Pipe connecting device

Abstract

A pipe connecting device according to the present invention includes: a fitting unit that has a predetermined length, has insertion openings formed at both ends into which pipes are inserted, has an insertion space on the inside, and has first seating grooves and second seating grooves provided along the inner circumferential surface, the first seating grooves positioned respectively on both sides adjacent to the insertion openings and the second seating grooves spaced inward from respective first seating grooves; grip members provided in either the first seating grooves or the second seating grooves to press and fix the pipes; and sealing members provided in the remaining seating grooves not occupied by the grip members, so as to maintain airtightness between the fitting unit and the pipe, wherein each grip member is formed as an integrated member in which a plate body having a predetermined width along the pipe insertion direction forms an arc shape with a predetermined curvature, and includes a seating portion that seats in either the first seating groove or the second seating groove, and a grip portion that extends inward from the seating portion, the seating part and grip part being provided repeatedly along the arc.

Description

pipe connector

[0001] The present invention relates to a pipe connecting device, and more particularly, to a pipe connecting device that firmly connects a pair of pipes to each other so as to maintain airtightness.

[0002]

[0003] Pipe connectors are generally used to connect various types of pipes used in construction and civil engineering, and these pipe connectors are formed in various shapes depending on the size and type of pipe.

[0004] In the case of large-diameter pipe connections, a receiving space is formed inside the connector into which the pipe is inserted, and an index ring and a grip ring are provided in the receiving space. Accordingly, after the pipe is inserted into the connector, the grip ring is compressed to penetrate the outer surface of the pipe, thereby securing the pipe.

[0005] For small-diameter pipe connections, a sealing ring is inserted into the connector into which the pipe is inserted, and then the pipe is inserted to connect the pipe. In this case, the sealing ring presses against the outer surface of the pipe, preventing leakage of fluid flowing inside the pipe.

[0006] However, since the conventional small-diameter pipe connection as described above is formed so that the index ring has elasticity, the shape is easily deformed due to changes in angle caused by the load of the pipe or external force, and therefore it is difficult to stably fix the pipe.

[0007] To compensate for this, separate fixing devices were installed at the connection between pipes, but this not only made installation cumbersome, but also increased the time and cost required for construction.

[0008] Therefore, a method to solve these problems is required.

[0009]

[0010] The present invention is an invention devised to solve the problems of the above-described prior art, and has the purpose of providing a pipe connecting device that can greatly improve the index force and firmly fix the pipe.

[0011] It also aims to provide a pipe connection device that is simple in configuration and easy to install.

[0012] The tasks of the present invention are not limited to the tasks mentioned above, and other tasks not mentioned will be clearly understood by those skilled in the art from the description below.

[0013]

[0014] In order to achieve the above object, the pipe connecting device of the present invention comprises a fitting unit having an insertion hole formed on both sides with a constant length into which a pipe is inserted, an insertion space therein, and a first mounting groove and a second mounting groove formed spaced inward from the first mounting groove on both sides adjacent to the insertion hole along an inner circumference thereof, a grip member provided in one of the first mounting groove or the second mounting groove to press and fix the pipe, and a sealing member provided in one of the first mounting groove or the second mounting groove where the grip member is not located to maintain airtightness between the fitting unit and the pipe, wherein the grip member is formed as an integral member in which a plate having a constant width along the insertion direction of the pipe forms an arc shape with a constant curvature, and a mounting portion mounted in the first mounting groove or the second mounting groove and a grip portion extending inward from the mounting portion are repeatedly provided.

[0015] In addition, the grip member is formed to be seated in the first seating groove and have a non-closed shape with a portion of the circumference open, so that the diameter can be reduced by compression applied to the outer surface of the fitting unit to compress the pipe.

[0016] In addition, the grip member is pressed in a form in which the circumference is reduced and moves to the first mounting groove or the second mounting groove to expand, and the fitting unit can be compressed while the pipe is inserted into the insertion port.

[0017] In addition, the grip member may be configured to have an elastic restoring force in the outer radial direction so as not to exceed the elastic limit due to deformation.

[0018] In addition, the grip member may be formed so that the initial curvature is relatively larger than the inner diameter of the first and second mounting grooves.

[0019] Additionally, the grip member may be configured to be contractible into a circle having a diameter smaller than the insertion port.

