CN209100831U - Assembling pipe joint - Google Patents

Abstract

The utility model provides a pipe connection device, which is used for connecting a first pipe body and a second pipe body, comprising: an outer sleeve extrusion part, the outer sleeve extrusion part includes two sleeve compression parts; an inner sealing sleeve; two Sealing elements, two of which are respectively located at two ends of the inner sealing sleeve; a preset distance exists between the first pipe body and the second pipe body; the pipe connecting pipe device further comprises: The first connecting piece is used to connect two of the sleeve pressing pieces; the pipeline connecting pipe device also includes two sets of second connecting pieces, and one set of the second connecting pieces is used to connect one of the The sleeve pressing piece and the first pipe body, and another set of the second connecting pieces are also used for connecting another sleeve pressing piece and the second pipe body. The pipeline connecting device provided by the utility model is convenient to operate and does not need to deform the connecting pipeline.

Description

Pipe connection device

technical field

The utility model relates to the technical field of machinery, in particular to a pipeline connection device.

Background technique

In the construction of pipeline engineering, different connection methods should be selected according to the material of the pipes used. Ordinary steel pipes have threaded connections, welding and flange connections; seamless steel pipes, non-ferrous metal and stainless steel pipes are mostly welded and flanged; cast iron pipes are mostly socket connections, and a few use flange connections; plastic pipes are mostly threaded connections , bonding and hot melt connection, etc., and other non-metallic pipe connections have various forms. At present, the pipeline connections are basically small-diameter pipelines mostly using screw connections to achieve leak-free sealing connections, and large-scale pipelines using welding or flange connections.

There are three ways for the connection of the pipe thread: the cylindrical inner thread is inserted into the cylindrical outer thread, the cylindrical inner thread is inserted into the conical outer thread, and the conical inner thread is inserted into the conical outer thread. Among them, taper thread connection is a commonly used connection method.

In order to increase the tightness of the threaded interface of the pipe and prevent it from being easily disassembled due to thread corrosion during maintenance, fillers are generally added to the threads. Therefore, the filler should not only fill the voids, but also prevent corrosion. In order to ensure the long-term tightness of the interface, the thread of the pipe should not be too loose, and more filling materials should not be used to prevent leakage. It should be noted that the packing can only be used once in the threaded connection, if it is disassembled, it should be replaced.

Use a suitable pipe wrench for tightening the pipe threads. Do not tighten the pipe by adding a sleeve to the handle of the pipe wrench. After the pipe thread is tightened, 1 to 2 threads (ie, thread tail) should be exposed outside the pipe fitting or valve fitting. Do not screw all the threads in. The excess hemp wire should be cleaned and treated with anti-corrosion. When installing the pipe fittings, pay attention to the position and direction of the pipe fittings, and do not twist upside down.

Flange connection is to connect two pipes, fittings or equipment. It is a detachable joint in which each is fixed on one flange, then a flange gasket is added between the two flanges, and finally the two flanges are tightened with bolts to make them tightly combined.

This connection is mainly used for the connection of cast iron pipes, rubber-lined pipes, non-ferrous metal pipes and flanged valves, etc. The connection between process equipment and flanges is also flanged.

The parts that need to be disassembled for the flange connection of steel pipes are related to the connection of flanged valves, equipment, instruments, etc. Flanges are available in cast iron and steel. There are three types of connection between flange and pipe: flanging loose sleeve, threaded connection and welding connection. Flat-welded steel flange connection is mostly used in pipe installation.

Flanged flange connection. Flanging loose flanges are generally used for pipes of similar materials such as copper pipes, lead pipes, plastic pipes, etc. When flanging, different operation methods are selected according to different materials. The flanging requires smoothness without cracks and wrinkles.

Threaded flange connection is used to connect the flange with internal thread to the steel pipe with external thread. This flange is mostly made of cast iron and can be used for the connection of low-pressure pipelines.

