WO2008018727A1 - Pipe coupling with donut type case - Google Patents

Pipe coupling with donut type case Download PDF

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Publication number
WO2008018727A1
WO2008018727A1 PCT/KR2007/003768 KR2007003768W WO2008018727A1 WO 2008018727 A1 WO2008018727 A1 WO 2008018727A1 KR 2007003768 W KR2007003768 W KR 2007003768W WO 2008018727 A1 WO2008018727 A1 WO 2008018727A1
Authority
WO
WIPO (PCT)
Prior art keywords
ring
shaped
pipes
inlet
close contact
Prior art date
Application number
PCT/KR2007/003768
Other languages
French (fr)
Inventor
Nam-Kyun Cho
Original Assignee
Nam-Kyun Cho
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nam-Kyun Cho filed Critical Nam-Kyun Cho
Publication of WO2008018727A1 publication Critical patent/WO2008018727A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L21/00—Joints with sleeve or socket
    • F16L21/02—Joints with sleeve or socket with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings
    • F16L21/022—Joints with sleeve or socket with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings used with sleeves or nipples for pipes of the same diameter, or with reduction pieces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L21/00—Joints with sleeve or socket
    • F16L21/02—Joints with sleeve or socket with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L17/00—Joints with packing adapted to sealing by fluid pressure
    • F16L17/02—Joints with packing adapted to sealing by fluid pressure with sealing rings arranged between outer surface of pipe and inner surface of sleeve or socket
    • F16L17/025—Joints with packing adapted to sealing by fluid pressure with sealing rings arranged between outer surface of pipe and inner surface of sleeve or socket the sealing rings having radially directed ribs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L21/00—Joints with sleeve or socket
    • F16L21/06—Joints with sleeve or socket with a divided sleeve or ring clamping around the pipe-ends

Definitions

  • the present invention relates, in general, to pipe couplings, which have ring-shaped casings and are used to couple pipes, such as water service pipes to each other and, more particularly, to a pipe coupling, which is constructed such that pipes are separably coupled to each other through a simple process that does not use a separate nut and bolt, thus being convenient for a user.
  • Background Art
  • pipes are used to transport fluid such as water, oil, gas, etc. Because such pipes are typically manufactured to limited lengths, if pipes for transporting fluid are relatively long, many connection junction points between the pipes will be required. In this case, a separate pipe coupling is provided on each connection junction between the adjacent pipes such that the pipes can be tightly coupled to each other.
  • Such pipe coupling which couples pipes so that fluid can be transported therebetween, includes a pair of pipe connection members, which surround the outer surfaces of the facing ends of the pipes.
  • the conventional pipe coupling having the above-mentioned construction is advantageous in that the pipes can be tightly coupled to each other.
  • separate nuts and bolts must be used to couple the pipe connection members to each other. Therefore, there are problems in that working time is high, and the bolts and nuts may undesirably become removed from the pipe connection members and be thus lost. Disclosure of Invention Technical Problem
  • an object of the present invention is to provide a pipe coupling having a ring-shaped casing which is constructed such that pipes can be removably coupled to the pipe coupling through a simple coupling process using the ring-shaped casing and a sealing member without using a separate nut and bolt, thus simplifying the pipe coupling process.
  • Another object of the present invention is to provide a pipe coupling having the ring-shaped casing which includes the sealing member having contact sealing protrusions to prevent fluid, which flows through the pipes, from leaking out and to prevent foreign substances from entering the pipes when the pipes are coupled to the pipe coupling, so that the pipes can be reliably and watertightly coupled to the pipe coupling.
  • the present invention provides a pipe coupling provided on a connection junction between opposite pipes to prevent fluid leakage, including: a sealing member, having a ring-shaped tube to surround outer surfaces of the opposite pipes, with a hollow space defined in the ring-shaped tube, a close contact part protruding from a medial portion of an inner surface of the ring-shaped tube to have a ring shape, the close contact part being brought into close contact with ends of the opposite pipes, a plurality of contact sealing protrusions provided on the inner surface of the ring-shaped tube at positions spaced apart from each other in a longitudinal direction at regular intervals, each of the contact sealing protrusions extending in a circumferential direction and being bent at an end thereof towards the close contact part such that the end of the contact sealing protrusion is brought into close contact with the outer surface of the corresponding pipe, and an inlet unit provided at a position in an outer surface of the ring-shaped tube, so that fluid is injected into the hollow space of the ring-shaped tube
  • the present invention provides a pipe coupling provided on a connection junction between two pipes to prevent fluid leakage, including: a sealing member, having a ring-shaped receiving part to surround outer surfaces of the opposite pipes, a close contact part protruding from a medial portion of an inner surface of the ring-shaped receiving part to have a ring shape, the close contact part being in brought into close contact with ends of the opposite pipes, and a plurality of contact sealing protrusions provided on the inner surface of the ring-shaped receiving part at positions spaced apart from each other in a longitudinal direction at regular intervals, each of the contact sealing protrusions extending in a circumferential direction and being bent at an end thereof towards the close contact part such that the end of the contact sealing protrusion is brought into close contact with the outer surface of the corresponding pipe; and a ring-shaped casing, having a casing body having a ring shape and receiving the ring-shaped receiving part therein such that the casing body is disposed at a position spaced
  • the pipe coupling having a ring-shaped casing according to the present invention makes it possible to separably couple pipes to each other through a simple process using the ring-shaped casing and a sealing member, without using a separate nut and bolt, thus being convenient for a user.
  • the pipe coupling having the ring-shaped casing according to the present invention includes the sealing member having contact sealing protrusions, which can effectively prevent fluid, which flows through the pipes, from leaking out and prevent foreign substances from entering the pipes when the pipes are coupled to the pipe coupling. Therefore, the pipes can be reliably and watertightly coupled to the pipe coupling.
  • FIG. 1 is a perspective view of a pipe coupling having a ring-shaped casing, according to a first embodiment of the present invention
  • FIG. 2 is a perspective view showing pipes coupled to each other using the pipe coupling having the ring-shaped casing according to the first embodiment of the present invention
  • FIG. 3 is a sectional view showing the pipes coupled to each other using the pipe coupling having the ring-shaped casing according to the first embodiment of the present invention
  • FIG. 4 is a sectional view showing pipes coupled to each other using a pipe coupling having a ring-shaped casing, according to a second embodiment of the present invention.
