KR100987355B1 - Pipe connecting device of non-welding - Google Patents

Abstract

PURPOSE: A non-welding pipe connecting device is provided to reuse pipes and flanges for maintenance and repair of the connected pipes and to maximize the watertight or airtight sealing effect. CONSTITUTION: A non-welding pipe connecting device comprises two pipes(100), a pair of flanges(300), a gasket(400), a ring(500), and a fastener(600). Expanded parts(200) are formed on the two pipes to increase the diameter of ends of the pipes. The flanges are split in the longitudinal direction of the expanded parts to maintain the connection and joint state of the expanded parts of the pipes. The gasket seals a gap between the pipes. The ring is fitted to the exterior of the gasket. The fastener couples the flanges together.

Description

PIPE CONNECTING DEVICE OF NON-WELDING

The present invention relates to a cost-effective pipe connection device and a pipe connection method using the same. More specifically, the present invention relates to an inexpensive pipe connection device and a pipe connection method using the same, in which the end portions of both pipes to be connected can be expanded and flanges and gaskets can be used to connect the pipes and the piped parts without welding.

In general, tubes carry fluids or gases through the interior of the tubes. Commonly used pipe connection methods include grip type devices, groove joint devices, flanged connections, direct connection of pipes and pipe grounds, and welding to the outer circumferential surface of the pipe. And a method of fitting a joint to a ring, and a method of inserting another tube into an expanded portion of one tube.

In particular, the method of directly connecting the pipe and the ground part of the pipe by welding the two pipes to be connected to each other closely and then, if the diameter of the pipe is large (more than 700 mm), the connection is made by automatic or manual welding to the inside and the outside of the close part. It was. In addition, when the diameter of the tube was small (700 mm or less), only the outer surface of the contact portion was automatically or manually welded to each other.

Figure 1a is a cross-sectional view showing a device for directly connecting the conventional pipe 10 and the ground portion of the pipe 10 by welding. As shown in FIG. 1A, the welding part 15 has a problem of stress concentration due to a fluid flowing therein, and a crack occurs in the welding part 15 when it is used for a long time. In addition, since the separate welding work had to be carried out near the welding part 15 and the welding part 15 after welding, there was a problem of reducing work efficiency due to inconvenience of work process and excessive working time. In addition, since the welding work is mainly performed in the field, it requires a separate welding function, as well as welding in the 360 ° direction along the outer circumferential surface of the pipe, so that the inconvenience of the work as well as the reliability of the welding was a problem. Therefore, there is a problem that the inconvenience of having to perform a non-destructive inspection through the X-ray during the transfer of important fluids or gases. That is, such a welding process in the process of connecting the pipe 10 and the pipe 10 increases the cost of construction, may be limited to the place when welding the site, and the risk of fire due to welding during indoor piping work There was a problem involved.

Figure 1b is a cross-sectional view showing a device for connecting by using a flange (55, 60) coupled to the outer peripheral surface of the conventional pipe (50). As shown in FIG. 1B, the method using the combined flanges 55, 60 leaks between the inner circumferential surface of the flanges 55, 60 coupled to both tubes 50 for connection and the outer circumferential surface of both tubes 50. After the prevention member 65 is inserted, both flanges 55 and 60 are coupled with the bolt 70 and the nut 75. However, this method has a problem that the flanges 55 and 60 can be pushed in the direction of one pipe 50 when the fastening force of the flanges 55 and 60 is weakened.

Therefore, there is a need for a non-contact piping system that can ensure watertightness or airtightness and can effectively cope with shock, vibration and pressure.

In addition, by providing a means to easily connect the pipe and the pipe without welding in the field to facilitate the assembly, it is possible to reuse the pipe and flange when maintaining and dismantling the connected pipe, There is a need for cost-effective piping systems that maximize watertightness or airtightness.

The present invention has been created by the above needs, the first object of the present invention is to provide a non-contact pipe connection device and pipe connection method using the same to ensure watertight or airtight, and effectively respond to shock, vibration and pressure. It is.

In addition, a second object of the present invention is to provide a cost-effective pipe connection device and a pipe connection method using the same, which can provide the convenience of assembly by providing a means for simply connecting the pipe and the pipe without welding in the field. .

In addition, a third object is to provide a non-contact type pipe connecting device capable of reusing pipes and flanges during maintenance and dismantling of connected pipes and pipe connecting methods using the same.

