Sealing joint
By designing the wiring structure of annular shoulder stop and embedded heating wire at the composite pipe connection, the high radial compressive strength and sealing at the composite pipe connection are achieved, and the problem of insufficient sealing and compressive strength in the prior art is solved.
Patent Information
- Application Number
- CN202422886614.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-26
- Publication Date
- 2025-08-15
- Estimated Expiration
- 2034-11-26
AI Technical Summary
The radial compressive strength at the connections of the existing continuous fiber reinforced composite pipes is insufficient, and the flange sealing method cannot effectively improve the sealing properties at the connections.
A sealing joint is designed, including a wiring structure of annular shoulder stopper and an embedded heating wire, and the joint body is connected to the composite pipe through thermal welding, and the radial compressive strength is increased by using annular shoulder stopper to achieve sealing.
The radial compressive strength at the composite pipe connection is improved, and the sealing of the pipe connection is ensured through an annular shoulder barrier and sealing structure to prevent water from seeping in.
Smart Images
Figure CN223228098U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of composite pipelines, and particularly discloses a sealing joint. Background Art
[0002] Continuous fiber-reinforced composite pipes are high-pressure plastic composite pipes with thermoplastics as the matrix material for the inner and outer layers and a continuous fiber composite material as the reinforcement tape in the middle layer. They are commonly used as buried water supply pipes or gas pipes, and their hoop stiffness, strength, and other properties are far superior to those of ordinary plastic pipes. Existing continuous fiber-reinforced composite pipes typically turn the inner thermoplastic plastic end outward to form a flange at the end of the composite pipe, which seals the end of the composite pipe; the flange also facilitates the connection between pipes. However, turning the inner thermoplastic end outward does not improve the radial compressive strength of the composite pipe joint. Utility Model Content
[0003] The purpose of the utility model is to solve the above problems and provide a sealing joint.
[0004] The purpose of the present utility model is achieved through the following technical solution: a sealing joint, comprising a joint body; the connecting end of the joint body is provided with an annular shoulder, and two wiring structures are provided on the annular shoulder; a heating wire is embedded in the outer surface of the joint body, and the two ends of the heating wire are respectively connected to the two wiring structures.
[0005] Furthermore, the wiring structure includes a terminal whose lower end is inserted into the annular shoulder, and the heating wire is connected to the lower end of the terminal.
[0006] As a preferred solution, a drainage chamfer is formed on the end surface of the socket end of the joint body.
[0007] As a preferred solution, the wiring structure includes a terminal; a threaded hole is provided at the lower end of the terminal, and a screw is connected to the threaded hole; a fixing hole is provided on the annular shoulder, and the lower end of the terminal is inserted into the fixing hole, and the end of the heating wire is fixed between the screw cap of the screw and the bottom of the terminal.
[0008] As a preferred solution, an annular limiting boss is provided on the terminal post, and the annular limiting boss is in close contact with the annular shoulder surface.
[0009] As a preferred solution, a sealing gasket is provided between the annular limiting boss and the surface of the annular shoulder.
[0010] As a preferred solution, a sealing ring installation cavity is provided on the terminal post, and a sealing ring is installed in the sealing ring installation cavity.
[0011] As a preferred solution, a protective tube is provided on the annular shoulder and encloses the outside of the terminal, and a protective cover is covered on the protective tube.
[0012] Compared with the prior art, this application has the following beneficial effects:
[0013] (1) The connector body of the present invention can be welded to the inner wall of the end of the composite pipe by heat welding, thereby increasing the radial compressive strength of the composite pipe connection. The annular shoulder thereon serves to seal the end face of the composite pipe. At the same time, the design of the annular shoulder also facilitates the connection between composite pipes.
[0014] (2) The utility model forms a seal between the terminal and the annular shoulder, effectively preventing water from entering and contacting the heating wire.
[0015] Some additional features of the present application may be described in the following description. Some additional features of the present application will be apparent to those skilled in the art from an inspection of the following description and accompanying drawings, or from a thorough understanding of the production or operation of the embodiments. The features disclosed in this application may be realized and achieved through the practice or use of the various methods, means, and combinations of the specific embodiments described below. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The exemplary embodiments of the present application and their descriptions are used to explain the present application and do not constitute a limitation of the present application. In each figure, the same reference numerals represent the same components.
[0017] Figure 1 This is a cross-sectional view of the sealing joint in Example 1.
[0018] Figure 2 This is a cross-sectional view of the welding of the sealing joint and the composite pipe in Example 1.
