Connecting device for PPR pipe fittings
By designing a PPR pipe fitting connection device including hoses, movable joints and fixed joints, using threaded connections and hot melt technology, the problem that the hot melt cannot connect PPR pipe fittings in corners of walls or narrow spaces is solved, achieving a flexible and beautiful connection effect.
Patent Information
- Application Number
- CN202422369381.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-26
- Publication Date
- 2025-08-12
- Estimated Expiration
- 2034-09-26
AI Technical Summary
Existing hot melters cannot hot melt connections to PPR pipe fittings in corners of walls or in narrow spaces, resulting in difficulty in connecting.
A connection device for PPR pipe fittings is designed, including hoses, movable joints and fixed joints. The PPR pipe fittings are connected to the corners of the wall or in narrow spaces through threaded connections. The various specifications of the movable joints are used to adapt to PPR pipe fittings of different diameters, and are hot-melted to the PPR pipe fittings after heating.
Reliable connection of PPR pipe fittings in corners of walls or narrow spaces is achieved, the flexibility and aesthetics of the connection device are improved, and the problem of the inability to connect the hot melt is avoided.
Smart Images
Figure CN223215952U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pipe joints, in particular to a connecting device for PPR pipe fittings. Background Art
[0002] PPR (polypropylene random copolymer) pipe fittings are widely used in the fields of building water supply, HVAC and industrial pipelines due to their excellent corrosion resistance, high temperature resistance and good mechanical properties. The connection methods of PPR pipe fittings mainly include hot melt connection, threaded connection and flange connection, among which hot melt connection is widely used due to its firm connection and good sealing. When hot melt connection is adopted, the heat of the hot melter is controlled and the two pipe fittings are respectively plugged into the outer cylindrical joint and inner hole joint of the hot melter. After the outer cylindrical joint and the inner hole joint are heated, the outer circle and inner hole of the two pipe fittings can be hot-melted. Subsequently, the two pipe fittings are taken out of the hot melter and the hot-melted parts are plugged into each other to achieve the connection of the two pipe fittings. However, when one of the pipe fittings is located in a corner or a narrow space, the outer cylindrical joint or the inner hole joint on the hot melter cannot be plugged into the pipe fitting, which makes it impossible to use the hot melter to hot-melt the pipe fitting. In view of this, the present utility model is proposed. Utility Model Content
[0003] In order to solve the problem that a hot melter cannot perform hot melting on pipe fittings at wall corners, the utility model provides a connecting device for PPR pipe fittings.
[0004] In order to solve the above technical problems, the utility model provides a connection device for PPR pipe fittings, which is used for connecting to PPR pipe fittings. The connection device includes a hose, a movable joint and a fixed joint. Two fixed joints are provided, and the two fixed joints are respectively fixed at both ends of the hose, and a first external thread is provided on the fixed joint. The two ends of the movable joint are respectively provided with a first internal thread and a second internal thread, the first internal thread is threadedly connected to the first external thread, and the second internal thread is threadedly connected to the PPR pipe fitting. There are at least two specifications of the movable joint, and the first internal thread on each specification of the movable joint has the same size, and the second internal thread on each specification of the movable joint has different sizes.
[0005] In an embodiment of the present invention, the connecting device also includes a hard pipe, the inner side of which is provided with a third internal thread, the third internal thread is threadedly connected to the first external thread, and the inner diameter of the hard pipe is adapted to the outer diameter of the PPR pipe fitting.
[0006] In an embodiment of the present invention, there are two movable joints, and the two movable joints are respectively threadedly connected to the first external threads on the fixed joints at both ends of the hose.
[0007] In an embodiment of the present invention, an external hexagon is provided at one end of the movable joint close to the second internal thread, and a circumscribed circle of the external hexagon is equal to an outer diameter of the movable joint.
[0008] In an embodiment of the present invention, the connecting device further comprises a decorative tube, and the inner diameter of the decorative tube is adapted to the outer diameter of the fixed joint.
[0009] In an embodiment of the present invention, the movable joint is provided with a second external thread, the outer diameter of the second external thread is equal to the outer diameter of the movable joint, and the decorative tube is provided with a fourth internal thread threadably connected to the second external thread.
[0010] In an embodiment of the present invention, the fourth internal thread is provided at both ends of the decorative tube.
