KR20180067165A - Non-powered water leakage blocking apparatus - Google Patents

Abstract

The water leakage preventing device according to an embodiment of the present invention comprises: a valve case disposed on an inner bottom surface of a product on which the water leakage preventing device is installed, including an inlet port formed on one side, an outlet port formed on the other side, and a connecting flow path for connecting the inlet port and the outlet port; a valve cover covering an opened upper surface of the valve case; a volume changing member disposed inside the valve case and expanding when water which leaks to the bottom surface is absorbed; and a flow path shutoff valve placed in front of the volume changing member and moving in a lateral direction by expansion of the volume changing member to shut off the outlet port.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

The present invention relates to a leakage preventing device that does not require a power source for driving.

A product which is characterized by a large amount of water flowing inside, such as a water purifier, is provided with a water leakage preventing device on the bottom of the product in order to detect the leakage and quickly shut off.

The prior art described below relates to a water leakage prevention device that closes a water supply passage by using a volumetric deforming portion that does not need a power source and absorbs water leaking to expand in volume.

Korean Patent Publication No. 10-2011-0090415 (August 10, 2011)

The leakage preventing device disclosed in the prior art has the following disadvantages.

First, water passing through the water leakage blocking device flows in a horizontal direction orthogonal to gravity, and a flow barrier rod for blocking the water leakage inside the water leakage blocking device moves in the same vertical direction as the gravity direction. Therefore, the water leakage preventing device is formed long in the vertical direction, and there is a problem that the volume loss of the bottom portion of the household electric appliance provided with the water leakage preventing device increases.

For example, the bottom surface of the water receptacle provided in the case internal space of the water purifier provided with the water leakage preventing device is located at a position higher than the upper end of the water leakage preventing device in order to avoid interference with the upper end of the water leakage preventing device Restrictions may arise. Thus, there is a problem that the space between the lower part of the bottom of the water receptacle and the bottom part of the case of the purifier is lowered.

Secondly, when the volumetrically deformable part is replaced by the need to replace the volumetrically deformable part due to the occurrence of leakage, the housing must be rotated and separated from the fixing plate, resulting in poor usability.

Thirdly, when the housing is rotated and separated from the fixing plate, the water supply pipe connected to the inlet and the outlet may be bent or bent, resulting in damage to the flow pipe.

Fourthly, in order to absorb the volume deformation adduct and block the flow path formed inside the cover part, the volume deformation part pushes up the parts placed on the upper side of the volume deformation part through the volume expansion, . To this end, the pushing-up force of the volume-deformed portion is not limited to all the gravity acting on the parts that can be raised and lowered from above the volume-deformed portion, but also the water flowing along the flow path formed inside the cover portion can overcome the pressure It should be a size.

Therefore, when the amount of water leakage is small and the amount of deformation of the volume-deformed portion, that is, the amount of expansion is not large, leakage may not be properly blocked.

Fifth, the volume deforming portion is formed in a cylindrical shape, and the cylindrical deforming portion is mounted in a raised state. That is, the surface of the volume-deformed portion contacting the bottom of the case is a circular bottom portion. The horizontal cross-sectional area from the bottom portion to the top surface of the volume-deformed portion is constant.

Therefore, there is a disadvantage that instantaneous volume expansion does not occur because the volume deforming portion is in a divided state, that is, when the side portion of the cylindrical member is in contact with the bottom of the case.

According to an aspect of the present invention, there is provided a water leakage preventing device comprising: an inlet port formed on one side of an inner bottom surface of a product on which the water leakage preventing device is installed; And a connection channel connecting the inlet and the outlet; A valve cover covering the opened upper surface of the valve case; A volume deforming member which is disposed inside the valve case and whose volume is expanded when water that leaks to the bottom surface is absorbed; And a flow path shutoff valve which is placed in front of the volume deformable member and moves in the lateral direction by the expansion of the volume deformable member to close the outflow port.

An insertion slit for inserting and withdrawing the volume deformable member is formed inside the valve case.

The volume deformable member is a cylindrical pulp member having a predetermined diameter and a predetermined length, and the volume deformable member is mounted inside the valve case through the insertion slit in a horizontally divided state.

Wherein the flow path shutoff valve includes a valve body whose back surface is in close contact with a front surface of the volume deforming member, a shaft extending from a front center of the valve body, and a shutoff cap fitted to an end of the shaft, The shutoff cap closes the outlet by a horizontal movement of the shutoff cap.

The valve case includes a water absorbing hole and a bottom formed with a guide slit extending from the front end of the water absorbing hole toward the front end of the valve case; An outer wall extending along a top edge of the bottom portion to a predetermined height; An inner wall extending at a predetermined height along the outer wall at a position spaced apart from the outer wall in the center direction of the bottom portion; An inlet port protruding from a rear surface of the outer wall; An outflow port protruding from a front surface of the outer wall corresponding to the opposite side of the inflow port; And a guide sleeve protruding from the inner circumferential surface of the inner wall in a direction opposite to the extending direction of the outlet port.

