KR200436811Y1 - A pressing device for pipe joint - Google Patents

Abstract

The present invention relates to a pipe fitting crimping tool, and more particularly, to a pipe fitting crimping tool for preventing the occurrence of damage and play caused by the excessive compression around the pipe joint.

The pipe fitting crimping tool according to the present invention, a pair of opposing body that is connected to the hydraulic mechanism and pivoted, the pressing jaw connected to each end of the body to crimp and connect the pipe and the pipe fitting, the pair of the body is opposed In the crimping tool for pipe connection having a fixed plate for connecting, the inner circumferential surface of the pressing jaw is formed with a semi-circular groove for receiving and crimping the seam of the pipe fitting, the one side edge of the semi-circular groove overlaps the pipe and the pipe fitting A crimping protrusion surface for crimping parts to be connected to each other is formed, and the other edge of the semi-circular groove is formed with an arc-shaped portion for gripping the pipe during crimping and preventing a crimping deformation of the pipe.

Crimping tool, semicircular groove, crimp protrusion, arc shape

Description

Crimping tool for pipe connection {A PRESSING DEVICE FOR PIPE JOINT}

1 is a view showing a connection method of a conventional pipe and pipe fittings,

2 is a perspective view of a conventional crimping tool for pipe connection;

3 is a perspective view of the crimping tool for pipe connection according to the present invention,

Figure 4 is a perspective view of the compression jaw of the crimping tool for pipe connection according to the present invention,

5 is a front view showing a state in which a pair of crimping jaws are engaged with each other;

6 is an exploded view of the crimping tool for pipe connection according to the present invention,

7 is an operation state diagram of the crimping tool for pipe connection according to the present invention.

Explanation of symbols on the main parts of the drawings

1: tube 2: fitting

3: seam 4: O-ring

5: circular groove 6: crimping portion

7: fixed crimping part 8: movable crimping part

10a, 10b: body 20a, 20b: body

21: convex portion 22: first spring groove

23: first spring 24: second spring

25: second spring groove 30a, 30b: compression jaw

32: semicircular groove 34: crimping protrusion surface

36: arc shape 38: coupling pin

40a, 40b: fixed plate 42: pivot pin

44: retaining ring

The present invention relates to a pipe fitting crimping tool, and more particularly, to a pipe fitting crimping tool for preventing the occurrence of damage and play caused by the excessive compression around the pipe joint.

1 shows a connection method of a conventional pipe 1 and a pipe fitting 2. As shown, the pipe fitting (2) is mainly used when connecting the pipe. The pipe fitting 2 is generally configured in a tubular shape and bent or branched into a 1-shaped, T-shaped, L-shaped, cross-shaped, etc., so as to interconnect two or more tubes. As shown, the seam 3 portion of the pipe fitting 2 is bent substantially upwardly convex along the outer circumferential surface, and an O-ring 4 is inserted into the inner space thereof. In the case of connecting the pipe 1 and the pipe fitting 2, the pipe 1 is inserted into one side opening of the pipe fitting 2, and is crimped together using a crimping tool. As a result of this compression, the portion of the joint 3 is compressed, so that the O-ring 4 installed in the inner space of the joint 3 is pressurized to hermetically seal the pipe 1 and the fitting 2 to prevent leakage. You can do it. On the other hand, the periphery of the seam 3 is also squeezed so that the pipe 1 is firmly connected so as not to be separated from the fitting 2 by the external force.

2 shows a perspective view of a conventional crimping tool used for such a pipe joint operation. The two bodies (10a, 10b) having a polygonal groove and a crimping portion (6) having a circular groove (5) on its inner circumferential surface between the facing front end portion is pin-bonded to be rotatable.

The pressing part 6 of each of the bodies 10a and 10b is a fixed pressing part 7 integrated with the bodies 10a and 10b and a movable pressing part 8 which is separated from the body and is installed to be slidably moved forward and backward. When the body is opened while supporting the movable crimping portion 8 to the main body, the movable means 8 retracts the movable crimping portion 8 and moves forward toward the fixed crimping portion 7 of the front portion.

On the other hand, among the conventional crimping tools, there is also disclosed a crimping tool composed of only a fixed crimping portion having a polygonal groove having a diameter smaller than the tube diameter without the movable crimping portion as described above.

