CN210069167U

CN210069167U - Structure of press-connection pipe fitting for aluminum-plastic pipe

Info

Publication number: CN210069167U
Application number: CN201920645465.0U
Authority: CN
Inventors: 王江; 浦相明; 何群赞; 毛智鑫
Original assignee: JIAN SANFITEC BRASS INDUSTRY Co Ltd
Current assignee: JIAN SANFITEC BRASS INDUSTRY Co Ltd
Priority date: 2019-04-30
Filing date: 2019-04-30
Publication date: 2020-02-14
Anticipated expiration: 2029-04-30

Abstract

The utility model discloses an aluminum-plastic pipe press-connection pipe fitting structure, which comprises an aluminum-plastic pipe, a pipe fitting, a retainer ring, a stainless steel sleeve and an O-shaped ring, wherein the retainer ring is positioned outside the pipe fitting, the stainless steel sleeve is sleeved outside the pipe fitting, and is abutted against the check ring, a cavity for inserting the aluminum plastic pipe is formed between the stainless steel sleeve and the pipe fitting, a first concave part, a second concave part and a step are arranged on the outer wall of the pipe fitting, an O-shaped ring is arranged in the first concave part and matched with the inner wall of the aluminum plastic pipe, the second concave part is matched with the inner wall of the aluminum plastic pipe, is used for compression joint deformation of the aluminum-plastic pipe, the step is abutted against the end of the aluminum-plastic pipe, the horizontal height of the abutting surface of the aluminum-plastic pipe and the step is increased, which is lower than the horizontal height of the abutting surface of the stainless steel sleeve and the retainer ring, during the compression joint process of the aluminum plastic pipe and the pipe fitting, the chamfering treatment is not needed to be carried out on the cutting port of the aluminum-plastic pipe, the working efficiency is effectively improved, and great convenience is brought to an operator.

Description

Structure of press-connection pipe fitting for aluminum-plastic pipe

Technical Field

The utility model belongs to the plastic-aluminum pipe field especially relates to an aluminum-plastic pipe crimping pipe fitting structure.

Background

The existing method for crimping the aluminum-plastic pipe and the pipe fitting comprises the following steps: firstly, cutting a pipeline, namely vertically and accurately cutting an aluminum-plastic pipe by using a pipe cutter; secondly, chamfering and forming, namely grinding the cut port of the aluminum-plastic pipe into a circle by using a reamer and cutting the circle into a chamfer; thirdly, inserting the pipe fitting, selecting the pipe fitting with a proper size, inserting the port of the chamfer formed by the aluminum-plastic pipe into the pipe fitting, and checking the insertion depth through the check hole on the pipe fitting to ensure that the aluminum-plastic pipe is completely inserted; and fourthly, crimping, namely selecting a proper jaw to crimp the part matched with the aluminum-plastic pipe on the pipe fitting.

Therefore, before the aluminum-plastic pipe is crimped to the pipe fitting, the cutting port of the aluminum-plastic pipe needs to be chamfered, and if the chamfering is not performed or the chamfering is not good, the cutting port of the aluminum-plastic pipe can puncture an O-shaped ring to cause a water leakage phenomenon. In addition, in the above method, the operator easily forgets the chamfering step, and cannot determine whether or not the mounting is correct.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides an effectively improve plastic-aluminum pipe crimping pipe fitting structure of crimping efficiency.

The utility model provides an aluminium-plastic pipe crimping pipe fitting structure, includes aluminium-plastic pipe, pipe fitting, retaining ring, stainless steel bushing and O type circle, the retaining ring is located the pipe fitting is outside, the stainless steel bushing cover is established the pipe fitting is outside, and with retaining ring looks butt, stainless steel bushing with formed between the pipe fitting and be used for aluminium-plastic pipe male cavity, be provided with first concave part, second concave part and step on the outer wall of pipe fitting, set up in the first concave part O type circle, O type circle with the inner wall of aluminium-plastic pipe cooperatees, the second concave part with aluminium-plastic intraductal wall cooperatees, is used for aluminium-plastic pipe crimping deformation, the step with aluminium-plastic pipe port looks butt, aluminium-plastic pipe with the level of step butt face, it is less than stainless steel bushing with the level of retaining ring butt face.

Further, the outer diameter of the pipe fitting is larger than the outer diameter of the O-shaped ring, and the inner diameter of the aluminum-plastic pipe is larger than the outer diameter of the pipe fitting.

Further, the number of the O-shaped rings is two.

Furthermore, the number of the second concave parts is multiple, and the second concave parts are respectively positioned at the upper side and the lower side of the first concave part.

