WO2014175691A1

WO2014175691A1 - Leak detector

Info

Publication number: WO2014175691A1
Application number: PCT/KR2014/003641
Authority: WO
Inventors: Ha Ik Jeong
Original assignee: Ha Ik Jeong
Priority date: 2013-04-26
Filing date: 2014-04-25
Publication date: 2014-10-30
Also published as: KR101429616B1

Abstract

Provided is a leak detector that is used in a pipe and can detect a leak and stop fluid from being supplied. The leak detector includes a valve having an internal channel that is selectively closed, a case forming a space for receiving the valve; and a leak pad disposed at a side of the valve and expanding and pressing and moving the valve when the leak pad comes in contact with fluid, in which the valve includes a channel switch portion opening/closing the channel in accordance with rotation positions and a valve cap connected with the channel switch portion and transmits rotation force to the channel switch portion, the valve cap and the case have cap rotation guides corresponding to each other and guide grooves formed at an angle, when the leak pad expands and pushes up the valve, the valve cap is rotated by the cap rotation guides and the guide grooves and rotation force is transmitted to the channel switch portion, such that the channel is closed by the channel switch portion, and a valve seat for installing the valve and guiding the valve moved by the expansion of the leak pad is formed at the case. Accordingly, when a leak is generated, it is possible to more easily detect the leak and effectively close the channel when a leak is detected. Further, the detector can be easily dissembled and installed for reusing.

Description

LEAK DETECTOR

The present invention relates to a leak detector that can detect a leak and stop fluid from being supplied.

In general, a leak detector for detecting a leak of fluid is disposed in a pipe for carrying or supplying fluid.

FIG. 1 is a view illustrating a leak detector for a water purifier which is an example of the related art, in which an internal space is defined by a body 4 and a cover 5 and water supplied through a hose 9 is automatically stopped when a leak occurs by operating a lever connected with a ball valve 15 by means of a paper band, a coil spring 14, and an elastic member 6 in the internal space.

That is, the paper band 1 is cut, when it gets wet with leaking water. When the paper ban 1 is cut, a movable member 8 is opened away from a fixed member 7 by an elastic restoring force of the coil spring 14 and turns the lever 12.

Further, the lever 12 is connected with a valve ball 10 in a valve body 11, such that the valve ball 10 rotates and the passage of the hose 9 can be closed.

However, in the structure of detecting a leak, using the paper band 1, the paper band 1 may get wet when it is installed, or the paper ban 1 may get wet to operate the detector even with a small amount of water that is generated when a filter is replaced, for example.

Further, the paper band 1 tears to operate the detector with a small amount of water, whereas the paper band 1 may not be cut even if it gets wet, and accordingly, detection of a leak is not stable and the operational reliability is deteriorated.

For solving the problem, an operation structure of a leak detector for a water purifier as another example of the related art is illustrated in FIG. 2.

Referring to FIG. 2 illustrating another example of the related art, the detector includes a water inlet port 50 that communicates with a water supplier, a water outlet port 52 that communicates with a water purifier, a top case 54 with an internal water channel that connects the water inlet port 50 and the water outlet port 52, a bottom case 56 that is fixed to the bottom of the top case 54 and receives a contracting member 55 that expands when it absorbs water that leaks from the purifier and flows inside through the bottom, a check plunger 57 that is movably coupled to open/close the water channel and stops water from flowing from the water inlet port 50 to the water outlet port 52 by closing the water channel while being moved by an elastic restoring force of an elastic member 63 when the contracting member 55 expands, and a stopper 64 that keeps the water channel open by pressing the check valve plunger 57 in the top case 54 and moves away from the pressing side of the check valve plunger 57 to close the water channel when the contracting member 55 expands.

That is, the stopper 64 has a first locking step 65 that is inserted in a locking hole formed through the bottom of the top case 54 when the water channel 53 is opened with the check valve plunger 57 pressed by the stopper 64 and a second locking step 66 that prevents the stopper 64 from separating from the top case 54 when the water channel is closed by the check valve plunger 57 due to expansion of the contracting member 55.

