KR101064955B1 - Pipe connector - Google Patents

Abstract

The present invention relates to a pipe fitting for connecting two pipe ends to each other. More specifically, it is possible to connect the pipes with only a small portable tool, and at the same time eliminate the impact on the pipes, thereby preventing breakage or cracking of the metal structure. It is possible to prevent the occurrence and extend the service life, and to provide a pipe fitting that can firmly fix the pipe connection portion to minimize the possibility of water leakage, the jaw in contact with the outer surface of each pipe 40 at both ends A pregnant part 11 is formed, and at least one cutout groove 12 is formed in the tightening part 11 in the longitudinal direction, and a plurality of inclined protrusions 13 protrude radially on the outer surface of the tightening part 11. Connector 10; An o-ring 20 interposed between an inner surface of the connection pipe 10 and an outer surface of each pipe 40; Fixing nut 30 is inserted into contact with the outer surface of the tightening portion 11 so as to press the tightening portion 11 by rotation, and the pressing nut 33 is fastened to correspond to the inclined protrusion 13 on the inner surface 30 Disclosed is a piping fitting consisting of a combination of;

Description

Pipe connector

The present invention relates to a pipe fitting used to connect a pipe and each end of the pipe to each other.

Generally, in order to connect metal pipes such as stainless steel and copper in the longitudinal direction, as shown in FIG. 5, each pipe is inserted into the inside of the connection pipe, and then a method of pressing and compressing both ends of the connection pipe is used.

FIG. 5 is a cross-sectional view showing a conventional pipe connection structure in which pipes are generally connected by crimping, in order to interconnect two pipes 3 (one pipe not shown) with each other on the outer surface of each end of the pipe 3. Connection pipes 1 are fastened to each other, and both ends of the connection pipes 1 are provided with grooves formed in the inner circumference to form a crimping portion 2 on which the metal ring 4 and the rubber ring 5 are seated. have.

In the connection structure, the metal ring 4 and the rubber ring 5 having a circular cross section are seated in the crimping portion 2 of the connection pipe 1, and the metal ring 4 and the rubber ring 5 are When the pipe (3) is inserted into the inside of the connection pipe (1) is in contact with the outer surface of the pipe (3). At this time, although not shown, when the outer surface of the crimping portion 2 is crimped with a crimping press (compression tool), the outer diameter of the crimping portion 2 is reduced and the metal ring 4 and the rubber ring 5 seated therein are reduced. Simultaneously compressed and compressed to the outer side of the pipe 3, the compressed metal ring 4 and rubber ring 5 provide airtightness so that no leakage occurs between the pipe 3 and the connecting pipe 1.

This crimping connection pipe consists of a punching process using a press technique, and the manufacturing process includes curling for cutting the pipe and pulling the tee at the end of the pipe, surface treatment, primary expansion, surface treatment, and crimping. ) Work, inserting metal ring (round metal ring), beveling for beveling, welding, marking and inspection after heat treatment, and inserting rubber ring, the product is completed and packed and shipped. It is manufactured in a complex process.

Therefore, the connection pipe manufacturing by the press method, the manufacturing cost is expensive, the process defect occurs by about 20 to 70% depending on the material, the quality distribution is large, there is a problem that the quality is not uniform, there is a problem in the pipe (3) As a temporary impact is applied due to press compression, there is a problem in that tissues are broken or fine cracks are generated, thereby deteriorating durability and inferior airtightness.

In addition, excessive use of molding oil or cleaning agent required during the press process causes not only poor manufacturing environment but also environmental pollution, and large equipment size and weight make it difficult to move due to its large size. There is a problem.

The present invention has been made to solve the above problems, it is possible to extend the endurance life by preventing the damage or cracking of the metal structure by preventing the impact on the pipe while at the same time enables the pipe connection work with only a small portable tool. The purpose is to provide a pipe fitting that can be securely fixed to the pipe connection to minimize the possibility of leakage.

