Nodular cast iron thermal jacking pipe connector
By using ductile iron pipe, insulation layer and outer guard pipe in the ductile iron thermopile interface, and using sealing rubber ring and push-push design, the problem of poor insulation effect of the existing thermal pipe interface is solved, and sealing and insulation are achieved and boost performance.
Patent Information
- Application Number
- CN202421097961.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-20
- Publication Date
- 2025-02-14
- Estimated Expiration
- 2034-05-20
AI Technical Summary
The existing thermal pipe jacking interface has poor insulation effect, which can easily lead to heat loss in the pipeline and it is difficult to ensure sealing performance during construction.
The ductile iron thermal pipe interface is adopted, including the ductile iron pipe, insulation layer and outer guard pipe. The first and second sealing rings are squeezed at the socket to form a seal. The pushing design of the outer guard pipe prevents groundwater from entering the insulation layer. .
It realizes good sealing, insulation and pushing performance of the thermal pipe interface, improves construction efficiency and safety, and reduces heat loss.
Smart Images
Figure CN222479644U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of thermal jacking pipes, in particular to a ductile iron 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 Chinese 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 cast iron thermal jacking pipe in the Chinese utility model patent, the 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 ductile iron 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 ductile iron thermal jacking pipe interface comprises a thermal jacking pipe, a first sealing rubber ring and a second sealing rubber ring; the thermal jacking pipe is a relative socket structure, comprising a ductile iron pipe, an insulation layer and an outer protective pipe arranged in sequence from the inside to the outside; the first sealing rubber ring is extruded through the socket of the ductile iron pipe to form an internal interface seal of the pipeline, and the second sealing rubber ring is extruded through the socket of the outer protective pipe to form an external interface seal of the pipeline.
[0007] The further improvement of the technical solution of the utility model is that: a first socket and a first plug are arranged on the ductile iron pipe; an annular sealing chamber with a semicircular boss is arranged on the inner side of the first socket for placing a first sealing rubber ring; a first chamfer is arranged at the end of the first plug.
[0008] A further improvement of the technical solution of the utility model is that the first chamfer range is 15 to 60 degrees.
[0009] A further improvement of the technical solution of the utility model is that the first chamfer range is 30 to 45 degrees.
[0010] A further improvement of the technical solution of the utility model is that the thermal insulation layer is filled in the cavity between the ductile iron pipe and the outer protective pipe.
[0011] A further improvement of the technical solution of the utility model is that a second socket and a second plug are arranged on the outer protective tube, an annular groove is arranged on the outer side of the second plug for placing a second sealing rubber ring, and a second chamfer is arranged at the end of the second plug.
[0012] A further improvement of the technical solution of the utility model is that the second chamfer range is 15 to 60 degrees.
[0013] A further improvement of the technical solution of the utility model is that the second chamfer range is 30 to 45 degrees.
[0014] A further improvement of the technical solution of the utility model is that: the first sealing rubber ring is an annular integrated structure, and its radial outer contour is interference fit with the inner contour of the socket sealing chamber of the ductile iron pipe.
[0015] A further improvement of the technical solution of the utility model is that the second sealing rubber ring is an annular integrated structure, the maximum inner diameter of which is smaller than the minimum outer diameter of the annular groove, and the minimum outer diameter after being placed in the annular groove is larger than the maximum inner diameter of the socket sealing surface of the outer protective tube.
[0016] Due to the adoption of the above technical solution, the technical progress achieved by the utility model is:
[0017] 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.
[0018] 2. The utility model uses existing mature products as the sealing rubber ring for the pipe interface, and the sealing rubber ring has small interface installation force and safe and reliable sealing. At the same time, it does not require mold development, shortens the R&D cycle, and reduces R&D costs.
