KR101134992B1 - Clamp type non-welding pipe joint using flare processing - Google Patents

Abstract

The present invention relates to a clamp-type non-welded pipe joint using flare processing, and in particular, pipes each having an end portion connected to each other to be flared and extended to form an angle of 90 °; A first gasket formed to be equal to or wider than the width of the expansion pipe of the pipe and coupled between the expansion pipe of the pipe; A second gasket formed in a ring shape and coupled to an outer surface of the expansion part of the pipe; And a ring joint in which a pair is divided to each other so that the expansion pipe portion of the pipe is inserted into the inner surface to maintain a connection and a fixed state, and an insertion groove into which the expansion pipe portion is inserted is formed on the inner surface.
According to the present invention as described above by expanding the end of the pipe to 90 ° through the flaring process, by forming an inclined surface on the outer surface of the expansion pipe, and by forming an inclined indentation surface corresponding to the inclined surface in the ring joint, the internal pressure and the outside Fluid can be safely transported even in the event of an impact or an earthquake.

Description

CLAMP TYPE NON-WELDING PIPE JOINT USING FLARE PROCESSING}

The present invention relates to a clamp-type non-welded pipe joint using flare processing, and in detail, the pipe end is extended to 90 ° through flare processing, and an inclined surface is formed on the outer surface of the expansion pipe, and an inclined surface on the ring joint. The present invention relates to a clamp-type non-welded pipe joint using flare processing to form an inclined indentation surface corresponding to the same.

Currently, pipes (eg, water and sewage pipes) connect pipes and pipes through various known methods.

The present welding-free connection scheme arranges two pipes in a row, and is fixed by a ring joint between two aligned pipes.

At this time, in order for the ring joint to be reliably seated on the pipe outer circumferential surface, protrusions formed at both ends of the ring joint are positioned in grooves formed in each pipe, so that the two pipes to be arranged in a line are not separated from each other.

In addition, in a ring joint pipe connection structure, grooves should be formed around the pipe outer circumference. This groove is usually machined through a grooving machine, which is machined to 2 mm or less to prevent deformation. The internal structure of the tubular pipe is leaked due to the ring joint being released from the grooves even with slight external bending and shaking, and it also prevents the flow of fluid flowing into the pipe and accumulates fatigue in the pipe material to increase durability. Significant decreases in degrees and elongation) are often exposed to problems (such as tearing of pipes and leakage).

Unlike the pipe connection structure described above, the ring is welded to two pipe peripheral surfaces arranged in parallel with each other in the pipe connection structure of another structure. The ring joint for joining the two pipes has concave grooves adjacent to both ends and forms another space in the center thereof. The ring welded to the two pipes to be joined is designed to be inserted into the recess of the ring joint and to clamp the ring joint so that the two pipes are not separated from each other. In addition, the space formed inside the ring joint accommodates a separate packing member to seal between two opposite pipe ends to prevent leakage of fluid flowing into the pipe.

This ring joint piping connection requires the ring to be welded on the outer circumferential surface of the ring. In order for the ring to fit into the concave groove of the ring joint, the ring position and the concave groove position must be accurately measured. When welding, the ring does not fit with the recess according to the skill of the welder. When the ring and the concave groove are not matched, it is not easy to weld the ring in place in the field, which causes a problem of causing a delay in work and a connection cost.

In order to solve this problem, Korean Utility Model Publication No. 20-0449405 (ring joint pipe connection structure) has been developed and filed.

In the ring joint pipe connection structure having one or more joint pieces in FIG. 1, in a structure for connecting between two pipes 100a and 100b arranged in a line via a ring joint 10 having a circular ring structure, Two grooves (13a, 13b) adjacent to both ends on the inner circumferential surface thereof and a ring joint (10) forming a space portion (14) in the center thereof; And a stopper 23 projecting along the outer circumference of the first end 21, the second end 22, and the second end 22 by a predetermined distance, and received in the grooves 13a and 13b. A tubular coupling unit 20 connected to a first end of the pipes 100a and 100b so as to extend in length at the pipe ends of the pipes 100a and 100b; A packing member 30 accommodated in the space 14; And a conductive wire clip (40) capable of electrically connecting the two pipes (100a, 100b) connected across the ring joint (10), wherein the coupling unit (20) is arranged in two rows. After the pipes 100a and 100b are connected to each other at opposite ends, the stoppers 23 of the two coupling units 20 adjacent to each other are concave to each other 13a of the ring joint 10. And 13b) to be connected to the pipe so as not to be separated.

However, such a ring joint pipe connection structure has a problem in that a manufacturing cost increases because a mold corresponding to the stopper is integrally formed with the pipe in the pipe manufacturing process.

