KR20160115638A - Pipe clamp apparatus - Google Patents

Abstract

A clamping device for piping according to the present invention comprises: a coupling unit configured to seal a gap between a first flange and a second flange by pressing the first flange and the second flange; a screw fastening unit rotationally provided at one side of the coupling unit, and fastening the coupling unit in a direction that presses the first flange and the second flange; and a screw loosening prevention unit configured to pivot on one side of the coupling unit and move in parallel with a fastening direction of the screw fastening unit to prevent the screw fastening unit from being loosened.

Description

[0001] PIPE CLAMP APPARATUS [0002]

The present invention relates to a clamping device for a piping which is capable of removing a pipe or repairing a joint part while maintaining the sealing of the pipe joint part.

The clamping device for piping is a component for connecting piping and piping, and the type may be different depending on the shape and structure of piping to be connected. For example, if a pipe has a flange, the clamping device for the pipe is designed so that the flange of the pipe to be connected to the flange can be brought into contact with each other and exert a force in the direction of mutual close contact.

O-rings and gaskets are installed between the piping and the piping. These parts may also be aged or damaged depending on the passage of time or conditions of use, which may cause a leak. Leaks in piping used in vacuum systems make it difficult to control the vacuum required for the process, cause defects in the product, waste energy, or raise costs. In this respect, the clamping device for piping is applied with a structure which can be easily fastened or separated so as to minimize the expansion loss by easily replacing or repairing the aged o-ring or the joint structure while maintaining the closed state stably.

Screws are used to maintain the required clamping force of the flange and flange on the clamping device for piping. On the other hand, since the screw may be loosened by vibration or the like, a design for preventing screw loosening may be applied to prevent weakening of the fastening force. However, this also makes it difficult to prevent loosening or leakage of the screws. On the other hand, even if the clamping device is strongly tightened, it may cause a leak due to vibration, breakage or aging during operation, so measures may need to be taken.

Related Preceding Documents:

1. "Clamping device for piping connection" disclosed in Korean Patent No. 10-1200719 (published on Nov. 12, 2012)

2. "Piping Connection Leakage Inspection Apparatus" disclosed in Korean Patent Laid-Open Publication No. 10-2014-0015935 (published on Apr. 21, 2014)

SUMMARY OF THE INVENTION It is an object of the present invention to provide a clamping device for a pipe which can prevent unfastening of a fastening screw for sealing by a simple operation.

Another object of the present invention is to provide a clamping device for piping that can detect leak occurring in a joint of a pipe.

According to an aspect of the present invention, there is provided a clamping device for piping in accordance with the present invention, comprising: a coupling unit configured to seal between a first flange and a second flange by pressing a first flange and a second flange; A screw fastening unit rotatably provided at one side of the coupling unit and fastening the coupling unit in a direction urging the first flange and the second flange; And a screw loosening prevention unit configured to pivot on one side of the coupling unit and to move in parallel with a fastening direction of the screw fastening unit to prevent the screw fastening unit from being loosened.

As an example related to the present invention, the coupling unit may include: a first coupler formed to surround one side of the first flange and the second flange; A second coupler formed to cover the other side of the first flange and the second flange; And a coupler hinge rotatably connecting the second coupler to the first coupler.

In one embodiment of the present invention, a first coupler extension part is formed at one end of the coupling unit, a second coupler extension part is formed at the other end of the coupling unit, and the screw coupling unit is connected to the first coupler extension part And an opening slot may be formed in the second coupler extension portion so that the screw fastening unit can be hooked.

According to an embodiment of the present invention, the screw fastening unit may include: a hinge connection portion rotatably connected to the first coupler extension portion; An adjustment screw extending from the hinge connection and configured to pass through the open slot; And a nut portion coupled to the adjustment screw portion and configured to press the second coupler extension portion against the first coupler extension portion.

According to an embodiment of the present invention, a sliding hinge is provided at one end of the coupling unit, and the screw unlocking unit includes a yoke portion having both ends hung on the slide hinge and rotatable; A guide formed to be capable of restraining the slide hinge and movably guiding the yoke relative to the slide hinge; And a yoke head which is formed at one end of the yoke and has a loosening preventing groove formed to allow the nut to pass therethrough and to block rotation of the nut.

