Universal joint of PPR pipe fitting
By designing the universal joints of PPR pipe fittings with array annular steps and inclined surface structures, flexible connections of PPR pipe fittings of different specifications are achieved, the universality and construction problems of existing joints are solved, and the firmness and sealing of the connection are improved.
Patent Information
- Application Number
- CN202422386561.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-27
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-09-27
AI Technical Summary
The existing PPR pipe fitting joints lack flexibility and versatility, and require carrying multiple types of joints to adapt to different sizes of connections. The connection process requires high skills for construction personnel and is prone to leakage.
A universal joint for PPR pipe fittings is designed, using an array-set ring step connector, combining inclined surfaces and anti-slip marks, and flexible connections to different specifications of PPR pipe fittings are achieved through locking parts and sealing rings, enhancing the connection firmness and sealing properties without cutting and grinding operations.
It improves construction efficiency and connection flexibility, enhances the firmness and sealing of the connection, reduces the skill requirements for construction personnel, and avoids leakage at the connection.
Smart Images
Figure CN223076544U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of PPR pipe fittings joints, and particularly relates to a universal joint for PPR pipe fittings. Background Art
[0002] At present, there are a wide variety of PPR pipe fittings joints on the market, including straight-through joints, elbows, tees, reducing joints, etc. However, these joints are usually only applicable to specific connection scenarios and lack flexibility and versatility. During actual construction, due to the complex and changeable on-site conditions, construction workers often need to carry multiple types of joints to meet the connection between PPR pipe fittings of different sizes, which not only increases costs and burdens but also affects construction efficiency. In addition, the existing PPR pipe fittings joints often require precise cutting and grinding of pipes and the use of professional equipment such as hot melt machines for hot melt connection during connection. These operations require relatively high skills for construction workers, and once the connection is improper, it is easy to cause leakage at the connection, affecting the safety and stability of the entire pipeline system. In view of this, the present utility model is proposed. Content of the Utility Model
[0003] In order to solve the problem that the existing pipe fittings joints cannot adapt to PPR pipe fittings of different sizes, the present utility model provides a universal joint for PPR pipe fittings.
[0004] The present utility model provides a universal joint for PPR pipe fittings to solve the above technical problems. The universal joint for PPR pipe fittings includes a locking member and two connecting members. The connecting members are in a circular ring shape, and the connecting members are axially arranged with annular steps for the insertion of PPR pipe fittings. The diameter of the annular steps gradually increases from one end of the connecting member to the other end, making the connecting member as a whole in a conical shape. A connecting portion is provided at the largest diameter end of the annular steps. The locking member connects the two connecting members through the connecting portion;
[0005] The outer surface of the annular steps is an inclined surface, and the inclined direction is the same as the conical direction of the connecting member. Anti-slip lines are provided on the inclined surface.
[0006] In an embodiment of the present utility model, the outer surface of the connecting portion is provided with external threads, and each of the inner surfaces at both ends of the locking member is provided with a section of internal threads adapted to the external threads. The internal threads at both ends of the locking member are in opposite directions.
[0007] In an embodiment of the present utility model, sealant is provided at the internal threads of the locking member.
[0008] In an embodiment of the present utility model, the universal joint further includes a sealing ring adapted to the number of the annular steps. The surface of the annular step is provided with first through holes arranged in a circumferential array. The sealing ring fits on the inner surface of the annular step and is rotatably connected to the inner surface of the annular step. And the sealing ring is provided with second through holes aligned with the first through holes. Rotating the sealing ring can misalign the first through holes and the second through holes so that the sealing ring closes the first through holes.
[0009] In an embodiment of the present utility model, a limiting ring is provided on one side of the sealing ring, and a limiting groove is provided at a position of the annular step corresponding to the limiting ring. The limiting ring is located in the limiting groove and can rotate in the limiting groove.
[0010] In an embodiment of the present utility model, the surface of the limiting ring is provided with protruding limiting blocks. Two positioning grooves are arranged at intervals in the limiting groove. The size of the positioning groove is adapted to the size of the limiting block to position the limiting block when the limiting block slides into the positioning groove. Rotating the sealing ring can make the limiting blocks slide into the two positioning grooves respectively.
[0011] In an embodiment of the present utility model, when the limiting block slides into one of the positioning grooves, the first through hole and the second through hole are in corresponding positions. When the limiting block slides into the other positioning groove, the first through hole and the second through hole are misaligned and the sealing ring completely closes the first through hole.
