KR200472604Y1 - Apparatus for preventing backward flow to repair a drain - Google Patents

Abstract

An embodiment of the present invention relates to a backflow prevention device for sewer maintenance, which can maintain a fixed and hermetic state even when pressure is applied from below, and can mount a support on sewers of various sizes.

Description

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

The present invention relates to a backflow prevention device for sewer maintenance.

BACKGROUND ART Generally, a backflow prevention device disposed in a sewer has an opening / closing plate for opening / closing an opened surface of a sewer, and a structure for opening the sewer when water is drained and shielding the sewer again after drainage is completed.

A representative example of such a backflow prevention device is disclosed in Korean Patent Registration No. 10-1037773. The backflow prevention device is constructed such that a spherical opening / closing part connected to a cylindrical support by a center shaft is supported by a spring. When the water is drained through the cylindrical support, the opening / closing part of the spherical shape moves downward by the load of water, The water is drained through the interior of the support. After the water is drained, a load is not applied to the spherical opening / closing part, and the opening / closing part is returned by the elasticity of the spring to close the cylindrical supporting body while contacting with the base milling. Therefore, when the opening / closing portion is closed on the bottom surface of the cylindrical support body, the backflow of odor and sewage is blocked.

However, the backflow prevention device having such a structure has the following problems.

First, since there is no separate structure that can be coupled to the sewer, there is a problem that the sewer can be easily detached from the sewer because the sewer is vulnerable to the pressure applied downward when the sewage flows backward.

Particularly, in the case of the bathroom and toilet floor, the reverse flow is frequently generated, so that the high pressure can be applied upward. However, the fixing can be easily done by the simple seating structure.

Secondly, the backflow prevention device of the above structure has a hermetic structure between the opening and closing part and the cylindrical support, but there is no separate airtight structure between the backflow prevention device and the sewer, so that the backflow prevention device and the sewage There is a problem that the backflow can occur.

Third, the backflow prevention device having the above-described structure can be installed only in a sewer of a predetermined size. In other words, it is necessary to use a product in which the backflow prevention device and the sewer are integrally formed, so that it is possible to install only the backflow prevention device in the sewer already installed, and to remove the whole sewer and install the sewer equipped with the backflow prevention device Therefore, there is a problem in cost and ease of installation.

The object of the present invention is to provide a sewer backflow prevention device for sewer maintenance, which is capable of maintaining a fixed and airtight state even when pressure is applied from below, and is capable of mounting a support to sewers of various sizes.

The backflow prevention device for a sewer repair according to the embodiment of the present invention includes a backflow prevention device inserted into an inner side of a drain hole having various internal diameters already installed and selectively opening and closing the passage by a load of drained drainage; A plurality of fixing protrusions protruding from an outer surface of the backflow prevention device; A support body formed in a disk shape larger than an inner diameter of the sewer and mounted on the outer side of the sewer to support the backflow prevention device to be fixed on the sewer; A mounting hole formed at the center of the support and through which the backflow prevention device is inserted; An extension surface extending downward from the mounting port and contacting the circumferential surface of the backflow prevention device; A plurality of backflow prevention devices formed to be fixedly mounted on the extension surface corresponding to the fixing protrusions, the fixing protrusions being inserted in the vertical direction and then being rotated in the horizontal direction, Wherein a plurality of ribs are formed to have various diameters with respect to a center of the support body, wherein the plurality of ribs are formed so as to have a different inner diameter with respect to the center of the support body, And one of them is formed at an outer end of the support body and the other is disposed at an inner side thereof.

A housing flange protruding outward is formed at an upper end of the backflow prevention device and a housing seating part formed to be stepped so that the housing flange can be seated is formed around the mounting hole.

An O-ring made of a rubber material is formed between the flange and the fixing protrusion, and when the backflow prevention device is mounted, the backflow prevention device is closely contacted to the housing seating part to seal the space between the backflow prevention device and the support.