Accordingly, when water leaks from the purifier, the leaking water collect on the bottom of a sink, and when the leaking water is absorbed through a groove formed through the bottom of the bottom case 56, the contracting member 55 expands.

A support plate fixed to the contracting member 55 moves up in the bottom case 56 with the expansion of the contracting member 55 and the second locking step 66 of the stopper 64 is pressed up and elastically deformed by the support plate moving up, such that the first locking step 65 of the stopper 64 is separated from the locking hole.

Accordingly, since the second locking step 66 is supported in the locking hole, the stopper 64 is prevented from separating from the top case 54.

Further, the check valve plunger 57 is pressed to the right by the elastic restoring force of the elastic member 63 and the water pressure applied to the check valve plunger 57, such that the water channel is closed. The stopper 64 is moved to the right in the top case 54 by the check valve plunger 57.

That is, the water channel is hermetically closed by an O-ring 57a on the check valve plunger 57. Accordingly, the water that flows into the top case 54 through the water inlet port 50 from the water supplier and moves to the water outlet port 52 is stopped.

However, several steps are performed in the example of the related art, in which when a leak is detected, the contracting member 55 expands and deforms the stopper 64 and the stopper 64 is moved by the deformation of the stopper 64, such that the plunger 57 restricted by the elastic member 63 and the stopper 64 moves and closes the channel of water.

Therefore, in the related art that closes the channel of water through several steps when water leaks, the components are organically combined, such that the work for assembly and dissembling the device increases.

Further, when several components are combined, the possibility of an error in design and assembly of the components increases, such that the closing operation due to a leak is not performed well and the reliability of the product decreases.

An object of the present invention is to provide a leak detector that can be assembled and dissembled.

Another object of the present invention is to provide a leak detector that closes a channel by changing an expansion force of a leak pad, which expands when a leak is detected, into rotation force.

Another object of the present invention is to provide a leak detector that allows a user to easily know the exact installation position when assembling.

Another object of the present invention is to provide a leak detector that can adjust leak detection sensitivity by changing the shape and position of a leak pad.

A leak detector of the present invention includes a valve having an internal channel that is selectively closed; a case forming a space for receiving the valve and a leak pad disposed at a side of the valve and expanding and pressing and moving the valve when the leak pad comes in contact with fluid, in which the valve includes a channel switch portion opening/closing the channel in accordance with rotation positions and a valve cap connected with the channel switch portion and transmits rotation force to the channel switch portion, the valve cap and the case have cap rotation guides corresponding to each other and guide grooves formed at an angle, when the leak pad expands and pushes up the valve, the valve cap is rotated by the cap rotation guides and the guide grooves and rotation force is transmitted to the channel switch portion, such that the channel is closed by the channel switch portion, and a valve seat for installing the valve and guiding the valve moved by the expansion of the leak pad is formed at the case.

The guide grooves are curved upward on the side of the case.

Cap rotation guides are formed on the valve cap, when the cap rotation guides are positioned at the lower ends of the guide grooves, the channel switch portion is fully opened, and when the cap rotation guides are positioned at the upper ends of the guide grooves, the channel switch portion is fully closed.

Slopes that protrude inward and interfere with seating and moving of the valve are further formed in the valve seat.

A pad support for supporting the leak pad at a predetermined height is further formed in the case.

A height-adjusting portion for adjusting the supporting height of the leak pad is further formed at the pad support.

The leak pad has a larger diameter at the upper part than the lower part and the upper part of the leak pad is seated on the pad support.

The guide grooves are curved downward on the side of the valve cap.

As for the leak detector, in which cap rotation guides protruding inward are formed on the case, when the cap rotation guides are positioned at the upper ends of the guide grooves, the channel switch portion is fully opened, and when the cap rotation guides are positioned at the lower ends of the guide grooves, the channel switch portion is fully closed.

According to the present invention, when a leak is detected by the leak pad in the case, the leak pad expands and pushes up the valve.

