Socket and spigot type thermal pipe jacking connector
Through the use of inheritance design in the thermal top pipe interface, combined with the ball -ink cast iron pipe, thermal insulation layer, external care pipe, top push ring and sealing rubber ring, the existing thermal top pipe interface has poor insulation effect and insufficient construction sealing performance. The problem achieves better thermal insulation effects and construction safety.
Patent Information
- Application Number
- CN202421098164.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-20
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-05-20
AI Technical Summary
The existing thermal pipe duct interface has poor insulation effect, which can easily lead to heat loss in the pipeline, and the interface sealing performance is insufficient during construction, affecting construction efficiency and safety.
The design of the inheritance thermal top pipe interface, including the ball and ink cast iron pipe, thermal insulation layer and the external care pipe, combined with the design of the top push ring and the sealing rubber ring, to realize the sealing, thermal insulation and push -push function of the interface.
It improves the thermal insulation effect and construction safety of the thermal top pipe interface, realize the sealing and push function of the pipeline interface, simplify the construction process and reduce the research and development cost.
Smart Images
Figure CN222416347U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of thermal jacking pipes, in particular to a socket-and-spigot type thermal jacking pipe interface. Background Art
[0002] The application of thermal pipe networks on ductile iron pipes is becoming more and more extensive, especially in the construction of urban thermal networks. Thermal pipe networks have also been laid underground instead of on the ground. Especially in areas that cannot be excavated, the use of thermal pipe jacking can reduce the impact on ground buildings and facilities, such as crossing railways, important urban roads, large underground facilities, buildings, etc., thereby improving the construction efficiency and safety of thermal projects.
[0003] During the laying of underground thermal jacking pipes, the jacking pipe interface is required to have good thermal insulation effect and mechanical properties, but the thermal insulation effect of the existing thermal jacking pipe interface is average. For example, in the utility model patented socket-type steel jacking pipe, a concrete layer is laid on the outer surface of the socket pipe and the straight pipe, but the thermal insulation performance of the concrete layer is average, which easily causes heat loss in the pipeline; for example, in a utility model patented cast iron thermal jacking pipe, its outer surface protective layer is a polyethylene protective sleeve, and the interface joint does not have sealing performance. When hot water is transported in the pipeline, due to the principle of thermal expansion and contraction, the pipeline interface will have a relative pull-out gap, and groundwater will penetrate into the thermal insulation layer along the gap of the polyethylene protective sleeve. After water enters the thermal insulation layer, the thermal conductivity will increase, greatly reducing the thermal insulation effect of the thermal jacking pipe interface. Utility Model Content
[0004] The technical problem to be solved by the utility model is to provide a socket-type thermal jacking pipe interface, which has the characteristics of good thermal insulation effect, convenient and fast construction, and safe and reliable structure.
[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:
[0006] A socket-and-spigot thermal jacking pipe interface comprises a thermal jacking pipe, a jacking ring, a first sealing rubber ring and a second sealing rubber ring for sealing the interface; the two ends of the thermal jacking pipe are relative socket and spigot structures, comprising a ductile iron pipe, an insulation layer and an outer protective pipe arranged in sequence from the inside to the outside; the jacking ring is an annular symmetrical structure, the center of the outer side of the ring is an annular boss, and the two sides of the ring are end faces; the boss is embedded in the outer protective pipe, and the end face is arranged on the inner side of the outer protective pipe; the first sealing rubber ring and the second sealing rubber ring are both annular integrated structures.
[0007] A further improvement of the technical solution of the utility model is that the ductile iron pipe is a relative socket structure, and an annular sealing chamber with a semicircular boss is provided on the inner side of the socket end for placing the first sealing rubber ring, and a chamfer is provided at the end of the socket to facilitate the insertion of the first sealing rubber ring into the pipe socket.
[0008] A further improvement of the technical solution of the utility model is that the chamfer range is 15 to 60 degrees.
[0009] A further improvement of the technical solution of the utility model is that the chamfer range is 30 to 45 degrees.