[0020] In addition, the grip member may have a width smaller than the width in the longitudinal direction of the first and second mounting grooves, and may be characterized in that the grip member is deformed along the tensile direction when the pipe is tensioned in the direction in which it is detached from the fitting unit.

[0021] In addition, the end of the grip portion may be characterized by having a tapered shape in which the inner side is longer than the outer side in the direction of the pipe into which it is inserted.

[0022] Additionally, the grip portion may be formed in a polygonal or semicircular shape with a portion protruding toward the pipe.

[0023] In addition, the sealing member is formed to have elasticity and is seated in the second seating groove, and can be formed in a ring shape.

[0024] Additionally, the longitudinal cross-section of the sealing member may include a main sealing area of ​​a preset shape.

[0025] Additionally, the longitudinal section of the sealing member may further include an auxiliary sealing area protruding outward from the main sealing area.

[0026] In addition, the fitting unit may include a first member mounting portion having the first mounting groove formed on the inner surface, a second member mounting portion having the second mounting groove formed on the inner surface, a groove separation portion formed between the first member mounting portion and the second member mounting portion, and an inner extension portion formed to extend inward from the second member mounting portion.

[0027] Additionally, the fitting unit may further include an outer extension portion extending outward from the first member mounting portion.

[0028] Additionally, the first member mounting portion and the second member mounting portion may be formed to have an outer diameter larger than the groove separation portion and the inner extension portion.

[0029] In addition, a pressurizing unit may be further included that is mounted to surround the outer surface of the fitting unit and pressurizes it.

[0030] In addition, the pressurizing unit may include a pressurizing body that has a mounting space formed therein into which the fitting unit is inserted and wraps around the outer surface of the fitting unit to apply pressure.

[0031] In addition, the first member mounting portion and the second member mounting portion are formed to have an outer diameter larger than the groove separation portion and the inner extension portion, and the pressurized body may have a first recessed groove in which the first member mounting portion is mounted and a second recessed groove in which the second member mounting portion is mounted formed along the inner circumference.

[0032]

[0033] The pipe connecting device of the present invention for solving the above-mentioned problem has the following effects.

[0034] First, it has the advantage of being able to stably fix the pipes by the grip member and sealing member that come into contact with each pipe fixed to the fitting unit, and also of being able to greatly improve the airtightness.

[0035] Second, at this time, the grip member of the present invention is configured to be stably reduced and expanded in the circumferential direction by being made of an elastic material so that a portion of the circumference is not connected, so that it can be easily inserted into the fitting unit and the pipe can be stably pressurized.

[0036] Third, it has the advantage of being simple to construct as it does not require separate fixing devices, and the installation method is very easy, which can drastically reduce construction time and costs.

[0037] The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

[0038]

[0039] FIG. 1 is a drawing showing the external appearance of a pipe connecting device according to one embodiment of the present invention;

[0040] FIG. 2 is a drawing showing the internal structure of a pipe connecting device according to one embodiment of the present invention;

[0041] FIG. 3 is a drawing showing the appearance of a fitting unit in a pipe connecting device according to one embodiment of the present invention;

[0042] FIG. 4 and FIG. 5 are drawings showing the appearance of a grip member in a pipe connecting device according to one embodiment of the present invention;

[0043] FIG. 6 is a drawing showing a state in which a grip member is coupled to a fitting unit in a pipe connecting device according to one embodiment of the present invention;

[0044] FIG. 7 is a drawing showing the appearance of a sealing member in a pipe connecting device according to one embodiment of the present invention;

[0045] FIG. 8 is a drawing showing the appearance of a pressurizing unit in a pipe connecting device according to one embodiment of the present invention;

[0046] FIG. 9 is a drawing showing a pipe connecting device according to one embodiment of the present invention, in which a pressurizing unit is mounted on a fitting unit;

[0047] Figures 10 and 11 are drawings showing the shape in which the grip unit is deformed when the pipe is pulled outward in the pipe connecting device of the present invention; and

[0048] Figures 12 and 13 are drawings showing another embodiment of a fitting unit in a pipe connecting device of the present invention.

[0049]

[0050] Hereinafter, preferred embodiments of the present invention, which can specifically realize the objectives of the present invention, will be described with reference to the attached drawings. In describing the present embodiments, identical names and symbols will be used for identical components, and additional descriptions thereof will be omitted.

