Injection molding pipe fitting
By employing inclined limiting rings and sealing rings in injection-molded pipe fittings, the problem of water leakage at the joints of plastic pipe fittings has been solved, achieving higher sealing performance and service life, and reducing maintenance costs.
Patent Information
- Application Number
- CN202520034672.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-07
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2035-01-07
AI Technical Summary
In the existing technology, the plug joints of plastic pipe fittings are prone to water leakage after long-term use, with poor sealing performance, which leads to easy damage at the connection and high maintenance costs.
Design an injection-molded pipe fitting with an inclined limiting ring and sealing ring structure. The limiting ring forms an acute angle with the vertical plane, and the sealing ring is located on one side of the limiting ring. The limiting ring is tilted and deformed by external force to fit tightly against the water pipe, thereby enhancing the connection sealing performance. Glue is added at the connection to further improve the sealing performance.
It improves the sealing performance of the connection between the fittings and the water pipe, reduces the probability of leakage, enhances the reliability and service life of the connection, and reduces maintenance costs.
Smart Images
Figure CN223768425U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of injection molded pipe fittings technology, and more specifically, to an injection molded pipe fitting. Background Technology
[0002] Plastic pipes are mainly used in building construction for water supply systems, drainage, ventilation, sewage, underground drainage systems, rainwater pipes, and conduits for electrical wiring. They are generally divided into two main categories: thermoplastic pipes and thermosetting plastic pipes. Thermoplastic pipes include polyvinyl chloride (PVC), polyethylene (PE), polypropylene (PP), and polyoxymethylene (POM); thermosetting pipes include phenolic plastic pipes. There are various connection methods between plastic pipes and fittings, including threaded connections, flange connections, grooved clamp connections, compression fittings, heat fusion connections, welding, adhesive bonding, socket connections, and plug connections. Each of these methods has its advantages and disadvantages. In sewage and drainage systems, ordinary plug-in joints are generally used with adhesive to connect to water pipes. This type of connection is convenient and easy to construct, but the sealing at the connection point is relatively poor. After long-term use, the probability of leakage or seepage at the connection point is relatively high, which can easily cause property damage and result in higher maintenance costs. Utility Model Content
[0003] To overcome the shortcomings of ordinary plug-in connectors in the prior art, which are prone to leakage and seepage after long-term use and have poor sealing performance, this utility model provides an injection-molded pipe fitting that improves the sealing performance of the connection between the fitting and the water pipe and reduces the probability of leakage and seepage.
[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: an injection-molded pipe fitting, comprising: a pipe fitting body, a limiting ring disposed on the inner wall of the pipe fitting body, and a sealing ring disposed on the edge of the limiting ring, wherein the limiting ring is inclined and forms an x-angle with the vertical plane, the x-angle being an acute angle, and the sealing ring is disposed on the side where the x-angle is located.
[0005] The fitting body is tubular in shape. A limiting ring is located on the inner wall of the fitting body to limit the movement of the external water pipe. The limiting ring forms an X-angle with the vertical plane. Specifically, from an overall perspective, the limiting ring is annularly conical or annularly flared. From the axial cross-section of the fitting body, the cross-section of the limiting ring is inclined, thus forming an X-angle with the vertical plane. A sealing ring is located at the edge of the limiting ring to further enhance the sealing of the connection between the fitting and the water pipe. The sealing ring is located on the side where the X-angle is located, i.e., the sealing ring... The protrusion extends to the side where the x-angle is located. When using this injection-molded pipe fitting, to connect the external water pipe to the fitting, first insert a single external water pipe from the side furthest from the x-angle. Once the edge of the external water pipe end face on this side abuts against the edge of the limiting ring, it is fully inserted. At this point, there is a gap between the external water pipe and the limiting ring; the angle of the gap plus the angle of the x-angle equals 90°. After connecting the external water pipe on this side, connect the external water pipe from the side where the x-angle is located. Because the limiting ring is inclined and the sealing ring is set... On one side of the limiting ring, the limiting ring and the sealing ring form a bayonet-like structure on the side where the x-angle is located. The external water pipe on this side will be squeezed or blocked by the limiting ring and the sealing ring at the same time. During the insertion process, the limiting ring tilts under the action of external force until both sides of the limiting ring are completely in contact with the end faces of the two external water pipes. At this time, the angle formed by the limiting ring and the vertical plane is 90°, which completes the connection of the external water pipe. Due to the deformation of the limiting ring under the action of external force, there is stress on the limiting ring after the connection. Under the action of stress, the limiting ring and the sealing ring will be tightly attached to the external water pipe on the side of the x-angle, thereby improving the connection sealing performance. Specifically, the outer side of the sealing ring should be tightly attached to the outer surface of the external water pipe after the connection is made. When using, the sealing ring should be set downward to prevent water from seeping into the connection, improve the resistance of the connection to water flow impact, improve the sealing performance of the connection, and reduce the chance of leakage. At the same time, additional glue will be added to the connection of the external water pipe to fully ensure the connection sealing and the service life after the connection.
