KR100864057B1 - Connector for newtility type multiplex pipe with packing means for sealing - Google Patents

Abstract

The present invention relates to a pipe coupling device for a composite composite pipe having an airtight packing means. In the present invention, the airtight packing means is fitted to the outer circumferential surface of the pipe and the upper inclined surface is inclined upward and the inclined bottom is inclined downward. A base ring member comprising: an upper ring member having an inclined surface to be in close contact with the upper inclined surface of the base ring member, and a lower ring member having an inclined surface to be in close contact with the lower inclined surface of the base ring member; do. The pipeline connection device of the present invention comprises a first fastener coupled to an end of the first pipeline so as to connect a corresponding first pipeline and a second pipeline, and a second fastener coupled to the end of the second pipeline. The first fastener has a threaded portion to enable screwing with the second fastener on an outer circumferential surface thereof, and an operation portion for gripping and engaging with the second fastener through tightening on the rear side of the screwed portion. 2 fasteners are provided with a screw portion to enable the screw coupling with the first fastener on the inner circumferential surface, and an operation portion for gripping and rotational pressing when engaging with the first fastener through tightening on the outer circumferential surface, the second fastening The sphere is freely rotated to allow engagement with the first fastener in a state of being caught by a predetermined airtight means fixed to the end of the second conduit.

 For airtight, packing means, pipeline, connecting device, ring member, fastener, screw part, rotation

Description

CONNECTOR FOR NEWTILITY TYPE MULTIPLEX PIPE WITH PACKING MEANS FOR SEALING}

1 is an exploded perspective view showing an example of a conventional pipe connecting device,

2 is a cross-sectional view of FIG.

Figure 3a to 3c is a view showing an embodiment of the hermetic packing means according to the present invention and its coupling form,

Figures 4a to 4c is a view showing another embodiment of the hermetic packing means according to the present invention and its coupling form,

5a to 5c is a view showing an embodiment of a pipe connecting apparatus according to the present invention,

6a and 6b is a view showing a state of use of the pipe connection device according to Figures 5a to 5c,

7 is an enlarged cross-sectional view of the conduits shown in FIG. 5A.

* Description of the symbols for the main parts of the drawings *

101,102: pipeline 111,114: foundation ring member

111a, 114a: protrusion line 112: upper ring member

113: lower ring member 115: outer ring member

120: o-ring 130: first fastener

132,144: screw portion 133,142: operation portion

134,143: Holding projection 135: Fitting groove

140: second fastener 141a: locking projection

145: locking projection 150: locking key

151: pressing part 152: elastic part

153a: slide slope 153c: locking cross section

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a pipe connecting device for a composite pipe having a hermetic packing means for use in a cylindrical pipe such as a water and sewage pipe, a rain pipe, an electric wire storage pipe, or the like.

As is known in the art of connecting two or more pipes (pipes), that is, socket type, heat shrinkage type, fusion type, etc. are well known and commonly used.

However, as described in the applicant's Korean Patent Registration No. 0562782, the socket type, the heat shrink type, and the fusion type have many disadvantages in use, and in order to improve these disadvantages, the applicant is easy to connect and connect the pipes in the registered patent. In addition, the company introduced a pipe connection device that is robust, improves watertightness, and requires less labor and cost.

The pipe connecting device introduced in the applicant's patent No. 0562782 will be briefly described with reference to FIGS. 1 and 2.

The pipe connecting device of the above patent is a pair of fixing members 30 and 40 that are fitted to each end of the corresponding pipes and fixed to one of these fixing members, the other side of the fixing member is coupled to the corresponding Consists of a fastening member 50 for fastening.

Of these fixing members, the first fixing member 40 has a protrusion 42 formed at one end thereof, and the second fixing member 30 has a concave portion 33 formed at one end thereof. When the connection between the second fixing member 40 and the second member 30, the recess 33 is shown in the connection form is inserted into the contact portion 42 close.