In the present invention for achieving the above object, in the pipe fitting for connecting the two pipes 40 with each other, a fastening portion 11 in contact with the outer surface of each pipe 40 is formed at both ends, the fastening portion At least one incision groove 12 is formed in the longitudinal direction in the (11), a plurality of inclined projections 13 on the outer surface of the tightening portion (11) connecting pipe 10 radially protruding; An o-ring 20 interposed between an inner surface of the connection pipe 10 and an outer surface of each pipe 40; Fixing nut 30 is inserted into contact with the outer surface of the tightening portion 11 so as to press the tightening portion 11 by rotation, and the pressing nut 33 is fastened to correspond to the inclined protrusion 13 on the inner surface 30 ); Is characterized by a combination of.

A preferred embodiment of the present invention is characterized in that a fastening protrusion 15 is formed on the inner surface of the tightening portion 11 to compress the outer surface of the pipe 40.

In the preferred embodiment of the present invention, each of the pressing protrusions 33 is a first protrusion 34 having a low projecting height so as to correspond to a high point of each of the inclined protrusions 13, and the low of each inclined protrusion 13. (Iii) a second projection 35 having a high projecting height so as to correspond to the point.

In a preferred embodiment of the present invention, a sealing groove 19 is formed around the inner surface of the tightening part 11, and a sealing protrusion 21 inserted into the outer surface of the O-ring 20 to correspond to the sealing groove 19. Characterized in that formed.

According to an exemplary embodiment of the present invention, at least one rib 22 corresponding to the incision groove 12 protrudes from the o-ring 20 so as to fit and seal the incision groove 12.

In the preferred embodiment of the present invention, a binding protrusion 17 is formed on the outer surface of the tightening part 11 to prevent the fixing nut 30 from being separated when the fixing nut 30 is rotated and pressed, and the fixing nut 30 is formed. It characterized in that the binding groove 37 is formed to receive and bind the binding protrusion 17 on the inner surface of the).

According to the present invention, the pipe connection can be performed using only a small and movable tool such as a spanner, which is a tool for tightening a nut, without using a large and heavy crimping equipment requiring a hydraulic or pneumatic means as in the related art. Therefore, the mobility is good and the operation is easy, there is an advantage that the work efficiency is improved.

In addition, since the temporary impact, such as using a conventional crimping equipment, is not applied to the pipe joint portion and is gradually deformed under pressure, the structure of the pipe is not deformed or fine cracks are generated, and thus the durability of the pipe is not impaired. The connection part is firmly fixed and has the effect of completely preventing leakage.

Hereinafter, with reference to the accompanying Figures 1 to 4 will be described in detail a specific embodiment of the present invention.

1 is a perspective view showing a pipe fitting structure according to an embodiment of the present invention, Figure 2 is a cross-sectional view showing a state before connection of a pipe fitting according to an embodiment of the present invention, Figure 3 is a pipe according to an embodiment of the present invention The section shows the state after the fitting is connected.

As shown in Figures 1 to 3, the pipe fitting according to the present invention is a connection pipe 10 for connecting the ends of the pipe 40 with each other, between both ends of the connection pipe 10 and the pipe 40 O-ring 20 which is interposed in and is fixed to the fixing nut 30 that is bound to the outer surface of the connecting pipe 10 and pressed.

Here, the connecting pipe 10 is fastened to the pipe 40 in the same structure with both ends, so that only one end of the connection pipe 10 is shown in the drawings, and the illustration of the other end is omitted.

An end portion of the connecting pipe 10 is formed with a tube-shaped tightening portion 11, the incision groove 12 cut in the longitudinal direction in at least one or more places of the tightening portion 11 is formed, The tightening part 11 is a part for contacting the outer surface of the pipe 40 to compress the pipe 40 as shown in FIG.

A plurality of inclined protrusions 13 are radially formed on the outer surface of the tightening part 11, and each inclined protrusion 13 has a low point having a low protrusion height with respect to the circumferential direction and the other side thereof. It is inclined to form a high point with a high protrusion.

The inner surface of the tightening portion 11 is formed with a fastening protrusion 15 protruding in the inward direction, when the fastening protrusion 15 is formed, as shown in Figure 3 the tightening protrusion 15 is the outer surface of the pipe 40 It comes in contact with. Here, the shape of the fastening protrusion 15 is shown in an inverted triangular shape, without being limited to this, those skilled in the art is not limited to a specific form can be in various forms, such as rectangular, circular, lozenge shape. It can be seen that not only, but also in the form of a bearing, for example.

