KR20200040734A - Method and structure for connecting water pipe line - Google Patents

Abstract

The present invention relates to a water pipe connection structure which couples packing between a socket unit and a spigot of a water pipe to achieve stubborn sealing of a connection unit, and inserts an O-ring into an upper portion of the outer circumference of a packing insertion unit to tightly attach an end portion of the packing insertion unit to the outer circumference of the water pipe to prevent an oxidized material and foreign substances created on the spigot from entering a water path. The water pipe connection structure couples a socket unit (5) and a spigot (6) of a water pipe, and comprises: a soft packing (17) installed between the socket unit (5) and the spigot (6) of the water pipe; a side of the packing (17) tightly attached to a side (6a) of the spigot (6) of the water pipe (2); a packing insertion unit (18) which is extended to one side of the packing (17), and covers and encloses an end portion of the outer circumference of the spigot (6) to prevent an oxidized material and foreign substances created on an end of the outer surface of the spigot (6) and the side (6a) of the spigot (6) from entering a water pipeline (3, 4); and an O-ring (16) to press the upper surface of the end of the packing insertion unit (18) to prevent a movement of the packing (17), and prevent an oxidized material and foreign substances created on the spigot (6) from entering the water. The width (w) of the packing (17) is 10-200 mm, and the thickness (t) of the packing is 1/5-1/30 of the width (w).

Description

Method and structure for connecting water pipe line}

The KP mechanical bonding method is mainly used as a water pipe piping method, and the present invention relates to a water pipe (water pipe) connection structure applied to this field.

In general, a waterworks pipe refers to a conduit used to supply and distribute purified water from a water purification plant (water purification facility) to a demand source, and it is constructed in such a way that a number of cast iron pipes formed in a constant length are connected (assembled) as long as necessary. This is done.

Since most of these water pipes are constructed to have a length corresponding to a very long distance, they are manufactured in a state designed for a certain length and connected (assembled) according to the construction distance. By this, water tightness of the water supply pipe is achieved and water leakage is also prevented.

The water pipes produced by cast iron pipes in Korea vary from 80mm to 1,200mm, and the KP mechanical jointing method, which is one of the water pipe piping methods, is mainly used. The present invention is applied in this field and its embodiments are described below.

On the other hand, Figure 1 shows a connection state of a conventional water pipe using the KP mechanical joining method, and a water pipe (3) (4) inside the water pipe (1) (2) consisting of a cast iron pipe of a predetermined length and a predetermined inner diameter. ) Is formed, a socket portion 5 is formed at one end of the water pipe 1 and 2, and a shovel 6 is formed at the other end. The insert (6) is coupled to the socket portion (5), and the outer periphery of the insert (6) has a rubber ring (7) and a plurality of bolts (10) engaged in the socket portion (5) in the state fitted 8) are respectively inserted into the through holes (10a) formed around the edge of the rolling wheel (10) and then fastened with a nut (9) to move the rubber ring (7) while moving and pressing the rubber ring (7) to press the water pipe (1). ) (2) watertight is achieved and water leakage is prevented, so the water pipes (1) (2) are connected.

The inner / outer periphery of the water supply pipe (1) (2) is coated with a finishing material to prevent oxidation and increase the endurance. In the case of coating the oil paint thinly so as not to be oxidized with the external finishing material 12, and in the case of the internal finishing material 11, when the inner diameter of the water supply pipe 1 and 2 is 600 mm or less, the main body is coated with an epoxy resin having a thickness of about 2 mm. When finished, and when the inner diameter of the water supply pipes 1 and 2 is 600 mm or more, it is lined with a cement mortar having a thickness of 6 to 8 mm.

That is, the inside of the water supply pipe (1) (2) through which water is flowing is applied with an epoxy resin coating or cement mortar lining method that is harmless to the human body, and the outside of the water supply pipe (1) (2) is coated with ordinary paint to finish the water supply pipe. The oxidation of (1) (2) is prevented.