In addition, the second fixing member 30 is formed with a first threaded portion 31 on the outer circumferential surface, and the fastening member 50 has a second threaded portion 51 formed on the inner circumferential surface of these screw portions 31 and 51. The coupling between the first fixing member 40 and the second fixing member 30 is made. On the other hand, the O-ring member 60 is provided between the first fixing member 40 and the second fixing member 30 to perform watertight or airtight action.

The use of the pipe connecting device of FIGS. 1 and 2 having such a configuration includes the first fixing member 40 and the second fixing member 30 coupled to respective ends of the corresponding pipes 10 and 20. After inserting the O-ring member 60 between the second fixing member 30 by rotating the fastening member 50 which is fixed to the locking portion 41 of the first fixing member 40 in a locked state. The first screw portion 31 of the second fixing member 30 and the second screw portion 51 of the fastening member 50 are engaged with each other to be fixed in a screwing form.

According to the pipe connection device of Patent No. 0562782 as described above, the connection work is simpler than the conventional socket type, heat shrinking type, fusion type, etc., which can significantly reduce the work maneuver, and also greatly reduce the cost required for installation. In addition, the pipe connecting device can prevent leakage at the connecting part of the pipe, especially when the water supply increases rapidly, such as during flooding, and the connection part of the pipe easily breaks even when a large pressure is applied to the inside of the pipe. Can be completely prevented.

On the other hand, in the case of all the connection devices for a long time used to loosen the connection site, the possibility of water leakage through the micro-gap of this loose connection site will not be completely excluded.

In particular, in the above-described patent invention, since the pipe connection structure is provided by a screw coupling method, the connection state of the pipe is gradually decreased due to the corrosion of the connection device or the water pressure acting on the connection part. It may come loose, which may lead to leaks in the pipe connection part of the connecting device.

The present invention has been made to solve the above problems, and provided with an airtight packing means to suppress the leakage as much as possible even if corrosion occurs in the site connecting the pipe or if the tightening state of the connecting device is somewhat loosened. In addition, it is an object of the present invention to provide a pipe connecting device for the nucleitic composite pipe to block the loosening of the pipe connection to maintain the initial tightening state.

An object of the present invention as described above, the base ring member which is fitted to the outer peripheral surface of the pipeline and the circumferential portion is inclined upwardly and the lower inclined surface inclined downward, the inside is inclined so as to be in close contact with the upper inclined surface of the base ring member And a lower ring member having an inclined surface in close contact with the lower inclined surface of the foundation ring member, wherein the foundation ring member has an upper ring member and a lower ring member respectively on upper and lower inclined surfaces. Part of the incision is contracted to be in close contact with the outer circumferential surface of the conduit when it is in close contact with the inner diameter direction, and the base ring member is not sliding when the upper ring member and the lower ring member are in close contact with each other. Projection lines are provided on the inner circumferential surface thereof so as to be fixed to the outer circumferential surface of the pipe line. It is achieved by providing an airtight packing means characterized in that the blade has a toothed structure toward the lower ring member side corresponding to the member.

It is also an object of the present invention to provide a base ring member comprising an inclined surface that is fitted to the outer peripheral surface of the conduit and whose circumference is inclined upwardly or downwardly, and an outer ring member having an inwardly inclined surface in close contact with the outer peripheral inclined surface of the base ring member. The base ring member includes one end of the outer circumferential inclined surface protruding to support an end of the outer ring member, and contracts in the inner diameter direction when the outer ring member is in close contact with the outer circumferential inclined surface to closely adhere to the outer circumferential surface of the conduit. A portion thereof is incised so that a protrusion line is provided on an inner circumferential surface thereof so that the outer ring member is fixed to the outer circumferential surface of the conduit without sliding when the outer ring members are in close contact with each other. Providing an airtight packing means characterized in that the blade structure is formed in the direction of the saw blade. Is achieved.

