Connecting device and connecting method for PCCP (prestressed concrete cylinder pipe)

Abstract

The invention provides a connecting device and a connecting method for a PCCP (prestressed concrete cylinder pipe). The connecting device comprises a to-be-connected pipe, a sealing ring and a tightening piece, the end of the to-be-connected pipeline is an outer ring pipeline, the inner diameter of the outer ring pipeline is larger than that of the to-be-connected pipeline, a plurality of connecting blocks are arranged on the outer wall of the outer ring pipeline, the connecting blocks are connected with the connecting blocks arranged on the adjacent outer ring pipeline through bolt assemblies, and the sealing rings are arranged between the adjacent outer ring pipelines. The tightening pieces are arranged in the outer ring pipelines of the adjacent to-be-connected pipelines in a sleeved mode and connected with the two outer ring pipelines. The sealing ring comprises a positioning ring, one end of the positioning ring is arranged on the outer ring pipeline in a sleeving mode, the other end of the positioning ring is provided with a sealing ring extending towards the circle center in the radius direction of the positioning ring, and the sealing ring is located between the adjacent outer ring pipelines. The sealing performance of the connecting position of the to-be-connected pipelines can be guaranteed, and the bonding strength of the connecting position is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline connection, and in particular to a connection device and a connection method for a PCCP pipeline. Background Art

[0002] PCCP prestressed pipes are used in long-distance water transmission, power plant return water, urban water supply, etc. The existing PCCP prestressed pipes are complicated to install when connected, and only rely on sealing rings and their own friction for sealing. In addition, the bonding strength of the PCCP prestressed pipe connection is not enough. Once the two PCCP prestressed pipes are displaced or loosened, the sealing cannot be guaranteed, which affects the use effect of the PCCP prestressed pipes.

[0003] The utility model with the publication number CN214999964U discloses a prestressed steel cylinder concrete pipe socket connector, including 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 is 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 is connected to the second pipe body; the two ends of the middle connector respectively have a first socket and a second socket that expand outward, the first socket is connected to the first pointed end of the first pipe body connector, and the second socket is connected to the second pointed end of the second pipe body connector. However, the above-mentioned prestressed steel cylinder concrete pipe socket connector needs to ensure that the front and rear order of the two pipes is correct before connection, and ensure that the socket is inserted into the socket, which is complicated to install and inefficient, and it is also easy to cause pipe damage due to misaligned angles. Summary of the invention

[0004] The object of the present invention is to solve the defects in the prior art and provide a connection device and a connection method for PCCP pipes, so as to ensure the sealing of the connection between the pipes to be connected and improve the bonding strength of the connection.

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

[0006] The end of the pipe to be connected is an outer ring pipe, the inner diameter of the outer ring pipe is larger than the inner diameter of the pipe to be connected, the outer wall of the outer ring pipe is provided with a plurality of connection blocks, the connection blocks are connected with the connection blocks provided on the adjacent outer ring pipes through bolt assemblies, the sealing ring is provided between the adjacent outer ring pipes, the clamp is sleeved in the outer ring pipes of the adjacent pipes to be connected, and both are connected to the two outer ring pipes;

[0007] The sealing ring comprises 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.

[0008] First place the first pipe to be connected, then put the positioning ring on the outer ring pipe connected to the first pipe to be connected, fix the sealing ring through the friction between the inner wall of the positioning ring and the outer ring pipe, and put one end of the tightening member into the outer ring pipe.

[0009] Place the second pipe to be connected, insert the other end of the clamp into the outer pipe 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 pipes of the first pipe to be connected and the second pipe to be connected are both provided with a plurality of connection blocks. Connect the connection blocks with the connection blocks provided on the adjacent outer pipes, align the second pipe to be connected with the first pipe to be connected, and when the two pipes are connected through the pipe to be connected, the sealing ring is located between the outer pipes of the two pipes to be connected. After the two pipes to be connected are connected, connect the clamp to the two outer pipes respectively.

[0010] In the present invention, due to the presence of the sealing ring, the pressure applied on both sides of the pipes to be connected actually acts on the sealing ring, which firstly plays a buffering role to protect the pipe openings of the two pipes to be connected from being damaged, and secondly, the pipe openings of the two pipes to be connected will be more tightly combined with the sealing ring, thereby enhancing the sealing of the connection of the pipes to be connected. In addition, a tightening hoop is also sleeved inside the two outer ring pipes, so that the connection of the two pipes to be connected is more tightly connected, thereby improving the bonding strength of the connection.