Welded flange connection, the flange and the steel pipe are connected by welding, this kind of flange connection is widely used. The welding method is: choose a pair of flanges and install them on the two connected pipe ends. If some equipment already has flanges, choose the flanges of the same specification to be placed in the waiting area, and spot weld a little first. Correct the verticality, and finally weld the flange to the pipe firmly. The inner and outer sides of the flat welding flange must be welded to the pipe. The characteristics of the connection: the interface is firm and tight, and the strength of the weld generally reaches more than 85% of the strength of the pipe, or even exceeds the strength of the base metal. Welded connection is the direct connection between pipe sections, with simple structure, beautiful and neat pipeline, saving a lot of shaped pipe fittings. The interface is tight and no packing is needed, which can reduce maintenance work. The interface is not limited by the diameter of the pipe, and the operation speed is fast. The welding connection interface is a fixed interface, which is difficult to connect and disassemble. If the pipeline needs to be repaired or cleaned, the pipeline must be cut off. Metal pipe welding: Welded connections are mainly used for butt joints, welded flanges and other flexible ports of water supply steel pipes. The welding methods usually include gas welding, manual electric welding, automatic arc welding, contact welding, etc. Pipes should be thoroughly cleaned and inspected prior to welding.

When the steel pipes are connected to each other, the longitudinal welds should be staggered by more than 100mm arc length, and there should be no cross-shaped welds; the welds should not be placed in the walls of buildings, structures, etc.

When the steel plate is coiled, the longitudinal welds of each pipe cannot be arranged on the same straight line, and the distance between the longitudinal welds of two adjacent pipes should be greater than 3 times the wall thickness and not less than 100mm; The distance between adjacent longitudinal welds should not be less than 300mm. There shall be no welding seam in the bending part of the pipeline, and the distance from the butt welding seam to the bending point shall not be less than the outer diameter of the pipe, and shall not be less than 100mm (except for the welded elbow). There shall be no circumferential welds at the pipe supports.

The current groove packing sealing connection device is mainly used for the connection of fire fighting pipelines in buildings. The connection device needs to press a groove on the edge of the pipe end. This groove is used to fix the connection device and place the sealing packing. Other pipeline connection methods will not be repeated here. In short, each of the existing pipeline connection technologies is not very versatile, either only suitable for small-diameter pipelines, or only suitable for medium- or large-diameter pipelines, or only suitable for the connection of pipelines. It is suitable for the connection of metal pipelines, or only suitable for non-metallic pipelines. There may be many factors such as insufficient pressure resistance, cumbersome and labor-intensive connection methods, or high cost of connection methods. Many pipeline connection devices cannot be used as expansion joints. Existing expansion joints The fittings basically use bellows or bending expansion.

Therefore, it is necessary to provide a new pipeline connection device to solve the above-mentioned technical problems.

Utility model content

The technical problem solved by the utility model is to provide a pipeline connection device to solve the technical problems in the prior art that the pipeline connection and assembly operation is inconvenient, time-consuming, and the pipeline needs to be deformed.

In order to solve the above-mentioned technical problems, the pipeline connection device provided by the present invention is used for connecting the first pipe body and the second pipe body, including:

a jacket extrusion, the jacket extrusion includes two jacket extrusions;

an inner sealing sleeve, the inner sealing sleeve is arranged in the outer sleeve extrusion part;

two seals, the two seals are respectively located at both ends of the inner sealing sleeve, and the seals are located between the inner sealing sleeve and the sleeve pressing part;

Wherein, the first pipe body successively penetrates one of the sleeve pressing parts and the sealing parts, and extends into the inner sealing sleeve, and the second pipe body successively penetrates the other sleeve pressing part, the said inner sealing sleeve. a sealing member extending into the inner sealing sleeve, and a preset distance exists between the first pipe body and the second pipe body;

The pipe connecting pipe device further comprises a first connecting piece, the first connecting piece is used for connecting the two sleeve pressing pieces;

The pipe connecting pipe device further includes two sets of second connecting pieces, one set of the second connecting pieces is used to connect one of the sleeve pressing pieces and the first pipe body, and the other set of the second connecting pieces is further It is used to connect the other sleeve pressing piece and the second pipe body.

Preferably, one of the sleeve pressing parts is welded with the first pipe body, and the other sleeve pressing part is welded with the second pipe body.

Preferably, one of the sleeve pressing parts and the first tube body is bonded by an adhesive, and the other sleeve pressing part and the second tube body are bonded by an adhesive.

Preferably, the sleeve pressing member is a tubular structure.