[0010] A further improvement of the technical solution of the utility model is that the outer diameter of the boss is the same as the outer diameter of the outer protective tube.
[0011] A further improvement of the technical solution of the utility model is that: the end surface is in contact with the inner wall of the outer protective tube, and annular grooves for placing the second sealing rubber ring are respectively arranged on the end surfaces on both sides.
[0012] A further improvement of the technical solution of the utility model is that the radial outer contour of the first sealing rubber ring is interference fit with the inner contour of the sealing chamber of the socket of the ductile iron pipe, and the inner contour of the first sealing rubber ring is squeezed and sealed by the outer contour of the ductile iron pipe socket.
[0013] A further improvement of the technical solution of the utility model is that the maximum inner diameter of the second sealing rubber ring is smaller than the minimum outer diameter of the annular groove, and the minimum outer diameter after being placed in the groove is larger than the maximum inner diameter of the outer protective tube, and sealing is achieved by squeezing the inner contour of the outer protective tube and the outer contour of the second sealing rubber ring.
[0014] Due to the adoption of the above technical solution, the technical progress achieved by the utility model is:
[0015] 1. The utility model has a simple structure of pipeline interface and convenient installation. The pipeline interface is optimized on the basis of the existing pipeline interface. The thermal jacking pipe interface and the pipeline interface at the excavation site have good versatility. Direct installation on site does not require specific interface conversion parts.
[0016] 2. The utility model adopts existing mature products for the pipe interface sealing rubber ring and the sealing rubber ring, with small interface installation force, safe and reliable sealing, and no mold development is required, which shortens the R&D cycle and reduces the R&D cost;
[0017] 3. The pipe interface of the utility model adopts an outer protective pipe and a jacking ring design to meet the market application of thermal jacking pipes, and at the same time realizes the sealing, insulation and jacking functions of the thermal jacking pipe interface. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a cross-sectional schematic diagram of the thermal jacking pipe interface;
[0019] Figure 2 It is a schematic diagram of the cross section of the thermal jacking pipe;
[0020] Figure 3 It is a schematic diagram of the cross section of a ductile iron pipe;
[0021] Figure 4 Schematic diagram of the cross section of the pipeline push ring;
[0022] Figure 5 This is a three-dimensional diagram of the first sealing rubber ring of the pipeline;
[0023] Figure 6 This is a three-dimensional diagram of the second sealing rubber ring of the pipeline;
[0024] Among them, 1. thermal jacking pipe, 11. ductile iron pipe, 111. annular sealing chamber, 112. chamfer, 12. insulation layer, 13. outer protective pipe, 2. jacking ring, 21. boss, 22. end face, 23. groove, 3. first sealing rubber ring, 4. second sealing rubber ring. DETAILED DESCRIPTION
[0025] The present invention is further described in detail below with reference to the accompanying drawings and embodiments:
[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" ... etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.
[0027] In addition, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", etc. may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "several" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0028] like Figure 1 As shown, a socket-type thermal jacking pipe interface comprises: a thermal jacking pipe 1, a jacking ring 2, a first sealing rubber ring 3 and a second sealing rubber ring 4;
[0029] like Figure 2 As shown, the thermal jacking pipe 1 includes a ductile iron pipe 11, an insulation layer 12 and an outer protective pipe 13 arranged in sequence from the inside to the outside; the ductile iron pipe 11 is a relative socket structure, such as Figure 3As shown, an annular sealing chamber 111 with a semicircular boss is provided inside the socket end for placing the first sealing rubber ring 3, and a 15-60 degree chamfer 112 is provided at the end of the socket, and the chamfer 112 is preferably 30-45 degrees, so as to facilitate the insertion of the first sealing rubber ring 3 into the pipe socket. The material of the thermal insulation layer 12 is hard polyurethane, and its manufacturing process is a pipe-in-pipe process. The outer protective tube 13 is made of steel pipe or glass fiber reinforced plastic pipe.
