Gear ring clamping and pressing steel-plastic conversion joint
The toothed ring crimped steel-plastic conversion joint connects the steel gas pipe through a crimping tool, which solves the safety hazard of welding igniting gas, achieves a safe and reliable connection and enhances the tensile strength.
Patent Information
- Application Number
- CN202423316817.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-12-31
AI Technical Summary
During the gas pipeline docking process, the welding operation of the steel-plastic conversion joint can easily ignite the gas, posing a safety hazard.
The steel-plastic conversion joint uses a toothed ring press-fitting tool to connect the first pipe made of steel material to the steel gas pipe, avoiding welding operations. The combination structure of sealing ring, retaining ring and toothed ring achieves sealing and fastening.
No welding is required, which eliminates the potential safety hazard of gas ignition and improves the safety and tensile strength of the connection.
Smart Images
Figure CN223483719U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of steel-plastic conversion joints, and more specifically, to a toothed ring press-fit steel-plastic conversion joint. Background Technology
[0002] Currently, steel-plastic conversion joints are often used in the process of connecting gas pipelines. One end of the steel-plastic conversion joint is connected and fixed to the other end of the pipe fitting by heat fusion and circumferential sealing. The other end of the steel-plastic conversion joint needs to be welded and fixed with a flange and connected to the steel gas pipeline through the flange. In the above process, because a fixed flange needs to be welded and fixed to the other end of the steel-plastic conversion joint, the gas can easily be ignited during construction, which poses a significant safety hazard. Utility Model Content
[0003] The technical problem to be solved by this utility model is to provide a toothed ring press-fit steel-plastic conversion connector, which eliminates the need for welding when connecting with a steel gas pipe, thereby effectively preventing the gas from being ignited and eliminating safety hazards.
[0004] This utility model provides a toothed ring press-fit steel-plastic conversion joint, including a first pipe made of steel and a second pipe made of PE plastic. One end of the first pipe and one end of the second pipe are connected and fixed together by a steel-plastic composite pipe fitting and circumferentially sealed. The other end of the first pipe is used to press-fit and fix one end of a gas pipe made of steel and circumferentially sealed, and the other end of the second pipe is used to heat-melt fix and circumferentially seal one end of a plastic pipe fitting made of PE plastic. The other end of the first pipe forms a press-fit socket, and a sealing ring, a retaining ring, and a toothed ring are sequentially embedded in the inner side of the press-fit socket from the inside to the outside. The sealing ring, retaining ring, and toothed ring are axially limited inside the press-fit socket. When one end of the gas pipe made of steel is inserted into the press-fit socket, and after the press-fit socket is pressed by a press-fit tool, the sealing ring is used to seal the gap between the gas pipe and the press-fit socket, and the toothed ring is used to engage the gas pipe to secure the gas pipe to the first pipe.
[0005] By adopting the above structure, the first pipe made of steel can be connected and fixed to the gas pipe made of steel by clamping and sealing in a circumferential manner, without the need for welding, thereby effectively preventing the gas from being ignited and eliminating safety hazards.
[0006] In one possible implementation, an annular step is provided on the inner wall of the press-fit socket, the outer edge of the sealing ring abuts against the annular step, and an annular fold is provided on the outer end of the press-fit socket. The annular fold is folded inward along the radial direction of the first pipe, and the outer edge of the toothed ring abuts against the annular fold. The sealing ring, the retaining ring, and the toothed ring are axially limited between the annular step and the annular fold. With this structure, under the action of the annular step and the annular fold, the sealing ring, the retaining ring, and the toothed ring can be reliably axially limited on the inner side of the press-fit socket.
[0007] In one possible implementation, the annular fold gradually slopes towards one side of the first pipe from the outside to the inside along the radial direction of the first pipe, forming an inverted structure. When the crimping socket is crimped by a crimping tool, the inner edge of the annular fold is used to engage and tighten with the outer wall of the gas pipe. By adopting the above structure, since the annular fold gradually slopes towards one side of the first pipe from the outside to the inside along the radial direction of the first pipe, forming an inverted structure, and when the crimping socket is crimped by a crimping tool, the inner edge of the annular fold can engage and tighten with the outer wall of the gas pipe. Thus, when the crimping socket is crimped by a crimping tool, the annular fold can not only restrict the axial movement of the toothed ring, but also increase the contact area between the crimping socket and the gas pipe, strengthen the fastening effect, and make the crimping socket and the toothed ring tightly pressed into one piece with the gas pipe, thereby improving the tensile strength of the first pipe and the gas pipe.
[0008] In one possible implementation, a plurality of locking teeth are provided on the inner end of the toothed ring in the axial direction, spaced apart along the circumference of the toothed ring. Each locking tooth is bent from the outside to the inside in the radial direction of the toothed ring to form a barb structure. With this structure, when the locking tool presses the locking socket to squeeze the locking socket and make the locking teeth on the toothed ring press against the outer wall of the gas pipe, since each locking tooth forms a barb structure from the outside to the inside in the radial direction of the toothed ring, the locking teeth and the outer wall of the gas pipe can be tightly engaged and locked to form a buckle structure, thereby improving the tensile strength of the first pipe and the gas pipe.
