KR101681746B1

KR101681746B1 - High Strength Clamp

Info

Publication number: KR101681746B1
Application number: KR1020150074609A
Authority: KR
Inventors: 한규진; 한규현
Original assignee: (주)나린테크
Priority date: 2015-05-28
Filing date: 2015-05-28
Publication date: 2016-12-02

Abstract

A high strength clamp is disclosed. The present invention comprises: a first clamp main body having a semi-circular shape, the first inner circumferential surface, the first outer circumferential surface, and a first inner surface; a second clamp main body having a semi-circular shape, the second inner circumferential surface, the second outer circumferential surface, and a second inner surface; a fastening bar coupled to be rotated in the center axis direction to an upper end of the first clamp main body; and a fastening nut where the fastening bar is coupled, coupled to an upper end of the second clamp main body. The fastening bar is coupled to the fastening nut while rotating around a center shaft to fasten the first clamp main body and the second clamp main body.

Description

{High Strength Clamp}

The present invention relates to a high strength clamp used for connecting piping such as vacuum piping or gas piping.

Pipes such as vacuum piping or gas piping used in manufacturing lines such as semiconductor manufacturing lines are connected by a clamp coupled to a piping flange formed at the end of the piping. The clamps are respectively engaged with the ends of the two pipes, and after the mutually facing pipe flanges are brought into contact with each other, uniform force is applied in the circumferential direction to seal between the vacuum pipes.

The conventional clamp is formed to have a circular shape by coupling the first clamp body and the second clamp body which are semicircular in shape. One end of the first clamp main body and the second clamp main body are rotatably coupled to each other. A clamping bar is rotatably coupled to the other end of the first clamp main body and a clamping groove is formed at the other end of the second clamp main body. The fastening bar is pivoted about the other end of the first clamp and fastened to the fastening groove formed at the other end of the second clamp. Therefore, the clamp requires a space necessary for the fastening bar to rotate in order to fasten the fastening bar to the fastening groove.

Since the pipelines are generally installed with a narrow space therebetween, it is difficult to secure a space for rotating the fastening bars, and it is not easy to fasten the clamps to the piping. Further, since the clamp has to rotate the nut of the fastening bar after fastening the fastening bar to the fastening groove, a space for using the wrench is required. Further, since the clamp is fastened by a spanner in a narrow space, the clamping force is weakened. In addition, the clamp has a problem that the fastening force is lowered because the nut is coupled to the fastening groove together with the washer, but is released by the vibration transmitted through the pipe or the like.

It is an object of the present invention to provide a high-strength clamp which is easy to fasten, minimizes a space for fastening, increases clamping force and prevents loosening of the vacuum pipe due to vibration.

The high-strength clamp of the present invention is formed in a semicircular shape, and has a first clamp main body having a first inner peripheral surface, a first outer peripheral surface, and a first inner surface, and a second clamp main body formed in a semicircular shape and having a second inner peripheral surface, a second outer peripheral surface, A clamping bar rotatably coupled to an upper end of the first clamping body and a clamping nut coupled to an upper end of the second clamping body, wherein the clamping bar rotates around a central axis And the first clamp body and the second clamp body are screwed together with the clamping nut.

The high-strength clamp may further include a ball plunger coupled to the fastening bar to prevent the fastening bar from being disengaged, wherein the first fastening body has a central axis extending perpendicularly to the first inner surface, A first fastening groove formed in an inner surface of the first fastening inner surface and having a first fastening bottom surface and a first fastening inner surface; a first fastening hole formed through the first fastening inner surface to the first inner surface; And a plunger groove formed on a bottom surface of the second clamp body and coupled to the ball plunger, wherein the second clamp body is formed in a direction from the second outer circumferential surface to the second inner surface so that the central axis direction is perpendicular to the second inner surface A second fastening groove having a second fastening bottom surface and a second fastening inner surface, and a second fastening groove penetrating from the second fastening inner surface to the second inner surface And a fixing hole penetrating through the second fastening groove on the front surface or the rear surface of the second clamp main body, wherein the fastening bar is coupled to the first fastening groove and the first fastening hole, The fastening nut may be coupled to the second fastening hole and the second fastening hole.

The fastening bar may have a head portion having a fixing groove into which a rotary tool is inserted, a body portion formed at one side of the head portion and having a plunger engagement groove on an outer circumferential surface thereof, The fastening nut includes a threaded hole in which the threaded portion is engaged, a nut fastening groove formed in a position corresponding to the fastening hole, and a threaded portion formed in the fastening hole, And a fixing pin including a nut stepped portion formed in a side surface thereof and inserted into the second fastening hole, the fixing pin passing through the fastening hole and being coupled to the nut fixing groove. The ball plunger may include an elastic means coupled to the plunger hole and a coupling ball coupled to the elastic means and coupled to the plunger coupling groove by an elastic force.

