Low-temperature-resistant anti-frost-crack PVC pipe fitting
By using a combination of PVC resin, glass fiber and polyethylene materials in the PVC straight connector, combined with corrugated reinforcing ribs and thermal insulation design, the problem of PVC straight connectors being prone to freezing and cracking at low temperatures is solved, achieving higher durability and freeze resistance.
Patent Information
- Application Number
- CN202520491541.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-19
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2035-03-19
AI Technical Summary
Existing PVC straight connectors are prone to freezing at low temperatures, which reduces their toughness and makes them susceptible to cracks or breaks, resulting in pipe connection failure.
The structure features an inner layer of PVC resin, a reinforcing layer of fiberglass, and a protective layer of polyethylene. It is equipped with corrugated reinforcing ribs, insulation cotton sleeves, and an outer tube, all combined using threaded connection components. This design enhances compressive, bending, and tensile strength, reduces frost heave stress, and improves antifreeze performance.
It significantly improves the durability and impact resistance of PVC straight connectors, extends their service life, and reduces usage costs and the risk of freezing and cracking.
Smart Images
Figure CN223740247U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of plastic pipe technology, and more specifically, it relates to a low-temperature resistant and freeze-crack-proof PVC pipe fitting. Background Technology
[0002] PVC pipe fittings are pipe connection components made of polyvinyl chloride material. They are widely used in various piping systems, such as water pipes, drainage pipes, gas pipelines, and power pipelines. They can connect two pipe sections together. Common types of fittings include straight fittings, threaded fittings, and quick-connect fittings.
[0003] Based on the above, the inventors have discovered the following problems: During use, most existing plastic straight connectors will freeze inside at low temperatures, which will reduce the toughness of the PVC pipe fittings and make them prone to cracks or breaks, resulting in ruptures in the PVC pipe connection and causing losses.
[0004] Therefore, in view of this, we have studied and improved the existing structure and its shortcomings, and provided a low-temperature resistant and freeze-crack-proof PVC pipe fitting in order to achieve a more practical value. Utility Model Content
[0005] The purpose and effect of this utility model of a low-temperature resistant and freeze-crack-proof PVC pipe fitting are achieved by the following specific technical means:
[0006] A low-temperature resistant and freeze-crack-resistant PVC pipe fitting includes a PVC straight connector. The PVC straight connector includes an inner layer, a reinforcing layer, and a protective layer. The reinforcing layer is provided on the outer side of the inner layer, and the protective layer is provided on the outer side of the reinforcing layer. A protective component is installed around the periphery of the PVC straight connector.
[0007] Furthermore, the inner layer is made of PVC resin.
[0008] Furthermore, the reinforcing layer is made of glass fiber.
[0009] Furthermore, the protective layer is made of polyethylene.
[0010] Furthermore, the periphery of the PVC straight connector is provided with corrugated reinforcing ribs.
[0011] Furthermore, the protective component includes an insulating cotton sleeve, an outer tube, and an annular connecting cap. The insulating cotton sleeve is fitted around the PVC straight connector, and the outer tube is fitted around the insulating cotton sleeve.
[0012] Furthermore, the PVC straight connector has an external thread at both ends, the annular connecting cover has an internal thread at the inside, the annular connecting cover has a connecting groove on one side, the connecting groove has an internal thread at the inside, and the outer tube has an external thread at both ends. The PVC straight connector is threaded to the annular connecting cover through the external thread, and the outer tube is threaded to the annular connecting cover through the external thread.
[0013] Compared with the prior art, the present invention has the following beneficial effects:
[0014] The inner layer is made of PVC resin, which has good corrosion resistance, stain resistance and chemical resistance, thus extending the service life of the PVC straight connector.
[0015] By using a reinforcing layer made of fiberglass, the compressive, bending, and tensile strength of the PVC straight connector can be significantly improved without adding excessive weight.
[0016] By using polyethylene as the protective layer material, the chemical resistance and high toughness of polyethylene can enhance the durability and impact resistance of PVC straight connectors.
[0017] By using corrugated reinforcing ribs, the periodic undulating structure of the corrugations can disperse localized concentrated stress to the entire pipe wall, reducing the circumferential stress caused by frost heave, extending service life and improving performance.
[0018] By using the insulation cotton sleeve and the outer tube together, the insulation cotton sleeve can prevent condensation on the PVC straight connector and improve the antifreeze effect, while the outer tube provides overall protection for the PVC straight connector and reduces the cost of using the PVC straight connector.
