CN111998149A - A pressure pipeline connection and sealing device for conveying fluid - Google Patents

Abstract

The invention is a pressure pipeline connection and sealing device for conveying fluids; the two butt joints are connected by components such as a pipe sleeve, a docking key, a pressure-responsive seal, a guide bush, a key, a clamping sleeve, and a clamping sleeve limiting device. The head is machined with grooved seamless pipe for radial connection while sealing the pipe to prevent fluid leakage. This structure can withstand high pressure and can be used for pipeline connection of various pipe diameters. It is easy to install and connect, and it is convenient to replace the seal. Especially for some rigidly connected long-distance liquid supply pipelines, it has a safe and reliable seal and is not easy to be damaged, which is convenient for production, processing and processing. The connecting groove does not damage the compressive strength of the pipeline and does not reduce the inner diameter of the pipeline.

Description

A pressure pipeline connection and sealing device for conveying fluid

technical field

The present invention relates to the field of fluid transportation, in particular to a fluid transportation pipeline.

Background technique

The connection methods of the existing fluid transmission pipelines are as follows: 1. Threaded connection: mainly used for low-pressure pipelines. 2. Flange connection: The volume is large, the flange needs to be welded at the pipe head, the assembly operation is complicated, and the pressure resistance is low. 3. Socket connection: It is necessary to connect the pipes to the plug and seal. If it is a rigid pipe to plug, it is not suitable to replace the seal. At the same time, the pipe head needs to be processed to the socket. 4. Clamp groove connection: clamp parts are required, and the clamp is a split clamp, which requires high processing accuracy of the clamp; the pipe head needs to be grooved. If the groove is processed by pressing, it will affect the internal communication of the pipe. Diameter; if a car-made groove is used, the wall thickness of the pipe will be affected, the pressure resistance of the pipe will be weakened, and the installation requirements will be high, the seal will be easily damaged or the seal position will leak. 5. Card sleeve type connector: firm connection, high pressure resistance and good sealing performance, but can only be used for small-diameter pipes, not for large-diameter pipes.

None of the existing connection methods of these fluid pipelines can achieve not only easy installation, replacement and maintenance, but also the connection of various pressure grade seals and various pipe diameters.

SUMMARY OF THE INVENTION

A new type of pipe connection device was invented. This device is composed of seamless pipes with grooves on the head, pipe sleeves, butt-jointing keys, pressure-responsive seals, guide bushings, clamps for pipe sleeve limiting, ferrules, ferrule limiting devices and other components. This structure can withstand high pressure and can be used for pipe connection of various pipe diameters. It is easy to install and connect, and it is convenient to replace the seal. Especially for some rigidly connected long-distance liquid supply pipelines, the sealing is reliable and not easy to be damaged, and the processing is convenient. The connecting groove does not damage the compressive strength of the pipeline and does not reduce the inner diameter of the pipeline.

Description of drawings

In order to illustrate the specific embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

FIG. 1 is a schematic diagram of the overall structure of the present invention.

Fig. 2 is a schematic diagram of a connecting pipe of the present invention, and a schematic diagram of processing a connecting groove and a sealing groove at both ends.

Figure 3 is a schematic diagram of the tube sleeve.

FIG. 4 is a schematic diagram of a docking card key.

Reference number description.

1-seamless pipe with grooves on the head; 2-pipe sleeve; 3-butt key; 4-liner belt; 5-pressure responsive seal; 6-guide bushing; 7-key; 8-card sleeve ;9-Card sleeve limit device

Detailed ways

The present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are a part of the embodiments of the present invention, not all of the embodiments, and other embodiments obtained by those of ordinary skill in the art without creative work all belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "center", "left", "right", "horizontal", "inner", "outer", etc. are based on those shown in the accompanying drawings The orientation or positional relationship is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the indicated device or original must have a characteristic orientation and operate in a specific orientation configuration, so it should not be construed as a limitation of the present invention. Furthermore, the terms "first", "second", and "third" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In the description of the present invention, it should be noted that the terms "installed", "connected" and "limited" should be interpreted in a broad sense unless otherwise expressly specified and limited. For example, it can be a fixed connection, a detachable connection, or other connections in the same body; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal connection of the two original parts; the limit can be a limit block The limit can also be a set screw limit, or a spring clip key limit. The card key limit can use the card sleeve or other limit methods such as throat hoop strapping. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

