Connecting device for PCCP (prestressed concrete cylinder pipe)

Abstract

The utility model provides a connecting device for a PCCP (prestressed concrete cylinder pipe). The connecting device comprises a pipeline to be connected, a sealing ring and a tightening piece, the end part of the to-be-connected pipeline is an outer ring pipeline, the outer wall of the outer ring pipeline is provided with a plurality of connecting blocks, the connecting blocks are connected with the connecting blocks arranged on the adjacent outer ring pipeline, the sealing ring is arranged between the adjacent outer ring pipelines, and the tightening piece is sleeved in the outer ring pipeline of the adjacent to-be-connected pipeline and is connected with the two outer ring pipelines. The sealing performance of the connecting position of the pipelines to be connected can be guaranteed, and the bonding strength of the connecting position is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline connection, in particular to a connection device for PCCP pipelines. Background Art

[0002] PCCP prestressed pipes are used in long-distance water transmission, power plant return water, and urban water supply. Existing PCCP prestressed pipe connections are complex to install and rely solely on sealing rings and friction. Furthermore, the joint strength of the PCCP prestressed pipes is insufficient. Once the two PCCP prestressed pipes shift or loosen, the sealing function cannot be guaranteed, affecting the performance of the PCCP prestressed pipes.

[0003] The utility model with publication number CN214999964U discloses a prestressed steel cylinder concrete pipe socket connector, comprising a first pipe body connector, a middle connector, and a second pipe body connector; the first pipe body connector has a first flat end and a first pointed end, the first flat end being connected to the first pipe body; the second pipe body connector has a second flat end and a second pointed end, the second flat end being connected to the second pipe body; the two ends of the middle connector respectively have a first socket and a second socket extending outward, the first socket being connected to the first pointed end of the first pipe body connector, and the second socket being connected to the second pointed end of the second pipe body connector. However, the above-mentioned prestressed steel cylinder concrete pipe socket connector requires ensuring that the front and back order of the two pipes is correct before connection, and ensuring that the socket is inserted into the socket. The installation is complicated and inefficient, and it is also easy to cause pipe damage due to misalignment of angles. Utility Model Content

[0004] The purpose of the utility model is to solve the defects in the prior art and provide a connecting device for PCCP pipes, thereby ensuring the sealing of the connection between the pipes to be connected and improving the bonding strength of the connection.

[0005] To achieve the above-mentioned object, the utility model provides a connection device for PCCP pipes, comprising a pipe to be connected, a sealing ring and a clamp;

[0006] The ends of the pipes to be connected are outer ring pipes, and the outer walls of the outer ring pipes are provided with a plurality of connecting blocks, which are connected to the connecting blocks provided on the adjacent outer ring pipes. The sealing rings are provided between the adjacent outer ring pipes, and the tightening members are sleeved in the outer ring pipes of the adjacent pipes to be connected, and are both connected to the two outer ring pipes.

[0007] First place the first pipe to be connected, then put the sealing ring on the outer ring pipe of the pipe to be connected, fix the sealing ring through the friction between the inner wall of the sealing ring and the outer ring pipe, and put one end of the tightening piece into the outer ring pipe.

[0008] The second pipe to be connected is placed, and the other end of the clamp is inserted into the outer pipe of the second pipe to be connected, and the second pipe to be connected is aligned with the first pipe to be connected. The outer walls of the outer pipes of the first pipe to be connected and the second pipe to be connected are each provided with a plurality of connecting blocks. The connecting blocks are connected with the connecting blocks provided on the adjacent outer pipes, so that the second pipe to be connected is aligned with the first pipe to be connected, and the outer pipes of the two pipes to be connected are connected together, with the sealing ring located between the two pipes to be connected. After the two pipes to be connected are connected, the clamp is connected to the two outer pipes respectively, making the connection between the two pipes to be connected more tightly and improving the bonding strength of the connection.

[0009] In this invention, due to the presence of the sealing ring, the pressure exerted on both sides of the pipes to be connected actually acts on the sealing ring, which firstly acts as a buffer to protect the pipe openings of the two pipes to be connected from damage. Secondly, the pipe openings of the two pipes to be connected are more tightly connected to the sealing ring, thereby enhancing the sealing performance of the pipe connection. In addition, a tightening member is also provided inside the two outer pipes to further tighten the connection between the two pipes to be connected.

[0010] Optionally, the sealing ring includes a positioning ring, one end of which is sleeved on the outer ring pipe, and the other end of which is provided with a sealing ring extending toward the center of the circle along its radial direction, and the sealing ring is located between adjacent outer ring pipes.