As an example related to the present invention, the guide may be formed in a slot shape parallel to the adjustment screw portion.

In one embodiment of the present invention, the unlocking groove-shaped portion is formed by combining a clearance between the slide hinge and the guide to form a plurality of circumferentially arranged As shown in FIG.

As an example related to the present invention, the piping clamp device may further include a fixing screw formed to be fastened to the yoke head, the fixing screw being capable of fixing the yoke to the nut portion.

According to an embodiment of the present invention, the clamping device for piping includes an O-ring disposed between the first flange and the second flange to seal the first flange and the second flange; And a leak detection unit configured to detect a leak generated through the O-ring.

In one embodiment of the present invention, the leak detection unit may include a cover ring formed on an outer side of the O-ring so as to seal a space between the O-ring and the first flange and the second flange, ; A cylinder portion attached to one side of the coupling unit, the cylinder portion being connected to the through hole by a tube and having a movable member that moves according to a change in pressure of the space between the O-ring and the first flange and the second flange; And a switch which is turned on and off by movement of the movable member.

As an example related to the present invention, the pipe clamp device may include: a first seal disposed between the outer circumferential surface of the first flange and the cover ring; And a second seal disposed between the second flange and the outer circumferential surface of the cover ring.

As an example relating to the present invention, the coupling unit may further include a through hole formed to allow the tube to pass therethrough.

As an example related to the present invention, the cylinder portion may include a first pipe and a second pipe, the first pipe, the second pipe, and the second pipe, A first port through which the tube is connected; And a second port through which the tube is connected to sense the leakage from the space between the O-ring and the first flange and the second flange into the internal space of the first pipe and the second pipe have.

The present invention also relates to an o-ring which is disposed between a first flange and a second flange and seals between the first flange and the second flange; A coupling unit surrounding the first flange and the second flange; and a threaded fastening unit coupled to the coupling unit to press the first flange and the second flange; And a leak detection unit formed to detect leakage generated through the O-ring.

According to the clamping device for piping in accordance with the present invention, the flange of the pipe wrapped by the coupling unit is fastened by the screw fastening unit to obtain the sealed state. On the one side of the coupling unit, It is possible to prevent the screw tightening unit from loosening by means of the screw loosening preventing unit which is moved in parallel, and it is possible to minimize the occurrence of leakage through the simple structure and to prevent the tightening force from being deteriorated.

According to another embodiment of the present invention, the leak detection unit is additionally provided in the piping clamp device, so that the occurrence of leakage due to breakage or deterioration in the O-ring can be immediately detected, and thus the expansion loss can be minimized.

1 is an exploded perspective view of a piping system to which a clamping device 100 for piping according to the present invention can be applied.
Fig. 2 is a cross-sectional view of a clamping device 100 for a pipe according to the present invention,
FIG. 3 is a perspective view of the clamp assembly 200 after partially engaging the first flange 102 and the second flange 104 after the first flange 102 and the second flange 104 are butted in FIG. State diagram
Figure 4 is an exploded view of the clamp assembly 200 shown in Figure 3 in an operative state showing a state in which the first flange 102 and the second flange 104 are completely filled.
FIG. 5 is an operational state diagram showing that the coupling unit 210 is tightened using the screw fastening unit 230 in FIG.
Fig. 6 is an explanatory view showing an operation state diagram showing a preparation state for fixing the screw fastening unit 230 by rotating the screw loosening prevention unit 240 in Fig.
7 is an explanatory view showing the operation state of the screw fastening unit 230 in a state where the screw fastening unit 240 is lowered in the state of FIG.
8 is an operational state view showing the state in which the yoke portion 241 is fixed so as not to move using the fixing screw 250 in the state of FIG.
Fig. 9 is an operational state diagram showing that the yoke portion 241 is fixed so as not to be separated by using the retainer 235 in the state of Fig. 8
10 to 12 are conceptual cross-sectional views illustrating the operation of the leak sensing unit 300 related to the present invention

Hereinafter, a clamping apparatus 100 for a pipe according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is an exploded perspective view of a piping system to which a piping clamping apparatus 100 according to the present invention can be applied, and FIG. 2 is a cross-sectional view of a piping clamping apparatus 100 according to the present invention assembled to a flange.

