted together, the tip of the third annular conical surface 12 and the tip of the fourth annular conical surface 31 are oppositely arranged to form a groove structure with a triangular section, and when the pipeline main body 10 and the second joint 30 are welded, welding flux is piled in the groove structure, so that the connecting effect between the pipeline main body 10 and the second joint 30 can be ensured, and water seepage and the like are avoided.

As shown in fig. 1, the first joint 20 includes a first small-diameter section 22 that interfaces with the pipe body 10 and a first large-diameter section 23 that interfaces with a first water supply pipe, the socket of which is inserted in the first large-diameter section 23. When the connection between the pipeline structure and the first water supply pipeline is carried out, the socket of the first water supply pipeline is firstly inserted into the first large-diameter section 23, and then the connection between the first joint 20 and the first water supply pipeline is carried out, so that the device has the advantages of simplicity in operation and reliability in connection. Specifically, the first small diameter section 22 and the first large diameter section 23 are each formed of rolled steel material having a thickness of 6mm to 10mm, and the thickness of the steel material may be selected depending on the caliber of the main body portion of the concrete water supply pipe at the time of specific construction.

As shown in fig. 1, the first joint 20 further includes a first annular plate 24 connected between the first small-diameter section 22 and the first large-diameter section 23, and a first retainer ring 25 provided on an inner wall of the first large-diameter section 23, the first retainer ring 25 being provided at an end of the first large-diameter section 23 remote from the first small-diameter section 22, a first oil hemp ring being provided between the first annular plate 24 and the first retainer ring 25, the first oil hemp ring being wound around an outer periphery of the socket of the first water supply pipe. Specifically, the first annular plate 24 is an annular steel plate structure, and the first retainer ring 25 is formed by winding a steel ring with a diameter of 10 mm. The first oil hemp ring is arranged between the outer surface of the socket of the first water supply pipeline and the inner surface of the first large-diameter section 23, so that the water seepage prevention effect can be achieved, and water is prevented from leaking out from the gap between the first water supply pipeline and the first joint 20. The first oil hemp ring is arranged between the first check ring 25 and the first annular plate 24, and the first check ring 25 can form a barrier for the first oil hemp ring, so that the effect that the leakage prevention is influenced by the flushing of the first oil hemp ring from the first water supply pipeline to the first joint 20 by water flow can be effectively avoided.

Specifically, in the present embodiment, the pipe structure further includes a first asbestos cement layer disposed between the socket of the first water supply pipe and the first large-diameter section 23, the first asbestos cement layer being located outside the first oil doughnut. After the first joint 20 is abutted with the first water supply pipeline, a first asbestos cement layer is wrapped between the first joint 20 and the first water supply pipeline, so that the water seepage prevention effect can be further guaranteed, the first oil hemp layer is prevented from being flushed out of a gap between a socket of the first water supply pipeline and the first large-diameter section 23 under the action of water pressure, and meanwhile, the connection stability between the first water supply pipeline and the first joint 20 is guaranteed.

Specifically, when the first joint 20 is connected with the first water supply pipeline, the socket of the first water supply pipeline is inserted into the first large-diameter section 23, then the gap between the first water supply pipeline and the first large-diameter section is filled with first oil hemp to form a first oil hemp ring, then a first asbestos cement layer is arranged on the outer side of the first oil hemp ring, and water can be recovered after curing for 4 hours. The "disposing the first asbestos-cement layer on the outer side of the first oil-filled ring" mentioned above refers to disposing the first asbestos-cement layer on the side of the first oil-filled ring away from the first ring plate 24.

In this embodiment, the length of the first large diameter section 23 is between 100mm and 200mm, ensuring a sufficiently long abutting length between the first joint 20 and the first water supply pipe; the length of the first minor diameter section 22 is between 450mm and 550 mm; the inner diameter of the first small-diameter section 22 is equal to that of the main body part, and correspondingly, the inner diameter of the pipeline main body 10 is also equal to that of the main body part, so that the pipe diameter of the pipeline structure is ensured to be consistent with that of the original concrete water supply pipeline; the first large diameter section 23 has an inner diameter 100mm to 200mm larger than the outer diameter of the spigot of the first water supply pipe, reserving space for the first oil doughnut.

