WO2018072564A1

WO2018072564A1 - Pipe connection system

Info

Publication number: WO2018072564A1
Application number: PCT/CN2017/100247
Authority: WO
Inventors: 曾广新
Original assignee: 曾广新
Priority date: 2016-10-18
Filing date: 2017-09-01
Publication date: 2018-04-26
Also published as: CN106439283A

Abstract

A pipe connection system, comprising a male pipe connector (1) and a female pipe connector (2). The female pipe connector (2) is internally provided with a stepped bore. The stepped bore divides the female pipe connector into a large diameter bore portion (21) and a small diameter bore portion (24). An end portion of the male pipe connector (1) is connected to the large diameter bore portion (21) of the female pipe connector (2) by insertion. The male pipe connector (1) and the female pipe connector (2) are threadedly connected and sealed by means of a sealing structure. The pipe connection system uses a screw thread and sealing ring (3) structure to enhance the sealing effect of a pipe component. After expanding the bore of the female pipe connector (2), an inner thread and outer thread can be engaged and reinforced using a sealing ring (3) to achieve double sealing of a connected portion. The invention requires no additional technique, shortens operating processes, and improves device quality and production efficiency.

Description

Connecting pipe system

Technical field

The invention relates to the field of hardware building materials, in particular to a connecting pipe system.

Background technique

In general, the connecting pipes in the field of hardware and building materials are connected by means of socket or threaded fitting, but the pipes in the field of building materials are mostly used as water pipes, and the inside thereof passes through liquid semi-liquid materials. The pipe fittings in the prior art are prone to problems such as overflow of tap water due to the gap of the threads. When the pipeline needs to hold large particles or corrosive liquids, the liquid passing through the threads will cause corrosion or rust at the threads.

Summary of the invention

The invention provides a connecting pipe system, which solves the problem that the connecting pipe is easy to leak or the thread is vulnerable to the prior art.

The technical solution of the present invention is implemented as follows:

The connecting pipe system comprises a male pipe and a female pipe, wherein the female pipe is internally provided with a stepped hole, and the stepped hole divides the female pipe into a large aperture portion and a small aperture portion, and the male pipe end is inserted into the Inside the large aperture portion of the female tube, the male tube and the female tube are sealed by a screw connection and a sealing structure, and the sealing structure has a closest distance to the thread A, wherein A>0 .

As a preferred embodiment of the present invention, the male pipe is provided with an external thread on the outer wall, and the outer wall of the male pipe is further provided with N mounting grooves surrounding the cross section of the male pipe, and the mounting groove is an annular closed structure and And disposed at an upper portion or/and a lower portion of the external thread, the female tube is provided with an internal thread corresponding to the external thread, wherein N≥1.

As a preferred embodiment of the present invention, the mounting groove is sleeved with a sealing ring, the sealing ring has a circular cross section, a cross-sectional diameter D1, and the mounting groove depth H1, wherein D1>H1, the sealing ring and the large aperture portion are formed. Interference fit system.

In a preferred embodiment of the present invention, the large aperture portion is obtained by reaming the end portion of the small aperture portion, and the transition between the large aperture portion and the small aperture portion is a circular slope. The transition stage forms an angle a with the large aperture cross section, where 0° ≤ α < 90°.

As a preferred embodiment of the present invention, the male tube and the female tube are one of a PVC tube or a metal tube.

As a preferred embodiment of the present invention, the male tube inner diameter D2, the small aperture portion inner diameter D3, wherein D2 ≥ D3.

As a preferred embodiment of the present invention, the large aperture portion is internally provided with a closed convex ring that cooperates with the sealing ring, and the inner diameter of the convex ring is larger than the outer diameter of the external thread when the male tube and the female tube are completely screwed together. The convex ring abuts the sealing ring to increase the sealing strength.

The transition table is provided with a truncated cone seal. When the male tube and the female tube are tightened, the seal is caught by the male tube port for sealing.

