WO2014030829A1

WO2014030829A1 - One-touch three-stage joining apparatus for fittings for connecting pressure pipes, and method for constructing pressure pipes using same

Info

Publication number: WO2014030829A1
Application number: PCT/KR2013/004519
Authority: WO
Inventors: 강석근
Original assignee: Kang Suk-Keun
Priority date: 2012-08-24
Filing date: 2013-05-24
Publication date: 2014-02-27
Also published as: JP2015531046A; JP6005862B2; KR101207634B1; CN104813089B; CN104813089A

Abstract

The present invention relates to a one-touch three-stage joining apparatus for fittings for connecting pressure pipes, and to a method for constructing pressure pipes using same. More particularly, an organic joining structure comprising a fixing structure formed in a pressure pipe insertion/tight-contact portion (A) and a bushing insertion/tight-contact portion (D), a double frictional resistant structure formed by a joining element (20), and a watertight structure formed by watertight rubber packing is arranged in the fitting for connecting pressure pipes, thus achieving a one-touch joining structure in which the joining/fixing of the pressure pipes can be achieved simply by the single operation of pushing the pressure pipes into the fitting for connecting the pressure pipes. As the apparatus and method of the present invention adopt a one-touch system, easy joining/connection and efficient connecting work can be achieved, and a construction period can be shortened. Further, the apparatus of the present invention adopts a one-touch joining/fixing structure using pressure pipe insertion equipment, thus eliminating the necessity of direct joining work by a worker to thus eliminate the necessity of a separate space for excavation work, thereby enabling an excavation to be performed in an efficient and economically advantageous manner.

Description

One-touch three-stage fastening device of the joint pipe for pressure pipe connection and construction method of pressure pipe using the same

The present invention relates to a one-touch three-stage fastening device for a pressure pipe connection pipe and a method for constructing a pressure pipe using the same, and in particular, the 'fixed structure' formed on the pressure pipe insertion / adhesion part (A) and the bushing insertion / adhesion part (D) and The pressure pipe is connected solely to the pressure pipe by forming an organic fastening structure consisting of a 'double friction resistance structure' by the fastener 20 and a 'watertight structure' by watertight rubber packing. It is characterized by having a one-touch fastening structure in which the joint and fixing are completed by only one operation to be pushed into the joint pipe.

As it is one-touch method, it is easy to connect and connect, so that the connection work is not only efficient, but also the air is shortened. Also, the one-touch connection and fixing structure by the pressure tube insertion equipment does not require the operator to do the joint work directly. Excavation work is efficient and economical useful invention because no separate work excavation space is required.

A pipe, such as a water supply pipe, an oil supply pipe, a gas pipe, which flows due to a pressure difference, is called a pressure pipe. The fluid flow in the pressure tube flows due to the difference in pressure across the pressure tube. Fluids such as water, oil or gas are transported to dozens of hundreds of kilometers through water pipes or pipelines. The length of the pressure tube is made in a certain unit length for the convenience of manufacture and transportation. A pressure tube is installed next to the unit length. In this case, the connecting pipe connecting the unit length is commonly referred to as a "joint pipe". (See FIG. 1A) The "joint tubes" come in various forms. That is, it is a form of one (-), el (L), tee (T), cross (+).

The diameters of the pressure tubes also vary in size. Usually its diameter reaches from 15mm to 3m. Pressure tube is largely divided into synthetic resin tube and ferrous tube and nonferrous metal tube according to the manufactured material. The strength of the pressure in the pressure tube also varies. In the case of water supply, the water pressure usually reaches 10 ~ 30kg / ㎠. In particular, the connection portion between the "joint pipe" and the pressure pipe should be constructed to withstand the strong fluid pressure. Since the pressure tube is operated under high pressure, even a gap as small as a needle hole causes a serious leak (or leakage). Inflammables that are harmful to the human body can be immeasurable. The conventional reinforcement technology for reducing such damage, that is, the conventional reinforcement structure reinforcing the connection portion connecting the "joint pipe" and the pressure pipe is as follows.

First, the reinforcing structure of the Utility Model Registration No. 20-0283812 (hereinafter referred to as 'prior art-1') will be described.

1A and 1B, the joint pipe 100 of the related art-1 is protruded outward from each end to which the pipe 300 is coupled, and the inner diameter surface thereof is bent so that the pipe 300 can be inserted. Is formed. The bent end is formed with the inner bending end 105 and the outer bending end 106 at a right angle to the outside from the inner diameter of the joint pipe (100). One end of the pipe 300 is inserted into the inner bent end 105, and the pressing protrusion 110 is formed continuously in the outer bent end 106 to form a circle. Fitting pipe connection mechanism 200 is largely composed of a sealing material 210, a clip 220 and a cap 230. The sealing material 210 is a rubber material and is a member for watertight purpose. The sealing groove 215 is formed on one side surface of the sealing material 210 to correspond to the pressing protrusion 110. The outer diameter surface of the pipe is inserted into the inner diameter surface of the ring-shaped sealing material 210. The inner surface of the sealing material 210 and the outer surface of the pipe 300 are in close contact with each other to increase watertightness. In a state in which the inner surface of the sealing material 210 and the outer surface of the pipe 300 are in close contact with each other, the clip 220 is provided to be in contact with the sealing material 210. At this time, the saw tooth-shaped rolling prevention means 225 and the pipe 300 formed on the inner diameter surface of the clip 220 is in contact with each other.

The cap 230 is a means for finally binding the joint pipe 100 and the pipe 300 while wrapping the sealing material 210 and the clip 220. As shown in FIG. 1C, the cap 230 separated in a semicircular shape is fastened by a bolt 226 and a fastening hole 227. As described above, 'the prior art-1' is connected to the pipe 100 and the fitting pipe 100 having watertightness by the interaction of the sealing material 210 with the clip 220 and the cap 230. By the way, the connection work is a structure made all outside of the pipe 100. That is, the installation work of the sealing material 210 and the clip 220 is made from the outside, and the fitting pipe 100 and the pipe 300 in a state in which the sealing material 210 and the clip 220 are wrapped by the semi-circular cap 230. ) Is also performed from the outside as well as the fastening of the semi-circular cap 230 by the fastening hole 227) and the bolt 226 is also made from the outside of the fitting pipe (100).