Wherein the connecting passage is formed between the inner wall and the outer wall, the inlet and the outlet communicate with the connecting passage, the water flowing into the inlet port is supplied to the connecting passage through the inlet, The water flowing through the inlet port flows to the outlet port through the inlet port.

The shaft penetrates through the guide sleeve, and the shutoff cap is formed to selectively shield the outlet.

The water leakage preventing device according to the present invention may further include a shaft sealer fitted to the outer circumferential surface of the shaft.

The leakage preventing device according to the present invention further comprises an elastic member fitted to the outside of the guide sleeve, the front surface of the elastic member is in close contact with the inner wall, and the rear surface of the elastic member is in contact with the front surface of the valve body .

Wherein the valve cover includes a guide slit extending from the insertion slit toward the front end of the valve cover by a predetermined length and the flow shutoff valve includes an upper portion protruding from the upper surface of the valve body and inserted into the guide slit of the valve cover And a lower protrusion protruding from the bottom surface of the valve body and inserted into the guide slit of the valve case.

The leakage preventing device according to the present invention further includes an outer seating portion protruding from the outer circumferential surface of the inner wall and an inner seating portion protruding from the inner circumferential surface of the inner wall, And a left seat portion and a right seat portion extending from a right edge of the inner wall toward the center of the inner wall, wherein the left seat portion and the right seat portion are formed in a shape facing each other at a distance from each other, And a shutoff cap receiving groove for receiving the cap is formed.

The shutoff cap receiving groove is communicated with the connecting flow passage and the back surface of the shutoff cap is pressed toward the outlet by the pressure of the water flowing into the shutoff cap receiving groove. .

The outer seating part further includes a rear seating part protruding from the rear surface of the inner wall, and a depression is formed on an outer surface of the rear seating part facing the inlet.

Wherein the inner seating portion includes a first inner seating portion formed on a front end side of the valve case and a second inner seating portion formed on a rear end side of the valve case, And extends in the direction of the center of the valve case (11).

The leakage preventing device according to the present invention may further include a volume deformable member support rib formed in the second inner seating portion and supporting the bottom end of the rear end of the volume deformable member.

The leakage preventing device according to the present invention further comprises an outer sealer seated on the upper surface of the outer wall and an inner sealer seated on the upper surface of the inner wall, wherein the outer sealer and the inner sealer are fitted And the inner sealer groove and the inner sealer groove are depressed, respectively.

The leak-barrier device according to the embodiment of the present invention having the above-described structure has the following advantages.

First, the leakage preventing device according to the present invention has a structure in which the cylindrical volume deforming member is mounted in a divided state instead of the upright state, and the flow path blocking portion moves in the horizontal direction by the volume deforming member.

Therefore, the design height of the leakage preventing device is significantly reduced, and the utilization of the internal space of the product in which the leakage preventing device is installed is improved.

Second, since the deformation direction of the volume deformable member and the moving direction of the flow path blocking portion are in the horizontal direction orthogonal to gravity, they are not affected by gravity. Therefore, even when the amount of water leakage is small and the amount of volume deformation of the volume deformable member is small, the flow path inside the water leakage preventing device can be immediately shut off.

Third, since the volumetric deformation member is separated through the hole in which the volume deformation member is inserted, there is no need to disassemble the leakage preventing member to replace the volumetrically expanded deformed member. There is an advantage that the bending or bending phenomenon of the secondary pipe connected to the outlet is not generated.

