KR200410503Y1 - Connection structure of P.E and F.R.P pipe - Google Patents

Abstract

The present invention is to form a concave groove in the outer periphery of the end of the tube made of polyethylene and fiber-reinforced plastic material, and to form a joint protrusion in the inner periphery of the coupling made of urethane material to press the end of the tube into the inner side of the coupling In addition to the conventional pipe joint structure in which the helical joint protrusion and the helical recess groove are helically coupled to couple the coupling and the tubular body by rotating the tubular body or the coupling slightly, the lock nut and the packing are interposed between the tubular body and the coupling part. It relates to the joint structure of polyethylene (PE: polyethyiene) and fiber reinforced plastic (FRP) pipes, which are made to have a tight and airtight bond. More specifically, a spiral indentation groove is formed on the outer circumferential surface of the coupling part of the pipe (1). 101 is formed and a split protrusion 201 is formed inside the inlet 203 of the coupling 2 and a spiral joint protrusion 202 is formed on the inner circumference thereof. The helical joint of the coupling 2 is formed by bringing the packing 301 into close contact with the protrusion 201 and inserting the end of the tube 1 into the inlet of the coupling 2 to select the tube or the coupling 2 to rotate slightly. In the joint structure of a conventional polyethylene (PE: polyethyiene) and fiber reinforced plastic (FRP) pipe body in which the spiral inlet groove 101 of the pipe body 1 is helically coupled to the protrusion 202:

The spiral nut 401 of the tubular body 1 has a lock nut 4 having a spiral protrusion 401 corresponding to the spiral recess groove 101 of the tubular body 1 and a packing groove 402 formed on one side thereof. Spirally coupled to 101 so that the end of the tubular body 1 protrudes through the lock nut 4 to join the coupling 2 and the tubular body 1 and is formed at the inlet 203 of the coupling 2. The packing 5 is inserted into the packing groove 204 to move the lock nut 4 forward to press-fit the coupling 2 to form a structure in which the lock nut is added to the joint structure of the conventional polyethylene and fiber reinforced plastic pipe. Advancing (4) causes one surface of the lock nut (4) to be in close contact with the end of the coupling (2) and simultaneously to the packing grooves (204) and 402 of the coupling (2) and the lock nut (4). ), The coupling (2), the tube (1) and the lock nut (4) support each other by the packing (5) is injected into the compression of the rigid polyethylene and fiber-reinforced plastic tube There is an advantage in obtaining a structure.

Pipe Fittings, Couplings, Fittings, Packings, Pipes

Description

Connection structure of P.E and F.R.P pipe}

1 is a partial cross-sectional exploded perspective view showing the internal configuration of the present invention

2 is a cross-sectional view of the present invention.

*** Explanation of main parts of drawing ***

1: tube

101: spiral indentation groove

2: coupling

201: split protrusion

202: spiral joint protrusion

203: slot

3: packing

4: Lock Nut

401: spiral protrusion

402: Packing groove

5: packing

The present invention relates to the joint structure of polyethylene (PE: polyethyiene) and fiber reinforced plastic (FRP) pipes, and more specifically, to form a recessed groove in the outer periphery of the end of the pipe made of polyethylene and fiber reinforced plastics. The spiral is formed in the inner circumference of the coupling made of urethane, and the end of the tube is pressed into the coupling to rotate the tube or the coupling slightly. In addition to the conventional pipe joint structure that combines the tube and the pipe through the lock nut and packing to the coupling portion of the tube and the coupling to make a more robust and hermetic coupling.

In general, the tubular body is made of a variety of materials and the joint method of joining the tubular body will vary depending on the material and the size of the tubular body.

For example, when joining small-diameter metal pipes, it is common to process screws on the outer periphery of the end of the joint pipe, and the inner circumferential surface of the joint pipe is also threaded to form a screw thread and the pipe joints are manufactured. The pipe is made by expanding one end of the pipe to form a joint, and the other pipe is inserted into the pipe to be expanded, and then the filling adhesive such as mortar and beeswax is added to the pipe and the synthetic resin pipe is mainly joined to the outside of the pipe. In many cases, in case of PVC (polyvinyl chloride) pipes, which are mainstream synthetic resin pipes, both ends of the pipes are introduced into the couplings, and the pipes are bonded to each other using PVC adhesives. Will be connected.

However, if the material of the tubular body is polyethylene and fiber-reinforced plastic tubing, it is not bonded with the PVC adhesive, so that both ends of the coupling body are pressed into the urethane coupling having a predetermined elasticity, and the elasticity of the urethane coupling is combined. have.

However, as described above, the combination of polyethylene and fiber-reinforced plastic tubing by pressing both ends of the coupling tubing into the urethane coupling by using the elasticity of the urethane coupling may be used according to the purpose of the tubing, that is, the pipe used. As the temperature of the tube changes due to changes in the water temperature of the hot water and seasonal factors such as winter and summer, the tube repeats expansion and expansion, which is a conventional method that combines the tube by using the elasticity of urethane coupling, not forced binding. As a method of joining polyethylene and fiber-reinforced plastic tubular materials, the thermal expansion coefficient of urethane coupling and polyethylene and fiber-reinforced plastic tubing is incorrect, causing a gap between the tubing and the coupling or when pressure is applied to the tubing by hydraulic pressure, There existed a fault, such as the edge part of a space | interval leaving water leakage.