On the other hand, in the process of supplying and constructing the water supply pipes (1) and (2), they are loaded, transported, and disembarked. Impacts such as external pressure or collision are mainly generated at the ends of the socket portion 5 and the insert 6 of the pipe, and impact is applied to the socket portion 5 and the insert 6 in the process of piping the water supply pipe. As it falls, it is partially damaged (broken), and the damaged part is easily oxidized.

In addition, in the case of the remaining material after piping the water pipe (1) (2), it is stored for a certain period of time and used at the required time. At this time, the socket part (5) and the insert (6) of the water pipe during the transportation process are subject to impact. It is damaged when applied.

At this time, foreign substances 13 and oxides (rust, etc.) such as lumps or powders such as paint and / or epoxy resin or cement mortar that fall off at the point of damage are generated, and in this state, water pipes (1) (2) are piped. When the foreign matter 13 and the oxide material are introduced (mixed) into the high-pressure constant 14 flowing along the water supply line 3 and 4, as well as causing contamination, the household or consumer's water supply (water supply) As it flows out, it is a factor that causes harm to the human body.

In addition, the portion where the coating is peeled off is easily oxidized as shown in FIG. 2. FIG. 2A is an actual photograph taken after removing from a water pipe in order to replace a 1,100 mm diameter water pipe. As a result, the painted paint is peeled off at the end of the shovel exposed inside the water pipe, and oxidation is in progress. , FIG. 2B is a real picture of a very oxidized portion of the water pipe, where paint powder and green water are discharged to the consumer's water tap.

Therefore, while the paint powder and green water are in contact with the constant 14, it is mixed with the constant 14 through the gap 15 formed between the socket part 5 and the insert 6 to continuously pollute the constant 14 There were several problems such as.

Republic of Korea Registered Patent Publication No. 10-0910340 (Invention name: Water supply pipe connection structure, 2009. 08. 04. Patent notice) Republic of Korea Registered Patent Publication No. 10-0738599 (Name of the invention: connection structure of water pipes to prevent leakage of joints, 2007. 07. 12. Patent notice) Republic of Korea Registered Patent Publication No. 10-1295175 (Invention name: Water pipe connection device, 2013. 08. 09. Patent notice)

According to the present invention, by inserting an O-ring on the outer periphery of the packing inserting portion, the end portion of the packing inserting portion is brought into close contact with the outer peripheral edge of the water supply pipe to prevent the inflow (mixing) of oxides and foreign substances generated from the insert into the water supply. The purpose is to provide a pipe connection structure.

Another object of the present invention is to form an inclined protrusion on the upper surface of the end of the packing insert, so that the end of the packing insert is in close contact with the outer periphery of the water supply pipe, and thus oxides and foreign substances generated in the insert are introduced (mixed). It is characterized by providing a water pipe connection structure that prevents it from being prevented.

The water pipe connection structure of the present invention, in the water pipe connection structure for coupling the socket portion and the insert of the water pipe, the soft packing installed between the socket portion and the insert of the water pipe, and is in close contact with the insert side of the water pipe A packing inserting part extending over one side of the packing and covering an outer peripheral end of the inserting to prevent oxidizing substances and foreign matters generated at the side of the packing, the outer surface end of the inserting and the side of the inserting from flowing into the water pipe, and the packing inserting part It includes an O-ring that prevents the flow of the packing by pressing the upper surface of the end and prevents oxides and oxides and foreign matters generated from the shovel from flowing into the water, but the width of the packing is 10 to 200 mm, and the thickness of the packing Is characterized in that 1/5 to 1/30 of the width.