  • 18a inlet hole 18b: inlet port [20] 18c: check valve 20: ring-shaped casing
  • a pipe coupling according to an embodiment of the present invention is provided on a connection junction between opposite pipes to prevent fluid leakage.
  • the pipe coupling includes a sealing member and a ring-shaped casing.
  • the sealing member includes a ring-shaped tube, which surrounds outer surfaces of the opposite pipes, with a hollow space defined in the ring- shaped tube, and a close contact part, which protrudes from a medial portion of an inner surface of the ring-shaped tube to have a ring shape. The close contact part is brought into close contact with ends of the opposite pipes.
  • the sealing member further includes a plurality of contact sealing protrusions, which are provided on the inner surface of the ring-shaped tube at positions spaced apart from each other in a longitudinal direction at regular intervals.
  • Each of the contact sealing protrusions extends in a circumferential direction and is bent at an end thereof towards the close contact part such that the end of the contact sealing protrusion is brought into close contact with the outer surface of the corresponding pipe.
  • the sealing member further includes an inlet unit, which is provided at a position in an outer surface of the ring-shaped tube, so that fluid is injected into the hollow space of the ring-shaped tube through the inlet unit to apply pressure to the inner surface of the ring-shaped tube.
  • the ring-shaped casing includes a casing body, which receives and supports the outer surface of the ring-shaped tube, bent parts, which are formed by bending respective opposite ends of the casing body such that ends thereof are brought into contact with the outer surface of the respective pipes, and an inlet seating hole, which is formed through the casing body at a position corresponding to the inlet unit of the sealing member, so that the inlet unit protrudes outside through the inlet seating hole.
  • a pipe coupling is provided on a connection junction between two pipes to prevent fluid leakage.
  • the pipe coupling includes a sealing member and a ring-shaped casing.
  • the sealing member includes a ring-shaped receiving part, which surrounds outer surfaces of the opposite pipes, and a close contact part, which protrudes from a medial portion of an inner surface of the ring-shaped receiving part to have a ring shape.
  • the close contact part is in brought into close contact with ends of the opposite pipes.
  • the sealing member further includes a plurality of contact sealing protrusions, which are provided on the inner surface of the ring-shaped receiving part at positions spaced apart from each other in a longitudinal direction at regular intervals.
  • the ring-shaped casing includes a casing body, which has a ring shape and receives the ring-shaped receiving part therein such that the casing body is disposed at a position spaced apart from an outer surface of the ring-shaped receiving part by a predetermined distance, and bent parts, which are formed by bending respective opposite ends of the casing body such that a hollow space is defined in a circumferential inner surface of the casing body and such that ends thereof are brought into contact with the outer surface of the respective pipes.
  • the bent parts are in contact at inner surfaces thereof with respective opposite ends of the ring-shaped receiving part to seal the hollow space.
  • the ring-shaped casing further includes an inlet unit, which is formed at a position in the casing body, so that fluid is injected into the hollow space through the inlet unit to apply pressure to the inner surface of the ring-shaped receiving part.
  • the inlet unit may include an inlet hole, which is formed at a predetermined position through the outer surface of the ring-shaped tube, an inlet port, which extends outwards from the inlet hole, the inlet port being seated through the inlet seating hole of the ring-shaped casing, and a check valve, which is provided at a predetermined position in the inlet port to prevent fluid, injected into the hollow space of the ring- shaped tube through the inlet port, from leaking out and to adjust an amount of fluid charged into the hollow space.
  • the inlet unit may include an inlet hole, which is formed at a predetermined position in the casing body, an inlet port, which extends outwards from and is in close contact with an inner surface of the inlet hole, and a check valve, which is provided at a predetermined position in the inlet port to prevent fluid, injected into the hollow space of the ring-shaped casing, from leaking out and to adjust an amount of fluid charged into the hollow space.
  • the ring-shaped tube or the ring-shaped receiving part may be made of elastic material, such as rubber, urethane, silicone, etc.
  • the ring-shaped casing may be made of plastic, iron, aluminum or stainless steel.
  • FIG. 1 is a perspective view of the pipe coupling having a ring-shaped casing, according to the first embodiment of the present invention.
  • FIG. 2 is a perspective view illustrating pipes coupled to each other using the pipe coupling having the ring-shaped casing according to the first embodiment of the present invention.
  • FIG. 3 is a sectional view illustrating the pipes coupled to each other using the pipe coupling having the ring-shaped casing according to the first embodiment of the present invention.
  • the pipe coupling 1 which is fitted over junction parts between two pipes 70 to prevent fluid leakage, includes a sealing member 10 for ensuring air- tightness, and a ring-shaped casing 20, which supports the sealing member 10.
  • the sealing member 10 serves to increase contact sealing force between the pipes
  • the sealing member 10 includes a ring-shaped tube 12, a close contact part 14, contact sealing protrusions 16 and an inlet unit 18.
  • the ring-shaped tube 12 has a ring shape to surround the outer surfaces of the opposite pipes 70, so that the pipes 70 are inserted into the ring-shaped tube 12. Furthermore, a hollow space is defined in the sidewall of the ring-shaped tube 12.
  • the ring-shaped tube 12 is made of elastic material, such as rubber, urethane, silicone, etc., such that it can be in close contact with the outer surface of the opposite pipes 70.
  • the close contact part 14 protrudes from a medial portion of the inner surface of the ring-shaped tube 12 to have a ring shape.
  • the contact sealing protrusions 16 serve to further increase the contact sealing force of the ring-shaped tube 12 when the opposite pipes 70 are coupled to each other by the pipe coupling 1, by which the pipes 70 are coupled to each other more tightly. Furthermore, the contact sealing protrusions 16 serve to prevent the pipes 70 from being undesirably removed from the pipe coupling 1.
