CN109083259B

CN109083259B - Drainage cover

Info

Publication number: CN109083259B
Application number: CN201811169426.4A
Authority: CN
Inventors: 胡家美; 其他发明人请求不公开姓名
Original assignee: Shaoxing Lanhai Environmental Protection Technology Co ltd
Current assignee: Shandong Jiuzhou Automobile Manufacturing Co ltd
Priority date: 2018-10-08
Filing date: 2018-10-08
Publication date: 2020-06-23
Anticipated expiration: 2038-10-08
Also published as: CN109083259A

Abstract

The invention discloses a drainage cover. In the invention, a floating rod extends into the second drainage hole from the upper part of the second drainage hole, extends downwards through the whole drainage channel and then extends into the supporting seat, and the upper end of the floating rod is connected with a floating cover; the lower end of the floating rod is provided with an accommodating channel from bottom to top, the upper end of an expansion spring is connected to the top end in the accommodating channel, and the lower end of the expansion spring is connected with the conducting strip. When the height of the floating cover fluctuates in a certain range, the conducting strips can be in continuous contact with the outer conducting ring and the inner conducting ring above the floating cover through the elastic expansion of the expansion spring, so that the spiral blades are continuously driven to rotate to continuously conduct and clear water flow.

Description

Drainage cover

Technical Field

The present invention relates to a drain cover.

Background

Drainage lid (well lid), mainly used covers the well body to prevent people or object from falling. Meanwhile, some drainage covers are provided with corresponding drainage holes, and the drainage holes can temporarily play a certain drainage role in rainy seasons. However, the drain hole of the drain cover is often clogged during normal use, which will certainly adversely affect the speed of drainage, and the bottom odor is easily diffused out through the drain hole.

Disclosure of Invention

1. Technical problem to be solved by the invention

The invention overcomes the defect that the existing well cover can not effectively prevent blockage and prevent odor at the same time.

2. Technical scheme

In order to achieve the purpose, the technical scheme provided by the invention is as follows:

the drain cover of the present invention comprises:

the manhole cover comprises a manhole cover body, wherein a manhole cover mounting seat is enclosed on the outer side surface of the manhole cover body, and two annular concentric isolation walls are arranged on the upper surface of the manhole cover body; the inner side of the partition wall positioned on the inner side is provided with a convex circular truncated cone, and corresponding annular grooves are respectively formed between the convex circular truncated cone and the partition wall on the inner side, between the partition wall on the inner side and the partition wall on the outer side, and between the partition wall on the outer side and the well cover mounting seat; two criss-cross diversion grooves are formed in the protruding round platform, and two ends of each diversion groove extend towards the outer edge of the well lid body respectively and penetrate through the inner side and the outer side of the isolation wall respectively;

the first drainage hole is correspondingly arranged at the intersection of one diversion trench and the inner side isolation wall, and the second drainage hole is correspondingly arranged at the intersection of the other diversion trench and the inner side isolation wall; the first drain hole and the second drain hole are through holes in the upper surface of the well lid body;

the upper surface of the well lid body is provided with an orifice convex ring surrounding the outer edge of the second drain hole; a drainage channel penetrating through the whole well lid body is arranged in the second drainage hole in a downward extending mode, a floating rod extends into the second drainage hole from the upper side of the second drainage hole, extends downwards through the whole drainage channel and then extends into the supporting seat, the upper end of the floating rod is connected with a circular floating cover, the diameter of the floating cover is larger than the outer diameter of the orifice convex ring, an accommodating channel is formed in the lower end of the floating rod from bottom to top, the upper end of a telescopic spring is connected to the top end in the accommodating channel, and the lower end of the telescopic spring is connected with the conducting strip; the top surface in the supporting seat is fixed with an inner conducting ring and an outer conducting ring which are annular and concentric, and the inner conducting ring is not contacted with the outer conducting ring;

