CN205534727U - Metal pipeline connecting device - Google Patents

Abstract

A metal pipe connection device, including a first pipe and a second pipe, and also includes an inner connecting pipe, a positioning hollow bolt and a positioning nut; the outer diameter of the inner connecting pipe is smaller than the inner diameter of the first pipe and the inner diameter of the second pipe, and the first The pipe and the second pipe are sealed butted through the inner connecting pipe; the outer peripheral walls of the butt ends of the first pipe and the second pipe are respectively provided with a first pipe flange and a second pipe flange; the outer end of the positioning nut is provided with a locking position; when the second When a pipe is docked with a second pipe, the positioning hollow bolt passes through the first pipe and abuts against the flange of the first pipe, and the positioning nut passes through the second pipe and is threadedly connected with the positioning hollow bolt, so that the flange of the second pipe abuts against the flange of the first pipe. The position of the positioning nut is fixed, so that the first pipeline flange and the second pipeline flange are axially positioned and fixed through the screw connection of the positioning hollow bolt and the positioning nut. The utility model has the beneficial effects of simple installation, low labor cost and maintenance cost, zero scrapping rate and the like. It can be used for connection and installation of various metal pipes.

Description

metal pipe connection

technical field

The utility model relates to a pipeline, in particular to a connection device for metal pipelines.

Background technique

At present, when connecting and installing metal pipes, it is necessary to cut the pipes on site according to the cost of the specific construction site, and to perform welding and other processing on site. The technical requirements for the technicians who install the pipes are relatively high, and special installation tools are also required. . Therefore, the existing metal pipe connection installation has the disadvantages of complex installation process, long installation time, high labor cost, and high scrap rate. In addition, if the pipeline needs to be repaired, a large area of the pipeline will be scrapped, and the maintenance cost will be high.

Utility model content

In order to solve the above technical problems, the utility model provides a metal pipeline connection device which is easy to install, has low labor cost and low maintenance cost.

The technical solution of the utility model includes: a metal pipe connection device, including a first pipe and a second pipe, and also includes an inner connecting pipe, a positioning hollow bolt and a positioning nut; the outer diameter of the inner connecting pipe is smaller than that of the first The inner diameter of the pipeline and the inner diameter of the second pipeline, the first pipeline and the second pipeline are sealed butted through the inner connecting pipe; the outer peripheral walls of the butt ends of the first pipeline and the second pipeline are respectively provided with A pipeline flange and a second pipeline flange; the positioning hollow bolt can pass through the first pipeline and abut on the first pipeline flange, and the positioning nut can pass through the second pipeline and can When abutting against the second pipe flange, the positioning hollow bolt and the positioning nut are screwed together to axially position and fix the first pipe flange and the second pipe flange.

The outer end of the positioning nut is provided with a clamping position, and the positioning nut abuts against the convex edge of the second pipe through the clamping position. The front end of the positioning hollow bolt can directly abut against the convex edge of the first pipe, or the rear end can be provided with a clamping position to abut against the convex edge of the first pipeline through the clamping position.

The positioning hollow bolt can be a whole hollow ring, or more than one multi-segment separated arc shape. If it is a multi-segment separated combination, then during production and assembly, it is not necessary to first insert the hollow bolt into the first pipe and then fold it over The convex edge can be directly assembled and screwed with the positioning nut.

A preferred embodiment of the present utility model is that sealing rings are installed between the outer wall of the inner connecting pipe and the inner wall of the first pipeline and the inner wall of the second pipeline, and the sealing ring is used to realize the The inner connecting pipe is in sealing connection with the first pipeline and the second pipeline.

A preferred embodiment of the present invention is that the outer wall of the inner connecting pipe is provided with a sealing ring groove, and the sealing ring is installed in the sealing ring groove.

A preferred embodiment of the present utility model is that at least one isolating rib is provided on the outer wall of the inner connecting pipe.