In other words, the structure in which the connection work is performed outside of the fitting pipe 100 has a semicircular cap as a subsequent work even after the pipe 300 is inserted into the fitting pipe 100 through the center of the sealing material 210 and the clip 220. The fastening work of 230 remains. Such a subsequent work has a simple structure, which delays the air of the connection work, thereby making the connection work inefficient and economical, as well as a separate external work space in addition to the excavation space because the fastening work is performed outside the joint pipe 100. There is a problem that becomes necessary.

In addition, since the pipe 300 is inserted into the joint pipe 100, the pipe 300 is not directly fixed to the joint pipe 100, so that another subsequent work must be followed to fix the two touch fixed method. Subsequently, there is a problem that the operation is not easy because the connection operation is not made only once.

Next, the reinforcing structure of Patent No. 10-1166228 (hereinafter referred to as 'prior art-2') will be described.

The rubber packing 30 and the fixing cap 40 are installed on the connection part 20 of the joint pipe of the "conventional technology-2". In this state, the drain pipe 10 is led into the connecting portion 20 of the joint pipe. When the drain pipe 10 is drawn in, the drain pipe 10 has already passed through the central portion of the rubber packing 30 and the fixed cap 40. (See FIGS. 2A, 2B, and 2C.) The insertion into the 20 does not mean that the drain pipe 10 is fixed to the connecting portion 20 immediately. The subsequent work is essential for fixing. This is because the fixing work is an external structure made outside the joint pipe. The problem of the external structure of 'conventional technology-2' in which the fixing work is performed outside of the joint pipe is the same as the problem disclosed in 'conventional technology-1' because it is a two-touch fixing method that is a natural problem of the external structure. .

On the other hand, when the pressure of the pressure pipe is very strong, reinforcement is required between the joint pipe and the drain pipe (10). In the case of external structures such as 'prior art-1' and 'prior art-2', reinforcement is required between the joint pipe and the drain pipe 10. As an example, registered patent No. 10-0775411 (hereinafter referred to as 'prior art-3') has been proposed.

As shown in FIG. 3A, the transfer pipe 10 having the coupling wing support member 26 formed thereon and the transfer pipe 10 face each other to support the transfer structure 10 with the coupling structure 30 and the coupling wing. It is a form firmly fixed by the fastening member 40 inserted and fixed to the fastening hole 261 of the member 26. In other words, it was common to resist and support the pressure of both transfer pipes 10 only with the coupling structure 30, but to support only the coupling structure 30 when the pressure of the transfer pipes 10 increased to high pressure. Lack. In order to reinforce this, the coupling wing support member 26 is integrally formed on both of the conveying pipes 10, and this is to reinforce the insufficient supporting force by supporting it by the fastening member 40 again.

When high pressure is applied to the transfer pipe 10, even if it is preferable to reinforce as in the prior art-3, the reinforcement for fixing the transfer pipe 10 is due to the external structure. If the reinforcement is due to the external structure is not a one touch (one touch) fixing method, such as salpin bar from the above will have the same problems as the inherent problems of the external structure. When the "joint tube" is curved like the L-shape or the T-shape, a higher pressure is applied to the "joint tube" than the one-shape. When a high pressure is applied to the "joint pipe", the high pressure is applied to the assembly unit where the "joint pipe" and the drain pipe are assembled. At this time, when the fixing of the drain pipe to the "joint pipe" by the external structure, the drain pipe is more easily separated from the "joint pipe". This is because the external structure is simply fastened and fixed by bolts to the drain pipe.

In particular, when water (fluid) is first passed through the pressure tube, the pressure from the normal flow of water (fluid) is added to the "joint pipe" in addition to the impact of the water (fluid) at the moment of sudden passage. As the impact energy of the water (fluid) is added, the pressure on the "joint pipe" is maximized. The impact energy of the added water (fluid) not only causes the drain pipe to escape from the "joint pipe" but also causes the problem of leakage.

In addition, since the fastening and fixing of the prior art is made by an external structure, the fastening structure is complicated, and the number of parts (bolts, nuts, flange clamps, welding, etc.) has a problem of increasing the construction period of the pipe joint work.

Since the fastening and fastening of the prior art is dependent on the external structure, the worker has to join and fix the work one by one. Therefore, a separate work space is required, and the excavation space must be excavated much wider than the diameter of the water supply pipe. In addition, workers are required to enter and secure the work space, so industrial accidents due to earth and sand collapse frequently occur.

(a) The present invention provides a 'fixing structure' formed on the pressure tube insertion / adhesion portion (A) and the bushing insertion / adhesion portion (D), a 'double friction resistance structure' by the fastener 20, and watertight rubber. One-touch fastening structure in which an organic fastening structure consisting of a 'watertight structure' by packing is formed inside the pressure pipe connection pipe, and the connection and fixing is completed by only one operation of pushing the pressure pipe into the pressure pipe connection pipe. Purpose is to

(b) The one-touch fastening structure is a structure installed inside the pressure pipe connection pipe, unlike the conventional technology installed on the outside. The structure is simple, and the fastening and fixing with the pressure pipe is secured by the inner and outer elastic protrusions. No leakage occurs and the one-touch jointing and fixing is possible by the operation of the pressure tube inserting equipment, so that the worker does not need to do the jointing work directly. Has a different purpose,

(c) Another purpose is to reduce the air by making the joint and fixing of the fastening structure easy by one-touch method, so that the joint and connection work of the pressure pipe is efficient.

Referring to the configuration of the one-touch three-stage fastening device of the pressure pipe connection pipe of the present invention.

Insertion part S of the pressure pipe connection fitting pipe J into which the pressure pipe 50 is inserted in the pressure pipe joint pipe of the straight, el (L) type, tee (T) type, etc. which has an insertion part into which a pressure pipe is inserted and connected. Consists of a fastener insert / contact part (B), a watertight rubber packing insert / contact part (C), and a bushing insert / contact part (D), starting from the pressure tube insertion / contact part (A). The diameter of S) is formed in a shape that gradually increases toward the outside from the pressure tube insertion / adhesion portion A, while the fastener 20 inserted into the fastener insertion / adhesion portion B and the watertight rubber packing insertion are formed. ㆍ The fastening device 10 is made by the watertight rubber packing 30 inserted into the close contact portion C and the bushing 40 inserted into the bushing insertion / close contact portion D, but the fastener 20 has an inner side. A plurality of elastic protrusions 22a and outer elastic protrusions 22b are formed in a row at regular intervals, respectively, and the inner elastic protrusions 22a are formed. In the pressure tube 50 corresponding to the position, the engaging groove 52 having the inclination angle in the same direction as the inner elastic protrusion 22a is provided, and the fastener inserting / adhering portion corresponding to the position of the outer elastic protrusion 22b ( B) engaging grooves B2 having inclined angles in the same direction as the outer elastic protrusions 22b are formed, respectively, but the engaging grooves 52 of the pressure tube 50 have a shape that does not interfere with the insertion of the pressure tube 50. It has a shape that resists the detachment of the pressure tube 50 when the fluid pressure is applied, and the locking groove B2 of the fastener insertion / adhesion part B is connected to the fastener insertion / adhesion part B by the fastener 20. It has a shape that does not interfere with the insertion of the pressure gauge and resists the detachment of the pressure pipe (J) for connecting the pressure pipe when the fluid pressure is applied. Double friction formed by inserting the inner elastic protrusion 22a and the outer elastic protrusion 22b into the locking groove B2 of (B), respectively. A pressure tube joints 3-one-touch fastening device for connecting a pipe, characterized in that the resistance to the detachment of the pressure tube 50, pursuant to the port.