Further, as the valve is pushed up, the valve cap coupled to the channel-closing member in the valve rotates along the upward-curved guides formed on the case and rotates the channel-closing member, such that the channel-closing member closes the fluid supply passage by rotating.

That is, in the present invention, since the expansion force of the leak pad is changed into rotation force by the coupling relationship of the guide grooves formed at the case, the valve cap, and the channel-closing member, it is possible to close the fluid supply passage with a simple structure.

Further, in the present invention, since the leak pad is stepped to be divided into an upper part and a lower part and the pad seat formed in the case supports the upper part of the leak pad, such that it is possible to adjust leak detection sensitivity by adjusting the supporting height of the pad seat.

Further, in the present invention, since the slopes protruding inward are formed in the valve seat in which the valve is seated and which forms a vertical passage of the valve when the leak pad expands, when a user pushes the valve into the valve seat to mount the valve, it is possible to easily see that the valve is completely mounted by the slopes.

Further, when the valve is moved up by the expansion of the leak pads, interference is generated between the valve and the slopes, such that the valve cannot be moved up to the critical points where the interfering force is removed. When the interfering force is removed, a thrust force generated when the restriction is removed is added to the expansion force of the leak pad and the valve can be rotated by larger force.

Accordingly, the valve cap and the channel-closing member connected to the valve cap can be more effectively rotated.

FIG. 1 is a view illustrating a leak detector for a water purifier that is an example of the related art;

FIG. 2 is a view illustrating the operation structure of a leak detector for a water purifier that is another example of the related art;

FIGS. 3 and 4 are views illustrating an embodiment of a leak detector according to the present invention;

FIG. 5 is an exploded perspective view illustrating the detail of the configuration of the leak detector according to the present invention;

FIG. 6 is a view illustrating the detail of the configuration of a valve that is one of the main parts of the present invention;

FIGS. 7 and 8 are views illustrating a channel-closing structure when a leak is detected, in the leak detector according to the present invention;

FIG. 9 is a view illustrating another embodiment of the present invention.

FIG. 10 is a cross-sectional view taken along line B-B of FIG. 9;

FIG. 11 is a view illustrating adjustment of leak detection sensitivity in the embodiment illustrated in FIG. 9;

FIG. 12 is a view illustrating a slope formed on a case that is one of the main parts of the present invention;

FIG. 13 is a view illustrating a process of mounting a valve on the case;

FIGS. 14 to 16 are views illustrating another embodiment of the present invention; and

FIG. 17 is a view illustrating another embodiment of a case and a valve cap that are ones of the main parts of the present invention.

Hereinafter, detailed embodiments of the present invention will be described with reference to the accompanying drawings. However, the spirit of the present invention is not limited to the embodiments and those understanding the spirit of the present invention may easily propose other embodiments within the spirit.

FIGS. 3 and 4 exhibit an embodiment of a leak detector according to the present invention and FIG. 5 is an exploded perspective view illustrating the detail of the configuration of the leak detector according to the present invention.

Referring to the figures, a leak detector 100 according to the present invention includes a valve 400 that form a passage for fluid and closes a channel, a case 200 that forms a space for receiving the valve 400, and a leak pad 600 that is disposed under the valve 400 in the case 200 and pushes up the valve 400 by expanding when fluid comes in contact with it.

In detail, the case 200 is formed substantially in the shape of a cylinder with the top open and the leak pad 600 and the valve 400 are mounted through the open top.

A leak-sensing hole 212 is formed through the bottom of the case 200 so that the leak pad 600 can come in contact with fluid and fixing portions 210 are formed at the lower portion of the case 200 to fix the case.

The fixing portions 210 protrude outward from the lower end of the case 200 to be fixed by fasteners and at least one fixing portion may be formed.

A valve seat 240 where the valve is mounted 400 and that guides the valve 400 when the valve moves up/down is formed through the side of the case 200.

That is, the valve seat 240 is formed in a concave shape on the side of the case 200 to corresponding to an inlet port 442 and an outlet port 444 of the valve 400 for connection with a pipe, such that the valve that is mounted can be guided with the inlet port 442 and the outlet port 444 in contact with the valve seat 240.

