KR102253735B1 - Flange for coupling pipe - Google Patents

Abstract

The present invention relates to a flange for pipe connection, which makes a double injection structure of a support part and a packing body to prevent a packing part from being curled and sufficiently prevents the separation of the support part from the packing body, and provides sufficient internal pressure of a fluid receiving part with respect to protrusions on the inner periphery to the protrusions, thereby making the leakage due to the connection of a pipe and the flange by the internal pressure acting on the fluid receiving part rigid.

Description

Flange for coupling pipe

The present invention relates to a flange for pipe connection, and more particularly, to a flange for pipe connection that is used for connection of pipes to prevent leakage.

In general, for transport of exhaust gas, a metal pipe having excellent corrosion resistance with respect to toxicity or corrosiveness of exhaust gas and having strength enough to prevent contamination or leakage is mainly used.

In semiconductor manufacturing processes or chemical facility factories, chemical substances with strong acidity or alkalinity are transported together with corrosive gases, and thus special piping facilities with excellent chemical resistance, heat resistance, and durability are required.

Accordingly, piping equipment including metal pipes to which a coating layer made of a Teflon material is applied to the inner surface of the metal pipe or a method of forcibly inserting a thermoplastic resin pipe is used.

On the other hand, in piping equipment, a flange to which a clamp is applied is sometimes used to connect pipes. As a prior art for this, there is a flange for pipe connection disclosed in Patent Registration No. 10-1330452.

The flange for piping connection prevents leakage due to curling of the packing part for the pipe that is inserted and joined from the opposite side of the clamp among both pipes connected to both sides of the flange, and the packing part receives the pressure of the fluid flowing through the pipe and packs it. A fluid receiving part is provided to maintain pressure, and a support part is provided to prevent curling of the packing part when the pipe is first entered.

Such a flange for pipe connection provides a structure that is faithful to the connection of pipes, prevents fluid leakage, and has the advantage of a support part that prevents curling of the packing part when installing the pipe, but the packing body and the support part are double injection. As they are combined, there is a possibility that the packing body and the support of the pipe will be separated by pipe friction.

One pipe is connected to the pipe connection flange on the clamp side, and another pipe is inserted on the opposite side of the packing part, so the support part that prevents curling of the packing part when another pipe enters the packing part is excessively bent by the pipe. In this case, the support part may be separated from the packing part side, and there is a possibility that other problems may occur due to the separation of the packing part and the support part afterwards.

The fluid receiving portion of the flange for pipe connection is formed in a space that is narrower than the first as the inner peripheral portion of the packing portion is pressurized by the pipe, and is provided so that the pressure acts on the inner peripheral portion contacting the pipe by creating an internal pressure according to the inflow of the fluid. .

The inner circumferential portion is provided with a plurality of protrusions having teeth toward the pipe, and the plurality of protrusions are configured to contact the pipe by receiving an internal pressure acting on the fluid receiving portion.

The fluid receiving portion has a cross-sectional shape in which the bottom portion gently protrudes so as to mainly apply pressure toward the central portion side of the plurality of tooth-shaped protrusions in the inner peripheral portion. Accordingly, since the protrusions in the central part of the plurality of tooth-shaped protrusions receive a lot of internal pressure, the pressure distribution is concentrated in the central part, and the pressure applied by both protrusions in the center is relatively weak, so that fluid leakage due to the protrusions is sufficiently prevented. There were some difficult aspects.

Korean Registered Patent Publication No. 10-1330452

The present invention has sufficiently studied and improved the existing problems as described above, and sufficiently prevents separation of the support from the packing body by making the support for preventing curling of the packing and the double injection structure of the packing body. It is to provide a flange for a pipe connection that sufficiently prevents leakage due to the connection between the pipe and the flange by the internal pressure acting on the fluid receiving part by sufficiently providing the internal pressure of the fluid receiving part to the protrusions.