In addition, the inclination angle θ of the inner elastic projection 22a and the outer elastic projection 22b, and the inclination angle θ of the locking groove B2 of the pressure pipe 50 and the locking groove B2 of the fastener insertion / adherence portion B are determined. It is the same formation.

The shape of the locking groove 52 of the pressure pipe 50 and the locking groove B2 of the fastener insertion / contacting portion B is a right triangle shape having an inclination angle θ. As shown in Fig. 7, the locking groove 52 and the locking groove B2 are formed in opposite directions with respect to the vertical line of the right triangle.

In addition, the fastener 20 is made of stainless steel having an elastic material, and the inner elastic protrusion 22a and the outer elastic protrusion 22b are integrally formed by punching the fastener 20, but the inner elastic protrusion 22a and the outer elastic protrusion 22 are integrally formed. It is the structure which made the inclination-angle (theta) of 22b become 15-30 degrees.

The inner elastic protrusions 22a and the outer elastic protrusions 22b have a rectangular or trapezoidal shape, and the locking grooves of the pressure pipe 50 formed at positions corresponding to the inner elastic protrusions 22a and the outer elastic protrusions 22b ( 52) and the inclination-angle (theta) of the engaging groove B2 of the fastener insertion / adherence part B is preferable 15-30 degrees.

The inner elastic protrusion part 22a and the outer elastic protrusion part 22b protrude from both ends with the punching part 226 interposed therebetween, but share the punching part 226 with each other but do not interfere with elastic shrinkage at all.

On both side portions 222 of the inner elastic protrusion 22a and the outer elastic protrusion 22b, the anti-shaft reinforcing portion 222a inclined in the opposite direction of the pressure tube 50 inserted is formed in the longitudinal direction.

At the centers of the inner elastic protrusion 22a and the outer elastic protrusion 22b, the V-shaped anti-shaft reinforcing portion 224 having a V-shaped vertex located at the pressure tube 50 is formed.

The pressure pipe connection joint pipe J of this invention is a joint pipe which connects and connects the pressure pipe 50. As shown in FIG. Here, the pressure pipe 50 includes both steel pipes such as iron and nonferrous metals, and synthetic resin pipes. Since the connection pipe J for the pressure pipe is a member under strong pressure, a solid material such as iron and nonferrous metal is preferable.

However, the size of the pressure pipe 50 inserted into the 'pressure pipe connecting pipe (J)' varies. Usually, the diameter of the pressure tube 50 is wide to 15-3000 mm. The strength of the hydraulic pressure also varies according to the size of the diameter, so synthetic resin (PE, PP, PVC, etc.) is also useful as a material for the connection pipe (J).

The pressure pipe 50 is inserted and fixed through the insertion portion S of the "pressure pipe connecting pipe J". The order in which the pressure pipe 50 is inserted into the insertion part S is as follows: bushing insertion / adhesion part D → watertight rubber packing insertion / adherence part C → fastening hole insertion / adhesive part B → pressure tube insertion / adherence (A) order.

The bushing 40 is attached to the bushing insertion / adhesive part D, the watertight rubber packing 30 is attached to the watertight rubber packing insertion / adhesive part C, and the fastener 20 is attached to the fastener insertion / adhesive part B. ) Is attached and fixed.

The pressure pipe 50 is a structure which penetrates the bushing 40 → watertight rubber packing 30 → fastening opening 20. As shown in FIG.

Next, the function and role of the pressure tube inserting / adhering portion A, the fastener 20, the watertight rubber packing 30, and the bushing 40 in relation to the pressure tube 50 will be described.

First, the function of the pressure tube insertion / adherence part (A) will be described.

The pressure tube insertion / adhesion portion A serves to tightly fix and fix one end of the pressure tube 50. In order to prevent horizontal rolling or vertical flow of the pressure pipe 50 due to external factors such as earthquakes or internal factors such as water pressure. The fixing of the pressure tube insertion / adhesion portion A forms a balanced “fixed structure” with the fixing of the bushing insertion / adhesion portion D by the bushing 40 symmetrical thereto. 'Fixed structure' is a structure that suppresses horizontal sliding and vertical flow of the pressure pipe (50).

The pressure tube insertion / adhesion portion A is fixed by making the outer diameter of the pressure tube 50 closely contact the inner diameter of the pressure tube insertion / adhesion portion A. FIG.

The inner diameter of the pressure tube insertion / adhesion part A is the same size as the outer diameter of the pressure tube 50, while the step of the pressure tube insertion / adhesion part A is equal to the thickness t of the pressure tube 50.

However, if the inner diameter of the pressure tube insertion / adhesion part A and the outer diameter of the pressure tube 50 are the same, the pressure tube 50 cannot be inserted. Here, the same size means that the pressure tube 50 includes a minimum amount of space enough to be inserted.

Second, look at the structure of the fastener 20 is inserted into the fastener insertion and contact portion (B) and its role and function.

The fastener 20 is inserted into the fastener insertion / adherence portion B, and the pressure tube 50 penetrates the fastener 20.

More specifically, the outer diameter of the fastener 20 is in close contact with the inner diameter of the fastener insertion / adherence portion B, and the outer diameter of the pressure tube 50 is inserted into the inner diameter of the fastener 20. to be.

The fastener 20 is made of a metal material such as stainless steel having elasticity. The shape of the fastener 20 is a circular ring shape having a constant width. In the circular ring of the fastener 20, a plurality of inner elastic protrusions 22a and outer elastic protrusions 22b are formed in a row at regular intervals, respectively. The inner elastic protrusion 22a and the outer elastic protrusion 22b are integrally formed while being punched by the fastener 20 and having a protruding inclination angle.

