CN212616435U - Flexible cut-off equipment and drainage equipment - Google Patents
Flexible cut-off equipment and drainage equipment Download PDFInfo
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- CN212616435U CN212616435U CN202021812983.6U CN202021812983U CN212616435U CN 212616435 U CN212616435 U CN 212616435U CN 202021812983 U CN202021812983 U CN 202021812983U CN 212616435 U CN212616435 U CN 212616435U
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Abstract
The application provides a flexible cut-off equipment and drainage equipment, includes: a flexible sleeve having a chamber; the valve body is provided with a flow passage and a chute; the flexible sleeve is arranged in the chute and is connected with the valve body in a sealing way; the spout is linked together with the circulation passageway to make the flexible cover slide to the circulation passageway by the spout when the inflation, perhaps the flexible cover slides to the spout by the circulation passageway when contracting, and such structural design just makes it need not establish the flexible cover in the outside of steel dustcoat, also need not flexible cover envelope whole circulation passageway, and only need the flexible cover slide through inflation or contraction in the spout of valve body can, very big reduction the laminating area of flexible cover and circulation passageway, also need not install its whole transversely in the well when being applied to drainage system (like the reposition of redundant personnel well, installation well etc.), it is minimum to occupy space.
Description
Technical Field
The application relates to the technical field of drainage, especially, relate to a flexible cut-off equipment and drainage equipment.
Background
The current cut-off device applied to the drainage system adopts a pipeline-shaped rubber sleeve, a sealing chamber is formed between the rubber sleeve and a steel outer cover, when the chamber is inflated, the rubber sleeve is deformed to form 3 points or 4 points to be closed, and when the chamber is deflated, the rubber sleeve restores to the shape of the pipeline under the elasticity of the rubber sleeve.
However, since the pipe-shaped rubber sleeve is sleeved outside the steel housing, it must be installed transversely in a drainage system (such as a diversion well, an installation well, etc.), which occupies a large space, and especially in many wells with tight space, it cannot be installed and maintained normally.
SUMMERY OF THE UTILITY MODEL
The application provides a novel flexible cut-off equipment for solve among the prior art the rubber sleeve of pipeline form because the cover is established in the outside of steel dustcoat, make it must transversely install when the installation in drainage system (like reposition of redundant personnel well, erection well etc.), it is very big to occupy the space, especially in the nervous well in a lot of spaces, all can't normally install and the technical problem of maintaining.
In order to solve the above technical problem, in a first aspect, the present application provides a flexible cut-off device, including:
a flexible sleeve having a chamber;
the valve body is provided with a circulation channel for externally connecting a pipeline and a chute for the flexible sleeve to slide in the valve body; the flexible sleeve is arranged in the chute, and the chute is communicated with the circulation channel; the flexible sleeve slides into the flow channel from the sliding groove when expanding or slides into the sliding groove from the flow channel when contracting; wherein during expansion of the flexible sleeve, the flexible sleeve and the chute are sealingly connected;
optionally, the flexible sleeve is an airbag, and the airbag has the cavity with a hollow structure.
Optionally, the flexible sleeve has an open port extending inwardly from the chamber, the open port being adapted to fit into and sealingly engage the slot of the chute through the open port.
Optionally, the flexible cut-off device further comprises:
a gland secured to the slot to seal the open port and the slot; the gland is provided with an opening, and the opening is communicated with the cavity.
Optionally, a flange is arranged on the notch;
the open port is provided with a flange connecting part matched with the flange plate;
the gland is attached to the flange connecting part and is connected with the flange plate through a flange, and a reinforcing rib plate is arranged between the flange plate and the notch.
Optionally, the circulation channel is transversely distributed in the valve body, the sliding grooves are longitudinally distributed in the valve body, the circulation channel and the sliding grooves are perpendicular to each other, and reinforcing rib plates are arranged at the vertical crossing positions.
Optionally, the circulation channel is provided with two interfaces for connecting external pipelines, and the two interfaces extend outwards in the circulation direction of the circulation channel and are correspondingly distributed on two sides of the sliding groove.
