KR20170085748A

KR20170085748A - Apparatus for checking looseness of fastner in flange

Info

Publication number: KR20170085748A
Application number: KR1020160005263A
Authority: KR
Inventors: 김성순
Original assignee: 김성순
Priority date: 2016-01-15
Filing date: 2016-01-15
Publication date: 2017-07-25
Also published as: KR101954491B1

Abstract

The present invention relates to a loosening confirmation apparatus for a coupling member of a flange, and more particularly to a loosening confirmation apparatus for a bolt head or nut of a flange, which comprises a hollow portion hollowed in an axial direction so as to receive a bolt head or nut of the bolt, an inner peripheral surface defining the hollow portion, A cap having at least one T-shaped guide groove;
And a stopper having a base, a vertical protrusion extending lengthwise at one end of the base, a slant protrusion disposed adjacent to the other end of the base, and a stopper positioned at both side edges of the base, Shaped guide groove of the cap so as to be placed in an interview state with the bolt head and / or the nut, so that it can be visually confirmed whether the joint member is loosened or broken by an unexpected external force.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a fastener-

The present invention relates to a device for confirming a loosening state of a bolt and a nut of a flange for a pipe due to breakage of a loosening confirmation device for a coupling member of a flange, particularly a loosening confirmation device.

Piping is to be applied to a variety of industrial sectors, and piping must be extended as necessary. The pipe of a certain length is connected to one pipe and the other pipe via a flange provided at an end of the pipe.

The two flanges are usually arranged to face each other and are joined through a coupling member composed of a bolt and a nut. The flange used for connection of the pipe may be exposed to the vibration for a long time due to the fluid flowing along the pipe, so that the tightening and binding of the bolt may be weakened. As disclosed in Patent Document 1, various types of bolts .

In addition, a meter for measuring the flow rate of the fluid flowing along the pipe can also be interposed between the flanges, which enables the operation of the meter simply by disassembling the engagement member.

As described above, although the flange of the pipe focuses on the development of technology for preventing the bolt from loosening, it is true that the method of confirming the loosened state of the bolt is not secured. Therefore, it is necessary to consider a method to confirm whether the bolt fastening of the flange is intentionally or unnecessarily dismantled from the outside.

Korean Utility Model Registration No. 20-0313519

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-described problems, and it is an object of the present invention to provide a method of manufacturing a bolt and / or nut by simply placing a cap around a bolt head and / or a nut, It is possible to confirm whether the flange is loosened by checking whether the part or the body itself is crushed or broken due to the brittleness characteristic of the mounted jam.

In order to accomplish the above object, according to a preferred embodiment of the present invention, a loosening confirmation device for a coupling member of a flange includes a cap body portion fixed around a bolt head and / or a nut of the bolt, It is possible to confirm the loosened state according to the presence or absence of breakage,

The tubular cap has a hollow portion hollowed out in the axial direction so as to receive the bolt head or nut of the bolt, an inner circumferential surface defining the hollow portion, and at least one T-shaped guide groove formed axially in the inner circumferential surface,

The retaining piece has a base, a vertical protrusion extending lengthwise at one end of the base, a slanting protrusion disposed adjacent to the other end of the base, and a stopper positioned at both lateral edges of the base, Shaped guide groove.

The T-shaped guide groove of the present invention can be formed at the corner of the inner peripheral surface.

Here, the T-shaped guide groove has a receiving groove formed in an inner region of the body of the cap; A stepped portion extending inward from both ends of the receiving groove; And a slit that provides a spacing space between the stepped portions.

The inclined projection is inclined upward toward the free end of the vertical projection at a predetermined angle? Relative to the base, and the stopper is inclined upward toward the other end of the base at a predetermined angle? With respect to the base.

In an embodiment of the present invention, one or more latching jaws may be formed on the outer circumferential surface of the bolt head or nut of the bolt.

Optionally, the latching jaws may be formed at the corner of the bolt head or at the corner of the nut.

The engaging jaw may form an inclined surface on the outer circumferential surface of the bolt head or the outer circumferential surface of the nut so as to engage with the inclined projection.