  • the contact sealing protrusions 16, each of which extends in a circumferential direction, are formed on the circumferential inner surface of the ring-shaped tube 12 at positions spaced apart from each other at regular intervals. The end of each contact sealing protrusion 16 is bent towards the close contact part 14 at a predetermined angle such that it is in close contact with the surface of the corresponding pipe 70.
  • the inlet unit 18 has an inlet hole 18a, which is formed at a predetermined position through the circumferential outer surface of the ring-shaped tube 12, and an inlet port 18b, which extends outwards from the inlet hole 18a and is seated through an inlet seating hole 26 of the ring-shaped casing 20, which will be explained later herein.
  • the inlet unit 18 further has a check valve 18c, which is provided at a predetermined position in the inlet port 18b to prevent fluid in the hollow space of the ring-shaped tube 12 from leaking out through the inlet port 18b and to adjust the amount of fluid charged into the hollow space.
  • a typical valve for controlling the supply or discharge of fluid is used as the check valve 18c.
  • the construction thereof is well known in this art, and therefore further explanation is deemed unnecessary.
  • the ring-shaped casing 20 which serves to support the sealing member 10, is made of hard material, such as reinforced plastic, steel, aluminum or stainless steel.
  • the ring- shaped casing 20 includes a casing body 22, bent parts 24 and the inlet seating hole 26.
  • the casing body 22 receives the ring-shaped tube 12 of the sealing member 10 therein and supports the circumferential outer surface of the ring-shaped tube 12.
  • the casing body 22 has a ring shape, which has an inner diameter corresponding to the outer diameter of the ring-shaped tube 12, so that the casing body 22 is in close contact with the circumferential outer surface of the ring-shaped tube 12.
  • the bent parts 24 are bent on the respective opposite ends of the casing body 22 such that the ends thereof are brought into contact with the outer surface of the corresponding pipes 70.
  • the inlet seating hole 26 is formed through the casing body 22 such that the inlet port 18b of the inlet unit 18 protrudes outside through the inlet seating hole 26.
  • the inlet seating hole is formed at a position corresponding to the inlet port 18b of the inlet unit 18, so that the inlet port 18b is seated in the inlet seating hole 26 such that it protrudes outside the pipe coupling 1 through the inlet seating hole 26.
  • the opposite pipes 70 are inserted into the sealing member 10 along the inner surface of the ring-shaped tube 12 until the ends of the pipes 70 are brought into contact with the close contact part 14 of the sealing member 10. At this time, it is preferable for the ends of the pipes 70 to be brought into as close contact with the close contact part as possible.
  • the pipes 70 can more firmly contact the sealing member thanks to the contact sealing protrusions 16, which are provided on the inner surface of the ring- shaped tube 12. Therefore, fluid, which flows through the pipes 70, can be reliably prevented from leaking.
  • the contact sealing protrusions 16 are formed such that they are bent towards the close contact part 14 of the sealing member 10, the pipes 70 are easily inserted into the ring-shaped tube 12 and are prevented from being easily removed from the sealing member 10. In other words, the pipes can be more securely coupled to each other.
  • the pipe coupling 1 having the ring-shaped casing 20 according to the first embodiment of the present invention is constructed such that the pipes 70 can be separably coupled to each other using the ring-shaped casing 20 and the sealing member 10 through a simple process without using a separate nut and bolt, so that there is an advantage in that it is very convenient for the user.
  • the present invention has the contact sealing protrusions 16, which serve to prevent the leakage of fluid that flows through the pipes 70 and the entrance of foreign substances into the pipes. Therefore, there is an advantage in that the pipes 70 can be coupled to the pipe coupling 1 more reliably and watertightly.
  • FIG. 4 is a sectional view showing pipes coupled to each other using a pipe coupling having a ring-shaped casing, according to a second embodiment of the present invention.
  • the pipe coupling according to the second embodiment of the present invention which is fitted over a junction between two pipes 70 to prevent water leakage, includes a sealing member 50 having a ring-shaped receiving part 52, in place of the sealing member 10 (shown in FIG. 3) having the ring-shaped tube 12 (shown in FIG. 3) of the first embodiment.
  • a hollow space is defined in a ring-shaped casing 60.
  • the casing body 22 (shown in FIG. 3) of the ring-shaped casing 20 shown in FIG.
  • the second embodiment is in close contact with and supports the outer surface of the ring-shaped tube 12 (shown in FIG. 3), the second embodiment is constructed such that a casing body 62 of a ring-shaped casing 60 is spaced apart from the outer surface of the ring-shaped receiving part 52 by a predetermined distance.
  • the general construction of the second embodiment is the same as the first embodiment except for the above-mentioned structure.
  • the pipe coupling having the ring-shaped casing according to the second embodiment is characterized by the coupling between the sealing member 50 and the ring-shaped casing 60.
  • the sealing member 50 includes the ring-shaped receiving part 52, which has a ring shape and surrounds the outer surfaces of opposite pipes 70, and a close contact part 54, which protrudes from the medial portion of the inner surface of the ring-shaped receiving part 52 to have a ring shape and is brought into close contact with the ends of the opposite pipes 70.
  • the sealing member 50 further includes contact sealing protrusions 56, each of which extends in a circumferential direction, and which are formed on the circumferential inner surface of the ring-shaped receiving part 52 at positions spaced apart from each other at regular intervals. The end of each contact sealing protrusion 56 is bent towards the close contact part 54 at a predetermined angle such that it can be in close contact with the surface of the corresponding pipe 70.
  • the ring-shaped receiving part 52 is made of elastic material, such as rubber, ure thane, silicone, etc., such that it can be in close contact with the outer surface of the opposite pipes 70.
  • the ring-shaped casing 60 includes the casing body 62, which has a ring shape and receives the ring-shaped receiving part 52 therein such that it is disposed at a position spaced apart from the outer surface of the ring-shaped receiving part 52 by a predetermined distance.
  • the ring-shaped casing 60 further includes bent parts 64, which are bent on the respective opposite ends of the casing body 62 such that a hollow space is defined in the casing body 62 and the ends thereof are brought into contact with the outer surface of the corresponding pipes 70.
  • the opposite ends of the ring- shaped receiving part 52 are in close contact with the inner surfaces of the respective bent parts 64 and thus seal the hollow space.