The water pipe connection structure of the present invention, in the water pipe connection structure for coupling the socket portion and the insert of the water pipe, the soft packing installed between the socket portion and the insert of the water pipe, and is in close contact with the insert side of the water pipe The side of the packing, and the outer surface end of the insert and the packing inserting part extending over one side of the packing and covering the outer peripheral end of the insert to prevent oxides and foreign substances from the insert side from flowing into the water pipe, wherein the packing An inclined protrusion having an inclined angle is formed on the upper surface of the end of the inserting portion, and the inclined angle of the inclined protrusion is 3 to 10 ° larger than the inclined angle of the inclined surface formed in the socket portion, thereby packing by pressing the inclined surface. It characterized in that the stronger the pressing force is applied to the end of the insertion portion.

According to the present invention, the soft and tough packing 17 is coupled between the socket part 5 of the connected water pipe 1 and 2 and the insert 6, so that water tightness is achieved, so that the rubber ring 7 is obtained. In addition, double stubborn watertight (水密) is achieved.

Since the packing 17 coupled to the insert 6 is fixed by the packing insert 18 extending to one side of the packing 17, the packing 17 when the socket part 5 and the insert 6 are combined ) Has the effect of preventing flow or displacement.

The packing 17 surrounds the side 6a of the insert 6 and the packing insert 18 covers the outer periphery of the end of the insert 6, so that the outer end of the insert 6 is painted with ordinary paint. And the shovel 6 prevents contamination of the water supply 14 by preventing paint powder rust, etc., generated from the side surface 6a from entering the water supply line 3 and 4.

The present invention uses a band 20 and a turnbuckle 21 temporarily installed on the outer periphery of the water pipe 2 when the socket portion 5 and the insert 6 of the water pipe 1 and 2 are combined. In the state where the socket part 5, the packing 17, and the insert 6 are tightly coupled, it is tightened with a bolt 8 in a temporarily assembled state so that the pressure wheel 10 presses the rubber ring 7 to complete piping. As the pipe 1 and the water pipe 2 are connected in a straight line, there is an effect that accurate piping is achieved.

According to the present invention, the inclined surface 18a of the socket portion 5 is provided with an inclined protrusion 18a formed at the end portion of the packing insertion portion 18 by pressing the end portion of the packing insertion portion 18 with the O-ring 16. By allowing the end of the packing insert 18 to be pressurized, paint powder, rust, and the like generated on the outer surface end of the insert 6 and the side 6a of the insert 6 are water conduits 3, 4 It is a very useful invention having an effect of preventing the contamination of the water supply 14 because it does not flow into the sanitary water supply 14.

1: Connection diagram of a conventional water pipe shown as an example.
Figure 2a: A photograph of a state in which the insertion portion of the water supply pipe is oxidized.
Figure 2b: A photograph of a very oxidized part of the water pipe.
Figure 3: Process diagram of a water pipe connection method shown as an example of the present invention.
4: a perspective view of a water pipe connection state shown as an example of the present invention.
Figure 5: an exemplary view of a state in which the connection of the water supply pipe is completed in the present invention.
Figure 6: Cross-sectional view of the state of clamping the turnbuckle in the present invention.
7: A cross-sectional view of a state in which the provisional assembly nut is fastened in the present invention.
Figure 8: Cross-sectional view of the connection of the water supply pipe is completed in the present invention.
Figure 9: Perspective view of the connection of the water supply pipe is completed in the present invention.
Figure 10: Partial sectional view of the insert in the present invention.
Figure 11: Cross-sectional view of a state in which the pressure wheel is coupled to the outer periphery of the shovel in the present invention.
Figure 12: In the present invention, a cross-sectional view of a state in which the rubber ring and the O-ring are combined with the outer ring of the shovel.
Figure 13: A cross-sectional view of a state in which the packing is coupled to the end of the shovel in the present invention.
Figure 14: a cross-sectional view of a state in which the packing is coupled to the end of the shovel in the present invention.
Figure 15: In the present invention, a cross-sectional view of a state in which the O-ring is pressed to the upper end surface of the packing insert.
Figure 16: In the present invention, a cross-sectional view of a state in which the plug is coupled to the socket portion of the water pipe.
Figure 17: In the present invention, a cross-sectional view of a state in which the plug is inserted into the socket portion of the water supply pipe.
Figure 18: A cross-sectional view of a state in which the fixing bolt is coupled to the pressure wheel in the present invention.
Figure 19: A cross-sectional view of a state in which the turnbuckle is clamped in the present invention.
Figure 20: A cross-sectional view of a state in which the provisional assembly nut is fastened in the present invention.
Figure 21: A cross-sectional view of a state in which the turnbuckle and the pulling bolt are separated in the present invention.
22: Cross-sectional view of the coupling state shown in the present invention.
Figure 23: Cross-sectional view showing a combined example of the present invention.
Figure 24: Packing sectional view showing an example of the present invention.
Figure 25: Packing sectional view showing another example of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail according to the accompanying drawings. In describing the embodiments of the present invention, the same components among the drawings are denoted by the same reference numerals as much as possible, and detailed descriptions of related well-known components or functions are omitted so as not to obscure the subject matter of the present invention, and also, the accompanying drawings. The items expressed in may be different from a form actually implemented in a schematic drawing to easily describe embodiments of the present invention.

