KR20140126541A - Joint device of pipeline for fluid transportation - Google Patents

Abstract

The present invention relates to a connecting device of a fluid conveyance pipe.
The present invention is characterized in that packing grooves 105 and 106 for inserting a packing 30 are formed in cylindrical pipe insertion holes 100 and 200 into which fluid transfer pipes 50 and 60 are inserted, A pair of first flange couplings 10 and a second flange coupling 20 in which a plurality of bolt holes 103 and 204 are formed in the flanges 102 and 202 formed from the bolts 40 and 200, A protrusion 208 in which a female screw 209 is formed from a bolt fastening hole 203 is integrally formed on the surface 207 of the second flange coupling 20, So that the bolt 40 can be fastened.

Description

[0001] JOINT DEVICE OF PIPELINE FOR FLUID TRANSPORTATION [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an apparatus for connecting a transfer tube for transferring fluids, and more particularly, to a method for assembling fluid transfer tubes using a coupling, To a fluid conveyance pipe connection device which can be supported on a wall surface of an installation place while being connected to a work site without being restricted by the installation space.

Generally, there are a permanent connection method and a disassembly connection method as a method of connecting a pipe (tube). Permanent bonding method is a case where it is not necessary to disassemble, and there is a weld joint and a soldering joint, the contents do not leak out, and maintenance and facility cost are saved. The decomposition and bonding method is applied to the case where the pipe should be disassembled if breakage occurs, such as flange coupling, threaded pipe joint, stretch joint, socket joint, etc.

Flange couplings are made by forming flanges on the joints and joining them with bolts. They have a structure such as a screw coupling, a turning flange, a rivet flange, a weld flange, and a brazing flange.

Screwed pipe joints are made by drilling a pipe screw into the end of the pipe and joining it using elbows, tubes, tubes, crosses, sockets, bands, unions and nipples.

Elastic joints are stretchable rubber joints, waveforms, slip joints, and band joints, which are used in places with a large temperature difference.

Socket insertion joint is used to connect underground pipe which mainly transports water, sewage and gas because there is no corrosion of the bolt by taking advantage of the bending property of the pipe.

In particular, flange couplings should be used when the diameter of the fluid delivery tube is large and the internal pressure is high or it needs to be disassembled for maintenance.

Flange couplings are made of metal materials, including cast iron, cast steel, forged steel, steel plates, bronze, brass, etc., and are used to twist the flange to the fluid transfer tube, to rivet, rivet, And a seal is sealed with a packing on the contact side.

When the fluid is transported at a long distance, the tubes connected to each other by a certain unit length are connected to each other by using a pipe joint having various structures depending on the type of the transfer material. Specifically, a circumferential flange is formed at a portion where the fluid transfer pipe is coupled, and a pair of coupling rings, each of which is installed in the fluid transfer pipe, are fastened and fixed by bolts, The coupling and the fluid transfer tube are joined together by welding to connect the two fluid transfer tubes. The structure of such pipe joints requires ease of operation, durability and airtightness.

1 shows a conventional fluid delivery pipe connection device using a flange coupling. As shown in the drawing, a first flange coupling 10 and a second flange coupling 20 are provided at the ends of the two fluid transfer pipes 50 and 60 to be connected, respectively, and the fluid transfer pipe 50 The first flange coupling 10 and the second flange coupling 20 are positioned so that the packing 30 is in contact between the first flange coupling 10 and the second flange coupling 20 when the first and second flange couplings 10, 2 flange coupling 20 is formed by a bolt 40 and a nut 41 which are inserted and fastened to a plurality of bolt fastening holes 103 and 203 formed in flanges 102 and 202, The first flange coupling 10 and the second flange coupling 20 are welded and fixed to the fluid transfer tubes 50 and 60, respectively, while the first flange coupling 10 and the second flange coupling 20 are hermetically sealed.

The connection of the pair of flange couplings (10, 20) in the connecting device of the fluid transfer pipe using the flange coupling is achieved by the bolt (40) and the nut (41). That is, the bolt fastening holes 103 and 203 provide only a space into which the bolt 40 is inserted, and the nut 41 is fastened to the bolt 40 inserted therein, thereby connecting the fluid transfer pipes 50 and 60 There is binding force and air tightness.