Fourth, in the case of the present invention, when the flow path blocking portion moves in the direction of blocking the flow path, gravity does not affect the flow path. Therefore, there is an advantage that the magnet member provided in the conventional water leakage preventing device in which gravity acts as a force for interrupting the flow passage is not necessary in the present invention, and as a result, manufacturing cost of the water leakage preventing device is reduced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a planar perspective view of a leakage prevention device according to an embodiment of the present invention; FIG.
2 is a bottom perspective view of the water leakage preventing device.
3 is an exploded perspective view of the water leakage preventing device.
Fig. 4 is a longitudinal sectional view taken along line 4-4 in Fig. 1; Fig.
5 is a planar perspective view of a valve cover constituting a water leakage preventing device according to an embodiment of the present invention.
6 is a bottom perspective view of the valve cover.
7 is a perspective view of a valve case constituting a leak-barrier device according to an embodiment of the present invention;
8 is a plan view of the valve case.
Fig. 9 is a longitudinal sectional view taken along line 9-9 in Fig. 8; Fig.
10 is a front perspective view of a flow path shutoff valve constituting a leakage prevention device according to an embodiment of the present invention.
11 is a rear perspective view of the flow-path shutoff valve.
FIG. 12 is a longitudinal sectional view of the water leakage preventing device cut along the line 12-12 in FIG. 1, and is a sectional view showing the internal construction of the water leakage preventing device in a state in which no leakage occurs.
FIG. 13 is a longitudinal sectional view of the water leakage preventing device cut along the line 12-12 in FIG. 1, and is a sectional view showing the internal structure of the water leakage preventing device in a state in which leakage occurs and the flow path shutoff valve is operated.
14 is a cross-sectional view of the valve case showing the flow phenomenon occurring near the outlet of the valve case when no leakage occurs.
15 is a cross-sectional view of the valve case showing a flow phenomenon occurring near the outlet of the valve case when leakage occurs.
16 is a cross-sectional view of the valve case showing the flow phenomenon occurring near the inlet of the valve case.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the configuration and function of a leakage prevention device according to an embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is an exploded perspective view of the water leakage preventing device according to an embodiment of the present invention, FIG. 2 is a bottom perspective view of the water leakage preventing device, FIG. 3 is an exploded perspective view of the water leakage preventing device, 4 is a longitudinal sectional view taken along line IV-IV.

1 to 4, a water leakage preventing device 10 according to an embodiment of the present invention includes a valve case 11, a valve cover 12 covering an upper opening of the valve case 11, A flow volume shutoff valve 13 accommodated in the valve case 11, a volume deforming member 14 disposed on the rear side of the flow path shutoff valve 13, A shaft sealer 16 and a shutoff cap 17 which are fitted to the flow path shutoff valve 13 and a case sealer 18 which is placed in a portion where the valve case 911 and the valve cover 12 are in close contact with each other, ). The case sealer 18 may include an outer sealer 181 and an inner sealer 182.

The outer sealer 181 and the inner sealer 182 prevent the water flowing along the flow path (described later) formed in the valve case 11 from leaking to the outside of the leakage preventing device 10 .

Further, the water leakage preventing device 10 is arranged on the water supply channel so that water flowing along the water supply channel flows through the water leakage preventing device 10. The leakage preventing device 10 is mounted on the inner bottom of the product having the water supply channel as an essential component, and detects whether the product leaks. The product may include all household appliances that require water supply, such as washing machines, dishwashers, refrigerators, and water purifiers. The mounting position of the water leakage preventing device 10 may be considered to be the same as that disclosed in the above-mentioned prior art.

In addition, the volume deformable member 14 also includes a pulp material whose volume expands when moisture is absorbed, as in the prior art. However, the volume deformable member 14 is not a structure vertically erected as disclosed in the above-mentioned prior art, but has a horizontally laid structure. Therefore, the side surface portion of the volume deformable member 14 faces the inner bottom surface of the product in which the leakage preventing device 10 is installed. Then, when the volume deformable member 14 absorbs the leaked water, it expands in the horizontal direction to horizontally move the flow path shutoff valve 13. [

As the flow path shutoff valve 13 is horizontally moved, the shutoff cap 17 closes any point of the flow path formed in the valve case 11 to block the supply of water along the water flow path .

The elastic member 15 is disposed on the opposite side of the volume deforming member 14 so that when the flow path shutoff valve 13 is moved by the volume expansion of the volume expanding member 14, ) Is contracted. When the volume deformable member 14 is removed, the elastic member 15 is restored to its original state.

Hereinafter, the shapes and functions of the components constituting the leak-barrier device 10 will be described in detail with reference to the drawings.

FIG. 5 is a plan perspective view of a valve cover constituting a water leakage preventing device according to an embodiment of the present invention, and FIG. 6 is a bottom perspective view of the valve cover.

5 and 6, the valve cover 12 constituting the water leakage preventing device 10 according to the embodiment of the present invention may have a rectangular shape corresponding to the top surface shape of the valve case 11 . However, it should be noted that the plane shape of the valve cover 12 is determined according to the top surface shape of the valve case 11, and may be designed to have a shape other than a square shape.

The valve cover 12 includes a cover body 121, a fastening end 124 extending from a corner of the cover body 121, a slit portion formed inside the cover body 121, And a sealer groove formed on the bottom surface of the cover body 121.

More specifically, a fastening hole 124a is formed in the fastening end 124, and a fastening member such as a screw is inserted into the valve case 11 through the fastening hole 124a.

The slit portion has an insertion slit 122 into which the volume deformable member 14 is inserted and a guide slit 123 for guiding the movement of the upper projection 132 (see FIG. 10) . The guide slit 123 extends from the center of the front end of the insertion slit 122 toward the front end of the cover body 121 by a predetermined length.