Preferably, the sleeve pressing member includes a tubular portion and a connecting portion, the connecting portions of the two sleeve pressing members abut against each other, and the first connecting member is used to connect the connecting portions of the two sleeve pressing members.

Preferably, the first connecting piece includes a bolt and a nut, one end of the bolt penetrates and connects the two sleeve pressing pieces, and the nut is detachably connected to one end of the bolt.

Preferably, the second connecting member is a fixing bolt, one set of the fixing bolts penetrates through one of the sleeve pressing members and clamps the outer wall of the first pipe body, and the other set of the fixing bolts penetrates through another set of the fixing bolts. The sleeve pressing piece is clamped and the outer wall of the second pipe body is clamped.

Preferably, the pipeline connection device further includes a washer and an inner spring, and the washer and the inner spring are sequentially arranged between the sealing member and the inner sealing sleeve.

Preferably, the pipe connection device further comprises a telescopic spring, which elastically connects the nut and one end of the bolt.

Preferably, the sealing member is a sealing gasket or a sealing packing.

In the pipeline connection device provided by the present invention, the sealing member is located between the inner sealing sleeve and the sleeve pressing member; when the first pipe body extends into the inner sealing sleeve, the second pipe body extends into the inner sealing sleeve. In the inner sealing sleeve, and when there is a preset distance between the first pipe body and the second pipe body, connecting the two sleeve pressing parts through the first connecting piece can better compact the space. The sealing member is used to ensure the tightness between the first tube body and the sleeve pressing member, as well as the second tube body and the sleeve pressing member;

One set of the first connectors is used to connect one of the sleeve pressing parts and the first pipe body, and the other set of the first connecting parts is also used to connect the other sleeve pressing part and the second tube body. pipe body, so as to complete the assembly connection of the first pipe body and the second pipe body.

The pipeline connection device provided by the utility model has the advantages of simple operation, less man-hours, low connection cost, and pressure resistance, which can be adapted to pipelines of various materials and diameters, and does not need to deform the installation pipelines. Using special equipment to get the pipes out of the grooves or bells, the installers feel easy and convenient, and the pipe connections are sealed and pressure-resistant.

Description of drawings

1 is a schematic structural diagram of a first embodiment of a pipeline connection device provided by the present invention;

Fig. 2 is a partial cross-sectional view of the pipe connection device shown in Fig. 1;

3 is a partial cross-sectional view of a second embodiment of the pipeline connection device provided by the present invention;

FIG. 4 is a schematic structural diagram of a third embodiment of the pipeline connection device provided by the present invention.

Description of reference numbers:

1- The first pipe body, 2- The second connecting piece (fixed screw), 3- The outer casing extrusion piece, 4- The first connecting piece (screw nut), 5- The inner sealing sleeve, 6- The sealing piece, 7 -Second tube body, 8- screw hole, 9- inner spring, 10- washer, 11- telescopic spring, 12- nut.

The realization, functional characteristics and advantages of the purpose of the present utility model will be further described with reference to the accompanying drawings in conjunction with the embodiments.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, not all of them. Example. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the difference between the various components under a certain posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly.

In addition, descriptions such as "first", "second", etc. in the present invention are only used for description purposes, and should not be understood as indicating or implying their relative importance or implicitly indicating the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise expressly and specifically defined.

In the present utility model, unless otherwise expressly specified and limited, the terms "connection", "fixed" and the like should be understood in a broad sense, for example, "fixed" can be a fixed connection, a detachable connection, or an integrated; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication between two elements or the interaction relationship between the two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but must be based on the realization by those of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that such technical solutions The combination does not exist and is not within the protection scope required by the present invention.

The utility model provides a pipeline connection device.