Further, when the leak pad 600 pushes up the valve 400 by expanding, the valve 400 can be guided up with the inlet port 442 and the outlet port 444 in contact with the valve seat 240.

One or more guide grooves 220 with an upward inclination is formed at the case 200 and cap rotation guide 422 of a valve cap 420, which is connected with a channel switch portion 480 for opening/closing the internal channel of the valve 400 and rotates with movement along the guide grooves 220, are received in the guide grooves 220.

FIG. 6 is a view illustrating the detail of the configuration of a valve that is one of the main parts of the present invention.

Referring to FIG. 6, the valve 400 includes a valve body 440 with an internal space formed so that the top and the left and right sides communicate with each other, the channel switch portion 480 that is mounted on the open top of the valve body 440 and selectively opened/closed at left and right sides, and the valve cap 420 that is coupled to the top of the channel switch portion 480 and rotates the channel switch portion 480.

In detail, the internal space of the valve body 440 forms a channel through which fluid moves and the channel switch portion 480 is inserted in the center of the valve body 440 and selectively opens/closes the left-right channel of the valve body 440 in accordance with the rotational position.

That is, fittings for connection with a pipe are connected to the left and right sides of the valve body 440 and form the inlet port 442 and the outlet port 444, respectively, and an inlet 442′and an outlet 444′are formed in the valve body 440, corresponding to the inlet port 442 and the outlet port 444.

Connection holes 482 are formed in the channel switch portion 480, at positions corresponding to the inlet 442′and the outlet 444′ such that the connection holes 482 communicates with the inlet 442′and the outlet 444′and opens the channel in accordance with the rotational position of the channel switch portion 480.

That is, the passage for fluid is connected when the connection hole 482 is aligned with the inlet 442′and the outlet 444′by rotation of the channel switch portion 480. Further, when the connection hole 482 does not communicate with the inlet 442′and the outlet 444′by operation of the channel switch portion 480, a channel-closing member 484 of the channel switch portion 480 closes the channel, corresponding to the inlet 442′and the outlet 444′.

The channel-closing member 484 may be made of rubber to be able to seal the channel and a seat for mounting the channel-closing member 484 may be formed at the channel switch portion 480 by cutting or recessing a portion of the side.

The channel switch portion 480 rotates in the valve body 440 to open/close the channel, as described above, and to this end, the valve cap 420 is coupled to the top of the channel switch portion 480 so that rotation force can be transmitted.

FIGS. 7 and 8 are views illustrating a channel-closing structure when a leak is detected, in the leak detector according to the present invention.

Referring to these figures, the channel switch portion 480 is mounted at the center of the valve body 440 through the open top and the valve cap 420 is mounted on the top of the channel switch portion 480.

To this end, a cap mounting portion 481 to which the valve cap 420 is coupled is formed at the upper portion of the channel switch portion 480 and a cap rotation shaft 425 that is coupled to the cap mounting portion 481 and forms a rotation center is connected to the bottom of the valve cap 420.

That is, the cap rotation shaft 425 may be, as illustrated in FIG. 7, forcible fitted in the center of the cap mounting portion 481 and may have a thread so that the channel switch portion 480 can rotate when the valve cap 420 rotates.

A guide groove 446 that guides the valve cap 420 rotating may be further formed at the upper portion of the valve body 440 and a protrusion that is disposed in the guide groove 446 and guides the valve cap 420 rotating may be further formed at the valve cap 420.

A sealing member 450 may be further disposed in the valve body 440 to prevent fluid from leaking through the channel switch portion 480.

When the valve cap 420 and the channel switch portion 480 are combined, the valve 400 is mounted on the valve seat 240 of the case 200 and the cap rotation guide 422 is received in the guide groove 220.

That is, when the leak detector according to the present invention is assembled in the shape illustrated in (a) of FIG. 8, the connection hole 482 communicates with the inlet 442 and the outlet 444 , thereby forming a channel.