Applicant forms a divided protrusion in the inner center of the urethane coupling in order to improve the above-mentioned shortcomings, the packing is in close contact with the divided protrusion, and the inner groove of the urethane coupling and the outer groove of the spiral coupling grooves and joints are formed Therefore, the proposed model was proposed to register Utility Model Registration No. 0363157, in which the tube introduced into the inner surface of the coupling is helically coupled with the coupling, and the end of the tube is kept in close contact with the packing. 0363157) to improve the design of the coupling and the tube to cope with the external shock, vibration and internal water pressure through the packing through the tube inlet of the coupling and to lock the nut and the coupling by attaching the lock nut to the tube. Polyethylene and islands allow for a more tight bond and prevent loosening of the tube associated with the coupling during use The purpose is to propose a joint structure of oil-reinforced plastic tube and urethane coupling.

In order to achieve the above object, the present invention installs a log nut on the outer circumference of the tube to be coupled with the coupling to closely adhere to the coupling coupled to the tube to prevent the coupling part of the tube and the coupling from being loosened and couples the lock nut to the coupling. Through the packing between the rings it is possible to more securely and tightly coupled to the pipe joint, which will be described in detail based on the accompanying drawings.

First is a partial cross-sectional exploded perspective view showing the configuration of the present invention and Figure 2 is a cross-sectional view showing a combined state of the present invention.

That is, the present invention forms a spiral indentation groove 101 on the outer peripheral surface of the coupling portion 1 of the tubular body 1, and forms a split protrusion 201 and a spiral joint protrusion 202 on the inner surface of the coupling 2 to divide the protrusion 201. The packing (3) in close contact with the inside of the inlet (203) of the coupling (2), and the end of the polyethylene and fiber-reinforced plastic tube is inserted and rotated slightly to make the tubular body (1) to the spiral joint protrusion (202) of the coupling (2). In the joint structure of conventional polyethylene and fiber-reinforced plastic tubing, which are spiral-fitted in accordance with the spiral indentation groove 101 of:

The packing groove 204 is formed in the inlet 203 of the coupling 2, and the spiral protrusion 401 corresponding to the spiral inlet groove 101 of the tubular body 1 is formed in the inner circumference of the lock nut 4. The coupling groove 2 is formed through the packing 5 at the outer circumference of the tube body 1, which is formed by the helical coupling of the tube body 1 by the packing groove 402. It is a structure combined by pressing close contact.

In view of the operation of the present invention as described above, the spiral projection 401 of the lock nut 4 and the spiral indentation groove 101 of the tubular body 1 are helically coupled to the lock nut 4 to the tubular body 1. However, the end of the tubular body (1) is to protrude through the locknut (4) and the packing (5) is located in front of the locknut (4) so that the tubular body (1) inlet 203 of the coupling (2) By rotating the tubular body by a small amount by pressing in, the spirally indented groove 101 formed on the outer periphery of the end of the tubular body 1 and the helical joint protrusion 202 of the coupling 2 are helically coupled, and the packing 5 is coupled to the coupling (2). When the lock nut 4 is rotated and moved forward by being inserted into the packing groove 204, the one end of the packing 5 is introduced into the packing groove 402 of the lock nut 4 and simultaneously pressed and coupled to the coupling groove 2. And the lock nut 5 are in close contact with each other, and the compressed packing 5 blocks the helical indentation groove 101 located at the inner side, and the lock nut 4 and the coupling 2 are in close contact with the ends thereof. Closely coupled by the restoring force of the packing (5) to be compressed in the packing grooves (204, 402) to prevent the coupling portion of the coupling 2 and the tubular body (1) from loosening due to external vibration or impact will be.

According to the present invention as described above, the tube 1 is pressed into the coupling 3 so that the end of the tube 1 is brought into contact with the packing 301 of the divided protrusion 302 formed inside the coupling 2. When the coupling 3 and the tubular body 1 are selected and rotated by a predetermined amount, the spiral protrusion 202 is introduced into the spiral recess groove 101 formed on the outer circumferential surface of the tubular body 1 so that the tubular body 1 and the coupling body 2 In addition to the joint structure of the conventional polyethylene and fiber-reinforced plastic tubing, in which the lock nut 4 is advanced, one surface of the lock nut 4 is brought into close contact with the end of the coupling 2, and the coupling 2 and The coupling 2, the tubular body 1, and the lock nut 4 are connected to each other by the packing 5 in which the packing 5 is simultaneously injected into the packing grooves 204 and 402 of the lock nut 4. By supporting, there is an advantage in that a joint structure of rigid polyethylene and fiber-reinforced plastic tube can be obtained.

Claims (1)

A spiral indentation groove 101 is formed in the outer peripheral surface of the coupling part of the tubular body 1, and a split protrusion 201 is formed in the inlet 203 of the coupling 2 and a spiral joint protrusion 202 is formed in the inner circumference thereof. 201), the packing 301 is in close contact with the inlet of the coupling (2), the end of the tube (1) by pressing the tube or the coupling (2) by selecting a small rotation and the spiral joint protrusion (2) In the joint structure of a conventional polyethylene (PE: polyethyiene) and fiber reinforced plastic (FRP) pipe body in which the spiral inlet groove 101 of the pipe body 1 is helically coupled to 202: The spiral nut 401 of the tubular body 1 has a lock nut 4 having a spiral protrusion 401 corresponding to the spiral recess groove 101 of the tubular body 1 and a packing groove 402 formed on one side thereof. Spirally coupled to 101 so that the end of the tubular body 1 protrudes through the lock nut 4 to join the coupling 2 and the tubular body 1 and is formed at the inlet 203 of the coupling 2. The joint structure of the polyethylene and fiber-reinforced plastic tube characterized in that the packing (5) is put into the packing groove (204) to advance the lock nut (4) to be pressed and bonded to the coupling (2).

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