a positioning cylinder extends upwards from the upper surface of the supporting seat and is sleeved outside the floating rod, the upper end of the positioning cylinder is positioned below the second drain hole, cross rods extend towards two sides of the upper end of the positioning cylinder respectively, and one ends of the cross rods, far away from the positioning cylinder, are fixedly connected to the inner side wall of the drainage channel; a spiral shaft tube is sleeved outside the positioning tube, and a spiral blade is fixed on the outer side surface of the spiral shaft tube; the lower part of the spiral shaft tube is connected with a rotating wheel on an output shaft of the motor through a transmission belt; the positive input end of the motor is connected with the positive output end of the storage battery through a lead, the negative input end of the motor is separately connected with the two outer conducting rings through leads, and the negative output end of the storage battery is separately connected with the two inner conducting rings through leads;

the upper surface of the well lid body is provided with an orifice vertical ring surrounding the outer edge of the first drainage hole; the side wall of the orifice vertical ring is provided with a plurality of water through holes penetrating through the side wall of the orifice vertical ring; an automatic water dropping tank extends downwards from the first drainage hole, the top end of the automatic water dropping tank is communicated with the corresponding first drainage hole, a water dropping hole is formed in the bottom end of the automatic water dropping tank, one side of the water dropping hole is connected with a water plug capable of sealing the water dropping hole through a fixed rotating shaft, and the water plug is connected with a floating ball positioned in the automatic water dropping tank through a traction line; a water falling hole at the bottom end of the automatic water falling tank is communicated with a water inlet pipe of a hydraulic generator positioned below the automatic water falling tank; the hydraulic generator is electrically connected with the storage battery;

a cylindrical membrane sleeved outside the floating rod is arranged above the positioning cylinder, the upper end of the cylindrical membrane is connected to the outer side wall of the floating rod, and the lower end of the cylindrical membrane is connected to the upper end of the positioning cylinder;

the two sides of the top end of the automatic water tank falling device are respectively fixed with a water tank clamping block, and the top end of the side wall of the orifice vertical ring is provided with a clamping groove for embedding the corresponding water tank clamping block from top to bottom.

Preferably, the supporting seat is arranged on a filter screen below the supporting seat, and the filter screen is connected to the well lid body through a fixing rod.

3. Advantageous effects

In the invention, when the water flow is relatively large, the floating cover floats from the orifice convex ring under the buoyancy action of the water, at the moment, the water flow can flow into the orifice convex ring from between the floating cover and the top surface of the orifice convex ring and is discharged, when the water flow cannot be discharged in time or the rainfall is too large to form accumulated water with a certain depth above the orifice convex ring, the floating cover floats to a certain height and drives the floating rod and the conducting strip connected with the lower end of the floating rod to move upwards together, when the conducting strip moves upwards to a certain position, the conducting strip is simultaneously contacted with the outer conducting ring and the inner conducting ring above, so that a series circuit formed by a storage battery and a motor is conducted, a rotating shaft of a power output end of the motor simultaneously drives two spiral shaft tubes to rotate through a transmission belt, and as the rotating spiral blades have the vertical downward flow guiding effect on the water flow, on one hand, the flow and the flow speed of the water flow in a drainage, more importantly, solids such as impurity particles and the like accumulated in the drainage channel are stirred and crushed, so that the drainage channel is kept always smooth, and the anti-blocking function is realized.

Drawings

FIG. 1 is a perspective view of a drain cover of an embodiment (omitting a filter material in a second drain hole);

FIG. 2 is a perspective view of FIG. 1 taken along line B-B;

FIG. 3 is a schematic sectional view along the direction B-B in FIG. 1 (the partition wall above the manhole cover body is omitted);

FIG. 4 is a schematic sectional view along A-A of FIG. 1 (the partition wall above the well lid body is omitted);

FIG. 5 is a schematic structural view of a power generation mechanism in the embodiment;

FIG. 6 is a schematic structural view of the float and the support seat in the embodiment (the support seat is cut away);

FIG. 7 is a schematic structural diagram of a spiral knife, a float and a support seat in the embodiment;

FIG. 8 is a partial enlarged view A of FIG. 7;

FIG. 9 is a second enlarged view of a portion B of FIG. 7;

FIG. 10 is a diagram showing the positional relationship among the strainer, the automatic water dropping tank and the spiral blade in the embodiment;

FIG. 11 is a partial structural view of the lower end of the float rod in the embodiment.