[0009] In one possible implementation, annular notches are provided on both sides of the outer edge of the retaining ring in the axial direction of the retaining ring. With this structure, when the clamping tool clamps the clamping socket to compress the sealing ring, retaining ring and toothed ring, the annular notch on the sealing ring side can avoid the sealing ring to prevent the retaining ring from damaging the sealing ring, and the annular notch on the toothed ring side can avoid the toothed ring to prevent the retaining ring from damaging the toothed ring.
[0010] In one possible implementation, an annular rib is provided on the inner edge of the sealing ring and at the center in the axial direction of the sealing ring. The axial section of the inner edge of the annular rib forms an arc surface, and annular grooves are formed on both sides of the annular rib in the axial direction. With this structure, after one end of the gas pipe is inserted into the sealing ring and pressed by a pressing tool at the pressing socket, the annular rib can be better deformed and tightly attached to the outer wall of one end of the gas pipe under the action of the annular grooves on both sides. That is, the inner edge of the sealing ring can be reliably and tightly sealed to the outer wall of one end of the gas pipe, thereby improving the sealing effect between the first pipe and the gas pipe. In addition, since the axial section of the inner edge of the annular rib forms an arc surface, one end of the gas pipe can pass through the sealing ring more smoothly. Attached Figure Description
[0011] Figure 1 This is a partial cross-sectional structural diagram of the present invention;
[0012] Figure 2 for Figure 1 A magnified structural diagram of point A in the middle;
[0013] Figure 3 This is a schematic diagram of the toothed ring from the left view.
[0014] Figure 4 This is a schematic diagram of the cross-sectional structure of the toothed ring. Detailed Implementation
[0015] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.
[0016] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.
[0017] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0018] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.
[0019] See Figure 1-4 As shown in the embodiment of this application, a toothed ring press-fit steel-plastic conversion joint is disclosed, including a first pipe 1 made of steel and a second pipe 2 made of PE plastic. One end of the first pipe 1 and one end of the second pipe 2 are connected and fixed to each other by a steel-plastic composite pipe fitting 3 and are circumferentially sealed. The other end of the first pipe 1 is used to press-fit and fix to one end of a gas pipe made of steel and circumferentially sealed, and the other end of the second pipe 2 is used to heat-melt and fix to one end of a plastic pipe fitting made of PE plastic and circumferentially sealed. The other end of the first pipe 1 forms a crimping socket 11. A sealing ring 4, a retaining ring 5, and a toothed ring 6 are sequentially embedded in the inner side of the crimping socket 11 from the inside out. The sealing ring 4, the retaining ring 5, and the toothed ring 6 are axially limited inside the crimping socket 11. When one end of the gas pipe made of steel is inserted into the crimping socket 11, and after the crimping socket 11 is crimped by a crimping tool, the sealing ring 4 is used to seal the gap between the gas pipe and the crimping socket 11, and the toothed ring 6 is used to engage the gas pipe to secure the gas pipe to the first pipe 1.
[0020] An annular step 12 is provided on the inner wall of the press-fit socket 11. The outer edge of the sealing ring 4 abuts against the annular step 12. An annular flange 13 is provided on the outer end of the press-fit socket 11. The annular flange 13 is folded inward along the radial direction of the first pipe 1. The outer edge of the toothed ring 6 abuts against the annular flange 13. The sealing ring 4, the retaining ring 5, and the toothed ring 6 are axially limited between the annular step 12 and the annular flange 13. With this structure, under the action of the annular step and the annular flange, the sealing ring, the retaining ring, and the toothed ring can be reliably axially limited on the inner side of the press-fit socket.
[0021] The annular flange 13 gradually inclines towards one side of the first pipe 1 from the outside to the inside along the radial direction of the first pipe 1, forming an inverted structure. When the crimping socket 11 is crimped by the crimping tool, the inner edge of the annular flange 13 is used to engage and tighten with the outer wall of the gas pipe. By adopting the above structure, since the annular flange gradually inclines towards one side of the first pipe from the outside to the inside along the radial direction of the first pipe and forms an inverted structure, and when the crimping socket is crimped by the crimping tool, the inner edge of the annular flange can engage and tighten with the outer wall of the gas pipe. Thus, when the crimping socket is crimped by the crimping tool, the annular flange can not only restrict the axial movement of the toothed ring, but also increase the contact area between the crimping socket and the gas pipe, strengthen the fastening effect, and make the crimping socket and the toothed ring tightly pressed into one piece with the gas pipe, which can improve the tensile strength of the first pipe and the gas pipe.
