CN216520083U

CN216520083U - High-pressure joint

Info

Publication number: CN216520083U
Application number: CN202123359923.0U
Authority: CN
Inventors: 黄波; 蒋兴文; 孙江龙; 刘杰; 王磊; 曾学兵; 唐浩倬; 罗存益; 张萍萍; 马鲁宁
Original assignee: Chengdu Anderson Measurement Co ltd
Current assignee: Chengdu Anderson Measurement Co ltd
Priority date: 2021-12-28
Filing date: 2021-12-28
Publication date: 2022-05-13
Anticipated expiration: 2031-12-28

Abstract

The utility model relates to the technical field of joints, and provides a high-pressure joint which is used for connecting a pipeline with an external joint and comprises a compression screw plug, a clamping nut and at least one compression part arranged at one end of the clamping nut, wherein the compression screw plug is provided with a first through passage, and the inner wall of the first through passage is provided with an annular first locking surface; the tightening nut is provided with a second through channel and is sleeved in the first through channel in a sliding manner; the pressing part is connected to one end of the clamping nut, and the other end of the pressing part is provided with a second locking surface matched with the first locking surface; when the pressing screw plug moves towards the outer joint along the axial direction of the pipeline, the first locking surface slides relative to the second locking surface, so that the pressing part presses the pipeline. According to the utility model, the pressing part is additionally arranged at one end of the fastening nut, and the pipeline is pressed in the radial direction through the pressing part, so that the stability of the pipeline in the actual use process is improved.

Description

High-pressure joint

Technical Field

The utility model relates to the technical field of joints, in particular to a high-pressure joint.

Background

High pressure fittings are commonly used in conventional pipe coupling systems to connect pipes to external fittings. The existing high-pressure joint comprises a compression screw plug, a clamping nut and other structures, the structure of the high-pressure joint in practical use is shown in figure 1, a pipeline sequentially penetrates through the compression screw plug and the clamping nut and then forms a conical sealing surface with an external joint, the clamping nut is in threaded connection with the pipeline, and the pipeline is connected with the external joint by connecting the external joint with the compression screw plug through threads.

However, in practical applications, there is not only a gap between the clamping nut and the external joint, but also a gap between the compression plug and the pipe, which easily causes premature failure of the tapered sealing surface formed between the pipe and the external joint when vibration is generated in the pipe.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a high-pressure joint, which is used for solving the technical problem that a conical sealing surface formed between a pipeline and an external joint is easy to fail early when the pipeline in the prior art shakes.

The embodiment of the utility model is realized by the following technical scheme:

a high-pressure fitting for connecting a pipe to an external fitting, comprising:

the pressing screw plug is provided with a first through channel along the axial direction of the pressing screw plug, the inner wall of the first through channel is provided with an annular first locking surface, the diameter of the first locking surface is smaller than the inner diameter of the first through channel, and the pressing screw plug is connected with the external joint;

the tightening nut is provided with a second through channel along the axial direction of the tightening nut, the tightening nut is sleeved in the first through channel in a sliding manner, the pipeline is arranged in the second through channel in a penetrating manner, and the tightening nut is connected with the pipeline; and the number of the first and second groups,

the pressing part is connected to one end of the clamping nut, and a second locking surface matched with the first locking surface is arranged at the other end of the pressing part;

wherein when the compression screw plug moves toward the external joint in an axial direction of the pipe, the first locking surface slides relative to the second locking surface so that the compression portion compresses the pipe.

Optionally, the first locking surface and the second locking surface are both inclined surfaces.

Further, along the axial direction of the pipeline and the direction far away from the external joint, the inclined plane gradually approaches the pipeline.

Optionally, the compression part and the clamping nut are integrally formed.

Optionally, the outer wall of the compression plug screw is provided with an annular boss, and the annular boss and the compression plug screw are integrally formed.

Optionally, a tapered sealing surface is provided between the pipe and the external fitting.

Optionally, the number of the pressing portions is multiple, and the pressing portions are sequentially distributed along the circumferential direction of the fastening nut.

Further, the number of the pressing parts is more than or equal to four.

Further, the distance between two adjacent pressing parts is equal.

Optionally, the outer wall of the compression plug screw is provided with an external thread.