[0019] 3. The pipe interface of the utility model adopts the sealing and jacking design of the outer protective pipe, which can prevent groundwater from entering the insulation layer during the process of thermal expansion and contraction of the pipe interface. This thermal jacking pipe interface has good sealing, thermal insulation and jacking functions. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a cross-sectional schematic diagram of the thermal jacking pipe interface;
[0021] Figure 2 It is a schematic diagram of the cross section of the thermal jacking pipe;
[0022] Figure 3 It is a three-dimensional picture of the pipeline sealing rubber ring;
[0023] Figure 4 It is a three-dimensional picture of the pipeline sealing rubber ring;
[0024] Among them, 1. thermal jacking pipe, 11. ductile iron pipe, 111. first socket, 112. first plug, 113. socket sealing chamber, 114. first chamfer, 12. insulation layer, 13. outer protective pipe, 131. second socket, 132. second plug, 133. annular groove, 134. second chamfer, 135. plug vertical surface, 136. socket end face, 137. socket sealing surface, 2. first sealing rubber ring, 3. 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 ductile iron thermal jacking pipe interface comprises a thermal jacking pipe 1, a first sealing rubber ring 2 and a second sealing rubber ring 3;
[0029] like Figure 2As shown, the thermal jacking pipe 1 includes a ductile iron pipe 11, an insulation layer 12 and an outer protective pipe 13 which are arranged in sequence from the inside to the outside; the thermal jacking pipe 1 is a relative socket structure, and the socket of the thermal jacking pipe 1 includes a first socket 111 and a second socket 131; the socket of the thermal jacking pipe 1 includes a first socket 112 and a second socket 132; an annular sealing chamber 113 with a semicircular boss is provided on the inner side of the first socket 111 for placing the first sealing rubber ring 2, and the end of the first socket 112 is designed to have a first chamfer 114 of 15 to 60 degrees, preferably 30 to 45 degrees, so as to facilitate the insertion of the pipe socket 112 into the pipe socket 111; the insulation layer 12 is made of hard polyurethane material, and its manufacturing process is a pipe-in-pipe process. The outer protective tube 13 is made of steel pipe or fiberglass pipe. An annular groove 133 is provided on the outer side of the second socket 132 for placing the second sealing rubber ring 3. The end of the second socket 132 is provided with a second chamfer 134 of 15 to 60 degrees, preferably 30 to 45 degrees, to facilitate the insertion of the pipe socket 132 into the pipe socket 131.
[0030] like Figure 3 As shown, the first sealing rubber ring 2 is an annular integrated structure, and its radial outer contour is interference fit with the inner contour of the socket sealing chamber 113 of the ductile iron pipe 11, and its Shore hardness is 40HA~90HA, and preferably 50-85HA.
[0031] like Figure 4 As shown, the second sealing rubber ring 3 is an annular integrated structure, the maximum inner diameter of which is smaller than the minimum outer diameter of the annular groove 133, and the minimum outer diameter after being placed in the annular groove 133 is larger than the maximum inner diameter of the protective tube socket sealing surface 137, and the Shore hardness thereof is 30HA to 70HA, preferably 40 to 60HA.
[0032] During the installation of the pipe interface, the first sealing rubber ring 2 is squeezed through the socket of the ductile iron pipe 11 to form a seal on the internal interface of the pipe, and the second sealing rubber ring 3 is squeezed through the socket of the outer protective tube 13 to form a seal on the external interface of the pipe. During the installation of the pipe interface, the socket facade 135 of the outer protective tube 13 is preferentially contacted with the socket end face 136 of the outer protective tube 13 to achieve the jacking force transmission of the thermal jacking pipe 1 interface. They are not listed here one by one. The thermal insulation performance of the interface of the thermal jacking pipe 1 relies on the hard polyurethane insulation layer, and the sealing performance relies on the sealing and waterproofing of the inner and outer pipe interfaces. The jacking performance of the interface of the thermal jacking pipe 1 mainly relies on the contact force transmission of the socket of the outer protective tube 13, thereby achieving good sealing, thermal insulation and jacking performance of the interface of the thermal jacking pipe 1.
[0033] The installation method of the above-mentioned pipeline connecting device comprises the following steps:
[0034] S1. Press the first sealing rubber ring 2 and the second sealing rubber ring 3 into the sealing chamber 113 of the socket of the ductile iron pipe 11 and the annular groove 133 of the socket of the outer protective tube 13 respectively;
[0035] S2. After installing the first sealing rubber ring 2 and the second sealing rubber ring 3, apply a layer of lubricant on its surface;
[0036] S3. Insert the socket of the thermal jacking pipe 1 axially into the designated position inside the socket of the thermal jacking pipe 1 by means of a jacking device, and the first sealing rubber ring 2 and the second sealing rubber ring 3 are compressed to form a sealed state;
[0037] S4. After the socket of the thermal jacking pipe 1 is installed to the designated position of the socket of the thermal jacking pipe 1 by the jacking equipment, the vertical surface of the socket of the outer protective pipe contacts the end surface of the protective pipe socket to transmit force;
[0038] S5. After the installation of the interface of the thermal jacking pipe 1 is completed, the first sealing rubber ring 2 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 3 is used for external sealing of the pipe interface to prevent groundwater from entering the insulation layer. The socket vertical surface 135 of the outer protective pipe 13 is in contact with the socket end surface 136 of the protective pipe, which is used for the jacking force transmission of the entire pipeline.