The cap may further include a dome-shaped portion having a concave portion formed therein, on the upper surface thereof.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings.

Prior to that, terms and words used in the present specification and claims should not be construed in a conventional and dictionary sense, and the inventor may properly define the concept of the term in order to best explain its invention It should be construed as meaning and concept consistent with the technical idea of the present invention.

According to the present invention, the present invention is mounted around a bolt and / or a nut for fastening a flange for facilitating the interconnecting of pipelines, and visually confirms whether or not the bolt and / or nut is loosened.

The present invention can confirm the loosened state of the bolt and / or the nut through the broken or broken state of the cap and / or the latch member made of a material having brittleness due to external force. Particularly, the present invention employs a cap for detachably attaching a disengaged retaining piece which is broken or broken when an external force is applied after being mounted on a bolt head and / or a nut, so that an unauthorized operator unnecessarily dismounts the flange, Or even if the nut is fastened in its original state, it can be easily judged that it has been re-fastened after being released.

In addition, the present invention can be installed or replaced through a simple work process in which the bolt / nut is simply sandwiched between the periphery of the bolt / nut fixed to the flange or between the pitches, so that the number of workings can be remarkably reduced.

1 is a perspective view schematically showing a loosening confirmation device for a coupling member of a flange according to a preferred embodiment of the present invention.
Fig. 2 is a cross-sectional view of the loosening confirmation device taken along the line AA in Fig.
3 is a front view of the unrolling device shown in Fig.
4 is an exploded perspective view schematically showing the unrolling device shown in Fig.
5 is an exploded perspective view of a flange for a pipe having a loosening confirmation device for a coupling member of a flange according to a preferred embodiment of the present invention.
6 is a cross-sectional view showing the state of engagement of the pipe flange shown in Fig.
Fig. 7 is an enlarged view of the arc portion C of Fig. 6. Fig.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages, features, and ways of accomplishing the same will become apparent from the following description of embodiments taken in conjunction with the accompanying drawings. In the specification, the same reference numerals denote the same or similar components throughout the specification. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A loosening confirmation device for a coupling member of a flange according to a preferred embodiment of the present invention will now be described in detail with reference to the accompanying drawings.

Referring to FIGS. 1 to 4, a release confirmation device 1 according to a preferred embodiment of the present invention is formed in a ring shape or a cylindrical shape that can be fitted around a bolt and / or a nut, which is a coupling member of a flange A cap 100 having a hollow portion 110 for accommodating a head and / or nut N of a bolt B constituting a coupling member and an inner circumferential surface 120 defining the hollow portion 110, (Not shown).

Generally, a pipe is formed with a flange at the tip of the pipe for joining the pipe, and a flange is connected between the flange and the flange by a bolt fastening method to connect the pipe. The release confirmation device 1 according to the present invention is disposed around a bolt and / or a nut, which is a coupling member of a flange, in order to disassemble (or disassociate) the engagement member, the release process is performed only after the engagement piece 200 is broken or broken Can be performed. As a result, it is possible to help the operator to determine whether or not the flange has been released through the fracture or breakage of the retaining piece 200.

In the present invention, the cylindrical cap 100 forms a hollow portion 110 hollow in the axial direction. In particular, the hollow portion 110 may be formed in a size and shape to accommodate the bolt head or nut body of the bolt. The hollow portion 110 may be formed in the same shape as a regular polygon such as a hexagonal or rectangular shape so that the unnecessary rotation of the cap 100 disposed around the bolt head or the nut may be prevented in advance.

The latching piece 200 is mounted inside at least one T-shaped guide groove 130 formed on the inner peripheral surface of the cap 100. [ As shown in the figure, the two T-shaped guide grooves 130 may be arranged to face each other on the inner circumferential surface of the cap 100, but the present invention is not limited thereto.

The T-shaped guide groove 130 is axially formed on an inner circumferential surface of the cylindrical cap 100, preferably at a corner of the inner circumferential surface 120, as shown in the drawing, As shown in FIG.