The reference numerals in the schematic drawings illustrate: 100. a well lid body; 110. a partition wall; 101. floating; 111. a conductive sheet; 121. a floating cover; 131. a float rod; 102. a well cover mounting seat; 103. a second drain hole; 113. an orifice convex ring; 104. a first drain hole; 114. an orifice vertical ring; 124. a card slot; 134. a water through hole; 105. automatically dropping the water tank; 115. a floating ball; 125. a water plug; 135. a water tank clamping block; 145. a filter material; 155. fixing the rotating shaft; 106. an annular groove; 107. a diversion trench; 201. a supporting seat; 211. an outer conducting ring; 221. an inner conductive ring; 202. a drive belt; 203. a cross bar; 213. a cylindrical membrane; 220. a helical shaft tube; 230. a helical blade; 231. a positioning cylinder; 241. a tension spring; 300. a storage battery; 301. an electric motor; 302. a security box; 400. filtering with a screen; 401. fixing the rod; 500. a hydro-generator; 501. a fixed arm; 502. a water inlet pipe; 503. and (5) discharging a water pipe.

Detailed Description

Example 1

Referring to fig. 1 to 10, the drain cover of the present embodiment includes:

the manhole cover comprises a manhole cover body 100 (refer to fig. 1), wherein a manhole cover mounting seat 102 is enclosed on the outer side surface of the manhole cover body 100, and two annular concentric isolation walls 110 are arranged on the upper surface of the manhole cover body 100; the inner side of the partition wall 110 positioned on the inner side is provided with a convex circular truncated cone, and corresponding annular grooves 106 are respectively formed between the convex circular truncated cone and the partition wall 110 on the inner side, between the partition wall 110 on the inner side and the partition wall 110 on the outer side, and between the partition wall 110 on the outer side and the well lid mounting seat 102; two criss-cross guide grooves 107 are formed in the convex circular truncated cone, and two ends of each guide groove 107 extend towards the outer edge of the well lid body 100 and respectively penetrate through the inner and outer partition walls 110 in sequence;

two first drainage holes 104 and two second drainage holes 103, wherein one first drainage hole 104 is correspondingly arranged at the intersection of one flow guide groove 107 and the inner side partition wall 110, and one second drainage hole 103 is correspondingly arranged at the intersection of the other flow guide groove 107 and the inner side partition wall 110; the first drain hole 104 and the second drain hole 103 are through holes on the upper surface of the well lid body 100;

referring to fig. 2, 3 and 7, the upper surface of the manhole cover body 100 is provided with an orifice convex ring 113 surrounding the outer edge of the second drainage hole 103; a drainage channel penetrating through the whole well lid body 100 is formed by extending downwards from the inside of the second drainage hole 103, a floating rod 131 extends into the second drainage hole 103 from the upper part of the second drainage hole 103, extends downwards through the whole drainage channel and then extends into the supporting seat 201, the upper end of the floating rod 131 is connected with a circular floating cover 121, the diameter of the floating cover 121 is larger than the outer diameter of the orifice convex ring 113, and the lower end of the floating rod 131 is connected with a conductive sheet 111 (the floating rod 131 is made of insulating materials); the inner ring 221 and the outer ring 211 are fixed on the top surface of the support base 201, and the inner ring 221 and the outer ring 211 are not in contact.

Referring to fig. 7, 8 and 9, a positioning tube 231 extends upward from the upper surface of the supporting base 201, the positioning tube 231 is sleeved outside the floating rod 131, the upper end of the positioning tube 231 is located below the second water drainage hole 103, a cross bar 203 extends from the upper end of the positioning tube 231 to both sides, and one end of the cross bar 203, which is far away from the positioning tube 231, is fixedly connected to the inner side wall of the water drainage channel; the outer side of the positioning cylinder 231 is sleeved with a spiral shaft tube 220, and the outer side surface of the spiral shaft tube 220 is fixed with a spiral blade 230; the lower part of the spiral shaft tube 220 is connected with a rotating shaft of the power output end through a transmission belt 202 (in this embodiment, the lower part of the spiral shaft tube 220 is connected with a rotating wheel on the output shaft of the motor 301 through the transmission belt 202, that is, the transmission belt 202 is sleeved on the outer diameter of the rotating wheel and can be transmitted with the rotating wheel); the positive input end of the motor 301 is connected with the positive output end of the storage battery 300 through a wire, the negative input end of the motor 301 is separately connected with the two outer conductive rings 211 on both sides through wires (i.e. the negative input end of the motor 301 is led out two ways through a wire, each way is separately connected with one outer conductive ring 211), the negative output end of the storage battery 300 is separately connected with the two inner conductive rings 221 on both sides through wires (i.e. the negative output end of the storage battery 300 is led out two ways through a wire, and each way is separately connected with one inner conductive ring 221). Because there are two second water drainage holes 103, a support seat 201 is correspondingly disposed below each of the two second water drainage holes 103. The motor 301 and the battery 300 are housed in a safety case 302, protecting and waterproofing the motor 301 and the battery 300.