The insertion slit 122 preferably has a width W1 that is at least equal to or greater than the length of the volume deformable member 14 in a state in which the volume deformable member 14 is not inflated. In this case, in order to absorb the leaked water to replace the volume deformed member 14 whose volume has expanded, the flow path shutoff valve 13 is retracted to press the entire surface of the volume deformable member 14. The volume deformable member 14 is taken out through the insertion slit 122 in a state in which the volume deformable member 14 is reduced to a length corresponding to the width W1 of the insertion slit 122. [

The width W1 of the insertion slit 122 is formed to be a size corresponding to the length of the volume expansion member 14 that is in the fully expanded state so that the volume modification member 14 can be easily separated have. In other words, the volume deformation member 14 can be immediately separated from the volume deformation member 14 without having to shrink the volume deformation member 14 by the flow path shutoff valve 13.

The width W2 of the guide slit 123 may be equal to the width of the upper protrusion 132 of the flow path shutoff valve 13. The length L2 of the guide slit 123, May be formed to be longer than at least the moving distance of the upper protrusion (132). 1, at least a part of the upper protrusion 132 may protrude to the inside of the insertion slit 122 in a state where the volume deformable member 14 is newly inserted. However, in this state, the remaining part of the upper protrusion 132 may be held in the guide slit 123.

7) of the valve case 11 is formed and the rear end portion of the water leakage preventing device 10 is connected to the valve case 11 (see FIG. 7) The inlet port 111a (see Fig. It is to be noted that the front end portion and the rear end portion of the components constituting the leakage preventing device 10 are also defined with reference to the outflow port 111b and the inflow port 111a of the valve case 11.

The sealer groove formed on the bottom surface of the cover body 121 includes an outer sealer groove 125 and an inner sealer groove 126. The sealer grooves 125 and 126 may be formed in a closed loop shape along the shape of the cover body 121. The edges of the sealer grooves 125 and 126 are smoothly rounded to a predetermined curvature, thereby minimizing bending of the sealers fitted into the sealer grooves 125 and 126.

In addition, the inner sealer groove 126 may be formed to surround the slit portion from the outside of the slit portion, and the outer sealer groove 125 may be formed at a position spaced apart from the inner sealer groove 126 by a predetermined distance . The inner sealer groove 126 and the outer sealer groove 125 are depressed upward to a predetermined depth so that a partition rib (or partition wall) 127 (or 127) is formed between the inner sealer groove 126 and the outer sealer groove 125 Is formed.

A stepped surface 129 for supporting the upper rear surface of the volume deformable member 14 may be formed on the rear surface of the insertion slit 122. The stepped surface 129 may be rounded at the same curvature as the circumferential surface of the volume deformable member 14 at a position spaced downward from the upper surface of the insertion slit 122.

The valve upper guide surface 128 may be rounded on the bottom surface of the cover body 121 corresponding to the inner region of the inner sealer groove 126. The valve upper guide surface 128 may be rounded toward the left and right edges of the cover body 121 about the guide slit 123. The valve upper guide surface 128 is formed to guide the movement of the flow path shutoff valve 13 in accordance with the expansion of the volume deformable member 14. Therefore, the valve upper guide surface 128 may be rounded to have a curvature corresponding to the curvature of the outer peripheral surface of the valve body 131 (see FIG. 10) of the flow path shutoff valve 13.

FIG. 7 is a perspective view of a valve case constituting a leakage preventing device according to an embodiment of the present invention, FIG. 8 is a plan view of the valve case, and FIG. 9 is a longitudinal sectional view taken along line 9-9 of FIG.

7 to 9, the valve case 11 constituting the water leakage preventing device 10 according to the embodiment of the present invention may have a substantially rectangular planar shape, but the present invention is not limited thereto.

In detail, the valve case 11 has an outer wall 111 extending a predetermined height upward from an outer edge of the bottom portion, and a bottom portion spaced inwardly from the outer wall 111, And an inner wall 113. The outer wall 111 and the inner wall 113 may extend at the same height. A guide passage 118 may be formed between the outer wall 111 and the inner wall 113.

An accommodating chamber 114a is formed inside the inner wall 113 and the flow path shutoff valve 13 and the volume deformable member 14 can be accommodated in the accommodating chamber 114a. An absorbing hole 116a may be formed in the bottom of the accommodating chamber 114a and a guide slit 116b may extend from the front end of the absorbing hole 116a to the front end of the accommodating chamber 114a. .

The lower portion of the valve case 11 defining the bottom of the accommodating chamber 114a is formed with a valve lower guide portion 116 which is rounded with a curvature equal to the curvature of the valve body 131 of the flow- . 2, the bottom portion of the valve case 11 may be flat, and only the valve lower guide portion 116 may be convexly protruded and rounded. The valve lower guide part 116 extends from the front end of the absorption hole 116a to the front end of the accommodating chamber 114 and the guide slit 116b is guided by the valve lower guide part 116 And may be formed long in the central portion. That is, the valve lower guide portion 116 is divided into a left portion and a right portion by the guide slit 116b.