As shown in fig. 3, the second joint 30 includes a second small-diameter section 32 that interfaces with the pipe body 10 and a second large-diameter section 33 that interfaces with the second water supply pipe, and the second socket is inserted in the second large-diameter section 33. When the connection between the pipeline structure and the second water supply pipeline is carried out, the second socket of the second water supply pipeline is inserted into the second large-diameter section 33, and then the connection between the second joint 30 and the first water supply pipeline is carried out, so that the connection device has the advantages of simplicity in operation and reliability in connection. Specifically, the second small diameter section 32 and the second large diameter section 33 are each formed of rolled steel material having a thickness of 6mm to 10mm, and the thickness of the steel material may be selected depending on the caliber of the main body portion of the concrete water supply pipe at the time of specific construction.

As shown in fig. 3, the outer diameter of the second socket gradually increases in a direction approaching the second joint 30, the second joint 30 further includes a second ring plate 34 connected between the second small-diameter section 32 and the second large-diameter section 33, and a second retainer ring 35 provided on an inner wall of the second large-diameter section 33, the second retainer ring 35 being provided in a middle portion of the second large-diameter section 33, a second oil hemp ring being provided between the second ring plate 34 and the second retainer ring 35, the second oil hemp ring being wound around an outer circumference of the second socket. Specifically, the second annular plate 34 is an annular steel plate structure, and the second retainer ring 35 is formed by winding a steel ring with a diameter of 10 mm. The second oil hemp ring is arranged between the outer surface of the second bell mouth of the second water supply pipeline and the inner surface of the second large-diameter section 33, so that the water seepage prevention effect can be achieved, and water is prevented from leaking out from the gap between the second water supply pipeline and the second joint 30. The second oil hemp ring is arranged between the second check ring 35 and the second annular plate 34, and the second check ring 35 can form a barrier for the second oil hemp ring, so that the effect that the second oil hemp ring is impacted by water flow from the second water supply pipeline to the second joint 30 to influence the leakage prevention can be effectively avoided.

It should be noted that, the "middle portion of the second large diameter section 33" mentioned above refers to a middle position of the second large diameter section 33, and the length of 1/3 of the middle portion of the second large diameter section 33 may be understood as "middle portion of the second large diameter section 33". Since the second socket is constructed such that the outer diameter gradually increases in a direction approaching the second joint 30, if the second retainer ring 35 is provided at the free end (i.e., leftmost end in fig. 3) of the second large-diameter section 33, the radial gap between the second retainer ring 35 and the second socket is excessively large, and the second hemp ring is easily washed out by the water flow. In the present embodiment, the second retainer ring 35 is provided in the middle of the second large diameter section 33 to effectively block the second oil doughnut.

Specifically, the pipe structure further includes a second asbestos cement layer disposed between the second socket and the second large-diameter section 33, the second asbestos cement layer being located outside of the second oil ring. After the second joint 30 is abutted with the second water supply pipeline, a second asbestos cement layer is arranged between the second joint 30 and the second water supply pipeline, so that the water seepage prevention effect can be further ensured, the second oil hemp layer is prevented from being flushed out of a gap between the second socket of the second water supply pipeline and the second large-diameter section 33 under the action of water pressure, and meanwhile, the connection stability between the second socket and the second large-diameter section is ensured.

Specifically, when the second joint 30 is connected with the second water supply pipeline, the second socket of the second water supply pipeline is inserted into the second large-diameter section 33, then the gap between the second socket and the second large-diameter section is filled with second oil hemp to form a second oil hemp ring, then a second asbestos cement layer is arranged on the outer side of the second oil hemp ring, and water can be recovered after curing for 4 hours.

The "disposing the second asbestos cement layer on the outer side of the second oil ring" mentioned above refers to disposing the second asbestos cement layer on the side of the second oil ring remote from the second ring plate 34.

In this embodiment, the length of the second large diameter section 33 is between 200mm and 300mm, ensuring a sufficiently long abutting length between the second joint 30 and the second water supply pipe; the second minor diameter section 32 has a length between 450mm and 550 mm; the inner diameter of the second small-diameter section 32 is equal to the inner diameter of the main body part, and correspondingly, the inner diameter of the pipeline main body 10 is also equal to the inner diameter of the main body part, so that the pipe diameter of the pipeline structure is ensured to be consistent with that of the original concrete water supply pipeline; the second large diameter section 33 has an inner diameter 100mm to 200mm greater than the maximum outer diameter of the second socket, and is provided with a space for the second oil doughnut.

By applying the technical scheme of the embodiment, the pipeline structure is formed by adopting the steel plate as the raw material, rolling, butt welding, splicing welding and the like and processing the steel plate on site according to the size of a damaged concrete water supply pipeline, and the oil flax, the asbestos cement and the steel plate are all easily obtained materials.