Optionally, when the cavity is filled with the filler, the bottom of the flexible sleeve is attached to the bottom of the flow channel and is in seamless connection with the bottom of the flow channel;
and/or the presence of a gas in the gas,
the bottom of the flexible sleeve is located at the top part of the flow-through channel when the chamber is drained of the filling.
Optionally, when the cavity is filled with the filler, the bottom of the flexible sleeve is attached to the bottom of the flow channel and is in seamless connection with the bottom of the flow channel;
and/or the presence of a gas in the gas,
the bottom of the flexible sleeve is located at the top part of the flow-through channel when the chamber is drained of the filling.
Optionally, the flexible sleeve is adapted to the shape of the sliding groove and attached to the inner side wall of the sliding groove, and the inner side wall of the sliding groove is relatively inclined in the vertical direction.
In a second aspect, the present application further provides a drainage apparatus comprising the above-described flexible cut-off device.
According to the technical scheme, the method has the following advantages:
the flexible sleeve is arranged in the sliding groove of the valve body and is connected with the valve body in a sealing mode; meanwhile, the sliding groove in the valve body is communicated with the circulation channel, so that the flexible sleeve slides to the circulation channel from the sliding groove when expanding, or slides to the sliding groove from the circulation channel when contracting, the structural design ensures that the flexible sleeve does not need to be sleeved outside the circulation channel as in the prior art, and does not need to surround the whole circulation channel, but only needs to slide in the sliding groove of the valve body through expansion or contraction, the joint area of the flexible sleeve and the circulation channel is greatly reduced, the whole horizontal installation in a well is not needed when the flexible sleeve is applied to a drainage system, and the occupied space is extremely small.
The above description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented according to the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more obvious and understandable, the following detailed description of the present invention is given.
Drawings
Fig. 1 is a front view of a flexible cut-off device according to an embodiment of the present disclosure in an unfilled configuration;
FIG. 2 is a side view of FIG. 1;
FIG. 3 is a front view of a flexible flow stop device according to an embodiment of the present disclosure in a filled configuration;
fig. 4 is a side view of fig. 3.
Detailed Description
The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are only a part of the embodiments of the present disclosure, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present specification belong to the protection scope of the present invention; the "and/or" keyword referred to in this embodiment means sum or two cases, in other words, a and/or B mentioned in the embodiments of this specification means two cases of a and B, A or B, and describes three states where a and B exist, such as a and/or B, and means: only A does not include B; only B does not include A; including A and B.
Meanwhile, in the embodiments of the present description, when an element is referred to as being "fixed to" another element, it may be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used in the embodiments of the present description are for illustrative purposes only and are not intended to limit the present invention.
First, before the present application is introduced, the relevant contents of the present application with respect to the application background will be described.
The flexible intercepting device can be applied to drainage systems such as a diversion well, an intercepting well, a regulation pool and the like, and when the flexible intercepting device is applied to the diversion well, the flexible intercepting device is arranged in a sliding groove of a valve body and is connected with the valve body in a sealing mode; meanwhile, the sliding groove in the valve body is communicated with the circulation channel, so that the flexible sleeve slides to the circulation channel from the sliding groove when expanding, or slides to the sliding groove from the circulation channel when contracting, the structural design ensures that the flexible sleeve does not need to be sleeved outside the circulation channel as in the prior art, and does not need to surround the whole circulation channel, but only needs to slide in the sliding groove of the valve body through expansion or contraction, the joint area of the flexible sleeve and the circulation channel is greatly reduced, and the whole horizontal installation in the well is not needed when the flexible sleeve is applied to the shunt well, so that the flexible sleeve has the characteristic of extremely small occupied space.
In the following, the flexible cut-off device provided by the present application will be described in detail.
Example one
Referring to fig. 1-4, a flexible cut-off device according to an embodiment of the present application includes: a flexible sleeve 12 and a valve body 15. Wherein the flexible sleeve 12 has a chamber 11 which can be filled with a filling material; the valve body 15 has a flow passage 151 for externally connecting a pipe (such as a pipe inlet or a pipe outlet of a flow distribution well), and a slide groove 152 for allowing the flexible sleeve 12 to slide up and down in the valve body 15; the flexible sleeve 12 is disposed within the chute 152 and sealingly connected to the valve body 15. The slide groove 152 communicates with the flow passage 151.