[0011] The inner and outer diameters of the sealing ring are consistent with those of the outer pipe to achieve waterproofing. The locating ring is then placed on the outer pipe of one of the pipes to be connected. When the two are connected through the pipes to be connected, the sealing ring is located between the outer pipes of the two pipes to be connected, thereby enhancing the sealing of the connection.

[0012] Optionally, a positioning hole is provided on the positioning ring, and the positioning hole matches the connecting block.

[0013] The positioning ring is provided with a positioning hole corresponding to the connecting block. The positioning ring is sleeved on the outside of the connecting block through the positioning hole to limit the sealing ring and prevent the sealing ring from falling out of the pipe to be connected.

[0014] Optionally, the connecting block is connected to a connecting block provided on an adjacent outer ring pipe via a bolt assembly.

[0015] Optionally, the bolt assembly includes a first bolt and a nut, and the first bolt passes through two connecting blocks and is connected to the nut.

[0016] Put the positioning ring outside the connecting block, install the first bolt so that the positioning ring is stuck between the first bolt and the outer ring pipe, so as to prevent the positioning ring from falling out of the connecting block, and use the first bolt to pass through the two connecting blocks respectively arranged on the adjacent outer ring pipes and connect them with the nut to realize the connection of the adjacent outer ring pipes.

[0017] Optionally, a gasket is provided between the first bolt and the connecting block to reduce wear of the connecting block during installation of the first bolt.

[0018] Optionally, the gasket is made of rubber, stainless steel or high carbon steel.

[0019] Optionally, the outer ring pipe is provided with a plurality of first threaded holes, and the clamping member is correspondingly provided with a plurality of second threaded holes.

[0020] Optionally, the inner diameter of the outer ring pipe is larger than the inner diameter of the pipe to be connected.

[0021] Beneficial effects:

[0022] The utility model comprises pipes to be connected, a sealing ring and a clamping piece. The first pipe to be connected is placed first, and then the sealing ring is put on the outer ring pipe of the pipe to be connected. The sealing ring is fixed by the friction between the inner wall of the sealing ring and the outer ring pipe, and one end of the clamping piece is put into the outer ring pipe.

[0023] The second pipe to be connected is placed, and the other end of the clamp is inserted into the outer pipe of the second pipe to be connected, and the second pipe to be connected is aligned with the first pipe to be connected. The outer walls of the outer pipes of the first pipe to be connected and the second pipe to be connected are each provided with a plurality of connecting blocks. The connecting blocks are connected with the connecting blocks provided on the adjacent outer pipes, so that the second pipe to be connected is aligned with the first pipe to be connected, and the outer pipes of the two pipes to be connected are connected together, with the sealing ring located between the two pipes to be connected. After the two pipes to be connected are connected, the clamp is connected to the two outer pipes respectively, making the connection between the two pipes to be connected more tightly and improving the bonding strength of the connection.

[0024] In this utility model, due to the presence of the sealing ring, the pressure exerted on both sides of the pipes to be connected actually acts on the sealing ring, which firstly acts as a buffer to protect the pipe openings of the two pipes to be connected from damage. Secondly, the pipe openings of the two pipes to be connected are more tightly connected to the sealing ring, thereby enhancing the sealing performance of the pipe connection. In addition, a tightening member is also provided inside the two outer pipes, which makes the connection between the two pipes to be connected even tighter and improves the bonding strength of the connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the implementation methods or the description of the prior art. Obviously, the drawings described below are only some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0026] Figure 1 This is a structural diagram of the connection device for PCCP pipes disclosed in the present utility model;

[0027] Figure 2 This is a structural diagram of the pipes to be connected in the connecting device for PCCP pipes disclosed in the present utility model;

[0028] Figure 3 This is a structural diagram of another pipe to be connected with the connecting device for PCCP pipe disclosed in the present utility model;

[0029] Figure 4 This is a structural diagram of a sealing ring in a connection device for a PCCP pipe disclosed in the present utility model;

[0030] Figure 5 This is a structural diagram of a tightening member in a connection device for PCCP pipes disclosed in the present utility model.