  • the ring-shaped casing 60 further includes an inlet unit 68, which is formed at a predetermined position in the casing body 62, so that fluid is injected into the hollow space through the inlet unit to compress the circumferential inner surface of the ring-shaped receiving part 52.
  • the inlet unit 68 serves as a passage for the injection of fluid into the hollow space of the ring-shaped casing 60 to apply pressure to the inner surface of the ring-shaped receiving part 52.
  • the inlet unit 68 includes an inlet hole 68a, which is formed at a predetermined position in the casing body 62 of the ring-shaped casing 60, an inlet port 68b, which extends outwards from the inlet hole 68a in a state in which it is in close contact with the casing body 62, and a check valve 68c, which is provided at a predetermined position in the inlet port 68b to prevent fluid in the hollow space of the ring-shaped casing 60 from leaking out through the inlet port 68b and to adjust the amount of fluid charged into the hollow space.
  • the opposite pipes 70 are inserted into the sealing member 50 along the inner surface of the ring-shaped receiving part 52, until the ends of the pipes 70 are brought into contact with the close contact part 54 of the sealing member 50. At this time, it is preferable that the ends of the pipes 70 be brought into as close contact with the close contact part as possible.
  • the pipes 70 can more firmly contact the sealing member thanks to the contact sealing protrusions 56, which are provide on the inner surface of the ring- shaped receiving part 52. Therefore, fluid, which flows through the pipes 70, can be reliably prevented from leaking.
  • the contact sealing protrusions 56 are formed such that they are bent towards the close contact part 54 of the sealing member 50, the pipes 70 are easily inserted into the ring-shaped receiving part 52 and are prevented from being easily removed from the sealing member 50. In other words, the pipes can be more firmly coupled to each other.
  • the pipe coupling according to the present invention is constructed such that the pipes can be separably coupled to each other using the ring- shaped casing and the sealing member through a simple process that does not use a separate nut and bolt, so that there is an advantage in that it is very convenient for the user.
  • the pipe coupling according to the present invention makes it possible to separably couple pipes to each other through a simple process that does not require a separate nut and bolt, and can be applied to various kinds of pipes, such as water and sewage pipes, oil pipes, gas pipes, etc., for transporting fluid.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Flanged Joints, Insulating Joints, And Other Joints (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)

Abstract

The present invention relates to pipe couplings which are used to couple pipes such as water service pipes to each other. A pipe coupling having a ring-shaped casing according to the present invention is constructed such that pipes can be separably coupled to each other through a simple process using the ring-shaped casing (20) and a sealing member (10), without using a separate nut and bolt. Therefore, there are advantages in that the pipe coupling process is simplified and the working time is reduced.

Description

Description PIPE COUPLING WITH DONUT TYPE CASE
Technical Field
[1] The present invention relates, in general, to pipe couplings, which have ring-shaped casings and are used to couple pipes, such as water service pipes to each other and, more particularly, to a pipe coupling, which is constructed such that pipes are separably coupled to each other through a simple process that does not use a separate nut and bolt, thus being convenient for a user. Background Art
[2] Generally, pipes are used to transport fluid such as water, oil, gas, etc. Because such pipes are typically manufactured to limited lengths, if pipes for transporting fluid are relatively long, many connection junction points between the pipes will be required. In this case, a separate pipe coupling is provided on each connection junction between the adjacent pipes such that the pipes can be tightly coupled to each other.
[3] Such pipe coupling, which couples pipes so that fluid can be transported therebetween, includes a pair of pipe connection members, which surround the outer surfaces of the facing ends of the pipes. To couple the pipe connection members to each other, locking bolts are inserted into locking holes of the pipe connection parts, and the bolts are tightened by nuts.
[4] The conventional pipe coupling having the above-mentioned construction is advantageous in that the pipes can be tightly coupled to each other. However, in a process of coupling the pipes to each other using the pipe coupling, separate nuts and bolts must be used to couple the pipe connection members to each other. Therefore, there are problems in that working time is high, and the bolts and nuts may undesirably become removed from the pipe connection members and be thus lost. Disclosure of Invention Technical Problem
[5] Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a pipe coupling having a ring-shaped casing which is constructed such that pipes can be removably coupled to the pipe coupling through a simple coupling process using the ring-shaped casing and a sealing member without using a separate nut and bolt, thus simplifying the pipe coupling process.
[6] Another object of the present invention is to provide a pipe coupling having the ring-shaped casing which includes the sealing member having contact sealing protrusions to prevent fluid, which flows through the pipes, from leaking out and to prevent foreign substances from entering the pipes when the pipes are coupled to the pipe coupling, so that the pipes can be reliably and watertightly coupled to the pipe coupling. Technical Solution
[7] In an aspect, the present invention provides a pipe coupling provided on a connection junction between opposite pipes to prevent fluid leakage, including: a sealing member, having a ring-shaped tube to surround outer surfaces of the opposite pipes, with a hollow space defined in the ring-shaped tube, a close contact part protruding from a medial portion of an inner surface of the ring-shaped tube to have a ring shape, the close contact part being brought into close contact with ends of the opposite pipes, a plurality of contact sealing protrusions provided on the inner surface of the ring-shaped tube at positions spaced apart from each other in a longitudinal direction at regular intervals, each of the contact sealing protrusions extending in a circumferential direction and being bent at an end thereof towards the close contact part such that the end of the contact sealing protrusion is brought into close contact with the outer surface of the corresponding pipe, and an inlet unit provided at a position in an outer surface of the ring-shaped tube, so that fluid is injected into the hollow space of the ring-shaped tube through the inlet unit to apply pressure to the inner surface of the ring-shaped tube; and a ring-shaped casing, having a casing body receiving and supporting the outer surface of the ring-shaped tube, bent parts formed by bending respective opposite ends of the casing body such that ends thereof are brought into contact with the outer surface of the respective pipes, and an inlet seating hole formed through the casing body at a position corresponding to the inlet unit of the sealing member, so that the inlet unit protrudes outside through the inlet seating hole.