Specifically, the T-shaped guide groove 130 has a wide receiving groove 131 formed in an inner region of the body of the cap 100 and a stepped portion 131 extending from both ends of the receiving groove 131, A slit 133 having a narrower width than the receiving groove 131 is formed as a spacing space between the stepped portion 132 and the stepped portion 132.

The engaging piece 200 includes a flat base 210 that is slid along the receiving groove 131 in the axial direction and seated on the receiving groove 131 and a vertical base member 210 extending in the direction orthogonal to the one end of the base 210. [ A stopper 240 interposed between the vertical protrusion 220 and the slant protrusion 230 of the base 210. The stopper 240 is disposed on the upper surface of the base 210, Lt; / RTI >

The sloped protrusion 230 is inclined upward toward the free end of the vertical protrusion 220 at a predetermined angle a relative to the base 210 while the sloped protrusion 230 is part of the base 210 And then bent at an acute angle. Correspondingly, the stopper 240 is inclined upward toward the other end of the base 210 at a predetermined angle? Relative to the base 210, and the stopper 240 is inclined at an acute angle And may be formed by bending.

The latching piece 200 is slidably mounted in the T-shaped guide groove 130 of the cap 100 in the axial direction as described above. The vertical protrusion 220 protrudes in the radial direction from the inner peripheral surface of the cap, And extends toward the hollow portion 110 of the cap 100. The width of the vertical protrusion 220 is smaller than the spacing between the two stepped portions 132 arranged opposite to each other so as to permit the sliding movement of the latching piece 200. [ The stopper 240 is in contact with the two stepped portions 132 facing each other to define the slit 133 of the T-shaped guide groove 130 so that unnecessary movement in the axial direction of the engaging piece 200 So that it is possible to fix the position of the engagement piece in the T-shaped guide groove of the cap. The stopper 240 of the latching part 200 is inclined upward toward the other end of the base 210 to allow easy sliding from the lower part to the upper part of the tubular cap 100 along the axial direction of the T- The engaging piece 200 mounted on the T-shaped guide groove 130 can restrict the downward sliding movement through the free end of the stopper 240 that continuously presses the step portion 132 have. In addition, the latching piece 200 may restrict the upward sliding through the T-shaped guide groove 130 by the dome-shaped portion 150 disposed on the upper surface of the cap 100. [

The present invention should forcefully separate the cap 100 surrounding the bolt head and / or nut from the bolt head and / or nut in order to loosen the bolts and / or nuts of the coupled members already engaged. During the separation process of the cap, the vertical projection 220 or the slant projection 230 of the retaining piece 200 inserted and fixed to the bolt head and / or nut must be crushed or broken. The latching piece 200 can be mounted in the T-shaped guide groove 130 through its own elasticity, can be engaged with the bolt and / or nut, and the vertical protrusions and / It can be broken into brittle fracture in the inclined projection. The retaining piece of the present invention may be made of any material having predetermined elasticity and brittleness.

When the worker or the manager is inserted or fixed in a predetermined position, for example, in the stopping jaw, or between the pitches without damaging the catching piece 200 with naked eyes, it is judged that the process of unlocking the joining member of the bolt and the nut has not been performed When a part of the engagement piece and / or a part of the cap are broken or broken, it can be judged that the external force is forcibly applied to the cap 100 of the release confirmation device 1 in order to release the engagement member. That is, the present invention is designed so that it is possible to easily confirm whether the coupling member of the flange is loosened by checking the breakage or crushing state of the cap of the loosening confirmation device and the latch piece 200 mounted therein. For this purpose, the cap 100 according to the present invention may be made of a transparent plastic material.

Optionally, the cap 100 may further include a dome-shaped portion 150 on its upper surface.

The dome-shaped portion 150 has a recess 151 formed therein. The recess 151 communicates with the hollow portion 110. For example, the dome-shaped portion 151 covers the male thread end portion of the bolt B. The male screw of the bolt B will be received in the recess 151. [

Further, since the dome-shaped portion 150 does not allow direct external contact between the bolt B and the nut B, it is possible to prevent and check the possibility of loosening by preventing an unnecessary external force from touching the coupling member (bolt and nut) will be.

