KR101059014B1 - Pipe fitting for absorbing expansion and earthquake-proof - Google Patents

Abstract

PURPOSE: An expandable and earthquake-proof pipe joint is provided to prevent the destroying of pipe joint by preventing the increasing of partial flow pressure and vortex which is caused by the inflow of fluid. CONSTITUTION: An expandable and earthquake-proof pipe joint comprises a body(110), a packing(120), a flange(130), a pressing ring(121), a combining member, and a buffering member. One end of a pipe(101) is inserted into the body. A level difference is formed at an end of the body in which one end of the pipe is inserted. An inner diameter of the body is expanded through the level difference. The packing seals the inner surface of the body and the outer surface of the pipe. The flange pressurizes the packing to a vertical plane of the level different part in the longitudinal direction of a pipe. The buffering member absorbs the expansion and contraction of the pipe.

Description

Pipe fittings for absorbing expansion and earthquake-proof}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to pipe fittings, and relates to expansion and earthquake fittings made to absorb expansion and contraction caused by internal and external heat and environment while interconnecting a plurality of pipes and sealing them from the outside.

In general, a pipe (pipe) is widely used as a means for continuously transporting a fluid such as a liquid or gas over a long distance.

These tubes are widely used in various materials such as plastics or metals in accordance with the type and composition of the fluid and the use environment.

These pipes are interconnected with a plurality of pipes from the supply source to the consumer, and the joints of these pipes are generally provided with fittings.

Here, a tube disposed in a region in which a liquid or gas with a large temperature change flows or a large temperature change is expanded or contracted according to the temperature of the flow material or the ambient temperature.

In addition, the length of the tubes is changed while moving finely by the movement of the ground or the wall, such as the ground or the wall is disposed, or by an external force such as wind.

In order to absorb the elastic deformation generated in the tube, a corrugated tube of a corrugated wave is connected to the connection portion of the tube, or a tube fitting manufactured to slide the tube when the tube is stretched is used.

Here, in the case of a pipe fitting 10 using a conventional corrugated pipe, as shown in FIG. 1, the both ends of the corrugated pipe 11 and the corrugated pipe 11 that expand and contract according to the temperature change of the fluid flowing therein are respectively welded. In order to protect the pipe 12 and the corrugated pipe 11 joined by the protection pipe 13 and the sliding rail 13a respectively formed at both ends of the protection pipe 13 installed so that the corrugated pipe 11 is built in, the sliding rail ( 13a) while the other end is bolted and the other end is bent to include a guide ring 14 in contact with the tube (12).

Therefore, when the tube 12 is stretched, the corrugated tube 11 is contracted while the guide ring 14 slides along the sliding rail 13a together with the tube 12, thereby absorbing the stretch of the tube 12.

However, since the corrugated pipe 11 and the pipe 12 are normally joined by welding, the welding operation of these corrugated pipe 11 and the pipe 12 was difficult.

In addition, a member such as a flat washer (not shown) was used to facilitate the welding operation, but this method also required a lot of welding time.

On the other hand, in the case of the pipe fitting 20 using the sliding of the conventional expansion and contraction tube, as shown in Figure 2, the step 21a is formed, the tube 21 is reduced in the outer diameter of one end, the tube 21 The ball-shaped tube 22 mounted to one end of the), and the housing 23 mounted while wrapping the ball-shaped tube 22 was included.

At this time, in order to limit the sliding range of the tube 21, an annular stopper 21b is fitted into the groove at the end of the tube 21, and thus the sliding range of the tube 21 is formed at one end of the step 21a. And the gap between the stopper 21b.

Here, the outer diameter and the inner diameter are reduced at one end of the tube 21 by the step 21a formed for sliding of the tube 21.

In addition, the length of one end portion of the tube 21 whose outer diameter and inner diameter are reduced has a predetermined length corresponding to the sliding distance of the predicted tube 21, that is, the stretched range of the predicted tube 21.

Therefore, when the tube 21 expands and contracts, the expansion and contraction of the tube 21 is absorbed by sliding along the ball-shaped tube 22.

