Double bend pipe fitting with double sealing and backwater

Abstract

The utility model relates to pipe fitting technical field especially relates to a ring card double -sealed type with backwater double bend pipe fitting, including U bend, the U bend has the first short bend, the first short bend has the first connecting piece, the first connecting piece has the second connecting piece through the connecting piece fixed, the second connecting piece has the second short bend, the upper end of second short bend and the both ends of U bend are all fixed with ring card joint, the utility model discloses the setting, only need to insert hot water circulating pipe or cold water pipe into ring card joint in the installation time, and installation is convenient and high installation efficiency, in addition, also greatly improved the sealing performance of junction, through the setting of U bend, make hot water form the circulation state, can provide hot water in time, need not wait for cold water to discharge, save energy, reduce the waste of water resources.

Description

Technical Field

[0001] This utility model relates to the field of pipe fittings, and in particular to a ring clamp double-sealed double-bend pipe fitting with return water. Background Technology

[0002] Thin-walled stainless steel pipe fittings are widely used in domestic water supply systems. In residential water supply systems, especially in temperature-regulating valves for hot water and return water, traditional installations require numerous fittings for connection and fixation. This often leads to inconvenient installation and poor fixation, causing misalignment and affecting valve installation. For example, patent application CN201721679432.5 discloses a temperature-regulating valve for an asphalt heating vehicle. This valve suffers from the aforementioned drawbacks during installation, requiring multiple fittings to be connected and fixed via first, second, and third connectors. This is not only cumbersome and inefficient but also prone to misalignment. Furthermore, this connection method suffers from insufficient sealing, easy leakage, high installation requirements, and complex maintenance. Therefore, there is an urgent need for a pipe fitting that is easy to install and maintain, safe, stable, and has high sealing performance. Utility Model Content

[0003] (a) Technical problems to be solved In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a ring-clamp double-seal double-bend pipe fitting with return water, which solves the problems of the existing technology, not only facilitating installation and maintenance and improving the efficiency of installation and maintenance, but also greatly improving the sealing performance of the pipe fitting connection.

[0004] (II) Technical Solution

[0005] To achieve the above objectives, this utility model provides the following technical solution: a double-sealed pipe fitting with return water, comprising a U-shaped elbow, a first short elbow connected to the U-shaped elbow, a first connector connected to the first short elbow, a second connector fixed to the first connector via a connecting piece, a second short elbow connected to the second connector, and a ring clamp joint fixed to the upper end of the second short elbow and both ends of the U-shaped elbow.

[0006] Preferably, the ring clamp includes a first annular portion that is fixedly connected to the upper end of the second short elbow or to both ends of the U-shaped elbow. The first annular portion is connected to a second annular portion through a first transition portion. The second annular portion is connected to a first arc-shaped protrusion through a second transition portion. The first arc-shaped protrusion is connected to a third annular portion through a third transition portion. The third annular portion is connected to a fourth annular portion through a fourth transition portion.

[0007] Preferably, the lower outer diameter of the first transition portion is smaller than the upper outer diameter, the lower outer diameter of the second transition portion is smaller than the upper outer diameter, and its outer wall is arc-shaped, the third transition portion is axially symmetrical to the second transition portion, and the lower outer diameter of the fourth transition portion is smaller than the upper outer diameter.

[0008] Preferably, a first sealing ring is fixed inside the first arc-shaped protrusion.

[0009] Preferably, the second annular portion is provided with a second arc-shaped protrusion, and a second sealing ring is fixed inside the second arc-shaped protrusion.

[0010] Preferably, the first sealing ring and the second sealing ring are connected by an annular belt, and the first sealing ring, the second sealing ring and the annular belt are integrally formed.

[0011] Preferably, the first sealing ring has a first cavity, the second sealing ring has a second cavity, and the annular strip has a third cavity.

[0012] Preferably, the inner wall surfaces of the first sealing ring, the annular strip, and the second sealing ring are wavy.

[0013] Preferably, both the first connector and the second connector are provided as nuts.

[0014] Preferably, the first sealing ring, the second sealing ring, and the annular strip are made of silicone or EPDM rubber.

[0015] (III) Beneficial Effects

[0016] 1. This utility model, through the setting of the ring clamp joint, only requires inserting the hot water circulation pipe or cold water pipe into the ring clamp joint during installation, which is convenient and efficient. In addition, it also greatly improves the sealing performance of the connection.