The present invention combines the packing 17 of soft and tough properties to the side 6a of the water pipe 6, but the packing 17 is protruded to one side of the packing 17, and the outside of the tool 6 By covering the periphery, the flow or displacement of the packing 17 is prevented, and since the packing 17 is fixed to the insert 6, the socket part 5 and the insert of the water pipe 1 and 2 are inserted. 6) When joining, the pipe is tightly coupled between the socket portion 5 and the insert 6, thereby achieving accurate piping and stubborn watertightness.

In addition, the present invention when the socket portion 5 and the insert 6 of the water pipe (1) (2) when the water pipe (2) is installed on the outer periphery of the band 20 and the turnbuckle (21) which is a pulling means ), So that the socket part 5, the packing 17, and the insert 6 are brought into close contact, and then tightened with a bolt 8 in a pre-assembled state so that the pressure wheel 10 presses the rubber ring 7 so that the piping is When completed, by removing the band 20 and the pulling means, the water pipe 1 and the water pipe 2 are connected in a straight line to achieve accurate piping.

The present invention is coated with a general oil paint and located on the inside of the rubber ring (7), while the outer surface end of the insert (6) and the insert (6) side (6a) of the insert (6) are packed and packed (17). By being configured to wrap around the insert 18, foreign matter, etc., generated from the outer surface end of the insert 6 and the side 6a of the insert 6 is prevented from flowing into the water pipe 3, 4 through the gap 15. By doing so, contamination of the water supply 14 is prevented.

The upper end surface of the packing insert 18 is pressurized with an O-ring 16 as shown in FIG. 22, and the outer surface end of the insert 6 and the foreign matter generated at the side 6a of the insert 6 are packed 17 and By preventing it from flowing out of the packing insert 18, contact with the water supply 14 is essentially blocked to prevent contamination of the water supply 14.

In addition, by forming the inclined protrusion 18a on the upper surface of the end of the packing insert 18 as shown in FIG. 23, but being pressed by the inclined surface 5a of the socket part 5, a stronger pressing force than the O-ring 16 is achieved. Thus, paint powder, rust, etc. generated on the outer surface end of the shovel 6 and the side surface 6a of the shovel 6 coated with an oil paint are out of the packing 17 and the packing insert 18. By preventing it from leaking, contact with the water supply 14 is essentially blocked, thereby preventing the water supply 14 contamination.