Advantageous Effects of the Invention: The present invention provides a connecting pipe system comprising a male pipe and a female pipe, wherein the female pipe is internally provided with a stepped hole, and the stepped hole divides the female pipe into a large diameter portion and a small diameter hole The male tube end is inserted into the large aperture portion of the female tube, and the male tube and the female tube are sealed by a screw connection and a sealing structure. The sealing effect of the pipe is better by the structure of the thread and the sealing ring. After the female pipe is reamed, the inner and outer threads are matched, and the sealing ring is reinforced, so that the connecting portion achieves the double sealing effect, and does not need Other redundant processes, while reducing the production process and improving production efficiency, did not reduce the quality of the workpiece, but greatly enhanced the quality of the pipe.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any inventive labor.

1 is a schematic structural view of a first embodiment of the present invention;

2 is a schematic structural view of a male head pipe of Embodiment 1;

3 is a schematic structural view of a female tube of Embodiment 1;

4 is a schematic structural view of a connecting pipe of Embodiment 2;

Figure 5 is a schematic structural view of a sealing member in Embodiment 3;

Figure 6 is a structural view showing the structure of the sealing member in the third embodiment.

In the drawing, the male pipe 1, the mounting groove 11, the external thread 12, the female pipe 2, the large-aperture portion 21, the internal thread 22, the transition table 23, the small-aperture portion 24, the seal ring 3, and the seal member 4.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

Example 1

The connecting pipe system shown in FIG. 1 has a male pipe 1 and a female pipe 2, and the female pipe 2 is internally provided with a stepped hole, and the stepped hole divides the female pipe into a large aperture portion 21 and a small aperture portion 24, The end of the head pipe 1 is inserted into the inside of the large-aperture portion 21 of the female pipe 2.

As shown in FIG. 2, the outer wall of the male pipe 1 is provided with an external thread 12, and the external thread 12 is disposed at the top end of the male pipe. The outer wall of the male pipe 1 is further provided with two mounting grooves 11 surrounding the cross section of the male pipe 1. The mounting groove 11 has a rectangular cross section, and the mounting groove 11 is an annular closed structure and is disposed at a lower portion of the external thread 12. As shown in FIG. 3, the female tube 2 is provided with an internal thread 22 corresponding to the external thread 12 at a corresponding position.

The sealing groove 3 is sleeved on the mounting groove 11, and the sealing ring 3 has a circular cross section with a cross-sectional diameter D1 and a mounting groove 11 depth H1, wherein D1>H1, and the sealing ring 3 forms an interference fit system with the large-diameter portion 21.

The large aperture portion 21 is obtained by reaming the end portion of the small aperture portion 24, and a transition table 23 is formed between the large aperture portion 21 and the small aperture portion 24, the transition stage 23 is an annular slope surface, and the transition stage 23 and the large aperture portion are formed. The cross section of 22 forms an angle a, where a = 45°.

The male pipe 1 and the female pipe 2 are PVC pipes.

The inner diameter D2 of the male pipe 1 and the inner diameter D3 of the small diameter portion 24, where D2 ≥ D3.

The large aperture portion 21 is internally provided with a closed convex ring that cooperates with the sealing ring 3. The inner diameter of the convex ring is larger than the outer diameter of the external thread 12. When the male tube 1 and the female tube 2 are completely screwed, the convex ring and the sealing ring 3 are Adhere to increase the seal strength.

Example 2

The connecting pipe system shown in FIG. 4 has a male pipe 1 and a female pipe 2, and the female pipe 2 is internally provided with a stepped hole, and the stepped hole divides the female pipe into a large aperture portion 21 and a small aperture portion 24, The end of the head pipe 1 can be inserted into the inside of the large-pore portion 21 of the female pipe 2. The connection between the male pipe 1 and the female pipe 2 is the same as that in the first embodiment.

The outer wall of the male pipe 1 is provided with an external thread 12, and the external thread 12 is disposed on the upper portion of the male pipe. The outer wall of the male pipe 1 is further provided with four mounting grooves 11 surrounding the section of the male pipe 1, wherein the installation groove has a cross section of Rectangularly, the mounting groove 11 is an annular closed structure, and the two are respectively disposed at upper and lower portions of the external thread 12, and the female tube 2 is provided with an internal thread 22 matched with the external thread 12 at a corresponding position.