In such a conventional crimping tool, as the crimping portion 6 is composed of a polygonal groove and a circular groove 5 formed in the inner circumferential surface thereof, a seam portion is accommodated in the circular groove 5 and compressed, and the outer polygon A groove, usually a hexagonal groove, is crimped around the tube seam.

In the conventional crimping tool, since the circular grooves on both sides of the crimping portion are formed in a polygonal shape, when crimping the pipe and the pipe fitting, the peripheral side of the pipe joint, that is, the portion where the pipe fitting and the pipe overlap (A; see FIG. 1). ) Can be prevented from being crimped into polygons and separated by external forces, but the tube outer surface portion B (see FIG. 1) adjacent to the other end of the pipe joint, ie adjacent to the pipe joint, is also compressed together into a polygon. In this way, when the pipe outer surface portion B adjacent to the pipe joint is squeezed, a gap is generated between the joint part opening of the pipe fitting and the tube due to the squeezing, and there is a fear of leakage or the like. As impurities and the like penetrate and are deposited, corrosion or breakage of the pipes is caused, which makes it difficult to maintain and manage the pipes, and there is a disadvantage in that the cost is high.

Accordingly, the present invention was devised to compensate for the disadvantages of the conventional pipe crimping fitting tool as described above, so that the pipe outer surface portion adjacent to the pipe joint is not squeezed, and the gap between the joint opening and the pipe is It is an object of the pipe fitting crimping tool to prevent the occurrence and, therefore, to prevent leakage or the penetration of impurities.

The objects and advantages of the present invention will be described in more detail below, and will be further embodied by the examples. In addition, the objects and advantages of the present invention can be realized by the means shown in the claims and combinations thereof.

Pipe fitting (2) crimping tool according to the present invention for achieving the object as described above, the pair of opposed body (20a, 20b) and the angle of the body (20a, 20b) connected to the hydraulic mechanism and pivoted Compression jaws (30a, 30b) connected to the front end for crimping and connecting the pipe (1) and the pipe fitting (2), and a fixed plate (40a, 40b) for facing the pair of the body (20a, 20b) In the crimping tool for pipe connection, a semicircular groove 32 is formed on the inner circumferential surface of the crimping jaws 30a and 30b to receive and crimp the joint 3 of the pipe fitting 2, and the semicircular groove 32 One side edge is formed with a compression protrusion surface 34 for crimping and mutually connecting the overlapping portion of the pipe (1) and the pipe fitting (2), the other edge of the semi-circular groove (32) is gripped at the other edge of the tube And arc-shaped portion 36 for preventing the compression deformation of the tube is characterized in that it is formed.

Here, the pressing projection surface 34 is characterized in that the plurality is arranged along the inner peripheral surface of the pressing jaw (30a, 30b) to form a polygon with each other.

In addition, the pressing projection surface 34 is characterized in that the minimum center distance of the polygonal openings they form is smaller than the radius of the pipe fitting (2).

In addition, the radius of the arc-shaped portion 36 is characterized in that it is formed corresponding to the radius of the pipe (1) to be connected.

Hereinafter, with reference to the accompanying drawings will be described in detail the configuration of the crimping tool (2) for pipe connection according to the present invention.

Figure 3 is a perspective view of the crimping tool for pipe connection according to the present invention, Figure 4 is a perspective view of the crimping jaw of the crimping tool for pipe connection according to the present invention, Figure 5 is a front view showing a state in which a pair of crimping jaws are engaged with each other. 6 is an exploded view of the crimping tool for pipe connection according to the present invention, Figure 7 is an operating state of the crimping tool for pipe connection according to the present invention.

As shown in Figures 3 to 6, the crimping tool for pipe connection according to the present invention includes a body (20a, 20b), a fixed plate (40a, 40b), the pressing jaw (30a, 30b).

The body (20a, 20b) is a portion for opening and closing the compression jaws (30a, 30b) to be described later as it is pivoted in and out by the operation of a hydraulic mechanism (not shown), a pair of symmetrical opposite Is located.

A convex portion 21 is formed at the inner central portion of the bodies 20a and 20b, and the convex portion 21 serves as a support point of a lever for allowing the pair of bodies 20a and 20b to be pivotally operated. Do this. That is, as the convex portions 21 are opposed to each other, the bodies 20a and 20b are pivoted in and out.

The first spring groove 22 is formed in the center of the convex portion 21, and the first spring 23 is inserted into the first spring groove 22. Due to the elastic force of the first spring 23, when the body (20a, 20b) is pivoted can obtain a buffering effect, so that it can be pivoted again in the opposite direction by the restoring force of the first spring 23 after being pivoted do.