The clamping device 100 for piping clamps the first flange 102 of the first pipe 101 and the second flange 104 of the second pipe 103 by the clamp assembly 200, 102) and the second flange (104). The internal space of the first pipe 101 and the second pipe 103 may be a passage connecting between the chamber and the pump to obtain a desired vacuum in the vacuum system. It is necessary that the gap between the first flange 102 and the second flange 104 does not permeate the outside air when the internal space of the first pipe 101 and the second pipe 103 is a vacuum lower than atmospheric pressure, On the other hand, when the inner space of the first pipe 101 and the second pipe 103 requires a higher pressure than the surrounding space, a gap between the first flange 102 and the second flange 104 needs to be prevented from leaking . The fluid moving through the inner space of the first pipe 101 and the second pipe 103 may be gas or liquid.

A cover ring 110, an inner ring 120 and an O-ring 130 may be provided between the first flange 102 and the second flange 104. The first flange 102 and the second flange 104 are brought into contact with the O-ring 130 on opposite sides. The O-ring 130 is formed of a flexible material such as rubber or a resin material, and the gap between the first flange 102 and the second flange 104 is substantially sealed by the O-ring 130. The inner ring 120 may have a groove 121 on the outer circumference so as to hang the O-ring 130. The inner ring 120 may also have a constant thickness to function as a spacer that maintains the spacing between the first flange 102 and the second flange 104 when pressurized by the clamp assembly 200. The cover ring 110 is provided to provide a space for sealing the outer side of the O-ring 130 in order to detect a leak due to damage or deterioration of the O-ring 130. [ The construction and operation of the covering 110 will be described in detail later.

The clamp assembly 200 includes a coupling unit 210 formed to surround the first flange 102 and the second flange 104 and a screw coupling unit 210 configured to fasten the coupling unit 210 230 and a screw loosening preventing unit 240 configured to prevent loosening of the screw fastening unit 230. [

The coupling unit 210 is constructed so as to simultaneously enclose the first flange 102 and the second flange 104 so as to exert a force in a direction in which the first flange 102 and the second flange 104 are gathered . The coupling unit 210 may comprise one or more coupler elements. FIG. 1 includes two coupler elements, that is, a first coupler 211 and a second coupler 212 connected to the first coupler 211 by a coupler hinge 215. Specifically, the first coupler 211 is formed to cover one side of the first flange 102 and the second flange 104, and the second coupler 212 is formed to cover the first flange 102 and the second flange 104 104, respectively. The first coupler 211 and the second coupler 212 are rotated by the coupler hinge 215 so as to be open and closed to be closed. However, instead of using the coupler hinge 215, the first coupler 211 and the second coupler 212 may be assembled with other coupling elements, for example, screws. The coupler hinge 215 may also be excluded from the configuration and in this case the first coupler 211 and the second coupler 212 may be in the form of an interlocking (e.g., hook-like) have.

A first coupler extension part 221 is formed at one end of the first coupler 211 and a second coupler extension part 222 is formed at one end of the second coupler 212. The first coupler extension part 221 is provided with a screw coupling unit 230 for coupling the second coupler 212 to the first coupler 211. The second coupler extension portion 222 serves as a mating member for fastening the screw fastening unit 230. The second coupler extension part 222 is formed with an open slot 223 through which one element of the screw fastening unit 230 can pass.

The screw fastening unit 230 includes a hinge connection portion 231 rotatably connected to the first coupler extension portion 221 and an adjustment screw portion 231 extending from the hinge connection portion 231, 232 and a nut portion 233 screwed to the adjustment screw portion 232. [ The nut portion 233 is fastened to the adjusting screw portion 232 so as to press the second coupler extension portion 222 against the first coupler extension portion 221 and, Can be separated from the first coupler extension part (221).

