KR100689605B1 - Pipe Coupling of Edgeless-type to Maintain Coupling Force - Google Patents

Abstract

The present invention is equipped with an annular jacket that is mounted to the portion where the two pipes are connected to surround the pipe to prevent leakage; A sealing member inserted in close contact with the inner circumferential surface of the jacket; Receiving portion formed by folding both ends of the jacket outward; And an insertion hole interposed between the receiving portion and the bolt is inserted therein, the support rod supporting the nut and the sleeve washer inserted into the inserted bolt, wherein the inner surface of the support rod insertion hole partially protrudes to the outer circumference of the support rod. And a protrusion having a contact surface having a predetermined thickness, and the insertion hole formed on the opposite side of the protrusion further includes an inclined portion having an inner diameter that gradually increases from a predetermined portion of the end to the outer periphery of the support rod.

According to the present invention, the inner surface of the bolt head, the sleeve washer, and the contact surface formed on the nut and the support rod are matched so that there is no part which is not contacted during the surface contact, thereby transmitting all the clamping force generated by the bolt and the nut to the support rod. It is effective.

Coupling, Edgeless, Support Rod, Sleeve Washer, Matching, Clamping Force

Description

Pipe Coupling of Edgeless-type to Maintain Coupling Force}

1 is a perspective view showing a state in which an embodiment of the pipe coupling of the present invention is fastened to a pipe.

FIG. 2 is a partial perspective view of the pipe coupling of FIG. 1. FIG.

3 is an enlarged perspective view of the supporting rod and the protrusion of FIG. 2;

4 is an enlarged perspective view of the supporting rod and the inclined portion of FIG. 2;

5 is an exploded perspective view showing that the nut, bolt head and sleeve washer are in contact with the support rod of FIG.

Figure 6a is a perspective view of the supporting rods of the prior art 1 and the prior art 2.

6B is a longitudinal sectional view showing a contact surface when the nut, sleeve washer and bolt are fastened to the support rod of FIG. 6A.

※ Explanation of code about main part of drawing ※

100: coupling 110: jacket

120: receiving portion 200: sealing member

300: bolt 320: sleeve washer

330: nut 400.415: support rod

410, 417: insertion hole 420, 422: protrusion

425, 427: contact surface 430: inclined surface

The present invention relates to an edgeless pipe coupling mounted on a portion where two pipes are connected to prevent leakage, and more particularly, to an annular jacket surrounding a pipe, a sealing member inserted in close contact with an inner circumferential surface of the jacket, An edge formed by folding both ends of the jacket and an insertion hole interposed therebetween, the insertion hole into which the bolt is inserted, and a sleeve washer inserted into the inserted bolt, and a support rod supporting the nut to maintain a fastening force to prevent leakage. It relates to a lease type pipe coupling.

In general, the pipe coupling connects two pipes to smoothly transfer the fluid, and the two pipes surround the contact portions to prevent the fluid from being leaked from the gap between the two pipes.

Conventional coupling consists of a metal jacket surrounding the outer periphery of the pipe, a sealing member of rubber material inserted into the inner circumferential surface of the jacket, a receiving portion provided at both ends of the jacket, and a supporting rod of metal or plastic material interposed in the receiving portion, By tightly tightening the jacket with a bolt passing through the insertion hole formed in the support rod and a nut for fastening the bolt, the sealing member prevents the gap between the two pipes, thereby preventing leakage of fluid from the gap. It compresses the surroundings so that the fluid leaking out of the gap does not leak out of the pipe.

However, the conventional coupling configured as described above has a weakening force as time passes, so that the pressing force applied to the sealing member is weakened, so that the fluid is extruded from a gap between the two pipes connected to each other, and the extruded fluid is connected to the pipe. Leakage to the outside occurs. That is, the support rod of the metal material can press the outer circumference of the pipe with a strong fastening force, but it does not smoothly cope with the vibration of the connected pipe, so that the nut fastened by the vibration of the frequent pipe is loosened, and thus the fastening force is weakened. have. In addition, the plastic support rod can smoothly cope with the vibration of the pipe, but both ends of the insertion hole of the plastic support rod in contact with the strongly fastened bolts and nuts are continuously subjected to a strong fastening pressure, thereby the amount of the insertion hole of the support rod Since the cross section is inclined, there is a problem in that a clearance occurs between both end surfaces and the bolt and the nut, thereby weakening the fastening force.

Accordingly, the applicant of the present application "tension bar (support rod) for pipe coupling with durability" to solve the above problems (application number: 20-2002-0018312, application date: June 17, 2002, the following "prior art 1" And "Pipe Coupling with Sleeve Washer" (application number: 20-2003-0003247, application date: February 04, 2003, hereinafter referred to as "prior art 2") filed a utility model registration application .

However, the above-described prior art 1 and 2 also have the disadvantage that the fastening force is not maintained for a long time, the brief description of the configuration and problems of these prior art with reference to the accompanying drawings below.

