Connecting piece for steel pipe and PCCP (prestressed concrete cylinder pipe)

Abstract

The utility model provides a steel pipe and PCCP pipe connecting piece which comprises a bell mouth connecting piece and a spigot connecting piece, the bell mouth connecting piece comprises a first flange plate, a bell mouth connecting pipe is fixed on one side of the first flange plate, a first connecting pipe is fixed on the other side of the first flange plate, and the spigot connecting piece comprises a second flange plate. A spigot connecting pipe is fixed to one side of the second flange plate, a second connecting pipe is fixed to the other side of the second flange plate, the socket connecting pipe is used for being connected with a spigot steel ring of the PCCP in a sleeved mode, the spigot connecting pipe is used for being inserted into a socket steel ring of the PCCP, and the first connecting pipe and the second connecting pipe are used for being connected with steel pipes in a sleeved mode respectively. The steel pipe is connected with the socket and the spigot of the PCCP through the prefabricated socket connecting piece and the prefabricated spigot connecting piece, the structure of the steel pipe does not need to be changed, the steel pipe does not deform, the stability and durability of the connecting position of the steel pipe and the PCCP are guaranteed, construction is convenient, and the engineering investment cost is low.

Description

Technical Field

[0001] The utility model relates to the technical field of water conservancy and hydropower engineering, in particular to a connecting piece of a steel pipe and a PCCP pipe. Background Art

[0002] PCCP pipe, that is, prestressed steel cylinder concrete pipe, has low investment, good durability, and easy construction. It is widely used in water supply projects. However, steel pipes are needed at pipeline bends, accessories, reducers, etc. The connection between the steel pipe and the PCCP pipe is very important. It needs to be watertight, have high connection durability, and adapt to pipeline deformation.

[0003] Socket-and-spigot connection and welding connection are usually adopted to connect steel pipe and PCCP pipe. Among them, the socket-and-spigot connection needs to customize the connecting steel pipe of matching size according to the socket size of PCCP pipe, so as to plug the steel pipe of specific size into the socket and spigot of PCCP pipe respectively. The welding connection directly welds the steel pipe to the socket and spigot steel ring of PCCP pipe respectively. The above connection methods need to customize the structural steel pipe and gradient pipe of specific size, which increases the project investment. In addition, the deformation characteristics and stiffness of PCCP pipe and steel pipe are greatly different, which is easy to cause deformation incoordination, which is not conducive to project safety. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies of the above-mentioned prior art and provide a steel pipe and PCCP pipe connector, which can solve the problem that direct connection between the steel pipe and the PCCP pipe is prone to deformation and has a high engineering investment cost.

[0005] To this end, the utility model adopts the following technical solutions:

[0006] A steel pipe and PCCP pipe connector, comprising a socket connector and a spigot connector, the socket connector comprising a first flange, a socket connecting pipe being fixed on one side of the first flange, and a first connecting pipe being fixed on the other side of the first flange, the spigot connector comprising a second flange, a spigot connecting pipe being fixed on one side of the second flange, and a second connecting pipe being fixed on the other side of the second flange, the socket connecting pipe being used to sleeve the spigot steel ring of the PCCP pipe, the spigot connecting pipe being used to insert the socket steel ring of the PCCP pipe, and the first connecting pipe and the second connecting pipe being used to weld subsequent steel pipes respectively.

[0007] On the basis of adopting the above technical solutions, the present invention can also adopt the following further technical solutions, or use these further technical solutions in combination:

[0008] The diameter of the first flange is the same as the outer diameter of the PCCP pipe.

[0009] An outer lining concrete structure is provided between the outer surface of the socket connection pipe and the first flange, and an annular first steel mesh structure is provided inside the outer lining concrete structure.

[0010] A first rib is fixed between the outer surface of the first connecting pipe and the first flange.

[0011] The diameter of the second flange is the same as the outer diameter of the PCCP pipe.

[0012] An inner lining concrete structure is provided between the inner side of the spigot connecting pipe and the second flange, and an annular second steel mesh structure is provided inside the inner lining concrete structure.