[0030] like Figure 4 As shown, the pushing ring 2 is a ring-shaped symmetrical structure, and the outer center of the ring is a ring-shaped boss 21, whose outer diameter is the same as the outer diameter of the outer protective tube 13. The end face 22 of the boss 21 contacts the two end faces of the outer protective tube 13, which is used for pushing and transmitting force for the thermal jacking pipe 1. Annular grooves 23 are provided on both sides of the boss 21 for placing the second sealing rubber ring 4.
[0031] like Figure 5 As shown, the first sealing rubber ring 3 is an annular integrated structure, and its radial outer contour is interference fit with the inner contour of the socket sealing chamber 111 of the ductile iron pipe 11. The inner contour of the first sealing rubber ring 3 is squeezed and sealed through the outer contour of the socket of the ductile iron pipe 11, and its Shore hardness is 40HA~90HA, preferably 50-85HA.
[0032] like Figure 6 As shown, the second sealing rubber ring 4 is an annular integrated structure, the maximum inner diameter of which is smaller than the minimum outer diameter of the annular groove 23, and the minimum outer diameter after being placed in the groove 23 is larger than the maximum inner diameter of the outer protective tube, and is sealed by squeezing the inner contour of the outer protective tube 13 with the outer contour of the second sealing rubber ring 4, and the Shore hardness is 30HA to 70HA, preferably 40-60HA. They are not listed here one by one.
[0033] The thermal insulation performance of the interface of the thermal jacking pipe 1 mainly depends on the hard polyurethane material and the sealing and waterproofing of the inner and outer interfaces of the pipe. The pushing performance of the interface of the thermal jacking pipe 1 mainly depends on the contact force transmission between the outer protective pipe 13 and the pushing ring 2, thereby achieving good sealing, thermal insulation and pushing performance of the interface of the thermal jacking pipe 1.
[0034] The installation method of the above-mentioned pipeline connecting device comprises the following steps:
[0035] S1. The first sealing rubber ring 3 and the second sealing rubber ring 4 are respectively pressed into the socket sealing chamber 111 of the ductile iron pipe 1 and the annular groove 23 of the push ring 2;
[0036] S2. After installing the first sealing rubber ring 3 and the second sealing rubber ring 4, apply a layer of lubricant on its surface;
[0037] S3. Insert the socket on one side of the jacking ring into the outer protective tube 13 at the socket end of the thermal jacking pipe 1 along the axial direction through the jacking equipment, and the second sealing rubber ring 4 on one side is compressed to form a sealed state;
[0038] S4. The ductile iron pipe 11 and the outer protective pipe 13 of the thermal jacking pipe 1 are installed axially to the socket of the ductile iron pipe 11 and the designated position of the jacking ring 2 by means of the jacking equipment, the first sealing rubber ring 3 is compressed and sealed by the socket and the ductile iron pipe 1, the second sealing rubber ring 4 is compressed and sealed by the outer protective pipe 13 and the jacking ring 2, and the end face of the outer protective pipe 13 of the thermal jacking pipe 1 is in contact with the boss end face 22 of the jacking ring 2 to transmit force;
[0039] S5. After the installation of the interface of the thermal jacking pipe 1 is completed, the first sealing rubber ring 3 is used for internal sealing of the pipe interface to prevent leakage of the transported medium in the pipe, and the second sealing rubber ring 4 is used for external sealing of the pipe interface to prevent groundwater from entering the insulation layer. The end face of the outer protective pipe 13 is in contact with the end face 22 of the boss of the jacking ring 2, which is used for jacking force transmission of the entire pipeline.