The flange for pipe connection according to the present invention for solving the above problem includes: a housing provided with receiving portions on both sides so that a plurality of pipes are accommodated and connected to both sides; And a packing part provided between the outer circumferential surface of the pipe and the inner circumferential surface of the receiving part to form a watertight structure, wherein the packing part is formed with a fluid receiving part for receiving a fluid moving in the pipe, and is connected to the ring-shaped outer circumferential part and the outer circumferential part. A packing body including an inner circumferential portion forming a receiving portion; And a support part disposed in front of the packing body in a direction in which the pipe enters, and contacting an outer circumferential surface of the pipe when the pipe first enters toward the packing body to prevent curling of the packing body, and a first A flow path groove is formed, a second flow path groove is formed in the inner circumference, the first flow path groove and the second flow path groove form a flow path toward the fluid receiving part, and the inner circumference of the packing body is in contact with the pipe. As a pipe connection flange including a plurality of contact protrusions having teeth inclined in one direction, the packing body and the support part have a structure in which the packing body and the support part are coupled to each other by double injection, and the inside of the fluid receiving part corresponds to the plurality of contact protrusions. Convex corrugated protrusions for applying internal pressure are provided, and the plurality of contact protrusions and corrugated protrusions are formed on an outer surface of the inner circumferential portion.

One of the packing body and the support part is provided with a coupling protrusion for male and female coupling, and the other is provided with a defect groove corresponding to the coupling protrusion, and the coupling protrusion and the coupling groove are arranged at predetermined angular intervals along the circumferential direction. proper.

The coupling protrusion is provided on the support, the coupling groove is provided on a side wall of the packing body, and the coupling protrusion and the coupling groove may have an isosceles trapezoidal shape.

The corrugated protrusions have a large central portion and small ends on both sides, and are preferably disposed on the outer surface of the inner circumferential portion.

A plurality of carbon composite fibers may be included as a core material in the outer circumferential portion and the inner circumferential portion of the packing body of the packing unit.

The present invention may further include an annular slip packing provided at the lower end of the support and in airtight contact with the pipe.

It is appropriate that the present invention further includes an annular rim disposed by triple injection into the packing body and the support portion so as to connect the upper outer wall portion of the packing body and the support portion.

The present invention described above, by making the double injection structure of the packing body and the support part for preventing curling of the packing part sufficiently prevents the separation of the support part from the packing body, and the fluid receiving part for the protrusions in the inner circumferential part By sufficiently providing the internal pressure to the protrusions, it is possible to provide a flange for pipe connection that firmly prevents leakage due to the connection between the pipe and the flange by the internal pressure acting on the fluid receiving portion.

1 is a cross-sectional view in which a pipe is installed on a flange for pipe connection according to an embodiment of the present invention.
2 is an enlarged view of the packing part of FIG. 1.
3 is a diagram illustrating a state in which a pipe acting on a packing part in FIG. 1 enters.
4 is an enlarged cross-sectional view of a packing portion of a flange for pipe connection according to another embodiment of the present invention.
5 is an enlarged cross-sectional view of a packing portion of a flange for pipe connection according to another embodiment of the present invention.

Hereinafter, various embodiments of the present invention will be described with reference to specific embodiments shown in the accompanying drawings. Differences in the embodiments are not mutually exclusive and should be understood in a complex manner, and without departing from the spirit and scope of the present invention, specific shapes, structures, and characteristics described in relation to the embodiments are implemented in other embodiments. Can be.

The position or arrangement of individual components according to the embodiments of the present invention is changeable and should be understood as a combination of the drawings, and similar reference numerals in the drawings may indicate the same or similar functions over various aspects, and length, area, and thickness. The etc. may be exaggerated and expressed for convenience in description.

Each unit, module, part, member, or arbitrary structure in which sub-elements are not described is assumed to include or can include common sub-elements for each having a given function, and is limited to sub-elements or detailed structures shown in the drawings. I don't do it. Components that have been shown but are not described in general, are to be understood as being inherent in the detailed description of the embodiments.

A pipe connection flange according to an embodiment having high practical implementation and high industrial applicability among various embodiments of the present invention will be described with reference to the conventional matters as described above.

Hereinafter, the main components of the flange for pipe connection according to an embodiment of the present invention will be described based on the drawings.

1 is a cross-sectional view of a pipe installed on a flange for pipe connection according to an embodiment of the present invention, FIG. 2 is an enlarged view of the packing part of FIG. 1, and FIG. 3 is a state diagram in which a pipe acting on the packing part in FIG. 1 enters to be.