The object of the present invention as described above is that both ends of the tube 100 having a tube 200 is processed so that the diameter of the end of the tube 100 for connection is larger than the diameter of the original tube 100; A pair of flanges 300 divided in the longitudinal direction of the expansion pipe 200 to maintain the connection and fixing state of the expansion pipe 200 of both pipes 100 to each other; A circular gasket 400 provided between the portions to which both tubes 100 are connected to seal a gap of the connecting portion; A circular ring 500 fitted to an outer circumferential surface of the gasket 400; And fastening members 600 and 700 capable of coupling the pair of flanges 300 to each other.

In addition, the pipe 100 may be any one of a steel pipe, a nonferrous metal pipe and a PE composite pipe.

In addition, the tube 100 may be characterized in that the straight tube or elbow tube.

In addition, the expansion pipe 200 forms an angle of 20 degrees to 90 degrees with the horizontal axis in the longitudinal direction of the pipe 100, the diameter of the inner diameter of the expansion pipe 200 is processed to increase toward the end of the pipe 100 It can be characterized.

In addition, the flange 300 may be formed of at least one of stainless steel, steel, and cast iron.

In addition, the flange 300 may further include a protrusion 310 having an angled hole 330 formed on an outer circumferential surface thereof so as to be shape-fitted with the fastening members 600 and 700.

In addition, the inner circumferential surface of the flange 300 is provided with an inclined surface 320 at the same angle as the outer circumferential surface 210 of the expansion pipe 200 may be tightly coupled to the outer circumferential surface 210 of the expansion pipe 200. Can be.

In addition, the shape of the outer circumferential surface of the flange 300 may be characterized in that it can be modified according to the use, such as triangle, square and round.

In addition, the gasket 400 may be formed of any one of EPDM, nitrile, white nitrile, silicone, neoprene, fluoroelastomer, epichlorohydrin and butyl halide.

In addition, the side surface of the gasket 400 may be inclined in the direction of the outer circumferential surface of the gasket 400, the inner circumferential surface of the gasket 400 may be characterized in that formed in a concave shape.

In addition, the gasket 400 may be characterized in that the thickness protruding more than 1 mm in the thickness direction of the ring 500.

In addition, the ring 500 may be characterized in that it further comprises at least one guide 510 to prevent the separation of the ring 500 and to secure the ring 500 on the outer peripheral surface.

In addition, the thickness of the ring 500 may be characterized in that 2 mm to 50 mm.

In addition, the fastening members 600 and 700 may be composed of at least two bolts 600 and nuts 700.

In addition, the neck 610 of the bolt 600 may be formed in a shape that can be shaped to the angled hole 330 formed in the protrusion 310 of the flange 300.

The outer diameter of the bolt 600 may be 6 mm to 50 mm.

On the other hand, the object of the present invention is another category, the diameter of the end of the tube 100 for connection to be processed to be larger than the diameter of the original tube 100 to form the expansion pipe 200 in both tubes 100 step; Inserting a pair of flanges 300 on the outer circumferential surfaces of both processed tubes 100; Providing a gasket (400) in which a circular ring (500) is fitted on an outer circumferential surface between the expansion pipe portion (200) and the expansion pipe portion (200) of both pipes (100) into which the flange is inserted; And coupling the flanges 300 inserted into both pipes 100 using the fastening members 600 and 700 to each other.

In addition, the step of processing the tube 100, the step of fixing the outer peripheral surface of the tube 100 to the jig; Heating the end of the fixed tube (100); Inserting a circular guide roller into an end of the heated tube 100; Rotating the inserted guide roller 360 degrees to process the end of the tube 100 to be inclined to 20 degrees to 90 degrees with respect to the horizontal axis of the longitudinal direction of the tube 100; may be characterized.

According to one embodiment of the present invention, there is an effect that can facilitate the assembly by providing a means that can easily connect the pipe and the pipe without welding in the field.

In addition, the side of the gasket is inclined and the inner circumferential surface is concave in a U-shape to ensure watertightness or airtightness, and the neck portion of the bolt is formed in an angular shape to prevent separation and effectively cope with shock, vibration and pressure. have.

In addition, it is possible to reuse the pipe and the flange when the maintenance and dismantling of the connected pipe, and only replace the gasket when replacing the pipe connection device has the effect of reducing the replacement time and cost.