[0040] In summary, a socket-type thermal jacking pipe interface comprises a thermal jacking pipe 1, a jacking ring 2, and a sealing rubber ring. The thermal jacking pipe 1 comprises a ductile iron pipe 11, an insulation layer 112; a chamfer; 12, and an outer protective pipe 13 in a three-in-one structure. The interface can realize the pipeline interface sealing, insulation and jacking functions. The ductile iron pipe 11 can realize the medium transportation in the pipeline; the insulation layer 112; the chamfer; 12 can realize the heat insulation and heat preservation of the transportation medium; the outer protective pipe 13 can realize the jacking force transmission of the thermal jacking pipe 1 and the sealing between the outer protective pipe 13 and the insulation layer 112; the chamfer; 12; the two ends of the ductile iron pipe 11 are relative socket structures, and the socket connection realizes the internal interface sealing through the sealing rubber ring; the insulation layer Layer 112; chamfer; 12 is in the cavity between the main body of the ductile iron pipe 11 and the outer protective tube 13, and its material is hard polyethylene material; the outer protective tube 13 is a full diameter, and both ends of the outer protective tube 13 are connected to the push ring 2 to realize external interface sealing and push force; both ends of the push ring 2 are provided with annular sealing grooves for placing sealing rubber rings, and an annular protrusion is provided in the middle of the push ring 2 and contacts with the end face 22 of the outer protective tube 13, which is used to transfer the push force of the thermal jacking pipe 1; the utility model is a socket-type thermal jacking pipe 1 interface through the ductile iron pipe 11, the insulation layer 112; chamfer; 12, the outer protective tube 13 three-in-one structure, combined with the use of the push ring 2, so as to realize the interface sealing, insulation and push functions.
Claims
1. A socket-type thermal jacking pipe interface, characterized in that: The invention comprises a thermal jacking pipe (1), a jacking ring (2), a first sealing rubber ring (3) and a second sealing rubber ring (4) for sealing the interface; the two ends of the thermal jacking pipe (1) are opposite socket structures, comprising a ductile iron pipe (11), a thermal insulation layer (12) and an outer protective pipe (13) arranged in sequence from the inside to the outside; the jacking ring (2) is an annular symmetrical structure, the center of the outer side of the annular ring is an annular boss (21), and the two sides of the annular ring are end faces (22); the boss (21) is embedded in the outer protective pipe (13), and the end face (22) is arranged on the inner side of the outer protective pipe (13); the first sealing rubber ring (3) and the second sealing rubber ring (4) are both annular integrated structures.
2. A socket-and-spigot type thermal jacking pipe joint according to claim 1, characterized in that: The ductile iron pipe (11) is a relative socket structure, and an annular sealing chamber (111) with a semicircular boss is provided on the inner side of the socket end for accommodating the first sealing rubber ring (3), and a chamfer (112) is provided at the end of the socket to facilitate the insertion of the first sealing rubber ring (3) into the pipe socket.
3. A socket-and-spigot type thermal jacking pipe joint according to claim 2, characterized in that: The chamfer (112) ranges from 15 to 60 degrees.
4. The socket-and-spigot type thermal jacking pipe joint according to claim 2, characterized in that: The chamfer (112) ranges from 30 to 45 degrees.
5. The socket-and-spigot type thermal jacking pipe joint according to claim 1, characterized in that: The outer diameter of the boss (21) is the same as the outer diameter of the outer protective tube (13).
6. The socket-and-spigot type thermal jacking pipe joint according to claim 1, characterized in that: The end surface (22) contacts the inner wall of the outer protective tube (13), and an annular groove (23) for accommodating a second sealing rubber ring (4) is respectively provided on the end surfaces (22) on both sides.
7. The socket-and-spigot type thermal jacking pipe joint according to claim 1, characterized in that: The radial outer contour of the first sealing rubber ring (3) and the inner contour of the socket sealing chamber (111) of the ductile iron pipe (11) are in interference fit, and the inner contour of the first sealing rubber ring (3) is squeezed and sealed through the outer contour of the socket of the ductile iron pipe (11).
8. The socket-and-spigot type thermal jacking pipe joint according to claim 1, characterized in that: The maximum inner diameter of the second sealing rubber ring (4) is smaller than the minimum outer diameter of the annular groove (23); the minimum outer diameter after being placed in the groove (23) is larger than the maximum inner diameter of the outer protective tube; the sealing is achieved by squeezing the inner contour of the outer protective tube (13) and the outer contour of the second sealing rubber ring (4) together.