1 to 3, a flange for connecting a pipe according to an embodiment of the present invention includes a housing 100 provided with accommodating portions 101 on both sides so that a plurality of pipes 10 are accommodated and connected to both sides, And packing portions 110 and 130 provided between the outer circumferential surface of the pipe 10 and the inner circumferential surface of the receiving portion 101 to form a watertight structure.

The housing 100 has a cylindrical shape and connects the pipes 10 disposed on both sides, and the pipe 10 is inserted into and coupled to the receiving portion 101 having the packing portions 110 and 130, and the packing portion The pipe 10 is coupled to the other receiving portion 101 without (110, 130) by welding or the like.

The packing parts 110 and 130 in the housing 100 are in close contact with the pipe 10 as the pipe 10 is inserted, thereby preventing leakage through a gap between the pipe 10 and the inner wall portion of the housing 100. Another annular packing ring 140 is further disposed in the housing 100.

In the housing 100, annular grooves 105 for arranging the packing parts 110 and 130 and the packing ring 140 are formed. The arrangement structure of the housing 100, the packing parts 110 and 130, and the packing ring 140 has been described in detail in the prior art described above, and may be referred to.

The flange for pipe connection according to this embodiment is due to the double injection of the support part 130 and the packing part 110, 130 for preventing curling of the packing parts 110 and 130 that may occur in the existing pipe connection flange. Separability and coupling of the pipe 10 to the flange by accurately matching the internal pressure in the fluid receiving part 115 of the packing parts 110 and 130 to the plurality of contact protrusions 122 of the packing parts 110 and 130 It is to block the leakage at the time.

The packing parts 110 and 130 are mounted on the annular groove part 105 of the housing 100 to prevent fluid leakage of the coupled pipe 10, and a packing body composed of an outer circumferential part 111 and an inner circumferential part 112 ( 110) and a support 130 coupled to the packing body 110.

The packing body 110 is formed with a fluid receiving portion 115 that accommodates the fluid moving in the pipe 10, and is connected to the ring-shaped outer peripheral portion 111 and the outer peripheral portion 111 to form the fluid receiving portion 115 It includes the inner peripheral portion 112.

The packing body 110 of the packing parts 110 and 130 is made of a material that is sufficiently close to the outer surface of the pipe 10 and the annular groove part 105 of the housing 100 so as to be watertight or airtight. A material such as Teflon may be used, but is not limited thereto. On the other hand, the support part 130 of the packing parts 110 and 130 may be made of a hard material to increase elasticity.

The packing body 110 is an annular shape that can be attached to the annular groove 105 of the housing 100 and is integrally formed by injection molding, and protrusions for adhesion performance are provided to the outer circumferential part 111 and the inner circumferential part 112. will be.

The packing body 110 has a first flow path groove 116 formed in the outer circumferential part 111, a second flow path groove 117 is formed in the inner circumferential part 112, and the first flow path groove 116 and the second flow path The groove 117 forms a flow path toward the fluid receiving portion 115, the inner peripheral portion 112 is in contact with the pipe 10, and includes a plurality of contact protrusions 122 having teeth inclined in one direction.

The packing parts 110 and 130 are provided with a fluid receiving part 115 capable of receiving a fluid flowing between the pipe 10 and the inner wall of the housing 100 while being in close contact with the pipe 10. Internal pressure is generated in the receiving part 115, and the outer circumferential part 111 and the inner circumferential part 112 are in close contact with the annular groove 105 and the pipe 10 of the corresponding housing 100 to prevent fluid leakage.

One side of the packing body 110 has an annular shape, and when the pipe 10 enters the interior of the housing 100, a support part that prevents curling of the packing body 110 due to friction with the packing body 110 ( 130) is provided.

This support 130 is disposed in front of the packing body 110 in the direction in which the pipe 10 enters, and when the pipe 10 first enters toward the packing body 110, it contacts the outer circumferential surface of the pipe 10 Prevents curling of the packing body 110.

When the pipe 10 is moved while in contact with the inner circumferential portion 112 of the packing body 110, the packing body 110 may be rotated while tilting in one direction when entering the housing 100. ) Is prevented by contacting the pipe 10 side.

The packing body 110 and the support part 130 have a structure in which male and female are coupled by double injection, and a convex wave protrusion for applying an internal pressure corresponding to the plurality of contact protrusions 122 inside the fluid receiving part 115 ( 121 are provided, and the plurality of contact protrusions 122 and the corrugated protrusions 121 are formed on the outer surface of the inner circumferential portion 112.