[8] In another aspect, the present invention provides a pipe coupling provided on a connection junction between two pipes to prevent fluid leakage, including: a sealing member, having a ring-shaped receiving part to surround outer surfaces of the opposite pipes, a close contact part protruding from a medial portion of an inner surface of the ring-shaped receiving part to have a ring shape, the close contact part being in brought into close contact with ends of the opposite pipes, and a plurality of contact sealing protrusions provided on the inner surface of the ring-shaped receiving part at positions spaced apart from each other in a longitudinal direction at regular intervals, each of the contact sealing protrusions extending in a circumferential direction and being bent at an end thereof towards the close contact part such that the end of the contact sealing protrusion is brought into close contact with the outer surface of the corresponding pipe; and a ring-shaped casing, having a casing body having a ring shape and receiving the ring-shaped receiving part therein such that the casing body is disposed at a position spaced apart from an outer surface of the ring-shaped receiving part by a predetermined distance, bent parts formed by bending respective opposite ends of the casing body such that a hollow space is defined in a circumferential inner surface of the casing body and such that ends thereof are brought into contact with the outer surface of the respective pipes, the bent parts being in contact at inner surfaces thereof with respective opposite ends of the ring-shaped receiving part to seal the hollow space, and an inlet unit formed at a position in the casing body, so that fluid is injected into the hollow space through the inlet unit to apply pressure to the inner surface of the ring-shaped receiving part.
Advantageous Effects
[9] The pipe coupling having a ring-shaped casing according to the present invention makes it possible to separably couple pipes to each other through a simple process using the ring-shaped casing and a sealing member, without using a separate nut and bolt, thus being convenient for a user. [10] Furthermore, the pipe coupling having the ring-shaped casing according to the present invention includes the sealing member having contact sealing protrusions, which can effectively prevent fluid, which flows through the pipes, from leaking out and prevent foreign substances from entering the pipes when the pipes are coupled to the pipe coupling. Therefore, the pipes can be reliably and watertightly coupled to the pipe coupling.
Brief Description of the Drawings [11] FIG. 1 is a perspective view of a pipe coupling having a ring-shaped casing, according to a first embodiment of the present invention; [12] FIG. 2 is a perspective view showing pipes coupled to each other using the pipe coupling having the ring-shaped casing according to the first embodiment of the present invention; [13] FIG. 3 is a sectional view showing the pipes coupled to each other using the pipe coupling having the ring-shaped casing according to the first embodiment of the present invention; and [14] FIG. 4 is a sectional view showing pipes coupled to each other using a pipe coupling having a ring-shaped casing, according to a second embodiment of the present invention.
[15] <Description of the elements in the drawings>
[16] 1: pipe coupling 10: sealing member
[17] 12: ring-shaped tube 14: close contact part
[18] 6: contact sealing protrusion 18: inlet unit
[19] 18a: inlet hole 18b: inlet port [20] 18c: check valve 20: ring-shaped casing
[21] 22: casing body 24: bent part
[22] 26: inlet seating hole 28: inlet unit
[23] 28a: inlet hole 28b: inlet port
[24] 28c: check valve 50: sealing member
[25] 52: ring-shaped receiving part 54: close contact part
[26] 56: contact sealing protrusion 60: ring-shaped casing
[27] 62: casing body 64: bent part
[28] 68: inlet unit 68a: inlet hole
[29] 68b: inlet port 68c: check valve
[30] 70: pipe
Best Mode for Carrying Out the Invention
[31] In order to accomplish the above objects, a pipe coupling according to an embodiment of the present invention is provided on a connection junction between opposite pipes to prevent fluid leakage. The pipe coupling includes a sealing member and a ring-shaped casing. The sealing member includes a ring-shaped tube, which surrounds outer surfaces of the opposite pipes, with a hollow space defined in the ring- shaped tube, and a close contact part, which protrudes from a medial portion of an inner surface of the ring-shaped tube to have a ring shape. The close contact part is brought into close contact with ends of the opposite pipes. The sealing member further includes a plurality of contact sealing protrusions, which are provided on the inner surface of the ring-shaped tube at positions spaced apart from each other in a longitudinal direction at regular intervals. Each of the contact sealing protrusions extends in a circumferential direction and is bent at an end thereof towards the close contact part such that the end of the contact sealing protrusion is brought into close contact with the outer surface of the corresponding pipe. The sealing member further includes an inlet unit, which is provided at a position in an outer surface of the ring-shaped tube, so that fluid is injected into the hollow space of the ring-shaped tube through the inlet unit to apply pressure to the inner surface of the ring-shaped tube. The ring-shaped casing includes a casing body, which receives and supports the outer surface of the ring-shaped tube, bent parts, which are formed by bending respective opposite ends of the casing body such that ends thereof are brought into contact with the outer surface of the respective pipes, and an inlet seating hole, which is formed through the casing body at a position corresponding to the inlet unit of the sealing member, so that the inlet unit protrudes outside through the inlet seating hole.
[32] Meanwhile, a pipe coupling according to another embodiment of the present invention is provided on a connection junction between two pipes to prevent fluid leakage. The pipe coupling includes a sealing member and a ring-shaped casing. The sealing member includes a ring-shaped receiving part, which surrounds outer surfaces of the opposite pipes, and a close contact part, which protrudes from a medial portion of an inner surface of the ring-shaped receiving part to have a ring shape. The close contact part is in brought into close contact with ends of the opposite pipes. The sealing member further includes a plurality of contact sealing protrusions, which are provided on the inner surface of the ring-shaped receiving part at positions spaced apart from each other in a longitudinal direction at regular intervals. Each of the contact sealing protrusions extends in a circumferential direction and is bent at an end thereof towards the close contact part such that the end of the contact sealing protrusion is brought into close contact with the outer surface of the corresponding pipe. The ring-shaped casing includes a casing body, which has a ring shape and receives the ring-shaped receiving part therein such that the casing body is disposed at a position spaced apart from an outer surface of the ring-shaped receiving part by a predetermined distance, and bent parts, which are formed by bending respective opposite ends of the casing body such that a hollow space is defined in a circumferential inner surface of the casing body and such that ends thereof are brought into contact with the outer surface of the respective pipes. The bent parts are in contact at inner surfaces thereof with respective opposite ends of the ring-shaped receiving part to seal the hollow space. The ring-shaped casing further includes an inlet unit, which is formed at a position in the casing body, so that fluid is injected into the hollow space through the inlet unit to apply pressure to the inner surface of the ring-shaped receiving part.