Figure 3 illustrates a process diagram of a method for connecting a water pipe according to the present invention, a) preparing a water pipe to be connected (1) (2), and b) a socket part that is a connection part of the prepared water pipe (1) (2) ( 5) and cleaning the shovel (6), c) fitting the rolling wheel (10), the rubber ring (7) and the O-ring (16) to the outer periphery of the shovel (6), and d) the shovel (6). The step of preventing the flow or displacement of the packing 17 by contacting the packing 17 to the end of the packing, and then combining the packing insert 18 with a predetermined length on the outer periphery of the insert 6, and e) the rolling wheel 10 ) Temporarily installing the band (20) with the fastening means (19) on the outer periphery of the water supply pipe (2), and f) a plurality of fixing bolts (8) hooked to the socket part (5) by pressing (10 ) And then pre-assembled with a nut (9), g) fastening one screw portion (22) of the turnbuckle (21) to the end of the fixing bolt (8), and h) the other screw portion of the turnbuckle (21) ( 23) a plurality of pulling bolts (24) hooked to the band (20) ) Fastening step, i) rotating the turnbuckle 21 in the clamping direction so that the fixing bolt 8 and the pulling bolt 24 are close to each other, and the packing 17 between the socket part 5 and the insert 6 And tightly coupled step, j) by tightening the pre-assembled nut (9) and the pressure wheel (10) moves and presses the rubber ring (7) while completely sealing the socket (5) and the insert (6), k) The band 20 temporarily connected to the turnbuckle 21, the pulling bolt 24, and the water pipe 2 is separated from the water pipe 1 and 2 to complete the connection of the water pipe 1 and 2 Includes steps.

In the step d) of preventing the packing 17 from flowing or dislodging by combining the packing insert 18 with a predetermined length on the outer periphery of the insert 6, the o-ring (at the top of the outer periphery of the packing insert 18) 16) by inserting the end portion of the packing insert 18 into close contact with the outer periphery of the water pipe 2, for example, the insert 6, the end of the outer surface of the insert 6 and the side 6a of the insert 6 It further includes a step of preventing foreign matters and the like from being introduced (mixed) into the water supply 14.

The water supply pipe (water pipe) connection structure illustrated as an example of the present invention is as follows.

11, 12, the pressure ring 10, the rubber ring 7 and the O-ring 16 are sequentially fitted to the outer periphery of the insert 6 of the water supply pipe 2, and then the packing 17 as shown in FIGS. 13 and 14 ) The side of the insert (6) is in close contact with the side (6a) and then the packing insert (18) formed to extend to one side of the packing (17) is tightly coupled to the end of the insert (6), the side (6a) of the insert (6) ) And cover the end of the outer periphery, and then move the O-ring 16 pre-fitted to the upper end of the packing insert 18 to pressurize it as shown in FIGS. 15 and 22, so that the outer end and the insert of the insert 6 are pressed. 6) The oil paint powder or green water generated on the side surface 6a is not leaked, and thus the contact with the water supply 14 is fundamentally blocked, thereby preventing the water supply 14 contamination.

The packing 17 and the packing insert 18 and the O-ring 16 are made of a tough, soft and hygienic synthetic resin or rubber.

The width (w), thickness and length of the packing (17) depend on the diameter (or inner diameter or outer diameter) of the water supply pipe, but the width (w) is 10 to 200 mm, and the thickness (t) is the width (w). It may be 1/5 to 1/30, and the length of the packing insert 18 is preferably a length that does not contact the rubber ring 7.

The O-ring 16 is pre-fitting the outer periphery of the insert 6 as shown in FIG. 12 and then moved to the upper end surface of the packing insert 18 to press the end of the packing insert 18 or press the insert ( After the packing 17 and the packing insert 18 are coupled to the side 6a of 6) and the outer periphery, the end of the packing insert 18 can be pressed by fitting the O-ring 16.