[0006] Preferably, the limiting ring can undergo elastic deformation under the action of external force.
[0007] By selecting appropriate injection molding materials and a suitable tilt angle for the limiting ring, the deformation of the limiting ring can be controlled within the elastic deformation range, thus ensuring and improving the service life of this injection molded pipe fitting.
[0008] Preferably, a first thickened ring is provided on the outer surface of the pipe body, and the first thickened ring circumferentially surrounds and covers the connection part between the limiting ring and the pipe body.
[0009] The first thickened ring is set around the periphery of the connection between the limiting ring and the pipe body, which enhances the connection strength between the limiting ring and the pipe body, further improving the overall service life of the injection molded pipe. It also facilitates the reduction of the wall thickness of other parts of the pipe body to a certain extent, thus ensuring the strength of key parts and reducing the material consumption required for the entire injection molded pipe, thereby reducing manufacturing costs.
[0010] Preferably, the thickness of the first thickened ring is greater than the thickness of the limiting ring.
[0011] The thickness of the first thickening ring is set to be greater than the thickness of the limiting ring to ensure the effectiveness of the first thickening ring setting.
[0012] Preferably, the x-angle ranges from greater than 78° to less than 90°.
[0013] To avoid excessive deformation of the limiting ring, the minimum value of the x-angle is set to 78°.
[0014] Preferably, the outer surface of the sealing ring forms a y-angle with the vertical plane, and the range of the y-angle meets the requirements of the demolding draft angle.
[0015] If the y-angle is too small, the injection-molded pipe fitting will not be able to be demolded. Therefore, the value range of the y-angle is controlled within the requirements of the demolding draft angle specification. The specific demolding draft angle is related to the protrusion height of the sealing ring, the tilt angle of the limiting ring, and the injection molding material used.
[0016] Preferably, the value of the y-angle is greater than 30′ and less than 1°30′.
[0017] In some product specifications, when the value of the y-angle is greater than 30′ and less than 1°30′, the quality and performance of the produced product are better.
[0018] Preferably, the inner side of the sealing ring forms a z-angle with the limiting ring, and the value of the z-angle is in the range of 85° to 90°.
[0019] The size of the z-angle affects the thickness of the sealing ring. When the strength of the sealing ring is sufficient, the z-angle is 90°. When the strength is insufficient, the thickness of the sealing ring is increased, and then the z-angle is reduced, so that the cross-section of the sealing ring is conical, ensuring the strength of the root of the sealing ring and reducing the thickness of the top of the sealing ring.
[0020] Preferably, the top of the sealing ring has a transition arc surface.
[0021] The design incorporates a smooth, curved surface to ensure a seamless connection of the external water pipes and prevent jamming.
[0022] Preferably, a second thickened ring is provided on the outer surface of each end of the pipe body.
[0023] The second thickened ring is used to increase the strength of both ends of the pipe body.
[0024] Compared with the prior art, the beneficial effects of this utility model are:
[0025] An inclined limiting ring is installed, and a sealing ring is then installed on the limiting ring. When connecting to an external water pipe, the limiting ring tilts under the thrust of the external water pipe until the x-angle changes from an acute angle to a right angle. At this time, there is stress inside the limiting ring, and the limiting ring and the sealing ring will fit tightly against the end and outer surface of the external water pipe, thereby improving the sealing performance of the connection. In actual use, this injection-molded pipe fitting is applied to vertically installed pipeline facilities, and the sealing ring is set downwards. This can prevent the downward water flow from impacting the connection between the pipe body and the external pipe, improving the reliability of the connection, and thus maintaining the sealing performance of the connection for a long time, avoiding water leakage. Attached Figure Description
[0026] Figure 1 This is a schematic diagram of the internal structure of an injection-molded pipe fitting according to this utility model;
[0027] Figure 2 yes Figure 1 Enlarged schematic diagram of part A;
[0028] Figure 3 This is a schematic diagram of one embodiment of the injection-molded pipe fitting of this utility model;
[0029] Figure 4 This is a schematic diagram of another embodiment of the injection-molded pipe fitting of this utility model.
[0030] In the diagram: 1. Pipe body; 2. Limiting ring; 3. Sealing ring; 4. First thickened ring; 5. Transition arc surface; 6. Second thickened ring. Detailed Implementation
[0031] The accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. To better illustrate this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting this patent.
[0032] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "long," and "short" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.