In the present invention, when the cap rotation guide 422 is positioned under the guide groove 220, the connection hole 482, inlet 442 , and outlet 444 are connected such that the channel switch portion 480 is fully opened. Further, when the cap rotation guide 422 is positioned above the guide groove 220, the channel-closing member 484 seals the inlet 442 and the outlet 444 such that the channel switch portion 480 is rotated at 90 and full closed.

On the other hand, the leak detector 100 according to the present invention is positioned at a place where it detects a leak in the state described above and then fixed by the fixing portions 210, and when a leak occurs with the leak detector mounted, the liquid is absorbed to the leak pad 600 through the leak detection hole 212 and the lead pad 600 expands.

Further, as the leak pad 600 expands, the valve 400 over the leak pad 600 is pushed up, and as the valve 400 is pushed up, the cap rotation guide 422 in the guide groove 220 moves up along the guide groove 220 and rotates the valve cap 420.

As the valve cap 420 rotates, the channel switch portion 480 connected with the valve cap 420 rotates, and when the cap rotation guide 422 is positioned on the upper end of the guide groove 220, as in (b) of FIG. 8, the channel-closing member 484 of the channel switch portion 480 is positioned to correspond to the inlet 442′and the outlet 444′ such that the channel is closed, as in (b) of FIG. 7.

When the channel is closed through the process described above, it is possible to see that the supply of fluid is stopped and a user who sees it makes the leak detector 100 be reusable by separating the valve 400 from the case 200 and replacing the expanding leak pad 600.

The following example is possible to adjust leak detection sensitivity in the present invention.

FIG. 9 illustrates another embodiment of the present invention and FIG. 10 is a cross-sectional view taken along line B-B of FIG. 9.

Referring to these figures, in another embodiment of the present invention, the shapes of the case 200 and the leak pad 600 are different and the operation structure and the other components are the same, so the differences are described in priority.

In another embodiment of the present invention, the leak pad 600 received in the case 200 is stepped to be vertically divided and a specific pad support 260 is further formed so that the leak pad 600 having this shape can be seated.

In detail, the leak pad 600 has a larger diameter at the upper part than the lower part, as illustrated in FIG. 10, and the pad support 260 is configured such that the upper part of the leak pad 600 is mounted and supported thereon.

That is, the pad support 260 is formed in the shape of a thin plate with the upper portion protruding inward further than the lower portion and provides a step where the leak pad 600 can be mounted, and at least two or more pairs of pad supports 260 are provided to stably support the leak pad 600.

The step of the pad support 260 is positioned at a predetermined height upward from the leak detection hole 212 in which fluid flows and supports the leak pad 600, such that the leak detector 100 does not operate until the fluid flowing inside from the leak detection hole 212 reaches a predetermined height D, and accordingly, it is possible to adjust sensitivity of the leak detector 100 by adjusting the height of the step.

FIG. 11 is a view illustrating adjustment of leak detection sensitivity in the embodiment illustrated in FIG. 9.

Referring to the figure, a height-adjusting portion 262 for adjusting the mounting height of the leak pad 600 is further formed at the pad support 260 supporting the leak pad 600.

In detail, the height-adjusting portions 262 are slits formed at the lower portion of the pad support 260 and they are formed with regular intervals at the pad supports 260.

The slits allows a user to easily remove the pad support 260 and to change the supporting height of the leak pad 600 and they are laterally elongated at the lower portions of the pad supports 260, such that the user can easily remove it with low force.

Accordingly, the user can determine the support height of the leak pad 600 separately when the mounting height of the leak pad 600 is“D〃 and the leak pad 600 comes in contact with fluid and when the mounting height of the leak pad 600 is “D1〃to“D2〃and the leak pad comes in contact with fluid, such that it is possible to easily adjust sensitivity for leak detection.

In another embodiment of the present invention, a user can more easily check whether the valve 400 is mounted on the valve seat 240 of the case.

FIG. 12 is a view illustrating a slope formed on a case that is one of the main parts of the present invention and FIG. 13 is a view illustrating a process of mounting a valve on the case.