The drainage cover of the embodiment is mainly used in places such as roads or parks, wherein the well cover body 100 is installed on the well cover installation seat 102, and the well cover installation seat 102 is installed on a well head; the partition wall 110 has a blocking effect on sundries on one hand, sundries which reach the upper parts of the first drain holes 104 and the second drain holes 103 along with water flow are reduced, on the other hand, the protruding round table and the partition wall 110 have a certain supporting effect on the sundries on the well cover, the protruding round table and the inner partition wall 110 are arranged between the inner partition wall 110 and the outer partition wall 110, the outer partition wall 110 and the well cover mounting seat 102 are respectively and correspondingly provided with the annular grooves 106, when rainwater falls down, the water flow can effectively flow into the two first drain holes 104 through the annular grooves 106, meanwhile, the diversion grooves 107 enable the annular grooves 106 to be communicated with each other, the water flow is assisted to flow into the first drain holes 104, and drainage is accelerated.

In this embodiment, an orifice protruding ring 113 is disposed around the outer edge of the second water discharging hole 103, that is, the orifice protruding ring 113 is a higher wall than the second water discharging hole 103, and the orifice protruding ring 113 has a blocking effect on the impurities existing in the annular groove 106 and the diversion trench 107 flowing into the second water discharging hole 103 along with the water flow; the buoy 101 comprises a buoy cover 121 and a buoy rod 131, the diameter of the buoy cover 121 is larger than the outer diameter of the orifice convex ring 113, so that when no accumulated water exists above the orifice convex ring 113, the buoy cover 121 covers the orifice convex ring 113 under the action of self gravity, thereby preventing the odor in the sewer from rising upwards and realizing the deodorization function; when accumulated water is above the orifice convex ring 113, the floating cover 121 floats upwards in water due to the buoyancy effect, the accumulated water can flow into the orifice convex ring 113 from the space between the floating cover 121 and the top surface of the orifice convex ring 113 and is finally discharged, when the accumulated water above the well lid body 100 is gradually reduced until no accumulated water is above the orifice convex ring 113, the floating cover 121 continues to play a role of covering and deodorizing; wherein, the diameter of design cursory lid 121 is greater than the external diameter of drill way bulge loop 113, has made things convenient for the rapid come-up of cursory lid 121 in aqueous on the one hand, and on the other hand makes cursory lid 121 be located drill way bulge loop 113 top all the time, effectively plays and covers deodorant effect. It should be noted that, when the amount of rainwater is not large above the well lid body 100, the water flow cannot flow over the orifice convex ring 113, and at this time, the first drainage hole 104 plays a main drainage role, and when the amount of rainwater is large and the water flow flows over the orifice convex ring 113, the second drainage hole 103 also plays a drainage role at the same time, so that the accumulated water can be drained quickly.

