PPR pipe joint suitable for different diameters

Abstract

The utility model discloses a PPR pipe joint suitable for different diameters, relates to the field of PPR pipe joints, and aims to solve the problems that in the prior art, the size of a single joint is fixed, only PPR pipes with one diameter can be connected, and the single joint is not suitable for connecting two PPR pipes with different diameters. The rear end of the son connector is connected with the mother connector, conical inserting grooves are formed in the front end face of the son connector and the rear end face of the mother connector, the middle of the interior of each conical inserting groove is fixedly connected with a blocking pipe, a plurality of annular teeth are arranged on the inner wall of each conical inserting groove in an array mode and fixedly connected with the inner wall of each conical inserting groove, and the front end of the outer wall of the mother connector is fixedly connected with a jacking ring. By means of the conical slot structure and the design of the annular teeth, the PPR pipe joint can be matched with PPR pipes with different diameters, a hot-melted pipe and the joint form tight engagement, the sealing performance and the connecting strength are improved, and the problem that a traditional joint can only fix a single pipe diameter is solved.

Description

Technical Field

[0001] This utility model relates to the field of PPR pipe fittings, specifically a PPR pipe fitting suitable for different diameters. Background Technology

[0002] PPR pipe (random copolymer polypropylene pipe) is a high-performance plastic pipe made of random copolymer polypropylene, featuring high temperature resistance, pressure resistance, and corrosion resistance. Its long-term operating temperature can reach 70℃, and its short-term high-temperature resistance can reach 95℃, making it suitable for hot and cold water systems, HVAC, and drinking water transportation. PPR pipes use a heat fusion connection method, resulting in high joint strength and excellent sealing, eliminating the risk of leakage. Furthermore, its smooth inner wall reduces water flow resistance, is not prone to scaling, and its hygienic performance meets drinking water standards. Two PPR pipes must be connected using a connector.

[0003] For example, patent announcement number CN207599225U discloses a PPR pipe connector, including an upper fixing ring, an upper locking block, a lower locking block, a lower fixing ring, a fixing ring, an upper fixing plate, and a lower fixing plate. Lower fixing rings are installed on both sides of the outer side of the lower locking block, and a lower locking groove is provided in the middle of each lower fixing ring. Lower fixing plates are horizontally installed on both sides of the lower locking block, and a lower fixing screw hole is provided in the middle of each lower fixing plate. Lower threaded grooves are provided on both sides of the inner side of the lower locking block, and PPR pipes are horizontally installed on the lower threaded grooves. This utility model, by installing the upper fixing ring, lower fixing ring, upper fixing plate, and lower fixing plate, allows the upper fixing ring and lower fixing ring to be fixedly connected during use, and then the upper fixing plate and lower fixing plate are fixedly connected by fixing nuts. The entire device is easy to disassemble and install.

[0004] However, the above-mentioned technology has a fixed size for a single connector, which can only connect PPR pipes of one diameter and is not suitable for connecting PPR pipes of two different diameters. Therefore, the market urgently needs to develop a PPR pipe connector that is suitable for different diameters to help people solve the existing problems. Utility Model Content

[0005] The purpose of this invention is to provide a PPR pipe fitting suitable for different diameters, in order to solve the problem in the prior art where a single fitting has a fixed size and can only connect PPR pipes of one diameter, and is not suitable for connecting PPR pipes of two different diameters.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a PPR pipe fitting suitable for different diameters, comprising a female fitting and a male fitting, wherein the female fitting is connected to the rear end of the female fitting, and both the front end face of the female fitting and the rear end face of the female fitting are provided with a conical slot, a barrier tube is fixedly connected to the middle of the conical slot, and multiple annular teeth are arrayed and fixedly connected on the inner wall of the conical slot, a tightening ring is fixedly connected to the front end of the outer wall of the female fitting, and a rotating tube is rotatably connected to the outside of the tightening ring.

[0007] Preferably, the internal barrier tubes of the sub-connector and the female connector are connected by a circular opening, a first sealing ring is provided between the rear end face of the sub-connector and the front end face of the female connector at the edge of the circular opening, and a second sealing ring is provided between the rear end face of the sub-connector and the front end face of the female connector outside the first sealing ring.

[0008] Preferably, both the first sealing ring and the second sealing ring are fixedly connected to the front end face of the female connector.

[0009] Preferably, the rear end of the outer wall of the sub-joint is fixedly connected to an external threaded portion, and the rear end of the inner wall of the rotating tube is fixedly connected to an internal threaded portion. The rotating tube is fitted into the rear end of the outer wall of the sub-joint, and the external threaded portion and the internal threaded portion are threadedly connected.

[0010] Preferably, the outer wall of the sub-joint is provided with a ring array of multiple threaded holes in the middle, and the front end of the upper end face of the rotating tube is provided with a rectangular groove, and the lower end face of the rectangular groove is connected to the inner wall of the rotating tube through a strip opening.

