CN107724500B

CN107724500B - Floor drain

Info

Publication number: CN107724500B
Application number: CN201610653438.9A
Authority: CN
Inventors: 刘玉建
Original assignee: Dalian Yujian Technology Co ltd
Current assignee: DALIAN YUJIAN TECHNOLOGY Co.,Ltd.
Priority date: 2016-08-11
Filing date: 2016-08-11
Publication date: 2021-07-23
Anticipated expiration: 2036-08-11
Also published as: CN107724500A

Abstract

The invention belongs to a floor drain using water as a sealing device. The edges of the rectangular water storage tank 7 are provided with steps 28 protruding towards the periphery, and four parts of the four edges inwards form four elongated water drainage tanks 2. Four grate corner ends 8 of the grate 15 are covered on four corner ends 6 of the rectangular water storage tank 7 in a flat plate shape, and the edge 9 of the grate 15 forms the inner side of the long-strip-shaped drainage channel 2. The water return bowl rubber cover 22 is attached to the surface of the water return bowl 17, a 'return' check valve 23 is arranged on the edge of the water return bowl rubber cover 22, and the top surface of the water return bowl rubber cover 22 is in a seamless full-closed shape. The four edge drainage grooves 2 and the grate holes 11 form a double drainage system together, so that a drainage gate is opened, and the smooth drainage is ensured; the 'return' shape check valve 23 is unblocked when discharging water, and no gap is covered on the water storage tank 7 when returning to prevent water from being evaporated; the water return bowl rubber cover 22 is used for slowing down and absorbing positive and negative energy generated in a sewer, and solves the long-standing problem that the grate is blown by positive pressure or water is sucked away by negative pressure.

Description

Floor drain

Technical Field

The invention belongs to a device which is arranged on the ground and can drain water and close a water outlet, in particular to a floor drain which uses water as a closing device.

Background

The technology of a sealing device (water seal floor drain for short) using water as a floor drain is a well-known technology, namely a water return bowl is hung below a grate and is buckled at the upper part of a lower water opening, and the water storage surface of a water storage tank is level to the upper plane of the lower water opening, so that the lower water opening is blocked by the water inlet part of the water return bowl and is closed by water storage. The reservoir typically needs to be 50 mm deep to ensure that the stored water does not evaporate in time or is not sucked down by the negative pressure created by the sewer. The water return bowl is also called as a bell jar, because the shape of the bowl is like a bell jar, the skirt part of the bell jar is inserted into water to form a skirt part which only reciprocates the bell jar to enable the water to flow into the drain port, and the structure and the technical principle are simple and known by every housewife. Because of its long history, people may come into contact with it in the childhood. The height of water stored in a traditional water seal floor drain is calculated according to the height of 50 mm, the height of the water returning bowl invading into water is 25 mm, and conceivably, the higher the height is, the larger the up-down return distance of running water passing through the water returning bowl is, the larger the return distance is, the larger the resistance of the running water is, and the unblocked running water is caused. This is also a main reason why people need to take the upper cover (the grate and the water returning bowl are integrated) off to directly discharge the water.

The invention of the water seal floor drain is not designed for the ground of the modern toilet, it is mainly suitable for the water channel type drainage, namely the ground water storage reaches the certain height, produce the drainage occasion with greater pressure, suitable for the drainage depth that can form the state of swirl, under this state, the long return journey up and down of the water return bowl does not have the problem that the drainage resistance is big. The maximum amount of water on the floor of a modern toilet, particularly a household toilet, may be the point of bathing. But the floor is not allowed to exist, so that in the household toilet, firstly, the accumulated water which forms a vortex drainage state cannot exist; secondly, the floor of the modern toilet does not have the installation space required by high floor drain which can install water with the height of 50 mm. Modern floor drain designers therefore solve this space problem with simple height and diameter reductions, which inevitably brings new problems: the water storage quantity is less and easy to evaporate, the water is absorbed by the negative pressure generated by the sewer, the drainage resistance is large due to the narrow drainage channel with small diameter, and the like, and particularly, the water seal floor drain without water is similar to a nominal water seal floor drain without water after the water is drained for a long time.

No matter the traditional and modern water seal floor drains, the grate is not provided with a grate hole in the middle position generally, and the lower surface is shielded by the middle position of the circular arc of the water return bowl which is tightly attached without distance, so the drainage sectional area of the water seal floor drain is artificially reduced on the grate on the ground, and the drainage resistance is increased.