The inner elastic protrusion 22a and the outer elastic protrusion 22b are inclined in opposite directions to each other. The magnitude of the inclination angle θ is the same. The inclination angle θ is preferably 15 to 30 degrees based on the horizontal plane. The inclination of the inner elastic protrusion 22a is inclined in the direction toward the pressure tube 50 while the pressure tube 50 is inserted, and the inclination of the outer elastic protrusion 22b is the fastener insertion / adherence portion B. FIG. It is inclined in a direction opposite to the direction in which the pressure tube 50 is inserted while being outward.

The inner elastic protrusion 22a and the outer elastic protrusion 22b may be arranged in various forms on the ring of the fastener 20. For example, the inner elastic projections 22a and the outer elastic projections 22b may be alternately arranged one row on the ring of the fastener 20, as shown in FIG. 4 (a), and FIG. 4 (b). As described above, a plurality of rows may be arranged in a state where the inner elastic protrusions 22a and the outer elastic protrusions 22b face each other. The elasticity, contraction, elasticity, and restoration (expansion) of the elastic protrusions 22 are rapidly performed at the inclination angle θ 15 to 30 degrees, and the pressure tube 50 of the elastic protrusions 22 at the inclination angle θ 15 to 30 degrees. This is because the frictional resistance strength against is the largest. At this time, when the inclination angle θ is smaller than 15 °, the frictional resistance is reduced, and when it is larger than 30 °, the frictional resistance is easily reversed and the frictional resistance is reduced.

In addition, in order to further increase the frictional resistance strength against the pressure tube 50, both side portions 222 of the elastic protrusion 22 has an anti-shaft reinforcing portion 222a inclined in the opposite direction of the inserted pressure tube 50, and At the center of the elastic protrusion 22, a V-shaped anti-shaft reinforcing portion 224 having a V-shaped vertex located at the pressure tube 50 side is formed in the longitudinal direction.

The anti-shaft reinforcing portion 222a and the V-shaped anti-shaping reinforcing portion 224 not only prevent the back of the frictional resistance but also function to greatly increase the frictional resistance supporting strength.

The shape of the elastic protrusion 22 is preferably a rectangular or trapezoidal shape with a large tip contact portion of the elastic protrusion 22. This is because the frictional resistance by the tip contact portion of the elastic protrusion 22 is increased, because the main function of the elastic protrusion 22 is provided. However, the shape of the elastic protrusion 22 is not limited to the rectangular or trapezoidal shape. It goes without saying that any shape of the front-facing contact portion of the elastic protrusion 22 is included in the rectangular or trapezoidal shape.

Now, the frictional resistance structure of the inclined inclination direction of the inner elastic projection 22a and the outer elastic projection 22b and the locking grooves 52 (B2) of the pressure pipe 50 and the fastener insertion / adherence portion B is now achieved. Looking at the following.

First, the frictional resistance structure of the inner elastic protrusion part 22a and the locking groove 52 of the pressure tube 50 will be described.

The inclination of the inner elastic projection 22a is inclined in the direction in which the pressure tube 50 is inserted while being inward of the pressure tube 50. Since the inner elastic projection 22a is inclined in the direction in which the pressure tube 50 is inserted, the insertion of the pressure tube 50 is not hindered at all. In other words, when the pressure tube 50 is inserted into the inner diameter of the fastener 20, the inner elastic protrusion 22a, which is in contact with the outer circumferential surface of the pressure tube 50, is pushed toward the punching portion 226 while being pushed against the outer circumferential surface of the pressure tube 50. Elasticity and shrinkage. The elasticity and contraction of the inner elastic projection 22a allows the pressure tube 50 to be inserted smoothly without being disturbed.

A locking groove 52 is formed at a position corresponding to the inner elastic protrusion 22a on the outer circumferential surface of the pressure tube 50. The state in which the inner elastic protrusion part 22a is inserted into the locking groove 52 of the pressure tube 50 is a state in which the insertion of the pressure tube 50 is completed. In this state, when the force that separates the pressure tube 50 in the opposite direction as the insertion is applied, the inner elastic protrusion 22a becomes a frictional resistance structure with respect to the locking groove 52 of the pressure tube 50. The frictional resistance structure is the opposite of that of the insertion of the pressure tube 50.

Even when the inner elastic protrusion 22a is elastically contracted by the outer circumferential surface of the pressure tube 50, when the force in the opposite direction to separate the pressure tube 50 is applied, the elastic inner contracted inner elastic protrusion 22a is the original protrusion. The restoring force to recover and expand in the oblique direction is exerted. The strong frictional resistance structure is achieved by the interaction between the restoring force of the inner elastic projection 22a and the locking groove 52 of the pressure tube 50.

The inner elastic protruding portion 22a is a structure that elastically contracts and contracts with respect to the insertion direction of the pressure tube 50, and has a frictional resistance structure that exhibits elastic restoring force in the separation and disengagement direction of the pressure tube 50.

In the frictional resistance structure, the greater the number of elastic protrusions 22, the greater the frictional resistance.

The number of elastic protrusions 22 formed in the circular fastener 20 is a design matter determined according to the diameter of the pressure tube 50.

A plurality of rows are formed at regular intervals while forming a plurality of rows.

Next, the frictional resistance structure by the locking groove B2 of the outer elastic protrusion part 22b and the fastener insertion / adherence part B will be described.

The fastener inserting / contacting portion B corresponding to the position of the outer elastic protrusion 22b is formed with a locking groove B2 having an inclination angle in the same direction as the outer elastic protrusion 22b.

The outer elastic protruding portion 22b is smoothly inserted into the locking groove B2 of the fastener inserting / contacting portion B by the inclination angle in the same direction.

The friction resistance structure of the outer elastic protrusion part 22b and the engaging groove B2 of the fastener insertion / adherence part B will be described with reference to FIG.

Water flows from (a) to (b). In Fig. 8B, the outer elastic protruding portion 22b is inclined in the water flow direction and inserted into the fastener inserting / contacting portion B. Figs.

In the case of (b), the 'pressure pipe connecting pipe (J)' is in a fixed state, and the pressure pipe 50b is viewed from the viewpoint of relatively deviating in the direction of water flow. This is because the phenomenon occurs in the pressure pipe connecting pipe (J) and the pressure pipe 50b.