When the pipe 10 applies friction to the inner peripheral part 112 of the packing body 110, the packing body 110 is rotated and caught in the annular groove part 105, and the support part 130 is contacted and supported by the pipe 10. In, a tensile stress is generated in the connection portion between the packing body 110 and the support 130. Accordingly, there is a possibility that the connection portion between the packing body 110 and the support part 130 is easily separated if it is connected by double injection on a flat surface.

One of the packing body 110 and the support 130 according to the present embodiment is provided with a coupling protrusion 131 for male and female coupling, and the other is provided with a coupling groove 132 corresponding to the coupling protrusion 131 Doe, the coupling protrusion 131 and the coupling groove 133 are disposed at a predetermined angular interval along the circumferential direction.

The coupling protrusion 131 is provided in the support 130, the coupling groove 133 is provided on the side wall of the packing body 110, but the coupling protrusion 131 and the coupling groove 133 may have an isosceles trapezoid shape. have.

In this way, the packing body 110 and the support part 130 are rigidly connected to the coupling protrusion 131 having a trapezoidal shape and the coupling groove 133, so that when entering the housing 100 of the pipe 10, the mutual Separation can be sufficiently prevented. In the double injection process, after the support part 130 is first formed, the packing body 110 may be formed while having a coupling groove part 133 corresponding to the coupling protrusion 131 while contacting the support part 130. Conversely, assuming a case where the coupling protrusion 131 is formed on the packing body 110, the packing body 110 may be formed first and the support 130 may be connected.

On the other hand, the pipe 10 sufficiently enters the interior of the housing 100 so as to be in close contact with the packing parts 110 and 130 and the other packing ring 140, and the pipe 10 is coupled to the opposite side, according to the present embodiment. After the flange for pipe connection according to the pipe 10 is connected, when the fluid is supplied to the pipe 10 and flows normally, the fluid flows into the housing 100 and is packed through the other packing ring 140. Fluid may enter the body 110.

The packing body 110 is a state in which the contact protrusions 122 of the inner circumferential part 112 are in close contact with the pipe 10 so that the inner circumferential part 112 is bent and moved toward the outer circumferential part 111, and the outer circumferential part 111 and the inner circumferential part ( A fluid receiving portion 115 for accommodating a fluid is provided between 112. The fluid receiving part 115 has a structure in which fluid flows through the flow paths of the first flow path groove 116 and the second flow path groove 117, and an internal pressure of the fluid acts on the fluid receiving part 115. Accordingly, the contact protrusions 122 of the inner circumferential portion 112 are in close contact with the pipe 10.

The corrugated protrusions 121 of the inner circumferential part 112 are made so that the internal pressure toward the protrusions in the fluid receiving part 115 is concentrated toward the contact protrusions 122, and has a large central portion and small ends on both sides thereof, and the inner circumferential portion ( 112) is appropriately placed on the outer surface.

The internal pressure acting on the corrugated protrusions 121 is concentrated toward the contact protrusions 122 in the inclined lower part of the corrugated protrusions 121. One corrugated protrusion 121 is disposed corresponding to one contact protrusion 122, so that the internal pressure of the fluid receiving portion 115 acting on the corrugated protrusions 121 is directed to the contact protrusions 122, and the contact protrusion ( 122) has improved adhesion on the outer circumferential surface of the pipe 10.

4 is an enlarged cross-sectional view of another packing part of a flange for pipe connection according to another embodiment of the present invention.

Referring to FIG. 4, a plurality of carbon composite fibers 150 may be included as a core material in the outer circumferential portion 111 and the inner circumferential portion 112 of the packing body 110 of the packing portions 110 and 130.

The carbon composite fiber 150, which is stronger than steel by weight, can be inserted and disposed in the packing body 110, and can strengthen the stiffness in the circumferential direction of the packing parts 110 and 130, and is injection-molded. It serves to firmly maintain the annular shape of the manufactured packing parts 110 and 130.

According to another embodiment, an annular slip packing 155 in airtight contact with the pipe 10 is provided at the lower end of the support 130.