The first clamp body further includes a stopper hole penetrating through the first fastening groove on the front surface or the rear surface of the first clamp body. The fastening bar is formed on the outer peripheral surface of the body, between the plunger engagement hole and the screw, And a stopper groove formed in a ring shape having a predetermined width along an outer circumferential surface in a region corresponding to the stopper groove, and a stopper coupled to the stopper groove through the stopper hole.

The fastening bar may include a stopper groove formed in a ring shape having a predetermined width along an outer circumferential surface in a region where the plunger groove is formed on an outer circumferential surface of the body, and a plunger engaging groove formed on the other side in the stopper groove The ball plunger is coupled to the stopper groove, and may be coupled to the plunger engagement groove after the first clamp body and the second clamp body are coupled.

The high-strength clamp may be formed so that the central axis of the fastening bar and the central axis of the fastening hole of the fastening nut coincide after the fastening bar and the fastening nut are coupled.

The high-strength clamp of the present invention has an effect that the fastening bar is fastened to the fastening nut while fastening the fastening bar in the axial direction so that it can be fastened even in a narrow space between the vacuum piping.

Further, the high-strength clamp according to the present invention has an effect of increasing the fastening force and shortening the fastening time by inserting a tool such as a hexagon wrench into the fastening hole formed at the rear end of the fastening bar to join the fastening bar.

Further, since the fastening bar is fixed by the ball plunger, the high-strength clamp of the present invention has an effect of preventing the clamp from loosening due to the vibration of the vacuum pipe.

1 is a front view of a high strength clamp according to an embodiment of the present invention.
2 is a side view of the first clamp main body of Fig.
3 is a side view of the second clamp body of Fig.
4 is a cross-sectional view taken along line AA of FIG.
5 is a cross-sectional view of BB of Fig.
6 is a cross-sectional view of FIG. 1 for a position corresponding to CC in FIG.
7 is a front view of a high strength clamp according to another embodiment of the present invention.
Fig. 8 is a front view of the high-strength clamp of Fig. 1 before fastening. Fig.
Fig. 9 is a front view of the high-strength clamp shown in Fig. 1 immediately after the start of fastening;
Fig. 10 is a front view of the high-strength clamp of Fig. 1 after completion of the fastening. Fig.

Hereinafter, the high-strength clamp according to the present invention will be described in more detail with reference to embodiments and accompanying drawings.

First, a high-strength clamp according to an embodiment of the present invention will be described.

1 is a front view of a high strength clamp according to an embodiment of the present invention. 2 is a side view of the first clamp main body of Fig. 3 is a side view of the second clamp body of Fig. 4 is a cross-sectional view taken along line AA of FIG. 5 is a cross-sectional view of BB of Fig. 6 is a cross-sectional view of FIG. 1 for a position corresponding to CC in FIG.

1 to 6, a high-strength clamp 100 according to an exemplary embodiment of the present invention includes a first clamp body 110, a second clamp body 120, a connection bar 130, and a fastening bar 140 A fastening nut 150, and a ball plunger 160. As shown in FIG. The high-strength clamp 100 may further include a stopper 170.

The first clamp main body 110 and the second clamp main body 120 have a semicircular shape in the front face, and the lower ends thereof are coupled to the connecting bar 130 so as to be rotatable about the lower end. The first clamp main body 110 and the second clamp main body 120 are connected to each other by a fastening bar 140 and a fastening nut 150,

The high strength clamp 100 is coupled to the clamping nut 150 while the clamping bar 140 rotates around the central axis of the clamping bar 140 so that the first clamping body 110 and the second clamping body 120 are fastened Therefore, a relatively small space is required to fasten the clamp as compared with the conventional clamp. Since the fastening bar 140 and the fastening nut 150 are fastened together by the screwing method, the fastening force of the high-strength clamp 100 is increased.

Also, since the fastening bar 140 of the high strength clamp 100 of the present invention is coupled to the fastening nut 150 while being rotated by a rotary tool such as a hexagon wrench, fastening is easy and fastening time can be shortened. The rotary tool may be various tools capable of rotating a bolt-type fastening bar 140 such as a hexagonal wrench, a hexagonal trench, or a power tool.

In the high-strength clamp 100 of the present invention, since the fastening bar 140 is fixed by the ball plunger 160, loosening by vibration introduced from a vacuum pipe or a gas pipe is prevented, and the fastening force can be maintained.