A binding protrusion 17 may be formed on an outer surface of the tightening portion 11, and the binding protrusion 17 may have a fixing nut 30 when the fixing nut 30, which will be described later, is bound to the outer surface of the tightening portion 11. It has a function to be fixed without being separated in the longitudinal direction of the connecting pipe (20). That is, referring to FIG. 3, the fixing nut 30 is provided to be in contact with the outer surface of the tightening part 11, and the binding protrusion 17 is formed on the inner surface of the fixing nut 30 as shown in FIG. 1. It is inserted into the binding groove 37 in the form of a '.

In addition, the fixing nut 30 is provided to be rotated at an angle on the outer surface of the tightening part 11, and when the fixing nut 30 is rotated by an angle, the binding protrusion 17 moves into the inside of the binding groove 37. Is inserted and fixed, so that the binding projection 17 is caught off the jaw of the binding groove 37 formed due to the 'b' shape, so that the fixing nut 30 in the longitudinal direction of the connection pipe 10 Can be fixed without leaving.

The tightening part 11 is formed with a sealing groove 19 whose inner surface is recessed in the outward direction, and the sealing projection 21 having a semicircular cross section on the outer surface of the O-ring 20 in correspondence with the sealing groove 19. 3), the sealing protrusion 21 may be inserted into the sealing groove 19 to improve airtightness as shown in FIG. 3.

At this time, when the cutting groove 12 is formed in the hermetic groove 19 to prevent the lowering of the airtightness due to the portion, the outer surface of the O-ring 20 also has a rib in the quantity and position corresponding to the cutting groove 12 By providing the ribs 22 so that the ribs 22 are inserted into the cutout grooves 12, the airtightness can be prevented.

On the other hand, a plurality of pressing protrusions 33 are formed on the inner surface of the fixing nut 30 to correspond to the inclined protrusions 13 of the connecting pipe 10, and each of the pressing protrusions 33 is each inclined protrusion 13. The first protrusion 34 having a low protrusion height to correspond to the high point of the second protrusion 35 and the second protrusion 35 having a high protrusion height to correspond to the low point of each inclined protrusion 13 are formed. When the fixing nut 30 is rotated, the pressing protrusion 33 compresses the tightening unit 11 in the centrifugal direction so that the tightening unit 11 and the pipe 40 are in close contact with each other.

In the drawings, reference numerals 16 and 36 refer to the 'wrench operating portion' formed on the outer surface of the connector 10 and the fixing nut 30, respectively, and each wrench operating portion 16 and 36 is a wrench or a spanner. It is a part formed in a hexagonal shape so that a rotating tool such as a spanner can be contacted.

Hereinafter, referring to FIG. 4, the action of compressing the tightening part 11 in the centrifugal direction by the rotation of the fixing nut 40 will be described in more detail.

4 is a sectional view taken along the line A-A of FIG. 3, (A) shows a state before pressurization, and (B) shows a state after pressurization.

3 and 4 (A), the tightening portion 11 is located on the outer surface of the pipe 40, the fixing nut 30 is located on the outer surface of the tightening portion 11, the pipe 40 of the At the end, an O-ring 20 made of rubber or silicone is positioned to close the tightening part 11 and the pipe 40.

At this time, Figure 4 (A) is a cross-sectional view of the fixing nut 30 is inserted into the outer surface of the tightening portion 11, but not rotated in the slide inserted state along the longitudinal direction of the connecting pipe (10). The first protrusion 34 having a lower height among the pressing protrusions 33 of the fixing nut 30 is in contact with the low point of the inclined protrusion 13 and has a relatively high second protrusion 35. Is in contact with the outer surface of the tightening portion 11 corresponding to the portion without the inclined protrusion (13).

When the fixing nut 30 is bound to the outer surface of the tightening part 11 as described above, the second protrusion 35 is in contact with the wall of the high point of the inclined protrusion 13 and thus fixed to the connecting pipe 10. The nut 30 does not rotate clockwise.

On the contrary, when the wrench or spanner is put on both wrench operating portions 16 and 36 and the fixing nut 30 is rotated counterclockwise (see arrow), the first protrusion 34 is inclined as shown in FIG. While pressing the tightening part 11 in the centrifugal direction while moving to a high point of (13), the cutting part 11 is formed in the tightening part 11, so As a result, the tightening portion 11 is reduced in the centrifugal direction, and the width of the cutout groove 12 is also narrowed.

