Metal expansion repair plastic short pipe joint

Abstract

The utility model relates to the technical field of pipe joints, and discloses a metal expansion repair plastic short pipe joint which comprises a pressure-bearing ring and connecting pipes fixedly connected to the two sides of the pressure-bearing ring, the diameter of the inner wall of the pressure-bearing ring is equal to that of the inner wall of the two connecting pipes, and expansion assemblies are arranged on the outer walls of the ends, away from the pressure-bearing ring, of the two connecting pipes. And the expansion assembly is used for elastically expanding and fixing the end part of the plastic pipeline towards the outer side. According to the metal expansion repair plastic short pipe joint, the expansion assembly is arranged on the outer side of the connecting pipe, when the connecting pipe is inserted into the plastic pipe, the end of the plastic pipe can be supported through the expansion assembly, the plastic pipe tightly holds the iron joint according to the elasticity principle of plastic, and the sealing effect is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to pipe joint technical field, concretely is a kind of metal expansion repair plastic short pipe joint. BACKGROUND

[0002] Plastic pipe joint is the accessory for connecting plastic pipeline, is widely used in water supply and drainage, chemical industry, agricultural irrigation, building and other fields. Their role is to connect plastic pipes of different lengths or diameters, ensure that liquid or gas can flow smoothly, while ensuring the sealing and stability of the system.

[0003] The patent with the announcement number CN211901922U currently discloses a leakage-proof drain pipe joint, which comprises a metal pipe, an annular protrusion is fixedly connected to the inner wall of the metal pipe, a water-swelling sealing rubber strip is inlaid into the inner wall of the annular protrusion, a support rod is symmetrically welded to the outer wall of each end of the metal pipe, a hoop is fixedly connected to one end of the support rod, a through hole is formed in the surface of the hoop, an arc-shaped plate is movably connected to one side of the hoop, guide rods are symmetrically inserted into the surface of the arc-shaped plate, springs are sleeved onto the outer wall of the guide rods, a limiting block is fixedly connected to one end of the guide rods, a metal rod is welded to the inner side of the arc-shaped plate, and a pipe body is mounted in the inner side of the hoop. A recess is formed in the outer wall of the pipe body. The pipe body can be effectively fixed and limited, so that the pipe body can be effectively prevented from loosening, water can be prevented from seeping out from the joint, and the sealing performance of the joint between the pipe body and the metal pipe can be improved to effectively prevent leakage.

[0004] However, the pipe joint in the above-mentioned technology still has the following problems: during use, the hoop on the outer side of the pipe joint may be loose, which may cause the connection between the pipe joint and the pipeline to be loose, and leakage may occur. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies of the prior art, the utility model provides a metal expansion repair plastic short pipe joint to improve the sealing effect of the connection between the pipe and the joint.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a metal expansion repair plastic short pipe joint, which comprises a pressure-bearing ring and two connecting pipes fixedly connected to the two sides of the pressure-bearing ring, the inner wall diameters of the pressure-bearing ring and the two connecting pipes are equal, the outer wall of one end of each of the two connecting pipes away from the pressure-bearing ring is provided with an expansion assembly, and the expansion assembly is used for elastically expanding and fixing the end portion of the plastic pipeline outward.

[0007] Further, the outer wall of one end of each of the two connecting pipes away from the pressure-bearing ring is provided with external thread teeth, and the expansion assembly is located between the external thread teeth and the pressure-bearing ring.

[0008] Further, the expansion assembly comprises a plurality of expansion rings, the plurality of expansion rings are equidistantly and spacedly distributed, and each of the plurality of expansion rings is fixedly arranged on the outer side of the connecting pipe.

[0009] Further, the diameter of the external thread is smaller than the diameter of the expansion ring.

[0010] Further, the two external threads of the two connecting pipes are rotated in the same direction.

[0011] Further, the two external threads of the two connecting pipes are rotated in the opposite directions.

[0012] Further, the outer side of the pressure bearing ring is designed as a non-circular shape.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] The metal expansion repair plastic short pipe joint sets the expansion assembly on the outer side of the connecting pipe, when the connecting pipe is inserted into the plastic pipe, the end of the plastic pipe is lifted by the expansion assembly, and the plastic pipe tightly holds the iron joint by the elastic principle of the plastic, and the sealing effect is increased. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the front view of the connecting structure of the utility model;

[0016] Figure 2 It is another front view of the utility model;

[0017] Figure 3 It is the schematic view of the connecting structure based on Figure 2 .

[0018] In the drawing: 1, pressure bearing ring; 2, connecting pipe; 3, external thread; 4, expansion ring. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0020] Please refer to Figures 1 to 3 , a metal expansion repair plastic short pipe joint, comprising a pressure bearing ring 1 and two connecting pipes 2 fixedly connected on both sides of the pressure bearing ring 1, the inner wall diameter of the pressure bearing ring 1 is equal to that of the two connecting pipes 2, the outer wall of the two connecting pipes 2 away from the pressure bearing ring 1 is provided with an expansion assembly, and the expansion assembly is used for elastically expanding and fixing the end of the plastic pipe outward.

[0021] As shown in Figures 1 to 3 , the main improvement point of the utility model is to improve the sealing effect of the plastic pipe connecting position, as Figures 1 to 3As shown, the metal expansion repair plastic short pipe joint in the utility model, the end of the plastic pipe is sleeved on the outside of the connecting pipe 2 or the connecting pipe 2 is inserted into the end of the plastic pipe, at this time the expansion assembly on the outside of the connecting pipe 2 can expand the end of the plastic pipe outward, by expanding the end of the plastic pipe, the elastic principle of the plastic pipe is utilized, when the plastic pipe is contracted inward, the connecting pipe 2 is tightly wrapped on the inside, thereby the sealing effect between the plastic pipe and the connecting pipe 2 is improved, the pressure bearing ring 1 between the two connecting pipes 2 can ensure that the splicing lengths of the two ends are close when the two plastic pipes are spliced, the problem that the splicing of one end is too short to cause looseness is avoided.