[0011] Optionally, a positioning hole is provided on the positioning ring, and the positioning hole matches the connecting block.

[0012] The positioning ring is provided with a positioning hole corresponding to the connection block, and the positioning ring is sleeved on the outside of the connection block through the positioning hole to limit the sealing ring and prevent the sealing ring from falling out of the pipe to be connected.

[0013] Optionally, the connection block is connected to a connection block provided on an adjacent outer ring pipe via a bolt assembly.

[0014] 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.

[0015] The positioning ring is put on the outside of the connecting block, and the first bolt is installed so that the positioning ring is clamped between the first bolt and the outer ring pipe to prevent the positioning ring from falling out of the connecting block. The first bolt is passed through two connecting blocks respectively arranged on adjacent outer ring pipes and connected with the nut to realize the connection of adjacent outer ring pipes.

[0016] Optionally, a gasket is provided between the first bolt and the connecting block to reduce the wear of the connecting block during the installation of the first bolt.

[0017] Optionally, the gasket is made of rubber, stainless steel or high carbon steel.

[0018] 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.

[0019] Optionally, the clamp is further provided with a second bolt, and the second bolt passes through the second threaded hole and is connected to the first threaded hole.

[0020] Optionally, the tightening member is made of stainless steel.

[0021] The present invention also provides a connection method based on the above-mentioned connection device for PCCP pipes, comprising the following steps:

[0022] S1, first place a pipe to be connected;

[0023] S2. Put the positioning ring on the outer pipe of the pipe to be connected, and the sealing ring is located at the pipe opening of the outer pipe;

[0024] S3, insert one end of the fastening member into the outer ring pipe;

[0025] S4, placing another pipe to be connected, inserting the other end of the clamp into the outer ring pipe of the other pipe to be connected, and aligning the other pipe to be connected with the pipe to be connected placed in step S1;

[0026] S5, connecting the connecting blocks provided on the adjacent outer ring pipes, so that the outer ring pipes of the two pipes to be connected are connected, and the sealing ring is located between the two outer ring pipes;

[0027] S6. Connect the clamps to the outer pipes of the two pipes to be connected respectively.

[0028] Beneficial effects:

[0029] The invention comprises a pipe to be connected, a sealing ring and a clamp. The first pipe to be connected is placed first, and then the positioning ring is put on the outer ring pipe connected to the first pipe to be connected, the sealing ring is fixed by the friction between the inner wall of the positioning ring and the outer ring pipe, and one end of the clamp is put into the outer ring pipe.

[0030] Place the second pipe to be connected, insert the other end of the clamp into the outer pipe 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 pipes of the first pipe to be connected and the second pipe to be connected are both provided with a plurality of connection blocks. Connect the connection blocks with the connection blocks provided on the adjacent outer pipes, align the second pipe to be connected with the first pipe to be connected, and when the two pipes are connected through the pipe to be connected, the sealing ring is located between the outer pipes of the two pipes to be connected. After the two pipes to be connected are connected, connect the clamp to the two outer pipes respectively.

[0031] In the present invention, due to the presence of the sealing ring, the pressure applied on both sides of the pipes to be connected actually acts on the sealing ring, which firstly plays a buffering role to protect the pipe openings of the two pipes to be connected from being damaged, and secondly, the pipe openings of the two pipes to be connected will be more tightly combined with the sealing ring, thereby enhancing the sealing of the connection of the pipes to be connected. In addition, a tightening hoop is also sleeved inside the two outer ring pipes, so that the connection of the two pipes to be connected is more tightly connected, thereby improving the bonding strength of the connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments 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 creative work.

[0033] Figure 1 It is a structural diagram of a connection device for a PCCP pipe disclosed in the present invention;

[0034] Figure 2 It is a structural diagram of a pipe to be connected in a connecting device for a PCCP pipe disclosed in the present invention;

[0035] Figure 3 It is a structural diagram of another pipeline to be connected of the connecting device for PCCP pipeline disclosed in the present invention;

[0036] Figure 4 It is a structural diagram of a sealing ring in a connection device for a PCCP pipe disclosed in the present invention;

[0037] Figure 5 The present invention is a structural diagram of a clamping member in a connection device for a PCCP pipe disclosed in the present invention.