The screw loosening prevention unit 240 is fixed to the nut portion 233 so as to prevent the nut portion 233 from being loosened in a state where the screw fastening unit 230 fastens the first coupler 211 and the second coupler 212, As shown in FIG. The first coupler extension part 221 may be provided with a slide hinge 225 so that the screw loosening prevention unit 240 can be installed. The slide hinge 225 may use a common axis with the hinge connection portion 231 or may use different axes. Figure 1 shows the former.

The screw loosening preventing unit 240 includes a yoke portion 241 formed at both ends of the slide hinge 225 so as to be rotatable by being hung on the slide hinge 225 and a yoke portion 241 formed so as to confine the slide hinge 225, A yoke head 243 having a guide groove 242 for movably guiding the nut portion 231 and an unlocking groove shaped portion 245 for preventing rotation of the nut portion 233 while passing the nut portion 233, . The unlocking groove-shaped portion 245 is combined with a clearance between the slide hinge 225 and the guide 242 so that the nut 233 can be passed through the periphery And may have a plurality of flutes arranged in the direction of the arrow. The nut portion 233 is fixed to the guide 242 so that the nut portion 233 can be caught by the unlocking groove-shaped portion 245 at any position of the yoke head 243 moved by the guide 242 in the fastening direction of the adjusting screw portion 232 May have a corresponding length.

The slide hinge 225 supports the yoke 241 so as to be rotatable. The guide 242 may be formed in a slot shape parallel to the direction of the adjustment screw portion 232. The guide 242 allows the yoke 241 to have various positions relative to the slide hinge 225. The yoke head 243 is provided with a fixing screw 250 for fixing the yoke portion 241 to the nut portion 233 so as to prevent the yoke portion 241 from being arbitrarily moved by the guide 242 .

The clamping apparatus 100 for piping may include a leak sensing unit 300 capable of sensing a leak occurring in a gap between the first flange 102 and the second flange 104. [ 1 and 2, the leak sensing unit 300 includes the covering unit 110 and the cylinder unit 340 and the switch 350 attached to one side of the coupling unit 210.

The cover ring 110 is formed to seal the space between the O-ring 130 and the first flange 102 and the second flange 104 from the outside of the O-ring 130, and a through hole 112 is formed at one side . The covering 110 may be formed in a size that is not interfered by the tightening of the coupling unit 210. A first sealing ring 114 is provided between the first flange 102 and the outer peripheral surface of the covering ring 110 and between the second flange 104 and the outer peripheral surface of the covering ring 110, A second sealing 115 may be provided.

The cylinder portion 340 is connected to the through hole 112 of the cover ring 110 by a tube 311. The tube 311 may be provided with a connection part 310 to be connected to the through hole 112 of the covering 110. The coupling unit 210 may be formed with a through hole 213 through which the tube 311 can pass.

The cylinder portion 340 is connected to the through hole 112 by the tube 311 and moves in accordance with the pressure change of the space between the O-ring 130 and the first flange 102 and the second flange 104, (341). The cylinder portion 340 is connected to the first pipe 101 and the second pipe 103 through the O-ring 130 and the first flange 102, which are in communication with the inner space P1 and the tube 311, When the pressure difference in the space P2 between the second flanges 104 occurs, the movable member 341 moves. The moved movable member 341 contacts the contact 351 of the switch 350 to turn the switch 350 on and off to generate an electrical signal through the cable 352 to the system. The cylinder portion 340 may be attached to the clamp assembly 200 or fixed to another member of the pipe in the mounting position. In this example, the former case is shown.

The cylinder portion 340 may include a first port 320 and a second port 330 so as to detect a leak in both the high pressure state and the low pressure state. The first port 320 is connected to the first flange 102 and the second flange 104 by a leakage from the internal space of the first pipe 101 and the second pipe 103 to the space between the O-ring 130 and the first flange 102 and the second flange 104 And the second port 330 moves from the space between the O-ring 130 and the first flange 102 and the second flange 104 to the inner space of the first pipe 101 and the second pipe 103 It detects the incoming leak.

As described above, the leak sensing unit 300 is simply combined with the clamp assembly 200 to prevent leakage by an easy operation, and when a leak occurs, the leak sensing unit 300 senses the leakage immediately and provides a signal. Therefore, .