[0019] Figure 3 This is a cross-sectional view of the wiring structure in Example 2.
[0020] Figure 4 This is a schematic diagram of the installation of the wiring structure in Example 2.
[0021] The figure marks in the above drawings are: 1-composite pipe, 2-connector body, 3-heating wire, 4-wiring structure, 41-connection post, 42-annular limiting boss, 43-sealing gasket, 44-sealing ring installation cavity, 45-sealing ring, 46-threaded hole, 47-screw, 5-annular shoulder, 51-fixing hole, 52-protective cylinder, 53-protective cover, 6-drainage chamfer. DETAILED DESCRIPTION
[0022] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings 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 in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.
[0023] It should be noted that, if the description and claims of the present application and the above-mentioned drawings relate to the terms "first", "second", etc., they are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein. In addition, if the terms "including" and "having" and any of their variations are involved, it is intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.
[0024] In this application, when terms such as "upper," "lower," "left," "right," "front," "back," "top," "bottom," "inside," "outside," "center," "vertical," "horizontal," "transverse," and "longitudinal" are used, the orientations or positional relationships they indicate are based on the orientations or positional relationships shown in the accompanying drawings. These terms are primarily intended to better describe this application and its embodiments and are not intended to limit the devices, elements, or components indicated to having a specific orientation, or to being constructed or operated in a specific orientation.
[0025] Furthermore, some of the above terms may be used to express other meanings besides indicating a position or location. For example, the term "on" may also be used to indicate a dependency or connection in certain circumstances. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.
[0026] Furthermore, in this application, the terms "installed," "disposed," "provided with," "connected," "connected," and "socketed" should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integral structures; mechanical connections or electrical connections; direct connections, indirect connections through an intermediary, or internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.
[0027] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.
[0028] Example 1
[0029] like Figure 1 As shown, this embodiment discloses a sealing joint, which includes a joint body 2. The joint body 2 is a tube made of thermoplastic plastic, with a connecting end and a socket end at each end. The connecting end of the joint body 2 is provided with an annular shoulder 5, which protrudes toward the side away from the central axis of the joint body 2, as shown in FIG. Figure 1 shown.
[0030] In addition, two wiring structures 4 are provided on the annular shoulder 5 , and a heating wire 3 is embedded in the outer surface of the joint body 2 , with both ends of the heating wire 3 connected to the two wiring structures 4 respectively.
[0031] Specifically, in this embodiment, the wiring structure 4 includes a terminal 41 whose lower end is inserted into the annular shoulder 5 , and the heating wire 3 is connected to the lower end of the terminal 41 .
[0032] Through the above structure, when connecting, the joint body 2 is inserted into the composite pipe 1, and the side of the annular shoulder 5 is in close contact with the end face of the composite pipe 1. The external power supply equipment energizes the heating wire 3 through the two terminals 41, causing the heating wire 3 to heat up, thereby fusing the outer surface of the joint body 2 and the inner surface of the composite pipe 1 together. The presence of the joint body 2 can increase the radial compressive strength of the composite pipe 1 connection. The annular shoulder 5 plays a role in sealing the end face of the composite pipe 1. At the same time, the annular shoulder 5 also facilitates the connection between the two composite pipes 1. Figure 2 shown.
[0033] In the specific setting, the side of the annular shoulder 5 close to the end face of the composite pipe 1 can also be embedded with a heating wire. When heated, the side of the annular shoulder 5 can be welded together with the inner and outer thermoplastic plastic layers of the composite pipe 1 to further improve the sealing performance.
[0034] In addition, the end surface of the socket end of the joint body 2 forms a drainage chamfer 6, as shown in FIG. Figure 2 As shown, the diversion chamfer 6 can guide the flowing fluid toward the central axis of the joint body 2, thereby reducing the impact of the fluid on the end surface of the joint body 2.
[0035] Example 2
[0036] The sealing joint disclosed in this embodiment is basically the same as that in embodiment 1, except that Figure 3 、 4As shown, the wiring structure 4 in this embodiment includes a terminal 41; a threaded hole 46 is provided at the lower end of the terminal 41, and a screw 47 is connected to the threaded hole 46. The screw 47 can be removed from the threaded hole 46. The annular shoulder 5 is provided with a fixing hole 51, and the lower end of the terminal 41 is inserted into the fixing hole 51.