[0012] In an embodiment of the present utility model, the universal joint further includes a pipe clamp. The pipe clamp is provided with a locking bolt. Rotating the locking bolt can adjust the diameter of the pipe clamp and make the pipe clamp be clamped at the ends of PPR pipe fittings of different specifications.
[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0014] By arranging a plurality of annular steps with different diameters in an array for PPR pipe fittings of different specifications to be inserted and connected with the connecting piece, the connection between the connecting piece and the PPR pipe fitting is realized. Since the number of the connecting pieces is two, the two connecting pieces can be respectively connected to two sections of PPR pipe fittings. By providing a connecting part at the largest diameter section of the connecting piece, the locking piece can fixedly connect the two connecting pieces through the connecting part, so that the universal joint can connect two PPR pipe fittings of different specifications, improving the use flexibility of the universal joint. At the same time, the outer surface of the annular step is set as an inclined surface, and anti-slip lines are arranged on the inclined surface, so as to increase the connection firmness and connection tightness between the connecting piece and the PPR pipe fitting. The universal joint can be firmly connected to the PPR pipe fitting without operations such as cutting and grinding the PPR pipe fitting, improving the operation efficiency of construction workers. Brief Description of the Drawings
[0015] The drawings are used to provide a further understanding of the embodiments of the present utility model and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present utility model, but do not constitute a limitation to the embodiments of the present utility model. In the drawings:
[0016] Figure 1 is a three-dimensional structural schematic diagram of a universal joint provided by an embodiment of the present utility model connected to two PPR pipe fittings;
[0017] Figure 2 is an exploded structural schematic diagram of a universal joint provided by an embodiment of the present utility model connected to two PPR pipe fittings;
[0018] Figure 3 is an exploded structural schematic diagram of a connecting member in a universal joint provided by an embodiment of the present utility model.
[0019] Description of the Reference Numerals
[0020] 1. Universal joint; 2. PPR pipe fitting; 11. Locking member; 12. Connecting member; 13. Sealing ring; 14. Pipe clamp; 121. Annular step; 122. Connecting portion; 131. Second through hole; 132. Limiting ring; 133. Limiting block; 141. Locking bolt; 1211. First through hole. Detailed Description of the Embodiments
[0021] The following provides a detailed description of the specific embodiments of the present utility model with reference to the drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present utility model and are not used to limit the present utility model.
[0022] Please refer to Figure 1 , Figure 1 is a three-dimensional structural schematic diagram of a universal joint provided by an embodiment of the present utility model connected to two PPR pipe fittings; Figure 2 is an exploded structural schematic diagram of a universal joint provided by an embodiment of the present utility model connected to two PPR pipe fittings; Figure 3It is an exploded structural schematic diagram of a connecting member in a universal joint provided by an embodiment of the present utility model. The universal joint 1 of the PPR pipe fitting 2 of the present utility model includes a locking member 11 and two connecting members 12. The connecting member 12 is in a circular ring shape, and the connecting member 12 is provided with annular steps 121 arranged in an axial direction for the PPR pipe fitting 2 to be inserted. The diameter of the annular step 121 gradually increases from one end of the connecting member 12 to the other end, making the connecting member 12 as a whole in a conical shape. A connecting portion 122 is provided at the largest diameter end of the annular step 121, and the locking member 11 connects the two connecting members 12 through the connecting portion 122; the outer surface of the annular step 121 is an inclined surface and the inclined direction is the same as the conical direction of the connecting member 12, and anti-slip lines are provided on the inclined surface.
[0023] By arranging the annular steps 121 in an array and making the diameter of the annular step 121 gradually increase from one end of the connecting member 12 to the other end, different specifications of PPR pipe fittings 2 can be inserted into the annular steps 121 with different diameters on the connecting member 12, so as to realize the connection between the connecting member 12 and the PPR pipe fitting 2. Since the number of connecting members 12 is two, the two connecting members 12 can be respectively connected to two sections of PPR pipe fittings 2. By providing the connecting portion 122 at the largest diameter section of the connecting member 12, the locking member 11 fixes and connects the two connecting members 12 through the connecting portion 122, so as to realize the connection of two sections of PPR pipe fittings 2.
[0024] When connecting two sections of PPR pipe fittings 2, since the diameters of the annular steps 121 at different positions on the connecting member 12 are different, the two connecting members 12 can be respectively inserted and connected to two sections of PPR pipe fittings 2 with different diameters, and the connecting portions 122 on the two connecting members 12 are fixedly connected through the locking member 11, so that the universal joint 1 can connect two sections of PPR pipe fittings 2 with different specifications, improving the use flexibility of the universal joint 1.