When the tightening portion 11 is reduced in the centrifugal direction as described above, the tightening protrusion 15 pressurizes the outer wall of the pipe 40, through which the tightening portion 11 compresses the pipe 40 to connect the pipe ( 10) and the pipe 40 is firmly fixed, and the O-ring 20 interposed between the connecting pipe 10 and the pipe 40 is also compressed to maintain airtightness, and the rib 22 also has a narrowed incision. Compression in the groove 12 further improves airtightness.

On the other hand, if the fixing nut 30 is rotated at an angle to continue to rotate while the connecting pipe 10 and the pipe 40 fixed to each other, the first projection 34 is a high degree of the inclined projection (13). At the same time, the second projection 35 having a relatively high height is located at the low point of the inclined protrusion 13, wherein the high point of the inclined protrusion 13 is the first protrusion 34. Since it is located between the second projection 35 and the force greater than the rotational force of the fixing nut 30, the fixing nut can be fixed in the state (B) of Figure 4 without rotating.

In addition, as described above, since the binding protrusion 17 is inserted into the binding groove 37 and hung on the jaw, the fixing nut 30 is not separated in the longitudinal direction of the connecting pipe 10.

Therefore, the fixing nut 30 is not rotated in the crimped state of the tightening part 11 of the connecting pipe 10 and at the same time does not escape in the longitudinal direction of the connecting pipe 10 through the connecting pipe 10. One pipe 40 can be maintained firmly connected.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art may make various modifications, changes, and substitutions without departing from the essential characteristics of the present invention. It is to be understood that the scope of protection of the present invention is therefore to cover all claims within the scope of the appended claims and their equivalents.

1 is a perspective view showing a pipe fitting structure according to an embodiment of the present invention.

Figure 2 is a cross-sectional view showing a state before connection of the pipe fitting according to an embodiment of the present invention.

3 is a cross-sectional view showing a state after connecting the pipe fittings according to an embodiment of the present invention.

FIG. 4 is a cross-sectional view of the A-A section of FIG. 3, wherein (A) shows a state before pressurization and (B) shows a state after pressurization.

5 is a cross-sectional view showing a conventional pipe connection structure.

<Explanation of Signs of Major Parts of Drawings>

10 ... Connector 11 ... Clamp

12 ... Incision groove 13 ... Inclined protrusion

15 ... fastener 17

19 ... closed groove

20 ... O-ring 21 ... Sealed protrusion

22 ... rib

30 ... lock nut 33 ... pusher

37.

40 ... pipe

Claims (6)

In the plumbing fitting for connecting two pipes 40 to each other, Fastening portions 11 are formed at both ends thereof and in contact with the outer surface of each pipe 40, and at least one cutaway groove 12 is formed in the tightening portions 11 in the longitudinal direction, and the A plurality of inclined protrusions 13 on the outer surface of the connecting pipe 10 radially protruding; An o-ring 20 interposed between an inner surface of the connection pipe 10 and an outer surface of each pipe 40; Fixing nut 30 is inserted into contact with the outer surface of the tightening portion 11 so as to press the tightening portion 11 by rotation, and the pressing nut 33 is fastened to correspond to the inclined protrusion 13 on the inner surface 30 Piping fittings characterized by the combination of; The method of claim 1, Pipe fittings, characterized in that the fastening protrusions (15) for crimping the outer surface of the pipe (40) is formed on the inner surface of the tightening portion (11). delete The method of claim 1, Pipe fittings, characterized in that the sealing groove (19) is formed around the inner surface of the tightening portion (11), the sealing projection (21) is inserted into the sealing groove (19) on the outer surface of the O-ring (20). The method of claim 1, Pipe fittings, characterized in that the at least one rib 22 is inserted into the incision groove (12) on the outer surface of the O-ring (20) protruding. The method of claim 1, A binding protrusion 17 is formed on an outer surface of the tightening part 11 to prevent the fixing nut 30 from being separated when the fixing nut 30 is rotated and compressed, and the binding protrusion is formed on an inner surface of the fixing nut 30. Piping fitting, characterized in that the binding groove 37 is formed to receive and fasten (17).

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