CN215371454U

CN215371454U - Screwed joint and pipeline connecting structure

Info

Publication number: CN215371454U
Application number: CN202121180863.3U
Authority: CN
Inventors: 陈建
Original assignee: Guangdong Sihao Fluid Technology Co ltd
Current assignee: Guangdong Sihao Fluid Technology Co ltd
Priority date: 2021-05-30
Filing date: 2021-05-30
Publication date: 2021-12-31
Anticipated expiration: 2031-05-30

Abstract

The utility model discloses a screwed joint, aiming at being capable of butting pipelines with different pipe diameters, and having small processing difficulty and low production cost, and the technical scheme is as follows: the utility model discloses a threaded joint, which comprises a first connecting pipe and a second connecting pipe, wherein the first connecting pipe is sequentially divided into a threaded section, a clamping section, a small-diameter section, an annular inclined plane section and a large-diameter section, the large-diameter section is welded and communicated with the second connecting pipe, the outer diameter of the large-diameter section is the same as that of the second connecting pipe, and the small-diameter section, the annular inclined plane section and the large-diameter section are of an integrally formed structure.

Description

Screwed joint and pipeline connecting structure

Technical Field

The utility model belongs to the technical field of fluid pipeline connection, and particularly relates to a threaded joint and a pipeline connection structure.

Background

In the connection of fluid pipeline, can use screwed joint to dock two pipelines, most screwed joints all dock the same pipe diameter, can't dock the pipeline of different pipe diameters, and in pipe-line system, because the influence of various factors can be provided with the pipeline of different pipe diameters, present screwed joint can't satisfy operation requirement at this moment.

In view of the above situation, CN201844135U discloses a pipe reducer union, which includes a small diameter section, a variable diameter section and a large diameter section, wherein the variable diameter section is a tapered pipe, and the inner conical surface angle of the tapered pipe is ten to thirty degrees; the angle of the reducing outer conical surface is ten to thirty degrees; the small-diameter section is connected with the inner side of the variable-diameter section through an inward convex arc conical surface; the inner sides of the variable-diameter section and the large-diameter section are connected through an inwards concave arc conical surface; the outer side of the small-diameter section is provided with an external thread; the outer side of the large-diameter section is provided with external threads or internal threads. The turbulence and flow resistance are small, and the strength is good.

The pipe reducer union has the problems that the pipe reducer union needs to be designed and processed according to the pipe diameter of a butted pipeline, the manufacturing process is complex, and the production cost is high.

Therefore, the technical problems to be solved by the application are as follows: how to provide a reducing threaded joint which is convenient to machine.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a threaded joint, which aims to be capable of butting pipelines with different pipe diameters, and is small in processing difficulty and low in production cost.

According to a first aspect of the present invention, there is provided a threaded joint, including a first connection pipe and a second connection pipe, the first connection pipe is sequentially divided into a threaded section, a clamping section, a small diameter section, an annular inclined plane section, and a large diameter section, the large diameter section is welded and communicated with the second connection pipe, an outer diameter of the large diameter section is the same as an outer diameter of the second connection pipe, and the small diameter section, the annular inclined plane section, and the large diameter section are of an integrally formed structure.

In a specific embodiment of the present invention, the small diameter section, the annular inclined surface section and the large diameter section are integrally formed by an internal high pressure forming process.

In a particular embodiment of the utility model, the outer contour of the cross-section of the clamping section is hexagonal.

In a particular embodiment of the utility model, the second connection pipe is provided with an annular flange for snap-fitting with an external pipe joint.

In a specific embodiment of the present invention, the first connecting tube and the second connecting tube are made of stainless steel.

Meanwhile, the utility model also discloses a pipeline connecting structure which comprises a threaded joint and a pipe joint, wherein one end of the threaded joint is hermetically connected with the pipe joint, the threaded joint is the threaded joint, the second connecting pipe is inserted into the pipe joint and is hermetically connected with the pipe joint, the threaded section is used for connecting an external small-diameter pipeline, and one end of the pipe joint, which is far away from the second connecting pipe, is used for connecting an external large-diameter pipeline.

