KR20130003744A - A pipe connector - Google Patents

Abstract

PURPOSE: A pipe connector is provided to be used under high-temperature and high-pressure environment and to prevent a connected object from releasing by improving joining strength. CONSTITUTION: A pipe connector(1) comprises a connection body(10), a fastening nut(20), rotation prevention units(5,6), and a fixing nut(40). The connection body is made of a plastic material and has a fluid passage and an extension(12) stepped from one end of the fluid passage. The fastening nut made of a metal material is inserted into the extension of the connection body and has threads(23) coupled to the thread connection(51) of an object(50). The rotation prevention units prevent the fastening nut from being rotated when the thread connection of the object is coupled to the threads of the fastening nut and comprise rotation prevention protrusions(21,22) and rotation prevention grooves(15,16). The fixing nut fixes the fastening nut inserted into the extension of the connection body.

Description

A pipe connector

The present invention relates to a pipe connector, and more particularly, inserting a fastening nut made of metal into a plastic connecting body, and at the opposite surface of the connecting body and the fastening nut, a rotation preventing jaw and an anti-rotation groove are formed. It relates to a pipe connector provided with a rotation preventing means for screwing the installation object (faucet, etc.) to the fastening nut.

In general, fluids such as oil, gas, water including cold and hot water flow through pipes, and various pipe structures are designed depending on how the fluid is used.

For example, it is not possible to use a single pipe according to the environment of the construction site, cut the pipe to a certain length and connect them with a screw structure as a separate connector so that the fluid flows, or the fluid between the pipe and the pipe manually. Screw open / close valves that block or allow flow to the connector, or screw the connector to the end of the pipe and then screw the faucet to the connector.

The connector may also be screwed into a pressure gauge that measures the flow of fluid.

As described above, the connector is variously applied in the field of piping, most of the structure is connected to the screw method, so that the operator directly screwed the installation object, such as a valve or pressure gauge or faucet to the connector directly Will be installed.

The connector is usually made of brass or plastic. In this case, when the connector is made of brass, the bonding strength with the installation object is good, but the manufacturing cost is not only high but also harmful to the human body. In the case of the manufacture of plastic material, the manufacturing cost is low, but there is a disadvantage in that the bonding strength with the installation object falls.

Recently, there is a trend to reduce the manufacturing cost and to manufacture the connector with a plastic material that is not harmful to the human body, but in addition to the above-mentioned disadvantages, the plastic connector allows the operator to apply excessive force in the process of screwing the metal object to the plastic connector. Then, there is a problem that the coupling portion of the plastic connector is broken, and also the plastic connector only has a weak coupling strength, there is a problem that the installation object is easily loosened or the coupling part is broken when an external force acts on the installation object.

An object of the present invention for solving the above problems is to insert a fastening nut of a metal material in the connection body of the plastic material and to form a rotation preventing jaw and a rotation preventing groove on the opposite surface of the connection body and the fastening nut. It is provided with an anti-rotation means to screw the installation object (faucet, etc.) to the fastening nut, to prevent damage to the coupling portion even if the operator exerts excessive force when screwing the installation object, only the fastening nut It is formed of a material and the remaining parts are formed of a plastic material to improve the bonding strength and reduce the manufacturing cost, and also to prevent the loosening of the installation object by external force and to provide a pipe connector that can be used in high temperature and high pressure environment. have.

The present invention for achieving the above object, in the pipe connector for connecting the installation object having a screw connection to one end, the fluid passage is formed so that the fluid passes therein, one end of the fluid passage The fluid passage and the stepped portion of the connection body made of a plastic material formed with an expansion tube, the insertion nut is inserted into the expansion portion of the connection body and the inner circumferential surface of the metal fastening nut formed with a screw portion screwed to the screw connection portion of the installation object, The anti-rotation jaw formed in any one of the connecting body and the fastening nut and the anti-rotation groove formed in the other, the anti-rotation groove is inserted, when the screw connection of the installation object is coupled to the screw portion of the fastening nut Anti-rotation means for preventing the rotation of the nut, screwed to the outer peripheral surface of the connecting body Ulreo end engaging portion are formed so as to take the fastening nut, characterized in that made in a fixing nut for fixing the lock nut.

The present invention includes inserting a fastening nut of a metal material into the connecting body made of plastic material and provided with rotation preventing means formed on the opposite surface of the connecting body and the fastening nut to form a rotation preventing jaw and an anti-rotation groove. By screwing the installation object (faucet, etc.) to the screw, to prevent damage to the coupling portion even if the operator exerts excessive force when screwing the installation object, only the fastening nut is formed of metal material and the remaining parts are made of plastic material Formation can reduce the manufacturing cost while improving the bonding strength, and also prevent the loosening of the installation object by the external force due to improving the bonding strength and can be used in high temperature and high pressure environment.