[0037] During the specific setting, the end of the heating wire 3 is passed through the fixing hole 51, the screw 47 is loosened, the end of the heating wire 3 is wrapped around the screw 47, and then the screw is tightened to fix the end of the heating wire 3 between the screw cap of the screw 47 and the bottom of the terminal 41. Finally, the lower end of the terminal 41 is inserted into the fixing hole 51. The diameter of the terminal 41 is slightly larger than the diameter of the fixing hole 51. Because the annular shoulder 5 is made of plastic, the terminal 41 can be inserted into the fixing hole 51 under the action of an external force, and there is an interference fit between the terminal 41 and the fixing hole 51, so the terminal 41 is not easily dislodged from the fixing hole 51.
[0038] In addition, an annular limiting boss 42 is provided on the terminal 41 . When the lower end of the terminal 41 is inserted into the fixing hole 51 , the annular limiting boss 42 is in close contact with the surface of the annular shoulder 5 to limit the terminal 41 .
[0039] A sealing gasket 43 is provided between the annular limiting boss 42 and the surface of the annular shoulder 5. The sealing gasket 43 can be mounted on the terminal 41 before the terminal 41 is installed. By providing the sealing gasket 43, a seal can be formed between the annular limiting boss 42 and the surface of the annular shoulder 5.
[0040] In addition, the terminal 41 may be provided with a sealing ring installation cavity 44, in which a sealing ring 45 is installed. The sealing ring 45 can form a seal between the terminal 41 and the hole wall of the fixing hole 51. The provision of the sealing gasket 43 and the sealing ring 45 can prevent water from seeping into the fixing hole 51 and contacting the heating wire.
[0041] like Figure 4 As shown, the annular shoulder 5 is provided with a protective tube 52 that surrounds the outside of the terminal 41. The protective tube 52 is covered with a protective cover 53. The terminal 41 is sealed in a protective cavity enclosed by the protective tube 52 and the protective cover 53, thereby protecting the terminal 41. The protective cover 53 can be removed from the protective tube 52, thereby exposing the upper end of the terminal 41, facilitating connection of the terminal 41 to an external power supply device.
[0042] It should be noted that all features disclosed in this specification, or steps in all methods or processes disclosed, except for mutually exclusive features and / or steps, can be combined in any manner.
[0043] In addition, the above-mentioned specific embodiments are merely illustrative. Those skilled in the art may devise various solutions based on the disclosure of this utility model, and such solutions fall within the scope of disclosure and the scope of protection of this utility model. Those skilled in the art should understand that the specification and drawings of this utility model are illustrative and do not constitute limitations of the claims. The scope of protection of this utility model is defined by the claims and their equivalents.
Claims
1. A sealing joint, characterized in that: The invention comprises a connector body (2); a connecting end of the connector body (2) is provided with an annular shoulder (5), and two wiring structures (4) are provided on the annular shoulder (5); a heating wire (3) is embedded in the outer surface of the connector body (2), and the two ends of the heating wire (3) are respectively connected to the two wiring structures (4).
2. The sealing joint according to claim 1, characterized in that: The wiring structure (4) comprises a wiring post (41) whose lower end is inserted into the annular shoulder (5), and the heating wire (3) is connected to the lower end of the wiring post (41).
3. The sealing joint according to claim 1, characterized in that: The end surface of the socket end of the joint body (2) forms a drainage chamfer (6).
4. The sealing joint according to claim 1, characterized in that: The wiring structure (4) includes a terminal (41); a threaded hole (46) is provided at the lower end of the terminal (41), and a screw (47) is connected inside the threaded hole (46); a fixing hole (51) is provided on the annular shoulder (5), the lower end of the terminal (41) is inserted into the fixing hole (51), and the end of the heating wire (3) is fixed between the screw cap of the screw (47) and the bottom of the terminal (41).
5. The sealing joint according to claim 4, characterized in that: An annular limiting boss (42) is provided on the terminal post (41), and the annular limiting boss (42) is in close contact with the surface of the annular shoulder (5).
6. The sealing joint according to claim 5, characterized in that: A sealing gasket (43) is provided between the annular limiting shoulder (42) and the surface of the annular shoulder (5).
7. The sealing joint according to claim 6, characterized in that: A sealing ring installation cavity (44) is provided on the terminal post (41), and a sealing ring (45) is installed in the sealing ring installation cavity (44).
8. The sealing joint according to any one of claims 2, 4 to 7, characterized in that: The annular shoulder (5) is provided with a protective tube (52) enclosing the outside of the terminal (41), and the protective tube (52) is covered with a protective cover (53).