The absorption hole 116a may be defined as a space for allowing the volume deformable member 14 to absorb the water leaking to the inner bottom surface of the electric appliance in which the water leakage preventing device 10 is installed. The guide slit 116b guides the movement of the lower projection 133 (see FIG. 10) protruding from the bottom surface of the valve body 131. As shown in FIG.

An inner seating portion 114 protrudes from the inner circumferential surface of the inner wall 113 and an outer seating portion 115 protrudes from the outer surface of the inner wall 113. The upper surface of the inner seating part 114 and the upper surface of the outer seating part 115 are placed on the same plane and lower than the upper surface of the inner wall 113.

The outer seating part 115 may protrude from the outer surface of the front end side of the inner wall 113 and the outer surface of the rear end side of the inner wall 113, respectively. The outer seating part 115 formed on the outer surface of the front end of the inner wall 113 is formed in a shape of an outer surface of the front end portion of the inner wall 113 at the left and right corners of the front end side of the inner wall 113, And may include a left seating portion 115c and a right seating portion 115b that are projected in the center direction and a rear seating portion 115d formed on an outer surface of the rear end side of the inner wall 113. [

The end portions of the left seating portion 115c and the right seating portion 115b may be formed to face each other with a predetermined distance therebetween. The space between the left seating part 115c and the right seating part 115b may be defined as a shutoff cap receiving recess 119. [

A shaft sealer receiving groove 117b may be formed in the inner wall 113 defining the rear surface of the blocking cap receiving groove 119. A guide sleeve 117 may protrude from a rear surface of the inner seat portion 114 corresponding to the rear side of the shaft sealer seat groove 117b.

Specifically, the accommodating chamber 114a may be defined as an inner space of the inner seating portion 114, and the guide sleeve 117 may be defined in the receiving chamber 114a at the front of the accommodating chamber 114a. 114a.

A volume deformable member supporting rib 114b may protrude from the left edge and the right edge of the inner seating portion 114 defining the rear surface of the accommodating chamber 114a, that is, the rear surface of the accommodating chamber 114a have. The volume deformable member supporting ribs 114b may be rounded to have the same curvature as the circumferential surface of the volume deformable member 14. [

In detail, the inner seating portion 114 may include a first inner seating portion formed at a front end side of the valve case 11 and a second inner seating portion formed at a rear end side of the valve case 11 have. The guide sleeve 117 extends toward the center of the valve case 11 at the first inner seating portion and the volume deformable member support rib 114b is formed at the second inner seating portion.

An outlet port 11b may protrude from the front center of the outer wall 111 and an inlet port 111a may protrude from the rear center. 9, an inflow passage 111c is formed in the inflow port 111a and an inflow passage 111f is formed in the outflow port 111b.

The inlet 111d defined at the front end of the inlet passage 111c and the outlet 111e corresponding to the inlet of the outlet passage 111f communicate with the guide passage 118. [

The outlet 111e is selectively shielded by the flow-line shutoff valve 13. [ That is, when the volumetric deformable member 14 is expanded due to leakage, the flow path shutoff valve 13 moves and blocks the outlet 111e.

A shaft hole 117a is formed in the center of the guide sleeve 117. The center of the inflow passage 111c, the center of the outflow passage 111f, and the center of the shaft hole 117a are aligned with each other As shown in FIG.

A depression 115a may be formed on the rear surface of the rear seat part 115d. The depressed portion 115a may be formed at a position facing the inlet 111d, that is, at the center of the rear seat portion 115d. Accordingly, the high pressure water discharged into the guide passage 118 through the inlet port 111d can be prevented from bumping into the rear seat portion 115d and bouncing in all directions.

Fig. 10 is a front perspective view of a flow-line shutoff valve constituting a leakage preventing device according to an embodiment of the present invention, and Fig. 11 is a rear perspective view of the flow-line shutoff valve.

10 and 11, the flow path shutoff valve 13 constituting the water leakage preventing device 10 according to the embodiment of the present invention includes a cylindrical valve body 131 having a closed front and an open rear face, A shaft 135 protruding from the front surface of the valve body 131 and extending a predetermined length from the front center of the valve body 131; A neck 137 extending from an end of the neck 136 and having a diameter greater than the diameter of the neck 136; An upper protrusion 132 protruding from the upper surface of the body 131 and a lower protrusion 133 protruding from the lower surface of the valve body 131 opposite to the upper protrusion 132, And a reinforcing rib 138 protruding from the rear surface of the reinforcing rib 138.