[0017] 2. This utility model, through the setting of the U-shaped elbow, enables hot water to circulate, providing hot water in a timely manner without waiting for cold water discharge, thus saving energy and reducing water waste.

[0018] 3. This utility model, through the setting of a first arc-shaped protrusion and a first sealing ring, wherein the first sealing ring fills the entire first arc-shaped protrusion, not only increases the thickness of the first sealing ring but also increases its width, thereby improving the sealing performance. In addition, the arc-shaped protrusion of the first sealing ring can further improve the sealing performance and prevent leakage compared to a flat shape. Furthermore, by pre-installing and fixing the first sealing ring in the first arc-shaped protrusion, it is not necessary to install the first sealing ring first during on-site installation, which facilitates the installation of pipe fittings and improves installation efficiency.

[0019] 4. The present invention, through the arrangement of the first annular part, the first transition part, the second annular part, the second transition part, the first arc-shaped protrusion, the third transition part, the third annular part, the fourth transition part, and the fourth annular part, makes the ring clamp joint have a certain height difference, thereby further improving the sealing performance and the firmness of the fixing between the ring clamp joint and the hot water circulation pipe or the cold water pipe.

[0020] 5. This utility model achieves a double sealing effect by setting a second arc-shaped protrusion and a second sealing ring, in addition to a first arc-shaped protrusion and a first sealing ring, thereby greatly improving the sealing performance.

[0021] 6. This utility model uses an annular band to make the first and second sealing rings form a whole, which not only facilitates installation, but also provides a sealing effect, thereby further improving the sealing performance. The inner wall surfaces of the first sealing ring, the annular band, and the second sealing ring are made into a wavy shape. On the one hand, this greatly increases the friction between the first sealing ring, the annular band, and the second sealing ring and the hot water circulation pipe or cold water pipe. On the other hand, when the wavy inner wall surface is compressed, the gaps between the waves easily form a negative pressure, which firmly adheres to the outer wall surface of the hot water circulation pipe or cold water pipe, thereby greatly improving the fixation firmness and sealing performance.

[0022] 7. By providing the first cavity, the second cavity, and the third cavity, this utility model makes it easier for the first sealing ring, the annular band, and the second sealing ring to deform when squeezed by the hot water circulation pipe or the cold water pipe, facilitating the insertion of the hot water circulation pipe or the cold water pipe. On the other hand, it also plays a good role in resisting negative pressure and extending the service life of the first sealing ring, the second sealing ring, and the annular band. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall design of this utility model.

[0024] Figure 2 This is a schematic diagram of the ring clamp connector of this utility model.

[0025] Figure 3 This is a cross-sectional view of the ring clamp connector of this utility model.

[0026] Figure 4 This utility model Figure 3 A schematic diagram showing the addition of a second arc-shaped protrusion, a second sealing ring, and an annular band.

[0027] Figure 5 This is a schematic diagram of the first sealing ring, the annular belt, and the second sealing ring of this utility model.

[0028] Figure 6 This utility model Figure 5 A schematic diagram showing the addition of the first cavity, the second cavity, and the third cavity, as well as the wavy inner wall surfaces of the first sealing ring, the annular strip, and the second sealing ring.

[0029] In the diagram: 1-U-shaped elbow, 2-first short elbow, 3-first connector, 4-connecting piece, 5-second connector, 6-second short elbow, 7-ring connector, 8-first annular part, 9-first transition part, 10-second annular part, 11-second transition part, 12-first arc-shaped protrusion, 13-third transition part, 14-third annular part, 15-fourth transition part, 16-fourth annular part, 17-first sealing ring, 18-second arc-shaped protrusion, 19-second sealing ring, 20-annular band, 21-first cavity, 22-second cavity, 23-third cavity. Detailed Implementation