In the present embodiment, the flow channel 151 may be a channel for flowing water or other fluid after communicating with a pipe inlet or a pipe outlet of a diversion well, and the flexible sleeve 12 may be a flexible bladder having a contraction and expansion function, and the expansion of the bladder is realized by filling the chamber 11 inside the flexible sleeve 12 with filler, or the contraction of the bladder is realized by discharging the filler from the chamber 11 inside the flexible sleeve 12. Meanwhile, the flexible sleeve 12 during expansion or contraction can slide up and down in the sliding groove 152 shown in fig. 1, that is, when the flexible sleeve 12 is expanded, the flexible sleeve slides down from the sliding groove 152 to the flow channel 151 and fits with the bottom of the flow channel 151, and then the flow is stopped; the flexible sleeve 12 slides upwards from the flow channel 151 to the sliding groove 152 when being contracted, and when the flexible sleeve 12 slides upwards to be separated from the bottom of the flow channel 151, the gradual conduction of the flow channel 151 is realized; those skilled in the art will appreciate that such a structure is designed such that the flexible sleeve 12 does not need to be sleeved outside the steel housing as in the prior art, and the flexible sleeve 12 does not need to envelop the whole steel housing, but only the flexible sleeve 12 needs to slide in the sliding groove 152 of the valve body 15 by expansion or contraction, so that the fitting area between the flexible sleeve 12 and the flow passage 151 is greatly reduced, and since the moving area of the expansion or contraction of the flexible sleeve 12 is longitudinally moved relative to the flow passage 151 and does not occupy a transverse space, the flexible sleeve 12 does not need to be transversely installed in the well when being applied to a shunt well, and the flexible sleeve has the characteristic of occupying a very small space.
In addition, in the process of realizing interception, as the flexible sleeve 12 slides downwards to the flow channel 151 through the sliding groove 152 and is attached to the bottom of the flow channel 151 when expanding, the contact sealing between the flexible sleeve 12 and the bottom of the flow channel 151 is surface contact, compared with the point contact in the prior art, the flexible sleeve 12 can achieve a better sealing effect, namely, a better interception effect is achieved, and in order to keep good sealing of the flexible sleeve 12 in the expansion process, the flexible sleeve 12 can be expanded in the expansion state permanently, and the flexible sleeve 12 arranged in the sliding groove 152 is in sealing connection with the valve body 15 in the embodiment.
As an embodiment of the flexible sleeve 12 in the embodiment of the present application, the flexible sleeve 12 may be a balloon having a flexible contracting or expanding function, and the inside of the balloon is a hollow structure to form a chamber 11, of course, as a further optimization of the balloon; the flexible sleeve 12 may also have an open port 121, and a chamber 11 of a closed structure is formed by extending the open port 121 inwards, and the open port 121 is matched with the slot of the sliding chute 152 and is connected with the slot of the sliding chute 152 in a sealing way through the open port 121. In particular, the open port 121 of the flexible sleeve 12 can be understood as an inlet for filling the chamber 11 with the filler, which enters the chamber 11 of the closed structure through the open port 121 and forms an expansion inside the chamber, and when the filler needs to be discharged, it is also discharged from the open port 121. It will be appreciated by those skilled in the art that the open port 121 is adapted to, i.e., sized and shaped to correspond to, the slot of the chute 152 such that the open port 121 sealingly engages the slot of the chute 152.