[0033] The technical solution of this utility model will be further described in detail below through specific embodiments and with reference to the accompanying drawings:
[0034] Example 1
[0035] like Figure 1-2 As shown, an injection-molded pipe fitting includes: a pipe fitting body 1, a limiting ring 2 disposed on the inner wall of the pipe fitting body 1, and a sealing ring 3 disposed on the edge of the limiting ring 2. The limiting ring 2 is inclined and forms an x-angle with the vertical plane, the x-angle being an acute angle, and the sealing ring 3 is disposed on the side where the x-angle is located.
[0036] The pipe fitting body 1 is tubular in shape, and the limiting ring 2 is set on the inner wall of the pipe fitting body 1 to limit the movement of the external water pipe, such as... Figure 2As shown, the limiting ring 2 forms an x-angle with the vertical plane. Specifically, from an overall perspective, the limiting ring 2 is generally an annular cone or annular trumpet shape. From the axial cross-section of the pipe body 1, the cross-section of the limiting ring 2 is inclined, thus forming an x-angle with the vertical plane. The sealing ring 3 is located at the edge of the limiting ring 2 to further enhance the sealing performance of the connection between the pipe fitting and the water pipe. The sealing ring 3 is located on the side where the x-angle is located, that is, the sealing ring 3 protrudes from the side where the x-angle is located. When this injection-molded pipe fitting is used, the outer... To connect the water pipe to this injection-molded fitting, first insert a single external water pipe from the side furthest from the x-angle. Once the edge of the external water pipe end face on this side abuts against the edge of the limiting ring 2, it is fully inserted. At this point, there is a gap between the external water pipe and the limiting ring 2. The angle of this gap plus the angle of the x-angle equals 90°. After connecting the external water pipe on this side, connect the external water pipe from the side where the x-angle is located. Because the limiting ring 2 is inclined and the sealing ring 3 is located on one side of the limiting ring 2, the limiting ring 2 and the sealing ring 3... A bayonet-like structure will form on the side where the x-angle is located. The external water pipe on this side will be squeezed or blocked by the limiting ring 2 and the sealing ring 3. During the insertion process, the limiting ring 2 will tilt under the action of external force until both sides of the limiting ring 2 are completely in contact with the end faces of the two external water pipes. At this time, the angle formed by the limiting ring 2 and the vertical plane is 90°, which completes the connection of the external water pipe. Due to the deformation of the limiting ring 2 under the action of external force, there is stress in the limiting ring 2 after the connection. Under the action of stress, the limiting ring 2 and the sealing ring 3 will be tightly attached to the external water pipe on the side of the x-angle, thereby improving the connection sealing performance. Specifically, the outer side of the sealing ring 3 should be tightly attached to the outer surface of the external water pipe after the connection is made. When using, the sealing ring 3 should be set downward to prevent water from seeping into the connection, improve the resistance of the connection to water flow impact, improve the sealing performance of the connection, and reduce the chance of leakage. At the same time, the connection of the external water pipe will also be additionally glued to fully ensure the connection sealing and the service life after the connection.
[0037] Figure 2 In this context, x refers to the x-angle mentioned above.
[0038] The beneficial effects of this embodiment are as follows: An inclined limiting ring 2 is provided, and a sealing ring 3 is then provided on the limiting ring 2. When connecting to an external water pipe, the limiting ring 2 tilts under the thrust of the external water pipe until the x-angle changes from an acute angle to a right angle. At this time, stress exists inside the limiting ring 2, and the limiting ring 2 and the sealing ring 3 will adhere tightly to the end and outer surface of the external water pipe, thereby improving the sealing performance of the connection. In actual use, this injection-molded pipe fitting is applied to vertically installed pipeline facilities, and the sealing ring 3 is set downwards. This prevents the downward flow of water from impacting the connection between the pipe fitting body 1 and the external pipe fitting, improving the reliability of the connection, and thus maintaining the sealing performance of the connection for a long time, avoiding leakage and seepage.
[0039] Example 2
[0040] The difference between Example 1 and Example 2 is as follows:
[0041] like Figure 1-3 As shown, the limiting ring 2 can undergo elastic deformation under external force. A first thickened ring 4 is provided on the outer surface of the pipe body 1, and the first thickened ring 4 circumferentially surrounds and covers the connection between the limiting ring 2 and the pipe body 1. The thickness of the first thickened ring 4 is greater than the thickness of the limiting ring 2. For example... Figure 2 As shown, the range of x-angle is greater than 78° and less than 90°.