[0030] The following will refer to the appendix in the embodiments of this utility model. Figure 1-6 The technical solutions in the embodiments of this utility model are clearly and completely described. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0031] This utility model provides a technical solution: a double-sealed, ring-clamped, double-bend pipe fitting with return water, comprising a U-shaped elbow 1, a first short elbow 2 connected to the U-shaped elbow 1, a first connecting member 3 connected to the first short elbow 2, a second connecting member 5 fixed to the first connecting member 3 via a connecting piece 4, and a second short elbow 6 connected to the first connecting member 3. Ring-clamping connectors 7 are fixed to the upper end of the second short elbow 6 and both ends of the U-shaped elbow 2. In use, the two ring-clamping connectors 7 on the U-shaped elbow 1 are connected to a hot water circulation pipe, which is connected to a water heater. This creates a hot water circulation system, providing hot water promptly without waiting for cold water discharge, saving energy and reducing water waste. The second short elbow 6 is connected to a cold water pipe to provide cold water. The first connecting member 3 and the second connecting member 5 are used for connection and fixation to a faucet. The connecting piece 4 serves two purposes: supporting and fixing the first connecting member 3 and the second connecting member 5, and ensuring the spacing between the holes. This utility model, through the setting of the ring clamp joint 7, allows for easy and efficient installation by simply inserting the hot water circulation pipe or cold water pipe into the ring clamp joint 7 during installation. It also greatly improves the sealing performance of the connection.

[0032] The ring-shaped connector 7 includes a first annular portion 8 fixedly connected to the upper end of the second short elbow 6 or to both ends of the U-shaped elbow 2. The first annular portion 8 is connected to a second annular portion 10 via a first transition portion 9. The second annular portion 10 is connected to a first arc-shaped protrusion 12 via a second transition portion 11. The first arc-shaped protrusion 12 is connected to a third annular portion 14 via a third transition portion 13. The third annular portion 14 is connected to a fourth annular portion 16 via a fourth transition portion 15. A first sealing ring 17 is fixed inside the first arc-shaped protrusion 12, filling the entire first arc-shaped protrusion 12. This increases both the thickness and width of the first sealing ring 17, thereby improving sealing performance. Furthermore, the arc-shaped protrusion of the first sealing ring 17 further enhances sealing performance compared to a straight shape, preventing leakage. The inner edge of the first sealing ring 17 extends beyond the inner edge of the first arc-shaped protrusion 12. This compression effect, achieved during the insertion of the outer pipe fitting into the ring-clamp joint 7, compresses the first sealing ring 17, thus creating a seal. By pre-installing and fixing the first sealing ring 17 within the first arc-shaped protrusion 12, it is not necessary to install the first sealing ring 17 beforehand, simplifying pipe fitting installation and improving efficiency. The arrangement of the first annular portion 8, first transition portion 9, second annular portion 10, second transition portion 11, first arc-shaped protrusion 12, third transition portion 13, third annular portion 14, fourth transition portion 15, and fourth annular portion 16 creates a layered structure in the ring-clamp joint 7, further enhancing the sealing and secure fixing between the ring-clamp joint 7 and the hot water circulation pipe or cold water pipe.

[0033] The lower outer diameter of the first transition section 9 is smaller than its upper outer diameter, the lower outer diameter of the second transition section 11 is smaller than its upper outer diameter, and its outer wall is arc-shaped. The third transition section 13 is axially symmetrical to the second transition section 11, and the lower outer diameter of the fourth transition section 15 is smaller than its upper outer diameter. This arrangement ensures that, on the one hand, the upper end of the ring clamp 7 is larger than the lower end, facilitating the insertion of the hot water circulation pipe or cold water pipe; on the other hand, it creates a layered contact between the ring clamp 7 and the hot water circulation pipe or cold water pipe, thereby improving the sealing and secure fixing between the ring clamp 7 and the hot water circulation pipe or cold water pipe.

[0034] The second annular portion 10 is provided with a second arc-shaped protrusion 18, and a second sealing ring 19 is fixed inside the second arc-shaped protrusion 18. By setting the second arc-shaped protrusion 18 and the second sealing ring 19, together with the first arc-shaped protrusion 12 and the first sealing ring 17, a double sealing effect is achieved, thereby greatly improving the sealing performance.

[0035] The first sealing ring 17 and the second sealing ring 19 are connected by an annular belt 20, and the first sealing ring 17, the second sealing ring 19, and the annular belt 20 are integrally formed. The annular belt 20 makes the first sealing ring 17 and the second sealing ring 19 form a whole, which not only facilitates installation, but also provides a sealing effect, thereby further improving the sealing performance.