Hereinafter, the operation of the clamping device 100 for piping according to the present invention will be described.

FIG. 3 is a perspective view of the clamp assembly 200 after partially engaging the first flange 102 and the second flange 104 after the first flange 102 and the second flange 104 are butted in FIG. State diagram. Since the clamp assembly 200 is formed in a ring shape and can be opened and closed, the clamp assembly 200 can be easily operated even in a narrow space in which the pipe is installed.

4 is an operational state view showing the clamp assembly 200 completely filled in the first flange 102 and the second flange 104 in FIG. The second coupler 212 is disposed on the other side of the first flange 102 and the second flange 104 in a state in which the first coupler 211 surrounds the first flange 102 and one side of the second flange 104, The first coupler extension part 221 and the second coupler extension part 222 are brought into a position for mutual engagement.

5 is an operating state diagram showing that the coupling unit 210 is tightened using the screw fastening unit 230 in FIG. 4. When the screw fastening unit 230 is rotated to fasten the nut portion 233, So that the first coupler extension part 221 is fastened to the first coupler extension part 221. At this time, the inner surfaces of the first coupler 211 and the second coupler 212 press the surfaces of the first flange 102 and the second flange 104 in the vertical direction, The first flange 102 and the second flange 104 are urged toward each other.

6 is an operational state view showing a ready state for fixing the screw fastening unit 230 by rotating the screw loosening preventing unit 240 in Fig. After the screw fastening unit 230 is fastened with sufficient fastening force, the nut portion 233 is prevented from being loosened through the screw loosening preventing unit 240. [ To this end, the screw loosening preventing unit 240 is rotated with respect to the slide hinge 225 so that the unlocking groove-shaped portion 245 of the yoke head 243 and the nut portion 233 are vertically aligned.

7 is an operational state diagram showing a state in which the screw tightening unit 230 is fixed by lowering the screw loosening preventing unit 240 in the state of FIG. The nut 233 can be inserted into the screw loosening prevention unit 240 by the guide 242 and the unlocking groove-shaped portion 245. [ Since the unlocking groove-shaped portion 245 can prevent rotation of the nut portion 233 instead of passing the nut portion 233, even if the nut portion 233 is inserted into the yoke head 243, do. The nut portion 233 is caught by the unlocking groove-shaped portion 245 at any fastening position by a sufficient length corresponding to the guide 242. [ Therefore, the screw fastening unit 230 fastened to the coupling unit 210 is effectively prevented from being loosened by the screw loosening preventing unit 240. [

8 is an operational state view showing that the yoke portion 241 is fixed so as not to move using the fixing screw 250 in the state of FIG. The yoke head 243 is fixed to the nut portion 233 by tightening the set screw 250 so that the yoke head 243 does not come off from the nut portion 233 due to vibration or an external force. Accordingly, it is possible to prevent the screw loosening prevention unit 240 from arbitrarily interrupting or stopping the function.

9 is an operational state view showing that the yoke portion 241 is fixed so as not to be separated by using the retainer 235 in the state of FIG. When the clamp assembly 200 is assembled in an inverted state, the yoke portion 241 may be disengaged from the adjusting screw portion 232 due to its own weight when the fastening screw 250 is assembled in a relaxed or unfastened state. For this purpose, the retainer 235 can be fastened to the adjustment screw portion 232. At this time, the retainer 235 may be formed as a butterfly screw or pin or a snap ring having a larger diameter or size than the release preventing groove-shaped portion 245. Figure 9 shows a retainer 235 formed in the form of a double butterfly screw.

10 to 12 are conceptual sectional views for explaining the operation of the leak sensing unit 300 related to the present invention.

10 shows a state in which leakage occurs from the internal space of the first pipe 101 and the second pipe 103 to the space between the O-ring 130 and the first flange 102 and the second flange 104 in the state of FIG. . The pressure in the tube 311 is increased due to the leak so that the cylinder 340 is operated to move the movable member 341 and contact the contact 351 to operate the switch 350.