In addition, by forming the rotation preventing means on both the outer peripheral surface side and the lower end side of the fastening nut, the coupling force between the fastening nut and the connecting body is greatly improved, and even if the operator exerts excessive force, it is possible to prevent the rotation of the fastening nut, The installation object can be more firmly coupled to the tightening nut side.

In addition, by forming a heat shielding groove in the locking portion of the fixing nut, it is possible to reduce the transfer of high-temperature heat to the locking portion through the fastening nut and to release the heat smoothly, thereby improving the holding force of the locking portion. The nut can be firmly supported and leaks can be prevented.

In addition, the O-ring groove formed in the fastening nut is formed in the "c" shape to be in close contact with the three surfaces of the O-ring, thereby providing a more stable and fixed sealing surface is further improved sealing properties.

1 is an exploded perspective view showing a pipe connector according to the present invention.
Figure 2 is a perspective view of the connecting body and the o-ring and fastening nut in Figure 1,
3 is a perspective view showing a case in which another embodiment of the rotation preventing means is applied in FIG.
Figure 4 is a cross-sectional view showing a state before fully screwing the fixing nut in the pipe connector according to the invention,
5 is a cross-sectional view showing a state in which the installation object is screwed after the fixing nut completely screwed in the pipe connector according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

As shown, the pipe connector 1 according to the present invention, for connecting the installation object 50 having a screw connection portion 51 at one end, the connection body 10, the fastening nut 20 and It comprises a rotation preventing means (5,6), and the fixing nut (40).

As the installation object 50, all products connected to the pipe as well as the on-off valve or pressure gauge or faucet may be applied.

The connection body 10, which is injection molded from a plastic material, is formed through the fluid passage 11 so that the fluid passes therethrough, and one end of the fluid passage 11 and the step difference with the fluid passage 11 Losing duct 12 is formed.

At this time, the expansion portion 12 is formed to a diameter larger than the diameter of the fluid passage (11).

The expansion tube 12 is formed to be inclined inwardly so that the fastening nut 20 can be smoothly inserted into the expansion tube 12.

That is, the inner circumferential surface of the expansion pipe 12 and the outer circumferential surface of the fastening nut 20 which are in contact with each other are formed to be inclined (tapered) inward.

In addition, a diameter reducing part 13 is formed at the lower end of the expansion part 12 so that the O-ring 30 fitted to the outer circumferential surface of the fastening nut 20 is in close contact, and the O-ring is formed at the upper end of the diameter reducing part 13. The inclined portion 14 is formed so that it does not break when the 30 is inserted into the diameter reducing portion 13.

If the upper end of the diameter reducing portion 13 is not formed as the inclined portion 14 but formed at right angles, the O-ring 30 of the fastening nut 20 is reduced in diameter in the expansion portion 12 ( 13) will be torn or broken when inserted.

In addition, a screw portion 17 is formed on an outer circumferential surface of one end of the connecting body 10 to be screwed with the fixing nut 40.

On the other hand, the shape of the connecting body 10 shown in the drawings is an example, the connecting body 10 can be changed in various forms depending on the product to be applied, such as valves, elbows, tees.

In addition, the fastening nut 20 is formed of a metal material, and is inserted into the expansion part 12 of the connecting body 10, and the screw connection part 51 and the screw of the installation object 50 are installed on the inner circumferential surface thereof. The threaded portion 23 is formed to be coupled.

In addition, since the inside of the fastening nut 20 is penetrated, when the screw connection part 51 of the installation object 50 is screwed to the threaded portion 23 of the fastening nut 20, the connection body 10 And the installation object 50 are in communication.

The locking jaw 25 is formed on the outer circumferential surface of the fastening nut 20 so as to be caught by the locking portion 41 of the fixing nut 40 which will be described later.

In addition, the outer circumferential surface of the fastening nut 20 facing the inner circumferential surface of the expansion pipe 12 is formed to be inclined inward, so that the insertion pipe smoothly inserted into the expansion pipe 12.

At this time, only the outer circumferential surface of the lower side of the outer circumferential surface of the fastening nut 20 is inclined in the inward direction.

In addition, an o-ring groove 24 having a “c” shape is formed on an outer circumferential surface of the fastening nut 20, and the expansion part 12 of the fastening nut 20 and the connection body 10 is formed in the o-ring groove 24. O-ring 30 sealing between the gap is inserted.