[0036] The first sealing ring 17 has a first cavity 21, the second sealing ring 19 has a second cavity 22, and the annular band 20 has a third cavity 23. The sizes of the first cavity 21, the second cavity 22, and the third cavity 23 are set according to actual needs. The cross-sections of the first cavity 21 and the second cavity 22 are circular, while the cross-section of the third cavity 23 is elongated. The arrangement of the first cavity 21, the second cavity 22, and the third cavity 23 makes it easier for the first sealing ring 17, the annular band 20, and the second sealing ring 19 to deform under pressure from hot water circulation pipes or cold water pipes, facilitating the insertion of these pipes. Furthermore, it provides good resistance to negative pressure, extending the service life of the first sealing ring 17, the second sealing ring 19, and the annular band 20.

[0037] The inner walls of the first sealing ring 17, the annular band 20, and the second sealing ring 19 are designed with a wavy shape. This design greatly increases the friction between the first sealing ring 17, the annular band 20, and the second sealing ring 19 and the hot water circulation pipe or cold water pipe. On the other hand, when the wavy inner walls are compressed, the gaps between the waves easily form a negative pressure, firmly adhering to the outer wall of the hot water circulation pipe or cold water pipe, thereby greatly improving the fixation firmness and sealing performance.

[0038] Both the first connector 3 and the second connector 5 are equipped with nuts. This design facilitates fixing them to the faucet.

[0039] The first sealing ring 17, the second sealing ring 19, and the annular belt 20 are made of silicone or EPDM rubber.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A ring-clamp double-seal type double-bend pipe fitting with return water, characterized in that, Includes a U-shaped elbow (1), the U-shaped elbow (1) is connected to a first short elbow (2), the first short elbow (2) is connected to a first connector (3), the first connector (3) is fixed to a second connector (5) by a connecting piece (4), the second connector (5) is connected to a second short elbow (6), and the upper end of the second short elbow (6) and both ends of the U-shaped elbow (1) are fixed with ring clamps (7).

2. The ring-clamp double-seal type double-bend pipe fitting with return water according to claim 1, characterized in that, The ring connector (7) includes a first annular portion (8) that is fixedly connected to the upper end of the second short elbow (6) or to the two ends of the U-shaped elbow (1). The first annular portion (8) is connected to a second annular portion (10) through a first transition portion (9). The second annular portion (10) is connected to a first arc-shaped protrusion (12) through a second transition portion (11). The first arc-shaped protrusion (12) is connected to a third annular portion (14) through a third transition portion (13). The third annular portion (14) is connected to a fourth annular portion (16) through a fourth transition portion (15).

3. The ring-clamp double-seal type double-bend pipe fitting with return water according to claim 2, characterized in that, The lower outer diameter of the first transition part (9) is smaller than the upper outer diameter, the lower outer diameter of the second transition part (11) is smaller than the upper outer diameter, and its outer wall is arc-shaped. The third transition part (13) is axially symmetrical with the second transition part (11), and the lower outer diameter of the fourth transition part (15) is smaller than the upper outer diameter.

4. The ring-clamp double-seal type double-bend pipe fitting with return water according to claim 2, characterized in that, A first sealing ring (17) is fixed inside the first arc-shaped protrusion (12).

5. A ring-clamp double-seal type double-bend pipe fitting with return water as described in claim 4, characterized in that, The second annular portion (10) is provided with a second arc-shaped protrusion (18), and a second sealing ring (19) is fixed inside the second arc-shaped protrusion (18).

6. A ring-clamp double-seal type double-bend pipe fitting with return water as described in claim 5, characterized in that, The first sealing ring (17) and the second sealing ring (19) are connected by an annular belt (20), and the first sealing ring (17), the second sealing ring (19) and the annular belt (20) are integrally formed.

7. A ring-clamp double-seal type double-bend pipe fitting with return water as described in claim 6, characterized in that, The first sealing ring (17) has a first cavity (21), the second sealing ring (19) has a second cavity (22), and the annular belt (20) has a third cavity (23).

8. A ring-clamp double-seal type double-bend pipe fitting with return water as described in claim 6, characterized in that, The inner wall surfaces of the first sealing ring (17), the annular strip (20), and the second sealing ring (19) are wavy.

9. A ring-clamp double-seal type double-bend pipe fitting with return water according to claim 1, characterized in that, Both the first connector (3) and the second connector (5) are provided with nuts.

10. A ring-clamp double-seal type double-bend pipe fitting with return water according to claim 7, characterized in that, The first sealing ring (17), the second sealing ring (19) and the annular belt (20) are made of silicone or EPDM rubber.

Images