Joint sealing device using gas pressure and expansion tube

Abstract

The present invention is a sealing device for connecting two parts through which fluid flows, comprising: a first duct; a second duct connected to the first duct; a stopper installed at the end of the first duct and having a hole formed in communication with the first duct to form a conduit through which the fluid flows; a plurality of guides installed on one side of the stopper and having a ring shape into which the second duct can be inserted; an expansion tube fitted so as to be in close contact with both sides of at least one of the guides; a gas injection hole formed in the guide into which the expansion tube is fitted; and a gas inlet installed to communicate with the gas injection hole and for expanding the expansion tube to secure airtightness of the connection part, thereby such that when gas is injected through the gas inlet, the expansion space of the expansion tube expands, causing the expansion tube to apply pressure to the second duct and secure airtightness of the connection part.

Description

Technology Field

[0001] The present invention relates to a sealing device for a fastening part utilizing gas pressure and an expansion tube, and more specifically, to a sealing device for a fastening part utilizing gas pressure and an expansion tube applicable to an automatic fastening device, wherein the sealing is perfect in a fastening part connecting two parts through which fluid flows, while the fastening part can be easily disassembled and reconnected, thereby eliminating the inconvenience of frequent disassembly and reconnection of the fastening part. Background Technology

[0002] Hose clamps (hose bands) are commonly used for sealing connections between two fluid-carrying parts, such as ducts and ducts, gas cylinder outlets and tubes, and faucet outlets and hoses. Quick connectors (couplers) are also used to make connection and sealing work easier.

[0003] The connection method using the above hose clamp and quick connector is simple and inexpensive and is widely used, but since the connection is performed manually, there was a problem that it was inconvenient to use in situations where frequent disassembly and reconnection of the connection part was required.

[0004] Furthermore, in mass production facilities for inspecting or manufacturing parts, existing manual fastening methods pose a risk of safety accidents, can lead to reduced work efficiency and equipment misalignment, and present difficulties in being applied to automatic fastening devices. Prior art literature

[0005] Korean Patent Publication No. 10-2004-0043374 The problem to be solved

[0006] The present invention was devised to solve the above-mentioned problems, and aims to provide a new fastening sealing device applicable to automatic fastening devices, which eliminates the inconvenience of frequent disconnection / reconnection of the connection part by ensuring perfect sealing in a fastening part connecting two parts through which fluid flows while making it easy to dismantle and reconnect the fastening part. means of solving the problem

[0007] To achieve the above objectives, the present invention provides a fastening sealing device for connecting two parts through which fluid flows, comprising: a first duct; a second duct connected to the first duct; a stopper installed at the end of the first duct and having a hole formed in communication with the first duct to form a conduit through which the fluid flows; a plurality of guides installed on one side of the stopper and having a ring shape into which the second duct can be inserted; an expansion tube fitted so as to be in close contact with both sides of at least one of the guides and having an inner diameter smaller than the inner diameter of the guide so as to form a predetermined expansion space between the inner surface of the guide and the expansion tube; a gas injection hole formed in the guide into which the expansion tube is fitted; and a gas inlet installed to communicate with the gas injection hole and for expanding the expansion tube to secure airtightness of the fastening part, wherein when gas is injected through the gas inlet, the expansion space of the expansion tube expands, causing the expansion tube to apply pressure to the second duct and secure airtightness of the fastening part.

[0008] A gasket may be further installed between the stopper and the guide to prevent fluid leakage and to fix and cushion the guide.

[0009] An extension piece for installing a stopper in the first duct is integrally provided at the end of the first duct, so that a stopper can be installed in the first duct using a bolt.

[0010] Meanwhile, the guide and the expansion tube are characterized by being bolted to the stopper using annularly arranged fastening holes.

[0011] In the present invention, the expansion tube has a 'U'-shaped cross-sectional shape, and the expansion space can expand and make surface contact with the second duct to form a seal.

[0012] In addition, the expansion tube may be provided to make surface contact with the second duct in multiple stages.

[0013] In this case, multiple expansion tubes may be installed on the guide, or the inner diameter shape of the expansion tube for surface contact with the second duct may be formed in multiple stages.