[0013] A second rib is fixed between the outer surface of the second connecting pipe and the second flange.

[0014] A third rib is fixed between the outer surface of the socket connecting pipe and the second flange.

[0015] Compared with the prior art, the utility model has the following advantages and beneficial effects: the socket and spigot of the steel pipe and the PCCP pipe are connected by prefabricated socket connectors and spigot connectors, without changing the steel pipe structure, and the steel pipe will not be deformed, thereby ensuring the stability and durability of the connection between the steel pipe and the PCCP pipe, and convenient construction and low engineering investment cost; the outer periphery of the socket connection pipe is provided with an outer lining concrete structure and a steel mesh structure, and the inner side of the spigot connection pipe is provided with an inner lining concrete structure and a second steel mesh structure, further ensuring the rigidity of the connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front structural schematic diagram of the socket connector of the present utility model.

[0017] Figure 2 It is a schematic cross-sectional structure diagram of the socket connector of the present utility model.

[0018] Figure 3 It is a front structural schematic diagram of the socket connector of the utility model.

[0019] Figure 4 It is a schematic cross-sectional structure diagram of the socket connector of the utility model.

[0020] Figure 5 It is a partial structural schematic diagram of the PCCP pipe of the utility model. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the technical solution of the present utility model, the preferred implementation scheme of the present utility model is described below in conjunction with specific embodiments. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent elements with the same or similar functions. However, it should be understood that the accompanying drawings are only used for illustrative purposes and cannot be understood as limitations on the present utility model. In order to better illustrate the present embodiment, some parts of the accompanying drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the accompanying drawings may be omitted, and the positional relationship described in the accompanying drawings is only used for illustrative purposes and cannot be understood as limitations on the present utility model.

[0022] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0023] The utility model provides a steel pipe and PCCP pipe connector, comprising a socket connector 1 and a spigot connector 2, the socket connector 1 comprising a first flange 11, a socket connecting pipe 12 being fixed to one side of the first flange 11, a first connecting pipe 13 being fixed to the other side of the first flange 11, the spigot connector 2 comprising a second flange 21, a spigot connecting pipe 22 being fixed to one side of the second flange 21, a second connecting pipe 23 being fixed to the other side of the second flange 21.

[0024] like Figure 1~Figure 3 As shown, the inner diameter of the first connecting pipe 13 is D, the inner diameter of the socket connecting pipe 12 is D1, the outer diameter of the first flange 11 is D2, the inner diameter of the second connecting pipe 23 is D3, the outer diameter of the second flange 21 is D4, the outer diameter of the socket connecting pipe 22 is D5, the inner diameter of the PCCP pipe is D6, the outer diameter of the socket steel ring of the PCCP pipe is D7, the outer diameter of the PCCP pipe is D8, and the inner diameter of the socket steel ring of the PCCP pipe is D9.

[0025] The socket connecting pipe 12 is used to sleeve the socket steel ring of the PCCP pipe, so the inner diameter D1 of the socket connecting pipe 12 is equivalent to the outer diameter D7 of the socket steel ring of the PCCP pipe. The socket connecting pipe 22 is used to insert the socket steel ring of the PCCP pipe, so the outer diameter D5 of the socket connecting pipe 22 is equivalent to the inner diameter D9 of the socket steel ring of the PCCP pipe. The first connecting pipe 13 and the second connecting pipe 23 are respectively used for welding steel pipes, so the inner diameter D of the first connecting pipe 13 is equal to the inner diameter D3 of the second connecting pipe 23 and both are equal to the inner diameter D6 of the PCCP pipe.

[0026] In this embodiment, the first connecting pipe 13 and the second connecting pipe 23 are both steel connecting pipes, the socket connecting pipe 12 is a socket steel ring connecting piece used in conjunction with the socket steel ring of the PCCP pipe, and the socket connecting pipe 22 is a socket steel ring connecting piece used in conjunction with the socket steel ring of the PCCP pipe.