[0038] Reference numerals:

[0039]

[0040]

[0041] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with the implementation methods and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0042] 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0043] 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 in combination with the specific content of the technical solution.

[0044] In the description of the present invention, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples" or "some examples" etc. 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 schematic representations 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 one or more embodiments or examples in a suitable manner.

[0045] Embodiment 1:

[0046] See also Figure 1-5 , a connecting device for a PCCP pipe according to a first embodiment of the present invention comprises a pipe to be connected 1, a sealing ring 2 and a clamp 4;

[0047] The end of the pipe 1 to be connected is an outer ring pipe 11, the inner diameter of the outer ring pipe 11 is larger than the inner diameter of the pipe 1 to be connected, the outer wall of the outer ring pipe 11 is provided with a plurality of connection blocks 12, the connection blocks 12 are connected with the connection blocks 12 provided on the adjacent outer ring pipes 11, the sealing ring 2 is provided between the adjacent outer ring pipes 11, the clamp 4 is sleeved in the outer ring pipes 11 of the adjacent pipes 1 to be connected, and both are connected to the two outer ring pipes 11;

[0048] The sealing ring 2 comprises a positioning ring 21 , one end of which is sleeved on the outer ring pipe 11 , and the other end of which 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 .

[0049] Specifically, the pipe 1 to be connected and the outer pipe 11 can be integrally cast during the preparation process. The inner diameter and outer diameter of the sealing ring 23 are consistent with the inner diameter and outer diameter of the outer pipe 11 to achieve the purpose of waterproofing.

[0050] First place the first pipe to be connected, then put the positioning ring 21 into the outer ring pipe 11 connected to the first pipe 1 to be connected, fix the sealing ring 2 through 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.

[0051] Place the second pipe to be connected, insert the other end of the clamp 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 to be connected and the second pipe 1 to be connected are both provided with a plurality of connection blocks 12. Connect the connection blocks 12 with the connection 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 when the two are connected through the pipe 1 to be connected, the sealing ring 23 is located between the outer ring pipes 11 of the two pipes 1 to be connected. After the two pipes 1 to be connected are connected, connect the clamp 4 with the two outer ring pipes 11 respectively.

[0052] In the present invention, due to the presence of the sealing ring 2, the pressure applied on both sides of the pipes 1 to be connected actually acts on the sealing ring 23, which firstly plays a buffering role to protect the pipe openings of the two pipes 1 to be connected from being damaged, and secondly, the pipe openings of the two pipes 1 to be connected will be more tightly combined with the sealing ring 2, thereby enhancing the sealing of the connection of the pipes 1 to be connected. In addition, a tightening member 4 is also sleeved inside the two outer ring pipes 11, so that the connection of the two pipes 1 to be connected is more tightly connected, thereby improving the bonding strength of the connection.

[0053] 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 .

[0054] 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.

[0055] See also Figure 1-3 In some embodiments of the present invention, the connection block 12 is connected to the connection block 12 provided on the adjacent outer ring pipe 11 via a bolt assembly 3.

[0056] 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. Outer ring pipes 11 are 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.

[0057] The connecting block 12 is cut from a cylinder, and the axis of the connecting block 12 should coincide with the generatrix of the outer pipe 11 circle. Then, the part of the cylinder outside the outer pipe 11 circle is retained to form the connecting block 12, and the part of the cylinder inside the outer pipe 11 circle is cut. If the point where the center of the circle corresponding to the connecting block 12 coincides with the outer pipe 11 is used as the tangent point, and a tangent line is drawn to the circle of the outer pipe 11, then 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.

[0058] The two connecting blocks 12 arranged on an 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 to be connected should be kept coincident.

[0059] 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 .

[0060] 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 passes through two connecting blocks respectively arranged on adjacent outer ring pipes 11 and is connected to the nut 32 to achieve the connection of the adjacent outer ring pipes 11.

[0061] 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 .

[0062] In some embodiments of the present invention, the gasket is made of rubber, stainless steel or high carbon steel.