In the case of (b), the inner elastic protrusion part 22a and the pressure tube 50b form a frictional resistance structure. That is, when the pressure tube 50b is to be separated by the hydraulic pressure, the inner elastic protrusion part 22a has a frictional resistance against the locking groove 52 of the pressure tube 50.

When the hydraulic pressure acting on the pressure tube 50b becomes large, the frictional resistance caused by the locking groove 52 and the inner elastic protrusion 22a of the pressure tube 50b eventually becomes an integrally formed integrally formed of the inner elastic protrusion 22a and the outer elastic protrusion 22b. It acts on the sphere 20 so that the fastener 20 is separated in the flow direction of the water. In order to reinforce this, the outer elastic protrusion 22b and the locking groove B2 form a frictional resistance structure so that the inner elastic protrusion 22a and the pressure tube 50b may be resistant to strong hydraulic pressure.

On the other hand, in the case of (a), the pressure pipe 50a is in a fixed state, and the "pressure pipe connecting pipe J" is viewed from the perspective of being relatively separated from the flow direction of water. In the case of (a), the friction groove structure is formed by the locking groove 52 and the inner elastic projection 22a of the pressure pipe 50. That is, when the "pressure pipe connecting pipe (J)" is to be separated by the hydraulic pressure, the inner elastic projection 22a against the locking groove 52 of the pressure pipe 50 is a structure that is frictional resistance.

When the water pressure acting on the pressure pipe connecting joint J becomes large, the frictional resistance caused by the locking groove 52 and the inner elastic protrusion 22a of the pressure tube 50a eventually becomes the inner elastic protrusion 22a and the outer elastic protrusion. 22b acts on the fastener 20 formed integrally to allow the fastener 20 to be separated in the flow direction of the water. In order to reinforce this, the outer elastic protrusion 22b and the locking groove B2 form a frictional resistance structure so that the inner elastic protrusion 22a and the pressure tube 50b may be resistant to strong hydraulic pressure.

Third, the role and function of the watertight rubber packing 30 inserted into the watertight rubber packing insertion / adhesive part C will be described.

The watertight rubber packing 30 is in close contact with the watertight rubber packing insertion / adhesion part C. FIG.

The outer diameter of the watertight rubber packing 30 is in close contact with the inner diameter of the watertight rubber packing insert / adhesive part C, and the inner diameter of the watertight rubber packing 30 is in close contact with the outer diameter of the pressure tube 50. Watertight rubber packing 30 serves to prevent leakage. The watertight rubber packing 30 uses the structure and shape used conventionally as it is.

However, one-touch connection is achieved by forming a structure in which the fastener inserting / adhering portion B is formed inside the watertight rubber packing inserting / adhering portion C, and the bushing inserting / adhering portion D is formed therein. It is very different from the structure of the prior art in that the fixing is possible.

The upper projection 32 of the watertight rubber packing 30 is inserted into and fixed to the semicircular projection C1 of the watertight rubber packing insertion / adhesion portion C. As shown in FIG.

The lower horizontal protrusion 34 of the watertight rubber packing 30 extends and is installed to the bottom of the fastener 20.

Fourth, the role and function of the bushing 40 inserted into the bushing insertion / adherence part D will be described.

The bushing 40 is in close contact with and fixed to the bushing insertion / adhesion part D.

The shape of the bushing 40 consists of a vertical insertion barrier 42 and a horizontal outer diameter 44 and an inner diameter 46.

The outer diameter 44 of the bushing 40 comes into close contact with the inner diameter of the bushing insert / adhesion portion D, while the inner diameter 46 of the bushing 40 comes into close contact with the outer diameter of the pressure tube 50.

The bushing 40 is a member inserted into a gap gap between the inner diameter of the bushing insertion / adhesion part D and the outer diameter of the pressure pipe 50 to firmly fix the pressure pipe 50 to the bushing insertion / adhesion part D. FIG.

As for the material of the bushing 40, it is preferable to use the same material as that of the "pressure pipe connecting pipe (J)". This is to further strengthen the fixing force of the bushing insertion / adhesion section D by inserting the bushing 40.

There are two places where the pressure pipe 50 inserted in the pressure pipe connection pipe J is fixed. The two are symmetrical with each other. The pressure pipe 50 forms a stable “fixed structure” by fixing two positions symmetrically.

One fixing is the fixing of the bushing insertion / adhesion part D by the bushing 40, and the other fixing is the fixing of the pressure tube insertion / adhering part A.

When the 'fixing structure' of the pressure pipe 50 is stabilized first, the frictional resistance structure by the fastener 20 is stabilized, and the watertight structure by the watertight rubber packing 30 is stabilized.

The pressure pipe 50 is assembled to the 'pressure pipe connecting pipe (J)' is a place where a strong hydraulic pressure is applied.

Strong water pressure is ① pressure pipe (50) or 'pressure pipe connecting pipe (J)' is released in the direction of the hydraulic pressure, and ② generates vibration to pressure pipe (50) or 'pressure pipe connecting pipe (J)' It will increase the deviation of.

The pressure pipe connection joint pipe J and the pressure pipe 50 have a relative relationship. That is, from the viewpoint of fixing the 'pressure pipe connecting pipe (J)', the pressure pipe 50 is relatively separated by the hydraulic pressure. On the contrary, from the viewpoint that the pressure pipe 50 is fixed, the 'pressure pipe connection pipe J' is relatively separated. This is exactly what is happening.

The pressure pipe connection joint pipe J has a stable 'fixed structure' by the pressure pipe insertion / adhesion portion A and the bushing insertion / adhesion portion D, the inner elastic protrusion 22a and the outer elastic protrusion 22b. It is an organic resistance structure composed of double frictional resistance structure by) and watertight structure by watertight rubber packing. The organic resistance structure suppresses and resists separation and vibration of the pressure tube 50. In particular, the “fixed structure” of the pressure tube 50 is a basic structure that is a premise of the double frictional resistance structure and the watertight structure.

This is because the “fixing structure” of the pressure pipe 50 must be stabilized so that the separation prevention function due to the frictional resistance structure and the watertight function due to the watertight structure can be properly exhibited.

Earthquakes are the biggest source of vibration. In addition, rapid changes in fluid flow are factors that increase vibration and water pressure. The sudden change in fluid flow is, for example, when a sudden sudden curve section is encountered in a straight section. This includes the case where a sudden curved joint such as an L (L) shape or a tee (T) shape is encountered, and a case where the impact energy of water is generated due to sudden water flow.