In the following description, the inner circumferential surface means a surface of a region where the first clamp main body 110 and the second clamp main body 120 are formed in an arc shape in the direction opposite to each other and to which a pipe flange (not shown) The outer circumferential surface means a surface opposite to the inner surface. The inner surface of the first clamp main body 110 and the second clamp main body 120 are planar in a direction in which the first clamp main body 110 and the second clamp main body 120 face each other and mean a surface of a region where the connection bar 130 and the fastening bar 140 are coupled. In addition, the front and back surfaces refer to surfaces in a direction perpendicular to the inner surface. The lower end of the first clamp main body 110 and the second clamp main body 120 are connected to each other by the connection bar 130 with reference to FIG. 2 means the end of the clamp body 120 which is fastened by the fastening bar 140 and the fastening nut 150. The upper and lower ends may be reversed.

The first clamp main body 110 includes a first inner circumferential groove 111 and a first connection groove 112 and a first connection hole 113 and a first connection groove 114 and a first connection hole 115, Grooves 116 are formed. The first clamp main body 110 may further include a stopper hole 117 and a first contact buffer groove 119.

The first clamp body 110 is formed in a semicircular shape, and the overall shape of the first clamp body 110 is the same as or similar to that of the conventional clamp. The first clamp body 110 is formed with a first inner circumferential surface 110a, a first outer circumferential surface 110b, and a first inner surface 110c. The first clamp body 110 is formed of a corrosion-resistant material such as stainless steel.

The first inner circumferential groove 111 is formed in a trench shape having a predetermined width and depth along the circumferential direction at the first inner circumferential surface 110a of the first clamp body 110. The first inner circumferential groove 111 provides a space in which the outside of the pipe flange of the two pipes coupled to each other is accommodated. Accordingly, the first inner circumferential groove 111 is formed in a shape corresponding to the outer shape of the pipe flange which is coupled opposite to each other.

The first connection groove 112 is formed in a groove shape which is opened by the first inner surface 110c and the first outer circumferential surface 110b of the first clamp main body 110. [ The first connection groove 112 may be formed to have a square shape when viewed from the front. The first connection groove 112 provides a space in which the other side of the connection bar 130 is received and rotated.

The first connection hole 113 is formed to penetrate from the front surface to the rear surface of the first clamp body 110 in the region where the first connection groove 112 is formed. The first connection hole 113 provides a path through which a separate first connection pin 135 for fixing the connection bar 130 passes.

The first fastening groove 114 is formed at the upper end of the first clamp main body 110 in the direction of the first inner surface 110c at the first outer circumferential surface 110b so that the central axis direction is perpendicular to the first inner surface 110c . The first fastening groove 114 is formed with a first fastening bottom surface 114a and a first fastening inner surface 114b. The first coupling groove 114 preferably has a first coupling bottom surface 114a and a central axis direction perpendicular to the first inner surface 110c of the first clamp body 110 . The first fastening groove 114 is formed so that the first fastening inner surface 114b is parallel to the first inner surface 110c of the first clamp body 110. The first fastening groove 114 provides a space through which the fastening bar 140 is received and penetrates in the direction of the second clamping body 120. Accordingly, the first fastening groove 114 is formed to have a width and a height larger than the diameter of the fastening bar 140. The first clamping groove 114 is formed in the first clamp body 110 by applying a clamping force to the first clamp body 110 while the clamping bar 140 is in contact with the first clamping inner surface 114b, So that the main body 120 is fastened. The specific coupling relationship of the first fastening groove 114 with the fastening bar 140 will be described in more detail below.

The first fastening hole 115 is formed to penetrate from the first fastening inner surface 114b of the first fastening recess 114 to the first inner surface 110c of the first clamp body 110. [ The first fastening hole 115 provides a path through which the fastening bar 140 passes. The first fastening hole 115 may have a straight portion formed between the upper semi-circular arc forming the upper part and the lower semi-circular arc forming the lower part, so that the first fastening hole 115 may have an elliptical shape as a whole. The upper semicircular arc is located on the center axis of the fastening bar 140 and the lower semicircular arc is located below the center axis of the fastening bar 140. Therefore, when the fastening bar 140 is coupled to the first fastening groove 115, the upper outer circumferential surface is adjacent to the upper semicircular arc of the first fastening groove 115, And is spaced upward from the semicircular arc. When the fastening bar 140 is fastened, it tilts in the lower semicircular arc direction and is easily fastened.

The plunger groove 116 is formed at a predetermined depth and diameter in the lower end direction from the first fastening bottom surface 114a of the first fastening groove 114. The plunger groove 116 provides a space in which the ball plunger 160 is accommodated.

