Connecting structure of PVC (polyvinyl chloride) pipe fitting

Abstract

The utility model discloses a connecting structure of PVC (polyvinyl chloride) pipe fittings, relates to the field of PVC pipes, solves the problems that the connecting effect between the existing PVC pipe fittings is easy to deform and the sealing performance is poor, and adopts the following scheme that the connecting structure comprises a protective outer pipe sleeved between two groups of PVC pipes; a protective inner pipe is arranged on the inner side of the protective outer pipe, a pipe groove is formed between the protective outer pipe and the protective inner pipe, and a blade set located in the pipe groove is arranged in the inner side wall of the protective outer pipe. The blade group is cut into the outer wall of the PVC pipe end; according to the connecting structure of the PVC pipe fitting, the blade sets are arranged at the two ends of the protective outer pipe, the blade sets can be screwed into the outer wall of an external PVC pipe by rotating the protective outer pipe during connection, the connecting effect is guaranteed, in the screwing-in process, the inner wall of the PVC pipe is tightly attached to and extruded on the outer wall of the protective inner pipe, and meanwhile a sealing lantern ring between the inner wall and the protective inner pipe is extruded, so that the PVC pipe fitting is prevented from being damaged. And the deformation is filled into the gap between the PVC pipe and the outer wall of the protective inner pipe, so that the sealing performance of the joint is ensured, and the operation is simple.

Description

Technical Field

[0001] The utility model relates to the technical field of PVC pipes, in particular to a connection structure of PVC pipe fittings. Background Art

[0002] The main component of PVC is polyvinyl chloride, and other ingredients are added to enhance its heat resistance, toughness and ductility.

[0003] In the application with patent application number CN202320714367.4, a connection structure of PVC pipe fittings is disclosed, which includes a protective outer tube, a connecting inner wall tube is fixedly connected inside the protective outer tube, a connecting cavity is arranged between the protective outer tube and the connecting inner wall tube, a retaining net is fixedly connected inside the connecting inner wall tube, a cleaning cavity that is interconnected is fixedly connected to the protective outer tube, a cleaning cover is snap-connected to the cleaning cavity, a cleaning handle is fixedly connected to the outer surface of the cleaning cover, and a cleaning piece is fixedly connected to the inner wall of the cleaning cover. By providing the protective outer tube, the connecting inner wall tube, and the connecting cavity, the connection end of the PVC pipe fitting can be protected, the anti-collision performance of the connection is improved, and the service life of the connection is improved; the cleaning cavity, the cleaning cover, the cleaning piece, and the retaining net can be used to clean some larger impurities to prevent the impurities from agglomerating and affecting the water output of the pipe fittings, which is very convenient to use.

[0004] The above application document achieves the cleaning of impurities by providing a protective outer tube and a cleaning component therein between two groups of PVC tubes, but how the protective outer tube is connected to the PVC tube is not disclosed. Currently, a threaded set is generally used, but since PVC tubes are prone to deformation and aging, leakage may occur at the connection, affecting the connection effect.

[0005] Therefore, we proposed a connection structure for PVC pipe fittings. Utility Model Content

[0006] In view of the deficiencies of the prior art, the utility model provides a connection structure for PVC pipe fittings, which solves the problem that the connection effect between the existing PVC pipe fittings is easily affected by deformation and has poor sealing performance.

[0007] To achieve the above objectives, the utility model is implemented through the following technical solutions: a connection structure of PVC pipe fittings, including a protective outer pipe sleeved between two groups of PVC pipes;

[0008] A protective inner tube is arranged inside the protective outer tube, a tube groove is arranged between the protective outer tube and the protective inner tube, and a blade group located in the tube groove is arranged in the inner wall of the protective outer tube;

[0009] The outer edge of the blade set is a sharpened edge, the thickness of the blade set is half of the distance between the protective outer tube and the protective inner tube, and the blade set cuts into the outer wall of the PVC pipe end.

[0010] Preferably, the protective outer tube and the protective inner tube are an integrated tube, and the outer end of the protective inner tube is arranged 2 cm inside the outer end of the protective outer tube;

[0011] Among them, the setting of the length of the protective inner pipe makes it easy to select the external PVC pipe into the pipe groove between it and the protective outer pipe, thereby ensuring the connection effect.

[0012] Preferably, a sealing ring is fixedly mounted on the outer wall of the protective inner tube and is located at the outer edge thereof, and the sealing ring is made of soft rubber;

[0013] The setting of the sealing ring facilitates the PVC pipe to be screwed in and deformed under pressure, and at the same time, it is squeezed and filled in the gap between the protective inner pipe and the PVC pipe wall to ensure the sealing effect.

[0014] Preferably, the blade set is a spiral blade, and the blades of the blade set are tilted downward by 45 degrees;

[0015] The shape and angle of the blade set are set so that it can cut into the external PVC pipe wall when rotating, thereby ensuring the connection effect.

[0016] Preferably, the specification of the pipe groove between the protective outer pipe and the protective inner pipe is the same as the thickness of the wall of the external PVC pipe.