However, as the outer diameter and the inner diameter are reduced, the flow pressure of the fluid flowing inside the tube 21 at one end of the tube 21 having a predetermined length is increased as the inner diameter is reduced, as well as the flow of the fluid interferes. This hindered the smooth flow.

In addition, when the stopper 21b provided to limit the sliding range of the tube 21 is destroyed by excessive sliding of the tube 21, the ball-shaped tube 22 and the housing 23 are disengaged from the tube 21. It was a case where the original function was not performed.

In addition, since the fluid is introduced into the space formed between the stopper 21b and the ball-shaped tube 22, the fluid may not be smoothly flowed due to hydraulic pressure and vortex phenomena of the fluid generated when the fluid flows in and out.

In addition, the fitting 20 has a function of seismic resistance (耐震), but the manufacturing cost was expensive, there was a limitation in the installation, there was a problem that the manufacturing structure is complicated and there are many difficulties in manufacturing the fitting 20.

The present invention has been made in order to solve the above problems, it is an object of the present invention to provide a expansion and earthquake-proof pipe fitting having a seismic function in addition to the function of absorbing only the expansion and contraction of the pipe by a simple corrugated pipe installation.

Flexible and earthquake resistant pipes with no change in outer or inner diameter of the pipe for smooth flow of fluids, and integrally formed buffer protrusions at one end of the tube to prevent detachment due to destruction of the buffer protrusion even if the tube slides excessively. There is another purpose in providing the fittings.

In addition, it is another object to provide a expansion and earthquake-proof pipe fitting having an excellent function for earthquake-resistant rotation of the pipe coupled to the tube about the longitudinal axis.

In order to achieve the above object, the expansion and earthquake resistance fittings according to the present invention, in the pipe fitting is mounted on the connection portion of the pipe so that a plurality of pipes are interconnected, one end of each pipe is inserted, A body having a step with an inner diameter extended at each end in the insertion direction; An annular packing disposed at a step to seal an inner surface of the body and an outer surface of the tube; A flange coupled to the body while pressing the packing to the vertical plane of the step with respect to the longitudinal direction of the pipe; Coupling means for coupling the flange and the body; An annular pressing ring interposed between one end of the flange for pressing the packing and the packing; And buffer means for absorbing the change in expansion and contraction of the tube.

Here, the shock absorbing means comprises a plurality of shock absorbing protrusions formed to project at regular intervals on the outer circumferential surface of the same plane at the end of the tube to be inserted into the body, and the shock absorbing protrusions integrally protruding into the pipe with respect to the longitudinal direction of the pipe Located in the space formed in the height (H) of the support jaw while being in the horizontal plane range of the step, it is characterized in that sliding in the length (L) of the support jaw from the pressing ring according to the expansion and contraction of the tube.

In addition, the coupling means includes a plurality of coupling pieces protruding at predetermined intervals on the end surface of each end of the body into which the tube is inserted; A coupling groove formed in the coupling piece, the coupling groove having a shape in which a part of one side of the center side of the tube is engraved, the connection part being engraved with the engraving part, and a part of the other surface being engraved; And a plurality of coupling protrusions protruding at regular intervals from the one end of the body opposite the flange to the outer circumferential surface on the same plane, wherein the coupling protrusions are positioned between the coupling grooves, and then the coupling protrusions are axially rotated together with the flanges. Characterized in that made to be coupled to the coupling groove.

In another embodiment, the coupling means includes a plurality of coupling pieces protruding at regular intervals on the outer circumferential surface of the same plane at one end opposite the body of the flange; A coupling groove formed in the coupling piece, and a portion of one side of the central side of the tube is engraved, the coupling groove having a shape in which a portion of the other surface is engraved in contact with the engraved portion; And a plurality of coupling protrusions protruding at regular intervals from each end into which the pipes of the body are inserted at regular intervals on the same plane, and the coupling protrusions are positioned between the coupling grooves, and then the coupling protrusions together with the flanges. Axial rotation is characterized in that made to be coupled to the coupling groove.

