KR101873628B1

KR101873628B1 - Pipe coupling

Info

Publication number: KR101873628B1
Application number: KR1020160012164A
Authority: KR
Inventors: 김동준
Original assignee: 김동준
Priority date: 2016-02-01
Filing date: 2016-02-01
Publication date: 2018-07-02
Also published as: KR20170091314A

Abstract

The present invention relates to a pipe coupling for interconnecting two pipes. In the pipe coupling, the first member and the second member are fastened by bolts and nuts in a state that the pipe is wrapped. In the present invention, a ring-shaped insertion groove is provided in the bolt to provide a reference point at which the nut must be fastened. When the nut is fastened over the insertion groove, the marker can be inserted into the insertion groove, so that it can be visually confirmed that the fastening operation is normally performed. Through the present invention, it is possible to avoid work defects in which one of the bolts on either side of the pipe coupling is loosely fastened.

Description

Pipe Coupling {PIPE COUPLING}

The present invention relates to a pipe coupling for interconnecting two pipes.

The pipe coupling is for interconnecting two pipes and is divided into two types, flexible pipe cooupling and rigid pipe coupling. The floating pipe coupling is a coupling which can be slightly flowed along the longitudinal direction of the pipe in consideration of the fact that the pipes are connected to the two connected pipes and then vibrated or thermally deformed, while the fixed pipe coupling is connected When coupled to two pipes, it means a coupling that can not flow along the length of the pipe. Fixed couplings are mainly used to connect pipes continuously, and a fluid coupling is installed between fixed couplings to prepare for thermal deformation or vibration of pipes. For example, five fixed couplings are installed successively and then one fluid coupling is installed.

Flow coupling is illustrated in Figures 1 and 2. [ Fig. 1 is a schematic perspective view of a conventional floating pipe coupling, Fig. 2 is a schematic side view of the pipe coupling shown in Fig. 1, in which the pipe coupling is indicated by a solid line and the pipe to be connected is a hypothetical line Is displayed.

Referring to Fig. 2, the first pipe p1 and the second pipe p2 are shown as imaginary lines. Connection portions j are formed at both ends of the first pipe p1 and the second pipe p2. The connecting portion (j) is a portion to which the pipes are interconnected and has an outer diameter slightly smaller than the pipe body. That is, a slight step is formed between the main body and the connecting portion (j).

Referring to FIGS. 1 and 2, the fluid coupling 1a is coupled to the connection portion j to interconnect the first pipe p1 and the second pipe p2. The fluid coupling 1 a is composed of a first member 2 and a second member 3 and the first member 2 is arranged to surround the upper side of the connecting portion j and the second member 3 is connected to the connecting portion j. Reference numeral 9a denotes a connecting line in which the first member and the second member abut. Through holes 7 and 8 are formed in both end portions of the first member 2 and the second member 3 so that the bolts 5 inserted into the through holes 7 and 8 are fastened to the nuts 6 The first member 2 and the second member 3 are coupled to each other. The first pipe (p1) and the second pipe (p2) are connected to each other by the coupling force of the coupling. On the other hand, the gasket 4 is fitted on the outer circumferential surface of the connecting portion j to maintain airtightness between the two pipes p1 and p2. There is a slight gap d on both sides of the fluid coupling, allowing some flow.

3 and 4 show a conventional fixed pipe coupling. Fig. 3 is a schematic side view of the state before the conventional fixed pipe coupling is fully engaged with the pipe, and Fig. 4 is a schematic side view of the state where the fixed pipe coupling shown in Fig. 3 is fully engaged with the pipe.

Referring to Figs. 3 and 4, all the configurations of the fixed pipe coupling 1b are the same as the floating pipe coupling 1a shown in Figs. 1 and 2. The connecting line 9b where the end of the first member 2 and the end of the second member 3 meet is inclined with respect to the direction perpendicular to the direction in which the bolts 5 are fastened. 3, the first member 2 and the second member 3 are disposed on the same straight line in a state where the bolt 5 is not completely fastened. However, in the process of fastening the bolt 5, The first member 2 and the second member 3 are pressed in a direction in which they are in contact with each other so that the first member 2 and the first member 2 are slid with respect to each other as shown in Fig. When the first member 2 and the second member 3 are arranged so as to be shifted from each other in this way, the first member 2 is completely brought into close contact with the second pipe p2 and the second member 3 is brought into close contact with the first pipe p1 So that the stationary coupling 1b does not have a gap between the connecting portions j of the pipes. That is, unlike the floating coupling 1a, the fixed coupling 1b is fixed to the connection j of the pipe and is not allowed to flow along the length of the pipe. The fixed coupling 1b is used for rigid coupling between the pipes.