In this embodiment, the cross bar 203 is used to fix the positioning cylinder 231, the positioning cylinder 231 on one hand limits the floating rod 131 from moving only in the vertical direction, on the other hand, the positioning cylinder 231 provides a rotary positioning shaft for the spiral knife 200, wherein the spiral knife 200 is the spiral shaft tube 220 and the spiral blade 230 on the spiral shaft tube 220, and when water flows from top to bottom in the drainage channel below the second drainage hole 103, the rotary direction of the spiral blade 230 is along the flow direction of the water flow; when the water flow is relatively large, the floating cover 121 floats from the orifice convex ring 113 under the buoyancy of water, at this time, the water flow can flow into the orifice convex ring 113 from between the floating cover 121 and the top surface of the orifice convex ring 113 to be discharged, when the water flow cannot be discharged in time or the rainfall is too large to form accumulated water with a certain depth above the orifice convex ring 113, the floating cover 121 floats to a certain height and drives the floating rod 131 and the conducting strip 111 connected with the lower end of the floating rod 131 to move upwards together, when the conducting strip 111 moves upwards to a certain position, the conducting strip 111 simultaneously contacts with the outer conducting ring 211 and the inner conducting ring 221 above, so that the series circuit formed by the storage battery 300 and the motor 301 is conducted, the rotating shaft of the power output end of the motor 301 simultaneously drives the two spiral shaft tubes 220 to rotate through the transmission belt 202, and the rotating spiral blades 230 have a vertically downward flow guiding effect on the water flow, on one hand, the flow and the flow speed of water flow in the drainage channel are accelerated, and more importantly, solids such as impurity particles and the like accumulated in the drainage channel are stirred and crushed, so that the drainage channel is kept always smooth, and the anti-blocking function is realized.

Example 2

Referring to fig. 2, the structure of the drainage cover of the present embodiment is substantially the same as that of embodiment 1, and further: the upper surface of the manhole cover body 100 is provided with an orifice standing ring 114 surrounding the outer edge of the first drainage hole 104; a plurality of water through holes 134 penetrating through the side wall of the orifice vertical ring 114 are arranged on the side wall of the orifice vertical ring 114; an automatic water falling tank 105 extends downwards from the inside of the first water drainage hole 104, the top end of the automatic water falling tank 105 is communicated with the corresponding first water drainage hole 104, a water falling hole is formed in the bottom end of the automatic water falling tank 105, one side of the water falling hole is connected with a water plug 125 capable of sealing the water falling hole through a fixed rotating shaft 155, and the water plug 125 is connected with a floating ball 115 positioned in the automatic water falling tank 105 through a traction line; a water falling hole at the bottom end of the automatic water falling tank 105 is communicated with a water inlet pipe 502 of the hydraulic generator 500 positioned below the water falling hole; the hydraulic generator 500 is fixed below the manhole cover body 100 through a corresponding fixing arm 501; the hydro-generator 500 is electrically connected to the battery 300, wherein the hydro-generator 500 is the power generation mechanism in this embodiment.

In this embodiment, the orifice vertical ring 114 has a certain blocking effect on the impurities in the water flow, so as to prevent the impurities from flowing into the automatic water-dropping tank 105 along with the water flow; when no water flows, the water plug 125 plugs the water falling hole at the bottom end of the automatic water falling tank 105 under the action of self gravity, so that the water falling hole is sealed, odor in a sewer is prevented from rising, and a deodorization function is realized, at the moment, the first water discharging hole 104 and the second water discharging hole 103 are both sealed, and the odor cannot reach the upper part of the well cover completely; when water flows, the water flows into the automatic water falling tank 105 through the plurality of water through holes 134 on the side wall of the orifice vertical ring 114, the floating ball 115 rises along with the rise of the water level in the automatic water falling tank 105, when the floating ball 115 rises to a certain position, the floating ball 115 pulls up the water plug 125 through the traction line, the water in the automatic water falling tank 105 flows into the water inlet pipe 502 of the hydraulic generator 500 through the water falling hole to drive the hydraulic generator 500 to generate electricity, the generated electric energy is transmitted to the storage battery 300 through a lead wire to be stored, and then the water flows into a sewer through the water outlet pipe 503 of the hydraulic generator 500; meanwhile, the storage battery 300 is connected with municipal power, so that the storage battery 300 can always supply power to the motor 301 normally.

Example 3

Referring to fig. 8, the structure of the drainage cover of this embodiment is substantially the same as that of embodiment 2, and further: a cylindrical film 213 is provided above the positioning cylinder 231 so as to be fitted around the float rod 131, the upper end of the cylindrical film 213 is connected to the outer side wall of the float rod 131, and the lower end of the cylindrical film 213 is connected to the upper end of the positioning cylinder 231.