[0042] By selecting appropriate injection molding materials and a suitable tilt angle for the limiting ring 2, the deformation of the limiting ring 2 is controlled within the elastic deformation range, ensuring and improving the service life of this injection molded pipe fitting. The first thickening ring 4 is arranged around the periphery of the connection between the limiting ring 2 and the pipe body 1, enhancing the connection strength between the limiting ring 2 and the pipe body 1, further improving the overall service life of this injection molded pipe fitting. It also facilitates a reduction in the wall thickness of other parts of the pipe body 1 to some extent, ensuring the strength of key components while reducing the overall material consumption and manufacturing cost of the injection molded pipe fitting. The thickness of the first thickening ring 4 is set to be greater than the thickness of the limiting ring 2 to ensure the effective setting of the first thickening ring 4. To avoid excessive deformation of the limiting ring 2, the minimum value of the x-angle is set to 78°.
[0043] The remaining features and working principles of this embodiment are the same as those of Embodiment 1.
[0044] Example 3
[0045] Based on Example 1 or Example 2, Example 1 or Example 2 are further defined, with the following differences:
[0046] like Figure 2 As shown, the outer surface of sealing ring 3 forms a y-angle with the vertical plane, and the value range of the y-angle meets the requirements of the draft angle. The value range of the y-angle is greater than 30′ and less than 1°30′. Figure 2 As shown, the inner surface of the sealing ring 3 forms a z-angle with the limiting ring 2, with the z-angle ranging from 85° to 90°. The top of the sealing ring 3 has a transition arc surface 5. Figure 4 As shown, a second thickened ring 6 is provided on the outer surface of both ends of the pipe body 1.
[0047] If the y-angle is too small, the injection-molded pipe fitting will be unable to be demolded. Therefore, the value of the y-angle is controlled within the requirements of the draft angle specification. The specific draft angle is related to the protrusion height of the sealing ring 3, the tilt angle of the limiting ring 2, and the injection molding material used. In some specifications, when the value of the y-angle is greater than 30′ and less than 1°30′, the quality and performance of the produced product are better. The size of the z-angle affects the thickness of the sealing ring 3. When the strength of the sealing ring 3 is sufficient, the z-angle is 90°. When the strength is insufficient, the thickness of the sealing ring 3 is increased, and then the z-angle angle is reduced, thereby making the cross-section of the sealing ring 3 conical, ensuring the strength of the root of the sealing ring 3, and reducing the thickness of the top of the sealing ring 3. The transition arc surface 5 is set to ensure smooth connection of the external water pipe and avoid jamming. The second thickened ring 6 is used to increase the strength of both ends of the pipe body 1.
[0048] Furthermore, in this embodiment, the value of the x-angle is greater than 78° and less than 82°.
[0049] Figure 2 In this context, x refers to the x-angle mentioned above, y refers to the y-angle mentioned above, and z refers to the z-angle mentioned above.
[0050] In this embodiment, the two ends of the pipe body 1 are respectively provided with second thickening rings 6, while the middle of the pipe body 1 is not provided with a first thickening ring 4. In actual use, there are some implementation issues, such as... Figure 3 As shown, the pipe body 1 is provided with a first thickening ring 4 and a second thickening ring 6.
[0051] The remaining working principles and processes of this embodiment are the same as those of Embodiment 1 or Embodiment 2.
[0052] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.
[0053] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. An injection molded pipe fitting, characterized by, The utility model relates to a pipe fitting body (1), the limiting ring (2) of setting in the inner wall of pipe fitting body (1), the sealing ring (3) of setting in the edge of limiting ring (2), limiting ring (2) is arranged and is with vertical plane forms x angle, x angle is acute angle, sealing ring (3) is arranged in the one side of x angle. The limiting ring (2) can be elastically deformed under external force.
2. A molded tubular according to claim 1, characterized in that: The first thickening ring (4) is arranged on the outer surface of the pipe fitting body (1).
3. A molded tubular according to claim 2, wherein: The thickness of the first thickening ring (4) is greater than the thickness of the limiting ring (2).
4. A molded tubular according to claim 3, wherein: The x angle is greater than 78° and less than 90°.
5. A molded tubular according to claim 1, wherein: The outer side of the sealing ring (3) forms a y angle with the vertical plane, and the value range of the y angle meets the demolding slope requirement.
6. A molded tubular according to claim 1, wherein: The y angle is greater than 30' and less than 1°30'.
7. A molded tubular according to claim 6, characterized in that: The inner side of the sealing ring (3) forms a z angle with the limiting ring (2), and the value range of the z angle is 85° to 90°.
8. A molded tubular according to claim 1, wherein: The sealing ring (3) is provided with an excessive cambered surface (5) at the top.
9. A molded tubular according to claim 1, wherein: Second thickening rings (6) are respectively arranged on the outer surfaces of both ends of the pipe fitting body (1).
10. A molded tubular according to claim 1, wherein: