WO2023096018A1

WO2023096018A1 - Pipe connection device

Info

Publication number: WO2023096018A1
Application number: PCT/KR2021/019721
Authority: WO
Inventors: 허진수
Original assignee: 주식회사 에트마
Priority date: 2021-11-24
Filing date: 2021-12-23
Publication date: 2023-06-01
Also published as: JP7289905B2; KR102455136B1; JP2023077362A

Abstract

A pipe connection device is provided. The pipe connection device comprises a body, a nut and a ferrule. The body, the nut and the ferrule accommodate a pipe having a predetermined outer diameter. The ferrule is an integrated ferrule including a ferrule front part, a ferrule rear part, and a ferrule center part between the ferrule front part and the ferrule rear part. The thickness of the ferrule center part is thinner than the thickness of the ferrule front part and the ferrule rear part, the ferrule has an inner diameter that becomes larger toward the ferrule center part from the ferrule front part and the ferrule rear part, and the ferrule has, at each outer periphery between the ferrule front part and the ferrule center part and between the ferrule rear part and the ferrule center part, a circular arc reinforcing part for alleviating deformation of the ferrule.

Description

pipe fittings

The present invention relates to a pipe connecting device, and more particularly, to a slide type pipe connecting device having a simple structure and excellent sealing properties.

Pipe connecting devices are used to interconnect two or more pipes at home or at industrial sites, or to connect pipes and other parts. The pipe is formed of metal or synthetic resin, and liquid or gas is transported through the pipe. In order to transport liquid and gas over a long distance, two or more pipes must be connected to each other using a joint. In order to prevent leakage of liquid or gas, the joint device requires excellent sealing performance. The joint device must be designed to withstand internal pressure and external impact.

A typical slide type pipe connection device is composed of a body, a nut and a ferrule. There is a bite-type structure using one ferrule and a lock-type structure using two ferrules. The bite-type structure using one ferrule has weak sealing properties and is vulnerable to internal pressure and external impact. Therefore, a lock type structure using two ferrules is mainly used for high-pressure liquid transfer or gas transfer.

1 shows a conventional lock-type pipe connection device. A conventional lock-type pipe connection device is composed of a body 100, a nut 200, a first ferrule 310, and a second ferrule 320. The body 100 and the nut 200 are fastened by screwing, and the first ferrule 310 and the second ferrule 320 are inserted between the body 100 and the nut 200 to seal the coupling portion.

During the assembly process, a pipe (not shown) is inserted through the first ferrule 310 , the second ferrule 320 and the nut 200 . Subsequently, after inserting the end of the pipe into the body 100, the nut 200 and the body 100 are screwed together. The first ferrule 310 has a trapezoidal cross section and performs a sealing function, and the second ferrule 320 serves to fix the first ferrule 310 inside the nut 200 . This lock-type pipe connection device has excellent sealing properties, but has a complicated structure, is cumbersome to assemble, and is expensive.

An object of the present invention is to provide a pipe connection device having a simple structure and excellent sealing properties.

The problem to be solved by the present invention is not limited to the problems mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, the present invention provides a pipe connection device. This tubing fitting may include a body, nut and ferrule. The body, nut and ferrule can accommodate tubing having a predetermined outer diameter. The ferrule may be an integral ferrule that includes a ferrule front portion, a ferrule back portion, and a ferrule center portion between the ferrule front portion and the ferrule back portion. The thickness of the ferrule center portion is smaller than the thickness of the ferrule front portion and the ferrule rear portion, and the inner diameter increases from the ferrule front portion and the ferrule rear portion to the ferrule center portion, and the ferrule is on the outer circumference between the ferrule front portion and the ferrule rear portion and the ferrule center portion, respectively. It may have a circular arc reinforcing part for reinforcing deformation of the ferrule.

At the outer end of the front part of the ferrule, a ferrule diameter induction portion corresponding to an inclined surface is formed, and the body includes a body penetration portion formed therein, a ferrule support portion communicating with the body penetration portion, a pipe fixing portion formed between the body penetration portion and the ferrule support portion, and a ferrule support portion. and a first ferrule induction portion formed between the pipe fixing portion, the first ferrule induction portion has a shape corresponding to the ferrule outer diameter induction portion, and the ferrule outer diameter induction portion may make surface contact with the first ferrule induction portion.

A pipe seating portion is formed between the body penetrating portion and the pipe fixing portion to determine the insertion position of the pipe, the inner diameter of the body penetrating portion is smaller than the outer diameter of the pipe, the inner diameter of the pipe fixing portion is equal to or greater than the outer diameter of the pipe, and the pipe is seated. The inner diameter of the section may be equal to or smaller than the outer diameter of the pipe.

The ferrule front portion of the ferrule is swaged along the first ferrule guide portion of the body, and the outer diameter of the pipe is swaged by the first ferrule hinge portion between the first ferrule guide portion and the pipe fixing portion to fix the position of the ferrule front portion of the ferrule As a result, the ferrule front portion of the ferrule can perform a sealing role.

The outer end of the rear part of the ferrule has a ferrule outer diameter guide portion corresponding to an inclined surface, and the nut includes a conduit fixing portion formed therein, a nut thread communicating with the conduit fixing portion, and a second ferrule inducing portion formed between the conduit fixing portion and the nut thread. The second ferrule inducing portion has a shape corresponding to that of the ferrule outer diameter inducing portion, and the ferrule outer diameter inducing portion may make surface contact with the second ferrule inducing portion.

The ferrule rear portion of the ferrule is swaged along the second ferrule guide portion of the nut, and the outer diameter of the pipe is swaged by the second ferrule hinge portion between the second ferrule guide portion and the conduit fixing portion to fix the position of the ferrule rear portion of the ferrule By doing so, the ferrule rear portion of the ferrule can perform a sealing role.

As described above, according to the solution to the problem of the present invention, in the pipe connection device, the thickness of the central portion of the ferrule is smaller than the thickness of the front portion of the ferrule and the rear portion of the ferrule, and the inner diameter increases from the front portion of the ferrule and the rear portion of the ferrule toward the central portion of the ferrule, and a ferrule front portion, a ferrule rear portion, and a ferrule center portion between the ferrule front portion and the ferrule rear portion, each having a ferrule front portion and an arc reinforcement portion for reinforcing deformation of the ferrule on an outer circumference between the ferrule rear portion and the ferrule center portion, respectively. By including an integral ferrule that does, it can have a simple structure. Accordingly, a pipe connecting device that is easy to assemble, has excellent price competitiveness, and has excellent sealing properties and excellent impact resistance can be provided.

That is, according to the solution to the problem of the present invention, the pipe connection device is a one ferrule method employing one ferrule. Compared to conventional lock-type devices, this structure can be simple in structure, easy to assemble, and excellent in price competitiveness. In addition, the pipe connection device according to the solving means of the present invention may have better sealing and impact resistance than conventional bite-type devices.

1 is an exploded three-dimensional view for explaining a conventional pipe connection device.

Figure 2 is an exploded three-dimensional view for explaining a pipe connection device according to an embodiment of the present invention.

Figure 3 is an exploded cross-sectional view for explaining the pipe connection device before screwing according to an embodiment of the present invention.

4 is a front view illustrating a ferrule, which is one component of a pipe connecting device according to an embodiment of the present invention.

5 is a cross-sectional view illustrating a ferrule, which is one component of a pipe connecting device according to an embodiment of the present invention.

Figure 6 is a coupling cross-sectional view for explaining a pipe connection device after screwing according to an embodiment of the present invention.

FIG. 7 is an enlarged cross-sectional view of portion A of FIG. 6 .

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Advantages and features of the present invention, and methods of achieving them, will become clear with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments described herein and may be embodied in different forms. Rather, the embodiments introduced herein are provided so that the disclosed content will be thorough and complete and the spirit of the present invention will be sufficiently conveyed to those skilled in the art, and the present invention is only defined by the scope of the claims.

Like reference numbers designate like elements throughout the specification. Accordingly, the same reference numerals or similar reference numerals may be described with reference to other drawings, even if not mentioned or described in the drawings. Also, even if reference numerals are not indicated, description may be made with reference to other drawings.

Terminology used herein is for describing the embodiments and is not intended to limit the present invention. In this specification, singular forms also include plural forms unless specifically stated otherwise in a phrase. As used herein, 'comprises' and/or 'comprising' refers to the presence of one or more other elements, steps, operations and/or devices mentioned. or do not rule out additions. In addition, since it is according to a preferred embodiment, reference numerals presented according to the order of description are not necessarily limited to the order.

An element is said to be 'connected to' or 'coupled to' with another element when it is directly connected to or coupled to another element, or another element in the middle. Includes all cases involving On the other hand, when one component is referred to as 'directly connected to' or 'directly coupled to' another component, it indicates that another component is not intervened. 'and/or' includes each and every combination of one or more of the recited items.

The spatially relative terms 'below', 'beneath', 'lower', 'above', 'upper', etc. It can be used to easily describe the relationship between devices or components and other devices or components. Spatially relative terms should be understood as encompassing different orientations of the device in use or operation in addition to the orientations shown in the figures. For example, when a device shown in the drawings is turned over, a device described as 'below' or 'beneath' another device may be placed 'above' the other device. Accordingly, the exemplary term 'below' may include directions of both down and up. The device may also be oriented in other orientations, and thus spatially relative terms may be interpreted according to the orientation.

In addition, the embodiments described in this specification will be described with reference to cross-sectional views and/or plan views, which are ideal exemplary views of the present invention. In the drawings, the thicknesses of films and regions are exaggerated for effective explanation of technical content. Accordingly, the shape of the illustrative drawings may be modified due to manufacturing techniques and/or tolerances. Therefore, embodiments of the present invention are not limited to the specific shapes shown, but also include changes in shapes generated according to manufacturing processes. For example, an area shown as a right angle may be rounded or have a predetermined curvature. Accordingly, the regions illustrated in the drawings have schematic properties, and the shapes of the regions illustrated in the drawings are intended to illustrate a specific shape of the region of the device and are not intended to limit the scope of the invention.

On the other hand, the embodiments described in this specification are described with the left as the front, the right as the rear, the top as the top, and the bottom as the bottom.

Figure 2 is an exploded three-dimensional view for explaining a pipe connecting device according to an embodiment of the present invention, Figure 3 is an exploded cross-sectional view for explaining a pipe connecting device before screwing according to an embodiment of the present invention, Figure 4 is a front view for explaining a ferrule, which is a component of a pipe connecting device according to an embodiment of the present invention, and FIG. 5 is a cross-sectional view for explaining a ferrule, which is a component of a pipe connecting device according to an embodiment of the present invention; 6 is a cross-sectional view illustrating a coupling device after screwing according to an embodiment of the present invention, and FIG. 7 is an enlarged cross-sectional view of portion A of FIG. 6 .

Referring to FIGS. 1 to 7 , the pipe connection device may include a body 10 , a nut 20 and a ferrule 30 . The body 10 and the nut 20 may be coupled to each other by screwing. The ferrule 30 may be inserted between the body 10 and the nut 20 to seal the coupling portion.

The ferrule 30 includes a ferrule front portion 31 coupled to the body 10, a ferrule rear portion 32 coupled to the nut 20, and formed between the ferrule front portion 31 and the ferrule rear portion 32. A ferrule central portion 33 may be included. The ferrule front portion 31, the ferrule rear portion 32, and the ferrule center portion 33 may be integrally formed.

In a state in which the body 10 and the nut 20 are screwed together, the ferrule front portion 31 may perform a function of sealing between the pipe 40 and the body 10 and fixing the pipe 40 . The ferrule rear part 32 may serve to seal between the pipe 40 and the nut 40 and to prevent the pipe 40 from departing in the direction of gravity by fixing the pipe 40 . The central portion of the ferrule 33 may play a role of compensating for a live load generated during fitting by connecting the pipe 40 and absorbing an external shock.

The ferrule central portion 33 may be formed thinner than the ferrule front portion 31 and thinner than the ferrule rear portion 32 . In this structure, the thickness of the ferrule center portion 33 is thinner than the ferrule front portion 31 and the ferrule rear portion 32 to the ferrule 30 in the horizontal direction (the screwing direction of the body 10 and the nut 20) When pressure is applied to the ferrule 30, the ferrule front portion 31 and the ferrule rear portion 32 are compressed into the ferrule central portion 33, and deformation may occur in which the ferrule central portion 33 protrudes to the outside. More details about this are described below.

The ferrule 30 may have a shape in which an inner diameter increases from the front portion 31 of the ferrule to the central portion 33 of the ferrule. Similarly, the ferrule 30 may have a shape in which an inner diameter increases from the rear part 32 of the ferrule to the central part 33 of the ferrule. In addition, the ferrule 30 may have an arc reinforcing portion 35 for reinforcing deformation of the ferrule 30 on the outer circumference between the ferrule front portion 31 and the ferrule rear portion 32 and the ferrule central portion 33, respectively. .

The ferrule central portion 33 of the ferrule 30 induces a force balance of the ferrule 30 and may play a role of compensating for live load by using the inherent elasticity of the material. In this structure, the impact resistance of the central portion 33 of the ferrule 30 is the weakest. Therefore, when external pressure acts on the ferrule 30, the central portion 33 of the ferrule, which has a low impact resistance value, is pushed outward, while the front portion 31 and the rear portion 32 of the ferrule are compressed toward the center, and the ferrule 30 ) can be deformed. Here, the circular arc reinforcing parts 35 of the ferrule 30 are for reinforcing deformation of the ferrule 30 by smoothly compressing the ferrule front part 31 and the ferrule rear part 32 toward the center.

A ferrule outer diameter guide portion 34 may be formed at an outer end of each of the ferrule front portion 31 and the ferrule rear portion 32 . The ferrule outer diameter inducing portion 34 of the ferrule front portion 31 contacts the first ferrule inducing portion 13 of the body 10 and may have shapes corresponding to each other. Similarly, the ferrule outer diameter guide portion 34 of the ferrule rear portion 32 contacts the second ferrule guide portion 23 of the nut 20 and may have shapes corresponding to each other.

The ferrule front part 31 is deformed by swaging along the first ferrule induction part 13 of the body 10, and the first ferrule hinge between the first ferrule induction part 13 and the pipe fixing part 16 ( 10) It can serve as a seal between them.

Similarly, the ferrule rear portion 32 is swaged along the second ferrule guide portion 23 of the nut 20 to form a second ferrule hinge portion 25 between the second ferrule guide portion 23 and the conduit fixing portion 21. ), the outer diameter of the pipe 40 is swaged and the position of the ferrule rear portion 32 of the ferrule 30 is fixed, so that the ferrule rear portion 32 moves between the pipe 40 and the nut 20. It can play a sealing role.

The material of the ferrule 30 is synthetic resin (eg, polyvinyl chloride (PVC)), metal (eg, copper (Cu), aluminum (Al) or brass), stainless steel (STainless Steel). : STS) and the like can be used. However, it is not limited thereto.

The body 10 includes a body through-portion 18 formed therein, a ferrule support portion 14 communicating with the body through-portion 18, and a pipe fixing portion 16 formed between the body through-portion 18 and the ferrule support portion 14. ) and a first ferrule guide part 13 formed between the ferrule support part 14 and the light distribution fixing part 16 .

The first ferrule guide portion 13 of the body 10 may contact the ferrule outer diameter guide portion 34 of the ferrule front portion 31 of the ferrule 30 and have shapes corresponding to each other. The first ferrule guide part 13 induces swaging deformation of the ferrule front part 31 to fix the ferrule 30 and seal between the body 10 and the ferrule 30 .

The body 10 may be formed to accommodate a pipe 40 having a predetermined outer diameter. The inner diameter of the body penetration part 18 may be smaller than the inner diameter of the pipe fixing part 16, and the inner diameter of the ferrule support part 14 may be larger than the inner diameter of the pipe fixing part 16. A pipe resting part 11 may be formed between the pipe fixing part 16 and the body penetrating part 18 .

The inner diameter of the body penetration part 18 is smaller than the outer diameter of the pipe 40, and the inner diameter of the pipe fixing part 16 may be equal to or larger than the outer diameter of the pipe 40. The inner diameter of the pipe seating portion 11 may be equal to or smaller than the outer diameter of the pipe 40 . The pipe seating portion 11 may be formed in a tapered structure in which an inner diameter decreases as it is closer to the body penetrating portion 18 . The pipe fixing part 16 and the pipe seating part 11 may be designed to minimize shaking of the pipe 40 due to external impact.

In this structure, the pipe 40 may be inserted into the pipe mounting portion 11 and then fixed. That is, the pipe seating part 11 may determine the insertion position of the pipe 40 . The sealing performance of the pipe 40 and the body 10 is due to the mutual relationship between the inner diameter of the body penetration part 18, the inner diameter of the pipe seating part 11, the inner diameter of the pipe fixing part 16, and the outer diameter of the pipe 40. this can be improved.

A body thread 12 and a body protrusion 17 may be formed on the outer circumference of the body 10 . The body protrusion 17 may have, for example, a hexagonal shape.

When the body 10 and the nut 20 are screwed together during the assembly process, the position of the ferrule 30 may be fixed at the interface between the pipe fixing part 16 and the first ferrule inducing part 13 . That is, the interface between the pipe fixing part 16 and the first ferrule inducing part 13 may serve as the first ferrule hinge part 15 .

As the material of the body 10, synthetic resin (eg, polyvinyl chloride), metal (eg, copper, aluminum, or brass), stainless steel, or the like may be used. However, it is not limited thereto.

The nut 20 includes a conduit fixing portion 21 formed therein, a nut thread 22 communicating with the conduit fixing portion 21, and a second ferrule guide portion formed between the conduit fixing portion 21 and the nut thread 22 ( 23) may be included.

The second ferrule guide portion 23 of the nut 20 contacts the ferrule outer diameter guide portion 34 of the ferrule rear portion 32 of the ferrule 30 and may have shapes corresponding to each other.

The position of the ferrule 30 may be fixed at the interface between the conduit fixing part 21 and the second ferrule inducing part 23 . That is, the interface between the conduit fixing part 21 and the second ferrule guide part 15 may serve as the second ferrule hinge part 25 .

The nut 20 may be designed to accommodate the pipe 40 having a predetermined outer diameter. The inner diameter of the conduit fixing part 21 may be formed equal to or larger than the outer diameter of the receiving pipe 40 . The conduit fixing part 21 may serve to reduce shaking of the pipe 40 due to external impact.

The inner diameter of the nut thread 22 may be larger than the outer diameter of the pipe 40 to be accommodated. The nut thread 22 is screwed with the body thread 12 formed on the outer circumferential surface of the body 10 to assemble the body 10 and the nut 20.

The material of the nut 20 may be synthetic resin (eg, polyvinyl chloride), metal (eg, copper, aluminum or brass), stainless steel, or the like. However, it is not limited thereto.

For consistency of product fitting, it is better to proceed with assembly after taking measures to ensure that there are no burrs at the front end of the pipe 40. In order to induce a stable position of the pipe 40, the pipe 40 may pass through the inside of the nut 20 and the ferrule 30 and be inserted into the inner pipe seating portion 11 of the body 10.

When fitting the product, you can proceed after marking to ensure that the pipe 40 is well maintained in place. After confirming the distance value for the basic dimension of the product in a provisionally assembled state, fitting work for the pipe 40 may be performed. The assembly may be completed by screwing the body 10 and the nut 20 together.

In order to confirm that the assembly is properly completed, after checking the distance between the body 10 and the nut 20 with a gauge, confirmation marking may be performed at the completed position. The final inspection of the assembled product may be completed by checking the gap between the nut 20 and the body 10 using a gauge. For example, the product may be sold in a provisionally assembled state in which the distance between the body 10 and the nut 20 is maintained at 2 to 2.3 mm, and when the assembly is completed in the equipment process, the body 10 and the nut ( 20) can be designed so that the distance between them is around 0.7 mm.

First, the nut 20 and the ferrule 30 may be fitted. A nut 20 may be fitted into the pipe 40 . Subsequently, after inserting the ferrule 30 into the pipe 40, the ferrule 30 is fixed to the inside of the nut 20.

The pipe 40 may be inserted into the nut 20 so that the pipe 40 passes through the pipe fixing part 21 , the second ferrule guide part 23 and the nut thread 22 . Subsequently, the pipe 40 may be inserted into the ferrule 30 .

The ferrule 30 may be fixed to the nut 20 by contacting the ferrule outer diameter guide portion 34 of the ferrule rear portion 32 of the ferrule 30 with the second ferrule guide portion 23 of the nut 20 .

Subsequently, the pipe 40 may be inserted into the body 10. After the ferrule 30 is fixed to the body 10, the body 10 and the nut 20 may be screwed together. The body thread 12 formed on the outer circumferential surface of the body 10 may be coupled with the nut thread 22 formed on the inner circumferential surface of the nut 20 .

Subsequently, the nut 20 may be tightened in the screwing direction by using a torque wrench until the pipe 40 reaches the pipe mounting portion 11 . The nut thread 22, which is a female thread formed on the inner circumferential surface of the nut 20, and the body thread 12, which is a male thread formed on the outer circumferential surface of the body 10, may be mechanically assembled. The ferrule 30 can also move in the screwing direction.

When the pipe 40 reaches the pipe seating portion 11, the ferrule outer diameter guide portion 34 of the ferrule front portion 31 of the ferrule 30 may come into contact with the first ferrule guide portion 13 of the body 10. there is. After the ferrule outer diameter guide portion 34 of the ferrule front portion 31 of the ferrule 30 comes into contact with the first ferrule guide portion 13 of the body 10, it may be fixed at that position. Here, the ferrule outer diameter guide portion 34 of the ferrule front portion 31 of the ferrule 30 may make surface contact with the first ferrule guide portion 13 of the body 10 . Accordingly, performance of the ferrule 30 sealing between the pipe 40 and the body 10 may be improved.

Similarly, when the pipe 40 reaches the pipe seating portion 11, the ferrule outer diameter guide portion 34 of the ferrule rear portion 32 of the ferrule 30 contacts the second ferrule guide portion 23 of the nut 20. can be fixed in a fixed state. Here, the ferrule outer diameter guide portion 34 of the ferrule rear portion 32 of the ferrule 30 may make surface contact with the second ferrule guide portion 23 of the nut 20 . Accordingly, performance of the ferrule 30 sealing between the pipe 40 and the nut 20 may be improved.

The distance between the body 10 and the nut 20 in a state in which the assembly of the product is completed may be, for example, about 0.7 mm or less. However, it is not limited thereto.

When the body 10 and the nut 20 are screwed together, pressure may be applied to the ferrule 30 in the screwing direction. Since the thickness of the ferrule center portion 33 of the ferrule 30 is smaller than the thicknesses of the ferrule front portion 31 and the ferrule rear portion 32, the ferrule center portion 33 is the weakest in terms of impact resistance value as well. Accordingly, when an external pressure acts on the ferrule 30, the central portion 33 of the ferrule having a low impact resistance value is crushed, and the front portion 31 and the rear portion 32 of the ferrule can be compressed and moved toward the center. As a result, swaging, which is a compression deformation in which the outer circumferential surface of the central portion 33 of the ferrule is pushed outward and rises, may occur. Accordingly, the pipe 40 may be fixed and fitted by the pipe connecting device.

When pressure is applied to the ferrule 30 in the screwing direction, the outer end of the ferrule front portion 31 of the ferrule 30 that is in contact with the first ferrule induction portion 13 of the body 10 is swaged and deformed, so that the pipe 40 ) can be embedded in the outer periphery of As a result, the position of the pipe 40 may be fixed by swaging the outer diameter of the pipe 40 . In addition, as the ferrule central portion 33 of the ferrule 30 is pushed outward in a direction perpendicular to the screwing direction, the ferrule outer diameter guide portion 34 of the ferrule front portion 31 may come into contact with the inner circumferential surface of the body 10. there is. That is, the ferrule outer diameter guide portion 34 of the ferrule front portion 31 of the ferrule 30 may make surface contact with the first ferrule guide portion 13 of the body 10 .

Similarly, when pressure is applied to the ferrule 30 in the screwing direction, the outer end of the ferrule rear portion 32 of the ferrule 30 that comes into contact with the second ferrule guide portion 23 of the nut 20 is swaged and deformed so that the pipe It can be nailed to the outer periphery of (40). As a result, the position of the pipe 40 may be fixed by swaging the outer diameter of the pipe 40 . In addition, as the ferrule central portion 33 of the ferrule 30 is pushed outward in a direction perpendicular to the screwing direction, the ferrule outer diameter guide portion 34 of the ferrule rear portion 32 may come into contact with the inner circumferential surface of the nut 20. there is. That is, the ferrule outer diameter guide portion 34 of the ferrule rear portion 32 of the ferrule 30 may make surface contact with the second ferrule guide portion 23 of the nut 20 .

The ferrule 30 of the pipe connection device according to an embodiment of the present invention is designed with a geometric structure capable of internally absorbing and compensating for a live load that changes in real time. That is, when an external impact is applied, the ferrule 30 of the pipe connection device according to an embodiment of the present invention absorbs the impact and changes its shape to further improve sealing performance with the body 10 and the nut 20. can transform

The pipe connection device according to an embodiment of the present invention may have a structure in which the integral ferrule 30 is inclinedly coupled to the nut 20 and also inclinedly coupled to the body 10. Therefore, the pipe connection device according to an embodiment of the present invention has a simple structure and can be easily assembled. In addition, when an external impact is applied to the ferrule 30, the ferrule front portion 31 and the ferrule rear portion 32, which are both ends of the ferrule 30, are compressed and deformed to the ferrule central portion 33, thereby increasing sealing performance and impact resistance can have a structure that

Two ferrules are used in a conventional lock-type pipe connection device. The two ferrules performed different roles respectively. Referring back to FIG. 1 , the first ferrule 310 reduces the outer diameter of the second ferrule 320 and seals between the body 100 and the second ferrule 320 . The second ferrule 320 fixes the pipe and seals between the nut 200 and the first ferrule 310 .

In the pipe connection device according to an embodiment of the present invention, by adopting the integral ferrule 30, one integral ferrule 30 can simultaneously perform various functions performed by two or more conventional ferrules. Specifically, in the ferrule 30 of the pipe connection device according to an embodiment of the present invention, a ferrule front portion 31, a ferrule rear portion 32, and a ferrule central portion 33 are integrally formed. The ferrule front part 31 may perform a function of sealing between the pipe 40 and the body 10 and fixing the pipe 40 . The ferrule rear part 32 may serve to seal between the pipe 40 and the nut 20 and to prevent the pipe 40 from being separated in the direction of gravity by fixing the pipe. The central portion of the ferrule 33 may serve to compensate for a live load generated when fitting the pipe 40 and to absorb an external shock.

When the ferrule 30 compressed and fixed by screwing between the body 10 and the nut 20 is inserted into the inner diameter of the body 10 and supported, it can serve as a force distribution according to the vertical load separation. . The ferrule central portion 33 can play a role of absorbing and buffering external impact by using the geometry and elasticity of the material for the load generated when assembling the product at the ferrule front portion 31 and the ferrule rear portion 32. .

Compared to conventional pipe connection devices including two or more ferrules, a pipe connection device according to an embodiment of the present invention may have a simple configuration, easy assembly, and high price competitiveness. In addition, management and replacement of parts may be easy. Compared to a conventional pipe connecting device in which two or more ferrules are combined, the possibility of leakage is small and it can be strong against external impact.

The ferrule 30 of the pipe connecting device according to an embodiment of the present invention exhibits good performance characteristics regarding pressure, sealing and fatigue resistance from vibration and stress of the pipe 40 due to its geometry. Also, the live load can be compensated very effectively. Compared to the conventional pipe connection device, it has excellent shock absorption performance applied from the outside. It is a groundbreaking technology that can realize both ultra-high pressure sealing performance and live load compensation performance at the same time.

In addition, the pipe connecting device according to an embodiment of the present invention requires a torque value of 17.5 kg or less to assemble the pipe connecting device of Patent Document 0001 filed by the present applicant, while assembling with a torque value of about 5.3 to 5.9 kg. this could be possible

In addition, the pipe connection device according to an embodiment of the present invention includes the first and second

ferrule guide parts

13 and 23 and the first and

second hinge parts

15 and 25, so that the vibration absorption section is 0001 was in the first and second

ferrule guide parts

13 and 23 of the pipe connecting device, but in the pipe connecting device according to an embodiment of the present invention, this vibration absorbing section is the ferrule front portion 31 of the ferrule 30 and circular arc reinforcing parts 35 formed between the ferrule rear portion 32 and the ferrule central portion 33. Accordingly, the ferrule 30 of the pipe connecting device according to an embodiment of the present invention exhibits good performance characteristics regarding pressure, sealing, and fatigue resistance from vibration and stress of the pipe 40 due to its geometric structure.