In this embodiment, the height of the cylindrical membrane 213 is greater than the movement displacement of the floating rod 131 (i.e. the distance between the position of the floating rod 131 when not acted by the floating force and the limit position of the floating rod 131 when the floating rod 131 rises under the action of the floating force), and the cylindrical membrane 213 can effectively prevent the water flow from entering the supporting seat 201 along the gap between the floating rod 131 and the positioning cylinder 231, and prevent the water flow from affecting the connection and disconnection between the outer conductive ring 211 and the inner conductive ring 221.

Example 4

Referring to fig. 7, the structure of the drainage cover of this embodiment is substantially the same as that of embodiment 3, and further: the outer edge of the helical blade 230 is a knife edge.

In this embodiment, when the spiral knife 200 works, the spiral blade 230 is driven by the spiral shaft tube 220 to rotate, so as to crush the impurities entering the second water drain hole 103, prevent the impurities from blocking the second water drain hole 103, and effectively prevent blockage.

Example 5

Referring to fig. 5, the structure of the drainage cover of this embodiment is substantially the same as that of embodiment 4, and further:

two sides of the top end of the automatic water dropping tank 105 are respectively fixed with a water tank fixture block 135, and the top end of the side wall of the orifice standing ring 114 is provided with a clamping groove 124 for the corresponding water tank fixture block 135 to be embedded in from top to bottom.

In this embodiment, the water tank locking block 135 on the automatic water tank 105 is connected to the locking groove 124 in a matching manner, so that the automatic water tank 105 is fixed below the first drain hole 104.

Example 6

Referring to fig. 4, the structure of the drainage cover of this embodiment is substantially the same as that of embodiment 4, and further: the opening standing ring 114 has a filter material 145 embedded therein, and the width of the filter material 145 is larger than the inner diameter of the first drain hole 104.

In this embodiment, the filtering material 145 is used to prevent large-sized impurities from directly entering the automatic water dropping tank 105 to block the automatic water dropping tank 105, and in this embodiment, the filtering material 145 may be a metal screen or a cylindrical porous plastic block.

Example 7

The structure of the drain cover of the present embodiment is substantially the same as that of embodiment 6, and further: the orifice vertical ring 114 is not contacted with the inner and outer separation walls 110, and the orifice convex ring 113 is not contacted with the inner and outer separation walls 110, so that the water flow circulation is facilitated, and the rapid drainage is facilitated; the supporting seat 201 is arranged on the filter screen 400 below the supporting seat, the filter screen 400 is connected to the well lid body 100 through the fixing rod 401, and the filter screen 400 can further filter water flowing down from the first drainage hole 104 and the second drainage hole 103 to prevent sundries in a sewer from accumulating.

Example 8

Referring to fig. 9 and 11, the structure of the drainage cover of this embodiment is substantially the same as that of embodiment 7, and further: the lower end of the floating rod 131 is provided with an accommodating channel from bottom to top, the upper end of a telescopic spring 241 is connected to the top end in the accommodating channel, and the lower end of the telescopic spring 241 is connected with the conducting strip 111.

In this embodiment, the arrangement of the extension spring 241 enables the contact between the conductive sheet 111 and the upper outer conductive ring 211 and the upper inner conductive ring 221 to have a certain buffer degree, that is, when the height of the floating cover 121 fluctuates in a certain range, the conductive sheet 111 can keep a continuous contact state with the upper outer conductive ring 211 and the upper inner conductive ring 221 through the elastic extension of the extension spring 241, so that the helical blade 230 is continuously and uninterruptedly driven to rotate to form continuous flow guiding and blockage removing effects on the water flow.

Claims

1. A drain cover, comprising:

the manhole cover comprises a manhole cover body (100), wherein a manhole cover mounting seat (102) is surrounded on the outer side surface of the manhole cover body (100), and two annular concentric isolation walls (110) are arranged on the upper surface of the manhole cover body (100); the inner side of the partition wall (110) positioned on the inner side is provided with a raised circular truncated cone, and corresponding annular grooves (106) are respectively formed between the raised circular truncated cone and the partition wall (110) on the inner side, between the partition wall (110) on the inner side and the partition wall (110) on the outer side, and between the partition wall (110) on the outer side and the well cover mounting seat (102); two criss-cross guide grooves (107) are formed in the convex circular truncated cone, and two ends of each guide groove (107) extend towards the outer edge of the well lid body (100) and respectively penetrate through the inner and outer partition walls (110) in sequence;