The water seal floor drain occasionally receives the influence of instantaneous positive and negative pressure in the public sewer. The instantaneous positive pressure can blow the light weight grate cover or discharge odor from the open water tank to the room; the momentary negative pressure may cause water in the reservoir to be drawn out. The traditional cast iron cover floor drain has heavy weight, can not cause the situation that the cover is blown open, but is easy to discharge odor indoors from a water storage tank which is opened indoors; in the traditional floor drain, because the water tank is open, when negative pressure exists in a sewer, the indoor pressure is higher than the pressure of the sewer, and therefore the possibility of sucking water can also occur. For the modern small floor drain with the reduced diameter and the reduced water storage height, the two situations are easier to occur. In order to solve the problem, a small hole is arranged above a water return bowl of the traditional water seal floor drains and directly leads to the room through a grate, and the small vent hole is used for solving the positive and negative pressure instantly generated in a public sewer, namely, the gas with positive pressure is discharged into the room through the small hole, so that the cover is prevented from being pushed open; when the negative pressure is applied, air in the room is sucked to prevent water in the water storage tank from being sucked out. Therefore, the water seal floor drain is an incomplete sealing floor drain with a direct small air hole, and the sealing performance of the water seal floor drain is influenced. The problem that the water seal floor drain cannot solve for a long time.

Although the water seal floor drain has the advantage of reliable sealing, the biggest defect is that the sealing device does not exist when the water stored in the local water leakage storage water tank is not available. Both traditional and modern floor drains have the common feature that the water in the water storage tank is open to the room and is therefore easily evaporated by the dry air in the room. To solve this problem, one wants to completely abandon this traditional water sealing technology. Designers have therefore designed a figure eight check valve to replace the old water seal technology. However, all the check valves are arranged on a narrow passage at a sewer opening, so that the problem of large return resistance of the floor drain of the water return bowl is not solved, the originally narrow passage is narrower due to the arrangement of the spring, the hinge, the magnet and the like, and the drainage resistance is greatly increased.

The design concept of arranging a mechanical check valve on a sewage discharge pipeline with a limited diameter (the national standard of the outer diameter of a sewer with a sewer inlet is 50 mm) is wrong. For example, a mechanical check valve installed on a gasoline pump of an automobile, firstly, a gasoline filter is installed on a front pipeline to filter impurities from clean gasoline in a gasoline tank, so as to ensure the reliability of the mechanical check valve of the gasoline pump in front of the pipeline, i.e., the mechanical check valve of the gasoline pump in front of the pipeline is absolutely prohibited from being blocked by the impurities to form a gap. Therefore, the mechanical check valve arranged on the drain hole of the sewage drainage floor drain is just a subjective desire that sealing cannot be realized; secondly, the hinge for opening and closing the check valve is arranged on the circular pipeline with the limited diameter, the sectional area of drainage needs to be reduced, namely, a part of the circular drainage port is blocked, a space for arranging a linear hinge is generated, and the structure results that only a large semicircular valve can be arranged, the diameter of the drainage port is reduced, and the drainage resistance is increased; third, mechanical check valves of whatever construction require force to open. As is known, floor drain drainage relies on gravity to drain water, unlike the external pressure of a tap water pipeline. The objective condition of the check valve arranged on the drain outlet of the floor drain provides only a small mobile pressure to the check valve. Because the height from the ground to the check valve is limited, i.e. the potential energy build up is small. In order to ensure the opening of the floor drain check valve, the elastic force for closing the valve is as small as possible, and on the other hand, the tightness of the valve determines the elastic force for returning the valve. Therefore, the technical complexity is caused on the problem, and the reliability is difficult to guarantee; fourthly, the check valve is arranged at the bottommost part of the floor drain, if a fault occurs, the fault is not easy to find, and one floor drain which is not closed is often used as a normal floor drain. Even if inadvertently discovered, it is relatively cumbersome to handle.

Therefore, the mechanical floor drain arranged at the lower water outlet is far inferior to the traditional water-seal floor drain in terms of sealing degree, drainage resistance and use convenience.

The floor drain is a drainage device embedded in the ground. The floor drain is an era of cement ground, and the era leaves an edge which is required to be arranged to be connected with the cement ground. When a floor drain enters the era of a floor tile, this traditional habit remains, namely: the upper edge of the water tank of the floor drain is required to be provided with an appearance edge, in particular to an edge with decoration which is connected with a floor tile. The decorative edge is provided with a concave platform for assembling a grate of the floor drain. No one has gone beyond this traditional habit for many years by whatever designer. Even in order to adapt a circular floor drain to the requirements of square floor tiles, the traditional concept seems to be very well-founded by filling up the missing part on the edge to form a square edge.