In a specific embodiment of the utility model, the pipe joint comprises two shells, a cavity with two open ends is arranged on the inner side of each shell, the cavity comprises first semi-annular grooves at two ends, the corresponding first semi-annular grooves on the two shells form a first annular groove, and an annular flange is arranged on the second connecting pipe and clamped in the first annular groove.

In a specific embodiment of the utility model, the concave cavity comprises a second semi-annular groove located in the middle, the corresponding second semi-annular grooves on the two shells form a second annular groove, a sealing ring is arranged in the second annular groove, and the second connecting pipe and the external large-diameter pipeline are inserted into the sealing ring and are in sealing connection with the sealing ring.

One of the above technical solutions of the present invention has at least one of the following advantages or beneficial effects:

according to the utility model, the second connecting pipe with the proper pipe diameter can be selected according to actual conditions, then the first connecting pipe is simply processed, only one end of the first connecting pipe, which is far away from the thread section, is required to be enlarged to form a large-diameter section, and then the large-diameter section is welded and communicated with the second connecting pipe, so that the diameter change can be realized, the flexibility is strong, the processing difficulty is small, integral casting is not required, and the production cost is reduced.

Drawings

The utility model is further described below with reference to the accompanying drawings and examples;

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

FIG. 2 is a schematic structural view of embodiment 2 of the present invention;

fig. 3 is a sectional view a-a of fig. 2 of embodiment 2 of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the term "connected" is to be interpreted broadly, and may be, for example, a fixed connection or a movable connection, a detachable connection or a non-detachable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or may be connected through one or more other elements or indirectly connected through one or more other elements or in an interactive relationship between two elements.

The following disclosure provides many different embodiments, or examples, for implementing different aspects of the utility model.

Example 1

Referring to fig. 1, in one embodiment of the present invention, a threaded joint includes a first connecting pipe 1 and a second connecting pipe 2, the first connecting pipe 1 is divided into a threaded section 11, a clamping section 12, a small-diameter section 13, an annular inclined section 14 and a large-diameter section 15 in sequence, the large-diameter section 15 is welded and communicated with the second connecting pipe 2, an outer diameter of the large-diameter section 15 is the same as an outer diameter of the second connecting pipe 2, and the small-diameter section 13, the annular inclined section 14 and the large-diameter section 15 are of an integrally formed structure;

can select the second connecting pipe 2 of suitable pipe diameter according to actual conditions, then carry out simple processing with first connecting pipe 1, only need to expand the one end of first connecting pipe 1 keeping away from screw thread section 11 and make it appear big footpath section 15, then with big footpath section 15 and the welding intercommunication of second connecting pipe 2, alright in order to realize the reducing, the flexibility is strong, the processing degree of difficulty is little, need not whole casting, has reduced manufacturing cost.

It should be noted that the threaded section 11 may be an internal thread or an external thread, and is set according to actual matching conditions.

Preferably, the small diameter section 13, the annular inclined plane section 14 and the large diameter section 15 are integrally formed through an internal high pressure forming process, the first connecting pipe 1 can be a common threaded joint, then the internal high pressure forming process is adopted for processing, the small diameter section 13 is expanded to form the large diameter section 15, and the annular inclined plane section 14 is formed between the small diameter section 13 and the large diameter section 15; compared with the common stamping process, the internal high-pressure forming process has better forming effect, is not easy to crack and has higher qualification rate.

Preferably, the outer contour of the cross section of the clamping section 12 is hexagonal, so that a tool such as a wrench can be conveniently used for clamping, and then the threaded joint can be screwed down.

In one embodiment of the utility model, the second connecting pipe 2 is provided with an annular flange 21 for clamping the external pipe joint, and when the second connecting pipe 2 is connected with the external pipeline through the external pipe joint, the annular flange 21 can be clamped into the external pipe joint to prevent the external pipe joint from moving axially; the annular flange 21 may also be formed by an internal high pressure forming process.