The pressing jaws 30a and 30b are pivotally connected to the front end portions of the bodies 20a and 20b. The compression jaws (30a, 30b) is opened and closed in accordance with the pivoting operation of the body (20a, 20b) is a portion that receives the tube (1) and then crimps. 4 shows a detailed configuration of such compression jaws 30a and 30b in a perspective view, and FIG. 5 shows a state in which a pair of compression jaws 30a and 30b are engaged.

As shown in Figures 4 and 5, the inner side of the pressing jaw (30a, 30b) is a tube (1) or pipe fitting (2) therein when a pair of pressing jaw (30a, 30b) is opposed to each other The recesses are generally curved in a semicircular shape so as to form an acceptable space portion. The curved inner circumference is formed with a semi-circular groove 32 that can be accommodated and compressed to the portion of the seam 3 of the pipe fitting 2 described above. Accordingly, when the pair of crimping jaws (30a, 30b) is closed while crimping the pipe fitting (2), the semi-circular groove (32) while the pipe joint (3) portion is accommodated and is inserted into the O- The ring 4 is compressed to hermetically seal between the tubes.

One side edge of the semi-circular groove 32, more specifically, the crimping projection surface 34 for crimping and fixing the portion (A; see FIG. 1) where the pipe 1 and the pipe fitting 2 overlap each other. Is formed. A plurality of the compression protrusions 34 are formed along the inner circumferential surface of one side of the semicircular groove 32, and these compression protrusions 34 are polygonal with each other, preferably, a pair of compression jaws 30a and 30b face each other. When losing, it is preferable that the hexagonal opening is formed as a whole.

The compression protrusion surface 34 is a portion for crimping the overlapping portion of the pipe 1 and the pipe fitting 2 as the compression jaw (30a, 30b) is closed, a pair of compression jaws (30a, 30b) face each other The minimum center distance (R ₁ ; see FIG. 5) between the crimping protrusion surface 34 from the center of the hexagonal opening formed when losing is formed smaller than the radius R _j (see FIG. 1) of the pipe fitting 2. Accordingly, when the pair of compression jaws (30a, 30b) is closed and abutted, the pipe fitting (2) is pressed by the compression projection surface 34 is pressed.

An arc-shaped portion 36 is formed at the other edge of the semi-circular groove 32 of the inner circumference of the pressing jaw (30a, 30b). The arc-shaped portion 36 is a portion corresponding to a portion B (see Fig. 1) that is adjacent to the outside of the seam 3 portion of the pipe fitting 2 when pressed with a compression tool. In the conventional compression jaws (30a, 30b), as this portion is squeezed together with the pipe fitting (2) part, a constant play occurs between the opening of the pipe (1) and the pipe fitting (2), or leakage occurs There has been a problem that the foreign matter is introduced to cause damage to the tube (1). Therefore, in this invention, the other edge of the semi-circular groove 32 is made circular arc shape, and it is comprised so that the part B adjacent to the joint 3 part of the pipe fitting 2 may not be crimped | bonded.

Since the portion of the tube 1 adjacent to the outside of the seam 3 should not be crimped, the radius R ₂ of the arc portion 36 (see FIG. 5) is the radius R of the tube 1 to be connected. _p ; see FIG. 1). Therefore, even when the compression jaws 30a and 30b are closed and pressurized, the arc-shaped portion 36 does not pressurize the tube 1 so that the tube 1 is not crimped and no play occurs. This arc-shaped portion 36 does not pressurize the tube 1, but instead of pressurizing the pressure-producing portion on the opposite side, the tube fitting 2 and the tube portion overlapping with the tube fitting 2 may occur. It serves to grip to prevent torsion or vibration.

The compression jaws 30a and 30b are pivotally connected to the front ends of the bodies 20a and 20b, as shown in FIG. Accordingly, one end side surface of the pressing jaw (30a, 30b) is generally opened in a 'c' shape, the front end of the body (20a, 20b) is inserted into the 'c' shaped opening. After the compression jaws 30a and 30b and the bodies 20a and 20b are inserted and coupled, they are mutually coupled by the coupling pins 38. When the bodies 20a and 20b are pivoted, the compression jaws 30a and 30b may be opened and closed while pivoting about the coupling pin 38. Between the body 20a, 20b and the pressing jaw (30a, 30b) is also additionally provided with a second spring 24 may perform a buffering action and elasticity. The second spring 24 is fixedly installed in a groove (not shown) installed in the lower portion of the second spring groove 25 and the pressing jaw (30a, 30b) located on the front end side of the body (20a, 20b) .