Another object of the invention consists of a first fastener coupled to an end of a first conduit to connect a corresponding first conduit and a second conduit, and a second fastener coupled to an end of the second conduit, The first fastener has a threaded portion to enable screwing with the second fastener on an outer circumferential surface thereof, and an operation portion for gripping and engaging with the second fastener through tightening on the rear side of the screwed portion. 2, the fastener is provided with a screw portion to enable the screw coupling with the first fastener on the inner circumferential surface, and an operation portion to enable rotational pressing by gripping when engaging with the first fastener through tightening on the outer circumferential surface, the second The fastener is freely rotated to allow engagement with the first fastener in a state of being caught by a predetermined airtight packing means fixed to an end of the second conduit, and each of the operation units A gripping protrusion is provided on an outer circumferential surface to enable rotational press for the impingement coupling, and the second fastener is in a direction corresponding to the operation unit so as to remain locked to the airtight packing means fixed to an end of the second conduit. A locking protrusion is provided at an end portion of the first fastener, and a locking key is provided on an outer circumferential surface of the first fastener so as to prevent disconnection of the corresponding first fastener and the second fastener. And a locking projection for maintaining a locking state with the locking key, wherein the locking key has a slide inclined surface to allow the locking projection to slide in a locking direction when the first and second fasteners are coupled, and the locking protrusion in a release direction. A locking end surface positioned on a corresponding side of the slide inclined surface to block rotation of the slide inclined surface; And a pressing portion configured to release a locking state of the locking projection and the locking end surface by pressing the elastic portion downward on the upper portion of the 'c'-shaped elastic part inserted into the fitting groove on the slide inclined surface and the locking end surface. The first fastener has a fitting groove into which the locking key is inserted and fixed on the boundary between the control unit and the screw unit, and the slide inclined surface and the engaging cross section are integrally provided on one side of the locking key, and the pipe is made of synthetic resin material. A composite pipe, which is formed between an inner layer forming a flow path therein, an outer layer exposed directly to the buried soil, and between the inner layer and the outer layer to impart durability such as pressure resistance, impact resistance, corrosion resistance, and cold resistance to the tube. It has the form of a triple tube consisting of an intermediate layer, the inner layer and the outer layer is relatively thinner than the intermediate layer, the intermediate layer And the pores with a uniform distribution of the insert exists, is achieved by providing a pipe connection device which comprises a filling material to the insert role.

According to the present invention described above, even if corrosion occurs in the portion connecting the pipeline or the tightening state of the connecting device is somewhat loosened, it is possible to suppress the leakage as much as possible, and to block the loosening phenomenon of the connecting portion of the first connection state It will be able to maintain it, which will prevent leakage.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the pipeline connecting device of the airtight packing means according to the present invention and a nutty type composite pipe having the same.

3a to 3c of the accompanying drawings is a view showing an embodiment of the hermetic packing means according to the present invention and its coupling form. According to one embodiment of the invention according to FIGS. 3A-3C,

The present invention, the base ring member 111, the base ring member 111 is composed of the upper inclined surface 111b and the lower inclined surface 111c inclined upwardly and fitted around the outer circumferential surface of the conduit 101. The inside of the inclined surface 113a to be in close contact with the upper ring member 112 having the inclined surface 112a and the lower inclined surface 111c of the base ring member 111 to be in close contact with the upper inclined surface 111b. It provides an airtight packing means comprising a lower ring member 113 made of.

In the airtight packing means according to the present embodiment, the base ring member 111 is a pipe line when the upper ring member 112 and the lower ring member 113 are in close contact with each of the upper and lower inclined surfaces 111b and 111c. A portion thereof is formed in a shape 111d (refer to FIGS. 3A and 3B) cut in close contact with the outer peripheral surface of the 101.

In the airtight packing means according to the present embodiment, the base ring member 111 slides when the upper ring member 112 and the lower ring member 113 are in close contact with each other on the upper and lower inclined surfaces 111b and 111c. The projection line 111a is provided on the inner circumferential surface thereof so as to be fixed to the outer circumferential surface of the conduit 101.

In the present exemplary embodiment, the protrusion line 111a has a sawtooth structure in which a blade is lined toward the lower ring member 113 corresponding to the upper ring member 112.

In the airtight packing means according to the present embodiment, the upper ring member 112 and the lower ring member 113 are in close contact with the upper and lower inclined surfaces of the base ring member 111 so that the coupling cross section forms a rectangular structure. Outside 112b, 112c and 113b and 113c corresponding to the respective inclined surfaces 112a and 113a are formed at right angles.