In this embodiment, the first connecting pipe 1 and the second connecting pipe 2 are made of stainless steel, and both the corrosion resistance and the welding performance are good.

Example 2

Referring to fig. 1 to 3, a pipeline connecting structure includes a threaded joint and a pipe joint 3, one end of the threaded joint is hermetically connected to the pipe joint 3, the threaded joint is as described in embodiment 1, the second connecting pipe 2 is inserted into the pipe joint 3 and hermetically connected to the pipe joint 3, the threaded section 11 is used for connecting an external small-diameter pipeline, one end of the pipe joint 3, which is far away from the second connecting pipe 2, is used for connecting an external large-diameter pipeline, so that connection of pipelines with different pipe diameters is facilitated, the second connecting pipe 2 does not need to be directly fixed to the external large-diameter pipeline, and the installation difficulty is reduced.

When the pipeline connecting structure is adopted, the threaded connector is fixed to an external small-diameter pipeline by using the threaded section 11, and then the pipe connector 3 is used for butt joint of the second connecting pipe 2 and the external large-diameter pipeline, so that the pipelines with different pipe diameters are connected.

Specifically, the pipe joint 3 includes two housings 31, a cavity 32 with two open ends is provided on the inner side of the housing 31, the cavity 32 includes first semi-annular grooves 321 located at two ends, the two corresponding first semi-annular grooves 321 on the housings 31 form first annular grooves, an annular flange 21 is provided on the second connecting pipe 2, the annular flange 21 is clamped in the first annular groove, so that the pipe joint 3 cannot move axially, and the external large-diameter pipeline may also have the same design for clamping another first annular groove of the pipe joint 3.

Preferably, the cavity 32 includes a second semi-annular groove 322 located in the middle, two corresponding second semi-annular grooves 322 on the casing 31 constitute a second annular groove, a sealing ring 33 is arranged in the second annular groove, and the second connecting pipe 2 and the external large-diameter pipeline are inserted into the sealing ring 33 and are in sealing connection with the sealing ring 33, so as to seal the pipeline.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. The utility model provides a screwed joint, its characterized in that includes first connecting pipe and second connecting pipe, first connecting pipe divide into screw thread section, centre gripping section, path section, annular inclined plane section and big footpath section in proper order, big footpath section and second connecting pipe welding intercommunication, the external diameter of big footpath section is the same with the external diameter of second connecting pipe, path section, annular inclined plane section and big footpath section are the integrated into one piece structure.

2. The threaded joint of claim 1, wherein the small diameter section, the annular chamfer section, and the large diameter section are integrally formed by an internal high pressure forming process.

3. The threaded joint of claim 1, wherein the outer profile of the cross-section of the gripping section is hexagonal.

4. The threaded joint of claim 1, wherein the second connector tube has an annular flange for snap-fitting to a peripheral tube connector.

5. The threaded joint of claim 1, wherein the first and second connecting pipes are both stainless steel.

6. A pipe connection structure, comprising a threaded joint and a pipe joint, wherein one end of the threaded joint is hermetically connected with the pipe joint, the threaded joint is as claimed in any one of claims 1 to 5, the second connecting pipe is inserted into the pipe joint to be hermetically connected with the pipe joint, the threaded section is used for connecting an external small-diameter pipe, and one end of the pipe joint, which is far away from the second connecting pipe, is used for connecting an external large-diameter pipe.

7. The pipe connection structure according to claim 6, wherein the pipe joint comprises two shells, the inner side of the shell is provided with a cavity with two open ends, the cavity comprises first semi-annular grooves at two ends, the first semi-annular grooves on the two shells form a first annular groove, the second connection pipe is provided with an annular flange, and the annular flange is clamped in the first annular groove.

8. The pipe connection structure according to claim 7, wherein the cavity includes a second semi-annular groove located in the middle, the second semi-annular grooves on the two shells form a second annular groove, a sealing ring is disposed in the second annular groove, and the second connection pipe and the external large-diameter pipe are inserted into the sealing ring and are in sealed connection with the sealing ring.