As described above, the coupling used for connection of the pipe is combined by the bolts 5 and the nuts 6, in both the fixed type and the fluid type, the first member 2 and the second member 3.

The coupling has a very simple structure as described above. Since the mechanical structure is simple, a problem is rarely caused by defects of the coupling itself. The problem arises when tightening bolts and nuts is not accurate when installing the coupling. That is, even if a high water pressure is applied to the inside of the pipe, there is no problem if the bolts and nuts on both sides of the coupling are correctly fastened. However, if bolts and nuts are not completely fastened as shown in the photographs of FIG. 5 and FIG. 6, if high pressure water pressure is applied, coupling of coupling is released and a large accident occurs.

The reason for this defect in the installation of the coupling is due to operational errors. As described above, the coupling tightens the bolts and nuts on both sides. However, when one side is deeply fastened, the other side must be fastened shallowly. Both sides must be tightened to a certain depth, but they are tightened to one side and work defects occur. The worker has to untie the bolt and work again if it is tightened at either side, but it is overlooked. This defect is basically a worker's mistake, but it is required to develop a pipe coupling that prevents structural defects.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a pipe coupling with an improved structure for visually inspecting whether a coupling is securely fastened.

On the other hand, other unspecified purposes of the present invention will be further considered within the scope of the following detailed description and easily deduced from the effects thereof.

According to an aspect of the present invention, there is provided a pipe coupling for coupling two pipes connected to each other, the pipe coupling having an inner circumferential surface formed in an arcuate shape so as to surround an upper portion of the pipe connecting portion. A first member having a pair of flanges protruding from both sides of the body and having through holes; And a pair of flange portions protruding from both sides of the body portion and having through holes formed therein, wherein the flange portions are formed on both sides of the body portion, Two members; A bolt inserted into the through-hole of the first member and the second member, the bolt including a head portion and a thread portion, the insertion portion being formed in the threaded portion at a predetermined distance or more from the head portion; A nut fastened to the bolt; And a marker which is fitted in the insertion groove portion of the bolt.

According to the present invention, it is preferable that the insertion groove portion is formed in an annular shape along the periphery of the screw portion.

In an embodiment of the present invention, the marker includes a fitting plate having a slot formed to fit in the insertion groove of the threaded portion, a connecting portion bent and extended from the fitting plate, and a connecting portion bent from the connecting portion, As shown in Fig.

The first member or the second member is formed with an insertion portion into which the mounting portion can be inserted. The markers are fixed in place by fitting together the bolt and insert.

On the other hand, the markers can be made of plastic or rubber material.

The pipe coupling according to the present invention can structurally prevent the pipe coupling from being loosely coupled without being normally engaged due to a mistake or carelessness of the operator.

That is, the insertion groove is formed in the threaded portion of the bolt, and the marker can be inserted into the insertion groove only when the nut is fastened beyond the insertion groove. In other words, bolts and nuts must be fastened to a certain depth or more to install markers.

It is a very simple method, but it provides a guide for the operator to perform the pipe coupling tightly, and it is easy for anyone to know whether or not the work is completed, so that the danger due to the inadequate installation can be prevented.

On the other hand, even if the effects are not explicitly mentioned here, the effect described in the following specification, which is expected by the technical features of the present invention, and its potential effects are treated as described in the specification of the present invention.

1 is a schematic perspective view of a conventional flow pipe coupling.
Figure 2 is a schematic side view of the pipe coupling shown in Figure 1;
3 is a schematic side view of a state before a conventional fixed pipe coupling is fully engaged with a pipe.
Figure 4 is a schematic side view of the fixed pipe coupling shown in Figure 3 fully coupled to the pipe.
FIGS. 5 and 6 are photographs of a site showing a state in which a pipe coupling is conventionally installed.
FIG. 7 is an exploded perspective view of a pipe coupling and a marker before coupling according to an embodiment of the present invention. FIG.
8 is a perspective view showing a state in which the coupling is completed in the state of FIG.
Figure 9 is a schematic cross-sectional view of Figure 8;
10 is a cross-sectional view showing a state in which the connection between the bolt and the nut is incomplete.
BRIEF DESCRIPTION OF THE DRAWINGS The above and other features and advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may obscure the subject matter of the present invention.

