KR100578450B1 - pipe pressing joint - Google Patents

Abstract

Disclosed is an improved pipe crimping device that enables the connection of pipes regardless of diameter, minimizes the failure rate with uniform crimp strength, and enables crimping with less force. The crimping device includes a plurality of chain links 230 pivotally connected between the first and second fixed blocks 210 and 220 and the first and second fixed blocks, and coupling means on the inner side of each chain link. A circular arc groove 241 coupled to the inner circumferential surface and contacting the outer circumferential surface of the pipe to be compressed, and a connection link 270 rotatably connecting adjacent circular arc blocks; A plurality of circular arc blocks are provided with an operating means for operating the first and second fixed blocks in the direction in which the plurality of circular blocks are pressed against the outer circumferential surface of the pipe or in the direction of releasing the pressing.

Since the pressing device maintains the circular arc blocks at regular intervals by the spherical body 245 elastically appearing, it is maintained at equal intervals to uniformly distribute the pressing force, thereby minimizing the consumption pressing force by distributing uniform pressing force. In addition, the chain link and the circular arc block are added or subtracted to a length corresponding to the diameter of the pipe to enable crimping of pipes having different diameters.

Pipe, crimp, chain link, arc block, sphere

Description

Pipe pressing joint

1 and 2 is a schematic view showing a conventional pipe crimping device,

3 and 4 is a plan view of the main operation of the present invention the pressing device,

5 is a perspective view illustrating main parts of the first and second main blocks employed in the pressing apparatus of the present invention;

Figure 6 is a perspective view showing a chain link portion employed in the present invention crimping device,

7 is a sectional view of principal parts of the present invention, the pressing device.

* Explanation of symbols for main parts of the drawings

110,120 ... 1,2 main block 112,122 ... spinning pin

210,220 ... 1,2 fixed block 230 ... chain link

240 ... Arc Block 250 ... Connections

250 ... Link 245 ... Spherical

246 ... spring

The present invention relates to a pipe crimping device for crimping and connecting pipes, and in particular, it is possible to connect the pipes irrespective of their diameters, and to improve the crimping ability even with a small force by minimizing the defect rate with uniform crimp strength. It relates to a pipe crimping device.

An example pipe joint crimping tool is disclosed in Korean Utility Model Application No. 1997-27597 and is shown in FIGS. 1 and 2. The two body 10a, 10b having a crimping portion 20 having a polygonal groove and a circular groove 28 on its inner circumferential surface between the facing end portions thereof is coupled to the pin 51 so as to be rotatable.

The pressing portions 20 of the bodies 10a and 10b are separated from the fixed pressing portions 21 integrated with the bodies 10a and 10b and the bodies 10a and 10b so as to be movable forward and backward. It consists of a movable crimping portion 23 provided, while the body (10a) (10b) is opened while supporting the movable crimping portion 23 to the main body retracts the movable crimping portion (23) and when tightened fixed fixed portion ( Actuating means for advancing toward 21).

This pipe joint crimping tool presses two movable crimping parts 23 to the front during the tightening operation of the bodies 10a and 10b to squeeze the pipes to be connected when the pipes are crimped. It is supposed to be.

However, the crimping tool as described above is not suitable for connecting pipes having different diameters because the size of the crimping portion 20 is determined.

In addition, by having a structure in which the pipe is coupled to the hexagonal groove 22 and compressed, a large force is required to compress the pipe because only six components of the pressing force applied to the outer circumferential surface of the pipe are provided.

 The present invention has been made to solve the above problems, has the following object.

First, there is provided an improved pipe crimping device that can be used universally by crimping even if the diameters of pipes are different.

Second, the present invention provides a pipe crimping device that can crimp and crimp pipes with less force.

Pipe crimping device of the present invention for achieving the above object is a first, second fixed block, a plurality of chain links are rotatably connected between the first and second fixed blocks, and coupling means on the inner surface of each chain link. A plurality of circular arc blocks coupled to the inner circumferential surface and contacting the outer circumferential surface of the pipe to be squeezed, the connecting links rotatably connecting the mutually adjacent circular arc blocks 240, and the plurality of circular arc blocks And an actuating means for operating the first and second fixed blocks in a direction in which they are pressed against the outer circumferential surface of the pipe or in a direction in which the pressure is released.

The coupling means has a connecting rib formed on the upper and lower surfaces of the circular arc blocks, one end of the engaging rib is caught by the locking rib and the other end is rotatably supported by the chain link.

The actuating means is rotatably connected to the fixed plate by a hinge pin, and a pair of first and second main blocks connected to the first and second fixed blocks at each end thereof, and the other end of the first and second main blocks. It is provided with a cylinder that rotates to be near or far from each other.

In addition, the present invention is characterized in that the crimping device is provided with a spherical body that is retractably inserted into the side surfaces of the arc blocks adjacent to each other, and a spring for elastically projecting the spherical body.

According to the above features of the present invention, the present invention crimping device evenly compresses the outer circumferential surface of the pipe by a plurality of chain links and circular arc blocks to enable crimping even with a small force. In addition, the chain link and the circular arc block are added or subtracted to a length corresponding to the diameter of the pipe to enable crimping of pipes having different diameters.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3 to 6 showing the pipe crimping device of the present invention, which is rotatable between the first and second fixed blocks 210 and 220 and the first and second fixed blocks 210 and 220. A plurality of chain links 230 and a plurality of circular arcs are coupled to the inner surface of each chain link 230 by a coupling means, and an arc groove 241 is formed on the inner circumferential surface and contacts the outer circumferential surface of the pipe to be crimped. Block 240 and the operating means for operating the first and second fixed blocks (210, 220) in the direction in which the plurality of circular arc blocks 240 are pressed to the outer peripheral surface of the pipe or in the direction of releasing the compression is provided. do.