1a and 1b is a cross-sectional view showing a conventional pipe connecting device,
Figure 2 is an overall exploded perspective view showing a pipe connection device according to an embodiment of the present invention,
3a and 3b is a cross-sectional view showing the shape of the machined tube according to an embodiment of the present invention,
Figure 4 is a perspective view showing the structure of the flange according to an embodiment of the present invention,
5 is a perspective view showing the shape of a gasket according to an embodiment of the present invention;
Figure 6 is a cross-sectional view showing a gasket coupled to a circular ring according to an embodiment of the present invention,
7 is a perspective view showing the structure of the bolt according to an embodiment of the present invention,
8A and 8B are cross-sectional views illustrating a state in which the entire pipe connection apparatus is assembled according to an embodiment of the present invention.

< Pipe connection  Configuration of the device>

Figure 2 is an overall exploded perspective view showing a pipe connection device according to an embodiment of the present invention. As shown in FIG. 2, the pipe connecting device is composed of both pipes 100, flanges 300, gaskets 400, rings 500, and fastening members 600 and 700 to be connected. Hereinafter, each component is demonstrated in detail.

In the present invention, the pipe 100 may correspond to a steel pipe, a non-ferrous metal pipe and a polyethylene (PE) composite pipe in terms of materials. For example, copper pipes, aluminum pipes, iron pipes, stainless steel pipes and PE composite pipes can be carried out. In addition, the tube 100 in the present invention may correspond to a straight tube or elbow tube in shape. In addition, each pipe 100 to be connected may be used having an outer diameter of 15 mm to 1500 mm. And, each pipe 100 to be connected may be used having a thickness of 1.7 mm to 29 mm.

On the other hand, both pipes 100 to be connected are used to form an angle of 20 to 90 degrees with the horizontal axis in the longitudinal direction so as to increase the diameter of the inner diameter of the expansion pipe 200 toward the end of the pipe 100. 3a and 3b is a cross-sectional view showing the shape of the plastically processed tube according to an embodiment of the present invention. In FIG. 3A, the expansion pipe part 200 is processed to form an angle of 90 degrees with the horizontal axis in the longitudinal direction of the pipe 100. In FIG. 3B, which is another modified example, the expansion pipe part 200 is processed to form an angle of 45 degrees with the horizontal axis in the longitudinal direction of the pipe 100. The processing method of the pipe 100 will be described in detail in the following pipe 100 connection method.

The flange 300 may be formed of at least one of stainless steel, steel, and cast iron. In addition, the length of the pipe 100 into which the flange 300 can be inserted may be 30 mm or more.

Figure 4 is a perspective view showing the structure of the flange according to an embodiment of the present invention. As shown in FIG. 4, the flange 300 further includes a protrusion 310 having an angled hole 330 formed on the outer circumferential surface thereof so as to be shape-fitted with the fastening members 600 and 700. Here, by making the angled hole 330 formed in the flange 300 and the neck 610 formed in the fastening members 600 and 700 such as the bolt 600 to have the same shape, there is an advantage of preventing the play of the bolt 600. have. At this time, the number of the angular holes 330 into which the fastening members 600 and 700 are inserted is preferably formed at least two or more. In FIG. 4, the flange 300 having four angled holes 330 is illustrated as an example.

In addition, the inner circumferential surface of the flange 300 is processed to have an inclined surface 320 at the same angle as the outer circumferential surface 210 of the expansion pipe 200 to be in close contact with the outer circumferential surface 210 of the expansion pipe 200, thereby expanding the expansion pipe 200. And flange 300 to be firmly coupled. In this case, the inclined surface 320 formed on the inner circumferential surface of the flange 300 may be processed to have an angle of 20 degrees to 90 degrees with respect to the horizontal axis. It is difficult to make the inclined surface 320 90 degrees or more, and it is difficult to make the inclined surface 320 less than 20 degrees because the fastening force can be weakened.

And the shape of the outer circumferential surface of the flange 300 may be variously modified according to the use, such as triangle, square and round. Through this, there is an advantage that the connection work of the pipe 100 can be more easily performed by using the flange 300 having a different shape of the outer circumferential surface in accordance with the external environment of the place where the pipe 100 is connected. In FIG. 4, a flange 300 having a circular outer circumferential surface is shown as an embodiment.