11 shows a state in which the tube 311 is connected to the second port 330. FIG. A vacuum is applied to the inner space of the first pipe 101 and the second pipe 103 and the air is discharged from the space between the O-ring 130 and the first flange 102 and the second flange 104 through the O- 12, the cylinder portion 340 is operated to move the movable member 341 upward, and the contact 351 is moved to the upper portion of the second pipe 103 The pushing state is released and the switch 350 is operated. The movable member 341 may be configured to be moved by the pressure applied to the cylinder 340 or may be moved by the restoring force of a spring (not shown) provided in the cylinder 340.

As described above, the sealing of the flange and the flange can be stably managed by the clamping device 100 for piping in accordance with the present invention, and it is possible to take an immediate action by detecting occurrence of leakage.

The clamping device for piping as described above is not limitedly applied to the construction and the method of the illustrated embodiments. The embodiments may be configured so that all or some of the embodiments may be selectively combined so that various modifications may be made.

100: Clamping device for piping 101: First piping
102: first flange 103: second piping
104: second flange 110: covering
112: through hole 114: first sealing
115: second sealing 120: inner ring
130: O-ring 200: Clamp assembly
210: coupling unit 211: first coupler
212: second coupler 215: coupler hinge
221: first coupler extension part 222: second coupler extension part
230: screw fastening unit 231: hinge connection
232: adjusting screw portion 233: nut portion
240: screw loosening preventing unit 241: yoke part
242: guide 243: yoke head
245: Loosening preventing groove 300: Leak detection unit
310 connection 311 tube
320: first port 330: second port
340: cylinder 350: switch

Claims (9)

An O-ring disposed between the first flange of the first pipe and the second flange of the second pipe facing each other to seal between the first flange and the second flange;
A coupling unit surrounding the first flange and the second flange;
A screw fastening unit fastened to the coupling unit to press the first flange and the second flange;
A cover ring formed on an outer side of the O-ring so as to seal a space between the O-ring and the first flange and the second flange, and having a through hole at one side thereof;
A first seal disposed between the outer periphery of the first flange and the cover ring;
A second seal disposed between the outer periphery of the second flange and the cover ring;
A cylinder portion attached to one side of the coupling unit, the cylinder portion being connected to the through hole by a tube and having a movable member that moves according to a change in pressure of the space between the O-ring and the first flange and the second flange; And
And a switch that is turned on and off by movement of the movable member.
The method according to claim 1,
Wherein,
A first port through which the tube is connected so as to sense leakage from the internal space of the first pipe and the second pipe to the space between the O-ring and the first flange and the second flange; And
And a second port to which the tube is connected so as to sense leakage from the space between the O-ring and the first flange and the second flange to the inner space of the first pipe and the second pipe, Clamping device.
The method according to claim 1,
The coupling unit includes:
Further comprising a through hole formed to allow said tube to pass therethrough.
The method according to claim 1,
The coupling unit includes:
A first coupler formed to surround one side of the first flange and the second flange;
A second coupler formed to cover the other side of the first flange and the second flange; And
And a coupler hinge rotatably connecting the second coupler to the first coupler.
5. The method of claim 4,
Wherein the screw-
A hinge connection portion rotatably connected to the first coupler extension portion;
An adjustment screw extending from the hinge connection and configured to pass through the open slot; And
And a nut portion coupled to the adjustment screw portion and configured to press the second coupler extension portion against the first coupler extension portion.
The method according to claim 1,
Further comprising a screw loosening prevention unit configured to pivot on one side of the coupling unit and to move in parallel with a tightening direction of the screw tightening unit to prevent loosening of the screw tightening unit.
The method according to claim 1,
And said cylinder portion is configured to be able to operate said switch when said O-ring has a vacuum leak into said first pipe and said second pipe internal space.
The method according to claim 1,
Wherein the cylinder portion moves in opposite directions when the O-ring leaks a vacuum in the first piping and the second piping inner space and when the pressure in the first piping and the second piping inner space leak, The clamping device for piping being formed to be operable.
The method according to claim 1,
And an inner ring having an outer circumferential groove so as to be able to hang the O-ring is further provided inside the O-ring.

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