The stopper hole 117 is formed through the first fastening groove 114 on the front surface or the rear surface of the first clamp body 110. The stopper hole 117 provides a path through which the pin-shaped stopper 170 passes. The stopper hole 117 may be omitted when the stopper 170 is omitted.

The release preventing tab 118 protrudes from the first engaging inner surface 114b at an upper portion of the first engaging recess 114 in a direction parallel to the first engaging bottom surface 114a. The release preventing tab 118 is formed in a circular arc shape with a lower surface of the release preventing tab 118 and a first coupling bottom surface 114b of the first coupling groove 114. The release preventing tab 118 prevents the fastening bar 140 from being detached from the first fastening groove 114 when the fastening bar 140 is moved up and down while being fastened to the fastening nut 150. The release preventing tab 118 may be omitted when the fastening bar 140 is formed so as not to be detached.

The first contact buffering groove 119 is formed in a groove shape on the inner surface of the first inner circumferential groove 111. The first contact buffering groove 119 may be formed in two or more depending on the length of the first inner circumferential groove 111. The first contact buffering groove 119 reduces the area of contact with the inner surface of the first inner circumferential groove 111 and the pipe flange, thereby increasing the tightening force of the high-strength clamp to the pipe flange.

The second clamp main body 120 includes a second inner circumferential groove 121 and a second connection groove 122 and a second connection hole 123, a second connection groove 124, a second connection hole 125, Holes 126 are formed. The second clamp main body 120 may further include a second contact buffer groove 129.

The second clamp body 120 is formed in a semicircular shape that is symmetrical with the first clamp body 110. The second clamp body 120 is formed with a second inner circumferential surface 120a, a second outer circumferential surface 120b, and a second inner surface 120c. The second clamp body 120 is formed of a corrosion-resistant material such as stainless steel.

The second inner circumferential groove 121 is formed in a trench shape having a predetermined width and depth along the circumferential direction at the second inner circumferential surface 120a of the second clamp body 120. The second inner circumferential groove 121 forms a circular groove together with the first inner circumferential groove 111 and provides a space for accommodating a pipe flange of two vacuum pipes coupled to each other.

The second connection groove 122 is formed in a groove shape which is opened to the second inner surface 120c and the second outer circumferential surface 120b of the second clamp body 120. [ The second connection groove 122 provides a space through which the other side of the connection bar 130 is received and rotated. Accordingly, the second connection groove 122 is formed so that the other side of the connection bar 130 is inserted and rotatable.

The second connection hole 123 is formed through a region of the lower surface of the second clamp body 120 where the second connection groove 122 is formed from the front to the rear. The second connection hole 123 provides a path through which a separate second connection pin (hereinafter referred to as 137) for fixing the connection bar 130 is passed.

The second fastening groove 124 is formed at the upper end of the second clamp main body 120 in the direction of the second inner surface 120a from the second outer circumferential surface 120b such that the center axis thereof is perpendicular to the second inner surface 120c. The second fastening groove 124 has a rectangular cross-sectional shape perpendicular to the axial direction, and has a second fastening bottom surface 124a and a second fastening inner surface 124b. The second fastening bottom surface 124a is perpendicular to the second inner surface 120c of the second clamp body 120 and the second fastening inner surface 124b is perpendicular to the second inner surface 120c of the second clamp body 120. [ As shown in Fig. Meanwhile, the second fastening groove 124 may have a rectangular cross section or a hexagonal cross section. The second fastening groove 124 provides a space in which the fastening nut 150 is inserted and accommodated. Therefore, the second fastening groove 124 is formed such that the width and the height of the second fastening groove 124 are larger than the width and height of the fastening nut 150.

The second fastening hole 125 is formed to penetrate from the second fastening inner surface 124b of the second fastening recess 124 to the second inner surface 120c of the second clamp body 120. The second fastening hole 125 provides a path through which one end of the fastening nut 150 passes.

The fixing hole 126 is formed to pass through the second fastening groove 124 from the front surface or the rear surface of the second clamp main body 120. The fixing hole 126 provides a path through which the pin-shaped fixing pin 127 passes.

The second contact buffering groove 129 is formed in a groove shape on the inner surface of the second inner circumferential groove 121. The second contact buffering groove 129 may be formed in two or more depending on the length of the second inner circumferential groove 121. The second contact buffering groove 129 reduces the area of contact with the inner surface of the second inner circumferential groove 121 and the pipe flange, thereby increasing the clamping force of the high-strength clamp to the pipe flange.