The present invention is to solve the above problems, while expanding the end of the pipe to 90 ° through the flaring process, to form an inclined surface on the outer surface of the expansion pipe, the inclined indentation surface corresponding to the inclined surface in the ring joint Accordingly, an object of the present invention is to provide a clamp type weldless pipe joint using flare processing to safely transfer fluid to internal pressure, external shock, and earthquake.

In addition, another object of the present invention is to provide a clamp type weldless pipe joint using flaring to increase airtightness by inserting a gasket having an inner circumferential surface extending in a "∧" shape between the pipe and the pipe.

Features of the present invention for achieving the above object,

Pipes each having an end portion flared and interconnected to form an angle of 90 [deg.]; A first gasket formed to be equal to or wider than the width of the expansion pipe of the pipe and coupled between the expansion pipe of the pipe; A second gasket formed in a ring shape and coupled to an outer surface of the expansion part of the pipe; And a ring joint in which a pair is divided to each other so that the expansion pipe portion of the pipe is inserted into the inner surface to maintain a connection and a fixed state, and an insertion groove into which the expansion pipe portion is inserted is formed on the inner surface.

Here, the pipe is formed with an inclined surface having a downward slope at the upper end of the outer surface of the expansion pipe portion.

Here, the first gasket is inclined in the direction of the outer circumferential surface, the groove is formed in the inner peripheral surface is concave in a U-shape.

Here, the second gasket is formed in the form of a "shaped" cross section, and is coupled to the upper end of the expansion portion of the pipe.

Here, the ring joint is formed in a "U" shape at one end, the first fastening jaw is provided with a pinhole protruding, the first hinge jaw is provided with a first hinge hole at the other end is formed A first ring joint; A second fastening jaw having a “U” shape protrudes from one end thereof to correspond to the first fastening jaw of the first ring joint, and a second hinge to correspond to the first hinge jaw of the first ring joint at the other end thereof. A second ring joint having a hole formed with a pair of second hinge jaws projectingly hinged to the first ring joint; And a lower end of the fastening bolt fixed to the first fastening jaw of the first ring joint by a pin so as to press the first fastening jaw and the second fastening jaw together.

Here, the insertion groove of the ring joint has a space portion formed so that the two gaskets are inserted in the upper end portion, a first inclined indentation surface extending outward from the end of the space portion is formed in the stop portion, the lower end portion is the second A second inclined indentation surface is formed which extends outward from the end of the inclined surface.

Here, the ring joint is increased in thickness so that the lower end of the outer surface reinforces the strength as the first inclined indentation surface and the second inclined indentation surface expand.

According to the clamp-type non-welded pipe joint using the flaring process of the present invention configured as described above, the end of the pipe is extended to 90 ° through the flaring process, but the inclined surface is formed on the outer surface of the expansion pipe, the inclined surface on the ring joint By forming the inclined indentation surface corresponding to the internal fluid, it is possible to safely transport the fluid to the external shock and earthquake.

In addition, according to the present invention, the airtightness can be increased by inserting a gasket having an inner circumferential surface extending in a "∧" shape between the pipe and the pipe.

1 is a cross-sectional view showing a conventional ring joint pipe connection structure.
Figure 2 is a perspective view showing the configuration of a clamp type weldless pipe joint using flaring according to the present invention.
3 is an exploded perspective view showing the configuration of a clamp type weldless pipe joint using flaring according to the present invention.
Figure 4 is a partially enlarged perspective view showing the configuration of the ring joint of the clamp type non-welded pipe joint using the flaring process according to the present invention.
5 is a cross-sectional view showing the configuration of a pipe in a clamp type weldless pipe joint using flaring according to the present invention.
6 is a cross-sectional view showing the configuration of a first gasket of the clamp type weldless pipe joint using flaring according to the present invention.
7 is a cross-sectional view showing the configuration of a second gasket in the clamp type weldless pipe joint using flaring according to the present invention.
8 is a cross-sectional view showing the configuration of a ring joint in a clamp type weldless pipe joint using flaring according to the present invention.
9 is a cross-sectional view in the engaged state of the clamp-type non-welded pipe joint using flaring according to the present invention.
10 to 12 are explanatory views for explaining the coupling process of the clamp-type non-welded pipe joint using the flaring process according to the present invention.

Hereinafter, with reference to the accompanying drawings, the configuration of a clamp-type non-welded pipe joint using a flaring process according to the present invention will be described in detail.

In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. The following terms are defined in consideration of the functions of the present invention, and may be changed according to the intentions or customs of the user, the operator, and the like. Therefore, the definition should be based on the contents throughout this specification.

