KR100746968B1 - Coupling - Google Patents

Abstract

It is an object of the present invention to provide a piping coupling, in which the fastening force of both unit members can be increased and tightly adhered to the pipe. In the coupling according to the present invention, the first and second unit members having the same shape are symmetrically coupled to each other, and each unit member has a first end and a second end, and the first end has both side ends of the unit member. A circumferential recess consisting of a first recessed inclined surface and a second recessed inclined surface respectively facing the center in the width direction from the first convex slope and the second convex portion at the second end facing the center in the width direction from both side ends of the unit member, respectively Each of the circumferential convex portions formed by the inclined surface is configured, and the first concave inclined surface and the second concave inclined surface of the concave portion are inclined at the same angle and direction as the first concave inclined surface and the second concave inclined surface of the concave portion.

Coupling

Description

Coupling for Piping {Coupling}

1 is a perspective view of a typical coupling.

2 is an exploded perspective view of the coupling according to the present invention;

3, 4 and 5 are front, side and plan views of a coupling according to the invention.

6 is a perspective view showing a state of use of the coupling according to the invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to piping couplings, in particular to couplings configured to increase the clamping force of the first and second unit members.

In general buildings, power plants, industrial plants, waterworks, power plants, various equipment piping, and air conditioning and air conditioning piping, there is a grooved piping system that connects both pipes in a sealed state without using a welding process.

The weld-free piping system can significantly reduce work time and cost, because pipes can be connected without performing a welding operation, and thus are widely used in a variety of piping processes.

The system used for such weld-free piping includes a gasket positioned largely in close contact with the pipe surface and a coupling positioned outside the gasket to pressurize the gasket. The coupling consists of two unit members, and the two unit members have the same structure.

A predetermined groove is formed on the outer circumferential surface of the two pipe end portions connected to each other, and a gasket is located between the two grooves. In this state, the two unit members are fastened by using the fastening means while the two unit members of the coupling are in close contact with the outer surface of the gasket, thereby completing the piping process for the two pipes.

Referring to the general structure of the coupling having such a function as follows.

FIG. 1 is a perspective view of a general coupling and shows a state in which the first and second unit members 11 and 12 constituting the coupling 10 are engaged.

As described above, the coupling 10 consists of first and second unit members 11 and 12 having a ½-ring shape, and through holes (outside both ends of each unit member 11 and 12). Extension portions 11-1 and 12-1 having 11-2 and 12-2 formed therein are formed.

On the other hand, protrusions 11-3 and 12-3 protruding at predetermined heights are formed on both outer edges of the inner surfaces of the unit members 11 and 12, respectively. As described above, each of the two pipe ends is positioned in a groove formed on the outer circumferential surface thereof.

Each longitudinal section of the first and second unit members 11, 12 consists of inclined surfaces 11-4, 12-4 inclined in the width direction of each member, that is, the longitudinal direction of the pipe to be fastened, where each unit member The inclination directions of the inclined surfaces 11-4 and 12-4 at one end of (11, 12) are opposite to the inclination directions of the inclined surfaces at the other end. Therefore, when the first and second unit members 11 and 12 are pressed while the two longitudinal inclined surfaces 11-4 and 12-4 are in contact with each other, as shown in FIG. In the state where 12-4) is engaged, the first and second unit members 11 and 12 form a circular coupling 10.

In the state where two pipes were matched, the gasket was positioned at the boundary thereof, and the first and second unit members 11 and 12 correspond to each other as shown in Fig. 1 with the inner circumferential surface thereof in close contact with the gasket.

Then, the fastening means (bolts 19 and nuts) in the through holes 11-2 and 12-2 formed in the extension portions 11-1 and 12-1 outside the both ends of the unit members 11 and 12, respectively. (18), the first unit member 11 and the second unit member 12 are inclined surfaces 11-4 and 12-4 by the structures of the inclined surfaces 11-4 and 12-4 at both ends. Slip on) and tighten in a staggered form.