[0014] Meanwhile, an indicator line can be formed on the inner surface of the expansion tube to visually check whether the expansion tube is inflated.

[0015] The above indicator line consists of a first indicator line formed at the center of the inner surface of the expansion tube and a second indicator line formed at a predetermined distance from the first indicator line, and the first indicator line and the second indicator line are made of different colors so that when the expansion tube expands and comes into surface contact with the second duct, the degree of expansion can be checked by the presence or absence of the first indicator line or the second indicator line.

[0016] In the present invention, gas can be injected and discharged at a constant pressure from the gas inlet through an electric regulator for electric gas injection.

[0017] Here, an automatic fastening device that ensures airtightness can be configured by moving the second duct to a specific position in the direction of the first duct and then automatically injecting gas through the electric regulator.

[0018] In addition, when there are multiple gas inlets, the electric regulator is characterized by installing lines to each gas inlet so that gas injection and discharge can be performed simultaneously.

[0019] In the present invention, the end of the second duct may be provided with a tapered ring-shaped support to assist in proper position control between the second duct and the expansion tube and stable sealing of the expansion tube.

[0020] In addition, it may further include a sensor capable of checking for any abnormalities in the expansion tube. Effects of the invention

[0021] According to the present invention described above, in a connecting part that connects two parts through which fluid flows, the sealing is perfectly achieved, and the connecting part can be easily disassembled and reconnected, thereby eliminating the inconvenience of frequent disassembly / reconnection of the connecting part.

[0022] In addition, it eliminates the risk of safety accidents in mass production facilities for inspecting or manufacturing parts, prevents a decrease in work efficiency and equipment misalignment, and is effective for application to automatic fastening devices. Brief explanation of the drawing

[0023] FIG. 1 is a perspective view illustrating an embodiment of a fastening part sealing device according to the present invention. FIG. 2 is an exploded perspective view illustrating the sealing device of the fastening part in FIG. 1. FIG. 3 is a front view illustrating a fastening part sealing device according to the present invention. FIG. 4 is a cross-sectional view illustrating a fastening part sealing device according to the present invention. FIG. 5 is a cross-sectional view illustrating the combined state of the fastening sealing device in the present invention. FIG. 6 is a perspective view and a front view illustrating an expansion tube in the present invention. FIG. 7 is a perspective view illustrating another embodiment of a fastening part sealing device according to the present invention. FIG. 8 is a front view illustrating another embodiment in which a guide line is formed on the expansion tube of the present invention. FIG. 9 is a front view illustrating another form of the fastening sealing device of the present invention. FIG. 10 is a conceptual diagram showing the direction of fluid flow during fastening and unfastening in a fastening sealing device according to the present invention. Specific details for implementing the invention

[0024] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, it should be noted that in assigning reference numerals to the components of each drawing, the same components are given the same reference numeral whenever possible, even if they are shown in different drawings. At this time, the configuration and operation of the present invention illustrated in the drawings and described thereby are described as at least one embodiment, and the technical concept of the present invention and its core configuration and operation are not limited by this.

[0025] FIG. 1 is a perspective view illustrating an embodiment of a fastening part sealing device according to the present invention, and FIG. 2 is an exploded perspective view illustrating the fastening part sealing device of FIG. 1.

[0026] The present invention relates to a sealing device applicable to a connection part connecting two parts through which fluid flows, for example, a duct and a duct, a gas cylinder outlet and a tube, a faucet outlet and a hose, etc. In this invention, the application to a connection part connecting two ducts is described as an example, but the present invention is not limited thereto and can be applied to various technical fields.

[0027] As illustrated in FIGS. 1 and 2, the sealing device for a fastening part of the present invention comprises a first duct (10), a second duct (20) connected to the first duct (10), a stopper (30) installed at the end of the first duct (10), a plurality of guides (40) installed on one side of the stopper (30), an expansion tube (50) fitted so as to be in close contact with both sides of at least one of the guides, and a gas inlet (60) for expanding the expansion tube (50) to ensure airtightness of the fastening part.

[0028] The first duct (10) is a tubular member through which fluid can flow, and an extension piece (80) for installing a stopper (30) at the end of the first duct (10) may be provided.