Referring to these figures, in another embodiment of the present invention, slopes 280 are further formed on the valve seat 240, such that when the valve 400 is mounted, the inlet port 442 and the outlet port 444 are interfered with the slopes 280.

In detail, the slopes 280 are convex portions protruding into the valve seat 240 and the protruding height decreases as it vertically goes away from the center portion.

The slopes 280 are positioned such that the inlet port 442 and the outlet port 444 are not pressed by the protruding center portions when they are mounted on the valve seat 240 and the height of the protruding center portions of the slopes 280 are determined to be included in the range of deformation due to the characteristics of the materials of the inlet port 442 and the outlet port 444 or the case 200, such that the case 200 or the inlet port 442 and the outlet port 444 can be mounted without damage.

To this end, the case 200 may be made of plastic or metal and the inlet port 442 and the outlet port 444 may also be made of rubber or plastic.

When the slopes 280 are formed, as described above, a user can feel interference when the valve 400 comes in contact with the slopes 280 while pushing the valve 400 into the valve seat 240 in order to mount the valve 400 into the case 200.

Further, when the user pushes the valve 400 with larger force with the interference generated, the valve 400 passes the slopes 280 with deformation of the case 200 or the inlet port 442 and the outlet port 444 and the user can know mounting is completed.

Other than the mounting, the slopes 280 can enable the channel switch portion 280 to close the channel more quickly by changing the moving-up speed of the valve 400, when a leak is detected by the leak pad 600.

In detail, when a leak is generated with the leak detector 100 according to the present invention installed and fluid flows inside through the leak detection hole 212, the leak pad 600 expands while absorbing the fluid flowing inside.

As the leak pad 600 expands, the valve 400 is pushed up by the leak pad 600, and when the expansion force increases over a critical point of the restricting force of the slopes 280 restricting the valve 400, a thrust force by the slopes 280 is added to the expansion force and the valve 400 is moved more quickly while passing the slopes 280.

As the valve 400 moves up at a high speed, as described above, the cap rotation guide 422 formed on the valve cap 420 moves at a high speed along the guide groove 220 and the valve cap 420 rotates.

As the valve cap 420 rotates, the channel switch portion 480 connected with it is rotated and positioned such that the channel-closing member 484 is positioned to correspond to the inlet 442 and the outlet 444 , such that the cannel can be more quickly closed.

The leak detector 100 according to the present invention may be implemented in the following embodiment.

FIGS. 14 to 16 are views illustrating another embodiment of the present invention.

Referring to these figures, the valve cap 420 of the previous embodiments is disposed under the valve body 400 and moved up with rotation by expansion of the leak pad 600.

That is, in another embodiment of the present invention, the leak pad 600, valve cap 420, and valve body 440 are sequentially disposed in the case 200 and the cap rotation guide 422 formed on the valve cap 420 moves along the guide groove 220 formed at the case 200, such that the channel can be closed when a leak is detected, similar to the previous embodiments.

Further, when the valve cap 420 is disposed under the valve body 440, the size of the case 200 can be decreased and spatial usability can be increased, as compared with the previous embodiments.

The leak detection hole 212 formed at the lower portion of the case 200 may include a plurality of holes formed at the bottom of the case 200 and a side hole formed at the lower end of the side of the case 200.

In another embodiment of the present invention, the cap rotation guide 290 may be formed on the case 200 and the guide groove 424 may be formed on the valve cap 420 so that the valve cap 420 rotates.

For detailed description, FIG. 17 is a view illustrating another embodiment of a case and a valve cap that are ones of main parts of the present invention.

In the following description, the guide grooves 220 and the cap rotation guides 422 that are the same components as those of the previous embodiments are described as guide grooves 424 and cap rotation guides 290 in accordance with the formed position in this embodiment and the other components are given the same names and reference numbers.

Referring to the figure, the cap rotation guides 290 protrude inward are formed on the inner side of the case 200.

The guide grooves 424 having a downward inclination are formed through the side of the valve cap 420, such that the cap rotation guides 290 are positioned at the upper ends of the guide grooves 424.