On the other hand, in the present invention, the O-ring 120 that is fitted to the outer peripheral surface of the conduit 101 is further provided on one side of the airtight packing means.

4a to 4c of the accompanying drawings is a view showing another embodiment of the hermetic packing means according to the present invention and its coupling form. According to another embodiment of the invention according to FIGS. 4A-4C,

The present invention corresponds to a base ring member 114 that is fitted to an outer circumferential surface of a conduit 101 and includes an inclined surface 114b having a circumferential portion inclined upwardly or downwardly, and an outer circumferentially inclined surface 114b of the base ring member 114. And an outer ring member 115 formed of an inclined surface 115a to be in close contact with each other, and the base ring member 114 has one end of the outer circumferential inclined surface 114b to support an end of the outer ring member 115. Provides an airtight packing means, characterized in that protruding.

In the hermetic packing means according to the present embodiment, the base ring member 114 contracts in the inner diameter direction when the outer ring member 115 is in close contact with the outer circumferential inclined surface 114b to closely adhere to the outer circumferential surface of the conduit 101. A portion thereof is preferably provided in a cut form 114d (see FIGS. 4A and 4B).

In the hermetic packing means according to the present embodiment, the base ring member 114 is fixed to the outer circumferential surface of the conduit 101 without sliding when the outer ring member 115 is closely coupled to the outer circumferential inclined surface 114b. Protrusion line 114a is provided on the inner circumferential surface.

In the present embodiment, the protrusion line 114a has a sawtooth structure in which a blade is lined in a direction corresponding to the outer ring member 115.

In the hermetic packing means according to the present embodiment, when the outer ring member 115 is closely coupled to the outer circumferential inclined surface 114b of the base ring member 114, the inner inclined surface 115a forms a rectangular cross section. The outside corresponding to the right angle is made.

On the other hand, in the present invention, the O-ring 120 that is fitted to the outer peripheral surface of the conduit 101 is further provided on one side of the airtight packing means.

Figures 5a to 5c of the accompanying drawings is a view showing an embodiment of a pipe connecting device for the nutty type composite pipe according to the present invention. According to one embodiment of the invention according to FIGS. 5A-5C,

According to the present invention, the first fastener 130 and the second conduit 101 are coupled to an end of the first conduit 102 so as to connect the corresponding first conduit 102 and the second conduit 101. It consists of a second fastener 140 is coupled to the end, the first fastener 130 is a screw portion 132 to be screwed with the second fastener 140 on the outer circumferential surface and the screw portion On the rear side of the 132 is provided with an operation unit 133 to enable rotational pressing by holding the hand when engaging with the second fastener 140 by tightening, the second fastener 140 is the inner peripheral surface to the Screw 144 to allow the first fastener 130 and the screw coupling, and the operation unit 142 to enable rotational pressure by gripping by hand when engaging the first fastener 130 by tightening on the outer peripheral surface ), Wherein the second fastener 140 is coupled to the first fastener 130 in a state of being caught by an airtight packing means 110 that is fixed to an end of the second conduit 101. It provides a pipe connection device characterized in that the rotation is provided freely to enable the combination of.

According to the conduit connection device of the present invention, each operation unit 133, 142 is formed in the shape provided with the projections (134, 143) for holding on the outer circumferential surface to enable rotational pressing for tightening coupling.

In the present invention, the second fastener 140 is a block at the end of the direction corresponding to the operation unit 142 so as to remain locked to the airtight packing means 110 fixed to the end of the second conduit 101. Group 141a.

According to the pipeline connection device of the present invention, the locking key 150 on the outer circumferential surface of the first fastener 130 to prevent the connection of the first fastener 130 and the second fastener 140 corresponding to each other; Is provided and the locking projection 145 for maintaining the locking state with the locking key 150 is provided on the upper inner circumference of the second fastener (140).

The locking key 150 is a slide inclined surface 153a for allowing the locking projection 145 to be rotatable in the locking direction when the first fastener 130 and the second fastener 140 are coupled, and in the unlocking direction. A locking end surface 153c is disposed on a corresponding side of the slide inclined surface 153a to block rotation of the locking protrusion 145.