The support sleeve 134 is formed to have an outer diameter smaller than the outer diameter of the valve body 131 and an inner space of the support sleeve 134 is connected to an elastic member receiving groove 134a in which the elastic member 15 is received. . ≪ / RTI > The front end portion of the elastic member 15 is accommodated in the elastic member receiving groove 134a in a state where the front end portion of the elastic member 15 is fitted to the outer peripheral surface of the guide sleeve 117 of the valve case 111. [ The rear end of the elastic member 14 is in close contact with the front surface of the valve body 131 defining the elastic member receiving groove 134a and contracts or expands as the valve body 131 moves.

The head 137 is designed to have the same outer diameter as the outer diameter of the shaft 135, and a locking groove may be formed between the head 137 and the shaft 135. 12, the rear end portion of the shutoff cap 17 is fitted into a catching groove formed in the neck 136, and the rear end of the shutoff cap 17 is engaged with the stopper cap 17, So that the blocking cap 17 is not separated from the head 137. The shutoff cap 17 closes or opens the outlet 111e according to the movement of the valve body 131. [

The upper protrusion 132 may protrude upward from the outer circumferential surface of the valve body 131 with a predetermined width and height. The upper protrusion 132 is fitted in the insertion slit 122 formed in the valve cover 12. The upper protrusion 132 moves in the forward and backward directions while being fitted to the insertion slit 122 and projects further upward than the upper surface of the valve cover 12 so that the user can grip the upper protrusion 132 with the thumb and the index finger. .

The lower protrusion 133 may protrude from the bottom surface of the valve body 131 with a width and height smaller than the width and height of the upper protrusion 132. The lower protrusion 133 is fitted in the guide slit 116b formed on the bottom of the valve case 11 and moves in the forward and backward directions.

 The reinforcing rib 138 may protrude from the rear surface of the valve body 131, that is, the surface opposite to the surface on which the support sleeve 134 is formed, and may have various shapes, such as a cross shape, .

The protrusion height k2 of the reinforcing rib 138 is formed to be smaller than the extension length k1 of the valve body 131 so that a part of the front face of the volume deforming member 14 is located inside the valve body 131 As shown in Fig. Then, the reinforcing rib 138 is in close contact with the front surface of the volume deformable member 14.

However, the present invention is not limited to this, and the rear surface of the valve body 131 may also be formed as a closed surface such that the rear surface of the valve body 131 is in surface contact with the front surface of the volume deformable member 14 It is possible.

FIG. 12 is a vertical sectional view of the water leakage preventing device cut along the line 12-12 in FIG. 1, and is a sectional view showing the internal construction of the water leakage preventing device in a state where no leakage occurs.

12, the oil line shutoff valve 13 is accommodated in the accommodating chamber 114a, and the shaft 135 passes through the shaft hole 117a, and the shaft sealer receiving groove 117b .

In detail, the shaft sealer 16 is fitted to the outer circumferential surface of the shaft 135, and the shaft sealer 16 can be seated on the rear surface of the shaft sealer seat groove 117b. The shaft sealer 16 is seated in the shaft sealer receiving groove 117b while being fitted to the shaft 135 so that water filled in the guide passage 117 flows through the shaft hole 117a into the receiving chamber 114a from being introduced.

An outer sealer 181 and an inner sealer 182 are seated on the upper surface of the outer wall 111 of the valve case 11 and the upper surface of the inner wall 113, respectively. When the valve cover 12 is engaged, the outer sealer 181 and the inner sealer 182 are inserted into the outer sealer groove 125 and the inner sealer groove 126, respectively. The outer sealer 181 and the inner sealer 182 block water flowing along the guide passage 118 from leaking outside the valve case 11 or into the accommodating chamber 114a.

In order to insert the volume deformable member 14 into the accommodating chamber 114a, the upper protrusion 132 of the flow path shutoff valve 13 is first gripped forward and the insertion slit 122 is completely opened . In this state, the elastic member 15 is in a contracted state.

When the volume deformable member 14 is inserted into the insertion slit while the opening of the insertion slit 122 is ensured, the bottom end of the rear end of the volume deformable member 14 is fitted to the rear edge of the accommodating chamber 114a And is seated in the formed body-deformable member supporting rib 114b.

In this state, when the upper protrusion 132 is released, the flow path shutoff valve 13 is retracted while the elastic member 5 is restored to the original state. The volume deformation member 14 is also retracted by the flow path shutoff valve 13 so that the rear upper end of the volume deformable member 14 is in contact with the valve upper guide surface 128 formed in the valve case 12, Respectively.

The shutoff cap 17 maintains the state of being separated from the outlet 111e so that the water introduced through the inlet port 111a flows into the outlet port 111a, 111b. For reference, a water pipe may be connected to the inlet port 111a and the outlet port 111b, respectively.

The lower end of the volume deformable member 14 is held at a predetermined height (h) away from the bottom surface of the product in which the water leakage preventing device 10 is installed. Strictly speaking, until the water level of the water leaking to the bottom surface of the product reaches the bottom of the volume deformable member 14, the flow path shutoff valve 13 does not operate even if leakage occurs.