The backflow preventing device fixing portion includes an opening portion which is opened upward and extends in the vertical direction and into which the fixing protrusion is inserted downward; And a rotation part extending laterally from a lower side of the opening and having the fixing protrusion moved and received when the backflow prevention device is mounted in a state of being mounted in a lateral direction.

And the upper surface of the rotation part is formed to be inclined so that the height thereof decreases toward the side.

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The following effects can be expected in the backflow prevention device for sewer maintenance according to the embodiment of the present invention.

First, the backflow prevention device for sewer repair according to the embodiment of the present invention is constituted by the backflow prevention device and the support body, the backflow prevention device is inserted into the sewer, and the support body can be seated on the bottom member, It becomes possible to install it in various sewers.

Therefore, since the floor member can be directly mounted on the existing drainage apparatus without replacing the floor member, convenience of installation can be greatly improved.

In addition, if the support body is of a size that allows the support body to be mounted, it can be installed in any size sewer so that it can be standardized irrespective of the size of the backflow prevention device.

Second, the support of the backflow prevention device for sewer repair according to the present embodiment of the present invention is provided with a rib that forms a space in which an adhesive can be filled, so that the support and the bottom member can be more stably bonded, It is possible to maintain the fixed state and to improve durability and fixability.

Third, in the backflow prevention device for sewer repair according to the embodiment of the present invention, a fixing protrusion is formed on the outside of the backflow prevention device, and a fixing portion is formed on the inner surface of the backing. Therefore, the backflow prevention device can be inserted downward and then coupled with the support by lateral rotation. Therefore, even if the upward and downward pressure is applied, the backflow prevention device is not separated by the engagement of the fixing protrusion and the fixing portion.

Particularly, it has a structure in which it is rotated not only by a common thread but also by a certain angle in the transverse direction after insertion, so that the assembling and disassembling operation is more simple, and there is no problem such as abrasion of thread caused by foreign matter.

Fourthly, in the backflow prevention device for sewer repair according to the embodiment of the present invention, an o-ring is provided between the housing flange and the fixing protrusion, and the inclined surface contacting with the transverse rotating contact of the fixing protrusion is formed, The housing seating portion and the O-ring are further brought into close contact with each other by pressurization, so that not only the airtightness between the backflow prevention device and the support can be maintained, but also the backflow prevention device and the support can be more stably combined.

1 is a view showing a state in which a sewer backflow preventing device for repairing a sewer according to the present embodiment is installed in a sewer.
2 is an exploded perspective view of the backflow prevention device for repairing the sewer.
3 is a sectional view of the backflow preventing device for repairing the sewer.
4 is a perspective view of the backflow prevention device according to the present embodiment.
5 is a perspective view of the support according to the present embodiment as viewed from above.
Fig. 6 is a perspective view of the backflow prevention device for repairing the sewer, as viewed from below.
FIG. 7 is a view sequentially showing a mounting process of the backflow prevention device.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings.

1 is a view showing a state in which a sewer backflow preventing device for repairing a sewer according to the present embodiment is installed in a sewer. 2 is an exploded perspective view of the backflow preventing device for repairing the sewer.

1 and 2, a drainage unit is generally provided at the bottom of a bathroom and toilet in a home, and the drainage unit is made of plastic or metal. The drainage device may include a bottom member 10 fixed to the bottom surface of a bathroom and a toilet, and a filtering net (not shown) placed on the top surface of the bottom member 10.

At the center of the bottom member 10, there is formed a drainage hole 1 which is a hole through which sewage is discharged, and at least one stepped portion 2 may be formed in the bottom member 10 for a sufficient drainage of sewage water .

On the other hand, the bottom member 10 is equipped with a backflow prevention device 100 for sewer repair according to an embodiment of the present invention. The sewer restoration backflow prevention device 100 may include a backflow prevention device 200 formed of a metal material and a support 300 formed of a plastic material.