In the present invention, the slide inclined surface 153a and the engaging end surface 153c are integrally provided on one side of the lock key 150.

In addition, the first fastener 130 in the pipeline connection device of the present invention is provided with a fitting groove 135 in which the locking key 150 is inserted and fixed on the boundary between the operation unit 133 and the screw unit 132, the lock The key 150 is a 'c' shaped elastic part 152 inserted into the fitting groove 135 at the lower portion of the slide inclined surface 153a and the locking end surface 153c, and the slide inclined surface 153a and the locking end surface ( The pressing portion 151 is configured to release the locking state of the locking projection 145 and the locking end surface 153c by pressing the elastic portion 152 downward on the upper portion of 153c.

Meanwhile, reference numeral 152a in FIG. 5B denotes a 'supporting end', reference numeral 153 denotes a 'ridge', and reference numeral 153b denotes a 'intersection'.

From the above-described configuration, the use of the nutty type composite pipe conduit connection device having the airtight packing means of the present invention will be described (see FIGS. 3A to 5C).

6 is a view illustrating a state of use of the pipe connection device according to FIGS. 5A to 5C, and FIG. 6A illustrates a fastening state of the pipe connection device, that is, a locking and tightening process using the locking key of FIG. 5B. The loosened state of the pipe connecting device, that is, the separation process of the pipe connecting device by a lock key operation from FIG.

First, as shown in FIG. 6A, the fastening of the pipe connecting device is performed in the opposite direction to the first fastener 130 and the second fastener 140 in the locking direction of the screw portions 132 and 144, as understood from the configuration of FIG. 5A. By rotating it. At this time, since the locking key 150 is inserted into and fixed to the fitting groove 135 of the first fastener 130, the locking protrusion 145 of the raised end 153 is rotated by the second fastener 140. It slides in the locking direction (→) along the slide inclined surface 153a to be moved. Meanwhile, in the fastened state of the pipe connection device, the locking protrusion 145 moves along the slide inclined surface 153a and the locking end surface 153c of the locking key 150 is locked as shown in FIG. 6A. Since the first fastener 130 and the second fastener 140 is prevented from being separated.

In addition, the release of the pipe connecting device in Figure 6b is pressed down the pressing portion 151 (see Figure 5b) of the locking key 150 from the fastening state of Figure 6a after the first fastener 130 and the second fastener ( 140 may be rotated in opposite directions in the unwinding direction ← of the threaded portions 132 and 144. In this case, in the locking key 150, pressing down the pressing part 151 presses the elastic part 152 (see FIG. 5B) so that the ridge end 153 descends toward the support end 152 (FIG. 5B). As a result, as shown in FIG. 6B, the locking state of the locking protrusion 145 by the locking end surface 153c is released to enable separation of the first fastener 130 and the second fastener 140. Will be.

FIG. 7 of the accompanying drawings is an enlarged cross-sectional view of the structure of the pipelines shown in FIG. 5A. The pipelines of FIG. 5A in which the pipeline connection device of the present invention is used are specifically provided with a newtility type multiplex pipe of the type shown in FIG. 7.

The nutty type composite pipe is made of a synthetic resin material, the inner layer 10 forming the flow path 40 therein, the outer layer 30 directly exposed to the buried soil, and the inner layer 10 and the outer layer 30. ) And has a form of a triple tube made of an intermediate layer 20 which imparts durability such as pressure resistance, impact resistance, corrosion resistance, and cold resistance to the tube.

Such a triple tube is manufactured by using PE, which is relatively thinner than the intermediate layer 20, and the outer layer 30 is made of PE. In the case of the inner layer 10, the fluid flows in the flow path 40. The surface must be uniform and have high water resistance, moisture resistance, etc. to facilitate the flow, and in the case of the outer layer 30, the mechanical strength must be large and the abrasion resistance must be large to withstand physical friction and chemical erosion with the soil, and chemical and electrical Not only should it be inert, but it is required to be flexible enough to absorb the compression and relaxation shock applied to the pipes according to the seasonal temperature and consequently, when used after the actual buried. This is because the material that best meets the requirements of PE is a flexible thermoplastic resin.