5 is a perspective view showing the shape of a gasket according to an embodiment of the present invention. Gasket 400 includes EPDM, Nitrile, White Nitrlie, Silicon, Neoprene, Fluoro-elastomer, Epichloro-hydrin and Halogenated Butyl It may be formed of any one of (Halogenated Butyl). In the present invention, it is preferable to use the EPDM gasket 400. EPDM gasket 400 has the advantage that can be widely used in hot water, diluted acid, degreased air and various kinds of chemicals within the prescribed temperature range except for petroleum products. In addition, the gasket 400 is preferably formed of a material having cold resistance and heat resistance in the range of minus 50 degrees to the image 300 degrees.

Meanwhile, as shown in FIG. 5, the side surface of the gasket 400 is inclined toward the outer circumferential surface, and the inner circumferential surface is concave in a U-shape. The outer circumferential surface of the gasket 400 is inclined and the inner circumferential surface is concave in a U-shape, so that the U-shape becomes wider due to the hydraulic pressure of the fluid flowing into the tube 100 or the air pressure of the gas, and further on the inner circumferential surface of the tube 100. By ensuring close contact, watertight or airtight effects can be maximized.

The ring 500 may further include at least one or more guides 510 that prevent the separation of the ring 500 and fix the ring 500 on an outer circumferential surface thereof. Here, it is preferable that at least two guides 510 are installed in the symmetrical direction. And the thickness of the ring 500 can be 2 mm-50 mm.

Figure 6 is a cross-sectional view showing a gasket coupled to a circular ring according to an embodiment of the present invention. As shown in FIG. 6, when the flanges 300 are coupled to each other by the fastening members 600 and 700, the gasket 400 may be closely attached to the gasket 400 so that the gasket 400 may increase the watertight or airtight effect. It is preferable that it is the thickness which protrudes 1 mm or more in the thickness direction of (). 6 illustrates a gasket 400 having a thickness that protrudes 1 mm in the thickness direction of the ring 500 in one embodiment of the present invention.

In addition, the outer circumferential surface of the gasket 400 and the inner circumferential surface of the ring 500 are preferably bonded by using an adhesive to prevent separation from each other and to enhance the effect of watertightness or airtightness.

The fastening members 600 and 700 may include at least two bolts 600 and nuts 700. 7 is a perspective view showing the structure of the bolt according to an embodiment of the present invention. As shown in FIG. 7, the bolt 600 is a neck of the bolt 600 connected to the head of the bolt 600 to prevent play and effectively respond to the shock, vibration or pressure applied to the tube 100. The portion 610 is preferably formed in a shape that can be shaped to the angled hole 330 formed in the protrusion 310 of the flange 300. For example, the angled hole 330 may be manufactured in the shape of a triangle, a half moon or a hexagon. 7 illustrates that the neck 610 of the bolt 600 is formed in a hexagonal shape as a preferred embodiment of the present invention. On the other hand, the outer diameter of the bolt 600 is preferably 6 mm to 50 mm.

8A and 8B are cross-sectional views illustrating a state in which the entire pipe connection apparatus is assembled according to an embodiment of the present invention. 8A is a cross-sectional view illustrating a state in which the expansion tube 200 is assembled using the tube 100 processed to form an angle of 90 degrees with a horizontal axis in the longitudinal direction of the tube 100, and FIG. 8B is an expansion tube (which is another embodiment) ( 200 is a cross-sectional view showing a state assembled using the tube 100 processed to form an angle of 30 degrees with the horizontal axis of the longitudinal direction of the tube 100.

< Pipe connection  Method>

In the method of connecting the pipe 100 in the present invention, first, the diameter of the end of the pipe 100 to be connected is processed to be larger than the diameter of the original pipe 100 to expand the pipe 200 to both pipes 100. To form. The method of processing the pipe 100 will be described in detail below. Next, the flange 300 is inserted into the outer circumferential surface of the processed both tubes 100. At this time, the flange 300 is inserted so that the portion formed with the inclined surface 320 of the inner circumferential surface toward the connection portion of the tube 100, the gap between the expansion pipe 200 of the tube 100 and the inclined surface 320 of the flange 300 gap So that it can be adhered to without Next, a gasket 400 having a circular ring 500 is positioned on an outer circumferential surface between the expanded pipe portion 200 and the expanded pipe portion 200 of both the processed pipes 100. At this time, it is preferable that the ring 500 and the gasket 400 are bonded to each other using an adhesive. Finally, the flanges 300 inserted into both tubes 100 are coupled to each other by using fastening members 600 and 700. At this time, the fastening members 600 and 700 used are preferably the bolt 600 and the nut 700. The angled hole 330 formed in the flange 300 and the neck 610 of the bolt 600 are closely contacted to each other to form a shape, and then the nut 700 is tightened along the screw portion of the bolt 600 to both the tubes 100. Interconnect the flanges (300). Hereinafter, the steps of processing both pipes 100 to form the expansion pipe 200 in both pipes 100 will be described in detail.