In order to match the top surface of the floor drain with the floor tiles, most modern floor drains are made of stainless steel materials. The grate of the floor drain is made of stainless steel material and is really adapted to the surface of the bright floor tile. However, the main part of the stainless steel water storage tank is buried under the ground, which is a waste. The parts of the water tank, the water return bowl and the water outlet of the floor drain which are not exposed on the ground surface are also made of stainless steel materials, which is waste. And this is a waste of not only material but also processing costs. There is no other way of saying that the upper edge of the prior art sink is of the same material as the stainless steel grate, i.e. the same stainless steel material as the grate. This construction results in the need to use a stainless steel sink to match the upper edge of the sink with the stainless steel grate.

The ideal floor drain has no resistance to water drainage, and the floor drain is required to drain water to a sewer as soon as possible; when the drainage is stopped, absolute sealing is required, namely, a sewer and an indoor passage are reliably blocked. This should be the direction of the principles and efforts followed by all designers. However, in actual design, designers often look to only one aspect of the problem and ignore another.

The rectangular floor drain with the patent application number of 2010102595403 makes breakthrough reform on the traditional circular water seal floor drain, and the effect of the rectangular floor drain is close to the technical requirement of an ideal floor drain. The main measure is that the volume of the water storage tank is increased through a rectangular structure to increase the water storage amount; the drainage area of the grate is increased, so that the number of drainage holes of the grate is increased; the sectional area of the drain water is increased to reduce the drain resistance, etc. However, the open state that the water in the water storage tank is in contact with the air still exists in the channels between the four sides of the water return bowl and the tank wall of the water storage tank, and although the water storage amount of the rectangular water storage tank is larger than that of the circular floor drain, the evaporation time is prolonged, the water cannot be completely prevented from being evaporated, and the sealing performance cannot be maintained for a long time.

The 'water grate for preventing water evaporation' patent application No. 2012100627983 is characterized in that check valves are arranged on grate holes, one check valve is arranged in each grate hole, and if 24 grate holes are provided, 24 check valves are required. Although this is a positive measure to prevent water evaporation, the design is relatively complex; on the other hand, the height difference between the grate and the ground is limited, the potential energy is almost equal to zero, although the valve material is very thin, the potential energy for opening the valve is still too small, and the whole opening can be realized only when water is stored on the ground, which is contradictory to the requirement of no water storage in modern toilets; thirdly, the connection between the grate and the upper edge of the water storage tank is clearance fit and is not a sealing measure.

An environment-friendly energy-saving self-cleaning built-in closed water seal odor-resistant floor drain with the patent number of 200710177658X is another expression form of the traditional water seal floor drain, and the structure of the floor drain still has the principles and the structures of a water storage tank, a water return bowl and a water drainage port. In terms of structure, the diameter-variable flow guide pipe reduces the diameter of the drain pipe, so that the sectional area of the drain pipe is reduced; the oil-extracting water-storing cup deepens the depth of the water-storing groove and makes the section of the backflow narrower, and the oil-extracting water-storing cup is assembled in a standard 50 mm water outlet channel to make the channel narrower, so that a special filtering device is required to be arranged on a grate to prevent sundries such as hair from entering the narrow channel. This is a typical improved floor drain that only considers tightness and not drainage rate. In general, the traditional water seal floor drain is not separated, the return distance is long, the drainage sectional area is small, the stored water in the water storage tank is directly contacted with indoor air, namely the water in the water storage tank is in an indoor open state. Therefore, the defect of the floor drain is the same as that of the old and new water seal floor drain, but the floor drain gives a novel feeling in appearance. The floor drain is imitated into various kinds in the market, and is also named as a floor drain core. The drainage work picture of the floor drain core is that water is poured to the top surface of the floor drain at a certain height to display the smooth drainage image of the floor drain core. This picture is erroneous in that: the potential energy is increased by pouring water with the improved height, and the floor drain is not in a real and objective state with small potential energy; secondly, clean water and mixed water are not liquids of one nature. In a word, the floor drain core is a floor drain with a reduced drainage sectional area and large drainage resistance.

In the floor drain with the patent application number of 2016101538519, four rectangular check valves are separately arranged, two ends of two of the four rectangular check valves are in an unsupported state, so that the front end of the four rectangular check valves is drooped, and the sealing performance of the check valves is affected; a gap is exposed at the high platform of the top surface of the water returning bowl rubber cover, and the water returning bowl rubber cover is not completely sealed, so that a closed space cannot be formed at the lower (inner) part of the water returning bowl rubber cover, the slow-down function under the action of the positive pressure of a sewer is influenced, and ozone possibly enters a room from the gap without a sealing measure; in the aspect of a drainage system, only one traditional drainage system is provided, and the opening degree of a gate is not large enough; the edge of the floor drain is not positioned on the floor tile directly, so the floor drain is not positioned well.