The backflow prevention device 200 and the support 300 may be detachably coupled to each other, and the support 300 may be formed in a plate shape. Therefore, the backflow prevention device 200 can be installed to be inserted into the sewer 1 in a state where the backflow prevention device 200 and the support 300 are engaged. At this time, the backflow prevention device 200 may be positioned inside the sewer 1, and the support 300 may extend over the stepped portion 2 outside the sewer 1. The supporting member 300 and the step portion 2 may be configured to be adhered to each other with an adhesive.

The outer diameter of the backflow prevention device 200 is formed to be smaller than the minimum diameter of the conventional sewage 1 and the diameter of the support 300 may be larger than the diameter of the sewage 1 .

Hereinafter, the configuration of the backflow prevention device and the support will be described in detail with reference to the drawings.

3 is a sectional view of the backflow preventing device for repairing the sewer. 4 is a perspective view of the backflow prevention device according to the present embodiment. 5 is a perspective view of the support according to the present embodiment as viewed from above. 6 is a perspective view of the backflow prevention device for repairing the sewer, as viewed from below.

3 to 6, the backflow prevention device 200 has a selectively openable structure and includes a cylindrical housing 210, a shielding member 220 for opening and closing the opened bottom surface of the housing 210, And a connecting rod 230 connecting the shielding member 220 and the housing 210.

In detail, the housing 210 is formed in a cylindrical shape that opens upward and downward, and is formed to be inserted into a mounting hole 310 at the center of the support body 300. An upper cover 240 is provided at an upper end of the housing 210. A plurality of holes through which water can pass may be formed in the upper cover 240, and a connection rod 230, which is elongated in the vertical direction, may be fixed at the center of the upper cover 240. A sealing member 250 is provided to contact the shielding member 220 when the lower surface of the housing 210 is closed along the lower end of the housing 210.

A housing flange 241 is formed at an upper end of the housing 210 so as to be seated in a housing seating part 311 formed in a stepped shape on the supporting body 300. The housing flange 241 may be formed by the cover 240 such that the diameter of the cover 240 is larger than the diameter of the housing 210.

A fixing protrusion 211 is formed on an outer surface of the housing 210 to be inserted into a mounting hole 310 of the supporting body 300. The fixing protrusions 211 may be elongated in the horizontal direction, and a plurality of fixing protrusions 211 may be formed on the outer surface of the housing 210 at positions facing each other.

An O-ring 212 is provided between the housing flange 241 and the fixing protrusion. The O-ring 212 prevents water leakage between the backflow prevention device 200 and the support 300 when the backflow prevention device 200 is installed and prevents the fixing protrusions 211 from being fixed to the support 300 So that the backflow prevention device 200 can be maintained in a more stable fixed state.

A sealing member 250 may be provided at the lower end of the housing 210. The sealing member 250 is formed of a rubber material, fixedly mounted on the lower end of the housing 210, and extended downward. The sealing member 250 is formed along the periphery of the housing 210 and contacts the shielding member 220 when the shielding member 220 is closed so that the shielding member 250 is disposed between the housing 210 and the shielding member 220 It becomes confidential.

Meanwhile, the shielding member 220 is formed in an empty shape, and the connection rod 230 is inserted through the shielding member 220 from above the shielding member 220. Accordingly, the shielding member 220 is formed to be slidable along the connection rod 230.

A foreign matter blocking member 231 for preventing external foreign matter from entering the inside of the shielding member 220 or attaching to the outer surface of the connecting rod 230 is formed on the connecting rod 230 outside the shielding member 220 .

The connecting rod 230 on the inner side of the shielding member 220 may be provided with an elastic member 260. Therefore, when the shielding member 220 moves downward due to the pressure generated when draining the sewage, the elastic member 260 is compressed, and when the external force is removed, The shielding member 220 moves upward to shield the opened lower surface of the housing 210.