[0051] Fig. 1 is a drawing showing the external appearance of a pipe connecting device according to one embodiment of the present invention, and Fig. 2 is a drawing showing the internal structure of a pipe connecting device according to one embodiment of the present invention.

[0052] And Figure 3 is a drawing showing the appearance of a fitting unit in a pipe connecting device according to one embodiment of the present invention.

[0053] FIG. 1 is a drawing showing the external appearance of a pipe connecting device according to one embodiment of the present invention;

[0054] As illustrated in FIGS. 1 to 3, a pipe connecting device according to one embodiment of the present invention includes a fitting unit (100), a grip member (200), and a sealing member (300).

[0055] The above fitting unit (100) has an insertion space (S1) formed inside so that different pipes (P: see Fig. 9) can be inserted on both sides, and is formed in a tubular shape overall.

[0056] In particular, in the present embodiment, the fitting unit (100) has a certain length, insertion holes are formed on both sides, and has a shape symmetrical in both directions based on a center line along the length direction, and forms the insertion space (S1) in a hollow shape inside.

[0057] And, on each side of the fitting unit (100), a first mounting groove (112a) arranged adjacent to the insertion port and a second mounting groove (114a) formed spaced inward from the first mounting groove (112a) are formed along the inner circumference. At this time, one of the grip member (200) and the sealing member (300) is provided in the first mounting groove (112a), and the other one is provided in the second mounting groove (114a).

[0058] More specifically, in this embodiment, the fitting unit (100) has a form including a first member mounting portion (112) having the first mounting groove (112a) formed on the inner surface, a second member mounting portion (114) having the second mounting groove (114a) formed on the inner surface, a groove separation portion (113) formed between the first member mounting portion (112) and the second member mounting portion (114), an inner extension portion (111) formed at the center of the fitting unit (100) and extending inwardly from the second member mounting portion (114), and an outer extension portion (116) extending outwardly from the first member mounting portion (112).

[0059] That is, the fitting unit (100) has a form in which the inner extension portion (111), the second member mounting portion (114), the groove separation portion (113), the first member mounting portion (112), and the outer extension portion (116) are sequentially connected from the center in the longitudinal direction to the outside.

[0060] And in this embodiment, the first member mounting portion (112) and the second member mounting portion (114) are formed to have an outer diameter larger than the groove separation portion (113), the outer extension portion (116), and the inner extension portion (111). Accordingly, the fitting unit (100) is formed in an overall tubular shape, but has a form in which a plurality of protrusions are formed on the outer surface.

[0061] In the present embodiment, the fitting unit (100) is formed with one first member mounting portion (112) and one second member mounting portion (114) on each side, but is not limited thereto, and the first member mounting portion (112) and the second member mounting portion (114) may be formed in multiple numbers. In such a case, the grip member (200) or the sealing member (300) may also be provided in multiple numbers.

[0062] In addition, in this embodiment, the length of the inner extension portion (111) may be formed longer than the length of the groove separation portion (113). The reason for this is to form the internal space of the inner extension portion (111) wider, thereby preventing the end of the pipe (P) inserted into the fitting unit (100) from being deformed by the pressing force of the pressing unit (400, see FIG. 8) described later.

[0063] And, on the inner surface of the center of the above fitting unit (100), a protrusion protruding to a predetermined height can be formed. This is to limit the maximum insertion depth of the pipe (P).

[0064] Referring to FIGS. 4 to 6, the grip member (200) in the pipe connecting device according to one embodiment of the present invention will be described as follows.

[0065] In the present invention, the grip member (200) is a component that is provided in either the first mounting groove (112a) or the second mounting groove (114a) and presses and fixes the pipe (P).

[0066] As illustrated in FIGS. 4 and 5, the grip member (200) is seated in the first seating groove (112a) and is formed in a shape in which a portion of the circumference is open and has a non-closed shape. In other words, the grip member (200) is formed in an unfinished ring shape with an opening formed in a portion of the entire circumference.

[0067] Accordingly, the grip member (200) can be deformed and its diameter can be reduced by the compression applied to the outer surface of the fitting unit (100), and the pipe (P) inserted into the fitting unit (100) can be fixed by compression.

[0068] At this time, the grip member (200) is formed as an integral member in which a plate having a certain width along the insertion direction of the pipe (P) has a certain curvature and forms an arc shape, and a mounting portion (210) that is mounted on the first mounting groove (112a) and a grip portion (220) that extends inward from the mounting portion (210) are repeatedly provided.