[0031] Reference numerals:

[0032] Label name Label name 1 Pipes to be connected 23 sealing ring 11 Outer ring pipe 3 Bolt assembly 12 Connection Block 31 First Bolt 13 First threaded hole 32 Nut 2 sealing ring 4 Tightening parts 21 Positioning ring 41 Second threaded hole 22 Positioning hole 42 Second bolt

[0033] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0036] In the description of the present invention, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the exemplary expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0037] See also Figure 1-5 According to an embodiment of the present invention, a connecting device for a PCCP pipe includes a pipe to be connected 1, a sealing ring 2 and a clamp 4;

[0038] The end of the pipe 1 to be connected is an outer ring pipe 11, and a plurality of connecting blocks 12 are provided on the outer wall of the outer ring pipe 11. The connecting block 12 is connected to the connecting block 12 provided on the adjacent outer ring pipe 11. The sealing ring 2 is provided between the adjacent outer ring pipes 11, and the tightening member 4 is sleeved in the outer ring pipe 11 of the adjacent pipes 1 to be connected, and both are connected to the two outer ring pipes 11.

[0039] Specifically, first place the first pipe to be connected, then put the sealing ring 2 on the outer ring pipe 11 of the pipe to be connected 1, fix the sealing ring 2 by the friction between the inner wall of the sealing ring 2 and the outer ring pipe 11, and put one end of the tightening member 4 into the outer ring pipe 11.

[0040] Place the second pipe to be connected, insert the other end of the fastening member 4 into the outer ring pipe 11 of the second pipe to be connected, and align the second pipe to be connected with the first pipe to be connected. The outer walls of the outer ring pipes 11 of the first pipe 1 and the second pipe 1 to be connected are both provided with multiple connecting blocks 12. Connect the connecting blocks 12 with the connecting blocks 12 provided on the adjacent outer ring pipes 11, align the second pipe 1 to be connected with the first pipe 1 to be connected, and connect the outer ring pipes 11 of the two pipes 1 to be connected together, with the sealing ring 2 located between the two pipes 1 to be connected. After the two pipes 1 to be connected are connected, the fastening member 4 is connected to the two outer ring pipes 11 respectively, making the connection between the two pipes 1 to be connected tighter and improving the bonding strength of the connection.

[0041] In the present invention, due to the presence of the sealing ring 2, the pressure exerted on both sides of the pipes 1 to be connected actually acts on the sealing ring 2, which firstly acts as a buffer to protect the pipe openings of the two pipes 1 to be connected from damage. Secondly, the pipe openings of the two pipes 1 to be connected are more tightly bonded to the sealing ring 2, thereby enhancing the sealing performance of the connection of the pipes 1 to be connected. In addition, a tightening member 4 is also sleeved inside the two outer pipes 11, thereby making the connection between the two pipes 1 to be connected even tighter and improving the bonding strength of the connection.

[0042] See also Figure 4 In some embodiments of the present invention, the sealing ring 2 includes a positioning ring 21, one end of the positioning ring 21 is sleeved on the outer ring pipe 11, and the other end is provided with a sealing ring 23 extending toward the center of the circle along its radial direction. The sealing ring 23 is located between adjacent outer ring pipes 11.

[0043] In this embodiment, the inner and outer diameters of the sealing ring 23 are consistent with those of the outer pipe 11 to achieve waterproofing. The positioning ring 21 is then inserted into the outer pipe 11 of one of the pipes 1 to be connected. When the two pipes 1 are connected, the sealing ring 23 is positioned between the outer pipes 11 of the two pipes 1 to be connected, enhancing the sealing performance of the connection.

[0044] See also Figure 4 In some embodiments of the present invention, a positioning hole 22 is provided on the positioning ring 21 , and the positioning hole 22 matches the connecting block 12 .

[0045] In this embodiment, a positioning hole 22 corresponding to the connecting block 12 is provided on the positioning ring 21. The positioning ring 21 is sleeved on the outside of the connecting block 12 through the positioning hole 22 to limit the sealing ring 2 and prevent the sealing ring 2 from falling out of the pipe 1 to be connected.

[0046] See also Figure 1-3 In some embodiments of the present invention, the connecting block 12 is connected to the connecting block 12 provided on the adjacent outer ring pipe 11 by a bolt assembly 3.

[0047] In this embodiment, a connecting block 12 is cast on the outside of the outer ring pipe 11, and a through hole is opened on the connecting block 12. An outer ring pipe 11 is provided at both ends of the pipe 1 to be connected, and each outer ring pipe 11 is provided with two connecting blocks 12. The number of connecting blocks 12 can be adjusted according to demand.

[0048] The connecting block 12 is cut from a cylinder, with the axis of the connecting block 12 coinciding with the generatrix of the outer pipe 11 opening. The portion of the cylinder outside the outer pipe 11 opening is retained to form the connecting block 12, while the portion inside the outer pipe 11 opening is cut. If a tangent line is drawn to the circle of the outer pipe 11, with the point where the center of the circle corresponding to the connecting block 12 coincides with the outer pipe 11 as the tangent point, the center of the circle corresponding to the through hole should be on the perpendicular bisector of this tangent line, and the distance from the center of the circle corresponding to the through hole to the perpendicular bisector should be half the radius of the cylinder.