[0029] The above extension piece (80) is installed in the first duct (10) by means such as welding so as to be integrally provided at the end of the first duct (10), and is formed in a ring shape having a larger diameter than the first duct (10) so that fluid can flow between the first duct (10) and the second duct (20), and allows a stopper (30) to be installed in the first duct (10) using a bolt (not shown).

[0030] The stopper (30) is installed at the end of the first duct (10) through the extension piece (80), and the stopper (30) also has a hole (32) formed in communication with the first duct (10) to form a conduit through which fluid flows.

[0031] The stopper (30) can serve to stop the insertion of the second duct (20) when the second duct (20) is connected, and for this purpose, it is preferable that the hole (32) be formed smaller than the outer diameter of the second duct (20).

[0032] Meanwhile, on one side of the stopper (30), a plurality of guides (40) having a ring shape into which the second duct (20) can be inserted are provided.

[0033] FIG. 3 is a front view illustrating a fastening part sealing device according to the present invention, FIG. 4 is a cross-sectional view illustrating a fastening part sealing device according to the present invention, FIG. 5 is a cross-sectional view illustrating a state in which the fastening part sealing device according to the present invention is coupled, and FIG. 6 is a perspective view and a front view illustrating an expansion tube according to the present invention.

[0034] In the fastening device presented as an embodiment of the present invention, the guide (40) is composed of three guides, and an expansion tube (50) is fitted into the guide (44) located in the center among the guides (42), (44), and (46).

[0035] The above expansion tube (50) is formed to have a 'U'-shaped cross-sectional shape and is inserted between a guide (44) located in the center and two guides (42) (46) installed on both sides of the guide (44) so ​​as to be in close contact with both sides of the guide (44).

[0036] The above expansion tube (50) is made of a rubber material such as EPDM and is inserted between each guide (42)(440(46)) to function as a gasket to prevent leakage.

[0037] Additionally, the expansion tube (50) is formed with a shape having an inner diameter smaller than the inner diameter of the guide (44) so ​​that a predetermined expansion space (54) is formed between it and the inner surface of the guide (44).

[0038] The above-mentioned expansion tube (50) expands when gas is injected into the expansion space (54) and can come into surface contact with the second duct (20), thereby allowing sealing to be formed at the connection part between the first duct (10) and the second duct (20).

[0039] Meanwhile, a gasket (70) may be further installed between the stopper (30) and the guide (40) to prevent fluid leakage and to fix and cushion the guide.

[0040] It is also preferable that the above gasket (70) be made of rubber material.

[0041] Meanwhile, the gasket (70), three guides (42)(44)(46) and the expansion tube (50) are formed with annularly arranged fastening holes (46a)(50a)(70a), and are characterized by being bolted to the stopper (30) using the fastening holes (46a)(50a)(70a).

[0042] Meanwhile, a gas injection hole (44b) is formed in the central guide (44) into which the expansion tube (50) is fitted, and a gas injection port (60) is installed in the gas injection hole (44b) to expand the expansion tube (50) and secure airtightness of the fastening part.

[0043] As shown in FIG. 5, the sealing device for the fastening part of the present invention allows for the second duct (20) to be inserted into the guide and then gas to be injected through the gas inlet (60), thereby expanding the expansion space of the expansion tube (50), causing the expansion tube (50) to apply pressure to the second duct (20) and making surface contact, thereby ensuring airtightness of the fastening part.

[0044] Furthermore, the sealing device of the fastening part of the present invention may be provided with a tapered ring-shaped support (not shown) at the end of the second duct (20) to help with proper position control between the second duct (20) and the expansion tube (50) and stable sealing of the expansion tube.

[0045] In addition, a sensor capable of checking for abnormalities in the expansion tube (50) may be further included.

[0046] The usable temperature of the sealing device of the fastening part of the present invention is determined by the material of the gasket (70) and the expansion tube (50), and can be applied to various facilities operating at about 140°C or lower when using widely used EPDM.

[0047] For example, in the case of fuel cell systems, it can be used as an experimental evaluation device for PEMFCs operating at about 80°C or lower, or as a quality control device for mass-produced products.