[0069] The above grip portion (220) is a portion that protrudes toward the pipe (P), and is configured to surround and contact the outer surface of the pipe (P) when the pipe (P) is inserted inside the fitting unit (100), and then be compressed and deformed to apply pressure.

[0070] At this time, the grip portion (220) may be formed in various shapes, such as a polygonal or semicircular shape, with the portion protruding toward the pipe (P).

[0071] And the above-mentioned fixing portion (210) is formed in a non-closed circular shape with a configuration that allows the grip portion (220) to maintain a stable shape at a certain interval. At this time, the fixing portion (210) has elasticity above a certain level and is restored to its initial state through restoring force when deformed.

[0072] That is, the grip member (200) is formed by repeatedly forming a mounting portion (210) and a grip portion (220) by bending a plate-shaped metal member and is mounted in the first mounting groove (112a).

[0073] Specifically, as illustrated in FIG. 5, the grip member (200) is formed to have a non-closed shape with a portion of the circumference open, so that the diameter is reduced by the compression applied to the outer surface of the fitting unit (100), thereby compressing the pipe (P).

[0074] At this time, the grip member (200) has a certain level of elasticity and is compressible along the circumference, and is restored due to elasticity when the external force is released.

[0075] Accordingly, the grip member (200) according to the present invention is pressed in a form in which the circumference is reduced, moves to the first mounting groove (112a) or the second mounting groove (114a), expands, and is mounted inside.

[0076] Thereafter, when the pipe (P) is introduced into the insertion space (S1) through the insertion port, the grip member (200) is positioned to surround the circumference of the pipe (P) while being seated in the first seating groove (112a).

[0077] The grip member (200) configured as described above has a certain level of elasticity and is configured to be deformed, but is configured so that the deformation does not exceed the elastic limit, and thus has an elastic restoring force in the outer radial direction.

[0078] Next, referring to FIG. 6, a state in which the grip member (200) is seated inside the fitting unit (100) is examined. First, as shown in FIG. 5, the grip member (200) is pressed by an external force to reduce its circumference. Here, the grip member (200) is formed with a curvature in a reduced circumference state to be relatively larger than the inner diameters of the first seating groove (112a) and the second seating groove (114a), and is contracted into a circle with a diameter smaller than the insertion hole.

[0079] And the grip member (200) contracted in this manner passes through the insertion port and is positioned inside the first fixing groove (112a) and is expanded by the restoring force.

[0080] At this time, the grip member (200) is formed with a curvature in the initial state that is relatively smaller than the inner diameter of the first settling groove (114a) and the second settling groove (114b), and is positioned in a state of expansion and contraction within the settling groove, and is continuously pressed in the direction in which the circumference expands due to the restoring force.

[0081] Accordingly, the expanded state of the grip member (200) is continuously subjected to an external restoring force so as to maintain a state of being pressed in response to the inner diameter of the first fixing groove (112a).

[0082] By configuring the grip member (200) in this way, it can be inserted in a compressed state from the outside of the fitting unit (100) and then expanded in the first mounting groove (112a) or the second mounting groove (114a), so that even if the pipe (P) is later inserted through the insertion port, it can be arranged to stably wrap around the circumference.

[0083] Next, referring to FIG. 7, the sealing member (300) in the pipe connecting device according to one embodiment of the present invention will be examined.

[0084] The sealing member (300) according to the present invention is provided in the first mounting groove (112a) or the second mounting groove (114a) and is a component that maintains airtightness between the fitting unit (100) and the pipe (P).

[0085] Specifically, the sealing member (300) is configured to surround and seal the outer surface of the pipe (P) by being composed of at least one of the above-described sealing members. In this embodiment, the sealing member (300) is positioned within the second fixing groove (114a) and is spaced apart from the grip member (200).

[0086] The reason why the sealing member (300) is provided on the inner side of the grip member (200) described above is to prevent the fluid flowing between the pipes (P) from leaking toward the grip member (200). That is, the sealing member (300) is provided close to the center of the fitting unit (100) to prevent fluid leakage in advance.

[0087] As shown in Fig. 7, the sealing member (300) is formed to have elasticity and is seated in the second seating groove (114a), and is formed in a ring shape overall.

[0088] Specifically, the sealing member (300) may include a main sealing area (310) (310) of a preset shape based on a longitudinal cross-section, and an auxiliary sealing area (320) (320) protruding outward from the main sealing area (310) (310).