[0022] As shown in the figure, Figures 1 to 3 The outer wall of the end of the connecting pipe 2 away from the pressure bearing ring 1 is provided with external thread teeth 3, and the expansion assembly is located between the external thread teeth 3 and the pressure bearing ring 1. When the connecting pipe 2 is inserted into the end of the plastic pipe, the external thread teeth 3 first enter the plastic pipe, when the plastic pipe expands, the inward extrusion force is too tight, and the connecting pipe 2 cannot be continuously inserted into the plastic pipe, at this time, the connecting pipe 2 or the plastic pipe can be rotated, the tapping effect of the external thread teeth 3 is utilized, the connecting pipe 2 is continuously moved into the plastic pipe, and the connection between the connecting pipe 2 and the plastic pipe is more firm, and the convenience of the installation of the connecting pipe 2 and the plastic pipe is improved.

[0023] As shown in the figure, Figures 1 to 3 The expansion assembly comprises a plurality of expansion rings 4, the plurality of expansion rings 4 are equidistantly spaced, and the plurality of expansion rings 4 are fixedly arranged on the outside of the connecting pipe 2. When the connecting pipe 2 is inserted into the plastic pipe, the plurality of expansion rings 4 can support the end of the plastic pipe to form a corrugated shape, so that the plastic pipe is contracted inward at the groove position between the two adjacent expansion rings 4 and is tightly wrapped on the outside of the connecting pipe 2, the connection firmness of the connecting pipe 2 and the plastic pipe is improved, and the corrugated shape can make the inner wall of the plastic pipe and the outer wall of the connecting pipe 2 be more closely connected, and the sealing effect of the connection is improved.

[0024] As shown in the figure, Figures 1 to 3 The diameter of the external thread teeth 3 is smaller than the diameter of the expansion ring 4. The diameter of the external thread teeth 3 is set to be smaller, so that the external thread teeth 3 can be more easily inserted into the plastic pipe, and after the external thread teeth 3 need to enter the plastic pipe again, the internal thread of the plastic pipe can be tapped out by rotating, so that the connecting pipe 2 can be continuously inserted into the plastic pipe.

[0025] As shown in the figure, Figures 1 to 3 The rotating directions of the two external thread teeth 3 of the two ends of the two connecting pipes 2 away from each other are the same. The external thread teeth 3 of the two ends of the two connecting pipes 2 are set to rotate in opposite directions, so that after the plastic pipe is connected with the two connecting pipes 2 respectively, the two connecting pipes 2 can be continuously inserted into the plastic pipe by the opposite rotation of the two plastic pipes and the cooperation of the external thread teeth 3.

[0026] AsFigure 2 and Figure 3 As shown, the two external threads 3 of the two connecting pipes 2, which are far apart from each other, rotate in opposite directions. By setting the rotation directions of the two external threads 3 to be the same, even when the plastic pipes are difficult to rotate, the two connecting pipes 2 can continue to be inserted into the two plastic pipes by rotating the pressure ring 1 and the connecting pipe 2, and the tapping effect of the external threads 3 can gradually pull the two plastic pipes closer to the middle.

[0027] like Figure 2 and Figure 3 As shown, the outer side of the pressure ring 1 is not circular. Making the outer side of the pressure ring 1 non-circular makes it easier to rotate the pressure ring 1. For example, with an equilateral hexagonal structure, the pressure ring 1 can be turned with an adjustable wrench to rotate the connecting pipe 2.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A metal expansion joint repair for a plastic spool joint, characterized by: The utility model relates to a plastic pipe connecting device, including pressure circle (1) and fixedly connected in pressure circle (1) both sides connecting pipe (2), pressure circle (1) with two connecting pipe (2) inner wall diameter equality, two connecting pipe (2) far from pressure circle (1) one end outer wall all are equipped with expansion assembly, and expansion assembly is used to the outside elastic expansion fixed with plastic pipe way end.

2. A metal expansion joint for repairing a plastic short tube joint according to claim 1, characterized in that: The outer wall of the connecting pipe (2) far from the pressure circle (1) one end is provided with external thread thread (3), and the expansion assembly is located between the external thread thread (3) and the pressure circle (1).

3. A metal expansion joint repair for plastic pipe according to claim 2, wherein: The expansion assembly includes a plurality of expansion rings (4), which are equidistantly spaced apart between the plurality of expansion rings (4), and the plurality of expansion rings (4) are fixedly arranged on the outer side of the connecting pipe (2).

4. The metal expansion joint for repairing a plastic short pipe joint according to claim 2, characterized in that: The diameter of the external thread thread (3) is smaller than the diameter of the expansion ring (4).

5. The metal expansion joint repair sleeve of claim 2, wherein: The rotation directions of the two external thread threads (3) at the ends of the two connecting pipes (2) away from each other are the same.

6. The metal expansion joint repair sleeve of claim 2, wherein: The rotation directions of the two external thread threads (3) at the ends of the two connecting pipes (2) away from each other are opposite.

7. A metal expansion joint repair for a plastic short pipe joint according to claim 6, characterized in that: The outer side of the pressure circle (1) is designed as a non-circular shape.

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