Referring to FIG. 6, the coupling means has locking ribs 242 formed on the upper and lower surfaces of the circular arc blocks 240, and a locking piece 251 having one end hooked to the locking rib 242 is formed and the other end thereof. The connection piece 250 is rotatably supported by the chain link 230.

The locking piece 251 is capable of sliding movement along the locking rib 242 when the arc blocks 240 are unfolded or retracted.

In addition, the circular arc blocks 240 are rotatably connected to each other by the connection link 270 between the arc blocks 240 adjacent to each other. Reference numeral 271 denotes a bolt for fixing the connection link 270 to each arc block 240.

In the exemplary embodiment of the present invention, the circular arc block 240 is divided into four portions to compress the pipe, but the number of the circular arc blocks 240 may be added or subtracted to a length corresponding to the diameter of the pipe.

Referring to FIG. 5, the operating means is rotatably connected to the fixing plate 150 by hinge pins 112 and 122 and connected to the first and second fixing blocks 210 and 220 at one end thereof. A pair of first and second main blocks 110 and 120 and a cylinder (not shown) for rotating the other ends of the first and second main blocks 110 and 120 to move closer or farther from each other.

A locking hole 111 is formed at one end of the first main block 110 to be rotatably pin-connected with the connection hole 211 of the first fixing block 210, and the second main block 120 is formed. At one end of the) is formed a locking groove 121 is coupled to or detachable from the locking pin 221 of the second fixing block 220.

Accordingly, the first fixing block 210 compresses the pipe while detaching only the second fixing block 220 with respect to the second main block 120 while being fixed to the first main block 110. When the two main blocks 110 and 120 are rotated by the cylinder, the first and second fixed blocks 210 and 220 are moved to move closer or farther from each other, thereby causing each arc block 240 to compress the pipe. Let's go.

In addition, referring to FIG. 7, a spherical body 245 which is inserted in a retractable manner and a spring 246 that elastically protrudes the spherical body 245 are built in the side surfaces of the mutually adjacent circular arc blocks 240. have. Accordingly, the clearance between the arc blocks 240 adjacent to each other is in close contact with the spherical body 245 so that the arc blocks 240 are maintained at a predetermined interval to uniformly compress the pipe.

The pipe crimping device of the present invention as described above first adjusts the length by adding or subtracting the number of the chain link 230 and the arc block 240 to a length corresponding to the diameter of the pipe to be connected.

Subsequently, the connection hole 211 of the first fixing block 210 is connected to the engaging hole 111 of the first main block 110 by pin coupling, and as shown in FIG. 3, the chain link 230 and the arc block. After 240 spans the outer circumferential surface of the pipe, the locking pin 221 of the second fixing block 220 is hooked into the locking groove 121 of the second main block 120.

Subsequently, the cylinder is operated to interlock the first and second main blocks 110 and 120, and the chain links 230 and the arc blocks 240 compress the outer circumferential surface as shown in FIG. 4. At this time, the pipe fittings and pipes are plastically deformed along the arc grooves 241 of the arc blocks 240 to connect the pipes.

At this time, between the circular arc blocks 240 is maintained at a predetermined interval by the spherical body 245 elastically wandering by the spring 246 to compress the pipe at a uniform pressure. The interlocking operation of the spherical body 245 and the spring 246 is the initial position of each circular arc block 240 when removing the external force applied to the first and second main blocks 110 and 120 and when applying the external force. Give it.

The present invention as described above is not limited to the above embodiments and can be practiced with many modifications without departing from the spirit and scope of the present application.

The pressing device of the present invention uniformly compresses the outer circumferential surface of the pipe by the plurality of chain links 230 and the circular arc block 240, thereby enabling the pressing with a small force. Furthermore, since each arc block 240 is maintained at a predetermined interval by the spherical body 245 that is elastically retracted, it is maintained at equal intervals to uniformly distribute the compressive force, thereby distributing uniform compressive force and minimizing the consumed compressive force.

In addition, the chain link 230 and the circular arc block 240 is added or subtracted to enable crimping of pipes having different diameters.

Claims (4)

First and second fixed blocks 210 and 220, A plurality of chain links 230 pivotally connected between the first and second fixed blocks 210 and 220; A plurality of circular arc blocks 240 coupled to inner surfaces of the chain links 230 and having circular arc grooves 241 formed on inner circumferential surfaces and contacting outer circumferential surfaces of pipes to be crimped; A connection link 270 for rotatably connecting the adjacent circular arc blocks 240; Pipe having a plurality of circular arc block 240 is provided with an operating means for operating the first and second fixed blocks (210, 220) in the direction of the compression or in the direction of releasing the compression of the pipe Crimping device. The method of claim 1, wherein the coupling means has a locking rib 242 is formed on the upper and lower surfaces of the circular arc block 240, one end is caught by the locking rib 242 is formed and the other end is And a connecting piece 250 rotatably supported by the chain link 230. According to claim 1 or 2, wherein the actuating means is rotatably connected to the fixing plate 150 by hinge pins 112 and 122, and the first and second fixed blocks 210 and 220 at each end thereof. And a pair of first and second main blocks 110 and 120 connected to each other, Pipe compression device comprising a cylinder for rotating the other end of the first and second main block (110) (120) so as to approach or away from each other. According to claim 1 or claim 2, the spherical body 245 is inserted into the side of the circular arc block 240 adjacent to each other, and the spring 246 to elastically project the spherical body 245 Pipe crimping device characterized in that provided.

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