[0011] In an embodiment of the present invention, a surface where the movable joint is connected to the PPR pipe fitting is provided with sealant, and a surface where the movable joint is connected to the fixed joint is provided with sealant.
[0012] In an embodiment of the present invention, the hose comprises any one of a corrugated hose, a metal hose, and a plastic hose.
[0013] Compared with the prior art, the beneficial effects of the present invention are:
[0014] By setting fixed joints at both ends of the hose and threading the movable joint to the fixed joint, when connecting PPR pipe fittings in corners or narrow spaces, the movable joint can be heated first and the heated movable joint can be hot-melt connected to the PPR pipe fitting. Then the fixed joint can be threaded to connect the hose to the PPR pipe fitting. Finally, the PPR pipe fitting to be connected can be connected to the fixed joint at the other end of the hose. This can achieve the connection between the two sections of PPR pipe fittings, avoiding the situation where the hot melter cannot hot-melt the PPR pipe fittings at the corner and the two sections of PPR pipe fittings cannot be connected. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present invention, but do not constitute a limitation of the embodiments of the present invention. In the accompanying drawings:
[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of the connecting device provided by the embodiment of the utility model installed on the PPR pipe fitting;
[0017] Figure 2 This is a schematic diagram of the process of installing the connecting device provided by an embodiment of the utility model on a PPR pipe fitting;
[0018] Figure 3 This is a schematic diagram of an exploded structure in which the connecting device provided by an embodiment of the present utility model is installed on a PPR pipe fitting;
[0019] Figure 4 yes Figure 3 A magnified view of point A in the figure;
[0020] Figure 5 This is a schematic diagram of the exploded structure of a connecting device provided by another embodiment of the present invention installed on a PPR pipe fitting.
[0021] Description of Reference Numerals
[0022] 1. Connecting device; 2. PPR pipe fitting; 11. Hose; 12. Flexible joint; 13. Fixed joint; 14. Rigid pipe; 15. Decorative pipe; 121. First internal thread; 122. Second internal thread; 123. External hexagon; 124. Second external thread; 131. First external thread; 141. Third internal thread; 151. Fourth internal thread. DETAILED DESCRIPTION
[0023] The following is a detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention.
[0024] See also Figures 1-4 The connecting device 1 of the PPR pipe fitting of the present invention is used to be connected to the PPR pipe fitting 2. The connecting device 1 includes a hose 11, a movable joint 12 and a fixed joint 13. There are two fixed joints 13, which are respectively fixed at both ends of the hose 11, and a first external thread 131 is provided on the fixed joint 13. The two ends of the movable joint 12 are respectively provided with a first internal thread 121 and a second internal thread 122. The first internal thread 121 is threadedly connected to the first external thread 131, and the second internal thread 122 is threadedly connected to the PPR pipe fitting 2. There are at least two specifications of the movable joint 12. The first internal thread 121 on each specification of the movable joint 12 has the same size, and the second internal thread 122 on each specification of the movable joint 12 has different sizes.
[0025] By arranging fixed joints 13 at both ends of the hose 11 and threading the movable joint 12 with the fixed joint 13, when connecting the PPR pipe fittings 2 in corners or narrow spaces, the movable joint 12 can be first connected to the PPR pipe fitting 2, and then the fixed joint 13 can be threadedly connected to the movable joint 12 to connect the hose 11 to the PPR pipe fitting 2, and then the PPR pipe fitting 2 to be connected is connected to the fixed joint 13 at the other end of the hose 11, so that the two sections of PPR pipe fittings 2 can be connected, so as to avoid the situation where the hot melter cannot hot-melt the PPR pipe fitting 2 at the corner, resulting in the inability to connect the two sections of PPR pipe fittings 2.