[0063] See also Figure 2 , 3 In some embodiments of the present invention, the outer ring pipe 11 is provided with a plurality of first threaded holes 13 , and the clamping member 4 is correspondingly provided with a plurality of second threaded holes 41 .

[0064] In this embodiment, 16 first threaded holes 13 are provided on the inner wall of the outer ring pipe 11, and two rows of second threaded holes 41 are provided on the clamp 4, which are connected to the two outer ring pipes 11 through the two rows of second threaded holes 41 respectively. 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. The second bolts 42 pass through the second threaded holes 41 and are connected to the first threaded holes 13 to fix the clamp 4 on the outer ring pipe 11, so that the connection between the two pipes 1 to be connected is tighter.

[0065] In some embodiments of the present invention, the fastening member 4 is made of stainless steel.

[0066] Embodiment 2:

[0067] See also Figure 1-5 According to a second embodiment of the present invention, a connection method based on the above-mentioned connection device for PCCP pipes comprises the following steps:

[0068] S1, first place a pipe 1 to be connected;

[0069] S2, putting the positioning ring 21 on the outer ring pipe 11 of the pipe 1 to be connected, and the sealing ring 23 is located at the pipe opening of the outer ring pipe 11;

[0070] S3, insert one end of the fastening member 4 into the outer ring pipe 11;

[0071] S4, placing another pipe 1 to be connected, inserting the other end of the fastening member 4 into the outer ring pipe 11 of the other pipe to be connected, and aligning the other pipe 1 to be connected with the pipe 1 to be connected placed in step S1;

[0072] S5, connecting the connecting blocks 12 provided on the adjacent outer ring pipes 11, so that the outer ring pipes 11 of the two pipes 1 to be connected are connected, and the sealing ring 23 is located between the two outer ring pipes;

[0073] S6, connecting the clamping member 4 to the outer ring pipes 11 of the two pipes 1 to be connected respectively.

[0074] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A connection device for a PCCP pipeline, characterized in that: Including pipes to be connected, sealing rings and clamps; The end of the pipe to be connected is an outer ring pipe, the inner diameter of the outer ring pipe is larger than the inner diameter of the pipe to be connected, the outer wall of the outer ring pipe is provided with a plurality of connection blocks, the connection blocks are connected with the connection blocks provided on the adjacent outer ring pipes through bolt assemblies, the sealing ring is provided between the adjacent outer ring pipes, the clamp is sleeved in the outer ring pipes of the adjacent pipes to be connected, and both are connected to the two outer ring pipes; The sealing ring comprises 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.

2. The connection device for PCCP pipe according to claim 1, characterized in that: The positioning ring is provided with a positioning hole, and the positioning hole matches the connecting block.

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

4. The connection device for PCCP pipe according to claim 3, 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 with the nut.

5. The connection device for PCCP pipe according to claim 4, characterized in that: A gasket is provided between the first bolt and the connecting block.

6. The connection device for PCCP pipe according to claim 5, characterized in that: The gasket is made of rubber, stainless steel or high carbon steel.

7. The connection device for PCCP pipe according to any one of claims 1 to 6, characterized in that: 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.

8. The connection device for PCCP pipe according to claim 7, characterized in that: The fastening member is also provided with a second bolt, and the second bolt passes through the second threaded hole and is connected with the first threaded hole.

9. The connection device for PCCP pipe according to any one of claims 1 to 6, characterized in that: The fastening hoop is made of stainless steel.

10. A connection method based on the connection device for PCCP pipe according to any one of claims 1 to 9, characterized in that: The steps include: S1, first place a pipe to be connected; S2. Put the positioning ring on the outer pipe of the pipe to be connected, and the sealing ring is located at the pipe opening of the outer pipe; S3, insert one end of the fastening member into the outer ring pipe; S4, placing another pipe to be connected, inserting the other end of the clamp into the outer ring pipe of the other pipe to be connected, and aligning the other pipe to be connected with the pipe to be connected placed in step S1; S5, connecting the connecting blocks provided on the adjacent outer ring pipes, so that the outer ring pipes of the two pipes to be connected are connected, and the sealing ring is located between the two outer ring pipes; S6. Connect the clamps to the outer pipes of the two pipes to be connected respectively.

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