Instead of the O-ring 16, as shown in FIGS. 23 and 25, an inclined angle (θ1) of the inclined surface 5a formed in the socket part 5 is formed by forming an inclined protrusion 18a on the upper end surface of the packing insert 18 ) A waterworks pipe (1) (2) by forming an inclined projection (18a) having a larger inclination angle (θ2), such as an inclination angle (θ2) of 3 to 10 ° greater than the inclination angle (θ1) of the inclined surface (5a) ) When connecting (piping), the stronger the pressing force acts as it moves to the end of the packing insert 18 by the pressing action of the inclined surface 5a, and accordingly, the outer end of the outer surface of the insert 6 coated with oil paint Even if paint powder, rust, and the like occur on the side 6a of the and the insert 6, the contact with the constant 14 is basically blocked while remaining in the packing 17 and the packing insert 18, thereby contaminating the constant 14 This is prevented.

That is, in the present invention, the packing 17 is in close contact with pressure between the coupling step 5b of the socket portion 5 and the side surface 6a of the insert 6, and the end of the packing insertion portion 18 is an O-ring 16 ) Or pressurized by the inclined protrusions (18a) to prevent the inflow of water (14) after piping construction, but rust does not occur, but paint powder, rust, etc. generated before and after piping construction are packed (17) and the packing insert While staying in the space between 18 and the insert 6, contact with the constant 14 is essentially blocked.

In addition, as shown in FIGS. 4, 6, and 16 to 19, temporarily install a band 20 of a predetermined height as a fastening means 19 on the outer periphery of the water pipe 2 close to the rolling wheel 10, and then, FIG. 16 As shown in Fig. 6, the insert 6 of the water supply pipe 2 to which the packing 17 is coupled is coupled to the socket 5 of the water supply pipe 1, and the side surface of the packing 17 is brought into close contact with the engagement step 5b. 18, the locking portion 8c of the fixing bolt 8 is locked to the locking portion 5c of the socket portion 5, and the screw portion 8b of the fixing bolt 8 is through 10a of the pressure wheel 10 6), then temporarily assemble the nut 9 as shown in FIGS. 6 and 19, and fasten one screw portion 22 of the turnbuckle 21 to the end of the fixing bolt 8, and the other screw portion of the turnbuckle 21 When the plurality of pulling bolts 24 engaged with the band 2 are fastened to 23, and then the turnbuckle 21 is rotated in the clamping direction, the fixing bolts 8 and the pulling bolts 24 are brought closer to each other. 5) and the packing (17) combined between the insert (6) Pressurized close and the water pipe (1) and the water pipe (2) are maintained in a straight line, the fastening nut 9 is tightened in the tightening direction as shown in Figs. When the socket portion 5 and the insert 6 are completely sealed while moving and pressing, and the piping connection is completed, the turnbuckle 21 is rotated in the opposite direction to tighten, and when released, the turnbuckle 21 and the pulling bolt 24 as shown in FIG. ), And when the band 20 disassembled by the fastening means 19 is separated from the water pipe 2, the connection work of the water pipes 1 and 2 is as shown in FIGS. 8, 9, and 22. It is completed.

In the present invention, the fixing bolt (8) is fitted into each through hole (10a) of the pressure wheel (10) and then fixed and fastened with each nut (9), and the pulling bolt (24) is the diameter of the water pipe (1) (2) ( Alternatively, depending on the inner diameter or outer diameter), 3 to 10 can be used so that the water supply pipe 1 and the water supply pipe 2 can be maintained in a straight line. For example, when connecting a 1,100 mm diameter water pipe (1) (2), about 22 fixing bolts (8) and nuts (9) are used to fix the pressure wheel (10), but only 4 to 8 pulling bolts (24) are used. Even if used, the water pipe 1 and the water pipe 2 are kept in a straight line, and the packing 17 is pressurized with an even pressure.

In the present invention, the band 20 is exemplified as being separated into four in the case of a 1,100 mm diameter water pipe, but is divided into two to ten depending on the diameter (or inner diameter or outer diameter) of the water pipe.

