Reducing self-adaptive PPR pipe joint

Abstract

The utility model discloses a reducing self-adaptive PPR pipe joint, relates to the field of pipe joints, and aims to solve the problem that in the prior art, the angles of the two ends of a joint cannot be adjusted, so that pipelines with included angles are difficult to flexibly connect during installation. The two ends of the corrugated pipe are fixedly connected with a first L-shaped section annular connecting piece and a second L-shaped section annular connecting piece correspondingly, and first connecting rods are fixedly connected to the positions, at the upper end and the lower end of the corrugated pipe, of the end face of the inner side of the first L-shaped section annular connecting piece correspondingly. The first L-shaped section annular connecting piece and the second L-shaped section annular connecting piece which can rotate are arranged, the flexible characteristic of the corrugated pipe is matched, free adjustment of the angles of the two ends of the pipe joint is achieved, and the pipe joint is convenient to use. And the connecting requirements of pipelines at different angles can be flexibly met, and the construction convenience is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of pipe fittings, specifically a variable diameter adaptive PPR pipe fitting. Background Technology

[0002] PPR pipe (random copolymer polypropylene pipe) is a type of plastic pipe widely used in building water supply, drainage, and HVAC systems. It is made of random copolymer polypropylene. PPR pipes use a heat fusion connection method, offering good sealing and easy installation without the need for threads or adhesives. Furthermore, it boasts advantages such as being environmentally friendly and non-toxic, lightweight, and having a long lifespan, making it an ideal replacement for traditional metal pipes. Commonly used in domestic hot and cold water pipes, underfloor heating systems, and industrial fluid transportation, it comes in various specifications, offers high cost-effectiveness, and is one of the essential basic materials in modern buildings. Two PPR pipes require a connector for connection.

[0003] For example, according to authorization announcement number CN211010200U, a novel PPR pipe fitting includes a connecting joint and a pipe. The connecting joint has pipes symmetrically fixed at both ends. The connecting joint includes a welded pipe, an external threaded ring, a connecting pipe, a first connecting ring, an internal threaded sleeve, a second connecting ring, and a deep grooved collar. A welded pipe is fixedly fitted onto one end of the pipe, and an external threaded ring is fixed to one end of the welded pipe. A connecting pipe is provided at one end of the pipe, and a first connecting ring is fixed to the end of the connecting pipe near the external threaded ring. An internal threaded sleeve is fitted onto the outside of the connecting pipe, and the internal threaded sleeve is threadedly connected to the external threaded ring. A second connecting ring is fixed to the end of the connecting pipe away from the first connecting ring. Deep grooved collars are fitted onto the outside of the two second connecting rings on the connecting pipe, and the deep grooved collars are slidably connected to the connecting pipe. This novel PPR pipe fitting can connect pipes, is easy to operate, has a good sealing effect, and is convenient for people to use.

[0004] However, the pipe fittings in the above technologies use a fixed structure and the angles at both ends of the fitting cannot be adjusted, making it difficult to flexibly connect pipes with included angles during installation and affecting the convenience of construction; therefore, the market urgently needs to develop a variable diameter adaptive PPR pipe fitting to help people solve the existing problems. Utility Model Content

[0005] The purpose of this utility model is to provide a variable diameter adaptive PPR pipe joint to solve the problem mentioned in the background art that the pipe joint adopts a fixed structure and the angles at both ends of the joint cannot be adjusted, which makes it difficult to flexibly connect pipes with included angles during installation and affects the convenience of construction.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a variable diameter adaptive PPR pipe joint, comprising a corrugated pipe, wherein a first L-shaped cross-section annular connector and a second L-shaped cross-section annular connector are fixedly connected to both ends of the corrugated pipe, and a tightening ring is fixedly connected to the outer wall of both the first L-shaped cross-section annular connector and the side away from the corrugated pipe, and a rotating pipe is rotatably connected to the outer side of each tightening ring, and an L-shaped cross-section connecting pipe is connected to the outer side of each of the two rotating pipes, wherein a first connecting rod is fixedly connected to the inner end face of the first L-shaped cross-section annular connector and to both the upper and lower ends of the corrugated pipe, and a second connecting rod is fixedly connected to the inner end face of the second L-shaped cross-section annular connector and to both the upper and lower ends of the corrugated pipe.

[0007] Preferably, the two second connecting rods are inserted between the two first connecting rods and are rotatably connected to the two first connecting rods respectively via a rotating shaft.

[0008] Preferably, the outer wall of the rotating tube is fixedly connected with a plurality of rectangular paddles in an annular array, and the inner wall of the rotating tube is fixedly connected with an internal thread portion.