In the step of processing the tube 100, first, the outer peripheral surface of the tube 100 is fixed to the jig. Next, the end of the fixed tube 100 is heated with a heating device. Here, the heating may be heated using a preheater, it may be heated to 40 degrees to 300 degrees using a separate heating device according to the type of the tube (100). Next, a circular guide roller is inserted into the inside of the end of the heated tube 100. Finally, by rotating the inserted guide roller 360 degrees to process the end of the tube 100 to be inclined to 20 to 90 degrees with respect to the horizontal axis of the longitudinal direction of the tube 100. In this case, the inclination angle of the expanded part 200 may be adjusted according to the thickness of the circular guide roller.

100: tube
200: expansion tube
210: outer peripheral surface of the expansion pipe
220: inner peripheral surface of the expansion pipe
300: flange
310: protrusion of the flange
320: inclined surface of the inner peripheral surface of the flange
330: angled hole in the flange
400: Gasket
500: ring
510: Guide
600: Bolt
610: Neck of the bolt
700: Nut

Claims (18)

The diameter of the end of the tube 100 for connection is greater than the diameter of the original tube 100 to form an angle of 20 to 90 degrees with the horizontal axis in the longitudinal direction of the tube 100, the diameter of the inner diameter ( Both tubes 100 having expansion tubes 200 which are machined to increase towards the ends of 100;
The protruding portion 310 is formed to be divided in the longitudinal direction of the expansion pipe 200 to maintain the connection and fixing state of the expansion pipe 200 of the two pipes 100 to each other, the angled hole 330 on the outer peripheral surface A pair of flanges 300 including;
A circular gasket (400) provided between the parts connected to both tubes (100) to seal a gap of the connection part, the side of which is inclined toward the outer circumferential surface, and the inner circumferential surface is concave in a U-shape;
A circular ring 500 fitted to an outer circumferential surface of the gasket 400; And
Includes; fastening members (600,700) consisting of at least two bolts (600) and nuts (700) capable of coupling the pair of flanges (300) to each other;
The neck (610) portion of the bolt 600 is inexpensive tube connection device, characterized in that it is formed in a shape that can be shaped to the angular hole formed in the protrusion 310 of the flange (300). The method of claim 1,
The pipe 100 is a non-ferrous pipe connection device, characterized in that any one of steel pipes, non-ferrous metal pipes and PE composite pipe. The method of claim 1,
The pipe 100 is a non-folding pipe connection device, characterized in that the straight pipe or elbow pipe. delete The method of claim 1,
The flange 300 is a non-contact type pipe connection apparatus, characterized in that formed of at least one of stainless steel, cast iron. delete The method of claim 1,
The inner circumferential surface of the flange 300 is provided with an inclined surface 320 at the same angle as the outer circumferential surface 210 of the expansion pipe 200 may be tightly coupled to the outer circumferential surface 210 of the expansion pipe 200. Cost-effective pipe joints. The method of claim 1,
The shape of the outer circumferential surface of the flange 300 is inexpensive tube connection device, characterized in that can be modified according to the use, such as triangle, square and round. The method of claim 1,
The gasket (400) is a non-contact pipe connection device, characterized in that formed of any one of EPDM, nitrile, white nitrile, silicone, neoprene, fluoroelastomer, epichlorohydrin and butyl halide. delete The method of claim 1,
The gasket 400 is a non-contact type pipe connection device, characterized in that the thickness protruding more than 1 mm in the thickness direction of the ring (500). The method of claim 1,
The ring 500 further comprises at least one guide (510) to prevent the separation of the ring (500) on the outer circumferential surface and to secure the ring (500). The method of claim 1,
The thickness of the ring 500 is a non-contact pipe connection device, characterized in that 2 mm to 50 mm. delete delete The method of claim 1,
The outer diameter of the bolt 600 is 6 mm to 50 mm non-contact type pipe joints, characterized in that. delete delete

Images