[0089] In the present embodiment, the main sealing area (310)(310) is formed to have a circular shape, and the auxiliary sealing area (320)(320) has a shape in which a pair of them protrudes on both sides of the main sealing area (310)(310). This cross-sectional shape allows the sealing member (300) to adhere more strongly to the pipe (P), thereby improving the sealing force.

[0090] In general, pipes (P) can develop scratches during manufacturing, transportation, and construction. The tolerance for scratches is stated to be 22% of the tube thickness. However, when applied to actual products, scratches of 22% thickness can make it difficult to maintain the desired sealing force, as the pipe is sensitive to sealing force and durability.

[0091] In particular, refrigerants (such as helium) used in air conditioning systems, among the fluids passing through the pipe (P), are sensitive to scratches, which increases the possibility of leakage.

[0092] Accordingly, when using the actual product, a stricter standard is applied rather than allowing scratches of 22% thickness.

[0093] However, as the sealing member (300) of the present invention is provided with an auxiliary sealing area (320) (320) together with a main sealing area (310) (310), the compression force with the pipe (P) increases, thereby maintaining the index force.

[0094] That is, the present invention has the effect of maintaining the index force even if there is a scratch on the pipe (P).

[0095] In this way, the pipe connecting device according to the present invention includes the above-described fitting unit (100), the grip member (200), and the sealing member (300), and after the grip member (200) and the sealing member (300) are respectively seated in the first seating groove (112a) and the second seating groove (114a) of the fitting unit (100), the pipe (P) is inserted through insertion holes on both sides.

[0096] And, the fitting unit (100) is pressurized by a separate pressurizing unit (400) to compress and deform the outer surface of the pipe (P) together with the grip member (200) and maintain a combined state without being detached.

[0097] At this time, the grip member (200) of the present invention is configured to be stably reduced and expanded in the circumferential direction by being made of an elastic material so that a portion of the circumference is not connected, so that it can be easily inserted into the fitting unit (100) and the pipe (P) can be stably pressurized.

[0098] In addition, the grip member (200) is produced with a simple structure by folding a plate-shaped material to form a mounting portion (210) and a grip portion (220) in a double-layer manner, and at the same time has elastic restoring force and can pressurize the pipe (P).

[0099] In addition, the pipe connecting device according to the present invention has a simple configuration because it does not have a separate fixing device or the like, and the installation method is very easy, so it has the advantage of being able to drastically reduce the construction time and cost.

[0100] Next, the configuration of the pressurizing unit (400) according to the present invention will be described with reference to FIGS. 8 and 9.

[0101] FIG. 8 is a drawing showing the appearance of a pressurizing unit (400) in a pipe connecting device according to one embodiment of the present invention, and FIG. 9 is a drawing showing the appearance of a pressurizing unit (400) mounted on a fitting unit (100) in a pipe connecting device according to one embodiment of the present invention.

[0102] As shown in FIGS. 8 and 9, the pipe connecting device according to one embodiment of the present invention further includes a pressurizing unit (400).

[0103] The above pressurizing unit (400) is a component that is mounted to surround the outer surface of the fitting unit (100) and, by pressurizing it, deforms the grip member (200) provided on the inside of the fitting unit (100) and applies pressure to the pipe (P) to strongly restrain it.

[0104] In this embodiment, the pressurizing unit (400) has a mounting space (S2) formed therein into which a grip member (200) is inserted, and includes a pressurizing body (410) that wraps around and pressurizes the outer surface of the grip member (200).

[0105] And, in the above pressurized body (410), a first recessed groove (420) in which the first member mounting portion (112) of the fitting unit (100) is mounted, and a second recessed groove (440) in which the second member mounting portion (114) is mounted are formed along the inner circumference.

[0106] Accordingly, the pressurizing body (410) is mounted on the fitting unit (100) as shown in Fig. 9, and applies a pressurizing force by contacting the inner extension portion (111), the second member mounting portion (114), the groove separation portion (113), the first member mounting portion (112), and the outer extension portion (116), respectively. A pressurizing unit (400) of this type can increase the fastening force so that the first pipe (P) or the second pipe (P) does not come off.

[0107] In particular, in this embodiment, the pressurizing unit (400) is formed to pressurize only a portion of the inner extension portion (111), thereby preventing the end of the pipe (P) from being deformed.