[0009] Preferably, the outer wall of the L-shaped cross-section connecting pipe is fixedly connected with an external thread.

[0010] Preferably, the L-shaped cross-section connecting pipe is inserted into the rotating pipe and the external threaded part is threadedly connected to the internal threaded part.

[0011] Preferably, the inner wall of the L-shaped cross-section connecting pipe is provided with a plurality of interlocking teeth.

[0012] Preferably, after one end of the two L-shaped cross-section connecting pipes is inserted into the two rotating pipes, a sealing ring is provided between the pipe and the outer end face of the first L-shaped cross-section annular connector and the second L-shaped cross-section annular connector, respectively.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] (1) In this utility model, by setting a rotatable first L-shaped cross-section annular connector and a second L-shaped cross-section annular connector, combined with the flexible characteristics of the corrugated pipe, the angles at both ends of the pipe joint can be freely adjusted, which can flexibly adapt to the pipe connection requirements of different angles and greatly improve the convenience of construction.

[0015] (2) In this utility model, the interlocking tooth structure inside the L-shaped cross section connecting pipe forms a mechanical interlock with the PPR pipe after hot melting, and with the threaded fastening structure, it not only ensures the firmness of the connection, but also achieves excellent sealing effect, effectively preventing leakage at the pipe connection.

[0016] (3) In this utility model, the installation process is made simpler by the threaded connection structure of the rotating tube and the L-shaped cross-section connecting tube. Only rotation is needed to complete the fastening. At the same time, the sealing ring further enhances the sealing performance of the connection part, making the overall structure more reliable and durable. Attached Figure Description

[0017] Figure 1 This is a front view of a variable diameter adaptive PPR pipe fitting according to this utility model.

[0018] Figure 2 This is a front sectional view of the present invention;

[0019] Figure 3 This is a side sectional view of the rotating shaft of this utility model;

[0020] Figure 4 This is a detailed enlarged view of part A of this utility model.

[0021] In the diagram: 1. Bellows; 2. First L-shaped cross-section annular connector; 201. Second L-shaped cross-section annular connector; 202. First connecting rod; 203. Second connecting rod; 204. Rotating shaft; 205. Tightening ring; 3. Rotating tube; 301. Rectangular paddle; 302. Internal threaded part; 4. L-shaped cross-section connecting tube; 401. External threaded part; 402. Engaging teeth; 5. Sealing ring. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Please see Figures 1-4 This utility model provides an embodiment of a variable diameter adaptive PPR pipe joint, including a corrugated pipe 1. A first L-shaped cross-section annular connector 2 and a second L-shaped cross-section annular connector 201 are fixedly connected to both ends of the corrugated pipe 1. A tightening ring 205 is fixedly connected to the outer wall of the first L-shaped cross-section annular connector 2 and the second L-shaped cross-section annular connector 201 on the side away from the corrugated pipe 1. A rotating pipe 3 is rotatably connected to the outer side of the tightening ring 205. An L-shaped cross-section connecting pipe 4 is connected to the outer side of the two rotating pipes 3. A plurality of interlocking teeth 402 are arranged in an array on the inner wall of the L-shaped cross-section connecting pipe 4. By heat-melting the two PPR pipe connection ends that need to be connected, the heat-melted PPR pipe connection ends are inserted into the L-shaped cross-section connecting pipe 4. The molten material on the outer wall of the PPR pipe connection ends is embedded between the multiple interlocking teeth 402 and forms a sealed and fixed structure after cooling.

[0024] Please see Figure 2 and Figure 4Multiple rectangular paddles 301 are fixedly connected to the outer wall of the rotating tube 3 in a ring array. An internal threaded portion 302 is fixedly connected to the inner wall of the rotating tube 3. An external threaded portion 401 is fixedly connected to the outer wall of the L-shaped cross-section connecting tube 4. The L-shaped cross-section connecting tube 4 is inserted into the rotating tube 3, and the external threaded portion 401 is threadedly connected to the internal threaded portion 302. After two PPR tubes are fixed to two L-shaped cross-section connecting tubes 4 respectively, the two L-shaped cross-section connecting tubes 4 are inserted into the rotating tube 3, and the rotating tube 3 is rotated. The two tubes rotating the rotating tube 3 are connected by the external threaded portion 401 and the internal threaded portion 302. Pull the two L-shaped cross-section connecting tubes 4 into the two rotating tubes 3 and abut against the outer end faces of the first L-shaped cross-section annular connector 2 and the second L-shaped cross-section annular connector 201 respectively. After one end of the two L-shaped cross-section connecting tubes 4 is inserted into the two rotating tubes 3, a sealing ring 5 is provided between it and the outer end faces of the first L-shaped cross-section annular connector 2 and the second L-shaped cross-section annular connector 201 respectively. The sealing ring 5 seals the one end of the two L-shaped cross-section connecting tubes 4 with the outer end faces of the first L-shaped cross-section annular connector 2 and the second L-shaped cross-section annular connector 201 respectively.

