CN111535517A - Ejector pin type self-dredging roof floor drain cover plate - Google Patents
Ejector pin type self-dredging roof floor drain cover plate Download PDFInfo
- Publication number
- CN111535517A CN111535517A CN202010389240.0A CN202010389240A CN111535517A CN 111535517 A CN111535517 A CN 111535517A CN 202010389240 A CN202010389240 A CN 202010389240A CN 111535517 A CN111535517 A CN 111535517A
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- China
- Prior art keywords
- water
- wall
- water inlet
- circular plate
- floor drain
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 110
- 239000012535 impurity Substances 0.000 claims abstract description 14
- 238000007789 sealing Methods 0.000 claims description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000009435 building construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002940 repellent Effects 0.000 description 1
- 239000005871 repellent Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D13/00—Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage ; Sky-lights
- E04D13/04—Roof drainage; Drainage fittings in flat roofs, balconies or the like
- E04D13/0404—Drainage on the roof surface
- E04D13/0409—Drainage outlets, e.g. gullies
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04D—ROOF COVERINGS; SKY-LIGHTS; GUTTERS; ROOF-WORKING TOOLS
- E04D13/00—Special arrangements or devices in connection with roof coverings; Protection against birds; Roof drainage ; Sky-lights
- E04D13/04—Roof drainage; Drainage fittings in flat roofs, balconies or the like
- E04D13/0404—Drainage on the roof surface
- E04D13/0409—Drainage outlets, e.g. gullies
- E04D2013/0427—Drainage outlets, e.g. gullies with means for controlling the flow in the outlet
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Abstract
The invention discloses a thimble type self-dredging roof floor drain cover plate which comprises a circular plate arranged at a roof floor drain port, wherein a conical cavity is formed in the circular plate, a plurality of water inlets communicated with the upper end of the circular plate are uniformly distributed at the top in the conical cavity, and a water outlet communicated with the lower end of the circular plate is formed in the bottom in the conical cavity. According to the invention, the water wheel is driven to rotate by turbulent water flow flowing down from the water inlet, the one-way bearing is driven to rotate to apply force to the coil spring, when impurities on the roof are brought into the water inlet along with continuous inflow of the water flow, the water flow is reduced due to the blockage of the water inlet, so that the elastic force on the coil spring is far greater than the rotating force of the water wheel during rotation, the coil spring releases the elastic force, the rotating shaft drives the sliding rod to slide on the inner wall of the annular groove, the magnet continuously skims over the magnetic sliding block, the ejector pin continuously enters the water inlet, the water inlet is dredged, and the phenomenon that.
Description
Technical Field
The invention relates to the technical field of building accessories, in particular to a thimble type self-dredging roof floor drain cover plate.
Background
When building construction, in order to avoid the situations of floor water seepage and the like caused by roof water accumulation, a floor drain cover plate is required to be installed on the roof for draining water.
Building construction is higher among the modern construction for the floor drain apron leads to the rainwater to lead to in the floor drain apron that impurity drainage extremely on the roof behind the installation to the water hole mediation very few, long-time down leads to in the floor drain apron that the rainwater can lead to the roof ponding more, especially in some plum rain seasons, the rainfall is many and big, and the floor drain apron is slower to the exhaust velocity of rainwater this moment, makes ponding on the roof unable quick discharge, leads to the infiltration of house top layer down for a long time, seriously influences the life of building body.
Therefore, we propose a thimble type self-dredging roof floor drain cover plate to solve the above problems.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a thimble type self-dredging roof floor drain cover plate.