The band 20 has a radius of curvature equal to the outer diameter of the applied water pipes 1 and 2, and outward protrusions 25 and 26, respectively, having at least two or more bolt insertion holes formed at both ends, are formed. 4, 5, a plurality of bands 20 are wrapped around the outer circumference of the water supply pipe 2, and then the bolts 28, which are fastening means 19, are inserted into the bolt insertion holes of the neighboring outward protrusions 25 and 26. After inserting each of them, each of them is fastened with a nut 29 to be firmly fixed to the water supply pipe 2, and then the hook portion 24b of the pulling bolt 24 can be hooked and used.

The predetermined space 27 is formed between the band 20 and the band 20 so that the fastening means 19 can be firmly fastened.

The height of the band 20 is a height at which the fixing bolt 8 and the pulling bolt 24 fastened to the turnbuckle 21 can be fastened in a straight line.

In the present invention, the fixing bolt 8, the nut 9, and the turnbuckle 21 are configured to have the same outer diameter so that they can be tightened or relaxed with a spanner, a large wrench, a torque wrench, etc. of the same size, thereby increasing work efficiency. It can be preferred.

The present invention as described above is not limited to the present embodiment and the accompanying drawings, and various substitutions, modifications, and changes are possible within the scope not departing from the technical spirit of the present invention, which is in the technical field to which the present invention pertains. It is obvious for those with ordinary knowledge.

(1) (2)-Waterworks (3) (4)-Waterworks
(5)-Socket section (5a)-Socket slope
(5b)-Coupling step (5c)-Hanging protrusion
(6)-insert (6a)-insert side
(7)-Rubber ring (8)-Fixed bolt
(8a) (24a)-Hanging part (8b) (24b)-Screw part
(9)-Nut (10)-Pressure wheel
(11)-Interior finish (12)-Exterior finish
(13)-foreign material (14)-constant
(15)-Cheat (16)-O-Ring
(17)-Packing (18)-Packing insert
(18a)-Inclined projection (19)-Measurement means
(20)-Band (21)-Turnbuckle
(22) (23)-Screw part (24)-Pull bolt
(25) (26)-Outward protrusion (27)-Space
(28)-Bolt (29)-Nut

Claims (2)

In the water pipe connection structure for coupling the socket portion 5 and the insert (6) of the water pipe,
A soft packing 17 installed between the socket part 5 and the insert 6 of the water supply pipe;
The side of the packing 17 in close contact with the side 6a of the insert 6 of the water pipe 2;
It is extended to one side of the packing 17 and prevents oxides and foreign matter generated from the outer surface end of the insert 6 and the side surface 6a of the insert 6 from flowing into the water pipe 3, 4, and extends to one side of the packing 17. A packing insert 18 covering the end portion of the outer periphery;
O-ring (16) to prevent the flow of the packing 17 by pressing the upper end surface of the packing insert 18 and prevent the inflow of oxides and foreign substances generated in the insert 6 into a constant; Including,
The width (w) of the packing 17 is 10 to 200 mm,
The thickness (t) of the packing 17 is 1/5 to 1/30 of the width (w). In the water pipe connection structure for coupling the socket portion 5 and the insert (6) of the water pipe,
A soft packing 17 installed between the socket part 5 and the insert 6 of the water supply pipe;
The side of the packing 17 in close contact with the side 6a of the insert 6 of the water pipe 2;
It is extended to one side of the packing 17 and prevents oxides and foreign matter generated from the outer surface end of the insert 6 and the side surface 6a of the insert 6 from flowing into the water pipe 3, 4, and extends to one side of the packing 17. A packing insert 18 covering the end portion of the outer periphery; Including,
An inclined protrusion 18a having an inclined angle θ2 is formed on an upper surface of the end of the packing insert 18, but the inclined angle θ2 of the inclined protrusion 18a is an inclined surface formed in the socket part 5 By having a 3 to 10 ° greater inclination than the inclination angle (θ1) of (5a), the stronger the pressing force acts as it moves to the end of the packing insert 18 by the pressing action of the inclined surface 5a. Water pipe connection structure.

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