The O-ring groove 24 is formed at the lower end of the outer peripheral surface of the fastening nut 20, and is formed in the form of "c" is in close contact with the three surfaces of the O-ring (30). That is, the O-ring groove 24 forms a stable and fixed sealing surface in contact with the O-ring 30 and three surfaces, thereby further improving the sealing property.

In other words, the "-" shaped O-ring groove 24 is stably in close contact with the three surfaces of the O-ring 30, the other one surface of the O-ring 30 is a diameter reducing portion of the expansion portion 12 ( 13) It is in close contact with the inner circumferential surface to improve the sealing property.

In addition, the fixing nut 40 is screwed to the threaded portion 17 formed on the outer circumferential surface of the connecting body 10, and at one end thereof, a locking portion 41 is formed to be caught by the fastening nut 20. The fastening nut 20 inserted into the expansion pipe 12 is fixed.

In addition, the locking portion 41 of the fixing nut 40 to the heat blocking groove 42 on one side in contact with the locking jaw 25 to prevent a lowering of the bearing force due to heat transmitted from the fastening nut 20 in a high temperature environment. ) Is formed.

The heat blocking groove 42 formed in the locking portion 41 reduces the heat transfer area by reducing the contact area with the locking jaw 25 of the locking nut 20, as well as the locking portion 41 at the locking nut 20. It will release the heat transferred to) smoothly.

On the other hand, when a high temperature fluid flows inside the pipe connector 1, the high temperature heat is transferred to the locking portion 41 of the fixing nut 40 through the fastening nut 20, and at this time, the fixing nut 40 If the heat blocking groove 42 is not formed in the locking portion 41 of the), the locking portion 41 is deformed by high temperature heat, which is easily deformed, and the supporting force is weakened, thereby firmly tightening the fastening nut 20. There is a risk of water leakage due to poor support.

Therefore, by forming the heat-transfer groove 42 in the locking portion 41 of the fixing nut 40, it is possible to reduce the transfer of high temperature heat to the locking portion 41 through the fastening nut 20 and smooth the heat It is to be discharged so as to improve the holding force of the locking portion 41 and to firmly support the fastening nut 20 to prevent leakage.

As such, when the heat blocking groove 42 is formed in the locking portion 41 of the fixing nut 40, it is possible to use even in an environment of high temperature and high pressure.

The anti-rotation means 5 and 6 may include anti-rotation jaws 21 and 22 formed on any one of the connecting body 10 and the fastening nut 20, and the anti-rotation jaws 21 formed on the other. , 22 is inserted into the rotation preventing groove (15, 16), the coupling nut (20) when the screw connection portion 51 of the installation object 50 is coupled to the screw portion 23 of the fastening nut (20) It will prevent the rotation of the.

That is, because the coupling body 10 and the coupling nut 20 is a combination of a plastic material and a metal material, when the worker screwed the installation object 50 with excessive force, the coupling nut 20 is connected to the connection body It can run in the expansion part 12 of (10).

Therefore, the rotation preventing means (5, 6) is formed to prevent rotation between the connecting body 10 and the fastening nut (20).

The anti-rotation means (5), the anti-rotation jaw 21 is formed to protrude on the outer peripheral surface of the fastening nut 20, it is formed in the insertion direction of the fastening nut 20 is inserted into the expansion pipe 12, The anti-rotation groove 15 is formed on the inner circumferential surface of the expansion tube 12 of the connection body 10 facing the anti-rotation jaw 21.

Here, the anti-rotation jaw 21 is formed in a plurality of spaced apart from each other in the circumferential direction on the outer circumferential surface of the fastening nut 20, the anti-rotation groove 15 is in the circumferential direction on the inner circumferential surface of the expansion pipe 12 A plurality of spaced apart from each other is formed.

In the drawing, four anti-rotation jaws 21 are formed on the outer circumference of the fastening nut 20 at intervals of 90 degrees, and four anti-rotation grooves are also spaced at intervals of 90 degrees on the inner circumferential surface of the expansion part 12 of the connecting body 10. Although the case of forming 15 is shown, the number of the anti-rotation jaw 21 and the anti-rotation groove 15 may be configured in various ways.

For example, as shown in FIG. 3, eight anti-rotation jaws 21 are formed on the outer circumferential surface of the fastening nut 20, and eight anti-rotation grooves 15 are formed on the inner circumferential surface of the expansion part 12 of the connecting body 10. ) May be formed to protrude.

In this case, the plurality of rotation preventing jaws 21 formed on the outer circumferential surface of the fastening nut 20 may be formed in different sizes.