In the description of the present utility model, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present utility model; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present utility model.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. A pipeline structure for replacing a broken concrete water supply pipeline, the broken concrete water supply pipeline including a main body portion and a first socket disposed at a first end of the main body portion, the first socket being connected with a socket of a first water supply pipeline, a second end of the main body portion being connected with a second socket of a second water supply pipeline, the pipeline structure comprising:

a pipe body (10);

a first joint (20) arranged at a first end of the pipeline main body (10) and connected with a socket of the first water supply pipeline in a plugging manner;

and a second joint (30) which is arranged at the second end of the pipeline main body (10) and is connected with the second socket in a plugging way.

2. The pipe structure according to claim 1, characterized in that the pipe body (10) is welded to the first joint (20) and the second joint (30), respectively.

3. A pipe structure as claimed in claim 2, wherein,

a first annular conical surface (11) is arranged on the end surface of the first end of the pipeline main body (10), the radial dimension of the first annular conical surface (11) gradually decreases in the direction close to the first joint (20), a second annular conical surface (21) is arranged on the end surface of the first joint (20) towards the pipeline main body (10), the radial dimension of the second annular conical surface (21) gradually decreases in the direction close to the pipeline main body (10), and the welding flux for welding the pipeline main body (10) and the first joint (20) is arranged between the first annular conical surface (11) and the second annular conical surface (21); and/or the number of the groups of groups,

be provided with third annular conical surface (12) on the terminal surface of the second end of pipeline main part (10), in being close to in the direction of second joint (30), the radial dimension of third annular conical surface (12) reduces gradually, second joint (30) orientation be provided with fourth annular conical surface (31) on the terminal surface of pipeline main part (10), in being close to in the direction of pipeline main part (10), the radial dimension of fourth annular conical surface (31) reduces gradually, is used for the welding pipeline main part (10) with the solder setting of second joint (30) is in between third annular conical surface (12) with fourth annular conical surface (31).

4. A pipe structure according to any one of claims 1 to 3, characterized in that the first joint (20) comprises a first small diameter section (22) which interfaces with the pipe body (10) and a first large diameter section (23) which interfaces with the first water supply pipe, the spigot of the first water supply pipe being inserted within the first large diameter section (23).

5. The pipe structure according to claim 4, characterized in that the first joint (20) further comprises a first ring plate (24) connected between the first small diameter section (22) and the first large diameter section (23) and a first retainer ring (25) provided on an inner wall of the first large diameter section (23), the first retainer ring (25) being provided at an end of the first large diameter section (23) remote from the first small diameter section (22), a first oil collar being provided between the first ring plate (24) and the first retainer ring (25), the first oil collar being provided around an outer circumference of the socket of the first water supply pipe.

6. A pipe structure according to claim 5, characterized in that the pipe structure further comprises a first asbestos cement layer arranged between the socket of the first water supply pipe and the first large diameter section (23), the first asbestos cement layer being located outside the first oil collar.

7. A pipe structure according to claim 4, characterized in that the length of the first large diameter section (23) is between 100mm and 200mm, the length of the first small diameter section (22) is between 450mm and 550mm, the inner diameter of the first small diameter section (22) is equal to the inner diameter of the main body portion, and the inner diameter of the first large diameter section (23) is 100mm to 200mm larger than the outer diameter of the socket of the first water supply pipe.

8. A pipe structure according to any one of claims 1 to 3, wherein the second joint (30) comprises a second small diameter section (32) which interfaces with the pipe body (10) and a second large diameter section (33) which interfaces with the second water supply pipe, the second socket being interposed within the second large diameter section (33).

9. The piping structure according to claim 8, wherein,

the outer diameter of the second socket is gradually increased in the direction approaching the second joint (30), the second joint (30) further comprises a second annular plate (34) connected between the second small-diameter section (32) and the second large-diameter section (33) and a second check ring (35) arranged on the inner wall of the second large-diameter section (33), the second check ring (35) is arranged in the middle of the second large-diameter section (33), a second oil hemp ring is arranged between the second annular plate (34) and the second check ring (35), and the second oil hemp ring is wound on the periphery of the second socket;

the pipe structure further comprises a second asbestos cement layer arranged between the second socket and the second large-diameter section (33), the second asbestos cement layer being located outside the second oil hemp ring.

10. A pipe structure according to claim 8, characterized in that the length of the second large diameter section (33) is between 200mm and 300mm, the length of the second small diameter section (32) is between 450mm and 550mm, the inner diameter of the second small diameter section (32) is equal to the inner diameter of the main body portion, and the inner diameter of the second large diameter section (33) is 100mm to 200mm larger than the largest outer diameter of the second socket.