[0039] In summary, the thermal jacking pipe 1 of the utility model is composed of a three-in-one structure of a ductile iron pipe 11, an insulation layer 12, and an outer protective pipe 13, and the interface can realize the pipeline interface sealing, insulation and jacking functions. The ductile iron pipe 11 is connected through a socket and a first sealing rubber ring 2 is squeezed to complete the sealing of the conveying medium; the insulation layer 12 is filled in the cavity between the ductile iron pipe 11 and the outer protective pipe 13, and its material is a hard polyethylene material, which can achieve thermal insulation and heat preservation of the conveying medium; the outer protective pipe 13 is connected through a socket and a second sealing rubber ring 3 is squeezed to complete the interface sealing between the insulation layer and the external environment, and the socket end of the outer protective pipe 13 has an annular vertical surface in contact with the socket end face 136 of the outer protective pipe 13, so as to realize the jacking force transmission of the thermal jacking interface; the utility model is a ductile iron thermal jacking interface through the ductile iron pipe 11, the insulation layer 12, the outer protective pipe 13 The special structure of the trinity of the thermal insulation layer and the outer protective pipe 13 realizes the sealing, insulation and jacking functions of the thermal jacking interface.
Claims
1. A ductile iron thermal jacking pipe interface, characterized in that: The invention comprises a thermal jacking pipe (1), a first sealing rubber ring (2) and a second sealing rubber ring (3); the thermal jacking pipe (1) is a relative socket structure, comprising 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 first sealing rubber ring (2) is squeezed through the socket of the ductile iron pipe (11) to form a seal on the internal interface of the pipe, and the second sealing rubber ring (3) is squeezed through the socket of the outer protective pipe (13) to form a seal on the external interface of the pipe.
2. The ductile iron thermal jacking pipe interface according to claim 1, characterized in that: The ductile iron pipe (11) is provided with a first socket (111) and a first insert (112); an annular sealing chamber (113) with a semicircular boss is provided inside the first socket (111) for accommodating a first sealing rubber ring (2); and a first chamfer (114) is provided at the end of the first insert (112).
3. The ductile iron thermal jacking pipe interface according to claim 2, characterized in that: The first chamfer (114) ranges from 15 to 60 degrees.
4. The ductile iron thermal jacking pipe interface according to claim 2, characterized in that: The first chamfer (114) ranges from 30 to 45 degrees.
5. The ductile iron thermal jacking pipe interface according to claim 1, characterized in that: The thermal insulation layer (12) is filled in the cavity between the ductile iron pipe (11) and the outer protective pipe (13).
6. The ductile iron thermal jacking pipe joint according to claim 1, characterized in that: The outer protective tube (13) is provided with a second socket (131) and a second plug (132); an annular groove (133) is provided on the outer side of the second plug (132) for accommodating a second sealing rubber ring (3); and a second chamfer (134) is provided at the end of the second plug (132).
7. The ductile iron thermal jacking pipe interface according to claim 6, characterized in that: The second chamfer (134) ranges from 15 to 60 degrees.
8. The ductile iron thermal jacking pipe joint according to claim 6, characterized in that: The second chamfer (134) ranges from 30 to 45 degrees.
9. The ductile iron thermal jacking pipe joint according to claim 2, characterized in that: The first sealing rubber ring (2) is an annular integrated structure, and its radial outer contour is interference fit with the inner contour of the socket sealing chamber (113) of the ductile iron pipe (11).
10. The ductile iron thermal jacking pipe joint according to claim 6, characterized in that: The second sealing rubber ring (3) is an annular integrated structure, the maximum inner diameter of which is smaller than the minimum outer diameter of the annular groove (133), and the minimum outer diameter after being placed in the annular groove (133) is larger than the maximum inner diameter of the socket sealing surface (137) of the outer protective tube (13).