The connecting bar 130 is coupled to the lower end of the first clamp body 110 and the lower end of the second clamp body 120. The first clamp body 110 and the second clamp body 120 are connected to the lower end of the first clamp body 110, . The connection bar 130 is formed in a square block shape having a predetermined thickness, and one side and the other side are inserted into the first connection groove 112 and the second connection groove 122, respectively. The connection bar 130 has a first connection bar hole 131 and a second connection bar hole 133 formed on one side and the other side, respectively. The first connection bar hole 131 and the second connection bar hole 133 are connected to the first connection hole 113 and the second connection hole 123, respectively. The first connection pin 135 is coupled through the first connection hole 113 and the first connection bar hole 131 and the second connection pin 137 is connected to the second connection hole 123 through the second connection hole 131. [ And is coupled through the bar hole 133. The connection bar 130 rotates about the first connection pin 135 and the second connection pin 137.

The fastening bar 140 is formed as a bolt as a whole and may include a head 141, a body 145, and a screw 149. The fastening bar 140 is rotatably coupled to the upper end of the first clamp body 110 about a central axis. More specifically, the fastening bar 140 is inserted into the first fastening groove 114 in the direction of the central axis, and is coupled with the fastening nut 150 through the first fastening hole 115. The head 141 of the fastening bar 140 protrudes from the first outer circumferential surface 110b of the first clamp body 110 and the body 145 is inserted into the first fastening groove 114, The threaded portion 149 penetrates the first fastening hole 115 and is coupled to the fastening nut 150.

The head 141 has a hexagonal cross section perpendicular to the axial direction and may have a circular or rectangular shape. The head 141 is formed with a head groove 142 at a predetermined depth on the other side thereof and provides a space into which a rotary tool such as a hexagon wrench is inserted. The fastening bar 140 is rotated about a central axis by a rotating tool and is screwed to the fastening nut 150.

The body portion 145 has a plunger engagement groove 146 and a stopper groove 147 formed on an outer circumferential surface thereof. The other side of the body portion 145 is coupled to the head 141 and is formed integrally with the head 141. The body portion 145 is formed in a circular shape in cross section perpendicular to the center axis direction. The body portion 145 is formed to have a diameter larger than the diameter of the first fastening hole 115. Therefore, when the fastening bar 140 is coupled to the fastening nut 150, the other side of the body part 145 contacts the first fastening inner surface 114b of the first fastening recess 114, 110).

The plunger coupling groove 146 is formed at a position corresponding to the plunger groove 116 of the first clamp body 110 when the fastening bar 140 is coupled to the first clamp body 110, As shown in FIG. A plurality of the plunger engagement grooves 146 are formed at predetermined intervals in the circumferential direction of the outer peripheral surfaces. The plunger engagement groove 146 provides a space in which the ball plunger 160 is engaged. The plunger engagement groove 146 is formed in a shape corresponding to a portion where the ball plunger 160 is engaged. For example, when the joint portion of the ball plunger 160 is formed of a ball, the plunger engagement groove 146 may be formed in a hemispherical shape.

The stopper groove 147 is formed at a predetermined depth and width in an area corresponding to the stopper hole 117 of the first clamp body 110 on the outer circumferential surface of the body portion 145. The stopper groove 147 is formed in a ring shape along the outer peripheral surface. The stopper groove 147 provides a space through which the stopper 170 is inserted and coupled through the stopper hole 117. The stopper groove 147 prevents the fastening bar 140 from being separated from the first clamp main body 110 in a state where the fastening bar 140 is separated from the fastening nut 150. For this, the stopper groove 147 is formed such that the other side of the stopper groove 147 is in contact with the stopper 170 when the fastening bar 140 is separated from the fastening nut 150.

The threaded portion 149 is formed integrally with the body portion 145 and has a smaller diameter than the body portion 147. The threaded portion 149 is formed to have a smaller diameter than the diameter of the first fastening hole 115. The threaded portion 149 passes through the first fastening hole 115 and is coupled to the fastening nut 150. The threaded portion 149 is formed to have an appropriate length so that the upper ends of the first clamp body 110 and the second clamp body 120 are spaced apart from each other and can be easily coupled to the clamping nut 150. When the length of the threaded portion 149 is too short, one side of the threaded portion 149 is inserted into the other side of the clamping nut 150 when the pipe flange is positioned between the first clamp body 110 and the second clamp body 120 So that the threaded portion 149 is hardly coupled to the fastening nut 150. When the length of the threaded portion 149 is too long, the threaded portion 149 is difficult to be coupled to the clamping nut 150 in a state where the upper ends of the first clamp body 110 and the second clamp body 120 are spaced apart from each other .