Please refer to FIG. 1, in the first embodiment of the present utility model, the pipeline connection device, used to connect the first pipe body 1 and the second pipe body 7, includes:

A jacket extrusion 3, the jacket extrusion 3 includes two jacket extrusions;

an inner sealing sleeve 5, the inner sealing sleeve 5 is arranged in the outer sleeve extrusion part 3;

Two seals 6, the two seals 6 are respectively located at both ends of the inner sealing sleeve 5, and the seals 6 are located between the inner sealing sleeve 5 and the sleeve pressing part;

Wherein, the first pipe body 1 sequentially penetrates one of the sleeve pressing member and the sealing member 6, and extends into the inner sealing sleeve 5, and the second pipe body 7 sequentially penetrates the other sleeve pressing member the sealing member 6, and extends into the inner sealing sleeve 5, and there is a preset distance between the first pipe body 1 and the second pipe body 7;

The pipe connecting pipe device further includes a first connecting piece 4, and the first connecting piece 4 is used to connect the two sleeve pressing pieces;

The pipe connecting pipe device also includes two sets of second connecting pieces 2, one set of the second connecting pieces 2 is used to connect one of the sleeve pressing pieces and the first pipe body 1, and the other set of the second connecting pieces 2 The connecting piece 2 is also used to connect the other sleeve pressing piece and the second pipe body 7 .

In the pipeline connection device provided by the present invention, the sealing member 6 is located between the inner sealing sleeve 5 and the sleeve pressing member; when the first pipe body 1 extends into the inner sealing sleeve 5, the second When the pipe body 7 extends into the inner sealing sleeve 5, and there is a preset distance between the first pipe body 1 and the second pipe body 7, the first connecting member 4 is used to connect the two The sleeve pressing member can better compact the sealing member 6 to ensure the tightness between the first pipe body 1 and the sleeve pressing member, and the second pipe body 7 and the sleeve pressing member;

One set of the first connecting pieces 4 is used to connect one of the sleeve pressing pieces and the first pipe body 1 , and the other set of the first connecting pieces 4 is also used to connect the other sleeve pressing piece to the first pipe body 1 . The second pipe body 7 is described, thereby completing the assembly and connection of the first pipe body 1 and the second pipe body 7 .

The pipeline connection device provided by the utility model has the advantages of simple operation, less man-hours, low connection cost, and pressure resistance, which can be adapted to pipelines of various materials and diameters, and does not need to deform the installation pipelines. Using special equipment to get the pipes out of the grooves or bells, the installers feel easy and convenient, and the pipe connections are sealed and pressure-resistant.

In this embodiment, one of the sleeve pressing parts is welded with the first pipe body 1, and the other sleeve pressing part is welded with the second pipe body 7, so as to cope with the excessive pressure inside the pipeline. Happening.

In other embodiments, one of the sleeve pressing parts and the first pipe body 1 is bonded by an adhesive, and the other sleeve pressing part and the second pipe body 7 are bonded by an adhesive bonding.

Referring to FIG. 2 , in this embodiment, the sleeve pressing member is a tubular structure, and a screw hole 8 is formed on the sleeve pressing member for the first connecting member 4 to pass through.

Please refer to FIG. 3 , in the second embodiment, the sleeve pressing piece includes a tubular part and a connecting part, the connecting parts of the two sleeve pressing parts abut against each other, and the first connecting piece 4 is used to connect the two A screw hole 8 is formed on the connecting part of the sleeve pressing piece.

The first connecting piece 4 includes a bolt and a nut 12 , one end of the bolt is penetratingly connected to two sleeve pressing pieces, and the nut 12 is detachably connected to one end of the bolt.

The second connecting piece 2 is a fixing bolt, one set of the fixing bolts penetrates one of the sleeve pressing pieces and clamps the outer wall of the first pipe body 1, and the other set of the fixing bolts penetrates the other Sleeve the pressing piece, and clamp the outer wall of the second pipe body 7 .

The sealing member 6 is a sealing gasket or a sealing packing.

Please refer to FIG. 4 , based on the pipeline connection device provided by the first embodiment of the present invention, the difference between the pipeline connection device provided by the third embodiment of the present invention is:

The pipeline connection device further includes a washer 10 and an inner spring 9 , and the washer 10 and the inner spring 9 are sequentially arranged between the sealing member 6 and the inner sealing sleeve 5 .

The pipeline connection device further includes a telescopic spring 11 which elastically connects the nut 12 and one end of the bolt.

The built-in spring 9 plays the role of adjusting the expansion and contraction of the pipeline, and at the same time, it can compact the sealing packing. After being installed in the same way as the pipeline connection device, the expansion spring 11 is installed on the tensioning screw.