Figure 2 is a perspective view showing the configuration of the clamp-type non-welded pipe joint using the flaring process according to the present invention, Figure 3 is an exploded perspective view showing the configuration of the clamp-type non-welded pipe joint using the flaring process according to the present invention. 4 is a partially enlarged perspective view showing the configuration of a ring joint in a clamp type weldless pipe joint using flaring according to the present invention, and FIG. 5 is a clamp type weldless pipe joint using flaring according to the present invention. 6 is a cross-sectional view showing the configuration of the pipe, Figure 6 is a cross-sectional view showing the configuration of the first gasket of the clamp-type non-welded pipe joint using the flare processing according to the present invention, Figure 7 is a clamp type using the flare processing according to the present invention Sectional drawing which shows the structure of the 2nd gasket of a non-welding piping joint, FIG. 8 is a plug which concerns on this invention. A cross-sectional view showing the configuration of a joint of the ring clamp-type non-welded pipe joints using a control processing, Figure 9 is a cross-sectional view of the coupling state of the clamp type, solid welded pipe joints using a flare process according to the invention.

2 to 9, the clamp type weldless pipe joint 100 using the flaring process according to the present invention includes a pipe 110, a first gasket 120, a second gasket 130, and the like. , Ring joint 140.

First, the pipe 110 is a straight pipe or elbow pipe of any one material of steel pipes, non-ferrous metal pipes and PE composite pipe, each end of the interconnected flare is expanded to form an angle of 90 °, expansion pipe 111 An inclined surface 113 having a downward inclination is formed at the upper end of the outer surface.

And, the first gasket 120 is formed in a ring shape, as shown in Figure 6, is coupled to the inner surface of the expansion portion 111 of the pipe 110, the inner surface is inclined toward the outer peripheral surface, the inner peripheral surface is The groove 121 is formed to be concave in the shape of a "∧". Here, the material of the first gasket 120 is rubber, EPDM, Nitrile, White Nitrlie, Silicon, Neoprene, Fluoro-elastomer, Epichloro High It is preferably formed of any one of the material (Epichloro-hydrin) and halogenated butyl (Halogenated Butyl).

In addition, the second gasket 130 is formed in a ring shape as shown in Figure 7, the cross section is formed in the "shaped" shape is coupled to the outer surface of the expansion portion 111 of the pipe 110. Here, the material of the second gasket 130 is rubber, EPDM, Nitrile, White Nitrlie, Silicon, Neoprene, Fluoro-elastomer, Epichloro High It is preferably formed of any one of the material (Epichloro-hydrin) and halogenated butyl (Halogenated Butyl).

In addition, the ring joint 140 is made of at least one material of stainless steel, steel, and cast iron, the pair is divided into each other so that the expansion portion 111 of the pipe 110 is inserted into the inner surface to maintain the connection and fixing state. Is formed, the insertion groove 141 is inserted into the expansion tube 111 is formed on the inner side.

Here, the ring joint 140 is formed in a "U" shape at one end as shown in Figures 3 and 4, the first fastening step (143a) having a pinhole 143b is formed protruding, The first ring joint 143 which protrudes from the first hinge jaw 143d having the first hinge hole 143c at the other end, and the first fastening jaw 143a of the first ring joint 143 at one end thereof. The second fastening jaw 145a having a “U” shape is formed to protrude, and the second hinge hole 145b is formed to correspond to the first hinge jaw 143d of the first ring joint 143 at the other end thereof. The formed second pair of hinge jaws 145c protrude to form a second ring joint 145 hinged to the first ring joint 143, and the lower end of the first fastening jaw of the first ring joint 143 It is fixed to the 143a so as to be rotatable by the pin 147a, and consists of a fastening bolt 147 for pressing the first fastening jaw 143a and the second fastening jaw 145a mutually.

Here, the insertion groove 141 of the ring joint 140 is formed with a space portion 141a such that the second gasket 130 is inserted into the upper end portion as shown in FIG. 8, and the space portion 141a at the stop portion. The first inclined indentation surface (141b) is formed to extend outward from the end of the), the second inclined indentation surface (141c) is formed to extend outward from the end of the first inclined indentation surface (141b), It is preferable that the thickness of the lower side surface is increased so as to reinforce the strength according to the formation of the first inclined indentation surface 141b and the second inclined indentation surface 141c.

Hereinafter, with reference to the accompanying drawings, the assembly process and operation of the clamp-type non-welded pipe joint using the flaring process according to the present invention will be described in detail.

10 to 12 are explanatory views for explaining the coupling process of the clamp-type non-welded pipe joint using the flaring process according to the present invention.