Hereinafter, a pipe coupling according to an embodiment of the present invention will be described in more detail with reference to the accompanying drawings.

FIG. 7 is an exploded perspective view of a pipe coupling according to an embodiment of the present invention, and FIG. 8 is a perspective view of a state where the coupling is completed in the state of FIG. 7, and FIG. 9 is a sectional view taken along line A-A of FIG.

7 to 9, a pipe coupling 100 according to an embodiment of the present invention includes a first member 10 and a second member 20, a bolt 30, a nut 40, 50).

The first member 10 has an arc-shaped inner circumferential surface so as to surround the upper portion of a portion where two pipes abut (a pipe connecting portion). Likewise, the second member 50 has an arc-shaped inner peripheral surface so as to surround the lower side of the pipe connecting portion.

Flanges 11 and 21 protrude from both sides of the first member 10 and the second member 50 and through holes 12 and 22 are formed in the flange portions 11 and 21.

The bolt 30 is inserted into the through hole 12 of the first member 10 and the through hole 22 of the second member 20 in a state where the first member 10 and the second member 20 wrap the pipe connecting portion together And the coupling of the first member 10 and the second member 20 is completed by fastening the nut 40. [ The two pipes are interconnected by a pressing force when the first member 10 and the second member 20 are engaged. A ring shaped gasket made of a compressible material such as rubber is interposed between the inner peripheral surface of the first member 10 and the outer peripheral surface of the pipe connecting portion,

The most important point when the pipes are connected using the pipe coupling 100 having the above-described configuration is that both sides of the pipe coupling 100 must be tightened to a certain depth. If bolts and nuts are tightened too tightly on either side, the bolts can not be tightened on the other side. Piping The accident or failure at the site is mainly due to the above precautions when connecting pipe couplings. Since the pipe coupling has a very simple configuration, other physical defects rarely occur. When the operator installs the pipe couplings, the bolts and nuts must be tightened beyond a certain level, but the tightness of both sides of the coupling must be similar to each other. In the case of the novice worker, the bolt can be restrained because it appears to be tightened tightly if it is tightened.

That is, even if the operator is a novice or a skilled person, the pipe coupling may not be correctly installed due to carelessness.

In order to solve the above-mentioned problems, the present invention does not rely on skill or attention of the operator, but guides the work by installing markers that can be normally fastened to the bolts and nuts.

For this purpose, a bolt 30 having a special structure is used in the present invention. The bolt 30 used in the present invention has a screw portion 32 having a head portion 31 and a screw thread like the ordinary bolt. And an insertion groove 33 is formed on one side of the threaded portion 32. [ In the present embodiment, the insertion groove portion 33 is formed in a ring shape concave along the circumferential direction of the threaded portion 32. Generally, bolts used for pipe coupling are high tension bolts and manufactured by themselves without using ready-made products. Therefore, even if the insertion groove portion is made by cutting the threaded portion, the strength of the bolt is not hindered.

The insertion groove portion 33 acts as a reference line on which the nut 40 is to be fastened. The nut 40 should be fastened deeper than the insertion groove 33. Fig. 9 shows a state in which they are normally fastened, and Fig. 10 shows a state in which they are fastened inappropriately. Referring to FIG. 9, the nut 40 is deeply fastened to confirm the insertion groove 33 of the bolt from the outside. However, in FIG. 10, the fastening depth between the bolt and the nut is weak, so that the insert groove portion 33 is covered by the nut 40. That is, the operator can tighten the nut deeply until the insertion groove portion 33 is seen. When the bolt is tightened too tightly at one side of the pipe coupling, it is difficult to fasten the bolt to the other side beyond the insertion groove portion 33, so that the bolt at one side is unfastened again to adjust the tightening strength. As a result, the operator can tighten all the bolts on both sides of the pipe coupling beyond the reference point to reduce the installation defects.

Furthermore, according to the present invention, by inserting the marker 50 into the insertion groove 33 of the bolt 30, both the operator and the supervisor can easily confirm that the operation is normally completed.