[0019] By using the combination of external thread one, external thread two, internal thread one, internal thread two, connecting groove and annular connecting cover, the PVC straight connector is threaded to the internal thread one of the annular connecting cover through external thread one, and the outer tube is threaded to the internal thread two of the annular connecting cover through external thread two. The two ends of the outer tube are located in the connecting groove. In case of damage to the outer tube, the outer tube can be disassembled by rotating the annular connecting cover at both ends, which reduces the cost of use. Attached Figure Description
[0020] Figure 1 This is a three-dimensional schematic diagram of a low-temperature resistant and freeze-crack-proof PVC pipe fitting according to this utility model.
[0021] Figure 2 This is a cross-sectional view of the main body of a low-temperature resistant and freeze-crack-proof PVC pipe fitting according to this utility model.
[0022] Figure 3This is one of the explosion diagrams of a low-temperature resistant and freeze-crack-proof PVC pipe fitting according to this utility model.
[0023] Figure 4 This is the second of the explosion diagrams for a low-temperature resistant and freeze-proof PVC pipe fitting of this utility model.
[0024] In the diagram, the correspondence between component names and drawing numbers is as follows:
[0025] 1. PVC straight connector; 2. Corrugated reinforcing rib; 3. Insulation cotton sleeve; 4. Outer tube; 5. Ring-shaped connecting cap; 6. External thread one; 7. External thread two; 8. Connecting groove; 9. Internal thread one; 10. Internal thread two; 11. Inner layer; 12. Reinforcing layer; 13. Protective layer. Detailed Implementation
[0026] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.
[0027] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In addition, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0028] In the description of this utility model, 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 this utility model based on the specific circumstances.
[0029] Example:
[0030] As attached Figure 1 To be continued Figure 4 As shown:
[0031] This utility model provides a low-temperature resistant and freeze-crack-proof PVC pipe fitting, including a PVC straight connector 1. The PVC straight connector 1 includes an inner layer 11, a reinforcing layer 12 and a protective layer 13. The reinforcing layer 12 is provided on the outer side of the inner layer 11, and the protective layer 13 is provided on the outer side of the reinforcing layer 12. A protective component is installed on the periphery of the PVC straight connector 1.
[0032] The inner layer 11 is made of PVC resin. PVC resin has good corrosion resistance, stain resistance and chemical resistance, which extends the service life of the PVC straight connector 1.
[0033] The reinforcing layer 12 is made of glass fiber. By using the reinforcing layer 12, the glass fiber can significantly improve the compressive, bending and tensile strength of the PVC straight connector 1, without adding too much weight.
[0034] The protective layer 13 is made of polyethylene. By using polyethylene as the material for the protective layer 13, the chemical corrosion resistance and high toughness of polyethylene can enhance the durability and impact resistance of the PVC straight connector 1.
[0035] The PVC straight connector 1 is provided with corrugated reinforcing ribs 2 on its periphery. By using the corrugated reinforcing ribs 2, the periodic undulation structure of the corrugations can disperse the local concentrated stress to the entire pipe wall, thereby reducing the circumferential stress caused by frost heave, extending the service life and improving the performance.
[0036] The protective components include an insulation cotton sleeve 3, an outer tube 4, and an annular connecting cap 5. The insulation cotton sleeve 3 is fitted around the PVC straight connector 1, and the outer tube 4 is fitted around the insulation cotton sleeve 3. Through the cooperation between the insulation cotton sleeve 3 and the outer tube 4, the insulation cotton sleeve 3 can prevent condensation on the PVC pipe fittings and improve the antifreeze effect. The outer tube 4 provides overall protection for the PVC straight connector 1, reducing the usage cost of the PVC straight connector 1.
[0037] The PVC straight connector 1 has an external thread 6 at both ends, the annular connecting cover 5 has an internal thread 9 on its inner side, a connecting groove 8 on one side of the annular connecting cover 5, an internal thread 10 on the inner side of the connecting groove 8, and an external thread 7 at both ends of the outer tube 4. The PVC straight connector 1 is threaded to the internal thread 9 of the annular connecting cover 5 via the external thread 6, and the outer tube 4 is threaded to the internal thread 10 of the annular connecting cover 5 via the external thread 7. Through the cooperation of the external threads 6, 7, 9, 10, connecting groove 8, and annular connecting cover 5, the PVC straight connector 1 is threaded to the internal thread 9 of the annular connecting cover 5 via the external thread 6, and the outer tube 4 is threaded to the internal thread 10 of the annular connecting cover 5 via the external thread 7. The two ends of the outer tube 4 are located in the connecting groove 8. In case of damage to the outer tube 4, the annular connecting cover 5 at both ends can be rotated to disassemble the outer tube 4, reducing the cost of use.