That is, as shown in FIG. 3, the large anti-rotation jaw 21 and the small anti-rotation jaw 21 may be alternately formed, and although not shown in the drawing, the shapes of the plurality of anti-rotation jaws 21 may be differently formed. It may be. For example, the anti-rotation jaw 21 and the anti-rotation jaw of a semi-circular or triangular cross section may be alternately formed.

As such, when the plurality of anti-rotation jaws 21 are formed in different sizes and shapes, the installation direction of the fastening nut 20 with respect to the connection body 10 may be uniformly set.

On the other hand, the anti-rotation groove 15 formed on the inner circumferential surface of the expansion tube 12 is naturally formed to correspond to the size and shape of the anti-rotation jaw (21).

In addition, the rotation preventing means 5 described above is a rotation preventing jaw 21 and the anti-rotation groove 15 formed on the outer circumferential surface of the fastening nut 20 and the inner circumferential surface of the expansion pipe 12, the position of the In addition to the lower portion of the fastening nut 20 can be formed.

That is, the anti-rotation means 6, the anti-rotation jaw 22 is formed to protrude to the lower end of the fastening nut 20, a plurality of spaced apart from each other by a predetermined interval in the circumferential direction, the anti-rotation groove 16 Is formed on the bottom surface (12a) of the expansion pipe 12 of the connecting body 10 facing the anti-rotation jaw 22, it is formed by forming a plurality of spaced apart from each other in the circumferential direction.

In the drawing, four anti-rotation jaws 22 formed at the lower end of the fastening nut 20 are formed at intervals of 90 degrees, and the anti-rotation grooves formed on the bottom surface 12a of the expansion pipe 12 of the connection body 10 are formed. Although FIG. 16 shows only four cases formed at intervals of 90 degrees, the number and shape of the anti-rotation jaw 22 and the anti-rotation groove 16 may be changed.

As such, when the rotation preventing means (5, 6) is formed in only one of the outer peripheral surface side and the lower end side of the fastening nut 20, the coupling force between the fastening nut 20 and the connecting body 10 is weak. When the worker applies excessive force, the fastening nut 20 may rotate, but as shown in the drawing, when the anti-rotation means 5 and 6 are formed on both the outer peripheral surface side and the lower end side of the fastening nut 20, the fastening nut Coupling force is greatly improved between the 20 and the connecting body 10 can prevent the rotation of the fastening nut 20 even if the operator applies excessive force.

Hereinafter, the operation of the pipe connector 1 according to the present invention will be described.

First, the fastening nut 20 in which the O-ring 30 is inserted into the O-ring groove 24 is inserted into the expansion part 12 of the connecting body 10, wherein the fastening nut 20 is inserted into the outer peripheral surface of the fastening nut 20. The plurality of anti-rotation jaw 21 formed is inserted into the plurality of anti-rotation grooves 15 formed on the inner circumferential surface of the expansion pipe 12.

When the fastening nut 20 is inserted into the expansion pipe 12, the anti-rotation jaw 21 formed on the outer circumferential surface of the fastening nut 20 is inserted into the anti-rotation groove 15 formed on the inner circumferential surface of the expansion pipe 12. In the inserted state, the anti-rotation jaw 22 formed at the lower end of the fastening nut 20 is partially inserted into the anti-rotation groove 16 formed at the bottom surface 12a of the expansion pipe 12. The o-ring 30 of the fastening nut 20 is in a state of being seated on the upper end of the diameter reducing part 13 of the expansion part 12.

Thereafter, when the fixing nut 40 is screwed to the threaded portion 17 formed on the outer circumferential surface of the connecting body 10, the locking portion 41 of the fixing nut 40 is connected to the outer circumferential surface of the fastening nut 20. Since the locking jaw 25 is formed, the locking nut 20 is dragged together when the fixing nut 40 is screwed together.

When the tightening of the fixing nut 40 is completed, the locking jaw 25 of the coupling nut 20 is in a state of being seated at one end of the connecting body 10 and at the same time the locking portion of the fixing nut 40 is fixed. Supported by (41) is prevented from being separated, the O-ring 30 of the fastening nut 20 is inserted into the diameter reducing portion 13 of the expansion portion 12 while being in close contact with the inner peripheral surface of the diameter reducing portion 13 It is sealed.

In addition, the anti-rotation jaw 22 formed at the lower end of the fastening nut 20 is completely inserted into the anti-rotation groove 16 formed on the bottom surface 12a of the expansion pipe 12.