The marker 50 is inserted into the insertion groove 33 of the bolt and serves to inform that the bolt is normally fastened. That is, only when the bolt and the nut are normally fastened, the insertion groove portion 33 is exposed to the outside and the marker 50 can be inserted into the insertion groove portion 33. If the fastening of the bolt and the nut is not suitable, the insert groove 33 may be covered by the nut 40 and the marker 50 can not be installed.

In this embodiment, the marker 50 includes a fitting plate 51, a connecting portion 52 bent and extended from the rear end of the fitting plate 51, and a second connecting portion 52 bent again from the connecting portion 52 to form the first member 10 or the second And a mounting portion 53 which is fixed to the flange portions 11 and 21 of the member 20. In this embodiment, the marker 50 is made of a plastic material having elasticity.

A slot 54 is formed in the fitting plate 51. The slot 54 is inserted into the insertion groove portion 33 of the bolt 30. At the front end of the slot 54, the guide portion 55 is formed to be wider than the slot 54 so that the bolt 40 can be easily inserted. The diameter of the slot 54 is larger than that of the insertion groove 33 but smaller than the thread 32 of the bolt 30. [ That is, if the slot 54 has an excessively large diameter, it can be fitted anywhere in the threaded portion 32 in addition to the insertion groove portion 33.

The mounting portion 53 is for preventing the fitting plate 51 from being rotated in the state where the fitting plate 51 is fitted in the bolt 30, and for fixing the position. The mounting portion 53 is mounted to the insertion portion 29 formed in the flange portions 11 and 21 of the first member 10 or the second member 20. The fitting plate 51 of the marker 50 is fitted into the insertion groove 33 of the bolt 30 and the mounting portion 53 of the marker 50 is fitted into the insertion portion 29 of the first member or the second member The land marker 50 can be fixed in position.

As described above, in the present invention, the insertion groove 33 is formed in the bolt 30 so that the baseline of the depth at which the bolt and the nut are to be fastened can be visually observed, thereby clearly guiding the installation work of the operator.

Further, the markers 50 are provided on the insertion groove 33 so that the operator can visually confirm the completion of the work as well as the operator.

These two measures allow the operator to avoid installation defects that may be caused by the inexperience of the novice or carelessness or error of the master. The operator confirms that the bolt on both sides of the pipe coupling exposes the insertion groove, completes the tightening operation, and installs the markers to confirm that the tightening is normally completed.

Supervisors can avoid work flaws by ensuring that the markers are properly installed without having to inspect every single pipe pipe coupling at the pipe installation site.

However, the present invention is not limited thereto. For example, the screw may be formed in a deep groove in one direction, and the markers may be elongated in one direction to be inserted into the groove, Structure can also be adopted. That is, the insert groove and the markers can be anything that is selected as a structure that can visually confirm the degree of tightening between the bolt and the nut.

The scope of protection of the present invention is not limited to the description and the expression of the embodiments explicitly described in the foregoing. It is again to be understood that the present invention is not limited by the modifications or substitutions that are obvious to those skilled in the art.

100: Pipe coupling
10: first member, 11: flange portion, 12: through hole
20: second member, 21: flange portion, 22: through hole, 29: insertion portion
30: bolt, 31: head portion, 32: screw portion, 33:
40: nut, 50: marker, 51: fitting plate, 53: mounting portion

Claims

And two pipes connected to each other to be connected to each other,
A first member having a body portion having an inner circumferential surface formed in an arc shape so as to surround an upper portion of the pipe connection portion and a pair of flange portions protruding from both sides of the body portion and having through holes;
And a pair of flange portions protruding from both sides of the body portion and having through holes formed therein, wherein the flange portions are formed on both sides of the body portion, Two members;
A bolt inserted into the through-hole of the first member and the second member, the bolt including a head portion and a thread portion, the insertion portion being formed in the threaded portion at a predetermined distance or more from the head portion;
A nut fastened to the bolt; And
And a marker placed in the insertion groove of the bolt,
Wherein the marker includes a fitting plate having a slot formed in the insertion groove portion of the screw portion,
A connecting portion bent and extended from the fitting plate,
And a mounting portion bent from the connecting portion to be fixed to the first member or the second member,
Wherein the first member or the second member is provided with an insertion portion into which the mounting portion can be inserted.

The method according to claim 1,
And the insertion groove portion is formed in an annular shape along the circumference of the threaded portion.

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