The slip packing 155 preliminarily blocks fluid leakage between the support part 130 and the pipe 10, and the slip packing 155 is a pipe 10 so as to be in close contact with the pipe 10 when a fluid pressure is applied. It has a shape that stretches thinly to the side.

According to another embodiment, the annular rim 157 may be triple-injected into the packing body 110 and the support part 130 so as to connect the packing body 110 and the upper outer wall of the support part 130 to be disposed.

The annular rim 157 is disposed so as not to protrude while surrounding the outer circumferential portion 111 of the packing body 110 and the support portion 130, thereby strengthening the bonding force between the packing body 110 and the support portion 130, and the packing body 110 It serves to firmly maintain the annular shape of the and support portion 130.

Such an annular rim 157 may be provided with a material having medium elasticity with respect to the packing body 110 and the support part 130, and packing after manufacture by ejection injection of the packing body 110 and the support part 130 It may be added to the outer peripheral portion 111 of the body 110 and the support portion 130.

5 is an enlarged cross-sectional view of another packing portion of a flange for pipe connection according to another embodiment of the present invention.

Referring to FIG. 5, a leak detection sensor 160 such as a gas sensor or a pressure sensor capable of detecting a leakage of fluid toward the support 130 may be installed in the housing 100. The leakage detection sensor 160 may pass through the housing 100 and may be disposed between the packing body and the support 130.

Although the embodiments of the present invention have been described as above, based on this, if a person of ordinary skill in the relevant technical field does not depart from the essential technical idea of the present invention described in the claims, the addition or modification of components Various modifications and changes may be made to the present invention by deletion or addition, and this is also included within the scope of the present invention.

10: pipe
100: housing 101: receiving portion
105: annular groove 110: packing body
111: outer periphery 112: inner periphery
115: fluid receiving portion 116: first flow path groove
117: second flow path groove 121: corrugated protrusion
122: contact protrusion 130: support
131: coupling protrusion 133: coupling groove
140: packing ring 150: elastic composite fiber
155: slip packing 157: annular border
160: leak detection sensor

Claims (7)

A housing provided with accommodating portions on both sides so that a plurality of pipes are accommodated and connected to both sides; And a packing part provided between the outer circumferential surface of the pipe and the inner circumferential surface of the receiving part to form a watertight structure,
The packing part includes a packing body including a fluid receiving part for receiving fluid moving in the pipe, and including a ring-shaped outer circumference and an inner circumferential part connected to the outer circumferential part to form a fluid receiving part; And a support disposed in front of the packing body in a direction in which the pipe enters, and contacting an outer circumferential surface of the pipe when the pipe is first entered toward the packing body to prevent curling of the packing body,
A first flow path groove is formed in the outer circumferential portion, and a second flow path groove is formed in the inner circumferential portion, wherein the first flow path groove and the second flow path groove form a flow path toward the fluid receiving portion,
As a pipe connection flange including a plurality of contact protrusions having a tooth shape inclined in one direction and in contact with the inner periphery of the packing body,
The packing body and the support part have a structure in which male and female are combined by double injection,
Convex corrugated protrusions for applying an internal pressure corresponding to the plurality of contact protrusions are provided inside the fluid receiving part,
The plurality of contact protrusions and the corrugated protrusions are formed on the outer surface of the inner circumferential portion, the corrugated protrusions are formed with a large central portion on the outer surface of the inner circumferential portion and small both sides,
A plurality of carbon composite fibers are included as a core material in the outer periphery and inner periphery of the packing body of the packing part,
A flange for pipe connection, characterized in that it further comprises an annular slip packing provided at a lower end of the support part and in airtight contact with the pipe. The method of claim 1,
One of the packing body and the support part is provided with a coupling protrusion for male and female coupling, and the other is provided with a defect groove corresponding to the coupling protrusion, and the coupling protrusion and the coupling groove are arranged at predetermined angular intervals along the circumferential direction. Flange for pipe connection, characterized in that. The method of claim 2,
The coupling protrusion is provided on the support, the coupling groove is provided on a side wall of the packing body, and the coupling protrusion and the coupling groove have an isosceles trapezoidal shape. delete delete delete The method of claim 1,
Flange for pipe connection, characterized in that it further comprises an annular rim disposed by triple injection to the packing body and the support portion so as to connect the upper outer wall portion of the packing body and the support portion.

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