[0027] One end of the socket connection pipe 12 is double-sided welded to the first flange 11, and the first connection pipe 13 is also double-sided welded to the first flange 11; one end of the socket connection pipe 22 is double-sided welded to the second flange 21, and the second connection pipe 23 is also double-sided welded to the second flange 21.

[0028] The diameter of the first flange 11 is the same as the outer diameter of the PCCP pipe, that is, D2 is equal to D8.

[0029] An outer lining concrete structure 14 is provided between the outside of the socket connection pipe 12 and the first flange 11 , and an annular first steel mesh structure 15 is provided inside the outer lining concrete structure 14 . The first steel mesh structure 15 is arranged inside the inner lining concrete structure 14 at a height of 1 / 3 of the lining thickness from the outer surface of the socket connection pipe 12 .

[0030] The thickness of the outer lining concrete structure 14 is the same as the first flange 11, that is, the outer diameter of the outer lining concrete structure 14 is equal to the outer diameter D2 of the first flange 11, that is, equal to the outer diameter D8 of the PCCP pipe. After the socket connecting pipe 12 is sleeved with the socket steel ring of the PCCP pipe, the gap between the first flange 11 and the PCCP pipe is filled by the outer lining concrete structure 14 and the first steel mesh structure 15 inside, ensuring the connection rigidity of the socket connector 1 and making the connection more stable and durable.

[0031] A first rib 16 is fixed between the outside of the first connecting pipe 13 and the first flange 11. The first rib 16 is a triangular rib. Several first ribs 16 are evenly distributed around the circumference of the first connecting pipe 13 and are respectively welded to the first connecting pipe 13 and the first flange 11 to increase the rigidity of the structure and play a role in reinforcement.

[0032] The diameter of the second flange 21 is the same as the outer diameter of the PCCP pipe, that is, D4 is equal to D8.

[0033] An inner lining concrete structure 24 is provided between the inner side of the spigot connection pipe 22 and the second flange 21 . An annular second steel mesh structure 25 is provided inside the inner lining concrete structure 24 . The second steel mesh structure 25 is fixed to the inner surface of the spigot connection pipe 22 by spot welding.

[0034] The inner diameter of the lining concrete structure 24 is equal to the inner diameter D6 of the PCCP pipe. After the spigot connection pipe 22 is inserted into the socket steel ring of the PCCP pipe, the height difference between the inner diameter of the spigot connection pipe 22 and the inner diameter of the PCCP pipe is filled by the lining concrete structure 24, thereby ensuring the connection rigidity of the spigot connector 2 and making the connection more stable and durable.

[0035] As mentioned above, the inner diameter D of the first connecting pipe 13 is equal to the inner diameter D3 of the second connecting pipe 23 and is equal to the inner diameter of the welded steel pipe. At the same time, the inner diameter D of the first connecting pipe 13 is also equal to the inner diameter D6 of the PCCP pipe. The central through holes of the first flange 11 and the second flange 21 that play a connecting role are also equal and equal to the inner diameter D6 of the PCCP pipe.

[0036] The second flange 21 has no holes except a central through hole at the center.

[0037] A second rib 26 is fixed between the outer surface of the second connecting pipe 23 and the second flange 21 . The second rib 26 is a triangular rib. A plurality of second ribs 26 are evenly distributed around the circumference of the second connecting pipe 23 and are welded to the second connecting pipe 23 and the second flange 21 , respectively.

[0038] A third rib 27 is fixed between the outer side of the spigot connection pipe 22 and the second flange 21 . The third rib 27 is a rectangular rib. Several third ribs 27 are evenly distributed around the spigot connection pipe 22 and are welded to the spigot connection pipe 22 and the second flange 21 , respectively.

[0039] The first rib 16, the second rib 26 and the third rib 27 are all used to increase the rigidity of the structure and play a role in reinforcement.

[0040] The words equal, same, and equivalent mentioned above all mean approximately equal within the range of allowed error.

[0041] The thickness of the first flange 11 and the second flange 21 can be selected according to the actual internal pressure and external pressure of the PCCP pipe.