It should be noted that, in the embodiment of the present application, the flexible sleeve 12 is adapted to the shape of the sliding groove 152 and is attached to the inner side wall of the sliding groove 152, the inner side wall of the sliding groove 152 is inclined inward in the direction from one end of the slot to the other end of the sliding groove 152, that is, inclined inward in the vertical direction, and the port diameter of the slot is greater than the port diameter of the other end, it can be understood that the flexible sleeve 12 is the flexible sleeve 12 in the prefabricated shape, the prefabricated shape is adapted to the shape of the sliding groove 152, and the interface of the sliding groove 152 has a certain taper by the inner side wall of the sliding groove 152 being inclined inward in the direction from one end of the slot to the other end of the sliding groove 152, so that the flexible sleeve 12 in the prefabricated shape can be rapidly expanded to the bottom of the flow passage and attached to the bottom of the flow passage during the process of filling the.
Further, the embodiment of the present application further includes: a gland 13, the gland 13 being fixed to the slot to seal the open port 121 and the slot; the cover 13 is formed with a through hole 131, the through hole 131 is communicated with the chamber 11, and the chamber 11 can be filled or discharged with the filler through the through hole 131. In order to achieve a better sealing effect between the open port 121 and the sliding groove 152, the notch is bent outward in a direction perpendicular to the sliding direction of the flexible sleeve 12, so that two opposite side boundaries of the notch are L-shaped, and the open port 121 of the flexible sleeve 12 fits the bent portion of the notch and extends outward, so that the pressing cover 13 fits the open port 121 extending outward and is bolted (e.g., screwed, bolted, etc.) with the bent portion of the sliding groove 152. This achieves that the open port 121 of the flexible sleeve 12 is completely sealed from the slot by the gland 13 when the slot of the chute 152 is in position. Meanwhile, a reinforcing rib plate 153 is further provided at the bent portion in order to reinforce fastening.
Of course, the notch can also be provided with a flange; the open port 121 is provided with a flange connecting part matched with the flange plate; the gland 13 is attached to the flange connecting part and connected with a flange plate flange, and a reinforcing rib plate 153 is arranged between the flange plate and the notch.
Those skilled in the art can understand, to the sealing connection between notch and the flexible cover to the spout, can be the bolted connection of above-mentioned L type structure of buckling, also can be the flange joint of above-mentioned flange structure, and this application embodiment is not limited, as long as can realize the notch of spout and flexible cover between the relatively sealed connected mode, all is applicable to the utility model discloses.
As an embodiment of the circulation passage 151 and the slide groove 152 in the embodiment of the present application, the circulation passage 151 is laterally distributed in the valve body 15, and the slide groove 152 is longitudinally distributed in the valve body 15, that is, the circulation passage 151 and the slide groove 152 are perpendicular to each other, and also for enhancing fastening, a reinforcing rib plate 153 is provided at a perpendicular intersection portion of the circulation passage 151 and the slide groove 152.
Further, in order to facilitate quick installation between the circulation channel 151 and the pipeline, in the embodiment of the present application, two ports for externally connecting the pipeline are correspondingly disposed at two ends of the circulation channel 151, and the two ports extend outwards in a circulation direction (i.e., a transverse direction shown in the drawing) of the circulation channel 151 and are correspondingly distributed at two sides of the sliding groove 152. Therefore, the two corresponding interfaces can be connected with an external pipeline through bolts or directly and correspondingly inserted into the external pipeline to be clamped with the external pipeline.
Of course, it will be understood by those skilled in the art that the vertical distribution of the through-flow channel 151 and the chute 152 relative to each other is not absolute, and in alternative embodiments, when there is a deviation in the vertical direction of the chute 152 relative to the through-flow channel 151, or a distribution that is directly inclined, it is possible to achieve a minimum space occupation without installing it entirely transversely in the well when it is used in a flow splitting well, since its movement zone, which also corresponds to the expansion or contraction of the flexible sheath 12, is moved longitudinally or close to longitudinally relative to the through-flow channel 151, and does not occupy transverse space. Therefore, the distribution of the positions of the flow channels 151 and the chutes 152 is applicable to the embodiments of the present invention, and is within the scope of the present invention.
As an operation state of the embodiment of the present application, referring to fig. 3 to 4, when the chamber 11 is filled with the filler, the flexible sleeve 12 starts to expand until the bottom of the flexible sleeve 12 fits the bottom of the flow channel 151 and seamlessly engages with the bottom of the flow channel 151, thereby achieving the shut-off of the flow channel 151.