Now, the basic concept of the one-touch three-stage fastening of the present invention based on the above description will be described.

The invention 'joint pipe (J) for pressure pipe connection' is an organic resistance structure formed by a fixed structure, a double frictional resistance structure, and a watertight structure.

The basic concept of the one-touch three-stage fastening is a one-touch method in which the joint of the pressure pipe 50 is completed by simply pushing the pressure pipe 50 into the 'pressure pipe connection pipe J' in which the organic resistance structure is formed.

In the three-stage fastening, the first stage refers to the bushing insert, the contact portion (D) and the watertight rubber packing insert, the contact portion (C), the second stage refers to the fastener insert, the contact portion (B), and the third stage to the pressure tube insertion A contact part A is called.

One-touch method is easy to connect and fix on site. This is because the fitting of the pressure pipe 50 is completed by simply pushing the pressure pipe 50 into the pressure pipe connecting fitting pipe J in which the organic resistance structure is formed.

(a) The present invention is a structure in which the fixed structure, the double frictional resistance structure, and the organic resistance structure by the watertight structure are formed inside the pressure pipe connection pipe, so that only the pressure pipe is pushed into the pressure pipe connection pipe. One-touch joints and fixings are completed with only the operation of, so that not only the joints and connection work is easy but also the air is shortened, so the work is efficient and economical.

(b) The one-touch double organic frictional resistance structure, unlike the conventional technology installed on the outside, is a structure installed inside the pressure pipe connection pipe, and its structure is simple and the fastening with the pressure pipe securely causes leakage. At the same time, one-touch jointing and fixing is possible by the pressure tube inserting equipment. Therefore, the operator does not need to directly join the joint. Therefore, no additional working excavation space is required, so the excavation work is efficient and economical. It is possible to work with equipment without going into the equipment, and thus it is effective to prevent industrial accidents due to soil disintegration.

(c) Since it is a simple fastening structure by one-touch method, it is a useful invention with the effect that the joint and work of the pressure pipe are easy, so that the joint and work are efficient and the working period is shortened.

Figure 1a is a schematic cross-sectional view of the joint pipe of the prior art-1

Figure 1b is a cross-sectional view showing a state in which the connection mechanism of the external structure is fastened to the joint pipe of the prior art-1

Figure 1c is an exploded perspective view of the clip of the prior art-1

Figure 2a is a perspective view showing a joint pipe for connecting the 'T'-shaped drain pipe of the prior art-2

Figure 2b is an exploded view showing a cross-sectional state of the joint pipe for connecting the 'T'-shaped drain pipe of the prior art-2

Figure 2c is a state diagram in which the drain pipe is connected to the 'T'-shaped drain pipe connection pipe of the prior art-2

Figure 3a is an exploded cross-sectional view showing a state in which the coupling structure is coupled to the transfer pipe coupling structure of the prior art-3

3b is a coupling state diagram showing a state in which the coupling structure is coupled to the transfer pipe coupling structure of the prior art-3;

Figure 4 is an exploded perspective view of the one-touch three-stage fastening device of the pressure pipe connection pipe of the present invention

Fig. 5 A-A cross sectional view of Fig. 4

6 is a perspective view of a fastener of the pressure pipe connection pipe of the present invention

7 is a cross sectional view of FIG.

8 is a cross-sectional view for explaining the basic concept of the present invention one-touch three-stage fastening

The construction method of the pressure pipe using the one-touch three-stage fastening device of the pressure pipe connection pipe of the present invention will be described in detail with the accompanying drawings.

(a) Excavation of the basement by an open cut method for installing the pressure tube 50, but unlike the conventional, without digging a separate working space, the pressure tube 50 so as to have a minimum space that can be installed Excavating the basement in the longitudinal direction of the;

(b) Fastener inserting / adhering portion (B) formed with a plurality of catching grooves (B2) having inclined angles in the same direction as the outer elastic protrusion portion (22b), starting from the pressure tube inserting / adhering portion (A), watertight rubber packing Inner elastic projection 22a having an inclination angle θ of 15 to 30 ° in the insertion portion S of the pressure pipe connection fitting pipe J including the insertion / adhesion portion C and the bushing insertion / adhesion portion D. ) And the outer elastic protrusions 22b are formed at a predetermined interval, and a plurality of fasteners 20, watertight rubber packings 30, and bushings 40 are formed in a plurality of pressure pipes. Inserted into and fixed to the left and right insertion portions SL (SR) of J1, J2,... Jn, the outer elastic projection 22b of the fastener 20, and the corresponding fastener insertion / adhesive portion ( Manufacturing a plurality of pressure pipe connecting joint pipes J1, J2, ... Jn in which a frictional resistance structure is formed by the right angled triangular groove B2 of B);

(c) a plurality of right triangular triangular grooves having an inclination angle in the same direction as the insertion part SR of the pressure pipe connection joint J1 manufactured in step (b) and the inner elastic protrusion part 22a ( 52) the end portions L of the pressure pipe K1 formed are placed in a state of facing each other, and in this state, the end L of the pressure pipe K1 is inserted into the insertion portion SR of the pressure pipe connecting joint J1 by the pressure pipe insertion equipment. Pushing the inner elastic projections (22a) into the plurality of locking grooves (52) formed at the end (L) side of the pressure pipe (K1) to be elastically inserted and fixed;

(d) Insert and connect the insertion part SL of the new pressure pipe connecting pipe J2 already prepared in the step (b) to the end R of the pressure pipe K1 of the step (c), but the pressure pipe connecting pipe Elastically inserting and fixing the inner elastic protruding portion 22a provided in the insertion portion SL of the J2 into a plurality of right-angled triangular-shaped locking grooves 52 formed on the end portion R of the pressure tube K1;

(e) The insertion part SR of the pressure pipe connecting joint J2 of step (d) and the end portion L of the new pressure pipe K2 in which the plurality of locking grooves 52 are formed are placed to face each other, and in this state. At the end of the pressure pipe (2) of the pressure pipe (K2) by the pressure pipe inserting device into the insertion portion (SR) of the joint pipe J2 for connecting the pressure pipe, but the plurality of engaging grooves 52 formed on the end (L) side of the pressure pipe (K2) Elastically inserting and fixing the inner elastic protrusion part 22a of the mold;

(f) Insert and connect the insertion part SL of the new pressure pipe connecting joint J3 already assembled in the step (b) to the end R of the pressure pipe K2 of the step (e), and the step (d) Inserting and fixing by the same method as described above;

(g) sequentially connecting and connecting the pressure pipe connecting joints J4, J5, ... Jn and the pressure pipes K3, K4, ... Kn while repeating the steps (c) to (f); It is a method of constructing a pressure pipe using a one-touch three-stage fastening device of the pressure pipe connection pipe characterized in that it comprises a.