FIGS. 5 to 7 are schematic views illustrating a loosening confirmation device according to a preferred embodiment of the present invention as a coupling member, that is, a flange mounted on a bolt and a nut. 6 and 7 illustrate in advance that the stopper is omitted in order to clearly show a state in which a retaining piece (indicated by a dot) mounted on the inner circumferential surface of the cap is disposed around the periphery of the nut and / or bolt head Leave.

5 to 7, the cap 100 of the loosening confirmation apparatus according to the present invention is mounted on the bolt and the nut, but the present invention is not limited to this, and the cap 100 may be mounted on only one of the bolt and the nut have.

The flange connection structure for piping is as follows. A flange 10 is formed at the tip of one pipe P for facilitating connection with the other pipe P. This flange 10 forms a plurality of insertion holes 11 along the circumference of the flange, and the insertion hole 11 allows insertion of the bolt B. [

As shown in the drawing, the two flanges 10 are positioned opposite to each other and the bolts B are inserted into the insertion holes 11 when the insertion holes 11 formed in the two flanges 10 coincide with each other. The two flanges 10 are coupled through the bolts B and the nuts N when the ends of the bolts B, that is, the male threads are fastened to the female studs of the nuts N and tightened.

As is well known to those skilled in the art, a gasket is disposed between two flanges 10 to prevent leakage of fluid between flanges 10, while a gap between two flanges 10, for example, ) May be mounted to measure the flow rate of the fluid flowing along the pipe.

Here, the bolt B has a bolt head, a bolt body elongated from one surface of the bolt head, and a male screw thread formed around the outer circumferential surface of the bolt body, while the nut N is screwed with a female screw thread . As shown in the figure, the shape of the bolt head and the nut (N) may be a regular polygonal shape such as a hexagon or a square.

After fastening the two flanges 10 through the bolts B and the nuts N, the cap 100 of the present invention has the hollow portion 110 (see Figure 2) placed on the bolt head and the flange 10 , The vertical protrusion 220 of the retaining piece 200 is disposed in an interviewed state on the upper surface of the bolt head. That is, as the cap 100 is displaced closer to the flange 10, the free end of the inclined projection 230 is guided along the inclined surface of the engagement step B23 after spanning the entrance of the engagement step B23 of the bolt head It can be fixed around the bolt head. As described above, the latching piece 200 is made of a material having a predetermined elasticity and can induce a warping phenomenon of the slanted projection 220 so that the latching piece 200 can be easily placed on the latching step B23. The distance between the upper surface of the bolt head and the engaging step B23 may be equal to or slightly larger than the distance between the vertical protrusion 220 and the slant projection 230 so that the bolt head can be reliably matched to the inside of the cap.

If the cap 100 is to be forcedly pulled out from the bolt head to be separated, the inclined projection 230 of the retaining piece 200 is forcedly bent over the engagement step B23 and broken or broken by brittleness The cap 100 of the release confirmation device 1 will be disassembled from the bolt head. In addition, if the cap 100 is optionally to be rotated and separated from the bolt head, the inclined protrusion 230 and the cap body will force contact with the angular shape of the bolt head and break. That is, according to the present invention, it is possible to confirm the access intention to perform the unlocking process of the coupling member through the fracture or breakage state of the slanted projection 230 of the lock piece 200 after mounting.

Alternatively, the cap 100 of the unlocking device 1 according to the preferred embodiment of the present invention may be fixedly mounted on the nut N by forcing it around the nut N (see FIG. 7). That is, the free end of the inclined protrusion 230 bent obliquely at a predetermined angle is stuck on the latching step N23 of the nut N, or the free end of the vertical protrusion 220 crosses the nut N And is sandwiched between a male screw and a male screw of a protruding bolt (B). The distance between the lower surface of the nut and the engaging step N23 may be equal to or slightly larger than the distance between the vertical protrusion 220 and the slant projection 230 so that the nut can be reliably matched to the inside of the cap.