In addition, when viewed from the center of the tube in the state in which the tube is granular, the shape of the upper surface which is in contact with the coupling protrusion and the coupling groove to be coupled, characterized in that consisting of a horizontal portion, a downward inclined portion, and a vertical portion sequentially in accordance with the coupling direction It is done.

In another embodiment, when viewed from the center of the tube in the granular state, the shape of the upper surface in contact with the coupling protrusion and the coupling groove to be coupled is composed of a horizontal portion, an upwardly inclined portion, and a vertical portion sequentially according to the coupling direction. It is characterized by.

Here, the coupling piece is characterized in that it further comprises a coupling hole is formed to penetrate through the coupling groove in the longitudinal end surface in the longitudinal direction of the tube, the coupling bolt is mounted to press the coupling projection.

According to the expansion and seismic pipe fittings according to the present invention as described above, the elastic deformation of the pipe is absorbed by the pipe fittings mounted on the connection portion of the pipes, so as to eliminate the additional corrugated pipe production or installation, as well as the seismic absorption function There is an effect added until.

In addition, since the inner diameter of the entire pipe is the same without changing the inner diameter at one end of the pipe connected to the pipe fitting, the flow pressure of the fluid flowing inside the pipe is maintained to be the same, thereby smoothly flowing the fluid.

In addition, since the buffer protrusion is integrally formed at one end of the tube, there is an effect of preventing detachment due to the destruction of the buffer protrusion, which may occur when a separate buffer protrusion is installed by sliding the tube due to excessive stretching.

In addition, the space where the fluid can flow between the pipe fittings and the pipes at the joint portion of the pipes is excluded, so that the vortex and partial flow pressure increase generated when the space flows in and out of the fluid are eliminated, so that the Destruction is effective.

In addition, if the joints of the pipes are connected with pipe fittings such as "L" and "T" shapes, the earthquake-resistant rotation of the pipes in this joint area at the time of the earthquake will result in seismic effects. Can be. For example, horizontally arranged tubes rotate in a rotational manner about an axis of a horizontal centerline, and vertically arranged tubes pivot forward or backward. Therefore, it is possible to cope with not only the expansion and contraction absorption of the tube by heat or earthquake, but also the ground distortion due to the earthquake, and a seismic function is newly acquired.

In addition, the structure of the pipe fittings is simple and easy to manufacture, the manufacturing cost is low, there is an effect that the burden of the cost is reduced even for a large number of installations.

1 is a side cross-sectional view schematically showing one embodiment of a conventional fitting;
2 is a side cross-sectional view schematically showing another embodiment of a conventional fitting;
Figure 3 is a perspective view schematically showing the expansion and earthquake fittings according to the present invention,
4 is an exploded perspective view of the fitting shown in FIG. 3;
5A and 5B are side cross-sectional views and use state diagrams of the fittings shown in FIG. 3,
6A to 6C are side views schematically showing embodiments of a state in which a coupling protrusion of a flange and a coupling groove of a coupling piece shown in FIG. 3 are coupled;
7 is a perspective view showing another embodiment of the expansion and earthquake resistance fittings shown in FIG.
8A and 8B are exploded perspective and side cross-sectional views of the fitting shown in FIG. 7.

Hereinafter will be described in detail with reference to the accompanying drawings for expansion and earthquake fittings according to the present invention.

3 is a perspective view schematically showing the expansion and earthquake fittings according to the invention, Figure 4 is an exploded perspective view of the fitting shown in Figure 3, Figures 5a and 5b of the fitting shown in Figure 3 6 is a side cross-sectional view and a state diagram of use, and FIGS. 6A to 6C are side views schematically showing embodiments of a state in which a coupling protrusion of a flange and a coupling groove of a coupling piece are illustrated in FIG. 3.