Disclosure of Invention

Aiming at the existing problems, the invention provides the floor drain which ensures smooth drainage under the premise of ensuring the sealing performance of the floor drain.

The technical scheme of the invention is as follows:

a rectangular floor drain mainly comprises a rectangular grate 15, a rectangular water return bowl 17, a rectangular water storage tank 7, an oval sewer port 1 and a water return bowl rubber cover 22, wherein the edge of the top end of the rectangular water storage tank 7 is provided with steps 28 protruding towards the periphery, the four edges of the steps 28 are concave and concave inwards except for corner ends 6 of the water storage tank, the inwards concave parts form four strip-shaped water drainage grooves 2 at the edge of the floor drain, the water drainage grooves 2 are communicated with a water drainage channel 4, the four corner ends 6 of the water storage tank form the outermost edge of the rectangular water storage tank, the corner ends 6 of the water storage tank are arranged on the top surface in a plane shape, the plane shape of the rectangular grate 15 corresponds to the plane shape of the rectangular water storage tank 7, the corner ends 8 of the four grates are covered on the corner ends 6 of the rectangular water storage tank 7 in a flat shape, four edges of the length corresponding to the length of the drainage channel 2 are folded into folded edges 9, and the folded edges 9 form the inner side of the long-strip-shaped drainage channel 2.

A water returning bowl rubber cover for floor drain is characterized in that a water returning bowl rubber cover 22 is attached to the surface of a water returning bowl 17, a check valve 23 is arranged on the edge of the water returning bowl rubber cover 22, and an air bag 26 protruding upwards is arranged at the top of the water returning bowl rubber cover 22.

The "back" check valve 23 is an example of a flat plate shape;

the square platform shape of the "back" check valve 23 is another embodiment.

The invention has the technical effects that the structure of the strip-shaped drainage groove is arranged on the steps which are protruded towards the periphery at the top end of the rectangular water storage groove, and the purpose is to open the 'gate' for drainage to the maximum, namely, the article is not completely made on the area and the holes of the conventional grate, and the traditional concept of people is broken through, the drainage is not carried out through the normal grate, and a new channel is selected alternatively, namely, the drainage is carried out by utilizing the four edges of the grate. This is not a problem of simply increasing the sectional area of the drain, but rather, opens up an optimal drain passage to improve the efficiency of the drain. No matter what structure of the water sealing floor drain is, a final channel before water drainage and reversing (before water return) is arranged between the outer edge of the water return bowl and the wall of the water storage tank, and generally, water falling from the grate holes firstly passes through the top of the water return bowl and then can flow into the final channel. The drainage by the four edges of the grate is equal to that without the blockage of the water return bowl, the water directly enters the final channel. The drainage potential energy reaches the maximum due to the larger fall from the ground to the final channel, and the effect of smooth drainage is achieved. If the drainage from the grate holes of the traditional floor drain is the only drainage channel, the drainage from the four edges of the grate is equivalent to additionally arranging a new drainage channel, namely the floor drain adopts the technical scheme of realizing a double drainage system, and the aim of smooth drainage is fulfilled. The value of the double-drainage system is also shown in that the double-drainage system is just realized by simply adding a step which protrudes to the periphery in the water storage tank. This is almost no change in cost for a plastic sink. The structure is a structure which is beautiful, namely, under the condition that the area of the grates (the number of grate holes) is not increased, the technical effect that the drainage is smoother than the drainage of the limited grate holes is obtained; on a shaped water storage tank, four long-strip-shaped drainage channels are additionally expanded to the periphery, and the drainage channels with considerable length cannot be arranged on the grate. The structure does not enlarge the area of the grate, so that the grate still keeps the original span of the original size. Apparently, the areas of the four corner ends of the grate are increased, and the materials of the four corner ends are supplemented from the original folded edge, namely, no precious stainless steel material or copper material is added. The four corner ends are made into a plane shape, the processing technology is simplified, and the four folded edges are simplified into the simplest bending technology without complex stretching forming. The four corner ends of the grate are planar, and the shape of the four corner ends separated by the drainage grooves forms an attractive figure in appearance, so that the traditional floor drain which can only be round or rectangular is changed into the floor drain with novel pattern edges. From this perspective, this is a technical effect of both beauty.

The arrangement of the drainage grooves arranged around the grate is based on the objective condition of paving the floor tiles on the modern ground, namely, the other side of the drainage groove is the edge of the floor tile. The natural drainage groove made of the edge of the floor tile breaks through the traditional concept that only the grate hole is the only drainage hole on the ground. One side of the drainage groove is a folding edge of the grate, and the other side of the drainage groove is the edge of the floor tile. The use of the edge of the floor tile as a drainage channel is a matter that modern floor drain designers want to be afraid of. But in fact the edges of the tile are not functionally inferior to the edges of the grate holes.