As a further operating condition of the embodiment of the present application, referring to fig. 1-2, when the chamber 11 is emptied of the filling material, the flexible sleeve 12 starts to contract until the bottom of the flexible sleeve 12 is located at the top portion of the through channel 151, thereby achieving complete communication of the through channel 151.
That is, in the embodiment of the present application, the expansion of the airbag is achieved by filling the chamber 11 inside the flexible sheath 12 with the filler, or the contraction of the airbag is achieved by discharging the filler from the chamber 11 inside the flexible sheath 12. Meanwhile, the flexible sleeve 12 in the expansion or contraction process can slide up and down in the sliding groove 152, that is, when the flexible sleeve 12 is expanded, the flexible sleeve slides down to the flow channel 151 from the sliding groove 152 and is attached to the bottom of the flow channel 151, the flow stopping is realized; the flexible sleeve 12 slides upwards from the flow channel 151 to the chute 152 when being contracted, and when the flexible sleeve 12 slides upwards to be separated from the bottom of the flow channel 151, the gradual conduction of the flow channel 151 is realized; the structural design does not need to sleeve the flexible sleeve 12 outside the steel housing as in the prior art, nor needs the flexible sleeve 12 to envelop the whole steel housing, but only needs the flexible sleeve 12 to slide in the sliding groove 152 of the valve body 15 through expansion or contraction, so that the joint area of the flexible sleeve 12 and the flow channel 151 is greatly reduced, and the moving area of the flexible sleeve 12 due to expansion or contraction is longitudinally moved relative to the flow channel 151 and does not occupy a transverse space, so that the flexible sleeve is applied to a shunt well without being transversely installed in the well.
Finally, it is necessary to supplement that the filling material in the embodiment of the present application may be a gas (such as air, nitrogen, inert gas, etc.) or a liquid (such as hydraulic oil, water), etc. Preferably, the filling material is selected from gases, which can be rapidly filled or discharged, so that the flexible sleeve 12 can be rapidly expanded or contracted, and then the technical effect of rapid closure or passing can be achieved.
Example two
Corresponding to the first embodiment of the present application, the second embodiment of the present application provides a drainage apparatus, which includes the flexible cut-off device provided in the first embodiment, and it is understood that the drainage apparatus may be any drainage apparatus in a pipe network system, such as a diversion well, an intercepting well, an installation well, a storage tank, or a drainage system including a diversion well, an intercepting well, an installation well, a storage tank, or other tank bodies, and when the drainage apparatus includes the flexible cut-off device provided in the first embodiment, the flexible cut-off device can be applied to shut off the structures of the diversion well, the intercepting well, the installation well, the storage tank, or other tank bodies, for example, when the diversion well, the intercepting well, the installation well, the storage tank, or other tank bodies need to be shut off, so as to replace the pipe-shaped rubber sleeve adopted in the prior art, a sealed chamber is formed between the rubber sleeve and the steel housing, and when the chamber is inflated, the, when the cavity is deflated, the rubber sleeve is restored to the intercepting device in the shape of the pipeline under the elasticity of the rubber sleeve, the technical problems that the pipeline-shaped rubber sleeve is sleeved outside the steel outer cover, the rubber sleeve needs to be transversely installed in a drainage system (such as a diversion well, an installation well and the like) when being installed, the occupied space is extremely large, and the rubber sleeve cannot be normally installed and maintained in a plurality of wells with nervous space are solved.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the examples, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the scope of the claims of the present invention.
Claims (11)
1. A flexible flow stop device, comprising:
a flexible sleeve (12), said flexible sleeve (12) having a chamber (11);
the valve body (15), the said valve body (15) has a circulation channel (151) used for external pipeline and a runner (152) used for the said flexible sleeve (12) to slip in the said valve body (15); the flexible sleeve (12) is arranged in the sliding groove (152), and the sliding groove (152) is communicated with the circulating channel (151); the flexible sleeve (12) slides from the runner (152) into the flow channel (151) when expanded, or the flexible sleeve (12) slides from the flow channel (151) into the runner (152) when contracted; wherein the flexible sleeve (12) and the chute (152) are sealingly connected during expansion of the flexible sleeve (12).