First, as shown in FIGS. 3 and 4, the expansion and earthquake resistance pipe fitting 100 according to the present invention, the one end portion of the connection portion side of the pipe 101 to be interconnected, respectively, the pipe 101 A body 110 in which a step 111 is formed so that an inner diameter thereof is respectively extended at both ends of one end of which is inserted; An annular packing 120 disposed on the step 111 to seal the inner surface of the body 110 and the outer surface of the tube 101; A flange 130 coupled to the body 110 while pressing the packing 120 to the step 111, and having a support jaw 131 protruding from one end portion of the inner circumferential surface of the opposite side of the body 110; Coupling means for coupling the flange 130 and the body 110; It comprises a; buffer means for absorbing the expansion and contraction of the tube (101).

Here, the coupling means is a plurality of coupling pieces 140 protruding at regular intervals on the end surface of both sides of the body 110, as shown in Figures 4 to 5b, the coupling piece 140 of the pipe 101 A portion of one side of the center side is engraved and connected to the engraved portion so that a portion of the other surface is engraved at a predetermined distance from the outer circumferential surface on the same plane at one end of the body 110 of the flange 130. It comprises a plurality of coupling protrusions 132 protruding into.

Coupling piece 140 is formed integrally with the body 110, the engaging projection 132 is formed integrally with the flange 130. If necessary, a separate manufacturing method, including a welding method and the like, may be used and fixed.

In addition, when viewed from the center of the granular tube 101, the shape of one side of the coupling piece 140, the coupling groove 141 is formed is the same as in Figures 6a to 6c.

Here, an annular pressure ring 121 is interposed between the packing 120 and the end of the flange 130.

A coupling hole 142 is formed at the outermost surface of the coupling piece 140 in the longitudinal direction of the pipe 101, and the coupling bolt 143 is mounted through the coupling hole 142.

Herein, the coupling bolt 143 may be bolted to the coupling protrusion 132 in a state where the coupling bolt 143 passes through the coupling hole 142.

6A to 6C are coupled to the coupling protrusion 132 when viewed from the center of the tube 101 in a state where the tube 101, the body 110, and the flange 130 are granular for easy description. The state in which the groove 141 is coupled is shown.

As shown in Figure 6a, the shape of the upper surface (upside) of the coupling groove 141 and the coupling protrusion 132 that are in contact with each other is a horizontal portion sequentially in accordance with the coupling direction of the coupling groove 141 and the coupling protrusion 132 ( 132a and 141a, downwardly inclined portions 132b and 141b, and vertical portions 132c and 141c.

At this time, in order to increase the coupling force of the coupling groove 141 and the coupling protrusion 132, as shown in Figure 6b, the projection 132d in the horizontal portion 132a of the coupling protrusion 132, the horizontal of the coupling groove 141 Grooves 141d may be formed in the portion 141a to be fastened to each other.

In addition, as another example, the shape of the upper surface of the coupling groove 141 and the coupling protrusion 132 that are in contact with each other as shown in Figure 6c is sequentially in accordance with the coupling direction of the coupling groove 141 and the coupling protrusion 132. The horizontal portions 132a and 141a, the upward inclined portions 132b and 141b, and the vertical portions 132c and 141c may be formed. The coupling of such a shape is required to be forced fitting but to make it difficult to disengage in the opposite direction.

Of course, the coupling of the coupling protrusion 132 and the coupling groove 141 is assisted by the coupling bolt 143, so that unintentional release of the coupling does not occur.

On the other hand, as shown in Figures 5a and 5b, the buffer means comprises a plurality of buffer protrusions 101a protruding at regular intervals on the outer circumferential surface of the same plane at both ends of the tube 101, respectively.

At this time, the buffer protrusion (101a) is located in the space formed by the height (H) of the support jaw 131 of the flange 130 in the range of the horizontal surface (111b) of the step 111 in the longitudinal direction of the tube (101).

Here, the buffer protrusion (101a) is a shape that protrudes by deforming the tube 101, is formed in a plurality at regular intervals on the same plane. In this case, the buffer protrusion 101a may be formed in a continuous annular shape.

5B shows a state in which the buffer protrusion 101a is slid from the initial position, and the sliding of the buffer protrusion 101a is caused by the change of the length of the tube 101 according to the expansion and contraction of the tube 101. ) Is caused to move. Alternatively, the buffer protrusion 101a is moved due to the movement of the pipe 101 due to the fluid pressure or the change of the ground.