The final channel before the drainage direction is changed (through the edge of the water returning bowl) is actually the narrowest channel of the floor drain drainage system, and the narrowest rectangular channel is used for arranging the check valve, so that the check valve has a simple structure and good technical reliability. The check valve seals the water in the water storage tank like a bottle cap, so that the water is not allowed to contact with indoor air, the water in the water storage tank cannot be evaporated, the sealing performance of the floor drain is ensured, and the problem which cannot be solved by the traditional water seal floor drain for a long time is solved. Only the check valve is arranged on the lower water gap, and the check valve is not arranged on the closed water tank.

The technical measure that the water in the water storage tank is not evaporated is guaranteed, and the height of the water return bowl, namely the return distance of the drained water, can be greatly reduced. This is of great significance because the resistance to drainage is greatly reduced. Two further beneficial effects ensue: firstly, the height of the floor drain is reduced, and the floor drain is suitable for installation on any ground; secondly, the distance between the top of the water returning bowl and the bottom surface of the grate can be increased to increase the precious potential energy of water drainage, increase the water drainage speed and realize the water drainage mode with minimum resistance; the distance is not increased, so that the whole area of the grate is provided with the drainage holes, and the sectional area of drainage is increased.

Due to the rectangular shape, especially the oblong shape, the length advantage of the elongated final channel does not affect the cross-sectional area of the drainage. This relatively long perimeter construction also provides excellent objective conditions for opening up the second drainage channel.

The structure that connects four rectangle check valves together can form the flat totally closed state of annular, avoids the overlength part (the extension part of angle) to appear in original opening part unsupported flagging state, has improved the leakproofness of check valve. When water is drained, because the silica gel check valve is thin and has good elasticity, the four corners can automatically generate wrinkles, the effect of smooth drainage is not influenced, and the effect is the same as that of an open check valve; the four check valves are made into a square platform-shaped structure, so that the folding angle can be reduced. The technical scheme for reducing the folding angle can reduce the folding range no matter the return after drainage and drainage, and certainly is more favorable to the drainage on the one hand, and on the other hand is favorable to the return to be sealed. It is also important that the square cone check valve acts as a reverse cap when the sewer is under positive pressure, not only being unable to be blown over, but also acting as a buffer for energy release.

The advantage of totally sealing the rubber cover of the whole floor drain water return bowl is that when positive pressure is generated in the sewer, the rubber cover of the whole water return bowl is a large air bag, namely, the whole rubber cover attached to the water return bowl can be expanded after air enters from the exhaust hole, and the effect of energy slowing is achieved. Due to the sealing function of the check valve, the whole gas is buffered in the water returning bowl rubber cover, so that the event that odor enters a room cannot happen.

Drawings

The present invention is described in further detail below with reference to the attached drawing figures.

FIG. 1 is a schematic view of a floor drain water storage tank;

FIG. 2 is a schematic view of a floor drain grate;

FIG. 3 is a schematic diagram of a floor drain water return bowl;

figure 4 is a schematic diagram of a rubber cover of a floor drain return water bowl.

In the figure, 1, an elliptical sewer port, 2, a drainage channel, 3, an outer edge, 4, a drainage channel, 5, a supporting column, 6, a corner end of a water storage tank, 7, a water storage tank, 8, a corner end of a grate, 9, a grate hem, 10, a grate pit, 11, a grate hole, 12, a large round hole, 13, a trademark pit, 14, a screw hole, 15, a grate, 16, a plateau, 17, a water return bowl, 18, a fixing hole, 19, a through hole, 20, an air slowing chamber, 21, a slope, 22, a water return bowl rubber cover, 23, a check valve, 24, a plateau cover, 25, a plateau cover hole, 26, an air bag, 27, a cover slope, 28 and a step.

DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION

Referring to the attached figure 1, the floor drain water storage tank 7 is formed by plastic injection molding, and plastic can be made into various shapes at will, so that the step 16 protruding to the periphery is easily arranged on the edge of the top end, the strip-shaped drainage groove 2 is arranged on the plane of the step 16 on the periphery, the drainage groove 2 is provided with the outer edge 3, the height of the edge 3 with the water surrounding effect is lower than the plane, the main edge of the drainage groove 3 is mainly formed by the edge of the installed floor tile, the width of the drainage groove 2 is correspondingly increased, and therefore the edge 3 is not too high (a gluing space can be reserved), and certainly, the same plane as the corner end 6 of the water storage tank is also an embodiment. The water in the drainage channel 2 flows into the water storage tank from the bottom of the grate 15. Thus, water drains 4 are provided between the support columns 5 of the support grate 15. This is one example; in another embodiment, the whole drainage channel 2 is directly communicated to the inner side wall of the water storage tank 7 without the support column 5, and the drainage channel 4 and the drainage channel 2 are integrated into a strip-shaped drainage channel without any obstruction, and the channel can pass stick-shaped sundries with the length of the toothpick, because the lower channel is the strip-shaped check valve 23 and the oval drainage port 1 with a considerable length and is a channel which is difficult to discharge the sundries. The grate fold 9 of the grate 15 of this embodiment is relatively high in height, ensuring a rigidity that is free of support (without support columns 5). The depth of the drainage channel 4 can be directly to the slightly higher position of the check valve 23, and the drainage potential energy of the structure is larger than that of the floor drain with any structure, namely, water directly reaches the interface of the check valve 23 from top to bottom without blocking (without passing through the surface of the water return bowl 17). Four drainage channels 2 are separated by four corner ends 6 of a rectangular water storage channel 7, the top surfaces of the four corner ends 6 are the highest planes of the plastic water storage channel 7 and are also the main bearing surfaces of the grate 15, and particularly under the condition of no structure of the bearing columns 5, the whole grate 15 is supported by the four corner ends 6 of the water storage channel. The side edges of the corner ends 6 of the storage tank are the outermost edges of the entire storage tank 7, so that the four corner ends 6 of the storage tank can be the standard base points when laying the floor tiles.

The elliptic opening drain 1 is characterized in that the uppermost end of the drain is elliptic, and the diameter of the drain gradually transits to a circular standard drain and is connected with a national standard sewer pipe. The inlet at the upper end of the elliptical water outlet enables water to rapidly enter the water outlet from a longer circumference range than a circular water outlet and then generate pressure to enter a relatively narrow sewer, and the water outlet is also called a 'funnel' type water outlet, so that the water can be swallowed through the mouth opening of the water outlet, and the final result is required by the invention. The oval structure is a technical scheme that a 'mouth' is opened under the condition that the width of the floor drain is not increased, and the oval structure is an embodiment of a rectangular floor drain.

Referring to fig. 2, the planar shape of a rectangular grate 15 made of stainless steel plates (other metal plates can be used) corresponds to the shape of the top surface of a rectangular water storage tank 7, four grate corner ends 8 of the rectangular grate 15 are flat-plate-shaped and cover the top planar surfaces of four water storage tank corner ends 6 with the same shape of the rectangular water storage tank 2, four edges with the same length size as the water drainage tank 2 are provided with folded edges 9, the folded edges 9 form the inner side surface of a long strip-shaped water drainage tank 2, the width of the water drainage tank 2 is formed between the inner side surface and the outer edge 3 of the water storage tank 7, and the width of the water drainage tank can be controlled at the width of a grate hole 11 or slightly larger than the width of the grate hole 11. The long hole which is several times longer than the grate hole 11 in length is a channel for discharging impurities and also a channel for discharging water around the floor drain to start discharging water firstly. The two length ends of the fold 9 are matched to the length between the two storage tank corner ends 6, i.e. the grate 15 is positioned by the length between the four storage tank corner ends 6. The rectangular size formed by the corner ends 8 of the four grates is slightly smaller than that formed by the corner ends 6 of the four water storage tanks, and is equal to the standard gap between the grate 15 and the edge of the floor tile, so that the grate is convenient to open and cover. The positioning of the grate 15 is determined by the length between the four corner ends 6 of the sump.

The upper plane of the grate 15 is provided with a plurality of dense grate holes 11, and the grate holes 11 sink into the two grate pits 10 respectively, so that firstly, the grate holes can be lower than the ground plane to form small potential energy, which is favorable for drainage; secondly, the grate pit 10 is equivalent to a reinforcing rib, and the flat plate type grate 15 can be prevented from being folded and bent accidentally, so that the grate 15 has the same rigidity as cast iron.

Two large circular holes 12 are arranged in the middle of the grate 15, so that the relatively narrow grate holes 11 can be prevented from being blocked and water cannot be drained. The large round hole 12 has a relatively large diameter and is not easy to block, so that the drainage is not completely blocked; secondly, the big round hole 12 is arranged above the check valve 23, namely above the drainage channel, the big round hole 12 can be used for discharging sundries, because the floor drain enters the spacious water storage tank 7 only after passing through the check valve 23 and then enters the sewer port 1, and one way is unobstructed. The greatest desire of people to drain floor drains is to discharge sundries; thirdly, the two symmetrical large round holes 12 are handles, and when people need to lift the grate 15, two fingers can be inserted into the holes to take the grate.