[0026] In the above embodiment, since the first internal thread 121 and the second internal thread 122 are provided on the movable joint 12, and the first external thread 131 is provided on the fixed joint 13, when connecting the PPR pipe fitting 2 at the corner, the movable joint 12 can be heated first, and then the heated movable joint 12 is screwed onto the PPR pipe fitting 2, and an external thread that is compatible with the second internal thread 122 is hot-melted on the PPR pipe fitting 2, and the movable joint 12 is threadedly connected to the PPR pipe fitting 2. Then, the first internal thread 121 on the fixed joint 13 is threadedly connected to the first external thread 131 on the movable joint 12, so that the connecting device 1 is connected to the PPR pipe fitting 2 at the corner. Among them, the movable joint 12 is a metal movable joint. When heating the movable joint 12, the movable joint 12 can be first removed from the fixed joint 13, and the movable joint 12 can be heated using an oxygen welding gun, so that the heated movable joint 12 can be hot-melt connected to the PPR pipe fitting 2, and an external thread that is compatible with the second internal thread 122 can be formed on the PPR pipe fitting 2.
[0027] Since there are multiple specifications of the movable joint 12, the movable joints 12 of various specifications can be connected to the fixed joint 13 to adapt to PPR pipe fittings 2 of different diameters. It can connect two sections of PPR pipe fittings 2 with the same diameter, and can also connect two ends of PPR pipe fittings 2 with different diameters, thereby improving the flexibility of use of the connecting device 1.
[0028] like Figure 5As shown, in an embodiment of the present utility model, the connecting device 1 also includes a hard tube 14, and the inner side of the hard tube 14 is provided with a third internal thread 141, the third internal thread 141 is threadedly connected to the first external thread 131, and the inner diameter of the hard tube 14 is adapted to the outer diameter of the PPR pipe fitting 2, so that after one end of the connecting device 1 is connected to the PPR pipe fitting 2 at the corner of the wall, the position of the fixed joint 13 at the other end of the hose 11 is adjusted under the action of the hose 11, and the third internal thread 141 on the hard tube 14 is threadedly connected to the first external thread 131 on the fixed joint 13 to connect the hard tube 14 to the fixed joint 13, and then a hot melter is used to heat-melt the hard tube 14, and at the same time, the PPR pipe fitting 2 to be connected is heat-melted, and finally the hot-melted hard tube 14 is connected to the PPR pipe fitting 2 to realize the connection of the two sections of PPR pipe fittings 2 under the action of the connecting device 1.
[0029] like Figure 3 and Figure 4 As shown, in an embodiment of the present invention, there are two movable joints 12, and the two movable joints 12 are respectively threadedly connected to the first external threads 131 on the fixed joints 13 at both ends of the hose 11. When the two sections of PPR pipe fittings 2 to be connected are both located at the corners and the PPR pipe fittings 2 cannot be hot-melted using a hot melter, the same method can be used to heat the two movable joints 12, and the two heated movable joints 12 are respectively connected to the two sections of PPR pipe fittings 2. Finally, the fixed joints 13 at both ends of the hose 11 are respectively threadedly connected to the two movable joints 12, thereby realizing the function of connecting the two sections of PPR pipe fittings 2 located at the corners.
[0030] In an embodiment of the present utility model, an external hexagon 123 is provided at one end of the movable joint 12 close to the second internal thread 122, and the circumscribed circle of the external hexagon 123 is equal to the outer diameter of the movable joint 12, so that after the movable joint 12 is heated, the external hexagon 123 can be clamped with a hexagonal wrench, and the movable joint 12 can be screwed into the PPR pipe fitting 2, so as to avoid the movable joint 12 being too hot after heating and being unable to be screwed onto the PPR pipe fitting 2. Since the circumscribed circle of the external hexagon 123 is equal to the outer diameter of the movable joint 12, it is convenient for the user to use a hexagonal wrench to clamp the external hexagon 123 part of the movable joint 12 to prevent the movable joint 12 from detaching from the hexagonal wrench.
[0031] In an embodiment of the present invention, the connection device 1 further includes a decorative tube 15, the inner diameter of which matches the outer diameter of the fixed joint 13. Thus, when connecting two sections of PPR pipe fittings 2, the decorative tube 15 can be first sleeved onto one section of the PPR pipe fitting 2, and then the two movable joints 12 can be fixed to the two sections of the PPR pipe fittings 2, respectively. The fixed joints 13 at both ends of the hose 11 are threadedly connected to the two movable joints 12. Finally, the decorative tube 15 can be moved and sleeved onto the outside of the hose 11 to prevent the hose 11 from bending and affecting the overall aesthetics of the connection device 1. The ends of the decorative tube 15 are transitionally fitted with the two movable joints 12 to prevent the decorative tube 15 from being displaced and causing the hose 11 to be exposed.