The sealing groove 3 is sleeved on the mounting groove 11, and the sealing ring 3 has a triangular cross section with a section height D1 and a mounting groove 11 depth H1, wherein D1>H1, and the sealing ring 3 forms an interference fit system with the large aperture portion 21. The diameter of the circular outer edge of the sealing ring of the socket is smaller than the diameter of the outer wall of the large diameter of the female tube.

The large aperture portion 21 is obtained by reaming the end portion of the small aperture portion 24, and a transition table 23 is formed between the large aperture portion 21 and the small aperture portion 24, the transition stage 23 is an annular slope surface, and the transition stage 23 and the large aperture portion are formed. The 22 cross section forms an angle α, where α = 30°.

The male pipe 1 and the female pipe 2 are stainless steel pipes or other metal pipes.

The large aperture portion 21 is internally provided with a closed convex ring that cooperates with the sealing ring 3. The inner diameter of the convex ring is larger than the outer diameter of the external thread 12. When the male tube 1 and the female tube 2 are completely screwed, the convex ring and the sealing ring 3 are Adhere to increase the seal strength. The water pipe size conforms to national standards.

Example 3

As shown in FIG. 5 or 6, the connecting pipe system in Embodiment 1 is preferably provided with a truncated cone-shaped sealing member 4 in the transition table 23, and the sealing member when the male pipe (1) and the female pipe (2) are tightened 4 The port of the male tube (1) is stuck, and the distance between the truncated cone seal 4 and the internal thread 22 and the external thread 12 is greater than zero. It is obvious that the structure of the sealing member 4 is also applicable to the embodiment 2.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., which are included in the spirit and scope of the present invention, should be included in the present invention. Within the scope of protection.

Claims

The connecting pipe system comprises a male pipe (1) and a female pipe (2), wherein the female pipe (2) is internally provided with a stepped hole, and the stepped hole divides the female pipe into a large diameter portion (21) And a small aperture portion (24), the end of the male tube (1) is inserted into the large aperture portion (21) of the female tube (2), the male tube (1) and the The female tubes (2) are screwed together and sealed by a sealing structure having a closest distance to the threads of A, where A >
The connecting pipe system according to claim 1, characterized in that the outer wall of the male pipe (1) is provided with an external thread (12), and the outer wall of the male pipe (1) is further provided with N surrounding a mounting groove (11) of a cross section of the male pipe (1), the mounting groove (11) is an annular closed structure and is disposed at an upper portion or/and a lower portion of the external thread (12), the female pipe (2) The corresponding position is provided with an internal thread (22) that cooperates with the external thread (12), where N ≥ 1.
The connecting pipe system according to claim 2, wherein the mounting groove (11) is sleeved with a sealing ring (3), the sealing ring (3) having a circular or triangular cross section and a cross-sectional diameter D1 The mounting groove (11) has a depth of H1, wherein D1>H1, and the sealing ring (3) forms an interference fit system with the large aperture portion (21).
The connecting pipe system according to claim 1, wherein the large-aperture portion (21) is obtained by reaming an end portion of the small-aperture portion (24), the large-aperture portion (21) and a small aperture Between the portions (24) is a transition table (23) which is an annular slope which forms an angle α with the cross section of the large aperture portion (22), wherein 0° ≤ α < 90°.
The connecting pipe system according to claim 1, characterized in that the male pipe (1) and the female pipe (2) are one of a PVC pipe or a metal pipe.
The connector system according to claim 1, wherein said male tube has an inner diameter D2 and said small aperture portion has an inner diameter D3, wherein D2 ≥ D3.
The connecting pipe system according to claim 3, wherein the large-diameter portion (21) is internally provided with a closed convex ring that cooperates with the sealing ring (3), and the inner diameter of the convex ring is larger than the external thread The outer diameter of (12), when the male tube (1) and the female tube (2) are completely screwed together, the convex ring abuts against the sealing ring (3) to increase the sealing strength.
The connecting pipe system according to claim 4, characterized in that the transition table (23) is provided with a truncated cone-shaped sealing member (4), and the male pipe (1) and the female pipe (2) are sealed when they are tightened. Piece (4) jams the male tube (1) port for sealing.