In order to achieve the purpose, the invention adopts the following technical scheme:
a thimble type self-dredging roof floor drain cover plate comprises a circular plate placed at a roof floor drain port, wherein a conical cavity is formed in the circular plate, a plurality of water inlets communicated with the upper end of the circular plate are uniformly formed in the top of the conical cavity, a water outlet communicated with the lower end of the circular plate is formed in the bottom of the conical cavity, a circular groove is formed in the top of the conical cavity, a one-way bearing is rotatably connected to the top of the circular groove, a coil spring is sleeved on the side wall of the one-way bearing, the inner end of the coil spring is fixedly connected with the outer wall of the one-way bearing, the outer end of the coil spring is fixedly connected with the inner wall of the circular groove, the outer wall of the one-way bearing is fixedly connected with a sleeve through a support, a plurality of water wheels are uniformly and fixedly connected to the lower, and an ejection device for ejecting impurities in the water inlet is arranged in the annular groove.
Preferably, ejecting device includes the slide bar of sliding connection at the ring channel inner wall, just the one end and the pivot lateral wall below fixed connection that the ring channel inner wall was kept away from to the slide bar, a plurality of recesses have been seted up at the top in the ring channel, and are a plurality of the recess is corresponding with a plurality of water inlets, and is a plurality of recess inner wall sliding connection has the magnetic slide, magnetic slide upper end fixedly connected with thimble, the thimble upper end run through the plectane lateral wall and with plectane lateral wall sealing sliding connection, the bottom passes through spring and magnetic slide upper end elastic connection in the recess, the upper end fixedly connected with that the pivot was kept away from to the slide bar is with the like magnetic slide repellent.
Preferably, the inner wall of the water inlet is provided with a plurality of fine holes which are obliquely arranged in the conical cavity.
The invention has the following beneficial effects:
1. by arranging the coil spring, the one-way bearing, the sleeve, the water wheel, the rotating shaft and the sliding rod, the water flow enters the water accumulation port at the beginning and is more turbulent, so that the water flow drives the water wheel to rotate, the water wheel drives the outer ring of the one-way bearing to rotate through the sleeve, the coil spring fixedly connected with the outer ring of the one-way bearing is stressed, when the elastic force of the coil spring is equal to the rotating force generated by the rotation of the water wheel, the water wheel does not rotate, the impurities on the roof can be brought into the water inlet along with the continuous inflow of the water flow, the water inlet is blocked to reduce the water flow, the elastic force of the coil spring is far greater than the rotating force generated by the water wheel under the action of the smaller water flow, at the moment, the coil spring releases the elastic force, the rotating shaft is driven to rotate rapidly, the sliding rod is driven to slide, impurities in the water inlet are ejected out, so that excessive water accumulated on the roof due to blockage of the water inlet is avoided, and the service life of a building body is prevented from being influenced;
2. when the coil spring releases elasticity to drive the one-way bearing to rotate rapidly, the sleeve drives the water wheel to rotate rapidly, so that the water wheel rotates rapidly to generate a pressure difference which is small at the top and big at the bottom, a suction force is generated in the water inlet, and the water discharging capacity of the water inlet is improved;
3. through the fine holes which are obliquely arranged towards the conical cavity at the water inlet, the gas which flows rapidly and is generated by the rapid rotation of the water wheel can generate suction force in the water inlet, so that the suction force of the fine holes to the water inlet is larger according to the siphon effect, and the water drainage capability of the water inlet is further improved;
4. through the change of the velocity of flow of the rivers of inlet for the water inlet that the thimble can be proper motion is dredged, need not artificial intervention, and the effectual quick discharge of ponding to the roof maintains the quality of building body.