[0025] Since the outer surface of the annular step 121 is an inclined surface, when inserting the connecting member 12 into the PPR pipe fitting 2, the inclined surface can be in contact with the inner wall of the PPR pipe fitting 2, and as the insertion depth increases, the inclined surface can extrude the inner wall of the PPR pipe fitting 2, thereby increasing the connection firmness between the connecting member 12 and the PPR pipe fitting 2. At the same time, with the anti-slip line design on the inclined surface, the connection firmness and connection tightness between the connecting member 12 and the PPR pipe fitting 2 can be further increased. Without cutting, grinding and other operations on the PPR pipe fitting 2, the universal joint 1 can be firmly connected to the PPR pipe fitting 2, improving the operation efficiency of construction workers.
[0026] In an embodiment of the present utility model, an external thread is provided on the outer surface of the connecting portion 122. Inner threads adapted to the external thread are provided on the inner surfaces at both ends of the locking member 11, and the inner thread directions at both ends of the locking member 11 are opposite. Thus, when using the locking member 11 to lock two connecting portions 122, by sleeving both ends of the locking member 11 on one connecting portion 122 respectively, and then rotating the locking member 11, the locking member 11 can be threadedly connected to the two connecting portions 122 simultaneously. Since the inner thread directions at both ends of the locking member 11 are opposite, the two connecting portions 122 can be tightened simultaneously when rotating the locking member 11, so as to realize the connection of two sections of PPR pipe fittings 2 under the action of the universal joint 1.
[0027] In an embodiment of the present utility model, sealing glue is provided at the inner thread of the locking member 11, so as to increase the sealing performance between the connecting member 12 and the locking member 11 under the action of the sealing glue after the locking member 11 is connected to the connecting portion 122, and prevent leakage at the connection between the locking member 11 and the connecting member 12.
[0028] In an embodiment of the present utility model, the universal joint 1 further includes a sealing ring 13 that is adapted to the number of annular steps 121. First through holes 1211 are arranged in an array along the circumferential direction on the surface of the annular step 121. The sealing ring 13 is attached to the inner surface of the annular step 121 and rotatably connected to the inner surface of the annular step 121, and a second through hole 131 that is aligned with the first through hole 1211 is provided on the sealing ring 13. Rotating the sealing ring 13 can make the first through hole 1211 and the second through hole 131 misaligned so that the sealing ring 13 closes the first through hole 1211.
[0029] By providing a plurality of first through holes 1211 on the surface of the annular step 121 and rotatably connecting the sealing ring 13 provided with a plurality of second through holes 131 to the inner surface of the annular step 121, before connecting the connecting member 12 to the PPR pipe fitting 2, by comparing the diameter of the PPR pipe fitting 2 and the diameter of the annular step 121, and rotating and adjusting the sealing ring 13 at the place smaller than the diameter of the PPR pipe fitting 2 to make the first through hole 1211 and the second through hole 131 in position, and rotating and adjusting the sealing ring 13 at the place larger than the diameter of the PPR pipe fitting 2 to make the first through hole 1211 and the second through hole 131 misaligned, and making the sealing ring 13 close the first through hole 1211. Thus, when in subsequent use, the gas or liquid medium in the PPR pipe fitting 2 can pass through the smallest diameter of the annular step 121, and at the same time, the medium can also pass through the first through hole 1211 and the second through hole 131 in position, so as to increase the flow rate of the medium passing through the connecting member 12, avoid blockage due to too small flow rate when the medium reaches the connecting member 12, and further avoid the situation that the pressure between the connecting member 12 and the PPR pipe fitting 2 increases and the connecting member 12 falls off.
[0030] In an embodiment of the present utility model, a limiting ring 132 is provided on one side of the sealing ring 13. A limiting groove is provided at the position of the annular step 121 corresponding to the limiting ring 132. The limiting ring 132 is located in the limiting groove and can rotate in the limiting groove, so that the sealing ring 13 can always remain in contact with the inner wall of the annular step 121, thereby increasing the sealing performance of the sealing ring 13 for the first through hole 1211 and preventing leakage at the first through hole 1211.
[0031] In an embodiment of the present utility model, protruding limiting blocks 133 are provided on the surface of the limiting ring 132. Two positioning grooves are provided at intervals in the limiting groove. The size of the positioning groove is adapted to the size of the limiting block 133 to position the limiting block 133 when the limiting block 133 slides into the positioning groove. Rotating the sealing ring 13 can make the limiting block 133 slide into the two positioning grooves respectively.