In the triple tube, the outer layer 30 is made thicker than the inner layer 10, which is more in comparison with the inner layer 10 in which the outer layer 30 is in constant contact with the fluid of the same property due to its direct contact with the soil. This is because it requires great durability.

In the present invention, the intermediate layer 20, which serves to provide a thickness and a durability according to a triple thickness or more in the triple pipe, is a composite mineral PE recycled resin including a mineral composite PE recycled resin, specifically, a PE recycled resin and a mineral composite resin. It consists of.

The PE recycled resin is a PE recycled resin having a PE separation efficiency of 90% by weight or less, preferably a PE recycled resin having a PE separation efficiency of 60-90% by weight, specifically, 60-88% by weight of recycled PE, 10- PE recycled resin comprising 38% by weight of thermoplastic mixed resin, 0.5% by weight of stearic acid as a dispersant and 1.5% by weight of Ca-Ba-Zn-based organic composite as a heat stabilizer.

The thermoplastic mixed resin is a waste resin recycled resin mixed with thermoplastic resins such as polyvinyl chloride (PVC), polypropylene (PP), polyterephthalate (polyethylene terephthalate; PET), and the like. Any may be included. The mineral composite resin is to give a specific gravity of 1g / cm3 or more of the specific gravity of the triple pipe, 85% by weight of CaCO3, 13% by weight of low density polyethylene (LDPE) and 2% by weight of dispersant (stearic acid) It is a mineral substance containing resin containing.

In the intermediate layer 20 of the present invention, the PE recycled resin is used in an amount of 55-65% by weight and the mineral composite resin is 35-45% by weight, so the actual content of the recycled PE intermediate layer is 33-58.5% by weight. And the actual content in the middle layer of CaCO3 is 29.75-38.25% by weight.

CaCO3 contained in this content increases the overall average specific gravity of the triple pipe to 1.2-1.3g / cm3, so that when the pipe is actually buried and exposed, the pipe is exposed to and damaged due to rainwater inflow, groundwater outflow, etc. It can be prevented.

On the other hand, the triple tube intermediate layer 20, as shown in Figure 2, there are uniformly distributed inserts 21, which has a melting point above the melting temperature applied during the manufacture of PE recycled resin, the resin remaining unmelted As uniformly dispersed, it serves as a filler of the intermediate layer 20.

In addition, the intermediate layer 20 of the triple tube, as shown in Figure 2, the pores 22 are formed, which is 0.1% by weight of the resin mixture with the mixture of the mineral-containing resin and PE recycled resin in the intermediate layer production Since the blowing agent is added, the pores thus formed absorb some of the impact applied to the triple pipe from the outside during use to prevent breakage. In the present invention, the intermediate layer 20 is specifically composed of a thickness of more than the inner layer + outer layer thickness.

According to the above description, the present invention can provide the airtight packing means of the above-described type so that leakage can be suppressed as much as possible even if corrosion occurs at a portion connecting the pipe line or the tightening state of the connecting device is loosened.

In addition, the present invention is to provide a pipe connecting device having an operation structure as described above to block the loosening phenomenon of the pipe connecting portion to maintain the initial tightening state it is possible to prevent leakage.

As described above, the present invention can suppress the leakage as much as possible even if corrosion occurs in the portion connecting the pipeline or the tightening state of the connecting device is somewhat loose, and the first tightening state is blocked by blocking the loosening of the pipe connecting portion. It will be able to maintain it, which will prevent leakage.