[0011] Preferably, the rotating tube is inserted into the rectangular groove and through the strip opening by a screw, and then inserted into a threaded hole on the sub-connector and threadedly connected and fixed to the sub-connector.

[0012] Preferably, the outer rear end of the rotating tube is arranged in a ring and fixedly connected with multiple rectangular paddles.

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

[0014] (1) In this utility model, by setting a conical slot structure and annular tooth design, it can be adapted to PPR pipes of different diameters, so that the pipe and the joint after hot melting can form a tight fit, improve the sealing performance and connection strength, and solve the problem that traditional joints can only fix a single pipe diameter.

[0015] (2) In this utility model, a combination structure of male and female connectors is adopted, along with a rotating tube and threaded locking mechanism, making the connection process more convenient. At the same time, the double sealing design of the first and second sealing rings effectively prevents leakage and improves the reliability of the connector.

[0016] (3) In this utility model, a screw fixing structure is added. After the rotating tube tightens the sub-connector and the female connector, the rotating tube is rotated slightly (achieved by the elastic deformation of the first sealing ring and the second sealing ring) so that the strip opening on the rotating tube is aligned with the single threaded hole on the outer wall of the sub-connector. Then, the rotating tube is fixed to the sub-connector by screws to restrict the rotation of the rotating tube, thereby effectively preventing the sub-connector and the female connector from separating. Attached Figure Description

[0017] Figure 1 This is a front view of a PPR pipe fitting of different diameters according to the present invention;

[0018] Figure 2 This is a side sectional view of the connector of this utility model;

[0019] Figure 3 This is a main sectional view of the threaded hole 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. Sub-connector; 101. Conical slot; 102. Barrier tube; 103. Circular through-hole; 104. Ring tooth; 105. External thread; 106. Threaded hole; 2. Female connector; 201. First sealing ring; 202. Second sealing ring; 203. Tightening ring; 3. Rotating tube; 301. Rectangular lever; 302. Internal thread; 303. Rectangular groove; 304. Strip opening; 4. Screw. 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 Figure 1-4This utility model provides an embodiment of a PPR pipe fitting suitable for different diameters, including a female fitting 1 and a female fitting 2. The female fitting 2 is connected to the rear end of the female fitting 1. Both the front end face of the female fitting 1 and the rear end face of the female fitting 2 are provided with a conical slot 101. A barrier tube 102 is fixedly connected to the middle part of the conical slot 101. Multiple annular teeth 104 are arrayed and fixedly connected on the inner wall of the conical slot 101. By heat-melting the outer walls of the PPR pipe fittings of different diameters, the two PPR pipes are heat-melted and inserted into the conical slots 101 of the female fitting 1 and the female fitting 2 respectively, so that the barrier tube 104... 2. Insert the PPR pipe into the PPR pipe joint, positioning the PPR pipe joint between the conical slot 101 and the outer wall of the barrier pipe 102. When the conical slot 101 is inserted into the PPR pipe joint, the molten pipe wall contacts the annular teeth 104 on the inner wall of the conical slot 101. As the PPR pipe is gradually inserted, the molten pipe wall engages and is fixed with multiple annular teeth 104. At the same time, the molten pipe wall fills the space between adjacent annular teeth 104 to form an interlocking structure and achieve a seal. The conical slot 101 facilitates the insertion of PPR pipes of different diameters, thereby enabling the connection of PPR pipes of different diameters.

[0024] Please see Figure 2 and Figure 4 A tightening ring 203 is fixedly connected to the front end of the outer wall of the female connector 2. A rotating tube 3 is rotatably connected to the outside of the tightening ring 203. An external thread 105 is fixedly connected to the rear end of the outer wall of the male connector 1. An internal thread 302 is fixedly connected to the rear end of the inner wall of the rotating tube 3. The rotating tube 3 is fitted into the rear end of the outer wall of the male connector 1, and the external thread 105 and the internal thread 302 are threadedly connected. Multiple rectangular paddles 301 are arranged in a ring and fixedly connected to the rear end of the outer wall of the rotating tube 3. After the two PPR tubes are fixed to the male connector 1 and the female connector 2 respectively, the male connector 1 and the female connector 2 are connected by the rotating tube 3. At the same time, the tightening ring 203 helps to connect the male connector 1 and the female connector 2. The two PPR pipes are connected by a first sealing ring 201 between the rear end face of the sub-connector 1 and the front end face of the female connector 2, and a second sealing ring 202 between the rear end face of the sub-connector 1 and the front end face of the female connector 2, and outside the first sealing ring 201. The first sealing ring 201 and the second sealing ring 202 are fixedly connected to the front end face of the female connector 2. When the sub-connector 1 and the female connector 2 are tightly connected, they are sealed by the first sealing ring 201 and the second sealing ring 202. The barrier tubes 102 inside the sub-connector 1 and the female connector 2 are connected by the circular opening 103, so that the two PPR pipes are connected by the circular opening 103.