The coupling nut 150 is formed to include a screw coupling hole 151, a nut fixing groove 153, and a nut stepped portion 155. The fastening nut 150 is formed as a nut having a predetermined length as a whole. The clamping nut 150 is coupled to the upper end of the second clamp body 120 and is screwed to the clamping bar 140. More specifically, the coupling nut 150 is inserted into the second coupling groove 124 and coupled with the coupling bar 140. Preferably, the outer circumferential surface of the coupling nut 150 is formed in a rectangular shape having a shape corresponding to a vertical cross-sectional shape of the second coupling groove 124 with respect to the central axis direction. Meanwhile, the fastening nut 150 may have a hexagonal shape or a circular shape depending on the vertical cross-sectional shape of the second fastening groove 124. Since the fastening nut 150 has a rectangular cross section perpendicular to the center axis direction, the fastening nut 150 is not inserted into the second fastening groove 124 and is not rotated in the process of coupling with the fastening bar 140.

The threaded hole 151 is formed to extend in the axial direction of the clamping nut 150. A screw thread is formed on the inner circumferential surface of the clamping screw so that the threaded portion 149 of the clamping bar 140 is screwed. The screw hole 151 is formed such that the center axis of the fastening bar 140 and the central axis coincide with each other after the fastening bar 140 and the fastening nut 150 are coupled.

The nut fixing groove 153 is formed at a position corresponding to the fixing hole 126 in a state where the coupling nut 150 is coupled to the second coupling groove 124. The nut fixing groove 153 provides a path through which the fixing pin 129 is coupled. Therefore, the fixing pin 129 passes through the fixing hole 126 and is rotatably coupled to the nut fixing groove 153. The clamping nut 150 is fixed by the fixing pin 129 and is not separated from the second clamp main body 120. Also, the fastening nut 150 is pivoted about the fixing pin 129 and is easily engaged with the fastening bar 140.

The nut stepped portion 155 is formed on the other side of the clamping nut 150 and the entire outer surface of the clamping nut 150 is formed to be stepped from the outer surface of the clamping nut 150 in the direction of the central axis. Further, the nut stepped portion 155 is formed to have a smaller diameter than the second fastening hole 125. Accordingly, the nut stepped portion 155 forms a stepped surface 155a between the nut stepped portion 155 and the outer peripheral surface of the fastening nut 150. [ The nut stepped portion 155 is inserted and coupled to the second fastening hole 125. The stepped surface 155a of the fastening nut 150 with the nut stepped portion 155 is brought into contact with the second fastening inner surface 124b of the second fastening groove 124. [ When the clamping nut 150 is engaged with the clamping bar 140, the clamping force is applied to the second clamping body 120 while the stepped surface 155a contacts the second clamping inner surface 124b.

The nut stepped portion 155 is formed to have a predetermined length so as to be inserted into the second fastening hole 125 and protrude from the second inner surface 120c of the second clamp body 120. The protruding length of the nut stepped portion 155 is formed to correspond to the distance between the first inner surface 110c of the first clamp body 110 and the second inner surface 120c of the second clamp body 120 . When the first clamp body 110 and the second clamp body 120 are fastened, the other side surface of the nut stepped portion 155 is in contact with the first inner surface 110c of the first clamp body 110, The distance between the first inner surface 110c of the first clamp main body 110 and the second inner surface 120c of the second clamp main body 120 is kept constant.

On the other hand, the nut stepped portion 155 may be omitted or may be omitted so as not to protrude to the second inner surface 120c when necessary. For example, the distance between the first inner surface 110c of the first clamp body 110 and the second inner surface 120c of the second clamp body 120 may be kept constant by a separate means, The nut stepped portion 155 may be formed so as not to protrude.

The ball plunger 160 is formed to include an elastic means 161 and an engagement ball 163.

The ball plunger 160 is inserted and coupled to the plunger groove 116 of the first clamp body 110. The ball plunger 160 is engaged with the plunger coupling groove 146 of the fastening bar 140 so that the fastening bar 140 is fastened to the fastening nut 150, It is prevented from loosening.

The elastic means 161 is formed of an elastic means such as a spring, and is inserted and fixed in the plunger groove 116. The elastic means 161 moves the engagement ball 163 up and down and applies elastic force to be coupled to the plunger engagement groove 146 of the fastening bar 140. The elastic means 161 applies a coupling force to the plunger engagement groove 146 so as not to be detached from the plunger engagement groove 146 during use due to vibration of a vacuum pipe or the like after the engagement ball 163 is engaged with the plunger engagement groove 146. When the fastening bar 140 is coupled to the elastic means 161, the engaging ball 163 is disengaged from the plunger engaging groove 146 by the torque applied to the fastening bar 140 by the torque wrench or the like, The clamping body 110 and the second clamp main body 120 have appropriate elasticity so that the coupling ball 163 is not separated from the plunger coupling groove 146 due to the vibration applied by the vacuum pipe or the like.