Thereafter, the worker is screwed to the installation object 50 to the fastening nut 20 of the pipe connector (1) is completed as described above, in this case, the operator applies an excessive force in the screwing process to install the installation object (50) Even if it is rotated, the anti-rotation jaws 21 and 22 formed on the outer peripheral surface and the lower end of the fastening nut 20 are inserted into the anti-rotation grooves 15 and 16 formed on the inner peripheral surface and the bottom surface 12a of the expansion pipe 12. Since the fastening nut 20 does not rotate because it is in a state, the operator can more firmly couple the installation object 50 to the fastening nut 20 of the pipe connector 1.

1: pipe connector 5, 6: anti-rotation means
10: connecting body
11: fluid passage 12: expansion pipe
13: diameter reducing portion 14: inclined portion
15,16: Anti-rotation groove 17,23: Screw part
20: tightening nut 21, 22: anti-rotation jaw
24: O-ring groove 25: Jamming jaw
30: O-ring 40: fixing nut
41: engaging portion 42: thermal barrier groove
50: mounting object 51: screw connection

Claims (7)

In the pipe connector for connecting the installation object 50 having the screw connection portion 51 at one end,
The fluid passage 11 is formed to penetrate the fluid therein, and one end of the fluid passage 11 has a connection body 10 made of a plastic material in which an expansion pipe 12 is formed to be stepped with the fluid passage 11. Wow,
Inserted into the expansion tube 12 of the connecting body 10 and the inner circumferential surface and the fastening nut 20 of the metallic material formed with a screw portion 23 is screwed with the screw connection portion 51 of the installation object 50 and ,
Rotation prevention jaw (21, 22) formed in any one of the connecting body 10 and the fastening nut 20, and the rotation prevention groove (15, 16) formed in the other is inserted into the rotation prevention jaw (21, 22) Rotation prevention means (5, 6) to prevent the rotation of the fastening nut 20 when the screw connection portion 51 of the installation object 50 is coupled to the screw portion 23 of the fastening nut 20 and,
In addition to being screwed to the outer circumferential surface of the connecting body 10, one end portion is formed with a catching portion 41 to be caught by the fastening nut 20, including a fixing nut 40 for fixing the fastening nut 20 Pipe connector, characterized in that made by. The method of claim 1,
The rotation preventing means 5,
The anti-rotation jaw 21 is formed to protrude on the outer circumferential surface of the fastening nut 20, and is formed in the insertion direction of the fastening nut 20 inserted into the expansion pipe 12.
The anti-rotation groove 15 is a pipe connector, characterized in that formed on the inner peripheral surface of the expansion pipe portion 12 of the connecting body 10 facing the anti-rotation jaw (21). The method of claim 2,
The anti-rotation jaw 21 is formed on the outer circumferential surface of the fastening nut 20 in a circumferential direction spaced apart from each other by a predetermined interval,
The anti-rotation groove (15) is a pipe connector, characterized in that formed on the inner circumferential surface of the expansion pipe (12) spaced apart from each other at regular intervals. The method of claim 3, wherein
The plurality of anti-rotation jaw 21 is a pipe connector, characterized in that formed in different sizes. The method according to any one of claims 1 to 4,
The rotation preventing means 6,
The anti-rotation jaw 22 is formed to protrude to the lower end of the fastening nut 20, a plurality of spaced apart from each other by a predetermined interval in the circumferential direction,
The anti-rotation groove 16 is formed on the bottom surface 12a of the expansion part 12 of the connecting body 10 facing the anti-rotation jaw 22, and is formed by forming a plurality of spaced apart from each other in a circumferential direction. Pipe connector characterized in that. The method of claim 1,
On the outer circumferential surface of the fastening nut 20 is formed an "ring" shaped o-ring groove 24 and the o-ring groove 24 between the fastening nut 20 and the expansion portion 12 of the connecting body 10. O-ring 30 is installed to seal the insert,
The inner circumferential surface of the expansion pipe portion 12 and the outer circumferential surface of the fastening nut 20 which are in contact with each other so that the fastening nut 20 can be smoothly inserted into the expansion pipe portion 12 are formed to be inclined inwardly. ,
A diameter reducing part 13 is formed at the lower end of the expansion part 12 so that the O-ring 30 is in close contact, and at the upper end of the diameter reducing part 13, the O-ring 30 is inserted into the diameter reducing part 13. Pipe connector characterized in that the inclined portion 14 is formed so as not to break when inserted. The method of claim 1,
The locking jaw 25 is formed on the outer circumferential surface of the fastening nut 20 so as to be caught by the locking portion 41 of the fixing nut 40.
The blocking portion 42 of the fixing nut 40 has a heat blocking groove 42 at one side contacting with the locking jaw 25 so as to prevent a decrease in bearing capacity due to heat transferred from the fastening nut 20 in a high temperature environment. Pipe connector, characterized in that formed.

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