The technical scheme of the embodiment of the utility model at least has the following advantages and beneficial effects:

the high-pressure joint is reasonable in design and simple in structure, the compression part is additionally arranged at one end of the clamping nut, when the compression screw plug is in threaded connection with the external joint, the first locking surface arranged inside the compression screw plug can slide relative to the second locking surface arranged on the compression part, and the compression part is compressed and elastically deformed to continuously form clamping acting force on the pipeline, so that the pipeline is clamped by the compression part from the radial direction, the stability of the pipeline in the actual use process is improved, and the problem that a conical sealing surface formed between the pipeline and the external joint fails too early is avoided.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a conventional high-pressure joint according to an embodiment of the present invention in use;

fig. 2 is a schematic structural diagram of a compression plug according to an embodiment of the present invention;

FIG. 3 is a schematic structural view of a clinch nut and clinch portion provided by an embodiment of the present invention;

FIG. 4 is a schematic structural view of a compression plug and a jam nut as assembled according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a high-pressure joint according to an embodiment of the present invention during use.

Icon: 1-a compression screw plug, 101-a first through channel, 102-a first locking surface, 103-an annular boss, 2-a parallel-fastening nut, 201-a second through channel, 3-a compression part, 301-a second locking surface, 10-a pipeline, 20-an external joint and an S-conical sealing surface.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that if the terms "left", "right", "inside", "outside", etc. indicate an orientation or positional relationship based on that shown in the drawings or that a product of this application is usually placed in use, this is only for convenience of description and simplicity of description, and does not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be mechanically coupled, directly coupled, indirectly coupled through intervening media, or may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Examples

The present embodiment provides a high pressure fitting for connecting a pipe 10 with an external fitting 20. The high-pressure connector comprises a compression screw plug 1 and a clamping nut 2.

Referring to fig. 2, a first through channel 101 is disposed in the compression screw plug 1 along the axial direction, and the first through channel 101 penetrates through the compression screw plug 1. An annular first locking surface 102 may be provided on an inner wall of one end of the first through-passage 101 in a circumferential direction of the compression screw 1, such that a diameter of the first locking surface 102 is smaller than an inner diameter of the first through-passage 101.

By way of example, the first locking surface 102 can be designed as a bevel. The inclined surface gradually approaches the pipe 10 in a direction away from the outer joint 20 in the axial direction of the pipe 10, that is, when the side of the inclined surface away from the outer joint 20 is inclined to the left to approach the pipe 10. The structure of the first fastening surface 102 is not particularly limited in this application.

It will be appreciated that the first locking surface 102 may be arranged inside the first through passage 101 on a side remote from the tightening nut 2; meanwhile, an external thread can be arranged on the outer wall of the compression plug screw 1, so that the compression plug screw 1 is in threaded connection with the external connector 20, and the compression plug screw 1 is convenient to assemble.

Meanwhile, in order to facilitate the rotation of the compression plug screw 1 when the compression plug screw 1 is connected with the external connector 20, the outer wall of the compression plug screw 1 is further provided with an annular boss 103, and the annular boss 103 and the compression plug screw 1 are integrally formed, so that the structural integrity of the compression plug screw 1 is ensured, and the structural stability of the compression plug screw 1 is improved.

Referring to fig. 3, a second through passage 201 is formed in the interior of the clamping nut 2 along the axial direction thereof, and the second through passage 201 penetrates through the clamping nut 2. Meanwhile, the jam nut 2 is sleeved in the first through passage 101 in a sliding manner, so that a sliding fit structure is formed between the jam nut 2 and the compression screw plug 1, the pipeline 10 is arranged in the second through passage 201 in a penetrating manner, and the inner wall of the second through passage 201 is provided with an internal thread, so that the jam nut 2 is connected with the pipeline 10 in a threaded manner.

To improve the vibration resistance of the pipe 10, with continued reference to fig. 3, a compression part 3 may be provided at an end surface of one end of the jam nut 2. The compressing portion 3 extends along the axial direction of the clamping nut 2, one end of the compressing portion 3 is connected with the clamping nut 2, and the other end of the compressing portion 3 is provided with a second locking surface 301 matched with the first locking surface 102.

As an example, the second locking surface 301 may also be provided as a bevel adapted to the first locking surface 102. Likewise, the inclined surface gradually approaches the pipe 10 in the axial direction of the pipe 10 and in the direction away from the outer joint 20. The structure of the second locking surface 301 is not specifically limited in this application.

Wherein, the compressing parts 3 can be set to four, and the four compressing parts 3 are distributed along the circumference of the parallel nut 2 in sequence, and the distance between two adjacent compressing parts 3 is equal. Of course, when there is only one pressing portion 3, the pressing portion 3 can also be engaged with the press plug 1 to clamp the pipe 10. However, when the number of the pressing portions 3 is four, the pipe 10 can be pressed from four directions, and since the distance between two adjacent pressing portions 3 is equal, the force of the pressing portions 3 acting on the pipe 10 is more uniform. Of course, the number of the pressing portions 3 may be reasonably selected as needed in specific implementation, and the specific number of the pressing portions 3 is not particularly limited in the present application.