In the pipe connection device according to an embodiment of the present invention, the thickness of the central portion of the ferrule is smaller than the thickness of the front portion of the ferrule and the rear portion of the ferrule, the inner diameter increases from the front portion of the ferrule and the rear portion of the ferrule to the central portion of the ferrule, and the front portion of the ferrule and the ferrule By including an integral ferrule including a ferrule front portion, a ferrule rear portion, and a ferrule center portion between the ferrule front portion and the ferrule rear portion, each having an arc reinforcing portion for reinforcing deformation of the ferrule on the outer circumference between the rear portion and the ferrule center portion. , can have a simple structure. Accordingly, a pipe connecting device that is easy to assemble, has excellent price competitiveness, and has excellent sealing properties and excellent impact resistance can be provided.

Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art can implement the present invention in other specific forms without changing its technical spirit or essential features. You will understand that there is Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive.

Claims

body;

nut; and

including a ferrule;

The body, the nut and the ferrule accommodate a pipe having a predetermined outer diameter,

The ferrule is an integral ferrule comprising a ferrule front portion, a ferrule rear portion, and a ferrule center portion between the ferrule front portion and the ferrule rear portion;

The thickness of the central portion of the ferrule is smaller than the thicknesses of the front portion of the ferrule and the rear portion of the ferrule,

An inner diameter increases from the front portion of the ferrule and the rear portion of the ferrule toward the central portion of the ferrule, and

The ferrule has a circular arc reinforcement portion for reinforcing the deformation of the ferrule on each of the outer circumferences between the front portion of the ferrule and the rear portion of the ferrule and the central portion of the ferrule pipe connection device.
According to claim 1,

A ferrule outer diameter guide portion corresponding to an inclined surface is formed at an outer end of the ferrule front portion,

The body includes a body penetration part formed therein, a ferrule support part communicating with the body penetration part, a pipe fixing part formed between the body penetration part and the ferrule support part, and a first ferrule guide part formed between the ferrule support part and the pipe fixing part. Including,

The first ferrule guide portion has a shape corresponding to the ferrule outer diameter guide portion, and the ferrule outer diameter guide portion makes surface contact with the first ferrule guide portion.
According to claim 2,

A pipe seating portion for determining an insertion position of the pipe is formed between the body penetrating portion and the pipe fixing portion,

The inner diameter of the body through-hole is smaller than the outer diameter of the pipe,

The inner diameter of the pipe fixing part is equal to or greater than the outer diameter of the pipe, and

The inner diameter of the pipe seating portion is equal to or smaller than the outer diameter of the pipe.
According to claim 3,

The ferrule front portion of the ferrule is swaged deformed along the first ferrule guide portion of the body to swage deform the outer diameter of the pipe by the first ferrule hinge portion between the first ferrule guide portion and the pipe fixing portion A pipe connecting device that serves to seal the ferrule front portion of the ferrule by fixing the position of the ferrule front portion of the ferrule.
According to claim 1,

The outer end of the ferrule rear portion is formed with a ferrule outer diameter induction portion corresponding to an inclined surface,

The nut includes a conduit fixing part formed therein, a nut thread communicating with the conduit fixing part, and a second ferrule guide part formed between the conduit fixing part and the nut thread,

The second ferrule guide portion has a shape corresponding to the ferrule outer diameter guide portion, and the ferrule outer diameter guide portion makes surface contact with the second ferrule guide portion.
According to claim 5,

The ferrule rear portion of the ferrule is swaged along the second ferrule guide portion of the nut so that the outer diameter of the pipe is swaged and deformed by a second ferrule hinge portion between the second ferrule guide portion and the conduit fixing portion. A pipe connecting device that serves to seal the ferrule rear portion of the ferrule by fixing the position of the ferrule rear portion of the ferrule.