[0108] In addition, the inner circumferential surfaces (430) of the first recessed groove (420) and the second recessed groove (440) may have various cross-sectional shapes. In the present embodiment, the cross-sections of the inner circumferential surfaces (430) of the first recessed groove (420) and the second recessed groove (440) have a flat shape.

[0109] The pressurizing unit (400) configured in this manner is divided into a plurality of members, and the pressurizing body (410) wraps around the circumference of the fitting unit (100) and pressurizes simultaneously, thereby simultaneously pressurizing the inner extension portion (111), the second member mounting portion (114), the groove separation portion (113), the first member mounting portion (112), and the outer extension portion (116), as shown in FIG. 9, thereby stably allowing the grip member (200) to pressurize the pipe (P).

[0110] Next, with reference to FIGS. 10 and 11, a structure for preventing the pipe (P) mounted on the fitting unit (100) of the present invention from being detached to the outside will be examined.

[0111] Looking at the drawing shown, the grip member (200) is seated inside the first recessed groove, and the pipe (P) is inserted into the insertion space (S1) in a state where the uppermost and lowermost ends of the grip member (200) are arranged with a length of L1.

[0112] At this time, the grip member (200) has a width smaller than the width in the longitudinal direction of the first fixing groove (112a) and the second fixing groove (114a), and has a space in which a certain angle of twist can occur when an external force is applied in the longitudinal direction of the fitting unit (100) in a fixed state.

[0113] And, when the pipe (P) is pulled in the direction of separation from the fitting unit (100), it is deformed along the tensile direction.

[0114] Here, the fitting unit (100) moves along the tensile direction in the part that comes into contact with the pipe (P) when deformed, and at the same time, a part of it digs into the outer surface of the pipe (P), thereby preventing the fitting unit (100) from being detached.

[0115] As specifically illustrated, when the fitting unit (100) is twisted along the tensile direction, the length in the vertical direction becomes L2, which is relatively longer than the basic state L1, due to the bending and deformation. Accordingly, the grip portion (220) digs into the inner surface of the pipe (P) as the length in the vertical direction increases, thereby preventing the pipe (P) from being detached.

[0116] This is shown in the drawing of Fig. 10, which shows the deformed shape of the grip member (200) through an actual experiment, and it can be seen that the grip member (200) is deformed and the detachment of the pipe (P) is suppressed.

[0117] In the case of (a) of Fig. 10, it simply shows a state in which the grip member (200) is not deformed, and in the case of (b) of Fig. 10, it shows a state in which the grip member (200) is deformed in the separation direction of the pipe (P) and the height in the vertical direction increases.

[0118] Next, referring to FIGS. 12 and 13, we will look at the modified form of the grip member (200) according to the present invention.

[0119] Looking at the drawing shown, the basic shape of the grip member (200) is similar to that described above, but the shape of the protruding grip portion (220) is different.

[0120] Specifically, the end of the grip portion (220) is formed to have a tapered shape with the inner side longer than the outer side in the direction of the pipe (P) into which it is inserted. At this time, the mounting portion (210) is formed in the same shape and is reduced in a pressurized shape around the circumference to be mounted inside the first mounting groove (112a).

[0121] Here, as shown, the end of the grip portion (220) is configured to contact the outer surface of the pipe (P), so as to minimize interference when the pipe (P) is inserted into the fitting unit (100), and conversely, when it is detached, the protruding portion presses the outer surface of the pipe (P) to prevent detachment.

[0122] That is, the grip portion (220) is formed in a form in which the protruding length increases as it moves toward the inside of the fitting unit (100), thereby allowing it to maintain a stable combined state with the pipe (P).

[0123]

[0124] As described above, preferred embodiments of the present invention have been described. It will be apparent to those skilled in the art that the present invention can be embodied in other specific forms, in addition to the embodiments described above, without departing from the spirit or scope thereof. Therefore, the above-described embodiments should be considered illustrative rather than restrictive, and accordingly, the present invention is not limited to the above description, but may be modified within the scope of the appended claims and their equivalents.