Referring to fig. 4, in the assembled state, the first locking surface 102 contacts the second locking surface 301, and a portion of the outer wall of the pressing portion 3 contacts the inner wall of the first through-channel 101, so that the overall structure of the high-pressure connector is more compact. Simultaneously, be integrated into one piece structure between above-mentioned compressing tightly portion 3 and the lock nut 2 to guarantee the integrality of lock nut 2 structure, in order to improve the stability of lock nut 2 structure.

In order to more clearly understand the operation principle of the high-pressure connector provided by the present embodiment, the following will further describe the high-pressure connector in conjunction with the method for using the high-pressure connector.

Referring to fig. 5, when the high pressure connector is actually used, a pipe 10 passes through a compression screw plug 1 and a fastening nut 2 in sequence. And simultaneously, the clamping nut 2 is screwed on the outer wall of the pipeline 10 to limit the compression screw plug 1. After the union nut 2 is assembled, the compression screw plug 1 is moved towards the external joint 20, so that the compression screw plug 1 is in threaded connection with the external joint 20, the compression part 3 arranged at the end part of the union nut 2 extends into the first through passage 101, and at the moment, the second locking surface 301 of the compression part 3 is in contact with the first locking surface 102 in the first through passage 101.

With the continuous rotation of the compression screw plug 1, the compression screw plug 1 pushes and tightens the nut 2 through the thread, so that the pipeline 10 and the interior of the external joint 20 form a conical sealing surface S. Meanwhile, the pressing screw plug 1 moves towards the external joint 20 along the axial direction of the pipeline 10, the first locking surface 102 arranged on the inner wall of the first through channel 101 can slide relative to the second locking surface 301 arranged on the pressing part 3, at this time, the pressing part 3 is pressed and elastically deforms to continuously form clamping acting force on the pipeline 10, so that the function of pressing the pipeline 10 by using the pressing part 3 is realized, at this time, the pipeline 10 is clamped under the combined action of the pressing parts 3, and the stability of the pipeline 10 is improved.

It can be seen that the high-pressure joint provided by the present embodiment causes the pressing portion 3 to press the pipe 10 from the radial direction by adding the pressing portion 3 to one end of the jam nut 2 and by the first locking surface 102 provided inside the jam screw 1. In contrast to the prior art, the line 10 is no longer fixed solely to the external connection 20 by means of the compression screw 1 and the union nut 2. On the basis of this, the arrangement of the pressing part 3 causes the high-pressure connector to form a clamping force at a position far away from the external connector 20. When the pipe 10 vibrates, the clamping action force of the pressing part 3 can obstruct the vibration from being transmitted to the conical sealing surface S formed between the pipe 10 and the external joint 20, so as to improve the stability of the pipe 10 in the actual use process, and therefore, the problem that the conical sealing surface S formed between the pipe 10 and the external joint 20 fails prematurely is avoided.

It should be noted that, the specific structure type of the first locking surface 102 and the second locking surface 301 is not limited herein, as long as it is achieved that when the compression screw plug 1 is screwed with the external joint 20, the first locking surface 102 can slide relative to the second locking surface 301 and apply a certain pressure to the second locking surface 301, so as to elastically deform the compression portion 3, for example, the structure of the first locking surface 102 and the second locking surface 301 may also be an inclined surface, an arc surface, a vertical surface, or the like.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-pressure fitting for connecting a pipe to an external fitting, comprising:

2. The high-pressure fitting according to claim 1, wherein the first locking surface and the second locking surface are both beveled.

3. The high-pressure fitting according to claim 2, wherein the chamfer is progressively closer to the conduit in a direction axially of the conduit and away from the external fitting.

4. The high-pressure connector according to claim 1, wherein the compression portion is integrally formed with the clinch nut.

5. The high-pressure connector according to claim 1, wherein the outer wall of the compression plug is provided with an annular boss, and the annular boss is integrally formed with the compression plug.

6. The high-pressure fitting according to claim 1, wherein a tapered sealing surface is provided between the conduit and the external fitting.

7. The high-pressure joint as claimed in claim 1, wherein the number of the compression parts is plural, and the plurality of the compression parts are sequentially distributed along a circumferential direction of the union nut.

8. The high-pressure joint as claimed in claim 7, wherein the number of the compression parts is four or more.

9. The high-pressure joint as claimed in claim 8, wherein the distance between adjacent two of the compression portions is equal.

10. The high pressure fitting according to claim 1, wherein an outer wall of the compression plug is externally threaded.