the water drainage structure comprises two first drainage holes (104) and two second drainage holes (103), wherein one first drainage hole (104) is correspondingly arranged at the intersection of one flow guide groove (107) and the inner side partition wall (110), and the second drainage hole (103) is correspondingly arranged at the intersection of the other flow guide groove (107) and the inner side partition wall (110); the first drain hole (104) and the second drain hole (103) are through holes on the upper surface of the well lid body (100);

an orifice convex ring (113) surrounding the outer edge of the second drain hole (103) is arranged on the upper surface of the well lid body (100); a drainage channel penetrating through the whole well lid body (100) is arranged in the second drainage hole (103) in a downward extending mode, a floating rod (131) extends into the second drainage hole (103) from the upper side of the second drainage hole (103) and extends into the supporting seat (201) after extending downwards through the whole drainage channel, the upper end of the floating rod (131) is connected with a circular floating cover (121), the diameter of the floating cover (121) is larger than the outer diameter of the orifice convex ring (113), the lower end of the floating rod (131) is provided with an accommodating channel from bottom to top, the upper end of a telescopic spring (241) is connected to the top end in the accommodating channel, and the lower end of the telescopic spring (241) is connected with the conducting strip (111); the top surface inside the supporting seat (201) is fixed with an inner conducting ring (221) and an outer conducting ring (211) which are annular and concentric, and the inner conducting ring (221) is not contacted with the outer conducting ring (211);

a positioning cylinder (231) extends upwards from the upper surface of the supporting seat (201), the positioning cylinder (231) is sleeved outside the floating rod (131), the upper end of the positioning cylinder (231) is positioned below the second drain hole (103), cross bars (203) extend from the upper end of the positioning cylinder (231) to two sides respectively, and one end, far away from the positioning cylinder (231), of each cross bar (203) is fixedly connected to the inner side wall of the drainage channel; a spiral shaft pipe (220) is sleeved on the outer side of the positioning cylinder (231), and spiral blades (230) are fixed on the outer side surface of the spiral shaft pipe (220); the lower part of the spiral shaft tube (220) is connected with a rotating wheel on an output shaft of the motor (301) through a transmission belt (202); the positive input end of the motor (301) is connected with the positive output end of the storage battery (300) through a lead, the negative input end of the motor (301) is separately connected with the two outer conducting rings (211) through leads, and the negative output end of the storage battery (300) is separately connected with the two inner conducting rings (221) through leads;

an orifice standing ring (114) surrounding the outer edge of the first drainage hole (104) is arranged on the upper surface of the well lid body (100); a plurality of water through holes (134) penetrating through the side wall of the orifice vertical ring (114) are formed in the side wall of the orifice vertical ring (114); an automatic water falling tank (105) extends downwards from the inside of the first water discharging hole (104), the top end of the automatic water falling tank (105) is communicated with the corresponding first water discharging hole (104), a water falling hole is formed in the bottom end of the automatic water falling tank (105), one side of the water falling hole is connected with a water plug (125) capable of sealing the water falling hole through a fixed rotating shaft (155), and the water plug (125) is connected with a floating ball (115) located in the automatic water falling tank (105) through a traction line; a water falling hole at the bottom end of the automatic water falling tank (105) is communicated with a water inlet pipe (502) of a hydraulic generator (500) positioned below the automatic water falling tank; the hydraulic generator (500) is electrically connected with the storage battery (300);

a cylindrical membrane (213) sleeved outside the floating rod (131) is arranged above the positioning cylinder (231), the upper end of the cylindrical membrane (213) is connected to the outer side wall of the floating rod (131), and the lower end of the cylindrical membrane (213) is connected to the upper end of the positioning cylinder (231);

two sides of the top end of the automatic water falling tank (105) are respectively fixed with a water tank clamping block (135), and the top end of the side wall of the orifice vertical ring (114) is provided with a clamping groove (124) for embedding the corresponding water tank clamping block (135) from top to bottom.

2. The drain cover of claim 1, wherein: the supporting seat (201) is arranged on a filter screen (400) below the supporting seat, and the filter screen (400) is connected to the well lid body (100) through a fixing rod (401).