The engaging ball 163 is located on the upper side of the elastic means 161 and is engaged with the plunger engaging groove 146 of the engaging bar 140 to prevent the engaging bar 140 from being disengaged by the vibration of the vacuum pipe or the like . The coupling ball 163 may be rotatably coupled to the resilient means 161 and is coupled to a separate rotation axis (not shown) extending from the resilient means 161 at this time. Further, the engaging balls 163 may be fixed to the elastic means 161 so as not to be rotated.

The stopper 170 is formed in a pin shape and penetrates the stopper hole 117 of the first clamp main body 110 and is coupled to the stopper groove 147 of the fastening bar 140. The stopper 170 prevents the fastening bar 140 from being separated from the first clamp body 110. Meanwhile, the stopper 170 may be omitted when the fastening bar 140 is freely separated from the first clamp body 110.

Next, a high-strength clamp according to another embodiment of the present invention will be described.

7 is a front view of a high strength clamp according to another embodiment of the present invention.

7, the high-strength clamp 200 according to another embodiment of the present invention includes a first clamp body 210, a second clamp body 120, a connection bar 130, and a fastening bar 240, A nut 150 (150), and a ball plunger (260). 7, the first clamp body 210, the fastening bar 240, and the ball plunger 260 are formed differently in the structure or the coupling relationship with each other . Accordingly, the high-strength clamp 200 will be described with reference to the first clamp main body 210, the fastening bar 240, and the ball plunger 260. In addition, the high-strength clamp 200 uses the same reference numerals for the same or similar parts as the high-strength clamp 100 according to the embodiment of FIGS. 1 to 6, and detailed description thereof is omitted here.

The first clamp body 210 includes a first inner circumferential groove 111 and a first connection groove 112 and a first connection hole 113 and a first connection groove 114 and a first connection hole 115, Grooves 216 are formed. 1 to 6 except that the position of the plunger groove 216 is changed and the stopper hole 117 is not formed in the first clamp main body 210, And is formed to be the same as or similar to the first clamp body 110.

The position of the plunger groove 216 relative to the plunger groove 116 of the first clamp body 110 according to the embodiment of FIGS. 1 to 6 is different in relation to the fastening bar 240. The specific position of the plunger groove 216 will be described below.

The fastening bar 240 includes a head portion 141, a body portion 245, and a threaded portion 149. The body portion 245 has a plunger engagement groove 246 and a stopper groove 147 formed on the outer circumferential surface thereof. The plunger engagement groove 246 is formed in the stopper groove 147. Further, the plunger engaging groove 246 is formed at the other side in the inside of the stopper groove 147. The plunger groove 216 of the first clamp main body 210 is formed in a region corresponding to the stopper groove 147 rather than the outer circumferential surface of the body portion 245.

The ball plunger 260 is formed to include an elastic means 261 and a coupling ball 263. The ball plunger 260 is engaged with the stopper groove 147 and functions as a stopper before the first clamp body 210 and the second clamp body 120 are fastened. The ball plunger 260 is engaged with the plunger coupling groove 246 after the first clamp body 210 and the second clamp body 120 are coupled to prevent the fastening bar 240 from being loosened.

Next, the action of the high-strength clamp according to the embodiment of the present invention will be described.

Fig. 8 is a front view of the high-strength clamp of Fig. 1 before fastening. Fig. Fig. 9 is a front view of the high-strength clamp shown in Fig. 1 immediately after the start of fastening; Fig. 10 is a front view of the high-strength clamp of Fig. 1 after completion of the fastening. Fig. FIGS. 8 to 10 are cross-sectional views illustrating the operation of the high-strength clamp according to the present invention.

The first clamp main body 110 and the second clamp main body 120 are rotated in opposite directions about a connecting bar 130 which is coupled to the lower end and the clamping bar 140 and the clamping nut 150 are separated . At this time, since the stopper 170 is in contact with the inner surface of one side of the stopper groove 147, the fastening bar 140 is not separated from the first clamp body 110. On the other hand, when the stopper 170 is omitted, the fastening bar 140 can be separated from the first clamp body 110.