The vertical movement and the driving structure of the shielding member 220 as described above are general and well known techniques. However, since the present embodiment is characterized by the structure of the housing 210 and the coupling relation between the housing 210 and the supporting body 300, a detailed description of the opening and closing structure of the shielding member 220 will be omitted, Various other structures are possible in the opening / closing structure of the member 220. [

Meanwhile, the support 300 may be formed in a disc shape having a predetermined diameter. The support 300 may be formed of a plastic material, and the mount 310 may be formed at the center of the support 300 to mount the backflow prevention device 200.

A housing seating part 311 is formed on the inside of the mounting hole 310 so as to be stepped. Accordingly, the housing flange 241 is seated on the housing seating portion 311 when the backflow prevention device 200 is mounted, and the O-ring 212 can be closely contacted.

An extending portion 312 extending downward is formed on the inside of the mounting hole 310. The extension portion 312 is formed in a cylindrical shape and extends downward by a predetermined length so as to be in surface contact with the circumferential surface of the housing 210. Further, the extension portion 312 may further include a backflow prevention device fixing portion 320.

The backflow preventing device fixing part 320 allows the backflow preventing device 200 to be fixedly mounted on the support 300. After the backflow preventing device 200 is inserted, The backflow prevention device 200 can be maintained in a fixed state without being separated from the support 300 even if the upper and lower pressures are applied.

The backflow prevention device fixing part 320 may be provided at a position facing each other and may be formed at a position corresponding to the fixing protrusion 211 formed in the backflow preventing device 200 .

The backflow preventing device fixing part 320 is formed along the inner side surface of the extension part 312 and is formed to be recessed so that the fixing protrusion 211 can be inserted. The circumferential surface of the housing 210 may be in contact with the extending portion 312 in a state where the fixing protrusion 211 is inserted.

The backflow preventing device fixing part 320 includes an opening part 321 that opens upward toward the mounting hole 310 and a rotation part 322 that extends laterally of the opening part 321. The opening 321 is formed to open vertically so that the fixing protrusion 211 can be moved downward. The rotation part 322 may be formed to extend laterally from the opening part 321 and to have a sloped surface 323 having a narrower vertical width toward the side.

Therefore, when the fixing protrusion 211 is inserted through the opening 321 and then rotated in the horizontal direction, the fixing protrusion 211 is restrained while being in contact with the inclined surface 323 inside the rotation part 322, The backflow preventing device 200 can be coupled to the support 300 and can be fixed without being vertically moved.

Meanwhile, a plurality of ribs 330 may be formed on the lower surface of the support 300. The ribs 330 are formed to have a predetermined height, and may be formed in a circular shape along the support 300. Therefore, a space is formed between the bottom member 10 and the support 300 in a state where the support member 300 is seated on the bottom member 10, such as silicone.

A plurality of the ribs 330 may be formed, and at least one rib 330 may extend downward from the outer end of the support 300 to prevent the adhesive from leaking to the outside. At least one circular rib 330 having a diameter smaller than that of the rib 330 formed at the outer end of the support 300 may be formed so that the adhesive is applied to the space between the ribs 330 So that it can be disposed without being leaked.

Hereinafter, the installation process of the backflow prevention device for sewer maintenance according to the embodiment of the present invention will be described.

FIG. 7 is a view sequentially showing a mounting process of the backflow prevention device.

Referring to FIG. 7, the backflow prevention device 200 is inserted into the mounting hole 310 from above the mounting hole 310. At this time, the fixing protrusion 211 is moved downwardly in a state in which the fixing protrusion 211 is positioned above the opening portion 321 of the backflow preventing device fixing portion 320.

The housing flange 241 of the backflow prevention device 200 is seated on the housing seating portion 311 and the outer surface of the housing 210 And is in tight contact with the inner surface of the extended portion 312. The fixing protrusions 211 are positioned inside the openings 321.