Here, the joint pipes J1, J2, ... Jn for pressure pipe connection show the joint sequence of the joint pipe J for pressure pipe connection for convenience of description, and the corresponding pressure pipes K1, K2, ... Kn are pressure pipe connection. The insertion and joint procedures of the straight pressure pipe 50 are shown in the joint pipes J1, J2, ..., Jn.

(L) of the pressure pipe K refers to the end part of the left pressure pipe connected with the pressure pipe connection joint pipe J for convenience of description, and (R) of the pressure pipe K says the end of the right pressure pipe jointed with the connection pipe J for pressure pipe connection. . SR means that the connecting pipe (J) insertion portion (S) for the pressure pipe connection is located on the right side, SL means that the fitting pipe (J) insertion (S) for the pressure pipe connection is located on the left side.

In addition, the fastener 20 of step (b) is made of stainless steel having an elastic material, and the inner elastic protrusion 22a and the outer elastic protrusion 22b are integrally formed by punching the fastener 20, but the inner elastic protrusion is The pressure pipe 50 having a right angle triangular shape formed at a position corresponding to the inner elastic protrusion 22a and the outer elastic protrusion 22b while the shapes of the 22a and the outer elastic protrusion 22b are rectangular or trapezoidal. The inclination angle θ of the locking groove 52 of the locking groove 52 and the locking groove B2 of the fastener insertion / contacting portion B is 15 to 30 °, and the inclination angle θ is opposite to each other based on a vertical line of a right triangle. It is a pressure pipe construction method using the one-touch three-stage fastening device of the pressure pipe connection pipe characterized in that formed.

In addition, on both sides 222 of the elastic protrusion 22, the anti-tip reinforcement portion 222a inclined toward the pressure tube 50, and the V-shaped vertex is located at the pressure tube 50 side in the central portion of the elastic protrusion 22. The V-shape prevention reinforcing portion 224 is a method of constructing a pressure pipe using a one-touch three-stage fastening device of the pressure pipe connection pipe, characterized in that formed in the longitudinal direction.

In addition, on both side portions 222 of the elastic projection 22, the anti-tilt reinforcing portion 222a inclined in the opposite direction of the pressure tube 50 inserted, and the V-shaped vertex at the central portion of the elastic projection 22 It is a construction method of the pressure tube using the one-touch three-stage fastening device of the joint pipe for pressure pipe connection, characterized in that the V-shape prevention reinforcing portion 224 positioned on the pressure pipe 50 is formed in the longitudinal direction.

In addition, the inner elastic protrusion 22a and the outer elastic protrusion 22b have a structure in which the punching portions 226 are shared with each other while protruding from both ends with the punching portion 226 interposed therebetween, but not at all interfering with elastic shrinkage. It is a method of constructing a pressure pipe using a one-touch three-stage fastening device for a pressure pipe connection pipe.

In this way, by making a fixed structure, a double frictional resistance structure, and a watertight structure, a joint pipe (J) for connecting pressure tubes is manufactured, and then transported to an excavated site for connection and jointing. 'Make the pressure pipe 50 to the insertion part (S) of the pressure pipe connecting joint pipe (J), and in this state by using the pressure pipe inserting equipment to push the pressure pipe 50 into the' pressure pipe connecting pipe (J). In this way, the joint fixing of the pressure pipe 50 is completed by the one-touch method.

Conventional technology in which the fastening fixing is installed outside has a complicated fastening structure as well as a large number of parts (bolts, nuts, flange clamps, welding, etc.), and thus requires a lot of work time. By simple, one-touch joint fixing is possible.

The present invention is a useful invention that does not require the excavation of a separate working space, unlike the prior art, and because the joint fixing is a one-touch method by the equipment, the operator does not need to enter the working space, so that industrial accidents due to earth and earth collapse do not occur.

Claims

In pressure pipe fittings such as straight, el (L), and tee (T) types, each having an insertion portion into which a pressure tube is inserted and connected.

The inserting portion S of the pressure pipe connecting fitting pipe J into which the pressure pipe 50 is inserted is sequentially fastened by inserting the fastener, sealing the watertight rubber packing, inserting the bushing, and contacting with the pressure pipe inserting and contacting portion A. D), the diameter of the insertion portion (S) is formed in a shape that gradually increases toward the outside from the pressure tube insertion and contact portion (A), while the fastener inserted into the fastener insertion and contact portion (B) (20), the watertight rubber packing inserting and contacting portion (C) is inserted into the fastening device 10 by the watertight rubber packing (30) and the bushing 40 is inserted into the bushing inserting and contacting (D). However, the fastener 20 has a plurality of inner elastic protrusions 22a and outer elastic protrusions 22b formed in a row at regular intervals, respectively, and the pressure tube corresponding to the position of the inner elastic protrusions 22a ( 50, the locking groove 52 having an inclination angle in the same direction as the inner elastic projection 22a, and the outer elastic stone In the fastener insertion / adhesion portion B corresponding to the position of the outlet portion 22b, a locking groove B2 having an inclination angle in the same direction as the outer elastic protrusion 22b is formed, respectively, but the locking groove of the pressure pipe 50 is formed. (52) has a shape that does not interfere with the insertion of the pressure tube 50, and has a right triangle shape that resists the detachment of the pressure tube 50 when the fluid pressure is applied, the fastener insertion and the contact portion (B) The locking groove B2 has a shape that does not interfere when the fastener 20 is inserted into the fastener insertion / adhesive portion B, and resists the detachment of the pressure pipe connection joint pipe J when the fluid pressure is applied. It has a right triangle shape, and the inner elastic protrusion part 22a and the outer elastic protrusion part 22b are respectively inserted in the locking groove 52 of the pressure pipe 50, and the locking groove B2 of the fastener insertion / adherence part B, respectively. One-touch three-stage fastening device of the pressure pipe connection pipe, characterized in that the resistance to the separation of the pressure pipe 50 while forming a double frictional resistance structure
The method of claim 1

The inclination angle θ of the inner elastic projection 22a and the outer elastic projection 22b and the inclination angle θ of the locking groove 52 of the pressure pipe 50 and the locking groove B2 of the fastener insertion / adherence portion B are equal. One-touch three-stage fastening device of the pressure pipe connection pipe characterized in that the forming
The method according to claim 1 or 2