[33] The inlet unit may include an inlet hole, which is formed at a predetermined position through the outer surface of the ring-shaped tube, an inlet port, which extends outwards from the inlet hole, the inlet port being seated through the inlet seating hole of the ring-shaped casing, and a check valve, which is provided at a predetermined position in the inlet port to prevent fluid, injected into the hollow space of the ring- shaped tube through the inlet port, from leaking out and to adjust an amount of fluid charged into the hollow space.
[34] Alternatively, the inlet unit may include an inlet hole, which is formed at a predetermined position in the casing body, an inlet port, which extends outwards from and is in close contact with an inner surface of the inlet hole, and a check valve, which is provided at a predetermined position in the inlet port to prevent fluid, injected into the hollow space of the ring-shaped casing, from leaking out and to adjust an amount of fluid charged into the hollow space.
[35] In addition, the ring-shaped tube or the ring-shaped receiving part may be made of elastic material, such as rubber, urethane, silicone, etc. [36] Furthermore, the ring-shaped casing may be made of plastic, iron, aluminum or stainless steel.
[37] Hereinafter, a pipe coupling according to a first embodiment of the present invention will be described in detail with reference to the attached drawings.
[38] FIG. 1 is a perspective view of the pipe coupling having a ring-shaped casing, according to the first embodiment of the present invention. FIG. 2 is a perspective view illustrating pipes coupled to each other using the pipe coupling having the ring-shaped casing according to the first embodiment of the present invention. FIG. 3 is a sectional view illustrating the pipes coupled to each other using the pipe coupling having the ring-shaped casing according to the first embodiment of the present invention.
[39] Referring to FIGS. 1 through 3, the pipe coupling 1 according to the first embodiment of the present invention, which is fitted over junction parts between two pipes 70 to prevent fluid leakage, includes a sealing member 10 for ensuring air- tightness, and a ring-shaped casing 20, which supports the sealing member 10.
[40] The sealing member 10 serves to increase contact sealing force between the pipes
70 when they are coupled to each other by the pipe coupling 1, such that the pipes 70 can be reliably and airtightly coupled to each other. The sealing member 10 includes a ring-shaped tube 12, a close contact part 14, contact sealing protrusions 16 and an inlet unit 18.
[41] The ring-shaped tube 12 has a ring shape to surround the outer surfaces of the opposite pipes 70, so that the pipes 70 are inserted into the ring-shaped tube 12. Furthermore, a hollow space is defined in the sidewall of the ring-shaped tube 12.
[42] Preferably, the ring-shaped tube 12 is made of elastic material, such as rubber, urethane, silicone, etc., such that it can be in close contact with the outer surface of the opposite pipes 70.
[43] The close contact part 14 protrudes from a medial portion of the inner surface of the ring-shaped tube 12 to have a ring shape. When the opposite pipes 70 are inserted into the ring-shaped tube 12, the ends of the pipes 70 are airtightly sealed at a medial position in the ring-shaped tube 12 by the close contact part 14.
[44] The contact sealing protrusions 16 serve to further increase the contact sealing force of the ring-shaped tube 12 when the opposite pipes 70 are coupled to each other by the pipe coupling 1, by which the pipes 70 are coupled to each other more tightly. Furthermore, the contact sealing protrusions 16 serve to prevent the pipes 70 from being undesirably removed from the pipe coupling 1. The contact sealing protrusions 16, each of which extends in a circumferential direction, are formed on the circumferential inner surface of the ring-shaped tube 12 at positions spaced apart from each other at regular intervals. The end of each contact sealing protrusion 16 is bent towards the close contact part 14 at a predetermined angle such that it is in close contact with the surface of the corresponding pipe 70.
[45] Meanwhile, fluid is injected into the hollow space in the ring-shaped tube 12 through the inlet unit 18, such that the circumferential inner surface of the ring-shaped tube 12 is compressed. The inlet unit 18 has an inlet hole 18a, which is formed at a predetermined position through the circumferential outer surface of the ring-shaped tube 12, and an inlet port 18b, which extends outwards from the inlet hole 18a and is seated through an inlet seating hole 26 of the ring-shaped casing 20, which will be explained later herein. The inlet unit 18 further has a check valve 18c, which is provided at a predetermined position in the inlet port 18b to prevent fluid in the hollow space of the ring-shaped tube 12 from leaking out through the inlet port 18b and to adjust the amount of fluid charged into the hollow space.
[46] A typical valve for controlling the supply or discharge of fluid is used as the check valve 18c. The construction thereof is well known in this art, and therefore further explanation is deemed unnecessary.
[47] The ring-shaped casing 20, which serves to support the sealing member 10, is made of hard material, such as reinforced plastic, steel, aluminum or stainless steel. The ring- shaped casing 20 includes a casing body 22, bent parts 24 and the inlet seating hole 26.
[48] The casing body 22 receives the ring-shaped tube 12 of the sealing member 10 therein and supports the circumferential outer surface of the ring-shaped tube 12. The casing body 22 has a ring shape, which has an inner diameter corresponding to the outer diameter of the ring-shaped tube 12, so that the casing body 22 is in close contact with the circumferential outer surface of the ring-shaped tube 12. The bent parts 24 are bent on the respective opposite ends of the casing body 22 such that the ends thereof are brought into contact with the outer surface of the corresponding pipes 70.
[49] The inlet seating hole 26 is formed through the casing body 22 such that the inlet port 18b of the inlet unit 18 protrudes outside through the inlet seating hole 26. For this, the inlet seating hole is formed at a position corresponding to the inlet port 18b of the inlet unit 18, so that the inlet port 18b is seated in the inlet seating hole 26 such that it protrudes outside the pipe coupling 1 through the inlet seating hole 26.
[50] The operation of the pipe coupling according to the first embodiment of the present invention will be described herein below.