Hereinafter, another embodiment of the expansion and earthquake resistance fittings according to the present invention will be described in detail with reference to the accompanying drawings.

7 is a perspective view showing another embodiment of the expansion and earthquake resistance fittings shown in Figure 3, Figures 8a and 8b is an exploded perspective and side cross-sectional view of the fitting shown in FIG.

Another embodiment of the telescopic and seismic fitting 100 as shown in FIGS. 7 to 8b is intensively focused on the components having differences compared to the telescopic and seismic fitting 100 shown in FIG. 3. Let's explain.

Here, the components denoted by the same reference numerals as in FIGS. 3 to 6B are the same components having the same functions.

In the embodiment of FIG. 3, if the coupling protrusion 132 is formed on the flange 130 and the coupling piece 140 is formed on the body 110, in another embodiment of FIG. 7, the coupling protrusion 132 is the body 110. ), And the coupling piece 140 is formed on the flange 130, there is a difference.

At this time, the engaging projection 132 is formed on the outer circumferential surface on the same plane at both ends of the body 110 with respect to the longitudinal direction of the pipe 101, the coupling piece 140 one end of the opposite side of the body 110 of the flange 130 Is formed on the outer circumferential surface on the same plane.

Of course, the shape, coupling structure, function, etc. of the coupling protrusion 132 and the coupling groove 141 is the same as in the embodiment of FIG.

Hereinafter, the coupling and action of the expansion and earthquake resistance fittings of the present invention according to the embodiment of FIG.

First, when one end of the tube 101 is inserted into the body 110, the packing 120 and the pressure ring 121 are sequentially disposed on the step 111 of the body 110, formed at the end of the body 110 The flange 130 is coupled to the coupling piece 140.

At this time, the buffer projection (101a) formed at one end of the tube 101 is located between the pressing ring 121 and the support jaw 131 of the flange 130, step 111 in the longitudinal direction of the tube 101 It is located in the space formed by the height (H) of the support jaw 131 while being in the horizontal plane (111b) of the range.

Next, the coupling bolt 143 is mounted to the coupling hole 142 of the coupling piece 140.

Thus, the fitting of the pipe fitting 100 and the pipe 101 is made.

Here, the coupling of the body 110 and the flange 130 by the coupling means is the flange 130 is located in the body 110 so that the coupling projection 132 is located between the coupling grooves 141, then the flange ( When the shaft 130 is rotated in one direction, the coupling protrusion 132 is coupled to the coupling groove 141.

At this time, when the flange 130 is coupled to the body 110, one end of the body 110 side of the flange 130 pressurizes the packing 120 disposed in the step 111, by the packing 120 The inner surface of the body 110 and the outer surface of the tube 101 are tightly sealed.

The pressing force transmitted from the end of the flange 130 by the pressure ring 121 is evenly transmitted to one surface of the packing 120 in contact with the pressure ring 121 to increase the sealing force.

In addition, breakage of the packing 120, which may occur when the pressing force transmitted from the end of the packing 120 is concentrated on a part of the packing 120, may be prevented.

By pressing the coupling protrusion 132 in a state where the coupling bolt 143 is coupled to the coupling groove 141, the coupling force of the coupling protrusion 132 and the coupling groove 141 is increased.

Accordingly, the coupling bolt 143 mounted on the coupling hole 142 pressurizes the coupling protrusion 132 to assist in maintaining the coupling between the coupling protrusion 132 and the coupling groove 141, and thus supports one end of the flange 130. The pressurization state of the pressure ring 121 by the negative is also assisted to be continuously maintained.

Since the buffer protrusion 101a is formed integrally by deforming the pipe 101, the buffer protrusion 101a may be deformed by interference with the support jaw 131 of the pressure ring 121 or the flange 130 while the buffer protrusion 101a slides. However, it is prevented from being destroyed and detached.

The buffer protrusion 101a absorbs the expansion and contraction of the tube 101 while sliding in the length L from the pressure ring 121 to the support jaw 131 of the flange 130 according to the expansion and contraction of the tube 101. .