The oval trademark pit 13 is arranged at the center of the grate 15, so that the function of decoration is achieved; secondly, an obvious position is found for the trademark; thirdly, the trademark is made into a paper-cut shape, and a special grate hole can be formed for draining water; fourthly, the trademark pit 13 is positioned at the position where the plate-shaped grate 15 is most easily bent accidentally at the middle position of the grate, so the trademark pit 13 with the reinforcing ribs plays the role of protection.

Of course, other forms and patterns of the grate holes 11 are also within the design of this principle.

Referring to fig. 3, the rectangular floor drain return bowl 17 is not only rectangular, but also has a shape similar to the roof of a house. The slope type house roof around which people create has the greatest characteristic that rainwater can flow down rapidly. The house roof with slope around is introduced into the shape of a water return bowl of the floor drain, namely, the slope 21 is arranged on the water return bowl 17 to improve the drainage speed; the second measure is that a high platform 16 with corresponding height is arranged on the top surface of the water returning bowl 17, so that the water returning bowl 17 and the bottom surface of the grate 15 are separated by a certain distance, thus the grate holes 11 can be arranged on the grate 15 in the whole area, and the problem that the grate holes 11 cannot be arranged in the middle of the traditional floor drain is thoroughly solved. And all the grate holes 11 can be drained smoothly. The water return bowl 17 is formed by plastic injection molding, so that the high platform 16 is particularly simple to arrange, the high platform 16 is provided with a fixing hole 18, and the water return bowl is directly screwed into the fixing hole 18 of a plastic part through a self-tapping screw, so that the connection is particularly convenient and reliable. The raised platform 16 is provided with two shoulders to enable the return bowl 17 to be firmly fixed under the grate 15 with only two screws.

An air retarding chamber 20 is arranged at the top of the water returning bowl 17, and a through hole 19 communicated with the bottom surface of the water returning bowl 17 is arranged in the air retarding chamber 20. These structures are too simple for plastic parts, both in terms of structure and process.

Referring to fig. 4, the water returning bowl rubber cover 22 is a rubber product which completely covers the upper surface of the water returning bowl 17 and has a totally-enclosed effect in the cover. When the water returning bowl 17 is provided with the raised plateau 16, the water returning bowl rubber cover 22 is also provided with a plateau cover 24 in the same shape to completely cover the plateau 16, so that the sealing property in the cover is ensured, and the corresponding plateau cover hole 25 is arranged. When the grate 15 is fixed in the fixing hole 18 of the water return bowl 17 by the self-tapping screw, the water return bowl rubber cover 22 clamped in the middle, namely the plateau cover hole 25 on the plateau cover 24, is clamped and pressed tightly, the silica gel layer is a rubber sealing gasket, and the inside of the water return bowl rubber cover 22 is absolutely kept in a sealing state. An air bag 26 is arranged on the top surface of the water returning bowl rubber cover 22, and the air bag 26 is just buckled above the air slowing chamber 20 on the top surface of the water returning bowl 17. When negative pressure is generated in the sewer, the air in the air bag 26 and the air retarding chamber 20 is sucked into the sewer through the through hole 19 on the water returning bowl 17, so that the water stored in the water storage tank 7 can be prevented from being sucked into the sewer; when positive pressure is generated in the sewer, gas enters the space of the air bag 26 and the air retarding chamber 20 from the through hole 19 of the water returning bowl, if the volume of the gas is small, the gas can be retarded through the space, if the volume of the gas is larger, the rubber cover 22 of the water returning bowl can be expanded, namely the cover is elastically deformed or expanded upwards to retard the instantaneous positive pressure, so that the occurrence of the event that the floor drain grate 15 is pushed open and the occurrence of odor entering the chamber can be avoided. The grate 15 is often pushed open by an instant pressure, which has been a long unsolved problem. A low cost return water bowl rubber cover 22 completely solves this problem. All this effect comes from the absolutely sealed structure inside the water return bowl rubber cover 22.

The lower edge of the water return bowl rubber cover 22 is connected with a drainage channel check valve 23, the drainage channel is a 'return' cross section formed between the edge of the rectangular water return bowl 17 and the inner edge of the rectangular water storage tank 7, the narrowest part of the drainage channel is provided with the check valve 23, which is equivalent to adding a 'bottle cap' on the container of the water storage tank 7 to prevent the stored water from contacting with air so as to prevent the stored water from being evaporated. The check valve 23 has the same "back" shape as this narrow passage. When water falls, the 'return' shaped check valve 23 bends downwards and is attached to the side edge of the water return bowl 17, four corner ends of the 'return' shaped check valve 23 can be automatically deformed into wrinkles due to the softness of the valve plate, and when no water passes through the check valve, the 'return' shaped check valve 23 automatically returns to the 'return' shaped state to close the narrow channel.