Figure 6a is a perspective view of the supporting rods of the prior art 1 and the prior art 2, Figure 6b is a longitudinal cross-sectional view showing the contact surface when the nut, sleeve washer and bolt is fastened to the supporting rod of Figure 6a.

The support rod 10 disclosed in the prior art 1 and 2 has a rod-shaped body 1, a plurality of insertion holes (3) and the inner side of the insertion hole (3) formed to penetrate perpendicularly to the longitudinal direction of the body (1) It consists of a projection 7 having a contact surface 4 which extends in contact with the nut, bolt head or sleeve washer. The projection 7 is formed so as to have an inclined surface 5 from the inner diameter side of the smooth contact surface 4 to the inner surface of the insertion hole 3 when viewed from the cross section.

Since the support rod 10 is formed as described above, the bolt 20 is inserted into the nut 20 to fasten the nut 20 or through the sleeve washer 30 or when the bolt 40 is fastened to the nut 20. The outer diameter D1 of the sleeve washer 30 or the inner circumferential surface of the head of the bolt 40 and the outer diameter D1 of the contact surface 4 are the same, but the inner diameter d of the nut 20 and the sleeve washer 30 and The outer diameter d of the body of the bolt 40 and the inner diameter D2 of the contact surface 4 are different by the length t by the inclined surface 5, and due to this difference, the nut 20 and the sleeve washer 30 ) And the inner circumferential surface and the contact surface 4 of the head of the bolt 40 generate a portion where the fastening force is not transmitted by the difference t between the inner diameters D2 and d.

When a strong fastening pressure is applied to the contact surface 4 for a long time, the inner surface and the contact surface 4 of the nut 20, the sleeve washer 30, and the bolt 40 head may be compressed and deformed to the inclined surface 5 side or the outer side. The spacing occurs in the contact portion causes a problem that the fastening force is weakened.

The present invention is to solve the problems of the prior art by increasing the contact area of the nut or sleeve washer and the support rods of the edgeless type so that the clamping force is maintained for a long time so that no gap occurs in the contact portion even if a strong tightening force is applied for a long time It is a technical task to provide a pipe coupling.

The present invention is an annular jacket surrounding the pipe; A sealing member inserted in close contact with the inner circumferential surface of the jacket; Receiving portion formed by folding both ends of the jacket outward; And an insertion hole interposed between the receiving portion and the bolt is inserted therein, the support rod supporting the nut and the sleeve washer inserted into the inserted bolt, wherein the inner surface of the support rod insertion hole partially protrudes to the outer circumference of the support rod. The above technical problem can be realized by providing an edgeless pipe coupling having a protrusion having a contact surface of a predetermined thickness.

In addition, the insertion hole formed on the opposite side of the protruding portion of the end of the insertion rod is further formed by forming a slope between the end of the rod and the end of the insertion hole by further forming an inclined portion of the inner diameter gradually increases toward the outer periphery of the support rod. This makes it easy to respond smoothly to the vibration of the pipe.

In addition, the support rod and the sleeve washer is preferably formed of a plastic material.

Hereinafter, with reference to the accompanying drawings, an embodiment of the present invention configured as described above will be described in detail.

1 is a perspective view showing an embodiment of the pipe coupling of the present invention is fastened to the pipe, Figure 2 is a partial perspective view of the pipe coupling of Figure 1, Figure 3 is an enlarged perspective view of the support rod and the projection of Figure 2 4 is an enlarged perspective view of the supporting rod and the inclined portion of FIG. 2, and FIG. 5 is an exploded perspective view illustrating that the nut, the bolt head, and the sleeve washer are in contact with the supporting rod of FIG. 2.

Pipe coupling 100 is a fastening force is maintained according to the invention the annular jacket 110 surrounding the outer periphery of the pipe 500; Sealing member 200 is in close contact with the inner peripheral surface of the jacket; A receiving part 120 formed by spot welding after folding both ends of the jacket 110 outward; And insertion holes 410 and 417 which are interposed in the receiving part 120 and into which the bolt 300 is inserted, and the inserted bolt head 310 and the sleeve washer 320 fitted to the bolt 300. And support rods 400 and 415 for supporting the nut 330, but the inner surface of the support rod insertion holes 410 and 417 partially protrudes to the outer circumference of the support rods 400 and 415 to have a predetermined contact surface 425. , 427 is provided with protrusions 420 and 422, and opposite sides of the protrusions 420 and 422 further form an inclined portion 430 having an inner diameter gradually increasing from a predetermined portion of the end to the outer periphery of the support rod. By providing a clearance between the body of the bolt and the end of the insertion hole (410, 417) to allow the bolt 300 to be inserted smoothly, and to smoothly respond to the vibration of the pipe.