2. The flexible cut-off device of claim 1, wherein:
the flexible sleeve (12) is an air bag having the chamber (11) in a hollow structure.
3. The flexible cut-off device of claim 1, wherein:
the flexible sleeve (12) is provided with an open port (121), the chamber (11) is formed by extending inwards from the open port (121), the open port (121) is matched with the notch of the sliding chute (152), and the open port (121) is connected with the notch of the sliding chute (152) in a sealing mode.
4. The flexible stop of claim 3, further comprising:
a gland (13), the gland (13) being secured to the slot to seal the open port (121) and the slot; the gland (13) is provided with a through hole (131), and the through hole (131) is communicated with the cavity (11).
5. The flexible cut-off device of claim 4, wherein:
a flange plate is arranged on the notch;
the open port (121) is provided with a flange connecting part matched with the flange plate;
the gland (13) is attached to the flange connecting part and is connected with the flange plate through a flange, and a reinforcing rib plate (153) is arranged between the flange plate and the notch.
6. The flexible cut-off device as claimed in any one of claims 1 to 5, wherein:
the flow channel (151) is transversely distributed in the valve body (15), the sliding grooves (152) are longitudinally distributed in the valve body (15), the flow channel (151) and the sliding grooves (152) are perpendicular to each other, and reinforcing rib plates (153) are arranged at the vertical intersection positions.
7. The flexible cut-off device of claim 6, wherein:
the circulation channel (151) is provided with two interfaces for externally connecting a pipeline, the two interfaces extend outwards in the circulation direction of the circulation channel (151) and are correspondingly distributed on two sides of the sliding groove (152).
8. The flexible cut-off device as claimed in any one of claims 1 to 5, wherein:
when the chamber (11) is filled with the filler, the bottom of the flexible sleeve (12) is attached to the bottom of the flow channel (151) and is in seamless connection with the bottom of the flow channel (151);
and/or the presence of a gas in the gas,
the bottom of the flexible sleeve (12) is located at the top part of the flow-through channel (151) when the chamber (11) is emptied of filling.
9. The flexible cut-off device of claim 6, wherein:
when the chamber (11) is filled with the filler, the bottom of the flexible sleeve (12) is attached to the bottom of the flow channel (151) and is in seamless connection with the bottom of the flow channel (151);
and/or the presence of a gas in the gas,
the bottom of the flexible sleeve (12) is located at the top part of the flow-through channel (151) when the chamber (11) is emptied of filling.
10. The flexible cut-off device as claimed in any one of claims 3 to 5, wherein:
the flexible sleeve (12) is matched with the sliding groove (152) in shape and attached to the inner side wall of the sliding groove (152), and the inner side wall of the sliding groove (152) is relatively inclined in the vertical direction.
11. A drain, characterized in that it comprises a flexible cut-off device according to any one of claims 1-10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021812983.6U CN212616435U (en) | 2020-08-26 | 2020-08-26 | Flexible cut-off equipment and drainage equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021812983.6U CN212616435U (en) | 2020-08-26 | 2020-08-26 | Flexible cut-off equipment and drainage equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212616435U true CN212616435U (en) | 2021-02-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021812983.6U Active CN212616435U (en) | 2020-08-26 | 2020-08-26 | Flexible cut-off equipment and drainage equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212616435U (en) |
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2020
- 2020-08-26 CN CN202021812983.6U patent/CN212616435U/en active Active
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Address after: No. 509 Weihu Road, Shamao Street, Hannan District, Wuhan City, Hubei Province, 430090 Patentee after: Wuhan Shengyu Smart Ecological Environmental Protection Co.,Ltd. Address before: 430056 3rd floor, workshop 1, No. 189, North Qianli Road, Wuhan Economic and Technological Development Zone, Hubei Province Patentee before: WUHAN SHENGYU DRAINAGE SYSTEM Co.,Ltd. |