The pair of bodies 20a and 20b are coupled by a pair of fixing plates 40a and 40b from both outer portions. The fixed plates 40a and 40b and the respective bodies 20a and 20b are coupled by pivot pins 42, as shown in FIG. 6, and the bodies 20a and 20b are centered around the pivot pins 42. Connected so that the pivot can be activated. A fixing ring 44 is coupled to the outside of the pivot shaft 42 to prevent the flow and departure of the pivot shaft 42.

Hereinafter, the operation relationship of the crimping tool for pipe connection according to the present invention. Figure 7 shows the operating state of the crimping tool for pipe connection according to the present invention.

As shown, the first crimping tool is in a closed state in which a pair of crimping jaws 30a and 30b are engaged with each other. When the lower portion of the body 20a, 20b is pressed inward, the openings of the compression jaws 30a, 30b are opened while the body 20a, 20b and the compression jaws 30a, 30b are pivoted. Here, after inserting the pipe 1 and the pipe fitting 2 assembly, using the hydraulic mechanism to re-pivot the lower portion of the body (20a, 20b) in the opposite direction, respectively, the pressing jaw (30a, 30b) is closed A portion of the joint 3 of the pipe fitting 2 and one side thereof is compressed. The semi-circular groove 32 of the pressing jaw (30a, 30b) is accommodated in the joint (3) portion is received, the pipe fitting (2) and the pipe by the pressing projection surface 34 formed on one side of the semi-circular groove (32) The portion (A) where (1) overlaps is firmly coupled to the pipe and the pipe fitting (2) so as not to be separated and separated by the external force is pressed into a polygon. While the pipe and the pipe fitting 2 are press-fitted, the arc-shaped portion 36 formed on the other side of the semicircular groove 32 is simply gripped without pressing the pipe portion B adjacent to the seam 3. Prevents flow or twisting when crimped.

So far, the present invention has been described in detail with reference to the embodiments of the present invention, but the scope of the present invention is not limited thereto, and will include the embodiments and the substantial equivalent range of the present invention. In particular, the opening structure of the pressing jaw portion of the pressing tool according to the present invention, as part of the pressing tool, will be applicable to various pressing tools having different types of bodies and / or fixing plates.

According to the present invention as described above, it is possible to prevent the portion of the outer surface of the tube adjacent to the tube joint from being squeezed, thereby preventing the occurrence of play between the joint opening and the tube, thereby preventing leakage or infiltration of impurities. It has an excellent effect to prevent the flow or twisting of the tube that may occur during compression.

Claims (4)

A pair of opposing bodies 20a and 20b connected to the hydraulic mechanism and pivoted, and a compression jaw 30a connected to each end of the bodies 20a and 20b to crimp and connect the pipe 1 and the pipe fitting 2. In the crimping tool for pipe connection having a 30b and a fixed plate (40a, 40b) for connecting the pair of bodies (20a, 20b) facing each other, Semicircular grooves 32 are formed on the inner circumferential surfaces of the compression jaws 30a and 30b to accommodate and compress the seams 3 of the pipe fittings 2, and at one edge of the semicircular grooves 32, the pipe 1 and A crimping protrusion surface 34 is formed to crimp the overlapping portions of the pipe fittings 2 to be fixed to each other. The other edge of the semicircular groove 32 is gripped by the pipe 1 at the edge of the semi-circular groove 32 to compress the deformation of the pipe. Crimping tool for pipe connection, characterized in that the arc-shaped portion 36 is formed to prevent. The method of claim 1, The pressing projection surface 34 is a crimping tool for pipe connection, characterized in that arranged along the inner circumferential surface of the pressing jaw (30a, 30b) a plurality of polygons to each other. The method of claim 2, The crimping projection surface (34) is a crimping tool for pipe connection, characterized in that the minimum center distance of the polygonal openings they form is smaller than the radius of the pipe fitting (2). The method according to any one of claims 1 to 3, The arc of the arc-shaped portion (36) is a crimping tool for pipe connection, characterized in that formed corresponding to the radius of the pipe (1) to be connected.

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