Further, the cross section of the second concave part is trapezoidal and is arranged along the circumferential direction of the pipe fitting.

Furthermore, the outer wall of the stainless steel sleeve is provided with a mark point.

Further, the mark points are concave.

Further, the aluminum-plastic pipe comprises an outer layer, a middle layer and an inner layer, wherein the outer layer and the inner layer are respectively made of plastic materials, and the middle layer is made of aluminum materials.

Further, the thickness of the inner layer is greater than the thickness of the outer layer.

Further, the retainer ring is made of plastic materials.

Due to the adoption of the technology, the utility model has the advantages of it is following:

the utility model discloses the pipe fitting external diameter is greater than O type circle external diameter, and the aluminium-plastic pipe internal diameter is greater than the pipe fitting external diameter, makes the crimping in-process of aluminium-plastic pipe and pipe fitting, need not carry out the chamfer to aluminium-plastic pipe cutting port and handles, effectively improves work efficiency, brings very big facility for the operator.

The present invention will be further described with reference to the accompanying drawings and examples.

Drawings

Fig. 1 is a schematic structural view of a press-fit pipe fitting structure of an aluminum-plastic pipe according to the present invention;

fig. 2 is a schematic structural view of the pipe fitting of the present invention;

fig. 3 is a schematic structural view of the aluminum-plastic pipe crimping pipe structure of the present invention after crimping;

in the figure: 10 aluminum plastic pipes, 11 outer layers, 12 middle layers, 13 inner layers, 20 pipe fittings, 21 first concave parts, 22 second concave parts, 23 steps, 30 retaining rings, 40 stainless steel sleeves, 41 marking points, 50O-shaped rings and 60 chambers.

Detailed Description

As shown in fig. 1 to 3, the pipe crimping fitting structure of the aluminum-plastic pipe comprises an aluminum-plastic pipe 10, a pipe fitting 20, a retainer ring 30, a stainless steel sleeve 40 and an O-ring 50, wherein the retainer ring 30 is located outside the pipe fitting 20, the stainless steel sleeve 40 is sleeved outside the pipe fitting 20, and is abutted against the check ring 30, a chamber 60 for inserting the aluminum-plastic pipe 10 is formed between the stainless steel sleeve 40 and the pipe fitting 20, the outer wall of the pipe fitting 20 is provided with a first concave part 21, a second concave part 22 and a step 23, an O-shaped ring 50 is arranged in the first concave part 21, the O-shaped ring 50 is matched with the inner wall of the aluminum-plastic pipe 10, the second concave part 22 is matched with the inner wall of the aluminum-plastic pipe 10, the step 23 is used for compression joint deformation of the aluminum-plastic pipe 10, the port of the aluminum-plastic pipe 10 is abutted, the first concave part 21 and the second concave part 22 are respectively positioned at the upper part of the step 23, and the horizontal height of the abutting surface of the aluminum-plastic pipe 10 and the step 23 is lower than that of the abutting surface of the stainless steel sleeve 40 and the retaining ring 30. Therefore, after the aluminum-plastic pipe 10 is inserted into the cavity 60, the end of the aluminum-plastic pipe 10 is embedded into the pipe fitting 20, and the sealing performance of the compression joint of the aluminum-plastic pipe 10 and the pipe fitting 20 is effectively improved.

As shown in fig. 1 and 2, the inner diameter of the aluminum-plastic pipe 10 is denoted as a, the outer diameter of the pipe 20 is denoted as B, and the outer diameter of the O-ring 50 is denoted as C, where C < B < a. It can be seen that, in the process of inserting the aluminum-plastic pipe 10 into the cavity 60, the O-ring 50 is not broken by inserting the cutting port of the aluminum-plastic pipe 10, so that in the process of crimping the plastic pipe and the pipe fitting, chamfering processing is not performed on the cutting port of the aluminum-plastic pipe 10, the crimping process is simplified, the installation efficiency is improved, and great convenience is brought to an operator. On the other hand, there is a gap between the aluminum plastic pipe 10 and the pipe fitting 20, and after the crimping is completed, if there is no crimping or the crimping is incorrect, water flows out from the gap, thereby achieving the effect of instant discovery.

In the above structure, the number of the O-rings 50 is two, that is, the number of the first recesses 21 is two. By adding the O-ring 50, the sealing performance between the plastic pipe 10 and the pipe 20 is effectively improved.

In the above configuration, the number of the second recesses 22 is plural, and the second recesses are provided on both upper and lower sides of the first recess 21. After the aluminum-plastic pipe 10 and the pipe fitting 20 are crimped, the aluminum-plastic pipe 10 is deformed and filled in the second concave portion 22, that is, the aluminum-plastic pipe 10 is deformed and filled in the second concave portions 22 on the upper side and the lower side of the O-ring 50, respectively, so that the sealing performance between the plastic rising pipe 10 and the pipe fitting 20 is further improved.