The first clamp main body 110 and the second clamp main body 120 are connected to each other so that the outer side of a pipe flange (not shown) facing each other is received in the first inner circumferential groove 121 and the second inner circumferential groove 121 . The fastening bar 140 is moved horizontally as the head 141 moves upward and the screw 149 moves downward so that the screw 149 contacts the screwing hole 151 of the fastening nut 150 As shown in FIG. At this time, a rotary tool such as a hexagon wrench is coupled to the head groove 142 formed in the head 141 of the fastening bar 140. The fastening bar 140 is gradually screwed to the fastening nut 150 while being rotated about the central axis on the rotary tool. The fastening bar 140 applies a fastening force to the first clamp body 110 while one side of the body portion 145 is in contact with the first fastening inner surface 114b of the first fastening groove 114. The fastening nut 150 is fastened to the second clamp main body 120 while the stepped surface 155a of the fastening nut 150 is in contact with the second fastening inner surface 124b of the second fastening groove 124 . The first clamp main body 110 and the second clamp main body 120 are coupled while rotating about the connecting bar at the lower end by the applied fastening force. The first clamp body 110 and the second clamp body 120 are rotated while the stepped surface of the clamping nut 150 is in contact with the first inner surface 110c of the first clamp body 110, do. The ball plunger 160 is engaged with the plunger groove 116 of the fastening bar 140 to prevent the fastening bar 140 from being loosened.

100, 200: High strength clamp
110, 210: first clamp body
120: second clamp body
130: connecting bar 140: fastening bar
150: fastening nut 160, 260: ball plunger
170: Stopper

Claims

A first clamp body formed in a semicircular shape and having a first inner peripheral surface, a first outer peripheral surface, and a first inner surface;
A second clamp body formed in a semicircular shape and having a second inner peripheral surface, a second outer peripheral surface, and a second inner surface;
A fastening bar rotatably coupled to an upper end of the first clamp body,
And a fastening nut coupled to an upper end of the second clamp body,
The fastening bar is screwed to the fastening nut while rotating about the central axis to fasten the first clamp body and the body 2 clamp body,
The second clamp main body
A second fastening groove formed in the second outer peripheral surface in the direction of the second inner surface so that a central axis direction thereof is perpendicular to the second inner surface and having a second fastening bottom surface and a second fastening inner surface; A second fastening hole penetrating through the second inner surface, and a fixing hole penetrating through the second fastening groove on the front surface or the rear surface of the second clamp main body,
Wherein the fastening nut is coupled to the second fastening hole and the second fastening hole,
Wherein the fastening nut includes a nut fixing groove formed at a position corresponding to the fixing hole,
And a fixing pin penetrating through the fixing hole and coupled to the nut fixing groove,
Wherein the fastening nut rotates around the fastening pin and is fastened to the fastening bar.

The method according to claim 1,
And a ball plunger coupled to the fastening bar to prevent the fastening bar from being loosened,
The first clamp main body
A first engagement groove formed in the first outer peripheral surface in the direction of the first inner surface and having a first engagement bottom surface and a first engagement inner surface such that the central axis direction is perpendicular to the first inner surface, And a plunger groove formed in the lower side of the first fastening floor and coupled to the ball plunger, wherein the first fastening hole is formed through the first inner surface,
Wherein the fastening bar is coupled to the first fastening hole and the first fastening hole,

3. The method of claim 2,
Wherein the fastening bar has a head portion having a fixing groove into which a rotary tool is inserted, a body portion formed at one side of the head portion and having a plunger engagement groove on an outer circumferential surface thereof, And a threaded portion engaged with the coupling nut through the first coupling hole,
Wherein the fastening nut includes a threaded hole to which the threaded portion is coupled and a nut stepped portion having a stepped surface formed on the other side portion and inserted into the second fastening hole.

The method of claim 3,
Wherein the ball plunger includes an elastic means coupled to the plunger hole and a fastening ball coupled to the elastic means and coupled to the plunger engagement groove by an elastic force.

The method of claim 3,
The first clamp main body further includes a stopper hole formed through the first fastening groove on the front surface or the rear surface,
Wherein the fastening bar includes a stopper groove formed in a ring shape having a predetermined width along the outer circumferential surface in a region corresponding to the stopper hole between the plunger engagement hole and the screw portion on the outer peripheral surface of the body,
And a stopper coupled to the stopper groove through the stopper hole.

3. The method of claim 2,
Wherein the fastening bar has a stopper groove formed in a ring shape having a predetermined width along an outer circumferential surface in a region where the plunger groove is formed on an outer circumferential surface of the body,
And a plunger engaging groove formed on the other side in the stopper groove,
Wherein the ball plunger is coupled to the stopper groove and is coupled to the plunger engagement groove after the first clamp body and the second clamp body are fastened.

3. The method of claim 2,
And the central axis of the fastening bar and the central axis of the screw fastening hole of the fastening nut coincide after the fastening bar and the fastening nut are coupled.