On the other hand, in the other embodiment of Figure 7, only the position where the coupling piece 140 and the coupling protrusion 132 is formed, and the coupling and action is the same as the embodiment of Figure 3, the description thereof will be omitted.

Here, the expansion and contraction of the tube 101 is generated by the heat of the fluid flowing through the inside of the tube 101 or the external heat, this expansion and contraction is made by the expansion and earthquake resistance pipe fitting 100 according to the present invention The stretching of 101 is absorbed.

In addition, even if the pipe 101 is separated from the initial position by the ground environment changes, including the flow pressure of the fluid flowing in the pipe 101, subsidence in the ground, earthquake, etc., the expansion and earthquake resistant pipe according to the present invention The expansion and contraction of the pipe 101 is absorbed by the fitting 100.

Since the mutual coupling of the pipe 101, the body 110, and the flange 130 in the pipe fitting 100 is completely prevented from sticking, the pipe 101 rotates in a rotational manner around the longitudinal center line. In addition, the coupling between these members 101, 110, 130 is maintained continuously.

Accordingly, when the “T” shaped pipe fitting 100 is disposed at the connection portion of the pipes 101 as shown in FIG. 1, when the earthquake occurs, the pipe 101 on the horizontal line rotates about its longitudinal center line in the rotational direction. And, the pipe 101 on the vertical line pivots forward or backward.

As a result, the seismic function is performed without destroying the pipe 101 and the pipe fitting 100.

Here, the "L" shaped fitting 100 is rotated similarly to the "T" shaped seismic function is performed, also in the case of a straight fitting 100, "L" shaped or "T" shaped pipe It is connected to the fitting 100 to assist in the function of earthquake.

In addition, the seismic function is further improved when a plurality of pipe fittings 100 are installed in close proximity.

On the other hand, by describing the embodiments in which two pipes are connected to explain the expansion and earthquake fittings according to the present invention, the body was described as being a hollow cylindrical shape.

However, when three tubes are connected, a "T" shaped body is used, when four tubes are connected, a "+" shaped body is used, and even when more tubes are connected, a correspondingly modified body is used. At each end of the respective components described above are mounted and used.

Therefore, not only two pipes may be used to connect but also three or more pipes of course.

As described above, those skilled in the art will understand that the present invention can be implemented in other specific forms without changing the technical spirit or essential features. It is therefore to be understood that the above-described embodiments are to be considered in all respects as illustrative and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included within the scope of the present invention.

100 ... fittings 110 ... body,
120 ... Pressure ring 130 ... Flange,
131 ... support jaw 132 ...
140 ... engagement piece 141 ... engagement groove,
142.Combination ball.

Claims (7)