[0032] In the above embodiment, when the limiting block 133 slides into one of the positioning grooves, the first through hole 1211 corresponds to the position of the second through hole 131, so as to facilitate the medium to pass through the first through hole 1211 and the second through hole 131. When the limiting block 133 slides into the other positioning groove, the first through hole 1211 is misaligned with the second through hole 131 and the sealing ring 13 completely closes the first through hole 1211 to prevent the medium from leaking at the first through hole 1211.
[0033] In an embodiment of the present utility model, the universal joint 1 further includes a pipe clamp 14. A locking bolt 141 is provided on the pipe clamp 14. Rotating the locking bolt 141 can adjust the diameter of the pipe clamp 14 and make the pipe clamp 14 clamped at the end of different specifications of PPR pipe fittings 2, so as to increase the connection firmness between the connecting member 12 and the PPR pipe fittings 2 and prevent the connecting member 12 from falling off the PPR pipe fittings 2.
[0034] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower horizontal height than the second feature.
[0035] The preferred embodiments of the present utility model have been described in detail above in conjunction with the accompanying drawings. However, the present utility model is not limited thereto. Within the scope of the technical concept of the present utility model, various simple modifications can be made to the technical solution of the present utility model, including combinations of various specific technical features in any suitable manner. To avoid unnecessary repetition, the present utility model will not separately describe various possible combination methods. However, these simple modifications and combinations should equally be regarded as the content disclosed by the present utility model and all fall within the protection scope of the present utility model.
[0036] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present utility model.
Claims
1. A universal joint for PPR pipe fittings, characterized in that, The universal joint includes a locking member and two connecting members. The connecting members are annular, and the connecting members are provided with annular steps arranged in an axial direction for inserting PPR pipe fittings. The diameter of the annular steps gradually increases from one end of the connecting member to the other end, making the overall shape of the connecting member conical. A connecting portion is provided at the largest diameter end of the annular steps. The locking member connects the two connecting members through the connecting portion. The outer surface of the annular step is an inclined surface, and the inclined direction is the same as the conical direction of the connecting member. Anti-slip threads are provided on the inclined surface.
2. The universal joint of the PPR pipe fitting according to claim 1, characterized in that, External threads are provided on the outer surface of the connecting portion. One section of internal threads adapted to the external threads is provided on the inner surface of each end of the locking member, and the directions of the internal threads at both ends of the locking member are opposite.
3. The universal joint of the PPR pipe fitting according to claim 2, characterized in that, Sealing glue is provided at the internal thread of the locking member.
4. The universal joint of the PPR pipe fitting according to claim 1, characterized in that, The universal joint further includes sealing rings adapted to the number of the annular steps. First through holes are arranged in a circumferential direction on the surface of the annular steps. The sealing rings are attached to the inner surface of the annular steps and rotatably connected to the inner surface of the annular steps. Second through holes aligned with the first through holes are provided on the sealing rings. Rotating the sealing rings can misalign the first through holes and the second through holes so that the sealing rings close the first through holes.
5. The universal joint of the PPR pipe fitting according to claim 4, characterized in that, A limiting ring is provided on one side of the sealing ring. A limiting groove is provided at the position of the annular step corresponding to the limiting ring. The limiting ring is located in the limiting groove and can rotate in the limiting groove.
6. The universal joint of the PPR pipe fitting according to claim 5, characterized in that, Protruding limiting blocks are provided on the surface of the limiting ring. Two positioning grooves are arranged at intervals in the limiting groove. The size of the positioning grooves is adapted to the size of the limiting blocks to position the limiting blocks when the limiting blocks slide into the positioning grooves. Rotating the sealing rings can make the limiting blocks slide into the two positioning grooves respectively.
7. The universal joint of the PPR pipe fitting according to claim 6, characterized in that, When the limiting block slides into one of the positioning grooves, the positions of the first through hole and the second through hole correspond. When the limiting block slides into the other positioning groove, the first through hole and the second through hole are misaligned and the sealing ring completely closes the first through hole.
8. The universal joint of the PPR pipe fitting according to claim 1, characterized in that, The universal joint further includes a pipe clamp. A locking bolt is provided on the pipe clamp. Rotating the locking bolt can adjust the diameter of the pipe clamp and make the pipe clamp clamp the ends of PPR pipe fittings of different specifications.