[0017] The utility model provides a connection structure of PVC pipe fittings, which has the following beneficial effects:

[0018] The connection structure of the PVC pipe fitting, through the arrangement of the blade groups at both ends of the protective outer pipe, can rotate the protective outer pipe to make the blade groups rotate into the outer wall of the external PVC pipe when connecting, thereby ensuring the connection effect. During the rotating process, the inner wall of the PVC pipe is tightly pressed against the outer wall of the protective inner pipe, and the sealing collar therebetween is squeezed to deform and fill the gap between the PVC pipe and the outer wall of the protective inner pipe, thereby ensuring the sealing of the connection. At the same time, the operation is simple, and the problem that the connection effect between existing PVC pipe fittings is easily affected by deformation and has poor sealing is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] Figure 2 It is a schematic diagram of the structure of the inner side of the utility model;

[0021] Figure 3 For this utility model Figure 2 Schematic diagram of the structure enlarged at point A in the middle.

[0022] In the figure: 1. Protective outer tube; 2. Protective inner tube; 3. Tube groove; 4. Blade assembly; 5. Sealing ring. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Example 1

[0025] See also Figure 1-3 The embodiment of the utility model provides a technical solution: a connection structure of a PVC pipe fitting, comprising a protective outer tube 1 sleeved between two groups of PVC pipes; a protective inner tube 2 is arranged on the inner side of the protective outer tube 1, a pipe groove 3 is arranged between the protective outer tube 1 and the protective inner tube 2, and a blade group 4 located in the pipe groove 3 is arranged in the inner wall of the protective outer tube 1; the outer edge of the blade group 4 is a sharpened edge, the thickness of the blade group 4 is half of the distance between the protective outer tube 1 and the protective inner tube 2, and the blade group 4 cuts into the outer wall of the PVC pipe end.

[0026] Among them, the connection structure of the PVC pipe fitting, through the arrangement of the blade group 4 at both ends of the protective outer tube 1, can rotate the protective outer tube 1 to make the blade group 4 screwed into the outer wall of the external PVC pipe when it is connected, thereby ensuring its connection effect. During the screwing-in process, the inner wall of the PVC pipe is tightly pressed against the outer wall of the protective inner tube 2, and at the same time, the sealing ring 5 therebetween is squeezed to deform and fill the gap between the PVC pipe and the outer wall of the protective inner tube 2, thereby ensuring the sealing of the connection. At the same time, the operation is simple, which solves the problem that the connection effect between existing PVC pipe fittings is easily affected by deformation and has poor sealing.

[0027] Example 2

[0028] The protective outer tube 1 and the protective inner tube 2 are an integrated tube, and the outer end of the protective inner tube 2 is arranged 2 cm inside the outer end of the protective outer tube 1; wherein, the length of the protective inner tube 2 is set to facilitate the selection of the external PVC tube into the pipe groove 3 between it and the protective outer tube 1 to ensure the connection effect.

[0029] A sealing ring 5 is fixedly installed on the outer wall of the protective inner tube 2 at its outer edge, and the sealing ring 5 is made of soft rubber; wherein, the setting of the sealing ring 5 facilitates the PVC tube to be screwed in and deformed under pressure, and at the same time, it is squeezed and filled in the gap between the protective inner tube 2 and the PVC tube wall to ensure the sealing effect.

[0030] The blade set 4 is a spiral blade, and the blades of the blade set 4 are tilted downward by 45 degrees; wherein, the shape and angle of the blade set 4 are set so that it is convenient for it to cut into the external PVC pipe wall when rotating, thereby ensuring the connection effect.

[0031] The specification of the pipe groove 3 between the protective outer pipe 1 and the protective inner pipe 2 is the same as the thickness of the wall of the external PVC pipe.

[0032] The working principle and use process of the utility model are as follows: when the device is needed to work, the ends of the two groups of PVC pipes are placed on both sides and then rotated inwards, and the protective outer pipe 1 can be rotated in the opposite direction at the same time, so that the blade group 4 on the inside thereof rotates and cuts into the outer wall of the PVC pipe to ensure the connection effect. While squeezing and rotating, the inner wall of the PVC pipe will directly contact the outer wall of the protective inner pipe 2, and at the same time squeeze the sealing ring 5 therebetween, so that it is deformed and filled in the gap therebetween to ensure the sealing of the connection.

Claims

1. A PVC pipe connection structure, comprising a protective outer pipe (1) sleeved between two groups of PVC pipes; Features: A protective inner tube (2) is arranged on the inner side of the protective outer tube (1), a tube groove (3) is arranged between the protective outer tube (1) and the protective inner tube (2), and a blade group (4) located in the tube groove (3) is arranged in the inner side wall of the protective outer tube (1); The outer edge of the blade set (4) is a sharpened edge, the thickness of the blade set (4) is half the distance between the protective outer tube (1) and the protective inner tube (2), and the blade set (4) cuts into the outer wall of the PVC tube end.

2. A PVC pipe connection structure according to claim 1, characterized in that: The protective outer tube (1) and the protective inner tube (2) are an integrated tube, and the outer end of the protective inner tube (2) is arranged 2 cm inside the outer end of the protective outer tube (1).

3. A connection structure of PVC pipe fittings according to claim 1, characterized in that: A sealing collar (5) is fixedly mounted on the outer wall of the protective inner tube (2) and is located at the outer edge thereof, and the sealing collar (5) is made of soft rubber.

4. The connection structure of a PVC pipe fitting according to claim 1, characterized in that: The blade set (4) is a spiral blade, and the blades of the blade set (4) are tilted downward at 45 degrees.

5. The connection structure of a PVC pipe fitting according to claim 1, characterized in that: The specification of the pipe groove (3) between the protective outer pipe (1) and the protective inner pipe (2) is the same as the thickness of the wall of the external PVC pipe.

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