Claims (4)

A first fastener coupled to an end of the first conduit to connect the corresponding first conduit and the second conduit, and a second fastener coupled to the end of the second conduit, the first fastener being connected to the outer circumferential surface; And a screw portion for enabling screw engagement with the second fastener, and an operation portion for gripping and engaging with the second fastener through tightening on the rear side of the screw portion, wherein the second fastener is formed on the inner circumferential surface thereof. And a screw portion to enable screwing of the first fastener and an operation portion to allow rotational pressure by gripping when engaging the first fastener through tightening on an outer circumferential surface, wherein the second fastener is an end portion of the second conduit. Rotation is provided freely to be coupled to the first fastener in a state of being locked to a predetermined hermetic packing means fixed to the, each operation unit is rotated for tightening coupling A gripping protrusion is provided on an outer circumferential surface to enable pressure, and the second fastener is caught at an end portion in a direction corresponding to the operation part so as to remain locked to the airtight packing means fixed to an end of the second conduit. And a locking key on an outer circumferential surface of the first fastener so as to prevent disconnection of the first fastener and the second fastener corresponding to each other, and the first fastener has the locking key on the boundary between the operation part and the screw part. It is provided with a fitting groove that is inserted and fixed, the locking projection for maintaining the locking state with the locking key is formed on the upper inner circumference of the second fastener, The locking key is located on a slide inclined surface to allow the locking projection to slide in the locking direction when the first fastener and the second fastener are coupled, and on the corresponding side of the slide inclined surface to block rotation of the locking protrusion in the unlocking direction. It has a locking cross section, the 'c' shaped elastic portion is inserted into the fitting groove in the lower portion of the slide inclined surface and the locking cross section, and the locking projection and the locking cross section by pressing the elastic portion downward on the top of the slide inclined surface and the locking cross section Is provided with a pressing portion to release the locking state of, the slide inclined surface and the locking end is provided integrally on one side of the locking key, The first and second pipes are synthetic resin-type nutritic composite pipes, which are formed between an inner layer forming a flow path therein, an outer layer exposed directly to the embedded soil, and between the inner layer and the outer layer, and having a pressure resistance to the tube. It has the form of a triple tube consisting of an intermediate layer to impart durability, such as impact resistance, corrosion resistance, cold resistance, the inner layer and the outer layer is relatively thinner than the intermediate layer, the intermediate layer with pores uniformly distributed And there exists, wherein the inserts serve as filler material. The method of claim 1, wherein the airtight packing means A base ring member fitted to an outer circumferential surface of the second conduit and including an upper inclined surface inclined upwardly and a lower inclined inclined downwardly; An upper ring member having an inclined surface in close contact with the upper inclined surface of the foundation ring member; And a lower ring member having an inclined surface in close contact with the lower inclined surface of the foundation ring member. When the upper ring member and the lower ring member are in close contact with the upper and lower inclined surfaces, the base ring member is partially cut to contract in the inner diameter direction to be in close contact with the outer circumferential surface of the second conduit. When the upper ring member and the lower ring member in close contact with each other is provided with a projection line on its inner circumferential surface to be fixed to the outer circumferential surface of the second conduit without sliding, The protruding line has a toothed structure with a blade lined toward the upper ring member and the lower ring member, and the upper ring member and the lower ring member are coupled to the upper and lower inclined surfaces of the base ring member in close contact with each other. Pipe line connecting device, characterized in that the outside corresponding to the inclined surface of each inside in a rectangular shape so that the cross section has a rectangular structure. The method of claim 1, wherein the airtight packing means A base ring member fitted to an outer circumferential surface of the second conduit and formed of an inclined surface in which a circumference thereof is inclined upward or downward; And an outer ring member formed of an inclined surface to be in close contact with the outer circumferential inclined surface of the foundation ring member, One end of the outer circumferential inclined surface protrudes to support an end of the outer ring member, and the base ring member contracts in the inner diameter direction when the outer ring member is in close contact with the outer circumferential inclined surface, thereby contracting the outer circumferential surface of the second conduit. A portion thereof is cut to closely adhere to each other, and a protrusion line is provided on an inner circumferential surface thereof so that the outer ring member is fixed to the outer circumferential surface of the second conduit without sliding when the outer ring members are in close contact with each other. The protrusion line has a sawtooth structure in which the blade is lined in a direction corresponding to the outer ring member, and the outer ring member is inclined to form a rectangular structure when the outer ring member is in close contact with the outer circumferential inclined surface of the base ring member. Pipe fittings, characterized in that the outside corresponding to the right angle form. delete

Images