Accordingly, when a leak is detected by a leak pad 600 with the leak pad 600 received in the case 200 and a valve 400 seated with a valve cap 420 positioned over the leak pad 600, the leak pad 600 expands and pushes up the valve cap 420.

As the valve cap 420 is pushed up, the valve cap 420 is rotated by the cap rotation guides 290 received in the guide grooves 424 and rotates the channel switch portion 480 (see FIG. 7) connected therein, such that the internal channel of the valve 400 can be closed.

That is, when guide grooves 424 are curved downward on the side of the valve cap 420 and the cap rotation guides 290 keeping the fixed position are received at the upper ends of the guide grooves 424, such that the valve cap 420 can rotate while being moved up by the leak pad 600.

Further, in this embodiment having the configuration, when the cap rotation guides 290 are positioned at the upper ends of the guide grooves 424, the internal channel of the valve 400 is fully opened, and when the cap rotation guides 290 are positioned at the lower ends of the guide grooves 424, the internal channel of the valve 400 is fully closed.

Accordingly, in another embodiment of the present invention, similarly, the leak detector is positioned at a place where it detects a leak and then fixed by the fixing portions 210, and when a leak occurs with the leak detector mounted, the liquid is absorbed to the leak pad 600 through the leak detection hole 212 and the lead pad 600 expands.

Further, as the leak pad 600 expands, the valve 400 over the leak pad 600 is pushed up, and as the valve 400 is pushed up, the valve cap 420 is rotated by the operation of the guide grooves 424 and the rotation guides 290.

As the valve cap 420 rotates, the channel switch portion 480 connected with the valve cap 420 rotates, such that the channel is closed.

According to the present invention, when a leak is generated, it is possible to more easily detect the leak and effectively close the channel when a leak is detected. Further, the detector can be easily dissembled and installed for reusing.

Accordingly, the present invention is can be widely utilized to detect leaks in the art.

Claims

A leak detector comprising:

a valve having an internal channel that is selectively closed;

a case forming a space for receiving the valve; and

a leak pad disposed at a side of the valve and expanding and pressing and moving the valve when the leak pad comes in contact with fluid,

wherein the valve includes a channel switch portion opening/closing the channel in accordance with rotation positions and a valve cap connected with the channel switch portion and transmits rotation force to the channel switch portion,

the valve cap and the case have cap rotation guides corresponding to each other and guide grooves formed at an angle,

when the leak pad expands and pushes up the valve, the valve cap is rotated by the cap rotation guides and the guide grooves and rotation force is transmitted to the channel switch portion, such that the channel is closed by the channel switch portion,

and

a valve seat for installing the valve and guiding the valve moved by the expansion of the leak pad is formed at the case.
The leak detector of claim 1, wherein the guide grooves are curved upward on the side of the case.
The leak detector of claim 2, wherein cap rotation guides are formed on the valve cap, when the cap rotation guides are positioned at the lower ends of the guide grooves, the internal channel of the valve is fully opened, and when the cap rotation guides are positioned at the upper ends of the guide grooves, the internal channel of the valve is fully closed.
The leak detector of claim 1, wherein slopes that protrude inward and interfere with seating and moving of the valve are further formed in the valve seat.
The leak detector of claim 1, wherein a pad support for supporting the leak pad at a predetermined height is further formed in the case.
The lead detector of claim 5, wherein a height-adjusting portion for adjusting the supporting height of the leak pad is further formed at the pad support.
The leak detector of claim 5 or 6, wherein the leak pad has a larger diameter at the upper part than the lower part and the upper part of the leak pad is seated on the pad support.
The leak detector of claim 1, wherein the guide grooves are curved downward on the side of the valve cap.
The leak detector of claim 8, wherein cap rotation guides protruding inward are formed on the case, when the cap rotation guides are positioned at the upper ends of the guide grooves, the internal channel of the valve is fully opened, and when the cap rotation guides are positioned at the lower ends of the guide grooves, the internal channel of the valve is fully closed.