[0022] The inner end of the toothed ring 6 in the axial direction is provided with a number of locking teeth 61 that are spaced apart along the circumference of the toothed ring 6. Each locking tooth 61 is bent from the outside to the inside along the radial direction of the toothed ring 6 to form a barb structure. With this structure, when the locking tool presses the locking socket to squeeze the toothed ring and make the locking teeth on the toothed ring press against the outer wall of the gas pipe, since each locking tooth forms a barb structure from the outside to the inside along the radial direction of the toothed ring, the locking teeth and the outer wall of the gas pipe can be tightly engaged and locked to form a buckle structure, thereby improving the tensile strength of the first pipe and the gas pipe.
[0023] An annular notch 51 is provided on both sides of the outer edge of the retaining ring 5 in the axial direction of the retaining ring 5. With this structure, when the clamping tool clamps the clamping socket so that the clamping socket squeezes the sealing ring, the retaining ring and the toothed ring, the annular notch on the sealing ring side can avoid the sealing ring to prevent the retaining ring from damaging the sealing ring, and the annular notch on the toothed ring side can avoid the toothed ring to prevent the retaining ring from squeezing and damaging the toothed ring.
[0024] An annular rib 41 is provided on the inner edge of the sealing ring 4 and at the center of the axial direction of the sealing ring 4. The axial section of the inner edge of the annular rib 41 forms an arc surface, and annular grooves 42 are formed on both sides of the annular rib 41 in the axial direction. With this structure, after one end of the gas pipe is inserted into the sealing ring and after being pressed by the pressing tool at the pressing socket, the annular rib can be better deformed and tightly attached to the outer wall of one end of the gas pipe under the action of the annular grooves on both sides of the annular rib. That is, the inner edge of the sealing ring can be reliably and tightly sealed to the outer wall of one end of the gas pipe, thereby improving the sealing effect between the first pipe and the gas pipe. In addition, since the axial section of the inner edge of the annular rib forms an arc surface, one end of the gas pipe can pass through the sealing ring more smoothly.
[0025] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.
Claims
1. A toothed ring press-fit steel-plastic conversion joint, comprising a first pipe (1) made of steel and a second pipe (2) made of PE plastic; one end of the first pipe (1) and one end of the second pipe (2) are connected and fixed to each other by a steel-plastic composite fitting (3) and circumferentially sealed; the other end of the first pipe (1) is used to press-fit and fix to one end of a gas pipe made of steel and circumferentially sealed, and the other end of the second pipe (2) is used to heat-melt and fix to one end of a plastic fitting made of PE plastic and circumferentially sealed; characterized in that: The other end of the first pipe (1) forms a crimping socket (11). The inner side of the crimping socket (11) is fitted with a sealing ring (4), a retaining ring (5) and a toothed ring (6) from the inside out. The sealing ring (4), the retaining ring (5) and the toothed ring (6) are axially limited to the inner side of the crimping socket (11). When one end of the gas pipe made of steel is inserted into the crimping socket (11), and after the crimping socket (11) is crimped by a crimping tool, the sealing ring (4) is used to seal the gap between the gas pipe and the crimping socket (11), and the toothed ring (6) is used to engage the gas pipe to make the gas pipe secure to the first pipe (1).
2. The toothed ring press-fit steel-plastic conversion joint according to claim 1, characterized in that: An annular step (12) is provided on the inner wall of the crimping socket (11). The outer edge of the sealing ring (4) abuts against the annular step (12). An annular fold (13) is provided on the outer end of the crimping socket (11). The annular fold (13) is folded inward along the radial direction of the first pipe (1). The outer edge of the toothed ring (6) abuts against the annular fold (13). The sealing ring (4), the retaining ring (5), and the toothed ring (6) are axially limited between the annular step (12) and the annular fold (13).
3. The toothed ring press-fit steel-plastic conversion joint according to claim 2, characterized in that: The annular fold (13) gradually tilts towards one side of the first pipe (1) from the outside to the inside along the radial direction of the first pipe (1) and forms an inverted structure. When the crimping socket (11) is crimped by the crimping tool, the inner edge of the annular fold (13) is used to engage and clamp with the outer wall of the gas pipe.
4. The toothed ring press-fit steel-plastic conversion joint according to any one of claims 1-3, characterized in that: The inner end of the toothed ring (6) in the axial direction is provided with a plurality of locking teeth (61) spaced apart along the circumferential direction of the toothed ring (6). Each locking tooth (61) is bent from the outside to the inside along the radial direction of the toothed ring (6) to form a barb structure.
5. The toothed ring press-fit steel-plastic conversion joint according to any one of claims 1-3, characterized in that: An annular notch (51) is provided on both sides of the outer edge of the retaining ring (5) in the axial direction.
6. The toothed ring press-fit steel-plastic conversion joint according to any one of claims 1-3, characterized in that: An annular rib (41) is provided on the inner edge of the sealing ring (4) and at the middle of the axial direction of the sealing ring (4). The axial section of the inner edge of the annular rib (41) forms an arc surface, and an annular groove (42) is formed on both sides of the annular rib (41) in the axial direction.