Drawings
Fig. 1 is a schematic structural diagram of a first embodiment of the present invention;
FIG. 2 is an enlarged view of the structure at A in FIG. 1;
FIG. 3 is a schematic structural diagram of a second embodiment of the present invention;
in the figure: the device comprises a circular plate 1, a conical cavity 2, a water inlet 3, a water outlet 4, a circular groove 5, a one-way bearing 6, a coil spring 7, a sleeve 8, a water wheel 9, a rotating shaft 10, an annular groove 11, a sliding rod 12, a groove 13, a magnetic slider 14, an ejector pin 15, a spring 16, a magnet 17, an air vent 18 and a pore 19.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present invention is capable of modification in various respects, all without departing from the spirit and scope of the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Example one
Referring to fig. 1-2, a thimble type self-dredging roof floor drain cover plate comprises a circular plate 1 placed at a roof floor drain port, a conical cavity 2 is arranged in the circular plate 1, a plurality of water inlets 3 communicated with the upper end of the circular plate 1 are uniformly distributed at the top in the conical cavity 2, a water outlet 4 communicated with the lower end of the circular plate 1 is arranged at the bottom in the conical cavity 2, a circular groove 5 is arranged at the top in the conical cavity 2, a one-way bearing 6 is rotatably connected with the top in the circular groove 5, a coil spring 7 is sleeved on the side wall of the one-way bearing 6, the inner end of the coil spring 7 is fixedly connected with the outer wall of the one-way bearing 6, the outer wall of the one-way bearing 6 is fixedly connected with a sleeve 8 through a bracket, a plurality of water wheels 9 are uniformly distributed and fixedly connected below the side wall of the sleeve 8, a rotating shaft, when the rainwater on the roof is just discharged from the water inlet 3, no impurities exist in the water inlet 3, the water flowing in from the water inlet 3 is turbulent, so that the water flow drives the water wheel 9 to rotate rapidly, the outer ring of the one-way bearing 6 is further driven to rotate, the coil spring 7 is forced, when the elastic force on the coil spring 7 is equal to the rotating force of the water wheel 9 during rotation, the water wheel 9 does not rotate, the water continues to flow down from the water inlet 3 at the moment, the impurities on the roof are brought to the water inlet 3 along with the continuous discharge of the water flow, the impurities on the roof can block the water inlet 3, the water flow is small at the moment, the rotating force of the water wheel 9 under the action of the water flow is far smaller than the elastic force of the coil spring 7, the coil spring 7 releases the elastic force, the rotating shaft 10 and the water wheel 9 are driven to rotate reversely, the rapidly-rotating water wheel 9, the water discharging capacity of the water inlet 3 is improved, the annular groove 11 is formed in the inner wall of the water outlet 4, and the ejection device for ejecting impurities in the water inlet 3 is installed in the annular groove 11.
The ejection device comprises a slide rod 12 connected to the inner wall of the annular groove 11 in a sliding manner, one end of the slide rod 12, which is far away from the inner wall of the annular groove 11, is fixedly connected with the lower part of the side wall of the rotating shaft 10, the top in the annular groove 11 is provided with a plurality of grooves 13, the plurality of grooves 13 correspond to the plurality of water inlets 3, the inner wall of the plurality of grooves 13 is connected with a magnetic slider 14 in a sliding manner, further, the inner wall of each groove 13 is provided with an air vent 18 communicated with the outside for balancing the pressure generated when the magnetic slider 14 moves up and down in the groove 13, the upper end of the magnetic slider 14 is fixedly connected with an ejector pin 15, the upper end of the ejector pin 15 penetrates through the side wall of the circular plate 1 and is connected with the side wall of the circular plate 1 in a sealing and sliding manner, the bottom in each groove 13 is elastically connected with the upper end of the magnetic, so that the magnet 17 fixedly connected to the upper end of the sliding rod 12 continuously skims over the magnetic slider 14 slidably connected in the groove 13, the magnetic slider 14 drives the thimble 15 to move up and down under the action of the magnetic force and the spring 16, impurities in the water inlet 3 are ejected out, and the drainage capacity of the water inlet 3 is improved.
