CN111457176A - Pipeline connecting and sealing device for conveying fluid - Google Patents

Abstract

The patent relates to a pipeline connecting and sealing device for conveying fluid; the method comprises the following steps of adopting parts such as a seamless steel pipe, a pipe sleeve, a butt joint clamping key, a pressure response type seal, a guide lining, an O-shaped ring, a pipe sleeve limiting block, a fixing bolt, a gasket and the like to radially connect two butted pipelines and seal the pipelines to prevent 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 reliable and not easy to damage for rigid connection long-distance liquid supply pipelines, is convenient to produce and process, does not damage the pipelines when being processed into connecting grooves, is high in compressive strength, and does not reduce the inner drift diameter of the pipelines.

Description

A pipeline connection and sealing device for conveying fluid

technical field

This patent relates to the field of fluid transportation, specifically to fluid transportation pipelines

Background technique

The connection methods of the existing fluid conveying pipelines are as follows: 1. The threaded connection is mainly used for low-pressure pipelines. 2. Flange connection, large volume, need to weld flange at the pipe head, complicated assembly operation and low pressure resistance. 3. The socket connection requires the pipe to be plugged and sealed. If it is a rigid pipe, it is not easy to replace the seal. At the same time, the pipe head needs to be processed to the socket. 4. Clamp groove connection requires clamp parts. 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. The ferrule type connector has firm connection, high pressure resistance and good sealing performance, but it can only be used for small-diameter pipes and cannot be used for large-diameter pipes.

None of the existing connection methods of these fluid pipelines can be easily installed, replaced and maintained, and cannot be adapted to seals of various pressure levels and connections of various pipe diameters.

SUMMARY OF THE INVENTION

A new type of pipe connection device is invented, which is composed of seamless steel pipes, pipe sleeves, butt-jointed keys, pressure-responsive seals, guide bushings, O-rings, and pipe sleeve limit blocks. 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, the processing is convenient, the connecting groove does not damage the pipeline, the compressive strength is high, and the inner diameter of the pipeline is not reduced.

Description of drawings

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

Figure 1 is a schematic diagram of the overall structure of the patent.

Fig. 2 is a schematic diagram of the patented connecting pipe and pipe, as well as a schematic diagram of processing connection grooves and sealing grooves at both ends.

Figure 3 is a schematic diagram of the tube sleeve.

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

Description of reference numbers.

1-seamless pipe; 2-pipe sleeve; 3-butt key; 4-pressure responsive seal; 5-guide bushing; 6-O-ring; 7-pipe sleeve limit block; 8-fixing bolt; 9- liner

Detailed ways

The patent will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are a part of the embodiments of this patent, not all of the embodiments, and other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of this patent.

In the description of this patent, 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 drawings. The orientation or positional relationship is only for the convenience of describing this patent and simplifying the description, rather than indicating or implying that the referred device or original must have a characteristic orientation and operate in a specific orientation configuration, so it should not be construed as a limitation on this patent. 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 this patent, it should be noted that, unless otherwise expressly specified and limited, the terms "installation", "connection" and "limiting" should be understood in a broad sense, for example, it may be a fixed connection or a Dismantling connection, or other connection in the same body; it can be a direct connection, or an indirect connection through an intermediate medium, or the internal connection of two original parts; the limit can be a limit block limit, or it can be a tightening screw limit . For those of ordinary skill in the art, the specific meanings of the above terms in this patent can be understood in specific situations.

In addition, the technical features involved in the different embodiments of the present patent described below can be combined with each other as long as there is no conflict with each other.

Example

This patent provides a fluid pipeline connection method. Referring to FIG. 1 , in this embodiment, two pieces of seamless steel pipes (1) are connected by a butt key (3) to restrict the movement of the two pipes in the left and right directions. The movement of the front and rear positions of the two pipes is restricted by the pipe sleeve (2), and a pressure-responsive seal (4) is installed inside the pipe sleeve (2) to seal the fluid inside the pipe from extravasation. A guide bush (5) is installed inside the pipe sleeve (2) to limit the gap between the pipe sleeve (2) and the seamless steel pipe (1). (4) phenomenon, and also plays a guiding role during installation. An O-ring (6) is installed inside the tube sleeve (2) to prevent dust. The pipe sleeve limit block (7) is used to limit the left and right of the pipe sleeve (2). The pipe sleeve limit block (7) is fixed by a fixing bolt (8) and a gasket (9). The pipe sleeve (2) The limit can also be limited by using a set screw.

Claims (5)

1. A pipeline connection and sealing device for conveying fluid comprising: Seamless steel pipe (1), pipe sleeve (2), docking key (3), pressure-responsive seal (4), guide bushing (5), O-ring (6), pipe sleeve limit block (7), Parts such as fixing bolts (8) and gaskets (9) are used to radially connect the two butted pipes while sealing the pipes to prevent fluid leakage; this structure is resistant to high pressure and can be used for pipe connections 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 seal is reliable and not easy to be damaged, which is convenient for production and processing. 2. The seamless steel pipe (1) according to claim is characterized in that: Both ends of the steel pipe are provided with grooves for installing the butt key (3). 3. The pipe sleeve (2) according to claim is characterized in that: There are grooves for installing the pressure-responsive seal (4), guide bushing (5), and O-ring (6) inside the sleeve. 4. The docking card key (3) according to claim is characterized in that: Half-ring structure, each head has 2 grooves, which can be used to clamp the seamless steel pipe (1). . 5. The pressure-responsive seal (4) according to claim is characterized in that: The pressure-responsive seal (4) adopts a pressure-responsive seal. The greater the pressure of the internal sealing fluid, the tighter the pressure between the seamless steel pipe (1) and the pipe sleeve (2), the better the sealing effect.

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