[0042] The anti-corrosion, rust removal, weld inspection, etc. of the socket connector 1 and the plug connector 2 must comply with the requirements of the specifications. After the socket connector 1 and the plug connector 2 are respectively connected to the PCCP pipe, the gap at the connection is poured with cement mortar to seal the cover to ensure the stability of the structure.

[0043] A plurality of annular water-stopping grooves 28 are provided around the socket connection pipe 22 of the socket connection piece 2. The water-stopping grooves 28 are used to set water-stopping rubber to ensure the sealing of the connection.

[0044] The PCCP pipe's socket steel ring is also provided with a number of annular socket grooves around its circumference, which are also used to set water-stop rubber to ensure the sealing of the connection.

[0045] According to the description and drawings of the utility model, a person skilled in the art can easily manufacture or use a steel pipe and PCCP pipe connector of the utility model, and can produce the positive effects recorded in the utility model.

[0046] It should be noted that the terms "including" and "having" and any variations thereof in the specification and claims of the present utility model and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be an internal connection between two mechanisms, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0047] In the description of the present invention, it should be understood that the terms "one end", "the other end", "outside", "inside", "horizontal", "end", "length", "outer end", "left", "right" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the mechanism or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present invention. The terms "first" and "second" are also used only for the simplicity of description, and do not indicate or imply relative importance.

[0048] Furthermore, in practicing the claims of the present invention, those skilled in the art may understand and affect variations to the disclosed embodiments by studying the drawings, disclosure, and appended claims. In addition, in the claims and the specification, words such as "comprises", "comprising", etc. do not exclude other elements or steps, and non-plural nouns do not exclude their plural forms.

[0049] The above is only a preferred embodiment of the present invention and is not intended to limit the scope of implementation of the present invention. That is, all equivalent changes and modifications made according to the present invention are covered by the scope of the claims of the present invention and will not be listed one by one here.

Claims

1. A steel pipe and PCCP pipe connector, characterized in that: The invention comprises a bell connection piece (1) and a spigot connection piece (2), wherein the bell connection piece (1) comprises a first flange (11), a bell connection pipe (12) is fixed on one side of the first flange (11), and a first connection pipe (13) is fixed on the other side of the first flange (11); the spigot connection piece (2) comprises a second flange (21), a spigot connection pipe (22) is fixed on one side of the second flange (21), and a second connection pipe (23) is fixed on the other side of the second flange (21); the bell connection pipe (12) is used for sleeve-connecting the spigot steel ring of a PCCP pipe, and the spigot connection pipe (22) is used for inserting the bell steel ring of the PCCP pipe; the first connection pipe (13) and the second connection pipe (23) are respectively used for connecting steel pipes.

2. A steel pipe and PCCP pipe connector as claimed in claim 1, characterized in that: The diameter of the first flange (11) is the same as the outer diameter of the PCCP pipe.

3. A steel pipe and PCCP pipe connector as claimed in claim 1 or 2, characterized in that: An outer lining concrete structure (14) is provided between the outer surface of the socket connection pipe (12) and the first flange (11), and an annular first steel mesh structure (15) is provided inside the outer lining concrete structure (14).

4. A steel pipe and PCCP pipe connector as claimed in claim 1, characterized in that: A first rib plate (16) is fixed between the outer surface of the first connecting pipe (13) and the first flange (11).

5. A steel pipe and PCCP pipe connector as claimed in claim 1, characterized in that: The diameter of the second flange (21) is the same as the outer diameter of the PCCP pipe.

6. A steel pipe and PCCP pipe connector as claimed in claim 1, characterized in that: An inner lining concrete structure (24) is provided between the inner side of the spigot connection pipe (22) and the second flange (21), and an annular second steel mesh structure (25) is provided inside the inner lining concrete structure (24).

7. A steel pipe and PCCP pipe connector as claimed in claim 1, characterized in that: A second rib plate (26) is fixed between the outer surface of the second connecting pipe (23) and the second flange (21).

8. A steel pipe and PCCP pipe connector as claimed in claim 1, characterized in that: A third rib (27) is fixed between the outer surface of the socket connection pipe (22) and the second flange (21).

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