The gaskets located therein are compressed by tightening the first and second unit members 11 and 12, and as a result, the two pipes corresponding to each other are sealed by the gasket and the coupling 10. Leads to.

Here, as shown in FIG. 1, when the first and second unit members 11 and 12 are fastened to constitute a circular coupling 10, the following problems can be expected.

The contact surfaces of both unit members 11 and 12 are inclined longitudinal sections 11-4 and 12-4, and therefore, even if a vertical tightening force is applied to both unit members 11 and 12, each longitudinal section 11-4 and 12 is applied. In the case of -4), the force acts in the inclined direction (the arrow direction in FIG. 1), and the forces in the inclined direction are staggered in both longitudinal sections. Due to this action, the torsional force can be considered to act as a whole the coupling 10.

When the pressure in the pipe increases rapidly, the projections 11-3 and 12-3 formed on the inner surfaces of the unit members 11 and 12 may be separated from the grooves formed in the pipe, so that the coupling as described above ( The torsional phenomenon of 10 may act as a factor in which the protrusions 11-3 and 12-3 of the unit members 11 and 12 are easily detached from the groove of the pipe.

On the other hand, when the twisting phenomenon of the coupling 10 occurs, the gasket positioned between the unit members 11 and 12 and the pipe surface may be twisted, and the twisting of the gasket causes the leakage of fluid at the interface of the pipe. Done.

The present invention is to solve the above problems arising in the coupling used to seal the pipe weld-free, it is to provide a coupling that can increase the fastening force of both unit members and can be in close contact with the pipe For that purpose.

In the coupling according to the present invention, the first and second unit members having the same shape are symmetrically coupled to each other, and each unit member has a first end and a second end, and the first end has both side ends of the unit member. A circumferential recess consisting of a first recessed inclined surface and a second recessed inclined surface respectively facing the center in the width direction from the first convex inclined surface and the second convex portion facing the center in the width direction from both side ends of the unit member at the second end; Each of the circumferential convex portions formed by the inclined surface is configured, and the first concave inclined surface and the second concave inclined surface of the concave portion are inclined at the same angle and direction as the first concave inclined surface and the second concave inclined surface of the concave portion.

The first concave slope and the second concave slope of the convex portion, and the first concave slope and the second concave slope of the recess portion may be connected by a linear portion in the width direction of the unit member.

In addition, both ends of each unit member are formed with extension portions extending in the radial direction of the unit member, and each extension portion may have an elliptical through hole having a long axis formed in the radial direction of each unit member.

Hereinafter, with reference to the accompanying drawings, the coupling according to the present invention will be described in detail.

2 is an exploded perspective view of a coupling according to the present invention, wherein the coupling 100 according to the present invention also includes two unit members 110 and 120, and the two unit members 110 and 120 have the same structure and Has specifications. Meanwhile, the first and second unit members 110 and 120 are fastened in a symmetrical state.

Hereinafter, for convenience, the configuration of the first unit member 110 will be described.

The first unit member 110 having a predetermined thickness and width has a ½-ring shape, and an extension part 111 extending in the radial direction of the member is formed outside both ends. In addition, a through hole 112 is formed in each extension part 111.

Inner surfaces of the first unit member 110 are formed with protrusions 113 protruding at predetermined heights along both outer edge portions, and the protrusions 113 are formed in grooves formed on the outer circumferential surfaces of the two pipe end portions described above. Will be located.

The first end of the first unit member 110 has a circumferential recess 114 in the circumferential direction, and the second end has a convex recess 115 in the circumferential direction. same.

As shown in FIG. 4, which is a side view of the coupling 100, the recessed portions 114 formed at the first ends of the coupling 100 have a first recessed slope 114-1 and a second recessed portion facing the center line in the width direction from both ends of the member, respectively. It is formed by the inclined surface 114-2. The portion where the first recessed part 114-1 and the second recessed part 114-2 (the widthwise center of the member) meet may have a V shape by the two inclined surfaces 114-1 and 114-2. The end of the first recessed part 114-1 and the end of the second recessed part 114-2 may have a shape that is connected through a linear part in the width direction.