[51] Referring to the drawings, in the pipe coupling 1 fitted over the connection junction between the two pipes 70 to prevent fluid leakage according to the first embodiment of the present invention, to couple two pipes 70 to each other, the two pipes 70 are inserted into the respective opposite ends of the ring-shaped tube 12, which is provided in the ring-shaped casing 20.
[52] Here, the opposite pipes 70 are inserted into the sealing member 10 along the inner surface of the ring-shaped tube 12 until the ends of the pipes 70 are brought into contact with the close contact part 14 of the sealing member 10. At this time, it is preferable for the ends of the pipes 70 to be brought into as close contact with the close contact part as possible.
[53] Then, the pipes 70 can more firmly contact the sealing member thanks to the contact sealing protrusions 16, which are provided on the inner surface of the ring- shaped tube 12. Therefore, fluid, which flows through the pipes 70, can be reliably prevented from leaking.
[54] Furthermore, because the contact sealing protrusions 16 are formed such that they are bent towards the close contact part 14 of the sealing member 10, the pipes 70 are easily inserted into the ring-shaped tube 12 and are prevented from being easily removed from the sealing member 10. In other words, the pipes can be more securely coupled to each other.
[55] Moreover, after the pipes 70 are completely inserted into the ring-shaped tube 12 of the sealing member 10, the check valve 18c is opened, and fluid is injected into the hollow space of the ring-shaped tube 12 through the inlet port 18b of the inlet unit 18 so that pressure is applied to the inner surface of the ring-shaped tube 12. Thereby, the watertightness of the contact of the pipes 70 and the ring-shaped tube 12 can be increased.
[56] As such, the pipe coupling 1 having the ring-shaped casing 20 according to the first embodiment of the present invention is constructed such that the pipes 70 can be separably coupled to each other using the ring-shaped casing 20 and the sealing member 10 through a simple process without using a separate nut and bolt, so that there is an advantage in that it is very convenient for the user.
[57] Furthermore, the present invention has the contact sealing protrusions 16, which serve to prevent the leakage of fluid that flows through the pipes 70 and the entrance of foreign substances into the pipes. Therefore, there is an advantage in that the pipes 70 can be coupled to the pipe coupling 1 more reliably and watertightly.
[58] FIG. 4 is a sectional view showing pipes coupled to each other using a pipe coupling having a ring-shaped casing, according to a second embodiment of the present invention.
[59] Referring to FIG. 4, the pipe coupling according to the second embodiment of the present invention, which is fitted over a junction between two pipes 70 to prevent water leakage, includes a sealing member 50 having a ring-shaped receiving part 52, in place of the sealing member 10 (shown in FIG. 3) having the ring-shaped tube 12 (shown in FIG. 3) of the first embodiment. Furthermore, unlike the first embodiment, in which the hollowing space is formed in the ring-shaped tube 12 (shown in FIG. 3), in the second embodiment, a hollow space is defined in a ring-shaped casing 60. In addition, unlike the first embodiment, in which the casing body 22 (shown in FIG. 3) of the ring-shaped casing 20 (shown in FIG. 3) is in close contact with and supports the outer surface of the ring-shaped tube 12 (shown in FIG. 3), the second embodiment is constructed such that a casing body 62 of a ring-shaped casing 60 is spaced apart from the outer surface of the ring-shaped receiving part 52 by a predetermined distance. The general construction of the second embodiment is the same as the first embodiment except for the above-mentioned structure.
[60] That is, the pipe coupling having the ring-shaped casing according to the second embodiment is characterized by the coupling between the sealing member 50 and the ring-shaped casing 60.
[61] The sealing member 50 includes the ring-shaped receiving part 52, which has a ring shape and surrounds the outer surfaces of opposite pipes 70, and a close contact part 54, which protrudes from the medial portion of the inner surface of the ring-shaped receiving part 52 to have a ring shape and is brought into close contact with the ends of the opposite pipes 70. The sealing member 50 further includes contact sealing protrusions 56, each of which extends in a circumferential direction, and which are formed on the circumferential inner surface of the ring-shaped receiving part 52 at positions spaced apart from each other at regular intervals. The end of each contact sealing protrusion 56 is bent towards the close contact part 54 at a predetermined angle such that it can be in close contact with the surface of the corresponding pipe 70.
[62] Preferably, the ring-shaped receiving part 52 is made of elastic material, such as rubber, ure thane, silicone, etc., such that it can be in close contact with the outer surface of the opposite pipes 70.
[63] The ring-shaped casing 60 includes the casing body 62, which has a ring shape and receives the ring-shaped receiving part 52 therein such that it is disposed at a position spaced apart from the outer surface of the ring-shaped receiving part 52 by a predetermined distance. The ring-shaped casing 60 further includes bent parts 64, which are bent on the respective opposite ends of the casing body 62 such that a hollow space is defined in the casing body 62 and the ends thereof are brought into contact with the outer surface of the corresponding pipes 70. In addition, the opposite ends of the ring- shaped receiving part 52 are in close contact with the inner surfaces of the respective bent parts 64 and thus seal the hollow space. The ring-shaped casing 60 further includes an inlet unit 68, which is formed at a predetermined position in the casing body 62, so that fluid is injected into the hollow space through the inlet unit to compress the circumferential inner surface of the ring-shaped receiving part 52.
[64] The inlet unit 68 serves as a passage for the injection of fluid into the hollow space of the ring-shaped casing 60 to apply pressure to the inner surface of the ring-shaped receiving part 52. The inlet unit 68 includes an inlet hole 68a, which is formed at a predetermined position in the casing body 62 of the ring-shaped casing 60, an inlet port 68b, which extends outwards from the inlet hole 68a in a state in which it is in close contact with the casing body 62, and a check valve 68c, which is provided at a predetermined position in the inlet port 68b to prevent fluid in the hollow space of the ring-shaped casing 60 from leaking out through the inlet port 68b and to adjust the amount of fluid charged into the hollow space.
[65] In the pipe coupling 1 having the ring-shaped casing according to the second embodiment of the present invention having the above-mentioned construction, to couple two pipes 70 to each other, the two pipes 70 are inserted into respective opposite ends of the ring-shaped receiving part 52, which is provided in the ring- shaped casing 20.