Example

The present invention provides a fluid pipeline connection method. Referring to FIG. 1 , in this embodiment, a docking key (3) is used to connect two seamless pipes (1) with grooves on their heads to limit the two pipes. Movement in the left and right directions. The movement of the front and rear up and down positions of the two seamless pipes (1) with grooves on their heads and the butt-jointing key (3) is restricted by the pipe sleeve (2). The seamless pipe (1) with grooves on the head is equipped with a pressure-responsive seal (5) and the pipe sleeve (2) works together to ensure that the fluid inside the sealed pipe does not seep out; the seamless pipe with grooves on the head ( 1) A guide bush (6) is installed to limit the gap between the pipe sleeve (2) and the seamless pipe (1) with grooves on the head, so as to reduce the bending moment or bias at the connection position due to excessive clearance The pressure-responsive sealing (5) phenomenon also plays a guiding role during installation and reduces the gap between the pipe sleeve (2) and the seamless pipe (1) whose head is machined with grooves. The limit on the left and right of the pipe sleeve is realized by the card key (7). Of course, other methods such as set screws can also be used to limit the position. The limit of the card key (7) is realized by the card sleeve (8), so as to ensure that the card key (7) will not fall out from the key groove of the seamless tube (1), and a part of the card key is stuck in the seamless tube (1) Inside the keyway, part of it is limited by the ferrule (8) on the outside so that it will not fall off. The outer limit of the ferrule (8) is limited by the ferrule fixing device (9).

Claims (7)

1. A fluid carrying pressure line connection and sealing apparatus comprising:

the head part is provided with grooved seamless tubes (1), a tube sleeve (2), a butt joint clamping key (3), a pressure response type seal (5), a guide lining (6), a clamping key (7), a clamping sleeve (8), a clamping sleeve limiting device (9) and other parts.

2. Connecting the two butted pipelines in a radial direction, and simultaneously sealing the pipelines to prevent the fluid from leaking; the structure is high pressure resistant, can be used for pipeline connection of various pipe diameters, is convenient to install and connect, is convenient to replace and seal, is particularly convenient for rigid connection long-distance liquid supply pipelines, is reliable in sealing and not easy to damage, is convenient to produce and process, does not damage the pressure resistance strength of the pipelines when machining connecting grooves, and does not reduce the inner drift diameter of the pipelines.

3. The grooved seamless tube (1) with a head according to claim is characterized in that:

both ends of the seamless tube are provided with grooves for installing butt clamping keys (3), grooves for installing pressure response type seals (5), grooves for installing guide linings (6), grooves with spring clamping keys for installing clamping keys (7) and installing limiting clamping keys (7) and the like.

4. Pipe sleeve (2) according to the preceding claim, characterized in that:

the pipe sleeve is used for being matched with a seamless pipe (1) with a groove processed at the head, a butt joint clamping key (3), a pressure response type seal (5) and a guide lining (6) for use and is used for sealing high-pressure liquid inside a pipeline.

5. The docking catch (3) according to claim, characterized in that:

the semi-ring structure is internally provided with clamping grooves which can be used for clamping head grooves of the seamless pipe (1) with grooves processed at the head part respectively, and each set of butt joint clamping key (3) adopts two seamless pipes (1) with grooves processed at the head part.

6. The pressure-responsive seal (5) of claim wherein:

the response type seal (5) adopts a pressure response type, the larger the pressure of the internal closed fluid is, the tighter the pressure between the seamless pipe (1) with the groove processed at the head part and the pipe sleeve (2) is, and the better the sealing effect is.

7. The present connecting structure according to claim, characterized in that:

the seamless pipe (1) with the groove processed at the head part is connected by a butt joint clamping key (3) to realize axial limiting, the pipe sleeve (2) and the sealing on the pipe are used for jointly realizing the sealing effect on the liquid in the pipe, and the axial limiting of the pipe sleeve (2) can be limited by adopting various modes such as a set screw, a clamping key and a clamping sleeve without influencing the claim of the patent.

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