In addition, as shown in FIG. 2, the convex portions 115 formed at the second ends are each of the first concave slope 115-1 and the second concave slope 115-2 which face the center line in the width direction from both end portions of the member. Is formed.

The portion (width center line of the member) where the first inclined surface 115-1 and the second inclined surface 115-2 of the convex portion 115 meet is defined by two convex inclined surfaces 115-1 and 115-2. Although it may have a "Δ" shape, the end of the first inclined surface 115-1 and the end of the second inclined surface 115-2 may have a shape connected through a linear portion in the width direction.

Meanwhile, FIG. 4, which is a side view, shows a state in which the first and second unit members 110 and 120 correspond to each other, and therefore, the recessed part 114 and the second unit member formed at one end of the first unit member 110. A convex portion 125 formed at one end of the 120 is engaged.

3 is a front view of the coupling (shown in a state where the first unit member 110 and the second unit member 120 are spaced for convenience), and the main portion 114 of the first unit member 110 is shown. The first recessed part inclined surface 114-1 and the second recessed part inclined surface 114-2 are formed with the first concave inclined surface 125-1 and the second concave inclined surface 125-of the convex portion 125 of the second unit member 120. Inclined at the same angle and direction as 2). In addition, the first convex slope 115-1 and the second convex slope 115-2 of the convex portion 115 of the first unit member 110 may include the first concave portion 124 of the second unit member 120. It is inclined at the same angle and direction as the recessed part inclined surface 124-1 and the second recessed part inclined surface 124-2.

Accordingly, when the both unit members 110 and 120 are fastened, the recesses 114 and the recesses 115 of the first unit member 110 are respectively the recesses 125 and the recesses 124 of the second unit member 120. To contact.

The second unit member 120 that is coupled to the first unit member 110 as described above to form one coupling 100 has the same configuration as the first unit member 110, hereinafter, the first unit member ( The fastening process of the 110 and the second unit member 120 and its function will be described with reference to each drawing including FIG. 6.

FIG. 6 is a perspective view illustrating a use state of the present invention, and illustrates a state in which two unit members 110 and 120 fasten pipes P1 and P2 (shown in dashed lines) in a corresponding state.

As described above, gaskets (not shown) are positioned at the boundary portions of the two pipes P1 and P2 so that the first and second unit members 110 and 120 have their inner surfaces. It is matched with each other as shown in Fig. 2 to be in close contact with the gasket. As described above, in order to configure the coupling 100, the first and second unit parts 110 and 120 are fastened in a symmetrical state.

The first unit member 110 and the second unit member 120 are fastened by fastening means to form a circular coupling 100. That is, the through holes 112 and 122 in which the bolts 201 are formed in the extension parts 111 and 121 in a state where the extension parts 111 and 121 formed on the outer sides of both end portions of the unit members 110 and 120 correspond to each other. ) And both unit members 110 and 120 are fastened by fastening the nut 202 to the passed bolt 201.

Meanwhile, when the first and second unit members 110 and 120 are fastened, the tightening force of both unit members 110 and 120 is transmitted to the gasket, so that the two pipes P1 and P2 are hermetically connected.

At this time, in the process of assembling the circular coupling 100, the first end (recessed portion) 114 of the first unit member 110 receives the second end (convex portion) 125 of the second unit member 120. The second end (convex portion) 115 of the first unit member 110 is accommodated in the first end (recess portion) 124 of the second unit member 120.

As described above, the first unit member 110 and the second unit member 120 are securely fastened by the uneven coupling at both ends thereof. In such a coupled state, the tightening force generated in both unit members 110 and 120 by the fastening means acts perpendicular to the surfaces of the pipes P1 and P2, that is, in the radial direction of the pipe.