[0049] The two connecting blocks 12 arranged on one outer ring pipe 11 are symmetrical about the center of the outer ring pipe 11, and one side surface of the connecting block 12 is on the same plane as the end surface of the outer ring pipe 11. The axes of the two connecting blocks 12 arranged on the same side of the two outer ring pipes 11 set on the same pipe 1 to be connected should be kept coincident.

[0050] See also Figure 2 and 3 In some embodiments of the present invention, the bolt assembly 3 includes a first bolt 31 and a nut 32 , and the first bolt 31 passes through two connecting blocks 12 and is connected to the nut 32 .

[0051] In this embodiment, the positioning ring 21 is put on the outside of the connecting block 12, and the first bolt 31 is installed so that the positioning ring 21 is stuck between the first bolt 31 and the outer ring pipe 11, which can prevent the positioning ring 21 from falling out of the connecting block 12. The first bolt 31 is passed through the two connecting blocks respectively arranged on the adjacent outer ring pipes 11 and connected to the nut 32 to achieve the connection of the adjacent outer ring pipes 11.

[0052] See also Figure 2 and 3 In some embodiments of the present invention, a gasket (not shown) is provided between the first bolt 31 and the connecting block 12 to reduce the wear of the connecting block 12 during the installation of the first bolt 31 .

[0053] In some embodiments of the present invention, the gasket is made of rubber, stainless steel or high carbon steel.

[0054] See also Figure 2 、 3 and 5. In some embodiments of the present invention, the outer ring pipe 11 is provided with a plurality of first threaded holes 13, and the fastening member 4 is correspondingly provided with a plurality of second threaded holes 41.

[0055] In this embodiment, the inner wall of the outer pipe 11 is provided with 16 first threaded holes 13, and the clamping member 4 is provided with two rows of second threaded holes 41. The clamping member 4 is connected to the two outer pipes 11 through the two rows of second threaded holes 41. The position and number of the second threaded holes 41 in each row correspond to the position and number of the first threaded holes 13. Second bolts 42 pass through the second threaded holes 41 and connect with the first threaded holes 13, securing the clamping member 4 to the outer pipe 11 and providing a tighter connection between the two pipes 1 to be connected. The clamping member 4 is made of stainless steel.

[0056] See also Figure 2 and 3 In some embodiments of the present invention, the inner diameter of the outer ring pipe 11 is larger than the inner diameter of the pipe to be connected 1. The pipe to be connected 1 and the outer ring pipe 11 can be integrally cast during the preparation process.

[0057] The above are only preferred embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the practical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A connection device for PCCP pipes, characterized in that: Including pipes to be connected, sealing rings and fastening parts; The ends of the pipes to be connected are outer ring pipes, and the outer walls of the outer ring pipes are provided with a plurality of connecting blocks, which are connected to the connecting blocks provided on the adjacent outer ring pipes. The sealing rings are provided between the adjacent outer ring pipes, and the tightening members are sleeved in the outer ring pipes of the adjacent pipes to be connected, and are both connected to the two outer ring pipes.

2. The connection device for PCCP pipe according to claim 1, characterized in that: The sealing ring includes a positioning ring, one end of which is sleeved on the outer ring pipe, and the other end of which is provided with a sealing ring extending toward the center of the circle along its radial direction. The sealing ring is located between adjacent outer ring pipes.

3. The connection device for PCCP pipe according to claim 2, characterized in that: The positioning ring is provided with a positioning hole, and the positioning hole matches the connecting block.

4. The connection device for PCCP pipe according to claim 1, characterized in that: The connecting block is connected to the connecting block provided on the adjacent outer ring pipe via a bolt assembly.

5. The connection device for PCCP pipe according to claim 4, characterized in that: The bolt assembly includes a first bolt and a nut, wherein the first bolt passes through two connecting blocks and is connected to the nut.

6. The connection device for PCCP pipe according to claim 5, characterized in that: A gasket is provided between the first bolt and the connecting block.

7. The connection device for PCCP pipe according to claim 6, characterized in that: The gasket is made of rubber, stainless steel or high carbon steel.

8. The connecting device for PCCP pipe according to any one of claims 1 to 7, characterized in that: The outer ring pipe is provided with a plurality of first threaded holes, and the fastening member is correspondingly provided with a plurality of second threaded holes.

9. The connecting device for PCCP pipe according to any one of claims 1 to 7, characterized in that: The inner diameter of the outer ring pipe is larger than the inner diameter of the pipe to be connected.

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