A preferred embodiment of the present invention is that the diameter of the connecting part of the first pipeline or/and the second pipeline and the inner connecting pipe is reduced, and the outer diameter of the inner connecting pipe is smaller than that of the first pipeline or/and the second pipeline. The inner diameter of the connecting part of the two pipes is larger than the inner diameter of other parts. After the inner connecting pipe is respectively inserted into the diameter-reduced connecting portion of the first pipe or/and the second pipe, the port will finally directly abut against the diameter-reduced portion of the first pipe and/or the second pipe. If one of the first pipeline and the second pipeline has a reduced diameter and the other remains unchanged, the inner connecting pipe must be provided with a clamp, otherwise the inner connecting pipe will swim into the unreduced pipe due to water pressure. That is to say, if both the first pipe and the second pipe are reduced in diameter, the two ends will directly abut against the diameter reduction of the two pipes, so that there is no need to clamp the internal connecting pipe and it will not be displaced due to the water pressure in the pipe roam.

The beneficial technical effects of the utility model include: during the operation of using the pipeline connection device, first insert one end of the inner connecting pipe into the first connecting pipe, and then insert the other end of the inner connecting pipe into the first connecting pipe. The second connecting pipe connects the first pipe and the second pipe, the positioning hollow bolt passes through the first pipe and abuts against the flange of the first pipe, and the positioning nut passes through the second pipe. The pipeline is threadedly connected with the positioning hollow bolt, so that the flange of the second pipeline abuts against the locking position of the positioning nut, so that the first pipeline is screwed through the positioning hollow bolt and the positioning nut. The flange is positioned and fixed in the axial direction with the flange of the second pipe, so that the connection between the pipes can be realized by hand without any installation tools and on-site processing and other processes. Wherein, the threaded connection between the positioning hollow bolt and the positioning nut is used to directly clamp the first pipe flange and the second pipe flange between the positioning hollow bolt and the positioning nut, so as to realize the connection between the first pipe and the second pipe. For the axial positioning of the interface, the connection structure is simple, the operation is easy, and the structure is more stable. Secondly, sealing rings are respectively installed between the outer wall of the inner connecting pipe and the inner wall of the first connecting pipe and the inner wall of the second connecting pipe, and the inner connecting pipe is inserted into the first connecting pipe and the second connecting pipe, The seal connection between the inner connecting pipe and the first connecting pipe and the second connecting pipe is realized by means of the sealing ring, thereby realizing the butt communication between the first pipe and the second pipe. Third, the middle part of the outer wall of the internal connecting pipe is provided with an isolating rib, and the nozzles of the first pipe and the second pipe are respectively abutted against the two sides of the isolating rib of the inner connecting pipe to realize butt joint and due to the setting of the isolating rib The internal connecting pipe can be positioned at the nozzles of the first pipeline and the second pipeline, and the internal connecting pipe will not wander due to pressure changes in the pipelines. If when connecting the first pipeline and the second pipeline, when there is a situation that the pipeline needs to be lengthened in the middle, a longer-sized internal connecting pipe can be inserted into the first pipeline and the second pipeline, and the outer walls of the two ends of the internal connecting pipe are provided with respective An isolating rib is provided, and the nozzle of the first pipeline and the nozzle of the second pipeline respectively abut against the outer sides of the two isolating ribs, so as to realize the assembly of the extended pipeline. Fourth, the diameter of the pipeline is directly changed, and the two ends of the inner connecting pipe are respectively clamped at the changing diameter, so that the inner connecting pipe will not wander due to pressure changes in the pipeline, making the structure more stable.

To sum up, the utility model has beneficial effects such as simple structure, easy installation, low labor cost and maintenance cost, zero scrap rate, and extended pipeline length.

The utility model can be used for connection and installation of various metal pipes.

Description of drawings

Fig. 1 is a schematic cross-sectional view of the structure of the metal pipe connection device of Embodiment 1 when the positioning hollow bolt 4 and the positioning nut 5 are not screwed together.