[0025] Please see Figure 2 and Figure 3The outer wall of the sub-connector 1 has a ring array of multiple threaded holes 106 in the middle. The front end of the upper surface of the rotating tube 3 has a rectangular groove 303. The lower end of the rectangular groove 303 is connected to the inner wall of the rotating tube 3 through a strip opening 304. The rotating tube 3 and the sub-connector 1 are connected by a screw 4 which extends into the rectangular groove 303, passes through the strip opening 304, and is inserted into a threaded hole 106 on the sub-connector 1 and threadedly connected and fixed. After the rotating tube 3 presses the sub-connector 1 and the female connector 2 together, the rotating tube 3 is rotated slightly (achieved by the elastic deformation of the first sealing ring 201 and the second sealing ring 202) to align the strip opening 304 on the rotating tube 3 with a single threaded hole 106 on the outer wall of the sub-connector 1. Then, the rotating tube 3 and the sub-connector 1 are fixed by the screw 4 to restrict the rotation of the rotating tube 3, thereby effectively preventing the sub-connector 1 and the female connector 2 from separating.

[0026] Working Principle: In use, the ends of two PPR pipes of different diameters are first heat-fused, and then inserted into the tapered slots 101 at the front ends of the female connector 1 and male connector 2, respectively. During insertion, the heat-fused PPR pipe walls tightly engage with the annular teeth 104 on the inner wall of the tapered slot 101. The molten material fills the gaps between the annular teeth 104, forming a double-seal structure. Simultaneously, the barrier tube 102 inserts into the inner cavity of the PPR pipe, providing stable support. During connection, the rotating tube 3 is rotated so that its internal thread 302 is screwed along the external thread 105 of the female connector 1, pushing the tightening ring 203 to press the female connector 2 tightly against the female connector 1. At this point, the first sealing ring 201 and the second sealing ring 202 form a double seal. Finally, a screw 4 is passed through the strip opening 304 of the rotating tube 3 and fixed into the threaded hole 106 of the female connector 1 to prevent loosening. This design, through the tapered slot structure and adjustable rotating tube mechanism, achieves compatible connection of PPR pipes of different diameters and provides anti-loosening and multiple sealing functions.

[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 PPR pipe fitting suitable for different diameters, comprising a female fitting (1) and a male fitting (2), characterized in that: The rear end of the sub-connector (1) is connected to the female connector (2). Both the front end face of the sub-connector (1) and the rear end face of the female connector (2) are provided with a conical slot (101). A barrier tube (102) is fixedly connected to the middle part of the conical slot (101). Multiple annular teeth (104) are arranged in an array and fixedly connected on the inner wall of the conical slot (101). A tightening ring (203) is fixedly connected to the front end of the outer wall of the female connector (2). A rotating tube (3) is rotatably connected to the outside of the tightening ring (203).

2. A PPR pipe fitting suitable for different diameters according to claim 1, characterized in that: The barrier tubes (102) inside the sub-connector (1) and the female connector (2) are connected by a circular opening (103). A first sealing ring (201) is provided between the rear end face of the sub-connector (1) and the front end face of the female connector (2) at the edge of the circular opening (103). A second sealing ring (202) is provided between the rear end face of the sub-connector (1) and the front end face of the female connector (2) outside the first sealing ring (201).

3. A PPR pipe fitting suitable for different diameters according to claim 2, characterized in that: The first sealing ring (201) and the second sealing ring (202) are both fixedly connected to the front end face of the female connector (2).

4. A PPR pipe fitting suitable for different diameters according to claim 1, characterized in that: The outer rear end of the sub-connector (1) is fixedly connected to an external threaded part (105), and the inner rear end of the rotating tube (3) is fixedly connected to an internal threaded part (302). The rotating tube (3) is fitted into the outer rear end of the sub-connector (1) and the external threaded part (105) and the internal threaded part (302) are threadedly connected.

5. A PPR pipe fitting suitable for different diameters according to claim 1, characterized in that: The sub-connector (1) has a ring array of multiple threaded holes (106) in the middle of its outer wall, and the upper end face of the rotating tube (3) has a rectangular groove (303) at its front end. The lower end face of the rectangular groove (303) is connected to the inner wall of the rotating tube (3) through a strip opening (304).

6. A PPR pipe fitting suitable for different diameters according to claim 5, characterized in that: The rotating tube (3) is connected to the sub-connector (1) by a screw (4) extending into the rectangular groove (303) and passing through the strip opening (304) before being inserted into a threaded hole (106) on the sub-connector (1) and threadedly connected and fixed to the sub-connector (1).

7. A PPR pipe fitting suitable for different diameters according to claim 1, characterized in that: The outer rear end of the rotating tube (3) is arranged in a ring and fixedly connected with multiple rectangular paddles (301).

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