On the other hand, in the process of fastening the nut 202 to the bolt 201, when a tightening force is applied to both unit members (110, 120), the first inclined surface 114 of the recess 114 of the first unit member 110 -1) and the second recessed part inclined surface 114-2 are in contact with the first concave inclined surface 125-1 and the second concave inclined surface 125-2 of the convex portion 125 of the second unit member 120, It can slide in a constant direction. Accordingly, the convex portion 115 of the first unit member 110 and the recessed portion 124 of the second unit member 120 may also come into contact with each other and may slide in a predetermined direction (arrow direction in FIG. 3).

Since the slip is made so that each unit member (110, 120) is moved in the radial direction of the coupling 100, each unit member (110, 120) can apply a greater tightening force to the pipe (P1, P2), Accordingly, the protrusions 113 and 123 are formed on the inner surfaces of the unit members 110 and 120 respectively located in the grooves formed on the outer circumferential surface of the pipe end portion, and the protrusions 113 and 123 are tightly attached to the bottom surface of the groove by the tightening force of both unit members. .

Here, since the first unit member 110 and the second unit member 120 are unevenly coupled at both ends thereof, the first and second unit members 110 and 120 to which the tightening force acts are shifted in the longitudinal direction of the pipe. The phenomenon does not occur, and thus, the phenomenon in which the coupling 100 is distorted as a whole does not occur.

Meanwhile, as shown in FIG. 5, which is a plan view of the coupling, the through hole 112 formed in an extension of each unit member 110 (only the first unit member is shown in FIG. 5, which is a plan view) is the unit member 110. Consists of an oval with a long axis in the radial direction. On the other hand, the bolt 201 inserted into the through holes 112 and 122 of the first and second unit members 110 and 120 has an upper head portion 201-located in one of the through holes (for example, 112). The cross section of 1) is elliptical, but the cross section of the lower portion 201-2 is circular.

The bolt 201 having such a shape does not rotate without using a separate means when fastening the nut 202. In particular, the elliptical head portion 201-1 is located within the through hole 112 of one unit member (eg, 110), and the lower portion 201-2, which is a circular portion, has the other unit member (eg, The lower portion 201-2 of the bolt 201 has a certain margin in the through hole 122 by being located in the elliptical through hole 122 of 120. Therefore, the first unit member 110 and the second unit member 120 irrespective of the bolt 201 and the nut 202 fastened when the first unit member 110 acts on the second unit member 120. ) May slide while radially sliding by the recesses 114 and 124 and the convex portions 115 and 125 at both ends.

The coupling according to the present invention can prevent the unit member from twisting in the longitudinal direction of the pipe when the two unit members are fastened to connect the pipes by forming recesses and convex portions at both ends of the first and second unit members. Can be.

In addition, the outer surface of the concave portion formed at the first end of each unit member and the inner surface of the convex portion formed at the second end are formed with inclined surfaces in the same direction. In the radial direction, and thus a strong tightening force can be applied to the pipe.

Preferred embodiments of the present invention described above are disclosed for purposes of illustration, and those skilled in the art having various ordinary knowledge of the present invention may make various modifications, changes, and additions within the spirit and scope of the present invention. Additions should be considered to be within the scope of the following claims.

Claims (3)

In the coupling for connecting pipes, The first and second unit members having the same shape as each other are coupled in a symmetrical state, Each unit member has a first end and a second end, and the first end has a circumferential recess consisting of a first recessed inclined surface and a second recessed inclined surface facing the center in the width direction from both side ends of the unit member. A circumferential convex portion consisting of a first convex slope and a second convex slope inclined toward the center in the width direction from both side ends of the unit member, respectively, is provided at the second end, and the first and second inclined surfaces of the recess are And the first inclined surface and the second inclined surface of the convex portion are inclined at the same angle and direction. The coupling according to claim 1, wherein the first concave slope and the second concave slope of the convex portion, and the first concave slope and the second concave slope of the recess are connected by a linear portion in the width direction of the unit member. According to claim 1, wherein both ends of the end of each unit member is formed with an extension extending in the radial direction of the unit member, each extension is formed with an elliptical through hole formed in the radial direction of each unit member Coupling.

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