If, optionally, the cap 100 is to be forced out of the nut N or rotated to separate it, the flat vertical protrusion 220 will forcefully contact and break with the spiral wound male thread. In addition, the inclined projection 230 of the retaining piece 200 is bent forcibly while being bent over the retaining piece N23 of the nut N, so that the cap 100 will be disassembled from the nut due to brittle fracture. That is, according to the present invention, it is possible to confirm the access intention to perform the unbonding process of the coupling member through the crushing or breakage state of the vertical projection 220 or the slant projection 230.

The vertical protrusions 220 of the retaining pieces 200 are also spaced apart from one another around the inner circumferential surface 120 of the cap 100 It is possible. The engaging step B23 is preferably formed at the corner of the bolt head on a regular polygon. Of course, the latching jaw B23 is sized and shaped to accommodate the slant projection 230. [

The one or more latching jaws N23 are formed around the periphery of the nut N and the vertical protrusions 220 of the latching piece 200 are also spaced equidistantly around the inner circumferential surface 120 of the cap 100 . It is preferable that the latching jaw N23 is formed at the corner of the nut on the regular polygon. Of course, the latching jaw N23 is sized and shaped to accommodate the slant projection 230. [

The cap of the present invention having the bolt head and / or the inclined jaw at the outer circumferential surface of the nut can provide an advantage that the bolt head and / or the nut can be mounted without separating from the bolt head and the nut. The cap of the present invention may also be employed in the fastening structure of the tongue bolt and nut.

Although the present invention has been described in detail with reference to specific embodiments thereof, it is to be understood that the present invention is not limited to the above-described embodiment, It will be apparent that modifications and improvements can be made by those skilled in the art.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

1 ----- loosening confirmation device,
100 ----- cap,
110 ----- hollow part,
130 ----- T-shaped guide groove,
200 ----- engaging piece,
210 ----- Base,
220 ----- vertical protrusion,
230 ---- slant projection,
240 ----- Stopper.

Claims

A side pipe P having a flange 10 having a plurality of insertion holes 11 at one end and a flange 10 having a plurality of insertion holes 11 at the other end, (B) and a nut (N) so as to mutually oppose each other,
A hollow portion 110 hollow in the axial direction so as to receive the bolt head or nut N of the bolt B,
An inner circumferential surface 120 defining the hollow portion 110, and
A tubular cap (100) having at least one T-shaped guide groove (130) formed in the inner peripheral surface (120) in an axial direction;
A base 210,
A vertical protrusion 220 extending at one end of the base 210,
An inclined projection 230 disposed adjacent to the other end of the base 210,
And a stopper (240) provided on both side edges of the base (210)
Wherein the cap (100) is fixed around the bolt head or the nut (N) of the bolt (B) by attaching the retaining piece (200) to the T-shaped guide groove (130) Drum loosening confirmation device.

The method according to claim 1,
Wherein the T-shaped guide groove (130) is formed at a corner of the inner circumferential surface (120).

The method according to claim 1,
The T-shaped guide groove (130)
A receiving groove 131 formed in an inner region of the body of the cap 100;
A step 132 extending inward from both ends of the receiving groove 131; And
And a slit (133) for providing a spacing space between the step portions (132).

The method according to claim 1,
The inclined projection 230 is inclined upward toward the free end of the vertical protrusion 230 at a predetermined angle alpha with respect to the base 210,
Wherein the stopper (240) is inclined upward toward the other end of the base (210) at a predetermined angle (?) With respect to the base (210).

The method according to claim 1,
Wherein the bolt head of the bolt or the outer circumferential surface of the nut is formed with one or more engaging protrusions (B23, N23).

The method of claim 5,
Wherein the engaging jaws (B23, N23) are formed at a corner of the bolt head or a corner of the nut.

The method of claim 5,
Wherein the engagement protrusions (B23, N23) form an inclined surface to be engaged with the slant projection (230).

The method according to claim 1,
Wherein the cap (100) is further provided with a dome (150) having a recess (151) formed therein on the upper surface thereof.