In the pipe fitting mounted on the connection of the pipes 101 to interconnect the plurality of pipes 101,
One end of each of the tubes (101) is inserted, the body 110 is formed with a step (111) so that the inner diameter is extended to each end is inserted into one end of the tube (101);
A packing 120 disposed at the step 111 to seal an inner surface of the body 110 and an outer surface of the tube 101;
A flange 130 coupled to the body 110 while pressing the packing 120 to the vertical surface 111a of the step 111 in the longitudinal direction of the pipe 101;
Coupling means for coupling the flange 130 and the body 110;
A pressing ring 121 interposed between one end of the flange 130 for pressing the packing 120 and the packing 120; And
Buffer means for absorbing the expansion and contraction of the tube (101) is included,
The shock absorbing means includes a plurality of shock absorbing protrusions 101a protruding at regular intervals from one end of the tube 101 inserted into the body 110 at regular intervals, respectively, and formed integrally with the shock absorbing protrusion. 101a is located in the space formed in the height (H) of the support jaw 131 in the horizontal plane (111b) range of the step 111 in the longitudinal direction of the tube 101, the It is made to slide in the length (L) from the pressing ring 121 to the support jaw 131 according to the expansion and contraction,
The coupling means includes a plurality of coupling pieces 140 protruding at predetermined intervals in the end surface of each end of the body 110 into which the pipe 101 is inserted; A coupling groove 141 formed on the coupling piece 140 and having a portion of one side of the center side of the tube 101 engraved therein, and being connected to the engraved portion so that a portion of the other side is engraved; And a plurality of coupling protrusions 132 protruding at regular intervals from one end of the flange 130 opposite to the body 110 at regular intervals on the outer circumferential surface of the same plane, and between the coupling grooves 141. After the coupling protrusion 132 is positioned, the coupling protrusion 132 is axially rotated together with the flange 130 to be coupled to the coupling groove 141,
When viewed from the center of the tube 101 in the state in which the tube 101 is granular, the shape of the upper surface of the coupling protrusion 132 and the coupling groove 141 to be coupled to each other, in sequence according to the coupling direction Horizontal portions 132a and 141a, downward inclination portions 132b and 141b, and vertical portions 132c and 141c,
The coupling piece 140 is formed to penetrate through the coupling groove 141 in the longitudinal section in the longitudinal direction of the tube 101, the coupling bolt 143 is coupled to the coupling hole 132 to press the coupling protrusion 132 Expansion and earthquake-proof fittings, characterized in that further comprises (142). delete delete In the pipe fitting mounted on the connection of the pipes 101 to interconnect the plurality of pipes 101,
One end of each of the tubes (101) is inserted, the body 110 is formed with a step (111) so that the inner diameter is extended to each end is inserted into one end of the tube (101);
A packing 120 disposed at the step 111 to seal an inner surface of the body 110 and an outer surface of the tube 101;
A flange 130 coupled to the body 110 while pressing the packing 120 to the vertical surface 111a of the step 111 in the longitudinal direction of the pipe 101;
Coupling means for coupling the flange 130 and the body 110;
A pressing ring 121 interposed between one end of the flange 130 for pressing the packing 120 and the packing 120; And
Buffer means for absorbing the expansion and contraction of the tube (101) is included,
The shock absorbing means includes a plurality of shock absorbing protrusions 101a protruding at regular intervals from one end of the tube 101 inserted into the body 110 at regular intervals, respectively, and formed integrally with the shock absorbing protrusion. 101a is located in the space formed in the height (H) of the support jaw 131 in the horizontal plane (111b) range of the step 111 in the longitudinal direction of the tube 101, the It is made to slide in the length (L) from the pressing ring 121 to the support jaw 131 according to the expansion and contraction,
The coupling means includes a plurality of coupling pieces (140) protruding at regular intervals on the outer circumferential surface on the same plane from one end of the flange (130) opposite the body (110); A coupling groove 141 formed on the coupling piece 140 and having a portion of one side of the center side of the tube 101 engraved therein, and being connected to the engraved portion so that a portion of the other side is engraved; And a plurality of coupling protrusions 132 protruding at predetermined intervals from each end of the body 110 into which the tube 101 is inserted, at regular intervals, respectively, and including the coupling groove 141. After the coupling protrusion 132 is located between them, the coupling groove 141 is axially rotated together with the flange 130 to be coupled to the coupling protrusion 132,
When viewed from the center of the tube 101 in the state in which the tube 101 is granular, the shape of the upper surface of the coupling protrusion 132 and the coupling groove 141 to be coupled to each other, in sequence according to the coupling direction Consisting of horizontal portions 132a and 141a, downwardly inclined portions 132b and 141b, and vertical portions 132c and 141c,
The coupling piece 140 is formed to penetrate through the coupling groove 141 in the longitudinal section in the longitudinal direction of the tube 101, the coupling bolt 143 is coupled to the coupling hole 132 to press the coupling protrusion 132 Expansion and earthquake-proof fittings, characterized in that further comprises (142). delete The method according to claim 1 or 4,
When viewed from the center of the tube 101 in the state in which the tube 101 is granular, the shape of the upper surface of the coupling protrusion 132 and the coupling groove 141 to be coupled to each other, in sequence according to the coupling direction Stretching and seismic fittings, characterized in that consisting of the horizontal portion (132a, 141a), the upward inclined portion (132b, 141b), and the vertical portion (132c, 141c). delete

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