[0048] Meanwhile, for more perfect sealing, the sealing device of the fastening part of the present invention may be configured so that the expansion tube makes surface contact with the second duct in multiple stages.

[0049] FIG. 7 is a perspective view illustrating another embodiment of a sealing device for a fastening part according to the present invention, showing that a plurality of expansion tubes (150)(152)(154) are installed to make surface contact with the second duct in multiple stages.

[0050] That is, multiple of the above-mentioned expansion tubes are installed to make surface contact with the above-mentioned second duct in multiple stages.

[0051] In this case, as shown in FIG. 7, the number of guides can be set to 7, and three expansion tubes (150)(152)(154) can be installed between each guide, and gas inlets (160)(162)(164) can be installed in each of the three expansion tubes (150)(152)(154) to inject gas into the three expansion tubes, thereby allowing them to come into surface contact with the second duct on three sides.

[0052] In addition, although not illustrated in the present invention, the inner diameter shape of the expansion tube for surface contact with the second duct may be formed in a shape capable of forming multiple contact surfaces in addition to a 'U' shape.

[0053] Meanwhile, an indicator line that allows visual confirmation of whether the expansion tube is expanded may be formed on the inner surface of the expansion tube.

[0054] FIG. 8 is a front view illustrating another embodiment in which an indicator line is formed on the expansion tube of the present invention, and illustrates an embodiment in which an indicator line (252) (254) is formed on the inner circumference of the expansion tube (250) so that the expansion of the expansion tube (250) can be visually checked.

[0055] The above indicator line may consist of a first indicator line (252) formed in the center of the inner circumference of the expansion tube (250) and a second indicator line (254) formed at a predetermined distance from the first indicator line (252).

[0056] At this time, the first indicator line (252) and the second indicator line (254) are made of different colors, so that when the expansion tube (250) expands and comes into surface contact with the second duct, the degree of expansion can be checked by the presence or absence of the first indicator line or the second indicator line.

[0057] For example, if the expansion tube (250) expands and comes into surface contact with the second duct, the first indicator line (252) is not visible to the naked eye and only the second indicator line (254) of a different color is visible, then it is possible to know whether the expansion tube (250) has expanded.

[0058] FIG. 9 is a front view illustrating another form of the fastening sealing device of the present invention.

[0059] As illustrated in FIG. 9, the fastening sealing device of the present invention can be formed in various forms in addition to the form previously illustrated. For example, depending on the structure and form of the equipment to which the fastening sealing device of the present invention is applied, the expansion tube and guide can be applied and used in various forms such as circular, polygonal, and elliptical shapes.

[0060] Meanwhile, the fastening sealing device of the present invention can be applied to an automatic fastening device.

[0061] That is, by moving the second duct (20) in the direction of the first duct (10) using a motor or the like, stopping at a specific location, and configuring it to automatically inject gas, an automatic fastening device with airtightness can be configured.

[0062] FIG. 10 is a conceptual diagram showing the fluid flow direction when fastening and unfastening in a fastening sealing device according to the present invention. By injecting and discharging gas at a constant pressure from the gas inlet (144b) through an electric regulator (EPC) for electric gas injection, the fastening part can be automatically disassembled and reconnected.

[0063] In addition, when there are multiple gas inlets (144b), lines are installed in the electric regulator (EPC) at each gas inlet (144b) to allow for the injection and discharge of gas at once, thereby enabling the disassembly and reconnection of the connection part to be performed automatically and eliminating the inconvenience of frequent disassembly / reconnection of the connection part.

[0064] In addition, by applying it to automatic fastening systems instead of existing manual fastening methods, it eliminates the risk of safety accidents in mass production facilities used for inspecting or manufacturing parts, and effectively prevents a decrease in work efficiency and equipment misalignment.