The second recess 22 has a trapezoidal cross section and is disposed along the circumferential direction of the pipe 20, so that the aluminum-plastic pipe 10 and the pipe 20 are tightly fitted. The cross-section of the second recess 22 may also be of other shapes, such as circular, triangular or square, etc.

The first recess 21 has a square cross section and is provided along the circumferential direction of the pipe member 20. The cross-section of the first recess 21 may also be of other shapes, such as circular or triangular, etc.

As shown in fig. 1 and 3, the mark points 41 are provided on the outer wall of the stainless steel sleeve 40, and after the stainless steel sleeve 40 is crimped by the jaws, whether the mark points 41 fall on the crimping line 42 is observed, and if so, the crimping is correct.

In the present embodiment, the mark point 41 has a concave shape.

As shown in fig. 1 and 3, the aluminum-plastic pipe 10 includes an outer layer 11, a middle layer 12 and an inner layer 13, the inner layer 13 is located between the outer layer 11 and the middle layer 12, wherein the outer layer 11 and the inner layer 13 are respectively made of plastic material, and the middle layer 12 is made of aluminum material.

In the above structure, the thickness of the inner layer 13 is thicker than the thickness of the outer layer 11 and the middle layer 12, respectively.

Retainer ring 30 may be a plastic material and may be integrally formed with tube 20.

In use, aluminum plastic pipe 10 is inserted into chamber 60 formed between stainless steel sleeve 40 and fitting 20, and then aluminum plastic pipe 10 and fitting 20 are crimped by pressing stainless steel sleeve 40 through the jaws. Then, whether the marked point 41 on the stainless steel sleeve 40 is overlapped with the crimping line 42 or not is observed, and if so, the crimping is correctly completed. In the crimping process, chamfering processing is not needed to be carried out on the cutting port of the aluminum-plastic pipe 10, the working efficiency is effectively improved, and great convenience is brought to an operator.

The above-mentioned embodiments are only used for illustrating the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to limit the scope of the present invention in terms of implementation, which is not limited by the present embodiment, i.e. all equivalent changes or modifications made in accordance with the spirit disclosed by the present invention still fall within the scope of the present invention.

Claims

1. The utility model provides an aluminum-plastic pipe crimping pipe fitting structure, its characterized in that, includes aluminum-plastic pipe, pipe fitting, retaining ring, nonrust steel bushing and O type circle, the retaining ring is located the pipe fitting is outside, nonrust steel bushing cover is established the pipe fitting is outside, and with retaining ring looks butt, nonrust steel bushing with formed between the pipe fitting and being used for aluminum-plastic pipe male cavity, be provided with first concave part, second concave part and step on the outer wall of pipe fitting, set up in the first concave part O type circle, O type circle with the inner wall of aluminum-plastic pipe cooperatees, the second concave part with the aluminum-plastic intraductal wall cooperatees, is used for aluminum-plastic pipe crimping deformation, the step with aluminum-plastic pipe port looks butt, the aluminum-plastic pipe with the level of step butt face, it is less than nonrust steel bushing with the level of retaining ring butt face.

2. The aluminum-plastic pipe crimping fitting construction of claim 1, wherein said fitting outer diameter is greater than said O-ring outer diameter and said aluminum-plastic pipe inner diameter is greater than said fitting outer diameter.

3. The aluminum-plastic pipe crimping fitting structure of claim 1, wherein the number of the O-rings is two.

4. The aluminum-plastic pipe crimping fitting structure of claim 1, wherein the second recess is plural in number and is respectively located at upper and lower sides of the first recess.

5. The aluminum-plastic pipe crimping fitting structure of claim 1, wherein said second recess is trapezoidal in cross section and is disposed along a circumference of said fitting.

6. The aluminum-plastic pipe crimping fitting structure of claim 1, wherein the outer wall of the stainless steel sleeve is provided with marking points.

7. The aluminum-plastic tube crimping fitting structure of claim 6, wherein the marking point is concave.

8. The aluminum-plastic pipe crimping fitting structure of claim 1, wherein the aluminum-plastic pipe comprises an outer layer, a middle layer and an inner layer, the outer layer and the inner layer are respectively of plastic material, and the middle layer is of aluminum material.

9. The aluminum-plastic pipe crimp fitting structure of claim 8, wherein the thickness of the inner layer is greater than the thickness of the outer layer.

10. The aluminum-plastic pipe crimping fitting construction of claim 1, wherein said retainer ring is a plastic material.