FIG. 13 is a longitudinal sectional view of the water leakage preventing device taken along the line 12-12 in FIG. 1, and is a sectional view showing the internal structure of the water leakage preventing device in a state in which leakage occurs and the flow path shutoff valve is operated.

13, when water leaks and the height of the touched water reaches the height h at which the touched water contacts the volume deforming member 14 on the inner bottom surface of the product in which the water leakage preventing device 10 is installed, 14) begins to expand.

Further, since the volume deformable member 14 is mounted horizontally, it is expanded in a direction pushing the flow path shutoff valve 13 forward when water absorption starts. Then, the elastic member 15 is contracted, and the leak-barrier valve 13 advances by a predetermined distance d. The shutoff cap 17 closes the outlet 111e so that water flowing along the guide passage 118 can not be discharged to the outlet port 111b.

Since the volume deformable member 14 is horizontally laid, the cross sectional area of the volume deformable member 14 gradually increases until reaching the center height of the volume deformable member 14. The cross sectional area decreases from the center of the volume deformable member 14 to the upper end of the volume deformable member 14.

On the other hand, when the volume deformable member 14 is vertically erected, the cross sectional area from the lower end to the upper end of the volume deformable member is the same. Therefore, the water absorption capacity is better in a state in which the volume deformable member 14 is laid out than the standing state.

In addition, since the volume deformable member 14 is mounted in a divided state, the height of the leakage preventing device 10 of the present invention is higher than that of the conventional leakage preventing device in which the volume deformable member 14 is mounted in a raised state . Accordingly, there is an advantage that utilization of the inner lower space of the product in which the leakage preventing device 10 is installed is improved.

On the other hand, when the volume deformable member 14 expands once due to a leakage phenomenon, the volume deformable member 14 must be replaced.

In detail, the manner of replacing the volume deformable member 14 can be changed according to the size of the front-rear width W1 of the insertion slit 122. [

First, when the width W1 of the insertion slit 122 is shorter than the length of the volume deformable member 14 in the expanded state, the upper protrusion 132 of the flow- The valve 13 is retracted to cause the volume deformable member 14 to contract. Then, in a state in which the volume deformable member 14 is contracted by the width of the insertion slit 122, the flow path shutoff valve 13 is advanced and then the volume deformable member 14 is taken out by hand.

Secondly, when the width W1 of the insertion slit 122 is equal to or longer than the length of the volume deformable member 14 in the expanded state, The member 14 can be separated.

Since the valve cover 12 does not need to be separated from the valve case 11 in order to replace the volume deformable member 14 as described above, the replacement of the volume deformable member 14 There is an advantage that it can be made much easier.

Fig. 14 is a cross-sectional view of the valve case showing a flow phenomenon occurring near the outlet of the valve case when leakage of water does not occur. Fig. 15 is a cross-sectional view of the valve case showing the flow phenomenon occurring near the outlet of the valve case when leakage occurs Sectional view.

First, referring to FIG. 14, when no leakage occurs, the shutoff cap 17 does not close the outlet 111e. Water flowing from the left and right sides of the valve case 11 toward the outlet 111e along the guide passage 118 is discharged to the outside of the leakage preventing device 10 through the outlet port 111b. At this time, the shutoff cap 17 is housed in the shutoff cap receiving groove 119.

15, when the volume deforming member 14 is expanded in the lateral direction due to the occurrence of leakage, the flow path shutoff valve 13 moves and the shutoff cap 17 shields the outflow port 111e .

At this time, the shutoff cap 17 is out of the shutoff cap receiving recess 119, and the connection flow path 118 is in a state of communicating with the shutoff cap receiving recess 119. That is, water flowing along the connection passage 18 flows toward the shutoff cap receiving groove 119 and presses the rear surface of the shutoff cap 17 as shown by an arrow. The blocking cap 17 is strongly adhered to the outlet 111e by the pressure of the water flowing into the blocking cap receiving groove 119 in addition to the pressing force by the volume expansion of the volume deforming member 14 . Therefore, there is an effect of surely shutting off the flow path formed in the leak-barrier device 10 when leakage occurs.

16 is a cross-sectional view of the valve case showing the flow phenomenon occurring near the inlet of the valve case.

Referring to FIG. 16, water flowing into the connection passage 118 through the inlet 111d is divided into left and right sides of the valve case 11 after colliding with the depression 115a.

More specifically, when the depressed portion 115a is not formed on the wall surface of the rear seat portion 115d, water striking the rear seat portion 115d is scattered not only on the right and left sides of the valve case 11 but also on the upper side And a phenomenon that the flow resistance becomes large may occur. However, the water discharged into the connection passage 118 through the inlet 111d hits the depression 115a, thereby reducing the flow velocity and reducing the flow resistance. That is, it can be explained that the depression 115a functions as a breakwater for absorbing impact.