Another embodiment of the check valve is that the check valve 23 at the lower edge of the water returning bowl rubber cover 22 is in the shape of a quadrangular frustum pyramid, i.e. a check valve 23 in the shape of a Chinese character 'hui' with each edge being inclined downward. The structure has the advantages that the opening and closing stroke of the check valve plate is short, and reverse closing is facilitated.

The arrangement of the water return bowl rubber cover 22 (including the check valve 23 part) ensures that the water stored in the water storage tank 7 is not evaporated by the indoor dry air and can not be sucked away by the negative pressure generated in the sewer. The greatest significance of the effect is that the height of the stored water can be reduced at ease, the height of the water returning bowl 17 is reduced, and the distance of the water passing through the water returning bowl 17 is reduced, so that the water discharging speed can be greatly improved, and the aim of smooth water discharging is fulfilled. This is also a critical solution to achieve its purpose. Summarizing, the technical scheme for ensuring the smoothness is as follows:

1. the four edge drainage grooves 2 and the grate holes 11 form a double drainage system together, so that a drainage gate hole is opened;

2. the rectangular floor drain is formed by expanding the drainage sectional area in a mode of increasing the perimeter;

3. the water return bowl 17 with short water return stroke reduces the drainage resistance;

4. a water storage tank 7 with a bottle cap and provided with a check valve 23 is used for preventing water from being evaporated;

5. the water return bowl rubber cover 22 for preventing the sewer from generating negative pressure prevents water from being sucked away;

6. a high platform 16 for separating the return bowl 17 from the bottom surface of the grate 15, wherein the grate is provided with a grate hole 11 in the whole area; increasing the drainage potential energy;

7. the water return bowl 17 (slope 21) of the slope technology of the four sides of the house without resistance of flowing water is introduced to reduce the drainage resistance.

The technical scheme of the floor drain is that eight measures are adopted to ensure smooth flow; the water storage is not easy to evaporate and suck away. The two indexes of 'quick drainage and good sealing' are ideal indexes for the dreaming of floor drain designers. On the contrary, if only one index is emphasized, the floor drain is a defect floor drain.

Claims

1. A floor drain, set up a high platform (16) with corresponding height on the top surface of the bowl (17) of returning water, make the bowl (17) of returning water and bottom surface of the grate (15) pull apart certain distance, set up the fixed hole (18) on the high platform (16), screw into the fixed hole (18) of the plastic part directly through the tapping screw, the high platform (16) has two shoulders to make the bowl (17) of returning water can be fixed under the grate (15) firmly only with two screws, the drain passage of the "return" font cross-section formed between edge of the rectangular bowl (17) of returning water and inner edge of the rectangular water storage tank (7), four grate corner ends (8) of the rectangular bowl (15) are covered on the top plane of corner end (6) of four water storage tanks identical in shape of the rectangular water storage tank (7) in the form of the flat plate, set up the oval sewer (1) in the rectangular water storage tank (7), the rubber cover (22) of returning water is laminated on the surface of bowl (17), the top of a water returning bowl rubber cover (22) is provided with an air bag (26) which protrudes upwards, the edge of the water returning bowl rubber cover (22) is provided with a check valve (23), and the water returning bowl rubber cover is characterized in that steps (28) which protrude towards the periphery are arranged on the edge of the top end of a rectangular water storage tank (7), except for corner ends (6) of the water storage tank, four edges of the steps (28) are concave and concave inwards, four strip-shaped drainage grooves (2) are formed at the edge of a floor drain by inwards concave parts, the drainage grooves (2) are communicated with a drainage channel (4), the four corner ends (6) of the water storage tank form the outermost edge of the rectangular water storage tank, the corner ends (6) are arranged on the top surface and are planar, the planar shape of a rectangular grate (15) corresponds to that of the rectangular water storage tank (7), four edges with the length corresponding to that of the drainage channel (4) are folded into folded edges (9), and the folded edges (9) form the inner side of the strip-shaped drainage channel (4), the lower edge of the water returning bowl rubber cover (22) is connected with a drainage channel check valve (23), the check valve (23) has the shape of a 'return' shape which is the same as that of the narrow channel, when water falls, the 'return' shaped check valve (23) bends downwards and is attached to the side edge of the water returning bowl (17), four corner ends of the 'return' shaped check valve (23) can be automatically deformed into wrinkles due to the fact that a valve sheet is thin and soft, when no water passes through the 'return' shaped check valve (23) automatically restores to the 'return' shaped state to seal the narrow channel, the check valve (23) at the lower edge of the water returning bowl rubber cover (22) is in a quadrangular frustum shape, namely, each edge of the 'return' shaped check valve (23) inclines downwards.