[0065] The foregoing description is merely an illustrative explanation of the technical concept of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and variations within the scope of the essential characteristics of the present invention. Furthermore, the embodiments disclosed in the present invention are intended to explain, not limit, the technical concept of the present invention, and the scope of the technical concept of the present invention is not limited by such embodiments. The scope of protection of the present invention shall be interpreted by the claims below, and all technical concepts within an equivalent scope shall be interpreted as being included within the scope of rights of the present invention. Explanation of the symbols

[0066] 10: 1st Duct 20: 2nd Duct 30: Stopper 40: Guide 50: Inflatation tube 54: Inflatation space 60: Gas inlet 70: Gasket 80: Extended Episode

Claims

Claim 1 A sealing device for a connecting part connecting two parts through which fluid flows, comprising: a first duct; a second duct connected to the first duct; a stopper installed at the end of the first duct and having a hole formed in communication with the first duct to form a conduit through which the fluid flows; a plurality of guides having a ring shape into which the second duct can be inserted, installed on one surface of the stopper; an expansion tube fitted so as to be in close contact with both sides of at least one of the guides and having an inner diameter smaller than the inner diameter of the guide so as to form a predetermined expansion space between the inner surface of the guide and the expansion tube; a gas injection hole formed in the guide into which the expansion tube is fitted; and a gas inlet installed to communicate with the gas injection hole and for expanding the expansion tube to ensure airtightness of the connecting part. A sealing device for a fastening part, comprising: a gas inlet; wherein when gas is injected through the gas inlet, the expansion space of the expansion tube expands, causing the expansion tube to apply pressure to the second duct and secure airtightness of the fastening part; wherein the stopper contacts the second duct while stopping the insertion of the second duct into the first duct; and wherein the individual guide and the expansion tube are bolted to the stopper using a fastening hole that is arranged in an annular shape and located at the same horizontal level; wherein the expansion tube has a 'U'-shaped cross-sectional shape, and the expansion space expands to come into surface contact with the second duct, and wherein, when the expansion space expands, the outer surface of the expansion tube is exposed through the area between at least one guide and the second duct when viewed from a direction perpendicular to the longitudinal direction of the second duct from the opposite side of the first duct. Claim 2 A fastening part sealing device according to claim 1, characterized in that a gasket is further installed between the stopper and the guide to prevent fluid leakage and to fix and cushion the guide. Claim 3 A fastening part sealing device according to claim 1, characterized in that an extension piece for installing a stopper in the first duct is integrally provided at the end of the first duct. Claim 4 delete Claim 5 delete Claim 6 A sealing device for a fastening part according to claim 1, characterized in that the expansion tube is provided to make surface contact with the second duct in multiple stages. Claim 7 A sealing device for a fastening part according to claim 6, wherein the expansion tubes are installed in multiple numbers on the guide, or the inner diameter shape of the expansion tubes for surface contact with the second duct is formed in multiple stages. Claim 8 A sealing device for a fastening part according to claim 1, characterized in that an indicator line is formed on the inner surface of the expansion tube to visually check whether the expansion tube is expanded. Claim 9 A sealing device for a fastening part according to claim 8, wherein the indicator line comprises a first indicator line formed in the center of the inner circumferential surface of the expansion tube and a second indicator line formed at a predetermined distance from the first indicator line, and wherein the first indicator line and the second indicator line are of different colors, so that when the expansion tube expands and comes into surface contact with the second duct, the degree of expansion can be confirmed by the presence or absence of the first indicator line or the second indicator line. Claim 10 A sealing device for a fastening part according to claim 1, characterized in that gas is injected and discharged at a constant pressure at the gas inlet through an electric regulator for electric gas injection. Claim 11 A sealing device for a fastening part according to claim 10, characterized by configuring an automatic fastening device that ensures airtightness by moving the second duct to a specific position in the direction of the first duct and then automatically injecting gas through the electric regulator. Claim 12 A sealing device for a fastening part according to claim 10, wherein, when there are multiple gas inlets, lines are installed in the electric regulator at each gas inlet to allow for the injection and discharge of gas at once. Claim 13 A sealing device for a fastening part according to claim 1, characterized in that the end of the second duct is provided with a tapered ring-shaped support to assist in proper position control between the second duct and the expansion tube and stable sealing of the expansion tube. Claim 14 A sealing device for a fastening part according to claim 1, further comprising a sensor capable of checking for abnormalities in the expansion tube.

Images