[0025] Please see Figure 2 and Figure 3 The inner end face of the first L-shaped cross-section annular connector 2 is fixedly connected to the upper and lower ends of the corrugated pipe 1 with a first connecting rod 202. The inner end face of the second L-shaped cross-section annular connector 201 is fixedly connected to the upper and lower ends of the corrugated pipe 1 with a second connecting rod 203. The two second connecting rods 203 are inserted between the two first connecting rods 202 and are rotatably connected to the two first connecting rods 202 through a rotating shaft 204. When it is necessary to adjust the connection angle, the first connecting rod 202 and the second connecting rod 203 are rotated together through the rotating shaft 204, so that the first L-shaped cross-section annular connector 2 and the second L-shaped cross-section annular connector 201 can rotate relative to each other, so that the corrugated pipe 1 can be flexibly bent to adapt to the pipe connection requirements of different angles.

[0026] Working Principle: In use, the ends of the two PPR pipes to be connected are first heat-fused to soften their surfaces before being inserted into two L-shaped cross-section connecting pipes 4. The interlocking teeth 402 on the inner wall of the L-shaped cross-section connecting pipe 4 form a fitting structure with the heat-fused outer wall of the PPR pipe, achieving a secure seal after cooling. When the connection angle needs adjustment, the first connecting rod 202 and the second connecting rod 203, through the rotation of the rotating shaft 204, allow the first L-shaped cross-section annular connector 2 and the second L-shaped cross-section annular connector 201 to rotate relative to each other, causing the bellows 1 to flexibly bend to adapt to different pipe connection angles. Finally, rotating the rectangular lever 301 on the rotating pipe 3 causes the L-shaped cross-section connecting pipe 4 to move inward through the engagement of the internal thread 302 and the external thread 401, compressing the sealing ring 5 to form a double seal. This structure achieves angle self-adaptation through the expansion and contraction of the bellows 1 and its rotational structure, while using threaded fastening and toothed interlocking to ensure a tight seal, effectively solving the problem of traditional fixed joints being unable to adjust angles.

[0027] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A variable diameter adaptive PPR pipe fitting, comprising a bellows (1), characterized in that: The corrugated pipe (1) is fixedly connected to a first L-shaped cross-section annular connector (2) and a second L-shaped cross-section annular connector (201) at both ends. The outer walls of the first L-shaped cross-section annular connector (2) and the second L-shaped cross-section annular connector (201) are fixedly connected to a tightening ring (205) on the side away from the corrugated pipe (1). The outer side of the tightening ring (205) is rotatably connected to a rotating pipe (3). The outer side of the two rotating pipes (3) is connected to an L-shaped cross-section connecting pipe (4). The inner end face of the first L-shaped cross-section annular connector (2) is fixedly connected to the upper and lower ends of the corrugated pipe (1). The inner end face of the second L-shaped cross-section annular connector (201) is fixedly connected to the upper and lower ends of the corrugated pipe (1).

2. The variable diameter adaptive PPR pipe fitting according to claim 1, characterized in that: The two second connecting rods (203) are inserted between the two first connecting rods (202) and are rotatably connected to the two first connecting rods (202) respectively through a rotating shaft (204).

3. The variable diameter adaptive PPR pipe fitting according to claim 1, characterized in that: The outer wall of the rotating tube (3) is fixedly connected with a ring array of rectangular paddles (301), and the inner wall of the rotating tube (3) is fixedly connected with an internal thread (302).

4. A variable diameter adaptive PPR pipe fitting according to claim 3, characterized in that: The L-shaped cross-section connecting pipe (4) has an external threaded part (401) fixedly connected to its outer wall.

5. A variable diameter adaptive PPR pipe fitting according to claim 4, characterized in that: The L-shaped cross-section connecting pipe (4) is inserted into the rotating pipe (3) and the external thread (401) is threadedly connected to the internal thread (302).

6. A variable diameter adaptive PPR pipe fitting according to claim 1, characterized in that: The inner wall of the L-shaped cross-section connecting pipe (4) is provided with multiple interlocking teeth (402).

7. A variable diameter adaptive PPR pipe fitting according to claim 1, characterized in that: After one end of each of the two L-shaped cross-section connecting pipes (4) is inserted into the two rotating pipes (3), a sealing ring (5) is provided between the two pipes and the outer end face of the first L-shaped cross-section annular connector (2) and the second L-shaped cross-section annular connector (201).

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