The sleeve washer 320 may increase the fastening force and the buffering force through any one or both sides of the bolt head 310 side or the nut 330 side, the bolt body 340 passes through the receiving portion 120 It is preferable that the first slits 130 and 135 and the second slits 140 and 145 cut into predetermined lengths and widths are formed.

The operation of one embodiment of the present invention configured as described above will be described below.

The sealing member 200 is wrapped around the seam of the pipe, and then the annular jacket 110 is wrapped around the outer circumference of the sealing member 200. Then, the supporting rods 400 and 415 are interposed in both receiving portions 120, and then the bolt 300 passes through the first slit 130, the insertion hole 410, and the second slit 140, and on the opposite side. While inserting the sleeve washer 320 while passing through the other second slit 145, the other insertion hole 417 and the other first slit 135, and fastened by coupling with the nut 330.

When the bolt 300 and the nut 330 coupled as described above are tightened using a spanner and a wrench, the annular jacket 110 is gradually tightened, and the sealing member 200 is strongly connected to the seam of the pipe and its surroundings. Compresses and prevents leaking of fluid that is transported through the pipe.

As described above, when tightening the annular jacket 110 with a spanner and a wrench, the inner surface 312 of the bolt head 310 and the contact surface 425 of the support bar 400 are in intimate contact without a gap in the space, and the sleeve One surface of the washer 320 and the contact surface 427 of the other support bar 415 also close contact without gaps of space, even if a strong fastening force is applied, there is no loss of fastening force, even if it is fastened for a long time does not cause deformation of the contact surface Tightening force is maintained for a long time. On the other hand, even when the sleeve washer 320 is interposed on the bolt head 310 side, one surface of the nut 330 and the contact surface 425 of the support bar 400 are also in intimate contact without gaps so that there is no loss of fastening force. do.

That is, the outer diameter D1 of the bolt head 310 and the outer diameter D1 of the contact surfaces 425 and 427 formed on the support rods 400 and 415 correspond to the outer diameter d of the bolt body 340 and the contact surface 425. Since the inner diameter (D3) of the coincidence is matched, the outer diameter (D1) of the sleeve washer 320 and the outer diameter (D1) of the contact surface (427) formed on the support bar 415 of the other side coincides, the sleeve washer Since the inner diameter (d) of the 320 and the inner diameter (D3) of the contact surface is matched to be made, there is no part that does not contact in the contact between the surface and all the fastening force is transmitted to the support rods (410, 415) And the same pressure acts on the contact surfaces 425 and 427 so that deformation does not occur, thereby strongly tightening the jacket 110 so that the sealing member 200 may be pressed on the outer periphery of the pipe 500 for a long time.

On the other hand, there is a fine play between the bolt body 340 inserted by the inclined portion 430 formed in the insertion hole 417 opposite the protrusion 420 and the end of the insertion hole 410, with this clearance Due to this, even if the bolt 300 is not adjusted to the correct position, the bold body 340 can be smoothly inserted into the insertion hole 410, and the bolt body 340 smoothly vibrates even when the pipe is vibrated due to the fluid being vibrated. Since the corresponding insertion hole (410, 417) or the contact surface 425 is not damaged.

Although one embodiment of the present invention has been described above, the present invention is not limited only to the above-described embodiments, but may be modified and modified without departing from the spirit of the technical idea of the present invention. It is to be understood that the applied technical idea falls within the scope of the following claims.

As described above, in the present invention, the inner surface of the bolt head, the sleeve washer, and the contact surface formed on the nut and the support bar are matched so that there is no contact part during the surface contact, so that all the clamping force generated by the bolt and the nut are transmitted to the support bar. There is an effect, the same pressure acts on the contact surface there is an effect that the deformation does not occur and thereby there is a remarkable effect that the fastening force does not fall even if fastened for a long time. In addition, due to the inclined surface formed in the insertion hole, the bolt can be inserted smoothly, and can flexibly cope with the vibration of the pipe, there is an effect that the insertion hole or the contact surface is not damaged.

Claims (3)

It is related to the pipe coupling which is installed in the part where two pipes are connected and prevents water leakage, An annular jacket surrounding the pipe; A sealing member inserted in close contact with the inner circumferential surface of the jacket; Receptacles formed by folding both ends of the jacket outwardly and provided with a slit through which the bolt body can pass; And an insertion hole interposed between the receiving portion and the insertion hole for inserting the bolt, the support rod for supporting the inserted bolt head and the sleeve washer and nut fitted to the bolt; An inner surface of the supporting rod insertion hole is partially protruded to an outer circumference of the supporting rod to form a protrusion having a contact surface having a predetermined thickness; An inner edge of the bolt head, the sleeve washer and the contact surface formed in the nut and the support rods to ensure a fastening force is maintained edgeless type pipe coupling. The method of claim 1, Edge coupling type pipe coupling is maintained in the clamping force is characterized in that the end of the insertion hole formed on the opposite side of the support bar further comprises an inclined portion of the inner diameter gradually increases toward the outer periphery of the support rod. delete

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