[0038] The specific usage and function of this embodiment are as follows:
[0039] First, check the integrity of the device. Only use it after confirming it is intact. During use, first place the insulation cotton sleeve 3 around the PVC straight connector 1. The insulation cotton sleeve 3 prevents condensation on the PVC pipe fittings and improves the antifreeze effect. Then, place the outer pipe 4 over the surface of the insulation cotton sleeve 3. The PVC straight connector 1 is threaded to the annular connecting cap 5 via external thread 6 and internal thread 9. The outer pipe 4 is threaded to the annular connecting cap 5 via external thread 7 and internal thread 10. Both ends of the outer pipe 4 are located within the connecting groove 8. The inner layer 11 is made of PVC resin, which has good corrosion resistance, stain resistance, and chemical resistance, extending the service life of the PVC straight connector 1. The reinforcing layer 12 further enhances the performance of the device. Material 2 is made of glass fiber, which can significantly improve the compressive, bending and tensile strength of the pipe fittings without adding too much weight. The use of polyethylene as the material of the protective layer 13 enhances the durability and impact resistance of the PVC straight connector 1 due to the chemical corrosion resistance and high toughness of polyethylene. The use of corrugated reinforcing ribs 2 disperses localized stress concentration to the entire pipe wall through the periodic undulation structure of the corrugations, reducing the circumferential stress caused by frost heave, extending service life and improving performance. In the event of damage to the outer pipe 4, the outer pipe 4 can be disassembled by rotating the annular connecting caps 5 at both ends, reducing the cost of use. This device has a novel overall design and simple structure, and is therefore worthy of widespread promotion and use.
[0040] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.
Claims
1. A low-temperature-resistant, freeze-thaw-resistant PVC pipe fitting, comprising a PVC straight-through joint (1), characterized in that: The PVC straight joint (1) comprises an inner layer (11), a reinforcing layer (12) and a protective layer (13), the outer side of the inner layer (11) is provided with the reinforcing layer (12), the outer side of the reinforcing layer (12) is provided with the protective layer (13), and the peripheral side of the PVC straight joint (1) is provided with a protection assembly.
2. The low-temperature-resistant, freeze-thaw-resistant PVC pipe fitting of claim 1, wherein: The material of the inner layer (11) is PVC resin.
3. The low temperature resistant, freeze-thaw resistant PVC pipe fitting of claim 2, wherein: The material of the reinforcing layer (12) is glass fiber.
4. The low temperature resistant, freeze-thaw resistant PVC pipe fitting of claim 3, wherein: The material of the protective layer (13) is polyethylene.
5. The low-temperature resistant and freeze-crack-resistant PVC pipe fitting as described in claim 4, characterized in that: The periphery of the PVC straight joint (1) is provided with a corrugated reinforcing rib (2).
6. The low temperature resistant, freeze-thaw resistant PVC pipe fitting of claim 5, wherein: The protection assembly comprises a heat preservation cotton cover (3), an outer tube (4) and a ring-shaped connecting cover (5), the heat preservation cotton cover (3) is sleeved on the periphery of the PVC straight joint (1), and the outer tube (4) is sleeved on the periphery of the heat preservation cotton cover (3).
7. The low temperature resistant, freeze-thaw resistant PVC pipe fitting of claim 6, wherein: One pair of outer threads (6) are arranged at the two ends of the PVC straight joint (1), the inner side of the ring-shaped connecting cover (5) is provided with inner threads (9), one side of the ring-shaped connecting cover (5) is provided with a connecting groove (8), the inner side of the connecting groove (8) is provided with inner threads (10), and the periphery of the outer tube (4) is provided with one pair of outer threads (7); the PVC straight joint (1) is threadedly connected with the inner threads (9) of the ring-shaped connecting cover (5) through the outer threads (6), and the outer tube (4) is threadedly connected with the inner threads (10) of the ring-shaped connecting cover (5) through the outer threads (7).