This structure necessarily requires bolts 40 and nuts 41 to connect a pair of first flange couplings 10 and second flange couplings 20, The number of parts increases due to the use of the nuts, and the work of fastening is also inconvenient, so that the workability is inevitably lowered.

Further, since the first flange coupling 10 and the second flange coupling 20 are usually made of castings, they are difficult to manufacture and have a disadvantage that their weight per unit product is relatively heavy.

On the other hand, the fluid transfer pipe may be connected to the flange coupling in a state where the fluid transfer pipe is installed close to the corner where the two sides of the wall intersect, and in some cases, It may be located at the corner of the wall. However, since the flanges 102 and 103 are usually formed in a circular shape, the outer rounded surface can not be firmly supported on the wall when the outer rounded surface comes into contact with the wall, There is a limiting factor which is difficult to be installed close to the corner portion.

Korean Patent Publication No. 10-2009-59288 Korean Patent No. 10-808545 Japanese Patent Application 93-341241

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems of the prior art, and it is an object of the present invention to reduce the weight of parts used for connecting flange couplings to each other, And a fluid conveyance pipe connection which can be firmly supported on a wall surface of the installation site as the connection operation of the fluid conveyance pipe becomes convenient even when the flange coupling is close to the edge portion of the wall without being restricted by the installation space at the construction site Device.

Technical features of the present invention to achieve the object of the present invention are as follows. A pair of couplings, in which a bolt fastening hole is formed in a flange formed from an insertion portion into which a fluid conveyance pipe is inserted, are fastened to flange couplings Thus, the protruding portion on which the female screw is formed from the bolt fastening hole is integrally formed on the surface of the one flange, so that the bolt can be fastened without a separate nut.

The present invention does not use a nut when connecting the flange couplings to each other, thereby reducing parts and facilitating assembly work in the field.

As a technical structure of the present invention, at least one plane is formed on the circumferential surface of the flange so as to be in contact with the wall. The at least one plane is supported in contact with one of the wall surfaces, and the two planes are supported while being in contact with both wall surfaces, so that the fluid transfer tube can be firmly installed close to the corner between the walls.

Accordingly, the present invention provides a connection device for a fluid conveyance pipe that is more reliable than a conventional connection method in which a flange is formed in a circular shape using bolts and nuts for connecting flange couplings.

According to the present invention, since a separate nut is not used when connecting the flange coupling, it is possible to reduce the number of components, thereby simplifying the connection work and improving workability. When the flange coupling is installed close to the wall surface, So that the installation work can be facilitated and can be firmly supported on the wall surface.

FIG. 1 is a perspective view of a conventional three-
Fig. 2 is a perspective view of a fluid conduit pipe connecting apparatus according to the present invention.
3 is a cross-sectional view of the fluid delivery pipe connecting device according to the present invention
Fig. 4 is an enlarged view of part A of Fig. 3 of the present invention
5 is a view showing another embodiment of the present invention

Technical features and advantages of the present invention will be more clearly understood by referring to the embodiments described with reference to the accompanying drawings.

Hereinafter, embodiments of the present invention will be described.

2 to 5 show views related to an example in which the present invention is embodied.

As shown in this figure, the fluid delivery pipe connecting apparatus of the present invention is composed of a first flange coupling 10, a second flange coupling 20, a packing 30, and a bolt 40.

The first flange coupling 10 is formed into a cylindrical shape and a pipe insertion hole 100 into which the fluid transfer pipe 50 is inserted is formed and the first flange coupling 10 is inserted from one end of the insertion portion 101 into which the packing 30 is inserted, The flange 102 is formed.

The flange 102 is formed with a plurality of bolt holes 103 in the circumferential direction from the axial center.

The second flange coupling 20 is formed in a cylindrical shape like the first flange coupling 10 described above and the pipe insertion hole 200 into which the fluid transfer pipe 60 is inserted is formed, A flange 202 is formed from one end of the insertion portion 201 to be disc-shaped.

A plurality of bolt fastening holes 203 are formed in the flange 202 in the circumferential direction from the axial center of each bolt fastening hole 203. Each of the bolt fastening holes 203 has a protruding portion 208 projecting from one surface 207 of the flange 202 And a female screw 209 to which the bolt 40 is fastened is formed.