When the backflow prevention device 200 is mounted on the housing seat 311 and the backflow prevention device 200 is rotated in the horizontal direction, the fixing protrusion 211 located in the opening 321 moves And is located inside the rotation part 322. [

In this state, the backflow prevention device 200 is prevented from moving to the upper side of the support 300 when the pressure is generated due to the reverse flow of the sewage, It is possible to maintain the fixed mounting state without being separated from the terminal.

Meanwhile, the fixing protrusion 211 moves along the inclined surface 323 from the inside of the rotation part 322, so that the fixing protrusion 211 can be pressed downward. At this time, the O-ring 212 positioned between the housing seating part 311 and the housing flange 241 is pressed by the housing seating part 311 so as to be positioned between the backflow prevention device 200 and the support body 300 And the backflow prevention device 200 can be more stably fixed to the support 300. [0064]

After assembling the backflow prevention device 100 for repairing the sewer, the bottom member 10 is exposed and unnecessary structures or foreign substances provided in the sewer 1 are removed, and the sewer maintenance backflow prevention device 100 can be mounted.

In order to mount the backflow preventing device 100 for sewer maintenance, first, the adhesive is applied to the back surface of the assembled support member 300 or the stepped portion 2 of the bottom member 10. The adhesive can be filled between the plurality of ribs 330 formed on the support 300.

Next, when the backflow prevention device 200 is inserted into the sewer 1, the support 300 is placed on the stepped portion 2 of the bottom member 10, So that it can be stably fixed.

If necessary, the user may adjust the size of the support by cutting a part of the support 300 along the ribs 330 located on the inner side of the plurality of ribs 330.

1. Sewer 2. Step
10. Bottom member 100. Backflow prevention device for sewer maintenance
200. Backflow prevention device 210. Housing
211. Fixing projection 212. O-ring
230. Connecting rod 231. Foreign matter blocking member
240. Top cover 241. Housing flange
250. Sealing member 260. Elastic member
300. Support 310. Mounting hole
311. Housing seating 312. Extension
320. Backflow preventing device fixing portion 321. Opening
322. Turning part 323. Slope

Claims (7)

A backflow prevention device inserted inside a sewer having various internal diameters and installed and opened and closed by a load of sewage drained;
A plurality of fixing protrusions protruding from an outer surface of the backflow prevention device;
A support body formed in a disk shape larger than an inner diameter of the sewer and mounted on the outer side of the sewer to support the backflow prevention device to be fixed on the sewer;
A mounting hole formed at the center of the support and through which the backflow prevention device is inserted;
An extension surface extending downward from the mounting port and contacting the circumferential surface of the backflow prevention device; And,
A plurality of backflow preventing device fixing portions formed to be fitted on the extending surface corresponding to the fixing protrusions and being rotatable in the horizontal direction after the fixing protrusions are inserted in the vertical direction, ≪ / RTI &
A plurality of ribs are formed on the lower surface of the supporter so as to have a variety of inner diameters with respect to the center of the supporter, and ribs protruding downward along the periphery of the supporter to form a space below the supporter, And the other end is disposed on the inner side of the support.
The method according to claim 1,
A housing flange protruding outward is formed at an upper end of the backflow prevention device,
And a housing seating part formed to be stepped so that the housing flange can be seated is formed around the mounting hole.
3. The method of claim 2,
An O-ring of rubber material is formed between the flange and the fixing protrusion,
Wherein the backflow prevention device is in close contact with the housing seating part when the backflow prevention device is installed, thereby sealing the space between the backflow prevention device and the support.
The method according to claim 1,
The backflow prevention device fixing portion includes:
An opening which is opened upward and which extends in the vertical direction and into which the fixing protrusion is inserted downward;
And a rotation part extending laterally from a lower side of the opening and having the fixing protrusion moved and received when the backflow prevention device is mounted in a horizontal direction.
5. The method of claim 4,
Wherein the upper surface of the rotary part is inclined so as to be lowered in height toward the side.
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