[66] Here, the opposite pipes 70 are inserted into the sealing member 50 along the inner surface of the ring-shaped receiving part 52, until the ends of the pipes 70 are brought into contact with the close contact part 54 of the sealing member 50. At this time, it is preferable that the ends of the pipes 70 be brought into as close contact with the close contact part as possible.
[67] Then, the pipes 70 can more firmly contact the sealing member thanks to the contact sealing protrusions 56, which are provide on the inner surface of the ring- shaped receiving part 52. Therefore, fluid, which flows through the pipes 70, can be reliably prevented from leaking.
[68] Furthermore, because the contact sealing protrusions 56 are formed such that they are bent towards the close contact part 54 of the sealing member 50, the pipes 70 are easily inserted into the ring-shaped receiving part 52 and are prevented from being easily removed from the sealing member 50. In other words, the pipes can be more firmly coupled to each other.
[69] Moreover, after the pipes 70 are completely inserted into the ring-shaped receiving part 52 of the sealing member 50, the check valve 68c is opened, and fluid is injected into the hollow space of the ring-shaped receiving part 52 through the inlet port 68b of the inlet unit 68 so that pressure is applied to the inner surface of the ring-shaped receiving part 52. Thereby, the watertightness of the contact of the pipes 70 and the ring-shaped receiving part 52 can be increased.
[70] As described above, the pipe coupling according to the present invention is constructed such that the pipes can be separably coupled to each other using the ring- shaped casing and the sealing member through a simple process that does not use a separate nut and bolt, so that there is an advantage in that it is very convenient for the user.
[71] Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. Industrial Applicability
[72] The pipe coupling according to the present invention makes it possible to separably couple pipes to each other through a simple process that does not require a separate nut and bolt, and can be applied to various kinds of pipes, such as water and sewage pipes, oil pipes, gas pipes, etc., for transporting fluid.

Claims

Claims
[1] A pipe coupling provided on a connection junction between opposite pipes to prevent fluid leakage, comprising: a sealing member, comprising a ring-shaped tube to surround outer surfaces of the opposite pipes, with a hollow space defined in the ring-shaped tube, a close contact part protruding from a medial portion of an inner surface of the ring- shaped tube to have a ring shape, the close contact part being brought into close contact with ends of the opposite pipes, a plurality of contact sealing protrusions provided on the inner surface of the ring-shaped tube at positions spaced apart from each other in a longitudinal direction at regular intervals, each of the contact sealing protrusions extending in a circumferential direction and being bent at an end thereof towards the close contact part such that the end of the contact sealing protrusion is brought into close contact with the outer surface of the corresponding pipe, and an inlet unit provided at a position in an outer surface of the ring-shaped tube, so that fluid is injected into the hollow space of the ring-shaped tube through the inlet unit to apply pressure to the inner surface of the ring-shaped tube; and a ring-shaped casing, comprising a casing body receiving and supporting the outer surface of the ring-shaped tube, bent parts formed by bending respective opposite ends of the casing body such that ends thereof are brought into contact with the outer surface of the respective pipes, and an inlet seating hole formed through the casing body at a position corresponding to the inlet unit of the sealing member, so that the inlet unit protrudes outside through the inlet seating hole.
[2] A pipe coupling provided on a connection junction between two pipes to prevent fluid leakage, comprising: a sealing member, comprising a ring-shaped receiving part to surround outer surfaces of the opposite pipes, a close contact part protruding from a medial portion of an inner surface of the ring-shaped receiving part to have a ring shape, the close contact part being in brought into close contact with ends of the opposite pipes, and a plurality of contact sealing protrusions provided on the inner surface of the ring-shaped receiving part at positions spaced apart from each other in a longitudinal direction at regular intervals, each of the contact sealing protrusions extending in a circumferential direction and being bent at an end thereof towards the close contact part such that the end of the contact sealing protrusion is brought into close contact with the outer surface of the corresponding pipe; and a ring-shaped casing, comprising a casing body having a ring shape and receiving the ring-shaped receiving part therein such that the casing body is disposed at a position spaced apart from an outer surface of the ring-shaped receiving part by a predetermined distance, bent parts formed by bending respective opposite ends of the casing body such that a hollow space is defined in a circumferential inner surface of the casing body and such that ends thereof are brought into contact with the outer surface of the respective pipes, the bent parts being in contact at inner surfaces thereof with respective opposite ends of the ring-shaped receiving part to seal the hollow space, and an inlet unit formed at a position in the casing body, so that fluid is injected into the hollow space through the inlet unit to apply pressure to the inner surface of the ring-shaped receiving part.
[3] The pipe coupling according to claim 1, wherein the inlet unit comprises an inlet hole formed at a predetermined position through the outer surface of the ring-shaped tube, an inlet port extending outwards from the inlet hole, the inlet port being seated through the inlet seating hole of the ring-shaped casing, and a check valve provided at a predetermined position in the inlet port to prevent fluid, injected into the hollow space of the ring-shaped tube through the inlet port, from leaking out and to adjust an amount of fluid charged into the hollow space.
[4] The pipe coupling according to claim 2, wherein the inlet unit comprises an inlet hole formed at a predetermined position in the casing body, an inlet port extending outwards from and being in close contact with an inner surface of the inlet hole, and a check valve provided at a predetermined position in the inlet port to prevent fluid, injected into the hollow space of the ring-shaped casing, from leaking out and to adjust an amount of fluid charged into the hollow space.
[5] The pipe coupling according to claim 1 or 2, wherein the ring-shaped casing is made of plastic, iron, aluminum or stainless steel.
PCT/KR2007/003768 2006-08-07 2007-08-06 Pipe coupling with donut type case WO2008018727A1 (en)

Applications Claiming Priority (2)

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KR2020060021072U KR200430628Y1 (en) 2006-08-07 2006-08-07 Pipe coupling
KR20-2006-0021072 2006-08-07

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KR101507467B1 (en) 2013-09-30 2015-03-31 주식회사 비젼개발 Water diverting hose coupling materials using distending pressure and water diverting apparatus with the same
KR102064228B1 (en) 2018-04-05 2020-01-09 조선대학교산학협력단 Low noise pipe to reduce drain noise

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