The first flange coupling 10 and the second flange coupling 20 may be manufactured by pressing a metal material, such as a cast steel, a steel plate, bronze, brass or the like, or by molding a synthetic resin. 101 and 201 and the flanges 102 and 202 are formed to be thinner than the thickness of a conventional casting product, thereby facilitating fabrication, reducing material costs, and reducing weight.

The curved portions 103 and 203 (104 and 204) are formed at the connection portions of the insertion portions 101 and 201 and the insertion portions 101 and 201 and the flanges 102 and 202, It is possible to improve the strength by dispersing the stress.

The packing 30 is formed of silicone or rubber.

The present invention thus constituted is characterized in that the flange 102 of the first flange coupling 10 and the flange 202 of the second flange coupling 20 face each other, The fluid transfer pipe 50 is inserted into the pipe insertion hole 200 of the second flange coupling 20 and the fluid transfer pipe 60 is inserted into the pipe insertion hole 200 of the second flange coupling 20.

And the bolts 40 are inserted into the second flange coupling 20 through the bolt holes 103 of the first flange coupling 10, The first flange coupling 10 is welded to the fluid transfer pipe 50 by welding and the second flange coupling 10 is welded to the second flange coupling 20 by welding with the female thread 209 formed in the bolt fastening hole 203 of the first flange coupling 203. [ 20 has a contact surface 300 on which the outer diameter of the pipe insertion hole 100 of the first flange coupling 10 and the fluid transfer pipe 50 are in contact with each other when welded to the fluid transfer pipe 60, The contact surface 301 where the pipe insertion hole 200 of the flange coupling 20 contacts the outer diameter of the fluid transfer pipe 60 is fused by welding and the connection operation of the fluid transfer pipes 50 and 60 is completed.

The coupling operation is performed by a bolt fastening hole 203 formed in the second flange coupling 20 including the protruding portion 208, so that a separate nut is not needed, so that the fastening operation can be easily performed do.

FIG. 5 is a side view showing an embodiment of the present invention according to the installation place. One plane P1 is formed in the flange 102 of the first flange coupling 10 and the flange 202 of the second flange coupling 20 to form the flange 102 And 202 are combined, the planes P1 are coupled together. This makes it possible for the fluid transfer tube to be firmly held close to the wall surface by being in contact with the wall surface W1.

5 (B) is a plan view of the flange 101 (Fig. 5), in which two planes P2 and P3 are arranged side by side on both sides of the flanges 101 and 102. In the narrow space between the two wall faces W2 and W3, P2 and P3 are supported on both wall surfaces W2 and W3.

5 (C) is formed at both sides of the flanges 101 and 102 at the positions where the two planes P4 and P5 intersect. In the corner portions formed on the two wall surfaces W4 and W5, And the planes P4 and P5 of the base plate W4 are supported on both wall surfaces W4 and W5.

10: first flange coupling 20: second flange coupling
30: Packing 40: Bolt
100: Pipe insertion hole 101: Insertion part
102: flange 103: bolt fastening hole
200: pipe insertion hole 201: insertion part
202: flange 203: bolt fastening hole
207: Surface 208:
209: female thread 210: end
300, 301: contact surface

Claims (3)

There is formed insertion portions 101 and 201 for inserting the packing 30 from the cylindrical pipe insertion holes 100 and 200 into which the fluid transfer pipes 50 and 60 are inserted and are formed from the insertion portions 101 and 201 A pair of first flange couplings 10 and a second flange coupling 20 in which a plurality of bolt holes 103 and 204 are formed in the flanges 102 and 202 of the flange 102 are fixed to the bolts 40 In the transfer pipe connecting device,
A protrusion 208 on which a female screw 209 is formed from a bolt fastening hole 203 on the surface 207 of the second flange coupling 20 is integrally formed so that the bolt 40 can be fastened And the fluid passage is connected to the fluid passage.
The method according to claim 1,
Wherein at least one plane (P1, P2, P3, P4, P5) is formed on the circumferential surface of the flanges (102, 202).
The method according to claim 1,
Characterized in that curved curved portions (103, 203) (104, 204) are formed at the connecting portions of the insertion portions (101, 201) and the insertion portions (101, 201) and the flanges (102, 202) Conveying pipe connection device.

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