[0125] (Explanation of symbols)

[0126] 100: Fitting unit

[0127] 111: Inner extension

[0128] 112: First auxiliary equipment

[0129] 113: Home separation

[0130] 114: Second attachment part

[0131] 116: Outer extension

[0132] 200: Grip member

[0133] 210: Anchoring

[0134] 220: Grip

[0135] 300: Sealing member

[0136] 310: Main ceiling area

[0137] 320: Auxiliary sealing area

[0138] 400: Pressurized unit

[0139] 410: Pressurized body

[0140] 420: First sinkhole

[0141] 430: If you give it to me

[0142] 440: Second sinkhole

Claims

1. A fitting unit having an insertion hole formed on both sides with a predetermined length into which a pipe is inserted, an insertion space formed inside, and a first fixing groove formed on both sides adjacent to the insertion hole and a second fixing groove formed further inward than the first fixing groove, each formed along the inner circumference of the fitting unit; A grip member provided in either the first fixing groove or the second fixing groove to press and fix the pipe; and A sealing member is provided in one of the first and second fixing grooves, where the grip member is not located, to maintain airtightness between the fitting unit and the pipe; The above grip member is an integral member formed of a plate having a predetermined width along the insertion direction of the pipe and having a predetermined curvature to form an arc shape, and a pipe connecting device in which a mounting portion that is mounted in the first mounting groove or the second mounting groove and a grip portion that extends inward from the mounting portion are repeatedly provided.

2. In paragraph 1, The above grip member is, A pipe connecting device formed so that the diameter is reduced by compression applied to the outer surface of the fitting unit to compress the pipe, by being seated in the first seating groove and having a non-closed shape with a portion of the circumference open.

3. In paragraph 2, The above grip member is, A pipe connecting device in which the fitting unit is compressed while the pipe is inserted into the insertion port and is moved to the first or second mounting groove and expanded by being pressurized in a form in which the circumference is reduced.

4. In paragraph 3, The above grip member is, A pipe connecting device configured to have elastic restoring force in the outer radial direction so as not to exceed the elastic limit due to deformation.

5. In paragraph 3, The above grip member is, A pipe connecting device in which the curvature of the initial state is formed relatively smaller than the inner diameters of the first and second anchoring grooves.

6. In paragraph 3, The above grip member is, A pipe connecting device configured to be contracted into a circular shape with a diameter smaller than the above insertion port.

7. In paragraph 1, The above grip member is, A pipe connecting device having a width smaller than the longitudinal widths of the first and second fixing grooves, and characterized in that the pipe is deformed along the tensile direction when pulled in the direction in which the pipe is detached from the fitting unit.

8. In paragraph 1, A pipe connecting device characterized in that the end of the grip portion is formed in a tapered shape with the inner side longer than the outer side in the direction of the pipe into which it is inserted.

9. In paragraph 1, The above grip part, A pipe connecting device in which a portion protruding toward the pipe is formed in a polygonal or semicircular shape.

10. In paragraph 1, The above sealing member is, A pipe connecting device formed in a ring shape and seated in the second seating groove, formed to have elasticity.

11. In paragraph 10, A pipe connecting device in which the longitudinal section of the above sealing member includes a main sealing area of ​​a preset shape.

12. In paragraph 11, A pipe connecting device in which the longitudinal section of the above sealing member further includes an auxiliary sealing region protruding outward from the main sealing region.

13. In paragraph 1, The above fitting unit is, A first member mounting portion having a first mounting groove formed on the inner surface thereof; A second member mounting portion having a second mounting groove formed on the inner surface thereof; A grooved gap formed between the first member mounting portion and the second member mounting portion; and An inner extension formed to extend inwardly from the second attachment portion; A pipe connecting device including:

14. In paragraph 13, The above fitting unit is, A pipe connecting device further including an outer extension portion extending outwardly from the first auxiliary mounting portion.

15. In paragraph 13, A pipe connecting device in which the first member mounting portion and the second member mounting portion are formed to have an outer diameter larger than that of the groove separation portion and the inner extension portion.

16. In paragraph 1, A pipe connecting device further comprising a pressurizing unit mounted to surround the outer surface of the above fitting unit and apply pressure.

17. In paragraph 16, The above pressurizing unit, A pipe connecting device including a mounting space formed inside the fitting unit, and a pressurizing body that wraps around and pressurizes the outer surface of the fitting unit.

18. In paragraph 17, The first member mounting portion and the second member mounting portion are formed to have an outer diameter larger than the groove separation portion and the inner extension portion. A pipe connecting device having a first recessed groove in which the first member mounting part is mounted and a second recessed groove in which the second member mounting part is mounted formed along the inner circumference of the pressurized body.

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