In this embodiment, when water flows down rapidly from the water inlet 3, the water flow drives the water wheel 9 fixedly connected to the side wall of the sleeve 8 to rotate, and drives the outer ring of the one-way bearing 6 fixedly connected to the sleeve 8 to rotate, and drives the coil spring 7 fixedly connected between the inner wall of the circular groove 5 and the outer ring of the one-way bearing 6 to rotate, and forces the coil spring 7, and when the force of the coil spring 7 is applied to cause the elastic force on the coil spring 7 to be the same as the rotating force of the water wheel 9 when rotating, the water wheel 9 does not rotate, and the water flow is discharged continuously, and the impurities on the roof are brought to the water inlet 3 to block the water inlet 3, and the water flow is small at this time, so that the rotating force of the water wheel 9 under the action of the water flow is much smaller than the elastic force of the coil spring 7, and the coil spring 7 releases the elastic force, and, so that the magnet 17 fixedly connected to the upper end of the sliding rod 12 continuously grabs the magnetic slider 14 slidably connected to the inner wall of the groove 13, when the magnet 17 is aligned with the magnetic slider 14, the magnetic slider 14 slides upwards on the inner wall of the groove 13 under the action of magnetic force to drive the thimble 15 fixedly connected to the upper end of the magnetic slider 14 to move upwards, and ejects impurities in the water inlet 3, when the magnet 17 is separated from the magnetic slider 14, the magnetic slider 14 moves downwards under the action of the spring 16 to drive the thimble 15 to move downwards, so that when the sliding rod 12 rotates continuously and rapidly, the thimble 15 continuously moves upwards and downwards, and ejects impurities in the water inlet 3, and the water inlet 3 is dredged.
Example two
Referring to fig. 3, unlike the first embodiment, the inner wall of the water inlet 3 is provided with a plurality of fine holes 19 which are inclined toward the tapered cavity 2.
In this embodiment, when 7 release elasticity of coil spring drive water wheels 9 reverse rotation fast, the gas that the fast flow that this moment water wheels 9 fast turn-round produced can produce suction in to water inlet 3, according to the siphon effect for pore 19 department is great to the suction of water inlet 3 department, further improves the drainage ability of water inlet 3 department, avoids water inlet 3 department because the rivers discharge ability that the jam leads to is slower, makes roof ponding more.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (3)
1. A thimble type self-dredging roof floor drain cover plate comprises a circular plate (1) placed at a roof floor drain port, and is characterized in that a conical cavity (2) is formed in the circular plate (1), a plurality of water inlets (3) communicated with the upper end of the circular plate (1) are uniformly formed in the inner top of the conical cavity (2), a water outlet (4) communicated with the lower end of the circular plate (1) is formed in the inner bottom of the conical cavity (2), a circular groove (5) is formed in the inner top of the conical cavity (2), a one-way bearing (6) is rotatably connected to the inner top of the circular groove (5), a coil spring (7) is sleeved on the side wall of the one-way bearing (6), the inner end of the coil spring (7) is fixedly connected with the outer wall of the one-way bearing (6), the outer end of the coil spring (7) is fixedly connected with the inner wall of the circular groove (5), sleeve (8) lateral wall below equipartition a plurality of water wheels of fixedly connected with (9), sleeve (8) inner wall cover is equipped with pivot (10), pivot (10) lateral wall and one-way bearing (6) inner wall fixed connection, ring channel (11) have been seted up to delivery port (4) inner wall, install in ring channel (11) and carry out ejecting device to the impurity in water inlet (3).
2. The thimble type self-dredging type roof floor drain cover plate according to claim 1, wherein the ejection device comprises a slide rod (12) which is slidably connected to the inner wall of the annular groove (11), one end of the slide rod (12) far away from the inner wall of the annular groove (11) is fixedly connected with the lower portion of the side wall of the rotating shaft (10), a plurality of grooves (13) are formed in the inner top of the annular groove (11), the plurality of grooves (13) correspond to the plurality of water inlets (3), a magnetic slider (14) is slidably connected to the inner wall of the plurality of grooves (13), an ejector thimble (15) is fixedly connected to the upper end of the magnetic slider (14), the upper end of the ejector (15) penetrates through the side wall of the circular plate (1) and is in sealing and sliding connection with the side wall of the circular plate (1), the inner bottom of the groove (13) is elastically connected with the upper end of the magnetic slider (14) through a spring (16), and the upper end of the slide rod (12) far The magnet (17).