Fig. 2 is a schematic cross-sectional view of the installed metal pipe connection device of the first embodiment.

detailed description

Embodiment one

As shown in FIGS. 1 and 2 , a metal pipe connection device includes a first pipe 1 , a second pipe 2 , an inner connecting pipe 3 , a positioning hollow bolt 4 and a positioning nut 5 . The outer diameter of the inner connecting pipe 3 is smaller than the inner diameter of the first pipe 1 and the inner diameter of the second pipe 2, and the middle part of the outer wall of the inner connecting pipe 3 is provided with an isolation rib 31, on both sides of the isolation rib 31 and in the inner connecting pipe. The outer wall of 3 is respectively provided with sealing ring groove 31, is provided with sealing ring 6, and sealing ring 6 is installed in described sealing ring groove 32. The seal ring 6 is installed in the seal ring groove 32 to realize the positioning of the seal ring 6 and avoid its displacement due to installation friction. The sealing connection between the inner connecting pipe 3 and the first pipeline 1 and the second pipeline 2 is realized by means of the sealing ring 6 . A first pipe flange 11 and a second pipe flange 21 are respectively provided on the outer peripheral walls of the butt ends of the first pipe 1 and the second pipe 2 . When connecting the first pipe 1 and the second pipe 2, insert the two ends of the inner connecting pipe 3 into the first pipe 1 and the second pipe 2 respectively, so that the flange 11 of the first pipe and the flange 21 of the second pipe respectively abut against each other. On both sides of the isolation rib 31 of the inner connecting pipe 3, the outer end of the positioning nut 5 is provided with a locking position 51; when the first pipeline 1 and the second pipeline 2 are docked, the positioning hollow bolt 4 Pass through the first pipe 1 and abut against the flange 11 of the first pipe, and the positioning nut 5 passes through the second pipe 2 and is threadedly connected with the positioning hollow bolt 4, so that the second pipe The flange 21 abuts against the clamping position 51 of the positioning nut 5, so that the first pipe flange 11 and the second pipe flange are connected through the threaded connection between the positioning hollow bolt 4 and the positioning nut 5. 21 axially positioned and fixedly connected. Furthermore, the connection between the pipes can be realized by hand without any installation tools and on-site processing procedures. Wherein, the threaded connection between the positioning hollow bolt 4 and the positioning nut 5 is used to directly clamp the first pipeline flange 11 and the second pipeline flange 21 between the positioning hollow bolt 4 and the positioning nut 5 to realize the first The axial positioning of the butt joints of the pipeline 1 and the second pipeline 2 has a simple connection structure, easy operation, and a more stable structure.

Claims (5)

1. A metal pipe connection device, comprising a first pipe and a second pipe, and also includes an inner connecting pipe, a positioning hollow bolt and a positioning nut; the outer diameter of the inner connecting pipe is smaller than the inner diameter of the first pipe and the second The inner diameter of the pipeline, the first pipeline and the second pipeline are sealed butted through the inner connecting pipe; the first pipeline flange and the second pipeline flange are respectively arranged on the outer peripheral walls of the butt ends of the first pipeline and the second pipeline. Two pipeline flanges; the positioning hollow bolt can pass through the first pipeline and abut on the first pipeline flange, and the positioning nut can pass through the second pipeline and abut against the second pipeline. On the pipe flange, the positioning hollow bolt and the positioning nut are engaged and screwed together to axially position and fix the first pipe flange and the second pipe flange. 2. The metal pipeline connection device according to claim 1, wherein sealing rings are respectively installed between the outer wall of the inner connecting pipe, the inner wall of the first pipeline and the inner wall of the second pipeline, by means of The sealing ring realizes the sealing connection between the inner connecting pipe and the first pipeline and the second pipeline. 3. The metal pipe connection device according to claim 2, wherein the outer wall of the inner connecting pipe is provided with a sealing ring groove, and the sealing ring is installed in the sealing ring groove. 4. The metal pipe connection device according to claim 1, wherein at least one isolation rib is provided on the outer wall of the inner connecting pipe. 5. The connecting device for metal pipes according to claim 1, characterized in that, the connecting portion of the first pipe or/and the second pipe and the inner connecting pipe is reduced in diameter, and the outer diameter of the inner connecting pipe is smaller than the The inner diameter of the connecting part of the first pipe or/and the second pipe is larger than that of other parts.