The technical solution of the third embodiment can be used for the expansion and contraction of the pipeline to adapt to the change of the pipeline length caused by the temperature change.

The assembling method of the pipeline connection device provided by this embodiment is as follows:

First, according to the diameter of the first pipe body 1 and the second pipe body 7, select the matching pipe connection device;

The first tube body 1 and the second tube body 7 are respectively sleeved into the two sleeve pressing parts, and a preset distance is left between the first tube body 1 and the second tube body 7;

Then put the sealing member 6 into the two sleeve pressing members of the first tube body 1 and the second tube body 7 respectively;

Then install the washers 10 respectively, and then install the inner springs 9 respectively.

The two ends of the inner sealing sleeve 5 are respectively sleeved into the first pipe body 1 and the second pipe body 7;

Finally, the two sleeve pressing parts are placed in the nut 12 with the screw nut 12 and the telescopic spring 11 is placed in the nut 12 and tightened symmetrically, thus completing the installation of the pipe connection device.

The above are only the preferred embodiments of the present utility model, and are not intended to limit the scope of the present utility model patent. Under the conception of the present utility model, any equivalent structural transformations made by using the contents of the present utility model description and accompanying drawings, or direct/indirect Applications in other related technical fields are included in the scope of patent protection of the present invention.

Claims (10)

1. A pipeline connection device for connecting a first pipe body and a second pipe body, characterized in that, comprising: a jacket extrusion, the jacket extrusion includes two jacket extrusions; an inner sealing sleeve, the inner sealing sleeve is arranged in the outer sleeve extrusion part; two seals, the two seals are respectively located at both ends of the inner sealing sleeve, and the seals are located between the inner sealing sleeve and the sleeve pressing part; Wherein, the first pipe body successively penetrates one of the sleeve pressing parts and the sealing parts, and extends into the inner sealing sleeve, and the second pipe body successively penetrates the other sleeve pressing part, the said inner sealing sleeve. a sealing member extending into the inner sealing sleeve, and a preset distance exists between the first pipe body and the second pipe body; The pipe connecting pipe device further includes a first connecting piece for connecting the two sleeve pressing pieces; The pipe connecting pipe device further includes two sets of second connecting pieces, one set of the second connecting pieces is used to connect one of the sleeve pressing pieces and the first pipe body, and the other set of the second connecting pieces is further It is used to connect the other sleeve pressing piece and the second pipe body. 2 . The pipeline connection device according to claim 1 , wherein one of the sleeve pressing parts is welded with the first pipe body, and the other sleeve pressing part is welded with the second pipe body. 3 . welding. 3 . The pipeline connection device according to claim 1 , wherein one of the sleeve pressing parts and the first pipe body is bonded by an adhesive, and the other sleeve pressing part is connected to the first pipe body. 4 . The two pipes are bonded by adhesive. 4. The pipeline connection device according to claim 1, wherein the sleeve pressing member is a tubular structure. 5. The pipeline connection device according to claim 1, wherein the sleeve pressing member comprises a tubular part and a connecting part, the connecting parts of the two sleeve pressing parts abut against each other, and the first connecting member is used for Connect the connecting parts of the two sleeve pressing pieces. 6 . The pipeline connection device according to claim 5 , wherein the first connecting member comprises a bolt and a nut, one end of the bolt penetrates and connects two sleeve pressing parts, and the nut is connected to the bolt. 7 . One end of the detachable connection. 7 . The pipeline connection device according to claim 1 , wherein the second connecting member is a fixing bolt, and a group of the fixing bolts penetrates through one of the sleeve pressing members and clamps the first pipe body. 8 . The outer wall of the second pipe body is clamped by another set of the fixing bolts passing through the other set of the sleeve pressing parts. 8. The pipeline connection device according to claim 6, wherein the pipeline connection device further comprises a washer and an inner spring, and the washer and the inner spring are sequentially arranged between the sealing member and the inner sealing sleeve. between. 9 . The pipeline connection device according to claim 8 , wherein the pipeline connection device further comprises a telescopic spring that elastically connects the nut and one end of the bolt. 10 . 10. The pipeline connection device according to any one of claims 1-9, wherein the sealing member is a sealing gasket or a sealing packing.