Claims (16)

In the leak-barrier device,
A valve case disposed on an inner bottom surface of the product on which the water leakage preventing device is installed, the valve case including an inlet formed on one side, an outlet formed on the other side, and a connecting channel connecting the inlet and the outlet;
A valve cover covering the opened upper surface of the valve case;
A volume deforming member which is disposed inside the valve case and whose volume is expanded when water that leaks to the bottom surface is absorbed; And
And a flow path shutoff valve which is placed in front of the volume deformable member and moves in the lateral direction by the expansion of the volume deformable member to close the outlet. The method according to claim 1,
And an insertion slit for inserting and withdrawing the volume deformable member is formed inside the valve case. 3. The method of claim 2,
Wherein the volume deformable member is a cylindrical pulp member having a predetermined diameter and length,
Wherein the volume deformable member is mounted inside the valve case through the insertion slit in a horizontally laid-out state. 3. The method of claim 2,
Wherein the flow-
A valve body whose rear surface is in close contact with the front surface of the volume deformable member,
A shaft extending from the front center of the valve body,
And a shutoff cap fitted to an end of the shaft,
And the shutoff cap closes the outlet by the movement of the flow path shutoff valve in the horizontal direction. 5. The method of claim 4,
The valve case includes:
A bottom portion having a water absorbing hole and a guide slit extending from a front end of the water absorbing hole toward a front end portion of the valve case,
An outer wall extending along a top edge of the bottom portion to a predetermined height,
An inner wall extending at a predetermined height along the outer wall at a position spaced apart from the outer wall in the center direction of the bottom portion;
An inlet port protruding from the rear surface of the outer wall,
An outflow port protruding from a front surface of the outer wall corresponding to the opposite side of the inflow port,
And a guide sleeve protruding from an inner peripheral surface of the inner wall in a direction opposite to an extending direction of the outlet port. 6. The method of claim 5,
A connecting passage is formed between the inner wall and the outer wall,
Wherein the inlet port and the outlet port are in communication with the connection passage,
The water flowing into the inflow port is supplied to the connection passage through the inflow port,
And the water flowing along the connection channel flows to the outlet port through the inlet port. 6. The method of claim 5,
Wherein the shaft passes through the guide sleeve and the shutoff cap is formed to selectively shield the outlet. 8. The method of claim 7,
And a shaft sealer fitted to an outer peripheral surface of the shaft. 6. The method of claim 5,
And an elastic member fitted to the outside of the guide sleeve,
Wherein a front surface of the elastic member is in close contact with the inner wall,
And the rear surface of the elastic member is in close contact with the front surface of the valve body. 6. The method of claim 5,
The valve cover
And a guide slit extending from the insertion slit toward the front end of the valve cover by a predetermined length,
Wherein the flow-
An upper protrusion protruding from the upper surface of the valve body and inserted into the guide slit of the valve cover,
And a lower protrusion protruding from a bottom surface of the valve body and inserted into a guide slit of the valve case. 6. The method of claim 5,
An outer seating portion protruding from an outer peripheral surface of the inner wall,
Further comprising an inner seating portion protruding from an inner peripheral surface of the inner wall,
Wherein the outer seating portion comprises:
And a left seat portion and a right seat portion extending from the left and right edges of the front wall of the inner wall in the center direction of the inner wall,
Wherein the left seating portion and the right seating portion are formed to face each other at a position where they are spaced apart from each other,
And a blocking cap receiving groove is formed at a position where the blocking cap is received. 12. The method of claim 11,
The shutoff cap receiving groove communicates with the connecting flow passage in a state in which the shutoff cap closes the outlet,
Wherein the back surface of the shutoff cap is pressed toward the outlet by the pressure of water flowing into the shutoff cap receiving groove. 12. The method of claim 11,
Wherein the outer seating portion comprises:
Further comprising a rear seat portion protruding from a rear surface of the inner wall,
And a depression is formed on an outer surface of the rear seat portion facing the inlet. 12. The method of claim 11,
Wherein the inner seating portion comprises:
A first inner seating portion formed at a front end side of the valve case,
And a second inner seating portion formed on a rear end side of the valve case,
Wherein the guide sleeve extends in a direction toward the center of the valve case (11) in the first inner seating portion. 15. The method of claim 14,
And a volume deformable member support rib formed in the second inside seating portion and supporting the bottom end of the rear end of the volume deformable member. 6. The method of claim 5,
An outer sealer seated on an upper surface of the outer wall,
Further comprising an inner sealer seated on an upper surface of the inner wall,
Wherein an outer sealer groove and an inner sealer groove, in which the outer sealer and the inner sealer are fitted, are formed in a bottom surface of the valve cover, respectively.

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