[0032] In other embodiments of the present invention, a second external thread 124 is provided on the movable joint 12, and the outer diameter of the second external thread 124 is equal to the outer diameter of the movable joint 12. The decorative tube 15 is provided with a fourth internal thread 151 threadedly connected to the second external thread 124, so that the decorative tube 15 can be threadedly connected to the second external thread 124 on the movable joint 12 through the fourth internal thread 151, thereby improving the connection stability of the decorative tube 15.
[0033] In an embodiment of the present invention, a fourth internal thread 151 is provided at both ends of the decorative tube 15 so that the two ends of the decorative tube 15 are threadedly connected to the second external threads 124 on the two movable joints 12 through the fourth internal thread 151, further improving the connection stability of the decorative tube 15.
[0034] In an embodiment of the present utility model, the surface where the movable joint 12 is connected to the PPR pipe fitting 2 is provided with sealant, and the surface where the movable joint 12 is connected to the fixed joint 13 is provided with sealant, so as to strengthen the connection sealing between the movable joint 12, the fixed joint 13 and the PPR pipe fitting 2 under the action of the sealant, and prevent leakage after the connecting device 1 is connected to the two sections of PPR pipe fittings 2.
[0035] In an embodiment of the present utility model, the hose 11 includes any one of a corrugated tube, a metal hose, and a plastic hose, so that after one end of the hose 11 is connected to one section of the PPR pipe fitting 2, the other end of the hose 11 can move freely, making it convenient for the user to connect the hose 11 to the other end of the PPR pipe fitting 2.
[0036] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.
[0037] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention may be subjected to various simple modifications, including combining the specific technical features in any suitable manner. To avoid unnecessary repetition, the present invention will not further describe various possible combinations. However, these simple modifications and combinations should also be considered as disclosed in the present invention and fall within the scope of protection of the present invention.
[0038] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.
Claims
1. A PPR pipe connection device, used for connecting to a PPR pipe, characterized in that: The connecting device includes a hose, a movable joint and a fixed joint. There are two fixed joints, which are respectively fixed at both ends of the hose, and a first external thread is provided on the fixed joint. The two ends of the movable joint are respectively provided with a first internal thread and a second internal thread. The first internal thread is threadedly connected to the first external thread, and the second internal thread is threadedly connected to the PPR pipe fitting. There are at least two specifications of the movable joint. The first internal thread on each specification of the movable joint has the same size, and the second internal thread on each specification of the movable joint has different sizes.
2. The connecting device of PPR pipe fittings according to claim 1, characterized in that: The connecting device also includes a hard pipe, the inner side of which is provided with a third internal thread, the third internal thread being threadedly connected to the first external thread, and the inner diameter of the hard pipe is adapted to the outer diameter of the PPR pipe fitting.
3. The connecting device of PPR pipe fittings according to claim 1, characterized in that: There are two movable joints, and the two movable joints are respectively threadedly connected to the first external threads on the fixed joints at both ends of the hose.
4. The connecting device of PPR pipe fittings according to claim 3, characterized in that: An external hexagon is provided on one end of the movable joint close to the second internal thread, and the circumscribed circle of the external hexagon is equal to the outer diameter of the movable joint.
5. The connecting device of PPR pipe fittings according to claim 1, characterized in that: The connecting device further comprises a decorative tube, the inner diameter of which is adapted to the outer diameter of the fixing joint.
6. The connecting device of PPR pipe fittings according to claim 5, characterized in that: The movable joint is provided with a second external thread, the outer diameter of the second external thread is equal to the outer diameter of the movable joint, and the decorative tube is provided with a fourth internal thread threadably connected to the second external thread.
7. The connecting device of PPR pipe fittings according to claim 6, characterized in that: The fourth internal thread is provided at both ends of the decorative tube.
8. The connecting device of PPR pipe fittings according to claim 1, characterized in that: The surface where the movable joint is connected to the PPR pipe fitting is provided with sealant, and the surface where the movable joint is connected to the fixed joint is provided with sealant.
9. The connecting device of PPR pipe fittings according to claim 1, characterized in that: The hose includes any one of a corrugated hose, a metal hose, and a plastic hose.