3. The thimble type self-dredging roof floor drain cover plate according to claim 1, wherein the inner wall of the water inlet (3) is provided with a plurality of fine holes (19) which are inclined towards the inner side of the conical cavity (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010389240.0A CN111535517A (en) | 2020-05-10 | 2020-05-10 | Ejector pin type self-dredging roof floor drain cover plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010389240.0A CN111535517A (en) | 2020-05-10 | 2020-05-10 | Ejector pin type self-dredging roof floor drain cover plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111535517A true CN111535517A (en) | 2020-08-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010389240.0A Withdrawn CN111535517A (en) | 2020-05-10 | 2020-05-10 | Ejector pin type self-dredging roof floor drain cover plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111535517A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111706012A (en) * | 2020-06-29 | 2020-09-25 | 曹美丽 | Prevent ponding roof floor drain apron |
| CN117401754A (en) * | 2023-11-03 | 2024-01-16 | 上海灿星环境科技有限公司 | Facility and process for treating raw material medicine wastewater |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100941031B1 (en) * | 2009-10-16 | 2010-02-10 | 박판석 | Manhole impurity hide an automatic switch |
| CN108252391A (en) * | 2018-01-10 | 2018-07-06 | 曹先锋 | A kind of road draining device and its application method |
| CN108824608A (en) * | 2018-09-05 | 2018-11-16 | 浙江海洋大学 | A kind of anti-blockage type floor drain |
| CN108867833A (en) * | 2018-08-28 | 2018-11-23 | 张兵 | A kind of siphon inspection well cover |
| CN108905334A (en) * | 2018-08-25 | 2018-11-30 | 李安稳 | A kind of self-loopa sewage-treatment plant |
| CN109113097A (en) * | 2018-08-21 | 2019-01-01 | 田希良 | A kind of thimble-type based on hydraulic pressure is from dredging composite manhole cover |
| CN208950034U (en) * | 2018-08-16 | 2019-06-07 | 高谦 | A kind of road rainwater collecting well lid having anti-blockage function |
-
2020
- 2020-05-10 CN CN202010389240.0A patent/CN111535517A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100941031B1 (en) * | 2009-10-16 | 2010-02-10 | 박판석 | Manhole impurity hide an automatic switch |
| CN108252391A (en) * | 2018-01-10 | 2018-07-06 | 曹先锋 | A kind of road draining device and its application method |
| CN208950034U (en) * | 2018-08-16 | 2019-06-07 | 高谦 | A kind of road rainwater collecting well lid having anti-blockage function |
| CN109113097A (en) * | 2018-08-21 | 2019-01-01 | 田希良 | A kind of thimble-type based on hydraulic pressure is from dredging composite manhole cover |
| CN108905334A (en) * | 2018-08-25 | 2018-11-30 | 李安稳 | A kind of self-loopa sewage-treatment plant |
| CN108867833A (en) * | 2018-08-28 | 2018-11-23 | 张兵 | A kind of siphon inspection well cover |
| CN108824608A (en) * | 2018-09-05 | 2018-11-16 | 浙江海洋大学 | A kind of anti-blockage type floor drain |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111706012A (en) * | 2020-06-29 | 2020-09-25 | 曹美丽 | Prevent ponding roof floor drain apron |
| CN117401754A (en) * | 2023-11-03 | 2024-01-16 | 上海灿星环境科技有限公司 | Facility and process for treating raw material medicine wastewater |
| CN117401754B (en) * | 2023-11-03 | 2024-06-25 | 上海灿星环境科技有限公司 | Facility and process for treating raw material medicine wastewater |
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| PB01 | Publication | ||
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20200814 |
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| WW01 | Invention patent application withdrawn after publication |