First, in order to form the expansion pipe 111 of the pipe 110, a flare process is performed. First, the outer circumferential surface of the pipe 110 is fixed to the jig. Next, the end of the fixed pipe 110 is heated by a heating device. Here, the heating may be heated using a preheater, it may be heated to 40 ℃ to 300 ℃ using a separate heating device according to the type of pipe 110. Next, a circular guide roller is inserted into the inside of the end of the heated pipe 110. Finally, by rotating the inserted guide roller 360 ° to process the end of the pipe 110 to be inclined to 90 ° with respect to the horizontal axis of the longitudinal direction of the pipe 110 to the inclined surface 113 having a downward slope to the upper end surface The expansion tube 111 formed is formed.

 At this time, the angle θ of the inclined surface 113 is formed as in Equation 1 below.

Here, t0 is the thickness of the steel pipe and t1 is the thickness of the expansion pipe.

Meanwhile, as shown in FIG. 10, the expansion pipe 111 of the pipe 110 is positioned to correspond to each other in a state in which the expansion pipe 111 is formed in the pipe 110, and the first gasket 120 is disposed therebetween. Insert and couple the second gasket 130 to the outside of the expansion portion 111 of the pipe 110.

Then, the expansion portion 111 and the second gasket 130 is positioned on the second inclined press-in surface 141c formed in the insertion groove 141 of the ring joint 140 of the second ring joint 145. The fastening bolt 147 is rotated in the second fastening jaw 145a to be inserted into the first fastening jaw 143a of the first ring joint 143, and then the fastening bolt 147 is fastened.

As shown in FIG. 11, when the fastening bolt 147 is continuously fastened, the first ring joint 143 and the second ring joint 145 form a circular shape, and the insertion groove 141 descends, that is, the expansion pipe 111. And the second gasket 130 is inserted into the space portion 141a formed in the insertion groove 141, and the end of the space portion 141a is moved along the inclined surface 113 formed in the expansion pipe 111. At the same time, the expansion unit 111 and the first gasket 120 and the second gasket 130 are consolidated.

As shown in FIG. 12, if the bolt is continually fastened, the bolt is continually fastened so that the first gasket 120 and the second gasket 130 are compressed to seal the expansion portion 111.

On the other hand, the first gasket 120 is further in close contact with the inner circumferential surface of the pipe 110 by the groove "121" shape formed in the first gasket 120, the groove by the pressure generated during the flow of the fluid As the 121 is opened, it maximizes the watertight or airtight effect.

As those skilled in the art would realize, the described embodiments may be modified in various ways, all without departing from the spirit or scope of the present invention. It is to be understood, however, that the present invention is not limited to the specific forms referred to in the description, but rather includes all modifications, equivalents, and substitutions within the spirit and scope of the invention as defined by the appended claims. Should be.

110: pipe 120: first gasket
130: second gasket 140: ring joint

Claims (7)

Pipes each having an end portion connected to each other to be flared and expanded to form an angle of 90 °, and having an expansion pipe portion, and an inclined surface having a downward slope at an upper end of the outer surface of the expansion pipe portion;
A first gasket which is formed to be equal to or wider than the width of the expansion pipe portion of the pipe and is coupled between the expansion pipe portions of the pipe, the side surface of which is inclined in an outer circumferential direction, and the groove formed in a concave groove in an inner circumferential surface thereof;
A second gasket formed in a ring shape, the cross section being formed in a “dental” shape and coupled to an upper end of an expansion part of the pipe; And
A pair is divided into each other so that the expansion pipe portion of the pipe is inserted into the inner surface to maintain the connection and fixing state, and an insertion groove into which the expansion pipe portion is inserted is formed on the inner surface, and the space portion is inserted so that the two gaskets are inserted at the upper end thereof. And a first inclined press-fitting surface extending outwardly from the end of the space portion to the stop portion, and a second inclined press-fitting surface extending outwardly from the end of the second inclined surface is formed, and the lower end of the outer surface is formed. The thickness of the first inclined indentation surface and the second inclination indentation surface is formed to increase its strength so as to reinforce its strength, and is formed in a “U” shape at one end, and the first fastening jaw having a pinhole protrudes. And a first ring joint in which a first hinge jaw having a first hinge hole is formed at the other end thereof protrudes, and a “U” shape to correspond to the first fastening jaw of the first ring joint at one end thereof. A second fastening jaw protrudes, and a pair of second hinged jaws formed with a second hinge hole to protrude from the other end thereof to correspond to the first hinge jaw of the first ring joint is hinged to the first ring joint. The ring joint is composed of a second ring joint and a lower end of the fastening bolt is fixed to the first fastening jaw of the first ring joint by a pin so as to mutually press the first fastening jaw and the second fastening jaw Clamp-type non-welded piping joints using flare processing, characterized in that it comprises. delete delete delete delete delete delete

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