The fastener 20 is made of stainless steel having an elastic material, and the inner elastic protrusion 22a and the outer elastic protrusion 22b are integrally formed by punching the fastener 20, but the inner elastic protrusion 22a and the outer elastic protrusion ( 22b) one-touch three-stage fastening device of the pressure pipe connection pipe, characterized in that the inclination angle (θ) is 15 ~ 30 °
The method according to claim 1 or 2

The inner elastic protrusions 22a and the outer elastic protrusions 22b have a rectangular or trapezoidal shape, and the locking grooves of the pressure pipe 50 formed at positions corresponding to the inner elastic protrusions 22a and the outer elastic protrusions 22b ( 52) and the inclination angle θ of the locking groove B2 of the fastener insertion / contacting portion B to be 15 to 30 °, and the locking groove 52 of the pressure tube 50 having a right triangle shape; One-touch 3-step fastening of the pressure pipe connection joint, characterized in that the inclination angle θ of the locking groove B2 of the fastener insertion / contacting portion B is formed in the opposite direction with respect to the vertical line of the right triangle. Device
The method of claim 4

The inner elastic protrusion 22a and the outer elastic protrusion 22b have a structure in which the punching portions 226 are shared with each other while protruding from both ends with the punching portion 226 interposed therebetween, but not at all interfered with elastic shrinkage. Touch three-stage fastening device for connecting pipe for pressure pipe
The method of claim 2

On both side portions 222 of the inner elastic protrusion 22a and the outer elastic protrusion 22b, an anti-shaft reinforcing portion 222a inclined in a direction opposite to the inserted pressure tube 50 is formed in the longitudinal direction. One-touch 3-speed fastening device for joint pipe for pressure pipe
The method of claim 6

Joints for connecting pressure pipes, characterized in that the V-shaped interlocking reinforcing reinforcing portion 224 is formed at the center of the inner elastic protrusions 22a and the outer elastic protrusions 22b at the V-shaped vertices. One-touch 3-step fastening device for pipe
(a) Excavation of the basement by an open cut method for installing the pressure tube 50, but unlike the conventional, without digging a separate working space, the pressure tube 50 so as to have a minimum space that can be installed Excavating the basement in the longitudinal direction of c);

(b) Fastener inserting / adhering portion (B) formed with a plurality of catching grooves (B2) having inclined angles in the same direction as the outer elastic protrusion portion (22b), starting from the pressure tube inserting / adhering portion (A), watertight rubber packing A fastener 20, a watertight rubber packing 30, and an insertion portion S of the pressure pipe connecting fitting pipe J, which is composed of an insertion / adhesion portion C and a bushing insertion / adhesion portion D. Inserting and fixing the bushing 40 in sequence, but a fastener in which a plurality of inner elastic protrusions 22a and outer elastic protrusions 22b having an inclination angle θ of 15 to 30 ° are formed at regular intervals, respectively, in a plurality of fasteners ( Insertion and fixing of 20) causes the outer elastic projection 22b to be elastically inserted and fixed in the right angle triangular-shaped locking groove B2 of the fastener inserting / contacting portion B corresponding thereto. Assembling and installing a resistance structure which resists the detachment of the pressure tube 50 during the action at the joints J1, J2, J3, ... Jn of the pressure tube;

(c) a plurality of right triangular triangular grooves having an inclination angle in the same direction as the insertion part SR of the pressure pipe connection joint J1 manufactured in step (b) and the inner elastic protrusion part 22a ( 52) the end portions L of the pressure pipe K1 formed are placed in a state of facing each other, and in this state, the end L of the pressure pipe K1 is inserted into the insertion portion SR of the pressure pipe connecting joint J1 by the pressure pipe insertion equipment. Pushing the inner elastic projections (22a) into the plurality of locking grooves (52) formed at the end (L) side of the pressure pipe (K1) to be elastically inserted and fixed;

(d) Insert and connect the insertion part SL of the new pressure pipe connecting pipe J2 already assembled in the step (b) to the end R of the pressure pipe K1 of the step (c), but the pressure pipe connecting pipe Elastically inserting and fixing the inner elastic protruding portion 22a provided in the insertion portion SL of the J2 into a plurality of right angle triangular engaging grooves 52 formed on the end portion R of the pressure tube K1;

(e) The insertion part SR of the pressure pipe connecting joint J2 of step (d) and the end portion L of the new pressure pipe K2 in which the plurality of locking grooves 52 are formed are placed to face each other, and in this state. At the end of the pressure pipe (2) of the pressure pipe (K2) by the pressure pipe inserting device into the insertion portion (SR) of the joint pipe J2 for connecting the pressure pipe, but the plurality of engaging grooves 52 formed on the end (L) side of the pressure pipe (K2) Elastically inserting and fixing the inner elastic protrusion part 22a of the mold;

(f) Insert and connect the insertion part SL of the new pressure pipe connecting joint J3 already assembled in the step (b) to the end R of the pressure pipe K2 of the step (e), and the step (d) Inserting and fixing by the same method as described above;

(g) sequentially connecting and connecting the pressure pipe connecting pipes J4, J5, ... Jn and the pressure pipes K3, K4, ... Kn while repeating the steps (c) to (f). Construction method of pressure pipe using one-touch three-stage fastening device of pressure pipe connection pipe
The method of claim 8

The fastener 20 of step (b) is made of stainless steel having an elastic material, and the inner elastic protrusion part 22a and the outer elastic protrusion part 22b are integrally formed by punching the fastener 20, but the inner elastic protrusion part ( 22a) and the outer elastic protrusion 22b have a rectangular or trapezoidal shape, while the pressure tube 50 has a right triangle shape formed at a position corresponding to the inner elastic protrusion 22a and the outer elastic protrusion 22b. The inclination angle θ of the locking groove 52 and the locking groove B2 of the fastener insertion / contacting portion B is 15 to 30 °, and the inclination angle θ is opposite to each other based on a vertical line of a right triangle. Construction method of pressure pipe using one-touch three-stage fastening device of pressure pipe connection pipe characterized in that it is formed
The method according to claim 8 or 9

The inner elastic protrusion 22a and the outer elastic protrusion 22b have a structure in which the punching portions 226 are shared with each other while protruding from both ends with the punching portion 226 interposed therebetween, but not at all interfered with elastic shrinkage. Construction method of pressure tube using one-touch three-stage fastening device of pressure pipe connection pipe